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freebsd-skq/sys/netinet/sctputil.c
glebius 5cc3ac5902 Switch the entire IPv4 stack to keep the IP packet header 
in network byte order. Any host byte order processing is
done in local variables and host byte order values are
never[1] written to a packet.

  After this change a packet processed by the stack isn't
modified at all[2] except for TTL.

  After this change a network stack hacker doesn't need to
scratch his head trying to figure out what is the byte order
at the given place in the stack.

[1] One exception still remains. The raw sockets convert host
byte order before pass a packet to an application. Probably
this would remain for ages for compatibility.

[2] The ip_input() still subtructs header len from ip->ip_len,
but this is planned to be fixed soon.

Reviewed by:	luigi, Maxim Dounin <mdounin mdounin.ru>
Tested by:	ray, Olivier Cochard-Labbe <olivier cochard.me>
2012-10-22 21:09:03 +00:00

6917 lines
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/*-
* Copyright (c) 2001-2008, by Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2008-2012, by Randall Stewart. All rights reserved.
* Copyright (c) 2008-2012, by Michael Tuexen. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* a) Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* b) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* c) Neither the name of Cisco Systems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <netinet/sctp_os.h>
#include <netinet/sctp_pcb.h>
#include <netinet/sctputil.h>
#include <netinet/sctp_var.h>
#include <netinet/sctp_sysctl.h>
#ifdef INET6
#endif
#include <netinet/sctp_header.h>
#include <netinet/sctp_output.h>
#include <netinet/sctp_uio.h>
#include <netinet/sctp_timer.h>
#include <netinet/sctp_indata.h>/* for sctp_deliver_data() */
#include <netinet/sctp_auth.h>
#include <netinet/sctp_asconf.h>
#include <netinet/sctp_bsd_addr.h>
#ifndef KTR_SCTP
#define KTR_SCTP KTR_SUBSYS
#endif
extern struct sctp_cc_functions sctp_cc_functions[];
extern struct sctp_ss_functions sctp_ss_functions[];
void
sctp_sblog(struct sockbuf *sb, struct sctp_tcb *stcb, int from, int incr)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.sb.stcb = stcb;
sctp_clog.x.sb.so_sbcc = sb->sb_cc;
if (stcb)
sctp_clog.x.sb.stcb_sbcc = stcb->asoc.sb_cc;
else
sctp_clog.x.sb.stcb_sbcc = 0;
sctp_clog.x.sb.incr = incr;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_SB,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_closing(struct sctp_inpcb *inp, struct sctp_tcb *stcb, int16_t loc)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.close.inp = (void *)inp;
sctp_clog.x.close.sctp_flags = inp->sctp_flags;
if (stcb) {
sctp_clog.x.close.stcb = (void *)stcb;
sctp_clog.x.close.state = (uint16_t) stcb->asoc.state;
} else {
sctp_clog.x.close.stcb = 0;
sctp_clog.x.close.state = 0;
}
sctp_clog.x.close.loc = loc;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_CLOSE,
0,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
rto_logging(struct sctp_nets *net, int from)
{
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.rto.net = (void *)net;
sctp_clog.x.rto.rtt = net->rtt / 1000;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_RTT,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_strm_del_alt(struct sctp_tcb *stcb, uint32_t tsn, uint16_t sseq, uint16_t stream, int from)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.strlog.stcb = stcb;
sctp_clog.x.strlog.n_tsn = tsn;
sctp_clog.x.strlog.n_sseq = sseq;
sctp_clog.x.strlog.e_tsn = 0;
sctp_clog.x.strlog.e_sseq = 0;
sctp_clog.x.strlog.strm = stream;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_STRM,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_nagle_event(struct sctp_tcb *stcb, int action)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.nagle.stcb = (void *)stcb;
sctp_clog.x.nagle.total_flight = stcb->asoc.total_flight;
sctp_clog.x.nagle.total_in_queue = stcb->asoc.total_output_queue_size;
sctp_clog.x.nagle.count_in_queue = stcb->asoc.chunks_on_out_queue;
sctp_clog.x.nagle.count_in_flight = stcb->asoc.total_flight_count;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_NAGLE,
action,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_sack(uint32_t old_cumack, uint32_t cumack, uint32_t tsn, uint16_t gaps, uint16_t dups, int from)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.sack.cumack = cumack;
sctp_clog.x.sack.oldcumack = old_cumack;
sctp_clog.x.sack.tsn = tsn;
sctp_clog.x.sack.numGaps = gaps;
sctp_clog.x.sack.numDups = dups;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_SACK,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_map(uint32_t map, uint32_t cum, uint32_t high, int from)
{
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.map.base = map;
sctp_clog.x.map.cum = cum;
sctp_clog.x.map.high = high;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MAP,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_fr(uint32_t biggest_tsn, uint32_t biggest_new_tsn, uint32_t tsn, int from)
{
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.fr.largest_tsn = biggest_tsn;
sctp_clog.x.fr.largest_new_tsn = biggest_new_tsn;
sctp_clog.x.fr.tsn = tsn;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_FR,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_mb(struct mbuf *m, int from)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.mb.mp = m;
sctp_clog.x.mb.mbuf_flags = (uint8_t) (SCTP_BUF_GET_FLAGS(m));
sctp_clog.x.mb.size = (uint16_t) (SCTP_BUF_LEN(m));
sctp_clog.x.mb.data = SCTP_BUF_AT(m, 0);
if (SCTP_BUF_IS_EXTENDED(m)) {
sctp_clog.x.mb.ext = SCTP_BUF_EXTEND_BASE(m);
sctp_clog.x.mb.refcnt = (uint8_t) (SCTP_BUF_EXTEND_REFCNT(m));
} else {
sctp_clog.x.mb.ext = 0;
sctp_clog.x.mb.refcnt = 0;
}
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MBUF,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_strm_del(struct sctp_queued_to_read *control, struct sctp_queued_to_read *poschk, int from)
{
struct sctp_cwnd_log sctp_clog;
if (control == NULL) {
SCTP_PRINTF("Gak log of NULL?\n");
return;
}
sctp_clog.x.strlog.stcb = control->stcb;
sctp_clog.x.strlog.n_tsn = control->sinfo_tsn;
sctp_clog.x.strlog.n_sseq = control->sinfo_ssn;
sctp_clog.x.strlog.strm = control->sinfo_stream;
if (poschk != NULL) {
sctp_clog.x.strlog.e_tsn = poschk->sinfo_tsn;
sctp_clog.x.strlog.e_sseq = poschk->sinfo_ssn;
} else {
sctp_clog.x.strlog.e_tsn = 0;
sctp_clog.x.strlog.e_sseq = 0;
}
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_STRM,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_cwnd(struct sctp_tcb *stcb, struct sctp_nets *net, int augment, uint8_t from)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.cwnd.net = net;
if (stcb->asoc.send_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_send = 255;
else
sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
if (stcb->asoc.stream_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_str = 255;
else
sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
if (net) {
sctp_clog.x.cwnd.cwnd_new_value = net->cwnd;
sctp_clog.x.cwnd.inflight = net->flight_size;
sctp_clog.x.cwnd.pseudo_cumack = net->pseudo_cumack;
sctp_clog.x.cwnd.meets_pseudo_cumack = net->new_pseudo_cumack;
sctp_clog.x.cwnd.need_new_pseudo_cumack = net->find_pseudo_cumack;
}
if (SCTP_CWNDLOG_PRESEND == from) {
sctp_clog.x.cwnd.meets_pseudo_cumack = stcb->asoc.peers_rwnd;
}
sctp_clog.x.cwnd.cwnd_augment = augment;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_CWND,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_lock(struct sctp_inpcb *inp, struct sctp_tcb *stcb, uint8_t from)
{
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
if (inp) {
sctp_clog.x.lock.sock = (void *)inp->sctp_socket;
} else {
sctp_clog.x.lock.sock = (void *)NULL;
}
sctp_clog.x.lock.inp = (void *)inp;
if (stcb) {
sctp_clog.x.lock.tcb_lock = mtx_owned(&stcb->tcb_mtx);
} else {
sctp_clog.x.lock.tcb_lock = SCTP_LOCK_UNKNOWN;
}
if (inp) {
sctp_clog.x.lock.inp_lock = mtx_owned(&inp->inp_mtx);
sctp_clog.x.lock.create_lock = mtx_owned(&inp->inp_create_mtx);
} else {
sctp_clog.x.lock.inp_lock = SCTP_LOCK_UNKNOWN;
sctp_clog.x.lock.create_lock = SCTP_LOCK_UNKNOWN;
}
sctp_clog.x.lock.info_lock = rw_wowned(&SCTP_BASE_INFO(ipi_ep_mtx));
if (inp && (inp->sctp_socket)) {
sctp_clog.x.lock.sock_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
sctp_clog.x.lock.sockrcvbuf_lock = mtx_owned(&(inp->sctp_socket->so_rcv.sb_mtx));
sctp_clog.x.lock.socksndbuf_lock = mtx_owned(&(inp->sctp_socket->so_snd.sb_mtx));
} else {
sctp_clog.x.lock.sock_lock = SCTP_LOCK_UNKNOWN;
sctp_clog.x.lock.sockrcvbuf_lock = SCTP_LOCK_UNKNOWN;
sctp_clog.x.lock.socksndbuf_lock = SCTP_LOCK_UNKNOWN;
}
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_LOCK_EVENT,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_maxburst(struct sctp_tcb *stcb, struct sctp_nets *net, int error, int burst, uint8_t from)
{
struct sctp_cwnd_log sctp_clog;
memset(&sctp_clog, 0, sizeof(sctp_clog));
sctp_clog.x.cwnd.net = net;
sctp_clog.x.cwnd.cwnd_new_value = error;
sctp_clog.x.cwnd.inflight = net->flight_size;
sctp_clog.x.cwnd.cwnd_augment = burst;
if (stcb->asoc.send_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_send = 255;
else
sctp_clog.x.cwnd.cnt_in_send = stcb->asoc.send_queue_cnt;
if (stcb->asoc.stream_queue_cnt > 255)
sctp_clog.x.cwnd.cnt_in_str = 255;
else
sctp_clog.x.cwnd.cnt_in_str = stcb->asoc.stream_queue_cnt;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MAXBURST,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_rwnd(uint8_t from, uint32_t peers_rwnd, uint32_t snd_size, uint32_t overhead)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.rwnd.rwnd = peers_rwnd;
sctp_clog.x.rwnd.send_size = snd_size;
sctp_clog.x.rwnd.overhead = overhead;
sctp_clog.x.rwnd.new_rwnd = 0;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_RWND,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_rwnd_set(uint8_t from, uint32_t peers_rwnd, uint32_t flight_size, uint32_t overhead, uint32_t a_rwndval)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.rwnd.rwnd = peers_rwnd;
sctp_clog.x.rwnd.send_size = flight_size;
sctp_clog.x.rwnd.overhead = overhead;
sctp_clog.x.rwnd.new_rwnd = a_rwndval;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_RWND,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_mbcnt(uint8_t from, uint32_t total_oq, uint32_t book, uint32_t total_mbcnt_q, uint32_t mbcnt)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.mbcnt.total_queue_size = total_oq;
sctp_clog.x.mbcnt.size_change = book;
sctp_clog.x.mbcnt.total_queue_mb_size = total_mbcnt_q;
sctp_clog.x.mbcnt.mbcnt_change = mbcnt;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_MBCNT,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_misc_ints(uint8_t from, uint32_t a, uint32_t b, uint32_t c, uint32_t d)
{
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_MISC_EVENT,
from,
a, b, c, d);
}
void
sctp_wakeup_log(struct sctp_tcb *stcb, uint32_t wake_cnt, int from)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.wake.stcb = (void *)stcb;
sctp_clog.x.wake.wake_cnt = wake_cnt;
sctp_clog.x.wake.flight = stcb->asoc.total_flight_count;
sctp_clog.x.wake.send_q = stcb->asoc.send_queue_cnt;
sctp_clog.x.wake.sent_q = stcb->asoc.sent_queue_cnt;
if (stcb->asoc.stream_queue_cnt < 0xff)
sctp_clog.x.wake.stream_qcnt = (uint8_t) stcb->asoc.stream_queue_cnt;
else
sctp_clog.x.wake.stream_qcnt = 0xff;
if (stcb->asoc.chunks_on_out_queue < 0xff)
sctp_clog.x.wake.chunks_on_oque = (uint8_t) stcb->asoc.chunks_on_out_queue;
else
sctp_clog.x.wake.chunks_on_oque = 0xff;
sctp_clog.x.wake.sctpflags = 0;
/* set in the defered mode stuff */
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_DONT_WAKE)
sctp_clog.x.wake.sctpflags |= 1;
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEOUTPUT)
sctp_clog.x.wake.sctpflags |= 2;
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_WAKEINPUT)
sctp_clog.x.wake.sctpflags |= 4;
/* what about the sb */
if (stcb->sctp_socket) {
struct socket *so = stcb->sctp_socket;
sctp_clog.x.wake.sbflags = (uint8_t) ((so->so_snd.sb_flags & 0x00ff));
} else {
sctp_clog.x.wake.sbflags = 0xff;
}
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_WAKE,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
void
sctp_log_block(uint8_t from, struct sctp_association *asoc, int sendlen)
{
struct sctp_cwnd_log sctp_clog;
sctp_clog.x.blk.onsb = asoc->total_output_queue_size;
sctp_clog.x.blk.send_sent_qcnt = (uint16_t) (asoc->send_queue_cnt + asoc->sent_queue_cnt);
sctp_clog.x.blk.peer_rwnd = asoc->peers_rwnd;
sctp_clog.x.blk.stream_qcnt = (uint16_t) asoc->stream_queue_cnt;
sctp_clog.x.blk.chunks_on_oque = (uint16_t) asoc->chunks_on_out_queue;
sctp_clog.x.blk.flight_size = (uint16_t) (asoc->total_flight / 1024);
sctp_clog.x.blk.sndlen = sendlen;
SCTP_CTR6(KTR_SCTP, "SCTP:%d[%d]:%x-%x-%x-%x",
SCTP_LOG_EVENT_BLOCK,
from,
sctp_clog.x.misc.log1,
sctp_clog.x.misc.log2,
sctp_clog.x.misc.log3,
sctp_clog.x.misc.log4);
}
int
sctp_fill_stat_log(void *optval SCTP_UNUSED, size_t *optsize SCTP_UNUSED)
{
/* May need to fix this if ktrdump does not work */
return (0);
}
#ifdef SCTP_AUDITING_ENABLED
uint8_t sctp_audit_data[SCTP_AUDIT_SIZE][2];
static int sctp_audit_indx = 0;
static
void
sctp_print_audit_report(void)
{
int i;
int cnt;
cnt = 0;
for (i = sctp_audit_indx; i < SCTP_AUDIT_SIZE; i++) {
if ((sctp_audit_data[i][0] == 0xe0) &&
(sctp_audit_data[i][1] == 0x01)) {
cnt = 0;
SCTP_PRINTF("\n");
} else if (sctp_audit_data[i][0] == 0xf0) {
cnt = 0;
SCTP_PRINTF("\n");
} else if ((sctp_audit_data[i][0] == 0xc0) &&
(sctp_audit_data[i][1] == 0x01)) {
SCTP_PRINTF("\n");
cnt = 0;
}
SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
(uint32_t) sctp_audit_data[i][1]);
cnt++;
if ((cnt % 14) == 0)
SCTP_PRINTF("\n");
}
for (i = 0; i < sctp_audit_indx; i++) {
if ((sctp_audit_data[i][0] == 0xe0) &&
(sctp_audit_data[i][1] == 0x01)) {
cnt = 0;
SCTP_PRINTF("\n");
} else if (sctp_audit_data[i][0] == 0xf0) {
cnt = 0;
SCTP_PRINTF("\n");
} else if ((sctp_audit_data[i][0] == 0xc0) &&
(sctp_audit_data[i][1] == 0x01)) {
SCTP_PRINTF("\n");
cnt = 0;
}
SCTP_PRINTF("%2.2x%2.2x ", (uint32_t) sctp_audit_data[i][0],
(uint32_t) sctp_audit_data[i][1]);
cnt++;
if ((cnt % 14) == 0)
SCTP_PRINTF("\n");
}
SCTP_PRINTF("\n");
}
void
sctp_auditing(int from, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_nets *net)
{
int resend_cnt, tot_out, rep, tot_book_cnt;
struct sctp_nets *lnet;
struct sctp_tmit_chunk *chk;
sctp_audit_data[sctp_audit_indx][0] = 0xAA;
sctp_audit_data[sctp_audit_indx][1] = 0x000000ff & from;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
if (inp == NULL) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0x01;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
return;
}
if (stcb == NULL) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0x02;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
return;
}
sctp_audit_data[sctp_audit_indx][0] = 0xA1;
sctp_audit_data[sctp_audit_indx][1] =
(0x000000ff & stcb->asoc.sent_queue_retran_cnt);
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 0;
tot_book_cnt = 0;
resend_cnt = tot_out = 0;
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
if (chk->sent == SCTP_DATAGRAM_RESEND) {
resend_cnt++;
} else if (chk->sent < SCTP_DATAGRAM_RESEND) {
tot_out += chk->book_size;
tot_book_cnt++;
}
}
if (resend_cnt != stcb->asoc.sent_queue_retran_cnt) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA1;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
SCTP_PRINTF("resend_cnt:%d asoc-tot:%d\n",
resend_cnt, stcb->asoc.sent_queue_retran_cnt);
rep = 1;
stcb->asoc.sent_queue_retran_cnt = resend_cnt;
sctp_audit_data[sctp_audit_indx][0] = 0xA2;
sctp_audit_data[sctp_audit_indx][1] =
(0x000000ff & stcb->asoc.sent_queue_retran_cnt);
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
}
if (tot_out != stcb->asoc.total_flight) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA2;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 1;
SCTP_PRINTF("tot_flt:%d asoc_tot:%d\n", tot_out,
(int)stcb->asoc.total_flight);
stcb->asoc.total_flight = tot_out;
}
if (tot_book_cnt != stcb->asoc.total_flight_count) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA5;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 1;
SCTP_PRINTF("tot_flt_book:%d\n", tot_book_cnt);
stcb->asoc.total_flight_count = tot_book_cnt;
}
tot_out = 0;
TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
tot_out += lnet->flight_size;
}
if (tot_out != stcb->asoc.total_flight) {
sctp_audit_data[sctp_audit_indx][0] = 0xAF;
sctp_audit_data[sctp_audit_indx][1] = 0xA3;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
rep = 1;
SCTP_PRINTF("real flight:%d net total was %d\n",
stcb->asoc.total_flight, tot_out);
/* now corrective action */
TAILQ_FOREACH(lnet, &stcb->asoc.nets, sctp_next) {
tot_out = 0;
TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) {
if ((chk->whoTo == lnet) &&
(chk->sent < SCTP_DATAGRAM_RESEND)) {
tot_out += chk->book_size;
}
}
if (lnet->flight_size != tot_out) {
SCTP_PRINTF("net:%p flight was %d corrected to %d\n",
(void *)lnet, lnet->flight_size,
tot_out);
lnet->flight_size = tot_out;
}
}
}
if (rep) {
sctp_print_audit_report();
}
}
void
sctp_audit_log(uint8_t ev, uint8_t fd)
{
sctp_audit_data[sctp_audit_indx][0] = ev;
sctp_audit_data[sctp_audit_indx][1] = fd;
sctp_audit_indx++;
if (sctp_audit_indx >= SCTP_AUDIT_SIZE) {
sctp_audit_indx = 0;
}
}
#endif
/*
* sctp_stop_timers_for_shutdown() should be called
* when entering the SHUTDOWN_SENT or SHUTDOWN_ACK_SENT
* state to make sure that all timers are stopped.
*/
void
sctp_stop_timers_for_shutdown(struct sctp_tcb *stcb)
{
struct sctp_association *asoc;
struct sctp_nets *net;
asoc = &stcb->asoc;
(void)SCTP_OS_TIMER_STOP(&asoc->dack_timer.timer);
(void)SCTP_OS_TIMER_STOP(&asoc->strreset_timer.timer);
(void)SCTP_OS_TIMER_STOP(&asoc->asconf_timer.timer);
(void)SCTP_OS_TIMER_STOP(&asoc->autoclose_timer.timer);
(void)SCTP_OS_TIMER_STOP(&asoc->delayed_event_timer.timer);
TAILQ_FOREACH(net, &asoc->nets, sctp_next) {
(void)SCTP_OS_TIMER_STOP(&net->pmtu_timer.timer);
(void)SCTP_OS_TIMER_STOP(&net->hb_timer.timer);
}
}
/*
* a list of sizes based on typical mtu's, used only if next hop size not
* returned.
*/
static uint32_t sctp_mtu_sizes[] = {
68,
296,
508,
512,
544,
576,
1006,
1492,
1500,
1536,
2002,
2048,
4352,
4464,
8166,
17914,
32000,
65535
};
/*
* Return the largest MTU smaller than val. If there is no
* entry, just return val.
*/
uint32_t
sctp_get_prev_mtu(uint32_t val)
{
uint32_t i;
if (val <= sctp_mtu_sizes[0]) {
return (val);
}
for (i = 1; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
if (val <= sctp_mtu_sizes[i]) {
break;
}
}
return (sctp_mtu_sizes[i - 1]);
}
/*
* Return the smallest MTU larger than val. If there is no
* entry, just return val.
*/
uint32_t
sctp_get_next_mtu(uint32_t val)
{
/* select another MTU that is just bigger than this one */
uint32_t i;
for (i = 0; i < (sizeof(sctp_mtu_sizes) / sizeof(uint32_t)); i++) {
if (val < sctp_mtu_sizes[i]) {
return (sctp_mtu_sizes[i]);
}
}
return (val);
}
void
sctp_fill_random_store(struct sctp_pcb *m)
{
/*
* Here we use the MD5/SHA-1 to hash with our good randomNumbers and
* our counter. The result becomes our good random numbers and we
* then setup to give these out. Note that we do no locking to
* protect this. This is ok, since if competing folks call this we
* will get more gobbled gook in the random store which is what we
* want. There is a danger that two guys will use the same random
* numbers, but thats ok too since that is random as well :->
*/
m->store_at = 0;
(void)sctp_hmac(SCTP_HMAC, (uint8_t *) m->random_numbers,
sizeof(m->random_numbers), (uint8_t *) & m->random_counter,
sizeof(m->random_counter), (uint8_t *) m->random_store);
m->random_counter++;
}
uint32_t
sctp_select_initial_TSN(struct sctp_pcb *inp)
{
/*
* A true implementation should use random selection process to get
* the initial stream sequence number, using RFC1750 as a good
* guideline
*/
uint32_t x, *xp;
uint8_t *p;
int store_at, new_store;
if (inp->initial_sequence_debug != 0) {
uint32_t ret;
ret = inp->initial_sequence_debug;
inp->initial_sequence_debug++;
return (ret);
}
retry:
store_at = inp->store_at;
new_store = store_at + sizeof(uint32_t);
if (new_store >= (SCTP_SIGNATURE_SIZE - 3)) {
new_store = 0;
}
if (!atomic_cmpset_int(&inp->store_at, store_at, new_store)) {
goto retry;
}
if (new_store == 0) {
/* Refill the random store */
sctp_fill_random_store(inp);
}
p = &inp->random_store[store_at];
xp = (uint32_t *) p;
x = *xp;
return (x);
}
uint32_t
sctp_select_a_tag(struct sctp_inpcb *inp, uint16_t lport, uint16_t rport, int check)
{
uint32_t x;
struct timeval now;
if (check) {
(void)SCTP_GETTIME_TIMEVAL(&now);
}
for (;;) {
x = sctp_select_initial_TSN(&inp->sctp_ep);
if (x == 0) {
/* we never use 0 */
continue;
}
if (!check || sctp_is_vtag_good(x, lport, rport, &now)) {
break;
}
}
return (x);
}
int
sctp_init_asoc(struct sctp_inpcb *m, struct sctp_tcb *stcb,
uint32_t override_tag, uint32_t vrf_id)
{
struct sctp_association *asoc;
/*
* Anything set to zero is taken care of by the allocation routine's
* bzero
*/
/*
* Up front select what scoping to apply on addresses I tell my peer
* Not sure what to do with these right now, we will need to come up
* with a way to set them. We may need to pass them through from the
* caller in the sctp_aloc_assoc() function.
*/
int i;
asoc = &stcb->asoc;
/* init all variables to a known value. */
SCTP_SET_STATE(&stcb->asoc, SCTP_STATE_INUSE);
asoc->max_burst = m->sctp_ep.max_burst;
asoc->fr_max_burst = m->sctp_ep.fr_max_burst;
asoc->heart_beat_delay = TICKS_TO_MSEC(m->sctp_ep.sctp_timeoutticks[SCTP_TIMER_HEARTBEAT]);
asoc->cookie_life = m->sctp_ep.def_cookie_life;
asoc->sctp_cmt_on_off = m->sctp_cmt_on_off;
asoc->ecn_allowed = m->sctp_ecn_enable;
asoc->sctp_nr_sack_on_off = (uint8_t) SCTP_BASE_SYSCTL(sctp_nr_sack_on_off);
asoc->sctp_cmt_pf = (uint8_t) 0;
asoc->sctp_frag_point = m->sctp_frag_point;
asoc->sctp_features = m->sctp_features;
asoc->default_dscp = m->sctp_ep.default_dscp;
#ifdef INET6
if (m->sctp_ep.default_flowlabel) {
asoc->default_flowlabel = m->sctp_ep.default_flowlabel;
} else {
if (m->ip_inp.inp.inp_flags & IN6P_AUTOFLOWLABEL) {
asoc->default_flowlabel = sctp_select_initial_TSN(&m->sctp_ep);
asoc->default_flowlabel &= 0x000fffff;
asoc->default_flowlabel |= 0x80000000;
} else {
asoc->default_flowlabel = 0;
}
}
#endif
asoc->sb_send_resv = 0;
if (override_tag) {
asoc->my_vtag = override_tag;
} else {
asoc->my_vtag = sctp_select_a_tag(m, stcb->sctp_ep->sctp_lport, stcb->rport, 1);
}
/* Get the nonce tags */
asoc->my_vtag_nonce = sctp_select_a_tag(m, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
asoc->peer_vtag_nonce = sctp_select_a_tag(m, stcb->sctp_ep->sctp_lport, stcb->rport, 0);
asoc->vrf_id = vrf_id;
#ifdef SCTP_ASOCLOG_OF_TSNS
asoc->tsn_in_at = 0;
asoc->tsn_out_at = 0;
asoc->tsn_in_wrapped = 0;
asoc->tsn_out_wrapped = 0;
asoc->cumack_log_at = 0;
asoc->cumack_log_atsnt = 0;
#endif
#ifdef SCTP_FS_SPEC_LOG
asoc->fs_index = 0;
#endif
asoc->refcnt = 0;
asoc->assoc_up_sent = 0;
asoc->asconf_seq_out = asoc->str_reset_seq_out = asoc->init_seq_number = asoc->sending_seq =
sctp_select_initial_TSN(&m->sctp_ep);
asoc->asconf_seq_out_acked = asoc->asconf_seq_out - 1;
/* we are optimisitic here */
asoc->peer_supports_pktdrop = 1;
asoc->peer_supports_nat = 0;
asoc->sent_queue_retran_cnt = 0;
/* for CMT */
asoc->last_net_cmt_send_started = NULL;
/* This will need to be adjusted */
asoc->last_acked_seq = asoc->init_seq_number - 1;
asoc->advanced_peer_ack_point = asoc->last_acked_seq;
asoc->asconf_seq_in = asoc->last_acked_seq;
/* here we are different, we hold the next one we expect */
asoc->str_reset_seq_in = asoc->last_acked_seq + 1;
asoc->initial_init_rto_max = m->sctp_ep.initial_init_rto_max;
asoc->initial_rto = m->sctp_ep.initial_rto;
asoc->max_init_times = m->sctp_ep.max_init_times;
asoc->max_send_times = m->sctp_ep.max_send_times;
asoc->def_net_failure = m->sctp_ep.def_net_failure;
asoc->def_net_pf_threshold = m->sctp_ep.def_net_pf_threshold;
asoc->free_chunk_cnt = 0;
asoc->iam_blocking = 0;
asoc->context = m->sctp_context;
asoc->local_strreset_support = m->local_strreset_support;
asoc->def_send = m->def_send;
asoc->delayed_ack = TICKS_TO_MSEC(m->sctp_ep.sctp_timeoutticks[SCTP_TIMER_RECV]);
asoc->sack_freq = m->sctp_ep.sctp_sack_freq;
asoc->pr_sctp_cnt = 0;
asoc->total_output_queue_size = 0;
if (m->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
struct in6pcb *inp6;
/* Its a V6 socket */
inp6 = (struct in6pcb *)m;
asoc->ipv6_addr_legal = 1;
/* Now look at the binding flag to see if V4 will be legal */
if (SCTP_IPV6_V6ONLY(inp6) == 0) {
asoc->ipv4_addr_legal = 1;
} else {
/* V4 addresses are NOT legal on the association */
asoc->ipv4_addr_legal = 0;
}
} else {
/* Its a V4 socket, no - V6 */
asoc->ipv4_addr_legal = 1;
asoc->ipv6_addr_legal = 0;
}
asoc->my_rwnd = max(SCTP_SB_LIMIT_RCV(m->sctp_socket), SCTP_MINIMAL_RWND);
asoc->peers_rwnd = SCTP_SB_LIMIT_RCV(m->sctp_socket);
asoc->smallest_mtu = m->sctp_frag_point;
asoc->minrto = m->sctp_ep.sctp_minrto;
asoc->maxrto = m->sctp_ep.sctp_maxrto;
asoc->locked_on_sending = NULL;
asoc->stream_locked_on = 0;
asoc->ecn_echo_cnt_onq = 0;
asoc->stream_locked = 0;
asoc->send_sack = 1;
LIST_INIT(&asoc->sctp_restricted_addrs);
TAILQ_INIT(&asoc->nets);
TAILQ_INIT(&asoc->pending_reply_queue);
TAILQ_INIT(&asoc->asconf_ack_sent);
/* Setup to fill the hb random cache at first HB */
asoc->hb_random_idx = 4;
asoc->sctp_autoclose_ticks = m->sctp_ep.auto_close_time;
stcb->asoc.congestion_control_module = m->sctp_ep.sctp_default_cc_module;
stcb->asoc.cc_functions = sctp_cc_functions[m->sctp_ep.sctp_default_cc_module];
stcb->asoc.stream_scheduling_module = m->sctp_ep.sctp_default_ss_module;
stcb->asoc.ss_functions = sctp_ss_functions[m->sctp_ep.sctp_default_ss_module];
/*
* Now the stream parameters, here we allocate space for all streams
* that we request by default.
*/
asoc->strm_realoutsize = asoc->streamoutcnt = asoc->pre_open_streams =
m->sctp_ep.pre_open_stream_count;
SCTP_MALLOC(asoc->strmout, struct sctp_stream_out *,
asoc->streamoutcnt * sizeof(struct sctp_stream_out),
SCTP_M_STRMO);
if (asoc->strmout == NULL) {
/* big trouble no memory */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
for (i = 0; i < asoc->streamoutcnt; i++) {
/*
* inbound side must be set to 0xffff, also NOTE when we get
* the INIT-ACK back (for INIT sender) we MUST reduce the
* count (streamoutcnt) but first check if we sent to any of
* the upper streams that were dropped (if some were). Those
* that were dropped must be notified to the upper layer as
* failed to send.
*/
asoc->strmout[i].next_sequence_sent = 0x0;
TAILQ_INIT(&asoc->strmout[i].outqueue);
asoc->strmout[i].stream_no = i;
asoc->strmout[i].last_msg_incomplete = 0;
asoc->ss_functions.sctp_ss_init_stream(&asoc->strmout[i], NULL);
}
asoc->ss_functions.sctp_ss_init(stcb, asoc, 0);
/* Now the mapping array */
asoc->mapping_array_size = SCTP_INITIAL_MAPPING_ARRAY;
SCTP_MALLOC(asoc->mapping_array, uint8_t *, asoc->mapping_array_size,
SCTP_M_MAP);
if (asoc->mapping_array == NULL) {
SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
memset(asoc->mapping_array, 0, asoc->mapping_array_size);
SCTP_MALLOC(asoc->nr_mapping_array, uint8_t *, asoc->mapping_array_size,
SCTP_M_MAP);
if (asoc->nr_mapping_array == NULL) {
SCTP_FREE(asoc->strmout, SCTP_M_STRMO);
SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
memset(asoc->nr_mapping_array, 0, asoc->mapping_array_size);
/* Now the init of the other outqueues */
TAILQ_INIT(&asoc->free_chunks);
TAILQ_INIT(&asoc->control_send_queue);
TAILQ_INIT(&asoc->asconf_send_queue);
TAILQ_INIT(&asoc->send_queue);
TAILQ_INIT(&asoc->sent_queue);
TAILQ_INIT(&asoc->reasmqueue);
TAILQ_INIT(&asoc->resetHead);
asoc->max_inbound_streams = m->sctp_ep.max_open_streams_intome;
TAILQ_INIT(&asoc->asconf_queue);
/* authentication fields */
asoc->authinfo.random = NULL;
asoc->authinfo.active_keyid = 0;
asoc->authinfo.assoc_key = NULL;
asoc->authinfo.assoc_keyid = 0;
asoc->authinfo.recv_key = NULL;
asoc->authinfo.recv_keyid = 0;
LIST_INIT(&asoc->shared_keys);
asoc->marked_retrans = 0;
asoc->port = m->sctp_ep.port;
asoc->timoinit = 0;
asoc->timodata = 0;
asoc->timosack = 0;
asoc->timoshutdown = 0;
asoc->timoheartbeat = 0;
asoc->timocookie = 0;
asoc->timoshutdownack = 0;
(void)SCTP_GETTIME_TIMEVAL(&asoc->start_time);
asoc->discontinuity_time = asoc->start_time;
/*
* sa_ignore MEMLEAK {memory is put in the assoc mapping array and
* freed later when the association is freed.
*/
return (0);
}
void
sctp_print_mapping_array(struct sctp_association *asoc)
{
unsigned int i, limit;
SCTP_PRINTF("Mapping array size: %d, baseTSN: %8.8x, cumAck: %8.8x, highestTSN: (%8.8x, %8.8x).\n",
asoc->mapping_array_size,
asoc->mapping_array_base_tsn,
asoc->cumulative_tsn,
asoc->highest_tsn_inside_map,
asoc->highest_tsn_inside_nr_map);
for (limit = asoc->mapping_array_size; limit > 1; limit--) {
if (asoc->mapping_array[limit - 1] != 0) {
break;
}
}
SCTP_PRINTF("Renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
for (i = 0; i < limit; i++) {
SCTP_PRINTF("%2.2x%c", asoc->mapping_array[i], ((i + 1) % 16) ? ' ' : '\n');
}
if (limit % 16)
SCTP_PRINTF("\n");
for (limit = asoc->mapping_array_size; limit > 1; limit--) {
if (asoc->nr_mapping_array[limit - 1]) {
break;
}
}
SCTP_PRINTF("Non renegable mapping array (last %d entries are zero):\n", asoc->mapping_array_size - limit);
for (i = 0; i < limit; i++) {
SCTP_PRINTF("%2.2x%c", asoc->nr_mapping_array[i], ((i + 1) % 16) ? ' ' : '\n');
}
if (limit % 16)
SCTP_PRINTF("\n");
}
int
sctp_expand_mapping_array(struct sctp_association *asoc, uint32_t needed)
{
/* mapping array needs to grow */
uint8_t *new_array1, *new_array2;
uint32_t new_size;
new_size = asoc->mapping_array_size + ((needed + 7) / 8 + SCTP_MAPPING_ARRAY_INCR);
SCTP_MALLOC(new_array1, uint8_t *, new_size, SCTP_M_MAP);
SCTP_MALLOC(new_array2, uint8_t *, new_size, SCTP_M_MAP);
if ((new_array1 == NULL) || (new_array2 == NULL)) {
/* can't get more, forget it */
SCTP_PRINTF("No memory for expansion of SCTP mapping array %d\n", new_size);
if (new_array1) {
SCTP_FREE(new_array1, SCTP_M_MAP);
}
if (new_array2) {
SCTP_FREE(new_array2, SCTP_M_MAP);
}
return (-1);
}
memset(new_array1, 0, new_size);
memset(new_array2, 0, new_size);
memcpy(new_array1, asoc->mapping_array, asoc->mapping_array_size);
memcpy(new_array2, asoc->nr_mapping_array, asoc->mapping_array_size);
SCTP_FREE(asoc->mapping_array, SCTP_M_MAP);
SCTP_FREE(asoc->nr_mapping_array, SCTP_M_MAP);
asoc->mapping_array = new_array1;
asoc->nr_mapping_array = new_array2;
asoc->mapping_array_size = new_size;
return (0);
}
static void
sctp_iterator_work(struct sctp_iterator *it)
{
int iteration_count = 0;
int inp_skip = 0;
int first_in = 1;
struct sctp_inpcb *tinp;
SCTP_INP_INFO_RLOCK();
SCTP_ITERATOR_LOCK();
if (it->inp) {
SCTP_INP_RLOCK(it->inp);
SCTP_INP_DECR_REF(it->inp);
}
if (it->inp == NULL) {
/* iterator is complete */
done_with_iterator:
SCTP_ITERATOR_UNLOCK();
SCTP_INP_INFO_RUNLOCK();
if (it->function_atend != NULL) {
(*it->function_atend) (it->pointer, it->val);
}
SCTP_FREE(it, SCTP_M_ITER);
return;
}
select_a_new_ep:
if (first_in) {
first_in = 0;
} else {
SCTP_INP_RLOCK(it->inp);
}
while (((it->pcb_flags) &&
((it->inp->sctp_flags & it->pcb_flags) != it->pcb_flags)) ||
((it->pcb_features) &&
((it->inp->sctp_features & it->pcb_features) != it->pcb_features))) {
/* endpoint flags or features don't match, so keep looking */
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
SCTP_INP_RUNLOCK(it->inp);
goto done_with_iterator;
}
tinp = it->inp;
it->inp = LIST_NEXT(it->inp, sctp_list);
SCTP_INP_RUNLOCK(tinp);
if (it->inp == NULL) {
goto done_with_iterator;
}
SCTP_INP_RLOCK(it->inp);
}
/* now go through each assoc which is in the desired state */
if (it->done_current_ep == 0) {
if (it->function_inp != NULL)
inp_skip = (*it->function_inp) (it->inp, it->pointer, it->val);
it->done_current_ep = 1;
}
if (it->stcb == NULL) {
/* run the per instance function */
it->stcb = LIST_FIRST(&it->inp->sctp_asoc_list);
}
if ((inp_skip) || it->stcb == NULL) {
if (it->function_inp_end != NULL) {
inp_skip = (*it->function_inp_end) (it->inp,
it->pointer,
it->val);
}
SCTP_INP_RUNLOCK(it->inp);
goto no_stcb;
}
while (it->stcb) {
SCTP_TCB_LOCK(it->stcb);
if (it->asoc_state && ((it->stcb->asoc.state & it->asoc_state) != it->asoc_state)) {
/* not in the right state... keep looking */
SCTP_TCB_UNLOCK(it->stcb);
goto next_assoc;
}
/* see if we have limited out the iterator loop */
iteration_count++;
if (iteration_count > SCTP_ITERATOR_MAX_AT_ONCE) {
/* Pause to let others grab the lock */
atomic_add_int(&it->stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(it->stcb);
SCTP_INP_INCR_REF(it->inp);
SCTP_INP_RUNLOCK(it->inp);
SCTP_ITERATOR_UNLOCK();
SCTP_INP_INFO_RUNLOCK();
SCTP_INP_INFO_RLOCK();
SCTP_ITERATOR_LOCK();
if (sctp_it_ctl.iterator_flags) {
/* We won't be staying here */
SCTP_INP_DECR_REF(it->inp);
atomic_add_int(&it->stcb->asoc.refcnt, -1);
if (sctp_it_ctl.iterator_flags &
SCTP_ITERATOR_STOP_CUR_IT) {
sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_IT;
goto done_with_iterator;
}
if (sctp_it_ctl.iterator_flags &
SCTP_ITERATOR_STOP_CUR_INP) {
sctp_it_ctl.iterator_flags &= ~SCTP_ITERATOR_STOP_CUR_INP;
goto no_stcb;
}
/* If we reach here huh? */
SCTP_PRINTF("Unknown it ctl flag %x\n",
sctp_it_ctl.iterator_flags);
sctp_it_ctl.iterator_flags = 0;
}
SCTP_INP_RLOCK(it->inp);
SCTP_INP_DECR_REF(it->inp);
SCTP_TCB_LOCK(it->stcb);
atomic_add_int(&it->stcb->asoc.refcnt, -1);
iteration_count = 0;
}
/* run function on this one */
(*it->function_assoc) (it->inp, it->stcb, it->pointer, it->val);
/*
* we lie here, it really needs to have its own type but
* first I must verify that this won't effect things :-0
*/
if (it->no_chunk_output == 0)
sctp_chunk_output(it->inp, it->stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
SCTP_TCB_UNLOCK(it->stcb);
next_assoc:
it->stcb = LIST_NEXT(it->stcb, sctp_tcblist);
if (it->stcb == NULL) {
/* Run last function */
if (it->function_inp_end != NULL) {
inp_skip = (*it->function_inp_end) (it->inp,
it->pointer,
it->val);
}
}
}
SCTP_INP_RUNLOCK(it->inp);
no_stcb:
/* done with all assocs on this endpoint, move on to next endpoint */
it->done_current_ep = 0;
if (it->iterator_flags & SCTP_ITERATOR_DO_SINGLE_INP) {
it->inp = NULL;
} else {
it->inp = LIST_NEXT(it->inp, sctp_list);
}
if (it->inp == NULL) {
goto done_with_iterator;
}
goto select_a_new_ep;
}
void
sctp_iterator_worker(void)
{
struct sctp_iterator *it, *nit;
/* This function is called with the WQ lock in place */
sctp_it_ctl.iterator_running = 1;
TAILQ_FOREACH_SAFE(it, &sctp_it_ctl.iteratorhead, sctp_nxt_itr, nit) {
sctp_it_ctl.cur_it = it;
/* now lets work on this one */
TAILQ_REMOVE(&sctp_it_ctl.iteratorhead, it, sctp_nxt_itr);
SCTP_IPI_ITERATOR_WQ_UNLOCK();
CURVNET_SET(it->vn);
sctp_iterator_work(it);
sctp_it_ctl.cur_it = NULL;
CURVNET_RESTORE();
SCTP_IPI_ITERATOR_WQ_LOCK();
/* sa_ignore FREED_MEMORY */
}
sctp_it_ctl.iterator_running = 0;
return;
}
static void
sctp_handle_addr_wq(void)
{
/* deal with the ADDR wq from the rtsock calls */
struct sctp_laddr *wi, *nwi;
struct sctp_asconf_iterator *asc;
SCTP_MALLOC(asc, struct sctp_asconf_iterator *,
sizeof(struct sctp_asconf_iterator), SCTP_M_ASC_IT);
if (asc == NULL) {
/* Try later, no memory */
sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
(struct sctp_inpcb *)NULL,
(struct sctp_tcb *)NULL,
(struct sctp_nets *)NULL);
return;
}
LIST_INIT(&asc->list_of_work);
asc->cnt = 0;
SCTP_WQ_ADDR_LOCK();
LIST_FOREACH_SAFE(wi, &SCTP_BASE_INFO(addr_wq), sctp_nxt_addr, nwi) {
LIST_REMOVE(wi, sctp_nxt_addr);
LIST_INSERT_HEAD(&asc->list_of_work, wi, sctp_nxt_addr);
asc->cnt++;
}
SCTP_WQ_ADDR_UNLOCK();
if (asc->cnt == 0) {
SCTP_FREE(asc, SCTP_M_ASC_IT);
} else {
(void)sctp_initiate_iterator(sctp_asconf_iterator_ep,
sctp_asconf_iterator_stcb,
NULL, /* No ep end for boundall */
SCTP_PCB_FLAGS_BOUNDALL,
SCTP_PCB_ANY_FEATURES,
SCTP_ASOC_ANY_STATE,
(void *)asc, 0,
sctp_asconf_iterator_end, NULL, 0);
}
}
void
sctp_timeout_handler(void *t)
{
struct sctp_inpcb *inp;
struct sctp_tcb *stcb;
struct sctp_nets *net;
struct sctp_timer *tmr;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
int did_output, type;
tmr = (struct sctp_timer *)t;
inp = (struct sctp_inpcb *)tmr->ep;
stcb = (struct sctp_tcb *)tmr->tcb;
net = (struct sctp_nets *)tmr->net;
CURVNET_SET((struct vnet *)tmr->vnet);
did_output = 1;
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xF0, (uint8_t) tmr->type);
sctp_auditing(3, inp, stcb, net);
#endif
/* sanity checks... */
if (tmr->self != (void *)tmr) {
/*
* SCTP_PRINTF("Stale SCTP timer fired (%p), ignoring...\n",
* (void *)tmr);
*/
CURVNET_RESTORE();
return;
}
tmr->stopped_from = 0xa001;
if (!SCTP_IS_TIMER_TYPE_VALID(tmr->type)) {
/*
* SCTP_PRINTF("SCTP timer fired with invalid type: 0x%x\n",
* tmr->type);
*/
CURVNET_RESTORE();
return;
}
tmr->stopped_from = 0xa002;
if ((tmr->type != SCTP_TIMER_TYPE_ADDR_WQ) && (inp == NULL)) {
CURVNET_RESTORE();
return;
}
/* if this is an iterator timeout, get the struct and clear inp */
tmr->stopped_from = 0xa003;
type = tmr->type;
if (inp) {
SCTP_INP_INCR_REF(inp);
if ((inp->sctp_socket == NULL) &&
((tmr->type != SCTP_TIMER_TYPE_INPKILL) &&
(tmr->type != SCTP_TIMER_TYPE_INIT) &&
(tmr->type != SCTP_TIMER_TYPE_SEND) &&
(tmr->type != SCTP_TIMER_TYPE_RECV) &&
(tmr->type != SCTP_TIMER_TYPE_HEARTBEAT) &&
(tmr->type != SCTP_TIMER_TYPE_SHUTDOWN) &&
(tmr->type != SCTP_TIMER_TYPE_SHUTDOWNACK) &&
(tmr->type != SCTP_TIMER_TYPE_SHUTDOWNGUARD) &&
(tmr->type != SCTP_TIMER_TYPE_ASOCKILL))
) {
SCTP_INP_DECR_REF(inp);
CURVNET_RESTORE();
return;
}
}
tmr->stopped_from = 0xa004;
if (stcb) {
atomic_add_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state == 0) {
atomic_add_int(&stcb->asoc.refcnt, -1);
if (inp) {
SCTP_INP_DECR_REF(inp);
}
CURVNET_RESTORE();
return;
}
}
tmr->stopped_from = 0xa005;
SCTPDBG(SCTP_DEBUG_TIMER1, "Timer type %d goes off\n", tmr->type);
if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
if (inp) {
SCTP_INP_DECR_REF(inp);
}
if (stcb) {
atomic_add_int(&stcb->asoc.refcnt, -1);
}
CURVNET_RESTORE();
return;
}
tmr->stopped_from = 0xa006;
if (stcb) {
SCTP_TCB_LOCK(stcb);
atomic_add_int(&stcb->asoc.refcnt, -1);
if ((tmr->type != SCTP_TIMER_TYPE_ASOCKILL) &&
((stcb->asoc.state == 0) ||
(stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED))) {
SCTP_TCB_UNLOCK(stcb);
if (inp) {
SCTP_INP_DECR_REF(inp);
}
CURVNET_RESTORE();
return;
}
}
/* record in stopped what t-o occured */
tmr->stopped_from = tmr->type;
/* mark as being serviced now */
if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
/*
* Callout has been rescheduled.
*/
goto get_out;
}
if (!SCTP_OS_TIMER_ACTIVE(&tmr->timer)) {
/*
* Not active, so no action.
*/
goto get_out;
}
SCTP_OS_TIMER_DEACTIVATE(&tmr->timer);
/* call the handler for the appropriate timer type */
switch (tmr->type) {
case SCTP_TIMER_TYPE_ZERO_COPY:
if (inp == NULL) {
break;
}
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
SCTP_ZERO_COPY_EVENT(inp, inp->sctp_socket);
}
break;
case SCTP_TIMER_TYPE_ZCOPY_SENDQ:
if (inp == NULL) {
break;
}
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
SCTP_ZERO_COPY_SENDQ_EVENT(inp, inp->sctp_socket);
}
break;
case SCTP_TIMER_TYPE_ADDR_WQ:
sctp_handle_addr_wq();
break;
case SCTP_TIMER_TYPE_SEND:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timodata);
stcb->asoc.timodata++;
stcb->asoc.num_send_timers_up--;
if (stcb->asoc.num_send_timers_up < 0) {
stcb->asoc.num_send_timers_up = 0;
}
SCTP_TCB_LOCK_ASSERT(stcb);
if (sctp_t3rxt_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_TCB_LOCK_ASSERT(stcb);
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
if ((stcb->asoc.num_send_timers_up == 0) &&
(stcb->asoc.sent_queue_cnt > 0)) {
struct sctp_tmit_chunk *chk;
/*
* safeguard. If there on some on the sent queue
* somewhere but no timers running something is
* wrong... so we start a timer on the first chunk
* on the send queue on whatever net it is sent to.
*/
chk = TAILQ_FIRST(&stcb->asoc.sent_queue);
sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb,
chk->whoTo);
}
break;
case SCTP_TIMER_TYPE_INIT:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timoinit);
stcb->asoc.timoinit++;
if (sctp_t1init_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
/* We do output but not here */
did_output = 0;
break;
case SCTP_TIMER_TYPE_RECV:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timosack);
stcb->asoc.timosack++;
sctp_send_sack(stcb, SCTP_SO_NOT_LOCKED);
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SACK_TMR, SCTP_SO_NOT_LOCKED);
break;
case SCTP_TIMER_TYPE_SHUTDOWN:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
if (sctp_shutdown_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_STAT_INCR(sctps_timoshutdown);
stcb->asoc.timoshutdown++;
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_TMR, SCTP_SO_NOT_LOCKED);
break;
case SCTP_TIMER_TYPE_HEARTBEAT:
if ((stcb == NULL) || (inp == NULL) || (net == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timoheartbeat);
stcb->asoc.timoheartbeat++;
if (sctp_heartbeat_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
if (!(net->dest_state & SCTP_ADDR_NOHB)) {
sctp_timer_start(SCTP_TIMER_TYPE_HEARTBEAT, inp, stcb, net);
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_HB_TMR, SCTP_SO_NOT_LOCKED);
}
break;
case SCTP_TIMER_TYPE_COOKIE:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
if (sctp_cookie_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_STAT_INCR(sctps_timocookie);
stcb->asoc.timocookie++;
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
/*
* We consider T3 and Cookie timer pretty much the same with
* respect to where from in chunk_output.
*/
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_T3, SCTP_SO_NOT_LOCKED);
break;
case SCTP_TIMER_TYPE_NEWCOOKIE:
{
struct timeval tv;
int i, secret;
if (inp == NULL) {
break;
}
SCTP_STAT_INCR(sctps_timosecret);
(void)SCTP_GETTIME_TIMEVAL(&tv);
SCTP_INP_WLOCK(inp);
inp->sctp_ep.time_of_secret_change = tv.tv_sec;
inp->sctp_ep.last_secret_number =
inp->sctp_ep.current_secret_number;
inp->sctp_ep.current_secret_number++;
if (inp->sctp_ep.current_secret_number >=
SCTP_HOW_MANY_SECRETS) {
inp->sctp_ep.current_secret_number = 0;
}
secret = (int)inp->sctp_ep.current_secret_number;
for (i = 0; i < SCTP_NUMBER_OF_SECRETS; i++) {
inp->sctp_ep.secret_key[secret][i] =
sctp_select_initial_TSN(&inp->sctp_ep);
}
SCTP_INP_WUNLOCK(inp);
sctp_timer_start(SCTP_TIMER_TYPE_NEWCOOKIE, inp, stcb, net);
}
did_output = 0;
break;
case SCTP_TIMER_TYPE_PATHMTURAISE:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timopathmtu);
sctp_pathmtu_timer(inp, stcb, net);
did_output = 0;
break;
case SCTP_TIMER_TYPE_SHUTDOWNACK:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
if (sctp_shutdownack_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_STAT_INCR(sctps_timoshutdownack);
stcb->asoc.timoshutdownack++;
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_SHUT_ACK_TMR, SCTP_SO_NOT_LOCKED);
break;
case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timoshutdownguard);
sctp_abort_an_association(inp, stcb, NULL, SCTP_SO_NOT_LOCKED);
/* no need to unlock on tcb its gone */
goto out_decr;
case SCTP_TIMER_TYPE_STRRESET:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
if (sctp_strreset_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_STAT_INCR(sctps_timostrmrst);
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_STRRST_TMR, SCTP_SO_NOT_LOCKED);
break;
case SCTP_TIMER_TYPE_ASCONF:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
if (sctp_asconf_timer(inp, stcb, net)) {
/* no need to unlock on tcb its gone */
goto out_decr;
}
SCTP_STAT_INCR(sctps_timoasconf);
#ifdef SCTP_AUDITING_ENABLED
sctp_auditing(4, inp, stcb, net);
#endif
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_ASCONF_TMR, SCTP_SO_NOT_LOCKED);
break;
case SCTP_TIMER_TYPE_PRIM_DELETED:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
sctp_delete_prim_timer(inp, stcb, net);
SCTP_STAT_INCR(sctps_timodelprim);
break;
case SCTP_TIMER_TYPE_AUTOCLOSE:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timoautoclose);
sctp_autoclose_timer(inp, stcb, net);
sctp_chunk_output(inp, stcb, SCTP_OUTPUT_FROM_AUTOCLOSE_TMR, SCTP_SO_NOT_LOCKED);
did_output = 0;
break;
case SCTP_TIMER_TYPE_ASOCKILL:
if ((stcb == NULL) || (inp == NULL)) {
break;
}
SCTP_STAT_INCR(sctps_timoassockill);
/* Can we free it yet? */
SCTP_INP_DECR_REF(inp);
sctp_timer_stop(SCTP_TIMER_TYPE_ASOCKILL, inp, stcb, NULL, SCTP_FROM_SCTPUTIL + SCTP_LOC_1);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(inp);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTPUTIL + SCTP_LOC_2);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
/*
* free asoc, always unlocks (or destroy's) so prevent
* duplicate unlock or unlock of a free mtx :-0
*/
stcb = NULL;
goto out_no_decr;
case SCTP_TIMER_TYPE_INPKILL:
SCTP_STAT_INCR(sctps_timoinpkill);
if (inp == NULL) {
break;
}
/*
* special case, take away our increment since WE are the
* killer
*/
SCTP_INP_DECR_REF(inp);
sctp_timer_stop(SCTP_TIMER_TYPE_INPKILL, inp, NULL, NULL, SCTP_FROM_SCTPUTIL + SCTP_LOC_3);
sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
SCTP_CALLED_FROM_INPKILL_TIMER);
inp = NULL;
goto out_no_decr;
default:
SCTPDBG(SCTP_DEBUG_TIMER1, "sctp_timeout_handler:unknown timer %d\n",
tmr->type);
break;
}
#ifdef SCTP_AUDITING_ENABLED
sctp_audit_log(0xF1, (uint8_t) tmr->type);
if (inp)
sctp_auditing(5, inp, stcb, net);
#endif
if ((did_output) && stcb) {
/*
* Now we need to clean up the control chunk chain if an
* ECNE is on it. It must be marked as UNSENT again so next
* call will continue to send it until such time that we get
* a CWR, to remove it. It is, however, less likely that we
* will find a ecn echo on the chain though.
*/
sctp_fix_ecn_echo(&stcb->asoc);
}
get_out:
if (stcb) {
SCTP_TCB_UNLOCK(stcb);
}
out_decr:
if (inp) {
SCTP_INP_DECR_REF(inp);
}
out_no_decr:
SCTPDBG(SCTP_DEBUG_TIMER1, "Timer now complete (type %d)\n",
type);
CURVNET_RESTORE();
}
void
sctp_timer_start(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_nets *net)
{
uint32_t to_ticks;
struct sctp_timer *tmr;
if ((t_type != SCTP_TIMER_TYPE_ADDR_WQ) && (inp == NULL))
return;
tmr = NULL;
if (stcb) {
SCTP_TCB_LOCK_ASSERT(stcb);
}
switch (t_type) {
case SCTP_TIMER_TYPE_ZERO_COPY:
tmr = &inp->sctp_ep.zero_copy_timer;
to_ticks = SCTP_ZERO_COPY_TICK_DELAY;
break;
case SCTP_TIMER_TYPE_ZCOPY_SENDQ:
tmr = &inp->sctp_ep.zero_copy_sendq_timer;
to_ticks = SCTP_ZERO_COPY_SENDQ_TICK_DELAY;
break;
case SCTP_TIMER_TYPE_ADDR_WQ:
/* Only 1 tick away :-) */
tmr = &SCTP_BASE_INFO(addr_wq_timer);
to_ticks = SCTP_ADDRESS_TICK_DELAY;
break;
case SCTP_TIMER_TYPE_SEND:
/* Here we use the RTO timer */
{
int rto_val;
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->rxt_timer;
if (net->RTO == 0) {
rto_val = stcb->asoc.initial_rto;
} else {
rto_val = net->RTO;
}
to_ticks = MSEC_TO_TICKS(rto_val);
}
break;
case SCTP_TIMER_TYPE_INIT:
/*
* Here we use the INIT timer default usually about 1
* minute.
*/
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->rxt_timer;
if (net->RTO == 0) {
to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
} else {
to_ticks = MSEC_TO_TICKS(net->RTO);
}
break;
case SCTP_TIMER_TYPE_RECV:
/*
* Here we use the Delayed-Ack timer value from the inp
* ususually about 200ms.
*/
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.dack_timer;
to_ticks = MSEC_TO_TICKS(stcb->asoc.delayed_ack);
break;
case SCTP_TIMER_TYPE_SHUTDOWN:
/* Here we use the RTO of the destination. */
if ((stcb == NULL) || (net == NULL)) {
return;
}
if (net->RTO == 0) {
to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
} else {
to_ticks = MSEC_TO_TICKS(net->RTO);
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_HEARTBEAT:
/*
* the net is used here so that we can add in the RTO. Even
* though we use a different timer. We also add the HB timer
* PLUS a random jitter.
*/
if ((inp == NULL) || (stcb == NULL) || (net == NULL)) {
return;
} else {
uint32_t rndval;
uint32_t jitter;
if ((net->dest_state & SCTP_ADDR_NOHB) &&
!(net->dest_state & SCTP_ADDR_UNCONFIRMED)) {
return;
}
if (net->RTO == 0) {
to_ticks = stcb->asoc.initial_rto;
} else {
to_ticks = net->RTO;
}
rndval = sctp_select_initial_TSN(&inp->sctp_ep);
jitter = rndval % to_ticks;
if (jitter >= (to_ticks >> 1)) {
to_ticks = to_ticks + (jitter - (to_ticks >> 1));
} else {
to_ticks = to_ticks - jitter;
}
if (!(net->dest_state & SCTP_ADDR_UNCONFIRMED) &&
!(net->dest_state & SCTP_ADDR_PF)) {
to_ticks += net->heart_beat_delay;
}
/*
* Now we must convert the to_ticks that are now in
* ms to ticks.
*/
to_ticks = MSEC_TO_TICKS(to_ticks);
tmr = &net->hb_timer;
}
break;
case SCTP_TIMER_TYPE_COOKIE:
/*
* Here we can use the RTO timer from the network since one
* RTT was compelete. If a retran happened then we will be
* using the RTO initial value.
*/
if ((stcb == NULL) || (net == NULL)) {
return;
}
if (net->RTO == 0) {
to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
} else {
to_ticks = MSEC_TO_TICKS(net->RTO);
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_NEWCOOKIE:
/*
* nothing needed but the endpoint here ususually about 60
* minutes.
*/
if (inp == NULL) {
return;
}
tmr = &inp->sctp_ep.signature_change;
to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_SIGNATURE];
break;
case SCTP_TIMER_TYPE_ASOCKILL:
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.strreset_timer;
to_ticks = MSEC_TO_TICKS(SCTP_ASOC_KILL_TIMEOUT);
break;
case SCTP_TIMER_TYPE_INPKILL:
/*
* The inp is setup to die. We re-use the signature_chage
* timer since that has stopped and we are in the GONE
* state.
*/
if (inp == NULL) {
return;
}
tmr = &inp->sctp_ep.signature_change;
to_ticks = MSEC_TO_TICKS(SCTP_INP_KILL_TIMEOUT);
break;
case SCTP_TIMER_TYPE_PATHMTURAISE:
/*
* Here we use the value found in the EP for PMTU ususually
* about 10 minutes.
*/
if ((stcb == NULL) || (inp == NULL)) {
return;
}
if (net == NULL) {
return;
}
if (net->dest_state & SCTP_ADDR_NO_PMTUD) {
return;
}
to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_PMTU];
tmr = &net->pmtu_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWNACK:
/* Here we use the RTO of the destination */
if ((stcb == NULL) || (net == NULL)) {
return;
}
if (net->RTO == 0) {
to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
} else {
to_ticks = MSEC_TO_TICKS(net->RTO);
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
/*
* Here we use the endpoints shutdown guard timer usually
* about 3 minutes.
*/
if ((inp == NULL) || (stcb == NULL)) {
return;
}
to_ticks = inp->sctp_ep.sctp_timeoutticks[SCTP_TIMER_MAXSHUTDOWN];
tmr = &stcb->asoc.shut_guard_timer;
break;
case SCTP_TIMER_TYPE_STRRESET:
/*
* Here the timer comes from the stcb but its value is from
* the net's RTO.
*/
if ((stcb == NULL) || (net == NULL)) {
return;
}
if (net->RTO == 0) {
to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
} else {
to_ticks = MSEC_TO_TICKS(net->RTO);
}
tmr = &stcb->asoc.strreset_timer;
break;
case SCTP_TIMER_TYPE_ASCONF:
/*
* Here the timer comes from the stcb but its value is from
* the net's RTO.
*/
if ((stcb == NULL) || (net == NULL)) {
return;
}
if (net->RTO == 0) {
to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
} else {
to_ticks = MSEC_TO_TICKS(net->RTO);
}
tmr = &stcb->asoc.asconf_timer;
break;
case SCTP_TIMER_TYPE_PRIM_DELETED:
if ((stcb == NULL) || (net != NULL)) {
return;
}
to_ticks = MSEC_TO_TICKS(stcb->asoc.initial_rto);
tmr = &stcb->asoc.delete_prim_timer;
break;
case SCTP_TIMER_TYPE_AUTOCLOSE:
if (stcb == NULL) {
return;
}
if (stcb->asoc.sctp_autoclose_ticks == 0) {
/*
* Really an error since stcb is NOT set to
* autoclose
*/
return;
}
to_ticks = stcb->asoc.sctp_autoclose_ticks;
tmr = &stcb->asoc.autoclose_timer;
break;
default:
SCTPDBG(SCTP_DEBUG_TIMER1, "%s: Unknown timer type %d\n",
__FUNCTION__, t_type);
return;
break;
}
if ((to_ticks <= 0) || (tmr == NULL)) {
SCTPDBG(SCTP_DEBUG_TIMER1, "%s: %d:software error to_ticks:%d tmr:%p not set ??\n",
__FUNCTION__, t_type, to_ticks, (void *)tmr);
return;
}
if (SCTP_OS_TIMER_PENDING(&tmr->timer)) {
/*
* we do NOT allow you to have it already running. if it is
* we leave the current one up unchanged
*/
return;
}
/* At this point we can proceed */
if (t_type == SCTP_TIMER_TYPE_SEND) {
stcb->asoc.num_send_timers_up++;
}
tmr->stopped_from = 0;
tmr->type = t_type;
tmr->ep = (void *)inp;
tmr->tcb = (void *)stcb;
tmr->net = (void *)net;
tmr->self = (void *)tmr;
tmr->vnet = (void *)curvnet;
tmr->ticks = sctp_get_tick_count();
(void)SCTP_OS_TIMER_START(&tmr->timer, to_ticks, sctp_timeout_handler, tmr);
return;
}
void
sctp_timer_stop(int t_type, struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct sctp_nets *net, uint32_t from)
{
struct sctp_timer *tmr;
if ((t_type != SCTP_TIMER_TYPE_ADDR_WQ) &&
(inp == NULL))
return;
tmr = NULL;
if (stcb) {
SCTP_TCB_LOCK_ASSERT(stcb);
}
switch (t_type) {
case SCTP_TIMER_TYPE_ZERO_COPY:
tmr = &inp->sctp_ep.zero_copy_timer;
break;
case SCTP_TIMER_TYPE_ZCOPY_SENDQ:
tmr = &inp->sctp_ep.zero_copy_sendq_timer;
break;
case SCTP_TIMER_TYPE_ADDR_WQ:
tmr = &SCTP_BASE_INFO(addr_wq_timer);
break;
case SCTP_TIMER_TYPE_SEND:
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_INIT:
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_RECV:
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.dack_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWN:
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_HEARTBEAT:
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->hb_timer;
break;
case SCTP_TIMER_TYPE_COOKIE:
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_NEWCOOKIE:
/* nothing needed but the endpoint here */
tmr = &inp->sctp_ep.signature_change;
/*
* We re-use the newcookie timer for the INP kill timer. We
* must assure that we do not kill it by accident.
*/
break;
case SCTP_TIMER_TYPE_ASOCKILL:
/*
* Stop the asoc kill timer.
*/
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.strreset_timer;
break;
case SCTP_TIMER_TYPE_INPKILL:
/*
* The inp is setup to die. We re-use the signature_chage
* timer since that has stopped and we are in the GONE
* state.
*/
tmr = &inp->sctp_ep.signature_change;
break;
case SCTP_TIMER_TYPE_PATHMTURAISE:
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->pmtu_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWNACK:
if ((stcb == NULL) || (net == NULL)) {
return;
}
tmr = &net->rxt_timer;
break;
case SCTP_TIMER_TYPE_SHUTDOWNGUARD:
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.shut_guard_timer;
break;
case SCTP_TIMER_TYPE_STRRESET:
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.strreset_timer;
break;
case SCTP_TIMER_TYPE_ASCONF:
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.asconf_timer;
break;
case SCTP_TIMER_TYPE_PRIM_DELETED:
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.delete_prim_timer;
break;
case SCTP_TIMER_TYPE_AUTOCLOSE:
if (stcb == NULL) {
return;
}
tmr = &stcb->asoc.autoclose_timer;
break;
default:
SCTPDBG(SCTP_DEBUG_TIMER1, "%s: Unknown timer type %d\n",
__FUNCTION__, t_type);
break;
}
if (tmr == NULL) {
return;
}
if ((tmr->type != t_type) && tmr->type) {
/*
* Ok we have a timer that is under joint use. Cookie timer
* per chance with the SEND timer. We therefore are NOT
* running the timer that the caller wants stopped. So just
* return.
*/
return;
}
if ((t_type == SCTP_TIMER_TYPE_SEND) && (stcb != NULL)) {
stcb->asoc.num_send_timers_up--;
if (stcb->asoc.num_send_timers_up < 0) {
stcb->asoc.num_send_timers_up = 0;
}
}
tmr->self = NULL;
tmr->stopped_from = from;
(void)SCTP_OS_TIMER_STOP(&tmr->timer);
return;
}
uint32_t
sctp_calculate_len(struct mbuf *m)
{
uint32_t tlen = 0;
struct mbuf *at;
at = m;
while (at) {
tlen += SCTP_BUF_LEN(at);
at = SCTP_BUF_NEXT(at);
}
return (tlen);
}
void
sctp_mtu_size_reset(struct sctp_inpcb *inp,
struct sctp_association *asoc, uint32_t mtu)
{
/*
* Reset the P-MTU size on this association, this involves changing
* the asoc MTU, going through ANY chunk+overhead larger than mtu to
* allow the DF flag to be cleared.
*/
struct sctp_tmit_chunk *chk;
unsigned int eff_mtu, ovh;
asoc->smallest_mtu = mtu;
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
ovh = SCTP_MIN_OVERHEAD;
} else {
ovh = SCTP_MIN_V4_OVERHEAD;
}
eff_mtu = mtu - ovh;
TAILQ_FOREACH(chk, &asoc->send_queue, sctp_next) {
if (chk->send_size > eff_mtu) {
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
}
TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) {
if (chk->send_size > eff_mtu) {
chk->flags |= CHUNK_FLAGS_FRAGMENT_OK;
}
}
}
/*
* given an association and starting time of the current RTT period return
* RTO in number of msecs net should point to the current network
*/
uint32_t
sctp_calculate_rto(struct sctp_tcb *stcb,
struct sctp_association *asoc,
struct sctp_nets *net,
struct timeval *told,
int safe, int rtt_from_sack)
{
/*-
* given an association and the starting time of the current RTT
* period (in value1/value2) return RTO in number of msecs.
*/
int32_t rtt; /* RTT in ms */
uint32_t new_rto;
int first_measure = 0;
struct timeval now, then, *old;
/* Copy it out for sparc64 */
if (safe == sctp_align_unsafe_makecopy) {
old = &then;
memcpy(&then, told, sizeof(struct timeval));
} else if (safe == sctp_align_safe_nocopy) {
old = told;
} else {
/* error */
SCTP_PRINTF("Huh, bad rto calc call\n");
return (0);
}
/************************/
/* 1. calculate new RTT */
/************************/
/* get the current time */
if (stcb->asoc.use_precise_time) {
(void)SCTP_GETPTIME_TIMEVAL(&now);
} else {
(void)SCTP_GETTIME_TIMEVAL(&now);
}
timevalsub(&now, old);
/* store the current RTT in us */
net->rtt = (uint64_t) 1000000 *(uint64_t) now.tv_sec +
(uint64_t) now.tv_usec;
/* computer rtt in ms */
rtt = net->rtt / 1000;
if ((asoc->cc_functions.sctp_rtt_calculated) && (rtt_from_sack == SCTP_RTT_FROM_DATA)) {
/*
* Tell the CC module that a new update has just occurred
* from a sack
*/
(*asoc->cc_functions.sctp_rtt_calculated) (stcb, net, &now);
}
/*
* Do we need to determine the lan? We do this only on sacks i.e.
* RTT being determined from data not non-data (HB/INIT->INITACK).
*/
if ((rtt_from_sack == SCTP_RTT_FROM_DATA) &&
(net->lan_type == SCTP_LAN_UNKNOWN)) {
if (net->rtt > SCTP_LOCAL_LAN_RTT) {
net->lan_type = SCTP_LAN_INTERNET;
} else {
net->lan_type = SCTP_LAN_LOCAL;
}
}
/***************************/
/* 2. update RTTVAR & SRTT */
/***************************/
/*-
* Compute the scaled average lastsa and the
* scaled variance lastsv as described in van Jacobson
* Paper "Congestion Avoidance and Control", Annex A.
*
* (net->lastsa >> SCTP_RTT_SHIFT) is the srtt
* (net->lastsa >> SCTP_RTT_VAR_SHIFT) is the rttvar
*/
if (net->RTO_measured) {
rtt -= (net->lastsa >> SCTP_RTT_SHIFT);
net->lastsa += rtt;
if (rtt < 0) {
rtt = -rtt;
}
rtt -= (net->lastsv >> SCTP_RTT_VAR_SHIFT);
net->lastsv += rtt;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
rto_logging(net, SCTP_LOG_RTTVAR);
}
} else {
/* First RTO measurment */
net->RTO_measured = 1;
first_measure = 1;
net->lastsa = rtt << SCTP_RTT_SHIFT;
net->lastsv = (rtt / 2) << SCTP_RTT_VAR_SHIFT;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RTTVAR_LOGGING_ENABLE) {
rto_logging(net, SCTP_LOG_INITIAL_RTT);
}
}
if (net->lastsv == 0) {
net->lastsv = SCTP_CLOCK_GRANULARITY;
}
new_rto = (net->lastsa >> SCTP_RTT_SHIFT) + net->lastsv;
if ((new_rto > SCTP_SAT_NETWORK_MIN) &&
(stcb->asoc.sat_network_lockout == 0)) {
stcb->asoc.sat_network = 1;
} else if ((!first_measure) && stcb->asoc.sat_network) {
stcb->asoc.sat_network = 0;
stcb->asoc.sat_network_lockout = 1;
}
/* bound it, per C6/C7 in Section 5.3.1 */
if (new_rto < stcb->asoc.minrto) {
new_rto = stcb->asoc.minrto;
}
if (new_rto > stcb->asoc.maxrto) {
new_rto = stcb->asoc.maxrto;
}
/* we are now returning the RTO */
return (new_rto);
}
/*
* return a pointer to a contiguous piece of data from the given mbuf chain
* starting at 'off' for 'len' bytes. If the desired piece spans more than
* one mbuf, a copy is made at 'ptr'. caller must ensure that the buffer size
* is >= 'len' returns NULL if there there isn't 'len' bytes in the chain.
*/
caddr_t
sctp_m_getptr(struct mbuf *m, int off, int len, uint8_t * in_ptr)
{
uint32_t count;
uint8_t *ptr;
ptr = in_ptr;
if ((off < 0) || (len <= 0))
return (NULL);
/* find the desired start location */
while ((m != NULL) && (off > 0)) {
if (off < SCTP_BUF_LEN(m))
break;
off -= SCTP_BUF_LEN(m);
m = SCTP_BUF_NEXT(m);
}
if (m == NULL)
return (NULL);
/* is the current mbuf large enough (eg. contiguous)? */
if ((SCTP_BUF_LEN(m) - off) >= len) {
return (mtod(m, caddr_t)+off);
} else {
/* else, it spans more than one mbuf, so save a temp copy... */
while ((m != NULL) && (len > 0)) {
count = min(SCTP_BUF_LEN(m) - off, len);
bcopy(mtod(m, caddr_t)+off, ptr, count);
len -= count;
ptr += count;
off = 0;
m = SCTP_BUF_NEXT(m);
}
if ((m == NULL) && (len > 0))
return (NULL);
else
return ((caddr_t)in_ptr);
}
}
struct sctp_paramhdr *
sctp_get_next_param(struct mbuf *m,
int offset,
struct sctp_paramhdr *pull,
int pull_limit)
{
/* This just provides a typed signature to Peter's Pull routine */
return ((struct sctp_paramhdr *)sctp_m_getptr(m, offset, pull_limit,
(uint8_t *) pull));
}
int
sctp_add_pad_tombuf(struct mbuf *m, int padlen)
{
/*
* add padlen bytes of 0 filled padding to the end of the mbuf. If
* padlen is > 3 this routine will fail.
*/
uint8_t *dp;
int i;
if (padlen > 3) {
SCTP_LTRACE_ERR_RET_PKT(m, NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
return (ENOBUFS);
}
if (padlen <= M_TRAILINGSPACE(m)) {
/*
* The easy way. We hope the majority of the time we hit
* here :)
*/
dp = (uint8_t *) (mtod(m, caddr_t)+SCTP_BUF_LEN(m));
SCTP_BUF_LEN(m) += padlen;
} else {
/* Hard way we must grow the mbuf */
struct mbuf *tmp;
tmp = sctp_get_mbuf_for_msg(padlen, 0, M_DONTWAIT, 1, MT_DATA);
if (tmp == NULL) {
/* Out of space GAK! we are in big trouble. */
SCTP_LTRACE_ERR_RET_PKT(m, NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
return (ENOBUFS);
}
/* setup and insert in middle */
SCTP_BUF_LEN(tmp) = padlen;
SCTP_BUF_NEXT(tmp) = NULL;
SCTP_BUF_NEXT(m) = tmp;
dp = mtod(tmp, uint8_t *);
}
/* zero out the pad */
for (i = 0; i < padlen; i++) {
*dp = 0;
dp++;
}
return (0);
}
int
sctp_pad_lastmbuf(struct mbuf *m, int padval, struct mbuf *last_mbuf)
{
/* find the last mbuf in chain and pad it */
struct mbuf *m_at;
if (last_mbuf) {
return (sctp_add_pad_tombuf(last_mbuf, padval));
} else {
for (m_at = m; m_at; m_at = SCTP_BUF_NEXT(m_at)) {
if (SCTP_BUF_NEXT(m_at) == NULL) {
return (sctp_add_pad_tombuf(m_at, padval));
}
}
}
SCTP_LTRACE_ERR_RET_PKT(m, NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EFAULT);
return (EFAULT);
}
static void
sctp_notify_assoc_change(uint16_t state, struct sctp_tcb *stcb,
uint16_t error, struct sctp_abort_chunk *abort, uint8_t from_peer, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct mbuf *m_notify;
struct sctp_assoc_change *sac;
struct sctp_queued_to_read *control;
size_t notif_len, abort_len;
unsigned int i;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVASSOCEVNT)) {
notif_len = sizeof(struct sctp_assoc_change);
if (abort != NULL) {
abort_len = htons(abort->ch.chunk_length);
} else {
abort_len = 0;
}
if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
notif_len += SCTP_ASSOC_SUPPORTS_MAX;
} else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
notif_len += abort_len;
}
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* Retry with smaller value. */
notif_len = sizeof(struct sctp_assoc_change);
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL) {
goto set_error;
}
}
SCTP_BUF_NEXT(m_notify) = NULL;
sac = mtod(m_notify, struct sctp_assoc_change *);
sac->sac_type = SCTP_ASSOC_CHANGE;
sac->sac_flags = 0;
sac->sac_length = sizeof(struct sctp_assoc_change);
sac->sac_state = state;
sac->sac_error = error;
/* XXX verify these stream counts */
sac->sac_outbound_streams = stcb->asoc.streamoutcnt;
sac->sac_inbound_streams = stcb->asoc.streamincnt;
sac->sac_assoc_id = sctp_get_associd(stcb);
if (notif_len > sizeof(struct sctp_assoc_change)) {
if ((state == SCTP_COMM_UP) || (state == SCTP_RESTART)) {
i = 0;
if (stcb->asoc.peer_supports_prsctp) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_PR;
}
if (stcb->asoc.peer_supports_auth) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_AUTH;
}
if (stcb->asoc.peer_supports_asconf) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_ASCONF;
}
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_MULTIBUF;
if (stcb->asoc.peer_supports_strreset) {
sac->sac_info[i++] = SCTP_ASSOC_SUPPORTS_RE_CONFIG;
}
sac->sac_length += i;
} else if ((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC)) {
memcpy(sac->sac_info, abort, abort_len);
sac->sac_length += abort_len;
}
}
SCTP_BUF_LEN(m_notify) = sac->sac_length;
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control != NULL) {
control->length = SCTP_BUF_LEN(m_notify);
/* not that we need this */
control->tail_mbuf = m_notify;
control->spec_flags = M_NOTIFICATION;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD,
so_locked);
} else {
sctp_m_freem(m_notify);
}
}
/*
* For 1-to-1 style sockets, we send up and error when an ABORT
* comes in.
*/
set_error:
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
if (from_peer) {
if (SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_COOKIE_WAIT) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNREFUSED);
stcb->sctp_socket->so_error = ECONNREFUSED;
} else {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
stcb->sctp_socket->so_error = ECONNRESET;
}
} else {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ECONNABORTED);
stcb->sctp_socket->so_error = ECONNABORTED;
}
}
/* Wake ANY sleepers */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(stcb->sctp_ep);
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
}
#endif
if (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) &&
((state == SCTP_COMM_LOST) || (state == SCTP_CANT_STR_ASSOC))) {
socantrcvmore(stcb->sctp_socket);
}
sorwakeup(stcb->sctp_socket);
sowwakeup(stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
static void
sctp_notify_peer_addr_change(struct sctp_tcb *stcb, uint32_t state,
struct sockaddr *sa, uint32_t error)
{
struct mbuf *m_notify;
struct sctp_paddr_change *spc;
struct sctp_queued_to_read *control;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPADDREVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_paddr_change), 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
return;
SCTP_BUF_LEN(m_notify) = 0;
spc = mtod(m_notify, struct sctp_paddr_change *);
spc->spc_type = SCTP_PEER_ADDR_CHANGE;
spc->spc_flags = 0;
spc->spc_length = sizeof(struct sctp_paddr_change);
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in));
break;
#endif
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sin6;
memcpy(&spc->spc_aaddr, sa, sizeof(struct sockaddr_in6));
sin6 = (struct sockaddr_in6 *)&spc->spc_aaddr;
if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr)) {
if (sin6->sin6_scope_id == 0) {
/* recover scope_id for user */
(void)sa6_recoverscope(sin6);
} else {
/* clear embedded scope_id for user */
in6_clearscope(&sin6->sin6_addr);
}
}
break;
}
#endif
default:
/* TSNH */
break;
}
spc->spc_state = state;
spc->spc_error = error;
spc->spc_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_paddr_change);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1,
SCTP_READ_LOCK_NOT_HELD,
SCTP_SO_NOT_LOCKED);
}
static void
sctp_notify_send_failed(struct sctp_tcb *stcb, uint8_t sent, uint32_t error,
struct sctp_tmit_chunk *chk, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct mbuf *m_notify;
struct sctp_send_failed *ssf;
struct sctp_send_failed_event *ssfe;
struct sctp_queued_to_read *control;
int length;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) {
/* event not enabled */
return;
}
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
length = sizeof(struct sctp_send_failed_event);
} else {
length = sizeof(struct sctp_send_failed);
}
m_notify = sctp_get_mbuf_for_msg(length, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
length += chk->send_size;
length -= sizeof(struct sctp_data_chunk);
SCTP_BUF_LEN(m_notify) = 0;
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
ssfe = mtod(m_notify, struct sctp_send_failed_event *);
ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
if (sent) {
ssfe->ssfe_flags = SCTP_DATA_SENT;
} else {
ssfe->ssfe_flags = SCTP_DATA_UNSENT;
}
ssfe->ssfe_length = length;
ssfe->ssfe_error = error;
/* not exactly what the user sent in, but should be close :) */
bzero(&ssfe->ssfe_info, sizeof(ssfe->ssfe_info));
ssfe->ssfe_info.snd_sid = chk->rec.data.stream_number;
ssfe->ssfe_info.snd_flags = chk->rec.data.rcv_flags;
ssfe->ssfe_info.snd_ppid = chk->rec.data.payloadtype;
ssfe->ssfe_info.snd_context = chk->rec.data.context;
ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed_event);
} else {
ssf = mtod(m_notify, struct sctp_send_failed *);
ssf->ssf_type = SCTP_SEND_FAILED;
if (sent) {
ssf->ssf_flags = SCTP_DATA_SENT;
} else {
ssf->ssf_flags = SCTP_DATA_UNSENT;
}
ssf->ssf_length = length;
ssf->ssf_error = error;
/* not exactly what the user sent in, but should be close :) */
bzero(&ssf->ssf_info, sizeof(ssf->ssf_info));
ssf->ssf_info.sinfo_stream = chk->rec.data.stream_number;
ssf->ssf_info.sinfo_ssn = chk->rec.data.stream_seq;
ssf->ssf_info.sinfo_flags = chk->rec.data.rcv_flags;
ssf->ssf_info.sinfo_ppid = chk->rec.data.payloadtype;
ssf->ssf_info.sinfo_context = chk->rec.data.context;
ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
ssf->ssf_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed);
}
if (chk->data) {
/*
* trim off the sctp chunk header(it should be there)
*/
if (chk->send_size >= sizeof(struct sctp_data_chunk)) {
m_adj(chk->data, sizeof(struct sctp_data_chunk));
sctp_mbuf_crush(chk->data);
chk->send_size -= sizeof(struct sctp_data_chunk);
}
}
SCTP_BUF_NEXT(m_notify) = chk->data;
/* Steal off the mbuf */
chk->data = NULL;
/*
* For this case, we check the actual socket buffer, since the assoc
* is going away we don't want to overfill the socket buffer for a
* non-reader
*/
if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->spec_flags = M_NOTIFICATION;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1,
SCTP_READ_LOCK_NOT_HELD,
so_locked);
}
static void
sctp_notify_send_failed2(struct sctp_tcb *stcb, uint32_t error,
struct sctp_stream_queue_pending *sp, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct mbuf *m_notify;
struct sctp_send_failed *ssf;
struct sctp_send_failed_event *ssfe;
struct sctp_queued_to_read *control;
int length;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSENDFAILEVNT) &&
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT))) {
/* event not enabled */
return;
}
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
length = sizeof(struct sctp_send_failed_event);
} else {
length = sizeof(struct sctp_send_failed);
}
m_notify = sctp_get_mbuf_for_msg(length, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* no space left */
return;
}
length += sp->length;
SCTP_BUF_LEN(m_notify) = 0;
if (sctp_stcb_is_feature_on(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVNSENDFAILEVNT)) {
ssfe = mtod(m_notify, struct sctp_send_failed_event *);
ssfe->ssfe_type = SCTP_SEND_FAILED_EVENT;
ssfe->ssfe_flags = SCTP_DATA_UNSENT;
ssfe->ssfe_length = length;
ssfe->ssfe_error = error;
/* not exactly what the user sent in, but should be close :) */
bzero(&ssfe->ssfe_info, sizeof(ssfe->ssfe_info));
ssfe->ssfe_info.snd_sid = sp->stream;
if (sp->some_taken) {
ssfe->ssfe_info.snd_flags = SCTP_DATA_LAST_FRAG;
} else {
ssfe->ssfe_info.snd_flags = SCTP_DATA_NOT_FRAG;
}
ssfe->ssfe_info.snd_ppid = sp->ppid;
ssfe->ssfe_info.snd_context = sp->context;
ssfe->ssfe_info.snd_assoc_id = sctp_get_associd(stcb);
ssfe->ssfe_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed_event);
} else {
ssf = mtod(m_notify, struct sctp_send_failed *);
ssf->ssf_type = SCTP_SEND_FAILED;
ssf->ssf_flags = SCTP_DATA_UNSENT;
ssf->ssf_length = length;
ssf->ssf_error = error;
/* not exactly what the user sent in, but should be close :) */
bzero(&ssf->ssf_info, sizeof(ssf->ssf_info));
ssf->ssf_info.sinfo_stream = sp->stream;
ssf->ssf_info.sinfo_ssn = sp->strseq;
if (sp->some_taken) {
ssf->ssf_info.sinfo_flags = SCTP_DATA_LAST_FRAG;
} else {
ssf->ssf_info.sinfo_flags = SCTP_DATA_NOT_FRAG;
}
ssf->ssf_info.sinfo_ppid = sp->ppid;
ssf->ssf_info.sinfo_context = sp->context;
ssf->ssf_info.sinfo_assoc_id = sctp_get_associd(stcb);
ssf->ssf_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_send_failed);
}
SCTP_BUF_NEXT(m_notify) = sp->data;
/* Steal off the mbuf */
sp->data = NULL;
/*
* For this case, we check the actual socket buffer, since the assoc
* is going away we don't want to overfill the socket buffer for a
* non-reader
*/
if (sctp_sbspace_failedmsgs(&stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->spec_flags = M_NOTIFICATION;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked);
}
static void
sctp_notify_adaptation_layer(struct sctp_tcb *stcb)
{
struct mbuf *m_notify;
struct sctp_adaptation_event *sai;
struct sctp_queued_to_read *control;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ADAPTATIONEVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_adaption_event), 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
sai = mtod(m_notify, struct sctp_adaptation_event *);
sai->sai_type = SCTP_ADAPTATION_INDICATION;
sai->sai_flags = 0;
sai->sai_length = sizeof(struct sctp_adaptation_event);
sai->sai_adaptation_ind = stcb->asoc.peers_adaptation;
sai->sai_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_adaptation_event);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
/* This always must be called with the read-queue LOCKED in the INP */
static void
sctp_notify_partial_delivery_indication(struct sctp_tcb *stcb, uint32_t error,
uint32_t val, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct mbuf *m_notify;
struct sctp_pdapi_event *pdapi;
struct sctp_queued_to_read *control;
struct sockbuf *sb;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_PDAPIEVNT)) {
/* event not enabled */
return;
}
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_pdapi_event), 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
pdapi = mtod(m_notify, struct sctp_pdapi_event *);
pdapi->pdapi_type = SCTP_PARTIAL_DELIVERY_EVENT;
pdapi->pdapi_flags = 0;
pdapi->pdapi_length = sizeof(struct sctp_pdapi_event);
pdapi->pdapi_indication = error;
pdapi->pdapi_stream = (val >> 16);
pdapi->pdapi_seq = (val & 0x0000ffff);
pdapi->pdapi_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_pdapi_event);
SCTP_BUF_NEXT(m_notify) = NULL;
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->spec_flags = M_NOTIFICATION;
control->length = SCTP_BUF_LEN(m_notify);
/* not that we need this */
control->tail_mbuf = m_notify;
control->held_length = 0;
control->length = 0;
sb = &stcb->sctp_socket->so_rcv;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m_notify));
}
sctp_sballoc(stcb, sb, m_notify);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
}
atomic_add_int(&control->length, SCTP_BUF_LEN(m_notify));
control->end_added = 1;
if (stcb->asoc.control_pdapi)
TAILQ_INSERT_AFTER(&stcb->sctp_ep->read_queue, stcb->asoc.control_pdapi, control, next);
else {
/* we really should not see this case */
TAILQ_INSERT_TAIL(&stcb->sctp_ep->read_queue, control, next);
}
if (stcb->sctp_ep && stcb->sctp_socket) {
/* This should always be the case */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
so = SCTP_INP_SO(stcb->sctp_ep);
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
}
#endif
sctp_sorwakeup(stcb->sctp_ep, stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
}
static void
sctp_notify_shutdown_event(struct sctp_tcb *stcb)
{
struct mbuf *m_notify;
struct sctp_shutdown_event *sse;
struct sctp_queued_to_read *control;
/*
* For TCP model AND UDP connected sockets we will send an error up
* when an SHUTDOWN completes
*/
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
/* mark socket closed for read/write and wakeup! */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
so = SCTP_INP_SO(stcb->sctp_ep);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
#endif
socantsendmore(stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
if (sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVSHUTDOWNEVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_shutdown_event), 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
sse = mtod(m_notify, struct sctp_shutdown_event *);
sse->sse_type = SCTP_SHUTDOWN_EVENT;
sse->sse_flags = 0;
sse->sse_length = sizeof(struct sctp_shutdown_event);
sse->sse_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_shutdown_event);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->spec_flags = M_NOTIFICATION;
control->length = SCTP_BUF_LEN(m_notify);
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
static void
sctp_notify_sender_dry_event(struct sctp_tcb *stcb,
int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct mbuf *m_notify;
struct sctp_sender_dry_event *event;
struct sctp_queued_to_read *control;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_DRYEVNT)) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_sender_dry_event), 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* no space left */
return;
}
SCTP_BUF_LEN(m_notify) = 0;
event = mtod(m_notify, struct sctp_sender_dry_event *);
event->sender_dry_type = SCTP_SENDER_DRY_EVENT;
event->sender_dry_flags = 0;
event->sender_dry_length = sizeof(struct sctp_sender_dry_event);
event->sender_dry_assoc_id = sctp_get_associd(stcb);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_sender_dry_event);
SCTP_BUF_NEXT(m_notify) = NULL;
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->length = SCTP_BUF_LEN(m_notify);
control->spec_flags = M_NOTIFICATION;
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb, control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, so_locked);
}
void
sctp_notify_stream_reset_add(struct sctp_tcb *stcb, uint16_t numberin, uint16_t numberout, int flag)
{
struct mbuf *m_notify;
struct sctp_queued_to_read *control;
struct sctp_stream_change_event *stradd;
int len;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_CHANGEEVNT))) {
/* event not enabled */
return;
}
if ((stcb->asoc.peer_req_out) && flag) {
/* Peer made the request, don't tell the local user */
stcb->asoc.peer_req_out = 0;
return;
}
stcb->asoc.peer_req_out = 0;
m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
len = sizeof(struct sctp_stream_change_event);
if (len > M_TRAILINGSPACE(m_notify)) {
/* never enough room */
sctp_m_freem(m_notify);
return;
}
stradd = mtod(m_notify, struct sctp_stream_change_event *);
stradd->strchange_type = SCTP_STREAM_CHANGE_EVENT;
stradd->strchange_flags = flag;
stradd->strchange_length = len;
stradd->strchange_assoc_id = sctp_get_associd(stcb);
stradd->strchange_instrms = numberin;
stradd->strchange_outstrms = numberout;
SCTP_BUF_LEN(m_notify) = len;
SCTP_BUF_NEXT(m_notify) = NULL;
if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
/* no space */
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->spec_flags = M_NOTIFICATION;
control->length = SCTP_BUF_LEN(m_notify);
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
void
sctp_notify_stream_reset_tsn(struct sctp_tcb *stcb, uint32_t sending_tsn, uint32_t recv_tsn, int flag)
{
struct mbuf *m_notify;
struct sctp_queued_to_read *control;
struct sctp_assoc_reset_event *strasoc;
int len;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_ASSOC_RESETEVNT))) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
len = sizeof(struct sctp_assoc_reset_event);
if (len > M_TRAILINGSPACE(m_notify)) {
/* never enough room */
sctp_m_freem(m_notify);
return;
}
strasoc = mtod(m_notify, struct sctp_assoc_reset_event *);
strasoc->assocreset_type = SCTP_ASSOC_RESET_EVENT;
strasoc->assocreset_flags = flag;
strasoc->assocreset_length = len;
strasoc->assocreset_assoc_id = sctp_get_associd(stcb);
strasoc->assocreset_local_tsn = sending_tsn;
strasoc->assocreset_remote_tsn = recv_tsn;
SCTP_BUF_LEN(m_notify) = len;
SCTP_BUF_NEXT(m_notify) = NULL;
if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
/* no space */
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->spec_flags = M_NOTIFICATION;
control->length = SCTP_BUF_LEN(m_notify);
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
static void
sctp_notify_stream_reset(struct sctp_tcb *stcb,
int number_entries, uint16_t * list, int flag)
{
struct mbuf *m_notify;
struct sctp_queued_to_read *control;
struct sctp_stream_reset_event *strreset;
int len;
if ((stcb == NULL) ||
(sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_STREAM_RESETEVNT))) {
/* event not enabled */
return;
}
m_notify = sctp_get_mbuf_for_msg(MCLBYTES, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL)
/* no space left */
return;
SCTP_BUF_LEN(m_notify) = 0;
len = sizeof(struct sctp_stream_reset_event) + (number_entries * sizeof(uint16_t));
if (len > M_TRAILINGSPACE(m_notify)) {
/* never enough room */
sctp_m_freem(m_notify);
return;
}
strreset = mtod(m_notify, struct sctp_stream_reset_event *);
strreset->strreset_type = SCTP_STREAM_RESET_EVENT;
strreset->strreset_flags = flag;
strreset->strreset_length = len;
strreset->strreset_assoc_id = sctp_get_associd(stcb);
if (number_entries) {
int i;
for (i = 0; i < number_entries; i++) {
strreset->strreset_stream_list[i] = ntohs(list[i]);
}
}
SCTP_BUF_LEN(m_notify) = len;
SCTP_BUF_NEXT(m_notify) = NULL;
if (sctp_sbspace(&stcb->asoc, &stcb->sctp_socket->so_rcv) < SCTP_BUF_LEN(m_notify)) {
/* no space */
sctp_m_freem(m_notify);
return;
}
/* append to socket */
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control == NULL) {
/* no memory */
sctp_m_freem(m_notify);
return;
}
control->spec_flags = M_NOTIFICATION;
control->length = SCTP_BUF_LEN(m_notify);
/* not that we need this */
control->tail_mbuf = m_notify;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1, SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
}
static void
sctp_notify_remote_error(struct sctp_tcb *stcb, uint16_t error, struct sctp_error_chunk *chunk)
{
struct mbuf *m_notify;
struct sctp_remote_error *sre;
struct sctp_queued_to_read *control;
size_t notif_len, chunk_len;
if ((stcb == NULL) ||
sctp_stcb_is_feature_off(stcb->sctp_ep, stcb, SCTP_PCB_FLAGS_RECVPEERERR)) {
return;
}
if (chunk != NULL) {
chunk_len = htons(chunk->ch.chunk_length);
} else {
chunk_len = 0;
}
notif_len = sizeof(struct sctp_remote_error) + chunk_len;
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL) {
/* Retry with smaller value. */
notif_len = sizeof(struct sctp_remote_error);
m_notify = sctp_get_mbuf_for_msg(notif_len, 0, M_DONTWAIT, 1, MT_DATA);
if (m_notify == NULL) {
return;
}
}
SCTP_BUF_NEXT(m_notify) = NULL;
sre = mtod(m_notify, struct sctp_remote_error *);
sre->sre_type = SCTP_REMOTE_ERROR;
sre->sre_flags = 0;
sre->sre_length = sizeof(struct sctp_remote_error);
sre->sre_error = error;
sre->sre_assoc_id = sctp_get_associd(stcb);
if (notif_len > sizeof(struct sctp_remote_error)) {
memcpy(sre->sre_data, chunk, chunk_len);
sre->sre_length += chunk_len;
}
SCTP_BUF_LEN(m_notify) = sre->sre_length;
control = sctp_build_readq_entry(stcb, stcb->asoc.primary_destination,
0, 0, stcb->asoc.context, 0, 0, 0,
m_notify);
if (control != NULL) {
control->length = SCTP_BUF_LEN(m_notify);
/* not that we need this */
control->tail_mbuf = m_notify;
control->spec_flags = M_NOTIFICATION;
sctp_add_to_readq(stcb->sctp_ep, stcb,
control,
&stcb->sctp_socket->so_rcv, 1,
SCTP_READ_LOCK_NOT_HELD, SCTP_SO_NOT_LOCKED);
} else {
sctp_m_freem(m_notify);
}
}
void
sctp_ulp_notify(uint32_t notification, struct sctp_tcb *stcb,
uint32_t error, void *data, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
if ((stcb == NULL) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
(stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) {
/* If the socket is gone we are out of here */
return;
}
if (stcb->sctp_socket->so_rcv.sb_state & SBS_CANTRCVMORE) {
return;
}
if (stcb && ((stcb->asoc.state & SCTP_STATE_COOKIE_WAIT) ||
(stcb->asoc.state & SCTP_STATE_COOKIE_ECHOED))) {
if ((notification == SCTP_NOTIFY_INTERFACE_DOWN) ||
(notification == SCTP_NOTIFY_INTERFACE_UP) ||
(notification == SCTP_NOTIFY_INTERFACE_CONFIRMED)) {
/* Don't report these in front states */
return;
}
}
switch (notification) {
case SCTP_NOTIFY_ASSOC_UP:
if (stcb->asoc.assoc_up_sent == 0) {
sctp_notify_assoc_change(SCTP_COMM_UP, stcb, error, NULL, 0, so_locked);
stcb->asoc.assoc_up_sent = 1;
}
if (stcb->asoc.adaptation_needed && (stcb->asoc.adaptation_sent == 0)) {
sctp_notify_adaptation_layer(stcb);
}
if (stcb->asoc.peer_supports_auth == 0) {
sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
NULL, so_locked);
}
break;
case SCTP_NOTIFY_ASSOC_DOWN:
sctp_notify_assoc_change(SCTP_SHUTDOWN_COMP, stcb, error, NULL, 0, so_locked);
break;
case SCTP_NOTIFY_INTERFACE_DOWN:
{
struct sctp_nets *net;
net = (struct sctp_nets *)data;
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_UNREACHABLE,
(struct sockaddr *)&net->ro._l_addr, error);
break;
}
case SCTP_NOTIFY_INTERFACE_UP:
{
struct sctp_nets *net;
net = (struct sctp_nets *)data;
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_AVAILABLE,
(struct sockaddr *)&net->ro._l_addr, error);
break;
}
case SCTP_NOTIFY_INTERFACE_CONFIRMED:
{
struct sctp_nets *net;
net = (struct sctp_nets *)data;
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_CONFIRMED,
(struct sockaddr *)&net->ro._l_addr, error);
break;
}
case SCTP_NOTIFY_SPECIAL_SP_FAIL:
sctp_notify_send_failed2(stcb, error,
(struct sctp_stream_queue_pending *)data, so_locked);
break;
case SCTP_NOTIFY_SENT_DG_FAIL:
sctp_notify_send_failed(stcb, 1, error,
(struct sctp_tmit_chunk *)data, so_locked);
break;
case SCTP_NOTIFY_UNSENT_DG_FAIL:
sctp_notify_send_failed(stcb, 0, error,
(struct sctp_tmit_chunk *)data, so_locked);
break;
case SCTP_NOTIFY_PARTIAL_DELVIERY_INDICATION:
{
uint32_t val;
val = *((uint32_t *) data);
sctp_notify_partial_delivery_indication(stcb, error, val, so_locked);
break;
}
case SCTP_NOTIFY_ASSOC_LOC_ABORTED:
if ((stcb) && (((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_WAIT) ||
((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_ECHOED))) {
sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, 0, so_locked);
} else {
sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, 0, so_locked);
}
break;
case SCTP_NOTIFY_ASSOC_REM_ABORTED:
if ((stcb) && (((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_WAIT) ||
((stcb->asoc.state & SCTP_STATE_MASK) == SCTP_STATE_COOKIE_ECHOED))) {
sctp_notify_assoc_change(SCTP_CANT_STR_ASSOC, stcb, error, data, 1, so_locked);
} else {
sctp_notify_assoc_change(SCTP_COMM_LOST, stcb, error, data, 1, so_locked);
}
break;
case SCTP_NOTIFY_ASSOC_RESTART:
sctp_notify_assoc_change(SCTP_RESTART, stcb, error, NULL, 0, so_locked);
if (stcb->asoc.peer_supports_auth == 0) {
sctp_ulp_notify(SCTP_NOTIFY_NO_PEER_AUTH, stcb, 0,
NULL, so_locked);
}
break;
case SCTP_NOTIFY_STR_RESET_SEND:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_OUTGOING_SSN);
break;
case SCTP_NOTIFY_STR_RESET_RECV:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data), SCTP_STREAM_RESET_INCOMING);
break;
case SCTP_NOTIFY_STR_RESET_FAILED_OUT:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_OUTGOING_SSN | SCTP_STREAM_RESET_FAILED));
break;
case SCTP_NOTIFY_STR_RESET_DENIED_OUT:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_OUTGOING_SSN | SCTP_STREAM_RESET_DENIED));
break;
case SCTP_NOTIFY_STR_RESET_FAILED_IN:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_INCOMING | SCTP_STREAM_RESET_FAILED));
break;
case SCTP_NOTIFY_STR_RESET_DENIED_IN:
sctp_notify_stream_reset(stcb, error, ((uint16_t *) data),
(SCTP_STREAM_RESET_INCOMING | SCTP_STREAM_RESET_DENIED));
break;
case SCTP_NOTIFY_ASCONF_ADD_IP:
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_ADDED, data,
error);
break;
case SCTP_NOTIFY_ASCONF_DELETE_IP:
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_REMOVED, data,
error);
break;
case SCTP_NOTIFY_ASCONF_SET_PRIMARY:
sctp_notify_peer_addr_change(stcb, SCTP_ADDR_MADE_PRIM, data,
error);
break;
case SCTP_NOTIFY_PEER_SHUTDOWN:
sctp_notify_shutdown_event(stcb);
break;
case SCTP_NOTIFY_AUTH_NEW_KEY:
sctp_notify_authentication(stcb, SCTP_AUTH_NEW_KEY, error,
(uint16_t) (uintptr_t) data,
so_locked);
break;
case SCTP_NOTIFY_AUTH_FREE_KEY:
sctp_notify_authentication(stcb, SCTP_AUTH_FREE_KEY, error,
(uint16_t) (uintptr_t) data,
so_locked);
break;
case SCTP_NOTIFY_NO_PEER_AUTH:
sctp_notify_authentication(stcb, SCTP_AUTH_NO_AUTH, error,
(uint16_t) (uintptr_t) data,
so_locked);
break;
case SCTP_NOTIFY_SENDER_DRY:
sctp_notify_sender_dry_event(stcb, so_locked);
break;
case SCTP_NOTIFY_REMOTE_ERROR:
sctp_notify_remote_error(stcb, error, data);
break;
default:
SCTPDBG(SCTP_DEBUG_UTIL1, "%s: unknown notification %xh (%u)\n",
__FUNCTION__, notification, notification);
break;
} /* end switch */
}
void
sctp_report_all_outbound(struct sctp_tcb *stcb, uint16_t error, int holds_lock, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct sctp_association *asoc;
struct sctp_stream_out *outs;
struct sctp_tmit_chunk *chk, *nchk;
struct sctp_stream_queue_pending *sp, *nsp;
int i;
if (stcb == NULL) {
return;
}
asoc = &stcb->asoc;
if (asoc->state & SCTP_STATE_ABOUT_TO_BE_FREED) {
/* already being freed */
return;
}
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
(asoc->state & SCTP_STATE_CLOSED_SOCKET)) {
return;
}
/* now through all the gunk freeing chunks */
if (holds_lock == 0) {
SCTP_TCB_SEND_LOCK(stcb);
}
/* sent queue SHOULD be empty */
TAILQ_FOREACH_SAFE(chk, &asoc->sent_queue, sctp_next, nchk) {
TAILQ_REMOVE(&asoc->sent_queue, chk, sctp_next);
asoc->sent_queue_cnt--;
if (chk->data != NULL) {
sctp_free_bufspace(stcb, asoc, chk, 1);
sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb,
error, chk, so_locked);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
}
sctp_free_a_chunk(stcb, chk, so_locked);
/* sa_ignore FREED_MEMORY */
}
/* pending send queue SHOULD be empty */
TAILQ_FOREACH_SAFE(chk, &asoc->send_queue, sctp_next, nchk) {
TAILQ_REMOVE(&asoc->send_queue, chk, sctp_next);
asoc->send_queue_cnt--;
if (chk->data != NULL) {
sctp_free_bufspace(stcb, asoc, chk, 1);
sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb,
error, chk, so_locked);
if (chk->data) {
sctp_m_freem(chk->data);
chk->data = NULL;
}
}
sctp_free_a_chunk(stcb, chk, so_locked);
/* sa_ignore FREED_MEMORY */
}
for (i = 0; i < asoc->streamoutcnt; i++) {
/* For each stream */
outs = &asoc->strmout[i];
/* clean up any sends there */
asoc->locked_on_sending = NULL;
TAILQ_FOREACH_SAFE(sp, &outs->outqueue, next, nsp) {
asoc->stream_queue_cnt--;
TAILQ_REMOVE(&outs->outqueue, sp, next);
sctp_free_spbufspace(stcb, asoc, sp);
if (sp->data) {
sctp_ulp_notify(SCTP_NOTIFY_SPECIAL_SP_FAIL, stcb,
error, (void *)sp, so_locked);
if (sp->data) {
sctp_m_freem(sp->data);
sp->data = NULL;
sp->tail_mbuf = NULL;
sp->length = 0;
}
}
if (sp->net) {
sctp_free_remote_addr(sp->net);
sp->net = NULL;
}
/* Free the chunk */
sctp_free_a_strmoq(stcb, sp, so_locked);
/* sa_ignore FREED_MEMORY */
}
}
if (holds_lock == 0) {
SCTP_TCB_SEND_UNLOCK(stcb);
}
}
void
sctp_abort_notification(struct sctp_tcb *stcb, uint8_t from_peer, uint16_t error,
struct sctp_abort_chunk *abort, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
if (stcb == NULL) {
return;
}
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL) ||
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) &&
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_CONNECTED))) {
stcb->sctp_ep->sctp_flags |= SCTP_PCB_FLAGS_WAS_ABORTED;
}
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE) ||
(stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET)) {
return;
}
/* Tell them we lost the asoc */
sctp_report_all_outbound(stcb, error, 1, so_locked);
if (from_peer) {
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_REM_ABORTED, stcb, error, abort, so_locked);
} else {
sctp_ulp_notify(SCTP_NOTIFY_ASSOC_LOC_ABORTED, stcb, error, abort, so_locked);
}
}
void
sctp_abort_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct mbuf *m, int iphlen,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct mbuf *op_err,
uint8_t use_mflowid, uint32_t mflowid,
uint32_t vrf_id, uint16_t port)
{
uint32_t vtag;
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
vtag = 0;
if (stcb != NULL) {
/* We have a TCB to abort, send notification too */
vtag = stcb->asoc.peer_vtag;
sctp_abort_notification(stcb, 0, 0, NULL, SCTP_SO_NOT_LOCKED);
/* get the assoc vrf id and table id */
vrf_id = stcb->asoc.vrf_id;
stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
}
sctp_send_abort(m, iphlen, src, dst, sh, vtag, op_err,
use_mflowid, mflowid,
vrf_id, port);
if (stcb != NULL) {
/* Ok, now lets free it */
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(inp);
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
#endif
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTPUTIL + SCTP_LOC_4);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
}
#ifdef SCTP_ASOCLOG_OF_TSNS
void
sctp_print_out_track_log(struct sctp_tcb *stcb)
{
#ifdef NOSIY_PRINTS
int i;
SCTP_PRINTF("Last ep reason:%x\n", stcb->sctp_ep->last_abort_code);
SCTP_PRINTF("IN bound TSN log-aaa\n");
if ((stcb->asoc.tsn_in_at == 0) && (stcb->asoc.tsn_in_wrapped == 0)) {
SCTP_PRINTF("None rcvd\n");
goto none_in;
}
if (stcb->asoc.tsn_in_wrapped) {
for (i = stcb->asoc.tsn_in_at; i < SCTP_TSN_LOG_SIZE; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.in_tsnlog[i].tsn,
stcb->asoc.in_tsnlog[i].strm,
stcb->asoc.in_tsnlog[i].seq,
stcb->asoc.in_tsnlog[i].flgs,
stcb->asoc.in_tsnlog[i].sz);
}
}
if (stcb->asoc.tsn_in_at) {
for (i = 0; i < stcb->asoc.tsn_in_at; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.in_tsnlog[i].tsn,
stcb->asoc.in_tsnlog[i].strm,
stcb->asoc.in_tsnlog[i].seq,
stcb->asoc.in_tsnlog[i].flgs,
stcb->asoc.in_tsnlog[i].sz);
}
}
none_in:
SCTP_PRINTF("OUT bound TSN log-aaa\n");
if ((stcb->asoc.tsn_out_at == 0) &&
(stcb->asoc.tsn_out_wrapped == 0)) {
SCTP_PRINTF("None sent\n");
}
if (stcb->asoc.tsn_out_wrapped) {
for (i = stcb->asoc.tsn_out_at; i < SCTP_TSN_LOG_SIZE; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.out_tsnlog[i].tsn,
stcb->asoc.out_tsnlog[i].strm,
stcb->asoc.out_tsnlog[i].seq,
stcb->asoc.out_tsnlog[i].flgs,
stcb->asoc.out_tsnlog[i].sz);
}
}
if (stcb->asoc.tsn_out_at) {
for (i = 0; i < stcb->asoc.tsn_out_at; i++) {
SCTP_PRINTF("TSN:%x strm:%d seq:%d flags:%x sz:%d\n",
stcb->asoc.out_tsnlog[i].tsn,
stcb->asoc.out_tsnlog[i].strm,
stcb->asoc.out_tsnlog[i].seq,
stcb->asoc.out_tsnlog[i].flgs,
stcb->asoc.out_tsnlog[i].sz);
}
}
#endif
}
#endif
void
sctp_abort_an_association(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
struct mbuf *op_err,
int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
#endif
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
so = SCTP_INP_SO(inp);
#endif
if (stcb == NULL) {
/* Got to have a TCB */
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
SCTP_CALLED_DIRECTLY_NOCMPSET);
}
}
return;
} else {
stcb->asoc.state |= SCTP_STATE_WAS_ABORTED;
}
/* notify the ulp */
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) == 0) {
sctp_abort_notification(stcb, 0, 0, NULL, so_locked);
}
/* notify the peer */
sctp_send_abort_tcb(stcb, op_err, so_locked);
SCTP_STAT_INCR_COUNTER32(sctps_aborted);
if ((SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_OPEN) ||
(SCTP_GET_STATE(&stcb->asoc) == SCTP_STATE_SHUTDOWN_RECEIVED)) {
SCTP_STAT_DECR_GAUGE32(sctps_currestab);
}
/* now free the asoc */
#ifdef SCTP_ASOCLOG_OF_TSNS
sctp_print_out_track_log(stcb);
#endif
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
#endif
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTPUTIL + SCTP_LOC_5);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
void
sctp_handle_ootb(struct mbuf *m, int iphlen, int offset,
struct sockaddr *src, struct sockaddr *dst,
struct sctphdr *sh, struct sctp_inpcb *inp,
uint8_t use_mflowid, uint32_t mflowid,
uint32_t vrf_id, uint16_t port)
{
struct sctp_chunkhdr *ch, chunk_buf;
unsigned int chk_length;
int contains_init_chunk;
SCTP_STAT_INCR_COUNTER32(sctps_outoftheblue);
/* Generate a TO address for future reference */
if (inp && (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)) {
if (LIST_FIRST(&inp->sctp_asoc_list) == NULL) {
sctp_inpcb_free(inp, SCTP_FREE_SHOULD_USE_ABORT,
SCTP_CALLED_DIRECTLY_NOCMPSET);
}
}
contains_init_chunk = 0;
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
while (ch != NULL) {
chk_length = ntohs(ch->chunk_length);
if (chk_length < sizeof(*ch)) {
/* break to abort land */
break;
}
switch (ch->chunk_type) {
case SCTP_INIT:
contains_init_chunk = 1;
break;
case SCTP_COOKIE_ECHO:
/* We hit here only if the assoc is being freed */
return;
case SCTP_PACKET_DROPPED:
/* we don't respond to pkt-dropped */
return;
case SCTP_ABORT_ASSOCIATION:
/* we don't respond with an ABORT to an ABORT */
return;
case SCTP_SHUTDOWN_COMPLETE:
/*
* we ignore it since we are not waiting for it and
* peer is gone
*/
return;
case SCTP_SHUTDOWN_ACK:
sctp_send_shutdown_complete2(src, dst, sh,
use_mflowid, mflowid,
vrf_id, port);
return;
default:
break;
}
offset += SCTP_SIZE32(chk_length);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
}
if ((SCTP_BASE_SYSCTL(sctp_blackhole) == 0) ||
((SCTP_BASE_SYSCTL(sctp_blackhole) == 1) &&
(contains_init_chunk == 0))) {
sctp_send_abort(m, iphlen, src, dst, sh, 0, NULL,
use_mflowid, mflowid,
vrf_id, port);
}
}
/*
* check the inbound datagram to make sure there is not an abort inside it,
* if there is return 1, else return 0.
*/
int
sctp_is_there_an_abort_here(struct mbuf *m, int iphlen, uint32_t * vtagfill)
{
struct sctp_chunkhdr *ch;
struct sctp_init_chunk *init_chk, chunk_buf;
int offset;
unsigned int chk_length;
offset = iphlen + sizeof(struct sctphdr);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset, sizeof(*ch),
(uint8_t *) & chunk_buf);
while (ch != NULL) {
chk_length = ntohs(ch->chunk_length);
if (chk_length < sizeof(*ch)) {
/* packet is probably corrupt */
break;
}
/* we seem to be ok, is it an abort? */
if (ch->chunk_type == SCTP_ABORT_ASSOCIATION) {
/* yep, tell them */
return (1);
}
if (ch->chunk_type == SCTP_INITIATION) {
/* need to update the Vtag */
init_chk = (struct sctp_init_chunk *)sctp_m_getptr(m,
offset, sizeof(*init_chk), (uint8_t *) & chunk_buf);
if (init_chk != NULL) {
*vtagfill = ntohl(init_chk->init.initiate_tag);
}
}
/* Nope, move to the next chunk */
offset += SCTP_SIZE32(chk_length);
ch = (struct sctp_chunkhdr *)sctp_m_getptr(m, offset,
sizeof(*ch), (uint8_t *) & chunk_buf);
}
return (0);
}
/*
* currently (2/02), ifa_addr embeds scope_id's and don't have sin6_scope_id
* set (i.e. it's 0) so, create this function to compare link local scopes
*/
#ifdef INET6
uint32_t
sctp_is_same_scope(struct sockaddr_in6 *addr1, struct sockaddr_in6 *addr2)
{
struct sockaddr_in6 a, b;
/* save copies */
a = *addr1;
b = *addr2;
if (a.sin6_scope_id == 0)
if (sa6_recoverscope(&a)) {
/* can't get scope, so can't match */
return (0);
}
if (b.sin6_scope_id == 0)
if (sa6_recoverscope(&b)) {
/* can't get scope, so can't match */
return (0);
}
if (a.sin6_scope_id != b.sin6_scope_id)
return (0);
return (1);
}
/*
* returns a sockaddr_in6 with embedded scope recovered and removed
*/
struct sockaddr_in6 *
sctp_recover_scope(struct sockaddr_in6 *addr, struct sockaddr_in6 *store)
{
/* check and strip embedded scope junk */
if (addr->sin6_family == AF_INET6) {
if (IN6_IS_SCOPE_LINKLOCAL(&addr->sin6_addr)) {
if (addr->sin6_scope_id == 0) {
*store = *addr;
if (!sa6_recoverscope(store)) {
/* use the recovered scope */
addr = store;
}
} else {
/* else, return the original "to" addr */
in6_clearscope(&addr->sin6_addr);
}
}
}
return (addr);
}
#endif
/*
* are the two addresses the same? currently a "scopeless" check returns: 1
* if same, 0 if not
*/
int
sctp_cmpaddr(struct sockaddr *sa1, struct sockaddr *sa2)
{
/* must be valid */
if (sa1 == NULL || sa2 == NULL)
return (0);
/* must be the same family */
if (sa1->sa_family != sa2->sa_family)
return (0);
switch (sa1->sa_family) {
#ifdef INET6
case AF_INET6:
{
/* IPv6 addresses */
struct sockaddr_in6 *sin6_1, *sin6_2;
sin6_1 = (struct sockaddr_in6 *)sa1;
sin6_2 = (struct sockaddr_in6 *)sa2;
return (SCTP6_ARE_ADDR_EQUAL(sin6_1,
sin6_2));
}
#endif
#ifdef INET
case AF_INET:
{
/* IPv4 addresses */
struct sockaddr_in *sin_1, *sin_2;
sin_1 = (struct sockaddr_in *)sa1;
sin_2 = (struct sockaddr_in *)sa2;
return (sin_1->sin_addr.s_addr == sin_2->sin_addr.s_addr);
}
#endif
default:
/* we don't do these... */
return (0);
}
}
void
sctp_print_address(struct sockaddr *sa)
{
#ifdef INET6
char ip6buf[INET6_ADDRSTRLEN];
#endif
switch (sa->sa_family) {
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)sa;
SCTP_PRINTF("IPv6 address: %s:port:%d scope:%u\n",
ip6_sprintf(ip6buf, &sin6->sin6_addr),
ntohs(sin6->sin6_port),
sin6->sin6_scope_id);
break;
}
#endif
#ifdef INET
case AF_INET:
{
struct sockaddr_in *sin;
unsigned char *p;
sin = (struct sockaddr_in *)sa;
p = (unsigned char *)&sin->sin_addr;
SCTP_PRINTF("IPv4 address: %u.%u.%u.%u:%d\n",
p[0], p[1], p[2], p[3], ntohs(sin->sin_port));
break;
}
#endif
default:
SCTP_PRINTF("?\n");
break;
}
}
void
sctp_pull_off_control_to_new_inp(struct sctp_inpcb *old_inp,
struct sctp_inpcb *new_inp,
struct sctp_tcb *stcb,
int waitflags)
{
/*
* go through our old INP and pull off any control structures that
* belong to stcb and move then to the new inp.
*/
struct socket *old_so, *new_so;
struct sctp_queued_to_read *control, *nctl;
struct sctp_readhead tmp_queue;
struct mbuf *m;
int error = 0;
old_so = old_inp->sctp_socket;
new_so = new_inp->sctp_socket;
TAILQ_INIT(&tmp_queue);
error = sblock(&old_so->so_rcv, waitflags);
if (error) {
/*
* Gak, can't get sblock, we have a problem. data will be
* left stranded.. and we don't dare look at it since the
* other thread may be reading something. Oh well, its a
* screwed up app that does a peeloff OR a accept while
* reading from the main socket... actually its only the
* peeloff() case, since I think read will fail on a
* listening socket..
*/
return;
}
/* lock the socket buffers */
SCTP_INP_READ_LOCK(old_inp);
TAILQ_FOREACH_SAFE(control, &old_inp->read_queue, next, nctl) {
/* Pull off all for out target stcb */
if (control->stcb == stcb) {
/* remove it we want it */
TAILQ_REMOVE(&old_inp->read_queue, control, next);
TAILQ_INSERT_TAIL(&tmp_queue, control, next);
m = control->data;
while (m) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
}
sctp_sbfree(control, stcb, &old_so->so_rcv, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&old_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
}
m = SCTP_BUF_NEXT(m);
}
}
}
SCTP_INP_READ_UNLOCK(old_inp);
/* Remove the sb-lock on the old socket */
sbunlock(&old_so->so_rcv);
/* Now we move them over to the new socket buffer */
SCTP_INP_READ_LOCK(new_inp);
TAILQ_FOREACH_SAFE(control, &tmp_queue, next, nctl) {
TAILQ_INSERT_TAIL(&new_inp->read_queue, control, next);
m = control->data;
while (m) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
}
sctp_sballoc(stcb, &new_so->so_rcv, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&new_so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
}
m = SCTP_BUF_NEXT(m);
}
}
SCTP_INP_READ_UNLOCK(new_inp);
}
void
sctp_add_to_readq(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_queued_to_read *control,
struct sockbuf *sb,
int end,
int inp_read_lock_held,
int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
/*
* Here we must place the control on the end of the socket read
* queue AND increment sb_cc so that select will work properly on
* read.
*/
struct mbuf *m, *prev = NULL;
if (inp == NULL) {
/* Gak, TSNH!! */
#ifdef INVARIANTS
panic("Gak, inp NULL on add_to_readq");
#endif
return;
}
if (inp_read_lock_held == 0)
SCTP_INP_READ_LOCK(inp);
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ) {
sctp_free_remote_addr(control->whoFrom);
if (control->data) {
sctp_m_freem(control->data);
control->data = NULL;
}
SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), control);
if (inp_read_lock_held == 0)
SCTP_INP_READ_UNLOCK(inp);
return;
}
if (!(control->spec_flags & M_NOTIFICATION)) {
atomic_add_int(&inp->total_recvs, 1);
if (!control->do_not_ref_stcb) {
atomic_add_int(&stcb->total_recvs, 1);
}
}
m = control->data;
control->held_length = 0;
control->length = 0;
while (m) {
if (SCTP_BUF_LEN(m) == 0) {
/* Skip mbufs with NO length */
if (prev == NULL) {
/* First one */
control->data = sctp_m_free(m);
m = control->data;
} else {
SCTP_BUF_NEXT(prev) = sctp_m_free(m);
m = SCTP_BUF_NEXT(prev);
}
if (m == NULL) {
control->tail_mbuf = prev;
}
continue;
}
prev = m;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(m));
}
sctp_sballoc(stcb, sb, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
}
atomic_add_int(&control->length, SCTP_BUF_LEN(m));
m = SCTP_BUF_NEXT(m);
}
if (prev != NULL) {
control->tail_mbuf = prev;
} else {
/* Everything got collapsed out?? */
sctp_free_remote_addr(control->whoFrom);
SCTP_ZONE_FREE(SCTP_BASE_INFO(ipi_zone_readq), control);
if (inp_read_lock_held == 0)
SCTP_INP_READ_UNLOCK(inp);
return;
}
if (end) {
control->end_added = 1;
}
TAILQ_INSERT_TAIL(&inp->read_queue, control, next);
if (inp_read_lock_held == 0)
SCTP_INP_READ_UNLOCK(inp);
if (inp && inp->sctp_socket) {
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
SCTP_ZERO_COPY_EVENT(inp, inp->sctp_socket);
} else {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
so = SCTP_INP_SO(inp);
if (!so_locked) {
if (stcb) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
}
SCTP_SOCKET_LOCK(so, 1);
if (stcb) {
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
SCTP_SOCKET_UNLOCK(so, 1);
return;
}
}
#endif
sctp_sorwakeup(inp, inp->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
}
}
int
sctp_append_to_readq(struct sctp_inpcb *inp,
struct sctp_tcb *stcb,
struct sctp_queued_to_read *control,
struct mbuf *m,
int end,
int ctls_cumack,
struct sockbuf *sb)
{
/*
* A partial delivery API event is underway. OR we are appending on
* the reassembly queue.
*
* If PDAPI this means we need to add m to the end of the data.
* Increase the length in the control AND increment the sb_cc.
* Otherwise sb is NULL and all we need to do is put it at the end
* of the mbuf chain.
*/
int len = 0;
struct mbuf *mm, *tail = NULL, *prev = NULL;
if (inp) {
SCTP_INP_READ_LOCK(inp);
}
if (control == NULL) {
get_out:
if (inp) {
SCTP_INP_READ_UNLOCK(inp);
}
return (-1);
}
if (inp && (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_CANT_READ)) {
SCTP_INP_READ_UNLOCK(inp);
return (0);
}
if (control->end_added) {
/* huh this one is complete? */
goto get_out;
}
mm = m;
if (mm == NULL) {
goto get_out;
}
while (mm) {
if (SCTP_BUF_LEN(mm) == 0) {
/* Skip mbufs with NO lenght */
if (prev == NULL) {
/* First one */
m = sctp_m_free(mm);
mm = m;
} else {
SCTP_BUF_NEXT(prev) = sctp_m_free(mm);
mm = SCTP_BUF_NEXT(prev);
}
continue;
}
prev = mm;
len += SCTP_BUF_LEN(mm);
if (sb) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBALLOC, SCTP_BUF_LEN(mm));
}
sctp_sballoc(stcb, sb, mm);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(sb, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
}
}
mm = SCTP_BUF_NEXT(mm);
}
if (prev) {
tail = prev;
} else {
/* Really there should always be a prev */
if (m == NULL) {
/* Huh nothing left? */
#ifdef INVARIANTS
panic("Nothing left to add?");
#else
goto get_out;
#endif
}
tail = m;
}
if (control->tail_mbuf) {
/* append */
SCTP_BUF_NEXT(control->tail_mbuf) = m;
control->tail_mbuf = tail;
} else {
/* nothing there */
#ifdef INVARIANTS
if (control->data != NULL) {
panic("This should NOT happen");
}
#endif
control->data = m;
control->tail_mbuf = tail;
}
atomic_add_int(&control->length, len);
if (end) {
/* message is complete */
if (stcb && (control == stcb->asoc.control_pdapi)) {
stcb->asoc.control_pdapi = NULL;
}
control->held_length = 0;
control->end_added = 1;
}
if (stcb == NULL) {
control->do_not_ref_stcb = 1;
}
/*
* When we are appending in partial delivery, the cum-ack is used
* for the actual pd-api highest tsn on this mbuf. The true cum-ack
* is populated in the outbound sinfo structure from the true cumack
* if the association exists...
*/
control->sinfo_tsn = control->sinfo_cumtsn = ctls_cumack;
if (inp) {
SCTP_INP_READ_UNLOCK(inp);
}
if (inp && inp->sctp_socket) {
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_ZERO_COPY_ACTIVE)) {
SCTP_ZERO_COPY_EVENT(inp, inp->sctp_socket);
} else {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
so = SCTP_INP_SO(inp);
if (stcb) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
}
SCTP_SOCKET_LOCK(so, 1);
if (stcb) {
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
SCTP_SOCKET_UNLOCK(so, 1);
return (0);
}
#endif
sctp_sorwakeup(inp, inp->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
SCTP_SOCKET_UNLOCK(so, 1);
#endif
}
}
return (0);
}
/*************HOLD THIS COMMENT FOR PATCH FILE OF
*************ALTERNATE ROUTING CODE
*/
/*************HOLD THIS COMMENT FOR END OF PATCH FILE OF
*************ALTERNATE ROUTING CODE
*/
struct mbuf *
sctp_generate_invmanparam(int err)
{
/* Return a MBUF with a invalid mandatory parameter */
struct mbuf *m;
m = sctp_get_mbuf_for_msg(sizeof(struct sctp_paramhdr), 0, M_DONTWAIT, 1, MT_DATA);
if (m) {
struct sctp_paramhdr *ph;
SCTP_BUF_LEN(m) = sizeof(struct sctp_paramhdr);
ph = mtod(m, struct sctp_paramhdr *);
ph->param_length = htons(sizeof(struct sctp_paramhdr));
ph->param_type = htons(err);
}
return (m);
}
#ifdef SCTP_MBCNT_LOGGING
void
sctp_free_bufspace(struct sctp_tcb *stcb, struct sctp_association *asoc,
struct sctp_tmit_chunk *tp1, int chk_cnt)
{
if (tp1->data == NULL) {
return;
}
asoc->chunks_on_out_queue -= chk_cnt;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBCNT_LOGGING_ENABLE) {
sctp_log_mbcnt(SCTP_LOG_MBCNT_DECREASE,
asoc->total_output_queue_size,
tp1->book_size,
0,
tp1->mbcnt);
}
if (asoc->total_output_queue_size >= tp1->book_size) {
atomic_add_int(&asoc->total_output_queue_size, -tp1->book_size);
} else {
asoc->total_output_queue_size = 0;
}
if (stcb->sctp_socket && (((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) ||
((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE)))) {
if (stcb->sctp_socket->so_snd.sb_cc >= tp1->book_size) {
stcb->sctp_socket->so_snd.sb_cc -= tp1->book_size;
} else {
stcb->sctp_socket->so_snd.sb_cc = 0;
}
}
}
#endif
int
sctp_release_pr_sctp_chunk(struct sctp_tcb *stcb, struct sctp_tmit_chunk *tp1,
uint8_t sent, int so_locked
#if !defined(__APPLE__) && !defined(SCTP_SO_LOCK_TESTING)
SCTP_UNUSED
#endif
)
{
struct sctp_stream_out *strq;
struct sctp_tmit_chunk *chk = NULL, *tp2;
struct sctp_stream_queue_pending *sp;
uint16_t stream = 0, seq = 0;
uint8_t foundeom = 0;
int ret_sz = 0;
int notdone;
int do_wakeup_routine = 0;
stream = tp1->rec.data.stream_number;
seq = tp1->rec.data.stream_seq;
do {
ret_sz += tp1->book_size;
if (tp1->data != NULL) {
if (tp1->sent < SCTP_DATAGRAM_RESEND) {
sctp_flight_size_decrease(tp1);
sctp_total_flight_decrease(stcb, tp1);
}
sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
stcb->asoc.peers_rwnd += tp1->send_size;
stcb->asoc.peers_rwnd += SCTP_BASE_SYSCTL(sctp_peer_chunk_oh);
if (sent) {
sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
} else {
sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
}
if (tp1->data) {
sctp_m_freem(tp1->data);
tp1->data = NULL;
}
do_wakeup_routine = 1;
if (PR_SCTP_BUF_ENABLED(tp1->flags)) {
stcb->asoc.sent_queue_cnt_removeable--;
}
}
tp1->sent = SCTP_FORWARD_TSN_SKIP;
if ((tp1->rec.data.rcv_flags & SCTP_DATA_NOT_FRAG) ==
SCTP_DATA_NOT_FRAG) {
/* not frag'ed we ae done */
notdone = 0;
foundeom = 1;
} else if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
/* end of frag, we are done */
notdone = 0;
foundeom = 1;
} else {
/*
* Its a begin or middle piece, we must mark all of
* it
*/
notdone = 1;
tp1 = TAILQ_NEXT(tp1, sctp_next);
}
} while (tp1 && notdone);
if (foundeom == 0) {
/*
* The multi-part message was scattered across the send and
* sent queue.
*/
TAILQ_FOREACH_SAFE(tp1, &stcb->asoc.send_queue, sctp_next, tp2) {
if ((tp1->rec.data.stream_number != stream) ||
(tp1->rec.data.stream_seq != seq)) {
break;
}
/*
* save to chk in case we have some on stream out
* queue. If so and we have an un-transmitted one we
* don't have to fudge the TSN.
*/
chk = tp1;
ret_sz += tp1->book_size;
sctp_free_bufspace(stcb, &stcb->asoc, tp1, 1);
if (sent) {
sctp_ulp_notify(SCTP_NOTIFY_SENT_DG_FAIL, stcb, 0, tp1, so_locked);
} else {
sctp_ulp_notify(SCTP_NOTIFY_UNSENT_DG_FAIL, stcb, 0, tp1, so_locked);
}
if (tp1->data) {
sctp_m_freem(tp1->data);
tp1->data = NULL;
}
/* No flight involved here book the size to 0 */
tp1->book_size = 0;
if (tp1->rec.data.rcv_flags & SCTP_DATA_LAST_FRAG) {
foundeom = 1;
}
do_wakeup_routine = 1;
tp1->sent = SCTP_FORWARD_TSN_SKIP;
TAILQ_REMOVE(&stcb->asoc.send_queue, tp1, sctp_next);
/*
* on to the sent queue so we can wait for it to be
* passed by.
*/
TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, tp1,
sctp_next);
stcb->asoc.send_queue_cnt--;
stcb->asoc.sent_queue_cnt++;
}
}
if (foundeom == 0) {
/*
* Still no eom found. That means there is stuff left on the
* stream out queue.. yuck.
*/
strq = &stcb->asoc.strmout[stream];
SCTP_TCB_SEND_LOCK(stcb);
TAILQ_FOREACH(sp, &strq->outqueue, next) {
/* FIXME: Shouldn't this be a serial number check? */
if (sp->strseq > seq) {
break;
}
/* Check if its our SEQ */
if (sp->strseq == seq) {
sp->discard_rest = 1;
/*
* We may need to put a chunk on the queue
* that holds the TSN that would have been
* sent with the LAST bit.
*/
if (chk == NULL) {
/* Yep, we have to */
sctp_alloc_a_chunk(stcb, chk);
if (chk == NULL) {
/*
* we are hosed. All we can
* do is nothing.. which
* will cause an abort if
* the peer is paying
* attention.
*/
goto oh_well;
}
memset(chk, 0, sizeof(*chk));
chk->rec.data.rcv_flags = SCTP_DATA_LAST_FRAG;
chk->sent = SCTP_FORWARD_TSN_SKIP;
chk->asoc = &stcb->asoc;
chk->rec.data.stream_seq = sp->strseq;
chk->rec.data.stream_number = sp->stream;
chk->rec.data.payloadtype = sp->ppid;
chk->rec.data.context = sp->context;
chk->flags = sp->act_flags;
if (sp->net)
chk->whoTo = sp->net;
else
chk->whoTo = stcb->asoc.primary_destination;
atomic_add_int(&chk->whoTo->ref_count, 1);
chk->rec.data.TSN_seq = atomic_fetchadd_int(&stcb->asoc.sending_seq, 1);
stcb->asoc.pr_sctp_cnt++;
chk->pr_sctp_on = 1;
TAILQ_INSERT_TAIL(&stcb->asoc.sent_queue, chk, sctp_next);
stcb->asoc.sent_queue_cnt++;
stcb->asoc.pr_sctp_cnt++;
} else {
chk->rec.data.rcv_flags |= SCTP_DATA_LAST_FRAG;
}
oh_well:
if (sp->data) {
/*
* Pull any data to free up the SB
* and allow sender to "add more"
* while we will throw away :-)
*/
sctp_free_spbufspace(stcb, &stcb->asoc,
sp);
ret_sz += sp->length;
do_wakeup_routine = 1;
sp->some_taken = 1;
sctp_m_freem(sp->data);
sp->data = NULL;
sp->tail_mbuf = NULL;
sp->length = 0;
}
break;
}
} /* End tailq_foreach */
SCTP_TCB_SEND_UNLOCK(stcb);
}
if (do_wakeup_routine) {
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
struct socket *so;
so = SCTP_INP_SO(stcb->sctp_ep);
if (!so_locked) {
atomic_add_int(&stcb->asoc.refcnt, 1);
SCTP_TCB_UNLOCK(stcb);
SCTP_SOCKET_LOCK(so, 1);
SCTP_TCB_LOCK(stcb);
atomic_subtract_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & SCTP_STATE_CLOSED_SOCKET) {
/* assoc was freed while we were unlocked */
SCTP_SOCKET_UNLOCK(so, 1);
return (ret_sz);
}
}
#endif
sctp_sowwakeup(stcb->sctp_ep, stcb->sctp_socket);
#if defined(__APPLE__) || defined(SCTP_SO_LOCK_TESTING)
if (!so_locked) {
SCTP_SOCKET_UNLOCK(so, 1);
}
#endif
}
return (ret_sz);
}
/*
* checks to see if the given address, sa, is one that is currently known by
* the kernel note: can't distinguish the same address on multiple interfaces
* and doesn't handle multiple addresses with different zone/scope id's note:
* ifa_ifwithaddr() compares the entire sockaddr struct
*/
struct sctp_ifa *
sctp_find_ifa_in_ep(struct sctp_inpcb *inp, struct sockaddr *addr,
int holds_lock)
{
struct sctp_laddr *laddr;
if (holds_lock == 0) {
SCTP_INP_RLOCK(inp);
}
LIST_FOREACH(laddr, &inp->sctp_addr_list, sctp_nxt_addr) {
if (laddr->ifa == NULL)
continue;
if (addr->sa_family != laddr->ifa->address.sa.sa_family)
continue;
#ifdef INET
if (addr->sa_family == AF_INET) {
if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
laddr->ifa->address.sin.sin_addr.s_addr) {
/* found him. */
if (holds_lock == 0) {
SCTP_INP_RUNLOCK(inp);
}
return (laddr->ifa);
break;
}
}
#endif
#ifdef INET6
if (addr->sa_family == AF_INET6) {
if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
&laddr->ifa->address.sin6)) {
/* found him. */
if (holds_lock == 0) {
SCTP_INP_RUNLOCK(inp);
}
return (laddr->ifa);
break;
}
}
#endif
}
if (holds_lock == 0) {
SCTP_INP_RUNLOCK(inp);
}
return (NULL);
}
uint32_t
sctp_get_ifa_hash_val(struct sockaddr *addr)
{
switch (addr->sa_family) {
#ifdef INET
case AF_INET:
{
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)addr;
return (sin->sin_addr.s_addr ^ (sin->sin_addr.s_addr >> 16));
}
#endif
#ifdef INET6
case INET6:
{
struct sockaddr_in6 *sin6;
uint32_t hash_of_addr;
sin6 = (struct sockaddr_in6 *)addr;
hash_of_addr = (sin6->sin6_addr.s6_addr32[0] +
sin6->sin6_addr.s6_addr32[1] +
sin6->sin6_addr.s6_addr32[2] +
sin6->sin6_addr.s6_addr32[3]);
hash_of_addr = (hash_of_addr ^ (hash_of_addr >> 16));
return (hash_of_addr);
}
#endif
default:
break;
}
return (0);
}
struct sctp_ifa *
sctp_find_ifa_by_addr(struct sockaddr *addr, uint32_t vrf_id, int holds_lock)
{
struct sctp_ifa *sctp_ifap;
struct sctp_vrf *vrf;
struct sctp_ifalist *hash_head;
uint32_t hash_of_addr;
if (holds_lock == 0)
SCTP_IPI_ADDR_RLOCK();
vrf = sctp_find_vrf(vrf_id);
if (vrf == NULL) {
stage_right:
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (NULL);
}
hash_of_addr = sctp_get_ifa_hash_val(addr);
hash_head = &vrf->vrf_addr_hash[(hash_of_addr & vrf->vrf_addr_hashmark)];
if (hash_head == NULL) {
SCTP_PRINTF("hash_of_addr:%x mask:%x table:%x - ",
hash_of_addr, (uint32_t) vrf->vrf_addr_hashmark,
(uint32_t) (hash_of_addr & vrf->vrf_addr_hashmark));
sctp_print_address(addr);
SCTP_PRINTF("No such bucket for address\n");
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (NULL);
}
LIST_FOREACH(sctp_ifap, hash_head, next_bucket) {
if (sctp_ifap == NULL) {
#ifdef INVARIANTS
panic("Huh LIST_FOREACH corrupt");
goto stage_right;
#else
SCTP_PRINTF("LIST corrupt of sctp_ifap's?\n");
goto stage_right;
#endif
}
if (addr->sa_family != sctp_ifap->address.sa.sa_family)
continue;
#ifdef INET
if (addr->sa_family == AF_INET) {
if (((struct sockaddr_in *)addr)->sin_addr.s_addr ==
sctp_ifap->address.sin.sin_addr.s_addr) {
/* found him. */
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (sctp_ifap);
break;
}
}
#endif
#ifdef INET6
if (addr->sa_family == AF_INET6) {
if (SCTP6_ARE_ADDR_EQUAL((struct sockaddr_in6 *)addr,
&sctp_ifap->address.sin6)) {
/* found him. */
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (sctp_ifap);
break;
}
}
#endif
}
if (holds_lock == 0)
SCTP_IPI_ADDR_RUNLOCK();
return (NULL);
}
static void
sctp_user_rcvd(struct sctp_tcb *stcb, uint32_t * freed_so_far, int hold_rlock,
uint32_t rwnd_req)
{
/* User pulled some data, do we need a rwnd update? */
int r_unlocked = 0;
uint32_t dif, rwnd;
struct socket *so = NULL;
if (stcb == NULL)
return;
atomic_add_int(&stcb->asoc.refcnt, 1);
if (stcb->asoc.state & (SCTP_STATE_ABOUT_TO_BE_FREED |
SCTP_STATE_SHUTDOWN_RECEIVED |
SCTP_STATE_SHUTDOWN_ACK_SENT)) {
/* Pre-check If we are freeing no update */
goto no_lock;
}
SCTP_INP_INCR_REF(stcb->sctp_ep);
if ((stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
goto out;
}
so = stcb->sctp_socket;
if (so == NULL) {
goto out;
}
atomic_add_int(&stcb->freed_by_sorcv_sincelast, *freed_so_far);
/* Have you have freed enough to look */
*freed_so_far = 0;
/* Yep, its worth a look and the lock overhead */
/* Figure out what the rwnd would be */
rwnd = sctp_calc_rwnd(stcb, &stcb->asoc);
if (rwnd >= stcb->asoc.my_last_reported_rwnd) {
dif = rwnd - stcb->asoc.my_last_reported_rwnd;
} else {
dif = 0;
}
if (dif >= rwnd_req) {
if (hold_rlock) {
SCTP_INP_READ_UNLOCK(stcb->sctp_ep);
r_unlocked = 1;
}
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
/*
* One last check before we allow the guy possibly
* to get in. There is a race, where the guy has not
* reached the gate. In that case
*/
goto out;
}
SCTP_TCB_LOCK(stcb);
if (stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
/* No reports here */
SCTP_TCB_UNLOCK(stcb);
goto out;
}
SCTP_STAT_INCR(sctps_wu_sacks_sent);
sctp_send_sack(stcb, SCTP_SO_LOCKED);
sctp_chunk_output(stcb->sctp_ep, stcb,
SCTP_OUTPUT_FROM_USR_RCVD, SCTP_SO_LOCKED);
/* make sure no timer is running */
sctp_timer_stop(SCTP_TIMER_TYPE_RECV, stcb->sctp_ep, stcb, NULL, SCTP_FROM_SCTPUTIL + SCTP_LOC_6);
SCTP_TCB_UNLOCK(stcb);
} else {
/* Update how much we have pending */
stcb->freed_by_sorcv_sincelast = dif;
}
out:
if (so && r_unlocked && hold_rlock) {
SCTP_INP_READ_LOCK(stcb->sctp_ep);
}
SCTP_INP_DECR_REF(stcb->sctp_ep);
no_lock:
atomic_add_int(&stcb->asoc.refcnt, -1);
return;
}
int
sctp_sorecvmsg(struct socket *so,
struct uio *uio,
struct mbuf **mp,
struct sockaddr *from,
int fromlen,
int *msg_flags,
struct sctp_sndrcvinfo *sinfo,
int filling_sinfo)
{
/*
* MSG flags we will look at MSG_DONTWAIT - non-blocking IO.
* MSG_PEEK - Look don't touch :-D (only valid with OUT mbuf copy
* mp=NULL thus uio is the copy method to userland) MSG_WAITALL - ??
* On the way out we may send out any combination of:
* MSG_NOTIFICATION MSG_EOR
*
*/
struct sctp_inpcb *inp = NULL;
int my_len = 0;
int cp_len = 0, error = 0;
struct sctp_queued_to_read *control = NULL, *ctl = NULL, *nxt = NULL;
struct mbuf *m = NULL;
struct sctp_tcb *stcb = NULL;
int wakeup_read_socket = 0;
int freecnt_applied = 0;
int out_flags = 0, in_flags = 0;
int block_allowed = 1;
uint32_t freed_so_far = 0;
uint32_t copied_so_far = 0;
int in_eeor_mode = 0;
int no_rcv_needed = 0;
uint32_t rwnd_req = 0;
int hold_sblock = 0;
int hold_rlock = 0;
int slen = 0;
uint32_t held_length = 0;
int sockbuf_lock = 0;
if (uio == NULL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
return (EINVAL);
}
if (msg_flags) {
in_flags = *msg_flags;
if (in_flags & MSG_PEEK)
SCTP_STAT_INCR(sctps_read_peeks);
} else {
in_flags = 0;
}
slen = uio->uio_resid;
/* Pull in and set up our int flags */
if (in_flags & MSG_OOB) {
/* Out of band's NOT supported */
return (EOPNOTSUPP);
}
if ((in_flags & MSG_PEEK) && (mp != NULL)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
return (EINVAL);
}
if ((in_flags & (MSG_DONTWAIT
| MSG_NBIO
)) ||
SCTP_SO_IS_NBIO(so)) {
block_allowed = 0;
}
/* setup the endpoint */
inp = (struct sctp_inpcb *)so->so_pcb;
if (inp == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EFAULT);
return (EFAULT);
}
rwnd_req = (SCTP_SB_LIMIT_RCV(so) >> SCTP_RWND_HIWAT_SHIFT);
/* Must be at least a MTU's worth */
if (rwnd_req < SCTP_MIN_RWND)
rwnd_req = SCTP_MIN_RWND;
in_eeor_mode = sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXPLICIT_EOR);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_SORECV_ENTER,
rwnd_req, in_eeor_mode, so->so_rcv.sb_cc, uio->uio_resid);
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
sctp_misc_ints(SCTP_SORECV_ENTERPL,
rwnd_req, block_allowed, so->so_rcv.sb_cc, uio->uio_resid);
}
error = sblock(&so->so_rcv, (block_allowed ? SBL_WAIT : 0));
sockbuf_lock = 1;
if (error) {
goto release_unlocked;
}
restart:
restart_nosblocks:
if (hold_sblock == 0) {
SOCKBUF_LOCK(&so->so_rcv);
hold_sblock = 1;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_ALLGONE)) {
goto out;
}
if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) && (so->so_rcv.sb_cc == 0)) {
if (so->so_error) {
error = so->so_error;
if ((in_flags & MSG_PEEK) == 0)
so->so_error = 0;
goto out;
} else {
if (so->so_rcv.sb_cc == 0) {
/* indicate EOF */
error = 0;
goto out;
}
}
}
if ((so->so_rcv.sb_cc <= held_length) && block_allowed) {
/* we need to wait for data */
if ((so->so_rcv.sb_cc == 0) &&
((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL))) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
/*
* For active open side clear flags for
* re-use passive open is blocked by
* connect.
*/
if (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED) {
/*
* You were aborted, passive side
* always hits here
*/
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
error = ECONNRESET;
}
so->so_state &= ~(SS_ISCONNECTING |
SS_ISDISCONNECTING |
SS_ISCONFIRMING |
SS_ISCONNECTED);
if (error == 0) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOTCONN);
error = ENOTCONN;
}
}
goto out;
}
}
error = sbwait(&so->so_rcv);
if (error) {
goto out;
}
held_length = 0;
goto restart_nosblocks;
} else if (so->so_rcv.sb_cc == 0) {
if (so->so_error) {
error = so->so_error;
if ((in_flags & MSG_PEEK) == 0)
so->so_error = 0;
} else {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_TCPTYPE) ||
(inp->sctp_flags & SCTP_PCB_FLAGS_IN_TCPPOOL)) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_CONNECTED) == 0) {
/*
* For active open side clear flags
* for re-use passive open is
* blocked by connect.
*/
if (inp->sctp_flags & SCTP_PCB_FLAGS_WAS_ABORTED) {
/*
* You were aborted, passive
* side always hits here
*/
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ECONNRESET);
error = ECONNRESET;
}
so->so_state &= ~(SS_ISCONNECTING |
SS_ISDISCONNECTING |
SS_ISCONFIRMING |
SS_ISCONNECTED);
if (error == 0) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_WAS_CONNECTED) == 0) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOTCONN);
error = ENOTCONN;
}
}
goto out;
}
}
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EWOULDBLOCK);
error = EWOULDBLOCK;
}
goto out;
}
if (hold_sblock == 1) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
/* we possibly have data we can read */
/* sa_ignore FREED_MEMORY */
control = TAILQ_FIRST(&inp->read_queue);
if (control == NULL) {
/*
* This could be happening since the appender did the
* increment but as not yet did the tailq insert onto the
* read_queue
*/
if (hold_rlock == 0) {
SCTP_INP_READ_LOCK(inp);
}
control = TAILQ_FIRST(&inp->read_queue);
if ((control == NULL) && (so->so_rcv.sb_cc != 0)) {
#ifdef INVARIANTS
panic("Huh, its non zero and nothing on control?");
#endif
so->so_rcv.sb_cc = 0;
}
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
goto restart;
}
if ((control->length == 0) &&
(control->do_not_ref_stcb)) {
/*
* Clean up code for freeing assoc that left behind a
* pdapi.. maybe a peer in EEOR that just closed after
* sending and never indicated a EOR.
*/
if (hold_rlock == 0) {
hold_rlock = 1;
SCTP_INP_READ_LOCK(inp);
}
control->held_length = 0;
if (control->data) {
/* Hmm there is data here .. fix */
struct mbuf *m_tmp;
int cnt = 0;
m_tmp = control->data;
while (m_tmp) {
cnt += SCTP_BUF_LEN(m_tmp);
if (SCTP_BUF_NEXT(m_tmp) == NULL) {
control->tail_mbuf = m_tmp;
control->end_added = 1;
}
m_tmp = SCTP_BUF_NEXT(m_tmp);
}
control->length = cnt;
} else {
/* remove it */
TAILQ_REMOVE(&inp->read_queue, control, next);
/* Add back any hiddend data */
sctp_free_remote_addr(control->whoFrom);
sctp_free_a_readq(stcb, control);
}
if (hold_rlock) {
hold_rlock = 0;
SCTP_INP_READ_UNLOCK(inp);
}
goto restart;
}
if ((control->length == 0) &&
(control->end_added == 1)) {
/*
* Do we also need to check for (control->pdapi_aborted ==
* 1)?
*/
if (hold_rlock == 0) {
hold_rlock = 1;
SCTP_INP_READ_LOCK(inp);
}
TAILQ_REMOVE(&inp->read_queue, control, next);
if (control->data) {
#ifdef INVARIANTS
panic("control->data not null but control->length == 0");
#else
SCTP_PRINTF("Strange, data left in the control buffer. Cleaning up.\n");
sctp_m_freem(control->data);
control->data = NULL;
#endif
}
if (control->aux_data) {
sctp_m_free(control->aux_data);
control->aux_data = NULL;
}
sctp_free_remote_addr(control->whoFrom);
sctp_free_a_readq(stcb, control);
if (hold_rlock) {
hold_rlock = 0;
SCTP_INP_READ_UNLOCK(inp);
}
goto restart;
}
if (control->length == 0) {
if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE)) &&
(filling_sinfo)) {
/* find a more suitable one then this */
ctl = TAILQ_NEXT(control, next);
while (ctl) {
if ((ctl->stcb != control->stcb) && (ctl->length) &&
(ctl->some_taken ||
(ctl->spec_flags & M_NOTIFICATION) ||
((ctl->do_not_ref_stcb == 0) &&
(ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))
) {
/*-
* If we have a different TCB next, and there is data
* present. If we have already taken some (pdapi), OR we can
* ref the tcb and no delivery as started on this stream, we
* take it. Note we allow a notification on a different
* assoc to be delivered..
*/
control = ctl;
goto found_one;
} else if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_INTERLEAVE_STRMS)) &&
(ctl->length) &&
((ctl->some_taken) ||
((ctl->do_not_ref_stcb == 0) &&
((ctl->spec_flags & M_NOTIFICATION) == 0) &&
(ctl->stcb->asoc.strmin[ctl->sinfo_stream].delivery_started == 0)))) {
/*-
* If we have the same tcb, and there is data present, and we
* have the strm interleave feature present. Then if we have
* taken some (pdapi) or we can refer to tht tcb AND we have
* not started a delivery for this stream, we can take it.
* Note we do NOT allow a notificaiton on the same assoc to
* be delivered.
*/
control = ctl;
goto found_one;
}
ctl = TAILQ_NEXT(ctl, next);
}
}
/*
* if we reach here, not suitable replacement is available
* <or> fragment interleave is NOT on. So stuff the sb_cc
* into the our held count, and its time to sleep again.
*/
held_length = so->so_rcv.sb_cc;
control->held_length = so->so_rcv.sb_cc;
goto restart;
}
/* Clear the held length since there is something to read */
control->held_length = 0;
if (hold_rlock) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
found_one:
/*
* If we reach here, control has a some data for us to read off.
* Note that stcb COULD be NULL.
*/
control->some_taken++;
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
stcb = control->stcb;
if (stcb) {
if ((control->do_not_ref_stcb == 0) &&
(stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED)) {
if (freecnt_applied == 0)
stcb = NULL;
} else if (control->do_not_ref_stcb == 0) {
/* you can't free it on me please */
/*
* The lock on the socket buffer protects us so the
* free code will stop. But since we used the
* socketbuf lock and the sender uses the tcb_lock
* to increment, we need to use the atomic add to
* the refcnt
*/
if (freecnt_applied) {
#ifdef INVARIANTS
panic("refcnt already incremented");
#else
SCTP_PRINTF("refcnt already incremented?\n");
#endif
} else {
atomic_add_int(&stcb->asoc.refcnt, 1);
freecnt_applied = 1;
}
/*
* Setup to remember how much we have not yet told
* the peer our rwnd has opened up. Note we grab the
* value from the tcb from last time. Note too that
* sack sending clears this when a sack is sent,
* which is fine. Once we hit the rwnd_req, we then
* will go to the sctp_user_rcvd() that will not
* lock until it KNOWs it MUST send a WUP-SACK.
*/
freed_so_far = stcb->freed_by_sorcv_sincelast;
stcb->freed_by_sorcv_sincelast = 0;
}
}
if (stcb &&
((control->spec_flags & M_NOTIFICATION) == 0) &&
control->do_not_ref_stcb == 0) {
stcb->asoc.strmin[control->sinfo_stream].delivery_started = 1;
}
/* First lets get off the sinfo and sockaddr info */
if ((sinfo) && filling_sinfo) {
memcpy(sinfo, control, sizeof(struct sctp_nonpad_sndrcvinfo));
nxt = TAILQ_NEXT(control, next);
if (sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) {
struct sctp_extrcvinfo *s_extra;
s_extra = (struct sctp_extrcvinfo *)sinfo;
if ((nxt) &&
(nxt->length)) {
s_extra->sreinfo_next_flags = SCTP_NEXT_MSG_AVAIL;
if (nxt->sinfo_flags & SCTP_UNORDERED) {
s_extra->sreinfo_next_flags |= SCTP_NEXT_MSG_IS_UNORDERED;
}
if (nxt->spec_flags & M_NOTIFICATION) {
s_extra->sreinfo_next_flags |= SCTP_NEXT_MSG_IS_NOTIFICATION;
}
s_extra->sreinfo_next_aid = nxt->sinfo_assoc_id;
s_extra->sreinfo_next_length = nxt->length;
s_extra->sreinfo_next_ppid = nxt->sinfo_ppid;
s_extra->sreinfo_next_stream = nxt->sinfo_stream;
if (nxt->tail_mbuf != NULL) {
if (nxt->end_added) {
s_extra->sreinfo_next_flags |= SCTP_NEXT_MSG_ISCOMPLETE;
}
}
} else {
/*
* we explicitly 0 this, since the memcpy
* got some other things beyond the older
* sinfo_ that is on the control's structure
* :-D
*/
nxt = NULL;
s_extra->sreinfo_next_flags = SCTP_NO_NEXT_MSG;
s_extra->sreinfo_next_aid = 0;
s_extra->sreinfo_next_length = 0;
s_extra->sreinfo_next_ppid = 0;
s_extra->sreinfo_next_stream = 0;
}
}
/*
* update off the real current cum-ack, if we have an stcb.
*/
if ((control->do_not_ref_stcb == 0) && stcb)
sinfo->sinfo_cumtsn = stcb->asoc.cumulative_tsn;
/*
* mask off the high bits, we keep the actual chunk bits in
* there.
*/
sinfo->sinfo_flags &= 0x00ff;
if ((control->sinfo_flags >> 8) & SCTP_DATA_UNORDERED) {
sinfo->sinfo_flags |= SCTP_UNORDERED;
}
}
#ifdef SCTP_ASOCLOG_OF_TSNS
{
int index, newindex;
struct sctp_pcbtsn_rlog *entry;
do {
index = inp->readlog_index;
newindex = index + 1;
if (newindex >= SCTP_READ_LOG_SIZE) {
newindex = 0;
}
} while (atomic_cmpset_int(&inp->readlog_index, index, newindex) == 0);
entry = &inp->readlog[index];
entry->vtag = control->sinfo_assoc_id;
entry->strm = control->sinfo_stream;
entry->seq = control->sinfo_ssn;
entry->sz = control->length;
entry->flgs = control->sinfo_flags;
}
#endif
if (fromlen && from) {
cp_len = min((size_t)fromlen, (size_t)control->whoFrom->ro._l_addr.sa.sa_len);
switch (control->whoFrom->ro._l_addr.sa.sa_family) {
#ifdef INET6
case AF_INET6:
((struct sockaddr_in6 *)from)->sin6_port = control->port_from;
break;
#endif
#ifdef INET
case AF_INET:
((struct sockaddr_in *)from)->sin_port = control->port_from;
break;
#endif
default:
break;
}
memcpy(from, &control->whoFrom->ro._l_addr, cp_len);
#if defined(INET) && defined(INET6)
if ((sctp_is_feature_on(inp, SCTP_PCB_FLAGS_NEEDS_MAPPED_V4)) &&
(from->sa_family == AF_INET) &&
((size_t)fromlen >= sizeof(struct sockaddr_in6))) {
struct sockaddr_in *sin;
struct sockaddr_in6 sin6;
sin = (struct sockaddr_in *)from;
bzero(&sin6, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_len = sizeof(struct sockaddr_in6);
sin6.sin6_addr.s6_addr32[2] = htonl(0xffff);
bcopy(&sin->sin_addr,
&sin6.sin6_addr.s6_addr32[3],
sizeof(sin6.sin6_addr.s6_addr32[3]));
sin6.sin6_port = sin->sin_port;
memcpy(from, &sin6, sizeof(struct sockaddr_in6));
}
#endif
#ifdef INET6
{
struct sockaddr_in6 lsa6, *from6;
from6 = (struct sockaddr_in6 *)from;
sctp_recover_scope_mac(from6, (&lsa6));
}
#endif
}
/* now copy out what data we can */
if (mp == NULL) {
/* copy out each mbuf in the chain up to length */
get_more_data:
m = control->data;
while (m) {
/* Move out all we can */
cp_len = (int)uio->uio_resid;
my_len = (int)SCTP_BUF_LEN(m);
if (cp_len > my_len) {
/* not enough in this buf */
cp_len = my_len;
}
if (hold_rlock) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
if (cp_len > 0)
error = uiomove(mtod(m, char *), cp_len, uio);
/* re-read */
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE) {
goto release;
}
if ((control->do_not_ref_stcb == 0) && stcb &&
stcb->asoc.state & SCTP_STATE_ABOUT_TO_BE_FREED) {
no_rcv_needed = 1;
}
if (error) {
/* error we are out of here */
goto release;
}
if ((SCTP_BUF_NEXT(m) == NULL) &&
(cp_len >= SCTP_BUF_LEN(m)) &&
((control->end_added == 0) ||
(control->end_added &&
(TAILQ_NEXT(control, next) == NULL)))
) {
SCTP_INP_READ_LOCK(inp);
hold_rlock = 1;
}
if (cp_len == SCTP_BUF_LEN(m)) {
if ((SCTP_BUF_NEXT(m) == NULL) &&
(control->end_added)) {
out_flags |= MSG_EOR;
if ((control->do_not_ref_stcb == 0) &&
(control->stcb != NULL) &&
((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
}
if (control->spec_flags & M_NOTIFICATION) {
out_flags |= MSG_NOTIFICATION;
}
/* we ate up the mbuf */
if (in_flags & MSG_PEEK) {
/* just looking */
m = SCTP_BUF_NEXT(m);
copied_so_far += cp_len;
} else {
/* dispose of the mbuf */
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
}
sctp_sbfree(control, stcb, &so->so_rcv, m);
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
}
copied_so_far += cp_len;
freed_so_far += cp_len;
freed_so_far += MSIZE;
atomic_subtract_int(&control->length, cp_len);
control->data = sctp_m_free(m);
m = control->data;
/*
* been through it all, must hold sb
* lock ok to null tail
*/
if (control->data == NULL) {
#ifdef INVARIANTS
if ((control->end_added == 0) ||
(TAILQ_NEXT(control, next) == NULL)) {
/*
* If the end is not
* added, OR the
* next is NOT null
* we MUST have the
* lock.
*/
if (mtx_owned(&inp->inp_rdata_mtx) == 0) {
panic("Hmm we don't own the lock?");
}
}
#endif
control->tail_mbuf = NULL;
#ifdef INVARIANTS
if ((control->end_added) && ((out_flags & MSG_EOR) == 0)) {
panic("end_added, nothing left and no MSG_EOR");
}
#endif
}
}
} else {
/* Do we need to trim the mbuf? */
if (control->spec_flags & M_NOTIFICATION) {
out_flags |= MSG_NOTIFICATION;
}
if ((in_flags & MSG_PEEK) == 0) {
SCTP_BUF_RESV_UF(m, cp_len);
SCTP_BUF_LEN(m) -= cp_len;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, cp_len);
}
atomic_subtract_int(&so->so_rcv.sb_cc, cp_len);
if ((control->do_not_ref_stcb == 0) &&
stcb) {
atomic_subtract_int(&stcb->asoc.sb_cc, cp_len);
}
copied_so_far += cp_len;
freed_so_far += cp_len;
freed_so_far += MSIZE;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv, control->do_not_ref_stcb ? NULL : stcb,
SCTP_LOG_SBRESULT, 0);
}
atomic_subtract_int(&control->length, cp_len);
} else {
copied_so_far += cp_len;
}
}
if ((out_flags & MSG_EOR) || (uio->uio_resid == 0)) {
break;
}
if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
(control->do_not_ref_stcb == 0) &&
(freed_so_far >= rwnd_req)) {
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
}
} /* end while(m) */
/*
* At this point we have looked at it all and we either have
* a MSG_EOR/or read all the user wants... <OR>
* control->length == 0.
*/
if ((out_flags & MSG_EOR) && ((in_flags & MSG_PEEK) == 0)) {
/* we are done with this control */
if (control->length == 0) {
if (control->data) {
#ifdef INVARIANTS
panic("control->data not null at read eor?");
#else
SCTP_PRINTF("Strange, data left in the control buffer .. invarients would panic?\n");
sctp_m_freem(control->data);
control->data = NULL;
#endif
}
done_with_control:
if (TAILQ_NEXT(control, next) == NULL) {
/*
* If we don't have a next we need a
* lock, if there is a next
* interrupt is filling ahead of us
* and we don't need a lock to
* remove this guy (which is the
* head of the queue).
*/
if (hold_rlock == 0) {
SCTP_INP_READ_LOCK(inp);
hold_rlock = 1;
}
}
TAILQ_REMOVE(&inp->read_queue, control, next);
/* Add back any hiddend data */
if (control->held_length) {
held_length = 0;
control->held_length = 0;
wakeup_read_socket = 1;
}
if (control->aux_data) {
sctp_m_free(control->aux_data);
control->aux_data = NULL;
}
no_rcv_needed = control->do_not_ref_stcb;
sctp_free_remote_addr(control->whoFrom);
control->data = NULL;
sctp_free_a_readq(stcb, control);
control = NULL;
if ((freed_so_far >= rwnd_req) &&
(no_rcv_needed == 0))
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
} else {
/*
* The user did not read all of this
* message, turn off the returned MSG_EOR
* since we are leaving more behind on the
* control to read.
*/
#ifdef INVARIANTS
if (control->end_added &&
(control->data == NULL) &&
(control->tail_mbuf == NULL)) {
panic("Gak, control->length is corrupt?");
}
#endif
no_rcv_needed = control->do_not_ref_stcb;
out_flags &= ~MSG_EOR;
}
}
if (out_flags & MSG_EOR) {
goto release;
}
if ((uio->uio_resid == 0) ||
((in_eeor_mode) && (copied_so_far >= max(so->so_rcv.sb_lowat, 1)))
) {
goto release;
}
/*
* If I hit here the receiver wants more and this message is
* NOT done (pd-api). So two questions. Can we block? if not
* we are done. Did the user NOT set MSG_WAITALL?
*/
if (block_allowed == 0) {
goto release;
}
/*
* We need to wait for more data a few things: - We don't
* sbunlock() so we don't get someone else reading. - We
* must be sure to account for the case where what is added
* is NOT to our control when we wakeup.
*/
/*
* Do we need to tell the transport a rwnd update might be
* needed before we go to sleep?
*/
if (((stcb) && (in_flags & MSG_PEEK) == 0) &&
((freed_so_far >= rwnd_req) &&
(control->do_not_ref_stcb == 0) &&
(no_rcv_needed == 0))) {
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
}
wait_some_more:
if (so->so_rcv.sb_state & SBS_CANTRCVMORE) {
goto release;
}
if (inp->sctp_flags & SCTP_PCB_FLAGS_SOCKET_GONE)
goto release;
if (hold_rlock == 1) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
if (hold_sblock == 0) {
SOCKBUF_LOCK(&so->so_rcv);
hold_sblock = 1;
}
if ((copied_so_far) && (control->length == 0) &&
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_FRAG_INTERLEAVE))) {
goto release;
}
if (so->so_rcv.sb_cc <= control->held_length) {
error = sbwait(&so->so_rcv);
if (error) {
goto release;
}
control->held_length = 0;
}
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
if (control->length == 0) {
/* still nothing here */
if (control->end_added == 1) {
/* he aborted, or is done i.e.did a shutdown */
out_flags |= MSG_EOR;
if (control->pdapi_aborted) {
if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
out_flags |= MSG_TRUNC;
} else {
if ((control->do_not_ref_stcb == 0) && ((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
}
goto done_with_control;
}
if (so->so_rcv.sb_cc > held_length) {
control->held_length = so->so_rcv.sb_cc;
held_length = 0;
}
goto wait_some_more;
} else if (control->data == NULL) {
/*
* we must re-sync since data is probably being
* added
*/
SCTP_INP_READ_LOCK(inp);
if ((control->length > 0) && (control->data == NULL)) {
/*
* big trouble.. we have the lock and its
* corrupt?
*/
#ifdef INVARIANTS
panic("Impossible data==NULL length !=0");
#endif
out_flags |= MSG_EOR;
out_flags |= MSG_TRUNC;
control->length = 0;
SCTP_INP_READ_UNLOCK(inp);
goto done_with_control;
}
SCTP_INP_READ_UNLOCK(inp);
/* We will fall around to get more data */
}
goto get_more_data;
} else {
/*-
* Give caller back the mbuf chain,
* store in uio_resid the length
*/
wakeup_read_socket = 0;
if ((control->end_added == 0) ||
(TAILQ_NEXT(control, next) == NULL)) {
/* Need to get rlock */
if (hold_rlock == 0) {
SCTP_INP_READ_LOCK(inp);
hold_rlock = 1;
}
}
if (control->end_added) {
out_flags |= MSG_EOR;
if ((control->do_not_ref_stcb == 0) &&
(control->stcb != NULL) &&
((control->spec_flags & M_NOTIFICATION) == 0))
control->stcb->asoc.strmin[control->sinfo_stream].delivery_started = 0;
}
if (control->spec_flags & M_NOTIFICATION) {
out_flags |= MSG_NOTIFICATION;
}
uio->uio_resid = control->length;
*mp = control->data;
m = control->data;
while (m) {
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBFREE, SCTP_BUF_LEN(m));
}
sctp_sbfree(control, stcb, &so->so_rcv, m);
freed_so_far += SCTP_BUF_LEN(m);
freed_so_far += MSIZE;
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_SB_LOGGING_ENABLE) {
sctp_sblog(&so->so_rcv,
control->do_not_ref_stcb ? NULL : stcb, SCTP_LOG_SBRESULT, 0);
}
m = SCTP_BUF_NEXT(m);
}
control->data = control->tail_mbuf = NULL;
control->length = 0;
if (out_flags & MSG_EOR) {
/* Done with this control */
goto done_with_control;
}
}
release:
if (hold_rlock == 1) {
SCTP_INP_READ_UNLOCK(inp);
hold_rlock = 0;
}
if (hold_sblock == 1) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
sbunlock(&so->so_rcv);
sockbuf_lock = 0;
release_unlocked:
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
hold_sblock = 0;
}
if ((stcb) && (in_flags & MSG_PEEK) == 0) {
if ((freed_so_far >= rwnd_req) &&
(control && (control->do_not_ref_stcb == 0)) &&
(no_rcv_needed == 0))
sctp_user_rcvd(stcb, &freed_so_far, hold_rlock, rwnd_req);
}
out:
if (msg_flags) {
*msg_flags = out_flags;
}
if (((out_flags & MSG_EOR) == 0) &&
((in_flags & MSG_PEEK) == 0) &&
(sinfo) &&
(sctp_is_feature_on(inp, SCTP_PCB_FLAGS_EXT_RCVINFO) ||
sctp_is_feature_on(inp, SCTP_PCB_FLAGS_RECVNXTINFO))) {
struct sctp_extrcvinfo *s_extra;
s_extra = (struct sctp_extrcvinfo *)sinfo;
s_extra->sreinfo_next_flags = SCTP_NO_NEXT_MSG;
}
if (hold_rlock == 1) {
SCTP_INP_READ_UNLOCK(inp);
}
if (hold_sblock) {
SOCKBUF_UNLOCK(&so->so_rcv);
}
if (sockbuf_lock) {
sbunlock(&so->so_rcv);
}
if (freecnt_applied) {
/*
* The lock on the socket buffer protects us so the free
* code will stop. But since we used the socketbuf lock and
* the sender uses the tcb_lock to increment, we need to use
* the atomic add to the refcnt.
*/
if (stcb == NULL) {
#ifdef INVARIANTS
panic("stcb for refcnt has gone NULL?");
goto stage_left;
#else
goto stage_left;
#endif
}
atomic_add_int(&stcb->asoc.refcnt, -1);
/* Save the value back for next time */
stcb->freed_by_sorcv_sincelast = freed_so_far;
}
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_RECV_RWND_LOGGING_ENABLE) {
if (stcb) {
sctp_misc_ints(SCTP_SORECV_DONE,
freed_so_far,
((uio) ? (slen - uio->uio_resid) : slen),
stcb->asoc.my_rwnd,
so->so_rcv.sb_cc);
} else {
sctp_misc_ints(SCTP_SORECV_DONE,
freed_so_far,
((uio) ? (slen - uio->uio_resid) : slen),
0,
so->so_rcv.sb_cc);
}
}
stage_left:
if (wakeup_read_socket) {
sctp_sorwakeup(inp, so);
}
return (error);
}
#ifdef SCTP_MBUF_LOGGING
struct mbuf *
sctp_m_free(struct mbuf *m)
{
if (SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_MBUF_LOGGING_ENABLE) {
if (SCTP_BUF_IS_EXTENDED(m)) {
sctp_log_mb(m, SCTP_MBUF_IFREE);
}
}
return (m_free(m));
}
void
sctp_m_freem(struct mbuf *mb)
{
while (mb != NULL)
mb = sctp_m_free(mb);
}
#endif
int
sctp_dynamic_set_primary(struct sockaddr *sa, uint32_t vrf_id)
{
/*
* Given a local address. For all associations that holds the
* address, request a peer-set-primary.
*/
struct sctp_ifa *ifa;
struct sctp_laddr *wi;
ifa = sctp_find_ifa_by_addr(sa, vrf_id, 0);
if (ifa == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, EADDRNOTAVAIL);
return (EADDRNOTAVAIL);
}
/*
* Now that we have the ifa we must awaken the iterator with this
* message.
*/
wi = SCTP_ZONE_GET(SCTP_BASE_INFO(ipi_zone_laddr), struct sctp_laddr);
if (wi == NULL) {
SCTP_LTRACE_ERR_RET(NULL, NULL, NULL, SCTP_FROM_SCTPUTIL, ENOMEM);
return (ENOMEM);
}
/* Now incr the count and int wi structure */
SCTP_INCR_LADDR_COUNT();
bzero(wi, sizeof(*wi));
(void)SCTP_GETTIME_TIMEVAL(&wi->start_time);
wi->ifa = ifa;
wi->action = SCTP_SET_PRIM_ADDR;
atomic_add_int(&ifa->refcount, 1);
/* Now add it to the work queue */
SCTP_WQ_ADDR_LOCK();
/*
* Should this really be a tailq? As it is we will process the
* newest first :-0
*/
LIST_INSERT_HEAD(&SCTP_BASE_INFO(addr_wq), wi, sctp_nxt_addr);
SCTP_WQ_ADDR_UNLOCK();
sctp_timer_start(SCTP_TIMER_TYPE_ADDR_WQ,
(struct sctp_inpcb *)NULL,
(struct sctp_tcb *)NULL,
(struct sctp_nets *)NULL);
return (0);
}
int
sctp_soreceive(struct socket *so,
struct sockaddr **psa,
struct uio *uio,
struct mbuf **mp0,
struct mbuf **controlp,
int *flagsp)
{
int error, fromlen;
uint8_t sockbuf[256];
struct sockaddr *from;
struct sctp_extrcvinfo sinfo;
int filling_sinfo = 1;
struct sctp_inpcb *inp;
inp = (struct sctp_inpcb *)so->so_pcb;
/* pickup the assoc we are reading from */
if (inp == NULL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
return (EINVAL);
}
if ((sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVDATAIOEVNT) &&
sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVRCVINFO) &&
sctp_is_feature_off(inp, SCTP_PCB_FLAGS_RECVNXTINFO)) ||
(controlp == NULL)) {
/* user does not want the sndrcv ctl */
filling_sinfo = 0;
}
if (psa) {
from = (struct sockaddr *)sockbuf;
fromlen = sizeof(sockbuf);
from->sa_len = 0;
} else {
from = NULL;
fromlen = 0;
}
error = sctp_sorecvmsg(so, uio, mp0, from, fromlen, flagsp,
(struct sctp_sndrcvinfo *)&sinfo, filling_sinfo);
if ((controlp) && (filling_sinfo)) {
/* copy back the sinfo in a CMSG format */
if (filling_sinfo)
*controlp = sctp_build_ctl_nchunk(inp,
(struct sctp_sndrcvinfo *)&sinfo);
else
*controlp = NULL;
}
if (psa) {
/* copy back the address info */
if (from && from->sa_len) {
*psa = sodupsockaddr(from, M_NOWAIT);
} else {
*psa = NULL;
}
}
return (error);
}
int
sctp_connectx_helper_add(struct sctp_tcb *stcb, struct sockaddr *addr,
int totaddr, int *error)
{
int added = 0;
int i;
struct sctp_inpcb *inp;
struct sockaddr *sa;
size_t incr = 0;
#ifdef INET
struct sockaddr_in *sin;
#endif
#ifdef INET6
struct sockaddr_in6 *sin6;
#endif
sa = addr;
inp = stcb->sctp_ep;
*error = 0;
for (i = 0; i < totaddr; i++) {
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
incr = sizeof(struct sockaddr_in);
sin = (struct sockaddr_in *)sa;
if ((sin->sin_addr.s_addr == INADDR_ANY) ||
(sin->sin_addr.s_addr == INADDR_BROADCAST) ||
IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_7);
*error = EINVAL;
goto out_now;
}
if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
/* assoc gone no un-lock */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_7);
*error = ENOBUFS;
goto out_now;
}
added++;
break;
#endif
#ifdef INET6
case AF_INET6:
incr = sizeof(struct sockaddr_in6);
sin6 = (struct sockaddr_in6 *)sa;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr) ||
IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_8);
*error = EINVAL;
goto out_now;
}
if (sctp_add_remote_addr(stcb, sa, NULL, SCTP_DONOT_SETSCOPE, SCTP_ADDR_IS_CONFIRMED)) {
/* assoc gone no un-lock */
SCTP_LTRACE_ERR_RET(NULL, stcb, NULL, SCTP_FROM_SCTPUTIL, ENOBUFS);
(void)sctp_free_assoc(inp, stcb, SCTP_NORMAL_PROC, SCTP_FROM_SCTP_USRREQ + SCTP_LOC_8);
*error = ENOBUFS;
goto out_now;
}
added++;
break;
#endif
default:
break;
}
sa = (struct sockaddr *)((caddr_t)sa + incr);
}
out_now:
return (added);
}
struct sctp_tcb *
sctp_connectx_helper_find(struct sctp_inpcb *inp, struct sockaddr *addr,
int *totaddr, int *num_v4, int *num_v6, int *error,
int limit, int *bad_addr)
{
struct sockaddr *sa;
struct sctp_tcb *stcb = NULL;
size_t incr, at, i;
at = incr = 0;
sa = addr;
*error = *num_v6 = *num_v4 = 0;
/* account and validate addresses */
for (i = 0; i < (size_t)*totaddr; i++) {
switch (sa->sa_family) {
#ifdef INET
case AF_INET:
(*num_v4) += 1;
incr = sizeof(struct sockaddr_in);
if (sa->sa_len != incr) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
*bad_addr = 1;
return (NULL);
}
break;
#endif
#ifdef INET6
case AF_INET6:
{
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)sa;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
/* Must be non-mapped for connectx */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
*bad_addr = 1;
return (NULL);
}
(*num_v6) += 1;
incr = sizeof(struct sockaddr_in6);
if (sa->sa_len != incr) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
*bad_addr = 1;
return (NULL);
}
break;
}
#endif
default:
*totaddr = i;
/* we are done */
break;
}
if (i == (size_t)*totaddr) {
break;
}
SCTP_INP_INCR_REF(inp);
stcb = sctp_findassociation_ep_addr(&inp, sa, NULL, NULL, NULL);
if (stcb != NULL) {
/* Already have or am bring up an association */
return (stcb);
} else {
SCTP_INP_DECR_REF(inp);
}
if ((at + incr) > (size_t)limit) {
*totaddr = i;
break;
}
sa = (struct sockaddr *)((caddr_t)sa + incr);
}
return ((struct sctp_tcb *)NULL);
}
/*
* sctp_bindx(ADD) for one address.
* assumes all arguments are valid/checked by caller.
*/
void
sctp_bindx_add_address(struct socket *so, struct sctp_inpcb *inp,
struct sockaddr *sa, sctp_assoc_t assoc_id,
uint32_t vrf_id, int *error, void *p)
{
struct sockaddr *addr_touse;
#ifdef INET6
struct sockaddr_in sin;
#endif
/* see if we're bound all already! */
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
addr_touse = sa;
#ifdef INET6
if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6;
if (sa->sa_len != sizeof(struct sockaddr_in6)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
/* can only bind v6 on PF_INET6 sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
sin6 = (struct sockaddr_in6 *)addr_touse;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind v4-mapped on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
in6_sin6_2_sin(&sin, sin6);
addr_touse = (struct sockaddr *)&sin;
}
}
#endif
#ifdef INET
if (sa->sa_family == AF_INET) {
if (sa->sa_len != sizeof(struct sockaddr_in)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind v4 on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
}
#endif
if (inp->sctp_flags & SCTP_PCB_FLAGS_UNBOUND) {
if (p == NULL) {
/* Can't get proc for Net/Open BSD */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
*error = sctp_inpcb_bind(so, addr_touse, NULL, p);
return;
}
/*
* No locks required here since bind and mgmt_ep_sa all do their own
* locking. If we do something for the FIX: below we may need to
* lock in that case.
*/
if (assoc_id == 0) {
/* add the address */
struct sctp_inpcb *lep;
struct sockaddr_in *lsin = (struct sockaddr_in *)addr_touse;
/* validate the incoming port */
if ((lsin->sin_port != 0) &&
(lsin->sin_port != inp->sctp_lport)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
} else {
/* user specified 0 port, set it to existing port */
lsin->sin_port = inp->sctp_lport;
}
lep = sctp_pcb_findep(addr_touse, 1, 0, vrf_id);
if (lep != NULL) {
/*
* We must decrement the refcount since we have the
* ep already and are binding. No remove going on
* here.
*/
SCTP_INP_DECR_REF(lep);
}
if (lep == inp) {
/* already bound to it.. ok */
return;
} else if (lep == NULL) {
((struct sockaddr_in *)addr_touse)->sin_port = 0;
*error = sctp_addr_mgmt_ep_sa(inp, addr_touse,
SCTP_ADD_IP_ADDRESS,
vrf_id, NULL);
} else {
*error = EADDRINUSE;
}
if (*error)
return;
} else {
/*
* FIX: decide whether we allow assoc based bindx
*/
}
}
/*
* sctp_bindx(DELETE) for one address.
* assumes all arguments are valid/checked by caller.
*/
void
sctp_bindx_delete_address(struct sctp_inpcb *inp,
struct sockaddr *sa, sctp_assoc_t assoc_id,
uint32_t vrf_id, int *error)
{
struct sockaddr *addr_touse;
#ifdef INET6
struct sockaddr_in sin;
#endif
/* see if we're bound all already! */
if (inp->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
addr_touse = sa;
#ifdef INET6
if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6;
if (sa->sa_len != sizeof(struct sockaddr_in6)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) == 0) {
/* can only bind v6 on PF_INET6 sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
sin6 = (struct sockaddr_in6 *)addr_touse;
if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind mapped-v4 on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
in6_sin6_2_sin(&sin, sin6);
addr_touse = (struct sockaddr *)&sin;
}
}
#endif
#ifdef INET
if (sa->sa_family == AF_INET) {
if (sa->sa_len != sizeof(struct sockaddr_in)) {
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
if ((inp->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) &&
SCTP_IPV6_V6ONLY(inp)) {
/* can't bind v4 on PF_INET sockets */
SCTP_LTRACE_ERR_RET(inp, NULL, NULL, SCTP_FROM_SCTPUTIL, EINVAL);
*error = EINVAL;
return;
}
}
#endif
/*
* No lock required mgmt_ep_sa does its own locking. If the FIX:
* below is ever changed we may need to lock before calling
* association level binding.
*/
if (assoc_id == 0) {
/* delete the address */
*error = sctp_addr_mgmt_ep_sa(inp, addr_touse,
SCTP_DEL_IP_ADDRESS,
vrf_id, NULL);
} else {
/*
* FIX: decide whether we allow assoc based bindx
*/
}
}
/*
* returns the valid local address count for an assoc, taking into account
* all scoping rules
*/
int
sctp_local_addr_count(struct sctp_tcb *stcb)
{
int loopback_scope, ipv4_local_scope, local_scope, site_scope;
int ipv4_addr_legal, ipv6_addr_legal;
struct sctp_vrf *vrf;
struct sctp_ifn *sctp_ifn;
struct sctp_ifa *sctp_ifa;
int count = 0;
/* Turn on all the appropriate scopes */
loopback_scope = stcb->asoc.loopback_scope;
ipv4_local_scope = stcb->asoc.ipv4_local_scope;
local_scope = stcb->asoc.local_scope;
site_scope = stcb->asoc.site_scope;
ipv4_addr_legal = ipv6_addr_legal = 0;
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUND_V6) {
ipv6_addr_legal = 1;
if (SCTP_IPV6_V6ONLY(stcb->sctp_ep) == 0) {
ipv4_addr_legal = 1;
}
} else {
ipv4_addr_legal = 1;
}
SCTP_IPI_ADDR_RLOCK();
vrf = sctp_find_vrf(stcb->asoc.vrf_id);
if (vrf == NULL) {
/* no vrf, no addresses */
SCTP_IPI_ADDR_RUNLOCK();
return (0);
}
if (stcb->sctp_ep->sctp_flags & SCTP_PCB_FLAGS_BOUNDALL) {
/*
* bound all case: go through all ifns on the vrf
*/
LIST_FOREACH(sctp_ifn, &vrf->ifnlist, next_ifn) {
if ((loopback_scope == 0) &&
SCTP_IFN_IS_IFT_LOOP(sctp_ifn)) {
continue;
}
LIST_FOREACH(sctp_ifa, &sctp_ifn->ifalist, next_ifa) {
if (sctp_is_addr_restricted(stcb, sctp_ifa))
continue;
switch (sctp_ifa->address.sa.sa_family) {
#ifdef INET
case AF_INET:
if (ipv4_addr_legal) {
struct sockaddr_in *sin;
sin = (struct sockaddr_in *)&sctp_ifa->address.sa;
if (sin->sin_addr.s_addr == 0) {
/*
* skip unspecified
* addrs
*/
continue;
}
if ((ipv4_local_scope == 0) &&
(IN4_ISPRIVATE_ADDRESS(&sin->sin_addr))) {
continue;
}
/* count this one */
count++;
} else {
continue;
}
break;
#endif
#ifdef INET6
case AF_INET6:
if (ipv6_addr_legal) {
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6 *)&sctp_ifa->address.sa;
if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
continue;
}
if (IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
if (local_scope == 0)
continue;
if (sin6->sin6_scope_id == 0) {
if (sa6_recoverscope(sin6) != 0)
/*
*
* bad
*
* li
* nk
*
* loc
* al
*
* add
* re
* ss
* */
continue;
}
}
if ((site_scope == 0) &&
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr))) {
continue;
}
/* count this one */
count++;
}
break;
#endif
default:
/* TSNH */
break;
}
}
}
} else {
/*
* subset bound case
*/
struct sctp_laddr *laddr;
LIST_FOREACH(laddr, &stcb->sctp_ep->sctp_addr_list,
sctp_nxt_addr) {
if (sctp_is_addr_restricted(stcb, laddr->ifa)) {
continue;
}
/* count this one */
count++;
}
}
SCTP_IPI_ADDR_RUNLOCK();
return (count);
}
#if defined(SCTP_LOCAL_TRACE_BUF)
void
sctp_log_trace(uint32_t subsys, const char *str SCTP_UNUSED, uint32_t a, uint32_t b, uint32_t c, uint32_t d, uint32_t e, uint32_t f)
{
uint32_t saveindex, newindex;
do {
saveindex = SCTP_BASE_SYSCTL(sctp_log).index;
if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
newindex = 1;
} else {
newindex = saveindex + 1;
}
} while (atomic_cmpset_int(&SCTP_BASE_SYSCTL(sctp_log).index, saveindex, newindex) == 0);
if (saveindex >= SCTP_MAX_LOGGING_SIZE) {
saveindex = 0;
}
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].timestamp = SCTP_GET_CYCLECOUNT;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].subsys = subsys;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[0] = a;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[1] = b;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[2] = c;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[3] = d;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[4] = e;
SCTP_BASE_SYSCTL(sctp_log).entry[saveindex].params[5] = f;
}
#endif
/* XXX: Remove the #ifdef after tunneling over IPv6 works also on FreeBSD. */
#ifdef INET
/* We will need to add support
* to bind the ports and such here
* so we can do UDP tunneling. In
* the mean-time, we return error
*/
#include <netinet/udp.h>
#include <netinet/udp_var.h>
#include <sys/proc.h>
#ifdef INET6
#include <netinet6/sctp6_var.h>
#endif
static void
sctp_recv_udp_tunneled_packet(struct mbuf *m, int off, struct inpcb *ignored)
{
struct ip *iph;
struct mbuf *sp, *last;
struct udphdr *uhdr;
uint16_t port;
if ((m->m_flags & M_PKTHDR) == 0) {
/* Can't handle one that is not a pkt hdr */
goto out;
}
/* Pull the src port */
iph = mtod(m, struct ip *);
uhdr = (struct udphdr *)((caddr_t)iph + off);
port = uhdr->uh_sport;
/*
* Split out the mbuf chain. Leave the IP header in m, place the
* rest in the sp.
*/
sp = m_split(m, off, M_DONTWAIT);
if (sp == NULL) {
/* Gak, drop packet, we can't do a split */
goto out;
}
if (sp->m_pkthdr.len < sizeof(struct udphdr) + sizeof(struct sctphdr)) {
/* Gak, packet can't have an SCTP header in it - too small */
m_freem(sp);
goto out;
}
/* Now pull up the UDP header and SCTP header together */
sp = m_pullup(sp, sizeof(struct udphdr) + sizeof(struct sctphdr));
if (sp == NULL) {
/* Gak pullup failed */
goto out;
}
/* Trim out the UDP header */
m_adj(sp, sizeof(struct udphdr));
/* Now reconstruct the mbuf chain */
for (last = m; last->m_next; last = last->m_next);
last->m_next = sp;
m->m_pkthdr.len += sp->m_pkthdr.len;
iph = mtod(m, struct ip *);
switch (iph->ip_v) {
#ifdef INET
case IPVERSION:
iph->ip_len = ntohs(htons(iph->ip_len) - sizeof(struct udphdr));
sctp_input_with_port(m, off, port);
break;
#endif
#ifdef INET6
case IPV6_VERSION >> 4:
/* Not yet supported. */
goto out;
break;
#endif
default:
goto out;
break;
}
return;
out:
m_freem(m);
}
void
sctp_over_udp_stop(void)
{
struct socket *sop;
/*
* This function assumes sysctl caller holds sctp_sysctl_info_lock()
* for writting!
*/
if (SCTP_BASE_INFO(udp_tun_socket) == NULL) {
/* Nothing to do */
return;
}
sop = SCTP_BASE_INFO(udp_tun_socket);
soclose(sop);
SCTP_BASE_INFO(udp_tun_socket) = NULL;
}
int
sctp_over_udp_start(void)
{
uint16_t port;
int ret;
struct sockaddr_in sin;
struct socket *sop = NULL;
struct thread *th;
struct ucred *cred;
/*
* This function assumes sysctl caller holds sctp_sysctl_info_lock()
* for writting!
*/
port = SCTP_BASE_SYSCTL(sctp_udp_tunneling_port);
if (port == 0) {
/* Must have a port set */
return (EINVAL);
}
if (SCTP_BASE_INFO(udp_tun_socket) != NULL) {
/* Already running -- must stop first */
return (EALREADY);
}
th = curthread;
cred = th->td_ucred;
if ((ret = socreate(PF_INET, &sop,
SOCK_DGRAM, IPPROTO_UDP, cred, th))) {
return (ret);
}
SCTP_BASE_INFO(udp_tun_socket) = sop;
/* call the special UDP hook */
ret = udp_set_kernel_tunneling(sop, sctp_recv_udp_tunneled_packet);
if (ret) {
goto exit_stage_left;
}
/* Ok we have a socket, bind it to the port */
memset(&sin, 0, sizeof(sin));
sin.sin_len = sizeof(sin);
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
ret = sobind(sop, (struct sockaddr *)&sin, th);
if (ret) {
/* Close up we cant get the port */
exit_stage_left:
sctp_over_udp_stop();
return (ret);
}
/*
* Ok we should now get UDP packets directly to our input routine
* sctp_recv_upd_tunneled_packet().
*/
return (0);
}
#endif
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