527 lines
14 KiB
C
527 lines
14 KiB
C
/*-
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* Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* a) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* b) Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution.
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*
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* c) Neither the name of Cisco Systems, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* $KAME: sctp_output.c,v 1.46 2005/03/06 16:04:17 itojun Exp $ */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <netinet/sctp_os.h>
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#include <netinet/sctp_var.h>
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#include <netinet/sctp_pcb.h>
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#include <netinet/sctp_header.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_output.h>
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#include <netinet/sctp_bsd_addr.h>
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#include <netinet/sctp_uio.h>
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#include <netinet/sctputil.h>
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#include <netinet/sctp_timer.h>
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#include <netinet/sctp_asconf.h>
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#include <netinet/sctp_sysctl.h>
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#include <netinet/sctp_indata.h>
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#include <sys/unistd.h>
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/* Declare all of our malloc named types */
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/* Note to Michael/Peter for mac-os,
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* I think mac has this too since I
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* do see the M_PCB type, so I
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* will also put in the mac file the
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* MALLOC_DECLARE. If this does not
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* work for mac uncomment the defines for
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* the strings that we use in Panda, I put
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* them in comments in the mac-os file.
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*/
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MALLOC_DEFINE(SCTP_M_MAP, "sctp_map", "sctp asoc map descriptor");
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MALLOC_DEFINE(SCTP_M_STRMI, "sctp_stri", "sctp stream in array");
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MALLOC_DEFINE(SCTP_M_STRMO, "sctp_stro", "sctp stream out array");
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MALLOC_DEFINE(SCTP_M_ASC_ADDR, "sctp_aadr", "sctp asconf address");
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MALLOC_DEFINE(SCTP_M_ASC_IT, "sctp_a_it", "sctp asconf iterator");
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MALLOC_DEFINE(SCTP_M_AUTH_CL, "sctp_atcl", "sctp auth chunklist");
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MALLOC_DEFINE(SCTP_M_AUTH_KY, "sctp_atky", "sctp auth key");
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MALLOC_DEFINE(SCTP_M_AUTH_HL, "sctp_athm", "sctp auth hmac list");
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MALLOC_DEFINE(SCTP_M_AUTH_IF, "sctp_athi", "sctp auth info");
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MALLOC_DEFINE(SCTP_M_STRESET, "sctp_stre", "sctp stream reset");
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MALLOC_DEFINE(SCTP_M_CMSG, "sctp_cmsg", "sctp CMSG buffer");
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MALLOC_DEFINE(SCTP_M_COPYAL, "sctp_cpal", "sctp copy all");
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MALLOC_DEFINE(SCTP_M_VRF, "sctp_vrf", "sctp vrf struct");
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MALLOC_DEFINE(SCTP_M_IFA, "sctp_ifa", "sctp ifa struct");
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MALLOC_DEFINE(SCTP_M_IFN, "sctp_ifn", "sctp ifn struct");
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MALLOC_DEFINE(SCTP_M_TIMW, "sctp_timw", "sctp time block");
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MALLOC_DEFINE(SCTP_M_MVRF, "sctp_mvrf", "sctp mvrf pcb list");
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MALLOC_DEFINE(SCTP_M_ITER, "sctp_iter", "sctp iterator control");
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MALLOC_DEFINE(SCTP_M_SOCKOPT, "sctp_socko", "sctp socket option");
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#if defined(SCTP_USE_THREAD_BASED_ITERATOR)
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void
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sctp_wakeup_iterator(void)
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{
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wakeup(&sctppcbinfo.iterator_running);
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}
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static void
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sctp_iterator_thread(void *v)
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{
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SCTP_IPI_ITERATOR_WQ_LOCK();
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sctppcbinfo.iterator_running = 0;
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while (1) {
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msleep(&sctppcbinfo.iterator_running,
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&sctppcbinfo.ipi_iterator_wq_mtx,
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0, "waiting_for_work", 0);
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sctp_iterator_worker();
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}
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}
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void
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sctp_startup_iterator(void)
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{
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int ret;
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ret = kthread_create(sctp_iterator_thread,
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(void *)NULL,
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&sctppcbinfo.thread_proc,
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RFPROC,
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SCTP_KTHREAD_PAGES,
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SCTP_KTRHEAD_NAME);
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}
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#endif
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void
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sctp_gather_internal_ifa_flags(struct sctp_ifa *ifa)
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{
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struct in6_ifaddr *ifa6;
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ifa6 = (struct in6_ifaddr *)ifa->ifa;
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ifa->flags = ifa6->ia6_flags;
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if (!ip6_use_deprecated) {
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if (ifa->flags &
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IN6_IFF_DEPRECATED) {
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ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
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} else {
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ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
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}
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} else {
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ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
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}
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if (ifa->flags &
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(IN6_IFF_DETACHED |
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IN6_IFF_ANYCAST |
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IN6_IFF_NOTREADY)) {
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ifa->localifa_flags |= SCTP_ADDR_IFA_UNUSEABLE;
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} else {
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ifa->localifa_flags &= ~SCTP_ADDR_IFA_UNUSEABLE;
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}
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}
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static uint32_t
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sctp_is_desired_interface_type(struct ifaddr *ifa)
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{
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int result;
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/* check the interface type to see if it's one we care about */
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switch (ifa->ifa_ifp->if_type) {
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case IFT_ETHER:
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case IFT_ISO88023:
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case IFT_ISO88024:
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case IFT_ISO88025:
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case IFT_ISO88026:
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case IFT_STARLAN:
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case IFT_P10:
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case IFT_P80:
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case IFT_HY:
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case IFT_FDDI:
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case IFT_XETHER:
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case IFT_ISDNBASIC:
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case IFT_ISDNPRIMARY:
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case IFT_PTPSERIAL:
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case IFT_PPP:
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case IFT_LOOP:
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case IFT_SLIP:
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case IFT_IP:
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case IFT_IPOVERCDLC:
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case IFT_IPOVERCLAW:
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case IFT_VIRTUALIPADDRESS:
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result = 1;
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break;
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default:
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result = 0;
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}
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return (result);
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}
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static void
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sctp_init_ifns_for_vrf(int vrfid)
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{
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/*
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* Here we must apply ANY locks needed by the IFN we access and also
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* make sure we lock any IFA that exists as we float through the
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* list of IFA's
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*/
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struct ifnet *ifn;
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struct ifaddr *ifa;
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struct in6_ifaddr *ifa6;
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struct sctp_ifa *sctp_ifa;
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uint32_t ifa_flags;
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TAILQ_FOREACH(ifn, &ifnet, if_list) {
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TAILQ_FOREACH(ifa, &ifn->if_addrlist, ifa_list) {
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if (ifa->ifa_addr == NULL) {
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continue;
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}
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if ((ifa->ifa_addr->sa_family != AF_INET) &&
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(ifa->ifa_addr->sa_family != AF_INET6)
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) {
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/* non inet/inet6 skip */
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continue;
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}
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if (ifa->ifa_addr->sa_family == AF_INET6) {
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ifa6 = (struct in6_ifaddr *)ifa;
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ifa_flags = ifa6->ia6_flags;
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if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
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/* skip unspecifed addresses */
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continue;
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}
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} else if (ifa->ifa_addr->sa_family == AF_INET) {
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if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
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continue;
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}
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}
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if (sctp_is_desired_interface_type(ifa) == 0) {
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/* non desired type */
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continue;
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}
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if ((ifa->ifa_addr->sa_family == AF_INET6) ||
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(ifa->ifa_addr->sa_family == AF_INET)) {
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if (ifa->ifa_addr->sa_family == AF_INET6) {
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ifa6 = (struct in6_ifaddr *)ifa;
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ifa_flags = ifa6->ia6_flags;
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} else {
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ifa_flags = 0;
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}
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sctp_ifa = sctp_add_addr_to_vrf(vrfid,
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(void *)ifn,
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ifn->if_index,
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ifn->if_type,
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ifn->if_xname,
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(void *)ifa,
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ifa->ifa_addr,
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ifa_flags, 0
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);
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if (sctp_ifa) {
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sctp_ifa->localifa_flags &= ~SCTP_ADDR_DEFER_USE;
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}
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}
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}
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}
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}
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void
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sctp_init_vrf_list(int vrfid)
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{
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if (vrfid > SCTP_MAX_VRF_ID)
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/* can't do that */
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return;
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/* Don't care about return here */
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(void)sctp_allocate_vrf(vrfid);
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/*
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* Now we need to build all the ifn's for this vrf and there
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* addresses
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*/
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sctp_init_ifns_for_vrf(vrfid);
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}
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static uint8_t first_time = 0;
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void
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sctp_addr_change(struct ifaddr *ifa, int cmd)
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{
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struct sctp_ifa *ifap = NULL;
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uint32_t ifa_flags = 0;
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struct in6_ifaddr *ifa6;
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/*
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* BSD only has one VRF, if this changes we will need to hook in the
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* right things here to get the id to pass to the address managment
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* routine.
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*/
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if (first_time == 0) {
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/* Special test to see if my ::1 will showup with this */
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first_time = 1;
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sctp_init_ifns_for_vrf(SCTP_DEFAULT_VRFID);
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}
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if ((cmd != RTM_ADD) && (cmd != RTM_DELETE)) {
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/* don't know what to do with this */
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return;
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}
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if (ifa->ifa_addr == NULL) {
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return;
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}
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if ((ifa->ifa_addr->sa_family != AF_INET) &&
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(ifa->ifa_addr->sa_family != AF_INET6)
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) {
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/* non inet/inet6 skip */
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return;
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}
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if (ifa->ifa_addr->sa_family == AF_INET6) {
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ifa6 = (struct in6_ifaddr *)ifa;
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ifa_flags = ifa6->ia6_flags;
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if (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)ifa->ifa_addr)->sin6_addr)) {
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/* skip unspecifed addresses */
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return;
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}
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} else if (ifa->ifa_addr->sa_family == AF_INET) {
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if (((struct sockaddr_in *)ifa->ifa_addr)->sin_addr.s_addr == 0) {
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return;
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}
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}
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if (sctp_is_desired_interface_type(ifa) == 0) {
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/* non desired type */
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return;
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}
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if (cmd == RTM_ADD) {
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ifap = sctp_add_addr_to_vrf(SCTP_DEFAULT_VRFID, (void *)ifa->ifa_ifp,
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ifa->ifa_ifp->if_index, ifa->ifa_ifp->if_type,
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ifa->ifa_ifp->if_xname,
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(void *)ifa, ifa->ifa_addr, ifa_flags, 1);
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} else if (cmd == RTM_DELETE) {
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sctp_del_addr_from_vrf(SCTP_DEFAULT_VRFID, ifa->ifa_addr, ifa->ifa_ifp->if_index);
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/*
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* We don't bump refcount here so when it completes the
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* final delete will happen.
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*/
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}
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}
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struct mbuf *
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sctp_get_mbuf_for_msg(unsigned int space_needed, int want_header,
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int how, int allonebuf, int type)
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{
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struct mbuf *m = NULL;
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m = m_getm2(NULL, space_needed, how, type, want_header ? M_PKTHDR : 0);
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if (m == NULL) {
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/* bad, no memory */
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return (m);
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}
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if (allonebuf) {
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int siz;
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if (SCTP_BUF_IS_EXTENDED(m)) {
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siz = SCTP_BUF_EXTEND_SIZE(m);
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} else {
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if (want_header)
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siz = MHLEN;
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else
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siz = MLEN;
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}
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if (siz < space_needed) {
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m_freem(m);
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return (NULL);
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}
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}
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if (SCTP_BUF_NEXT(m)) {
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sctp_m_freem(SCTP_BUF_NEXT(m));
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SCTP_BUF_NEXT(m) = NULL;
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}
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#ifdef SCTP_MBUF_LOGGING
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if (sctp_logging_level & SCTP_MBUF_LOGGING_ENABLE) {
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if (SCTP_BUF_IS_EXTENDED(m)) {
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sctp_log_mb(m, SCTP_MBUF_IALLOC);
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}
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}
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#endif
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return (m);
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}
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#ifdef SCTP_PACKET_LOGGING
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int packet_log_writers = 0;
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int packet_log_end = 0;
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uint8_t packet_log_buffer[SCTP_PACKET_LOG_SIZE];
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void
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sctp_packet_log(struct mbuf *m, int length)
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{
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int *lenat, thisone;
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void *copyto;
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uint32_t *tick_tock;
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int total_len;
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int grabbed_lock = 0;
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int value, newval, thisend, thisbegin;
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/*
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* Buffer layout. -sizeof this entry (total_len) -previous end
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* (value) -ticks of log (ticks) o -ip packet o -as logged -
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* where this started (thisbegin) x <--end points here
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*/
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total_len = SCTP_SIZE32((length + (4 * sizeof(int))));
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/* Log a packet to the buffer. */
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if (total_len > SCTP_PACKET_LOG_SIZE) {
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/* Can't log this packet I have not a buffer big enough */
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return;
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}
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if (length < (SCTP_MIN_V4_OVERHEAD + sizeof(struct sctp_cookie_ack_chunk))) {
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return;
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}
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atomic_add_int(&packet_log_writers, 1);
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try_again:
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if (packet_log_writers > SCTP_PKTLOG_WRITERS_NEED_LOCK) {
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SCTP_IP_PKTLOG_LOCK();
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grabbed_lock = 1;
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again_locked:
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value = packet_log_end;
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newval = packet_log_end + total_len;
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if (newval >= SCTP_PACKET_LOG_SIZE) {
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/* we wrapped */
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thisbegin = 0;
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thisend = total_len;
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} else {
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thisbegin = packet_log_end;
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thisend = newval;
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}
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if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
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goto again_locked;
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}
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} else {
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value = packet_log_end;
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newval = packet_log_end + total_len;
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if (newval >= SCTP_PACKET_LOG_SIZE) {
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/* we wrapped */
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thisbegin = 0;
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thisend = total_len;
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} else {
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thisbegin = packet_log_end;
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thisend = newval;
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}
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if (!(atomic_cmpset_int(&packet_log_end, value, thisend))) {
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goto try_again;
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}
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}
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/* Sanity check */
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if (thisend >= SCTP_PACKET_LOG_SIZE) {
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printf("Insanity stops a log thisbegin:%d thisend:%d writers:%d lock:%d end:%d\n",
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thisbegin,
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thisend,
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packet_log_writers,
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grabbed_lock,
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packet_log_end);
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packet_log_end = 0;
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goto no_log;
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}
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lenat = (int *)&packet_log_buffer[thisbegin];
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*lenat = total_len;
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lenat++;
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*lenat = value;
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lenat++;
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tick_tock = (uint32_t *) lenat;
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lenat++;
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*tick_tock = sctp_get_tick_count();
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copyto = (void *)lenat;
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thisone = thisend - sizeof(int);
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lenat = (int *)&packet_log_buffer[thisone];
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*lenat = thisbegin;
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if (grabbed_lock) {
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SCTP_IP_PKTLOG_UNLOCK();
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grabbed_lock = 0;
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}
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m_copydata(m, 0, length, (caddr_t)copyto);
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no_log:
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if (grabbed_lock) {
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SCTP_IP_PKTLOG_UNLOCK();
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}
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atomic_subtract_int(&packet_log_writers, 1);
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}
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int
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sctp_copy_out_packet_log(uint8_t * target, int length)
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{
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/*
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|
* We wind through the packet log starting at start copying up to
|
|
* length bytes out. We return the number of bytes copied.
|
|
*/
|
|
int tocopy, this_copy;
|
|
int *lenat;
|
|
int did_delay = 0;
|
|
|
|
tocopy = length;
|
|
if (length < (2 * sizeof(int))) {
|
|
/* not enough room */
|
|
return (0);
|
|
}
|
|
if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
|
|
atomic_add_int(&packet_log_writers, SCTP_PKTLOG_WRITERS_NEED_LOCK);
|
|
again:
|
|
if ((did_delay == 0) && (packet_log_writers != SCTP_PKTLOG_WRITERS_NEED_LOCK)) {
|
|
/*
|
|
* we delay here for just a moment hoping the
|
|
* writer(s) that were present when we entered will
|
|
* have left and we only have locking ones that will
|
|
* contend with us for the lock. This does not
|
|
* assure 100% access, but its good enough for a
|
|
* logging facility like this.
|
|
*/
|
|
did_delay = 1;
|
|
DELAY(10);
|
|
goto again;
|
|
}
|
|
}
|
|
SCTP_IP_PKTLOG_LOCK();
|
|
lenat = (int *)target;
|
|
*lenat = packet_log_end;
|
|
lenat++;
|
|
this_copy = min((length - sizeof(int)), SCTP_PACKET_LOG_SIZE);
|
|
memcpy((void *)lenat, (void *)packet_log_buffer, this_copy);
|
|
if (SCTP_PKTLOG_WRITERS_NEED_LOCK) {
|
|
atomic_subtract_int(&packet_log_writers,
|
|
SCTP_PKTLOG_WRITERS_NEED_LOCK);
|
|
}
|
|
SCTP_IP_PKTLOG_UNLOCK();
|
|
return (this_copy + sizeof(int));
|
|
}
|
|
|
|
#endif
|