892 lines
21 KiB
C
892 lines
21 KiB
C
/*
|
|
* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include "opt_inet6.h"
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/mbuf.h>
|
|
#include <sys/domain.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/protosw.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/socketvar.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/syslog.h>
|
|
|
|
#include <vm/vm_zone.h>
|
|
|
|
#include <net/if.h>
|
|
#include <net/route.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <netinet/in_systm.h>
|
|
#include <netinet/ip.h>
|
|
#ifdef INET6
|
|
#include <netinet/ip6.h>
|
|
#endif
|
|
#include <netinet/in_pcb.h>
|
|
#include <netinet/in_var.h>
|
|
#include <netinet/ip_var.h>
|
|
#ifdef INET6
|
|
#include <netinet6/ip6_var.h>
|
|
#endif
|
|
#include <netinet/ip_icmp.h>
|
|
#include <netinet/icmp_var.h>
|
|
#include <netinet/udp.h>
|
|
#include <netinet/udp_var.h>
|
|
|
|
#ifdef IPSEC
|
|
#include <netinet6/ipsec.h>
|
|
#endif /*IPSEC*/
|
|
|
|
/*
|
|
* UDP protocol implementation.
|
|
* Per RFC 768, August, 1980.
|
|
*/
|
|
#ifndef COMPAT_42
|
|
static int udpcksum = 1;
|
|
#else
|
|
static int udpcksum = 0; /* XXX */
|
|
#endif
|
|
SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
|
|
&udpcksum, 0, "");
|
|
|
|
int log_in_vain = 0;
|
|
SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW,
|
|
&log_in_vain, 0, "Log all incoming UDP packets");
|
|
|
|
static int blackhole = 0;
|
|
SYSCTL_INT(_net_inet_udp, OID_AUTO, blackhole, CTLFLAG_RW,
|
|
&blackhole, 0, "Do not send port unreachables for refused connects");
|
|
|
|
struct inpcbhead udb; /* from udp_var.h */
|
|
#define udb6 udb /* for KAME src sync over BSD*'s */
|
|
struct inpcbinfo udbinfo;
|
|
|
|
#ifndef UDBHASHSIZE
|
|
#define UDBHASHSIZE 16
|
|
#endif
|
|
|
|
struct udpstat udpstat; /* from udp_var.h */
|
|
SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD,
|
|
&udpstat, udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
|
|
|
|
static struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
|
|
#ifdef INET6
|
|
struct udp_in6 {
|
|
struct sockaddr_in6 uin6_sin;
|
|
u_char uin6_init_done : 1;
|
|
} udp_in6 = {
|
|
{ sizeof(udp_in6.uin6_sin), AF_INET6 },
|
|
0
|
|
};
|
|
struct udp_ip6 {
|
|
struct ip6_hdr uip6_ip6;
|
|
u_char uip6_init_done : 1;
|
|
} udp_ip6;
|
|
#endif /* INET6 */
|
|
|
|
static void udp_append __P((struct inpcb *last, struct ip *ip,
|
|
struct mbuf *n, int off));
|
|
#ifdef INET6
|
|
static void ip_2_ip6_hdr __P((struct ip6_hdr *ip6, struct ip *ip));
|
|
#endif
|
|
|
|
static int udp_detach __P((struct socket *so));
|
|
static int udp_output __P((struct inpcb *, struct mbuf *, struct sockaddr *,
|
|
struct mbuf *, struct proc *));
|
|
|
|
void
|
|
udp_init()
|
|
{
|
|
LIST_INIT(&udb);
|
|
udbinfo.listhead = &udb;
|
|
udbinfo.hashbase = hashinit(UDBHASHSIZE, M_PCB, &udbinfo.hashmask);
|
|
udbinfo.porthashbase = hashinit(UDBHASHSIZE, M_PCB,
|
|
&udbinfo.porthashmask);
|
|
udbinfo.ipi_zone = zinit("udpcb", sizeof(struct inpcb), maxsockets,
|
|
ZONE_INTERRUPT, 0);
|
|
}
|
|
|
|
void
|
|
udp_input(m, off, proto)
|
|
register struct mbuf *m;
|
|
int off, proto;
|
|
{
|
|
int iphlen = off;
|
|
register struct ip *ip;
|
|
register struct udphdr *uh;
|
|
register struct inpcb *inp;
|
|
struct mbuf *opts = 0;
|
|
int len;
|
|
struct ip save_ip;
|
|
struct sockaddr *append_sa;
|
|
|
|
udpstat.udps_ipackets++;
|
|
|
|
/*
|
|
* Strip IP options, if any; should skip this,
|
|
* make available to user, and use on returned packets,
|
|
* but we don't yet have a way to check the checksum
|
|
* with options still present.
|
|
*/
|
|
if (iphlen > sizeof (struct ip)) {
|
|
ip_stripoptions(m, (struct mbuf *)0);
|
|
iphlen = sizeof(struct ip);
|
|
}
|
|
|
|
/*
|
|
* Get IP and UDP header together in first mbuf.
|
|
*/
|
|
ip = mtod(m, struct ip *);
|
|
if (m->m_len < iphlen + sizeof(struct udphdr)) {
|
|
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) {
|
|
udpstat.udps_hdrops++;
|
|
return;
|
|
}
|
|
ip = mtod(m, struct ip *);
|
|
}
|
|
uh = (struct udphdr *)((caddr_t)ip + iphlen);
|
|
|
|
/*
|
|
* Make mbuf data length reflect UDP length.
|
|
* If not enough data to reflect UDP length, drop.
|
|
*/
|
|
len = ntohs((u_short)uh->uh_ulen);
|
|
if (ip->ip_len != len) {
|
|
if (len > ip->ip_len || len < sizeof(struct udphdr)) {
|
|
udpstat.udps_badlen++;
|
|
goto bad;
|
|
}
|
|
m_adj(m, len - ip->ip_len);
|
|
/* ip->ip_len = len; */
|
|
}
|
|
/*
|
|
* Save a copy of the IP header in case we want restore it
|
|
* for sending an ICMP error message in response.
|
|
*/
|
|
save_ip = *ip;
|
|
|
|
/*
|
|
* Checksum extended UDP header and data.
|
|
*/
|
|
if (uh->uh_sum) {
|
|
bzero(((struct ipovly *)ip)->ih_x1, 9);
|
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen;
|
|
uh->uh_sum = in_cksum(m, len + sizeof (struct ip));
|
|
if (uh->uh_sum) {
|
|
udpstat.udps_badsum++;
|
|
m_freem(m);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
|
|
in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
|
|
struct inpcb *last;
|
|
/*
|
|
* Deliver a multicast or broadcast datagram to *all* sockets
|
|
* for which the local and remote addresses and ports match
|
|
* those of the incoming datagram. This allows more than
|
|
* one process to receive multi/broadcasts on the same port.
|
|
* (This really ought to be done for unicast datagrams as
|
|
* well, but that would cause problems with existing
|
|
* applications that open both address-specific sockets and
|
|
* a wildcard socket listening to the same port -- they would
|
|
* end up receiving duplicates of every unicast datagram.
|
|
* Those applications open the multiple sockets to overcome an
|
|
* inadequacy of the UDP socket interface, but for backwards
|
|
* compatibility we avoid the problem here rather than
|
|
* fixing the interface. Maybe 4.5BSD will remedy this?)
|
|
*/
|
|
|
|
/*
|
|
* Construct sockaddr format source address.
|
|
*/
|
|
udp_in.sin_port = uh->uh_sport;
|
|
udp_in.sin_addr = ip->ip_src;
|
|
/*
|
|
* Locate pcb(s) for datagram.
|
|
* (Algorithm copied from raw_intr().)
|
|
*/
|
|
last = NULL;
|
|
#ifdef INET6
|
|
udp_in6.uin6_init_done = udp_ip6.uip6_init_done = 0;
|
|
#endif
|
|
LIST_FOREACH(inp, &udb, inp_list) {
|
|
#ifdef INET6
|
|
if ((inp->inp_vflag & INP_IPV4) == 0)
|
|
continue;
|
|
#endif
|
|
if (inp->inp_lport != uh->uh_dport)
|
|
continue;
|
|
if (inp->inp_laddr.s_addr != INADDR_ANY) {
|
|
if (inp->inp_laddr.s_addr !=
|
|
ip->ip_dst.s_addr)
|
|
continue;
|
|
}
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
if (inp->inp_faddr.s_addr !=
|
|
ip->ip_src.s_addr ||
|
|
inp->inp_fport != uh->uh_sport)
|
|
continue;
|
|
}
|
|
|
|
if (last != NULL) {
|
|
struct mbuf *n;
|
|
|
|
#ifdef IPSEC
|
|
/* check AH/ESP integrity. */
|
|
if (ipsec4_in_reject_so(m, last->inp_socket))
|
|
ipsecstat.in_polvio++;
|
|
/* do not inject data to pcb */
|
|
else
|
|
#endif /*IPSEC*/
|
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL)
|
|
udp_append(last, ip, n,
|
|
iphlen +
|
|
sizeof(struct udphdr));
|
|
}
|
|
last = inp;
|
|
/*
|
|
* Don't look for additional matches if this one does
|
|
* not have either the SO_REUSEPORT or SO_REUSEADDR
|
|
* socket options set. This heuristic avoids searching
|
|
* through all pcbs in the common case of a non-shared
|
|
* port. It * assumes that an application will never
|
|
* clear these options after setting them.
|
|
*/
|
|
if ((last->inp_socket->so_options&(SO_REUSEPORT|SO_REUSEADDR)) == 0)
|
|
break;
|
|
}
|
|
|
|
if (last == NULL) {
|
|
/*
|
|
* No matching pcb found; discard datagram.
|
|
* (No need to send an ICMP Port Unreachable
|
|
* for a broadcast or multicast datgram.)
|
|
*/
|
|
udpstat.udps_noportbcast++;
|
|
goto bad;
|
|
}
|
|
#ifdef IPSEC
|
|
/* check AH/ESP integrity. */
|
|
if (ipsec4_in_reject_so(m, last->inp_socket)) {
|
|
ipsecstat.in_polvio++;
|
|
goto bad;
|
|
}
|
|
#endif /*IPSEC*/
|
|
udp_append(last, ip, m, iphlen + sizeof(struct udphdr));
|
|
return;
|
|
}
|
|
/*
|
|
* Locate pcb for datagram.
|
|
*/
|
|
inp = in_pcblookup_hash(&udbinfo, ip->ip_src, uh->uh_sport,
|
|
ip->ip_dst, uh->uh_dport, 1, m->m_pkthdr.rcvif);
|
|
if (inp == NULL) {
|
|
if (log_in_vain) {
|
|
char buf[4*sizeof "123"];
|
|
|
|
strcpy(buf, inet_ntoa(ip->ip_dst));
|
|
log(LOG_INFO,
|
|
"Connection attempt to UDP %s:%d from %s:%d\n",
|
|
buf, ntohs(uh->uh_dport), inet_ntoa(ip->ip_src),
|
|
ntohs(uh->uh_sport));
|
|
}
|
|
udpstat.udps_noport++;
|
|
if (m->m_flags & (M_BCAST | M_MCAST)) {
|
|
udpstat.udps_noportbcast++;
|
|
goto bad;
|
|
}
|
|
*ip = save_ip;
|
|
#ifdef ICMP_BANDLIM
|
|
if (badport_bandlim(0) < 0)
|
|
goto bad;
|
|
#endif
|
|
if (!blackhole)
|
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0);
|
|
else
|
|
goto bad;
|
|
return;
|
|
}
|
|
#ifdef IPSEC
|
|
if (ipsec4_in_reject_so(m, inp->inp_socket)) {
|
|
ipsecstat.in_polvio++;
|
|
goto bad;
|
|
}
|
|
#endif /*IPSEC*/
|
|
|
|
/*
|
|
* Construct sockaddr format source address.
|
|
* Stuff source address and datagram in user buffer.
|
|
*/
|
|
udp_in.sin_port = uh->uh_sport;
|
|
udp_in.sin_addr = ip->ip_src;
|
|
if (inp->inp_flags & INP_CONTROLOPTS
|
|
|| inp->inp_socket->so_options & SO_TIMESTAMP) {
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6) {
|
|
int savedflags;
|
|
|
|
ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
|
|
savedflags = inp->inp_flags;
|
|
inp->inp_flags &= ~INP_UNMAPPABLEOPTS;
|
|
ip6_savecontrol(inp, &opts, &udp_ip6.uip6_ip6, m);
|
|
inp->inp_flags = savedflags;
|
|
} else
|
|
#endif
|
|
ip_savecontrol(inp, &opts, ip, m);
|
|
}
|
|
iphlen += sizeof(struct udphdr);
|
|
m_adj(m, iphlen);
|
|
#ifdef INET6
|
|
if (inp->inp_vflag & INP_IPV6) {
|
|
in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
|
|
append_sa = (struct sockaddr *)&udp_in6;
|
|
} else
|
|
#endif
|
|
append_sa = (struct sockaddr *)&udp_in;
|
|
if (sbappendaddr(&inp->inp_socket->so_rcv, append_sa, m, opts) == 0) {
|
|
udpstat.udps_fullsock++;
|
|
goto bad;
|
|
}
|
|
sorwakeup(inp->inp_socket);
|
|
return;
|
|
bad:
|
|
m_freem(m);
|
|
if (opts)
|
|
m_freem(opts);
|
|
return;
|
|
}
|
|
|
|
#if defined(INET6)
|
|
static void
|
|
ip_2_ip6_hdr(ip6, ip)
|
|
struct ip6_hdr *ip6;
|
|
struct ip *ip;
|
|
{
|
|
bzero(ip6, sizeof(*ip6));
|
|
|
|
ip6->ip6_vfc = IPV6_VERSION;
|
|
ip6->ip6_plen = ip->ip_len;
|
|
ip6->ip6_nxt = ip->ip_p;
|
|
ip6->ip6_hlim = ip->ip_ttl;
|
|
ip6->ip6_src.s6_addr32[2] = ip6->ip6_dst.s6_addr32[2] =
|
|
IPV6_ADDR_INT32_SMP;
|
|
ip6->ip6_src.s6_addr32[3] = ip->ip_src.s_addr;
|
|
ip6->ip6_dst.s6_addr32[3] = ip->ip_dst.s_addr;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* subroutine of udp_input(), mainly for source code readability.
|
|
* caller must properly init udp_ip6 and udp_in6 beforehand.
|
|
*/
|
|
static void
|
|
udp_append(last, ip, n, off)
|
|
struct inpcb *last;
|
|
struct ip *ip;
|
|
struct mbuf *n;
|
|
int off;
|
|
{
|
|
struct sockaddr *append_sa;
|
|
struct mbuf *opts = 0;
|
|
|
|
if (last->inp_flags & INP_CONTROLOPTS ||
|
|
last->inp_socket->so_options & SO_TIMESTAMP) {
|
|
#ifdef INET6
|
|
if (last->inp_vflag & INP_IPV6) {
|
|
int savedflags;
|
|
|
|
if (udp_ip6.uip6_init_done == 0) {
|
|
ip_2_ip6_hdr(&udp_ip6.uip6_ip6, ip);
|
|
udp_ip6.uip6_init_done = 1;
|
|
}
|
|
savedflags = last->inp_flags;
|
|
last->inp_flags &= ~INP_UNMAPPABLEOPTS;
|
|
ip6_savecontrol(last, &opts, &udp_ip6.uip6_ip6, n);
|
|
last->inp_flags = savedflags;
|
|
} else
|
|
#endif
|
|
ip_savecontrol(last, &opts, ip, n);
|
|
}
|
|
#ifdef INET6
|
|
if (last->inp_vflag & INP_IPV6) {
|
|
if (udp_in6.uin6_init_done == 0) {
|
|
in6_sin_2_v4mapsin6(&udp_in, &udp_in6.uin6_sin);
|
|
udp_in6.uin6_init_done = 1;
|
|
}
|
|
append_sa = (struct sockaddr *)&udp_in6.uin6_sin;
|
|
} else
|
|
#endif
|
|
append_sa = (struct sockaddr *)&udp_in;
|
|
m_adj(n, off);
|
|
if (sbappendaddr(&last->inp_socket->so_rcv, append_sa, n, opts) == 0) {
|
|
m_freem(n);
|
|
if (opts)
|
|
m_freem(opts);
|
|
udpstat.udps_fullsock++;
|
|
} else
|
|
sorwakeup(last->inp_socket);
|
|
}
|
|
|
|
/*
|
|
* Notify a udp user of an asynchronous error;
|
|
* just wake up so that he can collect error status.
|
|
*/
|
|
void
|
|
udp_notify(inp, errno)
|
|
register struct inpcb *inp;
|
|
int errno;
|
|
{
|
|
inp->inp_socket->so_error = errno;
|
|
sorwakeup(inp->inp_socket);
|
|
sowwakeup(inp->inp_socket);
|
|
}
|
|
|
|
void
|
|
udp_ctlinput(cmd, sa, vip)
|
|
int cmd;
|
|
struct sockaddr *sa;
|
|
void *vip;
|
|
{
|
|
register struct ip *ip = vip;
|
|
register struct udphdr *uh;
|
|
|
|
if (!PRC_IS_REDIRECT(cmd) &&
|
|
((unsigned)cmd >= PRC_NCMDS || inetctlerrmap[cmd] == 0))
|
|
return;
|
|
if (ip) {
|
|
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
|
|
in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport,
|
|
cmd, udp_notify);
|
|
} else
|
|
in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify);
|
|
}
|
|
|
|
static int
|
|
udp_pcblist SYSCTL_HANDLER_ARGS
|
|
{
|
|
int error, i, n, s;
|
|
struct inpcb *inp, **inp_list;
|
|
inp_gen_t gencnt;
|
|
struct xinpgen xig;
|
|
|
|
/*
|
|
* The process of preparing the TCB list is too time-consuming and
|
|
* resource-intensive to repeat twice on every request.
|
|
*/
|
|
if (req->oldptr == 0) {
|
|
n = udbinfo.ipi_count;
|
|
req->oldidx = 2 * (sizeof xig)
|
|
+ (n + n/8) * sizeof(struct xinpcb);
|
|
return 0;
|
|
}
|
|
|
|
if (req->newptr != 0)
|
|
return EPERM;
|
|
|
|
/*
|
|
* OK, now we're committed to doing something.
|
|
*/
|
|
s = splnet();
|
|
gencnt = udbinfo.ipi_gencnt;
|
|
n = udbinfo.ipi_count;
|
|
splx(s);
|
|
|
|
xig.xig_len = sizeof xig;
|
|
xig.xig_count = n;
|
|
xig.xig_gen = gencnt;
|
|
xig.xig_sogen = so_gencnt;
|
|
error = SYSCTL_OUT(req, &xig, sizeof xig);
|
|
if (error)
|
|
return error;
|
|
|
|
inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
|
|
if (inp_list == 0)
|
|
return ENOMEM;
|
|
|
|
s = splnet();
|
|
for (inp = udbinfo.listhead->lh_first, i = 0; inp && i < n;
|
|
inp = inp->inp_list.le_next) {
|
|
if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->p, inp))
|
|
inp_list[i++] = inp;
|
|
}
|
|
splx(s);
|
|
n = i;
|
|
|
|
error = 0;
|
|
for (i = 0; i < n; i++) {
|
|
inp = inp_list[i];
|
|
if (inp->inp_gencnt <= gencnt) {
|
|
struct xinpcb xi;
|
|
xi.xi_len = sizeof xi;
|
|
/* XXX should avoid extra copy */
|
|
bcopy(inp, &xi.xi_inp, sizeof *inp);
|
|
if (inp->inp_socket)
|
|
sotoxsocket(inp->inp_socket, &xi.xi_socket);
|
|
error = SYSCTL_OUT(req, &xi, sizeof xi);
|
|
}
|
|
}
|
|
if (!error) {
|
|
/*
|
|
* Give the user an updated idea of our state.
|
|
* If the generation differs from what we told
|
|
* her before, she knows that something happened
|
|
* while we were processing this request, and it
|
|
* might be necessary to retry.
|
|
*/
|
|
s = splnet();
|
|
xig.xig_gen = udbinfo.ipi_gencnt;
|
|
xig.xig_sogen = so_gencnt;
|
|
xig.xig_count = udbinfo.ipi_count;
|
|
splx(s);
|
|
error = SYSCTL_OUT(req, &xig, sizeof xig);
|
|
}
|
|
free(inp_list, M_TEMP);
|
|
return error;
|
|
}
|
|
|
|
SYSCTL_PROC(_net_inet_udp, UDPCTL_PCBLIST, pcblist, CTLFLAG_RD, 0, 0,
|
|
udp_pcblist, "S,xinpcb", "List of active UDP sockets");
|
|
|
|
static int
|
|
udp_getcred SYSCTL_HANDLER_ARGS
|
|
{
|
|
struct sockaddr_in addrs[2];
|
|
struct inpcb *inp;
|
|
int error, s;
|
|
|
|
error = suser(req->p);
|
|
if (error)
|
|
return (error);
|
|
error = SYSCTL_IN(req, addrs, sizeof(addrs));
|
|
if (error)
|
|
return (error);
|
|
s = splnet();
|
|
inp = in_pcblookup_hash(&udbinfo, addrs[1].sin_addr, addrs[1].sin_port,
|
|
addrs[0].sin_addr, addrs[0].sin_port, 1, NULL);
|
|
if (inp == NULL || inp->inp_socket == NULL) {
|
|
error = ENOENT;
|
|
goto out;
|
|
}
|
|
error = SYSCTL_OUT(req, inp->inp_socket->so_cred, sizeof(struct ucred));
|
|
out:
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_PROC(_net_inet_udp, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW,
|
|
0, 0, udp_getcred, "S,ucred", "Get the ucred of a UDP connection");
|
|
|
|
static int
|
|
udp_output(inp, m, addr, control, p)
|
|
register struct inpcb *inp;
|
|
struct mbuf *m;
|
|
struct sockaddr *addr;
|
|
struct mbuf *control;
|
|
struct proc *p;
|
|
{
|
|
register struct udpiphdr *ui;
|
|
register int len = m->m_pkthdr.len;
|
|
struct in_addr laddr;
|
|
struct sockaddr_in *sin;
|
|
int s = 0, error = 0;
|
|
|
|
if (control)
|
|
m_freem(control); /* XXX */
|
|
|
|
if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) {
|
|
error = EMSGSIZE;
|
|
goto release;
|
|
}
|
|
|
|
if (addr) {
|
|
sin = (struct sockaddr_in *)addr;
|
|
prison_remote_ip(p, 0, &sin->sin_addr.s_addr);
|
|
laddr = inp->inp_laddr;
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
error = EISCONN;
|
|
goto release;
|
|
}
|
|
/*
|
|
* Must block input while temporarily connected.
|
|
*/
|
|
s = splnet();
|
|
error = in_pcbconnect(inp, addr, p);
|
|
if (error) {
|
|
splx(s);
|
|
goto release;
|
|
}
|
|
} else {
|
|
if (inp->inp_faddr.s_addr == INADDR_ANY) {
|
|
error = ENOTCONN;
|
|
goto release;
|
|
}
|
|
}
|
|
/*
|
|
* Calculate data length and get a mbuf
|
|
* for UDP and IP headers.
|
|
*/
|
|
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
|
|
if (m == 0) {
|
|
error = ENOBUFS;
|
|
if (addr)
|
|
splx(s);
|
|
goto release;
|
|
}
|
|
|
|
/*
|
|
* Fill in mbuf with extended UDP header
|
|
* and addresses and length put into network format.
|
|
*/
|
|
ui = mtod(m, struct udpiphdr *);
|
|
bzero(ui->ui_x1, sizeof(ui->ui_x1));
|
|
ui->ui_pr = IPPROTO_UDP;
|
|
ui->ui_len = htons((u_short)len + sizeof (struct udphdr));
|
|
ui->ui_src = inp->inp_laddr;
|
|
ui->ui_dst = inp->inp_faddr;
|
|
ui->ui_sport = inp->inp_lport;
|
|
ui->ui_dport = inp->inp_fport;
|
|
ui->ui_ulen = ui->ui_len;
|
|
|
|
/*
|
|
* Stuff checksum and output datagram.
|
|
*/
|
|
ui->ui_sum = 0;
|
|
if (udpcksum) {
|
|
if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
|
|
ui->ui_sum = 0xffff;
|
|
}
|
|
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
|
|
((struct ip *)ui)->ip_ttl = inp->inp_ip_ttl; /* XXX */
|
|
((struct ip *)ui)->ip_tos = inp->inp_ip_tos; /* XXX */
|
|
udpstat.udps_opackets++;
|
|
|
|
#ifdef IPSEC
|
|
m->m_pkthdr.rcvif = (struct ifnet *)inp->inp_socket;
|
|
#endif /*IPSEC*/
|
|
|
|
error = ip_output(m, inp->inp_options, &inp->inp_route,
|
|
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST),
|
|
inp->inp_moptions);
|
|
|
|
if (addr) {
|
|
in_pcbdisconnect(inp);
|
|
inp->inp_laddr = laddr; /* XXX rehash? */
|
|
splx(s);
|
|
}
|
|
return (error);
|
|
|
|
release:
|
|
m_freem(m);
|
|
return (error);
|
|
}
|
|
|
|
u_long udp_sendspace = 9216; /* really max datagram size */
|
|
/* 40 1K datagrams */
|
|
SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
|
|
&udp_sendspace, 0, "Maximum outgoing UDP datagram size");
|
|
|
|
u_long udp_recvspace = 40 * (1024 +
|
|
#ifdef INET6
|
|
sizeof(struct sockaddr_in6)
|
|
#else
|
|
sizeof(struct sockaddr_in)
|
|
#endif
|
|
);
|
|
SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
|
|
&udp_recvspace, 0, "Maximum incoming UDP datagram size");
|
|
|
|
static int
|
|
udp_abort(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
int s;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0)
|
|
return EINVAL; /* ??? possible? panic instead? */
|
|
soisdisconnected(so);
|
|
s = splnet();
|
|
in_pcbdetach(inp);
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp_attach(struct socket *so, int proto, struct proc *p)
|
|
{
|
|
struct inpcb *inp;
|
|
int s, error;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp != 0)
|
|
return EINVAL;
|
|
|
|
error = soreserve(so, udp_sendspace, udp_recvspace);
|
|
if (error)
|
|
return error;
|
|
s = splnet();
|
|
error = in_pcballoc(so, &udbinfo, p);
|
|
splx(s);
|
|
if (error)
|
|
return error;
|
|
|
|
inp = (struct inpcb *)so->so_pcb;
|
|
inp->inp_vflag |= INP_IPV4;
|
|
inp->inp_ip_ttl = ip_defttl;
|
|
#ifdef IPSEC
|
|
error = ipsec_init_policy(so, &inp->inp_sp);
|
|
if (error != 0) {
|
|
in_pcbdetach(inp);
|
|
return error;
|
|
}
|
|
#endif /*IPSEC*/
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
|
|
{
|
|
struct inpcb *inp;
|
|
int s, error;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0)
|
|
return EINVAL;
|
|
s = splnet();
|
|
error = in_pcbbind(inp, nam, p);
|
|
splx(s);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
udp_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
|
|
{
|
|
struct inpcb *inp;
|
|
int s, error;
|
|
struct sockaddr_in *sin;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0)
|
|
return EINVAL;
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY)
|
|
return EISCONN;
|
|
s = splnet();
|
|
sin = (struct sockaddr_in *)nam;
|
|
prison_remote_ip(p, 0, &sin->sin_addr.s_addr);
|
|
error = in_pcbconnect(inp, nam, p);
|
|
splx(s);
|
|
if (error == 0)
|
|
soisconnected(so);
|
|
return error;
|
|
}
|
|
|
|
static int
|
|
udp_detach(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
int s;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0)
|
|
return EINVAL;
|
|
s = splnet();
|
|
in_pcbdetach(inp);
|
|
splx(s);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp_disconnect(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
int s;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0)
|
|
return EINVAL;
|
|
if (inp->inp_faddr.s_addr == INADDR_ANY)
|
|
return ENOTCONN;
|
|
|
|
s = splnet();
|
|
in_pcbdisconnect(inp);
|
|
inp->inp_laddr.s_addr = INADDR_ANY;
|
|
splx(s);
|
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
udp_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
|
|
struct mbuf *control, struct proc *p)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0) {
|
|
m_freem(m);
|
|
return EINVAL;
|
|
}
|
|
return udp_output(inp, m, addr, control, p);
|
|
}
|
|
|
|
int
|
|
udp_shutdown(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == 0)
|
|
return EINVAL;
|
|
socantsendmore(so);
|
|
return 0;
|
|
}
|
|
|
|
struct pr_usrreqs udp_usrreqs = {
|
|
udp_abort, pru_accept_notsupp, udp_attach, udp_bind, udp_connect,
|
|
pru_connect2_notsupp, in_control, udp_detach, udp_disconnect,
|
|
pru_listen_notsupp, in_setpeeraddr, pru_rcvd_notsupp,
|
|
pru_rcvoob_notsupp, udp_send, pru_sense_null, udp_shutdown,
|
|
in_setsockaddr, sosend, soreceive, sopoll
|
|
};
|
|
|