version 1.6, 1994/01/08 21:22:06 |
version 1.79, 2001/06/27 23:40:50 |
|
|
|
/* $NetBSD$ */ |
|
|
/* |
/* |
* Copyright (c) 1982, 1986, 1988, 1990 Regents of the University of California. |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* All rights reserved. |
* 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. Neither the name of the project 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 PROJECT 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 PROJECT 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. |
|
*/ |
|
|
|
/* |
|
* 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 |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* modification, are permitted provided that the following conditions |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
* SUCH DAMAGE. |
* SUCH DAMAGE. |
* |
* |
* from: @(#)udp_usrreq.c 7.20 (Berkeley) 4/20/91 |
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
* $Id$ |
|
*/ |
*/ |
|
|
|
#include "opt_inet.h" |
|
#include "opt_ipsec.h" |
|
#include "opt_inet_csum.h" |
|
#include "opt_ipkdb.h" |
|
|
#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/malloc.h> |
#include <sys/malloc.h> |
#include <sys/mbuf.h> |
#include <sys/mbuf.h> |
#include <sys/protosw.h> |
#include <sys/protosw.h> |
#include <sys/socket.h> |
#include <sys/socket.h> |
#include <sys/socketvar.h> |
#include <sys/socketvar.h> |
|
#include <sys/errno.h> |
#include <sys/stat.h> |
#include <sys/stat.h> |
|
#include <sys/systm.h> |
|
#include <sys/proc.h> |
|
#include <sys/domain.h> |
|
|
|
#include <uvm/uvm_extern.h> |
|
#include <sys/sysctl.h> |
|
|
#include <net/if.h> |
#include <net/if.h> |
#include <net/route.h> |
#include <net/route.h> |
|
|
#include <netinet/in.h> |
#include <netinet/in.h> |
#include <netinet/in_systm.h> |
#include <netinet/in_systm.h> |
#include <netinet/ip.h> |
#include <netinet/in_var.h> |
#include <netinet/in_pcb.h> |
#include <netinet/ip.h> |
#include <netinet/ip_var.h> |
#include <netinet/in_pcb.h> |
#include <netinet/ip_icmp.h> |
#include <netinet/ip_var.h> |
#include <netinet/udp.h> |
#include <netinet/ip_icmp.h> |
#include <netinet/udp_var.h> |
#include <netinet/udp.h> |
|
#include <netinet/udp_var.h> |
|
|
|
#ifdef INET6 |
|
#include <netinet/ip6.h> |
|
#include <netinet/icmp6.h> |
|
#include <netinet6/ip6_var.h> |
|
#include <netinet6/in6_pcb.h> |
|
#include <netinet6/udp6_var.h> |
|
#endif |
|
|
|
#ifdef PULLDOWN_TEST |
|
#ifndef INET6 |
|
/* always need ip6.h for IP6_EXTHDR_GET */ |
|
#include <netinet/ip6.h> |
|
#endif |
|
#endif |
|
|
|
#include "faith.h" |
|
#if defined(NFAITH) && NFAITH > 0 |
|
#include <net/if_faith.h> |
|
#endif |
|
|
|
#include <machine/stdarg.h> |
|
|
|
#ifdef IPSEC |
|
#include <netinet6/ipsec.h> |
|
#include <netkey/key.h> |
|
#endif /*IPSEC*/ |
|
|
|
#ifdef IPKDB |
|
#include <ipkdb/ipkdb.h> |
|
#endif |
|
|
|
/* |
|
* UDP protocol implementation. |
|
* Per RFC 768, August, 1980. |
|
*/ |
|
#ifndef COMPAT_42 |
|
int udpcksum = 1; |
|
#else |
|
int udpcksum = 0; /* XXX */ |
|
#endif |
|
|
|
#ifdef INET |
|
static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, |
|
struct socket *)); |
|
static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, |
|
struct mbuf *, int)); |
|
#endif |
|
#ifdef INET6 |
|
static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, |
|
struct socket *)); |
|
static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, |
|
struct ifnet *)); |
|
static int udp6_realinput __P((int, struct sockaddr_in6 *, |
|
struct sockaddr_in6 *, struct mbuf *, int)); |
|
#endif |
|
#ifdef INET |
|
static void udp_notify __P((struct inpcb *, int)); |
|
#endif |
|
|
|
#ifndef UDBHASHSIZE |
|
#define UDBHASHSIZE 128 |
|
#endif |
|
int udbhashsize = UDBHASHSIZE; |
|
|
|
#ifdef UDP_CSUM_COUNTERS |
|
#include <sys/device.h> |
|
|
|
struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
|
NULL, "udp", "hwcsum bad"); |
|
struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
|
NULL, "udp", "hwcsum ok"); |
|
struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
|
NULL, "udp", "hwcsum data"); |
|
struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
|
NULL, "udp", "swcsum"); |
|
|
|
#define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
|
|
|
#else |
|
|
|
#define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ |
|
|
|
#endif /* UDP_CSUM_COUNTERS */ |
|
|
|
void |
|
udp_init() |
|
{ |
|
|
|
#ifdef INET |
|
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
|
#endif |
|
|
|
#ifdef UDP_CSUM_COUNTERS |
|
evcnt_attach_static(&udp_hwcsum_bad); |
|
evcnt_attach_static(&udp_hwcsum_ok); |
|
evcnt_attach_static(&udp_hwcsum_data); |
|
evcnt_attach_static(&udp_swcsum); |
|
#endif /* UDP_CSUM_COUNTERS */ |
|
} |
|
|
|
#ifndef UDP6 |
|
#ifdef INET |
|
void |
|
#if __STDC__ |
|
udp_input(struct mbuf *m, ...) |
|
#else |
|
udp_input(m, va_alist) |
|
struct mbuf *m; |
|
va_dcl |
|
#endif |
|
{ |
|
va_list ap; |
|
struct sockaddr_in src, dst; |
|
struct ip *ip; |
|
struct udphdr *uh; |
|
int iphlen, proto; |
|
int len; |
|
int n; |
|
|
|
va_start(ap, m); |
|
iphlen = va_arg(ap, int); |
|
proto = va_arg(ap, int); |
|
va_end(ap); |
|
|
|
udpstat.udps_ipackets++; |
|
|
|
#ifndef PULLDOWN_TEST |
|
/* |
|
* 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); |
|
} |
|
#else |
|
/* |
|
* we may enable the above code if we save and pass IPv4 options |
|
* to the userland. |
|
*/ |
|
#endif |
|
|
|
/* |
|
* Get IP and UDP header together in first mbuf. |
|
*/ |
|
ip = mtod(m, struct ip *); |
|
#ifndef PULLDOWN_TEST |
|
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); |
|
#else |
|
IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); |
|
if (uh == NULL) { |
|
udpstat.udps_hdrops++; |
|
return; |
|
} |
|
#endif |
|
|
|
/* destination port of 0 is illegal, based on RFC768. */ |
|
if (uh->uh_dport == 0) |
|
goto bad; |
|
|
|
/* |
|
* Make mbuf data length reflect UDP length. |
|
* If not enough data to reflect UDP length, drop. |
|
*/ |
|
len = ntohs((u_int16_t)uh->uh_ulen); |
|
if (ip->ip_len != iphlen + len) { |
|
if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
|
udpstat.udps_badlen++; |
|
goto bad; |
|
} |
|
m_adj(m, iphlen + len - ip->ip_len); |
|
} |
|
|
|
/* |
|
* Checksum extended UDP header and data. |
|
*/ |
|
if (uh->uh_sum) { |
|
switch (m->m_pkthdr.csum_flags & |
|
((m->m_pkthdr.rcvif->if_csum_flags & M_CSUM_UDPv4) | |
|
M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
|
case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: |
|
UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad); |
|
goto badcsum; |
|
|
|
case M_CSUM_UDPv4|M_CSUM_DATA: |
|
UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data); |
|
if ((m->m_pkthdr.csum_data ^ 0xffff) != 0) |
|
goto badcsum; |
|
break; |
|
|
|
case M_CSUM_UDPv4: |
|
/* Checksum was okay. */ |
|
UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok); |
|
break; |
|
|
|
default: |
|
/* Need to compute it ourselves. */ |
|
UDP_CSUM_COUNTER_INCR(&udp_swcsum); |
|
if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) |
|
goto badcsum; |
|
break; |
|
} |
|
} |
|
|
|
/* construct source and dst sockaddrs. */ |
|
bzero(&src, sizeof(src)); |
|
src.sin_family = AF_INET; |
|
src.sin_len = sizeof(struct sockaddr_in); |
|
bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); |
|
src.sin_port = uh->uh_sport; |
|
bzero(&dst, sizeof(dst)); |
|
dst.sin_family = AF_INET; |
|
dst.sin_len = sizeof(struct sockaddr_in); |
|
bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); |
|
dst.sin_port = uh->uh_dport; |
|
|
|
n = udp4_realinput(&src, &dst, m, iphlen); |
|
#ifdef INET6 |
|
if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { |
|
struct sockaddr_in6 src6, dst6; |
|
|
|
bzero(&src6, sizeof(src6)); |
|
src6.sin6_family = AF_INET6; |
|
src6.sin6_len = sizeof(struct sockaddr_in6); |
|
src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; |
|
bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], |
|
sizeof(ip->ip_src)); |
|
src6.sin6_port = uh->uh_sport; |
|
bzero(&dst6, sizeof(dst6)); |
|
dst6.sin6_family = AF_INET6; |
|
dst6.sin6_len = sizeof(struct sockaddr_in6); |
|
dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; |
|
bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], |
|
sizeof(ip->ip_dst)); |
|
dst6.sin6_port = uh->uh_dport; |
|
|
|
n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); |
|
} |
|
#endif |
|
|
|
if (n == 0) { |
|
if (m->m_flags & (M_BCAST | M_MCAST)) { |
|
udpstat.udps_noportbcast++; |
|
goto bad; |
|
} |
|
udpstat.udps_noport++; |
|
#ifdef IPKDB |
|
if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, |
|
m, iphlen + sizeof(struct udphdr), |
|
m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { |
|
/* |
|
* It was a debugger connect packet, |
|
* just drop it now |
|
*/ |
|
goto bad; |
|
} |
|
#endif |
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
|
m = NULL; |
|
} |
|
|
|
bad: |
|
if (m) |
|
m_freem(m); |
|
return; |
|
|
|
badcsum: |
|
m_freem(m); |
|
udpstat.udps_badsum++; |
|
} |
|
#endif |
|
|
|
#ifdef INET6 |
|
int |
|
udp6_input(mp, offp, proto) |
|
struct mbuf **mp; |
|
int *offp, proto; |
|
{ |
|
struct mbuf *m = *mp; |
|
int off = *offp; |
|
struct sockaddr_in6 src, dst; |
|
struct ip6_hdr *ip6; |
|
struct udphdr *uh; |
|
u_int32_t plen, ulen; |
|
|
|
#ifndef PULLDOWN_TEST |
|
IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); |
|
#endif |
|
ip6 = mtod(m, struct ip6_hdr *); |
|
|
|
#if defined(NFAITH) && 0 < NFAITH |
|
if (faithprefix(&ip6->ip6_dst)) { |
|
/* send icmp6 host unreach? */ |
|
m_freem(m); |
|
return IPPROTO_DONE; |
|
} |
|
#endif |
|
|
|
udp6stat.udp6s_ipackets++; |
|
|
|
/* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ |
|
plen = m->m_pkthdr.len - off; |
|
#ifndef PULLDOWN_TEST |
|
uh = (struct udphdr *)((caddr_t)ip6 + off); |
|
#else |
|
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); |
|
if (uh == NULL) { |
|
ip6stat.ip6s_tooshort++; |
|
return IPPROTO_DONE; |
|
} |
|
#endif |
|
ulen = ntohs((u_short)uh->uh_ulen); |
|
/* |
|
* RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
|
* iff payload length > 0xffff. |
|
*/ |
|
if (ulen == 0 && plen > 0xffff) |
|
ulen = plen; |
|
|
|
if (plen != ulen) { |
|
udp6stat.udp6s_badlen++; |
|
goto bad; |
|
} |
|
|
|
/* destination port of 0 is illegal, based on RFC768. */ |
|
if (uh->uh_dport == 0) |
|
goto bad; |
|
|
|
/* Be proactive about malicious use of IPv4 mapped address */ |
|
if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
|
IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
|
/* XXX stat */ |
|
goto bad; |
|
} |
|
|
|
/* |
|
* Checksum extended UDP header and data. |
|
*/ |
|
if (uh->uh_sum == 0) |
|
udp6stat.udp6s_nosum++; |
|
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { |
|
udp6stat.udp6s_badsum++; |
|
goto bad; |
|
} |
|
|
|
/* |
|
* Construct source and dst sockaddrs. |
|
* Note that ifindex (s6_addr16[1]) is already filled. |
|
*/ |
|
bzero(&src, sizeof(src)); |
|
src.sin6_family = AF_INET6; |
|
src.sin6_len = sizeof(struct sockaddr_in6); |
|
/* KAME hack: recover scopeid */ |
|
(void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif); |
|
src.sin6_port = uh->uh_sport; |
|
bzero(&dst, sizeof(dst)); |
|
dst.sin6_family = AF_INET6; |
|
dst.sin6_len = sizeof(struct sockaddr_in6); |
|
/* KAME hack: recover scopeid */ |
|
(void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif); |
|
dst.sin6_port = uh->uh_dport; |
|
|
|
if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { |
|
if (m->m_flags & M_MCAST) { |
|
udp6stat.udp6s_noportmcast++; |
|
goto bad; |
|
} |
|
udp6stat.udp6s_noport++; |
|
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); |
|
m = NULL; |
|
} |
|
|
|
bad: |
|
if (m) |
|
m_freem(m); |
|
return IPPROTO_DONE; |
|
} |
|
#endif |
|
|
|
#ifdef INET |
|
static void |
|
udp4_sendup(m, off, src, so) |
|
struct mbuf *m; |
|
int off; /* offset of data portion */ |
|
struct sockaddr *src; |
|
struct socket *so; |
|
{ |
|
struct mbuf *opts = NULL; |
|
struct mbuf *n; |
|
struct inpcb *inp = NULL; |
|
#ifdef INET6 |
|
struct in6pcb *in6p = NULL; |
|
#endif |
|
|
|
if (!so) |
|
return; |
|
switch (so->so_proto->pr_domain->dom_family) { |
|
case AF_INET: |
|
inp = sotoinpcb(so); |
|
break; |
|
#ifdef INET6 |
|
case AF_INET6: |
|
in6p = sotoin6pcb(so); |
|
break; |
|
#endif |
|
default: |
|
return; |
|
} |
|
|
|
#ifdef IPSEC |
|
/* check AH/ESP integrity. */ |
|
if (so != NULL && ipsec4_in_reject_so(m, so)) { |
|
ipsecstat.in_polvio++; |
|
return; |
|
} |
|
#endif /*IPSEC*/ |
|
|
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
|
if (inp && (inp->inp_flags & INP_CONTROLOPTS |
|
|| so->so_options & SO_TIMESTAMP)) { |
|
struct ip *ip = mtod(n, struct ip *); |
|
ip_savecontrol(inp, &opts, ip, n); |
|
} |
|
|
|
m_adj(n, off); |
|
if (sbappendaddr(&so->so_rcv, src, n, |
|
opts) == 0) { |
|
m_freem(n); |
|
if (opts) |
|
m_freem(opts); |
|
} else |
|
sorwakeup(so); |
|
} |
|
} |
|
#endif |
|
|
|
#ifdef INET6 |
|
static void |
|
udp6_sendup(m, off, src, so) |
|
struct mbuf *m; |
|
int off; /* offset of data portion */ |
|
struct sockaddr *src; |
|
struct socket *so; |
|
{ |
|
struct mbuf *opts = NULL; |
|
struct mbuf *n; |
|
struct in6pcb *in6p = NULL; |
|
|
|
if (!so) |
|
return; |
|
if (so->so_proto->pr_domain->dom_family != AF_INET6) |
|
return; |
|
in6p = sotoin6pcb(so); |
|
|
|
#ifdef IPSEC |
|
/* check AH/ESP integrity. */ |
|
if (so != NULL && ipsec6_in_reject_so(m, so)) { |
|
ipsec6stat.in_polvio++; |
|
return; |
|
} |
|
#endif /*IPSEC*/ |
|
|
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
|
if (in6p && (in6p->in6p_flags & IN6P_CONTROLOPTS |
|
|| in6p->in6p_socket->so_options & SO_TIMESTAMP)) { |
|
struct ip6_hdr *ip6 = mtod(n, struct ip6_hdr *); |
|
ip6_savecontrol(in6p, &opts, ip6, n); |
|
} |
|
|
|
m_adj(n, off); |
|
if (sbappendaddr(&so->so_rcv, src, n, opts) == 0) { |
|
m_freem(n); |
|
if (opts) |
|
m_freem(opts); |
|
udp6stat.udp6s_fullsock++; |
|
} else |
|
sorwakeup(so); |
|
} |
|
} |
|
#endif |
|
|
|
#ifdef INET |
|
static int |
|
udp4_realinput(src, dst, m, off) |
|
struct sockaddr_in *src; |
|
struct sockaddr_in *dst; |
|
struct mbuf *m; |
|
int off; /* offset of udphdr */ |
|
{ |
|
u_int16_t *sport, *dport; |
|
int rcvcnt; |
|
struct in_addr *src4, *dst4; |
|
struct inpcb *inp; |
|
|
|
rcvcnt = 0; |
|
off += sizeof(struct udphdr); /* now, offset of payload */ |
|
|
|
if (src->sin_family != AF_INET || dst->sin_family != AF_INET) |
|
goto bad; |
|
|
|
src4 = &src->sin_addr; |
|
sport = &src->sin_port; |
|
dst4 = &dst->sin_addr; |
|
dport = &dst->sin_port; |
|
|
|
if (IN_MULTICAST(dst4->s_addr) || |
|
in_broadcast(*dst4, 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?) |
|
*/ |
|
|
|
/* |
|
* KAME note: usually we drop udpiphdr from mbuf here. |
|
* we need udpiphdr for IPsec processing so we do that later. |
|
*/ |
|
/* |
|
* Locate pcb(s) for datagram. |
|
*/ |
|
for (inp = udbtable.inpt_queue.cqh_first; |
|
inp != (struct inpcb *)&udbtable.inpt_queue; |
|
inp = inp->inp_queue.cqe_next) { |
|
if (inp->inp_lport != *dport) |
|
continue; |
|
if (!in_nullhost(inp->inp_laddr)) { |
|
if (!in_hosteq(inp->inp_laddr, *dst4)) |
|
continue; |
|
} |
|
if (!in_nullhost(inp->inp_faddr)) { |
|
if (!in_hosteq(inp->inp_faddr, *src4) || |
|
inp->inp_fport != *sport) |
|
continue; |
|
} |
|
|
|
last = inp; |
|
udp4_sendup(m, off, (struct sockaddr *)src, |
|
inp->inp_socket); |
|
rcvcnt++; |
|
|
|
/* |
|
* 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 ((inp->inp_socket->so_options & |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
|
break; |
|
} |
|
|
|
#if 0 |
|
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; |
|
} |
|
#endif |
|
} else { |
|
/* |
|
* Locate pcb for datagram. |
|
*/ |
|
inp = in_pcblookup_connect(&udbtable, *src4, *sport, *dst4, *dport); |
|
if (inp == 0) { |
|
++udpstat.udps_pcbhashmiss; |
|
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
|
if (inp == 0) { |
|
#if 0 |
|
struct mbuf *n; |
|
|
|
if (m->m_flags & (M_BCAST | M_MCAST)) { |
|
udpstat.udps_noportbcast++; |
|
goto bad; |
|
} |
|
udpstat.udps_noport++; |
|
#ifdef IPKDB |
|
if (checkipkdb(src4, *sport, *dport, m, off, |
|
m->m_pkthdr.len - off)) { |
|
/* |
|
* It was a debugger connect packet, |
|
* just drop it now |
|
*/ |
|
goto bad; |
|
} |
|
#endif |
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
|
icmp_error(n, ICMP_UNREACH, |
|
ICMP_UNREACH_PORT, 0, 0); |
|
} |
|
#endif |
|
return rcvcnt; |
|
} |
|
} |
|
|
|
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
|
rcvcnt++; |
|
} |
|
|
struct inpcb *udp_last_inpcb = &udb; |
bad: |
|
return rcvcnt; |
|
} |
|
#endif |
|
|
/* |
#ifdef INET6 |
* UDP protocol implementation. |
static int |
* Per RFC 768, August, 1980. |
in6_mcmatch(in6p, ia6, ifp) |
*/ |
struct in6pcb *in6p; |
udp_init() |
struct in6_addr *ia6; |
|
struct ifnet *ifp; |
{ |
{ |
|
struct ip6_moptions *im6o = in6p->in6p_moptions; |
|
struct in6_multi_mship *imm; |
|
|
|
if (im6o == NULL) |
|
return 0; |
|
|
udb.inp_next = udb.inp_prev = &udb; |
for (imm = im6o->im6o_memberships.lh_first; imm != NULL; |
|
imm = imm->i6mm_chain.le_next) { |
|
if ((ifp == NULL || |
|
imm->i6mm_maddr->in6m_ifp == ifp) && |
|
IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, |
|
ia6)) |
|
return 1; |
|
} |
|
return 0; |
} |
} |
|
|
#ifndef COMPAT_42 |
static int |
int udpcksum = 1; |
udp6_realinput(af, src, dst, m, off) |
#else |
int af; /* af on packet */ |
int udpcksum = 0; /* XXX */ |
struct sockaddr_in6 *src; |
|
struct sockaddr_in6 *dst; |
|
struct mbuf *m; |
|
int off; /* offset of udphdr */ |
|
{ |
|
u_int16_t sport, dport; |
|
int rcvcnt; |
|
struct in6_addr src6, dst6; |
|
const struct in_addr *dst4; |
|
struct in6pcb *in6p; |
|
|
|
rcvcnt = 0; |
|
off += sizeof(struct udphdr); /* now, offset of payload */ |
|
|
|
if (af != AF_INET && af != AF_INET6) |
|
goto bad; |
|
if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) |
|
goto bad; |
|
|
|
in6_embedscope(&src6, src, NULL, NULL); |
|
sport = src->sin6_port; |
|
in6_embedscope(&dst6, dst, NULL, NULL); |
|
dport = dst->sin6_port; |
|
dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[12]; |
|
|
|
if (IN6_IS_ADDR_MULTICAST(&dst6) || |
|
(af == AF_INET && IN_MULTICAST(dst4->s_addr))) { |
|
struct in6pcb *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?) |
|
*/ |
|
|
|
/* |
|
* KAME note: usually we drop udpiphdr from mbuf here. |
|
* we need udpiphdr for IPsec processing so we do that later. |
|
*/ |
|
/* |
|
* Locate pcb(s) for datagram. |
|
*/ |
|
for (in6p = udb6.in6p_next; in6p != &udb6; |
|
in6p = in6p->in6p_next) { |
|
if (in6p->in6p_lport != dport) |
|
continue; |
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { |
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6) && |
|
!in6_mcmatch(in6p, &dst6, m->m_pkthdr.rcvif)) |
|
continue; |
|
} |
|
#ifndef INET6_BINDV6ONLY |
|
else { |
|
if (IN6_IS_ADDR_V4MAPPED(&dst6) && |
|
(in6p->in6p_flags & IN6P_BINDV6ONLY)) |
|
continue; |
|
} |
|
#endif |
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, |
|
&src6) || in6p->in6p_fport != sport) |
|
continue; |
|
} |
|
#ifndef INET6_BINDV6ONLY |
|
else { |
|
if (IN6_IS_ADDR_V4MAPPED(&src6) && |
|
(in6p->in6p_flags & IN6P_BINDV6ONLY)) |
|
continue; |
|
} |
#endif |
#endif |
int udp_ttl = UDP_TTL; |
|
|
|
struct sockaddr_in udp_in = { sizeof(udp_in), AF_INET }; |
last = in6p; |
|
udp6_sendup(m, off, (struct sockaddr *)src, |
|
in6p->in6p_socket); |
|
rcvcnt++; |
|
|
udp_input(m, iphlen) |
/* |
register struct mbuf *m; |
* Don't look for additional matches if this one does |
int iphlen; |
* 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 ((in6p->in6p_socket->so_options & |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
|
break; |
|
} |
|
|
|
#if 0 |
|
if (last == NULL) { |
|
/* |
|
* No matching pcb found; discard datagram. |
|
* (No need to send an ICMP Port Unreachable |
|
* for a broadcast or multicast datgram.) |
|
*/ |
|
switch (af) { |
|
case AF_INET: |
|
udpstat.udps_noportbcast++; |
|
break; |
|
case AF_INET6: |
|
udp6stat.udp6s_noportmcast++; |
|
break; |
|
} |
|
goto bad; |
|
} |
|
#endif |
|
} else { |
|
/* |
|
* Locate pcb for datagram. |
|
*/ |
|
in6p = in6_pcblookup_connect(&udb6, &src6, sport, |
|
&dst6, dport, 0); |
|
if (in6p == 0) { |
|
++udpstat.udps_pcbhashmiss; |
|
in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0); |
|
if (in6p == 0) { |
|
#if 0 |
|
struct mbuf *n; |
|
n = m_copy(m, 0, M_COPYALL); |
|
switch (af) { |
|
case AF_INET: |
|
if (m->m_flags & (M_BCAST | M_MCAST)) { |
|
udpstat.udps_noportbcast++; |
|
goto bad; |
|
} |
|
udpstat.udps_noport++; |
|
if (n != NULL) |
|
icmp_error(n, ICMP_UNREACH, |
|
ICMP_UNREACH_PORT, 0, 0); |
|
break; |
|
case AF_INET6: |
|
if (m->m_flags & M_MCAST) { |
|
udp6stat.udp6s_noportmcast++; |
|
goto bad; |
|
} |
|
udp6stat.udp6s_noport++; |
|
if (n != NULL) |
|
icmp6_error(n, ICMP6_DST_UNREACH, |
|
ICMP6_DST_UNREACH_NOPORT, 0); |
|
break; |
|
} |
|
#endif |
|
|
|
return rcvcnt; |
|
} |
|
} |
|
|
|
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
|
rcvcnt++; |
|
} |
|
|
|
bad: |
|
return rcvcnt; |
|
} |
|
#endif |
|
|
|
#else /*UDP6*/ |
|
|
|
void |
|
#if __STDC__ |
|
udp_input(struct mbuf *m, ...) |
|
#else |
|
udp_input(m, va_alist) |
|
struct mbuf *m; |
|
va_dcl |
|
#endif |
{ |
{ |
register struct ip *ip; |
int proto; |
register struct udphdr *uh; |
struct ip *ip; |
register struct inpcb *inp; |
struct udphdr *uh; |
|
struct inpcb *inp; |
struct mbuf *opts = 0; |
struct mbuf *opts = 0; |
int len; |
int len; |
struct ip save_ip; |
struct ip save_ip; |
|
int iphlen; |
|
va_list ap; |
|
struct sockaddr_in udpsrc; |
|
struct sockaddr *sa; |
|
|
|
va_start(ap, m); |
|
iphlen = va_arg(ap, int); |
|
proto = va_arg(ap, int); |
|
va_end(ap); |
|
|
udpstat.udps_ipackets++; |
udpstat.udps_ipackets++; |
|
|
Line 112 udp_input(m, iphlen) |
|
Line 973 udp_input(m, iphlen) |
|
} |
} |
uh = (struct udphdr *)((caddr_t)ip + iphlen); |
uh = (struct udphdr *)((caddr_t)ip + iphlen); |
|
|
|
/* destination port of 0 is illegal, based on RFC768. */ |
|
if (uh->uh_dport == 0) |
|
goto bad; |
|
|
/* |
/* |
* Make mbuf data length reflect UDP length. |
* Make mbuf data length reflect UDP length. |
* If not enough data to reflect UDP length, drop. |
* If not enough data to reflect UDP length, drop. |
*/ |
*/ |
len = ntohs((u_short)uh->uh_ulen); |
len = ntohs((u_int16_t)uh->uh_ulen); |
if (ip->ip_len != len) { |
if (ip->ip_len != iphlen + len) { |
if (len > ip->ip_len) { |
if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
udpstat.udps_badlen++; |
udpstat.udps_badlen++; |
goto bad; |
goto bad; |
} |
} |
m_adj(m, len - ip->ip_len); |
m_adj(m, iphlen + len - ip->ip_len); |
/* ip->ip_len = len; */ |
|
} |
} |
/* |
/* |
* Save a copy of the IP header in case we want restore it |
* Save a copy of the IP header in case we want restore it |
Line 134 udp_input(m, iphlen) |
|
Line 998 udp_input(m, iphlen) |
|
/* |
/* |
* Checksum extended UDP header and data. |
* Checksum extended UDP header and data. |
*/ |
*/ |
if (udpcksum && uh->uh_sum) { |
if (uh->uh_sum) { |
((struct ipovly *)ip)->ih_next = 0; |
switch (m->m_pkthdr.csum_flags & |
((struct ipovly *)ip)->ih_prev = 0; |
((m->m_pkthdr.rcvif->if_csum_flags & M_CSUM_UDPv4) | |
((struct ipovly *)ip)->ih_x1 = 0; |
M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: |
if (uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) { |
UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad); |
udpstat.udps_badsum++; |
goto badcsum; |
m_freem(m); |
|
return; |
case M_CSUM_UDPv4|M_CSUM_DATA: |
|
UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data); |
|
if ((m->m_pkthdr.csum_data ^ 0xffff) != 0) |
|
goto badcsum; |
|
break; |
|
|
|
case M_CSUM_UDPv4: |
|
/* Checksum was okay. */ |
|
UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok); |
|
break; |
|
|
|
default: |
|
/* Need to compute it ourselves. */ |
|
UDP_CSUM_COUNTER_INCR(&udp_swcsum); |
|
bzero(((struct ipovly *)ip)->ih_x1, |
|
sizeof ((struct ipovly *)ip)->ih_x1); |
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
|
if (in_cksum(m, len + sizeof (struct ip)) != 0) |
|
goto badcsum; |
|
break; |
} |
} |
} |
} |
#ifdef MULTICAST |
|
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) || |
/* |
in_broadcast(ip->ip_dst)) { |
* Construct sockaddr format source address. |
struct socket *last; |
*/ |
|
udpsrc.sin_family = AF_INET; |
|
udpsrc.sin_len = sizeof(struct sockaddr_in); |
|
udpsrc.sin_addr = ip->ip_src; |
|
udpsrc.sin_port = uh->uh_sport; |
|
bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); |
|
|
|
if (IN_MULTICAST(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 |
* Deliver a multicast or broadcast datagram to *all* sockets |
* for which the local and remote addresses and ports match |
* for which the local and remote addresses and ports match |
Line 162 udp_input(m, iphlen) |
|
Line 1054 udp_input(m, iphlen) |
|
* Those applications open the multiple sockets to overcome an |
* Those applications open the multiple sockets to overcome an |
* inadequacy of the UDP socket interface, but for backwards |
* inadequacy of the UDP socket interface, but for backwards |
* compatibility we avoid the problem here rather than |
* compatibility we avoid the problem here rather than |
* fixing the interface. Maybe 4.4BSD will remedy this?) |
* fixing the interface. Maybe 4.5BSD will remedy this?) |
*/ |
*/ |
|
|
|
iphlen += sizeof(struct udphdr); |
/* |
/* |
* Construct sockaddr format source address. |
* KAME note: usually we drop udpiphdr from mbuf here. |
|
* we need udpiphdr for IPsec processing so we do that later. |
*/ |
*/ |
udp_in.sin_port = uh->uh_sport; |
|
udp_in.sin_addr = ip->ip_src; |
|
m->m_len -= sizeof (struct udpiphdr); |
|
m->m_data += sizeof (struct udpiphdr); |
|
/* |
/* |
* Locate pcb(s) for datagram. |
* Locate pcb(s) for datagram. |
* (Algorithm copied from raw_intr().) |
* (Algorithm copied from raw_intr().) |
*/ |
*/ |
last = NULL; |
last = NULL; |
for (inp = udb.inp_next; inp != &udb; inp = inp->inp_next) { |
for (inp = udbtable.inpt_queue.cqh_first; |
|
inp != (struct inpcb *)&udbtable.inpt_queue; |
|
inp = inp->inp_queue.cqe_next) { |
if (inp->inp_lport != uh->uh_dport) |
if (inp->inp_lport != uh->uh_dport) |
continue; |
continue; |
if (inp->inp_laddr.s_addr != INADDR_ANY) { |
if (!in_nullhost(inp->inp_laddr)) { |
if (inp->inp_laddr.s_addr != |
if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) |
ip->ip_dst.s_addr) |
|
continue; |
continue; |
} |
} |
if (inp->inp_faddr.s_addr != INADDR_ANY) { |
if (!in_nullhost(inp->inp_faddr)) { |
if (inp->inp_faddr.s_addr != |
if (!in_hosteq(inp->inp_faddr, ip->ip_src) || |
ip->ip_src.s_addr || |
|
inp->inp_fport != uh->uh_sport) |
inp->inp_fport != uh->uh_sport) |
continue; |
continue; |
} |
} |
Line 194 udp_input(m, iphlen) |
|
Line 1085 udp_input(m, iphlen) |
|
if (last != NULL) { |
if (last != NULL) { |
struct mbuf *n; |
struct mbuf *n; |
|
|
|
#ifdef IPSEC |
|
/* check AH/ESP integrity. */ |
|
if (last != NULL && ipsec4_in_reject(m, last)) { |
|
ipsecstat.in_polvio++; |
|
/* do not inject data to pcb */ |
|
} else |
|
#endif /*IPSEC*/ |
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
if (sbappendaddr(&last->so_rcv, |
if (last->inp_flags & INP_CONTROLOPTS |
(struct sockaddr *)&udp_in, |
|| last->inp_socket->so_options & |
n, (struct mbuf *)0) == 0) |
SO_TIMESTAMP) { |
|
ip_savecontrol(last, &opts, |
|
ip, n); |
|
} |
|
m_adj(n, iphlen); |
|
sa = (struct sockaddr *)&udpsrc; |
|
if (sbappendaddr( |
|
&last->inp_socket->so_rcv, |
|
sa, n, opts) == 0) { |
m_freem(n); |
m_freem(n); |
else |
if (opts) |
sorwakeup(last); |
m_freem(opts); |
|
} else |
|
sorwakeup(last->inp_socket); |
|
opts = 0; |
} |
} |
} |
} |
last = inp->inp_socket; |
last = inp; |
/* |
/* |
* Don't look for additional matches if this one |
* Don't look for additional matches if this one does |
* does not have the SO_REUSEADDR socket option set. |
* not have either the SO_REUSEPORT or SO_REUSEADDR |
* This heuristic avoids searching through all pcbs |
* socket options set. This heuristic avoids searching |
* in the common case of a non-shared port. It |
* through all pcbs in the common case of a non-shared |
* assumes that an application will never clear |
* port. It * assumes that an application will never |
* the SO_REUSEADDR option after setting it. |
* clear these options after setting them. |
*/ |
*/ |
if ((last->so_options & SO_REUSEADDR) == 0) |
if ((last->inp_socket->so_options & |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
break; |
break; |
} |
} |
|
|
Line 222 udp_input(m, iphlen) |
|
Line 1132 udp_input(m, iphlen) |
|
* (No need to send an ICMP Port Unreachable |
* (No need to send an ICMP Port Unreachable |
* for a broadcast or multicast datgram.) |
* for a broadcast or multicast datgram.) |
*/ |
*/ |
|
udpstat.udps_noportbcast++; |
|
goto bad; |
|
} |
|
#ifdef IPSEC |
|
/* check AH/ESP integrity. */ |
|
if (last != NULL && ipsec4_in_reject(m, last)) { |
|
ipsecstat.in_polvio++; |
goto bad; |
goto bad; |
} |
} |
if (sbappendaddr(&last->so_rcv, (struct sockaddr *)&udp_in, |
#endif /*IPSEC*/ |
m, (struct mbuf *)0) == 0) |
if (last->inp_flags & INP_CONTROLOPTS || |
|
last->inp_socket->so_options & SO_TIMESTAMP) |
|
ip_savecontrol(last, &opts, ip, m); |
|
m->m_len -= iphlen; |
|
m->m_pkthdr.len -= iphlen; |
|
m->m_data += iphlen; |
|
sa = (struct sockaddr *)&udpsrc; |
|
if (sbappendaddr(&last->inp_socket->so_rcv, sa, m, opts) == 0) { |
|
udpstat.udps_fullsock++; |
goto bad; |
goto bad; |
sorwakeup(last); |
} |
|
sorwakeup(last->inp_socket); |
return; |
return; |
} |
} |
#endif |
|
/* |
/* |
* Locate pcb for datagram. |
* Locate pcb for datagram. |
*/ |
*/ |
inp = udp_last_inpcb; |
inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, |
if (inp->inp_lport != uh->uh_dport || |
ip->ip_dst, uh->uh_dport); |
inp->inp_fport != uh->uh_sport || |
|
inp->inp_faddr.s_addr != ip->ip_src.s_addr || |
|
inp->inp_laddr.s_addr != ip->ip_dst.s_addr) { |
|
inp = in_pcblookup(&udb, ip->ip_src, uh->uh_sport, |
|
ip->ip_dst, uh->uh_dport, INPLOOKUP_WILDCARD); |
|
if (inp) |
|
udp_last_inpcb = inp; |
|
udpstat.udpps_pcbcachemiss++; |
|
} |
|
if (inp == 0) { |
if (inp == 0) { |
/* don't send ICMP response for broadcast packet */ |
++udpstat.udps_pcbhashmiss; |
udpstat.udps_noport++; |
inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); |
#ifndef MULTICAST |
if (inp == 0) { |
/* XXX why don't we do this with MULTICAST? */ |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
if (m->m_flags & (M_BCAST | M_MCAST)) { |
udpstat.udps_noportbcast++; |
udpstat.udps_noportbcast++; |
goto bad; |
goto bad; |
} |
} |
udpstat.udps_noport++; |
|
*ip = save_ip; |
|
#ifdef IPKDB |
|
if (checkipkdb(&ip->ip_src, |
|
uh->uh_sport, |
|
uh->uh_dport, |
|
m, |
|
iphlen + sizeof(struct udphdr), |
|
len - sizeof(struct udphdr))) |
|
/* It was a debugger connect packet, just drop it now */ |
|
goto bad; |
#endif |
#endif |
*ip = save_ip; |
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
ip->ip_len += iphlen; |
return; |
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT); |
} |
return; |
} |
|
#ifdef IPSEC |
|
if (inp != NULL && ipsec4_in_reject(m, inp)) { |
|
ipsecstat.in_polvio++; |
|
goto bad; |
} |
} |
|
#endif /*IPSEC*/ |
|
|
/* |
/* |
* Construct sockaddr format source address. |
|
* Stuff source address and datagram in user buffer. |
* Stuff source address and datagram in user buffer. |
*/ |
*/ |
udp_in.sin_port = uh->uh_sport; |
if (inp->inp_flags & INP_CONTROLOPTS || |
udp_in.sin_addr = ip->ip_src; |
inp->inp_socket->so_options & SO_TIMESTAMP) |
if (inp->inp_flags & INP_CONTROLOPTS) { |
ip_savecontrol(inp, &opts, ip, m); |
struct mbuf **mp = &opts; |
|
struct mbuf *udp_saveopt(); |
|
|
|
if (inp->inp_flags & INP_RECVDSTADDR) { |
|
*mp = udp_saveopt((caddr_t) &ip->ip_dst, |
|
sizeof(struct in_addr), IP_RECVDSTADDR); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
#ifdef notyet |
|
/* options were tossed above */ |
|
if (inp->inp_flags & INP_RECVOPTS) { |
|
*mp = udp_saveopt((caddr_t) opts_deleted_above, |
|
sizeof(struct in_addr), IP_RECVOPTS); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
/* ip_srcroute doesn't do what we want here, need to fix */ |
|
if (inp->inp_flags & INP_RECVRETOPTS) { |
|
*mp = udp_saveopt((caddr_t) ip_srcroute(), |
|
sizeof(struct in_addr), IP_RECVRETOPTS); |
|
if (*mp) |
|
mp = &(*mp)->m_next; |
|
} |
|
#endif |
|
} |
|
iphlen += sizeof(struct udphdr); |
iphlen += sizeof(struct udphdr); |
m->m_len -= iphlen; |
m->m_len -= iphlen; |
m->m_pkthdr.len -= iphlen; |
m->m_pkthdr.len -= iphlen; |
m->m_data += iphlen; |
m->m_data += iphlen; |
if (sbappendaddr(&inp->inp_socket->so_rcv, (struct sockaddr *)&udp_in, |
sa = (struct sockaddr *)&udpsrc; |
m, opts) == 0) { |
if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { |
udpstat.udps_fullsock++; |
udpstat.udps_fullsock++; |
goto bad; |
goto bad; |
} |
} |
|
|
m_freem(m); |
m_freem(m); |
if (opts) |
if (opts) |
m_freem(opts); |
m_freem(opts); |
} |
return; |
|
|
/* |
|
* Create a "control" mbuf containing the specified data |
|
* with the specified type for presentation with a datagram. |
|
*/ |
|
struct mbuf * |
|
udp_saveopt(p, size, type) |
|
caddr_t p; |
|
register int size; |
|
int type; |
|
{ |
|
register struct cmsghdr *cp; |
|
struct mbuf *m; |
|
|
|
if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL) |
badcsum: |
return ((struct mbuf *) NULL); |
udpstat.udps_badsum++; |
cp = (struct cmsghdr *) mtod(m, struct cmsghdr *); |
m_freem(m); |
bcopy(p, (caddr_t)(cp + 1), size); |
|
size += sizeof(*cp); |
|
m->m_len = size; |
|
cp->cmsg_len = size; |
|
cp->cmsg_level = IPPROTO_IP; |
|
cp->cmsg_type = type; |
|
return (m); |
|
} |
} |
|
#endif /*UDP6*/ |
|
|
|
#ifdef INET |
/* |
/* |
* Notify a udp user of an asynchronous error; |
* Notify a udp user of an asynchronous error; |
* just wake up so that he can collect error status. |
* just wake up so that he can collect error status. |
*/ |
*/ |
|
static void |
udp_notify(inp, errno) |
udp_notify(inp, errno) |
register struct inpcb *inp; |
struct inpcb *inp; |
|
int errno; |
{ |
{ |
|
|
inp->inp_socket->so_error = errno; |
inp->inp_socket->so_error = errno; |
Line 349 udp_notify(inp, errno) |
|
Line 1237 udp_notify(inp, errno) |
|
sowwakeup(inp->inp_socket); |
sowwakeup(inp->inp_socket); |
} |
} |
|
|
udp_ctlinput(cmd, sa, ip) |
void * |
|
udp_ctlinput(cmd, sa, v) |
int cmd; |
int cmd; |
struct sockaddr *sa; |
struct sockaddr *sa; |
register struct ip *ip; |
void *v; |
{ |
{ |
register struct udphdr *uh; |
struct ip *ip = v; |
extern struct in_addr zeroin_addr; |
struct udphdr *uh; |
extern u_char inetctlerrmap[]; |
void (*notify) __P((struct inpcb *, int)) = udp_notify; |
|
int errno; |
if ((unsigned)cmd > PRC_NCMDS || inetctlerrmap[cmd] == 0) |
|
return; |
if (sa->sa_family != AF_INET |
|
|| sa->sa_len != sizeof(struct sockaddr_in)) |
|
return NULL; |
|
if ((unsigned)cmd >= PRC_NCMDS) |
|
return NULL; |
|
errno = inetctlerrmap[cmd]; |
|
if (PRC_IS_REDIRECT(cmd)) |
|
notify = in_rtchange, ip = 0; |
|
else if (cmd == PRC_HOSTDEAD) |
|
ip = 0; |
|
else if (errno == 0) |
|
return NULL; |
if (ip) { |
if (ip) { |
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
in_pcbnotify(&udb, sa, uh->uh_dport, ip->ip_src, uh->uh_sport, |
in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, |
cmd, udp_notify); |
ip->ip_src, uh->uh_sport, errno, notify); |
|
|
|
/* XXX mapped address case */ |
} else |
} else |
in_pcbnotify(&udb, sa, 0, zeroin_addr, 0, cmd, udp_notify); |
in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, |
|
notify); |
|
return NULL; |
} |
} |
|
|
udp_output(inp, m, addr, control) |
int |
register struct inpcb *inp; |
#if __STDC__ |
register struct mbuf *m; |
udp_output(struct mbuf *m, ...) |
struct mbuf *addr, *control; |
#else |
|
udp_output(m, va_alist) |
|
struct mbuf *m; |
|
va_dcl |
|
#endif |
{ |
{ |
register struct udpiphdr *ui; |
struct inpcb *inp; |
register int len = m->m_pkthdr.len; |
struct udpiphdr *ui; |
struct in_addr laddr; |
int len = m->m_pkthdr.len; |
int s, error = 0; |
int error = 0; |
|
va_list ap; |
|
|
if (control) |
va_start(ap, m); |
m_freem(control); /* XXX */ |
inp = va_arg(ap, struct inpcb *); |
|
va_end(ap); |
|
|
if (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); |
|
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 |
* Calculate data length and get a mbuf |
* for UDP and IP headers. |
* for UDP and IP headers. |
*/ |
*/ |
M_PREPEND(m, sizeof(struct udpiphdr), M_WAIT); |
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT); |
|
if (m == 0) { |
|
error = ENOBUFS; |
|
goto release; |
|
} |
|
|
|
/* |
|
* Compute the packet length of the IP header, and |
|
* punt if the length looks bogus. |
|
*/ |
|
if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { |
|
error = EMSGSIZE; |
|
goto release; |
|
} |
|
|
/* |
/* |
* Fill in mbuf with extended UDP header |
* Fill in mbuf with extended UDP header |
* and addresses and length put into network format. |
* and addresses and length put into network format. |
*/ |
*/ |
ui = mtod(m, struct udpiphdr *); |
ui = mtod(m, struct udpiphdr *); |
ui->ui_next = ui->ui_prev = 0; |
|
ui->ui_x1 = 0; |
|
ui->ui_pr = IPPROTO_UDP; |
ui->ui_pr = IPPROTO_UDP; |
ui->ui_len = htons((u_short)len + sizeof (struct udphdr)); |
|
ui->ui_src = inp->inp_laddr; |
ui->ui_src = inp->inp_laddr; |
ui->ui_dst = inp->inp_faddr; |
ui->ui_dst = inp->inp_faddr; |
ui->ui_sport = inp->inp_lport; |
ui->ui_sport = inp->inp_lport; |
ui->ui_dport = inp->inp_fport; |
ui->ui_dport = inp->inp_fport; |
ui->ui_ulen = ui->ui_len; |
ui->ui_ulen = htons((u_int16_t)len + sizeof(struct udphdr)); |
|
|
/* |
/* |
* Stuff checksum and output datagram. |
* Set up checksum and output datagram. |
*/ |
*/ |
ui->ui_sum = 0; |
|
if (udpcksum) { |
if (udpcksum) { |
if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) |
/* |
ui->ui_sum = 0xffff; |
* XXX Cache pseudo-header checksum part for |
} |
* XXX "connected" UDP sockets. |
|
*/ |
|
ui->ui_sum = in_cksum_phdr(ui->ui_src.s_addr, |
|
ui->ui_dst.s_addr, htons((u_int16_t)len + |
|
sizeof(struct udphdr) + IPPROTO_UDP)); |
|
m->m_pkthdr.csum_flags = M_CSUM_UDPv4; |
|
m->m_pkthdr.csum_data = offsetof(struct udphdr, uh_sum); |
|
} else |
|
ui->ui_sum = 0; |
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; |
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; |
((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ |
((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl; /* XXX */ |
((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ |
((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos; /* XXX */ |
udpstat.udps_opackets++; |
udpstat.udps_opackets++; |
error = ip_output(m, inp->inp_options, &inp->inp_route, |
|
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST) |
|
#ifdef MULTICAST |
|
| IP_MULTICASTOPTS, inp->inp_moptions |
|
#endif |
|
); |
|
|
|
if (addr) { |
#ifdef IPSEC |
in_pcbdisconnect(inp); |
if (ipsec_setsocket(m, inp->inp_socket) != 0) { |
inp->inp_laddr = laddr; |
error = ENOBUFS; |
splx(s); |
goto release; |
} |
} |
return (error); |
#endif /*IPSEC*/ |
|
|
|
return (ip_output(m, inp->inp_options, &inp->inp_route, |
|
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), |
|
inp->inp_moptions)); |
|
|
release: |
release: |
m_freem(m); |
m_freem(m); |
return (error); |
return (error); |
} |
} |
|
|
u_long udp_sendspace = 9216; /* really max datagram size */ |
int udp_sendspace = 9216; /* really max datagram size */ |
u_long udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in)); |
/* 40 1K datagrams */ |
/* 40 1K datagrams */ |
|
|
/*ARGSUSED*/ |
/*ARGSUSED*/ |
udp_usrreq(so, req, m, addr, control) |
int |
|
udp_usrreq(so, req, m, nam, control, p) |
struct socket *so; |
struct socket *so; |
int req; |
int req; |
struct mbuf *m, *addr, *control; |
struct mbuf *m, *nam, *control; |
|
struct proc *p; |
{ |
{ |
struct inpcb *inp = sotoinpcb(so); |
struct inpcb *inp; |
int error = 0; |
|
int s; |
int s; |
|
int error = 0; |
|
|
if (req == PRU_CONTROL) |
if (req == PRU_CONTROL) |
return (in_control(so, (int)m, (caddr_t)addr, |
return (in_control(so, (long)m, (caddr_t)nam, |
(struct ifnet *)control)); |
(struct ifnet *)control, p)); |
if (inp == NULL && req != PRU_ATTACH) { |
|
|
if (req == PRU_PURGEIF) { |
|
in_purgeif((struct ifnet *)control); |
|
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
|
return (0); |
|
} |
|
|
|
s = splsoftnet(); |
|
inp = sotoinpcb(so); |
|
#ifdef DIAGNOSTIC |
|
if (req != PRU_SEND && req != PRU_SENDOOB && control) |
|
panic("udp_usrreq: unexpected control mbuf"); |
|
#endif |
|
if (inp == 0 && req != PRU_ATTACH) { |
error = EINVAL; |
error = EINVAL; |
goto release; |
goto release; |
} |
} |
|
|
/* |
/* |
* Note: need to block udp_input while changing |
* Note: need to block udp_input while changing |
* the udp pcb queue and/or pcb addresses. |
* the udp pcb queue and/or pcb addresses. |
Line 482 udp_usrreq(so, req, m, addr, control) |
|
Line 1402 udp_usrreq(so, req, m, addr, control) |
|
switch (req) { |
switch (req) { |
|
|
case PRU_ATTACH: |
case PRU_ATTACH: |
if (inp != NULL) { |
if (inp != 0) { |
error = EINVAL; |
error = EISCONN; |
break; |
break; |
} |
} |
s = splnet(); |
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
error = in_pcballoc(so, &udb); |
error = soreserve(so, udp_sendspace, udp_recvspace); |
splx(s); |
if (error) |
|
break; |
|
} |
|
error = in_pcballoc(so, &udbtable); |
if (error) |
if (error) |
break; |
break; |
error = soreserve(so, udp_sendspace, udp_recvspace); |
inp = sotoinpcb(so); |
if (error) |
inp->inp_ip.ip_ttl = ip_defttl; |
|
#ifdef IPSEC |
|
error = ipsec_init_policy(so, &inp->inp_sp); |
|
if (error != 0) { |
|
in_pcbdetach(inp); |
break; |
break; |
((struct inpcb *) so->so_pcb)->inp_ip.ip_ttl = udp_ttl; |
} |
|
#endif /*IPSEC*/ |
break; |
break; |
|
|
case PRU_DETACH: |
case PRU_DETACH: |
udp_detach(inp); |
in_pcbdetach(inp); |
break; |
break; |
|
|
case PRU_BIND: |
case PRU_BIND: |
s = splnet(); |
error = in_pcbbind(inp, nam, p); |
error = in_pcbbind(inp, addr); |
|
splx(s); |
|
break; |
break; |
|
|
case PRU_LISTEN: |
case PRU_LISTEN: |
Line 512 udp_usrreq(so, req, m, addr, control) |
|
Line 1438 udp_usrreq(so, req, m, addr, control) |
|
break; |
break; |
|
|
case PRU_CONNECT: |
case PRU_CONNECT: |
if (inp->inp_faddr.s_addr != INADDR_ANY) { |
error = in_pcbconnect(inp, nam); |
error = EISCONN; |
if (error) |
break; |
break; |
} |
soisconnected(so); |
s = splnet(); |
|
error = in_pcbconnect(inp, addr); |
|
splx(s); |
|
if (error == 0) |
|
soisconnected(so); |
|
break; |
break; |
|
|
case PRU_CONNECT2: |
case PRU_CONNECT2: |
error = EOPNOTSUPP; |
error = EOPNOTSUPP; |
break; |
break; |
|
|
case PRU_ACCEPT: |
|
error = EOPNOTSUPP; |
|
break; |
|
|
|
case PRU_DISCONNECT: |
case PRU_DISCONNECT: |
if (inp->inp_faddr.s_addr == INADDR_ANY) { |
/*soisdisconnected(so);*/ |
error = ENOTCONN; |
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
break; |
|
} |
|
s = splnet(); |
|
in_pcbdisconnect(inp); |
in_pcbdisconnect(inp); |
inp->inp_laddr.s_addr = INADDR_ANY; |
inp->inp_laddr = zeroin_addr; /* XXX */ |
splx(s); |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
|
break; |
break; |
|
|
case PRU_SHUTDOWN: |
case PRU_SHUTDOWN: |
socantsendmore(so); |
socantsendmore(so); |
break; |
break; |
|
|
case PRU_SEND: |
case PRU_RCVD: |
return (udp_output(inp, m, addr, control)); |
error = EOPNOTSUPP; |
|
|
case PRU_ABORT: |
|
soisdisconnected(so); |
|
udp_detach(inp); |
|
break; |
break; |
|
|
case PRU_SOCKADDR: |
case PRU_SEND: |
in_setsockaddr(inp, addr); |
if (control && control->m_len) { |
break; |
m_freem(control); |
|
m_freem(m); |
|
error = EINVAL; |
|
break; |
|
} |
|
{ |
|
struct in_addr laddr; /* XXX */ |
|
|
case PRU_PEERADDR: |
if (nam) { |
in_setpeeraddr(inp, addr); |
laddr = inp->inp_laddr; /* XXX */ |
|
if ((so->so_state & SS_ISCONNECTED) != 0) { |
|
error = EISCONN; |
|
goto die; |
|
} |
|
error = in_pcbconnect(inp, nam); |
|
if (error) { |
|
die: |
|
m_freem(m); |
|
break; |
|
} |
|
} else { |
|
if ((so->so_state & SS_ISCONNECTED) == 0) { |
|
error = ENOTCONN; |
|
goto die; |
|
} |
|
} |
|
error = udp_output(m, inp); |
|
if (nam) { |
|
in_pcbdisconnect(inp); |
|
inp->inp_laddr = laddr; /* XXX */ |
|
in_pcbstate(inp, INP_BOUND); /* XXX */ |
|
} |
|
} |
break; |
break; |
|
|
case PRU_SENSE: |
case PRU_SENSE: |
/* |
/* |
* stat: don't bother with a blocksize. |
* stat: don't bother with a blocksize. |
*/ |
*/ |
|
splx(s); |
return (0); |
return (0); |
|
|
|
case PRU_RCVOOB: |
|
error = EOPNOTSUPP; |
|
break; |
|
|
case PRU_SENDOOB: |
case PRU_SENDOOB: |
case PRU_FASTTIMO: |
m_freem(control); |
case PRU_SLOWTIMO: |
m_freem(m); |
case PRU_PROTORCV: |
|
case PRU_PROTOSEND: |
|
error = EOPNOTSUPP; |
error = EOPNOTSUPP; |
break; |
break; |
|
|
case PRU_RCVD: |
case PRU_SOCKADDR: |
case PRU_RCVOOB: |
in_setsockaddr(inp, nam); |
return (EOPNOTSUPP); /* do not free mbuf's */ |
break; |
|
|
|
case PRU_PEERADDR: |
|
in_setpeeraddr(inp, nam); |
|
break; |
|
|
default: |
default: |
panic("udp_usrreq"); |
panic("udp_usrreq"); |
} |
} |
|
|
release: |
release: |
if (control) { |
splx(s); |
printf("udp control data unexpectedly retained\n"); |
|
m_freem(control); |
|
} |
|
if (m) |
|
m_freem(m); |
|
return (error); |
return (error); |
} |
} |
|
|
udp_detach(inp) |
/* |
struct inpcb *inp; |
* Sysctl for udp variables. |
|
*/ |
|
int |
|
udp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) |
|
int *name; |
|
u_int namelen; |
|
void *oldp; |
|
size_t *oldlenp; |
|
void *newp; |
|
size_t newlen; |
{ |
{ |
int s = splnet(); |
/* All sysctl names at this level are terminal. */ |
|
if (namelen != 1) |
if (inp == udp_last_inpcb) |
return (ENOTDIR); |
udp_last_inpcb = &udb; |
|
in_pcbdetach(inp); |
switch (name[0]) { |
splx(s); |
case UDPCTL_CHECKSUM: |
|
return (sysctl_int(oldp, oldlenp, newp, newlen, &udpcksum)); |
|
case UDPCTL_SENDSPACE: |
|
return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
&udp_sendspace)); |
|
case UDPCTL_RECVSPACE: |
|
return (sysctl_int(oldp, oldlenp, newp, newlen, |
|
&udp_recvspace)); |
|
default: |
|
return (ENOPROTOOPT); |
|
} |
|
/* NOTREACHED */ |
} |
} |
|
#endif |