version 1.66.4.6, 2004/04/12 04:58:25 |
version 1.85.2.1, 2001/11/12 21:19:29 |
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* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
*/ |
*/ |
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#include "opt_inet.h" |
#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
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#include "opt_inet_csum.h" |
#include "opt_ipkdb.h" |
#include "opt_ipkdb.h" |
|
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#include <sys/param.h> |
#include <sys/param.h> |
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#include <sys/systm.h> |
#include <sys/systm.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
#include <sys/domain.h> |
#include <sys/domain.h> |
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#include <vm/vm.h> |
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#include <sys/sysctl.h> |
#include <sys/sysctl.h> |
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#include <net/if.h> |
#include <net/if.h> |
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#ifdef IPSEC |
#ifdef IPSEC |
#include <netinet6/ipsec.h> |
#include <netinet6/ipsec.h> |
#include <netkey/key.h> |
#include <netkey/key.h> |
#include <netkey/key_debug.h> |
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#endif /*IPSEC*/ |
#endif /*IPSEC*/ |
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#ifdef IPKDB |
#ifdef IPKDB |
Line 137 int udpcksum = 1; |
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Line 136 int udpcksum = 1; |
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int udpcksum = 0; /* XXX */ |
int udpcksum = 0; /* XXX */ |
#endif |
#endif |
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|
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#ifdef INET |
static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, |
static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, |
struct socket *)); |
struct socket *)); |
static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, |
static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, |
struct mbuf *, int)); |
struct mbuf *, int)); |
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#endif |
#ifdef INET6 |
#ifdef INET6 |
static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, |
static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, |
struct socket *)); |
struct socket *)); |
static int in6_mcmatch __P((struct in6pcb *, struct in6_addr *, |
|
struct ifnet *)); |
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static int udp6_realinput __P((int, struct sockaddr_in6 *, |
static int udp6_realinput __P((int, struct sockaddr_in6 *, |
struct sockaddr_in6 *, struct mbuf *, int)); |
struct sockaddr_in6 *, struct mbuf *, int)); |
#endif |
#endif |
|
#ifdef INET |
static void udp_notify __P((struct inpcb *, int)); |
static void udp_notify __P((struct inpcb *, int)); |
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#endif |
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#ifndef UDBHASHSIZE |
#ifndef UDBHASHSIZE |
#define UDBHASHSIZE 128 |
#define UDBHASHSIZE 128 |
#endif |
#endif |
int udbhashsize = UDBHASHSIZE; |
int udbhashsize = UDBHASHSIZE; |
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#ifdef UDP_CSUM_COUNTERS |
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#include <sys/device.h> |
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struct evcnt udp_hwcsum_bad = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "hwcsum bad"); |
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struct evcnt udp_hwcsum_ok = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "hwcsum ok"); |
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struct evcnt udp_hwcsum_data = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "hwcsum data"); |
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struct evcnt udp_swcsum = EVCNT_INITIALIZER(EVCNT_TYPE_MISC, |
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NULL, "udp", "swcsum"); |
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#define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
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#else |
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#define UDP_CSUM_COUNTER_INCR(ev) /* nothing */ |
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#endif /* UDP_CSUM_COUNTERS */ |
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void |
void |
udp_init() |
udp_init() |
{ |
{ |
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#ifdef INET |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
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#endif |
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#ifdef UDP_CSUM_COUNTERS |
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evcnt_attach_static(&udp_hwcsum_bad); |
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evcnt_attach_static(&udp_hwcsum_ok); |
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evcnt_attach_static(&udp_hwcsum_data); |
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evcnt_attach_static(&udp_swcsum); |
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#endif /* UDP_CSUM_COUNTERS */ |
} |
} |
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#ifndef UDP6 |
#ifdef INET |
void |
void |
#if __STDC__ |
#if __STDC__ |
udp_input(struct mbuf *m, ...) |
udp_input(struct mbuf *m, ...) |
Line 248 udp_input(m, va_alist) |
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Line 278 udp_input(m, va_alist) |
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* Checksum extended UDP header and data. |
* Checksum extended UDP header and data. |
*/ |
*/ |
if (uh->uh_sum) { |
if (uh->uh_sum) { |
if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { |
switch (m->m_pkthdr.csum_flags & |
udpstat.udps_badsum++; |
((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) | |
m_freem(m); |
M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
return; |
case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: |
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UDP_CSUM_COUNTER_INCR(&udp_hwcsum_bad); |
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goto badcsum; |
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case M_CSUM_UDPv4|M_CSUM_DATA: |
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UDP_CSUM_COUNTER_INCR(&udp_hwcsum_data); |
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if ((m->m_pkthdr.csum_data ^ 0xffff) != 0) |
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goto badcsum; |
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break; |
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case M_CSUM_UDPv4: |
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/* Checksum was okay. */ |
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UDP_CSUM_COUNTER_INCR(&udp_hwcsum_ok); |
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break; |
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default: |
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/* Need to compute it ourselves. */ |
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UDP_CSUM_COUNTER_INCR(&udp_swcsum); |
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if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) |
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goto badcsum; |
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break; |
} |
} |
} |
} |
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Line 315 udp_input(m, va_alist) |
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Line 365 udp_input(m, va_alist) |
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bad: |
bad: |
if (m) |
if (m) |
m_freem(m); |
m_freem(m); |
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return; |
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badcsum: |
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m_freem(m); |
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udpstat.udps_badsum++; |
} |
} |
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#endif |
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#ifdef INET6 |
#ifdef INET6 |
int |
int |
Line 357 udp6_input(mp, offp, proto) |
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Line 413 udp6_input(mp, offp, proto) |
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} |
} |
#endif |
#endif |
ulen = ntohs((u_short)uh->uh_ulen); |
ulen = ntohs((u_short)uh->uh_ulen); |
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/* |
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* RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
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* iff payload length > 0xffff. |
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*/ |
if (ulen == 0 && plen > 0xffff) |
if (ulen == 0 && plen > 0xffff) |
ulen = plen; |
ulen = plen; |
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Line 379 udp6_input(mp, offp, proto) |
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Line 439 udp6_input(mp, offp, proto) |
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/* |
/* |
* Checksum extended UDP header and data. |
* Checksum extended UDP header and data. |
*/ |
*/ |
if (uh->uh_sum == 0) { |
if (uh->uh_sum == 0) |
udp6stat.udp6s_nosum++; |
udp6stat.udp6s_nosum++; |
goto bad; |
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { |
} |
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if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { |
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udp6stat.udp6s_badsum++; |
udp6stat.udp6s_badsum++; |
goto bad; |
goto bad; |
} |
} |
Line 395 udp6_input(mp, offp, proto) |
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Line 453 udp6_input(mp, offp, proto) |
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bzero(&src, sizeof(src)); |
bzero(&src, sizeof(src)); |
src.sin6_family = AF_INET6; |
src.sin6_family = AF_INET6; |
src.sin6_len = sizeof(struct sockaddr_in6); |
src.sin6_len = sizeof(struct sockaddr_in6); |
bcopy(&ip6->ip6_src, &src.sin6_addr, sizeof(src.sin6_addr)); |
/* KAME hack: recover scopeid */ |
if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) |
(void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif); |
src.sin6_addr.s6_addr16[1] = 0; |
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if (m->m_pkthdr.rcvif) { |
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if (IN6_IS_SCOPE_LINKLOCAL(&src.sin6_addr)) |
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src.sin6_scope_id = m->m_pkthdr.rcvif->if_index; |
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else |
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src.sin6_scope_id = 0; |
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} |
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src.sin6_port = uh->uh_sport; |
src.sin6_port = uh->uh_sport; |
bzero(&dst, sizeof(dst)); |
bzero(&dst, sizeof(dst)); |
dst.sin6_family = AF_INET6; |
dst.sin6_family = AF_INET6; |
dst.sin6_len = sizeof(struct sockaddr_in6); |
dst.sin6_len = sizeof(struct sockaddr_in6); |
bcopy(&ip6->ip6_dst, &dst.sin6_addr, sizeof(dst.sin6_addr)); |
/* KAME hack: recover scopeid */ |
if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) |
(void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif); |
dst.sin6_addr.s6_addr16[1] = 0; |
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if (m->m_pkthdr.rcvif) { |
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if (IN6_IS_SCOPE_LINKLOCAL(&dst.sin6_addr)) |
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dst.sin6_scope_id = m->m_pkthdr.rcvif->if_index; |
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else |
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dst.sin6_scope_id = 0; |
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} |
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dst.sin6_port = uh->uh_dport; |
dst.sin6_port = uh->uh_dport; |
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if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { |
if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { |
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} |
} |
#endif |
#endif |
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#ifdef INET |
static void |
static void |
udp4_sendup(m, off, src, so) |
udp4_sendup(m, off, src, so) |
struct mbuf *m; |
struct mbuf *m; |
Line 486 udp4_sendup(m, off, src, so) |
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Line 531 udp4_sendup(m, off, src, so) |
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m_freem(n); |
m_freem(n); |
if (opts) |
if (opts) |
m_freem(opts); |
m_freem(opts); |
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udpstat.udps_fullsock++; |
} else |
} else |
sorwakeup(so); |
sorwakeup(so); |
} |
} |
} |
} |
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#endif |
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#ifdef INET6 |
#ifdef INET6 |
static void |
static void |
Line 536 udp6_sendup(m, off, src, so) |
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Line 583 udp6_sendup(m, off, src, so) |
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} |
} |
#endif |
#endif |
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#ifdef INET |
static int |
static int |
udp4_realinput(src, dst, m, off) |
udp4_realinput(src, dst, m, off) |
struct sockaddr_in *src; |
struct sockaddr_in *src; |
Line 580 udp4_realinput(src, dst, m, off) |
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Line 628 udp4_realinput(src, dst, m, off) |
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|
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/* |
/* |
* KAME note: usually we drop udpiphdr from mbuf here. |
* KAME note: usually we drop udpiphdr from mbuf here. |
* we need udpiphdr for iPsec processing so we do that later. |
* we need udpiphdr for IPsec processing so we do that later. |
*/ |
*/ |
/* |
/* |
* Locate pcb(s) for datagram. |
* Locate pcb(s) for datagram. |
*/ |
*/ |
for (inp = udbtable.inpt_queue.cqh_first; |
CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) { |
inp != (struct inpcb *)&udbtable.inpt_queue; |
|
inp = inp->inp_queue.cqe_next) { |
|
if (inp->inp_lport != *dport) |
if (inp->inp_lport != *dport) |
continue; |
continue; |
if (!in_nullhost(inp->inp_laddr)) { |
if (!in_nullhost(inp->inp_laddr)) { |
Line 617 udp4_realinput(src, dst, m, off) |
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Line 663 udp4_realinput(src, dst, m, off) |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
break; |
break; |
} |
} |
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#if 0 |
|
if (last == NULL) { |
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/* |
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* No matching pcb found; discard datagram. |
|
* (No need to send an ICMP Port Unreachable |
|
* for a broadcast or multicast datgram.) |
|
*/ |
|
udpstat.udps_noportbcast++; |
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goto bad; |
|
} |
|
#endif |
|
} else { |
} else { |
/* |
/* |
* Locate pcb for datagram. |
* Locate pcb for datagram. |
Line 637 udp4_realinput(src, dst, m, off) |
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Line 671 udp4_realinput(src, dst, m, off) |
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if (inp == 0) { |
if (inp == 0) { |
++udpstat.udps_pcbhashmiss; |
++udpstat.udps_pcbhashmiss; |
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
inp = in_pcblookup_bind(&udbtable, *dst4, *dport); |
if (inp == 0) { |
if (inp == 0) |
#if 0 |
|
struct mbuf *n; |
|
|
|
if (m->m_flags & (M_BCAST | M_MCAST)) { |
|
udpstat.udps_noportbcast++; |
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goto bad; |
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} |
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udpstat.udps_noport++; |
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#ifdef IPKDB |
|
if (checkipkdb(src4, *sport, *dport, m, off, |
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m->m_pkthdr.len - off)) { |
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/* |
|
* It was a debugger connect packet, |
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* just drop it now |
|
*/ |
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goto bad; |
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} |
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#endif |
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if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
|
icmp_error(n, ICMP_UNREACH, |
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ICMP_UNREACH_PORT, 0, 0); |
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} |
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#endif |
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return rcvcnt; |
return rcvcnt; |
} |
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} |
} |
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udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
Line 672 udp4_realinput(src, dst, m, off) |
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Line 682 udp4_realinput(src, dst, m, off) |
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bad: |
bad: |
return rcvcnt; |
return rcvcnt; |
} |
} |
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#endif |
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#ifdef INET6 |
#ifdef INET6 |
static int |
static int |
in6_mcmatch(in6p, ia6, ifp) |
|
struct in6pcb *in6p; |
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struct in6_addr *ia6; |
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struct ifnet *ifp; |
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{ |
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struct ip6_moptions *im6o = in6p->in6p_moptions; |
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struct in6_multi_mship *imm; |
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|
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if (im6o == NULL) |
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return 0; |
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for (imm = im6o->im6o_memberships.lh_first; imm != NULL; |
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imm = imm->i6mm_chain.le_next) { |
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if ((ifp == NULL || |
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imm->i6mm_maddr->in6m_ifp == ifp) && |
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IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr, |
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ia6)) |
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return 1; |
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} |
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return 0; |
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} |
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static int |
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udp6_realinput(af, src, dst, m, off) |
udp6_realinput(af, src, dst, m, off) |
int af; /* af on packet */ |
int af; /* af on packet */ |
struct sockaddr_in6 *src; |
struct sockaddr_in6 *src; |
Line 705 udp6_realinput(af, src, dst, m, off) |
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Line 693 udp6_realinput(af, src, dst, m, off) |
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struct mbuf *m; |
struct mbuf *m; |
int off; /* offset of udphdr */ |
int off; /* offset of udphdr */ |
{ |
{ |
u_int16_t *sport, *dport; |
u_int16_t sport, dport; |
int rcvcnt; |
int rcvcnt; |
struct in6_addr *src6, *dst6; |
struct in6_addr src6, dst6; |
struct in_addr *dst4; |
const struct in_addr *dst4; |
struct in6pcb *in6p; |
struct in6pcb *in6p; |
|
|
rcvcnt = 0; |
rcvcnt = 0; |
Line 719 udp6_realinput(af, src, dst, m, off) |
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Line 707 udp6_realinput(af, src, dst, m, off) |
|
if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) |
if (src->sin6_family != AF_INET6 || dst->sin6_family != AF_INET6) |
goto bad; |
goto bad; |
|
|
src6 = &src->sin6_addr; |
in6_embedscope(&src6, src, NULL, NULL); |
sport = &src->sin6_port; |
sport = src->sin6_port; |
dst6 = &dst->sin6_addr; |
in6_embedscope(&dst6, dst, NULL, NULL); |
dport = &dst->sin6_port; |
dport = dst->sin6_port; |
dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[12]; |
dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12]; |
|
|
if (IN6_IS_ADDR_MULTICAST(dst6) |
if (IN6_IS_ADDR_MULTICAST(&dst6) || |
|| (af == AF_INET && IN_MULTICAST(dst4->s_addr))) { |
(af == AF_INET && IN_MULTICAST(dst4->s_addr))) { |
struct in6pcb *last; |
struct in6pcb *last; |
/* |
/* |
* Deliver a multicast or broadcast datagram to *all* sockets |
* Deliver a multicast or broadcast datagram to *all* sockets |
Line 746 udp6_realinput(af, src, dst, m, off) |
|
Line 734 udp6_realinput(af, src, dst, m, off) |
|
|
|
/* |
/* |
* KAME note: usually we drop udpiphdr from mbuf here. |
* KAME note: usually we drop udpiphdr from mbuf here. |
* we need udpiphdr for iPsec processing so we do that later. |
* we need udpiphdr for IPsec processing so we do that later. |
*/ |
*/ |
/* |
/* |
* Locate pcb(s) for datagram. |
* Locate pcb(s) for datagram. |
*/ |
*/ |
for (in6p = udb6.in6p_next; in6p != &udb6; |
for (in6p = udb6.in6p_next; in6p != &udb6; |
in6p = in6p->in6p_next) { |
in6p = in6p->in6p_next) { |
if (in6p->in6p_lport != *dport) |
if (in6p->in6p_lport != dport) |
continue; |
continue; |
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { |
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, dst6) |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, &dst6)) |
&& !in6_mcmatch(in6p, dst6, m->m_pkthdr.rcvif)) |
|
continue; |
continue; |
} |
} |
#ifndef INET6_BINDV6ONLY |
|
else { |
else { |
if (IN6_IS_ADDR_V4MAPPED(dst6) |
if (IN6_IS_ADDR_V4MAPPED(&dst6) && |
&& (in6p->in6p_flags & IN6P_BINDV6ONLY)) |
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
continue; |
continue; |
} |
} |
#endif |
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, |
|| in6p->in6p_fport != *sport) |
&src6) || in6p->in6p_fport != sport) |
continue; |
continue; |
} |
} |
#ifndef INET6_BINDV6ONLY |
|
else { |
else { |
if (IN6_IS_ADDR_V4MAPPED(src6) |
if (IN6_IS_ADDR_V4MAPPED(&src6) && |
&& (in6p->in6p_flags & IN6P_BINDV6ONLY)) |
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
continue; |
continue; |
} |
} |
#endif |
|
|
|
last = in6p; |
last = in6p; |
udp6_sendup(m, off, (struct sockaddr *)src, |
udp6_sendup(m, off, (struct sockaddr *)src, |
Line 797 udp6_realinput(af, src, dst, m, off) |
|
Line 780 udp6_realinput(af, src, dst, m, off) |
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
break; |
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 { |
} else { |
/* |
/* |
* Locate pcb for datagram. |
* Locate pcb for datagram. |
*/ |
*/ |
in6p = in6_pcblookup_connect(&udb6, src6, *sport, |
in6p = in6_pcblookup_connect(&udb6, &src6, sport, |
dst6, *dport, 0); |
&dst6, dport, 0); |
if (in6p == 0) { |
if (in6p == 0) { |
++udpstat.udps_pcbhashmiss; |
++udpstat.udps_pcbhashmiss; |
in6p = in6_pcblookup_bind(&udb6, dst6, *dport, 0); |
in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0); |
if (in6p == 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; |
return rcvcnt; |
} |
|
} |
} |
|
|
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
|
|
} |
} |
#endif |
#endif |
|
|
#else /*UDP6*/ |
#ifdef INET |
|
|
void |
|
#if __STDC__ |
|
udp_input(struct mbuf *m, ...) |
|
#else |
|
udp_input(m, va_alist) |
|
struct mbuf *m; |
|
va_dcl |
|
#endif |
|
{ |
|
int proto; |
|
struct ip *ip; |
|
struct udphdr *uh; |
|
struct inpcb *inp; |
|
struct mbuf *opts = 0; |
|
int len; |
|
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++; |
|
|
|
/* |
|
* 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); |
|
|
|
/* 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); |
|
} |
|
/* |
|
* 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, |
|
sizeof ((struct ipovly *)ip)->ih_x1); |
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
|
if (in_cksum(m, len + sizeof (struct ip)) != 0) { |
|
udpstat.udps_badsum++; |
|
m_freem(m); |
|
return; |
|
} |
|
} |
|
|
|
/* |
|
* Construct sockaddr format source address. |
|
*/ |
|
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 |
|
* 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?) |
|
*/ |
|
|
|
iphlen += sizeof(struct udphdr); |
|
/* |
|
* 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. |
|
* (Algorithm copied from raw_intr().) |
|
*/ |
|
last = NULL; |
|
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) |
|
continue; |
|
if (!in_nullhost(inp->inp_laddr)) { |
|
if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) |
|
continue; |
|
} |
|
if (!in_nullhost(inp->inp_faddr)) { |
|
if (!in_hosteq(inp->inp_faddr, ip->ip_src) || |
|
inp->inp_fport != uh->uh_sport) |
|
continue; |
|
} |
|
|
|
if (last != NULL) { |
|
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 (last->inp_flags & INP_CONTROLOPTS |
|
|| last->inp_socket->so_options & |
|
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); |
|
if (opts) |
|
m_freem(opts); |
|
} else |
|
sorwakeup(last->inp_socket); |
|
opts = 0; |
|
} |
|
} |
|
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 (last != NULL && ipsec4_in_reject(m, last)) { |
|
ipsecstat.in_polvio++; |
|
goto bad; |
|
} |
|
#endif /*IPSEC*/ |
|
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; |
|
} |
|
sorwakeup(last->inp_socket); |
|
return; |
|
} |
|
/* |
|
* Locate pcb for datagram. |
|
*/ |
|
inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, |
|
ip->ip_dst, uh->uh_dport); |
|
if (inp == 0) { |
|
++udpstat.udps_pcbhashmiss; |
|
inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); |
|
if (inp == 0) { |
|
if (m->m_flags & (M_BCAST | M_MCAST)) { |
|
udpstat.udps_noportbcast++; |
|
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 |
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
|
return; |
|
} |
|
} |
|
#ifdef IPSEC |
|
if (inp != NULL && ipsec4_in_reject(m, inp)) { |
|
ipsecstat.in_polvio++; |
|
goto bad; |
|
} |
|
#endif /*IPSEC*/ |
|
|
|
/* |
|
* Stuff source address and datagram in user buffer. |
|
*/ |
|
if (inp->inp_flags & INP_CONTROLOPTS || |
|
inp->inp_socket->so_options & SO_TIMESTAMP) |
|
ip_savecontrol(inp, &opts, ip, m); |
|
iphlen += sizeof(struct udphdr); |
|
m->m_len -= iphlen; |
|
m->m_pkthdr.len -= iphlen; |
|
m->m_data += iphlen; |
|
sa = (struct sockaddr *)&udpsrc; |
|
if (sbappendaddr(&inp->inp_socket->so_rcv, sa, m, opts) == 0) { |
|
udpstat.udps_fullsock++; |
|
goto bad; |
|
} |
|
sorwakeup(inp->inp_socket); |
|
return; |
|
bad: |
|
m_freem(m); |
|
if (opts) |
|
m_freem(opts); |
|
} |
|
#endif /*UDP6*/ |
|
|
|
/* |
/* |
* 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. |
Line 1236 udp_output(m, va_alist) |
|
Line 896 udp_output(m, va_alist) |
|
* 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 *); |
bzero(ui->ui_x1, sizeof ui->ui_x1); |
|
ui->ui_pr = IPPROTO_UDP; |
ui->ui_pr = IPPROTO_UDP; |
ui->ui_len = htons((u_int16_t)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 */ |
Line 1295 udp_usrreq(so, req, m, nam, control, p) |
|
Line 960 udp_usrreq(so, req, m, nam, control, p) |
|
(struct ifnet *)control, p)); |
(struct ifnet *)control, p)); |
|
|
if (req == PRU_PURGEIF) { |
if (req == PRU_PURGEIF) { |
|
in_pcbpurgeif0(&udbtable, (struct ifnet *)control); |
in_purgeif((struct ifnet *)control); |
in_purgeif((struct ifnet *)control); |
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
return (0); |
return (0); |
Line 1332 udp_usrreq(so, req, m, nam, control, p) |
|
Line 998 udp_usrreq(so, req, m, nam, control, p) |
|
break; |
break; |
inp = sotoinpcb(so); |
inp = sotoinpcb(so); |
inp->inp_ip.ip_ttl = ip_defttl; |
inp->inp_ip.ip_ttl = ip_defttl; |
#ifdef IPSEC |
|
error = ipsec_init_policy(so, &inp->inp_sp); |
|
if (error != 0) { |
|
in_pcbdetach(inp); |
|
break; |
|
} |
|
#endif /*IPSEC*/ |
|
break; |
break; |
|
|
case PRU_DETACH: |
case PRU_DETACH: |
Line 1481 udp_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1140 udp_sysctl(name, namelen, oldp, oldlenp, |
|
} |
} |
/* NOTREACHED */ |
/* NOTREACHED */ |
} |
} |
|
#endif |