| version 1.75.2.9, 2002/08/27 23:48:07 |
version 1.76, 2001/05/08 10:15:14 |
|
|
| /* |
/* |
| * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
* 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 |
* 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 |
| * are met: |
* are met: |
|
|
| * 3. Neither the name of the project nor the names of its contributors |
* 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 |
* may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
* without specific prior written permission. |
| * |
* |
| * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
|
|
| * @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
| */ |
*/ |
| |
|
| #include <sys/cdefs.h> |
|
| __KERNEL_RCSID(0, "$NetBSD$"); |
|
| |
|
| #include "opt_inet.h" |
|
| #include "opt_ipsec.h" |
#include "opt_ipsec.h" |
| #include "opt_inet_csum.h" |
|
| #include "opt_ipkdb.h" |
#include "opt_ipkdb.h" |
| |
|
| #include <sys/param.h> |
#include <sys/param.h> |
| Line 83 __KERNEL_RCSID(0, "$NetBSD$"); |
|
| Line 78 __KERNEL_RCSID(0, "$NetBSD$"); |
|
| #include <sys/systm.h> |
#include <sys/systm.h> |
| #include <sys/proc.h> |
#include <sys/proc.h> |
| #include <sys/domain.h> |
#include <sys/domain.h> |
| |
|
| |
#include <uvm/uvm_extern.h> |
| #include <sys/sysctl.h> |
#include <sys/sysctl.h> |
| |
|
| #include <net/if.h> |
#include <net/if.h> |
| Line 139 int udpcksum = 1; |
|
| Line 136 int udpcksum = 1; |
|
| int udpcksum = 0; /* XXX */ |
int udpcksum = 0; /* XXX */ |
| #endif |
#endif |
| |
|
| struct inpcbtable udbtable; |
|
| struct udpstat udpstat; |
|
| |
|
| #ifdef INET |
#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 *)); |
| Line 151 static int udp4_realinput __P((struct so |
|
| Line 145 static int udp4_realinput __P((struct so |
|
| #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 *)); |
| 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 |
| Line 163 static void udp_notify __P((struct inpcb |
|
| Line 159 static void udp_notify __P((struct inpcb |
|
| #endif |
#endif |
| int udbhashsize = UDBHASHSIZE; |
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 |
void |
| udp_init() |
udp_init() |
| { |
{ |
|
|
| #ifdef INET |
#ifdef INET |
| in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
in_pcbinit(&udbtable, udbhashsize, udbhashsize); |
| #endif |
#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 |
#ifdef INET |
| void |
void |
| #if __STDC__ |
#if __STDC__ |
| Line 216 udp_input(m, va_alist) |
|
| Line 186 udp_input(m, va_alist) |
|
| int iphlen, proto; |
int iphlen, proto; |
| int len; |
int len; |
| int n; |
int n; |
| u_int16_t ip_len; |
|
| |
|
| va_start(ap, m); |
va_start(ap, m); |
| iphlen = va_arg(ap, int); |
iphlen = va_arg(ap, int); |
| Line 263 udp_input(m, va_alist) |
|
| Line 232 udp_input(m, va_alist) |
|
| return; |
return; |
| } |
} |
| #endif |
#endif |
| KASSERT(UDP_HDR_ALIGNED_P(uh)); |
|
| |
|
| /* destination port of 0 is illegal, based on RFC768. */ |
/* destination port of 0 is illegal, based on RFC768. */ |
| if (uh->uh_dport == 0) |
if (uh->uh_dport == 0) |
| Line 273 udp_input(m, va_alist) |
|
| Line 241 udp_input(m, va_alist) |
|
| * 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. |
| */ |
*/ |
| ip_len = ntohs(ip->ip_len); |
|
| len = ntohs((u_int16_t)uh->uh_ulen); |
len = ntohs((u_int16_t)uh->uh_ulen); |
| if (ip_len != iphlen + len) { |
if (ip->ip_len != iphlen + len) { |
| if (ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
| udpstat.udps_badlen++; |
udpstat.udps_badlen++; |
| goto bad; |
goto bad; |
| } |
} |
| m_adj(m, iphlen + len - ip_len); |
m_adj(m, iphlen + len - ip->ip_len); |
| } |
} |
| |
|
| /* |
/* |
| * Checksum extended UDP header and data. |
* Checksum extended UDP header and data. |
| */ |
*/ |
| if (uh->uh_sum) { |
if (uh->uh_sum) { |
| switch (m->m_pkthdr.csum_flags & |
if (in4_cksum(m, IPPROTO_UDP, iphlen, len) != 0) { |
| ((m->m_pkthdr.rcvif->if_csum_flags_rx & M_CSUM_UDPv4) | |
udpstat.udps_badsum++; |
| M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
m_freem(m); |
| case M_CSUM_UDPv4|M_CSUM_TCP_UDP_BAD: |
return; |
| 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; |
|
| } |
} |
| } |
} |
| |
|
| Line 374 udp_input(m, va_alist) |
|
| Line 321 udp_input(m, va_alist) |
|
| bad: |
bad: |
| if (m) |
if (m) |
| m_freem(m); |
m_freem(m); |
| return; |
|
| |
|
| badcsum: |
|
| m_freem(m); |
|
| udpstat.udps_badsum++; |
|
| } |
} |
| #endif |
#endif |
| |
|
| Line 421 udp6_input(mp, offp, proto) |
|
| Line 363 udp6_input(mp, offp, proto) |
|
| return IPPROTO_DONE; |
return IPPROTO_DONE; |
| } |
} |
| #endif |
#endif |
| KASSERT(UDP_HDR_ALIGNED_P(uh)); |
|
| ulen = ntohs((u_short)uh->uh_ulen); |
ulen = ntohs((u_short)uh->uh_ulen); |
| /* |
/* |
| * RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
* RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
| Line 541 udp4_sendup(m, off, src, so) |
|
| Line 482 udp4_sendup(m, off, src, so) |
|
| m_freem(n); |
m_freem(n); |
| if (opts) |
if (opts) |
| m_freem(opts); |
m_freem(opts); |
| udpstat.udps_fullsock++; |
|
| } else |
} else |
| sorwakeup(so); |
sorwakeup(so); |
| } |
} |
| Line 637 udp4_realinput(src, dst, m, off) |
|
| Line 577 udp4_realinput(src, dst, m, off) |
|
| */ |
*/ |
| |
|
| /* |
/* |
| * KAME note: traditionally we dropped 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. |
| */ |
*/ |
| CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) { |
for (inp = udbtable.inpt_queue.cqh_first; |
| |
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 673 udp4_realinput(src, dst, m, off) |
|
| Line 615 udp4_realinput(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.) |
| |
*/ |
| |
udpstat.udps_noportbcast++; |
| |
goto bad; |
| |
} |
| |
#endif |
| } else { |
} else { |
| /* |
/* |
| * Locate pcb for datagram. |
* Locate pcb for datagram. |
| Line 681 udp4_realinput(src, dst, m, off) |
|
| Line 635 udp4_realinput(src, dst, m, off) |
|
| 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++; |
| |
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; |
return rcvcnt; |
| |
} |
| } |
} |
| |
|
| udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
|
|
| |
|
| #ifdef INET6 |
#ifdef INET6 |
| static int |
static int |
| |
in6_mcmatch(in6p, ia6, ifp) |
| |
struct in6pcb *in6p; |
| |
struct in6_addr *ia6; |
| |
struct ifnet *ifp; |
| |
{ |
| |
struct ip6_moptions *im6o = in6p->in6p_moptions; |
| |
struct in6_multi_mship *imm; |
| |
|
| |
if (im6o == NULL) |
| |
return 0; |
| |
|
| |
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; |
| |
} |
| |
|
| |
static int |
| 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 703 udp6_realinput(af, src, dst, m, off) |
|
| Line 704 udp6_realinput(af, src, dst, m, off) |
|
| 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; |
| const struct in_addr *dst4; |
struct in_addr *dst4; |
| struct in6pcb *in6p; |
struct in6pcb *in6p; |
| |
|
| rcvcnt = 0; |
rcvcnt = 0; |
| Line 717 udp6_realinput(af, src, dst, m, off) |
|
| Line 718 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; |
| |
|
| in6_embedscope(&src6, src, NULL, NULL); |
src6 = &src->sin6_addr; |
| sport = src->sin6_port; |
sport = &src->sin6_port; |
| in6_embedscope(&dst6, dst, NULL, NULL); |
dst6 = &dst->sin6_addr; |
| dport = dst->sin6_port; |
dport = &dst->sin6_port; |
| dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr[12]; |
dst4 = (struct in_addr *)&dst->sin6_addr.s6_addr32[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 743 udp6_realinput(af, src, dst, m, off) |
|
| Line 744 udp6_realinput(af, src, dst, m, off) |
|
| */ |
*/ |
| |
|
| /* |
/* |
| * KAME note: traditionally we dropped 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. |
| */ |
*/ |
| /* |
/* |
| Line 751 udp6_realinput(af, src, dst, m, off) |
|
| Line 752 udp6_realinput(af, src, dst, m, off) |
|
| */ |
*/ |
| 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; |
| } else { |
} |
| if (IN6_IS_ADDR_V4MAPPED(&dst6) && |
#ifndef INET6_BINDV6ONLY |
| (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
else { |
| |
if (IN6_IS_ADDR_V4MAPPED(dst6) |
| |
&& (in6p->in6p_flags & IN6P_BINDV6ONLY)) |
| 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, |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, src6) |
| &src6) || in6p->in6p_fport != sport) |
|| in6p->in6p_fport != *sport) |
| continue; |
continue; |
| } else { |
} |
| if (IN6_IS_ADDR_V4MAPPED(&src6) && |
#ifndef INET6_BINDV6ONLY |
| (in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
else { |
| |
if (IN6_IS_ADDR_V4MAPPED(src6) |
| |
&& (in6p->in6p_flags & IN6P_BINDV6ONLY)) |
| continue; |
continue; |
| } |
} |
| |
#endif |
| |
|
| last = in6p; |
last = in6p; |
| udp6_sendup(m, off, (struct sockaddr *)src, |
udp6_sendup(m, off, (struct sockaddr *)src, |
| Line 788 udp6_realinput(af, src, dst, m, off) |
|
| Line 796 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*/ |
| |
|
| |
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*/ |
| |
|
| #ifdef INET |
#ifdef INET |
| /* |
/* |
| * Notify a udp user of an asynchronous error; |
* Notify a udp user of an asynchronous error; |
| Line 894 udp_output(m, va_alist) |
|
| Line 1226 udp_output(m, va_alist) |
|
| * Compute the packet length of the IP header, and |
* Compute the packet length of the IP header, and |
| * punt if the length looks bogus. |
* punt if the length looks bogus. |
| */ |
*/ |
| if (len + sizeof(struct udpiphdr) > IP_MAXPACKET) { |
if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) { |
| error = EMSGSIZE; |
error = EMSGSIZE; |
| goto release; |
goto release; |
| } |
} |
| Line 904 udp_output(m, va_alist) |
|
| Line 1236 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 = htons((u_int16_t)len + sizeof(struct udphdr)); |
ui->ui_ulen = ui->ui_len; |
| |
|
| /* |
/* |
| * Set up checksum and output datagram. |
* Stuff checksum and output datagram. |
| */ |
*/ |
| |
ui->ui_sum = 0; |
| if (udpcksum) { |
if (udpcksum) { |
| /* |
if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0) |
| * XXX Cache pseudo-header checksum part for |
ui->ui_sum = 0xffff; |
| * XXX "connected" UDP sockets. |
} |
| */ |
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len; |
| 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 = htons(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++; |
| Line 968 udp_usrreq(so, req, m, nam, control, p) |
|
| Line 1295 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 1006 udp_usrreq(so, req, m, nam, control, p) |
|
| Line 1332 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 1141 udp_sysctl(name, namelen, oldp, oldlenp, |
|
| Line 1474 udp_sysctl(name, namelen, oldp, oldlenp, |
|
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
return (sysctl_int(oldp, oldlenp, newp, newlen, |
| &udp_sendspace)); |
&udp_sendspace)); |
| case UDPCTL_RECVSPACE: |
case UDPCTL_RECVSPACE: |
| return (sysctl_int(oldp, oldlenp, newp, newlen, |
return (sysctl_int(oldp, oldlenp, newp, newlen, |
| &udp_recvspace)); |
&udp_recvspace)); |
| default: |
default: |
| return (ENOPROTOOPT); |
return (ENOPROTOOPT); |