version 1.75.2.4, 2001/10/22 20:41:58 |
version 1.95, 2002/06/30 22:40:37 |
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/* |
/* |
* 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 |
|
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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 <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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#include "opt_inet.h" |
#include "opt_inet.h" |
#include "opt_ipsec.h" |
#include "opt_ipsec.h" |
#include "opt_inet_csum.h" |
#include "opt_inet_csum.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 <uvm/uvm_extern.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> |
Line 138 int udpcksum = 1; |
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Line 139 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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struct inpcbtable udbtable; |
|
struct udpstat udpstat; |
|
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#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 147 static int udp4_realinput __P((struct so |
|
Line 151 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 |
|
|
#endif /* UDP_CSUM_COUNTERS */ |
#endif /* UDP_CSUM_COUNTERS */ |
} |
} |
|
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#ifndef UDP6 |
|
#ifdef INET |
#ifdef INET |
void |
void |
#if __STDC__ |
#if __STDC__ |
Line 261 udp_input(m, va_alist) |
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Line 262 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 417 udp6_input(mp, offp, proto) |
|
Line 419 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 632 udp4_realinput(src, dst, m, off) |
|
Line 635 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: traditionally we dropped 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)) { |
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|
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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, |
|
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 |
|
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 741 udp6_realinput(af, src, dst, m, off) |
|
Line 719 udp6_realinput(af, src, dst, m, off) |
|
sport = src->sin6_port; |
sport = src->sin6_port; |
in6_embedscope(&dst6, dst, NULL, NULL); |
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]; |
|
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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))) { |
Line 763 udp6_realinput(af, src, dst, m, off) |
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Line 741 udp6_realinput(af, src, dst, m, off) |
|
*/ |
*/ |
|
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/* |
/* |
* KAME note: usually we drop udpiphdr from mbuf here. |
* KAME note: traditionally we dropped 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 774 udp6_realinput(af, src, dst, m, off) |
|
Line 752 udp6_realinput(af, src, dst, m, off) |
|
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 { |
else { |
|
if (IN6_IS_ADDR_V4MAPPED(&dst6) && |
if (IN6_IS_ADDR_V4MAPPED(&dst6) && |
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
continue; |
continue; |
Line 787 udp6_realinput(af, src, dst, m, off) |
|
Line 763 udp6_realinput(af, src, dst, m, off) |
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, |
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, |
&src6) || in6p->in6p_fport != sport) |
&src6) || in6p->in6p_fport != sport) |
continue; |
continue; |
} |
} else { |
else { |
|
if (IN6_IS_ADDR_V4MAPPED(&src6) && |
if (IN6_IS_ADDR_V4MAPPED(&src6) && |
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
continue; |
continue; |
|
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} |
} |
#endif |
#endif |
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#else /*UDP6*/ |
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void |
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#if __STDC__ |
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udp_input(struct mbuf *m, ...) |
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#else |
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udp_input(m, va_alist) |
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struct mbuf *m; |
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va_dcl |
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#endif |
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{ |
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int proto; |
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struct ip *ip; |
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struct udphdr *uh; |
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struct inpcb *inp; |
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struct mbuf *opts = 0; |
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int len; |
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struct ip save_ip; |
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int iphlen; |
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va_list ap; |
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struct sockaddr_in udpsrc; |
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struct sockaddr *sa; |
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va_start(ap, m); |
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iphlen = va_arg(ap, int); |
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proto = va_arg(ap, int); |
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va_end(ap); |
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udpstat.udps_ipackets++; |
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/* |
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* Strip IP options, if any; should skip this, |
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* make available to user, and use on returned packets, |
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* but we don't yet have a way to check the checksum |
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* with options still present. |
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*/ |
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if (iphlen > sizeof (struct ip)) { |
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ip_stripoptions(m, (struct mbuf *)0); |
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iphlen = sizeof(struct ip); |
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} |
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/* |
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* Get IP and UDP header together in first mbuf. |
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*/ |
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ip = mtod(m, struct ip *); |
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if (m->m_len < iphlen + sizeof(struct udphdr)) { |
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if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
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udpstat.udps_hdrops++; |
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return; |
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} |
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ip = mtod(m, struct ip *); |
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} |
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uh = (struct udphdr *)((caddr_t)ip + iphlen); |
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/* destination port of 0 is illegal, based on RFC768. */ |
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if (uh->uh_dport == 0) |
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goto bad; |
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/* |
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* Make mbuf data length reflect UDP length. |
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* If not enough data to reflect UDP length, drop. |
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*/ |
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len = ntohs((u_int16_t)uh->uh_ulen); |
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if (ip->ip_len != iphlen + len) { |
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if (ip->ip_len < iphlen + len || len < sizeof(struct udphdr)) { |
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udpstat.udps_badlen++; |
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goto bad; |
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} |
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m_adj(m, iphlen + len - ip->ip_len); |
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} |
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/* |
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* Save a copy of the IP header in case we want restore it |
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* for sending an ICMP error message in response. |
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*/ |
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save_ip = *ip; |
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/* |
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* Checksum extended UDP header and data. |
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*/ |
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if (uh->uh_sum) { |
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switch (m->m_pkthdr.csum_flags & |
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((m->m_pkthdr.rcvif->if_csum_flags & M_CSUM_UDPv4) | |
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M_CSUM_TCP_UDP_BAD | M_CSUM_DATA)) { |
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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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|
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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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|
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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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bzero(((struct ipovly *)ip)->ih_x1, |
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sizeof ((struct ipovly *)ip)->ih_x1); |
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((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
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if (in_cksum(m, len + sizeof (struct ip)) != 0) |
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goto badcsum; |
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break; |
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} |
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} |
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/* |
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* Construct sockaddr format source address. |
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*/ |
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udpsrc.sin_family = AF_INET; |
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udpsrc.sin_len = sizeof(struct sockaddr_in); |
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udpsrc.sin_addr = ip->ip_src; |
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udpsrc.sin_port = uh->uh_sport; |
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bzero((caddr_t)udpsrc.sin_zero, sizeof(udpsrc.sin_zero)); |
|
|
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if (IN_MULTICAST(ip->ip_dst.s_addr) || |
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in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { |
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struct inpcb *last; |
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/* |
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* 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. |
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* (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 |
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* a wildcard socket listening to the same port -- they would |
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* end up receiving duplicates of every unicast datagram. |
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* Those applications open the multiple sockets to overcome an |
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* inadequacy of the UDP socket interface, but for backwards |
|
* compatibility we avoid the problem here rather than |
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* fixing the interface. Maybe 4.5BSD will remedy this?) |
|
*/ |
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iphlen += sizeof(struct udphdr); |
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/* |
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* KAME note: usually we drop udpiphdr from mbuf here. |
|
* we need udpiphdr for IPsec processing so we do that later. |
|
*/ |
|
/* |
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* Locate pcb(s) for datagram. |
|
* (Algorithm copied from raw_intr().) |
|
*/ |
|
last = NULL; |
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for (inp = udbtable.inpt_queue.cqh_first; |
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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; |
|
} |
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if (!in_nullhost(inp->inp_faddr)) { |
|
if (!in_hosteq(inp->inp_faddr, ip->ip_src) || |
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inp->inp_fport != uh->uh_sport) |
|
continue; |
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} |
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|
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if (last != NULL) { |
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struct mbuf *n; |
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|
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#ifdef IPSEC |
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/* check AH/ESP integrity. */ |
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if (last != NULL && ipsec4_in_reject(m, last)) { |
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ipsecstat.in_polvio++; |
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/* do not inject data to pcb */ |
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} else |
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#endif /*IPSEC*/ |
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if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { |
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if (last->inp_flags & INP_CONTROLOPTS |
|
|| last->inp_socket->so_options & |
|
SO_TIMESTAMP) { |
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ip_savecontrol(last, &opts, |
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ip, n); |
|
} |
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m_adj(n, iphlen); |
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sa = (struct sockaddr *)&udpsrc; |
|
if (sbappendaddr( |
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&last->inp_socket->so_rcv, |
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sa, n, opts) == 0) { |
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m_freem(n); |
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if (opts) |
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m_freem(opts); |
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udpstat.udps_fullsock++; |
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} else |
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sorwakeup(last->inp_socket); |
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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); |
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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, |
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uh->uh_sport, |
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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); |
|
return; |
|
|
|
badcsum: |
|
udpstat.udps_badsum++; |
|
m_freem(m); |
|
} |
|
#endif /*UDP6*/ |
|
|
|
#ifdef INET |
#ifdef INET |
/* |
/* |
* Notify a udp user of an asynchronous error; |
* Notify a udp user of an asynchronous error; |
Line 1467 udp_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1139 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); |