version 1.42.2.1, 1997/09/16 03:51:20 |
version 1.101, 2003/06/23 11:02:17 |
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/* $NetBSD$ */ |
/* $NetBSD$ */ |
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/* |
/* |
* Copyright (c) 1982, 1986, 1988, 1990, 1993 |
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the project nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* Copyright (c) 1982, 1986, 1988, 1990, 1993, 1995 |
* The Regents of the University of California. All rights reserved. |
* 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 |
|
|
* 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. |
* |
* |
* @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94 |
* @(#)udp_usrreq.c 8.6 (Berkeley) 5/23/95 |
*/ |
*/ |
#include "ipkdb.h" |
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#include <sys/cdefs.h> |
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__KERNEL_RCSID(0, "$NetBSD$"); |
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|
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#include "opt_inet.h" |
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#include "opt_ipsec.h" |
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#include "opt_inet_csum.h" |
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#include "opt_ipkdb.h" |
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#include "opt_mbuftrace.h" |
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#include <sys/param.h> |
#include <sys/param.h> |
#include <sys/malloc.h> |
#include <sys/malloc.h> |
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#include <sys/stat.h> |
#include <sys/stat.h> |
#include <sys/systm.h> |
#include <sys/systm.h> |
#include <sys/proc.h> |
#include <sys/proc.h> |
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#include <sys/domain.h> |
#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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#include <netinet/udp.h> |
#include <netinet/udp.h> |
#include <netinet/udp_var.h> |
#include <netinet/udp_var.h> |
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|
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#ifdef INET6 |
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#include <netinet/ip6.h> |
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#include <netinet/icmp6.h> |
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#include <netinet6/ip6_var.h> |
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#include <netinet6/in6_pcb.h> |
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#include <netinet6/udp6_var.h> |
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#endif |
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|
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#ifndef INET6 |
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/* always need ip6.h for IP6_EXTHDR_GET */ |
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#include <netinet/ip6.h> |
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#endif |
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#include "faith.h" |
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#if defined(NFAITH) && NFAITH > 0 |
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#include <net/if_faith.h> |
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#endif |
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#include <machine/stdarg.h> |
#include <machine/stdarg.h> |
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#ifdef IPSEC |
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#include <netinet6/ipsec.h> |
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#include <netkey/key.h> |
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#endif /*IPSEC*/ |
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#ifdef IPKDB |
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#include <ipkdb/ipkdb.h> |
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#endif |
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/* |
/* |
* UDP protocol implementation. |
* UDP protocol implementation. |
* Per RFC 768, August, 1980. |
* Per RFC 768, August, 1980. |
Line 75 int udpcksum = 1; |
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Line 138 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; |
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struct udpstat udpstat; |
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#ifdef INET |
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static void udp4_sendup __P((struct mbuf *, int, struct sockaddr *, |
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struct socket *)); |
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static int udp4_realinput __P((struct sockaddr_in *, struct sockaddr_in *, |
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struct mbuf *, int)); |
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#endif |
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#ifdef INET6 |
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static void udp6_sendup __P((struct mbuf *, int, struct sockaddr *, |
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struct socket *)); |
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static int udp6_realinput __P((int, struct sockaddr_in6 *, |
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struct sockaddr_in6 *, struct mbuf *, int)); |
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#endif |
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#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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|
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#ifdef MBUFTRACE |
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struct mowner udp_mowner = { "udp" }; |
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struct mowner udp_rx_mowner = { "udp", "rx" }; |
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struct mowner udp_tx_mowner = { "udp", "tx" }; |
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#endif |
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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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|
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#define UDP_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
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#else |
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|
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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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MOWNER_ATTACH(&udp_tx_mowner); |
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MOWNER_ATTACH(&udp_rx_mowner); |
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MOWNER_ATTACH(&udp_mowner); |
} |
} |
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#ifdef INET |
void |
void |
#if __STDC__ |
#if __STDC__ |
udp_input(struct mbuf *m, ...) |
udp_input(struct mbuf *m, ...) |
Line 98 udp_input(m, va_alist) |
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Line 218 udp_input(m, va_alist) |
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va_dcl |
va_dcl |
#endif |
#endif |
{ |
{ |
register struct ip *ip; |
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register struct udphdr *uh; |
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register 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; |
va_list ap; |
struct sockaddr_in udpsrc; |
struct sockaddr_in src, dst; |
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struct ip *ip; |
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struct udphdr *uh; |
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int iphlen; |
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int len; |
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int n; |
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u_int16_t ip_len; |
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va_start(ap, m); |
va_start(ap, m); |
iphlen = va_arg(ap, int); |
iphlen = va_arg(ap, int); |
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(void)va_arg(ap, int); /* ignore value, advance ap */ |
va_end(ap); |
va_end(ap); |
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|
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MCLAIM(m, &udp_rx_mowner); |
udpstat.udps_ipackets++; |
udpstat.udps_ipackets++; |
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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. |
* Get IP and UDP header together in first mbuf. |
*/ |
*/ |
ip = mtod(m, struct ip *); |
ip = mtod(m, struct ip *); |
if (m->m_len < iphlen + sizeof(struct udphdr)) { |
IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr)); |
if ((m = m_pullup(m, iphlen + sizeof(struct udphdr))) == 0) { |
if (uh == NULL) { |
udpstat.udps_hdrops++; |
udpstat.udps_hdrops++; |
return; |
return; |
} |
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ip = mtod(m, struct ip *); |
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} |
} |
uh = (struct udphdr *)((caddr_t)ip + iphlen); |
KASSERT(UDP_HDR_ALIGNED_P(uh)); |
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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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/* |
/* |
* 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. |
*/ |
*/ |
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ip_len = ntohs(ip->ip_len); |
len = ntohs((u_int16_t)uh->uh_ulen); |
len = ntohs((u_int16_t)uh->uh_ulen); |
if (ip->ip_len != len) { |
if (ip_len != iphlen + len) { |
if (len > ip->ip_len) { |
if (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_len); |
/* ip->ip_len = len; */ |
} |
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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_rx & 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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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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} |
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} |
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/* construct source and dst sockaddrs. */ |
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bzero(&src, sizeof(src)); |
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src.sin_family = AF_INET; |
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src.sin_len = sizeof(struct sockaddr_in); |
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bcopy(&ip->ip_src, &src.sin_addr, sizeof(src.sin_addr)); |
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src.sin_port = uh->uh_sport; |
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bzero(&dst, sizeof(dst)); |
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dst.sin_family = AF_INET; |
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dst.sin_len = sizeof(struct sockaddr_in); |
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bcopy(&ip->ip_dst, &dst.sin_addr, sizeof(dst.sin_addr)); |
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dst.sin_port = uh->uh_dport; |
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n = udp4_realinput(&src, &dst, m, iphlen); |
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#ifdef INET6 |
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if (IN_MULTICAST(ip->ip_dst.s_addr) || n == 0) { |
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struct sockaddr_in6 src6, dst6; |
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bzero(&src6, sizeof(src6)); |
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src6.sin6_family = AF_INET6; |
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src6.sin6_len = sizeof(struct sockaddr_in6); |
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src6.sin6_addr.s6_addr[10] = src6.sin6_addr.s6_addr[11] = 0xff; |
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bcopy(&ip->ip_src, &src6.sin6_addr.s6_addr[12], |
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sizeof(ip->ip_src)); |
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src6.sin6_port = uh->uh_sport; |
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bzero(&dst6, sizeof(dst6)); |
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dst6.sin6_family = AF_INET6; |
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dst6.sin6_len = sizeof(struct sockaddr_in6); |
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dst6.sin6_addr.s6_addr[10] = dst6.sin6_addr.s6_addr[11] = 0xff; |
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bcopy(&ip->ip_dst, &dst6.sin6_addr.s6_addr[12], |
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sizeof(ip->ip_dst)); |
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dst6.sin6_port = uh->uh_dport; |
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n += udp6_realinput(AF_INET, &src6, &dst6, m, iphlen); |
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} |
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#endif |
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if (n == 0) { |
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if (m->m_flags & (M_BCAST | M_MCAST)) { |
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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 |
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if (checkipkdb(&ip->ip_src, uh->uh_sport, uh->uh_dport, |
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m, iphlen + sizeof(struct udphdr), |
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m->m_pkthdr.len - iphlen - sizeof(struct udphdr))) { |
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/* |
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* It was a debugger connect packet, |
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* just drop it now |
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*/ |
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goto bad; |
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} |
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#endif |
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icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT, 0, 0); |
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m = NULL; |
} |
} |
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bad: |
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if (m) |
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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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} |
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#endif |
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#ifdef INET6 |
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int |
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udp6_input(mp, offp, proto) |
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struct mbuf **mp; |
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int *offp, proto; |
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{ |
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struct mbuf *m = *mp; |
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int off = *offp; |
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struct sockaddr_in6 src, dst; |
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struct ip6_hdr *ip6; |
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struct udphdr *uh; |
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u_int32_t plen, ulen; |
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|
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ip6 = mtod(m, struct ip6_hdr *); |
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#if defined(NFAITH) && 0 < NFAITH |
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if (faithprefix(&ip6->ip6_dst)) { |
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/* send icmp6 host unreach? */ |
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m_freem(m); |
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return IPPROTO_DONE; |
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} |
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#endif |
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|
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udp6stat.udp6s_ipackets++; |
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|
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/* check for jumbogram is done in ip6_input. we can trust pkthdr.len */ |
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plen = m->m_pkthdr.len - off; |
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IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(struct udphdr)); |
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if (uh == NULL) { |
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ip6stat.ip6s_tooshort++; |
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return IPPROTO_DONE; |
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} |
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KASSERT(UDP_HDR_ALIGNED_P(uh)); |
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ulen = ntohs((u_short)uh->uh_ulen); |
/* |
/* |
* Save a copy of the IP header in case we want restore it |
* RFC2675 section 4: jumbograms will have 0 in the UDP header field, |
* for sending an ICMP error message in response. |
* iff payload length > 0xffff. |
*/ |
*/ |
save_ip = *ip; |
if (ulen == 0 && plen > 0xffff) |
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ulen = plen; |
|
|
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if (plen != ulen) { |
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udp6stat.udp6s_badlen++; |
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goto bad; |
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} |
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|
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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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/* Be proactive about malicious use of IPv4 mapped address */ |
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if (IN6_IS_ADDR_V4MAPPED(&ip6->ip6_src) || |
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IN6_IS_ADDR_V4MAPPED(&ip6->ip6_dst)) { |
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/* XXX stat */ |
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goto bad; |
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} |
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/* |
/* |
* Checksum extended UDP header and data. |
* Checksum extended UDP header and data. |
*/ |
*/ |
if (uh->uh_sum) { |
if (uh->uh_sum == 0) |
bzero(((struct ipovly *)ip)->ih_x1, |
udp6stat.udp6s_nosum++; |
sizeof ((struct ipovly *)ip)->ih_x1); |
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { |
((struct ipovly *)ip)->ih_len = uh->uh_ulen; |
udp6stat.udp6s_badsum++; |
if ((uh->uh_sum = in_cksum(m, len + sizeof (struct ip))) != 0) { |
goto bad; |
udpstat.udps_badsum++; |
} |
m_freem(m); |
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return; |
/* |
|
* Construct source and dst sockaddrs. |
|
* Note that ifindex (s6_addr16[1]) is already filled. |
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*/ |
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bzero(&src, sizeof(src)); |
|
src.sin6_family = AF_INET6; |
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src.sin6_len = sizeof(struct sockaddr_in6); |
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/* KAME hack: recover scopeid */ |
|
(void)in6_recoverscope(&src, &ip6->ip6_src, m->m_pkthdr.rcvif); |
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src.sin6_port = uh->uh_sport; |
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bzero(&dst, sizeof(dst)); |
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dst.sin6_family = AF_INET6; |
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dst.sin6_len = sizeof(struct sockaddr_in6); |
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/* KAME hack: recover scopeid */ |
|
(void)in6_recoverscope(&dst, &ip6->ip6_dst, m->m_pkthdr.rcvif); |
|
dst.sin6_port = uh->uh_dport; |
|
|
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if (udp6_realinput(AF_INET6, &src, &dst, m, off) == 0) { |
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if (m->m_flags & M_MCAST) { |
|
udp6stat.udp6s_noportmcast++; |
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goto bad; |
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} |
|
udp6stat.udp6s_noport++; |
|
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); |
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m = NULL; |
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} |
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|
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bad: |
|
if (m) |
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m_freem(m); |
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return IPPROTO_DONE; |
|
} |
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#endif |
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|
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#ifdef INET |
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static void |
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udp4_sendup(m, off, src, so) |
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struct mbuf *m; |
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int off; /* offset of data portion */ |
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struct sockaddr *src; |
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struct socket *so; |
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{ |
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struct mbuf *opts = NULL; |
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struct mbuf *n; |
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struct inpcb *inp = NULL; |
|
|
|
if (!so) |
|
return; |
|
switch (so->so_proto->pr_domain->dom_family) { |
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case AF_INET: |
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inp = sotoinpcb(so); |
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break; |
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#ifdef INET6 |
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case AF_INET6: |
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break; |
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#endif |
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default: |
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return; |
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} |
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|
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#ifdef IPSEC |
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/* check AH/ESP integrity. */ |
|
if (so != NULL && ipsec4_in_reject_so(m, so)) { |
|
ipsecstat.in_polvio++; |
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return; |
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} |
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#endif /*IPSEC*/ |
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|
|
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); |
|
udpstat.udps_fullsock++; |
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} else |
|
sorwakeup(so); |
} |
} |
|
} |
|
#endif |
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|
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#ifdef INET6 |
|
static void |
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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; |
|
|
if (IN_MULTICAST(ip->ip_dst.s_addr) || |
src4 = &src->sin_addr; |
in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) { |
sport = &src->sin_port; |
struct inpcb *last; |
dst4 = &dst->sin_addr; |
|
dport = &dst->sin_port; |
|
|
|
if (IN_MULTICAST(dst4->s_addr) || |
|
in_broadcast(*dst4, m->m_pkthdr.rcvif)) { |
/* |
/* |
* 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 191 udp_input(m, va_alist) |
|
Line 606 udp_input(m, va_alist) |
|
*/ |
*/ |
|
|
/* |
/* |
* Construct sockaddr format source address. |
* KAME note: traditionally we dropped udpiphdr from mbuf here. |
|
* we need udpiphdr for IPsec processing so we do that later. |
*/ |
*/ |
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)); |
|
|
|
iphlen += sizeof(struct udphdr); |
|
m->m_len -= iphlen; |
|
m->m_pkthdr.len -= iphlen; |
|
m->m_data += iphlen; |
|
/* |
/* |
* Locate pcb(s) for datagram. |
* Locate pcb(s) for datagram. |
* (Algorithm copied from raw_intr().) |
|
*/ |
*/ |
last = NULL; |
CIRCLEQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) { |
for (inp = udbtable.inpt_queue.cqh_first; |
if (inp->inp_lport != *dport) |
inp != (struct inpcb *)&udbtable.inpt_queue; |
|
inp = inp->inp_queue.cqe_next) { |
|
if (inp->inp_lport != uh->uh_dport) |
|
continue; |
continue; |
if (!in_nullhost(inp->inp_laddr)) { |
if (!in_nullhost(inp->inp_laddr)) { |
if (!in_hosteq(inp->inp_laddr, ip->ip_dst)) |
if (!in_hosteq(inp->inp_laddr, *dst4)) |
continue; |
continue; |
} |
} |
if (!in_nullhost(inp->inp_faddr)) { |
if (!in_nullhost(inp->inp_faddr)) { |
if (!in_hosteq(inp->inp_faddr, ip->ip_src) || |
if (!in_hosteq(inp->inp_faddr, *src4) || |
inp->inp_fport != uh->uh_sport) |
inp->inp_fport != *sport) |
continue; |
continue; |
} |
} |
|
|
if (last != NULL) { |
udp4_sendup(m, off, (struct sockaddr *)src, |
struct mbuf *n; |
inp->inp_socket); |
|
rcvcnt++; |
|
|
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); |
|
} |
|
if (sbappendaddr( |
|
&last->inp_socket->so_rcv, |
|
sintosa(&udpsrc), 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 |
* Don't look for additional matches if this one does |
* not have either the SO_REUSEPORT or SO_REUSEADDR |
* not have either the SO_REUSEPORT or SO_REUSEADDR |
* socket options set. This heuristic avoids searching |
* socket options set. This heuristic avoids searching |
* through all pcbs in the common case of a non-shared |
* through all pcbs in the common case of a non-shared |
* port. It * assumes that an application will never |
* port. It assumes that an application will never |
* clear these options after setting them. |
* clear these options after setting them. |
*/ |
*/ |
if ((last->inp_socket->so_options & |
if ((inp->inp_socket->so_options & |
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
break; |
break; |
} |
} |
|
} 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) |
|
return rcvcnt; |
|
} |
|
|
|
udp4_sendup(m, off, (struct sockaddr *)src, inp->inp_socket); |
|
rcvcnt++; |
|
} |
|
|
|
bad: |
|
return rcvcnt; |
|
} |
|
#endif |
|
|
|
#ifdef INET6 |
|
static int |
|
udp6_realinput(af, src, dst, m, off) |
|
int af; /* af on packet */ |
|
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_addr[12]; |
|
|
|
if (IN6_IS_ADDR_MULTICAST(&dst6) || |
|
(af == AF_INET && IN_MULTICAST(dst4->s_addr))) { |
|
/* |
|
* 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: traditionally we dropped 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)) |
|
continue; |
|
} else { |
|
if (IN6_IS_ADDR_V4MAPPED(&dst6) && |
|
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
|
continue; |
|
} |
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { |
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, |
|
&src6) || in6p->in6p_fport != sport) |
|
continue; |
|
} else { |
|
if (IN6_IS_ADDR_V4MAPPED(&src6) && |
|
(in6p->in6p_flags & IN6P_IPV6_V6ONLY)) |
|
continue; |
|
} |
|
|
|
udp6_sendup(m, off, (struct sockaddr *)src, |
|
in6p->in6p_socket); |
|
rcvcnt++; |
|
|
if (last == NULL) { |
|
/* |
/* |
* No matching pcb found; discard datagram. |
* Don't look for additional matches if this one does |
* (No need to send an ICMP Port Unreachable |
* not have either the SO_REUSEPORT or SO_REUSEADDR |
* for a broadcast or multicast datgram.) |
* 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. |
*/ |
*/ |
udpstat.udps_noportbcast++; |
if ((in6p->in6p_socket->so_options & |
goto bad; |
(SO_REUSEPORT|SO_REUSEADDR)) == 0) |
} |
break; |
if (last->inp_flags & INP_CONTROLOPTS || |
|
last->inp_socket->so_options & SO_TIMESTAMP) |
|
ip_savecontrol(last, &opts, ip, m); |
|
if (sbappendaddr(&last->inp_socket->so_rcv, |
|
sintosa(&udpsrc), m, opts) == 0) { |
|
udpstat.udps_fullsock++; |
|
goto bad; |
|
} |
} |
sorwakeup(last->inp_socket); |
} else { |
return; |
/* |
} |
* Locate pcb for datagram. |
/* |
*/ |
* Locate pcb for datagram. |
in6p = in6_pcblookup_connect(&udb6, &src6, sport, |
*/ |
&dst6, dport, 0); |
inp = in_pcblookup_connect(&udbtable, ip->ip_src, uh->uh_sport, |
if (in6p == 0) { |
ip->ip_dst, uh->uh_dport); |
++udpstat.udps_pcbhashmiss; |
if (inp == 0) { |
in6p = in6_pcblookup_bind(&udb6, &dst6, dport, 0); |
++udpstat.udps_pcbhashmiss; |
if (in6p == 0) |
inp = in_pcblookup_bind(&udbtable, ip->ip_dst, uh->uh_dport); |
return rcvcnt; |
if (inp == 0) { |
|
udpstat.udps_noport++; |
|
if (m->m_flags & (M_BCAST | M_MCAST)) { |
|
udpstat.udps_noportbcast++; |
|
goto bad; |
|
} |
|
*ip = save_ip; |
|
#if NIPKDB > 0 |
|
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; |
|
} |
} |
} |
|
|
|
/* |
udp6_sendup(m, off, (struct sockaddr *)src, in6p->in6p_socket); |
* Construct sockaddr format source address. |
rcvcnt++; |
* Stuff source address and datagram in user buffer. |
|
*/ |
|
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 (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; |
|
if (sbappendaddr(&inp->inp_socket->so_rcv, sintosa(&udpsrc), m, |
|
opts) == 0) { |
|
udpstat.udps_fullsock++; |
|
goto bad; |
|
} |
} |
sorwakeup(inp->inp_socket); |
|
return; |
|
bad: |
bad: |
m_freem(m); |
return rcvcnt; |
if (opts) |
|
m_freem(opts); |
|
} |
} |
|
#endif |
|
|
|
#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 |
static void |
udp_notify(inp, errno) |
udp_notify(inp, errno) |
register struct inpcb *inp; |
struct inpcb *inp; |
int errno; |
int errno; |
{ |
{ |
|
|
Line 359 udp_ctlinput(cmd, sa, v) |
|
Line 798 udp_ctlinput(cmd, sa, v) |
|
struct sockaddr *sa; |
struct sockaddr *sa; |
void *v; |
void *v; |
{ |
{ |
register struct ip *ip = v; |
struct ip *ip = v; |
register struct udphdr *uh; |
struct udphdr *uh; |
extern int inetctlerrmap[]; |
|
void (*notify) __P((struct inpcb *, int)) = udp_notify; |
void (*notify) __P((struct inpcb *, int)) = udp_notify; |
int errno; |
int errno; |
|
|
|
if (sa->sa_family != AF_INET |
|
|| sa->sa_len != sizeof(struct sockaddr_in)) |
|
return NULL; |
if ((unsigned)cmd >= PRC_NCMDS) |
if ((unsigned)cmd >= PRC_NCMDS) |
return NULL; |
return NULL; |
errno = inetctlerrmap[cmd]; |
errno = inetctlerrmap[cmd]; |
Line 378 udp_ctlinput(cmd, sa, v) |
|
Line 819 udp_ctlinput(cmd, sa, v) |
|
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
uh = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2)); |
in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, |
in_pcbnotify(&udbtable, satosin(sa)->sin_addr, uh->uh_dport, |
ip->ip_src, uh->uh_sport, errno, notify); |
ip->ip_src, uh->uh_sport, errno, notify); |
|
|
|
/* XXX mapped address case */ |
} else |
} else |
in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, |
in_pcbnotifyall(&udbtable, satosin(sa)->sin_addr, errno, |
notify); |
notify); |
Line 393 udp_output(m, va_alist) |
|
Line 836 udp_output(m, va_alist) |
|
va_dcl |
va_dcl |
#endif |
#endif |
{ |
{ |
register struct inpcb *inp; |
struct inpcb *inp; |
register struct udpiphdr *ui; |
struct udpiphdr *ui; |
register int len = m->m_pkthdr.len; |
int len = m->m_pkthdr.len; |
int error = 0; |
int error = 0; |
va_list ap; |
va_list ap; |
|
|
|
MCLAIM(m, &udp_tx_mowner); |
va_start(ap, m); |
va_start(ap, m); |
inp = va_arg(ap, struct inpcb *); |
inp = va_arg(ap, struct inpcb *); |
va_end(ap); |
va_end(ap); |
Line 417 udp_output(m, va_alist) |
|
Line 861 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 427 udp_output(m, va_alist) |
|
Line 871 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. |
((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++; |
|
|
|
#ifdef IPSEC |
|
if (ipsec_setsocket(m, inp->inp_socket) != 0) { |
|
error = ENOBUFS; |
|
goto release; |
|
} |
|
#endif /*IPSEC*/ |
|
|
return (ip_output(m, inp->inp_options, &inp->inp_route, |
return (ip_output(m, inp->inp_options, &inp->inp_route, |
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), |
inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST), |
inp->inp_moptions)); |
inp->inp_moptions)); |
Line 469 udp_usrreq(so, req, m, nam, control, p) |
|
Line 926 udp_usrreq(so, req, m, nam, control, p) |
|
struct mbuf *m, *nam, *control; |
struct mbuf *m, *nam, *control; |
struct proc *p; |
struct proc *p; |
{ |
{ |
register struct inpcb *inp; |
struct inpcb *inp; |
int s; |
int s; |
register int error = 0; |
int error = 0; |
|
|
if (req == PRU_CONTROL) |
if (req == PRU_CONTROL) |
return (in_control(so, (long)m, (caddr_t)nam, |
return (in_control(so, (long)m, (caddr_t)nam, |
(struct ifnet *)control, p)); |
(struct ifnet *)control, p)); |
|
|
|
if (req == PRU_PURGEIF) { |
|
in_pcbpurgeif0(&udbtable, (struct ifnet *)control); |
|
in_purgeif((struct ifnet *)control); |
|
in_pcbpurgeif(&udbtable, (struct ifnet *)control); |
|
return (0); |
|
} |
|
|
s = splsoftnet(); |
s = splsoftnet(); |
inp = sotoinpcb(so); |
inp = sotoinpcb(so); |
#ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
Line 499 udp_usrreq(so, req, m, nam, control, p) |
|
Line 963 udp_usrreq(so, req, m, nam, control, p) |
|
error = EISCONN; |
error = EISCONN; |
break; |
break; |
} |
} |
|
#ifdef MBUFTRACE |
|
so->so_mowner = &udp_mowner; |
|
so->so_rcv.sb_mowner = &udp_rx_mowner; |
|
so->so_snd.sb_mowner = &udp_tx_mowner; |
|
#endif |
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
error = soreserve(so, udp_sendspace, udp_recvspace); |
error = soreserve(so, udp_sendspace, udp_recvspace); |
if (error) |
if (error) |
Line 539 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1008 udp_usrreq(so, req, m, nam, control, p) |
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
so->so_state &= ~SS_ISCONNECTED; /* XXX */ |
in_pcbdisconnect(inp); |
in_pcbdisconnect(inp); |
inp->inp_laddr = zeroin_addr; /* XXX */ |
inp->inp_laddr = zeroin_addr; /* XXX */ |
|
if (inp->inp_ia != NULL) { |
|
LIST_REMOVE(inp, inp_ialink); |
|
IFAFREE(&inp->inp_ia->ia_ifa); |
|
inp->inp_ia = NULL; |
|
} |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
break; |
break; |
|
|
Line 567 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1041 udp_usrreq(so, req, m, nam, control, p) |
|
goto die; |
goto die; |
} |
} |
error = in_pcbconnect(inp, nam); |
error = in_pcbconnect(inp, nam); |
if (error) { |
if (error) |
die: |
goto die; |
m_freem(m); |
|
break; |
|
} |
|
} else { |
} else { |
if ((so->so_state & SS_ISCONNECTED) == 0) { |
if ((so->so_state & SS_ISCONNECTED) == 0) { |
error = ENOTCONN; |
error = ENOTCONN; |
Line 579 udp_usrreq(so, req, m, nam, control, p) |
|
Line 1050 udp_usrreq(so, req, m, nam, control, p) |
|
} |
} |
} |
} |
error = udp_output(m, inp); |
error = udp_output(m, inp); |
|
m = NULL; |
if (nam) { |
if (nam) { |
in_pcbdisconnect(inp); |
in_pcbdisconnect(inp); |
inp->inp_laddr = laddr; /* XXX */ |
inp->inp_laddr = laddr; /* XXX */ |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
in_pcbstate(inp, INP_BOUND); /* XXX */ |
} |
} |
|
die: |
|
if (inp->inp_ia != NULL && in_nullhost(inp->inp_laddr)) { |
|
LIST_REMOVE(inp, inp_ialink); |
|
IFAFREE(&inp->inp_ia->ia_ifa); |
|
inp->inp_ia = NULL; |
|
} |
|
if (m) |
|
m_freem(m); |
} |
} |
break; |
break; |
|
|
Line 644 udp_sysctl(name, namelen, oldp, oldlenp, |
|
Line 1124 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); |
} |
} |
/* NOTREACHED */ |
/* NOTREACHED */ |
} |
} |
|
#endif |