1316 lines
33 KiB
C
1316 lines
33 KiB
C
/* $OpenBSD: udp_usrreq.c,v 1.312 2023/12/01 15:30:47 bluhm Exp $ */
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/* $NetBSD: udp_usrreq.c,v 1.28 1996/03/16 23:54:03 christos Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1988, 1990, 1993
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* The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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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* @(#)COPYRIGHT 1.1 (NRL) 17 January 1995
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*
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* NRL grants permission for redistribution and use in source and binary
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* forms, with or without modification, of the software and documentation
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* created at NRL provided that the following conditions are met:
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*
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgements:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* This product includes software developed at the Information
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* Technology Division, US Naval Research Laboratory.
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* 4. Neither the name of the NRL 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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* THE SOFTWARE PROVIDED BY NRL IS PROVIDED BY NRL AND CONTRIBUTORS ``AS
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* IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NRL OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation
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* are those of the authors and should not be interpreted as representing
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* official policies, either expressed or implied, of the US Naval
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* Research Laboratory (NRL).
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#include <sys/protosw.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sysctl.h>
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#include <sys/domain.h>
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#include <net/if.h>
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#include <net/if_var.h>
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#include <net/if_media.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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#include <netinet/ip.h>
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#include <netinet/in_pcb.h>
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#include <netinet/ip_var.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/udp.h>
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#include <netinet/udp_var.h>
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#ifdef IPSEC
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#include <netinet/ip_ipsp.h>
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#include <netinet/ip_esp.h>
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#endif
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#ifdef INET6
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#include <netinet6/in6_var.h>
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#include <netinet6/ip6_var.h>
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#include <netinet6/ip6protosw.h>
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#endif /* INET6 */
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#include "pf.h"
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#if NPF > 0
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#include <net/pfvar.h>
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#endif
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#ifdef PIPEX
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#include <netinet/if_ether.h>
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#include <net/pipex.h>
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#endif
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/*
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* UDP protocol implementation.
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* Per RFC 768, August, 1980.
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*/
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int udpcksum = 1;
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u_int udp_sendspace = 9216; /* really max datagram size */
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u_int udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
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/* 40 1K datagrams */
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const struct pr_usrreqs udp_usrreqs = {
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.pru_attach = udp_attach,
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.pru_detach = udp_detach,
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.pru_lock = udp_lock,
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.pru_unlock = udp_unlock,
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.pru_bind = udp_bind,
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.pru_connect = udp_connect,
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.pru_disconnect = udp_disconnect,
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.pru_shutdown = udp_shutdown,
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.pru_send = udp_send,
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.pru_control = in_control,
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.pru_sockaddr = in_sockaddr,
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.pru_peeraddr = in_peeraddr,
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};
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#ifdef INET6
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const struct pr_usrreqs udp6_usrreqs = {
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.pru_attach = udp_attach,
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.pru_detach = udp_detach,
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.pru_lock = udp_lock,
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.pru_unlock = udp_unlock,
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.pru_bind = udp_bind,
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.pru_connect = udp_connect,
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.pru_disconnect = udp_disconnect,
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.pru_shutdown = udp_shutdown,
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.pru_send = udp_send,
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.pru_control = in6_control,
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.pru_sockaddr = in6_sockaddr,
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.pru_peeraddr = in6_peeraddr,
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};
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#endif
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const struct sysctl_bounded_args udpctl_vars[] = {
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{ UDPCTL_CHECKSUM, &udpcksum, 0, 1 },
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{ UDPCTL_RECVSPACE, &udp_recvspace, 0, INT_MAX },
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{ UDPCTL_SENDSPACE, &udp_sendspace, 0, INT_MAX },
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};
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struct inpcbtable udbtable;
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struct cpumem *udpcounters;
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void udp_sbappend(struct inpcb *, struct mbuf *, struct ip *,
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struct ip6_hdr *, int, struct udphdr *, struct sockaddr *,
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u_int32_t);
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int udp_output(struct inpcb *, struct mbuf *, struct mbuf *, struct mbuf *);
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void udp_notify(struct inpcb *, int);
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int udp_sysctl_udpstat(void *, size_t *, void *);
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#ifndef UDB_INITIAL_HASH_SIZE
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#define UDB_INITIAL_HASH_SIZE 128
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#endif
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void
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udp_init(void)
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{
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udpcounters = counters_alloc(udps_ncounters);
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in_pcbinit(&udbtable, UDB_INITIAL_HASH_SIZE);
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}
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int
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udp_input(struct mbuf **mp, int *offp, int proto, int af)
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{
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struct mbuf *m = *mp;
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int iphlen = *offp;
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struct ip *ip = NULL;
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struct udphdr *uh;
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struct inpcb *inp = NULL;
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struct ip save_ip;
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int len;
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u_int16_t savesum;
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union {
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struct sockaddr sa;
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struct sockaddr_in sin;
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#ifdef INET6
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struct sockaddr_in6 sin6;
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#endif /* INET6 */
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} srcsa, dstsa;
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struct ip6_hdr *ip6 = NULL;
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u_int32_t ipsecflowinfo = 0;
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udpstat_inc(udps_ipackets);
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IP6_EXTHDR_GET(uh, struct udphdr *, m, iphlen, sizeof(struct udphdr));
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if (!uh) {
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udpstat_inc(udps_hdrops);
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return IPPROTO_DONE;
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}
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/* Check for illegal destination port 0 */
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if (uh->uh_dport == 0) {
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udpstat_inc(udps_noport);
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goto bad;
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}
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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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switch (af) {
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case AF_INET:
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if (m->m_pkthdr.len - iphlen != len) {
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if (len > (m->m_pkthdr.len - iphlen) ||
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len < sizeof(struct udphdr)) {
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udpstat_inc(udps_badlen);
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goto bad;
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}
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m_adj(m, len - (m->m_pkthdr.len - iphlen));
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}
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ip = mtod(m, struct ip *);
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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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break;
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#ifdef INET6
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case AF_INET6:
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/* jumbograms */
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if (len == 0 && m->m_pkthdr.len - iphlen > 0xffff)
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len = m->m_pkthdr.len - iphlen;
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if (len != m->m_pkthdr.len - iphlen) {
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udpstat_inc(udps_badlen);
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goto bad;
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}
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ip6 = mtod(m, struct ip6_hdr *);
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break;
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#endif /* INET6 */
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default:
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unhandled_af(af);
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}
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/*
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* Checksum extended UDP header and data.
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* from W.R.Stevens: check incoming udp cksums even if
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* udpcksum is not set.
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*/
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savesum = uh->uh_sum;
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if (uh->uh_sum == 0) {
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udpstat_inc(udps_nosum);
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#ifdef INET6
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/*
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* In IPv6, the UDP checksum is ALWAYS used.
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*/
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if (ip6)
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goto bad;
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#endif /* INET6 */
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} else {
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if ((m->m_pkthdr.csum_flags & M_UDP_CSUM_IN_OK) == 0) {
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if (m->m_pkthdr.csum_flags & M_UDP_CSUM_IN_BAD) {
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udpstat_inc(udps_badsum);
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goto bad;
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}
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udpstat_inc(udps_inswcsum);
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if (ip)
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uh->uh_sum = in4_cksum(m, IPPROTO_UDP,
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iphlen, len);
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#ifdef INET6
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else if (ip6)
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uh->uh_sum = in6_cksum(m, IPPROTO_UDP,
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iphlen, len);
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#endif /* INET6 */
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if (uh->uh_sum != 0) {
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udpstat_inc(udps_badsum);
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goto bad;
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}
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}
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}
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#ifdef IPSEC
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if (udpencap_enable && udpencap_port && esp_enable &&
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#if NPF > 0
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!(m->m_pkthdr.pf.flags & PF_TAG_DIVERTED) &&
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#endif
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uh->uh_dport == htons(udpencap_port)) {
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u_int32_t spi;
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int skip = iphlen + sizeof(struct udphdr);
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if (m->m_pkthdr.len - skip < sizeof(u_int32_t)) {
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/* packet too short */
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m_freem(m);
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return IPPROTO_DONE;
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}
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m_copydata(m, skip, sizeof(u_int32_t), (caddr_t) &spi);
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/*
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* decapsulate if the SPI is not zero, otherwise pass
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* to userland
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*/
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if (spi != 0) {
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int protoff;
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if ((m = *mp = m_pullup(m, skip)) == NULL) {
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udpstat_inc(udps_hdrops);
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return IPPROTO_DONE;
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}
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/* remove the UDP header */
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bcopy(mtod(m, u_char *),
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mtod(m, u_char *) + sizeof(struct udphdr), iphlen);
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m_adj(m, sizeof(struct udphdr));
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skip -= sizeof(struct udphdr);
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espstat_inc(esps_udpencin);
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protoff = af == AF_INET ? offsetof(struct ip, ip_p) :
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offsetof(struct ip6_hdr, ip6_nxt);
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return ipsec_common_input(mp, skip, protoff,
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af, IPPROTO_ESP, 1);
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}
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}
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#endif /* IPSEC */
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switch (af) {
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case AF_INET:
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bzero(&srcsa, sizeof(struct sockaddr_in));
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srcsa.sin.sin_len = sizeof(struct sockaddr_in);
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srcsa.sin.sin_family = AF_INET;
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srcsa.sin.sin_port = uh->uh_sport;
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srcsa.sin.sin_addr = ip->ip_src;
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bzero(&dstsa, sizeof(struct sockaddr_in));
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dstsa.sin.sin_len = sizeof(struct sockaddr_in);
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dstsa.sin.sin_family = AF_INET;
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dstsa.sin.sin_port = uh->uh_dport;
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dstsa.sin.sin_addr = ip->ip_dst;
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break;
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#ifdef INET6
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case AF_INET6:
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bzero(&srcsa, sizeof(struct sockaddr_in6));
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srcsa.sin6.sin6_len = sizeof(struct sockaddr_in6);
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srcsa.sin6.sin6_family = AF_INET6;
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srcsa.sin6.sin6_port = uh->uh_sport;
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#if 0 /*XXX inbound flowinfo */
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srcsa.sin6.sin6_flowinfo = htonl(0x0fffffff) & ip6->ip6_flow;
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#endif
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/* KAME hack: recover scopeid */
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in6_recoverscope(&srcsa.sin6, &ip6->ip6_src);
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bzero(&dstsa, sizeof(struct sockaddr_in6));
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dstsa.sin6.sin6_len = sizeof(struct sockaddr_in6);
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dstsa.sin6.sin6_family = AF_INET6;
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dstsa.sin6.sin6_port = uh->uh_dport;
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#if 0 /*XXX inbound flowinfo */
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dstsa.sin6.sin6_flowinfo = htonl(0x0fffffff) & ip6->ip6_flow;
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#endif
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/* KAME hack: recover scopeid */
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in6_recoverscope(&dstsa.sin6, &ip6->ip6_dst);
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break;
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#endif /* INET6 */
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}
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if (m->m_flags & (M_BCAST|M_MCAST)) {
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SIMPLEQ_HEAD(, inpcb) inpcblist;
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/*
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* Deliver a multicast or broadcast datagram to *all* sockets
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* for which the local and remote addresses and ports match
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* those of the incoming datagram. This allows more than
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* one process to receive multi/broadcasts on the same port.
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* (This really ought to be done for unicast datagrams as
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* well, but that would cause problems with existing
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* 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
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* 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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*/
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|
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/*
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* Locate pcb(s) for datagram.
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* (Algorithm copied from raw_intr().)
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*/
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SIMPLEQ_INIT(&inpcblist);
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rw_enter_write(&udbtable.inpt_notify);
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mtx_enter(&udbtable.inpt_mtx);
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TAILQ_FOREACH(inp, &udbtable.inpt_queue, inp_queue) {
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if (inp->inp_socket->so_rcv.sb_state & SS_CANTRCVMORE)
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continue;
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#ifdef INET6
|
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/* don't accept it if AF does not match */
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if (ip6 && !(inp->inp_flags & INP_IPV6))
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continue;
|
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if (!ip6 && (inp->inp_flags & INP_IPV6))
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continue;
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#endif
|
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if (rtable_l2(inp->inp_rtableid) !=
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rtable_l2(m->m_pkthdr.ph_rtableid))
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continue;
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if (inp->inp_lport != uh->uh_dport)
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continue;
|
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#ifdef INET6
|
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if (ip6) {
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if (inp->inp_ip6_minhlim &&
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inp->inp_ip6_minhlim > ip6->ip6_hlim)
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continue;
|
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if (!IN6_IS_ADDR_UNSPECIFIED(&inp->inp_laddr6))
|
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if (!IN6_ARE_ADDR_EQUAL(
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&inp->inp_laddr6, &ip6->ip6_dst))
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continue;
|
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} else
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#endif /* INET6 */
|
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{
|
|
if (inp->inp_ip_minttl &&
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inp->inp_ip_minttl > ip->ip_ttl)
|
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continue;
|
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|
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if (inp->inp_laddr.s_addr != INADDR_ANY) {
|
|
if (inp->inp_laddr.s_addr !=
|
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ip->ip_dst.s_addr)
|
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continue;
|
|
}
|
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}
|
|
#ifdef INET6
|
|
if (ip6) {
|
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if (!IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6))
|
|
if (!IN6_ARE_ADDR_EQUAL(
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&inp->inp_faddr6, &ip6->ip6_src) ||
|
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inp->inp_fport != uh->uh_sport)
|
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continue;
|
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} else
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#endif /* INET6 */
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
if (inp->inp_faddr.s_addr !=
|
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ip->ip_src.s_addr ||
|
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inp->inp_fport != uh->uh_sport)
|
|
continue;
|
|
}
|
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|
|
in_pcbref(inp);
|
|
SIMPLEQ_INSERT_TAIL(&inpcblist, inp, inp_notify);
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|
|
|
/*
|
|
* Don't look for additional matches if this one does
|
|
* not have either the SO_REUSEPORT or SO_REUSEADDR
|
|
* socket options set. This heuristic avoids searching
|
|
* through all pcbs in the common case of a non-shared
|
|
* port. It assumes that an application will never
|
|
* clear these options after setting them.
|
|
*/
|
|
if ((inp->inp_socket->so_options & (SO_REUSEPORT |
|
|
SO_REUSEADDR)) == 0)
|
|
break;
|
|
}
|
|
mtx_leave(&udbtable.inpt_mtx);
|
|
|
|
if (SIMPLEQ_EMPTY(&inpcblist)) {
|
|
rw_exit_write(&udbtable.inpt_notify);
|
|
|
|
/*
|
|
* No matching pcb found; discard datagram.
|
|
* (No need to send an ICMP Port Unreachable
|
|
* for a broadcast or multicast datgram.)
|
|
*/
|
|
udpstat_inc(udps_noportbcast);
|
|
goto bad;
|
|
}
|
|
|
|
while ((inp = SIMPLEQ_FIRST(&inpcblist)) != NULL) {
|
|
struct mbuf *n;
|
|
|
|
SIMPLEQ_REMOVE_HEAD(&inpcblist, inp_notify);
|
|
if (SIMPLEQ_EMPTY(&inpcblist))
|
|
n = m;
|
|
else
|
|
n = m_copym(m, 0, M_COPYALL, M_NOWAIT);
|
|
if (n != NULL) {
|
|
udp_sbappend(inp, n, ip, ip6, iphlen, uh,
|
|
&srcsa.sa, 0);
|
|
}
|
|
in_pcbunref(inp);
|
|
}
|
|
rw_exit_write(&udbtable.inpt_notify);
|
|
|
|
return IPPROTO_DONE;
|
|
}
|
|
/*
|
|
* Locate pcb for datagram.
|
|
*/
|
|
#if NPF > 0
|
|
inp = pf_inp_lookup(m);
|
|
#endif
|
|
if (inp == NULL) {
|
|
#ifdef INET6
|
|
if (ip6)
|
|
inp = in6_pcblookup(&udbtable, &ip6->ip6_src,
|
|
uh->uh_sport, &ip6->ip6_dst, uh->uh_dport,
|
|
m->m_pkthdr.ph_rtableid);
|
|
else
|
|
#endif /* INET6 */
|
|
inp = in_pcblookup(&udbtable, ip->ip_src, uh->uh_sport,
|
|
ip->ip_dst, uh->uh_dport, m->m_pkthdr.ph_rtableid);
|
|
}
|
|
if (inp == NULL) {
|
|
udpstat_inc(udps_pcbhashmiss);
|
|
#ifdef INET6
|
|
if (ip6) {
|
|
inp = in6_pcblookup_listen(&udbtable, &ip6->ip6_dst,
|
|
uh->uh_dport, m, m->m_pkthdr.ph_rtableid);
|
|
} else
|
|
#endif /* INET6 */
|
|
inp = in_pcblookup_listen(&udbtable, ip->ip_dst,
|
|
uh->uh_dport, m, m->m_pkthdr.ph_rtableid);
|
|
}
|
|
|
|
#ifdef IPSEC
|
|
if (ipsec_in_use) {
|
|
struct m_tag *mtag;
|
|
struct tdb_ident *tdbi;
|
|
struct tdb *tdb;
|
|
int error;
|
|
|
|
mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL);
|
|
if (mtag != NULL) {
|
|
tdbi = (struct tdb_ident *)(mtag + 1);
|
|
tdb = gettdb(tdbi->rdomain, tdbi->spi,
|
|
&tdbi->dst, tdbi->proto);
|
|
} else
|
|
tdb = NULL;
|
|
error = ipsp_spd_lookup(m, af, iphlen, IPSP_DIRECTION_IN,
|
|
tdb, inp ? inp->inp_seclevel : NULL, NULL, NULL);
|
|
if (error) {
|
|
udpstat_inc(udps_nosec);
|
|
tdb_unref(tdb);
|
|
goto bad;
|
|
}
|
|
/* create ipsec options, id is not modified after creation */
|
|
if (tdb && tdb->tdb_ids)
|
|
ipsecflowinfo = tdb->tdb_ids->id_flow;
|
|
tdb_unref(tdb);
|
|
}
|
|
#endif /*IPSEC */
|
|
|
|
if (inp == NULL) {
|
|
udpstat_inc(udps_noport);
|
|
if (m->m_flags & (M_BCAST | M_MCAST)) {
|
|
udpstat_inc(udps_noportbcast);
|
|
goto bad;
|
|
}
|
|
#ifdef INET6
|
|
if (ip6) {
|
|
uh->uh_sum = savesum;
|
|
icmp6_error(m, ICMP6_DST_UNREACH,
|
|
ICMP6_DST_UNREACH_NOPORT,0);
|
|
} else
|
|
#endif /* INET6 */
|
|
{
|
|
*ip = save_ip;
|
|
uh->uh_sum = savesum;
|
|
icmp_error(m, ICMP_UNREACH, ICMP_UNREACH_PORT,
|
|
0, 0);
|
|
}
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
KASSERT(sotoinpcb(inp->inp_socket) == inp);
|
|
soassertlocked(inp->inp_socket);
|
|
|
|
#ifdef INET6
|
|
if (ip6 && inp->inp_ip6_minhlim &&
|
|
inp->inp_ip6_minhlim > ip6->ip6_hlim) {
|
|
goto bad;
|
|
} else
|
|
#endif
|
|
if (ip && inp->inp_ip_minttl &&
|
|
inp->inp_ip_minttl > ip->ip_ttl) {
|
|
goto bad;
|
|
}
|
|
|
|
#if NPF > 0
|
|
if (inp->inp_socket->so_state & SS_ISCONNECTED)
|
|
pf_inp_link(m, inp);
|
|
#endif
|
|
|
|
#ifdef PIPEX
|
|
if (pipex_enable && inp->inp_pipex) {
|
|
struct pipex_session *session;
|
|
int off = iphlen + sizeof(struct udphdr);
|
|
|
|
if ((session = pipex_l2tp_lookup_session(m, off)) != NULL) {
|
|
m = *mp = pipex_l2tp_input(m, off, session,
|
|
ipsecflowinfo);
|
|
pipex_rele_session(session);
|
|
if (m == NULL) {
|
|
in_pcbunref(inp);
|
|
return IPPROTO_DONE;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
udp_sbappend(inp, m, ip, ip6, iphlen, uh, &srcsa.sa, ipsecflowinfo);
|
|
in_pcbunref(inp);
|
|
return IPPROTO_DONE;
|
|
bad:
|
|
m_freem(m);
|
|
in_pcbunref(inp);
|
|
return IPPROTO_DONE;
|
|
}
|
|
|
|
void
|
|
udp_sbappend(struct inpcb *inp, struct mbuf *m, struct ip *ip,
|
|
struct ip6_hdr *ip6, int hlen, struct udphdr *uh,
|
|
struct sockaddr *srcaddr, u_int32_t ipsecflowinfo)
|
|
{
|
|
struct socket *so = inp->inp_socket;
|
|
struct mbuf *opts = NULL;
|
|
|
|
hlen += sizeof(*uh);
|
|
|
|
if (inp->inp_upcall != NULL) {
|
|
m = (*inp->inp_upcall)(inp->inp_upcall_arg, m,
|
|
ip, ip6, uh, hlen);
|
|
if (m == NULL)
|
|
return;
|
|
}
|
|
|
|
#ifdef INET6
|
|
if (ip6 && (inp->inp_flags & IN6P_CONTROLOPTS ||
|
|
so->so_options & SO_TIMESTAMP))
|
|
ip6_savecontrol(inp, m, &opts);
|
|
#endif /* INET6 */
|
|
if (ip && (inp->inp_flags & INP_CONTROLOPTS ||
|
|
so->so_options & SO_TIMESTAMP))
|
|
ip_savecontrol(inp, &opts, ip, m);
|
|
#ifdef INET6
|
|
if (ip6 && (inp->inp_flags & IN6P_RECVDSTPORT)) {
|
|
struct mbuf **mp = &opts;
|
|
|
|
while (*mp)
|
|
mp = &(*mp)->m_next;
|
|
*mp = sbcreatecontrol((caddr_t)&uh->uh_dport, sizeof(u_int16_t),
|
|
IPV6_RECVDSTPORT, IPPROTO_IPV6);
|
|
}
|
|
#endif /* INET6 */
|
|
if (ip && (inp->inp_flags & INP_RECVDSTPORT)) {
|
|
struct mbuf **mp = &opts;
|
|
|
|
while (*mp)
|
|
mp = &(*mp)->m_next;
|
|
*mp = sbcreatecontrol((caddr_t)&uh->uh_dport, sizeof(u_int16_t),
|
|
IP_RECVDSTPORT, IPPROTO_IP);
|
|
}
|
|
#ifdef IPSEC
|
|
if (ipsecflowinfo && (inp->inp_flags & INP_IPSECFLOWINFO)) {
|
|
struct mbuf **mp = &opts;
|
|
|
|
while (*mp)
|
|
mp = &(*mp)->m_next;
|
|
*mp = sbcreatecontrol((caddr_t)&ipsecflowinfo,
|
|
sizeof(u_int32_t), IP_IPSECFLOWINFO, IPPROTO_IP);
|
|
}
|
|
#endif
|
|
m_adj(m, hlen);
|
|
|
|
mtx_enter(&inp->inp_mtx);
|
|
if (sbappendaddr(so, &so->so_rcv, srcaddr, m, opts) == 0) {
|
|
mtx_leave(&inp->inp_mtx);
|
|
udpstat_inc(udps_fullsock);
|
|
m_freem(m);
|
|
m_freem(opts);
|
|
return;
|
|
}
|
|
mtx_leave(&inp->inp_mtx);
|
|
|
|
sorwakeup(so);
|
|
}
|
|
|
|
/*
|
|
* Notify a udp user of an asynchronous error;
|
|
* just wake up so that he can collect error status.
|
|
*/
|
|
void
|
|
udp_notify(struct inpcb *inp, int errno)
|
|
{
|
|
inp->inp_socket->so_error = errno;
|
|
sorwakeup(inp->inp_socket);
|
|
sowwakeup(inp->inp_socket);
|
|
}
|
|
|
|
#ifdef INET6
|
|
void
|
|
udp6_ctlinput(int cmd, struct sockaddr *sa, u_int rdomain, void *d)
|
|
{
|
|
struct udphdr uh;
|
|
struct sockaddr_in6 sa6;
|
|
struct ip6_hdr *ip6;
|
|
struct mbuf *m;
|
|
int off;
|
|
void *cmdarg;
|
|
struct ip6ctlparam *ip6cp = NULL;
|
|
struct udp_portonly {
|
|
u_int16_t uh_sport;
|
|
u_int16_t uh_dport;
|
|
} *uhp;
|
|
struct inpcb *inp;
|
|
void (*notify)(struct inpcb *, int) = udp_notify;
|
|
|
|
if (sa == NULL)
|
|
return;
|
|
if (sa->sa_family != AF_INET6 ||
|
|
sa->sa_len != sizeof(struct sockaddr_in6))
|
|
return;
|
|
|
|
if ((unsigned)cmd >= PRC_NCMDS)
|
|
return;
|
|
if (PRC_IS_REDIRECT(cmd))
|
|
notify = in_rtchange, d = NULL;
|
|
else if (cmd == PRC_HOSTDEAD)
|
|
d = NULL;
|
|
else if (cmd == PRC_MSGSIZE)
|
|
; /* special code is present, see below */
|
|
else if (inet6ctlerrmap[cmd] == 0)
|
|
return;
|
|
|
|
/* if the parameter is from icmp6, decode it. */
|
|
if (d != NULL) {
|
|
ip6cp = (struct ip6ctlparam *)d;
|
|
m = ip6cp->ip6c_m;
|
|
ip6 = ip6cp->ip6c_ip6;
|
|
off = ip6cp->ip6c_off;
|
|
cmdarg = ip6cp->ip6c_cmdarg;
|
|
} else {
|
|
m = NULL;
|
|
ip6 = NULL;
|
|
cmdarg = NULL;
|
|
/* XXX: translate addresses into internal form */
|
|
sa6 = *satosin6(sa);
|
|
if (in6_embedscope(&sa6.sin6_addr, &sa6, NULL, NULL)) {
|
|
/* should be impossible */
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (ip6cp && ip6cp->ip6c_finaldst) {
|
|
bzero(&sa6, sizeof(sa6));
|
|
sa6.sin6_family = AF_INET6;
|
|
sa6.sin6_len = sizeof(sa6);
|
|
sa6.sin6_addr = *ip6cp->ip6c_finaldst;
|
|
/* XXX: assuming M is valid in this case */
|
|
sa6.sin6_scope_id = in6_addr2scopeid(m->m_pkthdr.ph_ifidx,
|
|
ip6cp->ip6c_finaldst);
|
|
if (in6_embedscope(ip6cp->ip6c_finaldst, &sa6, NULL, NULL)) {
|
|
/* should be impossible */
|
|
return;
|
|
}
|
|
} else {
|
|
/* XXX: translate addresses into internal form */
|
|
sa6 = *satosin6(sa);
|
|
if (in6_embedscope(&sa6.sin6_addr, &sa6, NULL, NULL)) {
|
|
/* should be impossible */
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (ip6) {
|
|
/*
|
|
* XXX: We assume that when IPV6 is non NULL,
|
|
* M and OFF are valid.
|
|
*/
|
|
struct sockaddr_in6 sa6_src;
|
|
|
|
/* check if we can safely examine src and dst ports */
|
|
if (m->m_pkthdr.len < off + sizeof(*uhp))
|
|
return;
|
|
|
|
bzero(&uh, sizeof(uh));
|
|
m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
|
|
|
|
bzero(&sa6_src, sizeof(sa6_src));
|
|
sa6_src.sin6_family = AF_INET6;
|
|
sa6_src.sin6_len = sizeof(sa6_src);
|
|
sa6_src.sin6_addr = ip6->ip6_src;
|
|
sa6_src.sin6_scope_id = in6_addr2scopeid(m->m_pkthdr.ph_ifidx,
|
|
&ip6->ip6_src);
|
|
if (in6_embedscope(&sa6_src.sin6_addr, &sa6_src, NULL, NULL)) {
|
|
/* should be impossible */
|
|
return;
|
|
}
|
|
|
|
if (cmd == PRC_MSGSIZE) {
|
|
/*
|
|
* Check to see if we have a valid UDP socket
|
|
* corresponding to the address in the ICMPv6 message
|
|
* payload.
|
|
*/
|
|
inp = in6_pcblookup(&udbtable, &sa6.sin6_addr,
|
|
uh.uh_dport, &sa6_src.sin6_addr, uh.uh_sport,
|
|
rdomain);
|
|
#if 0
|
|
/*
|
|
* As the use of sendto(2) is fairly popular,
|
|
* we may want to allow non-connected pcb too.
|
|
* But it could be too weak against attacks...
|
|
* We should at least check if the local address (= s)
|
|
* is really ours.
|
|
*/
|
|
if (inp == NULL) {
|
|
inp = in6_pcblookup_listen(&udbtable,
|
|
&sa6_src.sin6_addr, uh.uh_sport, NULL,
|
|
rdomain))
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Depending on the value of "valid" and routing table
|
|
* size (mtudisc_{hi,lo}wat), we will:
|
|
* - recalculate the new MTU and create the
|
|
* corresponding routing entry, or
|
|
* - ignore the MTU change notification.
|
|
*/
|
|
icmp6_mtudisc_update((struct ip6ctlparam *)d,
|
|
inp != NULL);
|
|
in_pcbunref(inp);
|
|
|
|
/*
|
|
* regardless of if we called icmp6_mtudisc_update(),
|
|
* we need to call in6_pcbnotify(), to notify path
|
|
* MTU change to the userland (2292bis-02), because
|
|
* some unconnected sockets may share the same
|
|
* destination and want to know the path MTU.
|
|
*/
|
|
}
|
|
|
|
in6_pcbnotify(&udbtable, &sa6, uh.uh_dport,
|
|
&sa6_src, uh.uh_sport, rdomain, cmd, cmdarg, notify);
|
|
} else {
|
|
in6_pcbnotify(&udbtable, &sa6, 0,
|
|
&sa6_any, 0, rdomain, cmd, cmdarg, notify);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
udp_ctlinput(int cmd, struct sockaddr *sa, u_int rdomain, void *v)
|
|
{
|
|
struct ip *ip = v;
|
|
struct udphdr *uhp;
|
|
struct in_addr faddr;
|
|
struct inpcb *inp;
|
|
void (*notify)(struct inpcb *, int) = udp_notify;
|
|
int errno;
|
|
|
|
if (sa == NULL)
|
|
return;
|
|
if (sa->sa_family != AF_INET ||
|
|
sa->sa_len != sizeof(struct sockaddr_in))
|
|
return;
|
|
faddr = satosin(sa)->sin_addr;
|
|
if (faddr.s_addr == INADDR_ANY)
|
|
return;
|
|
|
|
if ((unsigned)cmd >= PRC_NCMDS)
|
|
return;
|
|
errno = inetctlerrmap[cmd];
|
|
if (PRC_IS_REDIRECT(cmd))
|
|
notify = in_rtchange, ip = 0;
|
|
else if (cmd == PRC_HOSTDEAD)
|
|
ip = 0;
|
|
else if (errno == 0)
|
|
return;
|
|
if (ip) {
|
|
uhp = (struct udphdr *)((caddr_t)ip + (ip->ip_hl << 2));
|
|
|
|
#ifdef IPSEC
|
|
/* PMTU discovery for udpencap */
|
|
if (cmd == PRC_MSGSIZE && ip_mtudisc && udpencap_enable &&
|
|
udpencap_port && uhp->uh_sport == htons(udpencap_port)) {
|
|
udpencap_ctlinput(cmd, sa, rdomain, v);
|
|
return;
|
|
}
|
|
#endif
|
|
inp = in_pcblookup(&udbtable,
|
|
ip->ip_dst, uhp->uh_dport, ip->ip_src, uhp->uh_sport,
|
|
rdomain);
|
|
if (inp != NULL)
|
|
notify(inp, errno);
|
|
in_pcbunref(inp);
|
|
} else
|
|
in_pcbnotifyall(&udbtable, sa, rdomain, errno, notify);
|
|
}
|
|
|
|
int
|
|
udp_output(struct inpcb *inp, struct mbuf *m, struct mbuf *addr,
|
|
struct mbuf *control)
|
|
{
|
|
struct sockaddr_in *sin = NULL;
|
|
struct udpiphdr *ui;
|
|
u_int32_t ipsecflowinfo = 0;
|
|
struct sockaddr_in src_sin;
|
|
int len = m->m_pkthdr.len;
|
|
struct in_addr laddr;
|
|
int error = 0;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if ((inp->inp_flags & INP_IPV6) != 0)
|
|
panic("IPv6 inpcb to %s", __func__);
|
|
#endif
|
|
|
|
/*
|
|
* Compute the packet length of the IP header, and
|
|
* punt if the length looks bogus.
|
|
*/
|
|
if ((len + sizeof(struct udpiphdr)) > IP_MAXPACKET) {
|
|
error = EMSGSIZE;
|
|
goto release;
|
|
}
|
|
|
|
memset(&src_sin, 0, sizeof(src_sin));
|
|
|
|
if (control) {
|
|
u_int clen;
|
|
struct cmsghdr *cm;
|
|
caddr_t cmsgs;
|
|
|
|
/*
|
|
* XXX: Currently, we assume all the optional information is
|
|
* stored in a single mbuf.
|
|
*/
|
|
if (control->m_next) {
|
|
error = EINVAL;
|
|
goto release;
|
|
}
|
|
|
|
clen = control->m_len;
|
|
cmsgs = mtod(control, caddr_t);
|
|
do {
|
|
if (clen < CMSG_LEN(0)) {
|
|
error = EINVAL;
|
|
goto release;
|
|
}
|
|
cm = (struct cmsghdr *)cmsgs;
|
|
if (cm->cmsg_len < CMSG_LEN(0) ||
|
|
CMSG_ALIGN(cm->cmsg_len) > clen) {
|
|
error = EINVAL;
|
|
goto release;
|
|
}
|
|
#ifdef IPSEC
|
|
if ((inp->inp_flags & INP_IPSECFLOWINFO) != 0 &&
|
|
cm->cmsg_len == CMSG_LEN(sizeof(ipsecflowinfo)) &&
|
|
cm->cmsg_level == IPPROTO_IP &&
|
|
cm->cmsg_type == IP_IPSECFLOWINFO) {
|
|
ipsecflowinfo = *(u_int32_t *)CMSG_DATA(cm);
|
|
} else
|
|
#endif
|
|
if (cm->cmsg_len == CMSG_LEN(sizeof(struct in_addr)) &&
|
|
cm->cmsg_level == IPPROTO_IP &&
|
|
cm->cmsg_type == IP_SENDSRCADDR) {
|
|
memcpy(&src_sin.sin_addr, CMSG_DATA(cm),
|
|
sizeof(struct in_addr));
|
|
src_sin.sin_family = AF_INET;
|
|
src_sin.sin_len = sizeof(src_sin);
|
|
/* no check on reuse when sin->sin_port == 0 */
|
|
if ((error = in_pcbaddrisavail(inp, &src_sin,
|
|
0, curproc)))
|
|
goto release;
|
|
}
|
|
clen -= CMSG_ALIGN(cm->cmsg_len);
|
|
cmsgs += CMSG_ALIGN(cm->cmsg_len);
|
|
} while (clen);
|
|
}
|
|
|
|
if (addr) {
|
|
if ((error = in_nam2sin(addr, &sin)))
|
|
goto release;
|
|
if (sin->sin_port == 0) {
|
|
error = EADDRNOTAVAIL;
|
|
goto release;
|
|
}
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY) {
|
|
error = EISCONN;
|
|
goto release;
|
|
}
|
|
error = in_pcbselsrc(&laddr, sin, inp);
|
|
if (error)
|
|
goto release;
|
|
|
|
if (inp->inp_lport == 0) {
|
|
error = in_pcbbind(inp, NULL, curproc);
|
|
if (error)
|
|
goto release;
|
|
}
|
|
|
|
if (src_sin.sin_len > 0 &&
|
|
src_sin.sin_addr.s_addr != INADDR_ANY &&
|
|
src_sin.sin_addr.s_addr != inp->inp_laddr.s_addr) {
|
|
src_sin.sin_port = inp->inp_lport;
|
|
if (inp->inp_laddr.s_addr != INADDR_ANY &&
|
|
(error =
|
|
in_pcbaddrisavail(inp, &src_sin, 0, curproc)))
|
|
goto release;
|
|
laddr = src_sin.sin_addr;
|
|
}
|
|
} else {
|
|
if (inp->inp_faddr.s_addr == INADDR_ANY) {
|
|
error = ENOTCONN;
|
|
goto release;
|
|
}
|
|
laddr = inp->inp_laddr;
|
|
}
|
|
|
|
/*
|
|
* Calculate data length and get a mbuf
|
|
* for UDP and IP headers.
|
|
*/
|
|
M_PREPEND(m, sizeof(struct udpiphdr), M_DONTWAIT);
|
|
if (m == NULL) {
|
|
error = ENOBUFS;
|
|
goto bail;
|
|
}
|
|
|
|
/*
|
|
* Fill in mbuf with extended UDP header
|
|
* and addresses and length put into network format.
|
|
*/
|
|
ui = mtod(m, struct udpiphdr *);
|
|
bzero(ui->ui_x1, sizeof ui->ui_x1);
|
|
ui->ui_pr = IPPROTO_UDP;
|
|
ui->ui_len = htons((u_int16_t)len + sizeof (struct udphdr));
|
|
ui->ui_src = laddr;
|
|
ui->ui_dst = sin ? sin->sin_addr : inp->inp_faddr;
|
|
ui->ui_sport = inp->inp_lport;
|
|
ui->ui_dport = sin ? sin->sin_port : inp->inp_fport;
|
|
ui->ui_ulen = ui->ui_len;
|
|
((struct ip *)ui)->ip_len = htons(sizeof (struct udpiphdr) + len);
|
|
((struct ip *)ui)->ip_ttl = inp->inp_ip.ip_ttl;
|
|
((struct ip *)ui)->ip_tos = inp->inp_ip.ip_tos;
|
|
if (udpcksum)
|
|
m->m_pkthdr.csum_flags |= M_UDP_CSUM_OUT;
|
|
|
|
udpstat_inc(udps_opackets);
|
|
|
|
/* force routing table */
|
|
m->m_pkthdr.ph_rtableid = inp->inp_rtableid;
|
|
|
|
#if NPF > 0
|
|
if (inp->inp_socket->so_state & SS_ISCONNECTED)
|
|
pf_mbuf_link_inpcb(m, inp);
|
|
#endif
|
|
|
|
error = ip_output(m, inp->inp_options, &inp->inp_route,
|
|
(inp->inp_socket->so_options & SO_BROADCAST), inp->inp_moptions,
|
|
inp->inp_seclevel, ipsecflowinfo);
|
|
|
|
bail:
|
|
m_freem(control);
|
|
return (error);
|
|
|
|
release:
|
|
m_freem(m);
|
|
goto bail;
|
|
}
|
|
|
|
int
|
|
udp_attach(struct socket *so, int proto, int wait)
|
|
{
|
|
int error;
|
|
|
|
if (so->so_pcb != NULL)
|
|
return EINVAL;
|
|
|
|
if ((error = soreserve(so, udp_sendspace, udp_recvspace)))
|
|
return error;
|
|
|
|
NET_ASSERT_LOCKED();
|
|
if ((error = in_pcballoc(so, &udbtable, wait)))
|
|
return error;
|
|
#ifdef INET6
|
|
if (sotoinpcb(so)->inp_flags & INP_IPV6)
|
|
sotoinpcb(so)->inp_ipv6.ip6_hlim = ip6_defhlim;
|
|
else
|
|
#endif /* INET6 */
|
|
sotoinpcb(so)->inp_ip.ip_ttl = ip_defttl;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
udp_detach(struct socket *so)
|
|
{
|
|
struct inpcb *inp;
|
|
|
|
soassertlocked(so);
|
|
|
|
inp = sotoinpcb(so);
|
|
if (inp == NULL)
|
|
return (EINVAL);
|
|
|
|
in_pcbdetach(inp);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
udp_lock(struct socket *so)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
|
|
NET_ASSERT_LOCKED();
|
|
mtx_enter(&inp->inp_mtx);
|
|
}
|
|
|
|
void
|
|
udp_unlock(struct socket *so)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
|
|
NET_ASSERT_LOCKED();
|
|
mtx_leave(&inp->inp_mtx);
|
|
}
|
|
|
|
int
|
|
udp_bind(struct socket *so, struct mbuf *addr, struct proc *p)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
|
|
soassertlocked(so);
|
|
return in_pcbbind(inp, addr, p);
|
|
}
|
|
|
|
int
|
|
udp_connect(struct socket *so, struct mbuf *addr)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
int error;
|
|
|
|
soassertlocked(so);
|
|
|
|
#ifdef INET6
|
|
if (inp->inp_flags & INP_IPV6) {
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6))
|
|
return (EISCONN);
|
|
} else
|
|
#endif /* INET6 */
|
|
{
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY)
|
|
return (EISCONN);
|
|
}
|
|
error = in_pcbconnect(inp, addr);
|
|
if (error)
|
|
return (error);
|
|
|
|
soisconnected(so);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
udp_disconnect(struct socket *so)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
|
|
soassertlocked(so);
|
|
|
|
#ifdef INET6
|
|
if (inp->inp_flags & INP_IPV6) {
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&inp->inp_faddr6))
|
|
return (ENOTCONN);
|
|
} else
|
|
#endif /* INET6 */
|
|
{
|
|
if (inp->inp_faddr.s_addr == INADDR_ANY)
|
|
return (ENOTCONN);
|
|
}
|
|
in_pcbunset_laddr(inp);
|
|
in_pcbdisconnect(inp);
|
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
udp_shutdown(struct socket *so)
|
|
{
|
|
soassertlocked(so);
|
|
socantsendmore(so);
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
udp_send(struct socket *so, struct mbuf *m, struct mbuf *addr,
|
|
struct mbuf *control)
|
|
{
|
|
struct inpcb *inp = sotoinpcb(so);
|
|
int error;
|
|
|
|
soassertlocked(so);
|
|
|
|
#ifdef PIPEX
|
|
if (inp->inp_pipex) {
|
|
struct pipex_session *session;
|
|
|
|
if (addr != NULL)
|
|
session =
|
|
pipex_l2tp_userland_lookup_session(m,
|
|
mtod(addr, struct sockaddr *));
|
|
else
|
|
#ifdef INET6
|
|
if (inp->inp_flags & INP_IPV6)
|
|
session =
|
|
pipex_l2tp_userland_lookup_session_ipv6(
|
|
m, inp->inp_faddr6);
|
|
else
|
|
#endif
|
|
session =
|
|
pipex_l2tp_userland_lookup_session_ipv4(
|
|
m, inp->inp_faddr);
|
|
if (session != NULL) {
|
|
m = pipex_l2tp_userland_output(m, session);
|
|
pipex_rele_session(session);
|
|
|
|
if (m == NULL) {
|
|
m_freem(control);
|
|
return (ENOMEM);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef INET6
|
|
if (inp->inp_flags & INP_IPV6)
|
|
error = udp6_output(inp, m, addr, control);
|
|
else
|
|
#endif
|
|
error = udp_output(inp, m, addr, control);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Sysctl for udp variables.
|
|
*/
|
|
int
|
|
udp_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp,
|
|
size_t newlen)
|
|
{
|
|
int error;
|
|
|
|
/* All sysctl names at this level are terminal. */
|
|
if (namelen != 1)
|
|
return (ENOTDIR);
|
|
|
|
switch (name[0]) {
|
|
case UDPCTL_BADDYNAMIC:
|
|
NET_LOCK();
|
|
error = sysctl_struct(oldp, oldlenp, newp, newlen,
|
|
baddynamicports.udp, sizeof(baddynamicports.udp));
|
|
NET_UNLOCK();
|
|
return (error);
|
|
|
|
case UDPCTL_ROOTONLY:
|
|
if (newp && securelevel > 0)
|
|
return (EPERM);
|
|
NET_LOCK();
|
|
error = sysctl_struct(oldp, oldlenp, newp, newlen,
|
|
rootonlyports.udp, sizeof(rootonlyports.udp));
|
|
NET_UNLOCK();
|
|
return (error);
|
|
|
|
case UDPCTL_STATS:
|
|
if (newp != NULL)
|
|
return (EPERM);
|
|
|
|
return (udp_sysctl_udpstat(oldp, oldlenp, newp));
|
|
|
|
default:
|
|
NET_LOCK();
|
|
error = sysctl_bounded_arr(udpctl_vars, nitems(udpctl_vars),
|
|
name, namelen, oldp, oldlenp, newp, newlen);
|
|
NET_UNLOCK();
|
|
return (error);
|
|
}
|
|
/* NOTREACHED */
|
|
}
|
|
|
|
int
|
|
udp_sysctl_udpstat(void *oldp, size_t *oldlenp, void *newp)
|
|
{
|
|
uint64_t counters[udps_ncounters];
|
|
struct udpstat udpstat;
|
|
u_long *words = (u_long *)&udpstat;
|
|
int i;
|
|
|
|
CTASSERT(sizeof(udpstat) == (nitems(counters) * sizeof(u_long)));
|
|
memset(&udpstat, 0, sizeof udpstat);
|
|
counters_read(udpcounters, counters, nitems(counters), NULL);
|
|
|
|
for (i = 0; i < nitems(counters); i++)
|
|
words[i] = (u_long)counters[i];
|
|
|
|
return (sysctl_rdstruct(oldp, oldlenp, newp,
|
|
&udpstat, sizeof(udpstat)));
|
|
}
|