| 1 |
27 |
unneback |
//==========================================================================
|
| 2 |
|
|
//
|
| 3 |
|
|
// src/sys/netinet6/udp6_usrreq.c
|
| 4 |
|
|
//
|
| 5 |
|
|
//==========================================================================
|
| 6 |
|
|
//####BSDCOPYRIGHTBEGIN####
|
| 7 |
|
|
//
|
| 8 |
|
|
// -------------------------------------------
|
| 9 |
|
|
//
|
| 10 |
|
|
// Portions of this software may have been derived from OpenBSD,
|
| 11 |
|
|
// FreeBSD or other sources, and are covered by the appropriate
|
| 12 |
|
|
// copyright disclaimers included herein.
|
| 13 |
|
|
//
|
| 14 |
|
|
// Portions created by Red Hat are
|
| 15 |
|
|
// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
|
| 16 |
|
|
//
|
| 17 |
|
|
// -------------------------------------------
|
| 18 |
|
|
//
|
| 19 |
|
|
//####BSDCOPYRIGHTEND####
|
| 20 |
|
|
//==========================================================================
|
| 21 |
|
|
|
| 22 |
|
|
/* $FreeBSD: src/sys/netinet6/udp6_usrreq.c,v 1.6.2.6 2001/07/29 19:32:40 ume Exp $ */
|
| 23 |
|
|
/* $KAME: udp6_usrreq.c,v 1.43 2001/11/12 05:04:16 jinmei Exp $ */
|
| 24 |
|
|
|
| 25 |
|
|
/*
|
| 26 |
|
|
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
|
| 27 |
|
|
* All rights reserved.
|
| 28 |
|
|
*
|
| 29 |
|
|
* Redistribution and use in source and binary forms, with or without
|
| 30 |
|
|
* modification, are permitted provided that the following conditions
|
| 31 |
|
|
* are met:
|
| 32 |
|
|
* 1. Redistributions of source code must retain the above copyright
|
| 33 |
|
|
* notice, this list of conditions and the following disclaimer.
|
| 34 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
| 35 |
|
|
* notice, this list of conditions and the following disclaimer in the
|
| 36 |
|
|
* documentation and/or other materials provided with the distribution.
|
| 37 |
|
|
* 3. Neither the name of the project nor the names of its contributors
|
| 38 |
|
|
* may be used to endorse or promote products derived from this software
|
| 39 |
|
|
* without specific prior written permission.
|
| 40 |
|
|
*
|
| 41 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
|
| 42 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 43 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 44 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
|
| 45 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 46 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 47 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 48 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 49 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 50 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 51 |
|
|
* SUCH DAMAGE.
|
| 52 |
|
|
*/
|
| 53 |
|
|
|
| 54 |
|
|
/*
|
| 55 |
|
|
* Copyright (c) 1982, 1986, 1989, 1993
|
| 56 |
|
|
* The Regents of the University of California. All rights reserved.
|
| 57 |
|
|
*
|
| 58 |
|
|
* Redistribution and use in source and binary forms, with or without
|
| 59 |
|
|
* modification, are permitted provided that the following conditions
|
| 60 |
|
|
* are met:
|
| 61 |
|
|
* 1. Redistributions of source code must retain the above copyright
|
| 62 |
|
|
* notice, this list of conditions and the following disclaimer.
|
| 63 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
| 64 |
|
|
* notice, this list of conditions and the following disclaimer in the
|
| 65 |
|
|
* documentation and/or other materials provided with the distribution.
|
| 66 |
|
|
* 3. All advertising materials mentioning features or use of this software
|
| 67 |
|
|
* must display the following acknowledgement:
|
| 68 |
|
|
* This product includes software developed by the University of
|
| 69 |
|
|
* California, Berkeley and its contributors.
|
| 70 |
|
|
* 4. Neither the name of the University nor the names of its contributors
|
| 71 |
|
|
* may be used to endorse or promote products derived from this software
|
| 72 |
|
|
* without specific prior written permission.
|
| 73 |
|
|
*
|
| 74 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
| 75 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 76 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 77 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
| 78 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 79 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 80 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 81 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 82 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 83 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 84 |
|
|
* SUCH DAMAGE.
|
| 85 |
|
|
*
|
| 86 |
|
|
* @(#)udp_var.h 8.1 (Berkeley) 6/10/93
|
| 87 |
|
|
*/
|
| 88 |
|
|
|
| 89 |
|
|
#include <sys/param.h>
|
| 90 |
|
|
#include <sys/mbuf.h>
|
| 91 |
|
|
#include <sys/protosw.h>
|
| 92 |
|
|
#include <sys/socket.h>
|
| 93 |
|
|
#include <sys/socketvar.h>
|
| 94 |
|
|
#include <sys/errno.h>
|
| 95 |
|
|
|
| 96 |
|
|
#include <net/if.h>
|
| 97 |
|
|
#include <net/route.h>
|
| 98 |
|
|
#include <net/if_types.h>
|
| 99 |
|
|
|
| 100 |
|
|
#include <netinet/in.h>
|
| 101 |
|
|
#include <netinet/in_systm.h>
|
| 102 |
|
|
#include <netinet/ip.h>
|
| 103 |
|
|
#include <netinet/in_pcb.h>
|
| 104 |
|
|
#include <netinet/in_var.h>
|
| 105 |
|
|
#include <netinet/ip_var.h>
|
| 106 |
|
|
#include <netinet/udp.h>
|
| 107 |
|
|
#include <netinet/udp_var.h>
|
| 108 |
|
|
#include <netinet/ip6.h>
|
| 109 |
|
|
#include <netinet6/ip6_var.h>
|
| 110 |
|
|
#include <netinet6/in6_pcb.h>
|
| 111 |
|
|
#include <netinet/icmp6.h>
|
| 112 |
|
|
#include <netinet6/udp6_var.h>
|
| 113 |
|
|
#include <netinet6/ip6protosw.h>
|
| 114 |
|
|
|
| 115 |
|
|
#ifdef IPSEC
|
| 116 |
|
|
#include <netinet6/ipsec.h>
|
| 117 |
|
|
#endif /* IPSEC */
|
| 118 |
|
|
|
| 119 |
|
|
/*
|
| 120 |
|
|
* UDP protocol inplementation.
|
| 121 |
|
|
* Per RFC 768, August, 1980.
|
| 122 |
|
|
*/
|
| 123 |
|
|
|
| 124 |
|
|
extern struct protosw inetsw[];
|
| 125 |
|
|
static int udp6_detach __P((struct socket *so));
|
| 126 |
|
|
|
| 127 |
|
|
int
|
| 128 |
|
|
udp6_input(mp, offp, proto)
|
| 129 |
|
|
struct mbuf **mp;
|
| 130 |
|
|
int *offp, proto;
|
| 131 |
|
|
{
|
| 132 |
|
|
struct mbuf *m = *mp;
|
| 133 |
|
|
register struct ip6_hdr *ip6;
|
| 134 |
|
|
register struct udphdr *uh;
|
| 135 |
|
|
register struct inpcb *in6p;
|
| 136 |
|
|
struct ip6_recvpktopts opts;
|
| 137 |
|
|
int off = *offp;
|
| 138 |
|
|
int plen, ulen;
|
| 139 |
|
|
struct sockaddr_in6 udp_in6;
|
| 140 |
|
|
|
| 141 |
|
|
bzero(&opts, sizeof(opts));
|
| 142 |
|
|
|
| 143 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 144 |
|
|
|
| 145 |
|
|
#if defined(NFAITH) && 0 < NFAITH
|
| 146 |
|
|
if (faithprefix(&ip6->ip6_dst)) {
|
| 147 |
|
|
/* XXX send icmp6 host/port unreach? */
|
| 148 |
|
|
m_freem(m);
|
| 149 |
|
|
return IPPROTO_DONE;
|
| 150 |
|
|
}
|
| 151 |
|
|
#endif
|
| 152 |
|
|
|
| 153 |
|
|
#ifndef PULLDOWN_TEST
|
| 154 |
|
|
IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE);
|
| 155 |
|
|
ip6 = mtod(m, struct ip6_hdr *);
|
| 156 |
|
|
uh = (struct udphdr *)((caddr_t)ip6 + off);
|
| 157 |
|
|
#else
|
| 158 |
|
|
IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh));
|
| 159 |
|
|
if (!uh)
|
| 160 |
|
|
return IPPROTO_DONE;
|
| 161 |
|
|
#endif
|
| 162 |
|
|
|
| 163 |
|
|
udpstat.udps_ipackets++;
|
| 164 |
|
|
|
| 165 |
|
|
plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6);
|
| 166 |
|
|
ulen = ntohs((u_short)uh->uh_ulen);
|
| 167 |
|
|
|
| 168 |
|
|
if (plen != ulen) {
|
| 169 |
|
|
udpstat.udps_badlen++;
|
| 170 |
|
|
goto bad;
|
| 171 |
|
|
}
|
| 172 |
|
|
|
| 173 |
|
|
/*
|
| 174 |
|
|
* Checksum extended UDP header and data.
|
| 175 |
|
|
*/
|
| 176 |
|
|
if (uh->uh_sum == 0)
|
| 177 |
|
|
udpstat.udps_nosum++;
|
| 178 |
|
|
else if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) {
|
| 179 |
|
|
udpstat.udps_badsum++;
|
| 180 |
|
|
goto bad;
|
| 181 |
|
|
}
|
| 182 |
|
|
|
| 183 |
|
|
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) {
|
| 184 |
|
|
struct inpcb *last;
|
| 185 |
|
|
|
| 186 |
|
|
/*
|
| 187 |
|
|
* Deliver a multicast datagram to all sockets
|
| 188 |
|
|
* for which the local and remote addresses and ports match
|
| 189 |
|
|
* those of the incoming datagram. This allows more than
|
| 190 |
|
|
* one process to receive multicasts on the same port.
|
| 191 |
|
|
* (This really ought to be done for unicast datagrams as
|
| 192 |
|
|
* well, but that would cause problems with existing
|
| 193 |
|
|
* applications that open both address-specific sockets and
|
| 194 |
|
|
* a wildcard socket listening to the same port -- they would
|
| 195 |
|
|
* end up receiving duplicates of every unicast datagram.
|
| 196 |
|
|
* Those applications open the multiple sockets to overcome an
|
| 197 |
|
|
* inadequacy of the UDP socket interface, but for backwards
|
| 198 |
|
|
* compatibility we avoid the problem here rather than
|
| 199 |
|
|
* fixing the interface. Maybe 4.5BSD will remedy this?)
|
| 200 |
|
|
*/
|
| 201 |
|
|
|
| 202 |
|
|
/*
|
| 203 |
|
|
* In a case that laddr should be set to the link-local
|
| 204 |
|
|
* address (this happens in RIPng), the multicast address
|
| 205 |
|
|
* specified in the received packet does not match with
|
| 206 |
|
|
* laddr. To cure this situation, the matching is relaxed
|
| 207 |
|
|
* if the receiving interface is the same as one specified
|
| 208 |
|
|
* in the socket and if the destination multicast address
|
| 209 |
|
|
* matches one of the multicast groups specified in the socket.
|
| 210 |
|
|
*/
|
| 211 |
|
|
|
| 212 |
|
|
/*
|
| 213 |
|
|
* Construct sockaddr format source address.
|
| 214 |
|
|
*/
|
| 215 |
|
|
init_sin6(&udp_in6, m); /* general init */
|
| 216 |
|
|
udp_in6.sin6_port = uh->uh_sport;
|
| 217 |
|
|
/*
|
| 218 |
|
|
* KAME note: traditionally we dropped udpiphdr from mbuf here.
|
| 219 |
|
|
* We need udphdr for IPsec processing so we do that later.
|
| 220 |
|
|
*/
|
| 221 |
|
|
|
| 222 |
|
|
/*
|
| 223 |
|
|
* Locate pcb(s) for datagram.
|
| 224 |
|
|
* (Algorithm copied from raw_intr().)
|
| 225 |
|
|
*/
|
| 226 |
|
|
last = NULL;
|
| 227 |
|
|
LIST_FOREACH(in6p, &udb, inp_list) {
|
| 228 |
|
|
if ((in6p->inp_vflag & INP_IPV6) == 0)
|
| 229 |
|
|
continue;
|
| 230 |
|
|
if (in6p->in6p_lport != uh->uh_dport)
|
| 231 |
|
|
continue;
|
| 232 |
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) {
|
| 233 |
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr,
|
| 234 |
|
|
&ip6->ip6_dst))
|
| 235 |
|
|
continue;
|
| 236 |
|
|
}
|
| 237 |
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) {
|
| 238 |
|
|
if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr,
|
| 239 |
|
|
&ip6->ip6_src) ||
|
| 240 |
|
|
in6p->in6p_fport != uh->uh_sport)
|
| 241 |
|
|
continue;
|
| 242 |
|
|
}
|
| 243 |
|
|
|
| 244 |
|
|
if (last != NULL) {
|
| 245 |
|
|
struct mbuf *n;
|
| 246 |
|
|
|
| 247 |
|
|
#ifdef IPSEC
|
| 248 |
|
|
/*
|
| 249 |
|
|
* Check AH/ESP integrity.
|
| 250 |
|
|
*/
|
| 251 |
|
|
if (ipsec6_in_reject_so(m, last->inp_socket))
|
| 252 |
|
|
ipsec6stat.in_polvio++;
|
| 253 |
|
|
/* do not inject data into pcb */
|
| 254 |
|
|
else
|
| 255 |
|
|
#endif /* IPSEC */
|
| 256 |
|
|
if ((n = m_copy(m, 0, M_COPYALL)) != NULL) {
|
| 257 |
|
|
/*
|
| 258 |
|
|
* KAME NOTE: do not
|
| 259 |
|
|
* m_copy(m, offset, ...) above.
|
| 260 |
|
|
* sbappendaddr() expects M_PKTHDR,
|
| 261 |
|
|
* and m_copy() will copy M_PKTHDR
|
| 262 |
|
|
* only if offset is 0.
|
| 263 |
|
|
*/
|
| 264 |
|
|
if (last->in6p_flags & IN6P_CONTROLOPTS
|
| 265 |
|
|
|| last->in6p_socket->so_options & SO_TIMESTAMP)
|
| 266 |
|
|
ip6_savecontrol(last, ip6, n,
|
| 267 |
|
|
&opts, NULL);
|
| 268 |
|
|
|
| 269 |
|
|
m_adj(n, off + sizeof(struct udphdr));
|
| 270 |
|
|
if (sbappendaddr(&last->in6p_socket->so_rcv,
|
| 271 |
|
|
(struct sockaddr *)&udp_in6,
|
| 272 |
|
|
n, opts.head) == 0) {
|
| 273 |
|
|
m_freem(n);
|
| 274 |
|
|
if (opts.head)
|
| 275 |
|
|
m_freem(opts.head);
|
| 276 |
|
|
udpstat.udps_fullsock++;
|
| 277 |
|
|
} else
|
| 278 |
|
|
sorwakeup(last->in6p_socket);
|
| 279 |
|
|
bzero(&opts, sizeof(opts));
|
| 280 |
|
|
}
|
| 281 |
|
|
}
|
| 282 |
|
|
last = in6p;
|
| 283 |
|
|
/*
|
| 284 |
|
|
* Don't look for additional matches if this one does
|
| 285 |
|
|
* not have either the SO_REUSEPORT or SO_REUSEADDR
|
| 286 |
|
|
* socket options set. This heuristic avoids searching
|
| 287 |
|
|
* through all pcbs in the common case of a non-shared
|
| 288 |
|
|
* port. It assumes that an application will never
|
| 289 |
|
|
* clear these options after setting them.
|
| 290 |
|
|
*/
|
| 291 |
|
|
if ((last->in6p_socket->so_options &
|
| 292 |
|
|
(SO_REUSEPORT|SO_REUSEADDR)) == 0)
|
| 293 |
|
|
break;
|
| 294 |
|
|
}
|
| 295 |
|
|
|
| 296 |
|
|
if (last == NULL) {
|
| 297 |
|
|
/*
|
| 298 |
|
|
* No matching pcb found; discard datagram.
|
| 299 |
|
|
* (No need to send an ICMP Port Unreachable
|
| 300 |
|
|
* for a broadcast or multicast datgram.)
|
| 301 |
|
|
*/
|
| 302 |
|
|
udpstat.udps_noport++;
|
| 303 |
|
|
udpstat.udps_noportmcast++;
|
| 304 |
|
|
goto bad;
|
| 305 |
|
|
}
|
| 306 |
|
|
#ifdef IPSEC
|
| 307 |
|
|
/*
|
| 308 |
|
|
* Check AH/ESP integrity.
|
| 309 |
|
|
*/
|
| 310 |
|
|
if (ipsec6_in_reject_so(m, last->inp_socket)) {
|
| 311 |
|
|
ipsec6stat.in_polvio++;
|
| 312 |
|
|
goto bad;
|
| 313 |
|
|
}
|
| 314 |
|
|
#endif /* IPSEC */
|
| 315 |
|
|
if (last->in6p_flags & IN6P_CONTROLOPTS
|
| 316 |
|
|
|| last->in6p_socket->so_options & SO_TIMESTAMP)
|
| 317 |
|
|
ip6_savecontrol(last, ip6, m, &opts, NULL);
|
| 318 |
|
|
|
| 319 |
|
|
m_adj(m, off + sizeof(struct udphdr));
|
| 320 |
|
|
if (sbappendaddr(&last->in6p_socket->so_rcv,
|
| 321 |
|
|
(struct sockaddr *)&udp_in6,
|
| 322 |
|
|
m, opts.head) == 0) {
|
| 323 |
|
|
udpstat.udps_fullsock++;
|
| 324 |
|
|
goto bad;
|
| 325 |
|
|
}
|
| 326 |
|
|
sorwakeup(last->in6p_socket);
|
| 327 |
|
|
return IPPROTO_DONE;
|
| 328 |
|
|
}
|
| 329 |
|
|
/*
|
| 330 |
|
|
* Locate pcb for datagram.
|
| 331 |
|
|
*/
|
| 332 |
|
|
in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport,
|
| 333 |
|
|
&ip6->ip6_dst, uh->uh_dport, 1,
|
| 334 |
|
|
m->m_pkthdr.rcvif);
|
| 335 |
|
|
if (in6p == 0) {
|
| 336 |
|
|
if (log_in_vain) {
|
| 337 |
|
|
char buf[INET6_ADDRSTRLEN];
|
| 338 |
|
|
|
| 339 |
|
|
strcpy(buf, ip6_sprintf(&ip6->ip6_dst));
|
| 340 |
|
|
log(LOG_INFO,
|
| 341 |
|
|
"Connection attempt to UDP %s:%d from %s:%d\n",
|
| 342 |
|
|
buf, ntohs(uh->uh_dport),
|
| 343 |
|
|
ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport));
|
| 344 |
|
|
}
|
| 345 |
|
|
udpstat.udps_noport++;
|
| 346 |
|
|
if (m->m_flags & M_MCAST) {
|
| 347 |
|
|
printf("UDP6: M_MCAST is set in a unicast packet.\n");
|
| 348 |
|
|
udpstat.udps_noportmcast++;
|
| 349 |
|
|
goto bad;
|
| 350 |
|
|
}
|
| 351 |
|
|
icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0);
|
| 352 |
|
|
return IPPROTO_DONE;
|
| 353 |
|
|
}
|
| 354 |
|
|
#ifdef IPSEC
|
| 355 |
|
|
/*
|
| 356 |
|
|
* Check AH/ESP integrity.
|
| 357 |
|
|
*/
|
| 358 |
|
|
if (ipsec6_in_reject_so(m, in6p->in6p_socket)) {
|
| 359 |
|
|
ipsec6stat.in_polvio++;
|
| 360 |
|
|
goto bad;
|
| 361 |
|
|
}
|
| 362 |
|
|
#endif /* IPSEC */
|
| 363 |
|
|
|
| 364 |
|
|
/*
|
| 365 |
|
|
* Construct sockaddr format source address.
|
| 366 |
|
|
* Stuff source address and datagram in user buffer.
|
| 367 |
|
|
*/
|
| 368 |
|
|
init_sin6(&udp_in6, m); /* general init */
|
| 369 |
|
|
udp_in6.sin6_port = uh->uh_sport;
|
| 370 |
|
|
if (in6p->in6p_flags & IN6P_CONTROLOPTS
|
| 371 |
|
|
|| in6p->in6p_socket->so_options & SO_TIMESTAMP)
|
| 372 |
|
|
ip6_savecontrol(in6p, ip6, m, &opts, NULL);
|
| 373 |
|
|
m_adj(m, off + sizeof(struct udphdr));
|
| 374 |
|
|
if (sbappendaddr(&in6p->in6p_socket->so_rcv,
|
| 375 |
|
|
(struct sockaddr *)&udp_in6,
|
| 376 |
|
|
m, opts.head) == 0) {
|
| 377 |
|
|
udpstat.udps_fullsock++;
|
| 378 |
|
|
goto bad;
|
| 379 |
|
|
}
|
| 380 |
|
|
sorwakeup(in6p->in6p_socket);
|
| 381 |
|
|
return IPPROTO_DONE;
|
| 382 |
|
|
bad:
|
| 383 |
|
|
if (m)
|
| 384 |
|
|
m_freem(m);
|
| 385 |
|
|
if (opts.head)
|
| 386 |
|
|
m_freem(opts.head);
|
| 387 |
|
|
return IPPROTO_DONE;
|
| 388 |
|
|
}
|
| 389 |
|
|
|
| 390 |
|
|
void
|
| 391 |
|
|
udp6_ctlinput(cmd, sa, d)
|
| 392 |
|
|
int cmd;
|
| 393 |
|
|
struct sockaddr *sa;
|
| 394 |
|
|
void *d;
|
| 395 |
|
|
{
|
| 396 |
|
|
struct udphdr uh;
|
| 397 |
|
|
struct ip6_hdr *ip6;
|
| 398 |
|
|
struct mbuf *m;
|
| 399 |
|
|
int off = 0;
|
| 400 |
|
|
struct ip6ctlparam *ip6cp = NULL;
|
| 401 |
|
|
const struct sockaddr_in6 *sa6_src = NULL;
|
| 402 |
|
|
void *cmdarg;
|
| 403 |
|
|
void (*notify) __P((struct inpcb *, int)) = udp_notify;
|
| 404 |
|
|
struct udp_portonly {
|
| 405 |
|
|
u_int16_t uh_sport;
|
| 406 |
|
|
u_int16_t uh_dport;
|
| 407 |
|
|
} *uhp;
|
| 408 |
|
|
|
| 409 |
|
|
if (sa->sa_family != AF_INET6 ||
|
| 410 |
|
|
sa->sa_len != sizeof(struct sockaddr_in6))
|
| 411 |
|
|
return;
|
| 412 |
|
|
|
| 413 |
|
|
if ((unsigned)cmd >= PRC_NCMDS)
|
| 414 |
|
|
return;
|
| 415 |
|
|
if (PRC_IS_REDIRECT(cmd))
|
| 416 |
|
|
notify = in6_rtchange, d = NULL;
|
| 417 |
|
|
else if (cmd == PRC_HOSTDEAD)
|
| 418 |
|
|
d = NULL;
|
| 419 |
|
|
else if (inet6ctlerrmap[cmd] == 0)
|
| 420 |
|
|
return;
|
| 421 |
|
|
|
| 422 |
|
|
/* if the parameter is from icmp6, decode it. */
|
| 423 |
|
|
if (d != NULL) {
|
| 424 |
|
|
ip6cp = (struct ip6ctlparam *)d;
|
| 425 |
|
|
m = ip6cp->ip6c_m;
|
| 426 |
|
|
ip6 = ip6cp->ip6c_ip6;
|
| 427 |
|
|
off = ip6cp->ip6c_off;
|
| 428 |
|
|
cmdarg = ip6cp->ip6c_cmdarg;
|
| 429 |
|
|
sa6_src = ip6cp->ip6c_src;
|
| 430 |
|
|
} else {
|
| 431 |
|
|
m = NULL;
|
| 432 |
|
|
ip6 = NULL;
|
| 433 |
|
|
cmdarg = NULL;
|
| 434 |
|
|
sa6_src = &sa6_any;
|
| 435 |
|
|
}
|
| 436 |
|
|
|
| 437 |
|
|
if (ip6) {
|
| 438 |
|
|
/*
|
| 439 |
|
|
* XXX: We assume that when IPV6 is non NULL,
|
| 440 |
|
|
* M and OFF are valid.
|
| 441 |
|
|
*/
|
| 442 |
|
|
|
| 443 |
|
|
/* check if we can safely examine src and dst ports */
|
| 444 |
|
|
if (m->m_pkthdr.len < off + sizeof(*uhp))
|
| 445 |
|
|
return;
|
| 446 |
|
|
|
| 447 |
|
|
bzero(&uh, sizeof(uh));
|
| 448 |
|
|
m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh);
|
| 449 |
|
|
|
| 450 |
|
|
(void) in6_pcbnotify(&udb, sa, uh.uh_dport,
|
| 451 |
|
|
(struct sockaddr *)ip6cp->ip6c_src,
|
| 452 |
|
|
uh.uh_sport, cmd, cmdarg, notify);
|
| 453 |
|
|
} else
|
| 454 |
|
|
(void) in6_pcbnotify(&udb, sa, 0, (struct sockaddr *)&sa6_src,
|
| 455 |
|
|
0, cmd, cmdarg, notify);
|
| 456 |
|
|
}
|
| 457 |
|
|
|
| 458 |
|
|
static int
|
| 459 |
|
|
udp6_abort(struct socket *so)
|
| 460 |
|
|
{
|
| 461 |
|
|
struct inpcb *inp;
|
| 462 |
|
|
int s;
|
| 463 |
|
|
|
| 464 |
|
|
inp = sotoinpcb(so);
|
| 465 |
|
|
if (inp == 0)
|
| 466 |
|
|
return EINVAL; /* ??? possible? panic instead? */
|
| 467 |
|
|
soisdisconnected(so);
|
| 468 |
|
|
s = splnet();
|
| 469 |
|
|
in6_pcbdetach(inp);
|
| 470 |
|
|
splx(s);
|
| 471 |
|
|
return 0;
|
| 472 |
|
|
}
|
| 473 |
|
|
|
| 474 |
|
|
static int
|
| 475 |
|
|
udp6_attach(struct socket *so, int proto, struct proc *p)
|
| 476 |
|
|
{
|
| 477 |
|
|
struct inpcb *inp;
|
| 478 |
|
|
int s, error;
|
| 479 |
|
|
|
| 480 |
|
|
inp = sotoinpcb(so);
|
| 481 |
|
|
if (inp != 0)
|
| 482 |
|
|
return EINVAL;
|
| 483 |
|
|
|
| 484 |
|
|
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
|
| 485 |
|
|
error = soreserve(so, udp_sendspace, udp_recvspace);
|
| 486 |
|
|
if (error)
|
| 487 |
|
|
return error;
|
| 488 |
|
|
}
|
| 489 |
|
|
s = splnet();
|
| 490 |
|
|
error = in_pcballoc(so, &udbinfo, p);
|
| 491 |
|
|
splx(s);
|
| 492 |
|
|
if (error)
|
| 493 |
|
|
return error;
|
| 494 |
|
|
inp = (struct inpcb *)so->so_pcb;
|
| 495 |
|
|
inp->inp_vflag |= INP_IPV6;
|
| 496 |
|
|
inp->in6p_hops = -1; /* use kernel default */
|
| 497 |
|
|
inp->in6p_cksum = -1; /* just to be sure */
|
| 498 |
|
|
/*
|
| 499 |
|
|
* XXX: ugly!!
|
| 500 |
|
|
* IPv4 TTL initialization is necessary for an IPv6 socket as well,
|
| 501 |
|
|
* because the socket may be bound to an IPv6 wildcard address,
|
| 502 |
|
|
* which may match an IPv4-mapped IPv6 address.
|
| 503 |
|
|
*/
|
| 504 |
|
|
inp->inp_ip_ttl = ip_defttl;
|
| 505 |
|
|
return 0;
|
| 506 |
|
|
}
|
| 507 |
|
|
|
| 508 |
|
|
static int
|
| 509 |
|
|
udp6_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
|
| 510 |
|
|
{
|
| 511 |
|
|
struct inpcb *inp;
|
| 512 |
|
|
int s, error;
|
| 513 |
|
|
|
| 514 |
|
|
inp = sotoinpcb(so);
|
| 515 |
|
|
if (inp == 0)
|
| 516 |
|
|
return EINVAL;
|
| 517 |
|
|
|
| 518 |
|
|
inp->inp_vflag &= ~INP_IPV4;
|
| 519 |
|
|
inp->inp_vflag |= INP_IPV6;
|
| 520 |
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
|
| 521 |
|
|
struct sockaddr_in6 *sin6_p;
|
| 522 |
|
|
|
| 523 |
|
|
sin6_p = (struct sockaddr_in6 *)nam;
|
| 524 |
|
|
|
| 525 |
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr))
|
| 526 |
|
|
inp->inp_vflag |= INP_IPV4;
|
| 527 |
|
|
else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
|
| 528 |
|
|
struct sockaddr_in sin;
|
| 529 |
|
|
|
| 530 |
|
|
in6_sin6_2_sin(&sin, sin6_p);
|
| 531 |
|
|
inp->inp_vflag |= INP_IPV4;
|
| 532 |
|
|
inp->inp_vflag &= ~INP_IPV6;
|
| 533 |
|
|
s = splnet();
|
| 534 |
|
|
error = in_pcbbind(inp, (struct sockaddr *)&sin, p);
|
| 535 |
|
|
splx(s);
|
| 536 |
|
|
return error;
|
| 537 |
|
|
}
|
| 538 |
|
|
}
|
| 539 |
|
|
|
| 540 |
|
|
s = splnet();
|
| 541 |
|
|
error = in6_pcbbind(inp, nam, p);
|
| 542 |
|
|
splx(s);
|
| 543 |
|
|
return error;
|
| 544 |
|
|
}
|
| 545 |
|
|
|
| 546 |
|
|
static int
|
| 547 |
|
|
udp6_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
|
| 548 |
|
|
{
|
| 549 |
|
|
struct inpcb *inp;
|
| 550 |
|
|
int s, error;
|
| 551 |
|
|
|
| 552 |
|
|
inp = sotoinpcb(so);
|
| 553 |
|
|
if (inp == 0)
|
| 554 |
|
|
return EINVAL;
|
| 555 |
|
|
|
| 556 |
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
|
| 557 |
|
|
struct sockaddr_in6 *sin6_p;
|
| 558 |
|
|
|
| 559 |
|
|
sin6_p = (struct sockaddr_in6 *)nam;
|
| 560 |
|
|
if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) {
|
| 561 |
|
|
struct sockaddr_in sin;
|
| 562 |
|
|
|
| 563 |
|
|
if (inp->inp_faddr.s_addr != INADDR_ANY)
|
| 564 |
|
|
return EISCONN;
|
| 565 |
|
|
in6_sin6_2_sin(&sin, sin6_p);
|
| 566 |
|
|
s = splnet();
|
| 567 |
|
|
error = in_pcbconnect(inp, (struct sockaddr *)&sin, p);
|
| 568 |
|
|
splx(s);
|
| 569 |
|
|
if (error == 0) {
|
| 570 |
|
|
inp->inp_vflag |= INP_IPV4;
|
| 571 |
|
|
inp->inp_vflag &= ~INP_IPV6;
|
| 572 |
|
|
soisconnected(so);
|
| 573 |
|
|
}
|
| 574 |
|
|
return error;
|
| 575 |
|
|
}
|
| 576 |
|
|
}
|
| 577 |
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
|
| 578 |
|
|
return EISCONN;
|
| 579 |
|
|
s = splnet();
|
| 580 |
|
|
error = in6_pcbconnect(inp, nam, p);
|
| 581 |
|
|
splx(s);
|
| 582 |
|
|
if (error == 0) {
|
| 583 |
|
|
if (ip6_mapped_addr_on) { /* should be non mapped addr */
|
| 584 |
|
|
inp->inp_vflag &= ~INP_IPV4;
|
| 585 |
|
|
inp->inp_vflag |= INP_IPV6;
|
| 586 |
|
|
}
|
| 587 |
|
|
soisconnected(so);
|
| 588 |
|
|
}
|
| 589 |
|
|
return error;
|
| 590 |
|
|
}
|
| 591 |
|
|
|
| 592 |
|
|
static int
|
| 593 |
|
|
udp6_detach(struct socket *so)
|
| 594 |
|
|
{
|
| 595 |
|
|
struct inpcb *inp;
|
| 596 |
|
|
int s;
|
| 597 |
|
|
|
| 598 |
|
|
inp = sotoinpcb(so);
|
| 599 |
|
|
if (inp == 0)
|
| 600 |
|
|
return EINVAL;
|
| 601 |
|
|
s = splnet();
|
| 602 |
|
|
in6_pcbdetach(inp);
|
| 603 |
|
|
splx(s);
|
| 604 |
|
|
return 0;
|
| 605 |
|
|
}
|
| 606 |
|
|
|
| 607 |
|
|
static int
|
| 608 |
|
|
udp6_disconnect(struct socket *so)
|
| 609 |
|
|
{
|
| 610 |
|
|
struct inpcb *inp;
|
| 611 |
|
|
int s;
|
| 612 |
|
|
|
| 613 |
|
|
inp = sotoinpcb(so);
|
| 614 |
|
|
if (inp == 0)
|
| 615 |
|
|
return EINVAL;
|
| 616 |
|
|
|
| 617 |
|
|
#ifdef INET
|
| 618 |
|
|
if (inp->inp_vflag & INP_IPV4) {
|
| 619 |
|
|
struct pr_usrreqs *pru;
|
| 620 |
|
|
|
| 621 |
|
|
pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
|
| 622 |
|
|
return ((*pru->pru_disconnect)(so));
|
| 623 |
|
|
}
|
| 624 |
|
|
#endif
|
| 625 |
|
|
|
| 626 |
|
|
if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr))
|
| 627 |
|
|
return ENOTCONN;
|
| 628 |
|
|
|
| 629 |
|
|
s = splnet();
|
| 630 |
|
|
in6_pcbdisconnect(inp);
|
| 631 |
|
|
inp->in6p_laddr = in6addr_any;
|
| 632 |
|
|
splx(s);
|
| 633 |
|
|
so->so_state &= ~SS_ISCONNECTED; /* XXX */
|
| 634 |
|
|
return 0;
|
| 635 |
|
|
}
|
| 636 |
|
|
|
| 637 |
|
|
static int
|
| 638 |
|
|
udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr,
|
| 639 |
|
|
struct mbuf *control, struct proc *p)
|
| 640 |
|
|
{
|
| 641 |
|
|
struct inpcb *inp;
|
| 642 |
|
|
int error = 0;
|
| 643 |
|
|
|
| 644 |
|
|
inp = sotoinpcb(so);
|
| 645 |
|
|
if (inp == 0) {
|
| 646 |
|
|
error = EINVAL;
|
| 647 |
|
|
goto bad;
|
| 648 |
|
|
}
|
| 649 |
|
|
|
| 650 |
|
|
if (addr) {
|
| 651 |
|
|
if (addr->sa_len != sizeof(struct sockaddr_in6)) {
|
| 652 |
|
|
error = EINVAL;
|
| 653 |
|
|
goto bad;
|
| 654 |
|
|
}
|
| 655 |
|
|
if (addr->sa_family != AF_INET6) {
|
| 656 |
|
|
error = EAFNOSUPPORT;
|
| 657 |
|
|
goto bad;
|
| 658 |
|
|
}
|
| 659 |
|
|
}
|
| 660 |
|
|
|
| 661 |
|
|
#ifdef INET
|
| 662 |
|
|
if (ip6_mapped_addr_on) {
|
| 663 |
|
|
int hasv4addr;
|
| 664 |
|
|
struct sockaddr_in6 *sin6 = 0;
|
| 665 |
|
|
|
| 666 |
|
|
if (addr == 0)
|
| 667 |
|
|
hasv4addr = (inp->inp_vflag & INP_IPV4);
|
| 668 |
|
|
else {
|
| 669 |
|
|
sin6 = (struct sockaddr_in6 *)addr;
|
| 670 |
|
|
hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)
|
| 671 |
|
|
? 1 : 0;
|
| 672 |
|
|
}
|
| 673 |
|
|
if (hasv4addr) {
|
| 674 |
|
|
struct pr_usrreqs *pru;
|
| 675 |
|
|
|
| 676 |
|
|
if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) {
|
| 677 |
|
|
/*
|
| 678 |
|
|
* since a user of this socket set the
|
| 679 |
|
|
* IPV6_V6ONLY flag, we discard this
|
| 680 |
|
|
* datagram destined to a v4 addr.
|
| 681 |
|
|
*/
|
| 682 |
|
|
return EINVAL;
|
| 683 |
|
|
}
|
| 684 |
|
|
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
|
| 685 |
|
|
&& !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) {
|
| 686 |
|
|
/*
|
| 687 |
|
|
* when remote addr is IPv4-mapped
|
| 688 |
|
|
* address, local addr should not be
|
| 689 |
|
|
* an IPv6 address; since you cannot
|
| 690 |
|
|
* determine how to map IPv6 source
|
| 691 |
|
|
* address to IPv4.
|
| 692 |
|
|
*/
|
| 693 |
|
|
return EINVAL;
|
| 694 |
|
|
}
|
| 695 |
|
|
if (sin6)
|
| 696 |
|
|
in6_sin6_2_sin_in_sock(addr);
|
| 697 |
|
|
pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs;
|
| 698 |
|
|
error = ((*pru->pru_send)(so, flags, m, addr, control,
|
| 699 |
|
|
p));
|
| 700 |
|
|
/* addr will just be freed in sendit(). */
|
| 701 |
|
|
return error;
|
| 702 |
|
|
}
|
| 703 |
|
|
}
|
| 704 |
|
|
#endif
|
| 705 |
|
|
|
| 706 |
|
|
return udp6_output(inp, m, addr, control, p);
|
| 707 |
|
|
|
| 708 |
|
|
bad:
|
| 709 |
|
|
m_freem(m);
|
| 710 |
|
|
return(error);
|
| 711 |
|
|
}
|
| 712 |
|
|
|
| 713 |
|
|
struct pr_usrreqs udp6_usrreqs = {
|
| 714 |
|
|
udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect,
|
| 715 |
|
|
pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect,
|
| 716 |
|
|
pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp,
|
| 717 |
|
|
pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown,
|
| 718 |
|
|
in6_mapped_sockaddr, sosend, soreceive, sopoll
|
| 719 |
|
|
};
|
