udp6_usrreq.c revision 133192
150476Speter/* $FreeBSD: head/sys/netinet6/udp6_usrreq.c 133192 2004-08-06 03:45:45Z rwatson $ */ 215903Swosch/* $KAME: udp6_usrreq.c,v 1.27 2001/05/21 05:45:10 jinmei Exp $ */ 315903Swosch 415903Swosch/* 515903Swosch * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 615903Swosch * All rights reserved. 715903Swosch * 815903Swosch * Redistribution and use in source and binary forms, with or without 915903Swosch * modification, are permitted provided that the following conditions 1015903Swosch * are met: 1115903Swosch * 1. Redistributions of source code must retain the above copyright 1215903Swosch * notice, this list of conditions and the following disclaimer. 1315903Swosch * 2. Redistributions in binary form must reproduce the above copyright 14139761Skrion * notice, this list of conditions and the following disclaimer in the 1534678Sbde * documentation and/or other materials provided with the distribution. 1623546Swosch * 3. Neither the name of the project nor the names of its contributors 1723546Swosch * may be used to endorse or promote products derived from this software 1823546Swosch * without specific prior written permission. 1939161Sobrien * 2015903Swosch * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2139161Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2215903Swosch * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2315903Swosch * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2415903Swosch * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2515903Swosch * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2615903Swosch * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2715903Swosch * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2815903Swosch * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2932216Swosch * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3032216Swosch * SUCH DAMAGE. 3132216Swosch */ 3232216Swosch 33218525Skeramida/* 34218525Skeramida * Copyright (c) 1982, 1986, 1989, 1993 3515903Swosch * The Regents of the University of California. All rights reserved. 3615903Swosch * 3715903Swosch * Redistribution and use in source and binary forms, with or without 3815903Swosch * modification, are permitted provided that the following conditions 39119057Sobrien * are met: 4015903Swosch * 1. Redistributions of source code must retain the above copyright 4115903Swosch * notice, this list of conditions and the following disclaimer. 4215903Swosch * 2. Redistributions in binary form must reproduce the above copyright 4315903Swosch * notice, this list of conditions and the following disclaimer in the 4415903Swosch * documentation and/or other materials provided with the distribution. 4515903Swosch * 4. Neither the name of the University nor the names of its contributors 4615903Swosch * may be used to endorse or promote products derived from this software 4765501Sobrien * without specific prior written permission. 4815903Swosch * 49186894Sbz * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 5015903Swosch * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51186894Sbz * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 5215903Swosch * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 5353033Sphantom * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 5415903Swosch * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 5515903Swosch * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 5615903Swosch * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 5715903Swosch * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5815903Swosch * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5939161Sobrien * SUCH DAMAGE. 6015903Swosch * 6139161Sobrien * @(#)udp_var.h 8.1 (Berkeley) 6/10/93 6215903Swosch */ 6315903Swosch 6415903Swosch#include "opt_inet.h" 6515903Swosch#include "opt_inet6.h" 6615903Swosch#include "opt_ipsec.h" 6715903Swosch 6815903Swosch#include <sys/param.h> 6915903Swosch#include <sys/errno.h> 7015903Swosch#include <sys/kernel.h> 7115903Swosch#include <sys/lock.h> 7215903Swosch#include <sys/mbuf.h> 7315903Swosch#include <sys/proc.h> 7415903Swosch#include <sys/protosw.h> 7515903Swosch#include <sys/signalvar.h> 7615903Swosch#include <sys/socket.h> 7715903Swosch#include <sys/socketvar.h> 7815903Swosch#include <sys/stat.h> 7915903Swosch#include <sys/sx.h> 8015903Swosch#include <sys/sysctl.h> 8115903Swosch#include <sys/syslog.h> 8215903Swosch#include <sys/systm.h> 8315903Swosch 8415903Swosch#include <net/if.h> 8515903Swosch#include <net/if_types.h> 8615903Swosch#include <net/route.h> 8715903Swosch 8815903Swosch#include <netinet/in.h> 8915903Swosch#include <netinet/in_pcb.h> 9015903Swosch#include <netinet/in_systm.h> 9115903Swosch#include <netinet/in_var.h> 9215903Swosch#include <netinet/ip.h> 9315903Swosch#include <netinet/ip6.h> 9415903Swosch#include <netinet/icmp6.h> 9515903Swosch#include <netinet/ip_var.h> 9690627Sphantom#include <netinet/udp.h> 9715903Swosch#include <netinet/udp_var.h> 9890626Sphantom#include <netinet6/ip6protosw.h> 9915903Swosch#include <netinet6/ip6_var.h> 10090626Sphantom#include <netinet6/in6_pcb.h> 10115903Swosch#include <netinet6/udp6_var.h> 10261462Sghelmer 10315903Swosch#ifdef IPSEC 10432216Swosch#include <netinet6/ipsec.h> 10515903Swosch#include <netinet6/ipsec6.h> 10694982Sru#endif /* IPSEC */ 10794982Sru 10894982Sru#ifdef FAST_IPSEC 109164411Sru#include <netipsec/ipsec.h> 110156813Sru#include <netipsec/ipsec6.h> 111156836Sru#endif /* FAST_IPSEC */ 112156836Sru 113156836Sru/* 114164411Sru * UDP protocol inplementation. 115156813Sru * Per RFC 768, August, 1980. 11614968Swosch */ 11739161Sobrien 11839161Sobrienextern struct protosw inetsw[]; 11914573Swoschstatic int udp6_detach __P((struct socket *so)); 12014968Swosch 12114573Swoschint 122111853Sruudp6_input(mp, offp, proto) 123111853Sru struct mbuf **mp; 124111853Sru int *offp, proto; 12565501Sobrien{ 126111853Sru struct mbuf *m = *mp, *opts; 12748204Sjmg register struct ip6_hdr *ip6; 12848204Sjmg register struct udphdr *uh; 12948204Sjmg register struct inpcb *in6p; 13048204Sjmg int off = *offp; 13114573Swosch int plen, ulen; 13232226Ssteve struct sockaddr_in6 fromsa; 13332226Ssteve 134218525Skeramida opts = NULL; 13514573Swosch 13614573Swosch ip6 = mtod(m, struct ip6_hdr *); 13714968Swosch 13814968Swosch if (faithprefix_p != NULL && (*faithprefix_p)(&ip6->ip6_dst)) { 13914968Swosch /* XXX send icmp6 host/port unreach? */ 14014573Swosch m_freem(m); 14114968Swosch return IPPROTO_DONE; 14214968Swosch } 14314968Swosch 14439161Sobrien#ifndef PULLDOWN_TEST 14539161Sobrien IP6_EXTHDR_CHECK(m, off, sizeof(struct udphdr), IPPROTO_DONE); 14614968Swosch ip6 = mtod(m, struct ip6_hdr *); 14714968Swosch uh = (struct udphdr *)((caddr_t)ip6 + off); 14814968Swosch#else 14914968Swosch IP6_EXTHDR_GET(uh, struct udphdr *, m, off, sizeof(*uh)); 15014968Swosch if (!uh) 15114968Swosch return IPPROTO_DONE; 15214968Swosch#endif 15314968Swosch 15414968Swosch udpstat.udps_ipackets++; 15514968Swosch 15614968Swosch plen = ntohs(ip6->ip6_plen) - off + sizeof(*ip6); 15714968Swosch ulen = ntohs((u_short)uh->uh_ulen); 15814968Swosch 15914968Swosch if (plen != ulen) { 16014968Swosch udpstat.udps_badlen++; 16114968Swosch goto bad; 16214968Swosch } 16314968Swosch 16490626Sphantom /* 16590626Sphantom * Checksum extended UDP header and data. 16661462Sghelmer */ 16714968Swosch if (uh->uh_sum == 0) { 16832216Swosch udpstat.udps_nosum++; 16932216Swosch goto bad; 17014968Swosch } 171125494Sru if (in6_cksum(m, IPPROTO_UDP, off, ulen) != 0) { 172125494Sru udpstat.udps_badsum++; 173125494Sru goto bad; 174125494Sru } 17534678Sbde 17623546Swosch if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)) { 17794982Sru struct inpcb *last; 178164411Sru 179156813Sru /* 180156813Sru * Deliver a multicast datagram to all sockets 181156813Sru * for which the local and remote addresses and ports match 182156813Sru * those of the incoming datagram. This allows more than 183156813Sru * one process to receive multicasts on the same port. 184156813Sru * (This really ought to be done for unicast datagrams as 185156813Sru * well, but that would cause problems with existing 186156813Sru * applications that open both address-specific sockets and 187156813Sru * a wildcard socket listening to the same port -- they would 188156813Sru * end up receiving duplicates of every unicast datagram. 189156813Sru * Those applications open the multiple sockets to overcome an 190156813Sru * inadequacy of the UDP socket interface, but for backwards 191156813Sru * compatibility we avoid the problem here rather than 192172832Sru * fixing the interface. Maybe 4.5BSD will remedy this?) 193156869Sru */ 194156869Sru 195156813Sru /* 196156813Sru * In a case that laddr should be set to the link-local 197156813Sru * address (this happens in RIPng), the multicast address 198156813Sru * specified in the received packet does not match with 199156813Sru * laddr. To cure this situation, the matching is relaxed 200156813Sru * if the receiving interface is the same as one specified 201156813Sru * in the socket and if the destination multicast address 202156813Sru * matches one of the multicast groups specified in the socket. 203156813Sru */ 204156813Sru 205156813Sru /* 206156813Sru * Construct sockaddr format source address. 207156813Sru */ 208156813Sru init_sin6(&fromsa, m); 209156813Sru fromsa.sin6_port = uh->uh_sport; 210156813Sru /* 211156813Sru * KAME note: traditionally we dropped udpiphdr from mbuf here. 212156813Sru * We need udphdr for IPsec processing so we do that later. 213156813Sru */ 214156813Sru 215156813Sru /* 216156813Sru * Locate pcb(s) for datagram. 217156813Sru * (Algorithm copied from raw_intr().) 218156813Sru */ 219156813Sru last = NULL; 220156813Sru LIST_FOREACH(in6p, &udb, inp_list) { 221156813Sru if ((in6p->inp_vflag & INP_IPV6) == 0) 222156813Sru continue; 223156813Sru if (in6p->in6p_lport != uh->uh_dport) 224156813Sru continue; 225156813Sru if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_laddr)) { 226156813Sru if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_laddr, 227156813Sru &ip6->ip6_dst)) 228156813Sru continue; 229156813Sru } 230156813Sru if (!IN6_IS_ADDR_UNSPECIFIED(&in6p->in6p_faddr)) { 231156813Sru if (!IN6_ARE_ADDR_EQUAL(&in6p->in6p_faddr, 232156813Sru &ip6->ip6_src) || 233156813Sru in6p->in6p_fport != uh->uh_sport) 234156813Sru continue; 235156813Sru } 236156813Sru 237156813Sru if (last != NULL) { 238156813Sru struct mbuf *n; 239156813Sru 240157115Sru#if defined(IPSEC) || defined(FAST_IPSEC) 241156813Sru /* 242156813Sru * Check AH/ESP integrity. 243156813Sru */ 244156813Sru if (ipsec6_in_reject(m, last)) { 245156813Sru#ifdef IPSEC 246156813Sru ipsec6stat.in_polvio++; 247156813Sru#endif /* IPSEC */ 248156813Sru /* do not inject data into pcb */ 249156813Sru } else 250158115Sume#endif /*IPSEC || FAST_IPSEC*/ 251156813Sru if ((n = m_copy(m, 0, M_COPYALL)) != NULL) { 252156813Sru /* 253156813Sru * KAME NOTE: do not 254156813Sru * m_copy(m, offset, ...) above. 255156813Sru * sbappendaddr() expects M_PKTHDR, 256156813Sru * and m_copy() will copy M_PKTHDR 257156813Sru * only if offset is 0. 258156813Sru */ 259156813Sru if (last->in6p_flags & IN6P_CONTROLOPTS 260156813Sru || last->in6p_socket->so_options & SO_TIMESTAMP) 261156813Sru ip6_savecontrol(last, n, &opts); 262156813Sru 263156813Sru m_adj(n, off + sizeof(struct udphdr)); 264156813Sru if (sbappendaddr(&last->in6p_socket->so_rcv, 265156813Sru (struct sockaddr *)&fromsa, 266156813Sru n, opts) == 0) { 267156813Sru m_freem(n); 268156813Sru if (opts) 269156813Sru m_freem(opts); 270156813Sru udpstat.udps_fullsock++; 271156813Sru } else 272156813Sru sorwakeup(last->in6p_socket); 273156813Sru opts = NULL; 274156813Sru } 275156813Sru } 276156813Sru last = in6p; 277156813Sru /* 278156813Sru * Don't look for additional matches if this one does 279156813Sru * not have either the SO_REUSEPORT or SO_REUSEADDR 280156813Sru * socket options set. This heuristic avoids searching 281156813Sru * through all pcbs in the common case of a non-shared 282156813Sru * port. It assumes that an application will never 283220359Simp * clear these options after setting them. 284183242Ssam */ 285156813Sru if ((last->in6p_socket->so_options & 286183242Ssam (SO_REUSEPORT|SO_REUSEADDR)) == 0) 287183242Ssam break; 288162210Simp } 289183242Ssam 290156813Sru if (last == NULL) { 291156813Sru /* 292156813Sru * No matching pcb found; discard datagram. 293156813Sru * (No need to send an ICMP Port Unreachable 294156813Sru * for a broadcast or multicast datgram.) 295156813Sru */ 296156813Sru udpstat.udps_noport++; 297156813Sru udpstat.udps_noportmcast++; 298156813Sru goto bad; 299156813Sru } 300218936Simp#if defined(IPSEC) || defined(FAST_IPSEC) 301156813Sru /* 302156813Sru * Check AH/ESP integrity. 303179815Sdougb */ 304183242Ssam if (ipsec6_in_reject(m, last)) { 305166255Sdelphij#ifdef IPSEC 306156813Sru ipsec6stat.in_polvio++; 307163861Sjb#endif /* IPSEC */ 308156813Sru goto bad; 309156813Sru } 310183242Ssam#endif /*IPSEC || FAST_IPSEC*/ 311156813Sru if (last->in6p_flags & IN6P_CONTROLOPTS 312156813Sru || last->in6p_socket->so_options & SO_TIMESTAMP) 313156813Sru ip6_savecontrol(last, m, &opts); 314156813Sru 315156813Sru m_adj(m, off + sizeof(struct udphdr)); 316183242Ssam if (sbappendaddr(&last->in6p_socket->so_rcv, 317156813Sru (struct sockaddr *)&fromsa, 318156813Sru m, opts) == 0) { 319183242Ssam udpstat.udps_fullsock++; 320156813Sru goto bad; 321218936Simp } 322156813Sru sorwakeup(last->in6p_socket); 323156813Sru return IPPROTO_DONE; 324156813Sru } 325156813Sru /* 326220359Simp * Locate pcb for datagram. 327156813Sru */ 328156813Sru in6p = in6_pcblookup_hash(&udbinfo, &ip6->ip6_src, uh->uh_sport, 329221266Sbz &ip6->ip6_dst, uh->uh_dport, 1, 330156813Sru m->m_pkthdr.rcvif); 331156813Sru if (in6p == 0) { 332172832Sru if (log_in_vain) { 333156813Sru char buf[INET6_ADDRSTRLEN]; 334183242Ssam 335156813Sru strcpy(buf, ip6_sprintf(&ip6->ip6_dst)); 336183242Ssam log(LOG_INFO, 337156813Sru "Connection attempt to UDP [%s]:%d from [%s]:%d\n", 338170644Ssepotvin buf, ntohs(uh->uh_dport), 339183242Ssam ip6_sprintf(&ip6->ip6_src), ntohs(uh->uh_sport)); 340157115Sru } 341156813Sru udpstat.udps_noport++; 342156813Sru if (m->m_flags & M_MCAST) { 343156813Sru printf("UDP6: M_MCAST is set in a unicast packet.\n"); 344183242Ssam udpstat.udps_noportmcast++; 345156813Sru goto bad; 346183242Ssam } 347156813Sru icmp6_error(m, ICMP6_DST_UNREACH, ICMP6_DST_UNREACH_NOPORT, 0); 348183242Ssam return IPPROTO_DONE; 349156813Sru } 350156905Sru#if defined(IPSEC) || defined(FAST_IPSEC) 351183242Ssam /* 352156813Sru * Check AH/ESP integrity. 353183242Ssam */ 354156813Sru if (ipsec6_in_reject(m, in6p)) { 355156813Sru#ifdef IPSEC 356156813Sru ipsec6stat.in_polvio++; 357158115Sume#endif /* IPSEC */ 358183242Ssam goto bad; 359156813Sru } 360156813Sru#endif /*IPSEC || FAST_IPSEC*/ 361156813Sru 362156813Sru /* 363183242Ssam * Construct sockaddr format source address. 364183242Ssam * Stuff source address and datagram in user buffer. 365183242Ssam */ 366183242Ssam init_sin6(&fromsa, m); 367156869Sru fromsa.sin6_port = uh->uh_sport; 368183242Ssam if (in6p->in6p_flags & IN6P_CONTROLOPTS 369156813Sru || in6p->in6p_socket->so_options & SO_TIMESTAMP) 370156813Sru ip6_savecontrol(in6p, m, &opts); 371156813Sru m_adj(m, off + sizeof(struct udphdr)); 372183242Ssam if (sbappendaddr(&in6p->in6p_socket->so_rcv, 373156813Sru (struct sockaddr *)&fromsa, m, opts) == 0) { 374156813Sru udpstat.udps_fullsock++; 375156813Sru goto bad; 376169724Skan } 377183242Ssam sorwakeup(in6p->in6p_socket); 378169524Sdeischen return IPPROTO_DONE; 379156813Srubad: 380156813Sru if (m) 381183242Ssam m_freem(m); 382183242Ssam if (opts) 383156813Sru m_freem(opts); 384156813Sru return IPPROTO_DONE; 385183242Ssam} 386168409Spjd 387175617Sruvoid 388175617Sruudp6_ctlinput(cmd, sa, d) 389220359Simp int cmd; 390220359Simp struct sockaddr *sa; 391220359Simp void *d; 392220359Simp{ 393220359Simp struct udphdr uh; 394220359Simp struct ip6_hdr *ip6; 395220359Simp struct mbuf *m; 396220359Simp int off = 0; 397220359Simp struct ip6ctlparam *ip6cp = NULL; 398220359Simp const struct sockaddr_in6 *sa6_src = NULL; 399220359Simp void *cmdarg; 400220359Simp struct inpcb *(*notify) __P((struct inpcb *, int)) = udp_notify; 401220359Simp struct udp_portonly { 402220359Simp u_int16_t uh_sport; 403220359Simp u_int16_t uh_dport; 404220359Simp } *uhp; 405220359Simp 406220359Simp if (sa->sa_family != AF_INET6 || 407220359Simp sa->sa_len != sizeof(struct sockaddr_in6)) 408220359Simp return; 409220359Simp 410220359Simp if ((unsigned)cmd >= PRC_NCMDS) 411220359Simp return; 412220359Simp if (PRC_IS_REDIRECT(cmd)) 413220359Simp notify = in6_rtchange, d = NULL; 414220359Simp else if (cmd == PRC_HOSTDEAD) 415220359Simp d = NULL; 416220359Simp else if (inet6ctlerrmap[cmd] == 0) 417220359Simp return; 418220359Simp 419220359Simp /* if the parameter is from icmp6, decode it. */ 420220359Simp if (d != NULL) { 421220359Simp ip6cp = (struct ip6ctlparam *)d; 422220359Simp m = ip6cp->ip6c_m; 423220359Simp ip6 = ip6cp->ip6c_ip6; 424220359Simp off = ip6cp->ip6c_off; 425220359Simp cmdarg = ip6cp->ip6c_cmdarg; 426220359Simp sa6_src = ip6cp->ip6c_src; 427220359Simp } else { 428220359Simp m = NULL; 429220359Simp ip6 = NULL; 430220359Simp cmdarg = NULL; 431220359Simp sa6_src = &sa6_any; 432220359Simp } 433220359Simp 434156813Sru if (ip6) { 435156813Sru /* 436156813Sru * XXX: We assume that when IPV6 is non NULL, 437156813Sru * M and OFF are valid. 438156813Sru */ 439156813Sru 440156813Sru /* check if we can safely examine src and dst ports */ 441156813Sru if (m->m_pkthdr.len < off + sizeof(*uhp)) 442156813Sru return; 443156813Sru 444156813Sru bzero(&uh, sizeof(uh)); 445156813Sru m_copydata(m, off, sizeof(*uhp), (caddr_t)&uh); 446220359Simp 447156813Sru (void) in6_pcbnotify(&udbinfo, sa, uh.uh_dport, 448156813Sru (struct sockaddr *)ip6cp->ip6c_src, 449156813Sru uh.uh_sport, cmd, cmdarg, notify); 450156813Sru } else 451220359Simp (void) in6_pcbnotify(&udbinfo, sa, 0, 452156813Sru (const struct sockaddr *)sa6_src, 453156813Sru 0, cmd, cmdarg, notify); 454156813Sru} 455156813Sru 456156813Srustatic int 457156813Sruudp6_getcred(SYSCTL_HANDLER_ARGS) 458156813Sru{ 459156813Sru struct xucred xuc; 460156813Sru struct sockaddr_in6 addrs[2]; 461156813Sru struct inpcb *inp; 462156813Sru int error, s; 463156813Sru 464220359Simp error = suser(req->td); 465156813Sru if (error) 466156813Sru return (error); 467156813Sru 468172571Sru if (req->newlen != sizeof(addrs)) 469156813Sru return (EINVAL); 470172571Sru if (req->oldlen != sizeof(struct xucred)) 471172571Sru return (EINVAL); 472172571Sru error = SYSCTL_IN(req, addrs, sizeof(addrs)); 473172571Sru if (error) 474177714Sru return (error); 475172571Sru s = splnet(); 476172571Sru inp = in6_pcblookup_hash(&udbinfo, &addrs[1].sin6_addr, 477172571Sru addrs[1].sin6_port, 478156813Sru &addrs[0].sin6_addr, addrs[0].sin6_port, 479156813Sru 1, NULL); 480156813Sru if (!inp || !inp->inp_socket) { 481156813Sru error = ENOENT; 482156813Sru goto out; 483156813Sru } 484156813Sru cru2x(inp->inp_socket->so_cred, &xuc); 485156813Sru error = SYSCTL_OUT(req, &xuc, sizeof(struct xucred)); 486156813Sruout: 487156813Sru splx(s); 488157378Sphk return (error); 489157378Sphk} 490157378Sphk 491157378SphkSYSCTL_PROC(_net_inet6_udp6, OID_AUTO, getcred, CTLTYPE_OPAQUE|CTLFLAG_RW, 492168409Spjd 0, 0, 493168409Spjd udp6_getcred, "S,xucred", "Get the xucred of a UDP6 connection"); 494168409Spjd 495168409Spjdstatic int 496156813Sruudp6_abort(struct socket *so) 497156813Sru{ 498156813Sru struct inpcb *inp; 499156813Sru int s; 500156813Sru 501156813Sru inp = sotoinpcb(so); 502220401Suqs if (inp == 0) 503220401Suqs return EINVAL; /* ??? possible? panic instead? */ 504220401Suqs soisdisconnected(so); 505220401Suqs s = splnet(); 506220401Suqs in6_pcbdetach(inp); 507156905Sru splx(s); 508156905Sru return 0; 509156905Sru} 510156905Sru 511183242Ssamstatic int 512183242Ssamudp6_attach(struct socket *so, int proto, struct thread *td) 513183242Ssam{ 514183242Ssam struct inpcb *inp; 515183242Ssam int s, error; 516202440Santoine 517202440Santoine INP_INFO_WLOCK(&udbinfo); 518202440Santoine inp = sotoinpcb(so); 519202440Santoine if (inp != 0) { 520202440Santoine INP_INFO_WUNLOCK(&udbinfo); 521156813Sru return EINVAL; 522156813Sru } 523156813Sru 524156813Sru if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 525156813Sru error = soreserve(so, udp_sendspace, udp_recvspace); 526156813Sru if (error) { 527156813Sru INP_INFO_WUNLOCK(&udbinfo); 528156813Sru return error; 529156813Sru } 530183242Ssam } 531183242Ssam s = splnet(); 532183242Ssam error = in_pcballoc(so, &udbinfo, "udp6inp"); 533183242Ssam splx(s); 534156813Sru if (error) { 535208964Srdivacky INP_INFO_WUNLOCK(&udbinfo); 536156813Sru return error; 537156813Sru } 538156813Sru inp = (struct inpcb *)so->so_pcb; 539156813Sru INP_LOCK(inp); 540156813Sru INP_INFO_WUNLOCK(&udbinfo); 541156813Sru inp->inp_vflag |= INP_IPV6; 542156813Sru if (!ip6_v6only) 543156813Sru inp->inp_vflag |= INP_IPV4; 544156813Sru inp->in6p_hops = -1; /* use kernel default */ 545156813Sru inp->in6p_cksum = -1; /* just to be sure */ 546156813Sru /* 547156813Sru * XXX: ugly!! 548166255Sdelphij * IPv4 TTL initialization is necessary for an IPv6 socket as well, 549156813Sru * because the socket may be bound to an IPv6 wildcard address, 550221266Sbz * which may match an IPv4-mapped IPv6 address. 551156813Sru */ 552156813Sru inp->inp_ip_ttl = ip_defttl; 553156813Sru INP_UNLOCK(inp); 554170644Ssepotvin return 0; 555183242Ssam} 556183242Ssam 557183242Ssamstatic int 558156813Sruudp6_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 559156813Sru{ 560156813Sru struct inpcb *inp; 561156813Sru int s, error; 562156813Sru 563156813Sru INP_INFO_WLOCK(&udbinfo); 564156813Sru inp = sotoinpcb(so); 565156813Sru if (inp == 0) { 566156813Sru INP_INFO_WUNLOCK(&udbinfo); 567156813Sru return EINVAL; 568156813Sru } 569156813Sru INP_LOCK(inp); 570174548Sru 571174548Sru inp->inp_vflag &= ~INP_IPV4; 572174548Sru inp->inp_vflag |= INP_IPV6; 573174548Sru if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 574174548Sru struct sockaddr_in6 *sin6_p; 575208320Sjkim 576208320Sjkim sin6_p = (struct sockaddr_in6 *)nam; 577174548Sru 578174548Sru if (IN6_IS_ADDR_UNSPECIFIED(&sin6_p->sin6_addr)) 579174548Sru inp->inp_vflag |= INP_IPV4; 580174548Sru else if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 581174548Sru struct sockaddr_in sin; 582174548Sru 583174548Sru in6_sin6_2_sin(&sin, sin6_p); 584174548Sru inp->inp_vflag |= INP_IPV4; 585174548Sru inp->inp_vflag &= ~INP_IPV6; 586174548Sru s = splnet(); 587174548Sru error = in_pcbbind(inp, (struct sockaddr *)&sin, 588174548Sru td->td_ucred); 589174548Sru goto out; 590174548Sru } 591174548Sru } 592164411Sru 593156813Sru s = splnet(); 594144893Sharti error = in6_pcbbind(inp, nam, td->td_ucred); 595out: 596 INP_UNLOCK(inp); 597 INP_INFO_WUNLOCK(&udbinfo); 598 splx(s); 599 return error; 600} 601 602static int 603udp6_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 604{ 605 struct inpcb *inp; 606 int s, error; 607 608 INP_INFO_WLOCK(&udbinfo); 609 inp = sotoinpcb(so); 610 if (inp == 0) { 611 INP_INFO_WUNLOCK(&udbinfo); 612 return EINVAL; 613 } 614 INP_LOCK(inp); 615 616 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 617 struct sockaddr_in6 *sin6_p; 618 619 sin6_p = (struct sockaddr_in6 *)nam; 620 if (IN6_IS_ADDR_V4MAPPED(&sin6_p->sin6_addr)) { 621 struct sockaddr_in sin; 622 623 if (inp->inp_faddr.s_addr != INADDR_ANY) 624 return EISCONN; 625 in6_sin6_2_sin(&sin, sin6_p); 626 s = splnet(); 627 error = in_pcbconnect(inp, (struct sockaddr *)&sin, 628 td->td_ucred); 629 splx(s); 630 if (error == 0) { 631 inp->inp_vflag |= INP_IPV4; 632 inp->inp_vflag &= ~INP_IPV6; 633 soisconnected(so); 634 } 635 goto out; 636 } 637 } 638 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 639 error = EISCONN; 640 goto out; 641 } 642 s = splnet(); 643 error = in6_pcbconnect(inp, nam, td->td_ucred); 644 splx(s); 645 if (error == 0) { 646 if (!ip6_v6only) { /* should be non mapped addr */ 647 inp->inp_vflag &= ~INP_IPV4; 648 inp->inp_vflag |= INP_IPV6; 649 } 650 soisconnected(so); 651 } 652out: 653 INP_UNLOCK(inp); 654 INP_INFO_WUNLOCK(&udbinfo); 655 return error; 656} 657 658static int 659udp6_detach(struct socket *so) 660{ 661 struct inpcb *inp; 662 int s; 663 664 INP_INFO_WLOCK(&udbinfo); 665 inp = sotoinpcb(so); 666 if (inp == 0) { 667 INP_INFO_WUNLOCK(&udbinfo); 668 return EINVAL; 669 } 670 INP_LOCK(inp); 671 s = splnet(); 672 in6_pcbdetach(inp); 673 splx(s); 674 INP_INFO_WUNLOCK(&udbinfo); 675 return 0; 676} 677 678static int 679udp6_disconnect(struct socket *so) 680{ 681 struct inpcb *inp; 682 int error, s; 683 684 INP_INFO_WLOCK(&udbinfo); 685 inp = sotoinpcb(so); 686 if (inp == 0) { 687 INP_INFO_WUNLOCK(&udbinfo); 688 return EINVAL; 689 } 690 INP_LOCK(inp); 691 692#ifdef INET 693 if (inp->inp_vflag & INP_IPV4) { 694 struct pr_usrreqs *pru; 695 696 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 697 error = (*pru->pru_disconnect)(so); 698 goto out; 699 } 700#endif 701 702 if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) { 703 error = ENOTCONN; 704 goto out; 705 } 706 707 s = splnet(); 708 in6_pcbdisconnect(inp); 709 inp->in6p_laddr = in6addr_any; 710 splx(s); 711 /* XXXRW: so_state locking? */ 712 so->so_state &= ~SS_ISCONNECTED; /* XXX */ 713out: 714 INP_UNLOCK(inp); 715 INP_INFO_WUNLOCK(&udbinfo); 716 return 0; 717} 718 719static int 720udp6_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *addr, 721 struct mbuf *control, struct thread *td) 722{ 723 struct inpcb *inp; 724 int error = 0; 725 726 INP_INFO_WLOCK(&udbinfo); 727 inp = sotoinpcb(so); 728 if (inp == 0) { 729 INP_INFO_WUNLOCK(&udbinfo); 730 m_freem(m); 731 return EINVAL; 732 } 733 INP_LOCK(inp); 734 735 if (addr) { 736 if (addr->sa_len != sizeof(struct sockaddr_in6)) { 737 error = EINVAL; 738 goto bad; 739 } 740 if (addr->sa_family != AF_INET6) { 741 error = EAFNOSUPPORT; 742 goto bad; 743 } 744 } 745 746#ifdef INET 747 if (!ip6_v6only) { 748 int hasv4addr; 749 struct sockaddr_in6 *sin6 = 0; 750 751 if (addr == 0) 752 hasv4addr = (inp->inp_vflag & INP_IPV4); 753 else { 754 sin6 = (struct sockaddr_in6 *)addr; 755 hasv4addr = IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr) 756 ? 1 : 0; 757 } 758 if (hasv4addr) { 759 struct pr_usrreqs *pru; 760 761 if ((inp->inp_flags & IN6P_IPV6_V6ONLY)) { 762 /* 763 * since a user of this socket set the 764 * IPV6_V6ONLY flag, we discard this 765 * datagram destined to a v4 addr. 766 */ 767 error = EINVAL; 768 goto out; 769 } 770 if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr) && 771 !IN6_IS_ADDR_V4MAPPED(&inp->in6p_laddr)) { 772 /* 773 * when remote addr is IPv4-mapped 774 * address, local addr should not be 775 * an IPv6 address; since you cannot 776 * determine how to map IPv6 source 777 * address to IPv4. 778 */ 779 error = EINVAL; 780 goto out; 781 } 782 if (sin6) 783 in6_sin6_2_sin_in_sock(addr); 784 pru = inetsw[ip_protox[IPPROTO_UDP]].pr_usrreqs; 785 error = ((*pru->pru_send)(so, flags, m, addr, control, 786 td)); 787 /* addr will just be freed in sendit(). */ 788 goto out; 789 } 790 } 791#endif 792 793 error = udp6_output(inp, m, addr, control, td); 794out: 795 INP_UNLOCK(inp); 796 INP_INFO_WUNLOCK(&udbinfo); 797 return error; 798 799 bad: 800 INP_UNLOCK(inp); 801 INP_INFO_WUNLOCK(&udbinfo); 802 m_freem(m); 803 return (error); 804} 805 806struct pr_usrreqs udp6_usrreqs = { 807 udp6_abort, pru_accept_notsupp, udp6_attach, udp6_bind, udp6_connect, 808 pru_connect2_notsupp, in6_control, udp6_detach, udp6_disconnect, 809 pru_listen_notsupp, in6_mapped_peeraddr, pru_rcvd_notsupp, 810 pru_rcvoob_notsupp, udp6_send, pru_sense_null, udp_shutdown, 811 in6_mapped_sockaddr, sosend, soreceive, sopoll, in_pcbsosetlabel 812}; 813