| File: | netinet6/ip6_output.c |
| Warning: | line 2921, column 6 Branch condition evaluates to a garbage value |
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| 1 | /* $OpenBSD: ip6_output.c,v 1.282 2023/12/01 15:30:47 bluhm Exp $ */ | |||
| 2 | /* $KAME: ip6_output.c,v 1.172 2001/03/25 09:55:56 itojun Exp $ */ | |||
| 3 | ||||
| 4 | /* | |||
| 5 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. | |||
| 6 | * All rights reserved. | |||
| 7 | * | |||
| 8 | * Redistribution and use in source and binary forms, with or without | |||
| 9 | * modification, are permitted provided that the following conditions | |||
| 10 | * are met: | |||
| 11 | * 1. Redistributions of source code must retain the above copyright | |||
| 12 | * notice, this list of conditions and the following disclaimer. | |||
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |||
| 14 | * notice, this list of conditions and the following disclaimer in the | |||
| 15 | * documentation and/or other materials provided with the distribution. | |||
| 16 | * 3. Neither the name of the project nor the names of its contributors | |||
| 17 | * may be used to endorse or promote products derived from this software | |||
| 18 | * without specific prior written permission. | |||
| 19 | * | |||
| 20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND | |||
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE | |||
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
| 30 | * SUCH DAMAGE. | |||
| 31 | */ | |||
| 32 | ||||
| 33 | /* | |||
| 34 | * Copyright (c) 1982, 1986, 1988, 1990, 1993 | |||
| 35 | * The Regents of the University of California. All rights reserved. | |||
| 36 | * | |||
| 37 | * Redistribution and use in source and binary forms, with or without | |||
| 38 | * modification, are permitted provided that the following conditions | |||
| 39 | * are met: | |||
| 40 | * 1. Redistributions of source code must retain the above copyright | |||
| 41 | * notice, this list of conditions and the following disclaimer. | |||
| 42 | * 2. Redistributions in binary form must reproduce the above copyright | |||
| 43 | * notice, this list of conditions and the following disclaimer in the | |||
| 44 | * documentation and/or other materials provided with the distribution. | |||
| 45 | * 3. Neither the name of the University nor the names of its contributors | |||
| 46 | * may be used to endorse or promote products derived from this software | |||
| 47 | * without specific prior written permission. | |||
| 48 | * | |||
| 49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |||
| 50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |||
| 51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |||
| 52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |||
| 53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |||
| 54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |||
| 55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||
| 56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |||
| 57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |||
| 58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |||
| 59 | * SUCH DAMAGE. | |||
| 60 | * | |||
| 61 | * @(#)ip_output.c 8.3 (Berkeley) 1/21/94 | |||
| 62 | */ | |||
| 63 | ||||
| 64 | #include "pf.h" | |||
| 65 | ||||
| 66 | #include <sys/param.h> | |||
| 67 | #include <sys/malloc.h> | |||
| 68 | #include <sys/mbuf.h> | |||
| 69 | #include <sys/errno.h> | |||
| 70 | #include <sys/protosw.h> | |||
| 71 | #include <sys/socket.h> | |||
| 72 | #include <sys/socketvar.h> | |||
| 73 | #include <sys/proc.h> | |||
| 74 | #include <sys/systm.h> | |||
| 75 | ||||
| 76 | #include <net/if.h> | |||
| 77 | #include <net/if_var.h> | |||
| 78 | #include <net/if_enc.h> | |||
| 79 | #include <net/route.h> | |||
| 80 | ||||
| 81 | #include <netinet/in.h> | |||
| 82 | #include <netinet/ip.h> | |||
| 83 | #include <netinet/in_pcb.h> | |||
| 84 | #include <netinet/udp.h> | |||
| 85 | #include <netinet/tcp.h> | |||
| 86 | ||||
| 87 | #include <netinet/ip_var.h> | |||
| 88 | #include <netinet/tcp_timer.h> | |||
| 89 | #include <netinet/tcp_var.h> | |||
| 90 | #include <netinet/udp_var.h> | |||
| 91 | ||||
| 92 | #include <netinet6/in6_var.h> | |||
| 93 | #include <netinet/ip6.h> | |||
| 94 | #include <netinet/icmp6.h> | |||
| 95 | #include <netinet6/ip6_var.h> | |||
| 96 | #include <netinet6/nd6.h> | |||
| 97 | ||||
| 98 | #include <crypto/idgen.h> | |||
| 99 | ||||
| 100 | #if NPF1 > 0 | |||
| 101 | #include <net/pfvar.h> | |||
| 102 | #endif | |||
| 103 | ||||
| 104 | #ifdef IPSEC1 | |||
| 105 | #include <netinet/ip_ipsp.h> | |||
| 106 | #include <netinet/ip_ah.h> | |||
| 107 | #include <netinet/ip_esp.h> | |||
| 108 | ||||
| 109 | #ifdef ENCDEBUG | |||
| 110 | #define DPRINTF(fmt, args...)do { } while (0) \ | |||
| 111 | do { \ | |||
| 112 | if (encdebug) \ | |||
| 113 | printf("%s: " fmt "\n", __func__, ## args); \ | |||
| 114 | } while (0) | |||
| 115 | #else | |||
| 116 | #define DPRINTF(fmt, args...)do { } while (0) \ | |||
| 117 | do { } while (0) | |||
| 118 | #endif | |||
| 119 | #endif /* IPSEC */ | |||
| 120 | ||||
| 121 | struct ip6_exthdrs { | |||
| 122 | struct mbuf *ip6e_ip6; | |||
| 123 | struct mbuf *ip6e_hbh; | |||
| 124 | struct mbuf *ip6e_dest1; | |||
| 125 | struct mbuf *ip6e_rthdr; | |||
| 126 | struct mbuf *ip6e_dest2; | |||
| 127 | }; | |||
| 128 | ||||
| 129 | int ip6_pcbopt(int, u_char *, int, struct ip6_pktopts **, int, int); | |||
| 130 | int ip6_getpcbopt(struct ip6_pktopts *, int, struct mbuf *); | |||
| 131 | int ip6_setpktopt(int, u_char *, int, struct ip6_pktopts *, int, int, int); | |||
| 132 | int ip6_setmoptions(int, struct ip6_moptions **, struct mbuf *, unsigned int); | |||
| 133 | int ip6_getmoptions(int, struct ip6_moptions *, struct mbuf *); | |||
| 134 | int ip6_copyexthdr(struct mbuf **, caddr_t, int); | |||
| 135 | int ip6_insertfraghdr(struct mbuf *, struct mbuf *, int, | |||
| 136 | struct ip6_frag **); | |||
| 137 | int ip6_insert_jumboopt(struct ip6_exthdrs *, u_int32_t); | |||
| 138 | int ip6_splithdr(struct mbuf *, struct ip6_exthdrs *); | |||
| 139 | int ip6_getpmtu(struct rtentry *, struct ifnet *, u_long *); | |||
| 140 | int copypktopts(struct ip6_pktopts *, struct ip6_pktopts *); | |||
| 141 | static __inline u_int16_t __attribute__((__unused__)) | |||
| 142 | in6_cksum_phdr(const struct in6_addr *, const struct in6_addr *, | |||
| 143 | u_int32_t, u_int32_t); | |||
| 144 | void in6_delayed_cksum(struct mbuf *, u_int8_t); | |||
| 145 | ||||
| 146 | int ip6_output_ipsec_pmtu_update(struct tdb *, struct route_in6 *, | |||
| 147 | struct in6_addr *, int, int, int); | |||
| 148 | ||||
| 149 | /* Context for non-repeating IDs */ | |||
| 150 | struct idgen32_ctx ip6_id_ctx; | |||
| 151 | ||||
| 152 | /* | |||
| 153 | * IP6 output. The packet in mbuf chain m contains a skeletal IP6 | |||
| 154 | * header (with pri, len, nxt, hlim, src, dst). | |||
| 155 | * This function may modify ver and hlim only. | |||
| 156 | * The mbuf chain containing the packet will be freed. | |||
| 157 | * The mbuf opt, if present, will not be freed. | |||
| 158 | * | |||
| 159 | * type of "mtu": rt_mtu is u_long, ifnet.ifr_mtu is int. | |||
| 160 | * We use u_long to hold largest one, * which is rt_mtu. | |||
| 161 | */ | |||
| 162 | int | |||
| 163 | ip6_output(struct mbuf *m, struct ip6_pktopts *opt, struct route_in6 *ro, | |||
| 164 | int flags, struct ip6_moptions *im6o, const u_char seclevel[]) | |||
| 165 | { | |||
| 166 | struct ip6_hdr *ip6; | |||
| 167 | struct ifnet *ifp = NULL((void *)0); | |||
| 168 | struct mbuf_list ml; | |||
| 169 | int hlen, tlen; | |||
| 170 | struct route_in6 ip6route; | |||
| 171 | struct rtentry *rt = NULL((void *)0); | |||
| 172 | struct sockaddr_in6 *dst, dstsock; | |||
| 173 | int error = 0; | |||
| 174 | u_long mtu; | |||
| 175 | int dontfrag; | |||
| 176 | u_int16_t src_scope, dst_scope; | |||
| 177 | u_int32_t optlen = 0, plen = 0, unfragpartlen = 0; | |||
| 178 | struct ip6_exthdrs exthdrs; | |||
| 179 | struct in6_addr finaldst; | |||
| 180 | struct route_in6 *ro_pmtu = NULL((void *)0); | |||
| 181 | int hdrsplit = 0; | |||
| 182 | u_int8_t sproto = 0; | |||
| 183 | u_char nextproto; | |||
| 184 | #ifdef IPSEC1 | |||
| 185 | struct tdb *tdb = NULL((void *)0); | |||
| 186 | #endif /* IPSEC */ | |||
| 187 | ||||
| 188 | ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 189 | finaldst = ip6->ip6_dst; | |||
| 190 | ||||
| 191 | #define MAKE_EXTHDR(hp, mp)do { if (hp) { struct ip6_ext *eh = (struct ip6_ext *)(hp); error = ip6_copyexthdr((mp), (caddr_t)(hp), ((eh)->ip6e_len + 1 ) << 3); if (error) goto freehdrs; } } while (0) \ | |||
| 192 | do { \ | |||
| 193 | if (hp) { \ | |||
| 194 | struct ip6_ext *eh = (struct ip6_ext *)(hp); \ | |||
| 195 | error = ip6_copyexthdr((mp), (caddr_t)(hp), \ | |||
| 196 | ((eh)->ip6e_len + 1) << 3); \ | |||
| 197 | if (error) \ | |||
| 198 | goto freehdrs; \ | |||
| 199 | } \ | |||
| 200 | } while (0) | |||
| 201 | ||||
| 202 | bzero(&exthdrs, sizeof(exthdrs))__builtin_bzero((&exthdrs), (sizeof(exthdrs))); | |||
| 203 | ||||
| 204 | if (opt) { | |||
| 205 | /* Hop-by-Hop options header */ | |||
| 206 | MAKE_EXTHDR(opt->ip6po_hbh, &exthdrs.ip6e_hbh)do { if (opt->ip6po_hbh) { struct ip6_ext *eh = (struct ip6_ext *)(opt->ip6po_hbh); error = ip6_copyexthdr((&exthdrs. ip6e_hbh), (caddr_t)(opt->ip6po_hbh), ((eh)->ip6e_len + 1) << 3); if (error) goto freehdrs; } } while (0); | |||
| 207 | /* Destination options header(1st part) */ | |||
| 208 | MAKE_EXTHDR(opt->ip6po_dest1, &exthdrs.ip6e_dest1)do { if (opt->ip6po_dest1) { struct ip6_ext *eh = (struct ip6_ext *)(opt->ip6po_dest1); error = ip6_copyexthdr((&exthdrs .ip6e_dest1), (caddr_t)(opt->ip6po_dest1), ((eh)->ip6e_len + 1) << 3); if (error) goto freehdrs; } } while (0); | |||
| 209 | /* Routing header */ | |||
| 210 | MAKE_EXTHDR(opt->ip6po_rthdr, &exthdrs.ip6e_rthdr)do { if (opt->ip6po_rhinfo.ip6po_rhi_rthdr) { struct ip6_ext *eh = (struct ip6_ext *)(opt->ip6po_rhinfo.ip6po_rhi_rthdr ); error = ip6_copyexthdr((&exthdrs.ip6e_rthdr), (caddr_t )(opt->ip6po_rhinfo.ip6po_rhi_rthdr), ((eh)->ip6e_len + 1) << 3); if (error) goto freehdrs; } } while (0); | |||
| 211 | /* Destination options header(2nd part) */ | |||
| 212 | MAKE_EXTHDR(opt->ip6po_dest2, &exthdrs.ip6e_dest2)do { if (opt->ip6po_dest2) { struct ip6_ext *eh = (struct ip6_ext *)(opt->ip6po_dest2); error = ip6_copyexthdr((&exthdrs .ip6e_dest2), (caddr_t)(opt->ip6po_dest2), ((eh)->ip6e_len + 1) << 3); if (error) goto freehdrs; } } while (0); | |||
| 213 | } | |||
| 214 | ||||
| 215 | #ifdef IPSEC1 | |||
| 216 | if (ipsec_in_use || seclevel != NULL((void *)0)) { | |||
| 217 | error = ip6_output_ipsec_lookup(m, seclevel, &tdb); | |||
| 218 | if (error) { | |||
| 219 | /* | |||
| 220 | * -EINVAL is used to indicate that the packet should | |||
| 221 | * be silently dropped, typically because we've asked | |||
| 222 | * key management for an SA. | |||
| 223 | */ | |||
| 224 | if (error == -EINVAL22) /* Should silently drop packet */ | |||
| 225 | error = 0; | |||
| 226 | ||||
| 227 | goto freehdrs; | |||
| 228 | } | |||
| 229 | } | |||
| 230 | #endif /* IPSEC */ | |||
| 231 | ||||
| 232 | /* | |||
| 233 | * Calculate the total length of the extension header chain. | |||
| 234 | * Keep the length of the unfragmentable part for fragmentation. | |||
| 235 | */ | |||
| 236 | optlen = 0; | |||
| 237 | if (exthdrs.ip6e_hbh) optlen += exthdrs.ip6e_hbh->m_lenm_hdr.mh_len; | |||
| 238 | if (exthdrs.ip6e_dest1) optlen += exthdrs.ip6e_dest1->m_lenm_hdr.mh_len; | |||
| 239 | if (exthdrs.ip6e_rthdr) optlen += exthdrs.ip6e_rthdr->m_lenm_hdr.mh_len; | |||
| 240 | unfragpartlen = optlen + sizeof(struct ip6_hdr); | |||
| 241 | /* NOTE: we don't add AH/ESP length here. do that later. */ | |||
| 242 | if (exthdrs.ip6e_dest2) optlen += exthdrs.ip6e_dest2->m_lenm_hdr.mh_len; | |||
| 243 | ||||
| 244 | /* | |||
| 245 | * If we need IPsec, or there is at least one extension header, | |||
| 246 | * separate IP6 header from the payload. | |||
| 247 | */ | |||
| 248 | if ((sproto || optlen) && !hdrsplit) { | |||
| 249 | if ((error = ip6_splithdr(m, &exthdrs)) != 0) { | |||
| 250 | m = NULL((void *)0); | |||
| 251 | goto freehdrs; | |||
| 252 | } | |||
| 253 | m = exthdrs.ip6e_ip6; | |||
| 254 | hdrsplit++; | |||
| 255 | } | |||
| 256 | ||||
| 257 | /* adjust pointer */ | |||
| 258 | ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 259 | ||||
| 260 | /* adjust mbuf packet header length */ | |||
| 261 | m->m_pkthdrM_dat.MH.MH_pkthdr.len += optlen; | |||
| 262 | plen = m->m_pkthdrM_dat.MH.MH_pkthdr.len - sizeof(*ip6); | |||
| 263 | ||||
| 264 | /* If this is a jumbo payload, insert a jumbo payload option. */ | |||
| 265 | if (plen > IPV6_MAXPACKET65535) { | |||
| 266 | if (!hdrsplit) { | |||
| 267 | if ((error = ip6_splithdr(m, &exthdrs)) != 0) { | |||
| 268 | m = NULL((void *)0); | |||
| 269 | goto freehdrs; | |||
| 270 | } | |||
| 271 | m = exthdrs.ip6e_ip6; | |||
| 272 | hdrsplit++; | |||
| 273 | } | |||
| 274 | /* adjust pointer */ | |||
| 275 | ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 276 | if ((error = ip6_insert_jumboopt(&exthdrs, plen)) != 0) | |||
| 277 | goto freehdrs; | |||
| 278 | ip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen = 0; | |||
| 279 | } else | |||
| 280 | ip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen = htons(plen)(__uint16_t)(__builtin_constant_p(plen) ? (__uint16_t)(((__uint16_t )(plen) & 0xffU) << 8 | ((__uint16_t)(plen) & 0xff00U ) >> 8) : __swap16md(plen)); | |||
| 281 | ||||
| 282 | /* | |||
| 283 | * Concatenate headers and fill in next header fields. | |||
| 284 | * Here we have, on "m" | |||
| 285 | * IPv6 payload | |||
| 286 | * and we insert headers accordingly. Finally, we should be getting: | |||
| 287 | * IPv6 hbh dest1 rthdr ah* [esp* dest2 payload] | |||
| 288 | * | |||
| 289 | * during the header composing process, "m" points to IPv6 header. | |||
| 290 | * "mprev" points to an extension header prior to esp. | |||
| 291 | */ | |||
| 292 | { | |||
| 293 | u_char *nexthdrp = &ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt; | |||
| 294 | struct mbuf *mprev = m; | |||
| 295 | ||||
| 296 | /* | |||
| 297 | * we treat dest2 specially. this makes IPsec processing | |||
| 298 | * much easier. the goal here is to make mprev point the | |||
| 299 | * mbuf prior to dest2. | |||
| 300 | * | |||
| 301 | * result: IPv6 dest2 payload | |||
| 302 | * m and mprev will point to IPv6 header. | |||
| 303 | */ | |||
| 304 | if (exthdrs.ip6e_dest2) { | |||
| 305 | if (!hdrsplit) | |||
| 306 | panic("%s: assumption failed: hdr not split", | |||
| 307 | __func__); | |||
| 308 | exthdrs.ip6e_dest2->m_nextm_hdr.mh_next = m->m_nextm_hdr.mh_next; | |||
| 309 | m->m_nextm_hdr.mh_next = exthdrs.ip6e_dest2; | |||
| 310 | *mtod(exthdrs.ip6e_dest2, u_char *)((u_char *)((exthdrs.ip6e_dest2)->m_hdr.mh_data)) = ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt; | |||
| 311 | ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_DSTOPTS60; | |||
| 312 | } | |||
| 313 | ||||
| 314 | #define MAKE_CHAIN(m, mp, p, i)do { if (m) { if (!hdrsplit) panic("assumption failed: hdr not split" ); *((u_char *)(((m))->m_hdr.mh_data)) = *(p); *(p) = (i); p = ((u_char *)(((m))->m_hdr.mh_data)); (m)->m_hdr.mh_next = (mp)->m_hdr.mh_next; (mp)->m_hdr.mh_next = (m); (mp) = (m); } } while (0)\ | |||
| 315 | do {\ | |||
| 316 | if (m) {\ | |||
| 317 | if (!hdrsplit) \ | |||
| 318 | panic("assumption failed: hdr not split"); \ | |||
| 319 | *mtod((m), u_char *)((u_char *)(((m))->m_hdr.mh_data)) = *(p);\ | |||
| 320 | *(p) = (i);\ | |||
| 321 | p = mtod((m), u_char *)((u_char *)(((m))->m_hdr.mh_data));\ | |||
| 322 | (m)->m_nextm_hdr.mh_next = (mp)->m_nextm_hdr.mh_next;\ | |||
| 323 | (mp)->m_nextm_hdr.mh_next = (m);\ | |||
| 324 | (mp) = (m);\ | |||
| 325 | }\ | |||
| 326 | } while (0) | |||
| 327 | /* | |||
| 328 | * result: IPv6 hbh dest1 rthdr dest2 payload | |||
| 329 | * m will point to IPv6 header. mprev will point to the | |||
| 330 | * extension header prior to dest2 (rthdr in the above case). | |||
| 331 | */ | |||
| 332 | MAKE_CHAIN(exthdrs.ip6e_hbh, mprev, nexthdrp, IPPROTO_HOPOPTS)do { if (exthdrs.ip6e_hbh) { if (!hdrsplit) panic("assumption failed: hdr not split" ); *((u_char *)(((exthdrs.ip6e_hbh))->m_hdr.mh_data)) = *( nexthdrp); *(nexthdrp) = (0); nexthdrp = ((u_char *)(((exthdrs .ip6e_hbh))->m_hdr.mh_data)); (exthdrs.ip6e_hbh)->m_hdr .mh_next = (mprev)->m_hdr.mh_next; (mprev)->m_hdr.mh_next = (exthdrs.ip6e_hbh); (mprev) = (exthdrs.ip6e_hbh); } } while (0); | |||
| 333 | MAKE_CHAIN(exthdrs.ip6e_dest1, mprev, nexthdrp,do { if (exthdrs.ip6e_dest1) { if (!hdrsplit) panic("assumption failed: hdr not split" ); *((u_char *)(((exthdrs.ip6e_dest1))->m_hdr.mh_data)) = * (nexthdrp); *(nexthdrp) = (60); nexthdrp = ((u_char *)(((exthdrs .ip6e_dest1))->m_hdr.mh_data)); (exthdrs.ip6e_dest1)->m_hdr .mh_next = (mprev)->m_hdr.mh_next; (mprev)->m_hdr.mh_next = (exthdrs.ip6e_dest1); (mprev) = (exthdrs.ip6e_dest1); } } while (0) | |||
| 334 | IPPROTO_DSTOPTS)do { if (exthdrs.ip6e_dest1) { if (!hdrsplit) panic("assumption failed: hdr not split" ); *((u_char *)(((exthdrs.ip6e_dest1))->m_hdr.mh_data)) = * (nexthdrp); *(nexthdrp) = (60); nexthdrp = ((u_char *)(((exthdrs .ip6e_dest1))->m_hdr.mh_data)); (exthdrs.ip6e_dest1)->m_hdr .mh_next = (mprev)->m_hdr.mh_next; (mprev)->m_hdr.mh_next = (exthdrs.ip6e_dest1); (mprev) = (exthdrs.ip6e_dest1); } } while (0); | |||
| 335 | MAKE_CHAIN(exthdrs.ip6e_rthdr, mprev, nexthdrp,do { if (exthdrs.ip6e_rthdr) { if (!hdrsplit) panic("assumption failed: hdr not split" ); *((u_char *)(((exthdrs.ip6e_rthdr))->m_hdr.mh_data)) = * (nexthdrp); *(nexthdrp) = (43); nexthdrp = ((u_char *)(((exthdrs .ip6e_rthdr))->m_hdr.mh_data)); (exthdrs.ip6e_rthdr)->m_hdr .mh_next = (mprev)->m_hdr.mh_next; (mprev)->m_hdr.mh_next = (exthdrs.ip6e_rthdr); (mprev) = (exthdrs.ip6e_rthdr); } } while (0) | |||
| 336 | IPPROTO_ROUTING)do { if (exthdrs.ip6e_rthdr) { if (!hdrsplit) panic("assumption failed: hdr not split" ); *((u_char *)(((exthdrs.ip6e_rthdr))->m_hdr.mh_data)) = * (nexthdrp); *(nexthdrp) = (43); nexthdrp = ((u_char *)(((exthdrs .ip6e_rthdr))->m_hdr.mh_data)); (exthdrs.ip6e_rthdr)->m_hdr .mh_next = (mprev)->m_hdr.mh_next; (mprev)->m_hdr.mh_next = (exthdrs.ip6e_rthdr); (mprev) = (exthdrs.ip6e_rthdr); } } while (0); | |||
| 337 | } | |||
| 338 | ||||
| 339 | /* | |||
| 340 | * If there is a routing header, replace the destination address field | |||
| 341 | * with the first hop of the routing header. | |||
| 342 | */ | |||
| 343 | if (exthdrs.ip6e_rthdr) { | |||
| 344 | struct ip6_rthdr *rh; | |||
| 345 | struct ip6_rthdr0 *rh0; | |||
| 346 | struct in6_addr *addr; | |||
| 347 | ||||
| 348 | rh = (struct ip6_rthdr *)(mtod(exthdrs.ip6e_rthdr,((struct ip6_rthdr *)((exthdrs.ip6e_rthdr)->m_hdr.mh_data) ) | |||
| 349 | struct ip6_rthdr *)((struct ip6_rthdr *)((exthdrs.ip6e_rthdr)->m_hdr.mh_data) )); | |||
| 350 | switch (rh->ip6r_type) { | |||
| 351 | case IPV6_RTHDR_TYPE_00: | |||
| 352 | rh0 = (struct ip6_rthdr0 *)rh; | |||
| 353 | addr = (struct in6_addr *)(rh0 + 1); | |||
| 354 | ip6->ip6_dst = addr[0]; | |||
| 355 | bcopy(&addr[1], &addr[0], | |||
| 356 | sizeof(struct in6_addr) * (rh0->ip6r0_segleft - 1)); | |||
| 357 | addr[rh0->ip6r0_segleft - 1] = finaldst; | |||
| 358 | break; | |||
| 359 | default: /* is it possible? */ | |||
| 360 | error = EINVAL22; | |||
| 361 | goto bad; | |||
| 362 | } | |||
| 363 | } | |||
| 364 | ||||
| 365 | /* Source address validation */ | |||
| 366 | if (!(flags & IPV6_UNSPECSRC0x01) && | |||
| 367 | IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)((*(const u_int32_t *)(const void *)(&(&ip6->ip6_src )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&ip6->ip6_src)->__u6_addr.__u6_addr8 [4]) == 0) && (*(const u_int32_t *)(const void *)(& (&ip6->ip6_src)->__u6_addr.__u6_addr8[8]) == 0) && (*(const u_int32_t *)(const void *)(&(&ip6->ip6_src )->__u6_addr.__u6_addr8[12]) == 0))) { | |||
| 368 | /* | |||
| 369 | * XXX: we can probably assume validation in the caller, but | |||
| 370 | * we explicitly check the address here for safety. | |||
| 371 | */ | |||
| 372 | error = EOPNOTSUPP45; | |||
| 373 | ip6stat_inc(ip6s_badscope); | |||
| 374 | goto bad; | |||
| 375 | } | |||
| 376 | if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_src)((&ip6->ip6_src)->__u6_addr.__u6_addr8[0] == 0xff)) { | |||
| 377 | error = EOPNOTSUPP45; | |||
| 378 | ip6stat_inc(ip6s_badscope); | |||
| 379 | goto bad; | |||
| 380 | } | |||
| 381 | ||||
| 382 | ip6stat_inc(ip6s_localout); | |||
| 383 | ||||
| 384 | /* | |||
| 385 | * Route packet. | |||
| 386 | */ | |||
| 387 | #if NPF1 > 0 | |||
| 388 | reroute: | |||
| 389 | #endif | |||
| 390 | ||||
| 391 | /* initialize cached route */ | |||
| 392 | if (ro == NULL((void *)0)) { | |||
| 393 | ro = &ip6route; | |||
| 394 | bzero((caddr_t)ro, sizeof(*ro))__builtin_bzero(((caddr_t)ro), (sizeof(*ro))); | |||
| 395 | } | |||
| 396 | ro_pmtu = ro; | |||
| 397 | if (opt && opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr) | |||
| 398 | ro = &opt->ip6po_routeip6po_rhinfo.ip6po_rhi_route; | |||
| 399 | dst = &ro->ro_dst; | |||
| 400 | ||||
| 401 | /* | |||
| 402 | * if specified, try to fill in the traffic class field. | |||
| 403 | * do not override if a non-zero value is already set. | |||
| 404 | * we check the diffserv field and the ecn field separately. | |||
| 405 | */ | |||
| 406 | if (opt && opt->ip6po_tclass >= 0) { | |||
| 407 | int mask = 0; | |||
| 408 | ||||
| 409 | if ((ip6->ip6_flowip6_ctlun.ip6_un1.ip6_un1_flow & htonl(0xfc << 20)(__uint32_t)(__builtin_constant_p(0xfc << 20) ? (__uint32_t )(((__uint32_t)(0xfc << 20) & 0xff) << 24 | ( (__uint32_t)(0xfc << 20) & 0xff00) << 8 | ((__uint32_t )(0xfc << 20) & 0xff0000) >> 8 | ((__uint32_t )(0xfc << 20) & 0xff000000) >> 24) : __swap32md (0xfc << 20))) == 0) | |||
| 410 | mask |= 0xfc; | |||
| 411 | if ((ip6->ip6_flowip6_ctlun.ip6_un1.ip6_un1_flow & htonl(0x03 << 20)(__uint32_t)(__builtin_constant_p(0x03 << 20) ? (__uint32_t )(((__uint32_t)(0x03 << 20) & 0xff) << 24 | ( (__uint32_t)(0x03 << 20) & 0xff00) << 8 | ((__uint32_t )(0x03 << 20) & 0xff0000) >> 8 | ((__uint32_t )(0x03 << 20) & 0xff000000) >> 24) : __swap32md (0x03 << 20))) == 0) | |||
| 412 | mask |= 0x03; | |||
| 413 | if (mask != 0) | |||
| 414 | ip6->ip6_flowip6_ctlun.ip6_un1.ip6_un1_flow |= | |||
| 415 | htonl((opt->ip6po_tclass & mask) << 20)(__uint32_t)(__builtin_constant_p((opt->ip6po_tclass & mask) << 20) ? (__uint32_t)(((__uint32_t)((opt->ip6po_tclass & mask) << 20) & 0xff) << 24 | ((__uint32_t )((opt->ip6po_tclass & mask) << 20) & 0xff00 ) << 8 | ((__uint32_t)((opt->ip6po_tclass & mask ) << 20) & 0xff0000) >> 8 | ((__uint32_t)((opt ->ip6po_tclass & mask) << 20) & 0xff000000) >> 24) : __swap32md((opt->ip6po_tclass & mask) << 20 )); | |||
| 416 | } | |||
| 417 | ||||
| 418 | /* fill in or override the hop limit field, if necessary. */ | |||
| 419 | if (opt && opt->ip6po_hlim != -1) | |||
| 420 | ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim = opt->ip6po_hlim & 0xff; | |||
| 421 | else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff)) { | |||
| 422 | if (im6o != NULL((void *)0)) | |||
| 423 | ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim = im6o->im6o_hlim; | |||
| 424 | else | |||
| 425 | ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim = ip6_defmcasthlim; | |||
| 426 | } | |||
| 427 | ||||
| 428 | #ifdef IPSEC1 | |||
| 429 | if (tdb != NULL((void *)0)) { | |||
| 430 | /* | |||
| 431 | * XXX what should we do if ip6_hlim == 0 and the | |||
| 432 | * packet gets tunneled? | |||
| 433 | */ | |||
| 434 | /* | |||
| 435 | * if we are source-routing, do not attempt to tunnel the | |||
| 436 | * packet just because ip6_dst is different from what tdb has. | |||
| 437 | * XXX | |||
| 438 | */ | |||
| 439 | error = ip6_output_ipsec_send(tdb, m, ro, | |||
| 440 | exthdrs.ip6e_rthdr ? 1 : 0, 0); | |||
| 441 | goto done; | |||
| 442 | } | |||
| 443 | #endif /* IPSEC */ | |||
| 444 | ||||
| 445 | bzero(&dstsock, sizeof(dstsock))__builtin_bzero((&dstsock), (sizeof(dstsock))); | |||
| 446 | dstsock.sin6_family = AF_INET624; | |||
| 447 | dstsock.sin6_addr = ip6->ip6_dst; | |||
| 448 | dstsock.sin6_len = sizeof(dstsock); | |||
| 449 | ro->ro_tableid = m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid; | |||
| 450 | ||||
| 451 | if (IN6_IS_ADDR_MULTICAST(&dstsock.sin6_addr)((&dstsock.sin6_addr)->__u6_addr.__u6_addr8[0] == 0xff )) { | |||
| 452 | struct in6_pktinfo *pi = NULL((void *)0); | |||
| 453 | ||||
| 454 | /* | |||
| 455 | * If the caller specify the outgoing interface | |||
| 456 | * explicitly, use it. | |||
| 457 | */ | |||
| 458 | if (opt != NULL((void *)0) && (pi = opt->ip6po_pktinfo) != NULL((void *)0)) | |||
| 459 | ifp = if_get(pi->ipi6_ifindex); | |||
| 460 | ||||
| 461 | if (ifp == NULL((void *)0) && im6o != NULL((void *)0)) | |||
| 462 | ifp = if_get(im6o->im6o_ifidx); | |||
| 463 | } | |||
| 464 | ||||
| 465 | if (ifp == NULL((void *)0)) { | |||
| 466 | rt = in6_selectroute(&dstsock, opt, ro, ro->ro_tableid); | |||
| 467 | if (rt == NULL((void *)0)) { | |||
| 468 | ip6stat_inc(ip6s_noroute); | |||
| 469 | error = EHOSTUNREACH65; | |||
| 470 | goto bad; | |||
| 471 | } | |||
| 472 | if (ISSET(rt->rt_flags, RTF_LOCAL)((rt->rt_flags) & (0x200000))) | |||
| 473 | ifp = if_get(rtable_loindex(m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid)); | |||
| 474 | else | |||
| 475 | ifp = if_get(rt->rt_ifidx); | |||
| 476 | /* | |||
| 477 | * We aren't using rtisvalid() here because the UP/DOWN state | |||
| 478 | * machine is broken with some Ethernet drivers like em(4). | |||
| 479 | * As a result we might try to use an invalid cached route | |||
| 480 | * entry while an interface is being detached. | |||
| 481 | */ | |||
| 482 | if (ifp == NULL((void *)0)) { | |||
| 483 | ip6stat_inc(ip6s_noroute); | |||
| 484 | error = EHOSTUNREACH65; | |||
| 485 | goto bad; | |||
| 486 | } | |||
| 487 | } else { | |||
| 488 | *dst = dstsock; | |||
| 489 | } | |||
| 490 | ||||
| 491 | if (rt && (rt->rt_flags & RTF_GATEWAY0x2) && | |||
| 492 | !IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff)) | |||
| 493 | dst = satosin6(rt->rt_gateway); | |||
| 494 | ||||
| 495 | if (!IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff)) { | |||
| 496 | /* Unicast */ | |||
| 497 | ||||
| 498 | m->m_flagsm_hdr.mh_flags &= ~(M_BCAST0x0100 | M_MCAST0x0200); /* just in case */ | |||
| 499 | } else { | |||
| 500 | /* Multicast */ | |||
| 501 | ||||
| 502 | m->m_flagsm_hdr.mh_flags = (m->m_flagsm_hdr.mh_flags & ~M_BCAST0x0100) | M_MCAST0x0200; | |||
| 503 | ||||
| 504 | /* | |||
| 505 | * Confirm that the outgoing interface supports multicast. | |||
| 506 | */ | |||
| 507 | if ((ifp->if_flags & IFF_MULTICAST0x8000) == 0) { | |||
| 508 | ip6stat_inc(ip6s_noroute); | |||
| 509 | error = ENETUNREACH51; | |||
| 510 | goto bad; | |||
| 511 | } | |||
| 512 | ||||
| 513 | if ((im6o == NULL((void *)0) || im6o->im6o_loop) && | |||
| 514 | in6_hasmulti(&ip6->ip6_dst, ifp)) { | |||
| 515 | /* | |||
| 516 | * If we belong to the destination multicast group | |||
| 517 | * on the outgoing interface, and the caller did not | |||
| 518 | * forbid loopback, loop back a copy. | |||
| 519 | * Can't defer TCP/UDP checksumming, do the | |||
| 520 | * computation now. | |||
| 521 | */ | |||
| 522 | in6_proto_cksum_out(m, NULL((void *)0)); | |||
| 523 | ip6_mloopback(ifp, m, dst); | |||
| 524 | } | |||
| 525 | #ifdef MROUTING1 | |||
| 526 | else { | |||
| 527 | /* | |||
| 528 | * If we are acting as a multicast router, perform | |||
| 529 | * multicast forwarding as if the packet had just | |||
| 530 | * arrived on the interface to which we are about | |||
| 531 | * to send. The multicast forwarding function | |||
| 532 | * recursively calls this function, using the | |||
| 533 | * IPV6_FORWARDING flag to prevent infinite recursion. | |||
| 534 | * | |||
| 535 | * Multicasts that are looped back by ip6_mloopback(), | |||
| 536 | * above, will be forwarded by the ip6_input() routine, | |||
| 537 | * if necessary. | |||
| 538 | */ | |||
| 539 | if (ip6_mforwarding && ip6_mrouter[ifp->if_rdomainif_data.ifi_rdomain] && | |||
| 540 | (flags & IPV6_FORWARDING0x02) == 0) { | |||
| 541 | if (ip6_mforward(ip6, ifp, m) != 0) { | |||
| 542 | m_freem(m); | |||
| 543 | goto done; | |||
| 544 | } | |||
| 545 | } | |||
| 546 | } | |||
| 547 | #endif | |||
| 548 | /* | |||
| 549 | * Multicasts with a hoplimit of zero may be looped back, | |||
| 550 | * above, but must not be transmitted on a network. | |||
| 551 | * Also, multicasts addressed to the loopback interface | |||
| 552 | * are not sent -- the above call to ip6_mloopback() will | |||
| 553 | * loop back a copy if this host actually belongs to the | |||
| 554 | * destination group on the loopback interface. | |||
| 555 | */ | |||
| 556 | if (ip6->ip6_hlimip6_ctlun.ip6_un1.ip6_un1_hlim == 0 || (ifp->if_flags & IFF_LOOPBACK0x8) || | |||
| 557 | IN6_IS_ADDR_MC_INTFACELOCAL(&ip6->ip6_dst)(((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff) && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8 [1] & 0x0f) == 0x01))) { | |||
| 558 | m_freem(m); | |||
| 559 | goto done; | |||
| 560 | } | |||
| 561 | } | |||
| 562 | ||||
| 563 | /* | |||
| 564 | * If this packet is going through a loopback interface we won't | |||
| 565 | * be able to restore its scope ID using the interface index. | |||
| 566 | */ | |||
| 567 | if (IN6_IS_SCOPE_EMBED(&ip6->ip6_src)(((((&ip6->ip6_src)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ip6->ip6_src)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) || ((((&ip6->ip6_src)->__u6_addr .__u6_addr8[0] == 0xff) && (((&ip6->ip6_src)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((&ip6 ->ip6_src)->__u6_addr.__u6_addr8[0] == 0xff) && (((&ip6->ip6_src)->__u6_addr.__u6_addr8[1] & 0x0f ) == 0x01))))) { | |||
| 568 | if (ifp->if_flags & IFF_LOOPBACK0x8) | |||
| 569 | src_scope = ip6->ip6_src.s6_addr16__u6_addr.__u6_addr16[1]; | |||
| 570 | ip6->ip6_src.s6_addr16__u6_addr.__u6_addr16[1] = 0; | |||
| 571 | } | |||
| 572 | if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst)(((((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) || ((((&ip6->ip6_dst)->__u6_addr .__u6_addr8[0] == 0xff) && (((&ip6->ip6_dst)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((&ip6 ->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff) && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8[1] & 0x0f ) == 0x01))))) { | |||
| 573 | if (ifp->if_flags & IFF_LOOPBACK0x8) | |||
| 574 | dst_scope = ip6->ip6_dst.s6_addr16__u6_addr.__u6_addr16[1]; | |||
| 575 | ip6->ip6_dst.s6_addr16__u6_addr.__u6_addr16[1] = 0; | |||
| 576 | } | |||
| 577 | ||||
| 578 | /* Determine path MTU. */ | |||
| 579 | if ((error = ip6_getpmtu(ro_pmtu->ro_rt, ifp, &mtu)) != 0) | |||
| 580 | goto bad; | |||
| 581 | ||||
| 582 | /* | |||
| 583 | * The caller of this function may specify to use the minimum MTU | |||
| 584 | * in some cases. | |||
| 585 | * An advanced API option (IPV6_USE_MIN_MTU) can also override MTU | |||
| 586 | * setting. The logic is a bit complicated; by default, unicast | |||
| 587 | * packets will follow path MTU while multicast packets will be sent at | |||
| 588 | * the minimum MTU. If IP6PO_MINMTU_ALL is specified, all packets | |||
| 589 | * including unicast ones will be sent at the minimum MTU. Multicast | |||
| 590 | * packets will always be sent at the minimum MTU unless | |||
| 591 | * IP6PO_MINMTU_DISABLE is explicitly specified. | |||
| 592 | * See RFC 3542 for more details. | |||
| 593 | */ | |||
| 594 | if (mtu > IPV6_MMTU1280) { | |||
| 595 | if ((flags & IPV6_MINMTU0x04)) | |||
| 596 | mtu = IPV6_MMTU1280; | |||
| 597 | else if (opt && opt->ip6po_minmtu == IP6PO_MINMTU_ALL1) | |||
| 598 | mtu = IPV6_MMTU1280; | |||
| 599 | else if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst)((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff) && (opt == NULL((void *)0) || | |||
| 600 | opt->ip6po_minmtu != IP6PO_MINMTU_DISABLE0)) { | |||
| 601 | mtu = IPV6_MMTU1280; | |||
| 602 | } | |||
| 603 | } | |||
| 604 | ||||
| 605 | /* | |||
| 606 | * If the outgoing packet contains a hop-by-hop options header, | |||
| 607 | * it must be examined and processed even by the source node. | |||
| 608 | * (RFC 2460, section 4.) | |||
| 609 | */ | |||
| 610 | if (exthdrs.ip6e_hbh) { | |||
| 611 | struct ip6_hbh *hbh = mtod(exthdrs.ip6e_hbh, struct ip6_hbh *)((struct ip6_hbh *)((exthdrs.ip6e_hbh)->m_hdr.mh_data)); | |||
| 612 | u_int32_t rtalert; /* returned value is ignored */ | |||
| 613 | u_int32_t plen = 0; /* no more than 1 jumbo payload option! */ | |||
| 614 | ||||
| 615 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_ifidx = ifp->if_index; | |||
| 616 | if (ip6_process_hopopts(&m, (u_int8_t *)(hbh + 1), | |||
| 617 | ((hbh->ip6h_len + 1) << 3) - sizeof(struct ip6_hbh), | |||
| 618 | &rtalert, &plen) < 0) { | |||
| 619 | /* m was already freed at this point */ | |||
| 620 | error = EINVAL22;/* better error? */ | |||
| 621 | goto done; | |||
| 622 | } | |||
| 623 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_ifidx = 0; | |||
| 624 | } | |||
| 625 | ||||
| 626 | #if NPF1 > 0 | |||
| 627 | if (pf_test(AF_INET624, PF_OUT, ifp, &m) != PF_PASS) { | |||
| 628 | error = EACCES13; | |||
| 629 | m_freem(m); | |||
| 630 | goto done; | |||
| 631 | } | |||
| 632 | if (m == NULL((void *)0)) | |||
| 633 | goto done; | |||
| 634 | ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 635 | if ((m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags & (PF_TAG_REROUTE0x20 | PF_TAG_GENERATED0x01)) == | |||
| 636 | (PF_TAG_REROUTE0x20 | PF_TAG_GENERATED0x01)) { | |||
| 637 | /* already rerun the route lookup, go on */ | |||
| 638 | m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags &= ~(PF_TAG_GENERATED0x01 | PF_TAG_REROUTE0x20); | |||
| 639 | } else if (m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags & PF_TAG_REROUTE0x20) { | |||
| 640 | /* tag as generated to skip over pf_test on rerun */ | |||
| 641 | m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags |= PF_TAG_GENERATED0x01; | |||
| 642 | finaldst = ip6->ip6_dst; | |||
| 643 | ro = NULL((void *)0); | |||
| 644 | if_put(ifp); /* drop reference since destination changed */ | |||
| 645 | ifp = NULL((void *)0); | |||
| 646 | goto reroute; | |||
| 647 | } | |||
| 648 | #endif | |||
| 649 | ||||
| 650 | /* | |||
| 651 | * If the packet is not going on the wire it can be destined | |||
| 652 | * to any local address. In this case do not clear its scopes | |||
| 653 | * to let ip6_input() find a matching local route. | |||
| 654 | */ | |||
| 655 | if (ifp->if_flags & IFF_LOOPBACK0x8) { | |||
| 656 | if (IN6_IS_SCOPE_EMBED(&ip6->ip6_src)(((((&ip6->ip6_src)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ip6->ip6_src)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) || ((((&ip6->ip6_src)->__u6_addr .__u6_addr8[0] == 0xff) && (((&ip6->ip6_src)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((&ip6 ->ip6_src)->__u6_addr.__u6_addr8[0] == 0xff) && (((&ip6->ip6_src)->__u6_addr.__u6_addr8[1] & 0x0f ) == 0x01))))) | |||
| 657 | ip6->ip6_src.s6_addr16__u6_addr.__u6_addr16[1] = src_scope; | |||
| 658 | if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst)(((((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) || ((((&ip6->ip6_dst)->__u6_addr .__u6_addr8[0] == 0xff) && (((&ip6->ip6_dst)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((&ip6 ->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff) && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8[1] & 0x0f ) == 0x01))))) | |||
| 659 | ip6->ip6_dst.s6_addr16__u6_addr.__u6_addr16[1] = dst_scope; | |||
| 660 | } | |||
| 661 | ||||
| 662 | /* | |||
| 663 | * Send the packet to the outgoing interface. | |||
| 664 | * If necessary, do IPv6 fragmentation before sending. | |||
| 665 | * | |||
| 666 | * the logic here is rather complex: | |||
| 667 | * 1: normal case (dontfrag == 0) | |||
| 668 | * 1-a: send as is if tlen <= path mtu | |||
| 669 | * 1-b: fragment if tlen > path mtu | |||
| 670 | * | |||
| 671 | * 2: if user asks us not to fragment (dontfrag == 1) | |||
| 672 | * 2-a: send as is if tlen <= interface mtu | |||
| 673 | * 2-b: error if tlen > interface mtu | |||
| 674 | */ | |||
| 675 | tlen = ISSET(m->m_pkthdr.csum_flags, M_TCP_TSO)((m->M_dat.MH.MH_pkthdr.csum_flags) & (0x8000)) ? | |||
| 676 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_mss : m->m_pkthdrM_dat.MH.MH_pkthdr.len; | |||
| 677 | ||||
| 678 | if (ISSET(m->m_pkthdr.csum_flags, M_IPV6_DF_OUT)((m->M_dat.MH.MH_pkthdr.csum_flags) & (0x1000))) { | |||
| 679 | CLR(m->m_pkthdr.csum_flags, M_IPV6_DF_OUT)((m->M_dat.MH.MH_pkthdr.csum_flags) &= ~(0x1000)); | |||
| 680 | dontfrag = 1; | |||
| 681 | } else if (opt && ISSET(opt->ip6po_flags, IP6PO_DONTFRAG)((opt->ip6po_flags) & (0x04))) | |||
| 682 | dontfrag = 1; | |||
| 683 | else | |||
| 684 | dontfrag = 0; | |||
| 685 | ||||
| 686 | if (dontfrag && tlen > ifp->if_mtuif_data.ifi_mtu) { /* case 2-b */ | |||
| 687 | #ifdef IPSEC1 | |||
| 688 | if (ip_mtudisc) | |||
| 689 | ipsec_adjust_mtu(m, mtu); | |||
| 690 | #endif | |||
| 691 | error = EMSGSIZE40; | |||
| 692 | goto bad; | |||
| 693 | } | |||
| 694 | ||||
| 695 | /* | |||
| 696 | * transmit packet without fragmentation | |||
| 697 | */ | |||
| 698 | if (dontfrag || tlen <= mtu) { /* case 1-a and 2-a */ | |||
| 699 | error = if_output_tso(ifp, &m, sin6tosa(dst), ro->ro_rt, | |||
| 700 | ifp->if_mtuif_data.ifi_mtu); | |||
| 701 | if (error || m == NULL((void *)0)) | |||
| 702 | goto done; | |||
| 703 | goto bad; /* should not happen */ | |||
| 704 | } | |||
| 705 | ||||
| 706 | /* | |||
| 707 | * try to fragment the packet. case 1-b | |||
| 708 | */ | |||
| 709 | if (mtu < IPV6_MMTU1280) { | |||
| 710 | /* path MTU cannot be less than IPV6_MMTU */ | |||
| 711 | error = EMSGSIZE40; | |||
| 712 | goto bad; | |||
| 713 | } else if (ip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen == 0) { | |||
| 714 | /* jumbo payload cannot be fragmented */ | |||
| 715 | error = EMSGSIZE40; | |||
| 716 | goto bad; | |||
| 717 | } | |||
| 718 | ||||
| 719 | /* | |||
| 720 | * Too large for the destination or interface; | |||
| 721 | * fragment if possible. | |||
| 722 | * Must be able to put at least 8 bytes per fragment. | |||
| 723 | */ | |||
| 724 | hlen = unfragpartlen; | |||
| 725 | if (mtu > IPV6_MAXPACKET65535) | |||
| 726 | mtu = IPV6_MAXPACKET65535; | |||
| 727 | ||||
| 728 | /* | |||
| 729 | * If we are doing fragmentation, we can't defer TCP/UDP | |||
| 730 | * checksumming; compute the checksum and clear the flag. | |||
| 731 | */ | |||
| 732 | in6_proto_cksum_out(m, NULL((void *)0)); | |||
| 733 | ||||
| 734 | /* | |||
| 735 | * Change the next header field of the last header in the | |||
| 736 | * unfragmentable part. | |||
| 737 | */ | |||
| 738 | if (exthdrs.ip6e_rthdr) { | |||
| 739 | nextproto = *mtod(exthdrs.ip6e_rthdr, u_char *)((u_char *)((exthdrs.ip6e_rthdr)->m_hdr.mh_data)); | |||
| 740 | *mtod(exthdrs.ip6e_rthdr, u_char *)((u_char *)((exthdrs.ip6e_rthdr)->m_hdr.mh_data)) = IPPROTO_FRAGMENT44; | |||
| 741 | } else if (exthdrs.ip6e_dest1) { | |||
| 742 | nextproto = *mtod(exthdrs.ip6e_dest1, u_char *)((u_char *)((exthdrs.ip6e_dest1)->m_hdr.mh_data)); | |||
| 743 | *mtod(exthdrs.ip6e_dest1, u_char *)((u_char *)((exthdrs.ip6e_dest1)->m_hdr.mh_data)) = IPPROTO_FRAGMENT44; | |||
| 744 | } else if (exthdrs.ip6e_hbh) { | |||
| 745 | nextproto = *mtod(exthdrs.ip6e_hbh, u_char *)((u_char *)((exthdrs.ip6e_hbh)->m_hdr.mh_data)); | |||
| 746 | *mtod(exthdrs.ip6e_hbh, u_char *)((u_char *)((exthdrs.ip6e_hbh)->m_hdr.mh_data)) = IPPROTO_FRAGMENT44; | |||
| 747 | } else { | |||
| 748 | nextproto = ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt; | |||
| 749 | ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt = IPPROTO_FRAGMENT44; | |||
| 750 | } | |||
| 751 | ||||
| 752 | if ((error = ip6_fragment(m, &ml, hlen, nextproto, mtu)) || | |||
| 753 | (error = if_output_ml(ifp, &ml, sin6tosa(dst), ro->ro_rt))) | |||
| 754 | goto done; | |||
| 755 | ip6stat_inc(ip6s_fragmented); | |||
| 756 | ||||
| 757 | done: | |||
| 758 | if (ro == &ip6route && ro->ro_rt) { | |||
| 759 | rtfree(ro->ro_rt); | |||
| 760 | } else if (ro_pmtu == &ip6route && ro_pmtu->ro_rt) { | |||
| 761 | rtfree(ro_pmtu->ro_rt); | |||
| 762 | } | |||
| 763 | if_put(ifp); | |||
| 764 | #ifdef IPSEC1 | |||
| 765 | tdb_unref(tdb); | |||
| 766 | #endif /* IPSEC */ | |||
| 767 | return (error); | |||
| 768 | ||||
| 769 | freehdrs: | |||
| 770 | m_freem(exthdrs.ip6e_hbh); /* m_freem will check if mbuf is 0 */ | |||
| 771 | m_freem(exthdrs.ip6e_dest1); | |||
| 772 | m_freem(exthdrs.ip6e_rthdr); | |||
| 773 | m_freem(exthdrs.ip6e_dest2); | |||
| 774 | /* FALLTHROUGH */ | |||
| 775 | bad: | |||
| 776 | m_freem(m); | |||
| 777 | goto done; | |||
| 778 | } | |||
| 779 | ||||
| 780 | int | |||
| 781 | ip6_fragment(struct mbuf *m0, struct mbuf_list *ml, int hlen, u_char nextproto, | |||
| 782 | u_long mtu) | |||
| 783 | { | |||
| 784 | struct ip6_hdr *ip6; | |||
| 785 | u_int32_t id; | |||
| 786 | int tlen, len, off; | |||
| 787 | int error; | |||
| 788 | ||||
| 789 | ml_init(ml); | |||
| 790 | ||||
| 791 | ip6 = mtod(m0, struct ip6_hdr *)((struct ip6_hdr *)((m0)->m_hdr.mh_data)); | |||
| 792 | tlen = m0->m_pkthdrM_dat.MH.MH_pkthdr.len; | |||
| 793 | len = (mtu - hlen - sizeof(struct ip6_frag)) & ~7; | |||
| 794 | if (len < 8) { | |||
| 795 | error = EMSGSIZE40; | |||
| 796 | goto bad; | |||
| 797 | } | |||
| 798 | id = htonl(ip6_randomid())(__uint32_t)(__builtin_constant_p(ip6_randomid()) ? (__uint32_t )(((__uint32_t)(ip6_randomid()) & 0xff) << 24 | ((__uint32_t )(ip6_randomid()) & 0xff00) << 8 | ((__uint32_t)(ip6_randomid ()) & 0xff0000) >> 8 | ((__uint32_t)(ip6_randomid() ) & 0xff000000) >> 24) : __swap32md(ip6_randomid()) ); | |||
| 799 | ||||
| 800 | /* | |||
| 801 | * Loop through length of payload, | |||
| 802 | * make new header and copy data of each part and link onto chain. | |||
| 803 | */ | |||
| 804 | for (off = hlen; off < tlen; off += len) { | |||
| 805 | struct mbuf *m; | |||
| 806 | struct mbuf *mlast; | |||
| 807 | struct ip6_hdr *mhip6; | |||
| 808 | struct ip6_frag *ip6f; | |||
| 809 | ||||
| 810 | MGETHDR(m, M_DONTWAIT, MT_HEADER)m = m_gethdr((0x0002), (2)); | |||
| 811 | if (m == NULL((void *)0)) { | |||
| 812 | error = ENOBUFS55; | |||
| 813 | goto bad; | |||
| 814 | } | |||
| 815 | ml_enqueue(ml, m); | |||
| 816 | if ((error = m_dup_pkthdr(m, m0, M_DONTWAIT0x0002)) != 0) | |||
| 817 | goto bad; | |||
| 818 | m->m_datam_hdr.mh_data += max_linkhdr; | |||
| 819 | mhip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 820 | *mhip6 = *ip6; | |||
| 821 | m->m_lenm_hdr.mh_len = sizeof(struct ip6_hdr); | |||
| 822 | ||||
| 823 | if ((error = ip6_insertfraghdr(m0, m, hlen, &ip6f)) != 0) | |||
| 824 | goto bad; | |||
| 825 | ip6f->ip6f_offlg = htons((off - hlen) & ~7)(__uint16_t)(__builtin_constant_p((off - hlen) & ~7) ? (__uint16_t )(((__uint16_t)((off - hlen) & ~7) & 0xffU) << 8 | ((__uint16_t)((off - hlen) & ~7) & 0xff00U) >> 8) : __swap16md((off - hlen) & ~7)); | |||
| 826 | if (off + len >= tlen) | |||
| 827 | len = tlen - off; | |||
| 828 | else | |||
| 829 | ip6f->ip6f_offlg |= IP6F_MORE_FRAG0x0100; | |||
| 830 | ||||
| 831 | m->m_pkthdrM_dat.MH.MH_pkthdr.len = hlen + sizeof(struct ip6_frag) + len; | |||
| 832 | mhip6->ip6_plenip6_ctlun.ip6_un1.ip6_un1_plen = htons(m->m_pkthdr.len -(__uint16_t)(__builtin_constant_p(m->M_dat.MH.MH_pkthdr.len - sizeof(struct ip6_hdr)) ? (__uint16_t)(((__uint16_t)(m-> M_dat.MH.MH_pkthdr.len - sizeof(struct ip6_hdr)) & 0xffU) << 8 | ((__uint16_t)(m->M_dat.MH.MH_pkthdr.len - sizeof (struct ip6_hdr)) & 0xff00U) >> 8) : __swap16md(m-> M_dat.MH.MH_pkthdr.len - sizeof(struct ip6_hdr))) | |||
| 833 | sizeof(struct ip6_hdr))(__uint16_t)(__builtin_constant_p(m->M_dat.MH.MH_pkthdr.len - sizeof(struct ip6_hdr)) ? (__uint16_t)(((__uint16_t)(m-> M_dat.MH.MH_pkthdr.len - sizeof(struct ip6_hdr)) & 0xffU) << 8 | ((__uint16_t)(m->M_dat.MH.MH_pkthdr.len - sizeof (struct ip6_hdr)) & 0xff00U) >> 8) : __swap16md(m-> M_dat.MH.MH_pkthdr.len - sizeof(struct ip6_hdr))); | |||
| 834 | for (mlast = m; mlast->m_nextm_hdr.mh_next; mlast = mlast->m_nextm_hdr.mh_next) | |||
| 835 | ; | |||
| 836 | mlast->m_nextm_hdr.mh_next = m_copym(m0, off, len, M_DONTWAIT0x0002); | |||
| 837 | if (mlast->m_nextm_hdr.mh_next == NULL((void *)0)) { | |||
| 838 | error = ENOBUFS55; | |||
| 839 | goto bad; | |||
| 840 | } | |||
| 841 | ||||
| 842 | ip6f->ip6f_reserved = 0; | |||
| 843 | ip6f->ip6f_ident = id; | |||
| 844 | ip6f->ip6f_nxt = nextproto; | |||
| 845 | } | |||
| 846 | ||||
| 847 | ip6stat_add(ip6s_ofragments, ml_len(ml)((ml)->ml_len)); | |||
| 848 | m_freem(m0); | |||
| 849 | return (0); | |||
| 850 | ||||
| 851 | bad: | |||
| 852 | ip6stat_inc(ip6s_odropped); | |||
| 853 | ml_purge(ml); | |||
| 854 | m_freem(m0); | |||
| 855 | return (error); | |||
| 856 | } | |||
| 857 | ||||
| 858 | int | |||
| 859 | ip6_copyexthdr(struct mbuf **mp, caddr_t hdr, int hlen) | |||
| 860 | { | |||
| 861 | struct mbuf *m; | |||
| 862 | ||||
| 863 | if (hlen > MCLBYTES(1 << 11)) | |||
| 864 | return (ENOBUFS55); /* XXX */ | |||
| 865 | ||||
| 866 | MGET(m, M_DONTWAIT, MT_DATA)m = m_get((0x0002), (1)); | |||
| 867 | if (!m) | |||
| 868 | return (ENOBUFS55); | |||
| 869 | ||||
| 870 | if (hlen > MLEN(256 - sizeof(struct m_hdr))) { | |||
| 871 | MCLGET(m, M_DONTWAIT)(void) m_clget((m), (0x0002), (1 << 11)); | |||
| 872 | if ((m->m_flagsm_hdr.mh_flags & M_EXT0x0001) == 0) { | |||
| 873 | m_free(m); | |||
| 874 | return (ENOBUFS55); | |||
| 875 | } | |||
| 876 | } | |||
| 877 | m->m_lenm_hdr.mh_len = hlen; | |||
| 878 | if (hdr) | |||
| 879 | memcpy(mtod(m, caddr_t), hdr, hlen)__builtin_memcpy((((caddr_t)((m)->m_hdr.mh_data))), (hdr), (hlen)); | |||
| 880 | ||||
| 881 | *mp = m; | |||
| 882 | return (0); | |||
| 883 | } | |||
| 884 | ||||
| 885 | /* | |||
| 886 | * Insert jumbo payload option. | |||
| 887 | */ | |||
| 888 | int | |||
| 889 | ip6_insert_jumboopt(struct ip6_exthdrs *exthdrs, u_int32_t plen) | |||
| 890 | { | |||
| 891 | struct mbuf *mopt; | |||
| 892 | u_int8_t *optbuf; | |||
| 893 | u_int32_t v; | |||
| 894 | ||||
| 895 | #define JUMBOOPTLEN 8 /* length of jumbo payload option and padding */ | |||
| 896 | ||||
| 897 | /* | |||
| 898 | * If there is no hop-by-hop options header, allocate new one. | |||
| 899 | * If there is one but it doesn't have enough space to store the | |||
| 900 | * jumbo payload option, allocate a cluster to store the whole options. | |||
| 901 | * Otherwise, use it to store the options. | |||
| 902 | */ | |||
| 903 | if (exthdrs->ip6e_hbh == 0) { | |||
| 904 | MGET(mopt, M_DONTWAIT, MT_DATA)mopt = m_get((0x0002), (1)); | |||
| 905 | if (mopt == NULL((void *)0)) | |||
| 906 | return (ENOBUFS55); | |||
| 907 | mopt->m_lenm_hdr.mh_len = JUMBOOPTLEN; | |||
| 908 | optbuf = mtod(mopt, u_int8_t *)((u_int8_t *)((mopt)->m_hdr.mh_data)); | |||
| 909 | optbuf[1] = 0; /* = ((JUMBOOPTLEN) >> 3) - 1 */ | |||
| 910 | exthdrs->ip6e_hbh = mopt; | |||
| 911 | } else { | |||
| 912 | struct ip6_hbh *hbh; | |||
| 913 | ||||
| 914 | mopt = exthdrs->ip6e_hbh; | |||
| 915 | if (m_trailingspace(mopt) < JUMBOOPTLEN) { | |||
| 916 | /* | |||
| 917 | * XXX assumption: | |||
| 918 | * - exthdrs->ip6e_hbh is not referenced from places | |||
| 919 | * other than exthdrs. | |||
| 920 | * - exthdrs->ip6e_hbh is not an mbuf chain. | |||
| 921 | */ | |||
| 922 | int oldoptlen = mopt->m_lenm_hdr.mh_len; | |||
| 923 | struct mbuf *n; | |||
| 924 | ||||
| 925 | /* | |||
| 926 | * XXX: give up if the whole (new) hbh header does | |||
| 927 | * not fit even in an mbuf cluster. | |||
| 928 | */ | |||
| 929 | if (oldoptlen + JUMBOOPTLEN > MCLBYTES(1 << 11)) | |||
| 930 | return (ENOBUFS55); | |||
| 931 | ||||
| 932 | /* | |||
| 933 | * As a consequence, we must always prepare a cluster | |||
| 934 | * at this point. | |||
| 935 | */ | |||
| 936 | MGET(n, M_DONTWAIT, MT_DATA)n = m_get((0x0002), (1)); | |||
| 937 | if (n) { | |||
| 938 | MCLGET(n, M_DONTWAIT)(void) m_clget((n), (0x0002), (1 << 11)); | |||
| 939 | if ((n->m_flagsm_hdr.mh_flags & M_EXT0x0001) == 0) { | |||
| 940 | m_freem(n); | |||
| 941 | n = NULL((void *)0); | |||
| 942 | } | |||
| 943 | } | |||
| 944 | if (!n) | |||
| 945 | return (ENOBUFS55); | |||
| 946 | n->m_lenm_hdr.mh_len = oldoptlen + JUMBOOPTLEN; | |||
| 947 | memcpy(mtod(n, caddr_t), mtod(mopt, caddr_t),__builtin_memcpy((((caddr_t)((n)->m_hdr.mh_data))), (((caddr_t )((mopt)->m_hdr.mh_data))), (oldoptlen)) | |||
| 948 | oldoptlen)__builtin_memcpy((((caddr_t)((n)->m_hdr.mh_data))), (((caddr_t )((mopt)->m_hdr.mh_data))), (oldoptlen)); | |||
| 949 | optbuf = mtod(n, u_int8_t *)((u_int8_t *)((n)->m_hdr.mh_data)) + oldoptlen; | |||
| 950 | m_freem(mopt); | |||
| 951 | mopt = exthdrs->ip6e_hbh = n; | |||
| 952 | } else { | |||
| 953 | optbuf = mtod(mopt, u_int8_t *)((u_int8_t *)((mopt)->m_hdr.mh_data)) + mopt->m_lenm_hdr.mh_len; | |||
| 954 | mopt->m_lenm_hdr.mh_len += JUMBOOPTLEN; | |||
| 955 | } | |||
| 956 | optbuf[0] = IP6OPT_PADN0x01; | |||
| 957 | optbuf[1] = 0; | |||
| 958 | ||||
| 959 | /* | |||
| 960 | * Adjust the header length according to the pad and | |||
| 961 | * the jumbo payload option. | |||
| 962 | */ | |||
| 963 | hbh = mtod(mopt, struct ip6_hbh *)((struct ip6_hbh *)((mopt)->m_hdr.mh_data)); | |||
| 964 | hbh->ip6h_len += (JUMBOOPTLEN >> 3); | |||
| 965 | } | |||
| 966 | ||||
| 967 | /* fill in the option. */ | |||
| 968 | optbuf[2] = IP6OPT_JUMBO0xC2; | |||
| 969 | optbuf[3] = 4; | |||
| 970 | v = (u_int32_t)htonl(plen + JUMBOOPTLEN)(__uint32_t)(__builtin_constant_p(plen + JUMBOOPTLEN) ? (__uint32_t )(((__uint32_t)(plen + JUMBOOPTLEN) & 0xff) << 24 | ((__uint32_t)(plen + JUMBOOPTLEN) & 0xff00) << 8 | ((__uint32_t)(plen + JUMBOOPTLEN) & 0xff0000) >> 8 | ((__uint32_t)(plen + JUMBOOPTLEN) & 0xff000000) >> 24) : __swap32md(plen + JUMBOOPTLEN)); | |||
| 971 | memcpy(&optbuf[4], &v, sizeof(u_int32_t))__builtin_memcpy((&optbuf[4]), (&v), (sizeof(u_int32_t ))); | |||
| 972 | ||||
| 973 | /* finally, adjust the packet header length */ | |||
| 974 | exthdrs->ip6e_ip6->m_pkthdrM_dat.MH.MH_pkthdr.len += JUMBOOPTLEN; | |||
| 975 | ||||
| 976 | return (0); | |||
| 977 | #undef JUMBOOPTLEN | |||
| 978 | } | |||
| 979 | ||||
| 980 | /* | |||
| 981 | * Insert fragment header and copy unfragmentable header portions. | |||
| 982 | */ | |||
| 983 | int | |||
| 984 | ip6_insertfraghdr(struct mbuf *m0, struct mbuf *m, int hlen, | |||
| 985 | struct ip6_frag **frghdrp) | |||
| 986 | { | |||
| 987 | struct mbuf *n, *mlast; | |||
| 988 | ||||
| 989 | if (hlen > sizeof(struct ip6_hdr)) { | |||
| 990 | n = m_copym(m0, sizeof(struct ip6_hdr), | |||
| 991 | hlen - sizeof(struct ip6_hdr), M_DONTWAIT0x0002); | |||
| 992 | if (n == NULL((void *)0)) | |||
| 993 | return (ENOBUFS55); | |||
| 994 | m->m_nextm_hdr.mh_next = n; | |||
| 995 | } else | |||
| 996 | n = m; | |||
| 997 | ||||
| 998 | /* Search for the last mbuf of unfragmentable part. */ | |||
| 999 | for (mlast = n; mlast->m_nextm_hdr.mh_next; mlast = mlast->m_nextm_hdr.mh_next) | |||
| 1000 | ; | |||
| 1001 | ||||
| 1002 | if ((mlast->m_flagsm_hdr.mh_flags & M_EXT0x0001) == 0 && | |||
| 1003 | m_trailingspace(mlast) >= sizeof(struct ip6_frag)) { | |||
| 1004 | /* use the trailing space of the last mbuf for fragment hdr */ | |||
| 1005 | *frghdrp = (struct ip6_frag *)(mtod(mlast, caddr_t)((caddr_t)((mlast)->m_hdr.mh_data)) + | |||
| 1006 | mlast->m_lenm_hdr.mh_len); | |||
| 1007 | mlast->m_lenm_hdr.mh_len += sizeof(struct ip6_frag); | |||
| 1008 | m->m_pkthdrM_dat.MH.MH_pkthdr.len += sizeof(struct ip6_frag); | |||
| 1009 | } else { | |||
| 1010 | /* allocate a new mbuf for the fragment header */ | |||
| 1011 | struct mbuf *mfrg; | |||
| 1012 | ||||
| 1013 | MGET(mfrg, M_DONTWAIT, MT_DATA)mfrg = m_get((0x0002), (1)); | |||
| 1014 | if (mfrg == NULL((void *)0)) | |||
| 1015 | return (ENOBUFS55); | |||
| 1016 | mfrg->m_lenm_hdr.mh_len = sizeof(struct ip6_frag); | |||
| 1017 | *frghdrp = mtod(mfrg, struct ip6_frag *)((struct ip6_frag *)((mfrg)->m_hdr.mh_data)); | |||
| 1018 | mlast->m_nextm_hdr.mh_next = mfrg; | |||
| 1019 | } | |||
| 1020 | ||||
| 1021 | return (0); | |||
| 1022 | } | |||
| 1023 | ||||
| 1024 | int | |||
| 1025 | ip6_getpmtu(struct rtentry *rt, struct ifnet *ifp, u_long *mtup) | |||
| 1026 | { | |||
| 1027 | u_int32_t mtu = 0; | |||
| 1028 | int error = 0; | |||
| 1029 | ||||
| 1030 | if (rt != NULL((void *)0)) { | |||
| 1031 | mtu = rt->rt_mturt_rmx.rmx_mtu; | |||
| 1032 | if (mtu == 0) | |||
| 1033 | mtu = ifp->if_mtuif_data.ifi_mtu; | |||
| 1034 | else if (mtu < IPV6_MMTU1280) { | |||
| 1035 | /* RFC8021 IPv6 Atomic Fragments Considered Harmful */ | |||
| 1036 | mtu = IPV6_MMTU1280; | |||
| 1037 | } else if (mtu > ifp->if_mtuif_data.ifi_mtu) { | |||
| 1038 | /* | |||
| 1039 | * The MTU on the route is larger than the MTU on | |||
| 1040 | * the interface! This shouldn't happen, unless the | |||
| 1041 | * MTU of the interface has been changed after the | |||
| 1042 | * interface was brought up. Change the MTU in the | |||
| 1043 | * route to match the interface MTU (as long as the | |||
| 1044 | * field isn't locked). | |||
| 1045 | */ | |||
| 1046 | mtu = ifp->if_mtuif_data.ifi_mtu; | |||
| 1047 | if (!(rt->rt_locksrt_rmx.rmx_locks & RTV_MTU0x1)) | |||
| 1048 | rt->rt_mturt_rmx.rmx_mtu = mtu; | |||
| 1049 | } | |||
| 1050 | } else { | |||
| 1051 | mtu = ifp->if_mtuif_data.ifi_mtu; | |||
| 1052 | } | |||
| 1053 | ||||
| 1054 | *mtup = mtu; | |||
| 1055 | return (error); | |||
| 1056 | } | |||
| 1057 | ||||
| 1058 | /* | |||
| 1059 | * IP6 socket option processing. | |||
| 1060 | */ | |||
| 1061 | int | |||
| 1062 | ip6_ctloutput(int op, struct socket *so, int level, int optname, | |||
| 1063 | struct mbuf *m) | |||
| 1064 | { | |||
| 1065 | int privileged, optdatalen, uproto; | |||
| 1066 | void *optdata; | |||
| 1067 | struct inpcb *inp = sotoinpcb(so)((struct inpcb *)(so)->so_pcb); | |||
| 1068 | int error, optval; | |||
| 1069 | struct proc *p = curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc; /* For IPsec and rdomain */ | |||
| 1070 | u_int rtableid, rtid = 0; | |||
| 1071 | ||||
| 1072 | error = optval = 0; | |||
| 1073 | ||||
| 1074 | privileged = (inp->inp_socket->so_state & SS_PRIV0x080); | |||
| 1075 | uproto = (int)so->so_proto->pr_protocol; | |||
| 1076 | ||||
| 1077 | if (level != IPPROTO_IPV641) | |||
| 1078 | return (EINVAL22); | |||
| 1079 | ||||
| 1080 | rtableid = p->p_p->ps_rtableid; | |||
| 1081 | ||||
| 1082 | switch (op) { | |||
| 1083 | case PRCO_SETOPT1: | |||
| 1084 | switch (optname) { | |||
| 1085 | /* | |||
| 1086 | * Use of some Hop-by-Hop options or some | |||
| 1087 | * Destination options, might require special | |||
| 1088 | * privilege. That is, normal applications | |||
| 1089 | * (without special privilege) might be forbidden | |||
| 1090 | * from setting certain options in outgoing packets, | |||
| 1091 | * and might never see certain options in received | |||
| 1092 | * packets. [RFC 2292 Section 6] | |||
| 1093 | * KAME specific note: | |||
| 1094 | * KAME prevents non-privileged users from sending or | |||
| 1095 | * receiving ANY hbh/dst options in order to avoid | |||
| 1096 | * overhead of parsing options in the kernel. | |||
| 1097 | */ | |||
| 1098 | case IPV6_RECVHOPOPTS39: | |||
| 1099 | case IPV6_RECVDSTOPTS40: | |||
| 1100 | if (!privileged) { | |||
| 1101 | error = EPERM1; | |||
| 1102 | break; | |||
| 1103 | } | |||
| 1104 | /* FALLTHROUGH */ | |||
| 1105 | case IPV6_UNICAST_HOPS4: | |||
| 1106 | case IPV6_MINHOPCOUNT65: | |||
| 1107 | case IPV6_HOPLIMIT47: | |||
| 1108 | ||||
| 1109 | case IPV6_RECVPKTINFO36: | |||
| 1110 | case IPV6_RECVHOPLIMIT37: | |||
| 1111 | case IPV6_RECVRTHDR38: | |||
| 1112 | case IPV6_RECVPATHMTU43: | |||
| 1113 | case IPV6_RECVTCLASS57: | |||
| 1114 | case IPV6_V6ONLY27: | |||
| 1115 | case IPV6_AUTOFLOWLABEL59: | |||
| 1116 | case IPV6_RECVDSTPORT64: | |||
| 1117 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(int)) { | |||
| 1118 | error = EINVAL22; | |||
| 1119 | break; | |||
| 1120 | } | |||
| 1121 | optval = *mtod(m, int *)((int *)((m)->m_hdr.mh_data)); | |||
| 1122 | switch (optname) { | |||
| 1123 | ||||
| 1124 | case IPV6_UNICAST_HOPS4: | |||
| 1125 | if (optval < -1 || optval >= 256) | |||
| 1126 | error = EINVAL22; | |||
| 1127 | else { | |||
| 1128 | /* -1 = kernel default */ | |||
| 1129 | inp->inp_hops = optval; | |||
| 1130 | } | |||
| 1131 | break; | |||
| 1132 | ||||
| 1133 | case IPV6_MINHOPCOUNT65: | |||
| 1134 | if (optval < 0 || optval > 255) | |||
| 1135 | error = EINVAL22; | |||
| 1136 | else | |||
| 1137 | inp->inp_ip6_minhliminp_ip_minttl = optval; | |||
| 1138 | break; | |||
| 1139 | ||||
| 1140 | #define OPTSET(bit) \ | |||
| 1141 | do { \ | |||
| 1142 | if (optval) \ | |||
| 1143 | inp->inp_flags |= (bit); \ | |||
| 1144 | else \ | |||
| 1145 | inp->inp_flags &= ~(bit); \ | |||
| 1146 | } while (/*CONSTCOND*/ 0) | |||
| 1147 | #define OPTBIT(bit)(inp->inp_flags & (bit) ? 1 : 0) (inp->inp_flags & (bit) ? 1 : 0) | |||
| 1148 | ||||
| 1149 | case IPV6_RECVPKTINFO36: | |||
| 1150 | OPTSET(IN6P_PKTINFO0x010000); | |||
| 1151 | break; | |||
| 1152 | ||||
| 1153 | case IPV6_HOPLIMIT47: | |||
| 1154 | { | |||
| 1155 | struct ip6_pktopts **optp; | |||
| 1156 | ||||
| 1157 | optp = &inp->inp_outputopts6; | |||
| 1158 | error = ip6_pcbopt(IPV6_HOPLIMIT47, | |||
| 1159 | (u_char *)&optval, sizeof(optval), optp, | |||
| 1160 | privileged, uproto); | |||
| 1161 | break; | |||
| 1162 | } | |||
| 1163 | ||||
| 1164 | case IPV6_RECVHOPLIMIT37: | |||
| 1165 | OPTSET(IN6P_HOPLIMIT0x020000); | |||
| 1166 | break; | |||
| 1167 | ||||
| 1168 | case IPV6_RECVHOPOPTS39: | |||
| 1169 | OPTSET(IN6P_HOPOPTS0x040000); | |||
| 1170 | break; | |||
| 1171 | ||||
| 1172 | case IPV6_RECVDSTOPTS40: | |||
| 1173 | OPTSET(IN6P_DSTOPTS0x080000); | |||
| 1174 | break; | |||
| 1175 | ||||
| 1176 | case IPV6_RECVRTHDR38: | |||
| 1177 | OPTSET(IN6P_RTHDR0x100000); | |||
| 1178 | break; | |||
| 1179 | ||||
| 1180 | case IPV6_RECVPATHMTU43: | |||
| 1181 | /* | |||
| 1182 | * We ignore this option for TCP | |||
| 1183 | * sockets. | |||
| 1184 | * (RFC3542 leaves this case | |||
| 1185 | * unspecified.) | |||
| 1186 | */ | |||
| 1187 | if (uproto != IPPROTO_TCP6) | |||
| 1188 | OPTSET(IN6P_MTU0x80000000); | |||
| 1189 | break; | |||
| 1190 | ||||
| 1191 | case IPV6_V6ONLY27: | |||
| 1192 | /* | |||
| 1193 | * make setsockopt(IPV6_V6ONLY) | |||
| 1194 | * available only prior to bind(2). | |||
| 1195 | * see ipng mailing list, Jun 22 2001. | |||
| 1196 | */ | |||
| 1197 | if (inp->inp_lport || !IN6_IS_ADDR_UNSPECIFIED(((*(const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[0]) == 0) && (*( const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[4]) == 0) && (*( const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[8]) == 0) && (*( const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[12]) == 0)) | |||
| 1198 | &inp->inp_laddr6)((*(const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[0]) == 0) && (*( const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[4]) == 0) && (*( const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[8]) == 0) && (*( const u_int32_t *)(const void *)(&(&inp->inp_laddru .iau_addr6)->__u6_addr.__u6_addr8[12]) == 0))) { | |||
| 1199 | error = EINVAL22; | |||
| 1200 | break; | |||
| 1201 | } | |||
| 1202 | /* No support for IPv4-mapped addresses. */ | |||
| 1203 | if (!optval) | |||
| 1204 | error = EINVAL22; | |||
| 1205 | else | |||
| 1206 | error = 0; | |||
| 1207 | break; | |||
| 1208 | case IPV6_RECVTCLASS57: | |||
| 1209 | OPTSET(IN6P_TCLASS0x400000); | |||
| 1210 | break; | |||
| 1211 | case IPV6_AUTOFLOWLABEL59: | |||
| 1212 | OPTSET(IN6P_AUTOFLOWLABEL0x800000); | |||
| 1213 | break; | |||
| 1214 | ||||
| 1215 | case IPV6_RECVDSTPORT64: | |||
| 1216 | OPTSET(IN6P_RECVDSTPORT0x200); | |||
| 1217 | break; | |||
| 1218 | } | |||
| 1219 | break; | |||
| 1220 | ||||
| 1221 | case IPV6_TCLASS61: | |||
| 1222 | case IPV6_DONTFRAG62: | |||
| 1223 | case IPV6_USE_MIN_MTU42: | |||
| 1224 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(optval)) { | |||
| 1225 | error = EINVAL22; | |||
| 1226 | break; | |||
| 1227 | } | |||
| 1228 | optval = *mtod(m, int *)((int *)((m)->m_hdr.mh_data)); | |||
| 1229 | { | |||
| 1230 | struct ip6_pktopts **optp; | |||
| 1231 | optp = &inp->inp_outputopts6; | |||
| 1232 | error = ip6_pcbopt(optname, (u_char *)&optval, | |||
| 1233 | sizeof(optval), optp, privileged, uproto); | |||
| 1234 | break; | |||
| 1235 | } | |||
| 1236 | ||||
| 1237 | case IPV6_PKTINFO46: | |||
| 1238 | case IPV6_HOPOPTS49: | |||
| 1239 | case IPV6_RTHDR51: | |||
| 1240 | case IPV6_DSTOPTS50: | |||
| 1241 | case IPV6_RTHDRDSTOPTS35: | |||
| 1242 | { | |||
| 1243 | /* new advanced API (RFC3542) */ | |||
| 1244 | u_char *optbuf; | |||
| 1245 | int optbuflen; | |||
| 1246 | struct ip6_pktopts **optp; | |||
| 1247 | ||||
| 1248 | if (m && m->m_nextm_hdr.mh_next) { | |||
| 1249 | error = EINVAL22; /* XXX */ | |||
| 1250 | break; | |||
| 1251 | } | |||
| 1252 | if (m) { | |||
| 1253 | optbuf = mtod(m, u_char *)((u_char *)((m)->m_hdr.mh_data)); | |||
| 1254 | optbuflen = m->m_lenm_hdr.mh_len; | |||
| 1255 | } else { | |||
| 1256 | optbuf = NULL((void *)0); | |||
| 1257 | optbuflen = 0; | |||
| 1258 | } | |||
| 1259 | optp = &inp->inp_outputopts6; | |||
| 1260 | error = ip6_pcbopt(optname, optbuf, optbuflen, optp, | |||
| 1261 | privileged, uproto); | |||
| 1262 | break; | |||
| 1263 | } | |||
| 1264 | #undef OPTSET | |||
| 1265 | ||||
| 1266 | case IPV6_MULTICAST_IF9: | |||
| 1267 | case IPV6_MULTICAST_HOPS10: | |||
| 1268 | case IPV6_MULTICAST_LOOP11: | |||
| 1269 | case IPV6_JOIN_GROUP12: | |||
| 1270 | case IPV6_LEAVE_GROUP13: | |||
| 1271 | error = ip6_setmoptions(optname, | |||
| 1272 | &inp->inp_moptions6inp_mou.mou_mo6, | |||
| 1273 | m, inp->inp_rtableid); | |||
| 1274 | break; | |||
| 1275 | ||||
| 1276 | case IPV6_PORTRANGE14: | |||
| 1277 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(int)) { | |||
| 1278 | error = EINVAL22; | |||
| 1279 | break; | |||
| 1280 | } | |||
| 1281 | optval = *mtod(m, int *)((int *)((m)->m_hdr.mh_data)); | |||
| 1282 | ||||
| 1283 | switch (optval) { | |||
| 1284 | case IPV6_PORTRANGE_DEFAULT0: | |||
| 1285 | inp->inp_flags &= ~(IN6P_LOWPORT0x020); | |||
| 1286 | inp->inp_flags &= ~(IN6P_HIGHPORT0x010); | |||
| 1287 | break; | |||
| 1288 | ||||
| 1289 | case IPV6_PORTRANGE_HIGH1: | |||
| 1290 | inp->inp_flags &= ~(IN6P_LOWPORT0x020); | |||
| 1291 | inp->inp_flags |= IN6P_HIGHPORT0x010; | |||
| 1292 | break; | |||
| 1293 | ||||
| 1294 | case IPV6_PORTRANGE_LOW2: | |||
| 1295 | inp->inp_flags &= ~(IN6P_HIGHPORT0x010); | |||
| 1296 | inp->inp_flags |= IN6P_LOWPORT0x020; | |||
| 1297 | break; | |||
| 1298 | ||||
| 1299 | default: | |||
| 1300 | error = EINVAL22; | |||
| 1301 | break; | |||
| 1302 | } | |||
| 1303 | break; | |||
| 1304 | ||||
| 1305 | case IPSEC6_OUTSA56: | |||
| 1306 | error = EINVAL22; | |||
| 1307 | break; | |||
| 1308 | ||||
| 1309 | case IPV6_AUTH_LEVEL53: | |||
| 1310 | case IPV6_ESP_TRANS_LEVEL54: | |||
| 1311 | case IPV6_ESP_NETWORK_LEVEL55: | |||
| 1312 | case IPV6_IPCOMP_LEVEL60: | |||
| 1313 | #ifndef IPSEC1 | |||
| 1314 | error = EINVAL22; | |||
| 1315 | #else | |||
| 1316 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(int)) { | |||
| 1317 | error = EINVAL22; | |||
| 1318 | break; | |||
| 1319 | } | |||
| 1320 | optval = *mtod(m, int *)((int *)((m)->m_hdr.mh_data)); | |||
| 1321 | ||||
| 1322 | if (optval < IPSEC_LEVEL_BYPASS0x00 || | |||
| 1323 | optval > IPSEC_LEVEL_UNIQUE0x04) { | |||
| 1324 | error = EINVAL22; | |||
| 1325 | break; | |||
| 1326 | } | |||
| 1327 | ||||
| 1328 | switch (optname) { | |||
| 1329 | case IPV6_AUTH_LEVEL53: | |||
| 1330 | if (optval < IPSEC_AUTH_LEVEL_DEFAULT0x01 && | |||
| 1331 | suser(p)) { | |||
| 1332 | error = EACCES13; | |||
| 1333 | break; | |||
| 1334 | } | |||
| 1335 | inp->inp_seclevel[SL_AUTH0] = optval; | |||
| 1336 | break; | |||
| 1337 | ||||
| 1338 | case IPV6_ESP_TRANS_LEVEL54: | |||
| 1339 | if (optval < IPSEC_ESP_TRANS_LEVEL_DEFAULT0x01 && | |||
| 1340 | suser(p)) { | |||
| 1341 | error = EACCES13; | |||
| 1342 | break; | |||
| 1343 | } | |||
| 1344 | inp->inp_seclevel[SL_ESP_TRANS1] = optval; | |||
| 1345 | break; | |||
| 1346 | ||||
| 1347 | case IPV6_ESP_NETWORK_LEVEL55: | |||
| 1348 | if (optval < IPSEC_ESP_NETWORK_LEVEL_DEFAULT0x01 && | |||
| 1349 | suser(p)) { | |||
| 1350 | error = EACCES13; | |||
| 1351 | break; | |||
| 1352 | } | |||
| 1353 | inp->inp_seclevel[SL_ESP_NETWORK2] = optval; | |||
| 1354 | break; | |||
| 1355 | ||||
| 1356 | case IPV6_IPCOMP_LEVEL60: | |||
| 1357 | if (optval < IPSEC_IPCOMP_LEVEL_DEFAULT0x01 && | |||
| 1358 | suser(p)) { | |||
| 1359 | error = EACCES13; | |||
| 1360 | break; | |||
| 1361 | } | |||
| 1362 | inp->inp_seclevel[SL_IPCOMP3] = optval; | |||
| 1363 | break; | |||
| 1364 | } | |||
| 1365 | #endif | |||
| 1366 | break; | |||
| 1367 | case SO_RTABLE0x1021: | |||
| 1368 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len < sizeof(u_int)) { | |||
| 1369 | error = EINVAL22; | |||
| 1370 | break; | |||
| 1371 | } | |||
| 1372 | rtid = *mtod(m, u_int *)((u_int *)((m)->m_hdr.mh_data)); | |||
| 1373 | if (inp->inp_rtableid == rtid) | |||
| 1374 | break; | |||
| 1375 | /* needs privileges to switch when already set */ | |||
| 1376 | if (rtableid != rtid && rtableid != 0 && | |||
| 1377 | (error = suser(p)) != 0) | |||
| 1378 | break; | |||
| 1379 | /* table must exist */ | |||
| 1380 | if (!rtable_exists(rtid)) { | |||
| 1381 | error = EINVAL22; | |||
| 1382 | break; | |||
| 1383 | } | |||
| 1384 | error = in_pcbset_rtableid(inp, rtid); | |||
| 1385 | break; | |||
| 1386 | case IPV6_PIPEX63: | |||
| 1387 | if (m != NULL((void *)0) && m->m_lenm_hdr.mh_len == sizeof(int)) | |||
| 1388 | inp->inp_pipex = *mtod(m, int *)((int *)((m)->m_hdr.mh_data)); | |||
| 1389 | else | |||
| 1390 | error = EINVAL22; | |||
| 1391 | break; | |||
| 1392 | ||||
| 1393 | default: | |||
| 1394 | error = ENOPROTOOPT42; | |||
| 1395 | break; | |||
| 1396 | } | |||
| 1397 | break; | |||
| 1398 | ||||
| 1399 | case PRCO_GETOPT0: | |||
| 1400 | switch (optname) { | |||
| 1401 | ||||
| 1402 | case IPV6_RECVHOPOPTS39: | |||
| 1403 | case IPV6_RECVDSTOPTS40: | |||
| 1404 | case IPV6_UNICAST_HOPS4: | |||
| 1405 | case IPV6_MINHOPCOUNT65: | |||
| 1406 | case IPV6_RECVPKTINFO36: | |||
| 1407 | case IPV6_RECVHOPLIMIT37: | |||
| 1408 | case IPV6_RECVRTHDR38: | |||
| 1409 | case IPV6_RECVPATHMTU43: | |||
| 1410 | ||||
| 1411 | case IPV6_V6ONLY27: | |||
| 1412 | case IPV6_PORTRANGE14: | |||
| 1413 | case IPV6_RECVTCLASS57: | |||
| 1414 | case IPV6_AUTOFLOWLABEL59: | |||
| 1415 | case IPV6_RECVDSTPORT64: | |||
| 1416 | switch (optname) { | |||
| 1417 | ||||
| 1418 | case IPV6_RECVHOPOPTS39: | |||
| 1419 | optval = OPTBIT(IN6P_HOPOPTS)(inp->inp_flags & (0x040000) ? 1 : 0); | |||
| 1420 | break; | |||
| 1421 | ||||
| 1422 | case IPV6_RECVDSTOPTS40: | |||
| 1423 | optval = OPTBIT(IN6P_DSTOPTS)(inp->inp_flags & (0x080000) ? 1 : 0); | |||
| 1424 | break; | |||
| 1425 | ||||
| 1426 | case IPV6_UNICAST_HOPS4: | |||
| 1427 | optval = inp->inp_hops; | |||
| 1428 | break; | |||
| 1429 | ||||
| 1430 | case IPV6_MINHOPCOUNT65: | |||
| 1431 | optval = inp->inp_ip6_minhliminp_ip_minttl; | |||
| 1432 | break; | |||
| 1433 | ||||
| 1434 | case IPV6_RECVPKTINFO36: | |||
| 1435 | optval = OPTBIT(IN6P_PKTINFO)(inp->inp_flags & (0x010000) ? 1 : 0); | |||
| 1436 | break; | |||
| 1437 | ||||
| 1438 | case IPV6_RECVHOPLIMIT37: | |||
| 1439 | optval = OPTBIT(IN6P_HOPLIMIT)(inp->inp_flags & (0x020000) ? 1 : 0); | |||
| 1440 | break; | |||
| 1441 | ||||
| 1442 | case IPV6_RECVRTHDR38: | |||
| 1443 | optval = OPTBIT(IN6P_RTHDR)(inp->inp_flags & (0x100000) ? 1 : 0); | |||
| 1444 | break; | |||
| 1445 | ||||
| 1446 | case IPV6_RECVPATHMTU43: | |||
| 1447 | optval = OPTBIT(IN6P_MTU)(inp->inp_flags & (0x80000000) ? 1 : 0); | |||
| 1448 | break; | |||
| 1449 | ||||
| 1450 | case IPV6_V6ONLY27: | |||
| 1451 | optval = 1; | |||
| 1452 | break; | |||
| 1453 | ||||
| 1454 | case IPV6_PORTRANGE14: | |||
| 1455 | { | |||
| 1456 | int flags; | |||
| 1457 | flags = inp->inp_flags; | |||
| 1458 | if (flags & IN6P_HIGHPORT0x010) | |||
| 1459 | optval = IPV6_PORTRANGE_HIGH1; | |||
| 1460 | else if (flags & IN6P_LOWPORT0x020) | |||
| 1461 | optval = IPV6_PORTRANGE_LOW2; | |||
| 1462 | else | |||
| 1463 | optval = 0; | |||
| 1464 | break; | |||
| 1465 | } | |||
| 1466 | case IPV6_RECVTCLASS57: | |||
| 1467 | optval = OPTBIT(IN6P_TCLASS)(inp->inp_flags & (0x400000) ? 1 : 0); | |||
| 1468 | break; | |||
| 1469 | ||||
| 1470 | case IPV6_AUTOFLOWLABEL59: | |||
| 1471 | optval = OPTBIT(IN6P_AUTOFLOWLABEL)(inp->inp_flags & (0x800000) ? 1 : 0); | |||
| 1472 | break; | |||
| 1473 | ||||
| 1474 | case IPV6_RECVDSTPORT64: | |||
| 1475 | optval = OPTBIT(IN6P_RECVDSTPORT)(inp->inp_flags & (0x200) ? 1 : 0); | |||
| 1476 | break; | |||
| 1477 | } | |||
| 1478 | if (error) | |||
| 1479 | break; | |||
| 1480 | m->m_lenm_hdr.mh_len = sizeof(int); | |||
| 1481 | *mtod(m, int *)((int *)((m)->m_hdr.mh_data)) = optval; | |||
| 1482 | break; | |||
| 1483 | ||||
| 1484 | case IPV6_PATHMTU44: | |||
| 1485 | { | |||
| 1486 | u_long pmtu = 0; | |||
| 1487 | struct ip6_mtuinfo mtuinfo; | |||
| 1488 | struct ifnet *ifp; | |||
| 1489 | struct rtentry *rt; | |||
| 1490 | ||||
| 1491 | if (!(so->so_state & SS_ISCONNECTED0x002)) | |||
| 1492 | return (ENOTCONN57); | |||
| 1493 | ||||
| 1494 | rt = in_pcbrtentry(inp); | |||
| 1495 | if (!rtisvalid(rt)) | |||
| 1496 | return (EHOSTUNREACH65); | |||
| 1497 | ||||
| 1498 | ifp = if_get(rt->rt_ifidx); | |||
| 1499 | if (ifp == NULL((void *)0)) | |||
| 1500 | return (EHOSTUNREACH65); | |||
| 1501 | /* | |||
| 1502 | * XXX: we dot not consider the case of source | |||
| 1503 | * routing, or optional information to specify | |||
| 1504 | * the outgoing interface. | |||
| 1505 | */ | |||
| 1506 | error = ip6_getpmtu(rt, ifp, &pmtu); | |||
| 1507 | if_put(ifp); | |||
| 1508 | if (error) | |||
| 1509 | break; | |||
| 1510 | if (pmtu > IPV6_MAXPACKET65535) | |||
| 1511 | pmtu = IPV6_MAXPACKET65535; | |||
| 1512 | ||||
| 1513 | bzero(&mtuinfo, sizeof(mtuinfo))__builtin_bzero((&mtuinfo), (sizeof(mtuinfo))); | |||
| 1514 | mtuinfo.ip6m_mtu = (u_int32_t)pmtu; | |||
| 1515 | optdata = (void *)&mtuinfo; | |||
| 1516 | optdatalen = sizeof(mtuinfo); | |||
| 1517 | if (optdatalen > MCLBYTES(1 << 11)) | |||
| 1518 | return (EMSGSIZE40); /* XXX */ | |||
| 1519 | if (optdatalen > MLEN(256 - sizeof(struct m_hdr))) | |||
| 1520 | MCLGET(m, M_WAIT)(void) m_clget((m), (0x0001), (1 << 11)); | |||
| 1521 | m->m_lenm_hdr.mh_len = optdatalen; | |||
| 1522 | bcopy(optdata, mtod(m, void *)((void *)((m)->m_hdr.mh_data)), optdatalen); | |||
| 1523 | break; | |||
| 1524 | } | |||
| 1525 | ||||
| 1526 | case IPV6_PKTINFO46: | |||
| 1527 | case IPV6_HOPOPTS49: | |||
| 1528 | case IPV6_RTHDR51: | |||
| 1529 | case IPV6_DSTOPTS50: | |||
| 1530 | case IPV6_RTHDRDSTOPTS35: | |||
| 1531 | case IPV6_TCLASS61: | |||
| 1532 | case IPV6_DONTFRAG62: | |||
| 1533 | case IPV6_USE_MIN_MTU42: | |||
| 1534 | error = ip6_getpcbopt(inp->inp_outputopts6, | |||
| 1535 | optname, m); | |||
| 1536 | break; | |||
| 1537 | ||||
| 1538 | case IPV6_MULTICAST_IF9: | |||
| 1539 | case IPV6_MULTICAST_HOPS10: | |||
| 1540 | case IPV6_MULTICAST_LOOP11: | |||
| 1541 | case IPV6_JOIN_GROUP12: | |||
| 1542 | case IPV6_LEAVE_GROUP13: | |||
| 1543 | error = ip6_getmoptions(optname, | |||
| 1544 | inp->inp_moptions6inp_mou.mou_mo6, m); | |||
| 1545 | break; | |||
| 1546 | ||||
| 1547 | case IPSEC6_OUTSA56: | |||
| 1548 | error = EINVAL22; | |||
| 1549 | break; | |||
| 1550 | ||||
| 1551 | case IPV6_AUTH_LEVEL53: | |||
| 1552 | case IPV6_ESP_TRANS_LEVEL54: | |||
| 1553 | case IPV6_ESP_NETWORK_LEVEL55: | |||
| 1554 | case IPV6_IPCOMP_LEVEL60: | |||
| 1555 | #ifndef IPSEC1 | |||
| 1556 | m->m_lenm_hdr.mh_len = sizeof(int); | |||
| 1557 | *mtod(m, int *)((int *)((m)->m_hdr.mh_data)) = IPSEC_LEVEL_NONE0x00; | |||
| 1558 | #else | |||
| 1559 | m->m_lenm_hdr.mh_len = sizeof(int); | |||
| 1560 | switch (optname) { | |||
| 1561 | case IPV6_AUTH_LEVEL53: | |||
| 1562 | optval = inp->inp_seclevel[SL_AUTH0]; | |||
| 1563 | break; | |||
| 1564 | ||||
| 1565 | case IPV6_ESP_TRANS_LEVEL54: | |||
| 1566 | optval = | |||
| 1567 | inp->inp_seclevel[SL_ESP_TRANS1]; | |||
| 1568 | break; | |||
| 1569 | ||||
| 1570 | case IPV6_ESP_NETWORK_LEVEL55: | |||
| 1571 | optval = | |||
| 1572 | inp->inp_seclevel[SL_ESP_NETWORK2]; | |||
| 1573 | break; | |||
| 1574 | ||||
| 1575 | case IPV6_IPCOMP_LEVEL60: | |||
| 1576 | optval = inp->inp_seclevel[SL_IPCOMP3]; | |||
| 1577 | break; | |||
| 1578 | } | |||
| 1579 | *mtod(m, int *)((int *)((m)->m_hdr.mh_data)) = optval; | |||
| 1580 | #endif | |||
| 1581 | break; | |||
| 1582 | case SO_RTABLE0x1021: | |||
| 1583 | m->m_lenm_hdr.mh_len = sizeof(u_int); | |||
| 1584 | *mtod(m, u_int *)((u_int *)((m)->m_hdr.mh_data)) = inp->inp_rtableid; | |||
| 1585 | break; | |||
| 1586 | case IPV6_PIPEX63: | |||
| 1587 | m->m_lenm_hdr.mh_len = sizeof(int); | |||
| 1588 | *mtod(m, int *)((int *)((m)->m_hdr.mh_data)) = inp->inp_pipex; | |||
| 1589 | break; | |||
| 1590 | ||||
| 1591 | default: | |||
| 1592 | error = ENOPROTOOPT42; | |||
| 1593 | break; | |||
| 1594 | } | |||
| 1595 | break; | |||
| 1596 | } | |||
| 1597 | return (error); | |||
| 1598 | } | |||
| 1599 | ||||
| 1600 | int | |||
| 1601 | ip6_raw_ctloutput(int op, struct socket *so, int level, int optname, | |||
| 1602 | struct mbuf *m) | |||
| 1603 | { | |||
| 1604 | int error = 0, optval; | |||
| 1605 | const int icmp6off = offsetof(struct icmp6_hdr, icmp6_cksum)__builtin_offsetof(struct icmp6_hdr, icmp6_cksum); | |||
| 1606 | struct inpcb *inp = sotoinpcb(so)((struct inpcb *)(so)->so_pcb); | |||
| 1607 | ||||
| 1608 | if (level != IPPROTO_IPV641) | |||
| 1609 | return (EINVAL22); | |||
| 1610 | ||||
| 1611 | switch (optname) { | |||
| 1612 | case IPV6_CHECKSUM26: | |||
| 1613 | /* | |||
| 1614 | * For ICMPv6 sockets, no modification allowed for checksum | |||
| 1615 | * offset, permit "no change" values to help existing apps. | |||
| 1616 | * | |||
| 1617 | * RFC3542 says: "An attempt to set IPV6_CHECKSUM | |||
| 1618 | * for an ICMPv6 socket will fail." | |||
| 1619 | * The current behavior does not meet RFC3542. | |||
| 1620 | */ | |||
| 1621 | switch (op) { | |||
| 1622 | case PRCO_SETOPT1: | |||
| 1623 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(int)) { | |||
| 1624 | error = EINVAL22; | |||
| 1625 | break; | |||
| 1626 | } | |||
| 1627 | optval = *mtod(m, int *)((int *)((m)->m_hdr.mh_data)); | |||
| 1628 | if (optval < -1 || | |||
| 1629 | (optval > 0 && (optval % 2) != 0)) { | |||
| 1630 | /* | |||
| 1631 | * The API assumes non-negative even offset | |||
| 1632 | * values or -1 as a special value. | |||
| 1633 | */ | |||
| 1634 | error = EINVAL22; | |||
| 1635 | } else if (so->so_proto->pr_protocol == | |||
| 1636 | IPPROTO_ICMPV658) { | |||
| 1637 | if (optval != icmp6off) | |||
| 1638 | error = EINVAL22; | |||
| 1639 | } else | |||
| 1640 | inp->inp_cksum6 = optval; | |||
| 1641 | break; | |||
| 1642 | ||||
| 1643 | case PRCO_GETOPT0: | |||
| 1644 | if (so->so_proto->pr_protocol == IPPROTO_ICMPV658) | |||
| 1645 | optval = icmp6off; | |||
| 1646 | else | |||
| 1647 | optval = inp->inp_cksum6; | |||
| 1648 | ||||
| 1649 | m->m_lenm_hdr.mh_len = sizeof(int); | |||
| 1650 | *mtod(m, int *)((int *)((m)->m_hdr.mh_data)) = optval; | |||
| 1651 | break; | |||
| 1652 | ||||
| 1653 | default: | |||
| 1654 | error = EINVAL22; | |||
| 1655 | break; | |||
| 1656 | } | |||
| 1657 | break; | |||
| 1658 | ||||
| 1659 | default: | |||
| 1660 | error = ENOPROTOOPT42; | |||
| 1661 | break; | |||
| 1662 | } | |||
| 1663 | ||||
| 1664 | return (error); | |||
| 1665 | } | |||
| 1666 | ||||
| 1667 | /* | |||
| 1668 | * initialize ip6_pktopts. beware that there are non-zero default values in | |||
| 1669 | * the struct. | |||
| 1670 | */ | |||
| 1671 | void | |||
| 1672 | ip6_initpktopts(struct ip6_pktopts *opt) | |||
| 1673 | { | |||
| 1674 | bzero(opt, sizeof(*opt))__builtin_bzero((opt), (sizeof(*opt))); | |||
| 1675 | opt->ip6po_hlim = -1; /* -1 means default hop limit */ | |||
| 1676 | opt->ip6po_tclass = -1; /* -1 means default traffic class */ | |||
| 1677 | opt->ip6po_minmtu = IP6PO_MINMTU_MCASTONLY-1; | |||
| 1678 | } | |||
| 1679 | ||||
| 1680 | int | |||
| 1681 | ip6_pcbopt(int optname, u_char *buf, int len, struct ip6_pktopts **pktopt, | |||
| 1682 | int priv, int uproto) | |||
| 1683 | { | |||
| 1684 | struct ip6_pktopts *opt; | |||
| 1685 | ||||
| 1686 | if (*pktopt == NULL((void *)0)) { | |||
| 1687 | *pktopt = malloc(sizeof(struct ip6_pktopts), M_IP6OPT123, | |||
| 1688 | M_WAITOK0x0001); | |||
| 1689 | ip6_initpktopts(*pktopt); | |||
| 1690 | } | |||
| 1691 | opt = *pktopt; | |||
| 1692 | ||||
| 1693 | return (ip6_setpktopt(optname, buf, len, opt, priv, 1, uproto)); | |||
| 1694 | } | |||
| 1695 | ||||
| 1696 | int | |||
| 1697 | ip6_getpcbopt(struct ip6_pktopts *pktopt, int optname, struct mbuf *m) | |||
| 1698 | { | |||
| 1699 | void *optdata = NULL((void *)0); | |||
| 1700 | int optdatalen = 0; | |||
| 1701 | struct ip6_ext *ip6e; | |||
| 1702 | int error = 0; | |||
| 1703 | struct in6_pktinfo null_pktinfo; | |||
| 1704 | int deftclass = 0, on; | |||
| 1705 | int defminmtu = IP6PO_MINMTU_MCASTONLY-1; | |||
| 1706 | ||||
| 1707 | switch (optname) { | |||
| 1708 | case IPV6_PKTINFO46: | |||
| 1709 | if (pktopt && pktopt->ip6po_pktinfo) | |||
| 1710 | optdata = (void *)pktopt->ip6po_pktinfo; | |||
| 1711 | else { | |||
| 1712 | /* XXX: we don't have to do this every time... */ | |||
| 1713 | bzero(&null_pktinfo, sizeof(null_pktinfo))__builtin_bzero((&null_pktinfo), (sizeof(null_pktinfo))); | |||
| 1714 | optdata = (void *)&null_pktinfo; | |||
| 1715 | } | |||
| 1716 | optdatalen = sizeof(struct in6_pktinfo); | |||
| 1717 | break; | |||
| 1718 | case IPV6_TCLASS61: | |||
| 1719 | if (pktopt && pktopt->ip6po_tclass >= 0) | |||
| 1720 | optdata = (void *)&pktopt->ip6po_tclass; | |||
| 1721 | else | |||
| 1722 | optdata = (void *)&deftclass; | |||
| 1723 | optdatalen = sizeof(int); | |||
| 1724 | break; | |||
| 1725 | case IPV6_HOPOPTS49: | |||
| 1726 | if (pktopt && pktopt->ip6po_hbh) { | |||
| 1727 | optdata = (void *)pktopt->ip6po_hbh; | |||
| 1728 | ip6e = (struct ip6_ext *)pktopt->ip6po_hbh; | |||
| 1729 | optdatalen = (ip6e->ip6e_len + 1) << 3; | |||
| 1730 | } | |||
| 1731 | break; | |||
| 1732 | case IPV6_RTHDR51: | |||
| 1733 | if (pktopt && pktopt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr) { | |||
| 1734 | optdata = (void *)pktopt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr; | |||
| 1735 | ip6e = (struct ip6_ext *)pktopt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr; | |||
| 1736 | optdatalen = (ip6e->ip6e_len + 1) << 3; | |||
| 1737 | } | |||
| 1738 | break; | |||
| 1739 | case IPV6_RTHDRDSTOPTS35: | |||
| 1740 | if (pktopt && pktopt->ip6po_dest1) { | |||
| 1741 | optdata = (void *)pktopt->ip6po_dest1; | |||
| 1742 | ip6e = (struct ip6_ext *)pktopt->ip6po_dest1; | |||
| 1743 | optdatalen = (ip6e->ip6e_len + 1) << 3; | |||
| 1744 | } | |||
| 1745 | break; | |||
| 1746 | case IPV6_DSTOPTS50: | |||
| 1747 | if (pktopt && pktopt->ip6po_dest2) { | |||
| 1748 | optdata = (void *)pktopt->ip6po_dest2; | |||
| 1749 | ip6e = (struct ip6_ext *)pktopt->ip6po_dest2; | |||
| 1750 | optdatalen = (ip6e->ip6e_len + 1) << 3; | |||
| 1751 | } | |||
| 1752 | break; | |||
| 1753 | case IPV6_USE_MIN_MTU42: | |||
| 1754 | if (pktopt) | |||
| 1755 | optdata = (void *)&pktopt->ip6po_minmtu; | |||
| 1756 | else | |||
| 1757 | optdata = (void *)&defminmtu; | |||
| 1758 | optdatalen = sizeof(int); | |||
| 1759 | break; | |||
| 1760 | case IPV6_DONTFRAG62: | |||
| 1761 | if (pktopt && ((pktopt->ip6po_flags) & IP6PO_DONTFRAG0x04)) | |||
| 1762 | on = 1; | |||
| 1763 | else | |||
| 1764 | on = 0; | |||
| 1765 | optdata = (void *)&on; | |||
| 1766 | optdatalen = sizeof(on); | |||
| 1767 | break; | |||
| 1768 | default: /* should not happen */ | |||
| 1769 | #ifdef DIAGNOSTIC1 | |||
| 1770 | panic("%s: unexpected option", __func__); | |||
| 1771 | #endif | |||
| 1772 | return (ENOPROTOOPT42); | |||
| 1773 | } | |||
| 1774 | ||||
| 1775 | if (optdatalen > MCLBYTES(1 << 11)) | |||
| 1776 | return (EMSGSIZE40); /* XXX */ | |||
| 1777 | if (optdatalen > MLEN(256 - sizeof(struct m_hdr))) | |||
| 1778 | MCLGET(m, M_WAIT)(void) m_clget((m), (0x0001), (1 << 11)); | |||
| 1779 | m->m_lenm_hdr.mh_len = optdatalen; | |||
| 1780 | if (optdatalen) | |||
| 1781 | bcopy(optdata, mtod(m, void *)((void *)((m)->m_hdr.mh_data)), optdatalen); | |||
| 1782 | ||||
| 1783 | return (error); | |||
| 1784 | } | |||
| 1785 | ||||
| 1786 | void | |||
| 1787 | ip6_clearpktopts(struct ip6_pktopts *pktopt, int optname) | |||
| 1788 | { | |||
| 1789 | if (optname == -1 || optname == IPV6_PKTINFO46) { | |||
| 1790 | if (pktopt->ip6po_pktinfo) | |||
| 1791 | free(pktopt->ip6po_pktinfo, M_IP6OPT123, 0); | |||
| 1792 | pktopt->ip6po_pktinfo = NULL((void *)0); | |||
| 1793 | } | |||
| 1794 | if (optname == -1 || optname == IPV6_HOPLIMIT47) | |||
| 1795 | pktopt->ip6po_hlim = -1; | |||
| 1796 | if (optname == -1 || optname == IPV6_TCLASS61) | |||
| 1797 | pktopt->ip6po_tclass = -1; | |||
| 1798 | if (optname == -1 || optname == IPV6_HOPOPTS49) { | |||
| 1799 | if (pktopt->ip6po_hbh) | |||
| 1800 | free(pktopt->ip6po_hbh, M_IP6OPT123, 0); | |||
| 1801 | pktopt->ip6po_hbh = NULL((void *)0); | |||
| 1802 | } | |||
| 1803 | if (optname == -1 || optname == IPV6_RTHDRDSTOPTS35) { | |||
| 1804 | if (pktopt->ip6po_dest1) | |||
| 1805 | free(pktopt->ip6po_dest1, M_IP6OPT123, 0); | |||
| 1806 | pktopt->ip6po_dest1 = NULL((void *)0); | |||
| 1807 | } | |||
| 1808 | if (optname == -1 || optname == IPV6_RTHDR51) { | |||
| 1809 | if (pktopt->ip6po_rhinfo.ip6po_rhi_rthdr) | |||
| 1810 | free(pktopt->ip6po_rhinfo.ip6po_rhi_rthdr, M_IP6OPT123, 0); | |||
| 1811 | pktopt->ip6po_rhinfo.ip6po_rhi_rthdr = NULL((void *)0); | |||
| 1812 | if (pktopt->ip6po_routeip6po_rhinfo.ip6po_rhi_route.ro_rt) { | |||
| 1813 | rtfree(pktopt->ip6po_routeip6po_rhinfo.ip6po_rhi_route.ro_rt); | |||
| 1814 | pktopt->ip6po_routeip6po_rhinfo.ip6po_rhi_route.ro_rt = NULL((void *)0); | |||
| 1815 | } | |||
| 1816 | } | |||
| 1817 | if (optname == -1 || optname == IPV6_DSTOPTS50) { | |||
| 1818 | if (pktopt->ip6po_dest2) | |||
| 1819 | free(pktopt->ip6po_dest2, M_IP6OPT123, 0); | |||
| 1820 | pktopt->ip6po_dest2 = NULL((void *)0); | |||
| 1821 | } | |||
| 1822 | } | |||
| 1823 | ||||
| 1824 | #define PKTOPT_EXTHDRCPY(type) \ | |||
| 1825 | do {\ | |||
| 1826 | if (src->type) {\ | |||
| 1827 | size_t hlen;\ | |||
| 1828 | hlen = (((struct ip6_ext *)src->type)->ip6e_len + 1) << 3;\ | |||
| 1829 | dst->type = malloc(hlen, M_IP6OPT123, M_NOWAIT0x0002);\ | |||
| 1830 | if (dst->type == NULL((void *)0))\ | |||
| 1831 | goto bad;\ | |||
| 1832 | memcpy(dst->type, src->type, hlen)__builtin_memcpy((dst->type), (src->type), (hlen));\ | |||
| 1833 | }\ | |||
| 1834 | } while (/*CONSTCOND*/ 0) | |||
| 1835 | ||||
| 1836 | int | |||
| 1837 | copypktopts(struct ip6_pktopts *dst, struct ip6_pktopts *src) | |||
| 1838 | { | |||
| 1839 | dst->ip6po_hlim = src->ip6po_hlim; | |||
| 1840 | dst->ip6po_tclass = src->ip6po_tclass; | |||
| 1841 | dst->ip6po_flags = src->ip6po_flags; | |||
| 1842 | if (src->ip6po_pktinfo) { | |||
| 1843 | dst->ip6po_pktinfo = malloc(sizeof(*dst->ip6po_pktinfo), | |||
| 1844 | M_IP6OPT123, M_NOWAIT0x0002); | |||
| 1845 | if (dst->ip6po_pktinfo == NULL((void *)0)) | |||
| 1846 | goto bad; | |||
| 1847 | *dst->ip6po_pktinfo = *src->ip6po_pktinfo; | |||
| 1848 | } | |||
| 1849 | PKTOPT_EXTHDRCPY(ip6po_hbh); | |||
| 1850 | PKTOPT_EXTHDRCPY(ip6po_dest1); | |||
| 1851 | PKTOPT_EXTHDRCPY(ip6po_dest2); | |||
| 1852 | PKTOPT_EXTHDRCPY(ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr); /* not copy the cached route */ | |||
| 1853 | return (0); | |||
| 1854 | ||||
| 1855 | bad: | |||
| 1856 | ip6_clearpktopts(dst, -1); | |||
| 1857 | return (ENOBUFS55); | |||
| 1858 | } | |||
| 1859 | #undef PKTOPT_EXTHDRCPY | |||
| 1860 | ||||
| 1861 | void | |||
| 1862 | ip6_freepcbopts(struct ip6_pktopts *pktopt) | |||
| 1863 | { | |||
| 1864 | if (pktopt == NULL((void *)0)) | |||
| 1865 | return; | |||
| 1866 | ||||
| 1867 | ip6_clearpktopts(pktopt, -1); | |||
| 1868 | ||||
| 1869 | free(pktopt, M_IP6OPT123, 0); | |||
| 1870 | } | |||
| 1871 | ||||
| 1872 | /* | |||
| 1873 | * Set the IP6 multicast options in response to user setsockopt(). | |||
| 1874 | */ | |||
| 1875 | int | |||
| 1876 | ip6_setmoptions(int optname, struct ip6_moptions **im6op, struct mbuf *m, | |||
| 1877 | unsigned int rtableid) | |||
| 1878 | { | |||
| 1879 | int error = 0; | |||
| 1880 | u_int loop, ifindex; | |||
| 1881 | struct ipv6_mreq *mreq; | |||
| 1882 | struct ifnet *ifp; | |||
| 1883 | struct ip6_moptions *im6o = *im6op; | |||
| 1884 | struct in6_multi_mship *imm; | |||
| 1885 | struct proc *p = curproc({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof(struct cpu_info, ci_self))); __ci;})->ci_curproc; /* XXX */ | |||
| 1886 | ||||
| 1887 | if (im6o == NULL((void *)0)) { | |||
| 1888 | /* | |||
| 1889 | * No multicast option buffer attached to the pcb; | |||
| 1890 | * allocate one and initialize to default values. | |||
| 1891 | */ | |||
| 1892 | im6o = malloc(sizeof(*im6o), M_IPMOPTS53, M_WAITOK0x0001); | |||
| 1893 | if (im6o == NULL((void *)0)) | |||
| 1894 | return (ENOBUFS55); | |||
| 1895 | *im6op = im6o; | |||
| 1896 | im6o->im6o_ifidx = 0; | |||
| 1897 | im6o->im6o_hlim = ip6_defmcasthlim; | |||
| 1898 | im6o->im6o_loop = IPV6_DEFAULT_MULTICAST_LOOP1; | |||
| 1899 | LIST_INIT(&im6o->im6o_memberships)do { ((&im6o->im6o_memberships)->lh_first) = ((void *)0); } while (0); | |||
| 1900 | } | |||
| 1901 | ||||
| 1902 | switch (optname) { | |||
| 1903 | ||||
| 1904 | case IPV6_MULTICAST_IF9: | |||
| 1905 | /* | |||
| 1906 | * Select the interface for outgoing multicast packets. | |||
| 1907 | */ | |||
| 1908 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(u_int)) { | |||
| 1909 | error = EINVAL22; | |||
| 1910 | break; | |||
| 1911 | } | |||
| 1912 | memcpy(&ifindex, mtod(m, u_int *), sizeof(ifindex))__builtin_memcpy((&ifindex), (((u_int *)((m)->m_hdr.mh_data ))), (sizeof(ifindex))); | |||
| 1913 | if (ifindex != 0) { | |||
| 1914 | ifp = if_get(ifindex); | |||
| 1915 | if (ifp == NULL((void *)0)) { | |||
| 1916 | error = ENXIO6; /* XXX EINVAL? */ | |||
| 1917 | break; | |||
| 1918 | } | |||
| 1919 | if (ifp->if_rdomainif_data.ifi_rdomain != rtable_l2(rtableid) || | |||
| 1920 | (ifp->if_flags & IFF_MULTICAST0x8000) == 0) { | |||
| 1921 | error = EADDRNOTAVAIL49; | |||
| 1922 | if_put(ifp); | |||
| 1923 | break; | |||
| 1924 | } | |||
| 1925 | if_put(ifp); | |||
| 1926 | } | |||
| 1927 | im6o->im6o_ifidx = ifindex; | |||
| 1928 | break; | |||
| 1929 | ||||
| 1930 | case IPV6_MULTICAST_HOPS10: | |||
| 1931 | { | |||
| 1932 | /* | |||
| 1933 | * Set the IP6 hoplimit for outgoing multicast packets. | |||
| 1934 | */ | |||
| 1935 | int optval; | |||
| 1936 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(int)) { | |||
| 1937 | error = EINVAL22; | |||
| 1938 | break; | |||
| 1939 | } | |||
| 1940 | memcpy(&optval, mtod(m, u_int *), sizeof(optval))__builtin_memcpy((&optval), (((u_int *)((m)->m_hdr.mh_data ))), (sizeof(optval))); | |||
| 1941 | if (optval < -1 || optval >= 256) | |||
| 1942 | error = EINVAL22; | |||
| 1943 | else if (optval == -1) | |||
| 1944 | im6o->im6o_hlim = ip6_defmcasthlim; | |||
| 1945 | else | |||
| 1946 | im6o->im6o_hlim = optval; | |||
| 1947 | break; | |||
| 1948 | } | |||
| 1949 | ||||
| 1950 | case IPV6_MULTICAST_LOOP11: | |||
| 1951 | /* | |||
| 1952 | * Set the loopback flag for outgoing multicast packets. | |||
| 1953 | * Must be zero or one. | |||
| 1954 | */ | |||
| 1955 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(u_int)) { | |||
| 1956 | error = EINVAL22; | |||
| 1957 | break; | |||
| 1958 | } | |||
| 1959 | memcpy(&loop, mtod(m, u_int *), sizeof(loop))__builtin_memcpy((&loop), (((u_int *)((m)->m_hdr.mh_data ))), (sizeof(loop))); | |||
| 1960 | if (loop > 1) { | |||
| 1961 | error = EINVAL22; | |||
| 1962 | break; | |||
| 1963 | } | |||
| 1964 | im6o->im6o_loop = loop; | |||
| 1965 | break; | |||
| 1966 | ||||
| 1967 | case IPV6_JOIN_GROUP12: | |||
| 1968 | /* | |||
| 1969 | * Add a multicast group membership. | |||
| 1970 | * Group must be a valid IP6 multicast address. | |||
| 1971 | */ | |||
| 1972 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(struct ipv6_mreq)) { | |||
| 1973 | error = EINVAL22; | |||
| 1974 | break; | |||
| 1975 | } | |||
| 1976 | mreq = mtod(m, struct ipv6_mreq *)((struct ipv6_mreq *)((m)->m_hdr.mh_data)); | |||
| 1977 | if (IN6_IS_ADDR_UNSPECIFIED(&mreq->ipv6mr_multiaddr)((*(const u_int32_t *)(const void *)(&(&mreq->ipv6mr_multiaddr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&mreq->ipv6mr_multiaddr)->__u6_addr .__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8 [8]) == 0) && (*(const u_int32_t *)(const void *)(& (&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[12] ) == 0))) { | |||
| 1978 | /* | |||
| 1979 | * We use the unspecified address to specify to accept | |||
| 1980 | * all multicast addresses. Only super user is allowed | |||
| 1981 | * to do this. | |||
| 1982 | */ | |||
| 1983 | if (suser(p)) | |||
| 1984 | { | |||
| 1985 | error = EACCES13; | |||
| 1986 | break; | |||
| 1987 | } | |||
| 1988 | } else if (!IN6_IS_ADDR_MULTICAST(&mreq->ipv6mr_multiaddr)((&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0] == 0xff)) { | |||
| 1989 | error = EINVAL22; | |||
| 1990 | break; | |||
| 1991 | } | |||
| 1992 | ||||
| 1993 | /* | |||
| 1994 | * If no interface was explicitly specified, choose an | |||
| 1995 | * appropriate one according to the given multicast address. | |||
| 1996 | */ | |||
| 1997 | if (mreq->ipv6mr_interface == 0) { | |||
| 1998 | struct rtentry *rt; | |||
| 1999 | struct sockaddr_in6 dst; | |||
| 2000 | ||||
| 2001 | memset(&dst, 0, sizeof(dst))__builtin_memset((&dst), (0), (sizeof(dst))); | |||
| 2002 | dst.sin6_len = sizeof(dst); | |||
| 2003 | dst.sin6_family = AF_INET624; | |||
| 2004 | dst.sin6_addr = mreq->ipv6mr_multiaddr; | |||
| 2005 | rt = rtalloc(sin6tosa(&dst), RT_RESOLVE1, rtableid); | |||
| 2006 | if (rt == NULL((void *)0)) { | |||
| 2007 | error = EADDRNOTAVAIL49; | |||
| 2008 | break; | |||
| 2009 | } | |||
| 2010 | ifp = if_get(rt->rt_ifidx); | |||
| 2011 | rtfree(rt); | |||
| 2012 | } else { | |||
| 2013 | /* | |||
| 2014 | * If the interface is specified, validate it. | |||
| 2015 | */ | |||
| 2016 | ifp = if_get(mreq->ipv6mr_interface); | |||
| 2017 | if (ifp == NULL((void *)0)) { | |||
| 2018 | error = ENXIO6; /* XXX EINVAL? */ | |||
| 2019 | break; | |||
| 2020 | } | |||
| 2021 | } | |||
| 2022 | ||||
| 2023 | /* | |||
| 2024 | * See if we found an interface, and confirm that it | |||
| 2025 | * supports multicast | |||
| 2026 | */ | |||
| 2027 | if (ifp == NULL((void *)0) || ifp->if_rdomainif_data.ifi_rdomain != rtable_l2(rtableid) || | |||
| 2028 | (ifp->if_flags & IFF_MULTICAST0x8000) == 0) { | |||
| 2029 | if_put(ifp); | |||
| 2030 | error = EADDRNOTAVAIL49; | |||
| 2031 | break; | |||
| 2032 | } | |||
| 2033 | /* | |||
| 2034 | * Put interface index into the multicast address, | |||
| 2035 | * if the address has link/interface-local scope. | |||
| 2036 | */ | |||
| 2037 | if (IN6_IS_SCOPE_EMBED(&mreq->ipv6mr_multiaddr)(((((&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8 [0] == 0xfe) && (((&mreq->ipv6mr_multiaddr)-> __u6_addr.__u6_addr8[1] & 0xc0) == 0x80))) || ((((&mreq ->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0] == 0xff) && (((&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[ 1] & 0x0f) == 0x02))) || ((((&mreq->ipv6mr_multiaddr )->__u6_addr.__u6_addr8[0] == 0xff) && (((&mreq ->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[1] & 0x0f ) == 0x01))))) { | |||
| 2038 | mreq->ipv6mr_multiaddr.s6_addr16__u6_addr.__u6_addr16[1] = | |||
| 2039 | htons(ifp->if_index)(__uint16_t)(__builtin_constant_p(ifp->if_index) ? (__uint16_t )(((__uint16_t)(ifp->if_index) & 0xffU) << 8 | ( (__uint16_t)(ifp->if_index) & 0xff00U) >> 8) : __swap16md (ifp->if_index)); | |||
| 2040 | } | |||
| 2041 | /* | |||
| 2042 | * See if the membership already exists. | |||
| 2043 | */ | |||
| 2044 | LIST_FOREACH(imm, &im6o->im6o_memberships, i6mm_chain)for((imm) = ((&im6o->im6o_memberships)->lh_first); ( imm)!= ((void *)0); (imm) = ((imm)->i6mm_chain.le_next)) | |||
| 2045 | if (imm->i6mm_maddr->in6m_ifidxin6m_ifma.ifma_ifidx == ifp->if_index && | |||
| 2046 | IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,(__builtin_memcmp((&(&imm->i6mm_maddr->in6m_sin .sin6_addr)->__u6_addr.__u6_addr8[0]), (&(&mreq-> ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0]), (sizeof(struct in6_addr))) == 0) | |||
| 2047 | &mreq->ipv6mr_multiaddr)(__builtin_memcmp((&(&imm->i6mm_maddr->in6m_sin .sin6_addr)->__u6_addr.__u6_addr8[0]), (&(&mreq-> ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0]), (sizeof(struct in6_addr))) == 0)) | |||
| 2048 | break; | |||
| 2049 | if (imm != NULL((void *)0)) { | |||
| 2050 | if_put(ifp); | |||
| 2051 | error = EADDRINUSE48; | |||
| 2052 | break; | |||
| 2053 | } | |||
| 2054 | /* | |||
| 2055 | * Everything looks good; add a new record to the multicast | |||
| 2056 | * address list for the given interface. | |||
| 2057 | */ | |||
| 2058 | imm = in6_joingroup(ifp, &mreq->ipv6mr_multiaddr, &error); | |||
| 2059 | if_put(ifp); | |||
| 2060 | if (!imm) | |||
| 2061 | break; | |||
| 2062 | LIST_INSERT_HEAD(&im6o->im6o_memberships, imm, i6mm_chain)do { if (((imm)->i6mm_chain.le_next = (&im6o->im6o_memberships )->lh_first) != ((void *)0)) (&im6o->im6o_memberships )->lh_first->i6mm_chain.le_prev = &(imm)->i6mm_chain .le_next; (&im6o->im6o_memberships)->lh_first = (imm ); (imm)->i6mm_chain.le_prev = &(&im6o->im6o_memberships )->lh_first; } while (0); | |||
| 2063 | break; | |||
| 2064 | ||||
| 2065 | case IPV6_LEAVE_GROUP13: | |||
| 2066 | /* | |||
| 2067 | * Drop a multicast group membership. | |||
| 2068 | * Group must be a valid IP6 multicast address. | |||
| 2069 | */ | |||
| 2070 | if (m == NULL((void *)0) || m->m_lenm_hdr.mh_len != sizeof(struct ipv6_mreq)) { | |||
| 2071 | error = EINVAL22; | |||
| 2072 | break; | |||
| 2073 | } | |||
| 2074 | mreq = mtod(m, struct ipv6_mreq *)((struct ipv6_mreq *)((m)->m_hdr.mh_data)); | |||
| 2075 | if (IN6_IS_ADDR_UNSPECIFIED(&mreq->ipv6mr_multiaddr)((*(const u_int32_t *)(const void *)(&(&mreq->ipv6mr_multiaddr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&mreq->ipv6mr_multiaddr)->__u6_addr .__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8 [8]) == 0) && (*(const u_int32_t *)(const void *)(& (&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[12] ) == 0))) { | |||
| 2076 | if (suser(p)) { | |||
| 2077 | error = EACCES13; | |||
| 2078 | break; | |||
| 2079 | } | |||
| 2080 | } else if (!IN6_IS_ADDR_MULTICAST(&mreq->ipv6mr_multiaddr)((&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0] == 0xff)) { | |||
| 2081 | error = EINVAL22; | |||
| 2082 | break; | |||
| 2083 | } | |||
| 2084 | ||||
| 2085 | /* | |||
| 2086 | * Put interface index into the multicast address, | |||
| 2087 | * if the address has link-local scope. | |||
| 2088 | */ | |||
| 2089 | if (IN6_IS_ADDR_MC_LINKLOCAL(&mreq->ipv6mr_multiaddr)(((&mreq->ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0 ] == 0xff) && (((&mreq->ipv6mr_multiaddr)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) { | |||
| 2090 | mreq->ipv6mr_multiaddr.s6_addr16__u6_addr.__u6_addr16[1] = | |||
| 2091 | htons(mreq->ipv6mr_interface)(__uint16_t)(__builtin_constant_p(mreq->ipv6mr_interface) ? (__uint16_t)(((__uint16_t)(mreq->ipv6mr_interface) & 0xffU ) << 8 | ((__uint16_t)(mreq->ipv6mr_interface) & 0xff00U) >> 8) : __swap16md(mreq->ipv6mr_interface) ); | |||
| 2092 | } | |||
| 2093 | ||||
| 2094 | /* | |||
| 2095 | * If an interface address was specified, get a pointer | |||
| 2096 | * to its ifnet structure. | |||
| 2097 | */ | |||
| 2098 | if (mreq->ipv6mr_interface == 0) | |||
| 2099 | ifp = NULL((void *)0); | |||
| 2100 | else { | |||
| 2101 | ifp = if_get(mreq->ipv6mr_interface); | |||
| 2102 | if (ifp == NULL((void *)0)) { | |||
| 2103 | error = ENXIO6; /* XXX EINVAL? */ | |||
| 2104 | break; | |||
| 2105 | } | |||
| 2106 | } | |||
| 2107 | ||||
| 2108 | /* | |||
| 2109 | * Find the membership in the membership list. | |||
| 2110 | */ | |||
| 2111 | LIST_FOREACH(imm, &im6o->im6o_memberships, i6mm_chain)for((imm) = ((&im6o->im6o_memberships)->lh_first); ( imm)!= ((void *)0); (imm) = ((imm)->i6mm_chain.le_next)) { | |||
| 2112 | if ((ifp == NULL((void *)0) || | |||
| 2113 | imm->i6mm_maddr->in6m_ifidxin6m_ifma.ifma_ifidx == ifp->if_index) && | |||
| 2114 | IN6_ARE_ADDR_EQUAL(&imm->i6mm_maddr->in6m_addr,(__builtin_memcmp((&(&imm->i6mm_maddr->in6m_sin .sin6_addr)->__u6_addr.__u6_addr8[0]), (&(&mreq-> ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0]), (sizeof(struct in6_addr))) == 0) | |||
| 2115 | &mreq->ipv6mr_multiaddr)(__builtin_memcmp((&(&imm->i6mm_maddr->in6m_sin .sin6_addr)->__u6_addr.__u6_addr8[0]), (&(&mreq-> ipv6mr_multiaddr)->__u6_addr.__u6_addr8[0]), (sizeof(struct in6_addr))) == 0)) | |||
| 2116 | break; | |||
| 2117 | } | |||
| 2118 | ||||
| 2119 | if_put(ifp); | |||
| 2120 | ||||
| 2121 | if (imm == NULL((void *)0)) { | |||
| 2122 | /* Unable to resolve interface */ | |||
| 2123 | error = EADDRNOTAVAIL49; | |||
| 2124 | break; | |||
| 2125 | } | |||
| 2126 | /* | |||
| 2127 | * Give up the multicast address record to which the | |||
| 2128 | * membership points. | |||
| 2129 | */ | |||
| 2130 | LIST_REMOVE(imm, i6mm_chain)do { if ((imm)->i6mm_chain.le_next != ((void *)0)) (imm)-> i6mm_chain.le_next->i6mm_chain.le_prev = (imm)->i6mm_chain .le_prev; *(imm)->i6mm_chain.le_prev = (imm)->i6mm_chain .le_next; ((imm)->i6mm_chain.le_prev) = ((void *)-1); ((imm )->i6mm_chain.le_next) = ((void *)-1); } while (0); | |||
| 2131 | in6_leavegroup(imm); | |||
| 2132 | break; | |||
| 2133 | ||||
| 2134 | default: | |||
| 2135 | error = EOPNOTSUPP45; | |||
| 2136 | break; | |||
| 2137 | } | |||
| 2138 | ||||
| 2139 | /* | |||
| 2140 | * If all options have default values, no need to keep the option | |||
| 2141 | * structure. | |||
| 2142 | */ | |||
| 2143 | if (im6o->im6o_ifidx == 0 && | |||
| 2144 | im6o->im6o_hlim == ip6_defmcasthlim && | |||
| 2145 | im6o->im6o_loop == IPV6_DEFAULT_MULTICAST_LOOP1 && | |||
| 2146 | LIST_EMPTY(&im6o->im6o_memberships)(((&im6o->im6o_memberships)->lh_first) == ((void *) 0))) { | |||
| 2147 | free(*im6op, M_IPMOPTS53, sizeof(**im6op)); | |||
| 2148 | *im6op = NULL((void *)0); | |||
| 2149 | } | |||
| 2150 | ||||
| 2151 | return (error); | |||
| 2152 | } | |||
| 2153 | ||||
| 2154 | /* | |||
| 2155 | * Return the IP6 multicast options in response to user getsockopt(). | |||
| 2156 | */ | |||
| 2157 | int | |||
| 2158 | ip6_getmoptions(int optname, struct ip6_moptions *im6o, struct mbuf *m) | |||
| 2159 | { | |||
| 2160 | u_int *hlim, *loop, *ifindex; | |||
| 2161 | ||||
| 2162 | switch (optname) { | |||
| 2163 | case IPV6_MULTICAST_IF9: | |||
| 2164 | ifindex = mtod(m, u_int *)((u_int *)((m)->m_hdr.mh_data)); | |||
| 2165 | m->m_lenm_hdr.mh_len = sizeof(u_int); | |||
| 2166 | if (im6o == NULL((void *)0) || im6o->im6o_ifidx == 0) | |||
| 2167 | *ifindex = 0; | |||
| 2168 | else | |||
| 2169 | *ifindex = im6o->im6o_ifidx; | |||
| 2170 | return (0); | |||
| 2171 | ||||
| 2172 | case IPV6_MULTICAST_HOPS10: | |||
| 2173 | hlim = mtod(m, u_int *)((u_int *)((m)->m_hdr.mh_data)); | |||
| 2174 | m->m_lenm_hdr.mh_len = sizeof(u_int); | |||
| 2175 | if (im6o == NULL((void *)0)) | |||
| 2176 | *hlim = ip6_defmcasthlim; | |||
| 2177 | else | |||
| 2178 | *hlim = im6o->im6o_hlim; | |||
| 2179 | return (0); | |||
| 2180 | ||||
| 2181 | case IPV6_MULTICAST_LOOP11: | |||
| 2182 | loop = mtod(m, u_int *)((u_int *)((m)->m_hdr.mh_data)); | |||
| 2183 | m->m_lenm_hdr.mh_len = sizeof(u_int); | |||
| 2184 | if (im6o == NULL((void *)0)) | |||
| 2185 | *loop = ip6_defmcasthlim; | |||
| 2186 | else | |||
| 2187 | *loop = im6o->im6o_loop; | |||
| 2188 | return (0); | |||
| 2189 | ||||
| 2190 | default: | |||
| 2191 | return (EOPNOTSUPP45); | |||
| 2192 | } | |||
| 2193 | } | |||
| 2194 | ||||
| 2195 | /* | |||
| 2196 | * Discard the IP6 multicast options. | |||
| 2197 | */ | |||
| 2198 | void | |||
| 2199 | ip6_freemoptions(struct ip6_moptions *im6o) | |||
| 2200 | { | |||
| 2201 | struct in6_multi_mship *imm; | |||
| 2202 | ||||
| 2203 | if (im6o == NULL((void *)0)) | |||
| 2204 | return; | |||
| 2205 | ||||
| 2206 | while (!LIST_EMPTY(&im6o->im6o_memberships)(((&im6o->im6o_memberships)->lh_first) == ((void *) 0))) { | |||
| 2207 | imm = LIST_FIRST(&im6o->im6o_memberships)((&im6o->im6o_memberships)->lh_first); | |||
| 2208 | LIST_REMOVE(imm, i6mm_chain)do { if ((imm)->i6mm_chain.le_next != ((void *)0)) (imm)-> i6mm_chain.le_next->i6mm_chain.le_prev = (imm)->i6mm_chain .le_prev; *(imm)->i6mm_chain.le_prev = (imm)->i6mm_chain .le_next; ((imm)->i6mm_chain.le_prev) = ((void *)-1); ((imm )->i6mm_chain.le_next) = ((void *)-1); } while (0); | |||
| 2209 | in6_leavegroup(imm); | |||
| 2210 | } | |||
| 2211 | free(im6o, M_IPMOPTS53, sizeof(*im6o)); | |||
| 2212 | } | |||
| 2213 | ||||
| 2214 | /* | |||
| 2215 | * Set IPv6 outgoing packet options based on advanced API. | |||
| 2216 | */ | |||
| 2217 | int | |||
| 2218 | ip6_setpktopts(struct mbuf *control, struct ip6_pktopts *opt, | |||
| 2219 | struct ip6_pktopts *stickyopt, int priv, int uproto) | |||
| 2220 | { | |||
| 2221 | u_int clen; | |||
| 2222 | struct cmsghdr *cm = 0; | |||
| 2223 | caddr_t cmsgs; | |||
| 2224 | int error; | |||
| 2225 | ||||
| 2226 | if (control == NULL((void *)0) || opt == NULL((void *)0)) | |||
| 2227 | return (EINVAL22); | |||
| 2228 | ||||
| 2229 | ip6_initpktopts(opt); | |||
| 2230 | if (stickyopt) { | |||
| 2231 | int error; | |||
| 2232 | ||||
| 2233 | /* | |||
| 2234 | * If stickyopt is provided, make a local copy of the options | |||
| 2235 | * for this particular packet, then override them by ancillary | |||
| 2236 | * objects. | |||
| 2237 | * XXX: copypktopts() does not copy the cached route to a next | |||
| 2238 | * hop (if any). This is not very good in terms of efficiency, | |||
| 2239 | * but we can allow this since this option should be rarely | |||
| 2240 | * used. | |||
| 2241 | */ | |||
| 2242 | if ((error = copypktopts(opt, stickyopt)) != 0) | |||
| 2243 | return (error); | |||
| 2244 | } | |||
| 2245 | ||||
| 2246 | /* | |||
| 2247 | * XXX: Currently, we assume all the optional information is stored | |||
| 2248 | * in a single mbuf. | |||
| 2249 | */ | |||
| 2250 | if (control->m_nextm_hdr.mh_next) | |||
| 2251 | return (EINVAL22); | |||
| 2252 | ||||
| 2253 | clen = control->m_lenm_hdr.mh_len; | |||
| 2254 | cmsgs = mtod(control, caddr_t)((caddr_t)((control)->m_hdr.mh_data)); | |||
| 2255 | do { | |||
| 2256 | if (clen < CMSG_LEN(0)((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (0))) | |||
| 2257 | return (EINVAL22); | |||
| 2258 | cm = (struct cmsghdr *)cmsgs; | |||
| 2259 | if (cm->cmsg_len < CMSG_LEN(0)((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (0)) || cm->cmsg_len > clen || | |||
| 2260 | CMSG_ALIGN(cm->cmsg_len)(((unsigned long)(cm->cmsg_len) + (sizeof(long) - 1)) & ~(sizeof(long) - 1)) > clen) | |||
| 2261 | return (EINVAL22); | |||
| 2262 | if (cm->cmsg_level == IPPROTO_IPV641) { | |||
| 2263 | error = ip6_setpktopt(cm->cmsg_type, CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))), | |||
| 2264 | cm->cmsg_len - CMSG_LEN(0)((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (0)), opt, priv, 0, uproto); | |||
| 2265 | if (error) | |||
| 2266 | return (error); | |||
| 2267 | } | |||
| 2268 | ||||
| 2269 | clen -= CMSG_ALIGN(cm->cmsg_len)(((unsigned long)(cm->cmsg_len) + (sizeof(long) - 1)) & ~(sizeof(long) - 1)); | |||
| 2270 | cmsgs += CMSG_ALIGN(cm->cmsg_len)(((unsigned long)(cm->cmsg_len) + (sizeof(long) - 1)) & ~(sizeof(long) - 1)); | |||
| 2271 | } while (clen); | |||
| 2272 | ||||
| 2273 | return (0); | |||
| 2274 | } | |||
| 2275 | ||||
| 2276 | /* | |||
| 2277 | * Set a particular packet option, as a sticky option or an ancillary data | |||
| 2278 | * item. "len" can be 0 only when it's a sticky option. | |||
| 2279 | */ | |||
| 2280 | int | |||
| 2281 | ip6_setpktopt(int optname, u_char *buf, int len, struct ip6_pktopts *opt, | |||
| 2282 | int priv, int sticky, int uproto) | |||
| 2283 | { | |||
| 2284 | int minmtupolicy; | |||
| 2285 | ||||
| 2286 | switch (optname) { | |||
| 2287 | case IPV6_PKTINFO46: | |||
| 2288 | { | |||
| 2289 | struct ifnet *ifp = NULL((void *)0); | |||
| 2290 | struct in6_pktinfo *pktinfo; | |||
| 2291 | ||||
| 2292 | if (len != sizeof(struct in6_pktinfo)) | |||
| 2293 | return (EINVAL22); | |||
| 2294 | ||||
| 2295 | pktinfo = (struct in6_pktinfo *)buf; | |||
| 2296 | ||||
| 2297 | /* | |||
| 2298 | * An application can clear any sticky IPV6_PKTINFO option by | |||
| 2299 | * doing a "regular" setsockopt with ipi6_addr being | |||
| 2300 | * in6addr_any and ipi6_ifindex being zero. | |||
| 2301 | * [RFC 3542, Section 6] | |||
| 2302 | */ | |||
| 2303 | if (opt->ip6po_pktinfo && | |||
| 2304 | pktinfo->ipi6_ifindex == 0 && | |||
| 2305 | IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)((*(const u_int32_t *)(const void *)(&(&pktinfo->ipi6_addr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&pktinfo->ipi6_addr)->__u6_addr .__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&pktinfo->ipi6_addr)->__u6_addr.__u6_addr8 [8]) == 0) && (*(const u_int32_t *)(const void *)(& (&pktinfo->ipi6_addr)->__u6_addr.__u6_addr8[12]) == 0))) { | |||
| 2306 | ip6_clearpktopts(opt, optname); | |||
| 2307 | break; | |||
| 2308 | } | |||
| 2309 | ||||
| 2310 | if (uproto == IPPROTO_TCP6 && | |||
| 2311 | sticky && !IN6_IS_ADDR_UNSPECIFIED(&pktinfo->ipi6_addr)((*(const u_int32_t *)(const void *)(&(&pktinfo->ipi6_addr )->__u6_addr.__u6_addr8[0]) == 0) && (*(const u_int32_t *)(const void *)(&(&pktinfo->ipi6_addr)->__u6_addr .__u6_addr8[4]) == 0) && (*(const u_int32_t *)(const void *)(&(&pktinfo->ipi6_addr)->__u6_addr.__u6_addr8 [8]) == 0) && (*(const u_int32_t *)(const void *)(& (&pktinfo->ipi6_addr)->__u6_addr.__u6_addr8[12]) == 0))) { | |||
| 2312 | return (EINVAL22); | |||
| 2313 | } | |||
| 2314 | ||||
| 2315 | if (pktinfo->ipi6_ifindex) { | |||
| 2316 | ifp = if_get(pktinfo->ipi6_ifindex); | |||
| 2317 | if (ifp == NULL((void *)0)) | |||
| 2318 | return (ENXIO6); | |||
| 2319 | if_put(ifp); | |||
| 2320 | } | |||
| 2321 | ||||
| 2322 | /* | |||
| 2323 | * We store the address anyway, and let in6_selectsrc() | |||
| 2324 | * validate the specified address. This is because ipi6_addr | |||
| 2325 | * may not have enough information about its scope zone, and | |||
| 2326 | * we may need additional information (such as outgoing | |||
| 2327 | * interface or the scope zone of a destination address) to | |||
| 2328 | * disambiguate the scope. | |||
| 2329 | * XXX: the delay of the validation may confuse the | |||
| 2330 | * application when it is used as a sticky option. | |||
| 2331 | */ | |||
| 2332 | if (opt->ip6po_pktinfo == NULL((void *)0)) { | |||
| 2333 | opt->ip6po_pktinfo = malloc(sizeof(*pktinfo), | |||
| 2334 | M_IP6OPT123, M_NOWAIT0x0002); | |||
| 2335 | if (opt->ip6po_pktinfo == NULL((void *)0)) | |||
| 2336 | return (ENOBUFS55); | |||
| 2337 | } | |||
| 2338 | bcopy(pktinfo, opt->ip6po_pktinfo, sizeof(*pktinfo)); | |||
| 2339 | break; | |||
| 2340 | } | |||
| 2341 | ||||
| 2342 | case IPV6_HOPLIMIT47: | |||
| 2343 | { | |||
| 2344 | int *hlimp; | |||
| 2345 | ||||
| 2346 | /* | |||
| 2347 | * RFC 3542 deprecated the usage of sticky IPV6_HOPLIMIT | |||
| 2348 | * to simplify the ordering among hoplimit options. | |||
| 2349 | */ | |||
| 2350 | if (sticky) | |||
| 2351 | return (ENOPROTOOPT42); | |||
| 2352 | ||||
| 2353 | if (len != sizeof(int)) | |||
| 2354 | return (EINVAL22); | |||
| 2355 | hlimp = (int *)buf; | |||
| 2356 | if (*hlimp < -1 || *hlimp > 255) | |||
| 2357 | return (EINVAL22); | |||
| 2358 | ||||
| 2359 | opt->ip6po_hlim = *hlimp; | |||
| 2360 | break; | |||
| 2361 | } | |||
| 2362 | ||||
| 2363 | case IPV6_TCLASS61: | |||
| 2364 | { | |||
| 2365 | int tclass; | |||
| 2366 | ||||
| 2367 | if (len != sizeof(int)) | |||
| 2368 | return (EINVAL22); | |||
| 2369 | tclass = *(int *)buf; | |||
| 2370 | if (tclass < -1 || tclass > 255) | |||
| 2371 | return (EINVAL22); | |||
| 2372 | ||||
| 2373 | opt->ip6po_tclass = tclass; | |||
| 2374 | break; | |||
| 2375 | } | |||
| 2376 | case IPV6_HOPOPTS49: | |||
| 2377 | { | |||
| 2378 | struct ip6_hbh *hbh; | |||
| 2379 | int hbhlen; | |||
| 2380 | ||||
| 2381 | /* | |||
| 2382 | * XXX: We don't allow a non-privileged user to set ANY HbH | |||
| 2383 | * options, since per-option restriction has too much | |||
| 2384 | * overhead. | |||
| 2385 | */ | |||
| 2386 | if (!priv) | |||
| 2387 | return (EPERM1); | |||
| 2388 | ||||
| 2389 | if (len == 0) { | |||
| 2390 | ip6_clearpktopts(opt, IPV6_HOPOPTS49); | |||
| 2391 | break; /* just remove the option */ | |||
| 2392 | } | |||
| 2393 | ||||
| 2394 | /* message length validation */ | |||
| 2395 | if (len < sizeof(struct ip6_hbh)) | |||
| 2396 | return (EINVAL22); | |||
| 2397 | hbh = (struct ip6_hbh *)buf; | |||
| 2398 | hbhlen = (hbh->ip6h_len + 1) << 3; | |||
| 2399 | if (len != hbhlen) | |||
| 2400 | return (EINVAL22); | |||
| 2401 | ||||
| 2402 | /* turn off the previous option, then set the new option. */ | |||
| 2403 | ip6_clearpktopts(opt, IPV6_HOPOPTS49); | |||
| 2404 | opt->ip6po_hbh = malloc(hbhlen, M_IP6OPT123, M_NOWAIT0x0002); | |||
| 2405 | if (opt->ip6po_hbh == NULL((void *)0)) | |||
| 2406 | return (ENOBUFS55); | |||
| 2407 | memcpy(opt->ip6po_hbh, hbh, hbhlen)__builtin_memcpy((opt->ip6po_hbh), (hbh), (hbhlen)); | |||
| 2408 | ||||
| 2409 | break; | |||
| 2410 | } | |||
| 2411 | ||||
| 2412 | case IPV6_DSTOPTS50: | |||
| 2413 | case IPV6_RTHDRDSTOPTS35: | |||
| 2414 | { | |||
| 2415 | struct ip6_dest *dest, **newdest = NULL((void *)0); | |||
| 2416 | int destlen; | |||
| 2417 | ||||
| 2418 | if (!priv) /* XXX: see the comment for IPV6_HOPOPTS */ | |||
| 2419 | return (EPERM1); | |||
| 2420 | ||||
| 2421 | if (len == 0) { | |||
| 2422 | ip6_clearpktopts(opt, optname); | |||
| 2423 | break; /* just remove the option */ | |||
| 2424 | } | |||
| 2425 | ||||
| 2426 | /* message length validation */ | |||
| 2427 | if (len < sizeof(struct ip6_dest)) | |||
| 2428 | return (EINVAL22); | |||
| 2429 | dest = (struct ip6_dest *)buf; | |||
| 2430 | destlen = (dest->ip6d_len + 1) << 3; | |||
| 2431 | if (len != destlen) | |||
| 2432 | return (EINVAL22); | |||
| 2433 | /* | |||
| 2434 | * Determine the position that the destination options header | |||
| 2435 | * should be inserted; before or after the routing header. | |||
| 2436 | */ | |||
| 2437 | switch (optname) { | |||
| 2438 | case IPV6_RTHDRDSTOPTS35: | |||
| 2439 | newdest = &opt->ip6po_dest1; | |||
| 2440 | break; | |||
| 2441 | case IPV6_DSTOPTS50: | |||
| 2442 | newdest = &opt->ip6po_dest2; | |||
| 2443 | break; | |||
| 2444 | } | |||
| 2445 | ||||
| 2446 | /* turn off the previous option, then set the new option. */ | |||
| 2447 | ip6_clearpktopts(opt, optname); | |||
| 2448 | *newdest = malloc(destlen, M_IP6OPT123, M_NOWAIT0x0002); | |||
| 2449 | if (*newdest == NULL((void *)0)) | |||
| 2450 | return (ENOBUFS55); | |||
| 2451 | memcpy(*newdest, dest, destlen)__builtin_memcpy((*newdest), (dest), (destlen)); | |||
| 2452 | ||||
| 2453 | break; | |||
| 2454 | } | |||
| 2455 | ||||
| 2456 | case IPV6_RTHDR51: | |||
| 2457 | { | |||
| 2458 | struct ip6_rthdr *rth; | |||
| 2459 | int rthlen; | |||
| 2460 | ||||
| 2461 | if (len == 0) { | |||
| 2462 | ip6_clearpktopts(opt, IPV6_RTHDR51); | |||
| 2463 | break; /* just remove the option */ | |||
| 2464 | } | |||
| 2465 | ||||
| 2466 | /* message length validation */ | |||
| 2467 | if (len < sizeof(struct ip6_rthdr)) | |||
| 2468 | return (EINVAL22); | |||
| 2469 | rth = (struct ip6_rthdr *)buf; | |||
| 2470 | rthlen = (rth->ip6r_len + 1) << 3; | |||
| 2471 | if (len != rthlen) | |||
| 2472 | return (EINVAL22); | |||
| 2473 | ||||
| 2474 | switch (rth->ip6r_type) { | |||
| 2475 | case IPV6_RTHDR_TYPE_00: | |||
| 2476 | if (rth->ip6r_len == 0) /* must contain one addr */ | |||
| 2477 | return (EINVAL22); | |||
| 2478 | if (rth->ip6r_len % 2) /* length must be even */ | |||
| 2479 | return (EINVAL22); | |||
| 2480 | if (rth->ip6r_len / 2 != rth->ip6r_segleft) | |||
| 2481 | return (EINVAL22); | |||
| 2482 | break; | |||
| 2483 | default: | |||
| 2484 | return (EINVAL22); /* not supported */ | |||
| 2485 | } | |||
| 2486 | /* turn off the previous option */ | |||
| 2487 | ip6_clearpktopts(opt, IPV6_RTHDR51); | |||
| 2488 | opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr = malloc(rthlen, M_IP6OPT123, M_NOWAIT0x0002); | |||
| 2489 | if (opt->ip6po_rthdrip6po_rhinfo.ip6po_rhi_rthdr == NULL((void *)0)) | |||
| 2490 | return (ENOBUFS55); | |||
| 2491 | memcpy(opt->ip6po_rthdr, rth, rthlen)__builtin_memcpy((opt->ip6po_rhinfo.ip6po_rhi_rthdr), (rth ), (rthlen)); | |||
| 2492 | break; | |||
| 2493 | } | |||
| 2494 | ||||
| 2495 | case IPV6_USE_MIN_MTU42: | |||
| 2496 | if (len != sizeof(int)) | |||
| 2497 | return (EINVAL22); | |||
| 2498 | minmtupolicy = *(int *)buf; | |||
| 2499 | if (minmtupolicy != IP6PO_MINMTU_MCASTONLY-1 && | |||
| 2500 | minmtupolicy != IP6PO_MINMTU_DISABLE0 && | |||
| 2501 | minmtupolicy != IP6PO_MINMTU_ALL1) { | |||
| 2502 | return (EINVAL22); | |||
| 2503 | } | |||
| 2504 | opt->ip6po_minmtu = minmtupolicy; | |||
| 2505 | break; | |||
| 2506 | ||||
| 2507 | case IPV6_DONTFRAG62: | |||
| 2508 | if (len != sizeof(int)) | |||
| 2509 | return (EINVAL22); | |||
| 2510 | ||||
| 2511 | if (uproto == IPPROTO_TCP6 || *(int *)buf == 0) { | |||
| 2512 | /* | |||
| 2513 | * we ignore this option for TCP sockets. | |||
| 2514 | * (RFC3542 leaves this case unspecified.) | |||
| 2515 | */ | |||
| 2516 | opt->ip6po_flags &= ~IP6PO_DONTFRAG0x04; | |||
| 2517 | } else | |||
| 2518 | opt->ip6po_flags |= IP6PO_DONTFRAG0x04; | |||
| 2519 | break; | |||
| 2520 | ||||
| 2521 | default: | |||
| 2522 | return (ENOPROTOOPT42); | |||
| 2523 | } /* end of switch */ | |||
| 2524 | ||||
| 2525 | return (0); | |||
| 2526 | } | |||
| 2527 | ||||
| 2528 | /* | |||
| 2529 | * Routine called from ip6_output() to loop back a copy of an IP6 multicast | |||
| 2530 | * packet to the input queue of a specified interface. | |||
| 2531 | */ | |||
| 2532 | void | |||
| 2533 | ip6_mloopback(struct ifnet *ifp, struct mbuf *m, struct sockaddr_in6 *dst) | |||
| 2534 | { | |||
| 2535 | struct mbuf *copym; | |||
| 2536 | struct ip6_hdr *ip6; | |||
| 2537 | ||||
| 2538 | /* | |||
| 2539 | * Duplicate the packet. | |||
| 2540 | */ | |||
| 2541 | copym = m_copym(m, 0, M_COPYALL1000000000, M_NOWAIT0x0002); | |||
| 2542 | if (copym == NULL((void *)0)) | |||
| 2543 | return; | |||
| 2544 | ||||
| 2545 | /* | |||
| 2546 | * Make sure to deep-copy IPv6 header portion in case the data | |||
| 2547 | * is in an mbuf cluster, so that we can safely override the IPv6 | |||
| 2548 | * header portion later. | |||
| 2549 | */ | |||
| 2550 | if ((copym->m_flagsm_hdr.mh_flags & M_EXT0x0001) != 0 || | |||
| 2551 | copym->m_lenm_hdr.mh_len < sizeof(struct ip6_hdr)) { | |||
| 2552 | copym = m_pullup(copym, sizeof(struct ip6_hdr)); | |||
| 2553 | if (copym == NULL((void *)0)) | |||
| 2554 | return; | |||
| 2555 | } | |||
| 2556 | ||||
| 2557 | #ifdef DIAGNOSTIC1 | |||
| 2558 | if (copym->m_lenm_hdr.mh_len < sizeof(*ip6)) { | |||
| 2559 | m_freem(copym); | |||
| 2560 | return; | |||
| 2561 | } | |||
| 2562 | #endif | |||
| 2563 | ||||
| 2564 | ip6 = mtod(copym, struct ip6_hdr *)((struct ip6_hdr *)((copym)->m_hdr.mh_data)); | |||
| 2565 | if (IN6_IS_SCOPE_EMBED(&ip6->ip6_src)(((((&ip6->ip6_src)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ip6->ip6_src)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) || ((((&ip6->ip6_src)->__u6_addr .__u6_addr8[0] == 0xff) && (((&ip6->ip6_src)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((&ip6 ->ip6_src)->__u6_addr.__u6_addr8[0] == 0xff) && (((&ip6->ip6_src)->__u6_addr.__u6_addr8[1] & 0x0f ) == 0x01))))) | |||
| 2566 | ip6->ip6_src.s6_addr16__u6_addr.__u6_addr16[1] = 0; | |||
| 2567 | if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst)(((((&ip6->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xfe ) && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8 [1] & 0xc0) == 0x80))) || ((((&ip6->ip6_dst)->__u6_addr .__u6_addr8[0] == 0xff) && (((&ip6->ip6_dst)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((&ip6 ->ip6_dst)->__u6_addr.__u6_addr8[0] == 0xff) && (((&ip6->ip6_dst)->__u6_addr.__u6_addr8[1] & 0x0f ) == 0x01))))) | |||
| 2568 | ip6->ip6_dst.s6_addr16__u6_addr.__u6_addr16[1] = 0; | |||
| 2569 | ||||
| 2570 | if_input_local(ifp, copym, dst->sin6_family); | |||
| 2571 | } | |||
| 2572 | ||||
| 2573 | /* | |||
| 2574 | * Chop IPv6 header off from the payload. | |||
| 2575 | */ | |||
| 2576 | int | |||
| 2577 | ip6_splithdr(struct mbuf *m, struct ip6_exthdrs *exthdrs) | |||
| 2578 | { | |||
| 2579 | struct mbuf *mh; | |||
| 2580 | struct ip6_hdr *ip6; | |||
| 2581 | ||||
| 2582 | ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 2583 | if (m->m_lenm_hdr.mh_len > sizeof(*ip6)) { | |||
| 2584 | MGET(mh, M_DONTWAIT, MT_HEADER)mh = m_get((0x0002), (2)); | |||
| 2585 | if (mh == NULL((void *)0)) { | |||
| 2586 | m_freem(m); | |||
| 2587 | return ENOBUFS55; | |||
| 2588 | } | |||
| 2589 | M_MOVE_PKTHDR(mh, m)do { (mh)->m_hdr.mh_flags = ((mh)->m_hdr.mh_flags & (0x0001 | 0x0008)); (mh)->m_hdr.mh_flags |= (m)->m_hdr .mh_flags & (0x0002|0x0004|0x0010|0x0100|0x0200|0x0400|0x4000 | 0x0800|0x0040|0x1000|0x8000|0x0020|0x2000); do { ((mh))-> M_dat.MH.MH_pkthdr = ((m))->M_dat.MH.MH_pkthdr; ((m))-> m_hdr.mh_flags &= ~0x0002; { ((&((m))->M_dat.MH.MH_pkthdr .ph_tags)->slh_first) = ((void *)0); }; ((m))->M_dat.MH .MH_pkthdr.pf.statekey = ((void *)0); } while ( 0); if (((mh) ->m_hdr.mh_flags & 0x0001) == 0) (mh)->m_hdr.mh_data = (mh)->M_dat.MH.MH_dat.MH_databuf; } while ( 0); | |||
| 2590 | m_align(mh, sizeof(*ip6)); | |||
| 2591 | m->m_lenm_hdr.mh_len -= sizeof(*ip6); | |||
| 2592 | m->m_datam_hdr.mh_data += sizeof(*ip6); | |||
| 2593 | mh->m_nextm_hdr.mh_next = m; | |||
| 2594 | m = mh; | |||
| 2595 | m->m_lenm_hdr.mh_len = sizeof(*ip6); | |||
| 2596 | bcopy((caddr_t)ip6, mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)), sizeof(*ip6)); | |||
| 2597 | } | |||
| 2598 | exthdrs->ip6e_ip6 = m; | |||
| 2599 | return 0; | |||
| 2600 | } | |||
| 2601 | ||||
| 2602 | u_int32_t | |||
| 2603 | ip6_randomid(void) | |||
| 2604 | { | |||
| 2605 | return idgen32(&ip6_id_ctx); | |||
| 2606 | } | |||
| 2607 | ||||
| 2608 | void | |||
| 2609 | ip6_randomid_init(void) | |||
| 2610 | { | |||
| 2611 | idgen32_init(&ip6_id_ctx); | |||
| 2612 | } | |||
| 2613 | ||||
| 2614 | /* | |||
| 2615 | * Compute significant parts of the IPv6 checksum pseudo-header | |||
| 2616 | * for use in a delayed TCP/UDP checksum calculation. | |||
| 2617 | */ | |||
| 2618 | static __inline u_int16_t __attribute__((__unused__)) | |||
| 2619 | in6_cksum_phdr(const struct in6_addr *src, const struct in6_addr *dst, | |||
| 2620 | u_int32_t len, u_int32_t nxt) | |||
| 2621 | { | |||
| 2622 | u_int32_t sum = 0; | |||
| 2623 | const u_int16_t *w; | |||
| 2624 | ||||
| 2625 | w = (const u_int16_t *) src; | |||
| 2626 | sum += w[0]; | |||
| 2627 | if (!IN6_IS_SCOPE_EMBED(src)(((((src)->__u6_addr.__u6_addr8[0] == 0xfe) && ((( src)->__u6_addr.__u6_addr8[1] & 0xc0) == 0x80))) || (( ((src)->__u6_addr.__u6_addr8[0] == 0xff) && (((src )->__u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((src )->__u6_addr.__u6_addr8[0] == 0xff) && (((src)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x01))))) | |||
| 2628 | sum += w[1]; | |||
| 2629 | sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5]; | |||
| 2630 | sum += w[6]; sum += w[7]; | |||
| 2631 | ||||
| 2632 | w = (const u_int16_t *) dst; | |||
| 2633 | sum += w[0]; | |||
| 2634 | if (!IN6_IS_SCOPE_EMBED(dst)(((((dst)->__u6_addr.__u6_addr8[0] == 0xfe) && ((( dst)->__u6_addr.__u6_addr8[1] & 0xc0) == 0x80))) || (( ((dst)->__u6_addr.__u6_addr8[0] == 0xff) && (((dst )->__u6_addr.__u6_addr8[1] & 0x0f) == 0x02))) || ((((dst )->__u6_addr.__u6_addr8[0] == 0xff) && (((dst)-> __u6_addr.__u6_addr8[1] & 0x0f) == 0x01))))) | |||
| 2635 | sum += w[1]; | |||
| 2636 | sum += w[2]; sum += w[3]; sum += w[4]; sum += w[5]; | |||
| 2637 | sum += w[6]; sum += w[7]; | |||
| 2638 | ||||
| 2639 | sum += (u_int16_t)(len >> 16) + (u_int16_t)(len /*& 0xffff*/); | |||
| 2640 | ||||
| 2641 | sum += (u_int16_t)(nxt >> 16) + (u_int16_t)(nxt /*& 0xffff*/); | |||
| 2642 | ||||
| 2643 | sum = (u_int16_t)(sum >> 16) + (u_int16_t)(sum /*& 0xffff*/); | |||
| 2644 | ||||
| 2645 | if (sum > 0xffff) | |||
| 2646 | sum -= 0xffff; | |||
| 2647 | ||||
| 2648 | return (sum); | |||
| 2649 | } | |||
| 2650 | ||||
| 2651 | /* | |||
| 2652 | * Process a delayed payload checksum calculation. | |||
| 2653 | */ | |||
| 2654 | void | |||
| 2655 | in6_delayed_cksum(struct mbuf *m, u_int8_t nxt) | |||
| 2656 | { | |||
| 2657 | int nxtp, offset; | |||
| 2658 | u_int16_t csum; | |||
| 2659 | ||||
| 2660 | offset = ip6_lasthdr(m, 0, IPPROTO_IPV641, &nxtp); | |||
| 2661 | if (offset <= 0 || nxtp != nxt) | |||
| 2662 | /* If the desired next protocol isn't found, punt. */ | |||
| 2663 | return; | |||
| 2664 | csum = (u_int16_t)(in6_cksum(m, 0, offset, m->m_pkthdrM_dat.MH.MH_pkthdr.len - offset)); | |||
| 2665 | ||||
| 2666 | switch (nxt) { | |||
| 2667 | case IPPROTO_TCP6: | |||
| 2668 | offset += offsetof(struct tcphdr, th_sum)__builtin_offsetof(struct tcphdr, th_sum); | |||
| 2669 | break; | |||
| 2670 | ||||
| 2671 | case IPPROTO_UDP17: | |||
| 2672 | offset += offsetof(struct udphdr, uh_sum)__builtin_offsetof(struct udphdr, uh_sum); | |||
| 2673 | if (csum == 0) | |||
| 2674 | csum = 0xffff; | |||
| 2675 | break; | |||
| 2676 | ||||
| 2677 | case IPPROTO_ICMPV658: | |||
| 2678 | offset += offsetof(struct icmp6_hdr, icmp6_cksum)__builtin_offsetof(struct icmp6_hdr, icmp6_cksum); | |||
| 2679 | break; | |||
| 2680 | } | |||
| 2681 | ||||
| 2682 | if ((offset + sizeof(u_int16_t)) > m->m_lenm_hdr.mh_len) | |||
| 2683 | m_copyback(m, offset, sizeof(csum), &csum, M_NOWAIT0x0002); | |||
| 2684 | else | |||
| 2685 | *(u_int16_t *)(mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)) + offset) = csum; | |||
| 2686 | } | |||
| 2687 | ||||
| 2688 | void | |||
| 2689 | in6_proto_cksum_out(struct mbuf *m, struct ifnet *ifp) | |||
| 2690 | { | |||
| 2691 | struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 2692 | ||||
| 2693 | /* some hw and in6_delayed_cksum need the pseudo header cksum */ | |||
| 2694 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags & | |||
| 2695 | (M_TCP_CSUM_OUT0x0002|M_UDP_CSUM_OUT0x0004|M_ICMP_CSUM_OUT0x0200)) { | |||
| 2696 | int nxt, offset; | |||
| 2697 | u_int16_t csum; | |||
| 2698 | ||||
| 2699 | offset = ip6_lasthdr(m, 0, IPPROTO_IPV641, &nxt); | |||
| 2700 | if (ISSET(m->m_pkthdr.csum_flags, M_TCP_TSO)((m->M_dat.MH.MH_pkthdr.csum_flags) & (0x8000)) && | |||
| 2701 | in_ifcap_cksum(m, ifp, IFCAP_TSOv60x00002000)) { | |||
| 2702 | csum = in6_cksum_phdr(&ip6->ip6_src, &ip6->ip6_dst, | |||
| 2703 | htonl(0)(__uint32_t)(__builtin_constant_p(0) ? (__uint32_t)(((__uint32_t )(0) & 0xff) << 24 | ((__uint32_t)(0) & 0xff00) << 8 | ((__uint32_t)(0) & 0xff0000) >> 8 | ( (__uint32_t)(0) & 0xff000000) >> 24) : __swap32md(0 )), htonl(nxt)(__uint32_t)(__builtin_constant_p(nxt) ? (__uint32_t)(((__uint32_t )(nxt) & 0xff) << 24 | ((__uint32_t)(nxt) & 0xff00 ) << 8 | ((__uint32_t)(nxt) & 0xff0000) >> 8 | ((__uint32_t)(nxt) & 0xff000000) >> 24) : __swap32md (nxt))); | |||
| 2704 | } else { | |||
| 2705 | csum = in6_cksum_phdr(&ip6->ip6_src, &ip6->ip6_dst, | |||
| 2706 | htonl(m->m_pkthdr.len - offset)(__uint32_t)(__builtin_constant_p(m->M_dat.MH.MH_pkthdr.len - offset) ? (__uint32_t)(((__uint32_t)(m->M_dat.MH.MH_pkthdr .len - offset) & 0xff) << 24 | ((__uint32_t)(m-> M_dat.MH.MH_pkthdr.len - offset) & 0xff00) << 8 | ( (__uint32_t)(m->M_dat.MH.MH_pkthdr.len - offset) & 0xff0000 ) >> 8 | ((__uint32_t)(m->M_dat.MH.MH_pkthdr.len - offset ) & 0xff000000) >> 24) : __swap32md(m->M_dat.MH. MH_pkthdr.len - offset)), htonl(nxt)(__uint32_t)(__builtin_constant_p(nxt) ? (__uint32_t)(((__uint32_t )(nxt) & 0xff) << 24 | ((__uint32_t)(nxt) & 0xff00 ) << 8 | ((__uint32_t)(nxt) & 0xff0000) >> 8 | ((__uint32_t)(nxt) & 0xff000000) >> 24) : __swap32md (nxt))); | |||
| 2707 | } | |||
| 2708 | if (nxt == IPPROTO_TCP6) | |||
| 2709 | offset += offsetof(struct tcphdr, th_sum)__builtin_offsetof(struct tcphdr, th_sum); | |||
| 2710 | else if (nxt == IPPROTO_UDP17) | |||
| 2711 | offset += offsetof(struct udphdr, uh_sum)__builtin_offsetof(struct udphdr, uh_sum); | |||
| 2712 | else if (nxt == IPPROTO_ICMPV658) | |||
| 2713 | offset += offsetof(struct icmp6_hdr, icmp6_cksum)__builtin_offsetof(struct icmp6_hdr, icmp6_cksum); | |||
| 2714 | if ((offset + sizeof(u_int16_t)) > m->m_lenm_hdr.mh_len) | |||
| 2715 | m_copyback(m, offset, sizeof(csum), &csum, M_NOWAIT0x0002); | |||
| 2716 | else | |||
| 2717 | *(u_int16_t *)(mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)) + offset) = csum; | |||
| 2718 | } | |||
| 2719 | ||||
| 2720 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags & M_TCP_CSUM_OUT0x0002) { | |||
| 2721 | if (!ifp || !(ifp->if_capabilitiesif_data.ifi_capabilities & IFCAP_CSUM_TCPv60x00000080) || | |||
| 2722 | ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt != IPPROTO_TCP6 || | |||
| 2723 | ifp->if_bridgeidx != 0) { | |||
| 2724 | tcpstat_inc(tcps_outswcsum); | |||
| 2725 | in6_delayed_cksum(m, IPPROTO_TCP6); | |||
| 2726 | m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags &= ~M_TCP_CSUM_OUT0x0002; /* Clear */ | |||
| 2727 | } | |||
| 2728 | } else if (m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags & M_UDP_CSUM_OUT0x0004) { | |||
| 2729 | if (!ifp || !(ifp->if_capabilitiesif_data.ifi_capabilities & IFCAP_CSUM_UDPv60x00000100) || | |||
| 2730 | ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt != IPPROTO_UDP17 || | |||
| 2731 | ifp->if_bridgeidx != 0) { | |||
| 2732 | udpstat_inc(udps_outswcsum); | |||
| 2733 | in6_delayed_cksum(m, IPPROTO_UDP17); | |||
| 2734 | m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags &= ~M_UDP_CSUM_OUT0x0004; /* Clear */ | |||
| 2735 | } | |||
| 2736 | } else if (m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags & M_ICMP_CSUM_OUT0x0200) { | |||
| 2737 | in6_delayed_cksum(m, IPPROTO_ICMPV658); | |||
| 2738 | m->m_pkthdrM_dat.MH.MH_pkthdr.csum_flags &= ~M_ICMP_CSUM_OUT0x0200; /* Clear */ | |||
| 2739 | } | |||
| 2740 | } | |||
| 2741 | ||||
| 2742 | #ifdef IPSEC1 | |||
| 2743 | int | |||
| 2744 | ip6_output_ipsec_lookup(struct mbuf *m, const u_char seclevel[], | |||
| 2745 | struct tdb **tdbout) | |||
| 2746 | { | |||
| 2747 | struct tdb *tdb; | |||
| 2748 | struct m_tag *mtag; | |||
| 2749 | struct tdb_ident *tdbi; | |||
| 2750 | int error; | |||
| 2751 | ||||
| 2752 | /* | |||
| 2753 | * Check if there was an outgoing SA bound to the flow | |||
| 2754 | * from a transport protocol. | |||
| 2755 | */ | |||
| 2756 | ||||
| 2757 | /* Do we have any pending SAs to apply ? */ | |||
| 2758 | error = ipsp_spd_lookup(m, AF_INET624, sizeof(struct ip6_hdr), | |||
| 2759 | IPSP_DIRECTION_OUT0x2, NULL((void *)0), seclevel, &tdb, NULL((void *)0)); | |||
| 2760 | if (error || tdb == NULL((void *)0)) { | |||
| 2761 | *tdbout = NULL((void *)0); | |||
| 2762 | return error; | |||
| 2763 | } | |||
| 2764 | /* Loop detection */ | |||
| 2765 | for (mtag = m_tag_first(m); mtag != NULL((void *)0); mtag = m_tag_next(m, mtag)) { | |||
| 2766 | if (mtag->m_tag_id != PACKET_TAG_IPSEC_OUT_DONE0x0002) | |||
| 2767 | continue; | |||
| 2768 | tdbi = (struct tdb_ident *)(mtag + 1); | |||
| 2769 | if (tdbi->spi == tdb->tdb_spi && | |||
| 2770 | tdbi->proto == tdb->tdb_sproto && | |||
| 2771 | tdbi->rdomain == tdb->tdb_rdomain && | |||
| 2772 | !memcmp(&tdbi->dst, &tdb->tdb_dst,__builtin_memcmp((&tdbi->dst), (&tdb->tdb_dst), (sizeof(union sockaddr_union))) | |||
| 2773 | sizeof(union sockaddr_union))__builtin_memcmp((&tdbi->dst), (&tdb->tdb_dst), (sizeof(union sockaddr_union)))) { | |||
| 2774 | /* no IPsec needed */ | |||
| 2775 | tdb_unref(tdb); | |||
| 2776 | *tdbout = NULL((void *)0); | |||
| 2777 | return 0; | |||
| 2778 | } | |||
| 2779 | } | |||
| 2780 | *tdbout = tdb; | |||
| 2781 | return 0; | |||
| 2782 | } | |||
| 2783 | ||||
| 2784 | int | |||
| 2785 | ip6_output_ipsec_pmtu_update(struct tdb *tdb, struct route_in6 *ro, | |||
| 2786 | struct in6_addr *dst, int ifidx, int rtableid, int transportmode) | |||
| 2787 | { | |||
| 2788 | struct rtentry *rt = NULL((void *)0); | |||
| 2789 | int rt_mtucloned = 0; | |||
| 2790 | ||||
| 2791 | /* Find a host route to store the mtu in */ | |||
| 2792 | if (ro != NULL((void *)0)) | |||
| 2793 | rt = ro->ro_rt; | |||
| 2794 | /* but don't add a PMTU route for transport mode SAs */ | |||
| 2795 | if (transportmode) | |||
| 2796 | rt = NULL((void *)0); | |||
| 2797 | else if (rt == NULL((void *)0) || (rt->rt_flags & RTF_HOST0x4) == 0) { | |||
| 2798 | struct sockaddr_in6 sin6; | |||
| 2799 | int error; | |||
| 2800 | ||||
| 2801 | memset(&sin6, 0, sizeof(sin6))__builtin_memset((&sin6), (0), (sizeof(sin6))); | |||
| 2802 | sin6.sin6_family = AF_INET624; | |||
| 2803 | sin6.sin6_len = sizeof(sin6); | |||
| 2804 | sin6.sin6_addr = *dst; | |||
| 2805 | sin6.sin6_scope_id = in6_addr2scopeid(ifidx, dst); | |||
| 2806 | error = in6_embedscope(dst, &sin6, NULL((void *)0), NULL((void *)0)); | |||
| 2807 | if (error) { | |||
| 2808 | /* should be impossible */ | |||
| 2809 | return error; | |||
| 2810 | } | |||
| 2811 | rt = icmp6_mtudisc_clone(&sin6, rtableid, 1); | |||
| 2812 | rt_mtucloned = 1; | |||
| 2813 | } | |||
| 2814 | DPRINTF("spi %08x mtu %d rt %p cloned %d",do { } while (0) | |||
| 2815 | ntohl(tdb->tdb_spi), tdb->tdb_mtu, rt, rt_mtucloned)do { } while (0); | |||
| 2816 | if (rt != NULL((void *)0)) { | |||
| 2817 | rt->rt_mturt_rmx.rmx_mtu = tdb->tdb_mtu; | |||
| 2818 | if (ro != NULL((void *)0) && ro->ro_rt != NULL((void *)0)) { | |||
| 2819 | rtfree(ro->ro_rt); | |||
| 2820 | ro->ro_rt = rtalloc(sin6tosa(&ro->ro_dst), RT_RESOLVE1, | |||
| 2821 | rtableid); | |||
| 2822 | } | |||
| 2823 | if (rt_mtucloned) | |||
| 2824 | rtfree(rt); | |||
| 2825 | } | |||
| 2826 | return 0; | |||
| 2827 | } | |||
| 2828 | ||||
| 2829 | int | |||
| 2830 | ip6_output_ipsec_send(struct tdb *tdb, struct mbuf *m, struct route_in6 *ro, | |||
| 2831 | int tunalready, int fwd) | |||
| 2832 | { | |||
| 2833 | struct mbuf_list ml; | |||
| 2834 | struct ifnet *encif = NULL((void *)0); | |||
| 2835 | struct ip6_hdr *ip6; | |||
| 2836 | struct in6_addr dst; | |||
| 2837 | u_int len; | |||
| 2838 | int error, ifidx, rtableid, tso = 0; | |||
| ||||
| 2839 | ||||
| 2840 | #if NPF1 > 0 | |||
| 2841 | /* | |||
| 2842 | * Packet filter | |||
| 2843 | */ | |||
| 2844 | if ((encif = enc_getif(tdb->tdb_rdomain, tdb->tdb_tap)) == NULL((void *)0) || | |||
| 2845 | pf_test(AF_INET624, fwd ? PF_FWD : PF_OUT, encif, &m) != PF_PASS) { | |||
| 2846 | m_freem(m); | |||
| 2847 | return EACCES13; | |||
| 2848 | } | |||
| 2849 | if (m == NULL((void *)0)) | |||
| 2850 | return 0; | |||
| 2851 | /* | |||
| 2852 | * PF_TAG_REROUTE handling or not... | |||
| 2853 | * Packet is entering IPsec so the routing is | |||
| 2854 | * already overruled by the IPsec policy. | |||
| 2855 | * Until now the change was not reconsidered. | |||
| 2856 | * What's the behaviour? | |||
| 2857 | */ | |||
| 2858 | #endif | |||
| 2859 | ||||
| 2860 | /* Check if we can chop the TCP packet */ | |||
| 2861 | ip6 = mtod(m, struct ip6_hdr *)((struct ip6_hdr *)((m)->m_hdr.mh_data)); | |||
| 2862 | if (ISSET(m->m_pkthdr.csum_flags, M_TCP_TSO)((m->M_dat.MH.MH_pkthdr.csum_flags) & (0x8000)) && | |||
| 2863 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_mss <= tdb->tdb_mtu) { | |||
| 2864 | tso = 1; | |||
| 2865 | len = m->m_pkthdrM_dat.MH.MH_pkthdr.ph_mss; | |||
| 2866 | } else | |||
| 2867 | len = sizeof(struct ip6_hdr) + ntohs(ip6->ip6_plen)(__uint16_t)(__builtin_constant_p(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen ) ? (__uint16_t)(((__uint16_t)(ip6->ip6_ctlun.ip6_un1.ip6_un1_plen ) & 0xffU) << 8 | ((__uint16_t)(ip6->ip6_ctlun.ip6_un1 .ip6_un1_plen) & 0xff00U) >> 8) : __swap16md(ip6-> ip6_ctlun.ip6_un1.ip6_un1_plen)); | |||
| 2868 | ||||
| 2869 | /* Check if we are allowed to fragment */ | |||
| 2870 | dst = ip6->ip6_dst; | |||
| 2871 | ifidx = m->m_pkthdrM_dat.MH.MH_pkthdr.ph_ifidx; | |||
| 2872 | rtableid = m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid; | |||
| 2873 | if (ip_mtudisc && tdb->tdb_mtu && | |||
| 2874 | len > tdb->tdb_mtu && tdb->tdb_mtutimeout > gettime()) { | |||
| 2875 | int transportmode; | |||
| 2876 | ||||
| 2877 | transportmode = (tdb->tdb_dst.sa.sa_family == AF_INET624) && | |||
| 2878 | (IN6_ARE_ADDR_EQUAL(&tdb->tdb_dst.sin6.sin6_addr, &dst)(__builtin_memcmp((&(&tdb->tdb_dst.sin6.sin6_addr) ->__u6_addr.__u6_addr8[0]), (&(&dst)->__u6_addr .__u6_addr8[0]), (sizeof(struct in6_addr))) == 0)); | |||
| 2879 | error = ip6_output_ipsec_pmtu_update(tdb, ro, &dst, ifidx, | |||
| 2880 | rtableid, transportmode); | |||
| 2881 | if (error) { | |||
| 2882 | ipsecstat_inc(ipsec_odrops); | |||
| 2883 | tdbstat_inc(tdb, tdb_odrops); | |||
| 2884 | m_freem(m); | |||
| 2885 | return error; | |||
| 2886 | } | |||
| 2887 | ipsec_adjust_mtu(m, tdb->tdb_mtu); | |||
| 2888 | m_freem(m); | |||
| 2889 | return EMSGSIZE40; | |||
| 2890 | } | |||
| 2891 | /* propagate don't fragment for v6-over-v6 */ | |||
| 2892 | if (ip_mtudisc
| |||
| 2893 | SET(m->m_pkthdr.csum_flags, M_IPV6_DF_OUT)((m->M_dat.MH.MH_pkthdr.csum_flags) |= (0x1000)); | |||
| 2894 | ||||
| 2895 | /* | |||
| 2896 | * Clear these -- they'll be set in the recursive invocation | |||
| 2897 | * as needed. | |||
| 2898 | */ | |||
| 2899 | m->m_flagsm_hdr.mh_flags &= ~(M_BCAST0x0100 | M_MCAST0x0200); | |||
| 2900 | ||||
| 2901 | if (tso
| |||
| 2902 | error = tcp_chopper(m, &ml, encif, len); | |||
| 2903 | if (error) | |||
| 2904 | goto done; | |||
| 2905 | } else { | |||
| 2906 | CLR(m->m_pkthdr.csum_flags, M_TCP_TSO)((m->M_dat.MH.MH_pkthdr.csum_flags) &= ~(0x8000)); | |||
| 2907 | in6_proto_cksum_out(m, encif); | |||
| 2908 | ml_init(&ml); | |||
| 2909 | ml_enqueue(&ml, m); | |||
| 2910 | } | |||
| 2911 | ||||
| 2912 | KERNEL_LOCK()_kernel_lock(); | |||
| 2913 | while ((m = ml_dequeue(&ml)) != NULL((void *)0)) { | |||
| 2914 | /* Callee frees mbuf */ | |||
| 2915 | error = ipsp_process_packet(m, tdb, AF_INET624, tunalready); | |||
| 2916 | if (error) | |||
| 2917 | break; | |||
| 2918 | } | |||
| 2919 | KERNEL_UNLOCK()_kernel_unlock(); | |||
| 2920 | done: | |||
| 2921 | if (error) { | |||
| ||||
| 2922 | ml_purge(&ml); | |||
| 2923 | ipsecstat_inc(ipsec_odrops); | |||
| 2924 | tdbstat_inc(tdb, tdb_odrops); | |||
| 2925 | } | |||
| 2926 | if (!error && tso) | |||
| 2927 | tcpstat_inc(tcps_outswtso); | |||
| 2928 | if (ip_mtudisc && error == EMSGSIZE40) | |||
| 2929 | ip6_output_ipsec_pmtu_update(tdb, ro, &dst, ifidx, rtableid, 0); | |||
| 2930 | return error; | |||
| 2931 | } | |||
| 2932 | #endif /* IPSEC */ |