| File: | netinet/ip_input.c |
| Warning: | line 1838, column 4 Value stored to 'mp' is never read |
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| 1 | /* $OpenBSD: ip_input.c,v 1.387 2023/09/16 09:33:27 mpi Exp $ */ |
| 2 | /* $NetBSD: ip_input.c,v 1.30 1996/03/16 23:53:58 christos Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (c) 1982, 1986, 1988, 1993 |
| 6 | * The Regents of the University of California. 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 University 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 REGENTS 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 REGENTS 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 | * @(#)ip_input.c 8.2 (Berkeley) 1/4/94 |
| 33 | */ |
| 34 | |
| 35 | #include "pf.h" |
| 36 | #include "carp.h" |
| 37 | |
| 38 | #include <sys/param.h> |
| 39 | #include <sys/systm.h> |
| 40 | #include <sys/mbuf.h> |
| 41 | #include <sys/domain.h> |
| 42 | #include <sys/mutex.h> |
| 43 | #include <sys/protosw.h> |
| 44 | #include <sys/socket.h> |
| 45 | #include <sys/socketvar.h> |
| 46 | #include <sys/sysctl.h> |
| 47 | #include <sys/pool.h> |
| 48 | #include <sys/task.h> |
| 49 | |
| 50 | #include <net/if.h> |
| 51 | #include <net/if_var.h> |
| 52 | #include <net/if_dl.h> |
| 53 | #include <net/route.h> |
| 54 | #include <net/netisr.h> |
| 55 | |
| 56 | #include <netinet/in.h> |
| 57 | #include <netinet/in_systm.h> |
| 58 | #include <netinet/if_ether.h> |
| 59 | #include <netinet/ip.h> |
| 60 | #include <netinet/in_pcb.h> |
| 61 | #include <netinet/in_var.h> |
| 62 | #include <netinet/ip_var.h> |
| 63 | #include <netinet/ip_icmp.h> |
| 64 | #include <net/if_types.h> |
| 65 | |
| 66 | #ifdef INET61 |
| 67 | #include <netinet6/ip6_var.h> |
| 68 | #endif |
| 69 | |
| 70 | #if NPF1 > 0 |
| 71 | #include <net/pfvar.h> |
| 72 | #endif |
| 73 | |
| 74 | #ifdef MROUTING1 |
| 75 | #include <netinet/ip_mroute.h> |
| 76 | #endif |
| 77 | |
| 78 | #ifdef IPSEC1 |
| 79 | #include <netinet/ip_ipsp.h> |
| 80 | #endif /* IPSEC */ |
| 81 | |
| 82 | #if NCARP1 > 0 |
| 83 | #include <netinet/ip_carp.h> |
| 84 | #endif |
| 85 | |
| 86 | /* values controllable via sysctl */ |
| 87 | int ipforwarding = 0; |
| 88 | int ipmforwarding = 0; |
| 89 | int ipmultipath = 0; |
| 90 | int ipsendredirects = 1; |
| 91 | int ip_dosourceroute = 0; |
| 92 | int ip_defttl = IPDEFTTL64; |
| 93 | int ip_mtudisc = 1; |
| 94 | int ip_mtudisc_timeout = IPMTUDISCTIMEOUT(10 * 60); |
| 95 | int ip_directedbcast = 0; |
| 96 | |
| 97 | /* Protects `ipq' and `ip_frags'. */ |
| 98 | struct mutex ipq_mutex = MUTEX_INITIALIZER(IPL_SOFTNET){ ((void *)0), ((((0x2)) > 0x0 && ((0x2)) < 0x9 ) ? 0x9 : ((0x2))), 0x0 }; |
| 99 | |
| 100 | /* IP reassembly queue */ |
| 101 | LIST_HEAD(, ipq)struct { struct ipq *lh_first; } ipq; |
| 102 | |
| 103 | /* Keep track of memory used for reassembly */ |
| 104 | int ip_maxqueue = 300; |
| 105 | int ip_frags = 0; |
| 106 | |
| 107 | const struct sysctl_bounded_args ipctl_vars[] = { |
| 108 | #ifdef MROUTING1 |
| 109 | { IPCTL_MRTPROTO34, &ip_mrtproto, SYSCTL_INT_READONLY1,0 }, |
| 110 | #endif |
| 111 | { IPCTL_FORWARDING1, &ipforwarding, 0, 2 }, |
| 112 | { IPCTL_SENDREDIRECTS2, &ipsendredirects, 0, 1 }, |
| 113 | { IPCTL_DEFTTL3, &ip_defttl, 0, 255 }, |
| 114 | { IPCTL_DIRECTEDBCAST6, &ip_directedbcast, 0, 1 }, |
| 115 | { IPCTL_IPPORT_FIRSTAUTO7, &ipport_firstauto, 0, 65535 }, |
| 116 | { IPCTL_IPPORT_LASTAUTO8, &ipport_lastauto, 0, 65535 }, |
| 117 | { IPCTL_IPPORT_HIFIRSTAUTO9, &ipport_hifirstauto, 0, 65535 }, |
| 118 | { IPCTL_IPPORT_HILASTAUTO10, &ipport_hilastauto, 0, 65535 }, |
| 119 | { IPCTL_IPPORT_MAXQUEUE11, &ip_maxqueue, 0, 10000 }, |
| 120 | { IPCTL_MFORWARDING31, &ipmforwarding, 0, 1 }, |
| 121 | { IPCTL_MULTIPATH32, &ipmultipath, 0, 1 }, |
| 122 | { IPCTL_ARPTIMEOUT39, &arpt_keep, 0, INT_MAX0x7fffffff }, |
| 123 | { IPCTL_ARPDOWN40, &arpt_down, 0, INT_MAX0x7fffffff }, |
| 124 | }; |
| 125 | |
| 126 | struct niqueue ipintrq = NIQUEUE_INITIALIZER(IPQ_MAXLEN, NETISR_IP){ { { ((void *)0), ((((0x4)) > 0x0 && ((0x4)) < 0x9) ? 0x9 : ((0x4))), 0x0 }, { ((void *)0), ((void *)0), 0 } , ((2048)), 0 }, (2) }; |
| 127 | |
| 128 | struct pool ipqent_pool; |
| 129 | struct pool ipq_pool; |
| 130 | |
| 131 | struct cpumem *ipcounters; |
| 132 | |
| 133 | int ip_sysctl_ipstat(void *, size_t *, void *); |
| 134 | |
| 135 | static struct mbuf_queue ipsend_mq; |
| 136 | static struct mbuf_queue ipsendraw_mq; |
| 137 | |
| 138 | extern struct niqueue arpinq; |
| 139 | |
| 140 | int ip_ours(struct mbuf **, int *, int, int); |
| 141 | int ip_dooptions(struct mbuf *, struct ifnet *); |
| 142 | int in_ouraddr(struct mbuf *, struct ifnet *, struct rtentry **); |
| 143 | |
| 144 | int ip_fragcheck(struct mbuf **, int *); |
| 145 | struct mbuf * ip_reass(struct ipqent *, struct ipq *); |
| 146 | void ip_freef(struct ipq *); |
| 147 | void ip_flush(void); |
| 148 | |
| 149 | static void ip_send_dispatch(void *); |
| 150 | static void ip_sendraw_dispatch(void *); |
| 151 | static struct task ipsend_task = TASK_INITIALIZER(ip_send_dispatch, &ipsend_mq){{ ((void *)0), ((void *)0) }, (ip_send_dispatch), (&ipsend_mq ), 0 }; |
| 152 | static struct task ipsendraw_task = |
| 153 | TASK_INITIALIZER(ip_sendraw_dispatch, &ipsendraw_mq){{ ((void *)0), ((void *)0) }, (ip_sendraw_dispatch), (&ipsendraw_mq ), 0 }; |
| 154 | |
| 155 | /* |
| 156 | * Used to save the IP options in case a protocol wants to respond |
| 157 | * to an incoming packet over the same route if the packet got here |
| 158 | * using IP source routing. This allows connection establishment and |
| 159 | * maintenance when the remote end is on a network that is not known |
| 160 | * to us. |
| 161 | */ |
| 162 | struct ip_srcrt { |
| 163 | int isr_nhops; /* number of hops */ |
| 164 | struct in_addr isr_dst; /* final destination */ |
| 165 | char isr_nop; /* one NOP to align */ |
| 166 | char isr_hdr[IPOPT_OFFSET2 + 1]; /* OPTVAL, OLEN & OFFSET */ |
| 167 | struct in_addr isr_routes[MAX_IPOPTLEN40/sizeof(struct in_addr)]; |
| 168 | }; |
| 169 | |
| 170 | void save_rte(struct mbuf *, u_char *, struct in_addr); |
| 171 | |
| 172 | /* |
| 173 | * IP initialization: fill in IP protocol switch table. |
| 174 | * All protocols not implemented in kernel go to raw IP protocol handler. |
| 175 | */ |
| 176 | void |
| 177 | ip_init(void) |
| 178 | { |
| 179 | const struct protosw *pr; |
| 180 | int i; |
| 181 | const u_int16_t defbaddynamicports_tcp[] = DEFBADDYNAMICPORTS_TCP{ 587, 749, 750, 751, 853, 871, 2049, 6000, 6001, 6002, 6003, 6004, 6005, 6006, 6007, 6008, 6009, 6010, 0 }; |
| 182 | const u_int16_t defbaddynamicports_udp[] = DEFBADDYNAMICPORTS_UDP{ 623, 664, 749, 750, 751, 2049, 3784, 3785, 7784, 0 }; |
| 183 | const u_int16_t defrootonlyports_tcp[] = DEFROOTONLYPORTS_TCP{ 2049, 0 }; |
| 184 | const u_int16_t defrootonlyports_udp[] = DEFROOTONLYPORTS_UDP{ 2049, 0 }; |
| 185 | |
| 186 | ipcounters = counters_alloc(ips_ncounters); |
| 187 | |
| 188 | pool_init(&ipqent_pool, sizeof(struct ipqent), 0, |
| 189 | IPL_SOFTNET0x2, 0, "ipqe", NULL((void *)0)); |
| 190 | pool_init(&ipq_pool, sizeof(struct ipq), 0, |
| 191 | IPL_SOFTNET0x2, 0, "ipq", NULL((void *)0)); |
| 192 | |
| 193 | pr = pffindproto(PF_INET2, IPPROTO_RAW255, SOCK_RAW3); |
| 194 | if (pr == NULL((void *)0)) |
| 195 | panic("ip_init"); |
| 196 | for (i = 0; i < IPPROTO_MAX256; i++) |
| 197 | ip_protox[i] = pr - inetsw; |
| 198 | for (pr = inetdomain.dom_protosw; |
| 199 | pr < inetdomain.dom_protoswNPROTOSW; pr++) |
| 200 | if (pr->pr_domain->dom_family == PF_INET2 && |
| 201 | pr->pr_protocol && pr->pr_protocol != IPPROTO_RAW255 && |
| 202 | pr->pr_protocol < IPPROTO_MAX256) |
| 203 | ip_protox[pr->pr_protocol] = pr - inetsw; |
| 204 | LIST_INIT(&ipq)do { ((&ipq)->lh_first) = ((void *)0); } while (0); |
| 205 | |
| 206 | /* Fill in list of ports not to allocate dynamically. */ |
| 207 | memset(&baddynamicports, 0, sizeof(baddynamicports))__builtin_memset((&baddynamicports), (0), (sizeof(baddynamicports ))); |
| 208 | for (i = 0; defbaddynamicports_tcp[i] != 0; i++) |
| 209 | DP_SET(baddynamicports.tcp, defbaddynamicports_tcp[i])((baddynamicports.tcp)[(defbaddynamicports_tcp[i]) / (sizeof( u_int32_t) * 8)] |= (1U << ((defbaddynamicports_tcp[i]) % (sizeof(u_int32_t) * 8)))); |
| 210 | for (i = 0; defbaddynamicports_udp[i] != 0; i++) |
| 211 | DP_SET(baddynamicports.udp, defbaddynamicports_udp[i])((baddynamicports.udp)[(defbaddynamicports_udp[i]) / (sizeof( u_int32_t) * 8)] |= (1U << ((defbaddynamicports_udp[i]) % (sizeof(u_int32_t) * 8)))); |
| 212 | |
| 213 | /* Fill in list of ports only root can bind to. */ |
| 214 | memset(&rootonlyports, 0, sizeof(rootonlyports))__builtin_memset((&rootonlyports), (0), (sizeof(rootonlyports ))); |
| 215 | for (i = 0; defrootonlyports_tcp[i] != 0; i++) |
| 216 | DP_SET(rootonlyports.tcp, defrootonlyports_tcp[i])((rootonlyports.tcp)[(defrootonlyports_tcp[i]) / (sizeof(u_int32_t ) * 8)] |= (1U << ((defrootonlyports_tcp[i]) % (sizeof( u_int32_t) * 8)))); |
| 217 | for (i = 0; defrootonlyports_udp[i] != 0; i++) |
| 218 | DP_SET(rootonlyports.udp, defrootonlyports_udp[i])((rootonlyports.udp)[(defrootonlyports_udp[i]) / (sizeof(u_int32_t ) * 8)] |= (1U << ((defrootonlyports_udp[i]) % (sizeof( u_int32_t) * 8)))); |
| 219 | |
| 220 | mq_init(&ipsend_mq, 64, IPL_SOFTNET0x2); |
| 221 | mq_init(&ipsendraw_mq, 64, IPL_SOFTNET0x2); |
| 222 | |
| 223 | arpinit(); |
| 224 | #ifdef IPSEC1 |
| 225 | ipsec_init(); |
| 226 | #endif |
| 227 | #ifdef MROUTING1 |
| 228 | rt_timer_queue_init(&ip_mrouterq, MCAST_EXPIRE_FREQUENCY30, |
| 229 | &mfc_expire_route); |
| 230 | #endif |
| 231 | } |
| 232 | |
| 233 | /* |
| 234 | * Enqueue packet for local delivery. Queuing is used as a boundary |
| 235 | * between the network layer (input/forward path) running with |
| 236 | * NET_LOCK_SHARED() and the transport layer needing it exclusively. |
| 237 | */ |
| 238 | int |
| 239 | ip_ours(struct mbuf **mp, int *offp, int nxt, int af) |
| 240 | { |
| 241 | nxt = ip_fragcheck(mp, offp); |
| 242 | if (nxt == IPPROTO_DONE257) |
| 243 | return IPPROTO_DONE257; |
| 244 | |
| 245 | /* We are already in a IPv4/IPv6 local deliver loop. */ |
| 246 | if (af != AF_UNSPEC0) |
| 247 | return nxt; |
| 248 | |
| 249 | niq_enqueue(&ipintrq, *mp); |
| 250 | *mp = NULL((void *)0); |
| 251 | return IPPROTO_DONE257; |
| 252 | } |
| 253 | |
| 254 | /* |
| 255 | * Dequeue and process locally delivered packets. |
| 256 | * This is called with exclusive NET_LOCK(). |
| 257 | */ |
| 258 | void |
| 259 | ipintr(void) |
| 260 | { |
| 261 | struct mbuf *m; |
| 262 | |
| 263 | while ((m = niq_dequeue(&ipintrq)mq_dequeue(&(&ipintrq)->ni_q)) != NULL((void *)0)) { |
| 264 | struct ip *ip; |
| 265 | int off, nxt; |
| 266 | |
| 267 | #ifdef DIAGNOSTIC1 |
| 268 | if ((m->m_flagsm_hdr.mh_flags & M_PKTHDR0x0002) == 0) |
| 269 | panic("ipintr no HDR"); |
| 270 | #endif |
| 271 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 272 | off = ip->ip_hl << 2; |
| 273 | nxt = ip->ip_p; |
| 274 | |
| 275 | nxt = ip_deliver(&m, &off, nxt, AF_INET2); |
| 276 | KASSERT(nxt == IPPROTO_DONE)((nxt == 257) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/netinet/ip_input.c" , 276, "nxt == IPPROTO_DONE")); |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | /* |
| 281 | * IPv4 input routine. |
| 282 | * |
| 283 | * Checksum and byte swap header. Process options. Forward or deliver. |
| 284 | */ |
| 285 | void |
| 286 | ipv4_input(struct ifnet *ifp, struct mbuf *m) |
| 287 | { |
| 288 | int off, nxt; |
| 289 | |
| 290 | off = 0; |
| 291 | nxt = ip_input_if(&m, &off, IPPROTO_IPV44, AF_UNSPEC0, ifp); |
| 292 | KASSERT(nxt == IPPROTO_DONE)((nxt == 257) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/netinet/ip_input.c" , 292, "nxt == IPPROTO_DONE")); |
| 293 | } |
| 294 | |
| 295 | struct mbuf * |
| 296 | ipv4_check(struct ifnet *ifp, struct mbuf *m) |
| 297 | { |
| 298 | struct ip *ip; |
| 299 | int hlen, len; |
| 300 | |
| 301 | if (m->m_lenm_hdr.mh_len < sizeof(*ip)) { |
| 302 | m = m_pullup(m, sizeof(*ip)); |
| 303 | if (m == NULL((void *)0)) { |
| 304 | ipstat_inc(ips_toosmall); |
| 305 | return (NULL((void *)0)); |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 310 | if (ip->ip_v != IPVERSION4) { |
| 311 | ipstat_inc(ips_badvers); |
| 312 | goto bad; |
| 313 | } |
| 314 | |
| 315 | hlen = ip->ip_hl << 2; |
| 316 | if (hlen < sizeof(*ip)) { /* minimum header length */ |
| 317 | ipstat_inc(ips_badhlen); |
| 318 | goto bad; |
| 319 | } |
| 320 | if (hlen > m->m_lenm_hdr.mh_len) { |
| 321 | m = m_pullup(m, hlen); |
| 322 | if (m == NULL((void *)0)) { |
| 323 | ipstat_inc(ips_badhlen); |
| 324 | return (NULL((void *)0)); |
| 325 | } |
| 326 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 327 | } |
| 328 | |
| 329 | /* 127/8 must not appear on wire - RFC1122 */ |
| 330 | if ((ntohl(ip->ip_dst.s_addr)(__uint32_t)(__builtin_constant_p(ip->ip_dst.s_addr) ? (__uint32_t )(((__uint32_t)(ip->ip_dst.s_addr) & 0xff) << 24 | ((__uint32_t)(ip->ip_dst.s_addr) & 0xff00) << 8 | ((__uint32_t)(ip->ip_dst.s_addr) & 0xff0000) >> 8 | ((__uint32_t)(ip->ip_dst.s_addr) & 0xff000000) >> 24) : __swap32md(ip->ip_dst.s_addr)) >> IN_CLASSA_NSHIFT24) == IN_LOOPBACKNET127 || |
| 331 | (ntohl(ip->ip_src.s_addr)(__uint32_t)(__builtin_constant_p(ip->ip_src.s_addr) ? (__uint32_t )(((__uint32_t)(ip->ip_src.s_addr) & 0xff) << 24 | ((__uint32_t)(ip->ip_src.s_addr) & 0xff00) << 8 | ((__uint32_t)(ip->ip_src.s_addr) & 0xff0000) >> 8 | ((__uint32_t)(ip->ip_src.s_addr) & 0xff000000) >> 24) : __swap32md(ip->ip_src.s_addr)) >> IN_CLASSA_NSHIFT24) == IN_LOOPBACKNET127) { |
| 332 | if ((ifp->if_flags & IFF_LOOPBACK0x8) == 0) { |
| 333 | ipstat_inc(ips_badaddr); |
| 334 | goto bad; |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | if (!ISSET(m->m_pkthdr.csum_flags, M_IPV4_CSUM_IN_OK)((m->M_dat.MH.MH_pkthdr.csum_flags) & (0x0008))) { |
| 339 | if (ISSET(m->m_pkthdr.csum_flags, M_IPV4_CSUM_IN_BAD)((m->M_dat.MH.MH_pkthdr.csum_flags) & (0x0010))) { |
| 340 | ipstat_inc(ips_badsum); |
| 341 | goto bad; |
| 342 | } |
| 343 | |
| 344 | ipstat_inc(ips_inswcsum); |
| 345 | if (in_cksum(m, hlen) != 0) { |
| 346 | ipstat_inc(ips_badsum); |
| 347 | goto bad; |
| 348 | } |
| 349 | |
| 350 | SET(m->m_pkthdr.csum_flags, M_IPV4_CSUM_IN_OK)((m->M_dat.MH.MH_pkthdr.csum_flags) |= (0x0008)); |
| 351 | } |
| 352 | |
| 353 | /* Retrieve the packet length. */ |
| 354 | len = ntohs(ip->ip_len)(__uint16_t)(__builtin_constant_p(ip->ip_len) ? (__uint16_t )(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip-> ip_len)); |
| 355 | |
| 356 | /* |
| 357 | * Convert fields to host representation. |
| 358 | */ |
| 359 | if (len < hlen) { |
| 360 | ipstat_inc(ips_badlen); |
| 361 | goto bad; |
| 362 | } |
| 363 | |
| 364 | /* |
| 365 | * Check that the amount of data in the buffers |
| 366 | * is at least as much as the IP header would have us expect. |
| 367 | * Trim mbufs if longer than we expect. |
| 368 | * Drop packet if shorter than we expect. |
| 369 | */ |
| 370 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.len < len) { |
| 371 | ipstat_inc(ips_tooshort); |
| 372 | goto bad; |
| 373 | } |
| 374 | if (m->m_pkthdrM_dat.MH.MH_pkthdr.len > len) { |
| 375 | if (m->m_lenm_hdr.mh_len == m->m_pkthdrM_dat.MH.MH_pkthdr.len) { |
| 376 | m->m_lenm_hdr.mh_len = len; |
| 377 | m->m_pkthdrM_dat.MH.MH_pkthdr.len = len; |
| 378 | } else |
| 379 | m_adj(m, len - m->m_pkthdrM_dat.MH.MH_pkthdr.len); |
| 380 | } |
| 381 | |
| 382 | return (m); |
| 383 | bad: |
| 384 | m_freem(m); |
| 385 | return (NULL((void *)0)); |
| 386 | } |
| 387 | |
| 388 | int |
| 389 | ip_input_if(struct mbuf **mp, int *offp, int nxt, int af, struct ifnet *ifp) |
| 390 | { |
| 391 | struct mbuf *m; |
| 392 | struct rtentry *rt = NULL((void *)0); |
| 393 | struct ip *ip; |
| 394 | int hlen; |
| 395 | in_addr_t pfrdr = 0; |
| 396 | |
| 397 | KASSERT(*offp == 0)((*offp == 0) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/netinet/ip_input.c" , 397, "*offp == 0")); |
| 398 | |
| 399 | ipstat_inc(ips_total); |
| 400 | m = *mp = ipv4_check(ifp, *mp); |
| 401 | if (m == NULL((void *)0)) |
| 402 | goto bad; |
| 403 | |
| 404 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 405 | |
| 406 | #if NCARP1 > 0 |
| 407 | if (carp_lsdrop(ifp, m, AF_INET2, &ip->ip_src.s_addr, |
| 408 | &ip->ip_dst.s_addr, (ip->ip_p == IPPROTO_ICMP1 ? 0 : 1))) |
| 409 | goto bad; |
| 410 | #endif |
| 411 | |
| 412 | #if NPF1 > 0 |
| 413 | /* |
| 414 | * Packet filter |
| 415 | */ |
| 416 | pfrdr = ip->ip_dst.s_addr; |
| 417 | if (pf_test(AF_INET2, PF_IN, ifp, mp) != PF_PASS) |
| 418 | goto bad; |
| 419 | m = *mp; |
| 420 | if (m == NULL((void *)0)) |
| 421 | goto bad; |
| 422 | |
| 423 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 424 | pfrdr = (pfrdr != ip->ip_dst.s_addr); |
| 425 | #endif |
| 426 | |
| 427 | hlen = ip->ip_hl << 2; |
| 428 | |
| 429 | /* |
| 430 | * Process options and, if not destined for us, |
| 431 | * ship it on. ip_dooptions returns 1 when an |
| 432 | * error was detected (causing an icmp message |
| 433 | * to be sent and the original packet to be freed). |
| 434 | */ |
| 435 | if (hlen > sizeof (struct ip) && ip_dooptions(m, ifp)) { |
| 436 | m = *mp = NULL((void *)0); |
| 437 | goto bad; |
| 438 | } |
| 439 | |
| 440 | if (ip->ip_dst.s_addr == INADDR_BROADCAST((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t)(0xffffffff )) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xffffffff)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xffffffff)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xffffffff)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xffffffff) ) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xffffffff )))) || |
| 441 | ip->ip_dst.s_addr == INADDR_ANY((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t)(0x00000000 )) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000000) ) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000000 ))))) { |
| 442 | nxt = ip_ours(mp, offp, nxt, af); |
| 443 | goto out; |
| 444 | } |
| 445 | |
| 446 | switch(in_ouraddr(m, ifp, &rt)) { |
| 447 | case 2: |
| 448 | goto bad; |
| 449 | case 1: |
| 450 | nxt = ip_ours(mp, offp, nxt, af); |
| 451 | goto out; |
| 452 | } |
| 453 | |
| 454 | if (IN_MULTICAST(ip->ip_dst.s_addr)(((u_int32_t)(ip->ip_dst.s_addr) & ((u_int32_t) (__uint32_t )(__builtin_constant_p((u_int32_t)(0xf0000000)) ? (__uint32_t )(((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xf0000000))))) == ((u_int32_t ) (__uint32_t)(__builtin_constant_p((u_int32_t)(0xe0000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff ) << 24 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff00 ) << 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff0000 ) >> 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff000000 ) >> 24) : __swap32md((u_int32_t)(0xe0000000)))))) { |
| 455 | /* |
| 456 | * Make sure M_MCAST is set. It should theoretically |
| 457 | * already be there, but let's play safe because upper |
| 458 | * layers check for this flag. |
| 459 | */ |
| 460 | m->m_flagsm_hdr.mh_flags |= M_MCAST0x0200; |
| 461 | |
| 462 | #ifdef MROUTING1 |
| 463 | if (ipmforwarding && ip_mrouter[ifp->if_rdomainif_data.ifi_rdomain]) { |
| 464 | int error; |
| 465 | |
| 466 | if (m->m_flagsm_hdr.mh_flags & M_EXT0x0001) { |
| 467 | if ((m = *mp = m_pullup(m, hlen)) == NULL((void *)0)) { |
| 468 | ipstat_inc(ips_toosmall); |
| 469 | goto bad; |
| 470 | } |
| 471 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 472 | } |
| 473 | /* |
| 474 | * If we are acting as a multicast router, all |
| 475 | * incoming multicast packets are passed to the |
| 476 | * kernel-level multicast forwarding function. |
| 477 | * The packet is returned (relatively) intact; if |
| 478 | * ip_mforward() returns a non-zero value, the packet |
| 479 | * must be discarded, else it may be accepted below. |
| 480 | * |
| 481 | * (The IP ident field is put in the same byte order |
| 482 | * as expected when ip_mforward() is called from |
| 483 | * ip_output().) |
| 484 | */ |
| 485 | KERNEL_LOCK()_kernel_lock(); |
| 486 | error = ip_mforward(m, ifp); |
| 487 | KERNEL_UNLOCK()_kernel_unlock(); |
| 488 | if (error) { |
| 489 | ipstat_inc(ips_cantforward); |
| 490 | goto bad; |
| 491 | } |
| 492 | |
| 493 | /* |
| 494 | * The process-level routing daemon needs to receive |
| 495 | * all multicast IGMP packets, whether or not this |
| 496 | * host belongs to their destination groups. |
| 497 | */ |
| 498 | if (ip->ip_p == IPPROTO_IGMP2) { |
| 499 | nxt = ip_ours(mp, offp, nxt, af); |
| 500 | goto out; |
| 501 | } |
| 502 | ipstat_inc(ips_forward); |
| 503 | } |
| 504 | #endif |
| 505 | /* |
| 506 | * See if we belong to the destination multicast group on the |
| 507 | * arrival interface. |
| 508 | */ |
| 509 | if (!in_hasmulti(&ip->ip_dst, ifp)) { |
| 510 | ipstat_inc(ips_notmember); |
| 511 | if (!IN_LOCAL_GROUP(ip->ip_dst.s_addr)(((u_int32_t)(ip->ip_dst.s_addr) & ((u_int32_t) (__uint32_t )(__builtin_constant_p((u_int32_t)(0xffffff00)) ? (__uint32_t )(((__uint32_t)((u_int32_t)(0xffffff00)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xffffff00)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xffffff00)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xffffff00)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xffffff00))))) == ((u_int32_t ) (__uint32_t)(__builtin_constant_p((u_int32_t)(0xe0000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff ) << 24 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff00 ) << 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff0000 ) >> 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff000000 ) >> 24) : __swap32md((u_int32_t)(0xe0000000)))))) |
| 512 | ipstat_inc(ips_cantforward); |
| 513 | goto bad; |
| 514 | } |
| 515 | nxt = ip_ours(mp, offp, nxt, af); |
| 516 | goto out; |
| 517 | } |
| 518 | |
| 519 | #if NCARP1 > 0 |
| 520 | if (ip->ip_p == IPPROTO_ICMP1 && |
| 521 | carp_lsdrop(ifp, m, AF_INET2, &ip->ip_src.s_addr, |
| 522 | &ip->ip_dst.s_addr, 1)) |
| 523 | goto bad; |
| 524 | #endif |
| 525 | /* |
| 526 | * Not for us; forward if possible and desirable. |
| 527 | */ |
| 528 | if (ipforwarding == 0) { |
| 529 | ipstat_inc(ips_cantforward); |
| 530 | goto bad; |
| 531 | } |
| 532 | #ifdef IPSEC1 |
| 533 | if (ipsec_in_use) { |
| 534 | int rv; |
| 535 | |
| 536 | rv = ipsec_forward_check(m, hlen, AF_INET2); |
| 537 | if (rv != 0) { |
| 538 | ipstat_inc(ips_cantforward); |
| 539 | goto bad; |
| 540 | } |
| 541 | /* |
| 542 | * Fall through, forward packet. Outbound IPsec policy |
| 543 | * checking will occur in ip_output(). |
| 544 | */ |
| 545 | } |
| 546 | #endif /* IPSEC */ |
| 547 | |
| 548 | ip_forward(m, ifp, rt, pfrdr); |
| 549 | *mp = NULL((void *)0); |
| 550 | return IPPROTO_DONE257; |
| 551 | bad: |
| 552 | nxt = IPPROTO_DONE257; |
| 553 | m_freemp(mp); |
| 554 | out: |
| 555 | rtfree(rt); |
| 556 | return nxt; |
| 557 | } |
| 558 | |
| 559 | int |
| 560 | ip_fragcheck(struct mbuf **mp, int *offp) |
| 561 | { |
| 562 | struct ip *ip; |
| 563 | struct ipq *fp; |
| 564 | struct ipqent *ipqe; |
| 565 | int hlen; |
| 566 | uint16_t mff; |
| 567 | |
| 568 | ip = mtod(*mp, struct ip *)((struct ip *)((*mp)->m_hdr.mh_data)); |
| 569 | hlen = ip->ip_hl << 2; |
| 570 | |
| 571 | /* |
| 572 | * If offset or more fragments are set, must reassemble. |
| 573 | * Otherwise, nothing need be done. |
| 574 | * (We could look in the reassembly queue to see |
| 575 | * if the packet was previously fragmented, |
| 576 | * but it's not worth the time; just let them time out.) |
| 577 | */ |
| 578 | if (ISSET(ip->ip_off, htons(IP_OFFMASK | IP_MF))((ip->ip_off) & ((__uint16_t)(__builtin_constant_p(0x1fff | 0x2000) ? (__uint16_t)(((__uint16_t)(0x1fff | 0x2000) & 0xffU) << 8 | ((__uint16_t)(0x1fff | 0x2000) & 0xff00U ) >> 8) : __swap16md(0x1fff | 0x2000))))) { |
| 579 | if ((*mp)->m_flagsm_hdr.mh_flags & M_EXT0x0001) { /* XXX */ |
| 580 | if ((*mp = m_pullup(*mp, hlen)) == NULL((void *)0)) { |
| 581 | ipstat_inc(ips_toosmall); |
| 582 | return IPPROTO_DONE257; |
| 583 | } |
| 584 | ip = mtod(*mp, struct ip *)((struct ip *)((*mp)->m_hdr.mh_data)); |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Adjust ip_len to not reflect header, |
| 589 | * set ipqe_mff if more fragments are expected, |
| 590 | * convert offset of this to bytes. |
| 591 | */ |
| 592 | ip->ip_len = htons(ntohs(ip->ip_len) - hlen)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (ip->ip_len) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U ) >> 8) : __swap16md(ip->ip_len)) - hlen) ? (__uint16_t )(((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) - hlen) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) - hlen) & 0xff00U) >> 8 ) : __swap16md((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) - hlen)); |
| 593 | mff = ISSET(ip->ip_off, htons(IP_MF))((ip->ip_off) & ((__uint16_t)(__builtin_constant_p(0x2000 ) ? (__uint16_t)(((__uint16_t)(0x2000) & 0xffU) << 8 | ((__uint16_t)(0x2000) & 0xff00U) >> 8) : __swap16md (0x2000)))); |
| 594 | if (mff) { |
| 595 | /* |
| 596 | * Make sure that fragments have a data length |
| 597 | * that's a non-zero multiple of 8 bytes. |
| 598 | */ |
| 599 | if (ntohs(ip->ip_len)(__uint16_t)(__builtin_constant_p(ip->ip_len) ? (__uint16_t )(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip-> ip_len)) == 0 || |
| 600 | (ntohs(ip->ip_len)(__uint16_t)(__builtin_constant_p(ip->ip_len) ? (__uint16_t )(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip-> ip_len)) & 0x7) != 0) { |
| 601 | ipstat_inc(ips_badfrags); |
| 602 | m_freemp(mp); |
| 603 | return IPPROTO_DONE257; |
| 604 | } |
| 605 | } |
| 606 | ip->ip_off = htons(ntohs(ip->ip_off) << 3)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (ip->ip_off) ? (__uint16_t)(((__uint16_t)(ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ip->ip_off) & 0xff00U ) >> 8) : __swap16md(ip->ip_off)) << 3) ? (__uint16_t )(((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ip->ip_off) & 0xff00U) >> 8) : __swap16md(ip->ip_off)) << 3) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ip->ip_off) & 0xff00U) >> 8) : __swap16md(ip->ip_off)) << 3) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p(ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ip->ip_off) & 0xff00U) >> 8) : __swap16md(ip->ip_off)) << 3)); |
| 607 | |
| 608 | mtx_enter(&ipq_mutex); |
| 609 | |
| 610 | /* |
| 611 | * Look for queue of fragments |
| 612 | * of this datagram. |
| 613 | */ |
| 614 | LIST_FOREACH(fp, &ipq, ipq_q)for((fp) = ((&ipq)->lh_first); (fp)!= ((void *)0); (fp ) = ((fp)->ipq_q.le_next)) { |
| 615 | if (ip->ip_id == fp->ipq_id && |
| 616 | ip->ip_src.s_addr == fp->ipq_src.s_addr && |
| 617 | ip->ip_dst.s_addr == fp->ipq_dst.s_addr && |
| 618 | ip->ip_p == fp->ipq_p) |
| 619 | break; |
| 620 | } |
| 621 | |
| 622 | /* |
| 623 | * If datagram marked as having more fragments |
| 624 | * or if this is not the first fragment, |
| 625 | * attempt reassembly; if it succeeds, proceed. |
| 626 | */ |
| 627 | if (mff || ip->ip_off) { |
| 628 | ipstat_inc(ips_fragments); |
| 629 | if (ip_frags + 1 > ip_maxqueue) { |
| 630 | ip_flush(); |
| 631 | ipstat_inc(ips_rcvmemdrop); |
| 632 | goto bad; |
| 633 | } |
| 634 | |
| 635 | ipqe = pool_get(&ipqent_pool, PR_NOWAIT0x0002); |
| 636 | if (ipqe == NULL((void *)0)) { |
| 637 | ipstat_inc(ips_rcvmemdrop); |
| 638 | goto bad; |
| 639 | } |
| 640 | ip_frags++; |
| 641 | ipqe->ipqe_mff = mff; |
| 642 | ipqe->ipqe_m = *mp; |
| 643 | ipqe->ipqe_ip = ip; |
| 644 | *mp = ip_reass(ipqe, fp); |
| 645 | if (*mp == NULL((void *)0)) |
| 646 | goto bad; |
| 647 | ipstat_inc(ips_reassembled); |
| 648 | ip = mtod(*mp, struct ip *)((struct ip *)((*mp)->m_hdr.mh_data)); |
| 649 | hlen = ip->ip_hl << 2; |
| 650 | ip->ip_len = htons(ntohs(ip->ip_len) + hlen)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (ip->ip_len) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U ) >> 8) : __swap16md(ip->ip_len)) + hlen) ? (__uint16_t )(((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) + hlen) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) + hlen) & 0xff00U) >> 8 ) : __swap16md((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) + hlen)); |
| 651 | } else { |
| 652 | if (fp != NULL((void *)0)) |
| 653 | ip_freef(fp); |
| 654 | } |
| 655 | |
| 656 | mtx_leave(&ipq_mutex); |
| 657 | } |
| 658 | |
| 659 | *offp = hlen; |
| 660 | return ip->ip_p; |
| 661 | |
| 662 | bad: |
| 663 | mtx_leave(&ipq_mutex); |
| 664 | m_freemp(mp); |
| 665 | return IPPROTO_DONE257; |
| 666 | } |
| 667 | |
| 668 | #ifndef INET61 |
| 669 | #define IPSTAT_INC(name) ipstat_inc(ips_##name) |
| 670 | #else |
| 671 | #define IPSTAT_INC(name) (af == AF_INET2 ? \ |
| 672 | ipstat_inc(ips_##name) : ip6stat_inc(ip6s_##name)) |
| 673 | #endif |
| 674 | |
| 675 | int |
| 676 | ip_deliver(struct mbuf **mp, int *offp, int nxt, int af) |
| 677 | { |
| 678 | const struct protosw *psw; |
| 679 | int naf = af; |
| 680 | #ifdef INET61 |
| 681 | int nest = 0; |
| 682 | #endif /* INET6 */ |
| 683 | |
| 684 | NET_ASSERT_LOCKED_EXCLUSIVE()do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s != 0x0001UL)) splassert_fail(0x0001UL, _s, __func__); } while (0); |
| 685 | |
| 686 | /* |
| 687 | * Tell launch routine the next header |
| 688 | */ |
| 689 | IPSTAT_INC(delivered); |
| 690 | |
| 691 | while (nxt != IPPROTO_DONE257) { |
| 692 | #ifdef INET61 |
| 693 | if (af == AF_INET624 && |
| 694 | ip6_hdrnestlimit && (++nest > ip6_hdrnestlimit)) { |
| 695 | ip6stat_inc(ip6s_toomanyhdr); |
| 696 | goto bad; |
| 697 | } |
| 698 | #endif /* INET6 */ |
| 699 | |
| 700 | /* |
| 701 | * protection against faulty packet - there should be |
| 702 | * more sanity checks in header chain processing. |
| 703 | */ |
| 704 | if ((*mp)->m_pkthdrM_dat.MH.MH_pkthdr.len < *offp) { |
| 705 | IPSTAT_INC(tooshort); |
| 706 | goto bad; |
| 707 | } |
| 708 | |
| 709 | #ifdef IPSEC1 |
| 710 | if (ipsec_in_use) { |
| 711 | if (ipsec_local_check(*mp, *offp, nxt, af) != 0) { |
| 712 | IPSTAT_INC(cantforward); |
| 713 | goto bad; |
| 714 | } |
| 715 | } |
| 716 | /* Otherwise, just fall through and deliver the packet */ |
| 717 | #endif /* IPSEC */ |
| 718 | |
| 719 | switch (nxt) { |
| 720 | case IPPROTO_IPV44: |
| 721 | naf = AF_INET2; |
| 722 | ipstat_inc(ips_delivered); |
| 723 | break; |
| 724 | #ifdef INET61 |
| 725 | case IPPROTO_IPV641: |
| 726 | naf = AF_INET624; |
| 727 | ip6stat_inc(ip6s_delivered); |
| 728 | break; |
| 729 | #endif /* INET6 */ |
| 730 | } |
| 731 | switch (af) { |
| 732 | case AF_INET2: |
| 733 | psw = &inetsw[ip_protox[nxt]]; |
| 734 | break; |
| 735 | #ifdef INET61 |
| 736 | case AF_INET624: |
| 737 | psw = &inet6sw[ip6_protox[nxt]]; |
| 738 | break; |
| 739 | #endif /* INET6 */ |
| 740 | } |
| 741 | nxt = (*psw->pr_input)(mp, offp, nxt, af); |
| 742 | af = naf; |
| 743 | } |
| 744 | return nxt; |
| 745 | bad: |
| 746 | m_freemp(mp); |
| 747 | return IPPROTO_DONE257; |
| 748 | } |
| 749 | #undef IPSTAT_INC |
| 750 | |
| 751 | int |
| 752 | in_ouraddr(struct mbuf *m, struct ifnet *ifp, struct rtentry **prt) |
| 753 | { |
| 754 | struct rtentry *rt; |
| 755 | struct ip *ip; |
| 756 | struct sockaddr_in sin; |
| 757 | int match = 0; |
| 758 | |
| 759 | #if NPF1 > 0 |
| 760 | switch (pf_ouraddr(m)) { |
| 761 | case 0: |
| 762 | return (0); |
| 763 | case 1: |
| 764 | return (1); |
| 765 | default: |
| 766 | /* pf does not know it */ |
| 767 | break; |
| 768 | } |
| 769 | #endif |
| 770 | |
| 771 | ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 772 | |
| 773 | memset(&sin, 0, sizeof(sin))__builtin_memset((&sin), (0), (sizeof(sin))); |
| 774 | sin.sin_len = sizeof(sin); |
| 775 | sin.sin_family = AF_INET2; |
| 776 | sin.sin_addr = ip->ip_dst; |
| 777 | rt = rtalloc_mpath(sintosa(&sin), &ip->ip_src.s_addr, |
| 778 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid); |
| 779 | if (rtisvalid(rt)) { |
| 780 | if (ISSET(rt->rt_flags, RTF_LOCAL)((rt->rt_flags) & (0x200000))) |
| 781 | match = 1; |
| 782 | |
| 783 | /* |
| 784 | * If directedbcast is enabled we only consider it local |
| 785 | * if it is received on the interface with that address. |
| 786 | */ |
| 787 | if (ISSET(rt->rt_flags, RTF_BROADCAST)((rt->rt_flags) & (0x400000)) && |
| 788 | (!ip_directedbcast || rt->rt_ifidx == ifp->if_index)) { |
| 789 | match = 1; |
| 790 | |
| 791 | /* Make sure M_BCAST is set */ |
| 792 | m->m_flagsm_hdr.mh_flags |= M_BCAST0x0100; |
| 793 | } |
| 794 | } |
| 795 | *prt = rt; |
| 796 | |
| 797 | if (!match) { |
| 798 | struct ifaddr *ifa; |
| 799 | |
| 800 | /* |
| 801 | * No local address or broadcast address found, so check for |
| 802 | * ancient classful broadcast addresses. |
| 803 | * It must have been broadcast on the link layer, and for an |
| 804 | * address on the interface it was received on. |
| 805 | */ |
| 806 | if (!ISSET(m->m_flags, M_BCAST)((m->m_hdr.mh_flags) & (0x0100)) || |
| 807 | !IN_CLASSFULBROADCAST(ip->ip_dst.s_addr, ip->ip_dst.s_addr)(((((u_int32_t)(ip->ip_dst.s_addr) & ((u_int32_t) (__uint32_t )(__builtin_constant_p((u_int32_t)(0xe0000000)) ? (__uint32_t )(((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xe0000000))))) == ((u_int32_t ) (__uint32_t)(__builtin_constant_p((u_int32_t)(0xc0000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff ) << 24 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff00 ) << 8 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff0000 ) >> 8 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff000000 ) >> 24) : __swap32md((u_int32_t)(0xc0000000))))) && (ip->ip_dst.s_addr | ((u_int32_t) (__uint32_t)(__builtin_constant_p ((u_int32_t)(0x000000ff)) ? (__uint32_t)(((__uint32_t)((u_int32_t )(0x000000ff)) & 0xff) << 24 | ((__uint32_t)((u_int32_t )(0x000000ff)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t )(0x000000ff)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t )(0x000000ff)) & 0xff000000) >> 24) : __swap32md((u_int32_t )(0x000000ff))))) == ip->ip_dst.s_addr) || ((((u_int32_t)( ip->ip_dst.s_addr) & ((u_int32_t) (__uint32_t)(__builtin_constant_p ((u_int32_t)(0xc0000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t )(0xc0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t )(0xc0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t )(0xc0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t )(0xc0000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t )(0xc0000000))))) == ((u_int32_t) (__uint32_t)(__builtin_constant_p ((u_int32_t)(0x80000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t )(0x80000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t )(0x80000000))))) && (ip->ip_dst.s_addr | ((u_int32_t ) (__uint32_t)(__builtin_constant_p((u_int32_t)(0x0000ffff)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff ) << 24 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff00 ) << 8 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff0000 ) >> 8 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff000000 ) >> 24) : __swap32md((u_int32_t)(0x0000ffff))))) == ip ->ip_dst.s_addr) || ((((u_int32_t)(ip->ip_dst.s_addr) & ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t)(0x80000000 )) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x80000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x80000000) ) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x80000000 ))))) == ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t )(0x00000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00000000 )) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00000000 )) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00000000 )) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00000000 )) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00000000 ))))) && (ip->ip_dst.s_addr | ((u_int32_t) (__uint32_t )(__builtin_constant_p((u_int32_t)(0x00ffffff)) ? (__uint32_t )(((__uint32_t)((u_int32_t)(0x00ffffff)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00ffffff)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00ffffff)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00ffffff)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00ffffff))))) == ip-> ip_dst.s_addr))) |
| 808 | return (0); |
| 809 | |
| 810 | if (ifp->if_rdomainif_data.ifi_rdomain != rtable_l2(m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid)) |
| 811 | return (0); |
| 812 | /* |
| 813 | * The check in the loop assumes you only rx a packet on an UP |
| 814 | * interface, and that M_BCAST will only be set on a BROADCAST |
| 815 | * interface. |
| 816 | */ |
| 817 | NET_ASSERT_LOCKED()do { int _s = rw_status(&netlock); if ((splassert_ctl > 0) && (_s != 0x0001UL && _s != 0x0002UL)) splassert_fail (0x0002UL, _s, __func__); } while (0); |
| 818 | TAILQ_FOREACH(ifa, &ifp->if_addrlist, ifa_list)for((ifa) = ((&ifp->if_addrlist)->tqh_first); (ifa) != ((void *)0); (ifa) = ((ifa)->ifa_list.tqe_next)) { |
| 819 | if (ifa->ifa_addr->sa_family != AF_INET2) |
| 820 | continue; |
| 821 | |
| 822 | if (IN_CLASSFULBROADCAST(ip->ip_dst.s_addr,(((((u_int32_t)(ifatoia(ifa)->ia_addr.sin_addr.s_addr) & ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t)(0xe0000000 )) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xe0000000) ) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xe0000000 ))))) == ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t )(0xc0000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xc0000000 ))))) && (ifatoia(ifa)->ia_addr.sin_addr.s_addr | ( (u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t)(0x000000ff )) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ff)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ff)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ff)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ff) ) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ff ))))) == ip->ip_dst.s_addr) || ((((u_int32_t)(ifatoia(ifa) ->ia_addr.sin_addr.s_addr) & ((u_int32_t) (__uint32_t) (__builtin_constant_p((u_int32_t)(0xc0000000)) ? (__uint32_t) (((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xc0000000))))) == ((u_int32_t ) (__uint32_t)(__builtin_constant_p((u_int32_t)(0x80000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x80000000)) & 0xff ) << 24 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff00 ) << 8 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff0000 ) >> 8 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff000000 ) >> 24) : __swap32md((u_int32_t)(0x80000000))))) && (ifatoia(ifa)->ia_addr.sin_addr.s_addr | ((u_int32_t) (__uint32_t )(__builtin_constant_p((u_int32_t)(0x0000ffff)) ? (__uint32_t )(((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x0000ffff))))) == ip-> ip_dst.s_addr) || ((((u_int32_t)(ifatoia(ifa)->ia_addr.sin_addr .s_addr) & ((u_int32_t) (__uint32_t)(__builtin_constant_p ((u_int32_t)(0x80000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t )(0x80000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t )(0x80000000))))) == ((u_int32_t) (__uint32_t)(__builtin_constant_p ((u_int32_t)(0x00000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t )(0x00000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t )(0x00000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t )(0x00000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t )(0x00000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t )(0x00000000))))) && (ifatoia(ifa)->ia_addr.sin_addr .s_addr | ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t )(0x00ffffff)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00ffffff ))))) == ip->ip_dst.s_addr)) |
| 823 | ifatoia(ifa)->ia_addr.sin_addr.s_addr)(((((u_int32_t)(ifatoia(ifa)->ia_addr.sin_addr.s_addr) & ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t)(0xe0000000 )) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xe0000000) ) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xe0000000 ))))) == ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t )(0xc0000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xc0000000 )) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xc0000000 ))))) && (ifatoia(ifa)->ia_addr.sin_addr.s_addr | ( (u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t)(0x000000ff )) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x000000ff)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x000000ff)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x000000ff)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x000000ff) ) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x000000ff ))))) == ip->ip_dst.s_addr) || ((((u_int32_t)(ifatoia(ifa) ->ia_addr.sin_addr.s_addr) & ((u_int32_t) (__uint32_t) (__builtin_constant_p((u_int32_t)(0xc0000000)) ? (__uint32_t) (((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xc0000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xc0000000))))) == ((u_int32_t ) (__uint32_t)(__builtin_constant_p((u_int32_t)(0x80000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x80000000)) & 0xff ) << 24 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff00 ) << 8 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff0000 ) >> 8 | ((__uint32_t)((u_int32_t)(0x80000000)) & 0xff000000 ) >> 24) : __swap32md((u_int32_t)(0x80000000))))) && (ifatoia(ifa)->ia_addr.sin_addr.s_addr | ((u_int32_t) (__uint32_t )(__builtin_constant_p((u_int32_t)(0x0000ffff)) ? (__uint32_t )(((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x0000ffff)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x0000ffff))))) == ip-> ip_dst.s_addr) || ((((u_int32_t)(ifatoia(ifa)->ia_addr.sin_addr .s_addr) & ((u_int32_t) (__uint32_t)(__builtin_constant_p ((u_int32_t)(0x80000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t )(0x80000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t )(0x80000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t )(0x80000000))))) == ((u_int32_t) (__uint32_t)(__builtin_constant_p ((u_int32_t)(0x00000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t )(0x00000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t )(0x00000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t )(0x00000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t )(0x00000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t )(0x00000000))))) && (ifatoia(ifa)->ia_addr.sin_addr .s_addr | ((u_int32_t) (__uint32_t)(__builtin_constant_p((u_int32_t )(0x00ffffff)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0x00ffffff )) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0x00ffffff ))))) == ip->ip_dst.s_addr))) { |
| 824 | match = 1; |
| 825 | break; |
| 826 | } |
| 827 | } |
| 828 | } else if (ipforwarding == 0 && rt->rt_ifidx != ifp->if_index && |
| 829 | !((ifp->if_flags & IFF_LOOPBACK0x8) || (ifp->if_typeif_data.ifi_type == IFT_ENC0xf4) || |
| 830 | (m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags & PF_TAG_TRANSLATE_LOCALHOST0x04))) { |
| 831 | /* received on wrong interface. */ |
| 832 | #if NCARP1 > 0 |
| 833 | struct ifnet *out_if; |
| 834 | |
| 835 | /* |
| 836 | * Virtual IPs on carp interfaces need to be checked also |
| 837 | * against the parent interface and other carp interfaces |
| 838 | * sharing the same parent. |
| 839 | */ |
| 840 | out_if = if_get(rt->rt_ifidx); |
| 841 | if (!(out_if && carp_strict_addr_chk(out_if, ifp))) { |
| 842 | ipstat_inc(ips_wrongif); |
| 843 | match = 2; |
| 844 | } |
| 845 | if_put(out_if); |
| 846 | #else |
| 847 | ipstat_inc(ips_wrongif); |
| 848 | match = 2; |
| 849 | #endif |
| 850 | } |
| 851 | |
| 852 | return (match); |
| 853 | } |
| 854 | |
| 855 | /* |
| 856 | * Take incoming datagram fragment and try to |
| 857 | * reassemble it into whole datagram. If a chain for |
| 858 | * reassembly of this datagram already exists, then it |
| 859 | * is given as fp; otherwise have to make a chain. |
| 860 | */ |
| 861 | struct mbuf * |
| 862 | ip_reass(struct ipqent *ipqe, struct ipq *fp) |
| 863 | { |
| 864 | struct mbuf *m = ipqe->ipqe_m; |
| 865 | struct ipqent *nq, *p, *q; |
| 866 | struct ip *ip; |
| 867 | struct mbuf *t; |
| 868 | int hlen = ipqe->ipqe_ip->ip_hl << 2; |
| 869 | int i, next; |
| 870 | u_int8_t ecn, ecn0; |
| 871 | |
| 872 | MUTEX_ASSERT_LOCKED(&ipq_mutex)do { if (((&ipq_mutex)->mtx_owner != ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof (struct cpu_info, ci_self))); __ci;})) && !(panicstr || db_active)) panic("mutex %p not held in %s", (&ipq_mutex ), __func__); } while (0); |
| 873 | |
| 874 | /* |
| 875 | * Presence of header sizes in mbufs |
| 876 | * would confuse code below. |
| 877 | */ |
| 878 | m->m_datam_hdr.mh_data += hlen; |
| 879 | m->m_lenm_hdr.mh_len -= hlen; |
| 880 | |
| 881 | /* |
| 882 | * If first fragment to arrive, create a reassembly queue. |
| 883 | */ |
| 884 | if (fp == NULL((void *)0)) { |
| 885 | fp = pool_get(&ipq_pool, PR_NOWAIT0x0002); |
| 886 | if (fp == NULL((void *)0)) |
| 887 | goto dropfrag; |
| 888 | LIST_INSERT_HEAD(&ipq, fp, ipq_q)do { if (((fp)->ipq_q.le_next = (&ipq)->lh_first) != ((void *)0)) (&ipq)->lh_first->ipq_q.le_prev = & (fp)->ipq_q.le_next; (&ipq)->lh_first = (fp); (fp)-> ipq_q.le_prev = &(&ipq)->lh_first; } while (0); |
| 889 | fp->ipq_ttl = IPFRAGTTL60; |
| 890 | fp->ipq_p = ipqe->ipqe_ip->ip_p; |
| 891 | fp->ipq_id = ipqe->ipqe_ip->ip_id; |
| 892 | LIST_INIT(&fp->ipq_fragq)do { ((&fp->ipq_fragq)->lh_first) = ((void *)0); } while (0); |
| 893 | fp->ipq_src = ipqe->ipqe_ip->ip_src; |
| 894 | fp->ipq_dst = ipqe->ipqe_ip->ip_dst; |
| 895 | p = NULL((void *)0); |
| 896 | goto insert; |
| 897 | } |
| 898 | |
| 899 | /* |
| 900 | * Handle ECN by comparing this segment with the first one; |
| 901 | * if CE is set, do not lose CE. |
| 902 | * drop if CE and not-ECT are mixed for the same packet. |
| 903 | */ |
| 904 | ecn = ipqe->ipqe_ip->ip_tos & IPTOS_ECN_MASK0x03; |
| 905 | ecn0 = LIST_FIRST(&fp->ipq_fragq)((&fp->ipq_fragq)->lh_first)->ipqe_ip->ip_tos & IPTOS_ECN_MASK0x03; |
| 906 | if (ecn == IPTOS_ECN_CE0x03) { |
| 907 | if (ecn0 == IPTOS_ECN_NOTECT0x00) |
| 908 | goto dropfrag; |
| 909 | if (ecn0 != IPTOS_ECN_CE0x03) |
| 910 | LIST_FIRST(&fp->ipq_fragq)((&fp->ipq_fragq)->lh_first)->ipqe_ip->ip_tos |= |
| 911 | IPTOS_ECN_CE0x03; |
| 912 | } |
| 913 | if (ecn == IPTOS_ECN_NOTECT0x00 && ecn0 != IPTOS_ECN_NOTECT0x00) |
| 914 | goto dropfrag; |
| 915 | |
| 916 | /* |
| 917 | * Find a segment which begins after this one does. |
| 918 | */ |
| 919 | for (p = NULL((void *)0), q = LIST_FIRST(&fp->ipq_fragq)((&fp->ipq_fragq)->lh_first); q != NULL((void *)0); |
| 920 | p = q, q = LIST_NEXT(q, ipqe_q)((q)->ipqe_q.le_next)) |
| 921 | if (ntohs(q->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_off) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_off) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_off)) > ntohs(ipqe->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_off ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_off))) |
| 922 | break; |
| 923 | |
| 924 | /* |
| 925 | * If there is a preceding segment, it may provide some of |
| 926 | * our data already. If so, drop the data from the incoming |
| 927 | * segment. If it provides all of our data, drop us. |
| 928 | */ |
| 929 | if (p != NULL((void *)0)) { |
| 930 | i = ntohs(p->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(p->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(p->ipqe_ip->ip_off) & 0xffU ) << 8 | ((__uint16_t)(p->ipqe_ip->ip_off) & 0xff00U ) >> 8) : __swap16md(p->ipqe_ip->ip_off)) + ntohs(p->ipqe_ip->ip_len)(__uint16_t)(__builtin_constant_p(p->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(p->ipqe_ip->ip_len) & 0xffU ) << 8 | ((__uint16_t)(p->ipqe_ip->ip_len) & 0xff00U ) >> 8) : __swap16md(p->ipqe_ip->ip_len)) - |
| 931 | ntohs(ipqe->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_off ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_off)); |
| 932 | if (i > 0) { |
| 933 | if (i >= ntohs(ipqe->ipqe_ip->ip_len)(__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_len ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_len))) |
| 934 | goto dropfrag; |
| 935 | m_adj(ipqe->ipqe_m, i); |
| 936 | ipqe->ipqe_ip->ip_off = |
| 937 | htons(ntohs(ipqe->ipqe_ip->ip_off) + i)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (ipqe->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(ipqe ->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t )(ipqe->ipqe_ip->ip_off) & 0xff00U) >> 8) : __swap16md (ipqe->ipqe_ip->ip_off)) + i) ? (__uint16_t)(((__uint16_t )((__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_off ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_off)) + i) & 0xffU) << 8 | ((__uint16_t)((__uint16_t )(__builtin_constant_p(ipqe->ipqe_ip->ip_off) ? (__uint16_t )(((__uint16_t)(ipqe->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_off) & 0xff00U ) >> 8) : __swap16md(ipqe->ipqe_ip->ip_off)) + i) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p (ipqe->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(ipqe ->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t )(ipqe->ipqe_ip->ip_off) & 0xff00U) >> 8) : __swap16md (ipqe->ipqe_ip->ip_off)) + i)); |
| 938 | ipqe->ipqe_ip->ip_len = |
| 939 | htons(ntohs(ipqe->ipqe_ip->ip_len) - i)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (ipqe->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(ipqe ->ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ipqe->ipqe_ip->ip_len) & 0xff00U) >> 8) : __swap16md (ipqe->ipqe_ip->ip_len)) - i) ? (__uint16_t)(((__uint16_t )((__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_len ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_len)) - i) & 0xffU) << 8 | ((__uint16_t)((__uint16_t )(__builtin_constant_p(ipqe->ipqe_ip->ip_len) ? (__uint16_t )(((__uint16_t)(ipqe->ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_len) & 0xff00U ) >> 8) : __swap16md(ipqe->ipqe_ip->ip_len)) - i) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p (ipqe->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(ipqe ->ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ipqe->ipqe_ip->ip_len) & 0xff00U) >> 8) : __swap16md (ipqe->ipqe_ip->ip_len)) - i)); |
| 940 | } |
| 941 | } |
| 942 | |
| 943 | /* |
| 944 | * While we overlap succeeding segments trim them or, |
| 945 | * if they are completely covered, dequeue them. |
| 946 | */ |
| 947 | for (; q != NULL((void *)0) && |
| 948 | ntohs(ipqe->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_off ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_off)) + ntohs(ipqe->ipqe_ip->ip_len)(__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_len ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_len)) > |
| 949 | ntohs(q->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_off) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_off) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_off)); q = nq) { |
| 950 | i = (ntohs(ipqe->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_off ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_off ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_off)) + |
| 951 | ntohs(ipqe->ipqe_ip->ip_len)(__uint16_t)(__builtin_constant_p(ipqe->ipqe_ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ipqe->ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ipqe->ipqe_ip->ip_len ) & 0xff00U) >> 8) : __swap16md(ipqe->ipqe_ip-> ip_len))) - ntohs(q->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_off) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_off) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_off)); |
| 952 | if (i < ntohs(q->ipqe_ip->ip_len)(__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_len) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_len) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_len))) { |
| 953 | q->ipqe_ip->ip_len = |
| 954 | htons(ntohs(q->ipqe_ip->ip_len) - i)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (q->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(q-> ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(q ->ipqe_ip->ip_len) & 0xff00U) >> 8) : __swap16md (q->ipqe_ip->ip_len)) - i) ? (__uint16_t)(((__uint16_t) ((__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_len) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_len) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_len)) - i) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p (q->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(q-> ipqe_ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(q ->ipqe_ip->ip_len) & 0xff00U) >> 8) : __swap16md (q->ipqe_ip->ip_len)) - i) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p(q->ipqe_ip-> ip_len) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_len ) & 0xffU) << 8 | ((__uint16_t)(q->ipqe_ip->ip_len ) & 0xff00U) >> 8) : __swap16md(q->ipqe_ip->ip_len )) - i)); |
| 955 | q->ipqe_ip->ip_off = |
| 956 | htons(ntohs(q->ipqe_ip->ip_off) + i)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (q->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(q-> ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(q ->ipqe_ip->ip_off) & 0xff00U) >> 8) : __swap16md (q->ipqe_ip->ip_off)) + i) ? (__uint16_t)(((__uint16_t) ((__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_off) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_off) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_off)) + i) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p (q->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(q-> ipqe_ip->ip_off) & 0xffU) << 8 | ((__uint16_t)(q ->ipqe_ip->ip_off) & 0xff00U) >> 8) : __swap16md (q->ipqe_ip->ip_off)) + i) & 0xff00U) >> 8) : __swap16md((__uint16_t)(__builtin_constant_p(q->ipqe_ip-> ip_off) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_off ) & 0xffU) << 8 | ((__uint16_t)(q->ipqe_ip->ip_off ) & 0xff00U) >> 8) : __swap16md(q->ipqe_ip->ip_off )) + i)); |
| 957 | m_adj(q->ipqe_m, i); |
| 958 | break; |
| 959 | } |
| 960 | nq = LIST_NEXT(q, ipqe_q)((q)->ipqe_q.le_next); |
| 961 | m_freem(q->ipqe_m); |
| 962 | LIST_REMOVE(q, ipqe_q)do { if ((q)->ipqe_q.le_next != ((void *)0)) (q)->ipqe_q .le_next->ipqe_q.le_prev = (q)->ipqe_q.le_prev; *(q)-> ipqe_q.le_prev = (q)->ipqe_q.le_next; ((q)->ipqe_q.le_prev ) = ((void *)-1); ((q)->ipqe_q.le_next) = ((void *)-1); } while (0); |
| 963 | pool_put(&ipqent_pool, q); |
| 964 | ip_frags--; |
| 965 | } |
| 966 | |
| 967 | insert: |
| 968 | /* |
| 969 | * Stick new segment in its place; |
| 970 | * check for complete reassembly. |
| 971 | */ |
| 972 | if (p == NULL((void *)0)) { |
| 973 | LIST_INSERT_HEAD(&fp->ipq_fragq, ipqe, ipqe_q)do { if (((ipqe)->ipqe_q.le_next = (&fp->ipq_fragq) ->lh_first) != ((void *)0)) (&fp->ipq_fragq)->lh_first ->ipqe_q.le_prev = &(ipqe)->ipqe_q.le_next; (&fp ->ipq_fragq)->lh_first = (ipqe); (ipqe)->ipqe_q.le_prev = &(&fp->ipq_fragq)->lh_first; } while (0); |
| 974 | } else { |
| 975 | LIST_INSERT_AFTER(p, ipqe, ipqe_q)do { if (((ipqe)->ipqe_q.le_next = (p)->ipqe_q.le_next) != ((void *)0)) (p)->ipqe_q.le_next->ipqe_q.le_prev = & (ipqe)->ipqe_q.le_next; (p)->ipqe_q.le_next = (ipqe); ( ipqe)->ipqe_q.le_prev = &(p)->ipqe_q.le_next; } while (0); |
| 976 | } |
| 977 | next = 0; |
| 978 | for (p = NULL((void *)0), q = LIST_FIRST(&fp->ipq_fragq)((&fp->ipq_fragq)->lh_first); q != NULL((void *)0); |
| 979 | p = q, q = LIST_NEXT(q, ipqe_q)((q)->ipqe_q.le_next)) { |
| 980 | if (ntohs(q->ipqe_ip->ip_off)(__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_off) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_off) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_off) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_off)) != next) |
| 981 | return (0); |
| 982 | next += ntohs(q->ipqe_ip->ip_len)(__uint16_t)(__builtin_constant_p(q->ipqe_ip->ip_len) ? (__uint16_t)(((__uint16_t)(q->ipqe_ip->ip_len) & 0xffU ) << 8 | ((__uint16_t)(q->ipqe_ip->ip_len) & 0xff00U ) >> 8) : __swap16md(q->ipqe_ip->ip_len)); |
| 983 | } |
| 984 | if (p->ipqe_mff) |
| 985 | return (0); |
| 986 | |
| 987 | /* |
| 988 | * Reassembly is complete. Check for a bogus message size and |
| 989 | * concatenate fragments. |
| 990 | */ |
| 991 | q = LIST_FIRST(&fp->ipq_fragq)((&fp->ipq_fragq)->lh_first); |
| 992 | ip = q->ipqe_ip; |
| 993 | if ((next + (ip->ip_hl << 2)) > IP_MAXPACKET65535) { |
| 994 | ipstat_inc(ips_toolong); |
| 995 | ip_freef(fp); |
| 996 | return (0); |
| 997 | } |
| 998 | m = q->ipqe_m; |
| 999 | t = m->m_nextm_hdr.mh_next; |
| 1000 | m->m_nextm_hdr.mh_next = 0; |
| 1001 | m_cat(m, t); |
| 1002 | nq = LIST_NEXT(q, ipqe_q)((q)->ipqe_q.le_next); |
| 1003 | pool_put(&ipqent_pool, q); |
| 1004 | ip_frags--; |
| 1005 | for (q = nq; q != NULL((void *)0); q = nq) { |
| 1006 | t = q->ipqe_m; |
| 1007 | nq = LIST_NEXT(q, ipqe_q)((q)->ipqe_q.le_next); |
| 1008 | pool_put(&ipqent_pool, q); |
| 1009 | ip_frags--; |
| 1010 | m_removehdr(t); |
| 1011 | m_cat(m, t); |
| 1012 | } |
| 1013 | |
| 1014 | /* |
| 1015 | * Create header for new ip packet by |
| 1016 | * modifying header of first packet; |
| 1017 | * dequeue and discard fragment reassembly header. |
| 1018 | * Make header visible. |
| 1019 | */ |
| 1020 | ip->ip_len = htons(next)(__uint16_t)(__builtin_constant_p(next) ? (__uint16_t)(((__uint16_t )(next) & 0xffU) << 8 | ((__uint16_t)(next) & 0xff00U ) >> 8) : __swap16md(next)); |
| 1021 | ip->ip_src = fp->ipq_src; |
| 1022 | ip->ip_dst = fp->ipq_dst; |
| 1023 | LIST_REMOVE(fp, ipq_q)do { if ((fp)->ipq_q.le_next != ((void *)0)) (fp)->ipq_q .le_next->ipq_q.le_prev = (fp)->ipq_q.le_prev; *(fp)-> ipq_q.le_prev = (fp)->ipq_q.le_next; ((fp)->ipq_q.le_prev ) = ((void *)-1); ((fp)->ipq_q.le_next) = ((void *)-1); } while (0); |
| 1024 | pool_put(&ipq_pool, fp); |
| 1025 | m->m_lenm_hdr.mh_len += (ip->ip_hl << 2); |
| 1026 | m->m_datam_hdr.mh_data -= (ip->ip_hl << 2); |
| 1027 | m_calchdrlen(m); |
| 1028 | return (m); |
| 1029 | |
| 1030 | dropfrag: |
| 1031 | ipstat_inc(ips_fragdropped); |
| 1032 | m_freem(m); |
| 1033 | pool_put(&ipqent_pool, ipqe); |
| 1034 | ip_frags--; |
| 1035 | return (NULL((void *)0)); |
| 1036 | } |
| 1037 | |
| 1038 | /* |
| 1039 | * Free a fragment reassembly header and all |
| 1040 | * associated datagrams. |
| 1041 | */ |
| 1042 | void |
| 1043 | ip_freef(struct ipq *fp) |
| 1044 | { |
| 1045 | struct ipqent *q; |
| 1046 | |
| 1047 | MUTEX_ASSERT_LOCKED(&ipq_mutex)do { if (((&ipq_mutex)->mtx_owner != ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof (struct cpu_info, ci_self))); __ci;})) && !(panicstr || db_active)) panic("mutex %p not held in %s", (&ipq_mutex ), __func__); } while (0); |
| 1048 | |
| 1049 | while ((q = LIST_FIRST(&fp->ipq_fragq)((&fp->ipq_fragq)->lh_first)) != NULL((void *)0)) { |
| 1050 | LIST_REMOVE(q, ipqe_q)do { if ((q)->ipqe_q.le_next != ((void *)0)) (q)->ipqe_q .le_next->ipqe_q.le_prev = (q)->ipqe_q.le_prev; *(q)-> ipqe_q.le_prev = (q)->ipqe_q.le_next; ((q)->ipqe_q.le_prev ) = ((void *)-1); ((q)->ipqe_q.le_next) = ((void *)-1); } while (0); |
| 1051 | m_freem(q->ipqe_m); |
| 1052 | pool_put(&ipqent_pool, q); |
| 1053 | ip_frags--; |
| 1054 | } |
| 1055 | LIST_REMOVE(fp, ipq_q)do { if ((fp)->ipq_q.le_next != ((void *)0)) (fp)->ipq_q .le_next->ipq_q.le_prev = (fp)->ipq_q.le_prev; *(fp)-> ipq_q.le_prev = (fp)->ipq_q.le_next; ((fp)->ipq_q.le_prev ) = ((void *)-1); ((fp)->ipq_q.le_next) = ((void *)-1); } while (0); |
| 1056 | pool_put(&ipq_pool, fp); |
| 1057 | } |
| 1058 | |
| 1059 | /* |
| 1060 | * IP timer processing; |
| 1061 | * if a timer expires on a reassembly queue, discard it. |
| 1062 | */ |
| 1063 | void |
| 1064 | ip_slowtimo(void) |
| 1065 | { |
| 1066 | struct ipq *fp, *nfp; |
| 1067 | |
| 1068 | mtx_enter(&ipq_mutex); |
| 1069 | LIST_FOREACH_SAFE(fp, &ipq, ipq_q, nfp)for ((fp) = ((&ipq)->lh_first); (fp) && ((nfp) = ((fp)->ipq_q.le_next), 1); (fp) = (nfp)) { |
| 1070 | if (--fp->ipq_ttl == 0) { |
| 1071 | ipstat_inc(ips_fragtimeout); |
| 1072 | ip_freef(fp); |
| 1073 | } |
| 1074 | } |
| 1075 | mtx_leave(&ipq_mutex); |
| 1076 | } |
| 1077 | |
| 1078 | /* |
| 1079 | * Flush a bunch of datagram fragments, till we are down to 75%. |
| 1080 | */ |
| 1081 | void |
| 1082 | ip_flush(void) |
| 1083 | { |
| 1084 | int max = 50; |
| 1085 | |
| 1086 | MUTEX_ASSERT_LOCKED(&ipq_mutex)do { if (((&ipq_mutex)->mtx_owner != ({struct cpu_info *__ci; asm volatile("movq %%gs:%P1,%0" : "=r" (__ci) :"n" (__builtin_offsetof (struct cpu_info, ci_self))); __ci;})) && !(panicstr || db_active)) panic("mutex %p not held in %s", (&ipq_mutex ), __func__); } while (0); |
| 1087 | |
| 1088 | while (!LIST_EMPTY(&ipq)(((&ipq)->lh_first) == ((void *)0)) && ip_frags > ip_maxqueue * 3 / 4 && --max) { |
| 1089 | ipstat_inc(ips_fragdropped); |
| 1090 | ip_freef(LIST_FIRST(&ipq)((&ipq)->lh_first)); |
| 1091 | } |
| 1092 | } |
| 1093 | |
| 1094 | /* |
| 1095 | * Do option processing on a datagram, |
| 1096 | * possibly discarding it if bad options are encountered, |
| 1097 | * or forwarding it if source-routed. |
| 1098 | * Returns 1 if packet has been forwarded/freed, |
| 1099 | * 0 if the packet should be processed further. |
| 1100 | */ |
| 1101 | int |
| 1102 | ip_dooptions(struct mbuf *m, struct ifnet *ifp) |
| 1103 | { |
| 1104 | struct ip *ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1105 | unsigned int rtableid = m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid; |
| 1106 | struct rtentry *rt; |
| 1107 | struct sockaddr_in ipaddr; |
| 1108 | u_char *cp; |
| 1109 | struct ip_timestamp ipt; |
| 1110 | struct in_ifaddr *ia; |
| 1111 | int opt, optlen, cnt, off, code, type = ICMP_PARAMPROB12, forward = 0; |
| 1112 | struct in_addr sin, dst; |
| 1113 | u_int32_t ntime; |
| 1114 | |
| 1115 | dst = ip->ip_dst; |
| 1116 | cp = (u_char *)(ip + 1); |
| 1117 | cnt = (ip->ip_hl << 2) - sizeof (struct ip); |
| 1118 | |
| 1119 | KERNEL_LOCK()_kernel_lock(); |
| 1120 | for (; cnt > 0; cnt -= optlen, cp += optlen) { |
| 1121 | opt = cp[IPOPT_OPTVAL0]; |
| 1122 | if (opt == IPOPT_EOL0) |
| 1123 | break; |
| 1124 | if (opt == IPOPT_NOP1) |
| 1125 | optlen = 1; |
| 1126 | else { |
| 1127 | if (cnt < IPOPT_OLEN1 + sizeof(*cp)) { |
| 1128 | code = &cp[IPOPT_OLEN1] - (u_char *)ip; |
| 1129 | goto bad; |
| 1130 | } |
| 1131 | optlen = cp[IPOPT_OLEN1]; |
| 1132 | if (optlen < IPOPT_OLEN1 + sizeof(*cp) || optlen > cnt) { |
| 1133 | code = &cp[IPOPT_OLEN1] - (u_char *)ip; |
| 1134 | goto bad; |
| 1135 | } |
| 1136 | } |
| 1137 | |
| 1138 | switch (opt) { |
| 1139 | |
| 1140 | default: |
| 1141 | break; |
| 1142 | |
| 1143 | /* |
| 1144 | * Source routing with record. |
| 1145 | * Find interface with current destination address. |
| 1146 | * If none on this machine then drop if strictly routed, |
| 1147 | * or do nothing if loosely routed. |
| 1148 | * Record interface address and bring up next address |
| 1149 | * component. If strictly routed make sure next |
| 1150 | * address is on directly accessible net. |
| 1151 | */ |
| 1152 | case IPOPT_LSRR131: |
| 1153 | case IPOPT_SSRR137: |
| 1154 | if (!ip_dosourceroute) { |
| 1155 | type = ICMP_UNREACH3; |
| 1156 | code = ICMP_UNREACH_SRCFAIL5; |
| 1157 | goto bad; |
| 1158 | } |
| 1159 | if (optlen < IPOPT_OFFSET2 + sizeof(*cp)) { |
| 1160 | code = &cp[IPOPT_OLEN1] - (u_char *)ip; |
| 1161 | goto bad; |
| 1162 | } |
| 1163 | if ((off = cp[IPOPT_OFFSET2]) < IPOPT_MINOFF4) { |
| 1164 | code = &cp[IPOPT_OFFSET2] - (u_char *)ip; |
| 1165 | goto bad; |
| 1166 | } |
| 1167 | memset(&ipaddr, 0, sizeof(ipaddr))__builtin_memset((&ipaddr), (0), (sizeof(ipaddr))); |
| 1168 | ipaddr.sin_family = AF_INET2; |
| 1169 | ipaddr.sin_len = sizeof(ipaddr); |
| 1170 | ipaddr.sin_addr = ip->ip_dst; |
| 1171 | ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr), |
| 1172 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid)); |
| 1173 | if (ia == NULL((void *)0)) { |
| 1174 | if (opt == IPOPT_SSRR137) { |
| 1175 | type = ICMP_UNREACH3; |
| 1176 | code = ICMP_UNREACH_SRCFAIL5; |
| 1177 | goto bad; |
| 1178 | } |
| 1179 | /* |
| 1180 | * Loose routing, and not at next destination |
| 1181 | * yet; nothing to do except forward. |
| 1182 | */ |
| 1183 | break; |
| 1184 | } |
| 1185 | off--; /* 0 origin */ |
| 1186 | if ((off + sizeof(struct in_addr)) > optlen) { |
| 1187 | /* |
| 1188 | * End of source route. Should be for us. |
| 1189 | */ |
| 1190 | save_rte(m, cp, ip->ip_src); |
| 1191 | break; |
| 1192 | } |
| 1193 | |
| 1194 | /* |
| 1195 | * locate outgoing interface |
| 1196 | */ |
| 1197 | memset(&ipaddr, 0, sizeof(ipaddr))__builtin_memset((&ipaddr), (0), (sizeof(ipaddr))); |
| 1198 | ipaddr.sin_family = AF_INET2; |
| 1199 | ipaddr.sin_len = sizeof(ipaddr); |
| 1200 | memcpy(&ipaddr.sin_addr, cp + off,__builtin_memcpy((&ipaddr.sin_addr), (cp + off), (sizeof( ipaddr.sin_addr))) |
| 1201 | sizeof(ipaddr.sin_addr))__builtin_memcpy((&ipaddr.sin_addr), (cp + off), (sizeof( ipaddr.sin_addr))); |
| 1202 | /* keep packet in the virtual instance */ |
| 1203 | rt = rtalloc(sintosa(&ipaddr), RT_RESOLVE1, rtableid); |
| 1204 | if (!rtisvalid(rt) || ((opt == IPOPT_SSRR137) && |
| 1205 | ISSET(rt->rt_flags, RTF_GATEWAY)((rt->rt_flags) & (0x2)))) { |
| 1206 | type = ICMP_UNREACH3; |
| 1207 | code = ICMP_UNREACH_SRCFAIL5; |
| 1208 | rtfree(rt); |
| 1209 | goto bad; |
| 1210 | } |
| 1211 | ia = ifatoia(rt->rt_ifa); |
| 1212 | memcpy(cp + off, &ia->ia_addr.sin_addr,__builtin_memcpy((cp + off), (&ia->ia_addr.sin_addr), ( sizeof(struct in_addr))) |
| 1213 | sizeof(struct in_addr))__builtin_memcpy((cp + off), (&ia->ia_addr.sin_addr), ( sizeof(struct in_addr))); |
| 1214 | rtfree(rt); |
| 1215 | cp[IPOPT_OFFSET2] += sizeof(struct in_addr); |
| 1216 | ip->ip_dst = ipaddr.sin_addr; |
| 1217 | /* |
| 1218 | * Let ip_intr's mcast routing check handle mcast pkts |
| 1219 | */ |
| 1220 | forward = !IN_MULTICAST(ip->ip_dst.s_addr)(((u_int32_t)(ip->ip_dst.s_addr) & ((u_int32_t) (__uint32_t )(__builtin_constant_p((u_int32_t)(0xf0000000)) ? (__uint32_t )(((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff) << 24 | ((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff00) << 8 | ((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff0000) >> 8 | ((__uint32_t)((u_int32_t)(0xf0000000)) & 0xff000000) >> 24) : __swap32md((u_int32_t)(0xf0000000))))) == ((u_int32_t ) (__uint32_t)(__builtin_constant_p((u_int32_t)(0xe0000000)) ? (__uint32_t)(((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff ) << 24 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff00 ) << 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff0000 ) >> 8 | ((__uint32_t)((u_int32_t)(0xe0000000)) & 0xff000000 ) >> 24) : __swap32md((u_int32_t)(0xe0000000))))); |
| 1221 | break; |
| 1222 | |
| 1223 | case IPOPT_RR7: |
| 1224 | if (optlen < IPOPT_OFFSET2 + sizeof(*cp)) { |
| 1225 | code = &cp[IPOPT_OLEN1] - (u_char *)ip; |
| 1226 | goto bad; |
| 1227 | } |
| 1228 | if ((off = cp[IPOPT_OFFSET2]) < IPOPT_MINOFF4) { |
| 1229 | code = &cp[IPOPT_OFFSET2] - (u_char *)ip; |
| 1230 | goto bad; |
| 1231 | } |
| 1232 | |
| 1233 | /* |
| 1234 | * If no space remains, ignore. |
| 1235 | */ |
| 1236 | off--; /* 0 origin */ |
| 1237 | if ((off + sizeof(struct in_addr)) > optlen) |
| 1238 | break; |
| 1239 | memset(&ipaddr, 0, sizeof(ipaddr))__builtin_memset((&ipaddr), (0), (sizeof(ipaddr))); |
| 1240 | ipaddr.sin_family = AF_INET2; |
| 1241 | ipaddr.sin_len = sizeof(ipaddr); |
| 1242 | ipaddr.sin_addr = ip->ip_dst; |
| 1243 | /* |
| 1244 | * locate outgoing interface; if we're the destination, |
| 1245 | * use the incoming interface (should be same). |
| 1246 | * Again keep the packet inside the virtual instance. |
| 1247 | */ |
| 1248 | rt = rtalloc(sintosa(&ipaddr), RT_RESOLVE1, rtableid); |
| 1249 | if (!rtisvalid(rt)) { |
| 1250 | type = ICMP_UNREACH3; |
| 1251 | code = ICMP_UNREACH_HOST1; |
| 1252 | rtfree(rt); |
| 1253 | goto bad; |
| 1254 | } |
| 1255 | ia = ifatoia(rt->rt_ifa); |
| 1256 | memcpy(cp + off, &ia->ia_addr.sin_addr,__builtin_memcpy((cp + off), (&ia->ia_addr.sin_addr), ( sizeof(struct in_addr))) |
| 1257 | sizeof(struct in_addr))__builtin_memcpy((cp + off), (&ia->ia_addr.sin_addr), ( sizeof(struct in_addr))); |
| 1258 | rtfree(rt); |
| 1259 | cp[IPOPT_OFFSET2] += sizeof(struct in_addr); |
| 1260 | break; |
| 1261 | |
| 1262 | case IPOPT_TS68: |
| 1263 | code = cp - (u_char *)ip; |
| 1264 | if (optlen < sizeof(struct ip_timestamp)) |
| 1265 | goto bad; |
| 1266 | memcpy(&ipt, cp, sizeof(struct ip_timestamp))__builtin_memcpy((&ipt), (cp), (sizeof(struct ip_timestamp ))); |
| 1267 | if (ipt.ipt_ptr < 5 || ipt.ipt_len < 5) |
| 1268 | goto bad; |
| 1269 | if (ipt.ipt_ptr - 1 + sizeof(u_int32_t) > ipt.ipt_len) { |
| 1270 | if (++ipt.ipt_oflw == 0) |
| 1271 | goto bad; |
| 1272 | break; |
| 1273 | } |
| 1274 | memcpy(&sin, cp + ipt.ipt_ptr - 1, sizeof sin)__builtin_memcpy((&sin), (cp + ipt.ipt_ptr - 1), (sizeof sin )); |
| 1275 | switch (ipt.ipt_flg) { |
| 1276 | |
| 1277 | case IPOPT_TS_TSONLY0: |
| 1278 | break; |
| 1279 | |
| 1280 | case IPOPT_TS_TSANDADDR1: |
| 1281 | if (ipt.ipt_ptr - 1 + sizeof(u_int32_t) + |
| 1282 | sizeof(struct in_addr) > ipt.ipt_len) |
| 1283 | goto bad; |
| 1284 | memset(&ipaddr, 0, sizeof(ipaddr))__builtin_memset((&ipaddr), (0), (sizeof(ipaddr))); |
| 1285 | ipaddr.sin_family = AF_INET2; |
| 1286 | ipaddr.sin_len = sizeof(ipaddr); |
| 1287 | ipaddr.sin_addr = dst; |
| 1288 | ia = ifatoia(ifaof_ifpforaddr(sintosa(&ipaddr), |
| 1289 | ifp)); |
| 1290 | if (ia == NULL((void *)0)) |
| 1291 | continue; |
| 1292 | memcpy(&sin, &ia->ia_addr.sin_addr,__builtin_memcpy((&sin), (&ia->ia_addr.sin_addr), ( sizeof(struct in_addr))) |
| 1293 | sizeof(struct in_addr))__builtin_memcpy((&sin), (&ia->ia_addr.sin_addr), ( sizeof(struct in_addr))); |
| 1294 | ipt.ipt_ptr += sizeof(struct in_addr); |
| 1295 | break; |
| 1296 | |
| 1297 | case IPOPT_TS_PRESPEC3: |
| 1298 | if (ipt.ipt_ptr - 1 + sizeof(u_int32_t) + |
| 1299 | sizeof(struct in_addr) > ipt.ipt_len) |
| 1300 | goto bad; |
| 1301 | memset(&ipaddr, 0, sizeof(ipaddr))__builtin_memset((&ipaddr), (0), (sizeof(ipaddr))); |
| 1302 | ipaddr.sin_family = AF_INET2; |
| 1303 | ipaddr.sin_len = sizeof(ipaddr); |
| 1304 | ipaddr.sin_addr = sin; |
| 1305 | if (ifa_ifwithaddr(sintosa(&ipaddr), |
| 1306 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid) == NULL((void *)0)) |
| 1307 | continue; |
| 1308 | ipt.ipt_ptr += sizeof(struct in_addr); |
| 1309 | break; |
| 1310 | |
| 1311 | default: |
| 1312 | /* XXX can't take &ipt->ipt_flg */ |
| 1313 | code = (u_char *)&ipt.ipt_ptr - |
| 1314 | (u_char *)ip + 1; |
| 1315 | goto bad; |
| 1316 | } |
| 1317 | ntime = iptime(); |
| 1318 | memcpy(cp + ipt.ipt_ptr - 1, &ntime, sizeof(u_int32_t))__builtin_memcpy((cp + ipt.ipt_ptr - 1), (&ntime), (sizeof (u_int32_t))); |
| 1319 | ipt.ipt_ptr += sizeof(u_int32_t); |
| 1320 | } |
| 1321 | } |
| 1322 | KERNEL_UNLOCK()_kernel_unlock(); |
| 1323 | if (forward && ipforwarding > 0) { |
| 1324 | ip_forward(m, ifp, NULL((void *)0), 1); |
| 1325 | return (1); |
| 1326 | } |
| 1327 | return (0); |
| 1328 | bad: |
| 1329 | KERNEL_UNLOCK()_kernel_unlock(); |
| 1330 | icmp_error(m, type, code, 0, 0); |
| 1331 | ipstat_inc(ips_badoptions); |
| 1332 | return (1); |
| 1333 | } |
| 1334 | |
| 1335 | /* |
| 1336 | * Save incoming source route for use in replies, |
| 1337 | * to be picked up later by ip_srcroute if the receiver is interested. |
| 1338 | */ |
| 1339 | void |
| 1340 | save_rte(struct mbuf *m, u_char *option, struct in_addr dst) |
| 1341 | { |
| 1342 | struct ip_srcrt *isr; |
| 1343 | struct m_tag *mtag; |
| 1344 | unsigned olen; |
| 1345 | |
| 1346 | olen = option[IPOPT_OLEN1]; |
| 1347 | if (olen > sizeof(isr->isr_hdr) + sizeof(isr->isr_routes)) |
| 1348 | return; |
| 1349 | |
| 1350 | mtag = m_tag_get(PACKET_TAG_SRCROUTE0x1000, sizeof(*isr), M_NOWAIT0x0002); |
| 1351 | if (mtag == NULL((void *)0)) { |
| 1352 | ipstat_inc(ips_idropped); |
| 1353 | return; |
| 1354 | } |
| 1355 | isr = (struct ip_srcrt *)(mtag + 1); |
| 1356 | |
| 1357 | memcpy(isr->isr_hdr, option, olen)__builtin_memcpy((isr->isr_hdr), (option), (olen)); |
| 1358 | isr->isr_nhops = (olen - IPOPT_OFFSET2 - 1) / sizeof(struct in_addr); |
| 1359 | isr->isr_dst = dst; |
| 1360 | m_tag_prepend(m, mtag); |
| 1361 | } |
| 1362 | |
| 1363 | /* |
| 1364 | * Retrieve incoming source route for use in replies, |
| 1365 | * in the same form used by setsockopt. |
| 1366 | * The first hop is placed before the options, will be removed later. |
| 1367 | */ |
| 1368 | struct mbuf * |
| 1369 | ip_srcroute(struct mbuf *m0) |
| 1370 | { |
| 1371 | struct in_addr *p, *q; |
| 1372 | struct mbuf *m; |
| 1373 | struct ip_srcrt *isr; |
| 1374 | struct m_tag *mtag; |
| 1375 | |
| 1376 | if (!ip_dosourceroute) |
| 1377 | return (NULL((void *)0)); |
| 1378 | |
| 1379 | mtag = m_tag_find(m0, PACKET_TAG_SRCROUTE0x1000, NULL((void *)0)); |
| 1380 | if (mtag == NULL((void *)0)) |
| 1381 | return (NULL((void *)0)); |
| 1382 | isr = (struct ip_srcrt *)(mtag + 1); |
| 1383 | |
| 1384 | if (isr->isr_nhops == 0) |
| 1385 | return (NULL((void *)0)); |
| 1386 | m = m_get(M_DONTWAIT0x0002, MT_SOOPTS4); |
| 1387 | if (m == NULL((void *)0)) { |
| 1388 | ipstat_inc(ips_idropped); |
| 1389 | return (NULL((void *)0)); |
| 1390 | } |
| 1391 | |
| 1392 | #define OPTSIZ (sizeof(isr->isr_nop) + sizeof(isr->isr_hdr)) |
| 1393 | |
| 1394 | /* length is (nhops+1)*sizeof(addr) + sizeof(nop + header) */ |
| 1395 | m->m_lenm_hdr.mh_len = (isr->isr_nhops + 1) * sizeof(struct in_addr) + OPTSIZ; |
| 1396 | |
| 1397 | /* |
| 1398 | * First save first hop for return route |
| 1399 | */ |
| 1400 | p = &(isr->isr_routes[isr->isr_nhops - 1]); |
| 1401 | *(mtod(m, struct in_addr *)((struct in_addr *)((m)->m_hdr.mh_data))) = *p--; |
| 1402 | |
| 1403 | /* |
| 1404 | * Copy option fields and padding (nop) to mbuf. |
| 1405 | */ |
| 1406 | isr->isr_nop = IPOPT_NOP1; |
| 1407 | isr->isr_hdr[IPOPT_OFFSET2] = IPOPT_MINOFF4; |
| 1408 | memcpy(mtod(m, caddr_t) + sizeof(struct in_addr), &isr->isr_nop,__builtin_memcpy((((caddr_t)((m)->m_hdr.mh_data)) + sizeof (struct in_addr)), (&isr->isr_nop), (OPTSIZ)) |
| 1409 | OPTSIZ)__builtin_memcpy((((caddr_t)((m)->m_hdr.mh_data)) + sizeof (struct in_addr)), (&isr->isr_nop), (OPTSIZ)); |
| 1410 | q = (struct in_addr *)(mtod(m, caddr_t)((caddr_t)((m)->m_hdr.mh_data)) + |
| 1411 | sizeof(struct in_addr) + OPTSIZ); |
| 1412 | #undef OPTSIZ |
| 1413 | /* |
| 1414 | * Record return path as an IP source route, |
| 1415 | * reversing the path (pointers are now aligned). |
| 1416 | */ |
| 1417 | while (p >= isr->isr_routes) { |
| 1418 | *q++ = *p--; |
| 1419 | } |
| 1420 | /* |
| 1421 | * Last hop goes to final destination. |
| 1422 | */ |
| 1423 | *q = isr->isr_dst; |
| 1424 | m_tag_delete(m0, (struct m_tag *)isr); |
| 1425 | return (m); |
| 1426 | } |
| 1427 | |
| 1428 | /* |
| 1429 | * Strip out IP options, at higher level protocol in the kernel. |
| 1430 | */ |
| 1431 | void |
| 1432 | ip_stripoptions(struct mbuf *m) |
| 1433 | { |
| 1434 | int i; |
| 1435 | struct ip *ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1436 | caddr_t opts; |
| 1437 | int olen; |
| 1438 | |
| 1439 | olen = (ip->ip_hl<<2) - sizeof (struct ip); |
| 1440 | opts = (caddr_t)(ip + 1); |
| 1441 | i = m->m_lenm_hdr.mh_len - (sizeof (struct ip) + olen); |
| 1442 | memmove(opts, opts + olen, i)__builtin_memmove((opts), (opts + olen), (i)); |
| 1443 | m->m_lenm_hdr.mh_len -= olen; |
| 1444 | if (m->m_flagsm_hdr.mh_flags & M_PKTHDR0x0002) |
| 1445 | m->m_pkthdrM_dat.MH.MH_pkthdr.len -= olen; |
| 1446 | ip->ip_hl = sizeof(struct ip) >> 2; |
| 1447 | ip->ip_len = htons(ntohs(ip->ip_len) - olen)(__uint16_t)(__builtin_constant_p((__uint16_t)(__builtin_constant_p (ip->ip_len) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U ) >> 8) : __swap16md(ip->ip_len)) - olen) ? (__uint16_t )(((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) - olen) & 0xffU) << 8 | ((__uint16_t)((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) - olen) & 0xff00U) >> 8 ) : __swap16md((__uint16_t)(__builtin_constant_p(ip->ip_len ) ? (__uint16_t)(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t)(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip->ip_len)) - olen)); |
| 1448 | } |
| 1449 | |
| 1450 | const u_char inetctlerrmap[PRC_NCMDS21] = { |
| 1451 | 0, 0, 0, 0, |
| 1452 | 0, EMSGSIZE40, EHOSTDOWN64, EHOSTUNREACH65, |
| 1453 | EHOSTUNREACH65, EHOSTUNREACH65, ECONNREFUSED61, ECONNREFUSED61, |
| 1454 | EMSGSIZE40, EHOSTUNREACH65, 0, 0, |
| 1455 | 0, 0, 0, 0, |
| 1456 | ENOPROTOOPT42 |
| 1457 | }; |
| 1458 | |
| 1459 | /* |
| 1460 | * Forward a packet. If some error occurs return the sender |
| 1461 | * an icmp packet. Note we can't always generate a meaningful |
| 1462 | * icmp message because icmp doesn't have a large enough repertoire |
| 1463 | * of codes and types. |
| 1464 | * |
| 1465 | * If not forwarding, just drop the packet. This could be confusing |
| 1466 | * if ipforwarding was zero but some routing protocol was advancing |
| 1467 | * us as a gateway to somewhere. However, we must let the routing |
| 1468 | * protocol deal with that. |
| 1469 | * |
| 1470 | * The srcrt parameter indicates whether the packet is being forwarded |
| 1471 | * via a source route. |
| 1472 | */ |
| 1473 | void |
| 1474 | ip_forward(struct mbuf *m, struct ifnet *ifp, struct rtentry *rt, int srcrt) |
| 1475 | { |
| 1476 | struct mbuf mfake, *mcopy = NULL((void *)0); |
| 1477 | struct ip *ip = mtod(m, struct ip *)((struct ip *)((m)->m_hdr.mh_data)); |
| 1478 | struct sockaddr_in *sin; |
| 1479 | struct route ro; |
| 1480 | int error = 0, type = 0, code = 0, destmtu = 0, fake = 0, len; |
| 1481 | u_int32_t dest; |
| 1482 | |
| 1483 | dest = 0; |
| 1484 | if (m->m_flagsm_hdr.mh_flags & (M_BCAST0x0100|M_MCAST0x0200) || in_canforward(ip->ip_dst) == 0) { |
| 1485 | ipstat_inc(ips_cantforward); |
| 1486 | m_freem(m); |
| 1487 | goto freecopy; |
| 1488 | } |
| 1489 | if (ip->ip_ttl <= IPTTLDEC1) { |
| 1490 | icmp_error(m, ICMP_TIMXCEED11, ICMP_TIMXCEED_INTRANS0, dest, 0); |
| 1491 | goto freecopy; |
| 1492 | } |
| 1493 | |
| 1494 | memset(&ro, 0, sizeof(ro))__builtin_memset((&ro), (0), (sizeof(ro))); |
| 1495 | sin = satosin(&ro.ro_dst); |
| 1496 | sin->sin_family = AF_INET2; |
| 1497 | sin->sin_len = sizeof(*sin); |
| 1498 | sin->sin_addr = ip->ip_dst; |
| 1499 | |
| 1500 | if (!rtisvalid(rt)) { |
| 1501 | rtfree(rt); |
| 1502 | rt = rtalloc_mpath(sintosa(sin), &ip->ip_src.s_addr, |
| 1503 | m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid); |
| 1504 | if (rt == NULL((void *)0)) { |
| 1505 | ipstat_inc(ips_noroute); |
| 1506 | icmp_error(m, ICMP_UNREACH3, ICMP_UNREACH_HOST1, dest, 0); |
| 1507 | return; |
| 1508 | } |
| 1509 | } |
| 1510 | |
| 1511 | /* |
| 1512 | * Save at most 68 bytes of the packet in case |
| 1513 | * we need to generate an ICMP message to the src. |
| 1514 | * The data is saved in the mbuf on the stack that |
| 1515 | * acts as a temporary storage not intended to be |
| 1516 | * passed down the IP stack or to the mfree. |
| 1517 | */ |
| 1518 | memset(&mfake.m_hdr, 0, sizeof(mfake.m_hdr))__builtin_memset((&mfake.m_hdr), (0), (sizeof(mfake.m_hdr ))); |
| 1519 | mfake.m_typem_hdr.mh_type = m->m_typem_hdr.mh_type; |
| 1520 | if (m_dup_pkthdr(&mfake, m, M_DONTWAIT0x0002) == 0) { |
| 1521 | mfake.m_datam_hdr.mh_data = mfake.m_pktdatM_dat.MH.MH_dat.MH_databuf; |
| 1522 | len = min(ntohs(ip->ip_len)(__uint16_t)(__builtin_constant_p(ip->ip_len) ? (__uint16_t )(((__uint16_t)(ip->ip_len) & 0xffU) << 8 | ((__uint16_t )(ip->ip_len) & 0xff00U) >> 8) : __swap16md(ip-> ip_len)), 68); |
| 1523 | m_copydata(m, 0, len, mfake.m_pktdatM_dat.MH.MH_dat.MH_databuf); |
| 1524 | mfake.m_pkthdrM_dat.MH.MH_pkthdr.len = mfake.m_lenm_hdr.mh_len = len; |
| 1525 | #if NPF1 > 0 |
| 1526 | pf_pkt_addr_changed(&mfake); |
| 1527 | #endif /* NPF > 0 */ |
| 1528 | fake = 1; |
| 1529 | } |
| 1530 | |
| 1531 | ip->ip_ttl -= IPTTLDEC1; |
| 1532 | |
| 1533 | /* |
| 1534 | * If forwarding packet using same interface that it came in on, |
| 1535 | * perhaps should send a redirect to sender to shortcut a hop. |
| 1536 | * Only send redirect if source is sending directly to us, |
| 1537 | * and if packet was not source routed (or has any options). |
| 1538 | * Also, don't send redirect if forwarding using a default route |
| 1539 | * or a route modified by a redirect. |
| 1540 | * Don't send redirect if we advertise destination's arp address |
| 1541 | * as ours (proxy arp). |
| 1542 | */ |
| 1543 | if ((rt->rt_ifidx == ifp->if_index) && |
| 1544 | (rt->rt_flags & (RTF_DYNAMIC0x10|RTF_MODIFIED0x20)) == 0 && |
| 1545 | satosin(rt_key(rt)((rt)->rt_dest))->sin_addr.s_addr != 0 && |
| 1546 | ipsendredirects && !srcrt && |
| 1547 | !arpproxy(satosin(rt_key(rt)((rt)->rt_dest))->sin_addr, m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid)) { |
| 1548 | if ((ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_netmask) == |
| 1549 | ifatoia(rt->rt_ifa)->ia_net) { |
| 1550 | if (rt->rt_flags & RTF_GATEWAY0x2) |
| 1551 | dest = satosin(rt->rt_gateway)->sin_addr.s_addr; |
| 1552 | else |
| 1553 | dest = ip->ip_dst.s_addr; |
| 1554 | /* Router requirements says to only send host redirects */ |
| 1555 | type = ICMP_REDIRECT5; |
| 1556 | code = ICMP_REDIRECT_HOST1; |
| 1557 | } |
| 1558 | } |
| 1559 | |
| 1560 | ro.ro_rt = rt; |
| 1561 | ro.ro_tableid = m->m_pkthdrM_dat.MH.MH_pkthdr.ph_rtableid; |
| 1562 | error = ip_output(m, NULL((void *)0), &ro, |
| 1563 | (IP_FORWARDING0x1 | (ip_directedbcast ? IP_ALLOWBROADCAST0x0020 : 0)), |
| 1564 | NULL((void *)0), NULL((void *)0), 0); |
| 1565 | rt = ro.ro_rt; |
| 1566 | if (error) |
| 1567 | ipstat_inc(ips_cantforward); |
| 1568 | else { |
| 1569 | ipstat_inc(ips_forward); |
| 1570 | if (type) |
| 1571 | ipstat_inc(ips_redirectsent); |
| 1572 | else |
| 1573 | goto freecopy; |
| 1574 | } |
| 1575 | if (!fake) |
| 1576 | goto freecopy; |
| 1577 | |
| 1578 | switch (error) { |
| 1579 | case 0: /* forwarded, but need redirect */ |
| 1580 | /* type, code set above */ |
| 1581 | break; |
| 1582 | |
| 1583 | case EMSGSIZE40: |
| 1584 | type = ICMP_UNREACH3; |
| 1585 | code = ICMP_UNREACH_NEEDFRAG4; |
| 1586 | if (rt != NULL((void *)0)) { |
| 1587 | if (rt->rt_mturt_rmx.rmx_mtu) { |
| 1588 | destmtu = rt->rt_mturt_rmx.rmx_mtu; |
| 1589 | } else { |
| 1590 | struct ifnet *destifp; |
| 1591 | |
| 1592 | destifp = if_get(rt->rt_ifidx); |
| 1593 | if (destifp != NULL((void *)0)) |
| 1594 | destmtu = destifp->if_mtuif_data.ifi_mtu; |
| 1595 | if_put(destifp); |
| 1596 | } |
| 1597 | } |
| 1598 | ipstat_inc(ips_cantfrag); |
| 1599 | if (destmtu == 0) |
| 1600 | goto freecopy; |
| 1601 | break; |
| 1602 | |
| 1603 | case EACCES13: |
| 1604 | /* |
| 1605 | * pf(4) blocked the packet. There is no need to send an ICMP |
| 1606 | * packet back since pf(4) takes care of it. |
| 1607 | */ |
| 1608 | goto freecopy; |
| 1609 | |
| 1610 | case ENOBUFS55: |
| 1611 | /* |
| 1612 | * a router should not generate ICMP_SOURCEQUENCH as |
| 1613 | * required in RFC1812 Requirements for IP Version 4 Routers. |
| 1614 | * source quench could be a big problem under DoS attacks, |
| 1615 | * or the underlying interface is rate-limited. |
| 1616 | */ |
| 1617 | goto freecopy; |
| 1618 | |
| 1619 | case ENETUNREACH51: /* shouldn't happen, checked above */ |
| 1620 | case EHOSTUNREACH65: |
| 1621 | case ENETDOWN50: |
| 1622 | case EHOSTDOWN64: |
| 1623 | default: |
| 1624 | type = ICMP_UNREACH3; |
| 1625 | code = ICMP_UNREACH_HOST1; |
| 1626 | break; |
| 1627 | } |
| 1628 | mcopy = m_copym(&mfake, 0, len, M_DONTWAIT0x0002); |
| 1629 | if (mcopy) |
| 1630 | icmp_error(mcopy, type, code, dest, destmtu); |
| 1631 | |
| 1632 | freecopy: |
| 1633 | if (fake) |
| 1634 | m_tag_delete_chain(&mfake); |
| 1635 | rtfree(rt); |
| 1636 | } |
| 1637 | |
| 1638 | int |
| 1639 | ip_sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, |
| 1640 | size_t newlen) |
| 1641 | { |
| 1642 | int error; |
| 1643 | #ifdef MROUTING1 |
| 1644 | extern struct mrtstat mrtstat; |
| 1645 | #endif |
| 1646 | |
| 1647 | /* Almost all sysctl names at this level are terminal. */ |
| 1648 | if (namelen != 1 && name[0] != IPCTL_IFQUEUE30 && |
| 1649 | name[0] != IPCTL_ARPQUEUE41) |
| 1650 | return (ENOTDIR20); |
| 1651 | |
| 1652 | switch (name[0]) { |
| 1653 | case IPCTL_SOURCEROUTE5: |
| 1654 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 1655 | error = sysctl_securelevel_int(oldp, oldlenp, newp, newlen, |
| 1656 | &ip_dosourceroute); |
| 1657 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 1658 | return (error); |
| 1659 | case IPCTL_MTUDISC27: |
| 1660 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 1661 | error = sysctl_int(oldp, oldlenp, newp, newlen, &ip_mtudisc); |
| 1662 | if (ip_mtudisc == 0) |
| 1663 | rt_timer_queue_flush(&ip_mtudisc_timeout_q); |
| 1664 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 1665 | return error; |
| 1666 | case IPCTL_MTUDISCTIMEOUT28: |
| 1667 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 1668 | error = sysctl_int_bounded(oldp, oldlenp, newp, newlen, |
| 1669 | &ip_mtudisc_timeout, 0, INT_MAX0x7fffffff); |
| 1670 | rt_timer_queue_change(&ip_mtudisc_timeout_q, |
| 1671 | ip_mtudisc_timeout); |
| 1672 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 1673 | return (error); |
| 1674 | #ifdef IPSEC1 |
| 1675 | case IPCTL_ENCDEBUG12: |
| 1676 | case IPCTL_IPSEC_STATS13: |
| 1677 | case IPCTL_IPSEC_EXPIRE_ACQUIRE14: |
| 1678 | case IPCTL_IPSEC_EMBRYONIC_SA_TIMEOUT15: |
| 1679 | case IPCTL_IPSEC_REQUIRE_PFS16: |
| 1680 | case IPCTL_IPSEC_SOFT_ALLOCATIONS17: |
| 1681 | case IPCTL_IPSEC_ALLOCATIONS18: |
| 1682 | case IPCTL_IPSEC_SOFT_BYTES19: |
| 1683 | case IPCTL_IPSEC_BYTES20: |
| 1684 | case IPCTL_IPSEC_TIMEOUT21: |
| 1685 | case IPCTL_IPSEC_SOFT_TIMEOUT22: |
| 1686 | case IPCTL_IPSEC_SOFT_FIRSTUSE23: |
| 1687 | case IPCTL_IPSEC_FIRSTUSE24: |
| 1688 | case IPCTL_IPSEC_ENC_ALGORITHM25: |
| 1689 | case IPCTL_IPSEC_AUTH_ALGORITHM26: |
| 1690 | case IPCTL_IPSEC_IPCOMP_ALGORITHM29: |
| 1691 | return (ipsec_sysctl(name, namelen, oldp, oldlenp, newp, |
| 1692 | newlen)); |
| 1693 | #endif |
| 1694 | case IPCTL_IFQUEUE30: |
| 1695 | return (sysctl_niq(name + 1, namelen - 1,sysctl_mq((name + 1), (namelen - 1), (oldp), (oldlenp), (newp ), (newlen), &(&ipintrq)->ni_q) |
| 1696 | oldp, oldlenp, newp, newlen, &ipintrq)sysctl_mq((name + 1), (namelen - 1), (oldp), (oldlenp), (newp ), (newlen), &(&ipintrq)->ni_q)); |
| 1697 | case IPCTL_ARPQUEUE41: |
| 1698 | return (sysctl_niq(name + 1, namelen - 1,sysctl_mq((name + 1), (namelen - 1), (oldp), (oldlenp), (newp ), (newlen), &(&arpinq)->ni_q) |
| 1699 | oldp, oldlenp, newp, newlen, &arpinq)sysctl_mq((name + 1), (namelen - 1), (oldp), (oldlenp), (newp ), (newlen), &(&arpinq)->ni_q)); |
| 1700 | case IPCTL_ARPQUEUED36: |
| 1701 | return (sysctl_rdint(oldp, oldlenp, newp, |
| 1702 | atomic_load_int(&la_hold_total))); |
| 1703 | case IPCTL_STATS33: |
| 1704 | return (ip_sysctl_ipstat(oldp, oldlenp, newp)); |
| 1705 | #ifdef MROUTING1 |
| 1706 | case IPCTL_MRTSTATS35: |
| 1707 | return (sysctl_rdstruct(oldp, oldlenp, newp, |
| 1708 | &mrtstat, sizeof(mrtstat))); |
| 1709 | case IPCTL_MRTMFC37: |
| 1710 | if (newp) |
| 1711 | return (EPERM1); |
| 1712 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 1713 | error = mrt_sysctl_mfc(oldp, oldlenp); |
| 1714 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 1715 | return (error); |
| 1716 | case IPCTL_MRTVIF38: |
| 1717 | if (newp) |
| 1718 | return (EPERM1); |
| 1719 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 1720 | error = mrt_sysctl_vif(oldp, oldlenp); |
| 1721 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 1722 | return (error); |
| 1723 | #else |
| 1724 | case IPCTL_MRTPROTO34: |
| 1725 | case IPCTL_MRTSTATS35: |
| 1726 | case IPCTL_MRTMFC37: |
| 1727 | case IPCTL_MRTVIF38: |
| 1728 | return (EOPNOTSUPP45); |
| 1729 | #endif |
| 1730 | default: |
| 1731 | NET_LOCK()do { rw_enter_write(&netlock); } while (0); |
| 1732 | error = sysctl_bounded_arr(ipctl_vars, nitems(ipctl_vars)(sizeof((ipctl_vars)) / sizeof((ipctl_vars)[0])), |
| 1733 | name, namelen, oldp, oldlenp, newp, newlen); |
| 1734 | NET_UNLOCK()do { rw_exit_write(&netlock); } while (0); |
| 1735 | return (error); |
| 1736 | } |
| 1737 | /* NOTREACHED */ |
| 1738 | } |
| 1739 | |
| 1740 | int |
| 1741 | ip_sysctl_ipstat(void *oldp, size_t *oldlenp, void *newp) |
| 1742 | { |
| 1743 | uint64_t counters[ips_ncounters]; |
| 1744 | struct ipstat ipstat; |
| 1745 | u_long *words = (u_long *)&ipstat; |
| 1746 | int i; |
| 1747 | |
| 1748 | CTASSERT(sizeof(ipstat) == (nitems(counters) * sizeof(u_long)))extern char _ctassert[(sizeof(ipstat) == ((sizeof((counters)) / sizeof((counters)[0])) * sizeof(u_long))) ? 1 : -1 ] __attribute__ ((__unused__)); |
| 1749 | memset(&ipstat, 0, sizeof ipstat)__builtin_memset((&ipstat), (0), (sizeof ipstat)); |
| 1750 | counters_read(ipcounters, counters, nitems(counters)(sizeof((counters)) / sizeof((counters)[0])), NULL((void *)0)); |
| 1751 | |
| 1752 | for (i = 0; i < nitems(counters)(sizeof((counters)) / sizeof((counters)[0])); i++) |
| 1753 | words[i] = (u_long)counters[i]; |
| 1754 | |
| 1755 | return (sysctl_rdstruct(oldp, oldlenp, newp, &ipstat, sizeof(ipstat))); |
| 1756 | } |
| 1757 | |
| 1758 | void |
| 1759 | ip_savecontrol(struct inpcb *inp, struct mbuf **mp, struct ip *ip, |
| 1760 | struct mbuf *m) |
| 1761 | { |
| 1762 | if (inp->inp_socket->so_options & SO_TIMESTAMP0x0800) { |
| 1763 | struct timeval tv; |
| 1764 | |
| 1765 | m_microtime(m, &tv); |
| 1766 | *mp = sbcreatecontrol((caddr_t) &tv, sizeof(tv), |
| 1767 | SCM_TIMESTAMP0x04, SOL_SOCKET0xffff); |
| 1768 | if (*mp) |
| 1769 | mp = &(*mp)->m_nextm_hdr.mh_next; |
| 1770 | } |
| 1771 | |
| 1772 | if (inp->inp_flags & INP_RECVDSTADDR0x004) { |
| 1773 | *mp = sbcreatecontrol((caddr_t) &ip->ip_dst, |
| 1774 | sizeof(struct in_addr), IP_RECVDSTADDR7, IPPROTO_IP0); |
| 1775 | if (*mp) |
| 1776 | mp = &(*mp)->m_nextm_hdr.mh_next; |
| 1777 | } |
| 1778 | #ifdef notyet |
| 1779 | /* this code is broken and will probably never be fixed. */ |
| 1780 | /* options were tossed already */ |
| 1781 | if (inp->inp_flags & INP_RECVOPTS0x001) { |
| 1782 | *mp = sbcreatecontrol((caddr_t) opts_deleted_above, |
| 1783 | sizeof(struct in_addr), IP_RECVOPTS5, IPPROTO_IP0); |
| 1784 | if (*mp) |
| 1785 | mp = &(*mp)->m_nextm_hdr.mh_next; |
| 1786 | } |
| 1787 | /* ip_srcroute doesn't do what we want here, need to fix */ |
| 1788 | if (inp->inp_flags & INP_RECVRETOPTS0x002) { |
| 1789 | *mp = sbcreatecontrol((caddr_t) ip_srcroute(m), |
| 1790 | sizeof(struct in_addr), IP_RECVRETOPTS6, IPPROTO_IP0); |
| 1791 | if (*mp) |
| 1792 | mp = &(*mp)->m_nextm_hdr.mh_next; |
| 1793 | } |
| 1794 | #endif |
| 1795 | if (inp->inp_flags & INP_RECVIF0x080) { |
| 1796 | struct sockaddr_dl sdl; |
| 1797 | struct ifnet *ifp; |
| 1798 | |
| 1799 | ifp = if_get(m->m_pkthdrM_dat.MH.MH_pkthdr.ph_ifidx); |
| 1800 | if (ifp == NULL((void *)0) || ifp->if_sadl == NULL((void *)0)) { |
| 1801 | memset(&sdl, 0, sizeof(sdl))__builtin_memset((&sdl), (0), (sizeof(sdl))); |
| 1802 | sdl.sdl_len = offsetof(struct sockaddr_dl, sdl_data[0])__builtin_offsetof(struct sockaddr_dl, sdl_data[0]); |
| 1803 | sdl.sdl_family = AF_LINK18; |
| 1804 | sdl.sdl_index = ifp != NULL((void *)0) ? ifp->if_index : 0; |
| 1805 | sdl.sdl_nlen = sdl.sdl_alen = sdl.sdl_slen = 0; |
| 1806 | *mp = sbcreatecontrol((caddr_t) &sdl, sdl.sdl_len, |
| 1807 | IP_RECVIF30, IPPROTO_IP0); |
| 1808 | } else { |
| 1809 | *mp = sbcreatecontrol((caddr_t) ifp->if_sadl, |
| 1810 | ifp->if_sadl->sdl_len, IP_RECVIF30, IPPROTO_IP0); |
| 1811 | } |
| 1812 | if (*mp) |
| 1813 | mp = &(*mp)->m_nextm_hdr.mh_next; |
| 1814 | if_put(ifp); |
| 1815 | } |
| 1816 | if (inp->inp_flags & INP_RECVTTL0x040) { |
| 1817 | *mp = sbcreatecontrol((caddr_t) &ip->ip_ttl, |
| 1818 | sizeof(u_int8_t), IP_RECVTTL31, IPPROTO_IP0); |
| 1819 | if (*mp) |
| 1820 | mp = &(*mp)->m_nextm_hdr.mh_next; |
| 1821 | } |
| 1822 | if (inp->inp_flags & INP_RECVRTABLE0x400) { |
| 1823 | u_int rtableid = inp->inp_rtableid; |
| 1824 | |
| 1825 | #if NPF1 > 0 |
| 1826 | if (m && m->m_pkthdrM_dat.MH.MH_pkthdr.pf.flags & PF_TAG_DIVERTED0x08) { |
| 1827 | struct pf_divert *divert; |
| 1828 | |
| 1829 | divert = pf_find_divert(m); |
| 1830 | KASSERT(divert != NULL)((divert != ((void *)0)) ? (void)0 : __assert("diagnostic ", "/usr/src/sys/netinet/ip_input.c" , 1830, "divert != NULL")); |
| 1831 | rtableid = divert->rdomain; |
| 1832 | } |
| 1833 | #endif |
| 1834 | |
| 1835 | *mp = sbcreatecontrol((caddr_t) &rtableid, |
| 1836 | sizeof(u_int), IP_RECVRTABLE35, IPPROTO_IP0); |
| 1837 | if (*mp) |
| 1838 | mp = &(*mp)->m_nextm_hdr.mh_next; |
Value stored to 'mp' is never read | |
| 1839 | } |
| 1840 | } |
| 1841 | |
| 1842 | void |
| 1843 | ip_send_do_dispatch(void *xmq, int flags) |
| 1844 | { |
| 1845 | struct mbuf_queue *mq = xmq; |
| 1846 | struct mbuf *m; |
| 1847 | struct mbuf_list ml; |
| 1848 | struct m_tag *mtag; |
| 1849 | |
| 1850 | mq_delist(mq, &ml); |
| 1851 | if (ml_empty(&ml)((&ml)->ml_len == 0)) |
| 1852 | return; |
| 1853 | |
| 1854 | NET_LOCK_SHARED()do { rw_enter_read(&netlock); } while (0); |
| 1855 | while ((m = ml_dequeue(&ml)) != NULL((void *)0)) { |
| 1856 | u_int32_t ipsecflowinfo = 0; |
| 1857 | |
| 1858 | if ((mtag = m_tag_find(m, PACKET_TAG_IPSEC_FLOWINFO0x0004, NULL((void *)0))) |
| 1859 | != NULL((void *)0)) { |
| 1860 | ipsecflowinfo = *(u_int32_t *)(mtag + 1); |
| 1861 | m_tag_delete(m, mtag); |
| 1862 | } |
| 1863 | ip_output(m, NULL((void *)0), NULL((void *)0), flags, NULL((void *)0), NULL((void *)0), ipsecflowinfo); |
| 1864 | } |
| 1865 | NET_UNLOCK_SHARED()do { rw_exit_read(&netlock); } while (0); |
| 1866 | } |
| 1867 | |
| 1868 | void |
| 1869 | ip_sendraw_dispatch(void *xmq) |
| 1870 | { |
| 1871 | ip_send_do_dispatch(xmq, IP_RAWOUTPUT0x2); |
| 1872 | } |
| 1873 | |
| 1874 | void |
| 1875 | ip_send_dispatch(void *xmq) |
| 1876 | { |
| 1877 | ip_send_do_dispatch(xmq, 0); |
| 1878 | } |
| 1879 | |
| 1880 | void |
| 1881 | ip_send(struct mbuf *m) |
| 1882 | { |
| 1883 | mq_enqueue(&ipsend_mq, m); |
| 1884 | task_add(net_tq(0), &ipsend_task); |
| 1885 | } |
| 1886 | |
| 1887 | void |
| 1888 | ip_send_raw(struct mbuf *m) |
| 1889 | { |
| 1890 | mq_enqueue(&ipsendraw_mq, m); |
| 1891 | task_add(net_tq(0), &ipsendraw_task); |
| 1892 | } |