| File: | src/usr.bin/bgplg/traceroute/../../../usr.sbin/traceroute/worker.c |
| Warning: | line 248, column 7 Value stored to 'exthdr_size' is never read |
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| 1 | /* $OpenBSD: worker.c,v 1.8 2021/09/03 09:13:00 florian Exp $ */ |
| 2 | /* $NetBSD: traceroute.c,v 1.10 1995/05/21 15:50:45 mycroft Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the project nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | /*- |
| 34 | * Copyright (c) 1990, 1993 |
| 35 | * The Regents of the University of California. All rights reserved. |
| 36 | * |
| 37 | * This code is derived from software contributed to Berkeley by |
| 38 | * Van Jacobson. |
| 39 | * |
| 40 | * Redistribution and use in source and binary forms, with or without |
| 41 | * modification, are permitted provided that the following conditions |
| 42 | * are met: |
| 43 | * 1. Redistributions of source code must retain the above copyright |
| 44 | * notice, this list of conditions and the following disclaimer. |
| 45 | * 2. Redistributions in binary form must reproduce the above copyright |
| 46 | * notice, this list of conditions and the following disclaimer in the |
| 47 | * documentation and/or other materials provided with the distribution. |
| 48 | * 3. Neither the name of the University nor the names of its contributors |
| 49 | * may be used to endorse or promote products derived from this software |
| 50 | * without specific prior written permission. |
| 51 | * |
| 52 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 53 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 54 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 55 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 56 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 57 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 58 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 59 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 60 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 61 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 62 | * SUCH DAMAGE. |
| 63 | */ |
| 64 | |
| 65 | #include <sys/types.h> |
| 66 | #include <sys/socket.h> |
| 67 | #include <sys/time.h> |
| 68 | #include <sys/uio.h> |
| 69 | |
| 70 | #include <netinet/in.h> |
| 71 | #include <netinet/ip.h> |
| 72 | #include <netinet/ip6.h> |
| 73 | #include <netinet/ip_icmp.h> |
| 74 | #include <netinet/icmp6.h> |
| 75 | #include <netinet/udp.h> |
| 76 | |
| 77 | #include <arpa/inet.h> |
| 78 | #include <arpa/nameser.h> |
| 79 | |
| 80 | #include <asr.h> |
| 81 | #include <err.h> |
| 82 | #include <event.h> |
| 83 | #include <limits.h> |
| 84 | #include <netdb.h> |
| 85 | #include <stdio.h> |
| 86 | #include <stdlib.h> |
| 87 | #include <string.h> |
| 88 | #include <time.h> |
| 89 | #include <unistd.h> |
| 90 | |
| 91 | #include "traceroute.h" |
| 92 | |
| 93 | void build_probe4(struct tr_conf *, int, u_int8_t); |
| 94 | void build_probe6(struct tr_conf *, int, u_int8_t, |
| 95 | struct sockaddr *); |
| 96 | int packet_ok4(struct tr_conf *, struct msghdr *, int, int *); |
| 97 | int packet_ok6(struct tr_conf *, struct msghdr *, int, int *); |
| 98 | void icmp4_code(int, int *, int *, struct tr_result *); |
| 99 | void icmp6_code(int, int *, int *, struct tr_result *); |
| 100 | struct udphdr *get_udphdr(struct tr_conf *, struct ip6_hdr *, u_char *); |
| 101 | void dump_packet(void); |
| 102 | void print_asn(struct sockaddr_storage *, struct tr_result *); |
| 103 | u_short in_cksum(u_short *, int); |
| 104 | char *pr_type(u_int8_t); |
| 105 | double deltaT(struct timeval *, struct timeval *); |
| 106 | void check_timeout(struct tr_result *, struct tr_conf *); |
| 107 | void print_result_row(struct tr_result *, struct tr_conf *); |
| 108 | void getnameinfo_async_done(struct asr_result *, void *); |
| 109 | void getrrsetbyname_async_done(struct asr_result *, void *); |
| 110 | |
| 111 | void |
| 112 | print_exthdr(u_char *buf, int cc, struct tr_result *tr_res) |
| 113 | { |
| 114 | struct icmp_ext_hdr exthdr; |
| 115 | struct icmp_ext_obj_hdr objhdr; |
| 116 | struct ip *ip; |
| 117 | struct icmp *icp; |
| 118 | size_t exthdr_size, len; |
| 119 | int hlen, first; |
| 120 | u_int32_t label; |
| 121 | u_int16_t off, olen; |
| 122 | u_int8_t type; |
| 123 | char *exthdr_str; |
| 124 | |
| 125 | ip = (struct ip *)buf; |
| 126 | hlen = ip->ip_hl << 2; |
| 127 | if (cc < hlen + ICMP_MINLEN8) |
| 128 | return; |
| 129 | icp = (struct icmp *)(buf + hlen); |
| 130 | cc -= hlen + ICMP_MINLEN8; |
| 131 | buf += hlen + ICMP_MINLEN8; |
| 132 | |
| 133 | type = icp->icmp_type; |
| 134 | if (type != ICMP_TIMXCEED11 && type != ICMP_UNREACH3 && |
| 135 | type != ICMP_PARAMPROB12) |
| 136 | /* Wrong ICMP type for extension */ |
| 137 | return; |
| 138 | |
| 139 | off = icp->icmp_lengthicmp_hun.ih_exthdr.iex_length * sizeof(u_int32_t); |
| 140 | if (off == 0) |
| 141 | /* |
| 142 | * rfc 4884 Section 5.5: traceroute MUST try to parse |
| 143 | * broken ext headers. Again IETF bent over to please |
| 144 | * idotic corporations. |
| 145 | */ |
| 146 | off = ICMP_EXT_OFFSET128; |
| 147 | else if (off < ICMP_EXT_OFFSET128) |
| 148 | /* rfc 4884 requires an offset of at least 128 bytes */ |
| 149 | return; |
| 150 | |
| 151 | /* make sure that at least one extension is present */ |
| 152 | if (cc < off + sizeof(exthdr) + sizeof(objhdr)) |
| 153 | /* Not enough space for ICMP extensions */ |
| 154 | return; |
| 155 | |
| 156 | cc -= off; |
| 157 | buf += off; |
| 158 | memcpy(&exthdr, buf, sizeof(exthdr)); |
| 159 | |
| 160 | /* verify version */ |
| 161 | if ((exthdr.ieh_version & ICMP_EXT_HDR_VMASK0xf0) != ICMP_EXT_HDR_VERSION0x20) |
| 162 | return; |
| 163 | |
| 164 | /* verify checksum */ |
| 165 | if (exthdr.ieh_cksum && in_cksum((u_short *)buf, cc)) |
| 166 | return; |
| 167 | |
| 168 | buf += sizeof(exthdr); |
| 169 | cc -= sizeof(exthdr); |
| 170 | |
| 171 | /* rough estimate of needed space */ |
| 172 | exthdr_size = sizeof("[MPLS Label 1048576 (Exp 3)]") * |
| 173 | (cc / sizeof(u_int32_t)); |
| 174 | if ((tr_res->exthdr = calloc(1, exthdr_size)) == NULL((void *)0)) |
| 175 | err(1, NULL((void *)0)); |
| 176 | exthdr_str = tr_res->exthdr; |
| 177 | |
| 178 | while (cc > sizeof(objhdr)) { |
| 179 | memcpy(&objhdr, buf, sizeof(objhdr)); |
| 180 | olen = ntohs(objhdr.ieo_length)(__uint16_t)(__builtin_constant_p(objhdr.ieo_length) ? (__uint16_t )(((__uint16_t)(objhdr.ieo_length) & 0xffU) << 8 | ( (__uint16_t)(objhdr.ieo_length) & 0xff00U) >> 8) : __swap16md (objhdr.ieo_length)); |
| 181 | |
| 182 | /* Sanity check the length field */ |
| 183 | if (olen < sizeof(objhdr) || olen > cc) |
| 184 | return; |
| 185 | |
| 186 | cc -= olen; |
| 187 | |
| 188 | /* Move past the object header */ |
| 189 | buf += sizeof(objhdr); |
| 190 | olen -= sizeof(objhdr); |
| 191 | |
| 192 | switch (objhdr.ieo_cnum) { |
| 193 | case ICMP_EXT_MPLS1: |
| 194 | /* RFC 4950: ICMP Extensions for MPLS */ |
| 195 | switch (objhdr.ieo_ctype) { |
| 196 | case 1: |
| 197 | first = 0; |
| 198 | while (olen >= sizeof(u_int32_t)) { |
| 199 | memcpy(&label, buf, sizeof(u_int32_t)); |
| 200 | label = htonl(label)(__uint32_t)(__builtin_constant_p(label) ? (__uint32_t)(((__uint32_t )(label) & 0xff) << 24 | ((__uint32_t)(label) & 0xff00) << 8 | ((__uint32_t)(label) & 0xff0000) >> 8 | ((__uint32_t)(label) & 0xff000000) >> 24) : __swap32md (label)); |
| 201 | buf += sizeof(u_int32_t); |
| 202 | olen -= sizeof(u_int32_t); |
| 203 | |
| 204 | if (first == 0) { |
| 205 | len = snprintf(exthdr_str, |
| 206 | exthdr_size, "%s", |
| 207 | " [MPLS Label "); |
| 208 | if (len != -1 && len < |
| 209 | exthdr_size) { |
| 210 | exthdr_str += len; |
| 211 | exthdr_size -= len; |
| 212 | } |
| 213 | first++; |
| 214 | } else { |
| 215 | len = snprintf(exthdr_str, |
| 216 | exthdr_size, "%s", |
| 217 | ", "); |
| 218 | if (len != -1 && len < |
| 219 | exthdr_size) { |
| 220 | exthdr_str += len; |
| 221 | exthdr_size -= len; |
| 222 | } |
| 223 | } |
| 224 | len = snprintf(exthdr_str, |
| 225 | exthdr_size, |
| 226 | "%d", MPLS_LABEL(label)((label & ((u_int32_t)(0xfffff000U))) >> 12)); |
| 227 | if (len != -1 && len < exthdr_size) { |
| 228 | exthdr_str += len; |
| 229 | exthdr_size -= len; |
| 230 | } |
| 231 | if (MPLS_EXP(label)((label & ((u_int32_t)(0x00000e00U))) >> 9)) { |
| 232 | len = snprintf(exthdr_str, |
| 233 | exthdr_size, " (Exp %x)", |
| 234 | MPLS_EXP(label)((label & ((u_int32_t)(0x00000e00U))) >> 9)); |
| 235 | if (len != -1 && len < |
| 236 | exthdr_size) { |
| 237 | exthdr_str += len; |
| 238 | exthdr_size -= len; |
| 239 | } |
| 240 | } |
| 241 | } |
| 242 | if (olen > 0) { |
| 243 | len = snprintf(exthdr_str, |
| 244 | exthdr_size, "%s", "|]"); |
| 245 | if (len != -1 && len < |
| 246 | exthdr_size) { |
| 247 | exthdr_str += len; |
| 248 | exthdr_size -= len; |
Value stored to 'exthdr_size' is never read | |
| 249 | } |
| 250 | return; |
| 251 | } |
| 252 | if (first != 0) { |
| 253 | len = snprintf(exthdr_str, |
| 254 | exthdr_size, "%s", "]"); |
| 255 | if (len != -1 && len < |
| 256 | exthdr_size) { |
| 257 | exthdr_str += len; |
| 258 | exthdr_size -= len; |
| 259 | } |
| 260 | } |
| 261 | break; |
| 262 | default: |
| 263 | buf += olen; |
| 264 | break; |
| 265 | } |
| 266 | break; |
| 267 | case ICMP_EXT_IFINFO2: |
| 268 | default: |
| 269 | buf += olen; |
| 270 | break; |
| 271 | } |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | void |
| 276 | check_tos(struct ip *ip, int *last_tos, struct tr_result *tr_res) |
| 277 | { |
| 278 | struct icmp *icp; |
| 279 | struct ip *inner_ip; |
| 280 | |
| 281 | icp = (struct icmp *) (((u_char *)ip)+(ip->ip_hl<<2)); |
| 282 | inner_ip = (struct ip *) (((u_char *)icp)+8); |
| 283 | |
| 284 | if (inner_ip->ip_tos != *last_tos) |
| 285 | snprintf(tr_res->tos, sizeof(tr_res->tos), |
| 286 | " (TOS=%d!)", inner_ip->ip_tos); |
| 287 | |
| 288 | *last_tos = inner_ip->ip_tos; |
| 289 | } |
| 290 | |
| 291 | void |
| 292 | dump_packet(void) |
| 293 | { |
| 294 | u_char *p; |
| 295 | int i; |
| 296 | |
| 297 | fprintf(stderr(&__sF[2]), "packet data:"); |
| 298 | for (p = outpacket, i = 0; i < datalen; i++) { |
| 299 | if ((i % 24) == 0) |
| 300 | fprintf(stderr(&__sF[2]), "\n "); |
| 301 | fprintf(stderr(&__sF[2]), " %02x", *p++); |
| 302 | } |
| 303 | fprintf(stderr(&__sF[2]), "\n"); |
| 304 | } |
| 305 | |
| 306 | void |
| 307 | build_probe4(struct tr_conf *conf, int seq, u_int8_t ttl) |
| 308 | { |
| 309 | struct ip *ip = (struct ip *)outpacket; |
| 310 | u_char *p = (u_char *)(ip + 1); |
| 311 | struct udphdr *up = (struct udphdr *)(p + conf->lsrrlen); |
| 312 | struct icmp *icmpp = (struct icmp *)(p + conf->lsrrlen); |
| 313 | struct packetdata *op; |
| 314 | struct timeval tv; |
| 315 | |
| 316 | ip->ip_len = htons(datalen)(__uint16_t)(__builtin_constant_p(datalen) ? (__uint16_t)(((__uint16_t )(datalen) & 0xffU) << 8 | ((__uint16_t)(datalen) & 0xff00U) >> 8) : __swap16md(datalen)); |
| 317 | ip->ip_ttl = ttl; |
| 318 | ip->ip_id = htons(conf->ident+seq)(__uint16_t)(__builtin_constant_p(conf->ident+seq) ? (__uint16_t )(((__uint16_t)(conf->ident+seq) & 0xffU) << 8 | ((__uint16_t)(conf->ident+seq) & 0xff00U) >> 8) : __swap16md(conf->ident+seq)); |
| 319 | |
| 320 | switch (conf->proto) { |
| 321 | case IPPROTO_ICMP1: |
| 322 | icmpp->icmp_type = ICMP_ECHO8; |
| 323 | icmpp->icmp_code = ICMP_CODE0;; |
| 324 | icmpp->icmp_seqicmp_hun.ih_idseq.icd_seq = htons(seq)(__uint16_t)(__builtin_constant_p(seq) ? (__uint16_t)(((__uint16_t )(seq) & 0xffU) << 8 | ((__uint16_t)(seq) & 0xff00U ) >> 8) : __swap16md(seq)); |
| 325 | icmpp->icmp_idicmp_hun.ih_idseq.icd_id = htons(conf->ident)(__uint16_t)(__builtin_constant_p(conf->ident) ? (__uint16_t )(((__uint16_t)(conf->ident) & 0xffU) << 8 | ((__uint16_t )(conf->ident) & 0xff00U) >> 8) : __swap16md(conf ->ident)); |
| 326 | op = (struct packetdata *)(icmpp + 1); |
| 327 | break; |
| 328 | case IPPROTO_UDP17: |
| 329 | up->uh_sport = htons(conf->ident)(__uint16_t)(__builtin_constant_p(conf->ident) ? (__uint16_t )(((__uint16_t)(conf->ident) & 0xffU) << 8 | ((__uint16_t )(conf->ident) & 0xff00U) >> 8) : __swap16md(conf ->ident)); |
| 330 | up->uh_dport = htons(conf->port+seq)(__uint16_t)(__builtin_constant_p(conf->port+seq) ? (__uint16_t )(((__uint16_t)(conf->port+seq) & 0xffU) << 8 | ( (__uint16_t)(conf->port+seq) & 0xff00U) >> 8) : __swap16md (conf->port+seq)); |
| 331 | up->uh_ulen = htons((u_short)(datalen - sizeof(struct ip) -(__uint16_t)(__builtin_constant_p((u_short)(datalen - sizeof( struct ip) - conf->lsrrlen)) ? (__uint16_t)(((__uint16_t)( (u_short)(datalen - sizeof(struct ip) - conf->lsrrlen)) & 0xffU) << 8 | ((__uint16_t)((u_short)(datalen - sizeof (struct ip) - conf->lsrrlen)) & 0xff00U) >> 8) : __swap16md((u_short)(datalen - sizeof(struct ip) - conf-> lsrrlen))) |
| 332 | conf->lsrrlen))(__uint16_t)(__builtin_constant_p((u_short)(datalen - sizeof( struct ip) - conf->lsrrlen)) ? (__uint16_t)(((__uint16_t)( (u_short)(datalen - sizeof(struct ip) - conf->lsrrlen)) & 0xffU) << 8 | ((__uint16_t)((u_short)(datalen - sizeof (struct ip) - conf->lsrrlen)) & 0xff00U) >> 8) : __swap16md((u_short)(datalen - sizeof(struct ip) - conf-> lsrrlen))); |
| 333 | up->uh_sum = 0; |
| 334 | op = (struct packetdata *)(up + 1); |
| 335 | break; |
| 336 | default: |
| 337 | op = (struct packetdata *)(ip + 1); |
| 338 | break; |
| 339 | } |
| 340 | op->seq = seq; |
| 341 | op->ttl = ttl; |
| 342 | gettime(&tv); |
| 343 | |
| 344 | /* |
| 345 | * We don't want hostiles snooping the net to get any useful |
| 346 | * information about us. Send the timestamp in network byte order, |
| 347 | * and perturb the timestamp enough that they won't know our |
| 348 | * real clock ticker. We don't want to perturb the time by too |
| 349 | * much: being off by a suspiciously large amount might indicate |
| 350 | * OpenBSD. |
| 351 | * |
| 352 | * The timestamps in the packet are currently unused. If future |
| 353 | * work wants to use them they will have to subtract out the |
| 354 | * perturbation first. |
| 355 | */ |
| 356 | gettime(&tv); |
| 357 | op->sec = htonl(tv.tv_sec + sec_perturb)(__uint32_t)(__builtin_constant_p(tv.tv_sec + sec_perturb) ? ( __uint32_t)(((__uint32_t)(tv.tv_sec + sec_perturb) & 0xff ) << 24 | ((__uint32_t)(tv.tv_sec + sec_perturb) & 0xff00 ) << 8 | ((__uint32_t)(tv.tv_sec + sec_perturb) & 0xff0000 ) >> 8 | ((__uint32_t)(tv.tv_sec + sec_perturb) & 0xff000000 ) >> 24) : __swap32md(tv.tv_sec + sec_perturb)); |
| 358 | op->usec = htonl((tv.tv_usec + usec_perturb) % 1000000)(__uint32_t)(__builtin_constant_p((tv.tv_usec + usec_perturb) % 1000000) ? (__uint32_t)(((__uint32_t)((tv.tv_usec + usec_perturb ) % 1000000) & 0xff) << 24 | ((__uint32_t)((tv.tv_usec + usec_perturb) % 1000000) & 0xff00) << 8 | ((__uint32_t )((tv.tv_usec + usec_perturb) % 1000000) & 0xff0000) >> 8 | ((__uint32_t)((tv.tv_usec + usec_perturb) % 1000000) & 0xff000000) >> 24) : __swap32md((tv.tv_usec + usec_perturb ) % 1000000)); |
| 359 | |
| 360 | if (conf->proto == IPPROTO_ICMP1) { |
| 361 | icmpp->icmp_cksum = 0; |
| 362 | icmpp->icmp_cksum = in_cksum((u_short *)icmpp, |
| 363 | datalen - sizeof(struct ip) - conf->lsrrlen); |
| 364 | if (icmpp->icmp_cksum == 0) |
| 365 | icmpp->icmp_cksum = 0xffff; |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | void |
| 370 | build_probe6(struct tr_conf *conf, int seq, u_int8_t hops, |
| 371 | struct sockaddr *to) |
| 372 | { |
| 373 | struct timeval tv; |
| 374 | struct packetdata *op; |
| 375 | int i; |
| 376 | |
| 377 | i = hops; |
| 378 | if (setsockopt(sndsock, IPPROTO_IPV641, IPV6_UNICAST_HOPS4, |
| 379 | (char *)&i, sizeof(i)) == -1) |
| 380 | warn("setsockopt IPV6_UNICAST_HOPS"); |
| 381 | |
| 382 | |
| 383 | ((struct sockaddr_in6*)to)->sin6_port = htons(conf->port + seq)(__uint16_t)(__builtin_constant_p(conf->port + seq) ? (__uint16_t )(((__uint16_t)(conf->port + seq) & 0xffU) << 8 | ((__uint16_t)(conf->port + seq) & 0xff00U) >> 8 ) : __swap16md(conf->port + seq)); |
| 384 | |
| 385 | gettime(&tv); |
| 386 | |
| 387 | if (conf->proto == IPPROTO_ICMP1) { |
| 388 | struct icmp6_hdr *icp = (struct icmp6_hdr *)outpacket; |
| 389 | |
| 390 | icp->icmp6_type = ICMP6_ECHO_REQUEST128; |
| 391 | icp->icmp6_code = 0; |
| 392 | icp->icmp6_cksum = 0; |
| 393 | icp->icmp6_idicmp6_dataun.icmp6_un_data16[0] = conf->ident; |
| 394 | icp->icmp6_seqicmp6_dataun.icmp6_un_data16[1] = htons(seq)(__uint16_t)(__builtin_constant_p(seq) ? (__uint16_t)(((__uint16_t )(seq) & 0xffU) << 8 | ((__uint16_t)(seq) & 0xff00U ) >> 8) : __swap16md(seq)); |
| 395 | op = (struct packetdata *)(outpacket + |
| 396 | sizeof(struct icmp6_hdr)); |
| 397 | } else |
| 398 | op = (struct packetdata *)outpacket; |
| 399 | op->seq = seq; |
| 400 | op->ttl = hops; |
| 401 | op->sec = htonl(tv.tv_sec)(__uint32_t)(__builtin_constant_p(tv.tv_sec) ? (__uint32_t)(( (__uint32_t)(tv.tv_sec) & 0xff) << 24 | ((__uint32_t )(tv.tv_sec) & 0xff00) << 8 | ((__uint32_t)(tv.tv_sec ) & 0xff0000) >> 8 | ((__uint32_t)(tv.tv_sec) & 0xff000000) >> 24) : __swap32md(tv.tv_sec)); |
| 402 | op->usec = htonl(tv.tv_usec)(__uint32_t)(__builtin_constant_p(tv.tv_usec) ? (__uint32_t)( ((__uint32_t)(tv.tv_usec) & 0xff) << 24 | ((__uint32_t )(tv.tv_usec) & 0xff00) << 8 | ((__uint32_t)(tv.tv_usec ) & 0xff0000) >> 8 | ((__uint32_t)(tv.tv_usec) & 0xff000000) >> 24) : __swap32md(tv.tv_usec)); |
| 403 | } |
| 404 | |
| 405 | void |
| 406 | send_probe(struct tr_conf *conf, int seq, u_int8_t ttl, struct sockaddr *to) |
| 407 | { |
| 408 | int i; |
| 409 | |
| 410 | switch (to->sa_family) { |
| 411 | case AF_INET2: |
| 412 | build_probe4(conf, seq, ttl); |
| 413 | break; |
| 414 | case AF_INET624: |
| 415 | build_probe6(conf, seq, ttl, to); |
| 416 | break; |
| 417 | default: |
| 418 | errx(1, "unsupported AF: %d", to->sa_family); |
| 419 | break; |
| 420 | } |
| 421 | |
| 422 | if (conf->dump) |
| 423 | dump_packet(); |
| 424 | |
| 425 | i = sendto(sndsock, outpacket, datalen, 0, to, to->sa_len); |
| 426 | if (i == -1 || i != datalen) { |
| 427 | if (i == -1) |
| 428 | warn("sendto"); |
| 429 | printf("%s: wrote %s %d chars, ret=%d\n", __progname, hostname, |
| 430 | datalen, i); |
| 431 | (void) fflush(stdout(&__sF[1])); |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | double |
| 436 | deltaT(struct timeval *t1p, struct timeval *t2p) |
| 437 | { |
| 438 | double dt; |
| 439 | |
| 440 | dt = (double)(t2p->tv_sec - t1p->tv_sec) * 1000.0 + |
| 441 | (double)(t2p->tv_usec - t1p->tv_usec) / 1000.0; |
| 442 | return (dt); |
| 443 | } |
| 444 | |
| 445 | static char *ttab[] = { |
| 446 | "Echo Reply", |
| 447 | "ICMP 1", |
| 448 | "ICMP 2", |
| 449 | "Dest Unreachable", |
| 450 | "Source Quench", |
| 451 | "Redirect", |
| 452 | "ICMP 6", |
| 453 | "ICMP 7", |
| 454 | "Echo", |
| 455 | "Router Advert", |
| 456 | "Router Solicit", |
| 457 | "Time Exceeded", |
| 458 | "Param Problem", |
| 459 | "Timestamp", |
| 460 | "Timestamp Reply", |
| 461 | "Info Request", |
| 462 | "Info Reply", |
| 463 | "Mask Request", |
| 464 | "Mask Reply" |
| 465 | }; |
| 466 | |
| 467 | /* |
| 468 | * Convert an ICMP "type" field to a printable string. |
| 469 | */ |
| 470 | char * |
| 471 | pr_type(u_int8_t t) |
| 472 | { |
| 473 | if (t > 18) |
| 474 | return ("OUT-OF-RANGE"); |
| 475 | return (ttab[t]); |
| 476 | } |
| 477 | |
| 478 | int |
| 479 | packet_ok(struct tr_conf *conf, int af, struct msghdr *mhdr, int cc, int *seq) |
| 480 | { |
| 481 | switch (af) { |
| 482 | case AF_INET2: |
| 483 | return packet_ok4(conf, mhdr, cc, seq); |
| 484 | break; |
| 485 | case AF_INET624: |
| 486 | return packet_ok6(conf, mhdr, cc, seq); |
| 487 | break; |
| 488 | default: |
| 489 | errx(1, "unsupported AF: %d", af); |
| 490 | break; |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | int |
| 495 | packet_ok4(struct tr_conf *conf, struct msghdr *mhdr, int cc, int *seq) |
| 496 | { |
| 497 | struct sockaddr_in *from = (struct sockaddr_in *)mhdr->msg_name; |
| 498 | struct icmp *icp; |
| 499 | u_char code; |
| 500 | char *buf = (char *)mhdr->msg_iov[0].iov_base; |
| 501 | u_int8_t type; |
| 502 | int hlen; |
| 503 | struct ip *ip; |
| 504 | |
| 505 | ip = (struct ip *) buf; |
| 506 | hlen = ip->ip_hl << 2; |
| 507 | if (cc < hlen + ICMP_MINLEN8) { |
| 508 | if (conf->verbose) |
| 509 | printf("packet too short (%d bytes) from %s\n", cc, |
| 510 | inet_ntoa(from->sin_addr)); |
| 511 | return (0); |
| 512 | } |
| 513 | cc -= hlen; |
| 514 | icp = (struct icmp *)(buf + hlen); |
| 515 | type = icp->icmp_type; |
| 516 | code = icp->icmp_code; |
| 517 | if ((type == ICMP_TIMXCEED11 && code == ICMP_TIMXCEED_INTRANS0) || |
| 518 | type == ICMP_UNREACH3 || type == ICMP_ECHOREPLY0) { |
| 519 | struct ip *hip; |
| 520 | struct udphdr *up; |
| 521 | struct icmp *icmpp; |
| 522 | |
| 523 | hip = &icp->icmp_ipicmp_dun.id_ip.idi_ip; |
| 524 | hlen = hip->ip_hl << 2; |
| 525 | |
| 526 | switch (conf->proto) { |
| 527 | case IPPROTO_ICMP1: |
| 528 | if (type == ICMP_ECHOREPLY0 && |
| 529 | icp->icmp_idicmp_hun.ih_idseq.icd_id == htons(conf->ident)(__uint16_t)(__builtin_constant_p(conf->ident) ? (__uint16_t )(((__uint16_t)(conf->ident) & 0xffU) << 8 | ((__uint16_t )(conf->ident) & 0xff00U) >> 8) : __swap16md(conf ->ident))) { |
| 530 | *seq = ntohs(icp->icmp_seq)(__uint16_t)(__builtin_constant_p(icp->icmp_hun.ih_idseq.icd_seq ) ? (__uint16_t)(((__uint16_t)(icp->icmp_hun.ih_idseq.icd_seq ) & 0xffU) << 8 | ((__uint16_t)(icp->icmp_hun.ih_idseq .icd_seq) & 0xff00U) >> 8) : __swap16md(icp->icmp_hun .ih_idseq.icd_seq)); |
| 531 | return (-2); /* we got there */ |
| 532 | } |
| 533 | icmpp = (struct icmp *)((u_char *)hip + hlen); |
| 534 | if (hlen + 8 <= cc && hip->ip_p == IPPROTO_ICMP1 && |
| 535 | icmpp->icmp_idicmp_hun.ih_idseq.icd_id == htons(conf->ident)(__uint16_t)(__builtin_constant_p(conf->ident) ? (__uint16_t )(((__uint16_t)(conf->ident) & 0xffU) << 8 | ((__uint16_t )(conf->ident) & 0xff00U) >> 8) : __swap16md(conf ->ident))) { |
| 536 | *seq = ntohs(icmpp->icmp_seq)(__uint16_t)(__builtin_constant_p(icmpp->icmp_hun.ih_idseq .icd_seq) ? (__uint16_t)(((__uint16_t)(icmpp->icmp_hun.ih_idseq .icd_seq) & 0xffU) << 8 | ((__uint16_t)(icmpp->icmp_hun .ih_idseq.icd_seq) & 0xff00U) >> 8) : __swap16md(icmpp ->icmp_hun.ih_idseq.icd_seq)); |
| 537 | return (type == ICMP_TIMXCEED11? -1 : code + 1); |
| 538 | } |
| 539 | break; |
| 540 | |
| 541 | case IPPROTO_UDP17: |
| 542 | up = (struct udphdr *)((u_char *)hip + hlen); |
| 543 | if (hlen + 12 <= cc && hip->ip_p == conf->proto && |
| 544 | up->uh_sport == htons(conf->ident)(__uint16_t)(__builtin_constant_p(conf->ident) ? (__uint16_t )(((__uint16_t)(conf->ident) & 0xffU) << 8 | ((__uint16_t )(conf->ident) & 0xff00U) >> 8) : __swap16md(conf ->ident))) { |
| 545 | *seq = ntohs(up->uh_dport)(__uint16_t)(__builtin_constant_p(up->uh_dport) ? (__uint16_t )(((__uint16_t)(up->uh_dport) & 0xffU) << 8 | (( __uint16_t)(up->uh_dport) & 0xff00U) >> 8) : __swap16md (up->uh_dport)) - conf->port; |
| 546 | return (type == ICMP_TIMXCEED11? -1 : code + 1); |
| 547 | } |
| 548 | break; |
| 549 | default: |
| 550 | /* this is some odd, user specified proto, |
| 551 | * how do we check it? |
| 552 | */ |
| 553 | if (hip->ip_p == conf->proto) |
| 554 | return (type == ICMP_TIMXCEED11? -1 : code + 1); |
| 555 | } |
| 556 | } |
| 557 | if (conf->verbose) { |
| 558 | int i; |
| 559 | in_addr_t *lp = (in_addr_t *)&icp->icmp_ipicmp_dun.id_ip.idi_ip; |
| 560 | |
| 561 | printf("\n%d bytes from %s", cc, inet_ntoa(from->sin_addr)); |
| 562 | printf(" to %s", inet_ntoa(ip->ip_dst)); |
| 563 | printf(": icmp type %u (%s) code %d\n", type, pr_type(type), |
| 564 | icp->icmp_code); |
| 565 | for (i = 4; i < cc ; i += sizeof(in_addr_t)) |
| 566 | printf("%2d: x%8.8lx\n", i, (unsigned long)*lp++); |
| 567 | } |
| 568 | return (0); |
| 569 | } |
| 570 | |
| 571 | int |
| 572 | packet_ok6(struct tr_conf *conf, struct msghdr *mhdr, int cc, int *seq) |
| 573 | { |
| 574 | struct icmp6_hdr *icp; |
| 575 | struct sockaddr_in6 *from = (struct sockaddr_in6 *)mhdr->msg_name; |
| 576 | u_char type, code; |
| 577 | char *buf = (char *)mhdr->msg_iov[0].iov_base; |
| 578 | struct cmsghdr *cm; |
| 579 | int *hlimp; |
| 580 | char hbuf[NI_MAXHOST256]; |
| 581 | int useicmp = (conf->proto == IPPROTO_ICMP1); |
| 582 | |
| 583 | if (cc < sizeof(struct icmp6_hdr)) { |
| 584 | if (conf->verbose) { |
| 585 | if (getnameinfo((struct sockaddr *)from, from->sin6_len, |
| 586 | hbuf, sizeof(hbuf), NULL((void *)0), 0, NI_NUMERICHOST1) != 0) |
| 587 | strlcpy(hbuf, "invalid", sizeof(hbuf)); |
| 588 | printf("packet too short (%d bytes) from %s\n", cc, |
| 589 | hbuf); |
| 590 | } |
| 591 | return(0); |
| 592 | } |
| 593 | icp = (struct icmp6_hdr *)buf; |
| 594 | /* get optional information via advanced API */ |
| 595 | rcvpktinfo = NULL((void *)0); |
| 596 | hlimp = NULL((void *)0); |
| 597 | for (cm = (struct cmsghdr *)CMSG_FIRSTHDR(mhdr)((mhdr)->msg_controllen >= sizeof(struct cmsghdr) ? (struct cmsghdr *)(mhdr)->msg_control : (struct cmsghdr *)((void * )0)); cm; |
| 598 | cm = (struct cmsghdr *)CMSG_NXTHDR(mhdr, cm)(((char *)(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof (long) - 1)) &~(sizeof(long) - 1)) + (((unsigned long)(sizeof (struct cmsghdr)) + (sizeof(long) - 1)) &~(sizeof(long) - 1)) > ((char *)(mhdr)->msg_control) + (mhdr)->msg_controllen ) ? (struct cmsghdr *)((void *)0) : (struct cmsghdr *)((char * )(cm) + (((unsigned long)((cm)->cmsg_len) + (sizeof(long) - 1)) &~(sizeof(long) - 1))))) { |
| 599 | if (cm->cmsg_level == IPPROTO_IPV641 && |
| 600 | cm->cmsg_type == IPV6_PKTINFO46 && |
| 601 | cm->cmsg_len == |
| 602 | CMSG_LEN(sizeof(struct in6_pktinfo))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(struct in6_pktinfo)))) |
| 603 | rcvpktinfo = (struct in6_pktinfo *)(CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1)))); |
| 604 | |
| 605 | if (cm->cmsg_level == IPPROTO_IPV641 && |
| 606 | cm->cmsg_type == IPV6_HOPLIMIT47 && |
| 607 | cm->cmsg_len == CMSG_LEN(sizeof(int))((((unsigned long)(sizeof(struct cmsghdr)) + (sizeof(long) - 1 )) &~(sizeof(long) - 1)) + (sizeof(int)))) |
| 608 | hlimp = (int *)CMSG_DATA(cm)((unsigned char *)(cm) + (((unsigned long)(sizeof(struct cmsghdr )) + (sizeof(long) - 1)) &~(sizeof(long) - 1))); |
| 609 | } |
| 610 | if (rcvpktinfo == NULL((void *)0) || hlimp == NULL((void *)0)) { |
| 611 | warnx("failed to get received hop limit or packet info"); |
| 612 | rcvhlim = 0; /*XXX*/ |
| 613 | } else |
| 614 | rcvhlim = *hlimp; |
| 615 | |
| 616 | type = icp->icmp6_type; |
| 617 | code = icp->icmp6_code; |
| 618 | if ((type == ICMP6_TIME_EXCEEDED3 && code == ICMP6_TIME_EXCEED_TRANSIT0) |
| 619 | || type == ICMP6_DST_UNREACH1) { |
| 620 | struct ip6_hdr *hip; |
| 621 | struct udphdr *up; |
| 622 | |
| 623 | hip = (struct ip6_hdr *)(icp + 1); |
| 624 | if ((up = get_udphdr(conf, hip, (u_char *)(buf + cc))) == |
| 625 | NULL((void *)0)) { |
| 626 | if (conf->verbose) |
| 627 | warnx("failed to get upper layer header"); |
| 628 | return(0); |
| 629 | } |
| 630 | if (useicmp && |
| 631 | ((struct icmp6_hdr *)up)->icmp6_idicmp6_dataun.icmp6_un_data16[0] == conf->ident) { |
| 632 | *seq = ntohs(((struct icmp6_hdr *)up)->icmp6_seq)(__uint16_t)(__builtin_constant_p(((struct icmp6_hdr *)up)-> icmp6_dataun.icmp6_un_data16[1]) ? (__uint16_t)(((__uint16_t) (((struct icmp6_hdr *)up)->icmp6_dataun.icmp6_un_data16[1] ) & 0xffU) << 8 | ((__uint16_t)(((struct icmp6_hdr * )up)->icmp6_dataun.icmp6_un_data16[1]) & 0xff00U) >> 8) : __swap16md(((struct icmp6_hdr *)up)->icmp6_dataun.icmp6_un_data16 [1])); |
| 633 | return (type == ICMP6_TIME_EXCEEDED3 ? -1 : code + 1); |
| 634 | } else if (!useicmp && |
| 635 | up->uh_sport == htons(srcport)(__uint16_t)(__builtin_constant_p(srcport) ? (__uint16_t)(((__uint16_t )(srcport) & 0xffU) << 8 | ((__uint16_t)(srcport) & 0xff00U) >> 8) : __swap16md(srcport))) { |
| 636 | *seq = ntohs(up->uh_dport)(__uint16_t)(__builtin_constant_p(up->uh_dport) ? (__uint16_t )(((__uint16_t)(up->uh_dport) & 0xffU) << 8 | (( __uint16_t)(up->uh_dport) & 0xff00U) >> 8) : __swap16md (up->uh_dport)) - conf->port; |
| 637 | return (type == ICMP6_TIME_EXCEEDED3 ? -1 : code + 1); |
| 638 | } |
| 639 | } else if (useicmp && type == ICMP6_ECHO_REPLY129) { |
| 640 | if (icp->icmp6_idicmp6_dataun.icmp6_un_data16[0] == conf->ident) { |
| 641 | *seq = ntohs(icp->icmp6_seq)(__uint16_t)(__builtin_constant_p(icp->icmp6_dataun.icmp6_un_data16 [1]) ? (__uint16_t)(((__uint16_t)(icp->icmp6_dataun.icmp6_un_data16 [1]) & 0xffU) << 8 | ((__uint16_t)(icp->icmp6_dataun .icmp6_un_data16[1]) & 0xff00U) >> 8) : __swap16md( icp->icmp6_dataun.icmp6_un_data16[1])); |
| 642 | return (-2); |
| 643 | } |
| 644 | } |
| 645 | if (conf->verbose) { |
| 646 | char sbuf[NI_MAXHOST256], dbuf[INET6_ADDRSTRLEN46]; |
| 647 | u_int8_t *p; |
| 648 | int i; |
| 649 | |
| 650 | if (getnameinfo((struct sockaddr *)from, from->sin6_len, |
| 651 | sbuf, sizeof(sbuf), NULL((void *)0), 0, NI_NUMERICHOST1) != 0) |
| 652 | strlcpy(sbuf, "invalid", sizeof(sbuf)); |
| 653 | printf("\n%d bytes from %s to %s", cc, sbuf, |
| 654 | rcvpktinfo ? inet_ntop(AF_INET624, &rcvpktinfo->ipi6_addr, |
| 655 | dbuf, sizeof(dbuf)) : "?"); |
| 656 | printf(": icmp type %d (%s) code %d\n", type, pr_type(type), |
| 657 | icp->icmp6_code); |
| 658 | p = (u_int8_t *)(icp + 1); |
| 659 | #define WIDTH16 16 |
| 660 | for (i = 0; i < cc; i++) { |
| 661 | if (i % WIDTH16 == 0) |
| 662 | printf("%04x:", i); |
| 663 | if (i % 4 == 0) |
| 664 | printf(" "); |
| 665 | printf("%02x", p[i]); |
| 666 | if (i % WIDTH16 == WIDTH16 - 1) |
| 667 | printf("\n"); |
| 668 | } |
| 669 | if (cc % WIDTH16 != 0) |
| 670 | printf("\n"); |
| 671 | } |
| 672 | return(0); |
| 673 | } |
| 674 | |
| 675 | void |
| 676 | print(struct tr_conf *conf, struct sockaddr *from, int cc, const char *to, |
| 677 | struct tr_result *tr_res) |
| 678 | { |
| 679 | struct asr_query *aq; |
| 680 | char hbuf[NI_MAXHOST256]; |
| 681 | |
| 682 | if (getnameinfo(from, from->sa_len, |
| 683 | tr_res->hbuf, sizeof(tr_res->hbuf), NULL((void *)0), 0, NI_NUMERICHOST1) != 0) |
| 684 | strlcpy(tr_res->hbuf, "invalid", sizeof(hbuf)); |
| 685 | |
| 686 | if (!conf->nflag) { |
| 687 | aq = getnameinfo_async(from, from->sa_len, tr_res->inetname, |
| 688 | sizeof(tr_res->inetname), NULL((void *)0), 0, NI_NAMEREQD8, NULL((void *)0)); |
| 689 | if (aq != NULL((void *)0)) |
| 690 | event_asr_run(aq, getnameinfo_async_done, tr_res); |
| 691 | else { |
| 692 | waiting_ttls[tr_res->row]--; |
| 693 | tr_res->inetname_done = 1; /* use hbuf */ |
| 694 | } |
| 695 | } |
| 696 | |
| 697 | if (conf->Aflag) |
| 698 | print_asn((struct sockaddr_storage *)from, tr_res); |
| 699 | |
| 700 | strlcpy(tr_res->to, to, sizeof(tr_res->to)); |
| 701 | tr_res->cc = cc; |
| 702 | } |
| 703 | |
| 704 | /* |
| 705 | * Increment pointer until find the UDP or ICMP header. |
| 706 | */ |
| 707 | struct udphdr * |
| 708 | get_udphdr(struct tr_conf *conf, struct ip6_hdr *ip6, u_char *lim) |
| 709 | { |
| 710 | u_char *cp = (u_char *)ip6, nh; |
| 711 | int hlen; |
| 712 | int useicmp = (conf->proto == IPPROTO_ICMP1); |
| 713 | |
| 714 | if (cp + sizeof(*ip6) >= lim) |
| 715 | return(NULL((void *)0)); |
| 716 | |
| 717 | nh = ip6->ip6_nxtip6_ctlun.ip6_un1.ip6_un1_nxt; |
| 718 | cp += sizeof(struct ip6_hdr); |
| 719 | |
| 720 | while (lim - cp >= 8) { |
| 721 | switch (nh) { |
| 722 | case IPPROTO_ESP50: |
| 723 | case IPPROTO_TCP6: |
| 724 | return(NULL((void *)0)); |
| 725 | case IPPROTO_ICMPV658: |
| 726 | return(useicmp ? (struct udphdr *)cp : NULL((void *)0)); |
| 727 | case IPPROTO_UDP17: |
| 728 | return(useicmp ? NULL((void *)0) : (struct udphdr *)cp); |
| 729 | case IPPROTO_FRAGMENT44: |
| 730 | hlen = sizeof(struct ip6_frag); |
| 731 | nh = ((struct ip6_frag *)cp)->ip6f_nxt; |
| 732 | break; |
| 733 | case IPPROTO_AH51: |
| 734 | hlen = (((struct ip6_ext *)cp)->ip6e_len + 2) << 2; |
| 735 | nh = ((struct ip6_ext *)cp)->ip6e_nxt; |
| 736 | break; |
| 737 | default: |
| 738 | hlen = (((struct ip6_ext *)cp)->ip6e_len + 1) << 3; |
| 739 | nh = ((struct ip6_ext *)cp)->ip6e_nxt; |
| 740 | break; |
| 741 | } |
| 742 | |
| 743 | cp += hlen; |
| 744 | } |
| 745 | |
| 746 | return(NULL((void *)0)); |
| 747 | } |
| 748 | |
| 749 | void |
| 750 | icmp_code(int af, int code, int *got_there, int *unreachable, |
| 751 | struct tr_result *tr_res) |
| 752 | { |
| 753 | switch (af) { |
| 754 | case AF_INET2: |
| 755 | icmp4_code(code, got_there, unreachable, tr_res); |
| 756 | break; |
| 757 | case AF_INET624: |
| 758 | icmp6_code(code, got_there, unreachable, tr_res); |
| 759 | break; |
| 760 | default: |
| 761 | errx(1, "unsupported AF: %d", af); |
| 762 | break; |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | void |
| 767 | icmp4_code(int code, int *got_there, int *unreachable, struct tr_result *tr_res) |
| 768 | { |
| 769 | struct ip *ip = (struct ip *)packet; |
| 770 | |
| 771 | switch (code) { |
| 772 | case ICMP_UNREACH_PORT3: |
| 773 | if (ip->ip_ttl <= 1) |
| 774 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), |
| 775 | "%s", " !"); |
| 776 | ++(*got_there); |
| 777 | break; |
| 778 | case ICMP_UNREACH_NET0: |
| 779 | ++(*unreachable); |
| 780 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 781 | " !N"); |
| 782 | break; |
| 783 | case ICMP_UNREACH_HOST1: |
| 784 | ++(*unreachable); |
| 785 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 786 | " !H"); |
| 787 | break; |
| 788 | case ICMP_UNREACH_PROTOCOL2: |
| 789 | ++(*got_there); |
| 790 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 791 | " !P"); |
| 792 | break; |
| 793 | case ICMP_UNREACH_NEEDFRAG4: |
| 794 | ++(*unreachable); |
| 795 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 796 | " !F"); |
| 797 | break; |
| 798 | case ICMP_UNREACH_SRCFAIL5: |
| 799 | ++(*unreachable); |
| 800 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 801 | " !S"); |
| 802 | break; |
| 803 | case ICMP_UNREACH_FILTER_PROHIB13: |
| 804 | ++(*unreachable); |
| 805 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 806 | " !X"); |
| 807 | break; |
| 808 | case ICMP_UNREACH_NET_PROHIB9: /*misuse*/ |
| 809 | ++(*unreachable); |
| 810 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 811 | " !A"); |
| 812 | break; |
| 813 | case ICMP_UNREACH_HOST_PROHIB10: |
| 814 | ++(*unreachable); |
| 815 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 816 | " !C"); |
| 817 | break; |
| 818 | case ICMP_UNREACH_NET_UNKNOWN6: |
| 819 | case ICMP_UNREACH_HOST_UNKNOWN7: |
| 820 | ++(*unreachable); |
| 821 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 822 | " !U"); |
| 823 | break; |
| 824 | case ICMP_UNREACH_ISOLATED8: |
| 825 | ++(*unreachable); |
| 826 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 827 | " !I"); |
| 828 | break; |
| 829 | case ICMP_UNREACH_TOSNET11: |
| 830 | case ICMP_UNREACH_TOSHOST12: |
| 831 | ++(*unreachable); |
| 832 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 833 | " !T"); |
| 834 | break; |
| 835 | default: |
| 836 | ++(*unreachable); |
| 837 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), " !<%d>", |
| 838 | code & 0xff); |
| 839 | break; |
| 840 | } |
| 841 | } |
| 842 | |
| 843 | void |
| 844 | icmp6_code(int code, int *got_there, int *unreachable, struct tr_result *tr_res) |
| 845 | { |
| 846 | switch (code) { |
| 847 | case ICMP6_DST_UNREACH_NOROUTE0: |
| 848 | ++(*unreachable); |
| 849 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 850 | " !N"); |
| 851 | break; |
| 852 | case ICMP6_DST_UNREACH_ADMIN1: |
| 853 | ++(*unreachable); |
| 854 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 855 | " !P"); |
| 856 | break; |
| 857 | case ICMP6_DST_UNREACH_BEYONDSCOPE2: |
| 858 | ++(*unreachable); |
| 859 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 860 | " !S"); |
| 861 | break; |
| 862 | case ICMP6_DST_UNREACH_ADDR3: |
| 863 | ++(*unreachable); |
| 864 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), "%s", |
| 865 | " !A"); |
| 866 | break; |
| 867 | case ICMP6_DST_UNREACH_NOPORT4: |
| 868 | if (rcvhlim <= 1) |
| 869 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), |
| 870 | "%s", " !"); |
| 871 | ++(*got_there); |
| 872 | break; |
| 873 | default: |
| 874 | ++(*unreachable); |
| 875 | snprintf(tr_res->icmp_code, sizeof(tr_res->icmp_code), " !<%d>", |
| 876 | code & 0xff); |
| 877 | break; |
| 878 | } |
| 879 | } |
| 880 | |
| 881 | /* |
| 882 | * Checksum routine for Internet Protocol family headers (C Version) |
| 883 | */ |
| 884 | u_short |
| 885 | in_cksum(u_short *addr, int len) |
| 886 | { |
| 887 | u_short *w = addr, answer; |
| 888 | int nleft = len, sum = 0; |
| 889 | |
| 890 | /* |
| 891 | * Our algorithm is simple, using a 32 bit accumulator (sum), |
| 892 | * we add sequential 16 bit words to it, and at the end, fold |
| 893 | * back all the carry bits from the top 16 bits into the lower |
| 894 | * 16 bits. |
| 895 | */ |
| 896 | while (nleft > 1) { |
| 897 | sum += *w++; |
| 898 | nleft -= 2; |
| 899 | } |
| 900 | |
| 901 | /* mop up an odd byte, if necessary */ |
| 902 | if (nleft == 1) |
| 903 | sum += *(u_char *)w; |
| 904 | |
| 905 | /* |
| 906 | * add back carry outs from top 16 bits to low 16 bits |
| 907 | */ |
| 908 | sum = (sum >> 16) + (sum & 0xffff); /* add hi 16 to low 16 */ |
| 909 | sum += (sum >> 16); /* add carry */ |
| 910 | answer = ~sum; /* truncate to 16 bits */ |
| 911 | return (answer); |
| 912 | } |
| 913 | |
| 914 | void |
| 915 | print_asn(struct sockaddr_storage *ss, struct tr_result *tr_res) |
| 916 | { |
| 917 | struct asr_query *aq; |
| 918 | const u_char *uaddr; |
| 919 | char qbuf[MAXDNAME1025]; |
| 920 | |
| 921 | switch (ss->ss_family) { |
| 922 | case AF_INET2: |
| 923 | uaddr = (const u_char *)&((struct sockaddr_in *) ss)->sin_addr; |
| 924 | if (snprintf(qbuf, sizeof qbuf, "%u.%u.%u.%u." |
| 925 | "origin.asn.cymru.com", |
| 926 | (uaddr[3] & 0xff), (uaddr[2] & 0xff), |
| 927 | (uaddr[1] & 0xff), (uaddr[0] & 0xff)) >= sizeof (qbuf)) |
| 928 | return; |
| 929 | break; |
| 930 | case AF_INET624: |
| 931 | uaddr = (const u_char *)&((struct sockaddr_in6 *) ss)->sin6_addr; |
| 932 | if (snprintf(qbuf, sizeof qbuf, |
| 933 | "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x." |
| 934 | "%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x.%x." |
| 935 | "origin6.asn.cymru.com", |
| 936 | (uaddr[15] & 0x0f), ((uaddr[15] >>4)& 0x0f), |
| 937 | (uaddr[14] & 0x0f), ((uaddr[14] >>4)& 0x0f), |
| 938 | (uaddr[13] & 0x0f), ((uaddr[13] >>4)& 0x0f), |
| 939 | (uaddr[12] & 0x0f), ((uaddr[12] >>4)& 0x0f), |
| 940 | (uaddr[11] & 0x0f), ((uaddr[11] >>4)& 0x0f), |
| 941 | (uaddr[10] & 0x0f), ((uaddr[10] >>4)& 0x0f), |
| 942 | (uaddr[9] & 0x0f), ((uaddr[9] >>4)& 0x0f), |
| 943 | (uaddr[8] & 0x0f), ((uaddr[8] >>4)& 0x0f), |
| 944 | (uaddr[7] & 0x0f), ((uaddr[7] >>4)& 0x0f), |
| 945 | (uaddr[6] & 0x0f), ((uaddr[6] >>4)& 0x0f), |
| 946 | (uaddr[5] & 0x0f), ((uaddr[5] >>4)& 0x0f), |
| 947 | (uaddr[4] & 0x0f), ((uaddr[4] >>4)& 0x0f), |
| 948 | (uaddr[3] & 0x0f), ((uaddr[3] >>4)& 0x0f), |
| 949 | (uaddr[2] & 0x0f), ((uaddr[2] >>4)& 0x0f), |
| 950 | (uaddr[1] & 0x0f), ((uaddr[1] >>4)& 0x0f), |
| 951 | (uaddr[0] & 0x0f), ((uaddr[0] >>4)& 0x0f)) >= sizeof (qbuf)) |
| 952 | return; |
| 953 | break; |
| 954 | default: |
| 955 | return; |
| 956 | } |
| 957 | |
| 958 | if ((aq = getrrsetbyname_async(qbuf, C_IN1, T_TXT16, 0, NULL((void *)0))) != NULL((void *)0)) |
| 959 | event_asr_run(aq, getrrsetbyname_async_done, tr_res); |
| 960 | else { |
| 961 | waiting_ttls[tr_res->row]--; |
| 962 | tr_res->asn_done = 1; |
| 963 | } |
| 964 | } |
| 965 | |
| 966 | int |
| 967 | map_tos(char *s, int *val) |
| 968 | { |
| 969 | /* DiffServ Codepoints and other TOS mappings */ |
| 970 | const struct toskeywords { |
| 971 | const char *keyword; |
| 972 | int val; |
| 973 | } *t, toskeywords[] = { |
| 974 | { "af11", IPTOS_DSCP_AF110x28 }, |
| 975 | { "af12", IPTOS_DSCP_AF120x30 }, |
| 976 | { "af13", IPTOS_DSCP_AF130x38 }, |
| 977 | { "af21", IPTOS_DSCP_AF210x48 }, |
| 978 | { "af22", IPTOS_DSCP_AF220x50 }, |
| 979 | { "af23", IPTOS_DSCP_AF230x58 }, |
| 980 | { "af31", IPTOS_DSCP_AF310x68 }, |
| 981 | { "af32", IPTOS_DSCP_AF320x70 }, |
| 982 | { "af33", IPTOS_DSCP_AF330x78 }, |
| 983 | { "af41", IPTOS_DSCP_AF410x88 }, |
| 984 | { "af42", IPTOS_DSCP_AF420x90 }, |
| 985 | { "af43", IPTOS_DSCP_AF430x98 }, |
| 986 | { "critical", IPTOS_PREC_CRITIC_ECP0xa0 }, |
| 987 | { "cs0", IPTOS_DSCP_CS00x00 }, |
| 988 | { "cs1", IPTOS_DSCP_CS10x20 }, |
| 989 | { "cs2", IPTOS_DSCP_CS20x40 }, |
| 990 | { "cs3", IPTOS_DSCP_CS30x60 }, |
| 991 | { "cs4", IPTOS_DSCP_CS40x80 }, |
| 992 | { "cs5", IPTOS_DSCP_CS50xa0 }, |
| 993 | { "cs6", IPTOS_DSCP_CS60xc0 }, |
| 994 | { "cs7", IPTOS_DSCP_CS70xe0 }, |
| 995 | { "ef", IPTOS_DSCP_EF0xb8 }, |
| 996 | { "inetcontrol", IPTOS_PREC_INTERNETCONTROL0xc0 }, |
| 997 | { "lowdelay", IPTOS_LOWDELAY0x10 }, |
| 998 | { "netcontrol", IPTOS_PREC_NETCONTROL0xe0 }, |
| 999 | { "reliability", IPTOS_RELIABILITY0x04 }, |
| 1000 | { "throughput", IPTOS_THROUGHPUT0x08 }, |
| 1001 | { NULL((void *)0), -1 }, |
| 1002 | }; |
| 1003 | |
| 1004 | for (t = toskeywords; t->keyword != NULL((void *)0); t++) { |
| 1005 | if (strcmp(s, t->keyword) == 0) { |
| 1006 | *val = t->val; |
| 1007 | return (1); |
| 1008 | } |
| 1009 | } |
| 1010 | |
| 1011 | return (0); |
| 1012 | } |
| 1013 | |
| 1014 | void |
| 1015 | gettime(struct timeval *tv) |
| 1016 | { |
| 1017 | struct timespec ts; |
| 1018 | |
| 1019 | if (clock_gettime(CLOCK_MONOTONIC3, &ts) == -1) |
| 1020 | err(1, "clock_gettime(CLOCK_MONOTONIC)"); |
| 1021 | |
| 1022 | TIMESPEC_TO_TIMEVAL(tv, &ts)do { (tv)->tv_sec = (&ts)->tv_sec; (tv)->tv_usec = (&ts)->tv_nsec / 1000; } while (0); |
| 1023 | } |
| 1024 | |
| 1025 | void |
| 1026 | check_timeout(struct tr_result *tr_row, struct tr_conf *conf) |
| 1027 | { |
| 1028 | struct timeval t2; |
| 1029 | int i; |
| 1030 | |
| 1031 | gettime(&t2); |
| 1032 | |
| 1033 | for (i = 0; i < conf->nprobes; i++) { |
| 1034 | /* we didn't send the probe yet */ |
| 1035 | if (tr_row[i].ttl == 0) |
| 1036 | return; |
| 1037 | /* we got a result, it can no longer timeout */ |
| 1038 | if (tr_row[i].dup) |
| 1039 | continue; |
| 1040 | |
| 1041 | if (deltaT(&tr_row[i].t1, &t2) > conf->waittime) { |
| 1042 | tr_row[i].timeout = 1; |
| 1043 | tr_row[i].dup++; /* we "saw" the result */ |
| 1044 | waiting_ttls[tr_row[i].row] -= |
| 1045 | conf->expected_responses; |
| 1046 | } |
| 1047 | } |
| 1048 | } |
| 1049 | |
| 1050 | void |
| 1051 | catchup_result_rows(struct tr_result *tr_results, struct tr_conf *conf) |
| 1052 | { |
| 1053 | static int timeout_row = 0; |
| 1054 | static int print_row = 0; |
| 1055 | int i, j, all_timeout = 1; |
| 1056 | |
| 1057 | for (; timeout_row < conf->max_ttl; timeout_row++) { |
| 1058 | struct tr_result *tr_row = tr_results + |
| 1059 | timeout_row * conf->nprobes; |
| 1060 | check_timeout(tr_row, conf); |
| 1061 | if (waiting_ttls[timeout_row] > 0) |
| 1062 | break; |
| 1063 | } |
| 1064 | |
| 1065 | for (i = print_row; i < timeout_row; i++) { |
| 1066 | struct tr_result *tr_row = tr_results + i * conf->nprobes; |
| 1067 | |
| 1068 | if (waiting_ttls[i] > 0) |
| 1069 | break; |
| 1070 | |
| 1071 | for (j = 0; j < conf->nprobes; j++) { |
| 1072 | if (!tr_row[j].timeout) { |
| 1073 | all_timeout = 0; |
| 1074 | break; |
| 1075 | } |
| 1076 | } |
| 1077 | if (!all_timeout) |
| 1078 | break; |
| 1079 | } |
| 1080 | |
| 1081 | if (all_timeout && i != conf->max_ttl) |
| 1082 | return; |
| 1083 | |
| 1084 | if (i == conf->max_ttl) |
| 1085 | print_row = i - 1; /* jump ahead, skip long trail of * * * */ |
| 1086 | |
| 1087 | for (; print_row <= i; print_row++) { |
| 1088 | struct tr_result *tr_row = tr_results + |
| 1089 | print_row * conf->nprobes; |
| 1090 | if (waiting_ttls[print_row] > 0) |
| 1091 | break; |
| 1092 | print_result_row(tr_row, conf); |
| 1093 | } |
| 1094 | } |
| 1095 | |
| 1096 | void |
| 1097 | print_result_row(struct tr_result *tr_results, struct tr_conf *conf) |
| 1098 | { |
| 1099 | int i, loss = 0, got_there = 0, unreachable = 0; |
| 1100 | char *lastaddr = NULL((void *)0); |
| 1101 | |
| 1102 | printf("%2u ", tr_results[0].ttl); |
| 1103 | for (i = 0; i < conf->nprobes; i++) { |
| 1104 | got_there += tr_results[i].got_there; |
| 1105 | unreachable += tr_results[i].unreachable; |
| 1106 | |
| 1107 | if (tr_results[i].timeout) { |
| 1108 | printf(" %s%s", "*", tr_results[i].icmp_code); |
| 1109 | loss++; |
| 1110 | continue; |
| 1111 | } |
| 1112 | |
| 1113 | if (lastaddr == NULL((void *)0) || strcmp(lastaddr, tr_results[i].hbuf) |
| 1114 | != 0) { |
| 1115 | if (*tr_results[i].hbuf != '\0') { |
| 1116 | if (conf->nflag) |
| 1117 | printf(" %s", tr_results[i].hbuf); |
| 1118 | else |
| 1119 | printf(" %s (%s)", |
| 1120 | tr_results[i].inetname[0] == '\0' ? |
| 1121 | tr_results[i].hbuf : |
| 1122 | tr_results[i].inetname, |
| 1123 | tr_results[i].hbuf); |
| 1124 | if (conf->Aflag && tr_results[i].asn != NULL((void *)0)) |
| 1125 | printf(" %s", tr_results[i].asn); |
| 1126 | if (conf->verbose) |
| 1127 | printf(" %d bytes to %s", |
| 1128 | tr_results[i].cc, |
| 1129 | tr_results[i].to); |
| 1130 | } |
| 1131 | } |
| 1132 | lastaddr = tr_results[i].hbuf; |
| 1133 | printf(" %g ms%s%s", |
| 1134 | deltaT(&tr_results[i].t1, |
| 1135 | &tr_results[i].t2), |
| 1136 | tr_results[i].tos, |
| 1137 | tr_results[i].icmp_code); |
| 1138 | if (conf->ttl_flag) |
| 1139 | printf(" (%u)", tr_results[i].resp_ttl); |
| 1140 | |
| 1141 | if (tr_results[i].exthdr) |
| 1142 | printf("%s", tr_results[i].exthdr); |
| 1143 | } |
| 1144 | if (conf->sump) |
| 1145 | printf(" (%d%% loss)", (loss * 100) / conf->nprobes); |
| 1146 | putchar('\n')(!__isthreaded ? __sputc('\n', (&__sF[1])) : (putc)('\n', (&__sF[1]))); |
| 1147 | fflush(stdout(&__sF[1])); |
| 1148 | if (got_there || unreachable || tr_results[0].ttl == conf->max_ttl) |
| 1149 | exit(0); |
| 1150 | } |
| 1151 | |
| 1152 | void |
| 1153 | getnameinfo_async_done(struct asr_result *ar, void *arg) |
| 1154 | { |
| 1155 | static char domain[HOST_NAME_MAX255 + 1]; |
| 1156 | static int first = 1; |
| 1157 | struct tr_result *tr_res = arg; |
| 1158 | char *cp; |
| 1159 | |
| 1160 | if (first) { |
| 1161 | first = 0; |
| 1162 | if (gethostname(domain, sizeof(domain)) == 0 && |
| 1163 | (cp = strchr(domain, '.')) != NULL((void *)0)) |
| 1164 | memmove(domain, cp + 1, strlen(cp + 1) + 1); |
| 1165 | else |
| 1166 | domain[0] = 0; |
| 1167 | } |
| 1168 | |
| 1169 | tr_res->inetname_done = 1; |
| 1170 | waiting_ttls[tr_res->row]--; |
| 1171 | |
| 1172 | if (ar->ar_gai_errno == 0) { |
| 1173 | if ((cp = strchr(tr_res->inetname, '.')) != NULL((void *)0) && |
| 1174 | strcmp(cp + 1, domain) == 0) |
| 1175 | *cp = '\0'; |
| 1176 | } else |
| 1177 | tr_res->inetname[0]='\0'; |
| 1178 | } |
| 1179 | |
| 1180 | void |
| 1181 | getrrsetbyname_async_done(struct asr_result *ar, void *arg) |
| 1182 | { |
| 1183 | struct tr_result *tr_res = arg; |
| 1184 | struct rrsetinfo *answers; |
| 1185 | size_t asn_size = 0, len; |
| 1186 | int counter; |
| 1187 | char *asn; |
| 1188 | |
| 1189 | tr_res->asn_done = 1; |
| 1190 | waiting_ttls[tr_res->row]--; |
| 1191 | if (ar->ar_rrset_errno != 0) |
| 1192 | return; |
| 1193 | |
| 1194 | answers = ar->ar_rrsetinfo; |
| 1195 | |
| 1196 | if (answers->rri_nrdatas > 0) { |
| 1197 | asn_size = answers->rri_nrdatas * sizeof("AS2147483647, ") + 3; |
| 1198 | if ((tr_res->asn = calloc(1, asn_size)) == NULL((void *)0)) |
| 1199 | err(1, NULL((void *)0)); |
| 1200 | asn = tr_res->asn; |
| 1201 | } |
| 1202 | |
| 1203 | for (counter = 0; counter < answers->rri_nrdatas; counter++) { |
| 1204 | char *p, *as = answers->rri_rdatas[counter].rdi_data; |
| 1205 | as++; /* skip first byte, it contains length */ |
| 1206 | if ((p = strchr(as,'|'))) { |
| 1207 | p[-1] = 0; |
| 1208 | len = snprintf(asn, asn_size, "%sAS%s", |
| 1209 | counter ? ", " : "[", as); |
| 1210 | if (len != -1 && len < asn_size) { |
| 1211 | asn += len; |
| 1212 | asn_size -= len; |
| 1213 | } else |
| 1214 | asn_size = 0; |
| 1215 | } |
| 1216 | } |
| 1217 | if (counter && asn_size > 0) |
| 1218 | *asn=']'; |
| 1219 | |
| 1220 | freerrset(answers); |
| 1221 | } |