ping.c revision 1.69
1 /* $NetBSD: ping.c,v 1.69 2002/11/16 14:09:16 itojun Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Muuss. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 /* 40 * P I N G . C 41 * 42 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 43 * measure round-trip-delays and packet loss across network paths. 44 * 45 * Author - 46 * Mike Muuss 47 * U. S. Army Ballistic Research Laboratory 48 * December, 1983 49 * Modified at Uc Berkeley 50 * Record Route and verbose headers - Phil Dykstra, BRL, March 1988. 51 * Multicast options (ttl, if, loop) - Steve Deering, Stanford, August 1988. 52 * ttl, duplicate detection - Cliff Frost, UCB, April 1989 53 * Pad pattern - Cliff Frost (from Tom Ferrin, UCSF), April 1989 54 * 55 * Status - 56 * Public Domain. Distribution Unlimited. 57 * 58 * Bugs - 59 * More statistics could always be gathered. 60 * This program has to run SUID to ROOT to access the ICMP socket. 61 */ 62 63 #include <sys/cdefs.h> 64 #ifndef lint 65 __RCSID("$NetBSD: ping.c,v 1.69 2002/11/16 14:09:16 itojun Exp $"); 66 #endif 67 68 #include <stdio.h> 69 #include <stddef.h> 70 #include <errno.h> 71 #include <sys/time.h> 72 #include <sys/types.h> 73 #include <sys/signal.h> 74 #include <sys/param.h> 75 #include <sys/socket.h> 76 #include <sys/file.h> 77 #include <termios.h> 78 #include <stdlib.h> 79 #include <unistd.h> 80 #include <poll.h> 81 #include <limits.h> 82 #include <math.h> 83 #include <string.h> 84 #include <err.h> 85 #ifdef sgi 86 #include <bstring.h> 87 #include <getopt.h> 88 #include <sys/prctl.h> 89 #ifndef PRE_KUDZU 90 #include <cap_net.h> 91 #else 92 #define cap_socket socket 93 #endif 94 #else 95 #define cap_socket socket 96 #include <err.h> 97 #endif 98 99 #include <netinet/in_systm.h> 100 #include <netinet/in.h> 101 #include <netinet/ip.h> 102 #include <netinet/ip_icmp.h> 103 #include <netinet/ip_var.h> 104 #include <arpa/inet.h> 105 #include <ctype.h> 106 #include <netdb.h> 107 108 #ifdef IPSEC 109 #include <netinet6/ipsec.h> 110 #endif /*IPSEC*/ 111 112 #define FLOOD_INTVL 0.01 /* default flood output interval */ 113 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 114 115 #define F_VERBOSE 0x0001 116 #define F_QUIET 0x0002 /* minimize all output */ 117 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 118 #define F_FLOOD 0x0008 /* flood-ping */ 119 #define F_RECORD_ROUTE 0x0010 /* record route */ 120 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 121 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 122 #define F_PING_RANDOM 0x0080 /* use random data */ 123 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 124 #define F_TIMING 0x0200 /* room for a timestamp */ 125 #define F_DF 0x0400 /* set IP DF bit */ 126 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 127 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 128 #define F_MCAST 0x2000 /* multicast target */ 129 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 130 #define F_AUDIBLE 0x8000 /* audible output */ 131 #ifdef IPSEC 132 #ifdef IPSEC_POLICY_IPSEC 133 #define F_POLICY 0x10000 134 #else 135 #define F_AUTHHDR 0x10000 136 #define F_ENCRYPT 0x20000 137 #endif /*IPSEC_POLICY_IPSEC*/ 138 #endif /*IPSEC*/ 139 140 141 /* MAX_DUP_CHK is the number of bits in received table, the 142 * maximum number of received sequence numbers we can track to check 143 * for duplicates. 144 */ 145 #define MAX_DUP_CHK (8 * 2048) 146 u_char rcvd_tbl[MAX_DUP_CHK/8]; 147 int nrepeats = 0; 148 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 149 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 150 #define SET(seq) (A(seq) |= B(seq)) 151 #define CLR(seq) (A(seq) &= (~B(seq))) 152 #define TST(seq) (A(seq) & B(seq)) 153 154 155 156 u_char *packet; 157 int packlen; 158 int pingflags = 0, options; 159 char *fill_pat; 160 161 int s; /* Socket file descriptor */ 162 int sloop; /* Socket file descriptor/loopback */ 163 164 #define PHDR_LEN sizeof(struct timeval) /* size of timestamp header */ 165 struct sockaddr_in whereto, send_addr; /* Who to ping */ 166 struct sockaddr_in src_addr; /* from where */ 167 struct sockaddr_in loc_addr; /* 127.1 */ 168 int datalen = 64-PHDR_LEN; /* How much data */ 169 170 #ifndef __NetBSD__ 171 static char *progname; 172 #define getprogname() (progname) 173 #define setprogname(name) ((void)(progname = (name))) 174 #endif 175 176 char hostname[MAXHOSTNAMELEN]; 177 178 static struct { 179 struct ip o_ip; 180 char o_opt[MAX_IPOPTLEN]; 181 union { 182 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 183 struct icmp u_icmp; 184 } o_u; 185 } out_pack; 186 #define opack_icmp out_pack.o_u.u_icmp 187 struct ip *opack_ip; 188 189 char optspace[MAX_IPOPTLEN]; /* record route space */ 190 int optlen; 191 192 193 int npackets; /* total packets to send */ 194 int preload; /* number of packets to "preload" */ 195 int ntransmitted; /* output sequence # = #sent */ 196 int ident; /* our ID, in network byte order */ 197 198 int nreceived; /* # of packets we got back */ 199 200 double interval; /* interval between packets */ 201 struct timeval interval_tv; 202 double tmin = 999999999.0; 203 double tmax = 0.0; 204 double tsum = 0.0; /* sum of all times */ 205 double tsumsq = 0.0; 206 double maxwait = 0.0; 207 208 #ifdef SIGINFO 209 int reset_kerninfo; 210 #endif 211 212 int bufspace = IP_MAXPACKET; 213 214 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 215 struct timeval last_rx, first_rx; 216 int lastrcvd = 1; /* last ping sent has been received */ 217 218 static struct timeval jiggle_time; 219 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 220 221 static void doit(void); 222 static void prefinish(int); 223 static void prtsig(int); 224 static void finish(int); 225 static void summary(int); 226 static void pinger(void); 227 static void fill(void); 228 static void rnd_fill(void); 229 static double diffsec(struct timeval *, struct timeval *); 230 static void timevaladd(struct timeval *, struct timeval *); 231 static void sec_to_timeval(const double, struct timeval *); 232 static double timeval_to_sec(const struct timeval *); 233 static void pr_pack(u_char *, int, struct sockaddr_in *); 234 static u_int16_t in_cksum(u_int16_t *, u_int); 235 static void pr_saddr(u_char *); 236 static char *pr_addr(struct in_addr *); 237 static void pr_iph(struct icmp *, int); 238 static void pr_retip(struct icmp *, int); 239 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 240 static void jiggle(int), jiggle_flush(int); 241 static void gethost(const char *, const char *, 242 struct sockaddr_in *, char *, int); 243 static void usage(void); 244 245 246 int 247 main(int argc, char *argv[]) 248 { 249 int c, i, on = 1, hostind = 0; 250 long l; 251 u_char ttl = 0; 252 u_long tos = 0; 253 char *p; 254 #ifdef SIGINFO 255 struct termios ts; 256 #endif 257 #ifdef IPSEC 258 #ifdef IPSEC_POLICY_IPSEC 259 char *policy_in = NULL; 260 char *policy_out = NULL; 261 #endif 262 #endif 263 264 265 setprogname(argv[0]); 266 267 #ifndef IPSEC 268 #define IPSECOPT 269 #else 270 #ifdef IPSEC_POLICY_IPSEC 271 #define IPSECOPT "E:" 272 #else 273 #define IPSECOPT "AE" 274 #endif /*IPSEC_POLICY_IPSEC*/ 275 #endif 276 while ((c = getopt(argc, argv, 277 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 278 #undef IPSECOPT 279 switch (c) { 280 case 'a': 281 pingflags |= F_AUDIBLE; 282 break; 283 case 'c': 284 npackets = strtol(optarg, &p, 0); 285 if (*p != '\0' || npackets <= 0) 286 errx(1, "Bad/invalid number of packets"); 287 break; 288 case 'D': 289 pingflags |= F_DF; 290 break; 291 case 'd': 292 options |= SO_DEBUG; 293 break; 294 case 'f': 295 pingflags |= F_FLOOD; 296 break; 297 case 'h': 298 hostind = optind-1; 299 break; 300 case 'i': /* wait between sending packets */ 301 interval = strtod(optarg, &p); 302 if (*p != '\0' || interval <= 0) 303 errx(1, "Bad/invalid interval %s", optarg); 304 break; 305 case 'l': 306 preload = strtol(optarg, &p, 0); 307 if (*p != '\0' || preload < 0) 308 errx(1, "Bad/invalid preload value %s", 309 optarg); 310 break; 311 case 'n': 312 pingflags |= F_NUMERIC; 313 break; 314 case 'o': 315 pingflags |= F_ONCE; 316 break; 317 case 'p': /* fill buffer with user pattern */ 318 if (pingflags & F_PING_RANDOM) 319 errx(1, "Only one of -P and -p allowed"); 320 pingflags |= F_PING_FILLED; 321 fill_pat = optarg; 322 break; 323 case 'P': 324 if (pingflags & F_PING_FILLED) 325 errx(1, "Only one of -P and -p allowed"); 326 pingflags |= F_PING_RANDOM; 327 break; 328 case 'q': 329 pingflags |= F_QUIET; 330 break; 331 case 'Q': 332 pingflags |= F_SEMI_QUIET; 333 break; 334 case 'r': 335 options |= SO_DONTROUTE; 336 break; 337 case 's': /* size of packet to send */ 338 datalen = strtol(optarg, &p, 0); 339 if (*p != '\0' || datalen <= 0) 340 errx(1, "Bad/invalid packet size %s", optarg); 341 if (datalen > MAXPACKET) 342 errx(1, "packet size is too large"); 343 break; 344 case 'v': 345 pingflags |= F_VERBOSE; 346 break; 347 case 'R': 348 pingflags |= F_RECORD_ROUTE; 349 break; 350 case 'L': 351 pingflags |= F_MCAST_NOLOOP; 352 break; 353 case 't': 354 tos = strtoul(optarg, &p, 0); 355 if (*p != '\0' || tos > 0xFF) 356 errx(1, "bad tos value: %s", optarg); 357 break; 358 case 'T': 359 l = strtol(optarg, &p, 0); 360 if (*p != '\0' || l > 255 || l <= 0) 361 errx(1, "ttl out of range"); 362 ttl = (u_char)l; /* cannot check >255 otherwise */ 363 break; 364 case 'I': 365 pingflags |= F_SOURCE_ADDR; 366 gethost("-I", optarg, &src_addr, 0, 0); 367 break; 368 case 'g': 369 pingflags |= F_SOURCE_ROUTE; 370 gethost("-g", optarg, &send_addr, 0, 0); 371 break; 372 case 'w': 373 maxwait = strtod(optarg, &p); 374 if (*p != '\0' || maxwait <= 0) 375 errx(1, "Bad/invalid maxwait time %s", optarg); 376 break; 377 #ifdef IPSEC 378 #ifdef IPSEC_POLICY_IPSEC 379 case 'E': 380 pingflags |= F_POLICY; 381 if (!strncmp("in", optarg, 2)) 382 policy_in = strdup(optarg); 383 else if (!strncmp("out", optarg, 3)) 384 policy_out = strdup(optarg); 385 else 386 errx(1, "invalid security policy"); 387 break; 388 #else 389 case 'A': 390 pingflags |= F_AUTHHDR; 391 break; 392 case 'E': 393 pingflags |= F_ENCRYPT; 394 break; 395 #endif /*IPSEC_POLICY_IPSEC*/ 396 #endif /*IPSEC*/ 397 default: 398 usage(); 399 break; 400 } 401 } 402 403 if (interval == 0) 404 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 405 #ifndef sgi 406 if (pingflags & F_FLOOD && getuid()) 407 errx(1, "Must be superuser to use -f"); 408 if (interval < 1.0 && getuid()) 409 errx(1, "Must be superuser to use < 1 sec ping interval"); 410 if (preload > 0 && getuid()) 411 errx(1, "Must be superuser to use -l"); 412 #endif 413 sec_to_timeval(interval, &interval_tv); 414 415 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 416 warnx("Sorry, no audible output for flood pings"); 417 418 if (npackets != 0) { 419 npackets += preload; 420 } else { 421 npackets = INT_MAX; 422 } 423 424 if (hostind == 0) { 425 if (optind != argc-1) 426 usage(); 427 else 428 hostind = optind; 429 } 430 else if (hostind >= argc - 1) 431 usage(); 432 433 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 434 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 435 pingflags |= F_MCAST; 436 if (!(pingflags & F_SOURCE_ROUTE)) 437 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 438 439 loc_addr.sin_family = AF_INET; 440 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 441 442 if (datalen >= PHDR_LEN) /* can we time them? */ 443 pingflags |= F_TIMING; 444 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 445 if ((packet = (u_char *)malloc(packlen)) == NULL) 446 err(1, "Out of memory"); 447 448 if (pingflags & F_PING_FILLED) { 449 fill(); 450 } else if (pingflags & F_PING_RANDOM) { 451 rnd_fill(); 452 } else { 453 for (i = PHDR_LEN; i < datalen; i++) 454 opack_icmp.icmp_data[i] = i; 455 } 456 457 ident = htons(getpid()) & 0xFFFF; 458 459 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 460 err(1, "Cannot create socket"); 461 if (options & SO_DEBUG) { 462 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 463 (char *)&on, sizeof(on)) == -1) 464 warn("Can't turn on socket debugging"); 465 } 466 if (options & SO_DONTROUTE) { 467 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 468 (char *)&on, sizeof(on)) == -1) 469 warn("SO_DONTROUTE"); 470 } 471 472 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 473 err(1, "Cannot create socket"); 474 if (options & SO_DEBUG) { 475 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 476 (char *)&on, sizeof(on)) == -1) 477 warn("Can't turn on socket debugging"); 478 } 479 if (options & SO_DONTROUTE) { 480 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 481 (char *)&on, sizeof(on)) == -1) 482 warn("SO_DONTROUTE"); 483 } 484 485 if (pingflags & F_SOURCE_ROUTE) { 486 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 487 optspace[IPOPT_OLEN] = optlen = 7; 488 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 489 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 490 sizeof(whereto.sin_addr)); 491 optspace[optlen++] = IPOPT_NOP; 492 } 493 if (pingflags & F_RECORD_ROUTE) { 494 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 495 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 496 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 497 optlen = MAX_IPOPTLEN; 498 } 499 /* this leaves opack_ip 0(mod 4) aligned */ 500 opack_ip = (struct ip *)((char *)&out_pack.o_ip 501 + sizeof(out_pack.o_opt) 502 - optlen); 503 (void) memcpy(opack_ip + 1, optspace, optlen); 504 505 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 506 err(1, "Can't set special IP header"); 507 508 opack_ip->ip_v = IPVERSION; 509 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 510 opack_ip->ip_tos = tos; 511 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 512 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 513 opack_ip->ip_p = IPPROTO_ICMP; 514 opack_ip->ip_src = src_addr.sin_addr; 515 opack_ip->ip_dst = send_addr.sin_addr; 516 517 if (pingflags & F_MCAST) { 518 if (pingflags & F_MCAST_NOLOOP) { 519 u_char loop = 0; 520 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 521 (char *) &loop, 1) < 0) 522 err(1, "Can't disable multicast loopback"); 523 } 524 525 if (ttl != 0 526 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 527 (char *) &ttl, 1) < 0) 528 err(1, "Can't set multicast time-to-live"); 529 530 if ((pingflags & F_SOURCE_ADDR) 531 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 532 (char *) &src_addr.sin_addr, 533 sizeof(src_addr.sin_addr)) < 0) 534 err(1, "Can't set multicast source interface"); 535 536 } else if (pingflags & F_SOURCE_ADDR) { 537 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 538 (char *) &src_addr.sin_addr, 539 sizeof(src_addr.sin_addr)) < 0) 540 err(1, "Can't set source interface/address"); 541 } 542 #ifdef IPSEC 543 #ifdef IPSEC_POLICY_IPSEC 544 { 545 char *buf; 546 if (pingflags & F_POLICY) { 547 if (policy_in != NULL) { 548 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 549 if (buf == NULL) 550 errx(1, "%s", ipsec_strerror()); 551 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 552 buf, ipsec_get_policylen(buf)) < 0) { 553 err(1, "ipsec policy cannot be configured"); 554 } 555 free(buf); 556 } 557 if (policy_out != NULL) { 558 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 559 if (buf == NULL) 560 errx(1, "%s", ipsec_strerror()); 561 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 562 buf, ipsec_get_policylen(buf)) < 0) { 563 err(1, "ipsec policy cannot be configured"); 564 } 565 free(buf); 566 } 567 } 568 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 569 if (buf == NULL) 570 errx(1, "%s", ipsec_strerror()); 571 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 572 buf, ipsec_get_policylen(buf)) < 0) { 573 #if 0 574 warnx("ipsec is not configured"); 575 #else 576 /* ignore it, should be okay */ 577 #endif 578 } 579 free(buf); 580 } 581 #else 582 { 583 int optval; 584 if (pingflags & F_AUTHHDR) { 585 optval = IPSEC_LEVEL_REQUIRE; 586 #ifdef IP_AUTH_TRANS_LEVEL 587 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 588 (char *)&optval, sizeof(optval)); 589 #else 590 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 591 (char *)&optval, sizeof(optval)); 592 #endif 593 } 594 if (pingflags & F_ENCRYPT) { 595 optval = IPSEC_LEVEL_REQUIRE; 596 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 597 (char *)&optval, sizeof(optval)); 598 } 599 optval = IPSEC_LEVEL_BYPASS; 600 #ifdef IP_AUTH_TRANS_LEVEL 601 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 602 (char *)&optval, sizeof(optval)); 603 #else 604 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 605 (char *)&optval, sizeof(optval)); 606 #endif 607 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 608 (char *)&optval, sizeof(optval)); 609 } 610 #endif /*IPSEC_POLICY_IPSEC*/ 611 #endif /*IPSEC*/ 612 613 (void)printf("PING %s (%s): %d data bytes\n", hostname, 614 inet_ntoa(whereto.sin_addr), datalen); 615 616 /* When pinging the broadcast address, you can get a lot 617 * of answers. Doing something so evil is useful if you 618 * are trying to stress the ethernet, or just want to 619 * fill the arp cache to get some stuff for /etc/ethers. 620 */ 621 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 622 (char*)&bufspace, sizeof(bufspace))) { 623 if ((bufspace -= 4096) <= 0) 624 err(1, "Cannot set the receive buffer size"); 625 } 626 627 /* make it possible to send giant probes, but do not worry now 628 * if it fails, since we probably won't send giant probes. 629 */ 630 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 631 (char*)&bufspace, sizeof(bufspace)); 632 633 (void)signal(SIGINT, prefinish); 634 635 #if defined(SIGINFO) && defined(NOKERNINFO) 636 if (tcgetattr (0, &ts) != -1) { 637 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 638 ts.c_lflag |= NOKERNINFO; 639 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 640 } 641 #endif 642 643 #ifdef SIGINFO 644 (void)signal(SIGINFO, prtsig); 645 #else 646 (void)signal(SIGQUIT, prtsig); 647 #endif 648 (void)signal(SIGCONT, prtsig); 649 650 /* fire off them quickies */ 651 for (i = 0; i < preload; i++) { 652 (void)gettimeofday(&now, 0); 653 pinger(); 654 } 655 656 doit(); 657 return 0; 658 } 659 660 661 static void 662 doit(void) 663 { 664 int cc; 665 struct sockaddr_in from; 666 int fromlen; 667 double sec, last, d_last; 668 struct pollfd fdmaskp[1]; 669 670 (void)gettimeofday(&clear_cache,0); 671 if (maxwait != 0) { 672 last = timeval_to_sec(&clear_cache) + maxwait; 673 d_last = 0; 674 } else { 675 last = 0; 676 d_last = 365*24*60*60; 677 } 678 679 do { 680 (void)gettimeofday(&now,0); 681 682 if (last != 0) 683 d_last = last - timeval_to_sec(&now); 684 685 if (ntransmitted < npackets && d_last > 0) { 686 /* send if within 100 usec or late for next packet */ 687 sec = diffsec(&next_tx,&now); 688 if (sec <= 0.0001 689 || (lastrcvd && (pingflags & F_FLOOD))) { 690 pinger(); 691 sec = diffsec(&next_tx,&now); 692 } 693 if (sec < 0.0) 694 sec = 0.0; 695 if (d_last < sec) 696 sec = d_last; 697 698 } else { 699 /* For the last response, wait twice as long as the 700 * worst case seen, or 10 times as long as the 701 * maximum interpacket interval, whichever is longer. 702 */ 703 sec = MAX(2*tmax,10*interval) - diffsec(&now,&last_tx); 704 if (d_last < sec) 705 sec = d_last; 706 if (sec <= 0) 707 break; 708 } 709 710 711 fdmaskp[0].fd = s; 712 fdmaskp[0].events = POLLIN; 713 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 714 if (cc <= 0) { 715 if (cc < 0) { 716 if (errno == EINTR) 717 continue; 718 jiggle_flush(1); 719 err(1, "poll"); 720 } 721 continue; 722 } 723 724 fromlen = sizeof(from); 725 cc = recvfrom(s, (char *) packet, packlen, 726 0, (struct sockaddr *)&from, 727 &fromlen); 728 if (cc < 0) { 729 if (errno != EINTR) { 730 jiggle_flush(1); 731 warn("recvfrom"); 732 (void)fflush(stderr); 733 } 734 continue; 735 } 736 (void)gettimeofday(&now, 0); 737 pr_pack(packet, cc, &from); 738 739 } while (nreceived < npackets 740 && (nreceived == 0 || !(pingflags & F_ONCE))); 741 742 finish(0); 743 } 744 745 746 static void 747 jiggle_flush(int nl) /* new line if there are dots */ 748 { 749 int serrno = errno; 750 751 if (jiggle_cnt > 0) { 752 total_jiggled += jiggle_cnt; 753 jiggle_direction = 1; 754 do { 755 (void)putchar('.'); 756 } while (--jiggle_cnt > 0); 757 758 } else if (jiggle_cnt < 0) { 759 total_jiggled -= jiggle_cnt; 760 jiggle_direction = -1; 761 do { 762 (void)putchar('\b'); 763 } while (++jiggle_cnt < 0); 764 } 765 766 if (nl) { 767 if (total_jiggled != 0) 768 (void)putchar('\n'); 769 total_jiggled = 0; 770 jiggle_direction = -1; 771 } 772 773 (void)fflush(stdout); 774 (void)fflush(stderr); 775 jiggle_time = now; 776 errno = serrno; 777 } 778 779 780 /* jiggle the cursor for flood-ping 781 */ 782 static void 783 jiggle(int delta) 784 { 785 double dt; 786 787 if (pingflags & F_QUIET) 788 return; 789 790 /* do not back up into messages */ 791 if (total_jiggled+jiggle_cnt+delta < 0) 792 return; 793 794 jiggle_cnt += delta; 795 796 /* flush the FLOOD dots when things are quiet 797 * or occassionally to make the cursor jiggle. 798 */ 799 dt = diffsec(&last_tx, &jiggle_time); 800 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 801 jiggle_flush(0); 802 } 803 804 805 /* 806 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 807 * will be added on by the kernel. The ID field is our UNIX process ID, 808 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 809 * of the data portion are used to hold a UNIX "timeval" struct in VAX 810 * byte-order, to compute the round-trip time. 811 */ 812 static void 813 pinger(void) 814 { 815 int i, cc, sw; 816 817 opack_icmp.icmp_code = 0; 818 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 819 820 /* clear the cached route in the kernel after an ICMP 821 * response such as a Redirect is seen to stop causing 822 * more such packets. Also clear the cached route 823 * periodically in case of routing changes that make 824 * black holes come and go. 825 */ 826 if (clear_cache.tv_sec != now.tv_sec) { 827 opack_icmp.icmp_type = ICMP_ECHOREPLY; 828 opack_icmp.icmp_id = ~ident; 829 opack_icmp.icmp_cksum = 0; 830 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 831 PHDR_LEN); 832 sw = 0; 833 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 834 (char *)&sw,sizeof(sw)) < 0) 835 err(1, "Can't turn off special IP header"); 836 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 837 (struct sockaddr *)&loc_addr, 838 sizeof(struct sockaddr_in)) < 0) { 839 /* 840 * XXX: we only report this as a warning in verbose 841 * mode because people get confused when they see 842 * this error when they are running in single user 843 * mode and they have not configured lo0 844 */ 845 if (pingflags & F_VERBOSE) 846 warn("failed to clear cached route"); 847 } 848 sw = 1; 849 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 850 (char *)&sw, sizeof(sw)) < 0) 851 err(1, "Can't set special IP header"); 852 853 (void)gettimeofday(&clear_cache,0); 854 } 855 856 opack_icmp.icmp_type = ICMP_ECHO; 857 opack_icmp.icmp_id = ident; 858 if (pingflags & F_TIMING) 859 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 860 cc = datalen+PHDR_LEN; 861 opack_icmp.icmp_cksum = 0; 862 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 863 864 cc += opack_ip->ip_hl<<2; 865 opack_ip->ip_len = cc; 866 i = sendto(s, (char *) opack_ip, cc, 0, 867 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 868 if (i != cc) { 869 jiggle_flush(1); 870 if (i < 0) 871 warn("sendto"); 872 else 873 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 874 (void)fflush(stderr); 875 } 876 lastrcvd = 0; 877 878 CLR(ntransmitted); 879 ntransmitted++; 880 881 last_tx = now; 882 if (next_tx.tv_sec == 0) { 883 first_tx = now; 884 next_tx = now; 885 } 886 887 /* Transmit regularly, at always the same microsecond in the 888 * second when going at one packet per second. 889 * If we are at most 100 ms behind, send extras to get caught up. 890 * Otherwise, skip packets we were too slow to send. 891 */ 892 if (diffsec(&next_tx, &now) <= interval) { 893 do { 894 timevaladd(&next_tx, &interval_tv); 895 } while (diffsec(&next_tx, &now) < -0.1); 896 } 897 898 if (pingflags & F_FLOOD) 899 jiggle(1); 900 901 /* While the packet is going out, ready buffer for the next 902 * packet. Use a fast but not very good random number generator. 903 */ 904 if (pingflags & F_PING_RANDOM) 905 rnd_fill(); 906 } 907 908 909 static void 910 pr_pack_sub(int cc, 911 char *addr, 912 int seqno, 913 int dupflag, 914 int ttl, 915 double triptime) 916 { 917 jiggle_flush(1); 918 919 if (pingflags & F_FLOOD) 920 return; 921 922 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 923 if (dupflag) 924 (void)printf(" DUP!"); 925 (void)printf(" ttl=%d", ttl); 926 if (pingflags & F_TIMING) 927 (void)printf(" time=%.3f ms", triptime*1000.0); 928 929 /* 930 * Send beep to stderr, since that's more likely than stdout 931 * to go to a terminal.. 932 */ 933 if (pingflags & F_AUDIBLE && !dupflag) 934 (void)fprintf(stderr,"\a"); 935 } 936 937 938 /* 939 * Print out the packet, if it came from us. This logic is necessary 940 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 941 * which arrive ('tis only fair). This permits multiple copies of this 942 * program to be run without having intermingled output (or statistics!). 943 */ 944 static void 945 pr_pack(u_char *buf, 946 int tot_len, 947 struct sockaddr_in *from) 948 { 949 struct ip *ip; 950 struct icmp *icp; 951 int i, j, net_len; 952 u_char *cp; 953 static int old_rrlen; 954 static char old_rr[MAX_IPOPTLEN]; 955 int hlen, dupflag = 0, dumped; 956 double triptime = 0.0; 957 #define PR_PACK_SUB() {if (!dumped) { \ 958 dumped = 1; \ 959 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 960 ntohs((u_int16_t)icp->icmp_seq), \ 961 dupflag, ip->ip_ttl, triptime);}} 962 963 /* Check the IP header */ 964 ip = (struct ip *) buf; 965 hlen = ip->ip_hl << 2; 966 if (tot_len < hlen + ICMP_MINLEN) { 967 if (pingflags & F_VERBOSE) { 968 jiggle_flush(1); 969 (void)printf("packet too short (%d bytes) from %s\n", 970 tot_len, inet_ntoa(from->sin_addr)); 971 } 972 return; 973 } 974 975 /* Now the ICMP part */ 976 dumped = 0; 977 net_len = tot_len - hlen; 978 icp = (struct icmp *)(buf + hlen); 979 if (icp->icmp_type == ICMP_ECHOREPLY 980 && icp->icmp_id == ident) { 981 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 982 lastrcvd = 1; 983 last_rx = now; 984 if (first_rx.tv_sec == 0) 985 first_rx = last_rx; 986 nreceived++; 987 if (pingflags & F_TIMING) { 988 struct timeval tv; 989 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 990 triptime = diffsec(&last_rx, &tv); 991 tsum += triptime; 992 tsumsq += triptime * triptime; 993 if (triptime < tmin) 994 tmin = triptime; 995 if (triptime > tmax) 996 tmax = triptime; 997 } 998 999 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1000 nrepeats++, nreceived--; 1001 dupflag=1; 1002 } else { 1003 SET(ntohs((u_int16_t)icp->icmp_seq)); 1004 } 1005 1006 if (tot_len != opack_ip->ip_len) { 1007 PR_PACK_SUB(); 1008 (void)printf("\nwrong total length %d instead of %d", 1009 tot_len, opack_ip->ip_len); 1010 } 1011 1012 if (!dupflag) { 1013 static u_int16_t last_seqno = 0xffff; 1014 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1015 u_int16_t gap = seqno - (last_seqno + 1); 1016 if (gap > 0 && gap < 0x8000 && 1017 (pingflags & F_VERBOSE)) { 1018 (void)printf("[*** sequence gap of %u " 1019 "packets from %u ... %u ***]\n", gap, 1020 (u_int16_t) (last_seqno + 1), 1021 (u_int16_t) (seqno - 1)); 1022 if (pingflags & F_QUIET) 1023 summary(0); 1024 } 1025 1026 if (gap < 0x8000) 1027 last_seqno = seqno; 1028 } 1029 1030 if (pingflags & F_QUIET) 1031 return; 1032 1033 if (!(pingflags & F_FLOOD)) 1034 PR_PACK_SUB(); 1035 1036 /* check the data */ 1037 if (datalen > PHDR_LEN 1038 && !(pingflags & F_PING_RANDOM) 1039 && memcmp(&icp->icmp_data[PHDR_LEN], 1040 &opack_icmp.icmp_data[PHDR_LEN], 1041 datalen-PHDR_LEN)) { 1042 for (i=PHDR_LEN; i<datalen; i++) { 1043 if (icp->icmp_data[i] != 1044 opack_icmp.icmp_data[i]) 1045 break; 1046 } 1047 PR_PACK_SUB(); 1048 (void)printf("\nwrong data byte #%d should have been" 1049 " %#x but was %#x", i, 1050 (u_char)opack_icmp.icmp_data[i], 1051 (u_char)icp->icmp_data[i]); 1052 for (i=PHDR_LEN; i<datalen; i++) { 1053 if ((i%16) == PHDR_LEN) 1054 (void)printf("\n\t"); 1055 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1056 } 1057 } 1058 1059 } else { 1060 if (!pr_icmph(icp, from, net_len)) 1061 return; 1062 dumped = 2; 1063 } 1064 1065 /* Display any IP options */ 1066 cp = buf + sizeof(struct ip); 1067 while (hlen > (int)sizeof(struct ip)) { 1068 switch (*cp) { 1069 case IPOPT_EOL: 1070 hlen = 0; 1071 break; 1072 case IPOPT_LSRR: 1073 hlen -= 2; 1074 j = *++cp; 1075 ++cp; 1076 j -= IPOPT_MINOFF; 1077 if (j <= 0) 1078 continue; 1079 if (dumped <= 1) { 1080 j = ((j+3)/4)*4; 1081 hlen -= j; 1082 cp += j; 1083 break; 1084 } 1085 PR_PACK_SUB(); 1086 (void)printf("\nLSRR: "); 1087 for (;;) { 1088 pr_saddr(cp); 1089 cp += 4; 1090 hlen -= 4; 1091 j -= 4; 1092 if (j <= 0) 1093 break; 1094 (void)putchar('\n'); 1095 } 1096 break; 1097 case IPOPT_RR: 1098 j = *++cp; /* get length */ 1099 i = *++cp; /* and pointer */ 1100 hlen -= 2; 1101 if (i > j) 1102 i = j; 1103 i -= IPOPT_MINOFF; 1104 if (i <= 0) 1105 continue; 1106 if (dumped <= 1) { 1107 if (i == old_rrlen 1108 && !memcmp(cp, old_rr, i)) { 1109 if (dumped) 1110 (void)printf("\t(same route)"); 1111 j = ((i+3)/4)*4; 1112 hlen -= j; 1113 cp += j; 1114 break; 1115 } 1116 old_rrlen = i; 1117 (void) memcpy(old_rr, cp, i); 1118 } 1119 if (!dumped) { 1120 jiggle_flush(1); 1121 (void)printf("RR: "); 1122 dumped = 1; 1123 } else { 1124 (void)printf("\nRR: "); 1125 } 1126 for (;;) { 1127 pr_saddr(cp); 1128 cp += 4; 1129 hlen -= 4; 1130 i -= 4; 1131 if (i <= 0) 1132 break; 1133 (void)putchar('\n'); 1134 } 1135 break; 1136 case IPOPT_NOP: 1137 if (dumped <= 1) 1138 break; 1139 PR_PACK_SUB(); 1140 (void)printf("\nNOP"); 1141 break; 1142 #ifdef sgi 1143 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1144 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1145 case IPOPT_CIPSO: /* Commercial IPSO */ 1146 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1147 i = (unsigned)cp[1]; 1148 hlen -= i - 1; 1149 PR_PACK_SUB(); 1150 (void)printf("\nSEC:"); 1151 while (i--) { 1152 (void)printf(" %02x", *cp++); 1153 } 1154 cp--; 1155 break; 1156 } 1157 #endif 1158 default: 1159 PR_PACK_SUB(); 1160 (void)printf("\nunknown option 0x%x", *cp); 1161 break; 1162 } 1163 hlen--; 1164 cp++; 1165 } 1166 1167 if (dumped) { 1168 (void)putchar('\n'); 1169 (void)fflush(stdout); 1170 } else { 1171 jiggle(-1); 1172 } 1173 } 1174 1175 1176 /* Compute the IP checksum 1177 * This assumes the packet is less than 32K long. 1178 */ 1179 static u_int16_t 1180 in_cksum(u_int16_t *p, u_int len) 1181 { 1182 u_int32_t sum = 0; 1183 int nwords = len >> 1; 1184 1185 while (nwords-- != 0) 1186 sum += *p++; 1187 1188 if (len & 1) { 1189 union { 1190 u_int16_t w; 1191 u_int8_t c[2]; 1192 } u; 1193 u.c[0] = *(u_char *)p; 1194 u.c[1] = 0; 1195 sum += u.w; 1196 } 1197 1198 /* end-around-carry */ 1199 sum = (sum >> 16) + (sum & 0xffff); 1200 sum += (sum >> 16); 1201 return (~sum); 1202 } 1203 1204 1205 /* 1206 * compute the difference of two timevals in seconds 1207 */ 1208 static double 1209 diffsec(struct timeval *timenow, 1210 struct timeval *then) 1211 { 1212 return ((timenow->tv_sec - then->tv_sec)*1.0 1213 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1214 } 1215 1216 1217 static void 1218 timevaladd(struct timeval *t1, 1219 struct timeval *t2) 1220 { 1221 1222 t1->tv_sec += t2->tv_sec; 1223 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1224 t1->tv_sec++; 1225 t1->tv_usec -= 1000000; 1226 } 1227 } 1228 1229 1230 static void 1231 sec_to_timeval(const double sec, struct timeval *tp) 1232 { 1233 tp->tv_sec = sec; 1234 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1235 } 1236 1237 1238 static double 1239 timeval_to_sec(const struct timeval *tp) 1240 { 1241 return tp->tv_sec + tp->tv_usec / 1000000.0; 1242 } 1243 1244 1245 /* 1246 * Print statistics. 1247 * Heavily buffered STDIO is used here, so that all the statistics 1248 * will be written with 1 sys-write call. This is nice when more 1249 * than one copy of the program is running on a terminal; it prevents 1250 * the statistics output from becomming intermingled. 1251 */ 1252 static void 1253 summary(int header) 1254 { 1255 jiggle_flush(1); 1256 1257 if (header) 1258 (void)printf("\n----%s PING Statistics----\n", hostname); 1259 (void)printf("%d packets transmitted, ", ntransmitted); 1260 (void)printf("%d packets received, ", nreceived); 1261 if (nrepeats) 1262 (void)printf("+%d duplicates, ", nrepeats); 1263 if (ntransmitted) { 1264 if (nreceived > ntransmitted) 1265 (void)printf("-- somebody's duplicating packets!"); 1266 else 1267 (void)printf("%.1f%% packet loss", 1268 (((ntransmitted-nreceived)*100.0) / 1269 ntransmitted)); 1270 } 1271 (void)printf("\n"); 1272 if (nreceived && (pingflags & F_TIMING)) { 1273 double n = nreceived + nrepeats; 1274 double avg = (tsum / n); 1275 double variance = 0.0; 1276 if (n>1) 1277 variance = (tsumsq - n*avg*avg) /(n-1); 1278 1279 printf("round-trip min/avg/max/stddev = " 1280 "%.3f/%.3f/%.3f/%.3f ms\n", 1281 tmin * 1000.0, avg * 1000.0, 1282 tmax * 1000.0, sqrt(variance) * 1000.0); 1283 if (pingflags & F_FLOOD) { 1284 double r = diffsec(&last_rx, &first_rx); 1285 double t = diffsec(&last_tx, &first_tx); 1286 if (r == 0) 1287 r = 0.0001; 1288 if (t == 0) 1289 t = 0.0001; 1290 (void)printf(" %.1f packets/sec sent, " 1291 " %.1f packets/sec received\n", 1292 ntransmitted/t, nreceived/r); 1293 } 1294 } 1295 } 1296 1297 1298 /* 1299 * Print statistics when SIGINFO is received. 1300 */ 1301 /* ARGSUSED */ 1302 static void 1303 prtsig(int dummy) 1304 { 1305 summary(0); 1306 #ifdef SIGINFO 1307 (void)signal(SIGINFO, prtsig); 1308 #else 1309 (void)signal(SIGQUIT, prtsig); 1310 #endif 1311 } 1312 1313 1314 /* 1315 * On the first SIGINT, allow any outstanding packets to dribble in 1316 */ 1317 static void 1318 prefinish(int dummy) 1319 { 1320 if (lastrcvd /* quit now if caught up */ 1321 || nreceived == 0) /* or if remote is dead */ 1322 finish(0); 1323 1324 (void)signal(dummy, finish); /* do this only the 1st time */ 1325 1326 if (npackets > ntransmitted) /* let the normal limit work */ 1327 npackets = ntransmitted; 1328 } 1329 1330 1331 /* 1332 * Print statistics and give up. 1333 */ 1334 /* ARGSUSED */ 1335 static void 1336 finish(int dummy) 1337 { 1338 #if defined(SIGINFO) && defined(NOKERNINFO) 1339 struct termios ts; 1340 1341 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1342 ts.c_lflag &= ~NOKERNINFO; 1343 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 1344 } 1345 (void)signal(SIGINFO, SIG_IGN); 1346 #else 1347 (void)signal(SIGQUIT, SIG_DFL); 1348 #endif 1349 1350 summary(1); 1351 exit(nreceived > 0 ? 0 : 2); 1352 } 1353 1354 1355 static int /* 0=do not print it */ 1356 ck_pr_icmph(struct icmp *icp, 1357 struct sockaddr_in *from, 1358 int cc, 1359 int override) /* 1=override VERBOSE if interesting */ 1360 { 1361 int hlen; 1362 struct ip ipb, *ip = &ipb; 1363 struct icmp icp2b, *icp2 = &icp2b; 1364 int res; 1365 1366 if (pingflags & F_VERBOSE) { 1367 res = 1; 1368 jiggle_flush(1); 1369 } else { 1370 res = 0; 1371 } 1372 1373 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1374 hlen = ip->ip_hl << 2; 1375 if (ip->ip_p == IPPROTO_ICMP 1376 && hlen + 6 <= cc) { 1377 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1378 if (icp2->icmp_id == ident) { 1379 /* remember to clear route cached in kernel 1380 * if this non-Echo-Reply ICMP message was for one 1381 * of our packets. 1382 */ 1383 clear_cache.tv_sec = 0; 1384 1385 if (!res && override 1386 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1387 jiggle_flush(1); 1388 (void)printf("%d bytes from %s: ", 1389 cc, pr_addr(&from->sin_addr)); 1390 res = 1; 1391 } 1392 } 1393 } 1394 1395 return res; 1396 } 1397 1398 1399 /* 1400 * Print a descriptive string about an ICMP header other than an echo reply. 1401 */ 1402 static int /* 0=printed nothing */ 1403 pr_icmph(struct icmp *icp, 1404 struct sockaddr_in *from, 1405 int cc) 1406 { 1407 switch (icp->icmp_type ) { 1408 case ICMP_UNREACH: 1409 if (!ck_pr_icmph(icp, from, cc, 1)) 1410 return 0; 1411 switch (icp->icmp_code) { 1412 case ICMP_UNREACH_NET: 1413 (void)printf("Destination Net Unreachable"); 1414 break; 1415 case ICMP_UNREACH_HOST: 1416 (void)printf("Destination Host Unreachable"); 1417 break; 1418 case ICMP_UNREACH_PROTOCOL: 1419 (void)printf("Destination Protocol Unreachable"); 1420 break; 1421 case ICMP_UNREACH_PORT: 1422 (void)printf("Destination Port Unreachable"); 1423 break; 1424 case ICMP_UNREACH_NEEDFRAG: 1425 (void)printf("frag needed and DF set. Next MTU=%d", 1426 ntohs(icp->icmp_nextmtu)); 1427 break; 1428 case ICMP_UNREACH_SRCFAIL: 1429 (void)printf("Source Route Failed"); 1430 break; 1431 case ICMP_UNREACH_NET_UNKNOWN: 1432 (void)printf("Unreachable unknown net"); 1433 break; 1434 case ICMP_UNREACH_HOST_UNKNOWN: 1435 (void)printf("Unreachable unknown host"); 1436 break; 1437 case ICMP_UNREACH_ISOLATED: 1438 (void)printf("Unreachable host isolated"); 1439 break; 1440 case ICMP_UNREACH_NET_PROHIB: 1441 (void)printf("Net prohibited access"); 1442 break; 1443 case ICMP_UNREACH_HOST_PROHIB: 1444 (void)printf("Host prohibited access"); 1445 break; 1446 case ICMP_UNREACH_TOSNET: 1447 (void)printf("Bad TOS for net"); 1448 break; 1449 case ICMP_UNREACH_TOSHOST: 1450 (void)printf("Bad TOS for host"); 1451 break; 1452 case 13: 1453 (void)printf("Communication prohibited"); 1454 break; 1455 case 14: 1456 (void)printf("Host precedence violation"); 1457 break; 1458 case 15: 1459 (void)printf("Precedence cutoff"); 1460 break; 1461 default: 1462 (void)printf("Bad Destination Unreachable Code: %d", 1463 icp->icmp_code); 1464 break; 1465 } 1466 /* Print returned IP header information */ 1467 pr_retip(icp, cc); 1468 break; 1469 1470 case ICMP_SOURCEQUENCH: 1471 if (!ck_pr_icmph(icp, from, cc, 1)) 1472 return 0; 1473 (void)printf("Source Quench"); 1474 pr_retip(icp, cc); 1475 break; 1476 1477 case ICMP_REDIRECT: 1478 if (!ck_pr_icmph(icp, from, cc, 1)) 1479 return 0; 1480 switch (icp->icmp_code) { 1481 case ICMP_REDIRECT_NET: 1482 (void)printf("Redirect Network"); 1483 break; 1484 case ICMP_REDIRECT_HOST: 1485 (void)printf("Redirect Host"); 1486 break; 1487 case ICMP_REDIRECT_TOSNET: 1488 (void)printf("Redirect Type of Service and Network"); 1489 break; 1490 case ICMP_REDIRECT_TOSHOST: 1491 (void)printf("Redirect Type of Service and Host"); 1492 break; 1493 default: 1494 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1495 break; 1496 } 1497 (void)printf(" New router addr: %s", 1498 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1499 pr_retip(icp, cc); 1500 break; 1501 1502 case ICMP_ECHO: 1503 if (!ck_pr_icmph(icp, from, cc, 0)) 1504 return 0; 1505 (void)printf("Echo Request: ID=%d seq=%d", 1506 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1507 break; 1508 1509 case ICMP_ECHOREPLY: 1510 /* displaying other's pings is too noisey */ 1511 #if 0 1512 if (!ck_pr_icmph(icp, from, cc, 0)) 1513 return 0; 1514 (void)printf("Echo Reply: ID=%d seq=%d", 1515 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1516 break; 1517 #else 1518 return 0; 1519 #endif 1520 1521 case ICMP_ROUTERADVERT: 1522 if (!ck_pr_icmph(icp, from, cc, 0)) 1523 return 0; 1524 (void)printf("Router Discovery Advert"); 1525 break; 1526 1527 case ICMP_ROUTERSOLICIT: 1528 if (!ck_pr_icmph(icp, from, cc, 0)) 1529 return 0; 1530 (void)printf("Router Discovery Solicit"); 1531 break; 1532 1533 case ICMP_TIMXCEED: 1534 if (!ck_pr_icmph(icp, from, cc, 1)) 1535 return 0; 1536 switch (icp->icmp_code ) { 1537 case ICMP_TIMXCEED_INTRANS: 1538 (void)printf("Time To Live exceeded"); 1539 break; 1540 case ICMP_TIMXCEED_REASS: 1541 (void)printf("Frag reassembly time exceeded"); 1542 break; 1543 default: 1544 (void)printf("Time exceeded, Bad Code: %d", 1545 icp->icmp_code); 1546 break; 1547 } 1548 pr_retip(icp, cc); 1549 break; 1550 1551 case ICMP_PARAMPROB: 1552 if (!ck_pr_icmph(icp, from, cc, 1)) 1553 return 0; 1554 (void)printf("Parameter problem: pointer = 0x%02x", 1555 icp->icmp_hun.ih_pptr); 1556 pr_retip(icp, cc); 1557 break; 1558 1559 case ICMP_TSTAMP: 1560 if (!ck_pr_icmph(icp, from, cc, 0)) 1561 return 0; 1562 (void)printf("Timestamp"); 1563 break; 1564 1565 case ICMP_TSTAMPREPLY: 1566 if (!ck_pr_icmph(icp, from, cc, 0)) 1567 return 0; 1568 (void)printf("Timestamp Reply"); 1569 break; 1570 1571 case ICMP_IREQ: 1572 if (!ck_pr_icmph(icp, from, cc, 0)) 1573 return 0; 1574 (void)printf("Information Request"); 1575 break; 1576 1577 case ICMP_IREQREPLY: 1578 if (!ck_pr_icmph(icp, from, cc, 0)) 1579 return 0; 1580 (void)printf("Information Reply"); 1581 break; 1582 1583 case ICMP_MASKREQ: 1584 if (!ck_pr_icmph(icp, from, cc, 0)) 1585 return 0; 1586 (void)printf("Address Mask Request"); 1587 break; 1588 1589 case ICMP_MASKREPLY: 1590 if (!ck_pr_icmph(icp, from, cc, 0)) 1591 return 0; 1592 (void)printf("Address Mask Reply"); 1593 break; 1594 1595 default: 1596 if (!ck_pr_icmph(icp, from, cc, 0)) 1597 return 0; 1598 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1599 if (pingflags & F_VERBOSE) 1600 pr_iph(icp, cc); 1601 } 1602 1603 return 1; 1604 } 1605 1606 1607 /* 1608 * Print an IP header with options. 1609 */ 1610 static void 1611 pr_iph(struct icmp *icp, 1612 int cc) 1613 { 1614 int hlen; 1615 u_char *cp; 1616 struct ip ipb, *ip = &ipb; 1617 1618 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1619 1620 hlen = ip->ip_hl << 2; 1621 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1622 1623 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1624 (void)printf(" %1x %1x %02x %04x %04x", 1625 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1626 (void)printf(" %1x %04x", 1627 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1628 (void)printf(" %02x %02x %04x", 1629 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1630 (void)printf(" %15s ", 1631 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1632 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1633 /* dump any option bytes */ 1634 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1635 (void)printf("%02x", *cp++); 1636 } 1637 } 1638 1639 /* 1640 * Print an ASCII host address starting from a string of bytes. 1641 */ 1642 static void 1643 pr_saddr(u_char *cp) 1644 { 1645 n_long l; 1646 struct in_addr addr; 1647 1648 l = (u_char)*++cp; 1649 l = (l<<8) + (u_char)*++cp; 1650 l = (l<<8) + (u_char)*++cp; 1651 l = (l<<8) + (u_char)*++cp; 1652 addr.s_addr = htonl(l); 1653 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1654 } 1655 1656 1657 /* 1658 * Return an ASCII host address 1659 * as a dotted quad and optionally with a hostname 1660 */ 1661 static char * 1662 pr_addr(struct in_addr *addr) /* in network order */ 1663 { 1664 struct hostent *hp; 1665 static char buf[MAXHOSTNAMELEN+4+16+1]; 1666 1667 if ((pingflags & F_NUMERIC) 1668 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1669 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1670 } else { 1671 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1672 inet_ntoa(*addr)); 1673 } 1674 1675 return buf; 1676 } 1677 1678 /* 1679 * Dump some info on a returned (via ICMP) IP packet. 1680 */ 1681 static void 1682 pr_retip(struct icmp *icp, 1683 int cc) 1684 { 1685 int hlen; 1686 u_char *cp; 1687 struct ip ipb, *ip = &ipb; 1688 1689 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1690 1691 if (pingflags & F_VERBOSE) 1692 pr_iph(icp, cc); 1693 1694 hlen = ip->ip_hl << 2; 1695 cp = (u_char *) &icp->icmp_data[hlen]; 1696 1697 if (ip->ip_p == IPPROTO_TCP) { 1698 if (pingflags & F_VERBOSE) 1699 (void)printf("\n TCP: from port %u, to port %u", 1700 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1701 } else if (ip->ip_p == IPPROTO_UDP) { 1702 if (pingflags & F_VERBOSE) 1703 (void)printf("\n UDP: from port %u, to port %u", 1704 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1705 } else if (ip->ip_p == IPPROTO_ICMP) { 1706 struct icmp icp2; 1707 (void) memcpy(&icp2, cp, sizeof(icp2)); 1708 if (icp2.icmp_type == ICMP_ECHO) { 1709 if (pingflags & F_VERBOSE) 1710 (void)printf("\n ID=%u icmp_seq=%u", 1711 ntohs((u_int16_t)icp2.icmp_id), 1712 ntohs((u_int16_t)icp2.icmp_seq)); 1713 else 1714 (void)printf(" for icmp_seq=%u", 1715 ntohs((u_int16_t)icp2.icmp_seq)); 1716 } 1717 } 1718 } 1719 1720 static void 1721 fill(void) 1722 { 1723 int i, j, k; 1724 char *cp; 1725 int pat[16]; 1726 1727 for (cp = fill_pat; *cp != '\0'; cp++) { 1728 if (!isxdigit((unsigned char)*cp)) 1729 break; 1730 } 1731 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1732 (void)fflush(stdout); 1733 errx(1, "\"-p %s\": patterns must be specified with" 1734 " 1-32 hex digits\n", 1735 fill_pat); 1736 } 1737 1738 i = sscanf(fill_pat, 1739 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1740 &pat[0], &pat[1], &pat[2], &pat[3], 1741 &pat[4], &pat[5], &pat[6], &pat[7], 1742 &pat[8], &pat[9], &pat[10], &pat[11], 1743 &pat[12], &pat[13], &pat[14], &pat[15]); 1744 1745 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1746 opack_icmp.icmp_data[k] = pat[j]; 1747 if (++j >= i) 1748 j = 0; 1749 } 1750 1751 if (!(pingflags & F_QUIET)) { 1752 (void)printf("PATTERN: 0x"); 1753 for (j=0; j<i; j++) 1754 (void)printf("%02x", 1755 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1756 (void)printf("\n"); 1757 } 1758 1759 } 1760 1761 1762 static void 1763 rnd_fill(void) 1764 { 1765 static u_int32_t rnd; 1766 int i; 1767 1768 for (i = PHDR_LEN; i < datalen; i++) { 1769 rnd = (3141592621U * rnd + 663896637U); 1770 opack_icmp.icmp_data[i] = rnd>>24; 1771 } 1772 } 1773 1774 1775 static void 1776 gethost(const char *arg, 1777 const char *name, 1778 struct sockaddr_in *sa, 1779 char *realname, 1780 int realname_len) 1781 { 1782 struct hostent *hp; 1783 1784 (void)memset(sa, 0, sizeof(*sa)); 1785 sa->sin_family = AF_INET; 1786 sa->sin_len = sizeof(struct sockaddr_in); 1787 1788 /* If it is an IP address, try to convert it to a name to 1789 * have something nice to display. 1790 */ 1791 if (inet_aton(name, &sa->sin_addr) != 0) { 1792 if (realname) { 1793 if (pingflags & F_NUMERIC) 1794 hp = 0; 1795 else 1796 hp = gethostbyaddr((char *)&sa->sin_addr, 1797 sizeof(sa->sin_addr), 1798 AF_INET); 1799 (void)strlcpy(realname, hp ? hp->h_name : name, 1800 realname_len); 1801 } 1802 return; 1803 } 1804 1805 hp = gethostbyname(name); 1806 if (!hp) 1807 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1808 1809 if (hp->h_addrtype != AF_INET) 1810 errx(1, "%s only supported with IP", arg); 1811 1812 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1813 1814 if (realname) 1815 (void)strlcpy(realname, hp->h_name, realname_len); 1816 } 1817 1818 1819 static void 1820 usage(void) 1821 { 1822 #ifdef IPSEC 1823 #ifdef IPSEC_POLICY_IPSEC 1824 #define IPSECOPT "\n [-E policy] " 1825 #else 1826 #define IPSECOPT "\n [-AE] " 1827 #endif /*IPSEC_POLICY_IPSEC*/ 1828 #else 1829 #define IPSECOPT "" 1830 #endif /*IPSEC*/ 1831 1832 (void)fprintf(stderr, "Usage: \n" 1833 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1834 " [-i interval] [-I addr]\n" 1835 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1836 " [-w maxwait] " IPSECOPT "host\n", 1837 getprogname()); 1838 exit(1); 1839 } 1840
Indexes created Tue Sep 30 20:09:53 GMT 2025