ping.c revision 1.72
1 /* $NetBSD: ping.c,v 1.72 2003/04/14 10:18:37 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 1.72 2003/04/14 10:18:37 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 if (!policy_in) 384 err(1, "strdup"); 385 } else if (!strncmp("out", optarg, 3)) { 386 policy_out = strdup(optarg); 387 if (!policy_out) 388 err(1, "strdup"); 389 } else 390 errx(1, "invalid security policy"); 391 break; 392 #else 393 case 'A': 394 pingflags |= F_AUTHHDR; 395 break; 396 case 'E': 397 pingflags |= F_ENCRYPT; 398 break; 399 #endif /*IPSEC_POLICY_IPSEC*/ 400 #endif /*IPSEC*/ 401 default: 402 usage(); 403 break; 404 } 405 } 406 407 if (interval == 0) 408 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 409 #ifndef sgi 410 if (pingflags & F_FLOOD && getuid()) 411 errx(1, "Must be superuser to use -f"); 412 if (interval < 1.0 && getuid()) 413 errx(1, "Must be superuser to use < 1 sec ping interval"); 414 if (preload > 0 && getuid()) 415 errx(1, "Must be superuser to use -l"); 416 #endif 417 sec_to_timeval(interval, &interval_tv); 418 419 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 420 warnx("Sorry, no audible output for flood pings"); 421 422 if (npackets != 0) { 423 npackets += preload; 424 } else { 425 npackets = INT_MAX; 426 } 427 428 if (hostind == 0) { 429 if (optind != argc-1) 430 usage(); 431 else 432 hostind = optind; 433 } 434 else if (hostind >= argc - 1) 435 usage(); 436 437 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 438 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 439 pingflags |= F_MCAST; 440 if (!(pingflags & F_SOURCE_ROUTE)) 441 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 442 443 loc_addr.sin_family = AF_INET; 444 loc_addr.sin_len = sizeof(struct sockaddr_in); 445 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 446 447 if (datalen >= PHDR_LEN) /* can we time them? */ 448 pingflags |= F_TIMING; 449 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 450 if ((packet = (u_char *)malloc(packlen)) == NULL) 451 err(1, "Out of memory"); 452 453 if (pingflags & F_PING_FILLED) { 454 fill(); 455 } else if (pingflags & F_PING_RANDOM) { 456 rnd_fill(); 457 } else { 458 for (i = PHDR_LEN; i < datalen; i++) 459 opack_icmp.icmp_data[i] = i; 460 } 461 462 ident = htons(getpid()) & 0xFFFF; 463 464 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 465 err(1, "Cannot create socket"); 466 if (options & SO_DEBUG) { 467 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 468 (char *)&on, sizeof(on)) == -1) 469 warn("Can't turn on socket debugging"); 470 } 471 if (options & SO_DONTROUTE) { 472 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 473 (char *)&on, sizeof(on)) == -1) 474 warn("SO_DONTROUTE"); 475 } 476 477 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 478 err(1, "Cannot create socket"); 479 if (options & SO_DEBUG) { 480 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 481 (char *)&on, sizeof(on)) == -1) 482 warn("Can't turn on socket debugging"); 483 } 484 if (options & SO_DONTROUTE) { 485 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 486 (char *)&on, sizeof(on)) == -1) 487 warn("SO_DONTROUTE"); 488 } 489 490 if (pingflags & F_SOURCE_ROUTE) { 491 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 492 optspace[IPOPT_OLEN] = optlen = 7; 493 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 494 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 495 sizeof(whereto.sin_addr)); 496 optspace[optlen++] = IPOPT_NOP; 497 } 498 if (pingflags & F_RECORD_ROUTE) { 499 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 500 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 501 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 502 optlen = MAX_IPOPTLEN; 503 } 504 /* this leaves opack_ip 0(mod 4) aligned */ 505 opack_ip = (struct ip *)((char *)&out_pack.o_ip 506 + sizeof(out_pack.o_opt) 507 - optlen); 508 (void) memcpy(opack_ip + 1, optspace, optlen); 509 510 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 511 err(1, "Can't set special IP header"); 512 513 opack_ip->ip_v = IPVERSION; 514 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 515 opack_ip->ip_tos = tos; 516 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 517 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 518 opack_ip->ip_p = IPPROTO_ICMP; 519 opack_ip->ip_src = src_addr.sin_addr; 520 opack_ip->ip_dst = send_addr.sin_addr; 521 522 if (pingflags & F_MCAST) { 523 if (pingflags & F_MCAST_NOLOOP) { 524 u_char loop = 0; 525 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 526 (char *) &loop, 1) < 0) 527 err(1, "Can't disable multicast loopback"); 528 } 529 530 if (ttl != 0 531 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 532 (char *) &ttl, 1) < 0) 533 err(1, "Can't set multicast time-to-live"); 534 535 if ((pingflags & F_SOURCE_ADDR) 536 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 537 (char *) &src_addr.sin_addr, 538 sizeof(src_addr.sin_addr)) < 0) 539 err(1, "Can't set multicast source interface"); 540 541 } else if (pingflags & F_SOURCE_ADDR) { 542 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 543 (char *) &src_addr.sin_addr, 544 sizeof(src_addr.sin_addr)) < 0) 545 err(1, "Can't set source interface/address"); 546 } 547 #ifdef IPSEC 548 #ifdef IPSEC_POLICY_IPSEC 549 { 550 char *buf; 551 if (pingflags & F_POLICY) { 552 if (policy_in != NULL) { 553 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 554 if (buf == NULL) 555 errx(1, "%s", ipsec_strerror()); 556 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 557 buf, ipsec_get_policylen(buf)) < 0) { 558 err(1, "ipsec policy cannot be configured"); 559 } 560 free(buf); 561 } 562 if (policy_out != NULL) { 563 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 564 if (buf == NULL) 565 errx(1, "%s", ipsec_strerror()); 566 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 567 buf, ipsec_get_policylen(buf)) < 0) { 568 err(1, "ipsec policy cannot be configured"); 569 } 570 free(buf); 571 } 572 } 573 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 574 if (buf == NULL) 575 errx(1, "%s", ipsec_strerror()); 576 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 577 buf, ipsec_get_policylen(buf)) < 0) { 578 #if 0 579 warnx("ipsec is not configured"); 580 #else 581 /* ignore it, should be okay */ 582 #endif 583 } 584 free(buf); 585 } 586 #else 587 { 588 int optval; 589 if (pingflags & F_AUTHHDR) { 590 optval = IPSEC_LEVEL_REQUIRE; 591 #ifdef IP_AUTH_TRANS_LEVEL 592 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 593 (char *)&optval, sizeof(optval)); 594 #else 595 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 596 (char *)&optval, sizeof(optval)); 597 #endif 598 } 599 if (pingflags & F_ENCRYPT) { 600 optval = IPSEC_LEVEL_REQUIRE; 601 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 602 (char *)&optval, sizeof(optval)); 603 } 604 optval = IPSEC_LEVEL_BYPASS; 605 #ifdef IP_AUTH_TRANS_LEVEL 606 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 607 (char *)&optval, sizeof(optval)); 608 #else 609 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 610 (char *)&optval, sizeof(optval)); 611 #endif 612 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 613 (char *)&optval, sizeof(optval)); 614 } 615 #endif /*IPSEC_POLICY_IPSEC*/ 616 #endif /*IPSEC*/ 617 618 (void)printf("PING %s (%s): %d data bytes\n", hostname, 619 inet_ntoa(whereto.sin_addr), datalen); 620 621 /* When pinging the broadcast address, you can get a lot 622 * of answers. Doing something so evil is useful if you 623 * are trying to stress the ethernet, or just want to 624 * fill the arp cache to get some stuff for /etc/ethers. 625 */ 626 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 627 (char*)&bufspace, sizeof(bufspace))) { 628 if ((bufspace -= 4096) <= 0) 629 err(1, "Cannot set the receive buffer size"); 630 } 631 632 /* make it possible to send giant probes, but do not worry now 633 * if it fails, since we probably won't send giant probes. 634 */ 635 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 636 (char*)&bufspace, sizeof(bufspace)); 637 638 (void)signal(SIGINT, prefinish); 639 640 #if defined(SIGINFO) && defined(NOKERNINFO) 641 if (tcgetattr (0, &ts) != -1) { 642 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 643 ts.c_lflag |= NOKERNINFO; 644 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 645 } 646 #endif 647 648 #ifdef SIGINFO 649 (void)signal(SIGINFO, prtsig); 650 #else 651 (void)signal(SIGQUIT, prtsig); 652 #endif 653 (void)signal(SIGCONT, prtsig); 654 655 /* fire off them quickies */ 656 for (i = 0; i < preload; i++) { 657 (void)gettimeofday(&now, 0); 658 pinger(); 659 } 660 661 doit(); 662 return 0; 663 } 664 665 666 static void 667 doit(void) 668 { 669 int cc; 670 struct sockaddr_in from; 671 int fromlen; 672 double sec, last, d_last; 673 struct pollfd fdmaskp[1]; 674 675 (void)gettimeofday(&clear_cache,0); 676 if (maxwait != 0) { 677 last = timeval_to_sec(&clear_cache) + maxwait; 678 d_last = 0; 679 } else { 680 last = 0; 681 d_last = 365*24*60*60; 682 } 683 684 do { 685 (void)gettimeofday(&now,0); 686 687 if (last != 0) 688 d_last = last - timeval_to_sec(&now); 689 690 if (ntransmitted < npackets && d_last > 0) { 691 /* send if within 100 usec or late for next packet */ 692 sec = diffsec(&next_tx,&now); 693 if (sec <= 0.0001 694 || (lastrcvd && (pingflags & F_FLOOD))) { 695 pinger(); 696 sec = diffsec(&next_tx,&now); 697 } 698 if (sec < 0.0) 699 sec = 0.0; 700 if (d_last < sec) 701 sec = d_last; 702 703 } else { 704 /* For the last response, wait twice as long as the 705 * worst case seen, or 10 times as long as the 706 * maximum interpacket interval, whichever is longer. 707 */ 708 sec = MAX(2*tmax,10*interval) - diffsec(&now,&last_tx); 709 if (d_last < sec) 710 sec = d_last; 711 if (sec <= 0) 712 break; 713 } 714 715 716 fdmaskp[0].fd = s; 717 fdmaskp[0].events = POLLIN; 718 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 719 if (cc <= 0) { 720 if (cc < 0) { 721 if (errno == EINTR) 722 continue; 723 jiggle_flush(1); 724 err(1, "poll"); 725 } 726 continue; 727 } 728 729 fromlen = sizeof(from); 730 cc = recvfrom(s, (char *) packet, packlen, 731 0, (struct sockaddr *)&from, 732 &fromlen); 733 if (cc < 0) { 734 if (errno != EINTR) { 735 jiggle_flush(1); 736 warn("recvfrom"); 737 (void)fflush(stderr); 738 } 739 continue; 740 } 741 (void)gettimeofday(&now, 0); 742 pr_pack(packet, cc, &from); 743 744 } while (nreceived < npackets 745 && (nreceived == 0 || !(pingflags & F_ONCE))); 746 747 finish(0); 748 } 749 750 751 static void 752 jiggle_flush(int nl) /* new line if there are dots */ 753 { 754 int serrno = errno; 755 756 if (jiggle_cnt > 0) { 757 total_jiggled += jiggle_cnt; 758 jiggle_direction = 1; 759 do { 760 (void)putchar('.'); 761 } while (--jiggle_cnt > 0); 762 763 } else if (jiggle_cnt < 0) { 764 total_jiggled -= jiggle_cnt; 765 jiggle_direction = -1; 766 do { 767 (void)putchar('\b'); 768 } while (++jiggle_cnt < 0); 769 } 770 771 if (nl) { 772 if (total_jiggled != 0) 773 (void)putchar('\n'); 774 total_jiggled = 0; 775 jiggle_direction = -1; 776 } 777 778 (void)fflush(stdout); 779 (void)fflush(stderr); 780 jiggle_time = now; 781 errno = serrno; 782 } 783 784 785 /* jiggle the cursor for flood-ping 786 */ 787 static void 788 jiggle(int delta) 789 { 790 double dt; 791 792 if (pingflags & F_QUIET) 793 return; 794 795 /* do not back up into messages */ 796 if (total_jiggled+jiggle_cnt+delta < 0) 797 return; 798 799 jiggle_cnt += delta; 800 801 /* flush the FLOOD dots when things are quiet 802 * or occassionally to make the cursor jiggle. 803 */ 804 dt = diffsec(&last_tx, &jiggle_time); 805 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 806 jiggle_flush(0); 807 } 808 809 810 /* 811 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 812 * will be added on by the kernel. The ID field is our UNIX process ID, 813 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 814 * of the data portion are used to hold a UNIX "timeval" struct in VAX 815 * byte-order, to compute the round-trip time. 816 */ 817 static void 818 pinger(void) 819 { 820 int i, cc, sw; 821 822 opack_icmp.icmp_code = 0; 823 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 824 825 /* clear the cached route in the kernel after an ICMP 826 * response such as a Redirect is seen to stop causing 827 * more such packets. Also clear the cached route 828 * periodically in case of routing changes that make 829 * black holes come and go. 830 */ 831 if (clear_cache.tv_sec != now.tv_sec) { 832 opack_icmp.icmp_type = ICMP_ECHOREPLY; 833 opack_icmp.icmp_id = ~ident; 834 opack_icmp.icmp_cksum = 0; 835 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 836 PHDR_LEN); 837 sw = 0; 838 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 839 (char *)&sw,sizeof(sw)) < 0) 840 err(1, "Can't turn off special IP header"); 841 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 842 (struct sockaddr *)&loc_addr, 843 sizeof(struct sockaddr_in)) < 0) { 844 /* 845 * XXX: we only report this as a warning in verbose 846 * mode because people get confused when they see 847 * this error when they are running in single user 848 * mode and they have not configured lo0 849 */ 850 if (pingflags & F_VERBOSE) 851 warn("failed to clear cached route"); 852 } 853 sw = 1; 854 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 855 (char *)&sw, sizeof(sw)) < 0) 856 err(1, "Can't set special IP header"); 857 858 (void)gettimeofday(&clear_cache,0); 859 } 860 861 opack_icmp.icmp_type = ICMP_ECHO; 862 opack_icmp.icmp_id = ident; 863 if (pingflags & F_TIMING) 864 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 865 cc = datalen+PHDR_LEN; 866 opack_icmp.icmp_cksum = 0; 867 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 868 869 cc += opack_ip->ip_hl<<2; 870 opack_ip->ip_len = cc; 871 i = sendto(s, (char *) opack_ip, cc, 0, 872 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 873 if (i != cc) { 874 jiggle_flush(1); 875 if (i < 0) 876 warn("sendto"); 877 else 878 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 879 (void)fflush(stderr); 880 } 881 lastrcvd = 0; 882 883 CLR(ntransmitted); 884 ntransmitted++; 885 886 last_tx = now; 887 if (next_tx.tv_sec == 0) { 888 first_tx = now; 889 next_tx = now; 890 } 891 892 /* Transmit regularly, at always the same microsecond in the 893 * second when going at one packet per second. 894 * If we are at most 100 ms behind, send extras to get caught up. 895 * Otherwise, skip packets we were too slow to send. 896 */ 897 if (diffsec(&next_tx, &now) <= interval) { 898 do { 899 timevaladd(&next_tx, &interval_tv); 900 } while (diffsec(&next_tx, &now) < -0.1); 901 } 902 903 if (pingflags & F_FLOOD) 904 jiggle(1); 905 906 /* While the packet is going out, ready buffer for the next 907 * packet. Use a fast but not very good random number generator. 908 */ 909 if (pingflags & F_PING_RANDOM) 910 rnd_fill(); 911 } 912 913 914 static void 915 pr_pack_sub(int cc, 916 char *addr, 917 int seqno, 918 int dupflag, 919 int ttl, 920 double triptime) 921 { 922 jiggle_flush(1); 923 924 if (pingflags & F_FLOOD) 925 return; 926 927 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 928 if (dupflag) 929 (void)printf(" DUP!"); 930 (void)printf(" ttl=%d", ttl); 931 if (pingflags & F_TIMING) 932 (void)printf(" time=%.3f ms", triptime*1000.0); 933 934 /* 935 * Send beep to stderr, since that's more likely than stdout 936 * to go to a terminal.. 937 */ 938 if (pingflags & F_AUDIBLE && !dupflag) 939 (void)fprintf(stderr,"\a"); 940 } 941 942 943 /* 944 * Print out the packet, if it came from us. This logic is necessary 945 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 946 * which arrive ('tis only fair). This permits multiple copies of this 947 * program to be run without having intermingled output (or statistics!). 948 */ 949 static void 950 pr_pack(u_char *buf, 951 int tot_len, 952 struct sockaddr_in *from) 953 { 954 struct ip *ip; 955 struct icmp *icp; 956 int i, j, net_len; 957 u_char *cp; 958 static int old_rrlen; 959 static char old_rr[MAX_IPOPTLEN]; 960 int hlen, dupflag = 0, dumped; 961 double triptime = 0.0; 962 #define PR_PACK_SUB() {if (!dumped) { \ 963 dumped = 1; \ 964 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 965 ntohs((u_int16_t)icp->icmp_seq), \ 966 dupflag, ip->ip_ttl, triptime);}} 967 968 /* Check the IP header */ 969 ip = (struct ip *) buf; 970 hlen = ip->ip_hl << 2; 971 if (tot_len < hlen + ICMP_MINLEN) { 972 if (pingflags & F_VERBOSE) { 973 jiggle_flush(1); 974 (void)printf("packet too short (%d bytes) from %s\n", 975 tot_len, inet_ntoa(from->sin_addr)); 976 } 977 return; 978 } 979 980 /* Now the ICMP part */ 981 dumped = 0; 982 net_len = tot_len - hlen; 983 icp = (struct icmp *)(buf + hlen); 984 if (icp->icmp_type == ICMP_ECHOREPLY 985 && icp->icmp_id == ident) { 986 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 987 lastrcvd = 1; 988 last_rx = now; 989 if (first_rx.tv_sec == 0) 990 first_rx = last_rx; 991 nreceived++; 992 if (pingflags & F_TIMING) { 993 struct timeval tv; 994 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 995 triptime = diffsec(&last_rx, &tv); 996 tsum += triptime; 997 tsumsq += triptime * triptime; 998 if (triptime < tmin) 999 tmin = triptime; 1000 if (triptime > tmax) 1001 tmax = triptime; 1002 } 1003 1004 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1005 nrepeats++, nreceived--; 1006 dupflag=1; 1007 } else { 1008 SET(ntohs((u_int16_t)icp->icmp_seq)); 1009 } 1010 1011 if (tot_len != opack_ip->ip_len) { 1012 PR_PACK_SUB(); 1013 (void)printf("\nwrong total length %d instead of %d", 1014 tot_len, opack_ip->ip_len); 1015 } 1016 1017 if (!dupflag) { 1018 static u_int16_t last_seqno = 0xffff; 1019 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1020 u_int16_t gap = seqno - (last_seqno + 1); 1021 if (gap > 0 && gap < 0x8000 && 1022 (pingflags & F_VERBOSE)) { 1023 (void)printf("[*** sequence gap of %u " 1024 "packets from %u ... %u ***]\n", gap, 1025 (u_int16_t) (last_seqno + 1), 1026 (u_int16_t) (seqno - 1)); 1027 if (pingflags & F_QUIET) 1028 summary(0); 1029 } 1030 1031 if (gap < 0x8000) 1032 last_seqno = seqno; 1033 } 1034 1035 if (pingflags & F_QUIET) 1036 return; 1037 1038 if (!(pingflags & F_FLOOD)) 1039 PR_PACK_SUB(); 1040 1041 /* check the data */ 1042 if (datalen > PHDR_LEN 1043 && !(pingflags & F_PING_RANDOM) 1044 && memcmp(&icp->icmp_data[PHDR_LEN], 1045 &opack_icmp.icmp_data[PHDR_LEN], 1046 datalen-PHDR_LEN)) { 1047 for (i=PHDR_LEN; i<datalen; i++) { 1048 if (icp->icmp_data[i] != 1049 opack_icmp.icmp_data[i]) 1050 break; 1051 } 1052 PR_PACK_SUB(); 1053 (void)printf("\nwrong data byte #%d should have been" 1054 " %#x but was %#x", i, 1055 (u_char)opack_icmp.icmp_data[i], 1056 (u_char)icp->icmp_data[i]); 1057 for (i=PHDR_LEN; i<datalen; i++) { 1058 if ((i%16) == PHDR_LEN) 1059 (void)printf("\n\t"); 1060 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1061 } 1062 } 1063 1064 } else { 1065 if (!pr_icmph(icp, from, net_len)) 1066 return; 1067 dumped = 2; 1068 } 1069 1070 /* Display any IP options */ 1071 cp = buf + sizeof(struct ip); 1072 while (hlen > (int)sizeof(struct ip)) { 1073 switch (*cp) { 1074 case IPOPT_EOL: 1075 hlen = 0; 1076 break; 1077 case IPOPT_LSRR: 1078 hlen -= 2; 1079 j = *++cp; 1080 ++cp; 1081 j -= IPOPT_MINOFF; 1082 if (j <= 0) 1083 continue; 1084 if (dumped <= 1) { 1085 j = ((j+3)/4)*4; 1086 hlen -= j; 1087 cp += j; 1088 break; 1089 } 1090 PR_PACK_SUB(); 1091 (void)printf("\nLSRR: "); 1092 for (;;) { 1093 pr_saddr(cp); 1094 cp += 4; 1095 hlen -= 4; 1096 j -= 4; 1097 if (j <= 0) 1098 break; 1099 (void)putchar('\n'); 1100 } 1101 break; 1102 case IPOPT_RR: 1103 j = *++cp; /* get length */ 1104 i = *++cp; /* and pointer */ 1105 hlen -= 2; 1106 if (i > j) 1107 i = j; 1108 i -= IPOPT_MINOFF; 1109 if (i <= 0) 1110 continue; 1111 if (dumped <= 1) { 1112 if (i == old_rrlen 1113 && !memcmp(cp, old_rr, i)) { 1114 if (dumped) 1115 (void)printf("\t(same route)"); 1116 j = ((i+3)/4)*4; 1117 hlen -= j; 1118 cp += j; 1119 break; 1120 } 1121 old_rrlen = i; 1122 (void) memcpy(old_rr, cp, i); 1123 } 1124 if (!dumped) { 1125 jiggle_flush(1); 1126 (void)printf("RR: "); 1127 dumped = 1; 1128 } else { 1129 (void)printf("\nRR: "); 1130 } 1131 for (;;) { 1132 pr_saddr(cp); 1133 cp += 4; 1134 hlen -= 4; 1135 i -= 4; 1136 if (i <= 0) 1137 break; 1138 (void)putchar('\n'); 1139 } 1140 break; 1141 case IPOPT_NOP: 1142 if (dumped <= 1) 1143 break; 1144 PR_PACK_SUB(); 1145 (void)printf("\nNOP"); 1146 break; 1147 #ifdef sgi 1148 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1149 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1150 case IPOPT_CIPSO: /* Commercial IPSO */ 1151 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1152 i = (unsigned)cp[1]; 1153 hlen -= i - 1; 1154 PR_PACK_SUB(); 1155 (void)printf("\nSEC:"); 1156 while (i--) { 1157 (void)printf(" %02x", *cp++); 1158 } 1159 cp--; 1160 break; 1161 } 1162 #endif 1163 default: 1164 PR_PACK_SUB(); 1165 (void)printf("\nunknown option 0x%x", *cp); 1166 break; 1167 } 1168 hlen--; 1169 cp++; 1170 } 1171 1172 if (dumped) { 1173 (void)putchar('\n'); 1174 (void)fflush(stdout); 1175 } else { 1176 jiggle(-1); 1177 } 1178 } 1179 1180 1181 /* Compute the IP checksum 1182 * This assumes the packet is less than 32K long. 1183 */ 1184 static u_int16_t 1185 in_cksum(u_int16_t *p, u_int len) 1186 { 1187 u_int32_t sum = 0; 1188 int nwords = len >> 1; 1189 1190 while (nwords-- != 0) 1191 sum += *p++; 1192 1193 if (len & 1) { 1194 union { 1195 u_int16_t w; 1196 u_int8_t c[2]; 1197 } u; 1198 u.c[0] = *(u_char *)p; 1199 u.c[1] = 0; 1200 sum += u.w; 1201 } 1202 1203 /* end-around-carry */ 1204 sum = (sum >> 16) + (sum & 0xffff); 1205 sum += (sum >> 16); 1206 return (~sum); 1207 } 1208 1209 1210 /* 1211 * compute the difference of two timevals in seconds 1212 */ 1213 static double 1214 diffsec(struct timeval *timenow, 1215 struct timeval *then) 1216 { 1217 return ((timenow->tv_sec - then->tv_sec)*1.0 1218 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1219 } 1220 1221 1222 static void 1223 timevaladd(struct timeval *t1, 1224 struct timeval *t2) 1225 { 1226 1227 t1->tv_sec += t2->tv_sec; 1228 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1229 t1->tv_sec++; 1230 t1->tv_usec -= 1000000; 1231 } 1232 } 1233 1234 1235 static void 1236 sec_to_timeval(const double sec, struct timeval *tp) 1237 { 1238 tp->tv_sec = sec; 1239 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1240 } 1241 1242 1243 static double 1244 timeval_to_sec(const struct timeval *tp) 1245 { 1246 return tp->tv_sec + tp->tv_usec / 1000000.0; 1247 } 1248 1249 1250 /* 1251 * Print statistics. 1252 * Heavily buffered STDIO is used here, so that all the statistics 1253 * will be written with 1 sys-write call. This is nice when more 1254 * than one copy of the program is running on a terminal; it prevents 1255 * the statistics output from becomming intermingled. 1256 */ 1257 static void 1258 summary(int header) 1259 { 1260 jiggle_flush(1); 1261 1262 if (header) 1263 (void)printf("\n----%s PING Statistics----\n", hostname); 1264 (void)printf("%d packets transmitted, ", ntransmitted); 1265 (void)printf("%d packets received, ", nreceived); 1266 if (nrepeats) 1267 (void)printf("+%d duplicates, ", nrepeats); 1268 if (ntransmitted) { 1269 if (nreceived > ntransmitted) 1270 (void)printf("-- somebody's duplicating packets!"); 1271 else 1272 (void)printf("%.1f%% packet loss", 1273 (((ntransmitted-nreceived)*100.0) / 1274 ntransmitted)); 1275 } 1276 (void)printf("\n"); 1277 if (nreceived && (pingflags & F_TIMING)) { 1278 double n = nreceived + nrepeats; 1279 double avg = (tsum / n); 1280 double variance = 0.0; 1281 if (n>1) 1282 variance = (tsumsq - n*avg*avg) /(n-1); 1283 1284 printf("round-trip min/avg/max/stddev = " 1285 "%.3f/%.3f/%.3f/%.3f ms\n", 1286 tmin * 1000.0, avg * 1000.0, 1287 tmax * 1000.0, sqrt(variance) * 1000.0); 1288 if (pingflags & F_FLOOD) { 1289 double r = diffsec(&last_rx, &first_rx); 1290 double t = diffsec(&last_tx, &first_tx); 1291 if (r == 0) 1292 r = 0.0001; 1293 if (t == 0) 1294 t = 0.0001; 1295 (void)printf(" %.1f packets/sec sent, " 1296 " %.1f packets/sec received\n", 1297 ntransmitted/t, nreceived/r); 1298 } 1299 } 1300 } 1301 1302 1303 /* 1304 * Print statistics when SIGINFO is received. 1305 */ 1306 /* ARGSUSED */ 1307 static void 1308 prtsig(int dummy) 1309 { 1310 summary(0); 1311 #ifdef SIGINFO 1312 (void)signal(SIGINFO, prtsig); 1313 #else 1314 (void)signal(SIGQUIT, prtsig); 1315 #endif 1316 } 1317 1318 1319 /* 1320 * On the first SIGINT, allow any outstanding packets to dribble in 1321 */ 1322 static void 1323 prefinish(int dummy) 1324 { 1325 if (lastrcvd /* quit now if caught up */ 1326 || nreceived == 0) /* or if remote is dead */ 1327 finish(0); 1328 1329 (void)signal(dummy, finish); /* do this only the 1st time */ 1330 1331 if (npackets > ntransmitted) /* let the normal limit work */ 1332 npackets = ntransmitted; 1333 } 1334 1335 1336 /* 1337 * Print statistics and give up. 1338 */ 1339 /* ARGSUSED */ 1340 static void 1341 finish(int dummy) 1342 { 1343 #if defined(SIGINFO) && defined(NOKERNINFO) 1344 struct termios ts; 1345 1346 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1347 ts.c_lflag &= ~NOKERNINFO; 1348 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 1349 } 1350 (void)signal(SIGINFO, SIG_IGN); 1351 #else 1352 (void)signal(SIGQUIT, SIG_DFL); 1353 #endif 1354 1355 summary(1); 1356 exit(nreceived > 0 ? 0 : 2); 1357 } 1358 1359 1360 static int /* 0=do not print it */ 1361 ck_pr_icmph(struct icmp *icp, 1362 struct sockaddr_in *from, 1363 int cc, 1364 int override) /* 1=override VERBOSE if interesting */ 1365 { 1366 int hlen; 1367 struct ip ipb, *ip = &ipb; 1368 struct icmp icp2b, *icp2 = &icp2b; 1369 int res; 1370 1371 if (pingflags & F_VERBOSE) { 1372 res = 1; 1373 jiggle_flush(1); 1374 } else { 1375 res = 0; 1376 } 1377 1378 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1379 hlen = ip->ip_hl << 2; 1380 if (ip->ip_p == IPPROTO_ICMP 1381 && hlen + 6 <= cc) { 1382 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1383 if (icp2->icmp_id == ident) { 1384 /* remember to clear route cached in kernel 1385 * if this non-Echo-Reply ICMP message was for one 1386 * of our packets. 1387 */ 1388 clear_cache.tv_sec = 0; 1389 1390 if (!res && override 1391 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1392 jiggle_flush(1); 1393 (void)printf("%d bytes from %s: ", 1394 cc, pr_addr(&from->sin_addr)); 1395 res = 1; 1396 } 1397 } 1398 } 1399 1400 return res; 1401 } 1402 1403 1404 /* 1405 * Print a descriptive string about an ICMP header other than an echo reply. 1406 */ 1407 static int /* 0=printed nothing */ 1408 pr_icmph(struct icmp *icp, 1409 struct sockaddr_in *from, 1410 int cc) 1411 { 1412 switch (icp->icmp_type ) { 1413 case ICMP_UNREACH: 1414 if (!ck_pr_icmph(icp, from, cc, 1)) 1415 return 0; 1416 switch (icp->icmp_code) { 1417 case ICMP_UNREACH_NET: 1418 (void)printf("Destination Net Unreachable"); 1419 break; 1420 case ICMP_UNREACH_HOST: 1421 (void)printf("Destination Host Unreachable"); 1422 break; 1423 case ICMP_UNREACH_PROTOCOL: 1424 (void)printf("Destination Protocol Unreachable"); 1425 break; 1426 case ICMP_UNREACH_PORT: 1427 (void)printf("Destination Port Unreachable"); 1428 break; 1429 case ICMP_UNREACH_NEEDFRAG: 1430 (void)printf("frag needed and DF set. Next MTU=%d", 1431 ntohs(icp->icmp_nextmtu)); 1432 break; 1433 case ICMP_UNREACH_SRCFAIL: 1434 (void)printf("Source Route Failed"); 1435 break; 1436 case ICMP_UNREACH_NET_UNKNOWN: 1437 (void)printf("Unreachable unknown net"); 1438 break; 1439 case ICMP_UNREACH_HOST_UNKNOWN: 1440 (void)printf("Unreachable unknown host"); 1441 break; 1442 case ICMP_UNREACH_ISOLATED: 1443 (void)printf("Unreachable host isolated"); 1444 break; 1445 case ICMP_UNREACH_NET_PROHIB: 1446 (void)printf("Net prohibited access"); 1447 break; 1448 case ICMP_UNREACH_HOST_PROHIB: 1449 (void)printf("Host prohibited access"); 1450 break; 1451 case ICMP_UNREACH_TOSNET: 1452 (void)printf("Bad TOS for net"); 1453 break; 1454 case ICMP_UNREACH_TOSHOST: 1455 (void)printf("Bad TOS for host"); 1456 break; 1457 case 13: 1458 (void)printf("Communication prohibited"); 1459 break; 1460 case 14: 1461 (void)printf("Host precedence violation"); 1462 break; 1463 case 15: 1464 (void)printf("Precedence cutoff"); 1465 break; 1466 default: 1467 (void)printf("Bad Destination Unreachable Code: %d", 1468 icp->icmp_code); 1469 break; 1470 } 1471 /* Print returned IP header information */ 1472 pr_retip(icp, cc); 1473 break; 1474 1475 case ICMP_SOURCEQUENCH: 1476 if (!ck_pr_icmph(icp, from, cc, 1)) 1477 return 0; 1478 (void)printf("Source Quench"); 1479 pr_retip(icp, cc); 1480 break; 1481 1482 case ICMP_REDIRECT: 1483 if (!ck_pr_icmph(icp, from, cc, 1)) 1484 return 0; 1485 switch (icp->icmp_code) { 1486 case ICMP_REDIRECT_NET: 1487 (void)printf("Redirect Network"); 1488 break; 1489 case ICMP_REDIRECT_HOST: 1490 (void)printf("Redirect Host"); 1491 break; 1492 case ICMP_REDIRECT_TOSNET: 1493 (void)printf("Redirect Type of Service and Network"); 1494 break; 1495 case ICMP_REDIRECT_TOSHOST: 1496 (void)printf("Redirect Type of Service and Host"); 1497 break; 1498 default: 1499 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1500 break; 1501 } 1502 (void)printf(" New router addr: %s", 1503 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1504 pr_retip(icp, cc); 1505 break; 1506 1507 case ICMP_ECHO: 1508 if (!ck_pr_icmph(icp, from, cc, 0)) 1509 return 0; 1510 (void)printf("Echo Request: ID=%d seq=%d", 1511 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1512 break; 1513 1514 case ICMP_ECHOREPLY: 1515 /* displaying other's pings is too noisey */ 1516 #if 0 1517 if (!ck_pr_icmph(icp, from, cc, 0)) 1518 return 0; 1519 (void)printf("Echo Reply: ID=%d seq=%d", 1520 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1521 break; 1522 #else 1523 return 0; 1524 #endif 1525 1526 case ICMP_ROUTERADVERT: 1527 if (!ck_pr_icmph(icp, from, cc, 0)) 1528 return 0; 1529 (void)printf("Router Discovery Advert"); 1530 break; 1531 1532 case ICMP_ROUTERSOLICIT: 1533 if (!ck_pr_icmph(icp, from, cc, 0)) 1534 return 0; 1535 (void)printf("Router Discovery Solicit"); 1536 break; 1537 1538 case ICMP_TIMXCEED: 1539 if (!ck_pr_icmph(icp, from, cc, 1)) 1540 return 0; 1541 switch (icp->icmp_code ) { 1542 case ICMP_TIMXCEED_INTRANS: 1543 (void)printf("Time To Live exceeded"); 1544 break; 1545 case ICMP_TIMXCEED_REASS: 1546 (void)printf("Frag reassembly time exceeded"); 1547 break; 1548 default: 1549 (void)printf("Time exceeded, Bad Code: %d", 1550 icp->icmp_code); 1551 break; 1552 } 1553 pr_retip(icp, cc); 1554 break; 1555 1556 case ICMP_PARAMPROB: 1557 if (!ck_pr_icmph(icp, from, cc, 1)) 1558 return 0; 1559 (void)printf("Parameter problem: pointer = 0x%02x", 1560 icp->icmp_hun.ih_pptr); 1561 pr_retip(icp, cc); 1562 break; 1563 1564 case ICMP_TSTAMP: 1565 if (!ck_pr_icmph(icp, from, cc, 0)) 1566 return 0; 1567 (void)printf("Timestamp"); 1568 break; 1569 1570 case ICMP_TSTAMPREPLY: 1571 if (!ck_pr_icmph(icp, from, cc, 0)) 1572 return 0; 1573 (void)printf("Timestamp Reply"); 1574 break; 1575 1576 case ICMP_IREQ: 1577 if (!ck_pr_icmph(icp, from, cc, 0)) 1578 return 0; 1579 (void)printf("Information Request"); 1580 break; 1581 1582 case ICMP_IREQREPLY: 1583 if (!ck_pr_icmph(icp, from, cc, 0)) 1584 return 0; 1585 (void)printf("Information Reply"); 1586 break; 1587 1588 case ICMP_MASKREQ: 1589 if (!ck_pr_icmph(icp, from, cc, 0)) 1590 return 0; 1591 (void)printf("Address Mask Request"); 1592 break; 1593 1594 case ICMP_MASKREPLY: 1595 if (!ck_pr_icmph(icp, from, cc, 0)) 1596 return 0; 1597 (void)printf("Address Mask Reply"); 1598 break; 1599 1600 default: 1601 if (!ck_pr_icmph(icp, from, cc, 0)) 1602 return 0; 1603 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1604 if (pingflags & F_VERBOSE) 1605 pr_iph(icp, cc); 1606 } 1607 1608 return 1; 1609 } 1610 1611 1612 /* 1613 * Print an IP header with options. 1614 */ 1615 static void 1616 pr_iph(struct icmp *icp, 1617 int cc) 1618 { 1619 int hlen; 1620 u_char *cp; 1621 struct ip ipb, *ip = &ipb; 1622 1623 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1624 1625 hlen = ip->ip_hl << 2; 1626 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1627 1628 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1629 (void)printf(" %1x %1x %02x %04x %04x", 1630 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1631 (void)printf(" %1x %04x", 1632 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1633 (void)printf(" %02x %02x %04x", 1634 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1635 (void)printf(" %15s ", 1636 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1637 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1638 /* dump any option bytes */ 1639 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1640 (void)printf("%02x", *cp++); 1641 } 1642 } 1643 1644 /* 1645 * Print an ASCII host address starting from a string of bytes. 1646 */ 1647 static void 1648 pr_saddr(u_char *cp) 1649 { 1650 n_long l; 1651 struct in_addr addr; 1652 1653 l = (u_char)*++cp; 1654 l = (l<<8) + (u_char)*++cp; 1655 l = (l<<8) + (u_char)*++cp; 1656 l = (l<<8) + (u_char)*++cp; 1657 addr.s_addr = htonl(l); 1658 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1659 } 1660 1661 1662 /* 1663 * Return an ASCII host address 1664 * as a dotted quad and optionally with a hostname 1665 */ 1666 static char * 1667 pr_addr(struct in_addr *addr) /* in network order */ 1668 { 1669 struct hostent *hp; 1670 static char buf[MAXHOSTNAMELEN+4+16+1]; 1671 1672 if ((pingflags & F_NUMERIC) 1673 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1674 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1675 } else { 1676 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1677 inet_ntoa(*addr)); 1678 } 1679 1680 return buf; 1681 } 1682 1683 /* 1684 * Dump some info on a returned (via ICMP) IP packet. 1685 */ 1686 static void 1687 pr_retip(struct icmp *icp, 1688 int cc) 1689 { 1690 int hlen; 1691 u_char *cp; 1692 struct ip ipb, *ip = &ipb; 1693 1694 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1695 1696 if (pingflags & F_VERBOSE) 1697 pr_iph(icp, cc); 1698 1699 hlen = ip->ip_hl << 2; 1700 cp = (u_char *) &icp->icmp_data[hlen]; 1701 1702 if (ip->ip_p == IPPROTO_TCP) { 1703 if (pingflags & F_VERBOSE) 1704 (void)printf("\n TCP: from port %u, to port %u", 1705 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1706 } else if (ip->ip_p == IPPROTO_UDP) { 1707 if (pingflags & F_VERBOSE) 1708 (void)printf("\n UDP: from port %u, to port %u", 1709 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1710 } else if (ip->ip_p == IPPROTO_ICMP) { 1711 struct icmp icp2; 1712 (void) memcpy(&icp2, cp, sizeof(icp2)); 1713 if (icp2.icmp_type == ICMP_ECHO) { 1714 if (pingflags & F_VERBOSE) 1715 (void)printf("\n ID=%u icmp_seq=%u", 1716 ntohs((u_int16_t)icp2.icmp_id), 1717 ntohs((u_int16_t)icp2.icmp_seq)); 1718 else 1719 (void)printf(" for icmp_seq=%u", 1720 ntohs((u_int16_t)icp2.icmp_seq)); 1721 } 1722 } 1723 } 1724 1725 static void 1726 fill(void) 1727 { 1728 int i, j, k; 1729 char *cp; 1730 int pat[16]; 1731 1732 for (cp = fill_pat; *cp != '\0'; cp++) { 1733 if (!isxdigit((unsigned char)*cp)) 1734 break; 1735 } 1736 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1737 (void)fflush(stdout); 1738 errx(1, "\"-p %s\": patterns must be specified with" 1739 " 1-32 hex digits\n", 1740 fill_pat); 1741 } 1742 1743 i = sscanf(fill_pat, 1744 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1745 &pat[0], &pat[1], &pat[2], &pat[3], 1746 &pat[4], &pat[5], &pat[6], &pat[7], 1747 &pat[8], &pat[9], &pat[10], &pat[11], 1748 &pat[12], &pat[13], &pat[14], &pat[15]); 1749 1750 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1751 opack_icmp.icmp_data[k] = pat[j]; 1752 if (++j >= i) 1753 j = 0; 1754 } 1755 1756 if (!(pingflags & F_QUIET)) { 1757 (void)printf("PATTERN: 0x"); 1758 for (j=0; j<i; j++) 1759 (void)printf("%02x", 1760 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1761 (void)printf("\n"); 1762 } 1763 1764 } 1765 1766 1767 static void 1768 rnd_fill(void) 1769 { 1770 static u_int32_t rnd; 1771 int i; 1772 1773 for (i = PHDR_LEN; i < datalen; i++) { 1774 rnd = (3141592621U * rnd + 663896637U); 1775 opack_icmp.icmp_data[i] = rnd>>24; 1776 } 1777 } 1778 1779 1780 static void 1781 gethost(const char *arg, 1782 const char *name, 1783 struct sockaddr_in *sa, 1784 char *realname, 1785 int realname_len) 1786 { 1787 struct hostent *hp; 1788 1789 (void)memset(sa, 0, sizeof(*sa)); 1790 sa->sin_family = AF_INET; 1791 sa->sin_len = sizeof(struct sockaddr_in); 1792 1793 /* If it is an IP address, try to convert it to a name to 1794 * have something nice to display. 1795 */ 1796 if (inet_aton(name, &sa->sin_addr) != 0) { 1797 if (realname) { 1798 if (pingflags & F_NUMERIC) 1799 hp = 0; 1800 else 1801 hp = gethostbyaddr((char *)&sa->sin_addr, 1802 sizeof(sa->sin_addr), 1803 AF_INET); 1804 (void)strlcpy(realname, hp ? hp->h_name : name, 1805 realname_len); 1806 } 1807 return; 1808 } 1809 1810 hp = gethostbyname(name); 1811 if (!hp) 1812 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1813 1814 if (hp->h_addrtype != AF_INET) 1815 errx(1, "%s only supported with IP", arg); 1816 1817 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1818 1819 if (realname) 1820 (void)strlcpy(realname, hp->h_name, realname_len); 1821 } 1822 1823 1824 static void 1825 usage(void) 1826 { 1827 #ifdef IPSEC 1828 #ifdef IPSEC_POLICY_IPSEC 1829 #define IPSECOPT "\n [-E policy] " 1830 #else 1831 #define IPSECOPT "\n [-AE] " 1832 #endif /*IPSEC_POLICY_IPSEC*/ 1833 #else 1834 #define IPSECOPT "" 1835 #endif /*IPSEC*/ 1836 1837 (void)fprintf(stderr, "Usage: \n" 1838 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1839 " [-i interval] [-I addr]\n" 1840 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1841 " [-w maxwait] " IPSECOPT "host\n", 1842 getprogname()); 1843 exit(1); 1844 } 1845
Indexes created Tue Sep 30 20:09:53 GMT 2025