ping.c revision 1.77.2.1
1 /* $NetBSD: ping.c,v 1.77.2.1 2007/08/26 18:53:05 bouyer 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * P I N G . C 37 * 38 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 39 * measure round-trip-delays and packet loss across network paths. 40 * 41 * Author - 42 * Mike Muuss 43 * U. S. Army Ballistic Research Laboratory 44 * December, 1983 45 * Modified at Uc Berkeley 46 * Record Route and verbose headers - Phil Dykstra, BRL, March 1988. 47 * Multicast options (ttl, if, loop) - Steve Deering, Stanford, August 1988. 48 * ttl, duplicate detection - Cliff Frost, UCB, April 1989 49 * Pad pattern - Cliff Frost (from Tom Ferrin, UCSF), April 1989 50 * 51 * Status - 52 * Public Domain. Distribution Unlimited. 53 * 54 * Bugs - 55 * More statistics could always be gathered. 56 * This program has to run SUID to ROOT to access the ICMP socket. 57 */ 58 59 #include <sys/cdefs.h> 60 #ifndef lint 61 __RCSID("$NetBSD: ping.c,v 1.77.2.1 2007/08/26 18:53:05 bouyer Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <sys/time.h> 68 #include <sys/types.h> 69 #include <sys/signal.h> 70 #include <sys/param.h> 71 #include <sys/socket.h> 72 #include <sys/file.h> 73 #include <termios.h> 74 #include <stdlib.h> 75 #include <unistd.h> 76 #include <poll.h> 77 #include <limits.h> 78 #include <math.h> 79 #include <string.h> 80 #include <err.h> 81 #ifdef sgi 82 #include <bstring.h> 83 #include <getopt.h> 84 #include <sys/prctl.h> 85 #ifndef PRE_KUDZU 86 #include <cap_net.h> 87 #else 88 #define cap_socket socket 89 #endif 90 #else 91 #define cap_socket socket 92 #include <err.h> 93 #endif 94 95 #include <netinet/in_systm.h> 96 #include <netinet/in.h> 97 #include <netinet/ip.h> 98 #include <netinet/ip_icmp.h> 99 #include <netinet/ip_var.h> 100 #include <arpa/inet.h> 101 #include <ctype.h> 102 #include <netdb.h> 103 104 #ifdef IPSEC 105 #include <netinet6/ipsec.h> 106 #endif /*IPSEC*/ 107 108 #define FLOOD_INTVL 0.01 /* default flood output interval */ 109 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 110 111 #define F_VERBOSE 0x0001 112 #define F_QUIET 0x0002 /* minimize all output */ 113 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 114 #define F_FLOOD 0x0008 /* flood-ping */ 115 #define F_RECORD_ROUTE 0x0010 /* record route */ 116 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 117 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 118 #define F_PING_RANDOM 0x0080 /* use random data */ 119 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 120 #define F_TIMING 0x0200 /* room for a timestamp */ 121 #define F_DF 0x0400 /* set IP DF bit */ 122 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 123 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 124 #define F_MCAST 0x2000 /* multicast target */ 125 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 126 #define F_AUDIBLE 0x8000 /* audible output */ 127 #ifdef IPSEC 128 #ifdef IPSEC_POLICY_IPSEC 129 #define F_POLICY 0x10000 130 #else 131 #define F_AUTHHDR 0x10000 132 #define F_ENCRYPT 0x20000 133 #endif /*IPSEC_POLICY_IPSEC*/ 134 #endif /*IPSEC*/ 135 136 137 /* MAX_DUP_CHK is the number of bits in received table, the 138 * maximum number of received sequence numbers we can track to check 139 * for duplicates. 140 */ 141 #define MAX_DUP_CHK (8 * 2048) 142 u_char rcvd_tbl[MAX_DUP_CHK/8]; 143 int nrepeats = 0; 144 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 145 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 146 #define SET(seq) (A(seq) |= B(seq)) 147 #define CLR(seq) (A(seq) &= (~B(seq))) 148 #define TST(seq) (A(seq) & B(seq)) 149 150 struct tv32 { 151 int32_t tv32_sec; 152 int32_t tv32_usec; 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 tv32) /* 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 #if defined(SIGINFO) && defined(NOKERNINFO) 245 static int fgtty(int, struct termios *); 246 #endif 247 248 int 249 main(int argc, char *argv[]) 250 { 251 int c, i, on = 1, hostind = 0; 252 long l; 253 u_char ttl = 0; 254 u_long tos = 0; 255 char *p; 256 #ifdef SIGINFO 257 struct termios ts; 258 #endif 259 #ifdef IPSEC 260 #ifdef IPSEC_POLICY_IPSEC 261 char *policy_in = NULL; 262 char *policy_out = NULL; 263 #endif 264 #endif 265 266 267 setprogname(argv[0]); 268 269 #ifndef IPSEC 270 #define IPSECOPT 271 #else 272 #ifdef IPSEC_POLICY_IPSEC 273 #define IPSECOPT "E:" 274 #else 275 #define IPSECOPT "AE" 276 #endif /*IPSEC_POLICY_IPSEC*/ 277 #endif 278 while ((c = getopt(argc, argv, 279 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 280 #undef IPSECOPT 281 switch (c) { 282 case 'a': 283 pingflags |= F_AUDIBLE; 284 break; 285 case 'c': 286 npackets = strtol(optarg, &p, 0); 287 if (*p != '\0' || npackets <= 0) 288 errx(1, "Bad/invalid number of packets"); 289 break; 290 case 'D': 291 pingflags |= F_DF; 292 break; 293 case 'd': 294 options |= SO_DEBUG; 295 break; 296 case 'f': 297 pingflags |= F_FLOOD; 298 break; 299 case 'h': 300 hostind = optind-1; 301 break; 302 case 'i': /* wait between sending packets */ 303 interval = strtod(optarg, &p); 304 if (*p != '\0' || interval <= 0) 305 errx(1, "Bad/invalid interval %s", optarg); 306 break; 307 case 'l': 308 preload = strtol(optarg, &p, 0); 309 if (*p != '\0' || preload < 0) 310 errx(1, "Bad/invalid preload value %s", 311 optarg); 312 break; 313 case 'n': 314 pingflags |= F_NUMERIC; 315 break; 316 case 'o': 317 pingflags |= F_ONCE; 318 break; 319 case 'p': /* fill buffer with user pattern */ 320 if (pingflags & F_PING_RANDOM) 321 errx(1, "Only one of -P and -p allowed"); 322 pingflags |= F_PING_FILLED; 323 fill_pat = optarg; 324 break; 325 case 'P': 326 if (pingflags & F_PING_FILLED) 327 errx(1, "Only one of -P and -p allowed"); 328 pingflags |= F_PING_RANDOM; 329 break; 330 case 'q': 331 pingflags |= F_QUIET; 332 break; 333 case 'Q': 334 pingflags |= F_SEMI_QUIET; 335 break; 336 case 'r': 337 options |= SO_DONTROUTE; 338 break; 339 case 's': /* size of packet to send */ 340 datalen = strtol(optarg, &p, 0); 341 if (*p != '\0' || datalen < 0) 342 errx(1, "Bad/invalid packet size %s", optarg); 343 if (datalen > MAXPACKET) 344 errx(1, "packet size is too large"); 345 break; 346 case 'v': 347 pingflags |= F_VERBOSE; 348 break; 349 case 'R': 350 pingflags |= F_RECORD_ROUTE; 351 break; 352 case 'L': 353 pingflags |= F_MCAST_NOLOOP; 354 break; 355 case 't': 356 tos = strtoul(optarg, &p, 0); 357 if (*p != '\0' || tos > 0xFF) 358 errx(1, "bad tos value: %s", optarg); 359 break; 360 case 'T': 361 l = strtol(optarg, &p, 0); 362 if (*p != '\0' || l > 255 || l <= 0) 363 errx(1, "ttl out of range"); 364 ttl = (u_char)l; /* cannot check >255 otherwise */ 365 break; 366 case 'I': 367 pingflags |= F_SOURCE_ADDR; 368 gethost("-I", optarg, &src_addr, 0, 0); 369 break; 370 case 'g': 371 pingflags |= F_SOURCE_ROUTE; 372 gethost("-g", optarg, &send_addr, 0, 0); 373 break; 374 case 'w': 375 maxwait = strtod(optarg, &p); 376 if (*p != '\0' || maxwait <= 0) 377 errx(1, "Bad/invalid maxwait time %s", optarg); 378 break; 379 #ifdef IPSEC 380 #ifdef IPSEC_POLICY_IPSEC 381 case 'E': 382 pingflags |= F_POLICY; 383 if (!strncmp("in", optarg, 2)) { 384 policy_in = strdup(optarg); 385 if (!policy_in) 386 err(1, "strdup"); 387 } else if (!strncmp("out", optarg, 3)) { 388 policy_out = strdup(optarg); 389 if (!policy_out) 390 err(1, "strdup"); 391 } else 392 errx(1, "invalid security policy"); 393 break; 394 #else 395 case 'A': 396 pingflags |= F_AUTHHDR; 397 break; 398 case 'E': 399 pingflags |= F_ENCRYPT; 400 break; 401 #endif /*IPSEC_POLICY_IPSEC*/ 402 #endif /*IPSEC*/ 403 default: 404 usage(); 405 break; 406 } 407 } 408 409 if (interval == 0) 410 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 411 #ifndef sgi 412 if (pingflags & F_FLOOD && getuid()) 413 errx(1, "Must be superuser to use -f"); 414 if (interval < 1.0 && getuid()) 415 errx(1, "Must be superuser to use < 1 sec ping interval"); 416 if (preload > 0 && getuid()) 417 errx(1, "Must be superuser to use -l"); 418 #endif 419 sec_to_timeval(interval, &interval_tv); 420 421 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 422 warnx("Sorry, no audible output for flood pings"); 423 424 if (npackets != 0) { 425 npackets += preload; 426 } else { 427 npackets = INT_MAX; 428 } 429 430 if (hostind == 0) { 431 if (optind != argc-1) 432 usage(); 433 else 434 hostind = optind; 435 } 436 else if (hostind >= argc - 1) 437 usage(); 438 439 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 440 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 441 pingflags |= F_MCAST; 442 if (!(pingflags & F_SOURCE_ROUTE)) 443 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 444 445 loc_addr.sin_family = AF_INET; 446 loc_addr.sin_len = sizeof(struct sockaddr_in); 447 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 448 449 if (datalen >= PHDR_LEN) /* can we time them? */ 450 pingflags |= F_TIMING; 451 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 452 if ((packet = (u_char *)malloc(packlen)) == NULL) 453 err(1, "Out of memory"); 454 455 if (pingflags & F_PING_FILLED) { 456 fill(); 457 } else if (pingflags & F_PING_RANDOM) { 458 rnd_fill(); 459 } else { 460 for (i = PHDR_LEN; i < datalen; i++) 461 opack_icmp.icmp_data[i] = i; 462 } 463 464 ident = arc4random() & 0xFFFF; 465 466 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 467 err(1, "Cannot create socket"); 468 if (options & SO_DEBUG) { 469 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 470 (char *)&on, sizeof(on)) == -1) 471 warn("Can't turn on socket debugging"); 472 } 473 if (options & SO_DONTROUTE) { 474 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 475 (char *)&on, sizeof(on)) == -1) 476 warn("SO_DONTROUTE"); 477 } 478 479 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 480 err(1, "Cannot create socket"); 481 if (options & SO_DEBUG) { 482 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 483 (char *)&on, sizeof(on)) == -1) 484 warn("Can't turn on socket debugging"); 485 } 486 if (options & SO_DONTROUTE) { 487 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 488 (char *)&on, sizeof(on)) == -1) 489 warn("SO_DONTROUTE"); 490 } 491 492 if (pingflags & F_SOURCE_ROUTE) { 493 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 494 optspace[IPOPT_OLEN] = optlen = 7; 495 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 496 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 497 sizeof(whereto.sin_addr)); 498 optspace[optlen++] = IPOPT_NOP; 499 } 500 if (pingflags & F_RECORD_ROUTE) { 501 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 502 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 503 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 504 optlen = MAX_IPOPTLEN; 505 } 506 /* this leaves opack_ip 0(mod 4) aligned */ 507 opack_ip = (struct ip *)((char *)&out_pack.o_ip 508 + sizeof(out_pack.o_opt) 509 - optlen); 510 (void) memcpy(opack_ip + 1, optspace, optlen); 511 512 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 513 err(1, "Can't set special IP header"); 514 515 opack_ip->ip_v = IPVERSION; 516 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 517 opack_ip->ip_tos = tos; 518 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 519 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 520 opack_ip->ip_p = IPPROTO_ICMP; 521 opack_ip->ip_src = src_addr.sin_addr; 522 opack_ip->ip_dst = send_addr.sin_addr; 523 524 if (pingflags & F_MCAST) { 525 if (pingflags & F_MCAST_NOLOOP) { 526 u_char loop = 0; 527 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 528 (char *) &loop, 1) < 0) 529 err(1, "Can't disable multicast loopback"); 530 } 531 532 if (ttl != 0 533 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 534 (char *) &ttl, 1) < 0) 535 err(1, "Can't set multicast time-to-live"); 536 537 if ((pingflags & F_SOURCE_ADDR) 538 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 539 (char *) &src_addr.sin_addr, 540 sizeof(src_addr.sin_addr)) < 0) 541 err(1, "Can't set multicast source interface"); 542 543 } else if (pingflags & F_SOURCE_ADDR) { 544 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 545 (char *) &src_addr.sin_addr, 546 sizeof(src_addr.sin_addr)) < 0) 547 err(1, "Can't set source interface/address"); 548 } 549 #ifdef IPSEC 550 #ifdef IPSEC_POLICY_IPSEC 551 { 552 char *buf; 553 if (pingflags & F_POLICY) { 554 if (policy_in != NULL) { 555 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 556 if (buf == NULL) 557 errx(1, "%s", ipsec_strerror()); 558 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 559 buf, ipsec_get_policylen(buf)) < 0) { 560 err(1, "ipsec policy cannot be configured"); 561 } 562 free(buf); 563 } 564 if (policy_out != NULL) { 565 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 566 if (buf == NULL) 567 errx(1, "%s", ipsec_strerror()); 568 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 569 buf, ipsec_get_policylen(buf)) < 0) { 570 err(1, "ipsec policy cannot be configured"); 571 } 572 free(buf); 573 } 574 } 575 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 576 if (buf == NULL) 577 errx(1, "%s", ipsec_strerror()); 578 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 579 buf, ipsec_get_policylen(buf)) < 0) { 580 #if 0 581 warnx("ipsec is not configured"); 582 #else 583 /* ignore it, should be okay */ 584 #endif 585 } 586 free(buf); 587 } 588 #else 589 { 590 int optval; 591 if (pingflags & F_AUTHHDR) { 592 optval = IPSEC_LEVEL_REQUIRE; 593 #ifdef IP_AUTH_TRANS_LEVEL 594 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 595 (char *)&optval, sizeof(optval)); 596 #else 597 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 598 (char *)&optval, sizeof(optval)); 599 #endif 600 } 601 if (pingflags & F_ENCRYPT) { 602 optval = IPSEC_LEVEL_REQUIRE; 603 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 604 (char *)&optval, sizeof(optval)); 605 } 606 optval = IPSEC_LEVEL_BYPASS; 607 #ifdef IP_AUTH_TRANS_LEVEL 608 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 609 (char *)&optval, sizeof(optval)); 610 #else 611 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 612 (char *)&optval, sizeof(optval)); 613 #endif 614 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 615 (char *)&optval, sizeof(optval)); 616 } 617 #endif /*IPSEC_POLICY_IPSEC*/ 618 #endif /*IPSEC*/ 619 620 (void)printf("PING %s (%s): %d data bytes\n", hostname, 621 inet_ntoa(whereto.sin_addr), datalen); 622 623 /* When pinging the broadcast address, you can get a lot 624 * of answers. Doing something so evil is useful if you 625 * are trying to stress the ethernet, or just want to 626 * fill the arp cache to get some stuff for /etc/ethers. 627 */ 628 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 629 (char*)&bufspace, sizeof(bufspace))) { 630 if ((bufspace -= 4096) <= 0) 631 err(1, "Cannot set the receive buffer size"); 632 } 633 634 /* make it possible to send giant probes, but do not worry now 635 * if it fails, since we probably won't send giant probes. 636 */ 637 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 638 (char*)&bufspace, sizeof(bufspace)); 639 640 (void)signal(SIGINT, prefinish); 641 642 #if defined(SIGINFO) && defined(NOKERNINFO) 643 if (fgtty(STDIN_FILENO, &ts) != -1) { 644 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 645 ts.c_lflag |= NOKERNINFO; 646 (void)tcsetattr(STDIN_FILENO, TCSANOW, &ts); 647 } 648 #endif 649 650 #ifdef SIGINFO 651 (void)signal(SIGINFO, prtsig); 652 #else 653 (void)signal(SIGQUIT, prtsig); 654 #endif 655 (void)signal(SIGCONT, prtsig); 656 657 /* fire off them quickies */ 658 for (i = 0; i < preload; i++) { 659 (void)gettimeofday(&now, 0); 660 pinger(); 661 } 662 663 doit(); 664 return 0; 665 } 666 667 668 static void 669 doit(void) 670 { 671 int cc; 672 struct sockaddr_in from; 673 int fromlen; 674 double sec, last, d_last; 675 struct pollfd fdmaskp[1]; 676 677 (void)gettimeofday(&clear_cache,0); 678 if (maxwait != 0) { 679 last = timeval_to_sec(&clear_cache) + maxwait; 680 d_last = 0; 681 } else { 682 last = 0; 683 d_last = 365*24*60*60; 684 } 685 686 do { 687 (void)gettimeofday(&now,0); 688 689 if (last != 0) 690 d_last = last - timeval_to_sec(&now); 691 692 if (ntransmitted < npackets && d_last > 0) { 693 /* send if within 100 usec or late for next packet */ 694 sec = diffsec(&next_tx,&now); 695 if (sec <= 0.0001 || 696 (lastrcvd && (pingflags & F_FLOOD))) { 697 pinger(); 698 sec = diffsec(&next_tx,&now); 699 } 700 if (sec < 0.0) 701 sec = 0.0; 702 if (d_last < sec) 703 sec = d_last; 704 705 } else { 706 /* For the last response, wait twice as long as the 707 * worst case seen, or 10 times as long as the 708 * maximum interpacket interval, whichever is longer. 709 */ 710 sec = MAX(2 * tmax, 10 * interval) - 711 diffsec(&now, &last_tx); 712 if (d_last < sec) 713 sec = d_last; 714 if (sec <= 0) 715 break; 716 } 717 718 719 fdmaskp[0].fd = s; 720 fdmaskp[0].events = POLLIN; 721 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 722 if (cc <= 0) { 723 if (cc < 0) { 724 if (errno == EINTR) 725 continue; 726 jiggle_flush(1); 727 err(1, "poll"); 728 } 729 continue; 730 } 731 732 fromlen = sizeof(from); 733 cc = recvfrom(s, (char *) packet, packlen, 734 0, (struct sockaddr *)&from, 735 &fromlen); 736 if (cc < 0) { 737 if (errno != EINTR) { 738 jiggle_flush(1); 739 warn("recvfrom"); 740 (void)fflush(stderr); 741 } 742 continue; 743 } 744 (void)gettimeofday(&now, 0); 745 pr_pack(packet, cc, &from); 746 747 } while (nreceived < npackets 748 && (nreceived == 0 || !(pingflags & F_ONCE))); 749 750 finish(0); 751 } 752 753 754 static void 755 jiggle_flush(int nl) /* new line if there are dots */ 756 { 757 int serrno = errno; 758 759 if (jiggle_cnt > 0) { 760 total_jiggled += jiggle_cnt; 761 jiggle_direction = 1; 762 do { 763 (void)putchar('.'); 764 } while (--jiggle_cnt > 0); 765 766 } else if (jiggle_cnt < 0) { 767 total_jiggled -= jiggle_cnt; 768 jiggle_direction = -1; 769 do { 770 (void)putchar('\b'); 771 } while (++jiggle_cnt < 0); 772 } 773 774 if (nl) { 775 if (total_jiggled != 0) 776 (void)putchar('\n'); 777 total_jiggled = 0; 778 jiggle_direction = -1; 779 } 780 781 (void)fflush(stdout); 782 (void)fflush(stderr); 783 jiggle_time = now; 784 errno = serrno; 785 } 786 787 788 /* jiggle the cursor for flood-ping 789 */ 790 static void 791 jiggle(int delta) 792 { 793 double dt; 794 795 if (pingflags & F_QUIET) 796 return; 797 798 /* do not back up into messages */ 799 if (total_jiggled+jiggle_cnt+delta < 0) 800 return; 801 802 jiggle_cnt += delta; 803 804 /* flush the FLOOD dots when things are quiet 805 * or occassionally to make the cursor jiggle. 806 */ 807 dt = diffsec(&last_tx, &jiggle_time); 808 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 809 jiggle_flush(0); 810 } 811 812 813 /* 814 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 815 * will be added on by the kernel. The ID field is our UNIX process ID, 816 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 817 * of the data portion are used to hold a UNIX "timeval" struct in VAX 818 * byte-order, to compute the round-trip time. 819 */ 820 static void 821 pinger(void) 822 { 823 struct tv32 tv32; 824 int i, cc, sw; 825 826 opack_icmp.icmp_code = 0; 827 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 828 829 /* clear the cached route in the kernel after an ICMP 830 * response such as a Redirect is seen to stop causing 831 * more such packets. Also clear the cached route 832 * periodically in case of routing changes that make 833 * black holes come and go. 834 */ 835 if (clear_cache.tv_sec != now.tv_sec) { 836 opack_icmp.icmp_type = ICMP_ECHOREPLY; 837 opack_icmp.icmp_id = ~ident; 838 opack_icmp.icmp_cksum = 0; 839 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 840 PHDR_LEN); 841 sw = 0; 842 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 843 (char *)&sw,sizeof(sw)) < 0) 844 err(1, "Can't turn off special IP header"); 845 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 846 (struct sockaddr *)&loc_addr, 847 sizeof(struct sockaddr_in)) < 0) { 848 /* 849 * XXX: we only report this as a warning in verbose 850 * mode because people get confused when they see 851 * this error when they are running in single user 852 * mode and they have not configured lo0 853 */ 854 if (pingflags & F_VERBOSE) 855 warn("failed to clear cached route"); 856 } 857 sw = 1; 858 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 859 (char *)&sw, sizeof(sw)) < 0) 860 err(1, "Can't set special IP header"); 861 862 (void)gettimeofday(&clear_cache,0); 863 } 864 865 opack_icmp.icmp_type = ICMP_ECHO; 866 opack_icmp.icmp_id = ident; 867 tv32.tv32_sec = htonl(now.tv_sec); 868 tv32.tv32_usec = htonl(now.tv_usec); 869 if (pingflags & F_TIMING) 870 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 871 cc = datalen + PHDR_LEN; 872 opack_icmp.icmp_cksum = 0; 873 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 874 875 cc += opack_ip->ip_hl<<2; 876 opack_ip->ip_len = cc; 877 i = sendto(s, (char *) opack_ip, cc, 0, 878 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 879 if (i != cc) { 880 jiggle_flush(1); 881 if (i < 0) 882 warn("sendto"); 883 else 884 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 885 (void)fflush(stderr); 886 } 887 lastrcvd = 0; 888 889 CLR(ntransmitted); 890 ntransmitted++; 891 892 last_tx = now; 893 if (next_tx.tv_sec == 0) { 894 first_tx = now; 895 next_tx = now; 896 } 897 898 /* Transmit regularly, at always the same microsecond in the 899 * second when going at one packet per second. 900 * If we are at most 100 ms behind, send extras to get caught up. 901 * Otherwise, skip packets we were too slow to send. 902 */ 903 if (diffsec(&next_tx, &now) <= interval) { 904 do { 905 timevaladd(&next_tx, &interval_tv); 906 } while (diffsec(&next_tx, &now) < -0.1); 907 } 908 909 if (pingflags & F_FLOOD) 910 jiggle(1); 911 912 /* While the packet is going out, ready buffer for the next 913 * packet. Use a fast but not very good random number generator. 914 */ 915 if (pingflags & F_PING_RANDOM) 916 rnd_fill(); 917 } 918 919 920 static void 921 pr_pack_sub(int cc, 922 char *addr, 923 int seqno, 924 int dupflag, 925 int ttl, 926 double triptime) 927 { 928 jiggle_flush(1); 929 930 if (pingflags & F_FLOOD) 931 return; 932 933 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 934 if (dupflag) 935 (void)printf(" DUP!"); 936 (void)printf(" ttl=%d", ttl); 937 if (pingflags & F_TIMING) 938 (void)printf(" time=%.3f ms", triptime*1000.0); 939 940 /* 941 * Send beep to stderr, since that's more likely than stdout 942 * to go to a terminal.. 943 */ 944 if (pingflags & F_AUDIBLE && !dupflag) 945 (void)fprintf(stderr,"\a"); 946 } 947 948 949 /* 950 * Print out the packet, if it came from us. This logic is necessary 951 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 952 * which arrive ('tis only fair). This permits multiple copies of this 953 * program to be run without having intermingled output (or statistics!). 954 */ 955 static void 956 pr_pack(u_char *buf, 957 int tot_len, 958 struct sockaddr_in *from) 959 { 960 struct ip *ip; 961 struct icmp *icp; 962 int i, j, net_len; 963 u_char *cp; 964 static int old_rrlen; 965 static char old_rr[MAX_IPOPTLEN]; 966 int hlen, dupflag = 0, dumped; 967 double triptime = 0.0; 968 #define PR_PACK_SUB() {if (!dumped) { \ 969 dumped = 1; \ 970 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 971 ntohs((u_int16_t)icp->icmp_seq), \ 972 dupflag, ip->ip_ttl, triptime);}} 973 974 /* Check the IP header */ 975 ip = (struct ip *) buf; 976 hlen = ip->ip_hl << 2; 977 if (tot_len < hlen + ICMP_MINLEN) { 978 if (pingflags & F_VERBOSE) { 979 jiggle_flush(1); 980 (void)printf("packet too short (%d bytes) from %s\n", 981 tot_len, inet_ntoa(from->sin_addr)); 982 } 983 return; 984 } 985 986 /* Now the ICMP part */ 987 dumped = 0; 988 net_len = tot_len - hlen; 989 icp = (struct icmp *)(buf + hlen); 990 if (icp->icmp_type == ICMP_ECHOREPLY 991 && icp->icmp_id == ident) { 992 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 993 lastrcvd = 1; 994 last_rx = now; 995 if (first_rx.tv_sec == 0) 996 first_rx = last_rx; 997 nreceived++; 998 if (pingflags & F_TIMING) { 999 struct timeval tv; 1000 struct tv32 tv32; 1001 1002 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1003 tv.tv_sec = ntohl(tv32.tv32_sec); 1004 tv.tv_usec = ntohl(tv32.tv32_usec); 1005 triptime = diffsec(&last_rx, &tv); 1006 tsum += triptime; 1007 tsumsq += triptime * triptime; 1008 if (triptime < tmin) 1009 tmin = triptime; 1010 if (triptime > tmax) 1011 tmax = triptime; 1012 } 1013 1014 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1015 nrepeats++, nreceived--; 1016 dupflag=1; 1017 } else { 1018 SET(ntohs((u_int16_t)icp->icmp_seq)); 1019 } 1020 1021 if (tot_len != opack_ip->ip_len) { 1022 PR_PACK_SUB(); 1023 (void)printf("\nwrong total length %d instead of %d", 1024 tot_len, opack_ip->ip_len); 1025 } 1026 1027 if (!dupflag) { 1028 static u_int16_t last_seqno = 0xffff; 1029 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1030 u_int16_t gap = seqno - (last_seqno + 1); 1031 if (gap > 0 && gap < 0x8000 && 1032 (pingflags & F_VERBOSE)) { 1033 (void)printf("[*** sequence gap of %u " 1034 "packets from %u ... %u ***]\n", gap, 1035 (u_int16_t) (last_seqno + 1), 1036 (u_int16_t) (seqno - 1)); 1037 if (pingflags & F_QUIET) 1038 summary(0); 1039 } 1040 1041 if (gap < 0x8000) 1042 last_seqno = seqno; 1043 } 1044 1045 if (pingflags & F_QUIET) 1046 return; 1047 1048 if (!(pingflags & F_FLOOD)) 1049 PR_PACK_SUB(); 1050 1051 /* check the data */ 1052 if (datalen > PHDR_LEN 1053 && !(pingflags & F_PING_RANDOM) 1054 && memcmp(&icp->icmp_data[PHDR_LEN], 1055 &opack_icmp.icmp_data[PHDR_LEN], 1056 datalen-PHDR_LEN)) { 1057 for (i=PHDR_LEN; i<datalen; i++) { 1058 if (icp->icmp_data[i] != 1059 opack_icmp.icmp_data[i]) 1060 break; 1061 } 1062 PR_PACK_SUB(); 1063 (void)printf("\nwrong data byte #%d should have been" 1064 " %#x but was %#x", i, 1065 (u_char)opack_icmp.icmp_data[i], 1066 (u_char)icp->icmp_data[i]); 1067 for (i=PHDR_LEN; i<datalen; i++) { 1068 if ((i%16) == PHDR_LEN) 1069 (void)printf("\n\t"); 1070 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1071 } 1072 } 1073 1074 } else { 1075 if (!pr_icmph(icp, from, net_len)) 1076 return; 1077 dumped = 2; 1078 } 1079 1080 /* Display any IP options */ 1081 cp = buf + sizeof(struct ip); 1082 while (hlen > (int)sizeof(struct ip)) { 1083 switch (*cp) { 1084 case IPOPT_EOL: 1085 hlen = 0; 1086 break; 1087 case IPOPT_LSRR: 1088 hlen -= 2; 1089 j = *++cp; 1090 ++cp; 1091 j -= IPOPT_MINOFF; 1092 if (j <= 0) 1093 continue; 1094 if (dumped <= 1) { 1095 j = ((j+3)/4)*4; 1096 hlen -= j; 1097 cp += j; 1098 break; 1099 } 1100 PR_PACK_SUB(); 1101 (void)printf("\nLSRR: "); 1102 for (;;) { 1103 pr_saddr(cp); 1104 cp += 4; 1105 hlen -= 4; 1106 j -= 4; 1107 if (j <= 0) 1108 break; 1109 (void)putchar('\n'); 1110 } 1111 break; 1112 case IPOPT_RR: 1113 j = *++cp; /* get length */ 1114 i = *++cp; /* and pointer */ 1115 hlen -= 2; 1116 if (i > j) 1117 i = j; 1118 i -= IPOPT_MINOFF; 1119 if (i <= 0) 1120 continue; 1121 if (dumped <= 1) { 1122 if (i == old_rrlen 1123 && !memcmp(cp, old_rr, i)) { 1124 if (dumped) 1125 (void)printf("\t(same route)"); 1126 j = ((i+3)/4)*4; 1127 hlen -= j; 1128 cp += j; 1129 break; 1130 } 1131 old_rrlen = i; 1132 (void) memcpy(old_rr, cp, i); 1133 } 1134 if (!dumped) { 1135 jiggle_flush(1); 1136 (void)printf("RR: "); 1137 dumped = 1; 1138 } else { 1139 (void)printf("\nRR: "); 1140 } 1141 for (;;) { 1142 pr_saddr(cp); 1143 cp += 4; 1144 hlen -= 4; 1145 i -= 4; 1146 if (i <= 0) 1147 break; 1148 (void)putchar('\n'); 1149 } 1150 break; 1151 case IPOPT_NOP: 1152 if (dumped <= 1) 1153 break; 1154 PR_PACK_SUB(); 1155 (void)printf("\nNOP"); 1156 break; 1157 #ifdef sgi 1158 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1159 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1160 case IPOPT_CIPSO: /* Commercial IPSO */ 1161 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1162 i = (unsigned)cp[1]; 1163 hlen -= i - 1; 1164 PR_PACK_SUB(); 1165 (void)printf("\nSEC:"); 1166 while (i--) { 1167 (void)printf(" %02x", *cp++); 1168 } 1169 cp--; 1170 break; 1171 } 1172 #endif 1173 default: 1174 PR_PACK_SUB(); 1175 (void)printf("\nunknown option 0x%x", *cp); 1176 break; 1177 } 1178 hlen--; 1179 cp++; 1180 } 1181 1182 if (dumped) { 1183 (void)putchar('\n'); 1184 (void)fflush(stdout); 1185 } else { 1186 jiggle(-1); 1187 } 1188 } 1189 1190 1191 /* Compute the IP checksum 1192 * This assumes the packet is less than 32K long. 1193 */ 1194 static u_int16_t 1195 in_cksum(u_int16_t *p, u_int len) 1196 { 1197 u_int32_t sum = 0; 1198 int nwords = len >> 1; 1199 1200 while (nwords-- != 0) 1201 sum += *p++; 1202 1203 if (len & 1) { 1204 union { 1205 u_int16_t w; 1206 u_int8_t c[2]; 1207 } u; 1208 u.c[0] = *(u_char *)p; 1209 u.c[1] = 0; 1210 sum += u.w; 1211 } 1212 1213 /* end-around-carry */ 1214 sum = (sum >> 16) + (sum & 0xffff); 1215 sum += (sum >> 16); 1216 return (~sum); 1217 } 1218 1219 1220 /* 1221 * compute the difference of two timevals in seconds 1222 */ 1223 static double 1224 diffsec(struct timeval *timenow, 1225 struct timeval *then) 1226 { 1227 return ((timenow->tv_sec - then->tv_sec)*1.0 1228 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1229 } 1230 1231 1232 static void 1233 timevaladd(struct timeval *t1, 1234 struct timeval *t2) 1235 { 1236 1237 t1->tv_sec += t2->tv_sec; 1238 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1239 t1->tv_sec++; 1240 t1->tv_usec -= 1000000; 1241 } 1242 } 1243 1244 1245 static void 1246 sec_to_timeval(const double sec, struct timeval *tp) 1247 { 1248 tp->tv_sec = sec; 1249 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1250 } 1251 1252 1253 static double 1254 timeval_to_sec(const struct timeval *tp) 1255 { 1256 return tp->tv_sec + tp->tv_usec / 1000000.0; 1257 } 1258 1259 1260 /* 1261 * Print statistics. 1262 * Heavily buffered STDIO is used here, so that all the statistics 1263 * will be written with 1 sys-write call. This is nice when more 1264 * than one copy of the program is running on a terminal; it prevents 1265 * the statistics output from becomming intermingled. 1266 */ 1267 static void 1268 summary(int header) 1269 { 1270 jiggle_flush(1); 1271 1272 if (header) 1273 (void)printf("\n----%s PING Statistics----\n", hostname); 1274 (void)printf("%d packets transmitted, ", ntransmitted); 1275 (void)printf("%d packets received, ", nreceived); 1276 if (nrepeats) 1277 (void)printf("+%d duplicates, ", nrepeats); 1278 if (ntransmitted) { 1279 if (nreceived > ntransmitted) 1280 (void)printf("-- somebody's duplicating packets!"); 1281 else 1282 (void)printf("%.1f%% packet loss", 1283 (((ntransmitted-nreceived)*100.0) / 1284 ntransmitted)); 1285 } 1286 (void)printf("\n"); 1287 if (nreceived && (pingflags & F_TIMING)) { 1288 double n = nreceived + nrepeats; 1289 double avg = (tsum / n); 1290 double variance = 0.0; 1291 if (n>1) 1292 variance = (tsumsq - n*avg*avg) /(n-1); 1293 1294 printf("round-trip min/avg/max/stddev = " 1295 "%.3f/%.3f/%.3f/%.3f ms\n", 1296 tmin * 1000.0, avg * 1000.0, 1297 tmax * 1000.0, sqrt(variance) * 1000.0); 1298 if (pingflags & F_FLOOD) { 1299 double r = diffsec(&last_rx, &first_rx); 1300 double t = diffsec(&last_tx, &first_tx); 1301 if (r == 0) 1302 r = 0.0001; 1303 if (t == 0) 1304 t = 0.0001; 1305 (void)printf(" %.1f packets/sec sent, " 1306 " %.1f packets/sec received\n", 1307 ntransmitted/t, nreceived/r); 1308 } 1309 } 1310 } 1311 1312 1313 /* 1314 * Print statistics when SIGINFO is received. 1315 */ 1316 /* ARGSUSED */ 1317 static void 1318 prtsig(int dummy) 1319 { 1320 summary(0); 1321 #ifdef SIGINFO 1322 (void)signal(SIGINFO, prtsig); 1323 #else 1324 (void)signal(SIGQUIT, prtsig); 1325 #endif 1326 } 1327 1328 1329 /* 1330 * On the first SIGINT, allow any outstanding packets to dribble in 1331 */ 1332 static void 1333 prefinish(int dummy) 1334 { 1335 if (lastrcvd /* quit now if caught up */ 1336 || nreceived == 0) /* or if remote is dead */ 1337 finish(0); 1338 1339 (void)signal(dummy, finish); /* do this only the 1st time */ 1340 1341 if (npackets > ntransmitted) /* let the normal limit work */ 1342 npackets = ntransmitted; 1343 } 1344 1345 #if defined(SIGINFO) && defined(NOKERNINFO) 1346 static int 1347 fgtty(int fd, struct termios *ts) 1348 { 1349 pid_t ttypgrp, pgrp; 1350 1351 if (tcgetattr(fd, ts) == -1) 1352 return -1; 1353 if ((ttypgrp = tcgetpgrp(fd)) == -1) 1354 return -1; 1355 if ((pgrp = getpgid(0)) == -1) 1356 return -1; 1357 1358 return ttypgrp == pgrp ? 0 : -1; 1359 } 1360 #endif 1361 1362 /* 1363 * Print statistics and give up. 1364 */ 1365 /* ARGSUSED */ 1366 static void 1367 finish(int dummy) 1368 { 1369 #if defined(SIGINFO) && defined(NOKERNINFO) 1370 struct termios ts; 1371 1372 /* 1373 * Note that the following will suspend the ping program 1374 * if it is in the background. We could have used fgtty() 1375 * to avoid this, but then we would fail to restore the 1376 * tty setting. So we prefer to suspend here. XXX: NOKERNINFO 1377 * should prolly be a signal struct attribute 1378 */ 1379 if (reset_kerninfo && tcgetattr(STDIN_FILENO, &ts) != -1) { 1380 ts.c_lflag &= ~NOKERNINFO; 1381 (void)tcsetattr(STDIN_FILENO, TCSANOW, &ts); 1382 } 1383 (void)signal(SIGINFO, SIG_IGN); 1384 #else 1385 (void)signal(SIGQUIT, SIG_DFL); 1386 #endif 1387 1388 summary(1); 1389 exit(nreceived > 0 ? 0 : 2); 1390 } 1391 1392 1393 static int /* 0=do not print it */ 1394 ck_pr_icmph(struct icmp *icp, 1395 struct sockaddr_in *from, 1396 int cc, 1397 int override) /* 1=override VERBOSE if interesting */ 1398 { 1399 int hlen; 1400 struct ip ipb, *ip = &ipb; 1401 struct icmp icp2b, *icp2 = &icp2b; 1402 int res; 1403 1404 if (pingflags & F_VERBOSE) { 1405 res = 1; 1406 jiggle_flush(1); 1407 } else { 1408 res = 0; 1409 } 1410 1411 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1412 hlen = ip->ip_hl << 2; 1413 if (ip->ip_p == IPPROTO_ICMP 1414 && hlen + 6 <= cc) { 1415 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1416 if (icp2->icmp_id == ident) { 1417 /* remember to clear route cached in kernel 1418 * if this non-Echo-Reply ICMP message was for one 1419 * of our packets. 1420 */ 1421 clear_cache.tv_sec = 0; 1422 1423 if (!res && override 1424 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1425 jiggle_flush(1); 1426 (void)printf("%d bytes from %s: ", 1427 cc, pr_addr(&from->sin_addr)); 1428 res = 1; 1429 } 1430 } 1431 } 1432 1433 return res; 1434 } 1435 1436 1437 /* 1438 * Print a descriptive string about an ICMP header other than an echo reply. 1439 */ 1440 static int /* 0=printed nothing */ 1441 pr_icmph(struct icmp *icp, 1442 struct sockaddr_in *from, 1443 int cc) 1444 { 1445 switch (icp->icmp_type ) { 1446 case ICMP_UNREACH: 1447 if (!ck_pr_icmph(icp, from, cc, 1)) 1448 return 0; 1449 switch (icp->icmp_code) { 1450 case ICMP_UNREACH_NET: 1451 (void)printf("Destination Net Unreachable"); 1452 break; 1453 case ICMP_UNREACH_HOST: 1454 (void)printf("Destination Host Unreachable"); 1455 break; 1456 case ICMP_UNREACH_PROTOCOL: 1457 (void)printf("Destination Protocol Unreachable"); 1458 break; 1459 case ICMP_UNREACH_PORT: 1460 (void)printf("Destination Port Unreachable"); 1461 break; 1462 case ICMP_UNREACH_NEEDFRAG: 1463 (void)printf("frag needed and DF set. Next MTU=%d", 1464 ntohs(icp->icmp_nextmtu)); 1465 break; 1466 case ICMP_UNREACH_SRCFAIL: 1467 (void)printf("Source Route Failed"); 1468 break; 1469 case ICMP_UNREACH_NET_UNKNOWN: 1470 (void)printf("Unreachable unknown net"); 1471 break; 1472 case ICMP_UNREACH_HOST_UNKNOWN: 1473 (void)printf("Unreachable unknown host"); 1474 break; 1475 case ICMP_UNREACH_ISOLATED: 1476 (void)printf("Unreachable host isolated"); 1477 break; 1478 case ICMP_UNREACH_NET_PROHIB: 1479 (void)printf("Net prohibited access"); 1480 break; 1481 case ICMP_UNREACH_HOST_PROHIB: 1482 (void)printf("Host prohibited access"); 1483 break; 1484 case ICMP_UNREACH_TOSNET: 1485 (void)printf("Bad TOS for net"); 1486 break; 1487 case ICMP_UNREACH_TOSHOST: 1488 (void)printf("Bad TOS for host"); 1489 break; 1490 case 13: 1491 (void)printf("Communication prohibited"); 1492 break; 1493 case 14: 1494 (void)printf("Host precedence violation"); 1495 break; 1496 case 15: 1497 (void)printf("Precedence cutoff"); 1498 break; 1499 default: 1500 (void)printf("Bad Destination Unreachable Code: %d", 1501 icp->icmp_code); 1502 break; 1503 } 1504 /* Print returned IP header information */ 1505 pr_retip(icp, cc); 1506 break; 1507 1508 case ICMP_SOURCEQUENCH: 1509 if (!ck_pr_icmph(icp, from, cc, 1)) 1510 return 0; 1511 (void)printf("Source Quench"); 1512 pr_retip(icp, cc); 1513 break; 1514 1515 case ICMP_REDIRECT: 1516 if (!ck_pr_icmph(icp, from, cc, 1)) 1517 return 0; 1518 switch (icp->icmp_code) { 1519 case ICMP_REDIRECT_NET: 1520 (void)printf("Redirect Network"); 1521 break; 1522 case ICMP_REDIRECT_HOST: 1523 (void)printf("Redirect Host"); 1524 break; 1525 case ICMP_REDIRECT_TOSNET: 1526 (void)printf("Redirect Type of Service and Network"); 1527 break; 1528 case ICMP_REDIRECT_TOSHOST: 1529 (void)printf("Redirect Type of Service and Host"); 1530 break; 1531 default: 1532 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1533 break; 1534 } 1535 (void)printf(" New router addr: %s", 1536 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1537 pr_retip(icp, cc); 1538 break; 1539 1540 case ICMP_ECHO: 1541 if (!ck_pr_icmph(icp, from, cc, 0)) 1542 return 0; 1543 (void)printf("Echo Request: ID=%d seq=%d", 1544 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1545 break; 1546 1547 case ICMP_ECHOREPLY: 1548 /* displaying other's pings is too noisey */ 1549 #if 0 1550 if (!ck_pr_icmph(icp, from, cc, 0)) 1551 return 0; 1552 (void)printf("Echo Reply: ID=%d seq=%d", 1553 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1554 break; 1555 #else 1556 return 0; 1557 #endif 1558 1559 case ICMP_ROUTERADVERT: 1560 if (!ck_pr_icmph(icp, from, cc, 0)) 1561 return 0; 1562 (void)printf("Router Discovery Advert"); 1563 break; 1564 1565 case ICMP_ROUTERSOLICIT: 1566 if (!ck_pr_icmph(icp, from, cc, 0)) 1567 return 0; 1568 (void)printf("Router Discovery Solicit"); 1569 break; 1570 1571 case ICMP_TIMXCEED: 1572 if (!ck_pr_icmph(icp, from, cc, 1)) 1573 return 0; 1574 switch (icp->icmp_code ) { 1575 case ICMP_TIMXCEED_INTRANS: 1576 (void)printf("Time To Live exceeded"); 1577 break; 1578 case ICMP_TIMXCEED_REASS: 1579 (void)printf("Frag reassembly time exceeded"); 1580 break; 1581 default: 1582 (void)printf("Time exceeded, Bad Code: %d", 1583 icp->icmp_code); 1584 break; 1585 } 1586 pr_retip(icp, cc); 1587 break; 1588 1589 case ICMP_PARAMPROB: 1590 if (!ck_pr_icmph(icp, from, cc, 1)) 1591 return 0; 1592 (void)printf("Parameter problem: pointer = 0x%02x", 1593 icp->icmp_hun.ih_pptr); 1594 pr_retip(icp, cc); 1595 break; 1596 1597 case ICMP_TSTAMP: 1598 if (!ck_pr_icmph(icp, from, cc, 0)) 1599 return 0; 1600 (void)printf("Timestamp"); 1601 break; 1602 1603 case ICMP_TSTAMPREPLY: 1604 if (!ck_pr_icmph(icp, from, cc, 0)) 1605 return 0; 1606 (void)printf("Timestamp Reply"); 1607 break; 1608 1609 case ICMP_IREQ: 1610 if (!ck_pr_icmph(icp, from, cc, 0)) 1611 return 0; 1612 (void)printf("Information Request"); 1613 break; 1614 1615 case ICMP_IREQREPLY: 1616 if (!ck_pr_icmph(icp, from, cc, 0)) 1617 return 0; 1618 (void)printf("Information Reply"); 1619 break; 1620 1621 case ICMP_MASKREQ: 1622 if (!ck_pr_icmph(icp, from, cc, 0)) 1623 return 0; 1624 (void)printf("Address Mask Request"); 1625 break; 1626 1627 case ICMP_MASKREPLY: 1628 if (!ck_pr_icmph(icp, from, cc, 0)) 1629 return 0; 1630 (void)printf("Address Mask Reply"); 1631 break; 1632 1633 default: 1634 if (!ck_pr_icmph(icp, from, cc, 0)) 1635 return 0; 1636 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1637 if (pingflags & F_VERBOSE) 1638 pr_iph(icp, cc); 1639 } 1640 1641 return 1; 1642 } 1643 1644 1645 /* 1646 * Print an IP header with options. 1647 */ 1648 static void 1649 pr_iph(struct icmp *icp, 1650 int cc) 1651 { 1652 int hlen; 1653 u_char *cp; 1654 struct ip ipb, *ip = &ipb; 1655 1656 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1657 1658 hlen = ip->ip_hl << 2; 1659 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1660 1661 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1662 (void)printf(" %1x %1x %02x %04x %04x", 1663 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1664 (void)printf(" %1x %04x", 1665 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1666 (void)printf(" %02x %02x %04x", 1667 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1668 (void)printf(" %15s ", 1669 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1670 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1671 /* dump any option bytes */ 1672 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1673 (void)printf("%02x", *cp++); 1674 } 1675 } 1676 1677 /* 1678 * Print an ASCII host address starting from a string of bytes. 1679 */ 1680 static void 1681 pr_saddr(u_char *cp) 1682 { 1683 n_long l; 1684 struct in_addr addr; 1685 1686 l = (u_char)*++cp; 1687 l = (l<<8) + (u_char)*++cp; 1688 l = (l<<8) + (u_char)*++cp; 1689 l = (l<<8) + (u_char)*++cp; 1690 addr.s_addr = htonl(l); 1691 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1692 } 1693 1694 1695 /* 1696 * Return an ASCII host address 1697 * as a dotted quad and optionally with a hostname 1698 */ 1699 static char * 1700 pr_addr(struct in_addr *addr) /* in network order */ 1701 { 1702 struct hostent *hp; 1703 static char buf[MAXHOSTNAMELEN+4+16+1]; 1704 1705 if ((pingflags & F_NUMERIC) 1706 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1707 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1708 } else { 1709 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1710 inet_ntoa(*addr)); 1711 } 1712 1713 return buf; 1714 } 1715 1716 /* 1717 * Dump some info on a returned (via ICMP) IP packet. 1718 */ 1719 static void 1720 pr_retip(struct icmp *icp, 1721 int cc) 1722 { 1723 int hlen; 1724 u_char *cp; 1725 struct ip ipb, *ip = &ipb; 1726 1727 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1728 1729 if (pingflags & F_VERBOSE) 1730 pr_iph(icp, cc); 1731 1732 hlen = ip->ip_hl << 2; 1733 cp = (u_char *) &icp->icmp_data[hlen]; 1734 1735 if (ip->ip_p == IPPROTO_TCP) { 1736 if (pingflags & F_VERBOSE) 1737 (void)printf("\n TCP: from port %u, to port %u", 1738 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1739 } else if (ip->ip_p == IPPROTO_UDP) { 1740 if (pingflags & F_VERBOSE) 1741 (void)printf("\n UDP: from port %u, to port %u", 1742 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1743 } else if (ip->ip_p == IPPROTO_ICMP) { 1744 struct icmp icp2; 1745 (void) memcpy(&icp2, cp, sizeof(icp2)); 1746 if (icp2.icmp_type == ICMP_ECHO) { 1747 if (pingflags & F_VERBOSE) 1748 (void)printf("\n ID=%u icmp_seq=%u", 1749 ntohs((u_int16_t)icp2.icmp_id), 1750 ntohs((u_int16_t)icp2.icmp_seq)); 1751 else 1752 (void)printf(" for icmp_seq=%u", 1753 ntohs((u_int16_t)icp2.icmp_seq)); 1754 } 1755 } 1756 } 1757 1758 static void 1759 fill(void) 1760 { 1761 int i, j, k; 1762 char *cp; 1763 int pat[16]; 1764 1765 for (cp = fill_pat; *cp != '\0'; cp++) { 1766 if (!isxdigit((unsigned char)*cp)) 1767 break; 1768 } 1769 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1770 (void)fflush(stdout); 1771 errx(1, "\"-p %s\": patterns must be specified with" 1772 " 1-32 hex digits\n", 1773 fill_pat); 1774 } 1775 1776 i = sscanf(fill_pat, 1777 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1778 &pat[0], &pat[1], &pat[2], &pat[3], 1779 &pat[4], &pat[5], &pat[6], &pat[7], 1780 &pat[8], &pat[9], &pat[10], &pat[11], 1781 &pat[12], &pat[13], &pat[14], &pat[15]); 1782 1783 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1784 opack_icmp.icmp_data[k] = pat[j]; 1785 if (++j >= i) 1786 j = 0; 1787 } 1788 1789 if (!(pingflags & F_QUIET)) { 1790 (void)printf("PATTERN: 0x"); 1791 for (j=0; j<i; j++) 1792 (void)printf("%02x", 1793 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1794 (void)printf("\n"); 1795 } 1796 1797 } 1798 1799 1800 static void 1801 rnd_fill(void) 1802 { 1803 static u_int32_t rnd; 1804 int i; 1805 1806 for (i = PHDR_LEN; i < datalen; i++) { 1807 rnd = (3141592621U * rnd + 663896637U); 1808 opack_icmp.icmp_data[i] = rnd>>24; 1809 } 1810 } 1811 1812 1813 static void 1814 gethost(const char *arg, 1815 const char *name, 1816 struct sockaddr_in *sa, 1817 char *realname, 1818 int realname_len) 1819 { 1820 struct hostent *hp; 1821 1822 (void)memset(sa, 0, sizeof(*sa)); 1823 sa->sin_family = AF_INET; 1824 sa->sin_len = sizeof(struct sockaddr_in); 1825 1826 /* If it is an IP address, try to convert it to a name to 1827 * have something nice to display. 1828 */ 1829 if (inet_aton(name, &sa->sin_addr) != 0) { 1830 if (realname) { 1831 if (pingflags & F_NUMERIC) 1832 hp = 0; 1833 else 1834 hp = gethostbyaddr((char *)&sa->sin_addr, 1835 sizeof(sa->sin_addr), 1836 AF_INET); 1837 (void)strlcpy(realname, hp ? hp->h_name : name, 1838 realname_len); 1839 } 1840 return; 1841 } 1842 1843 hp = gethostbyname(name); 1844 if (!hp) 1845 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1846 1847 if (hp->h_addrtype != AF_INET) 1848 errx(1, "%s only supported with IP", arg); 1849 1850 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1851 1852 if (realname) 1853 (void)strlcpy(realname, hp->h_name, realname_len); 1854 } 1855 1856 1857 static void 1858 usage(void) 1859 { 1860 #ifdef IPSEC 1861 #ifdef IPSEC_POLICY_IPSEC 1862 #define IPSECOPT "\n [-E policy] " 1863 #else 1864 #define IPSECOPT "\n [-AE] " 1865 #endif /*IPSEC_POLICY_IPSEC*/ 1866 #else 1867 #define IPSECOPT "" 1868 #endif /*IPSEC*/ 1869 1870 (void)fprintf(stderr, "usage: \n" 1871 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1872 " [-i interval] [-I addr]\n" 1873 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1874 " [-w maxwait] " IPSECOPT "host\n", 1875 getprogname()); 1876 exit(1); 1877 } 1878
Indexes created Wed Oct 22 13:09:56 GMT 2025