ping.c revision 1.70
1 /* $NetBSD: ping.c,v 1.70 2002/11/16 16:02:03 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 1.70 2002/11/16 16:02:03 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_addr.s_addr = htonl((127<<24)+1); 445 446 if (datalen >= PHDR_LEN) /* can we time them? */ 447 pingflags |= F_TIMING; 448 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 449 if ((packet = (u_char *)malloc(packlen)) == NULL) 450 err(1, "Out of memory"); 451 452 if (pingflags & F_PING_FILLED) { 453 fill(); 454 } else if (pingflags & F_PING_RANDOM) { 455 rnd_fill(); 456 } else { 457 for (i = PHDR_LEN; i < datalen; i++) 458 opack_icmp.icmp_data[i] = i; 459 } 460 461 ident = htons(getpid()) & 0xFFFF; 462 463 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 464 err(1, "Cannot create socket"); 465 if (options & SO_DEBUG) { 466 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 467 (char *)&on, sizeof(on)) == -1) 468 warn("Can't turn on socket debugging"); 469 } 470 if (options & SO_DONTROUTE) { 471 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 472 (char *)&on, sizeof(on)) == -1) 473 warn("SO_DONTROUTE"); 474 } 475 476 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 477 err(1, "Cannot create socket"); 478 if (options & SO_DEBUG) { 479 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 480 (char *)&on, sizeof(on)) == -1) 481 warn("Can't turn on socket debugging"); 482 } 483 if (options & SO_DONTROUTE) { 484 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 485 (char *)&on, sizeof(on)) == -1) 486 warn("SO_DONTROUTE"); 487 } 488 489 if (pingflags & F_SOURCE_ROUTE) { 490 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 491 optspace[IPOPT_OLEN] = optlen = 7; 492 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 493 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 494 sizeof(whereto.sin_addr)); 495 optspace[optlen++] = IPOPT_NOP; 496 } 497 if (pingflags & F_RECORD_ROUTE) { 498 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 499 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 500 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 501 optlen = MAX_IPOPTLEN; 502 } 503 /* this leaves opack_ip 0(mod 4) aligned */ 504 opack_ip = (struct ip *)((char *)&out_pack.o_ip 505 + sizeof(out_pack.o_opt) 506 - optlen); 507 (void) memcpy(opack_ip + 1, optspace, optlen); 508 509 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 510 err(1, "Can't set special IP header"); 511 512 opack_ip->ip_v = IPVERSION; 513 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 514 opack_ip->ip_tos = tos; 515 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 516 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 517 opack_ip->ip_p = IPPROTO_ICMP; 518 opack_ip->ip_src = src_addr.sin_addr; 519 opack_ip->ip_dst = send_addr.sin_addr; 520 521 if (pingflags & F_MCAST) { 522 if (pingflags & F_MCAST_NOLOOP) { 523 u_char loop = 0; 524 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 525 (char *) &loop, 1) < 0) 526 err(1, "Can't disable multicast loopback"); 527 } 528 529 if (ttl != 0 530 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 531 (char *) &ttl, 1) < 0) 532 err(1, "Can't set multicast time-to-live"); 533 534 if ((pingflags & F_SOURCE_ADDR) 535 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 536 (char *) &src_addr.sin_addr, 537 sizeof(src_addr.sin_addr)) < 0) 538 err(1, "Can't set multicast source interface"); 539 540 } else if (pingflags & F_SOURCE_ADDR) { 541 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 542 (char *) &src_addr.sin_addr, 543 sizeof(src_addr.sin_addr)) < 0) 544 err(1, "Can't set source interface/address"); 545 } 546 #ifdef IPSEC 547 #ifdef IPSEC_POLICY_IPSEC 548 { 549 char *buf; 550 if (pingflags & F_POLICY) { 551 if (policy_in != NULL) { 552 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 553 if (buf == NULL) 554 errx(1, "%s", ipsec_strerror()); 555 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 556 buf, ipsec_get_policylen(buf)) < 0) { 557 err(1, "ipsec policy cannot be configured"); 558 } 559 free(buf); 560 } 561 if (policy_out != NULL) { 562 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 563 if (buf == NULL) 564 errx(1, "%s", ipsec_strerror()); 565 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 566 buf, ipsec_get_policylen(buf)) < 0) { 567 err(1, "ipsec policy cannot be configured"); 568 } 569 free(buf); 570 } 571 } 572 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 573 if (buf == NULL) 574 errx(1, "%s", ipsec_strerror()); 575 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 576 buf, ipsec_get_policylen(buf)) < 0) { 577 #if 0 578 warnx("ipsec is not configured"); 579 #else 580 /* ignore it, should be okay */ 581 #endif 582 } 583 free(buf); 584 } 585 #else 586 { 587 int optval; 588 if (pingflags & F_AUTHHDR) { 589 optval = IPSEC_LEVEL_REQUIRE; 590 #ifdef IP_AUTH_TRANS_LEVEL 591 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 592 (char *)&optval, sizeof(optval)); 593 #else 594 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 595 (char *)&optval, sizeof(optval)); 596 #endif 597 } 598 if (pingflags & F_ENCRYPT) { 599 optval = IPSEC_LEVEL_REQUIRE; 600 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 601 (char *)&optval, sizeof(optval)); 602 } 603 optval = IPSEC_LEVEL_BYPASS; 604 #ifdef IP_AUTH_TRANS_LEVEL 605 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 606 (char *)&optval, sizeof(optval)); 607 #else 608 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 609 (char *)&optval, sizeof(optval)); 610 #endif 611 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 612 (char *)&optval, sizeof(optval)); 613 } 614 #endif /*IPSEC_POLICY_IPSEC*/ 615 #endif /*IPSEC*/ 616 617 (void)printf("PING %s (%s): %d data bytes\n", hostname, 618 inet_ntoa(whereto.sin_addr), datalen); 619 620 /* When pinging the broadcast address, you can get a lot 621 * of answers. Doing something so evil is useful if you 622 * are trying to stress the ethernet, or just want to 623 * fill the arp cache to get some stuff for /etc/ethers. 624 */ 625 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 626 (char*)&bufspace, sizeof(bufspace))) { 627 if ((bufspace -= 4096) <= 0) 628 err(1, "Cannot set the receive buffer size"); 629 } 630 631 /* make it possible to send giant probes, but do not worry now 632 * if it fails, since we probably won't send giant probes. 633 */ 634 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 635 (char*)&bufspace, sizeof(bufspace)); 636 637 (void)signal(SIGINT, prefinish); 638 639 #if defined(SIGINFO) && defined(NOKERNINFO) 640 if (tcgetattr (0, &ts) != -1) { 641 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 642 ts.c_lflag |= NOKERNINFO; 643 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 644 } 645 #endif 646 647 #ifdef SIGINFO 648 (void)signal(SIGINFO, prtsig); 649 #else 650 (void)signal(SIGQUIT, prtsig); 651 #endif 652 (void)signal(SIGCONT, prtsig); 653 654 /* fire off them quickies */ 655 for (i = 0; i < preload; i++) { 656 (void)gettimeofday(&now, 0); 657 pinger(); 658 } 659 660 doit(); 661 return 0; 662 } 663 664 665 static void 666 doit(void) 667 { 668 int cc; 669 struct sockaddr_in from; 670 int fromlen; 671 double sec, last, d_last; 672 struct pollfd fdmaskp[1]; 673 674 (void)gettimeofday(&clear_cache,0); 675 if (maxwait != 0) { 676 last = timeval_to_sec(&clear_cache) + maxwait; 677 d_last = 0; 678 } else { 679 last = 0; 680 d_last = 365*24*60*60; 681 } 682 683 do { 684 (void)gettimeofday(&now,0); 685 686 if (last != 0) 687 d_last = last - timeval_to_sec(&now); 688 689 if (ntransmitted < npackets && d_last > 0) { 690 /* send if within 100 usec or late for next packet */ 691 sec = diffsec(&next_tx,&now); 692 if (sec <= 0.0001 693 || (lastrcvd && (pingflags & F_FLOOD))) { 694 pinger(); 695 sec = diffsec(&next_tx,&now); 696 } 697 if (sec < 0.0) 698 sec = 0.0; 699 if (d_last < sec) 700 sec = d_last; 701 702 } else { 703 /* For the last response, wait twice as long as the 704 * worst case seen, or 10 times as long as the 705 * maximum interpacket interval, whichever is longer. 706 */ 707 sec = MAX(2*tmax,10*interval) - diffsec(&now,&last_tx); 708 if (d_last < sec) 709 sec = d_last; 710 if (sec <= 0) 711 break; 712 } 713 714 715 fdmaskp[0].fd = s; 716 fdmaskp[0].events = POLLIN; 717 cc = poll(fdmaskp, 1, (int)(sec * 1000)); 718 if (cc <= 0) { 719 if (cc < 0) { 720 if (errno == EINTR) 721 continue; 722 jiggle_flush(1); 723 err(1, "poll"); 724 } 725 continue; 726 } 727 728 fromlen = sizeof(from); 729 cc = recvfrom(s, (char *) packet, packlen, 730 0, (struct sockaddr *)&from, 731 &fromlen); 732 if (cc < 0) { 733 if (errno != EINTR) { 734 jiggle_flush(1); 735 warn("recvfrom"); 736 (void)fflush(stderr); 737 } 738 continue; 739 } 740 (void)gettimeofday(&now, 0); 741 pr_pack(packet, cc, &from); 742 743 } while (nreceived < npackets 744 && (nreceived == 0 || !(pingflags & F_ONCE))); 745 746 finish(0); 747 } 748 749 750 static void 751 jiggle_flush(int nl) /* new line if there are dots */ 752 { 753 int serrno = errno; 754 755 if (jiggle_cnt > 0) { 756 total_jiggled += jiggle_cnt; 757 jiggle_direction = 1; 758 do { 759 (void)putchar('.'); 760 } while (--jiggle_cnt > 0); 761 762 } else if (jiggle_cnt < 0) { 763 total_jiggled -= jiggle_cnt; 764 jiggle_direction = -1; 765 do { 766 (void)putchar('\b'); 767 } while (++jiggle_cnt < 0); 768 } 769 770 if (nl) { 771 if (total_jiggled != 0) 772 (void)putchar('\n'); 773 total_jiggled = 0; 774 jiggle_direction = -1; 775 } 776 777 (void)fflush(stdout); 778 (void)fflush(stderr); 779 jiggle_time = now; 780 errno = serrno; 781 } 782 783 784 /* jiggle the cursor for flood-ping 785 */ 786 static void 787 jiggle(int delta) 788 { 789 double dt; 790 791 if (pingflags & F_QUIET) 792 return; 793 794 /* do not back up into messages */ 795 if (total_jiggled+jiggle_cnt+delta < 0) 796 return; 797 798 jiggle_cnt += delta; 799 800 /* flush the FLOOD dots when things are quiet 801 * or occassionally to make the cursor jiggle. 802 */ 803 dt = diffsec(&last_tx, &jiggle_time); 804 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 805 jiggle_flush(0); 806 } 807 808 809 /* 810 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 811 * will be added on by the kernel. The ID field is our UNIX process ID, 812 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 813 * of the data portion are used to hold a UNIX "timeval" struct in VAX 814 * byte-order, to compute the round-trip time. 815 */ 816 static void 817 pinger(void) 818 { 819 int i, cc, sw; 820 821 opack_icmp.icmp_code = 0; 822 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 823 824 /* clear the cached route in the kernel after an ICMP 825 * response such as a Redirect is seen to stop causing 826 * more such packets. Also clear the cached route 827 * periodically in case of routing changes that make 828 * black holes come and go. 829 */ 830 if (clear_cache.tv_sec != now.tv_sec) { 831 opack_icmp.icmp_type = ICMP_ECHOREPLY; 832 opack_icmp.icmp_id = ~ident; 833 opack_icmp.icmp_cksum = 0; 834 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 835 PHDR_LEN); 836 sw = 0; 837 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 838 (char *)&sw,sizeof(sw)) < 0) 839 err(1, "Can't turn off special IP header"); 840 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 841 (struct sockaddr *)&loc_addr, 842 sizeof(struct sockaddr_in)) < 0) { 843 /* 844 * XXX: we only report this as a warning in verbose 845 * mode because people get confused when they see 846 * this error when they are running in single user 847 * mode and they have not configured lo0 848 */ 849 if (pingflags & F_VERBOSE) 850 warn("failed to clear cached route"); 851 } 852 sw = 1; 853 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 854 (char *)&sw, sizeof(sw)) < 0) 855 err(1, "Can't set special IP header"); 856 857 (void)gettimeofday(&clear_cache,0); 858 } 859 860 opack_icmp.icmp_type = ICMP_ECHO; 861 opack_icmp.icmp_id = ident; 862 if (pingflags & F_TIMING) 863 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 864 cc = datalen+PHDR_LEN; 865 opack_icmp.icmp_cksum = 0; 866 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 867 868 cc += opack_ip->ip_hl<<2; 869 opack_ip->ip_len = cc; 870 i = sendto(s, (char *) opack_ip, cc, 0, 871 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 872 if (i != cc) { 873 jiggle_flush(1); 874 if (i < 0) 875 warn("sendto"); 876 else 877 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 878 (void)fflush(stderr); 879 } 880 lastrcvd = 0; 881 882 CLR(ntransmitted); 883 ntransmitted++; 884 885 last_tx = now; 886 if (next_tx.tv_sec == 0) { 887 first_tx = now; 888 next_tx = now; 889 } 890 891 /* Transmit regularly, at always the same microsecond in the 892 * second when going at one packet per second. 893 * If we are at most 100 ms behind, send extras to get caught up. 894 * Otherwise, skip packets we were too slow to send. 895 */ 896 if (diffsec(&next_tx, &now) <= interval) { 897 do { 898 timevaladd(&next_tx, &interval_tv); 899 } while (diffsec(&next_tx, &now) < -0.1); 900 } 901 902 if (pingflags & F_FLOOD) 903 jiggle(1); 904 905 /* While the packet is going out, ready buffer for the next 906 * packet. Use a fast but not very good random number generator. 907 */ 908 if (pingflags & F_PING_RANDOM) 909 rnd_fill(); 910 } 911 912 913 static void 914 pr_pack_sub(int cc, 915 char *addr, 916 int seqno, 917 int dupflag, 918 int ttl, 919 double triptime) 920 { 921 jiggle_flush(1); 922 923 if (pingflags & F_FLOOD) 924 return; 925 926 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 927 if (dupflag) 928 (void)printf(" DUP!"); 929 (void)printf(" ttl=%d", ttl); 930 if (pingflags & F_TIMING) 931 (void)printf(" time=%.3f ms", triptime*1000.0); 932 933 /* 934 * Send beep to stderr, since that's more likely than stdout 935 * to go to a terminal.. 936 */ 937 if (pingflags & F_AUDIBLE && !dupflag) 938 (void)fprintf(stderr,"\a"); 939 } 940 941 942 /* 943 * Print out the packet, if it came from us. This logic is necessary 944 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 945 * which arrive ('tis only fair). This permits multiple copies of this 946 * program to be run without having intermingled output (or statistics!). 947 */ 948 static void 949 pr_pack(u_char *buf, 950 int tot_len, 951 struct sockaddr_in *from) 952 { 953 struct ip *ip; 954 struct icmp *icp; 955 int i, j, net_len; 956 u_char *cp; 957 static int old_rrlen; 958 static char old_rr[MAX_IPOPTLEN]; 959 int hlen, dupflag = 0, dumped; 960 double triptime = 0.0; 961 #define PR_PACK_SUB() {if (!dumped) { \ 962 dumped = 1; \ 963 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 964 ntohs((u_int16_t)icp->icmp_seq), \ 965 dupflag, ip->ip_ttl, triptime);}} 966 967 /* Check the IP header */ 968 ip = (struct ip *) buf; 969 hlen = ip->ip_hl << 2; 970 if (tot_len < hlen + ICMP_MINLEN) { 971 if (pingflags & F_VERBOSE) { 972 jiggle_flush(1); 973 (void)printf("packet too short (%d bytes) from %s\n", 974 tot_len, inet_ntoa(from->sin_addr)); 975 } 976 return; 977 } 978 979 /* Now the ICMP part */ 980 dumped = 0; 981 net_len = tot_len - hlen; 982 icp = (struct icmp *)(buf + hlen); 983 if (icp->icmp_type == ICMP_ECHOREPLY 984 && icp->icmp_id == ident) { 985 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 986 lastrcvd = 1; 987 last_rx = now; 988 if (first_rx.tv_sec == 0) 989 first_rx = last_rx; 990 nreceived++; 991 if (pingflags & F_TIMING) { 992 struct timeval tv; 993 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 994 triptime = diffsec(&last_rx, &tv); 995 tsum += triptime; 996 tsumsq += triptime * triptime; 997 if (triptime < tmin) 998 tmin = triptime; 999 if (triptime > tmax) 1000 tmax = triptime; 1001 } 1002 1003 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1004 nrepeats++, nreceived--; 1005 dupflag=1; 1006 } else { 1007 SET(ntohs((u_int16_t)icp->icmp_seq)); 1008 } 1009 1010 if (tot_len != opack_ip->ip_len) { 1011 PR_PACK_SUB(); 1012 (void)printf("\nwrong total length %d instead of %d", 1013 tot_len, opack_ip->ip_len); 1014 } 1015 1016 if (!dupflag) { 1017 static u_int16_t last_seqno = 0xffff; 1018 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1019 u_int16_t gap = seqno - (last_seqno + 1); 1020 if (gap > 0 && gap < 0x8000 && 1021 (pingflags & F_VERBOSE)) { 1022 (void)printf("[*** sequence gap of %u " 1023 "packets from %u ... %u ***]\n", gap, 1024 (u_int16_t) (last_seqno + 1), 1025 (u_int16_t) (seqno - 1)); 1026 if (pingflags & F_QUIET) 1027 summary(0); 1028 } 1029 1030 if (gap < 0x8000) 1031 last_seqno = seqno; 1032 } 1033 1034 if (pingflags & F_QUIET) 1035 return; 1036 1037 if (!(pingflags & F_FLOOD)) 1038 PR_PACK_SUB(); 1039 1040 /* check the data */ 1041 if (datalen > PHDR_LEN 1042 && !(pingflags & F_PING_RANDOM) 1043 && memcmp(&icp->icmp_data[PHDR_LEN], 1044 &opack_icmp.icmp_data[PHDR_LEN], 1045 datalen-PHDR_LEN)) { 1046 for (i=PHDR_LEN; i<datalen; i++) { 1047 if (icp->icmp_data[i] != 1048 opack_icmp.icmp_data[i]) 1049 break; 1050 } 1051 PR_PACK_SUB(); 1052 (void)printf("\nwrong data byte #%d should have been" 1053 " %#x but was %#x", i, 1054 (u_char)opack_icmp.icmp_data[i], 1055 (u_char)icp->icmp_data[i]); 1056 for (i=PHDR_LEN; i<datalen; i++) { 1057 if ((i%16) == PHDR_LEN) 1058 (void)printf("\n\t"); 1059 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1060 } 1061 } 1062 1063 } else { 1064 if (!pr_icmph(icp, from, net_len)) 1065 return; 1066 dumped = 2; 1067 } 1068 1069 /* Display any IP options */ 1070 cp = buf + sizeof(struct ip); 1071 while (hlen > (int)sizeof(struct ip)) { 1072 switch (*cp) { 1073 case IPOPT_EOL: 1074 hlen = 0; 1075 break; 1076 case IPOPT_LSRR: 1077 hlen -= 2; 1078 j = *++cp; 1079 ++cp; 1080 j -= IPOPT_MINOFF; 1081 if (j <= 0) 1082 continue; 1083 if (dumped <= 1) { 1084 j = ((j+3)/4)*4; 1085 hlen -= j; 1086 cp += j; 1087 break; 1088 } 1089 PR_PACK_SUB(); 1090 (void)printf("\nLSRR: "); 1091 for (;;) { 1092 pr_saddr(cp); 1093 cp += 4; 1094 hlen -= 4; 1095 j -= 4; 1096 if (j <= 0) 1097 break; 1098 (void)putchar('\n'); 1099 } 1100 break; 1101 case IPOPT_RR: 1102 j = *++cp; /* get length */ 1103 i = *++cp; /* and pointer */ 1104 hlen -= 2; 1105 if (i > j) 1106 i = j; 1107 i -= IPOPT_MINOFF; 1108 if (i <= 0) 1109 continue; 1110 if (dumped <= 1) { 1111 if (i == old_rrlen 1112 && !memcmp(cp, old_rr, i)) { 1113 if (dumped) 1114 (void)printf("\t(same route)"); 1115 j = ((i+3)/4)*4; 1116 hlen -= j; 1117 cp += j; 1118 break; 1119 } 1120 old_rrlen = i; 1121 (void) memcpy(old_rr, cp, i); 1122 } 1123 if (!dumped) { 1124 jiggle_flush(1); 1125 (void)printf("RR: "); 1126 dumped = 1; 1127 } else { 1128 (void)printf("\nRR: "); 1129 } 1130 for (;;) { 1131 pr_saddr(cp); 1132 cp += 4; 1133 hlen -= 4; 1134 i -= 4; 1135 if (i <= 0) 1136 break; 1137 (void)putchar('\n'); 1138 } 1139 break; 1140 case IPOPT_NOP: 1141 if (dumped <= 1) 1142 break; 1143 PR_PACK_SUB(); 1144 (void)printf("\nNOP"); 1145 break; 1146 #ifdef sgi 1147 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1148 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1149 case IPOPT_CIPSO: /* Commercial IPSO */ 1150 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1151 i = (unsigned)cp[1]; 1152 hlen -= i - 1; 1153 PR_PACK_SUB(); 1154 (void)printf("\nSEC:"); 1155 while (i--) { 1156 (void)printf(" %02x", *cp++); 1157 } 1158 cp--; 1159 break; 1160 } 1161 #endif 1162 default: 1163 PR_PACK_SUB(); 1164 (void)printf("\nunknown option 0x%x", *cp); 1165 break; 1166 } 1167 hlen--; 1168 cp++; 1169 } 1170 1171 if (dumped) { 1172 (void)putchar('\n'); 1173 (void)fflush(stdout); 1174 } else { 1175 jiggle(-1); 1176 } 1177 } 1178 1179 1180 /* Compute the IP checksum 1181 * This assumes the packet is less than 32K long. 1182 */ 1183 static u_int16_t 1184 in_cksum(u_int16_t *p, u_int len) 1185 { 1186 u_int32_t sum = 0; 1187 int nwords = len >> 1; 1188 1189 while (nwords-- != 0) 1190 sum += *p++; 1191 1192 if (len & 1) { 1193 union { 1194 u_int16_t w; 1195 u_int8_t c[2]; 1196 } u; 1197 u.c[0] = *(u_char *)p; 1198 u.c[1] = 0; 1199 sum += u.w; 1200 } 1201 1202 /* end-around-carry */ 1203 sum = (sum >> 16) + (sum & 0xffff); 1204 sum += (sum >> 16); 1205 return (~sum); 1206 } 1207 1208 1209 /* 1210 * compute the difference of two timevals in seconds 1211 */ 1212 static double 1213 diffsec(struct timeval *timenow, 1214 struct timeval *then) 1215 { 1216 return ((timenow->tv_sec - then->tv_sec)*1.0 1217 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1218 } 1219 1220 1221 static void 1222 timevaladd(struct timeval *t1, 1223 struct timeval *t2) 1224 { 1225 1226 t1->tv_sec += t2->tv_sec; 1227 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1228 t1->tv_sec++; 1229 t1->tv_usec -= 1000000; 1230 } 1231 } 1232 1233 1234 static void 1235 sec_to_timeval(const double sec, struct timeval *tp) 1236 { 1237 tp->tv_sec = sec; 1238 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1239 } 1240 1241 1242 static double 1243 timeval_to_sec(const struct timeval *tp) 1244 { 1245 return tp->tv_sec + tp->tv_usec / 1000000.0; 1246 } 1247 1248 1249 /* 1250 * Print statistics. 1251 * Heavily buffered STDIO is used here, so that all the statistics 1252 * will be written with 1 sys-write call. This is nice when more 1253 * than one copy of the program is running on a terminal; it prevents 1254 * the statistics output from becomming intermingled. 1255 */ 1256 static void 1257 summary(int header) 1258 { 1259 jiggle_flush(1); 1260 1261 if (header) 1262 (void)printf("\n----%s PING Statistics----\n", hostname); 1263 (void)printf("%d packets transmitted, ", ntransmitted); 1264 (void)printf("%d packets received, ", nreceived); 1265 if (nrepeats) 1266 (void)printf("+%d duplicates, ", nrepeats); 1267 if (ntransmitted) { 1268 if (nreceived > ntransmitted) 1269 (void)printf("-- somebody's duplicating packets!"); 1270 else 1271 (void)printf("%.1f%% packet loss", 1272 (((ntransmitted-nreceived)*100.0) / 1273 ntransmitted)); 1274 } 1275 (void)printf("\n"); 1276 if (nreceived && (pingflags & F_TIMING)) { 1277 double n = nreceived + nrepeats; 1278 double avg = (tsum / n); 1279 double variance = 0.0; 1280 if (n>1) 1281 variance = (tsumsq - n*avg*avg) /(n-1); 1282 1283 printf("round-trip min/avg/max/stddev = " 1284 "%.3f/%.3f/%.3f/%.3f ms\n", 1285 tmin * 1000.0, avg * 1000.0, 1286 tmax * 1000.0, sqrt(variance) * 1000.0); 1287 if (pingflags & F_FLOOD) { 1288 double r = diffsec(&last_rx, &first_rx); 1289 double t = diffsec(&last_tx, &first_tx); 1290 if (r == 0) 1291 r = 0.0001; 1292 if (t == 0) 1293 t = 0.0001; 1294 (void)printf(" %.1f packets/sec sent, " 1295 " %.1f packets/sec received\n", 1296 ntransmitted/t, nreceived/r); 1297 } 1298 } 1299 } 1300 1301 1302 /* 1303 * Print statistics when SIGINFO is received. 1304 */ 1305 /* ARGSUSED */ 1306 static void 1307 prtsig(int dummy) 1308 { 1309 summary(0); 1310 #ifdef SIGINFO 1311 (void)signal(SIGINFO, prtsig); 1312 #else 1313 (void)signal(SIGQUIT, prtsig); 1314 #endif 1315 } 1316 1317 1318 /* 1319 * On the first SIGINT, allow any outstanding packets to dribble in 1320 */ 1321 static void 1322 prefinish(int dummy) 1323 { 1324 if (lastrcvd /* quit now if caught up */ 1325 || nreceived == 0) /* or if remote is dead */ 1326 finish(0); 1327 1328 (void)signal(dummy, finish); /* do this only the 1st time */ 1329 1330 if (npackets > ntransmitted) /* let the normal limit work */ 1331 npackets = ntransmitted; 1332 } 1333 1334 1335 /* 1336 * Print statistics and give up. 1337 */ 1338 /* ARGSUSED */ 1339 static void 1340 finish(int dummy) 1341 { 1342 #if defined(SIGINFO) && defined(NOKERNINFO) 1343 struct termios ts; 1344 1345 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1346 ts.c_lflag &= ~NOKERNINFO; 1347 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 1348 } 1349 (void)signal(SIGINFO, SIG_IGN); 1350 #else 1351 (void)signal(SIGQUIT, SIG_DFL); 1352 #endif 1353 1354 summary(1); 1355 exit(nreceived > 0 ? 0 : 2); 1356 } 1357 1358 1359 static int /* 0=do not print it */ 1360 ck_pr_icmph(struct icmp *icp, 1361 struct sockaddr_in *from, 1362 int cc, 1363 int override) /* 1=override VERBOSE if interesting */ 1364 { 1365 int hlen; 1366 struct ip ipb, *ip = &ipb; 1367 struct icmp icp2b, *icp2 = &icp2b; 1368 int res; 1369 1370 if (pingflags & F_VERBOSE) { 1371 res = 1; 1372 jiggle_flush(1); 1373 } else { 1374 res = 0; 1375 } 1376 1377 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1378 hlen = ip->ip_hl << 2; 1379 if (ip->ip_p == IPPROTO_ICMP 1380 && hlen + 6 <= cc) { 1381 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1382 if (icp2->icmp_id == ident) { 1383 /* remember to clear route cached in kernel 1384 * if this non-Echo-Reply ICMP message was for one 1385 * of our packets. 1386 */ 1387 clear_cache.tv_sec = 0; 1388 1389 if (!res && override 1390 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1391 jiggle_flush(1); 1392 (void)printf("%d bytes from %s: ", 1393 cc, pr_addr(&from->sin_addr)); 1394 res = 1; 1395 } 1396 } 1397 } 1398 1399 return res; 1400 } 1401 1402 1403 /* 1404 * Print a descriptive string about an ICMP header other than an echo reply. 1405 */ 1406 static int /* 0=printed nothing */ 1407 pr_icmph(struct icmp *icp, 1408 struct sockaddr_in *from, 1409 int cc) 1410 { 1411 switch (icp->icmp_type ) { 1412 case ICMP_UNREACH: 1413 if (!ck_pr_icmph(icp, from, cc, 1)) 1414 return 0; 1415 switch (icp->icmp_code) { 1416 case ICMP_UNREACH_NET: 1417 (void)printf("Destination Net Unreachable"); 1418 break; 1419 case ICMP_UNREACH_HOST: 1420 (void)printf("Destination Host Unreachable"); 1421 break; 1422 case ICMP_UNREACH_PROTOCOL: 1423 (void)printf("Destination Protocol Unreachable"); 1424 break; 1425 case ICMP_UNREACH_PORT: 1426 (void)printf("Destination Port Unreachable"); 1427 break; 1428 case ICMP_UNREACH_NEEDFRAG: 1429 (void)printf("frag needed and DF set. Next MTU=%d", 1430 ntohs(icp->icmp_nextmtu)); 1431 break; 1432 case ICMP_UNREACH_SRCFAIL: 1433 (void)printf("Source Route Failed"); 1434 break; 1435 case ICMP_UNREACH_NET_UNKNOWN: 1436 (void)printf("Unreachable unknown net"); 1437 break; 1438 case ICMP_UNREACH_HOST_UNKNOWN: 1439 (void)printf("Unreachable unknown host"); 1440 break; 1441 case ICMP_UNREACH_ISOLATED: 1442 (void)printf("Unreachable host isolated"); 1443 break; 1444 case ICMP_UNREACH_NET_PROHIB: 1445 (void)printf("Net prohibited access"); 1446 break; 1447 case ICMP_UNREACH_HOST_PROHIB: 1448 (void)printf("Host prohibited access"); 1449 break; 1450 case ICMP_UNREACH_TOSNET: 1451 (void)printf("Bad TOS for net"); 1452 break; 1453 case ICMP_UNREACH_TOSHOST: 1454 (void)printf("Bad TOS for host"); 1455 break; 1456 case 13: 1457 (void)printf("Communication prohibited"); 1458 break; 1459 case 14: 1460 (void)printf("Host precedence violation"); 1461 break; 1462 case 15: 1463 (void)printf("Precedence cutoff"); 1464 break; 1465 default: 1466 (void)printf("Bad Destination Unreachable Code: %d", 1467 icp->icmp_code); 1468 break; 1469 } 1470 /* Print returned IP header information */ 1471 pr_retip(icp, cc); 1472 break; 1473 1474 case ICMP_SOURCEQUENCH: 1475 if (!ck_pr_icmph(icp, from, cc, 1)) 1476 return 0; 1477 (void)printf("Source Quench"); 1478 pr_retip(icp, cc); 1479 break; 1480 1481 case ICMP_REDIRECT: 1482 if (!ck_pr_icmph(icp, from, cc, 1)) 1483 return 0; 1484 switch (icp->icmp_code) { 1485 case ICMP_REDIRECT_NET: 1486 (void)printf("Redirect Network"); 1487 break; 1488 case ICMP_REDIRECT_HOST: 1489 (void)printf("Redirect Host"); 1490 break; 1491 case ICMP_REDIRECT_TOSNET: 1492 (void)printf("Redirect Type of Service and Network"); 1493 break; 1494 case ICMP_REDIRECT_TOSHOST: 1495 (void)printf("Redirect Type of Service and Host"); 1496 break; 1497 default: 1498 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1499 break; 1500 } 1501 (void)printf(" New router addr: %s", 1502 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1503 pr_retip(icp, cc); 1504 break; 1505 1506 case ICMP_ECHO: 1507 if (!ck_pr_icmph(icp, from, cc, 0)) 1508 return 0; 1509 (void)printf("Echo Request: ID=%d seq=%d", 1510 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1511 break; 1512 1513 case ICMP_ECHOREPLY: 1514 /* displaying other's pings is too noisey */ 1515 #if 0 1516 if (!ck_pr_icmph(icp, from, cc, 0)) 1517 return 0; 1518 (void)printf("Echo Reply: ID=%d seq=%d", 1519 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1520 break; 1521 #else 1522 return 0; 1523 #endif 1524 1525 case ICMP_ROUTERADVERT: 1526 if (!ck_pr_icmph(icp, from, cc, 0)) 1527 return 0; 1528 (void)printf("Router Discovery Advert"); 1529 break; 1530 1531 case ICMP_ROUTERSOLICIT: 1532 if (!ck_pr_icmph(icp, from, cc, 0)) 1533 return 0; 1534 (void)printf("Router Discovery Solicit"); 1535 break; 1536 1537 case ICMP_TIMXCEED: 1538 if (!ck_pr_icmph(icp, from, cc, 1)) 1539 return 0; 1540 switch (icp->icmp_code ) { 1541 case ICMP_TIMXCEED_INTRANS: 1542 (void)printf("Time To Live exceeded"); 1543 break; 1544 case ICMP_TIMXCEED_REASS: 1545 (void)printf("Frag reassembly time exceeded"); 1546 break; 1547 default: 1548 (void)printf("Time exceeded, Bad Code: %d", 1549 icp->icmp_code); 1550 break; 1551 } 1552 pr_retip(icp, cc); 1553 break; 1554 1555 case ICMP_PARAMPROB: 1556 if (!ck_pr_icmph(icp, from, cc, 1)) 1557 return 0; 1558 (void)printf("Parameter problem: pointer = 0x%02x", 1559 icp->icmp_hun.ih_pptr); 1560 pr_retip(icp, cc); 1561 break; 1562 1563 case ICMP_TSTAMP: 1564 if (!ck_pr_icmph(icp, from, cc, 0)) 1565 return 0; 1566 (void)printf("Timestamp"); 1567 break; 1568 1569 case ICMP_TSTAMPREPLY: 1570 if (!ck_pr_icmph(icp, from, cc, 0)) 1571 return 0; 1572 (void)printf("Timestamp Reply"); 1573 break; 1574 1575 case ICMP_IREQ: 1576 if (!ck_pr_icmph(icp, from, cc, 0)) 1577 return 0; 1578 (void)printf("Information Request"); 1579 break; 1580 1581 case ICMP_IREQREPLY: 1582 if (!ck_pr_icmph(icp, from, cc, 0)) 1583 return 0; 1584 (void)printf("Information Reply"); 1585 break; 1586 1587 case ICMP_MASKREQ: 1588 if (!ck_pr_icmph(icp, from, cc, 0)) 1589 return 0; 1590 (void)printf("Address Mask Request"); 1591 break; 1592 1593 case ICMP_MASKREPLY: 1594 if (!ck_pr_icmph(icp, from, cc, 0)) 1595 return 0; 1596 (void)printf("Address Mask Reply"); 1597 break; 1598 1599 default: 1600 if (!ck_pr_icmph(icp, from, cc, 0)) 1601 return 0; 1602 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1603 if (pingflags & F_VERBOSE) 1604 pr_iph(icp, cc); 1605 } 1606 1607 return 1; 1608 } 1609 1610 1611 /* 1612 * Print an IP header with options. 1613 */ 1614 static void 1615 pr_iph(struct icmp *icp, 1616 int cc) 1617 { 1618 int hlen; 1619 u_char *cp; 1620 struct ip ipb, *ip = &ipb; 1621 1622 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1623 1624 hlen = ip->ip_hl << 2; 1625 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1626 1627 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1628 (void)printf(" %1x %1x %02x %04x %04x", 1629 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1630 (void)printf(" %1x %04x", 1631 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1632 (void)printf(" %02x %02x %04x", 1633 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1634 (void)printf(" %15s ", 1635 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1636 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1637 /* dump any option bytes */ 1638 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1639 (void)printf("%02x", *cp++); 1640 } 1641 } 1642 1643 /* 1644 * Print an ASCII host address starting from a string of bytes. 1645 */ 1646 static void 1647 pr_saddr(u_char *cp) 1648 { 1649 n_long l; 1650 struct in_addr addr; 1651 1652 l = (u_char)*++cp; 1653 l = (l<<8) + (u_char)*++cp; 1654 l = (l<<8) + (u_char)*++cp; 1655 l = (l<<8) + (u_char)*++cp; 1656 addr.s_addr = htonl(l); 1657 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1658 } 1659 1660 1661 /* 1662 * Return an ASCII host address 1663 * as a dotted quad and optionally with a hostname 1664 */ 1665 static char * 1666 pr_addr(struct in_addr *addr) /* in network order */ 1667 { 1668 struct hostent *hp; 1669 static char buf[MAXHOSTNAMELEN+4+16+1]; 1670 1671 if ((pingflags & F_NUMERIC) 1672 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1673 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1674 } else { 1675 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1676 inet_ntoa(*addr)); 1677 } 1678 1679 return buf; 1680 } 1681 1682 /* 1683 * Dump some info on a returned (via ICMP) IP packet. 1684 */ 1685 static void 1686 pr_retip(struct icmp *icp, 1687 int cc) 1688 { 1689 int hlen; 1690 u_char *cp; 1691 struct ip ipb, *ip = &ipb; 1692 1693 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1694 1695 if (pingflags & F_VERBOSE) 1696 pr_iph(icp, cc); 1697 1698 hlen = ip->ip_hl << 2; 1699 cp = (u_char *) &icp->icmp_data[hlen]; 1700 1701 if (ip->ip_p == IPPROTO_TCP) { 1702 if (pingflags & F_VERBOSE) 1703 (void)printf("\n TCP: from port %u, to port %u", 1704 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1705 } else if (ip->ip_p == IPPROTO_UDP) { 1706 if (pingflags & F_VERBOSE) 1707 (void)printf("\n UDP: from port %u, to port %u", 1708 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1709 } else if (ip->ip_p == IPPROTO_ICMP) { 1710 struct icmp icp2; 1711 (void) memcpy(&icp2, cp, sizeof(icp2)); 1712 if (icp2.icmp_type == ICMP_ECHO) { 1713 if (pingflags & F_VERBOSE) 1714 (void)printf("\n ID=%u icmp_seq=%u", 1715 ntohs((u_int16_t)icp2.icmp_id), 1716 ntohs((u_int16_t)icp2.icmp_seq)); 1717 else 1718 (void)printf(" for icmp_seq=%u", 1719 ntohs((u_int16_t)icp2.icmp_seq)); 1720 } 1721 } 1722 } 1723 1724 static void 1725 fill(void) 1726 { 1727 int i, j, k; 1728 char *cp; 1729 int pat[16]; 1730 1731 for (cp = fill_pat; *cp != '\0'; cp++) { 1732 if (!isxdigit((unsigned char)*cp)) 1733 break; 1734 } 1735 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1736 (void)fflush(stdout); 1737 errx(1, "\"-p %s\": patterns must be specified with" 1738 " 1-32 hex digits\n", 1739 fill_pat); 1740 } 1741 1742 i = sscanf(fill_pat, 1743 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1744 &pat[0], &pat[1], &pat[2], &pat[3], 1745 &pat[4], &pat[5], &pat[6], &pat[7], 1746 &pat[8], &pat[9], &pat[10], &pat[11], 1747 &pat[12], &pat[13], &pat[14], &pat[15]); 1748 1749 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1750 opack_icmp.icmp_data[k] = pat[j]; 1751 if (++j >= i) 1752 j = 0; 1753 } 1754 1755 if (!(pingflags & F_QUIET)) { 1756 (void)printf("PATTERN: 0x"); 1757 for (j=0; j<i; j++) 1758 (void)printf("%02x", 1759 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1760 (void)printf("\n"); 1761 } 1762 1763 } 1764 1765 1766 static void 1767 rnd_fill(void) 1768 { 1769 static u_int32_t rnd; 1770 int i; 1771 1772 for (i = PHDR_LEN; i < datalen; i++) { 1773 rnd = (3141592621U * rnd + 663896637U); 1774 opack_icmp.icmp_data[i] = rnd>>24; 1775 } 1776 } 1777 1778 1779 static void 1780 gethost(const char *arg, 1781 const char *name, 1782 struct sockaddr_in *sa, 1783 char *realname, 1784 int realname_len) 1785 { 1786 struct hostent *hp; 1787 1788 (void)memset(sa, 0, sizeof(*sa)); 1789 sa->sin_family = AF_INET; 1790 sa->sin_len = sizeof(struct sockaddr_in); 1791 1792 /* If it is an IP address, try to convert it to a name to 1793 * have something nice to display. 1794 */ 1795 if (inet_aton(name, &sa->sin_addr) != 0) { 1796 if (realname) { 1797 if (pingflags & F_NUMERIC) 1798 hp = 0; 1799 else 1800 hp = gethostbyaddr((char *)&sa->sin_addr, 1801 sizeof(sa->sin_addr), 1802 AF_INET); 1803 (void)strlcpy(realname, hp ? hp->h_name : name, 1804 realname_len); 1805 } 1806 return; 1807 } 1808 1809 hp = gethostbyname(name); 1810 if (!hp) 1811 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1812 1813 if (hp->h_addrtype != AF_INET) 1814 errx(1, "%s only supported with IP", arg); 1815 1816 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1817 1818 if (realname) 1819 (void)strlcpy(realname, hp->h_name, realname_len); 1820 } 1821 1822 1823 static void 1824 usage(void) 1825 { 1826 #ifdef IPSEC 1827 #ifdef IPSEC_POLICY_IPSEC 1828 #define IPSECOPT "\n [-E policy] " 1829 #else 1830 #define IPSECOPT "\n [-AE] " 1831 #endif /*IPSEC_POLICY_IPSEC*/ 1832 #else 1833 #define IPSECOPT "" 1834 #endif /*IPSEC*/ 1835 1836 (void)fprintf(stderr, "Usage: \n" 1837 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1838 " [-i interval] [-I addr]\n" 1839 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1840 " [-w maxwait] " IPSECOPT "host\n", 1841 getprogname()); 1842 exit(1); 1843 } 1844
Indexes created Tue Sep 30 20:09:53 GMT 2025