ping.c revision 1.66
1 /* $NetBSD: ping.c,v 1.66 2002/08/12 18:24:53 matt 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 1.66 2002/08/12 18:24:53 matt 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 <limits.h> 81 #include <math.h> 82 #include <string.h> 83 #include <err.h> 84 #ifdef sgi 85 #include <bstring.h> 86 #include <getopt.h> 87 #include <sys/prctl.h> 88 #ifndef PRE_KUDZU 89 #include <cap_net.h> 90 #else 91 #define cap_socket socket 92 #endif 93 #else 94 #define cap_socket socket 95 #include <err.h> 96 #endif 97 98 #include <netinet/in_systm.h> 99 #include <netinet/in.h> 100 #include <netinet/ip.h> 101 #include <netinet/ip_icmp.h> 102 #include <netinet/ip_var.h> 103 #include <arpa/inet.h> 104 #include <ctype.h> 105 #include <netdb.h> 106 107 #ifdef IPSEC 108 #include <netinet6/ipsec.h> 109 #endif /*IPSEC*/ 110 111 #define FLOOD_INTVL 0.01 /* default flood output interval */ 112 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 113 114 #define F_VERBOSE 0x0001 115 #define F_QUIET 0x0002 /* minimize all output */ 116 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 117 #define F_FLOOD 0x0008 /* flood-ping */ 118 #define F_RECORD_ROUTE 0x0010 /* record route */ 119 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 120 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 121 #define F_PING_RANDOM 0x0080 /* use random data */ 122 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 123 #define F_TIMING 0x0200 /* room for a timestamp */ 124 #define F_DF 0x0400 /* set IP DF bit */ 125 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 126 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 127 #define F_MCAST 0x2000 /* multicast target */ 128 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 129 #define F_AUDIBLE 0x8000 /* audible output */ 130 #ifdef IPSEC 131 #ifdef IPSEC_POLICY_IPSEC 132 #define F_POLICY 0x10000 133 #else 134 #define F_AUTHHDR 0x10000 135 #define F_ENCRYPT 0x20000 136 #endif /*IPSEC_POLICY_IPSEC*/ 137 #endif /*IPSEC*/ 138 139 140 /* MAX_DUP_CHK is the number of bits in received table, the 141 * maximum number of received sequence numbers we can track to check 142 * for duplicates. 143 */ 144 #define MAX_DUP_CHK (8 * 2048) 145 u_char rcvd_tbl[MAX_DUP_CHK/8]; 146 int nrepeats = 0; 147 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 148 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 149 #define SET(seq) (A(seq) |= B(seq)) 150 #define CLR(seq) (A(seq) &= (~B(seq))) 151 #define TST(seq) (A(seq) & B(seq)) 152 153 154 155 u_char *packet; 156 int packlen; 157 int pingflags = 0, options; 158 char *fill_pat; 159 160 int s; /* Socket file descriptor */ 161 int sloop; /* Socket file descriptor/loopback */ 162 163 #define PHDR_LEN sizeof(struct timeval) /* size of timestamp header */ 164 struct sockaddr_in whereto, send_addr; /* Who to ping */ 165 struct sockaddr_in src_addr; /* from where */ 166 struct sockaddr_in loc_addr; /* 127.1 */ 167 int datalen = 64-PHDR_LEN; /* How much data */ 168 169 #ifndef __NetBSD__ 170 static char *progname; 171 #define getprogname() (progname) 172 #define setprogname(name) ((void)(progname = (name))) 173 #endif 174 175 char hostname[MAXHOSTNAMELEN]; 176 177 static struct { 178 struct ip o_ip; 179 char o_opt[MAX_IPOPTLEN]; 180 union { 181 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 182 struct icmp u_icmp; 183 } o_u; 184 } out_pack; 185 #define opack_icmp out_pack.o_u.u_icmp 186 struct ip *opack_ip; 187 188 char optspace[MAX_IPOPTLEN]; /* record route space */ 189 int optlen; 190 191 192 int npackets; /* total packets to send */ 193 int preload; /* number of packets to "preload" */ 194 int ntransmitted; /* output sequence # = #sent */ 195 int ident; /* our ID, in network byte order */ 196 197 int nreceived; /* # of packets we got back */ 198 199 double interval; /* interval between packets */ 200 struct timeval interval_tv; 201 double tmin = 999999999.0; 202 double tmax = 0.0; 203 double tsum = 0.0; /* sum of all times */ 204 double tsumsq = 0.0; 205 double maxwait = 0.0; 206 207 #ifdef SIGINFO 208 int reset_kerninfo; 209 #endif 210 211 int bufspace = IP_MAXPACKET; 212 213 struct timeval now, clear_cache, last_tx, next_tx, first_tx; 214 struct timeval last_rx, first_rx; 215 int lastrcvd = 1; /* last ping sent has been received */ 216 217 static struct timeval jiggle_time; 218 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 219 220 static void doit(void); 221 static void prefinish(int); 222 static void prtsig(int); 223 static void finish(int); 224 static void summary(int); 225 static void pinger(void); 226 static void fill(void); 227 static void rnd_fill(void); 228 static double diffsec(struct timeval *, struct timeval *); 229 static void timevaladd(struct timeval *, struct timeval *); 230 static void sec_to_timeval(const double, struct timeval *); 231 static double timeval_to_sec(const struct timeval *); 232 static void pr_pack(u_char *, int, struct sockaddr_in *); 233 static u_int16_t in_cksum(u_int16_t *, u_int); 234 static void pr_saddr(u_char *); 235 static char *pr_addr(struct in_addr *); 236 static void pr_iph(struct icmp *, int); 237 static void pr_retip(struct icmp *, int); 238 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 239 static void jiggle(int), jiggle_flush(int); 240 static void gethost(const char *, const char *, 241 struct sockaddr_in *, char *, int); 242 static void usage(void); 243 244 245 int 246 main(int argc, char *argv[]) 247 { 248 int c, i, on = 1, hostind = 0; 249 long l; 250 u_char ttl = 0; 251 u_long tos = 0; 252 char *p; 253 #ifdef SIGINFO 254 struct termios ts; 255 #endif 256 #ifdef IPSEC 257 #ifdef IPSEC_POLICY_IPSEC 258 char *policy_in = NULL; 259 char *policy_out = NULL; 260 #endif 261 #endif 262 263 264 setprogname(argv[0]); 265 266 #ifndef IPSEC 267 #define IPSECOPT 268 #else 269 #ifdef IPSEC_POLICY_IPSEC 270 #define IPSECOPT "E:" 271 #else 272 #define IPSECOPT "AE" 273 #endif /*IPSEC_POLICY_IPSEC*/ 274 #endif 275 while ((c = getopt(argc, argv, 276 "ac:dDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 277 #undef IPSECOPT 278 switch (c) { 279 case 'a': 280 pingflags |= F_AUDIBLE; 281 break; 282 case 'c': 283 npackets = strtol(optarg, &p, 0); 284 if (*p != '\0' || npackets <= 0) 285 errx(1, "Bad/invalid number of packets"); 286 break; 287 case 'D': 288 pingflags |= F_DF; 289 break; 290 case 'd': 291 options |= SO_DEBUG; 292 break; 293 case 'f': 294 pingflags |= F_FLOOD; 295 break; 296 case 'h': 297 hostind = optind-1; 298 break; 299 case 'i': /* wait between sending packets */ 300 interval = strtod(optarg, &p); 301 if (*p != '\0' || interval <= 0) 302 errx(1, "Bad/invalid interval %s", optarg); 303 break; 304 case 'l': 305 preload = strtol(optarg, &p, 0); 306 if (*p != '\0' || preload < 0) 307 errx(1, "Bad/invalid preload value %s", 308 optarg); 309 break; 310 case 'n': 311 pingflags |= F_NUMERIC; 312 break; 313 case 'o': 314 pingflags |= F_ONCE; 315 break; 316 case 'p': /* fill buffer with user pattern */ 317 if (pingflags & F_PING_RANDOM) 318 errx(1, "Only one of -P and -p allowed"); 319 pingflags |= F_PING_FILLED; 320 fill_pat = optarg; 321 break; 322 case 'P': 323 if (pingflags & F_PING_FILLED) 324 errx(1, "Only one of -P and -p allowed"); 325 pingflags |= F_PING_RANDOM; 326 break; 327 case 'q': 328 pingflags |= F_QUIET; 329 break; 330 case 'Q': 331 pingflags |= F_SEMI_QUIET; 332 break; 333 case 'r': 334 options |= SO_DONTROUTE; 335 break; 336 case 's': /* size of packet to send */ 337 datalen = strtol(optarg, &p, 0); 338 if (*p != '\0' || datalen <= 0) 339 errx(1, "Bad/invalid packet size %s", optarg); 340 if (datalen > MAXPACKET) 341 errx(1, "packet size is too large"); 342 break; 343 case 'v': 344 pingflags |= F_VERBOSE; 345 break; 346 case 'R': 347 pingflags |= F_RECORD_ROUTE; 348 break; 349 case 'L': 350 pingflags |= F_MCAST_NOLOOP; 351 break; 352 case 't': 353 tos = strtoul(optarg, &p, 0); 354 if (*p != '\0' || tos > 0xFF) 355 errx(1, "bad tos value: %s", optarg); 356 break; 357 case 'T': 358 l = strtol(optarg, &p, 0); 359 if (*p != '\0' || l > 255 || l <= 0) 360 errx(1, "ttl out of range"); 361 ttl = (u_char)l; /* cannot check >255 otherwise */ 362 break; 363 case 'I': 364 pingflags |= F_SOURCE_ADDR; 365 gethost("-I", optarg, &src_addr, 0, 0); 366 break; 367 case 'g': 368 pingflags |= F_SOURCE_ROUTE; 369 gethost("-g", optarg, &send_addr, 0, 0); 370 break; 371 case 'w': 372 maxwait = strtod(optarg, &p); 373 if (*p != '\0' || maxwait <= 0) 374 errx(1, "Bad/invalid maxwait time %s", optarg); 375 break; 376 #ifdef IPSEC 377 #ifdef IPSEC_POLICY_IPSEC 378 case 'E': 379 pingflags |= F_POLICY; 380 if (!strncmp("in", optarg, 2)) 381 policy_in = strdup(optarg); 382 else if (!strncmp("out", optarg, 3)) 383 policy_out = strdup(optarg); 384 else 385 errx(1, "invalid security policy"); 386 break; 387 #else 388 case 'A': 389 pingflags |= F_AUTHHDR; 390 break; 391 case 'E': 392 pingflags |= F_ENCRYPT; 393 break; 394 #endif /*IPSEC_POLICY_IPSEC*/ 395 #endif /*IPSEC*/ 396 default: 397 usage(); 398 break; 399 } 400 } 401 402 if (interval == 0) 403 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 404 #ifndef sgi 405 if (pingflags & F_FLOOD && getuid()) 406 errx(1, "Must be superuser to use -f"); 407 if (interval < 1.0 && getuid()) 408 errx(1, "Must be superuser to use < 1 sec ping interval"); 409 if (preload > 0 && getuid()) 410 errx(1, "Must be superuser to use -l"); 411 #endif 412 sec_to_timeval(interval, &interval_tv); 413 414 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 415 warnx("Sorry, no audible output for flood pings"); 416 417 if (npackets != 0) { 418 npackets += preload; 419 } else { 420 npackets = INT_MAX; 421 } 422 423 if (hostind == 0) { 424 if (optind != argc-1) 425 usage(); 426 else 427 hostind = optind; 428 } 429 else if (hostind >= argc - 1) 430 usage(); 431 432 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 433 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 434 pingflags |= F_MCAST; 435 if (!(pingflags & F_SOURCE_ROUTE)) 436 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 437 438 loc_addr.sin_family = AF_INET; 439 loc_addr.sin_addr.s_addr = htonl((127<<24)+1); 440 441 if (datalen >= PHDR_LEN) /* can we time them? */ 442 pingflags |= F_TIMING; 443 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 444 if ((packet = (u_char *)malloc(packlen)) == NULL) 445 err(1, "Out of memory"); 446 447 if (pingflags & F_PING_FILLED) { 448 fill(); 449 } else if (pingflags & F_PING_RANDOM) { 450 rnd_fill(); 451 } else { 452 for (i = PHDR_LEN; i < datalen; i++) 453 opack_icmp.icmp_data[i] = i; 454 } 455 456 ident = htons(getpid()) & 0xFFFF; 457 458 if ((s = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 459 err(1, "Cannot create socket"); 460 if (options & SO_DEBUG) { 461 if (setsockopt(s, SOL_SOCKET, SO_DEBUG, 462 (char *)&on, sizeof(on)) == -1) 463 warn("Can't turn on socket debugging"); 464 } 465 if (options & SO_DONTROUTE) { 466 if (setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 467 (char *)&on, sizeof(on)) == -1) 468 warn("SO_DONTROUTE"); 469 } 470 471 if ((sloop = cap_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 472 err(1, "Cannot create socket"); 473 if (options & SO_DEBUG) { 474 if (setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 475 (char *)&on, sizeof(on)) == -1) 476 warn("Can't turn on socket debugging"); 477 } 478 if (options & SO_DONTROUTE) { 479 if (setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 480 (char *)&on, sizeof(on)) == -1) 481 warn("SO_DONTROUTE"); 482 } 483 484 if (pingflags & F_SOURCE_ROUTE) { 485 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 486 optspace[IPOPT_OLEN] = optlen = 7; 487 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 488 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 489 sizeof(whereto.sin_addr)); 490 optspace[optlen++] = IPOPT_NOP; 491 } 492 if (pingflags & F_RECORD_ROUTE) { 493 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 494 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 495 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 496 optlen = MAX_IPOPTLEN; 497 } 498 /* this leaves opack_ip 0(mod 4) aligned */ 499 opack_ip = (struct ip *)((char *)&out_pack.o_ip 500 + sizeof(out_pack.o_opt) 501 - optlen); 502 (void) memcpy(opack_ip + 1, optspace, optlen); 503 504 if (setsockopt(s,IPPROTO_IP,IP_HDRINCL, (char *) &on, sizeof(on)) < 0) 505 err(1, "Can't set special IP header"); 506 507 opack_ip->ip_v = IPVERSION; 508 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 509 opack_ip->ip_tos = tos; 510 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 511 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 512 opack_ip->ip_p = IPPROTO_ICMP; 513 opack_ip->ip_src = src_addr.sin_addr; 514 opack_ip->ip_dst = send_addr.sin_addr; 515 516 if (pingflags & F_MCAST) { 517 if (pingflags & F_MCAST_NOLOOP) { 518 u_char loop = 0; 519 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_LOOP, 520 (char *) &loop, 1) < 0) 521 err(1, "Can't disable multicast loopback"); 522 } 523 524 if (ttl != 0 525 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 526 (char *) &ttl, 1) < 0) 527 err(1, "Can't set multicast time-to-live"); 528 529 if ((pingflags & F_SOURCE_ADDR) 530 && setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 531 (char *) &src_addr.sin_addr, 532 sizeof(src_addr.sin_addr)) < 0) 533 err(1, "Can't set multicast source interface"); 534 535 } else if (pingflags & F_SOURCE_ADDR) { 536 if (setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 537 (char *) &src_addr.sin_addr, 538 sizeof(src_addr.sin_addr)) < 0) 539 err(1, "Can't set source interface/address"); 540 } 541 #ifdef IPSEC 542 #ifdef IPSEC_POLICY_IPSEC 543 { 544 char *buf; 545 if (pingflags & F_POLICY) { 546 if (policy_in != NULL) { 547 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 548 if (buf == NULL) 549 errx(1, "%s", ipsec_strerror()); 550 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 551 buf, ipsec_get_policylen(buf)) < 0) { 552 err(1, "ipsec policy cannot be configured"); 553 } 554 free(buf); 555 } 556 if (policy_out != NULL) { 557 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 558 if (buf == NULL) 559 errx(1, "%s", ipsec_strerror()); 560 if (setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 561 buf, ipsec_get_policylen(buf)) < 0) { 562 err(1, "ipsec policy cannot be configured"); 563 } 564 free(buf); 565 } 566 } 567 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 568 if (buf == NULL) 569 errx(1, "%s", ipsec_strerror()); 570 if (setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 571 buf, ipsec_get_policylen(buf)) < 0) { 572 #if 0 573 warnx("ipsec is not configured"); 574 #else 575 /* ignore it, should be okay */ 576 #endif 577 } 578 free(buf); 579 } 580 #else 581 { 582 int optval; 583 if (pingflags & F_AUTHHDR) { 584 optval = IPSEC_LEVEL_REQUIRE; 585 #ifdef IP_AUTH_TRANS_LEVEL 586 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 587 (char *)&optval, sizeof(optval)); 588 #else 589 (void)setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 590 (char *)&optval, sizeof(optval)); 591 #endif 592 } 593 if (pingflags & F_ENCRYPT) { 594 optval = IPSEC_LEVEL_REQUIRE; 595 (void)setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 596 (char *)&optval, sizeof(optval)); 597 } 598 optval = IPSEC_LEVEL_BYPASS; 599 #ifdef IP_AUTH_TRANS_LEVEL 600 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 601 (char *)&optval, sizeof(optval)); 602 #else 603 (void)setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 604 (char *)&optval, sizeof(optval)); 605 #endif 606 (void)setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 607 (char *)&optval, sizeof(optval)); 608 } 609 #endif /*IPSEC_POLICY_IPSEC*/ 610 #endif /*IPSEC*/ 611 612 (void)printf("PING %s (%s): %d data bytes\n", hostname, 613 inet_ntoa(whereto.sin_addr), datalen); 614 615 /* When pinging the broadcast address, you can get a lot 616 * of answers. Doing something so evil is useful if you 617 * are trying to stress the ethernet, or just want to 618 * fill the arp cache to get some stuff for /etc/ethers. 619 */ 620 while (0 > setsockopt(s, SOL_SOCKET, SO_RCVBUF, 621 (char*)&bufspace, sizeof(bufspace))) { 622 if ((bufspace -= 4096) <= 0) 623 err(1, "Cannot set the receive buffer size"); 624 } 625 626 /* make it possible to send giant probes, but do not worry now 627 * if it fails, since we probably won't send giant probes. 628 */ 629 (void)setsockopt(s, SOL_SOCKET, SO_SNDBUF, 630 (char*)&bufspace, sizeof(bufspace)); 631 632 (void)signal(SIGINT, prefinish); 633 634 #if defined(SIGINFO) && defined(NOKERNINFO) 635 if (tcgetattr (0, &ts) != -1) { 636 reset_kerninfo = !(ts.c_lflag & NOKERNINFO); 637 ts.c_lflag |= NOKERNINFO; 638 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 639 } 640 #endif 641 642 #ifdef SIGINFO 643 (void)signal(SIGINFO, prtsig); 644 #else 645 (void)signal(SIGQUIT, prtsig); 646 #endif 647 (void)signal(SIGCONT, prtsig); 648 649 /* fire off them quickies */ 650 for (i = 0; i < preload; i++) { 651 (void)gettimeofday(&now, 0); 652 pinger(); 653 } 654 655 doit(); 656 return 0; 657 } 658 659 660 static void 661 doit(void) 662 { 663 int cc; 664 struct sockaddr_in from; 665 int fromlen; 666 double sec, last, d_last; 667 struct timeval timeout; 668 fd_set *fdmaskp; 669 size_t nfdmask; 670 671 (void)gettimeofday(&clear_cache,0); 672 if (maxwait != 0) { 673 last = timeval_to_sec(&clear_cache) + maxwait; 674 d_last = 0; 675 } else { 676 last = 0; 677 d_last = 365*24*60*60; 678 } 679 680 nfdmask = howmany(s + 1, NFDBITS) * sizeof(fd_mask); 681 if ((fdmaskp = malloc(nfdmask)) == NULL) 682 err(1, "malloc"); 683 memset(fdmaskp, 0, nfdmask); 684 do { 685 (void)gettimeofday(&now,0); 686 687 if (last != 0) 688 d_last = last - timeval_to_sec(&now); 689 690 if (ntransmitted < npackets && d_last > 0) { 691 /* send if within 100 usec or late for next packet */ 692 sec = diffsec(&next_tx,&now); 693 if (sec <= 0.0001 694 || (lastrcvd && (pingflags & F_FLOOD))) { 695 pinger(); 696 sec = diffsec(&next_tx,&now); 697 } 698 if (sec < 0.0) 699 sec = 0.0; 700 if (d_last < sec) 701 sec = d_last; 702 703 } else { 704 /* For the last response, wait twice as long as the 705 * worst case seen, or 10 times as long as the 706 * maximum interpacket interval, whichever is longer. 707 */ 708 sec = MAX(2*tmax,10*interval) - diffsec(&now,&last_tx); 709 if (d_last < sec) 710 sec = d_last; 711 if (sec <= 0) 712 break; 713 } 714 715 716 sec_to_timeval(sec, &timeout); 717 718 FD_SET(s, fdmaskp); 719 cc = select(s+1, fdmaskp, 0, 0, &timeout); 720 if (cc <= 0) { 721 if (cc < 0) { 722 if (errno == EINTR) 723 continue; 724 jiggle_flush(1); 725 err(1, "select"); 726 } 727 continue; 728 } 729 730 fromlen = sizeof(from); 731 cc = recvfrom(s, (char *) packet, packlen, 732 0, (struct sockaddr *)&from, 733 &fromlen); 734 if (cc < 0) { 735 if (errno != EINTR) { 736 jiggle_flush(1); 737 warn("recvfrom"); 738 (void)fflush(stderr); 739 } 740 continue; 741 } 742 (void)gettimeofday(&now, 0); 743 pr_pack(packet, cc, &from); 744 745 } while (nreceived < npackets 746 && (nreceived == 0 || !(pingflags & F_ONCE))); 747 free(fdmaskp); 748 749 finish(0); 750 } 751 752 753 static void 754 jiggle_flush(int nl) /* new line if there are dots */ 755 { 756 int serrno = errno; 757 758 if (jiggle_cnt > 0) { 759 total_jiggled += jiggle_cnt; 760 jiggle_direction = 1; 761 do { 762 (void)putchar('.'); 763 } while (--jiggle_cnt > 0); 764 765 } else if (jiggle_cnt < 0) { 766 total_jiggled -= jiggle_cnt; 767 jiggle_direction = -1; 768 do { 769 (void)putchar('\b'); 770 } while (++jiggle_cnt < 0); 771 } 772 773 if (nl) { 774 if (total_jiggled != 0) 775 (void)putchar('\n'); 776 total_jiggled = 0; 777 jiggle_direction = -1; 778 } 779 780 (void)fflush(stdout); 781 (void)fflush(stderr); 782 jiggle_time = now; 783 errno = serrno; 784 } 785 786 787 /* jiggle the cursor for flood-ping 788 */ 789 static void 790 jiggle(int delta) 791 { 792 double dt; 793 794 if (pingflags & F_QUIET) 795 return; 796 797 /* do not back up into messages */ 798 if (total_jiggled+jiggle_cnt+delta < 0) 799 return; 800 801 jiggle_cnt += delta; 802 803 /* flush the FLOOD dots when things are quiet 804 * or occassionally to make the cursor jiggle. 805 */ 806 dt = diffsec(&last_tx, &jiggle_time); 807 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 808 jiggle_flush(0); 809 } 810 811 812 /* 813 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 814 * will be added on by the kernel. The ID field is our UNIX process ID, 815 * and the sequence number is an ascending integer. The first PHDR_LEN bytes 816 * of the data portion are used to hold a UNIX "timeval" struct in VAX 817 * byte-order, to compute the round-trip time. 818 */ 819 static void 820 pinger(void) 821 { 822 int i, cc, sw; 823 824 opack_icmp.icmp_code = 0; 825 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 826 827 /* clear the cached route in the kernel after an ICMP 828 * response such as a Redirect is seen to stop causing 829 * more such packets. Also clear the cached route 830 * periodically in case of routing changes that make 831 * black holes come and go. 832 */ 833 if (clear_cache.tv_sec != now.tv_sec) { 834 opack_icmp.icmp_type = ICMP_ECHOREPLY; 835 opack_icmp.icmp_id = ~ident; 836 opack_icmp.icmp_cksum = 0; 837 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 838 PHDR_LEN); 839 sw = 0; 840 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 841 (char *)&sw,sizeof(sw)) < 0) 842 err(1, "Can't turn off special IP header"); 843 if (sendto(sloop, (char *) &opack_icmp, PHDR_LEN, MSG_DONTROUTE, 844 (struct sockaddr *)&loc_addr, 845 sizeof(struct sockaddr_in)) < 0) { 846 /* 847 * XXX: we only report this as a warning in verbose 848 * mode because people get confused when they see 849 * this error when they are running in single user 850 * mode and they have not configured lo0 851 */ 852 if (pingflags & F_VERBOSE) 853 warn("failed to clear cached route"); 854 } 855 sw = 1; 856 if (setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 857 (char *)&sw, sizeof(sw)) < 0) 858 err(1, "Can't set special IP header"); 859 860 (void)gettimeofday(&clear_cache,0); 861 } 862 863 opack_icmp.icmp_type = ICMP_ECHO; 864 opack_icmp.icmp_id = ident; 865 if (pingflags & F_TIMING) 866 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 867 cc = datalen+PHDR_LEN; 868 opack_icmp.icmp_cksum = 0; 869 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 870 871 cc += opack_ip->ip_hl<<2; 872 opack_ip->ip_len = cc; 873 i = sendto(s, (char *) opack_ip, cc, 0, 874 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 875 if (i != cc) { 876 jiggle_flush(1); 877 if (i < 0) 878 warn("sendto"); 879 else 880 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 881 (void)fflush(stderr); 882 } 883 lastrcvd = 0; 884 885 CLR(ntransmitted); 886 ntransmitted++; 887 888 last_tx = now; 889 if (next_tx.tv_sec == 0) { 890 first_tx = now; 891 next_tx = now; 892 } 893 894 /* Transmit regularly, at always the same microsecond in the 895 * second when going at one packet per second. 896 * If we are at most 100 ms behind, send extras to get caught up. 897 * Otherwise, skip packets we were too slow to send. 898 */ 899 if (diffsec(&next_tx, &now) <= interval) { 900 do { 901 timevaladd(&next_tx, &interval_tv); 902 } while (diffsec(&next_tx, &now) < -0.1); 903 } 904 905 if (pingflags & F_FLOOD) 906 jiggle(1); 907 908 /* While the packet is going out, ready buffer for the next 909 * packet. Use a fast but not very good random number generator. 910 */ 911 if (pingflags & F_PING_RANDOM) 912 rnd_fill(); 913 } 914 915 916 static void 917 pr_pack_sub(int cc, 918 char *addr, 919 int seqno, 920 int dupflag, 921 int ttl, 922 double triptime) 923 { 924 jiggle_flush(1); 925 926 if (pingflags & F_FLOOD) 927 return; 928 929 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 930 if (dupflag) 931 (void)printf(" DUP!"); 932 (void)printf(" ttl=%d", ttl); 933 if (pingflags & F_TIMING) 934 (void)printf(" time=%.3f ms", triptime*1000.0); 935 936 /* 937 * Send beep to stderr, since that's more likely than stdout 938 * to go to a terminal.. 939 */ 940 if (pingflags & F_AUDIBLE && !dupflag) 941 (void)fprintf(stderr,"\a"); 942 } 943 944 945 /* 946 * Print out the packet, if it came from us. This logic is necessary 947 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 948 * which arrive ('tis only fair). This permits multiple copies of this 949 * program to be run without having intermingled output (or statistics!). 950 */ 951 static void 952 pr_pack(u_char *buf, 953 int tot_len, 954 struct sockaddr_in *from) 955 { 956 struct ip *ip; 957 struct icmp *icp; 958 int i, j, net_len; 959 u_char *cp; 960 static int old_rrlen; 961 static char old_rr[MAX_IPOPTLEN]; 962 int hlen, dupflag = 0, dumped; 963 double triptime = 0.0; 964 #define PR_PACK_SUB() {if (!dumped) { \ 965 dumped = 1; \ 966 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 967 ntohs((u_int16_t)icp->icmp_seq), \ 968 dupflag, ip->ip_ttl, triptime);}} 969 970 /* Check the IP header */ 971 ip = (struct ip *) buf; 972 hlen = ip->ip_hl << 2; 973 if (tot_len < hlen + ICMP_MINLEN) { 974 if (pingflags & F_VERBOSE) { 975 jiggle_flush(1); 976 (void)printf("packet too short (%d bytes) from %s\n", 977 tot_len, inet_ntoa(from->sin_addr)); 978 } 979 return; 980 } 981 982 /* Now the ICMP part */ 983 dumped = 0; 984 net_len = tot_len - hlen; 985 icp = (struct icmp *)(buf + hlen); 986 if (icp->icmp_type == ICMP_ECHOREPLY 987 && icp->icmp_id == ident) { 988 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 989 lastrcvd = 1; 990 last_rx = now; 991 if (first_rx.tv_sec == 0) 992 first_rx = last_rx; 993 nreceived++; 994 if (pingflags & F_TIMING) { 995 struct timeval tv; 996 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 997 triptime = diffsec(&last_rx, &tv); 998 tsum += triptime; 999 tsumsq += triptime * triptime; 1000 if (triptime < tmin) 1001 tmin = triptime; 1002 if (triptime > tmax) 1003 tmax = triptime; 1004 } 1005 1006 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1007 nrepeats++, nreceived--; 1008 dupflag=1; 1009 } else { 1010 SET(ntohs((u_int16_t)icp->icmp_seq)); 1011 } 1012 1013 if (tot_len != opack_ip->ip_len) { 1014 PR_PACK_SUB(); 1015 (void)printf("\nwrong total length %d instead of %d", 1016 tot_len, opack_ip->ip_len); 1017 } 1018 1019 if (!dupflag) { 1020 static u_int16_t last_seqno = 0xffff; 1021 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1022 u_int16_t gap = seqno - (last_seqno + 1); 1023 if (gap > 0 && gap < 0x8000 && 1024 (pingflags & F_VERBOSE)) { 1025 (void)printf("[*** sequence gap of %u " 1026 "packets from %u ... %u ***]\n", gap, 1027 (u_int16_t) (last_seqno + 1), 1028 (u_int16_t) (seqno - 1)); 1029 if (pingflags & F_QUIET) 1030 summary(0); 1031 } 1032 1033 if (gap < 0x8000) 1034 last_seqno = seqno; 1035 } 1036 1037 if (pingflags & F_QUIET) 1038 return; 1039 1040 if (!(pingflags & F_FLOOD)) 1041 PR_PACK_SUB(); 1042 1043 /* check the data */ 1044 if (datalen > PHDR_LEN 1045 && !(pingflags & F_PING_RANDOM) 1046 && memcmp(&icp->icmp_data[PHDR_LEN], 1047 &opack_icmp.icmp_data[PHDR_LEN], 1048 datalen-PHDR_LEN)) { 1049 for (i=PHDR_LEN; i<datalen; i++) { 1050 if (icp->icmp_data[i] != 1051 opack_icmp.icmp_data[i]) 1052 break; 1053 } 1054 PR_PACK_SUB(); 1055 (void)printf("\nwrong data byte #%d should have been" 1056 " %#x but was %#x", i, 1057 (u_char)opack_icmp.icmp_data[i], 1058 (u_char)icp->icmp_data[i]); 1059 for (i=PHDR_LEN; i<datalen; i++) { 1060 if ((i%16) == PHDR_LEN) 1061 (void)printf("\n\t"); 1062 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1063 } 1064 } 1065 1066 } else { 1067 if (!pr_icmph(icp, from, net_len)) 1068 return; 1069 dumped = 2; 1070 } 1071 1072 /* Display any IP options */ 1073 cp = buf + sizeof(struct ip); 1074 while (hlen > (int)sizeof(struct ip)) { 1075 switch (*cp) { 1076 case IPOPT_EOL: 1077 hlen = 0; 1078 break; 1079 case IPOPT_LSRR: 1080 hlen -= 2; 1081 j = *++cp; 1082 ++cp; 1083 j -= IPOPT_MINOFF; 1084 if (j <= 0) 1085 continue; 1086 if (dumped <= 1) { 1087 j = ((j+3)/4)*4; 1088 hlen -= j; 1089 cp += j; 1090 break; 1091 } 1092 PR_PACK_SUB(); 1093 (void)printf("\nLSRR: "); 1094 for (;;) { 1095 pr_saddr(cp); 1096 cp += 4; 1097 hlen -= 4; 1098 j -= 4; 1099 if (j <= 0) 1100 break; 1101 (void)putchar('\n'); 1102 } 1103 break; 1104 case IPOPT_RR: 1105 j = *++cp; /* get length */ 1106 i = *++cp; /* and pointer */ 1107 hlen -= 2; 1108 if (i > j) 1109 i = j; 1110 i -= IPOPT_MINOFF; 1111 if (i <= 0) 1112 continue; 1113 if (dumped <= 1) { 1114 if (i == old_rrlen 1115 && !memcmp(cp, old_rr, i)) { 1116 if (dumped) 1117 (void)printf("\t(same route)"); 1118 j = ((i+3)/4)*4; 1119 hlen -= j; 1120 cp += j; 1121 break; 1122 } 1123 old_rrlen = i; 1124 (void) memcpy(old_rr, cp, i); 1125 } 1126 if (!dumped) { 1127 jiggle_flush(1); 1128 (void)printf("RR: "); 1129 dumped = 1; 1130 } else { 1131 (void)printf("\nRR: "); 1132 } 1133 for (;;) { 1134 pr_saddr(cp); 1135 cp += 4; 1136 hlen -= 4; 1137 i -= 4; 1138 if (i <= 0) 1139 break; 1140 (void)putchar('\n'); 1141 } 1142 break; 1143 case IPOPT_NOP: 1144 if (dumped <= 1) 1145 break; 1146 PR_PACK_SUB(); 1147 (void)printf("\nNOP"); 1148 break; 1149 #ifdef sgi 1150 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1151 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1152 case IPOPT_CIPSO: /* Commercial IPSO */ 1153 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1154 i = (unsigned)cp[1]; 1155 hlen -= i - 1; 1156 PR_PACK_SUB(); 1157 (void)printf("\nSEC:"); 1158 while (i--) { 1159 (void)printf(" %02x", *cp++); 1160 } 1161 cp--; 1162 break; 1163 } 1164 #endif 1165 default: 1166 PR_PACK_SUB(); 1167 (void)printf("\nunknown option 0x%x", *cp); 1168 break; 1169 } 1170 hlen--; 1171 cp++; 1172 } 1173 1174 if (dumped) { 1175 (void)putchar('\n'); 1176 (void)fflush(stdout); 1177 } else { 1178 jiggle(-1); 1179 } 1180 } 1181 1182 1183 /* Compute the IP checksum 1184 * This assumes the packet is less than 32K long. 1185 */ 1186 static u_int16_t 1187 in_cksum(u_int16_t *p, u_int len) 1188 { 1189 u_int32_t sum = 0; 1190 int nwords = len >> 1; 1191 1192 while (nwords-- != 0) 1193 sum += *p++; 1194 1195 if (len & 1) { 1196 union { 1197 u_int16_t w; 1198 u_int8_t c[2]; 1199 } u; 1200 u.c[0] = *(u_char *)p; 1201 u.c[1] = 0; 1202 sum += u.w; 1203 } 1204 1205 /* end-around-carry */ 1206 sum = (sum >> 16) + (sum & 0xffff); 1207 sum += (sum >> 16); 1208 return (~sum); 1209 } 1210 1211 1212 /* 1213 * compute the difference of two timevals in seconds 1214 */ 1215 static double 1216 diffsec(struct timeval *timenow, 1217 struct timeval *then) 1218 { 1219 return ((timenow->tv_sec - then->tv_sec)*1.0 1220 + (timenow->tv_usec - then->tv_usec)/1000000.0); 1221 } 1222 1223 1224 static void 1225 timevaladd(struct timeval *t1, 1226 struct timeval *t2) 1227 { 1228 1229 t1->tv_sec += t2->tv_sec; 1230 if ((t1->tv_usec += t2->tv_usec) >= 1000000) { 1231 t1->tv_sec++; 1232 t1->tv_usec -= 1000000; 1233 } 1234 } 1235 1236 1237 static void 1238 sec_to_timeval(const double sec, struct timeval *tp) 1239 { 1240 tp->tv_sec = sec; 1241 tp->tv_usec = (sec - tp->tv_sec) * 1000000.0; 1242 } 1243 1244 1245 static double 1246 timeval_to_sec(const struct timeval *tp) 1247 { 1248 return tp->tv_sec + tp->tv_usec / 1000000.0; 1249 } 1250 1251 1252 /* 1253 * Print statistics. 1254 * Heavily buffered STDIO is used here, so that all the statistics 1255 * will be written with 1 sys-write call. This is nice when more 1256 * than one copy of the program is running on a terminal; it prevents 1257 * the statistics output from becomming intermingled. 1258 */ 1259 static void 1260 summary(int header) 1261 { 1262 jiggle_flush(1); 1263 1264 if (header) 1265 (void)printf("\n----%s PING Statistics----\n", hostname); 1266 (void)printf("%d packets transmitted, ", ntransmitted); 1267 (void)printf("%d packets received, ", nreceived); 1268 if (nrepeats) 1269 (void)printf("+%d duplicates, ", nrepeats); 1270 if (ntransmitted) { 1271 if (nreceived > ntransmitted) 1272 (void)printf("-- somebody's duplicating packets!"); 1273 else 1274 (void)printf("%.1f%% packet loss", 1275 (((ntransmitted-nreceived)*100.0) / 1276 ntransmitted)); 1277 } 1278 (void)printf("\n"); 1279 if (nreceived && (pingflags & F_TIMING)) { 1280 double n = nreceived + nrepeats; 1281 double avg = (tsum / n); 1282 double variance = 0.0; 1283 if (n>1) 1284 variance = (tsumsq - n*avg*avg) /(n-1); 1285 1286 printf("round-trip min/avg/max/stddev = " 1287 "%.3f/%.3f/%.3f/%.3f ms\n", 1288 tmin * 1000.0, avg * 1000.0, 1289 tmax * 1000.0, sqrt(variance) * 1000.0); 1290 if (pingflags & F_FLOOD) { 1291 double r = diffsec(&last_rx, &first_rx); 1292 double t = diffsec(&last_tx, &first_tx); 1293 if (r == 0) 1294 r = 0.0001; 1295 if (t == 0) 1296 t = 0.0001; 1297 (void)printf(" %.1f packets/sec sent, " 1298 " %.1f packets/sec received\n", 1299 ntransmitted/t, nreceived/r); 1300 } 1301 } 1302 } 1303 1304 1305 /* 1306 * Print statistics when SIGINFO is received. 1307 */ 1308 /* ARGSUSED */ 1309 static void 1310 prtsig(int dummy) 1311 { 1312 summary(0); 1313 #ifdef SIGINFO 1314 (void)signal(SIGINFO, prtsig); 1315 #else 1316 (void)signal(SIGQUIT, prtsig); 1317 #endif 1318 } 1319 1320 1321 /* 1322 * On the first SIGINT, allow any outstanding packets to dribble in 1323 */ 1324 static void 1325 prefinish(int dummy) 1326 { 1327 if (lastrcvd /* quit now if caught up */ 1328 || nreceived == 0) /* or if remote is dead */ 1329 finish(0); 1330 1331 (void)signal(dummy, finish); /* do this only the 1st time */ 1332 1333 if (npackets > ntransmitted) /* let the normal limit work */ 1334 npackets = ntransmitted; 1335 } 1336 1337 1338 /* 1339 * Print statistics and give up. 1340 */ 1341 /* ARGSUSED */ 1342 static void 1343 finish(int dummy) 1344 { 1345 #if defined(SIGINFO) && defined(NOKERNINFO) 1346 struct termios ts; 1347 1348 if (reset_kerninfo && tcgetattr (0, &ts) != -1) { 1349 ts.c_lflag &= ~NOKERNINFO; 1350 tcsetattr (STDIN_FILENO, TCSANOW, &ts); 1351 } 1352 (void)signal(SIGINFO, SIG_IGN); 1353 #else 1354 (void)signal(SIGQUIT, SIG_DFL); 1355 #endif 1356 1357 summary(1); 1358 exit(nreceived > 0 ? 0 : 2); 1359 } 1360 1361 1362 static int /* 0=do not print it */ 1363 ck_pr_icmph(struct icmp *icp, 1364 struct sockaddr_in *from, 1365 int cc, 1366 int override) /* 1=override VERBOSE if interesting */ 1367 { 1368 int hlen; 1369 struct ip ipb, *ip = &ipb; 1370 struct icmp icp2b, *icp2 = &icp2b; 1371 int res; 1372 1373 if (pingflags & F_VERBOSE) { 1374 res = 1; 1375 jiggle_flush(1); 1376 } else { 1377 res = 0; 1378 } 1379 1380 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1381 hlen = ip->ip_hl << 2; 1382 if (ip->ip_p == IPPROTO_ICMP 1383 && hlen + 6 <= cc) { 1384 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1385 if (icp2->icmp_id == ident) { 1386 /* remember to clear route cached in kernel 1387 * if this non-Echo-Reply ICMP message was for one 1388 * of our packets. 1389 */ 1390 clear_cache.tv_sec = 0; 1391 1392 if (!res && override 1393 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1394 jiggle_flush(1); 1395 (void)printf("%d bytes from %s: ", 1396 cc, pr_addr(&from->sin_addr)); 1397 res = 1; 1398 } 1399 } 1400 } 1401 1402 return res; 1403 } 1404 1405 1406 /* 1407 * Print a descriptive string about an ICMP header other than an echo reply. 1408 */ 1409 static int /* 0=printed nothing */ 1410 pr_icmph(struct icmp *icp, 1411 struct sockaddr_in *from, 1412 int cc) 1413 { 1414 switch (icp->icmp_type ) { 1415 case ICMP_UNREACH: 1416 if (!ck_pr_icmph(icp, from, cc, 1)) 1417 return 0; 1418 switch (icp->icmp_code) { 1419 case ICMP_UNREACH_NET: 1420 (void)printf("Destination Net Unreachable"); 1421 break; 1422 case ICMP_UNREACH_HOST: 1423 (void)printf("Destination Host Unreachable"); 1424 break; 1425 case ICMP_UNREACH_PROTOCOL: 1426 (void)printf("Destination Protocol Unreachable"); 1427 break; 1428 case ICMP_UNREACH_PORT: 1429 (void)printf("Destination Port Unreachable"); 1430 break; 1431 case ICMP_UNREACH_NEEDFRAG: 1432 (void)printf("frag needed and DF set. Next MTU=%d", 1433 ntohs(icp->icmp_nextmtu)); 1434 break; 1435 case ICMP_UNREACH_SRCFAIL: 1436 (void)printf("Source Route Failed"); 1437 break; 1438 case ICMP_UNREACH_NET_UNKNOWN: 1439 (void)printf("Unreachable unknown net"); 1440 break; 1441 case ICMP_UNREACH_HOST_UNKNOWN: 1442 (void)printf("Unreachable unknown host"); 1443 break; 1444 case ICMP_UNREACH_ISOLATED: 1445 (void)printf("Unreachable host isolated"); 1446 break; 1447 case ICMP_UNREACH_NET_PROHIB: 1448 (void)printf("Net prohibited access"); 1449 break; 1450 case ICMP_UNREACH_HOST_PROHIB: 1451 (void)printf("Host prohibited access"); 1452 break; 1453 case ICMP_UNREACH_TOSNET: 1454 (void)printf("Bad TOS for net"); 1455 break; 1456 case ICMP_UNREACH_TOSHOST: 1457 (void)printf("Bad TOS for host"); 1458 break; 1459 case 13: 1460 (void)printf("Communication prohibited"); 1461 break; 1462 case 14: 1463 (void)printf("Host precedence violation"); 1464 break; 1465 case 15: 1466 (void)printf("Precedence cutoff"); 1467 break; 1468 default: 1469 (void)printf("Bad Destination Unreachable Code: %d", 1470 icp->icmp_code); 1471 break; 1472 } 1473 /* Print returned IP header information */ 1474 pr_retip(icp, cc); 1475 break; 1476 1477 case ICMP_SOURCEQUENCH: 1478 if (!ck_pr_icmph(icp, from, cc, 1)) 1479 return 0; 1480 (void)printf("Source Quench"); 1481 pr_retip(icp, cc); 1482 break; 1483 1484 case ICMP_REDIRECT: 1485 if (!ck_pr_icmph(icp, from, cc, 1)) 1486 return 0; 1487 switch (icp->icmp_code) { 1488 case ICMP_REDIRECT_NET: 1489 (void)printf("Redirect Network"); 1490 break; 1491 case ICMP_REDIRECT_HOST: 1492 (void)printf("Redirect Host"); 1493 break; 1494 case ICMP_REDIRECT_TOSNET: 1495 (void)printf("Redirect Type of Service and Network"); 1496 break; 1497 case ICMP_REDIRECT_TOSHOST: 1498 (void)printf("Redirect Type of Service and Host"); 1499 break; 1500 default: 1501 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1502 break; 1503 } 1504 (void)printf(" New router addr: %s", 1505 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1506 pr_retip(icp, cc); 1507 break; 1508 1509 case ICMP_ECHO: 1510 if (!ck_pr_icmph(icp, from, cc, 0)) 1511 return 0; 1512 (void)printf("Echo Request: ID=%d seq=%d", 1513 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1514 break; 1515 1516 case ICMP_ECHOREPLY: 1517 /* displaying other's pings is too noisey */ 1518 #if 0 1519 if (!ck_pr_icmph(icp, from, cc, 0)) 1520 return 0; 1521 (void)printf("Echo Reply: ID=%d seq=%d", 1522 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1523 break; 1524 #else 1525 return 0; 1526 #endif 1527 1528 case ICMP_ROUTERADVERT: 1529 if (!ck_pr_icmph(icp, from, cc, 0)) 1530 return 0; 1531 (void)printf("Router Discovery Advert"); 1532 break; 1533 1534 case ICMP_ROUTERSOLICIT: 1535 if (!ck_pr_icmph(icp, from, cc, 0)) 1536 return 0; 1537 (void)printf("Router Discovery Solicit"); 1538 break; 1539 1540 case ICMP_TIMXCEED: 1541 if (!ck_pr_icmph(icp, from, cc, 1)) 1542 return 0; 1543 switch (icp->icmp_code ) { 1544 case ICMP_TIMXCEED_INTRANS: 1545 (void)printf("Time To Live exceeded"); 1546 break; 1547 case ICMP_TIMXCEED_REASS: 1548 (void)printf("Frag reassembly time exceeded"); 1549 break; 1550 default: 1551 (void)printf("Time exceeded, Bad Code: %d", 1552 icp->icmp_code); 1553 break; 1554 } 1555 pr_retip(icp, cc); 1556 break; 1557 1558 case ICMP_PARAMPROB: 1559 if (!ck_pr_icmph(icp, from, cc, 1)) 1560 return 0; 1561 (void)printf("Parameter problem: pointer = 0x%02x", 1562 icp->icmp_hun.ih_pptr); 1563 pr_retip(icp, cc); 1564 break; 1565 1566 case ICMP_TSTAMP: 1567 if (!ck_pr_icmph(icp, from, cc, 0)) 1568 return 0; 1569 (void)printf("Timestamp"); 1570 break; 1571 1572 case ICMP_TSTAMPREPLY: 1573 if (!ck_pr_icmph(icp, from, cc, 0)) 1574 return 0; 1575 (void)printf("Timestamp Reply"); 1576 break; 1577 1578 case ICMP_IREQ: 1579 if (!ck_pr_icmph(icp, from, cc, 0)) 1580 return 0; 1581 (void)printf("Information Request"); 1582 break; 1583 1584 case ICMP_IREQREPLY: 1585 if (!ck_pr_icmph(icp, from, cc, 0)) 1586 return 0; 1587 (void)printf("Information Reply"); 1588 break; 1589 1590 case ICMP_MASKREQ: 1591 if (!ck_pr_icmph(icp, from, cc, 0)) 1592 return 0; 1593 (void)printf("Address Mask Request"); 1594 break; 1595 1596 case ICMP_MASKREPLY: 1597 if (!ck_pr_icmph(icp, from, cc, 0)) 1598 return 0; 1599 (void)printf("Address Mask Reply"); 1600 break; 1601 1602 default: 1603 if (!ck_pr_icmph(icp, from, cc, 0)) 1604 return 0; 1605 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1606 if (pingflags & F_VERBOSE) 1607 pr_iph(icp, cc); 1608 } 1609 1610 return 1; 1611 } 1612 1613 1614 /* 1615 * Print an IP header with options. 1616 */ 1617 static void 1618 pr_iph(struct icmp *icp, 1619 int cc) 1620 { 1621 int hlen; 1622 u_char *cp; 1623 struct ip ipb, *ip = &ipb; 1624 1625 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1626 1627 hlen = ip->ip_hl << 2; 1628 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1629 1630 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1631 (void)printf(" %1x %1x %02x %04x %04x", 1632 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1633 (void)printf(" %1x %04x", 1634 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1635 (void)printf(" %02x %02x %04x", 1636 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1637 (void)printf(" %15s ", 1638 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1639 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1640 /* dump any option bytes */ 1641 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1642 (void)printf("%02x", *cp++); 1643 } 1644 } 1645 1646 /* 1647 * Print an ASCII host address starting from a string of bytes. 1648 */ 1649 static void 1650 pr_saddr(u_char *cp) 1651 { 1652 n_long l; 1653 struct in_addr addr; 1654 1655 l = (u_char)*++cp; 1656 l = (l<<8) + (u_char)*++cp; 1657 l = (l<<8) + (u_char)*++cp; 1658 l = (l<<8) + (u_char)*++cp; 1659 addr.s_addr = htonl(l); 1660 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1661 } 1662 1663 1664 /* 1665 * Return an ASCII host address 1666 * as a dotted quad and optionally with a hostname 1667 */ 1668 static char * 1669 pr_addr(struct in_addr *addr) /* in network order */ 1670 { 1671 struct hostent *hp; 1672 static char buf[MAXHOSTNAMELEN+4+16+1]; 1673 1674 if ((pingflags & F_NUMERIC) 1675 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1676 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1677 } else { 1678 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1679 inet_ntoa(*addr)); 1680 } 1681 1682 return buf; 1683 } 1684 1685 /* 1686 * Dump some info on a returned (via ICMP) IP packet. 1687 */ 1688 static void 1689 pr_retip(struct icmp *icp, 1690 int cc) 1691 { 1692 int hlen; 1693 u_char *cp; 1694 struct ip ipb, *ip = &ipb; 1695 1696 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1697 1698 if (pingflags & F_VERBOSE) 1699 pr_iph(icp, cc); 1700 1701 hlen = ip->ip_hl << 2; 1702 cp = (u_char *) &icp->icmp_data[hlen]; 1703 1704 if (ip->ip_p == IPPROTO_TCP) { 1705 if (pingflags & F_VERBOSE) 1706 (void)printf("\n TCP: from port %u, to port %u", 1707 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1708 } else if (ip->ip_p == IPPROTO_UDP) { 1709 if (pingflags & F_VERBOSE) 1710 (void)printf("\n UDP: from port %u, to port %u", 1711 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1712 } else if (ip->ip_p == IPPROTO_ICMP) { 1713 struct icmp icp2; 1714 (void) memcpy(&icp2, cp, sizeof(icp2)); 1715 if (icp2.icmp_type == ICMP_ECHO) { 1716 if (pingflags & F_VERBOSE) 1717 (void)printf("\n ID=%u icmp_seq=%u", 1718 ntohs((u_int16_t)icp2.icmp_id), 1719 ntohs((u_int16_t)icp2.icmp_seq)); 1720 else 1721 (void)printf(" for icmp_seq=%u", 1722 ntohs((u_int16_t)icp2.icmp_seq)); 1723 } 1724 } 1725 } 1726 1727 static void 1728 fill(void) 1729 { 1730 int i, j, k; 1731 char *cp; 1732 int pat[16]; 1733 1734 for (cp = fill_pat; *cp != '\0'; cp++) { 1735 if (!isxdigit((unsigned char)*cp)) 1736 break; 1737 } 1738 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1739 (void)fflush(stdout); 1740 errx(1, "\"-p %s\": patterns must be specified with" 1741 " 1-32 hex digits\n", 1742 fill_pat); 1743 } 1744 1745 i = sscanf(fill_pat, 1746 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1747 &pat[0], &pat[1], &pat[2], &pat[3], 1748 &pat[4], &pat[5], &pat[6], &pat[7], 1749 &pat[8], &pat[9], &pat[10], &pat[11], 1750 &pat[12], &pat[13], &pat[14], &pat[15]); 1751 1752 for (k=PHDR_LEN, j = 0; k <= datalen; k++) { 1753 opack_icmp.icmp_data[k] = pat[j]; 1754 if (++j >= i) 1755 j = 0; 1756 } 1757 1758 if (!(pingflags & F_QUIET)) { 1759 (void)printf("PATTERN: 0x"); 1760 for (j=0; j<i; j++) 1761 (void)printf("%02x", 1762 (u_char)opack_icmp.icmp_data[PHDR_LEN+j]); 1763 (void)printf("\n"); 1764 } 1765 1766 } 1767 1768 1769 static void 1770 rnd_fill(void) 1771 { 1772 static u_int32_t rnd; 1773 int i; 1774 1775 for (i = PHDR_LEN; i < datalen; i++) { 1776 rnd = (3141592621U * rnd + 663896637U); 1777 opack_icmp.icmp_data[i] = rnd>>24; 1778 } 1779 } 1780 1781 1782 static void 1783 gethost(const char *arg, 1784 const char *name, 1785 struct sockaddr_in *sa, 1786 char *realname, 1787 int realname_len) 1788 { 1789 struct hostent *hp; 1790 1791 (void)memset(sa, 0, sizeof(*sa)); 1792 sa->sin_family = AF_INET; 1793 1794 /* If it is an IP address, try to convert it to a name to 1795 * have something nice to display. 1796 */ 1797 if (inet_aton(name, &sa->sin_addr) != 0) { 1798 if (realname) { 1799 if (pingflags & F_NUMERIC) 1800 hp = 0; 1801 else 1802 hp = gethostbyaddr((char *)&sa->sin_addr, 1803 sizeof(sa->sin_addr), 1804 AF_INET); 1805 (void)strncpy(realname, hp ? hp->h_name : name, 1806 realname_len); 1807 realname[realname_len-1] = '\0'; 1808 } 1809 return; 1810 } 1811 1812 hp = gethostbyname(name); 1813 if (!hp) 1814 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1815 1816 if (hp->h_addrtype != AF_INET) 1817 errx(1, "%s only supported with IP", arg); 1818 1819 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1820 1821 if (realname) { 1822 (void)strncpy(realname, hp->h_name, realname_len); 1823 realname[realname_len-1] = '\0'; 1824 } 1825 } 1826 1827 1828 static void 1829 usage(void) 1830 { 1831 #ifdef IPSEC 1832 #ifdef IPSEC_POLICY_IPSEC 1833 #define IPSECOPT "\n [-E policy] " 1834 #else 1835 #define IPSECOPT "\n [-AE] " 1836 #endif /*IPSEC_POLICY_IPSEC*/ 1837 #else 1838 #define IPSECOPT "" 1839 #endif /*IPSEC*/ 1840 1841 (void)fprintf(stderr, "Usage: \n" 1842 "%s [-adDfLnoPqQrRv] [-c count] [-g gateway] [-h host]" 1843 " [-i interval] [-I addr]\n" 1844 " [-l preload] [-p pattern] [-s size] [-t tos] [-T ttl]" 1845 " [-w maxwait] " IPSECOPT "host\n", 1846 getprogname()); 1847 exit(1); 1848 } 1849
Indexes created Tue Sep 30 20:09:53 GMT 2025