ping.c revision 1.110
1 /* $NetBSD: ping.c,v 1.110 2016/07/31 17:59:08 dholland Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Muuss. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * P I N G . C 37 * 38 * Using the InterNet Control Message Protocol (ICMP) "ECHO" facility, 39 * measure round-trip-delays and packet loss across network paths. 40 * 41 * Author - 42 * Mike Muuss 43 * U. S. Army Ballistic Research Laboratory 44 * December, 1983 45 * Modified at Uc Berkeley 46 * Record Route and verbose headers - Phil Dykstra, BRL, March 1988. 47 * Multicast options (ttl, if, loop) - Steve Deering, Stanford, August 1988. 48 * ttl, duplicate detection - Cliff Frost, UCB, April 1989 49 * Pad pattern - Cliff Frost (from Tom Ferrin, UCSF), April 1989 50 * 51 * Status - 52 * Public Domain. Distribution Unlimited. 53 * 54 * Bugs - 55 * More statistics could always be gathered. 56 * This program has to run SUID to ROOT to access the ICMP socket. 57 */ 58 59 #include <sys/cdefs.h> 60 #ifndef lint 61 __RCSID("$NetBSD: ping.c,v 1.110 2016/07/31 17:59:08 dholland Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <signal.h> 68 #include <sys/time.h> 69 #include <sys/types.h> 70 #include <sys/param.h> 71 #include <sys/socket.h> 72 #include <sys/file.h> 73 #include <termios.h> 74 #include <stdlib.h> 75 #include <unistd.h> 76 #include <poll.h> 77 #include <limits.h> 78 #include <math.h> 79 #include <string.h> 80 #include <err.h> 81 82 #include <netinet/in_systm.h> 83 #include <netinet/in.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_icmp.h> 86 #include <netinet/ip_var.h> 87 #include <arpa/inet.h> 88 #include <ctype.h> 89 #include <netdb.h> 90 91 #ifdef IPSEC 92 #include <netipsec/ipsec.h> 93 #endif /*IPSEC*/ 94 95 #include "prog_ops.h" 96 97 #define FLOOD_INTVL 0.01 /* default flood output interval */ 98 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 99 100 #define F_VERBOSE 0x0001 101 #define F_QUIET 0x0002 /* minimize all output */ 102 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 103 #define F_FLOOD 0x0008 /* flood-ping */ 104 #define F_RECORD_ROUTE 0x0010 /* record route */ 105 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 106 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 107 #define F_PING_RANDOM 0x0080 /* use random data */ 108 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 109 #define F_TIMING 0x0200 /* room for a timestamp */ 110 #define F_DF 0x0400 /* set IP DF bit */ 111 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 112 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 113 #define F_MCAST 0x2000 /* multicast target */ 114 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 115 #define F_AUDIBLE 0x8000 /* audible output */ 116 #define F_TIMING64 0x10000 /* 64 bit time, nanoseconds */ 117 #ifdef IPSEC 118 #ifdef IPSEC_POLICY_IPSEC 119 #define F_POLICY 0x20000 120 #else 121 #define F_AUTHHDR 0x20000 122 #define F_ENCRYPT 0x40000 123 #endif /*IPSEC_POLICY_IPSEC*/ 124 #endif /*IPSEC*/ 125 126 127 /* MAX_DUP_CHK is the number of bits in received table, the 128 * maximum number of received sequence numbers we can track to check 129 * for duplicates. 130 */ 131 #define MAX_DUP_CHK (8 * 2048) 132 static u_char rcvd_tbl[MAX_DUP_CHK/8]; 133 static int nrepeats = 0; 134 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 135 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 136 #define SET(seq) (A(seq) |= B(seq)) 137 #define CLR(seq) (A(seq) &= (~B(seq))) 138 #define TST(seq) (A(seq) & B(seq)) 139 140 struct tv32 { 141 int32_t tv32_sec; 142 int32_t tv32_usec; 143 }; 144 145 146 static u_char *packet; 147 static int packlen; 148 static int pingflags = 0, options; 149 static int pongflags = 0; 150 static char *fill_pat; 151 152 static int s; /* Socket file descriptor */ 153 static int sloop; /* Socket file descriptor/loopback */ 154 155 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 156 #define PHDR64_LEN sizeof(struct timespec) /* size of timestamp header */ 157 static struct sockaddr_in whereto, send_addr; /* Who to ping */ 158 static struct sockaddr_in src_addr; /* from where */ 159 static struct sockaddr_in loc_addr; /* 127.1 */ 160 static int datalen; /* How much data */ 161 static int phdrlen; 162 163 #ifndef __NetBSD__ 164 static char *progname; 165 #define getprogname() (progname) 166 #define setprogname(name) ((void)(progname = (name))) 167 #endif 168 169 static char hostname[MAXHOSTNAMELEN]; 170 171 static struct { 172 struct ip o_ip; 173 char o_opt[MAX_IPOPTLEN]; 174 union { 175 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 176 struct icmp u_icmp; 177 } o_u; 178 } out_pack; 179 #define opack_icmp out_pack.o_u.u_icmp 180 static struct ip *opack_ip; 181 182 static char optspace[MAX_IPOPTLEN]; /* record route space */ 183 static int optlen; 184 185 static int npackets; /* total packets to send */ 186 static int preload; /* number of packets to "preload" */ 187 static int ntransmitted; /* output sequence # = #sent */ 188 static int ident; /* our ID, in network byte order */ 189 190 static int nreceived; /* # of packets we got back */ 191 192 static double interval; /* interval between packets */ 193 static struct timespec interval_tv; 194 static double tmin = 999999999.0; 195 static double tmax = 0.0; 196 static double tsum = 0.0; /* sum of all times */ 197 static double tsumsq = 0.0; 198 static double maxwait = 0.0; 199 200 static int bufspace = IP_MAXPACKET; 201 202 static struct timespec now, clear_cache, last_tx, next_tx, first_tx; 203 static struct timespec last_rx, first_rx; 204 static int lastrcvd = 1; /* last ping sent has been received */ 205 206 static struct timespec jiggle_time; 207 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 208 209 __dead static void doit(void); 210 static void prefinish(int); 211 static void prtsig(int); 212 __dead static void finish(int); 213 static void summary(int); 214 static void pinger(void); 215 static void fill(void); 216 static void rnd_fill(void); 217 static double diffsec(struct timespec *, struct timespec *); 218 #if 0 219 static void timespecadd(struct timespec *, struct timespec *); 220 #endif 221 static void sec_to_timespec(const double, struct timespec *); 222 static double timespec_to_sec(const struct timespec *); 223 static void pr_pack(u_char *, int, struct sockaddr_in *); 224 static u_int16_t in_cksum(u_int16_t *, u_int); 225 static void pr_saddr(u_char *); 226 static char *pr_addr(struct in_addr *); 227 static void pr_iph(struct icmp *, int); 228 static void pr_retip(struct icmp *, int); 229 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 230 static void jiggle(int), jiggle_flush(int); 231 static void gethost(const char *, const char *, 232 struct sockaddr_in *, char *, int); 233 __dead static void usage(void); 234 235 int 236 main(int argc, char *argv[]) 237 { 238 int c, i, on = 1, hostind = 0; 239 long l; 240 int len = -1, compat = 0; 241 u_char ttl = 0; 242 u_long tos = 0; 243 char *p; 244 #ifdef IPSEC 245 #ifdef IPSEC_POLICY_IPSEC 246 char *policy_in = NULL; 247 char *policy_out = NULL; 248 #endif 249 #endif 250 #ifdef SIGINFO 251 struct sigaction sa; 252 #endif 253 254 if (prog_init && prog_init() == -1) 255 err(EXIT_FAILURE, "init failed"); 256 257 if ((s = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 258 err(EXIT_FAILURE, "Cannot create socket"); 259 if ((sloop = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 260 err(EXIT_FAILURE, "Cannot create socket"); 261 262 /* 263 * sloop is never read on. This prevents packets from 264 * queueing in its recv buffer. 265 */ 266 if (prog_shutdown(sloop, SHUT_RD) == -1) 267 warn("Cannot shutdown for read"); 268 269 if (prog_setuid(prog_getuid()) == -1) 270 err(EXIT_FAILURE, "setuid"); 271 272 setprogname(argv[0]); 273 274 #ifndef IPSEC 275 #define IPSECOPT 276 #else 277 #ifdef IPSEC_POLICY_IPSEC 278 #define IPSECOPT "E:" 279 #else 280 #define IPSECOPT "AE" 281 #endif /*IPSEC_POLICY_IPSEC*/ 282 #endif 283 while ((c = getopt(argc, argv, 284 "ac:CdDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 285 #undef IPSECOPT 286 switch (c) { 287 case 'a': 288 pingflags |= F_AUDIBLE; 289 break; 290 case 'C': 291 compat = 1; 292 break; 293 case 'c': 294 npackets = strtol(optarg, &p, 0); 295 if (*p != '\0' || npackets <= 0) 296 errx(EXIT_FAILURE, 297 "Bad/invalid number of packets: %s", 298 optarg); 299 break; 300 case 'D': 301 pingflags |= F_DF; 302 break; 303 case 'd': 304 options |= SO_DEBUG; 305 break; 306 case 'f': 307 pingflags |= F_FLOOD; 308 break; 309 case 'h': 310 hostind = optind-1; 311 break; 312 case 'i': /* wait between sending packets */ 313 interval = strtod(optarg, &p); 314 if (*p != '\0' || interval <= 0) 315 errx(EXIT_FAILURE, "Bad/invalid interval: %s", 316 optarg); 317 break; 318 case 'l': 319 preload = strtol(optarg, &p, 0); 320 if (*p != '\0' || preload < 0) 321 errx(EXIT_FAILURE, "Bad/invalid preload value: " 322 "%s", optarg); 323 break; 324 case 'n': 325 pingflags |= F_NUMERIC; 326 break; 327 case 'o': 328 pingflags |= F_ONCE; 329 break; 330 case 'p': /* fill buffer with user pattern */ 331 if (pingflags & F_PING_RANDOM) 332 errx(EXIT_FAILURE, 333 "Only one of -P and -p allowed"); 334 pingflags |= F_PING_FILLED; 335 fill_pat = optarg; 336 break; 337 case 'P': 338 if (pingflags & F_PING_FILLED) 339 errx(EXIT_FAILURE, 340 "Only one of -P and -p allowed"); 341 pingflags |= F_PING_RANDOM; 342 break; 343 case 'q': 344 pingflags |= F_QUIET; 345 break; 346 case 'Q': 347 pingflags |= F_SEMI_QUIET; 348 break; 349 case 'r': 350 options |= SO_DONTROUTE; 351 break; 352 case 's': /* size of packet to send */ 353 l = strtol(optarg, &p, 0); 354 if (*p != '\0' || l < 0) 355 errx(EXIT_FAILURE, 356 "Bad/invalid packet size: %s", optarg); 357 if (l > MAXPACKET) 358 errx(EXIT_FAILURE, "packet size is too large"); 359 len = (int)l; 360 break; 361 case 'v': 362 pingflags |= F_VERBOSE; 363 break; 364 case 'R': 365 pingflags |= F_RECORD_ROUTE; 366 break; 367 case 'L': 368 pingflags |= F_MCAST_NOLOOP; 369 break; 370 case 't': 371 tos = strtoul(optarg, &p, 0); 372 if (*p != '\0' || tos > 0xFF) 373 errx(EXIT_FAILURE, "bad tos value: %s", optarg); 374 break; 375 case 'T': 376 l = strtol(optarg, &p, 0); 377 if (*p != '\0' || l > 255 || l <= 0) 378 errx(EXIT_FAILURE, "ttl out of range: %s", 379 optarg); 380 ttl = (u_char)l; /* cannot check >255 otherwise */ 381 break; 382 case 'I': 383 pingflags |= F_SOURCE_ADDR; 384 gethost("-I", optarg, &src_addr, 0, 0); 385 break; 386 case 'g': 387 pingflags |= F_SOURCE_ROUTE; 388 gethost("-g", optarg, &send_addr, 0, 0); 389 break; 390 case 'w': 391 maxwait = strtod(optarg, &p); 392 if (*p != '\0' || maxwait <= 0) 393 errx(EXIT_FAILURE, "Bad/invalid maxwait time: " 394 "%s", optarg); 395 break; 396 #ifdef IPSEC 397 #ifdef IPSEC_POLICY_IPSEC 398 case 'E': 399 pingflags |= F_POLICY; 400 if (!strncmp("in", optarg, 2)) { 401 policy_in = strdup(optarg); 402 if (!policy_in) 403 err(EXIT_FAILURE, "strdup"); 404 } else if (!strncmp("out", optarg, 3)) { 405 policy_out = strdup(optarg); 406 if (!policy_out) 407 err(EXIT_FAILURE, "strdup"); 408 } else 409 errx(EXIT_FAILURE, "invalid security policy: " 410 "%s", optarg); 411 break; 412 #else 413 case 'A': 414 pingflags |= F_AUTHHDR; 415 break; 416 case 'E': 417 pingflags |= F_ENCRYPT; 418 break; 419 #endif /*IPSEC_POLICY_IPSEC*/ 420 #endif /*IPSEC*/ 421 default: 422 usage(); 423 break; 424 } 425 } 426 427 if (interval == 0) 428 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 429 #ifndef sgi 430 if (pingflags & F_FLOOD && prog_getuid()) 431 errx(EXIT_FAILURE, "Must be superuser to use -f"); 432 if (interval < 1.0 && prog_getuid()) 433 errx(EXIT_FAILURE, "Must be superuser to use < 1 sec " 434 "ping interval"); 435 if (preload > 0 && prog_getuid()) 436 errx(EXIT_FAILURE, "Must be superuser to use -l"); 437 #endif 438 sec_to_timespec(interval, &interval_tv); 439 440 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 441 warnx("Sorry, no audible output for flood pings"); 442 443 if (npackets != 0) { 444 npackets += preload; 445 } else { 446 npackets = INT_MAX; 447 } 448 449 if (hostind == 0) { 450 if (optind != argc-1) 451 usage(); 452 else 453 hostind = optind; 454 } 455 else if (hostind >= argc - 1) 456 usage(); 457 458 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 459 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 460 pingflags |= F_MCAST; 461 if (!(pingflags & F_SOURCE_ROUTE)) 462 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 463 464 loc_addr.sin_family = AF_INET; 465 loc_addr.sin_len = sizeof(struct sockaddr_in); 466 loc_addr.sin_addr.s_addr = htonl((127 << 24) + 1); 467 468 if (len != -1) 469 datalen = len; 470 else 471 datalen = 64 - PHDR_LEN; 472 if (!compat && datalen >= (int)PHDR64_LEN) { /* can we time them? */ 473 pingflags |= F_TIMING64; 474 phdrlen = PHDR64_LEN; 475 } else if (datalen >= (int)PHDR_LEN) { /* can we time them? */ 476 pingflags |= F_TIMING; 477 phdrlen = PHDR_LEN; 478 } else 479 phdrlen = 0; 480 481 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 482 if ((packet = malloc(packlen)) == NULL) 483 err(EXIT_FAILURE, "Can't allocate %d bytes", packlen); 484 485 if (pingflags & F_PING_FILLED) { 486 fill(); 487 } else if (pingflags & F_PING_RANDOM) { 488 rnd_fill(); 489 } else { 490 for (i = phdrlen; i < datalen; i++) 491 opack_icmp.icmp_data[i] = i; 492 } 493 494 ident = arc4random() & 0xFFFF; 495 496 if (options & SO_DEBUG) { 497 if (prog_setsockopt(s, SOL_SOCKET, SO_DEBUG, 498 (char *)&on, sizeof(on)) == -1) 499 warn("Can't turn on socket debugging"); 500 } 501 if (options & SO_DONTROUTE) { 502 if (prog_setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 503 (char *)&on, sizeof(on)) == -1) 504 warn("SO_DONTROUTE"); 505 } 506 507 if (options & SO_DEBUG) { 508 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 509 (char *)&on, sizeof(on)) == -1) 510 warn("Can't turn on socket debugging"); 511 } 512 if (options & SO_DONTROUTE) { 513 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 514 (char *)&on, sizeof(on)) == -1) 515 warn("SO_DONTROUTE"); 516 } 517 518 if (pingflags & F_SOURCE_ROUTE) { 519 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 520 optspace[IPOPT_OLEN] = optlen = 7; 521 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 522 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 523 sizeof(whereto.sin_addr)); 524 optspace[optlen++] = IPOPT_NOP; 525 } 526 if (pingflags & F_RECORD_ROUTE) { 527 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 528 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 529 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 530 optlen = MAX_IPOPTLEN; 531 } 532 /* this leaves opack_ip 0(mod 4) aligned */ 533 opack_ip = (struct ip *)((char *)&out_pack.o_ip 534 + sizeof(out_pack.o_opt) 535 - optlen); 536 (void) memcpy(opack_ip + 1, optspace, optlen); 537 538 if (prog_setsockopt(s, IPPROTO_IP, IP_HDRINCL, 539 (char *) &on, sizeof(on)) < 0) 540 err(EXIT_FAILURE, "Can't set special IP header"); 541 542 opack_ip->ip_v = IPVERSION; 543 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 544 opack_ip->ip_tos = tos; 545 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 546 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 547 opack_ip->ip_p = IPPROTO_ICMP; 548 opack_ip->ip_src = src_addr.sin_addr; 549 opack_ip->ip_dst = send_addr.sin_addr; 550 551 if (pingflags & F_MCAST) { 552 if (pingflags & F_MCAST_NOLOOP) { 553 u_char loop = 0; 554 if (prog_setsockopt(s, IPPROTO_IP, 555 IP_MULTICAST_LOOP, 556 (char *) &loop, 1) < 0) 557 err(EXIT_FAILURE, "Can't disable multicast loopback"); 558 } 559 560 if (ttl != 0 561 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 562 (char *) &ttl, 1) < 0) 563 err(EXIT_FAILURE, "Can't set multicast time-to-live"); 564 565 if ((pingflags & F_SOURCE_ADDR) 566 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 567 (char *) &src_addr.sin_addr, 568 sizeof(src_addr.sin_addr)) < 0) 569 err(EXIT_FAILURE, "Can't set multicast source interface"); 570 571 } else if (pingflags & F_SOURCE_ADDR) { 572 if (prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 573 (char *) &src_addr.sin_addr, 574 sizeof(src_addr.sin_addr)) < 0) 575 err(EXIT_FAILURE, "Can't set source interface/address"); 576 } 577 #ifdef IPSEC 578 #ifdef IPSEC_POLICY_IPSEC 579 { 580 char *buf; 581 if (pingflags & F_POLICY) { 582 if (policy_in != NULL) { 583 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 584 if (buf == NULL) 585 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 586 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 587 buf, ipsec_get_policylen(buf)) < 0) { 588 err(EXIT_FAILURE, "ipsec policy cannot be " 589 "configured"); 590 } 591 free(buf); 592 } 593 if (policy_out != NULL) { 594 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 595 if (buf == NULL) 596 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 597 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 598 buf, ipsec_get_policylen(buf)) < 0) { 599 err(EXIT_FAILURE, "ipsec policy cannot be " 600 "configured"); 601 } 602 free(buf); 603 } 604 } 605 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 606 if (buf == NULL) 607 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 608 if (prog_setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 609 buf, ipsec_get_policylen(buf)) < 0) { 610 #if 0 611 warnx("ipsec is not configured"); 612 #else 613 /* ignore it, should be okay */ 614 #endif 615 } 616 free(buf); 617 } 618 #else 619 { 620 int optval; 621 if (pingflags & F_AUTHHDR) { 622 optval = IPSEC_LEVEL_REQUIRE; 623 #ifdef IP_AUTH_TRANS_LEVEL 624 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 625 (char *)&optval, sizeof(optval)); 626 #else 627 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 628 (char *)&optval, sizeof(optval)); 629 #endif 630 } 631 if (pingflags & F_ENCRYPT) { 632 optval = IPSEC_LEVEL_REQUIRE; 633 (void)prog_setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 634 (char *)&optval, sizeof(optval)); 635 } 636 optval = IPSEC_LEVEL_BYPASS; 637 #ifdef IP_AUTH_TRANS_LEVEL 638 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 639 (char *)&optval, sizeof(optval)); 640 #else 641 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 642 (char *)&optval, sizeof(optval)); 643 #endif 644 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 645 (char *)&optval, sizeof(optval)); 646 } 647 #endif /*IPSEC_POLICY_IPSEC*/ 648 #endif /*IPSEC*/ 649 650 (void)printf("PING %s (%s): %d data bytes\n", hostname, 651 inet_ntoa(whereto.sin_addr), datalen); 652 653 /* When pinging the broadcast address, you can get a lot 654 * of answers. Doing something so evil is useful if you 655 * are trying to stress the ethernet, or just want to 656 * fill the arp cache to get some stuff for /etc/ethers. 657 */ 658 while (0 > prog_setsockopt(s, SOL_SOCKET, SO_RCVBUF, 659 (char*)&bufspace, sizeof(bufspace))) { 660 if ((bufspace -= 4096) <= 0) 661 err(EXIT_FAILURE, "Cannot set the receive buffer size"); 662 } 663 664 /* make it possible to send giant probes, but do not worry now 665 * if it fails, since we probably won't send giant probes. 666 */ 667 (void)prog_setsockopt(s, SOL_SOCKET, SO_SNDBUF, 668 (char*)&bufspace, sizeof(bufspace)); 669 670 (void)signal(SIGINT, prefinish); 671 672 #ifdef SIGINFO 673 sa.sa_handler = prtsig; 674 sa.sa_flags = SA_NOKERNINFO; 675 sigemptyset(&sa.sa_mask); 676 (void)sigaction(SIGINFO, &sa, NULL); 677 #else 678 (void)signal(SIGQUIT, prtsig); 679 #endif 680 (void)signal(SIGCONT, prtsig); 681 682 /* fire off them quickies */ 683 for (i = 0; i < preload; i++) { 684 clock_gettime(CLOCK_MONOTONIC, &now); 685 pinger(); 686 } 687 688 doit(); 689 return 0; 690 } 691 692 693 static void 694 doit(void) 695 { 696 int cc; 697 struct sockaddr_in from; 698 socklen_t fromlen; 699 double sec, last, d_last; 700 struct pollfd fdmaskp[1]; 701 702 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 703 if (maxwait != 0) { 704 last = timespec_to_sec(&clear_cache) + maxwait; 705 d_last = 0; 706 } else { 707 last = 0; 708 d_last = 365*24*60*60; 709 } 710 711 do { 712 clock_gettime(CLOCK_MONOTONIC, &now); 713 714 if (last != 0) 715 d_last = last - timespec_to_sec(&now); 716 717 if (ntransmitted < npackets && d_last > 0) { 718 /* send if within 100 usec or late for next packet */ 719 sec = diffsec(&next_tx, &now); 720 if (sec <= 0.0001 || 721 (lastrcvd && (pingflags & F_FLOOD))) { 722 pinger(); 723 sec = diffsec(&next_tx, &now); 724 } 725 if (sec < 0.0) 726 sec = 0.0; 727 if (d_last < sec) 728 sec = d_last; 729 730 } else { 731 /* For the last response, wait twice as long as the 732 * worst case seen, or 10 times as long as the 733 * maximum interpacket interval, whichever is longer. 734 */ 735 sec = MAX(2 * tmax, 10 * interval) - 736 diffsec(&now, &last_tx); 737 if (d_last < sec) 738 sec = d_last; 739 if (sec <= 0) 740 break; 741 } 742 743 fdmaskp[0].fd = s; 744 fdmaskp[0].events = POLLIN; 745 cc = prog_poll(fdmaskp, 1, (int)(sec * 1000)); 746 if (cc <= 0) { 747 if (cc < 0) { 748 if (errno == EINTR) 749 continue; 750 jiggle_flush(1); 751 err(EXIT_FAILURE, "poll"); 752 } 753 continue; 754 } 755 756 fromlen = sizeof(from); 757 cc = prog_recvfrom(s, (char *) packet, packlen, 758 0, (struct sockaddr *)&from, 759 &fromlen); 760 if (cc < 0) { 761 if (errno != EINTR) { 762 jiggle_flush(1); 763 warn("recvfrom"); 764 (void)fflush(stderr); 765 } 766 continue; 767 } 768 clock_gettime(CLOCK_MONOTONIC, &now); 769 pr_pack(packet, cc, &from); 770 771 } while (nreceived < npackets 772 && (nreceived == 0 || !(pingflags & F_ONCE))); 773 774 finish(0); 775 } 776 777 778 static void 779 jiggle_flush(int nl) /* new line if there are dots */ 780 { 781 int serrno = errno; 782 783 if (jiggle_cnt > 0) { 784 total_jiggled += jiggle_cnt; 785 jiggle_direction = 1; 786 do { 787 (void)putchar('.'); 788 } while (--jiggle_cnt > 0); 789 790 } else if (jiggle_cnt < 0) { 791 total_jiggled -= jiggle_cnt; 792 jiggle_direction = -1; 793 do { 794 (void)putchar('\b'); 795 } while (++jiggle_cnt < 0); 796 } 797 798 if (nl) { 799 if (total_jiggled != 0) 800 (void)putchar('\n'); 801 total_jiggled = 0; 802 jiggle_direction = -1; 803 } 804 805 (void)fflush(stdout); 806 (void)fflush(stderr); 807 jiggle_time = now; 808 errno = serrno; 809 } 810 811 812 /* jiggle the cursor for flood-ping 813 */ 814 static void 815 jiggle(int delta) 816 { 817 double dt; 818 819 if (pingflags & F_QUIET) 820 return; 821 822 /* do not back up into messages */ 823 if (total_jiggled+jiggle_cnt+delta < 0) 824 return; 825 826 jiggle_cnt += delta; 827 828 /* flush the FLOOD dots when things are quiet 829 * or occassionally to make the cursor jiggle. 830 */ 831 dt = diffsec(&last_tx, &jiggle_time); 832 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 833 jiggle_flush(0); 834 } 835 836 837 /* 838 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 839 * will be added on by the kernel. The ID field is our UNIX process ID, 840 * and the sequence number is an ascending integer. The first phdrlen bytes 841 * of the data portion are used to hold a UNIX "timeval" struct in VAX 842 * byte-order, to compute the round-trip time, or a UNIX "timespec" in native 843 * format. 844 */ 845 static void 846 pinger(void) 847 { 848 struct tv32 tv32; 849 int i, cc, sw; 850 851 opack_icmp.icmp_code = 0; 852 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 853 854 /* clear the cached route in the kernel after an ICMP 855 * response such as a Redirect is seen to stop causing 856 * more such packets. Also clear the cached route 857 * periodically in case of routing changes that make 858 * black holes come and go. 859 */ 860 if (clear_cache.tv_sec != now.tv_sec) { 861 opack_icmp.icmp_type = ICMP_ECHOREPLY; 862 opack_icmp.icmp_id = ~ident; 863 opack_icmp.icmp_cksum = 0; 864 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 865 phdrlen); 866 sw = 0; 867 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 868 (char *)&sw, sizeof(sw)) < 0) 869 err(EXIT_FAILURE, "Can't turn off special IP header"); 870 if (prog_sendto(sloop, (char *) &opack_icmp, 871 ICMP_MINLEN, MSG_DONTROUTE, 872 (struct sockaddr *)&loc_addr, 873 sizeof(struct sockaddr_in)) < 0) { 874 /* 875 * XXX: we only report this as a warning in verbose 876 * mode because people get confused when they see 877 * this error when they are running in single user 878 * mode and they have not configured lo0 879 */ 880 if (pingflags & F_VERBOSE) 881 warn("failed to clear cached route"); 882 } 883 sw = 1; 884 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 885 (char *)&sw, sizeof(sw)) < 0) 886 err(EXIT_FAILURE, "Can't set special IP header"); 887 888 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 889 } 890 891 opack_icmp.icmp_type = ICMP_ECHO; 892 opack_icmp.icmp_id = ident; 893 894 if (pingflags & F_TIMING) { 895 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 896 tv32.tv32_usec = htonl(now.tv_nsec / 1000); 897 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 898 } else if (pingflags & F_TIMING64) 899 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 900 901 cc = MAX(datalen, ICMP_MINLEN) + PHDR_LEN; 902 opack_icmp.icmp_cksum = 0; 903 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 904 905 cc += opack_ip->ip_hl<<2; 906 opack_ip->ip_len = cc; 907 i = prog_sendto(s, (char *) opack_ip, cc, 0, 908 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 909 if (i != cc) { 910 jiggle_flush(1); 911 if (i < 0) 912 warn("sendto"); 913 else 914 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 915 (void)fflush(stderr); 916 } 917 lastrcvd = 0; 918 919 CLR(ntransmitted); 920 ntransmitted++; 921 922 last_tx = now; 923 if (next_tx.tv_sec == 0) { 924 first_tx = now; 925 next_tx = now; 926 } 927 928 /* Transmit regularly, at always the same microsecond in the 929 * second when going at one packet per second. 930 * If we are at most 100 ms behind, send extras to get caught up. 931 * Otherwise, skip packets we were too slow to send. 932 */ 933 if (diffsec(&next_tx, &now) <= interval) { 934 do { 935 timespecadd(&next_tx, &interval_tv, &next_tx); 936 } while (diffsec(&next_tx, &now) < -0.1); 937 } 938 939 if (pingflags & F_FLOOD) 940 jiggle(1); 941 942 /* While the packet is going out, ready buffer for the next 943 * packet. Use a fast but not very good random number generator. 944 */ 945 if (pingflags & F_PING_RANDOM) 946 rnd_fill(); 947 } 948 949 950 static void 951 pr_pack_sub(int cc, 952 char *addr, 953 int seqno, 954 int dupflag, 955 int ttl, 956 double triptime) 957 { 958 jiggle_flush(1); 959 960 if (pingflags & F_FLOOD) 961 return; 962 963 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 964 if (dupflag) 965 (void)printf(" DUP!"); 966 (void)printf(" ttl=%d", ttl); 967 if (pingflags & (F_TIMING|F_TIMING64)) { 968 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 969 970 (void)printf(" time=%.*f ms", prec, triptime*1000.0); 971 } 972 973 /* 974 * Send beep to stderr, since that's more likely than stdout 975 * to go to a terminal.. 976 */ 977 if (pingflags & F_AUDIBLE && !dupflag) 978 (void)fprintf(stderr,"\a"); 979 } 980 981 982 /* 983 * Print out the packet, if it came from us. This logic is necessary 984 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 985 * which arrive ('tis only fair). This permits multiple copies of this 986 * program to be run without having intermingled output (or statistics!). 987 */ 988 static void 989 pr_pack(u_char *buf, 990 int tot_len, 991 struct sockaddr_in *from) 992 { 993 struct ip *ip; 994 struct icmp *icp; 995 int i, j, net_len; 996 u_char *cp; 997 static int old_rrlen; 998 static char old_rr[MAX_IPOPTLEN]; 999 int hlen, dupflag = 0, dumped; 1000 double triptime = 0.0; 1001 #define PR_PACK_SUB() {if (!dumped) { \ 1002 dumped = 1; \ 1003 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 1004 ntohs((u_int16_t)icp->icmp_seq), \ 1005 dupflag, ip->ip_ttl, triptime);}} 1006 1007 /* Check the IP header */ 1008 ip = (struct ip *) buf; 1009 hlen = ip->ip_hl << 2; 1010 if (tot_len < hlen + ICMP_MINLEN) { 1011 if (pingflags & F_VERBOSE) { 1012 jiggle_flush(1); 1013 (void)printf("packet too short (%d bytes) from %s\n", 1014 tot_len, inet_ntoa(from->sin_addr)); 1015 } 1016 return; 1017 } 1018 1019 /* Now the ICMP part */ 1020 dumped = 0; 1021 net_len = tot_len - hlen; 1022 icp = (struct icmp *)(buf + hlen); 1023 if (icp->icmp_type == ICMP_ECHOREPLY 1024 && icp->icmp_id == ident) { 1025 1026 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 1027 lastrcvd = 1; 1028 last_rx = now; 1029 if (first_rx.tv_sec == 0) 1030 first_rx = last_rx; 1031 nreceived++; 1032 if (pingflags & (F_TIMING|F_TIMING64)) { 1033 struct timespec tv; 1034 1035 if (pingflags & F_TIMING) { 1036 struct tv32 tv32; 1037 1038 (void)memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1039 tv.tv_sec = (uint32_t)ntohl(tv32.tv32_sec); 1040 tv.tv_nsec = ntohl(tv32.tv32_usec) * 1000; 1041 } else if (pingflags & F_TIMING64) 1042 (void)memcpy(&tv, icp->icmp_data, sizeof(tv)); 1043 else 1044 memset(&tv, 0, sizeof(tv)); /* XXX: gcc */ 1045 1046 triptime = diffsec(&last_rx, &tv); 1047 tsum += triptime; 1048 tsumsq += triptime * triptime; 1049 if (triptime < tmin) 1050 tmin = triptime; 1051 if (triptime > tmax) 1052 tmax = triptime; 1053 } 1054 1055 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1056 nrepeats++, nreceived--; 1057 dupflag=1; 1058 } else { 1059 SET(ntohs((u_int16_t)icp->icmp_seq)); 1060 } 1061 1062 if (tot_len != opack_ip->ip_len) { 1063 PR_PACK_SUB(); 1064 switch (opack_ip->ip_len - tot_len) { 1065 case MAX_IPOPTLEN: 1066 if ((pongflags & F_RECORD_ROUTE) != 0) 1067 break; 1068 if ((pingflags & F_RECORD_ROUTE) == 0) 1069 goto out; 1070 pongflags |= F_RECORD_ROUTE; 1071 (void)printf("\nremote host does not " 1072 "support record route"); 1073 break; 1074 case 8: 1075 if ((pongflags & F_SOURCE_ROUTE) != 0) 1076 break; 1077 if ((pingflags & F_SOURCE_ROUTE) == 0) 1078 goto out; 1079 pongflags |= F_SOURCE_ROUTE; 1080 (void)printf("\nremote host does not " 1081 "support source route"); 1082 break; 1083 default: 1084 out: 1085 (void)printf("\nwrong total length %d " 1086 "instead of %d", tot_len, opack_ip->ip_len); 1087 break; 1088 } 1089 } 1090 1091 if (!dupflag) { 1092 static u_int16_t last_seqno = 0xffff; 1093 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1094 u_int16_t gap = seqno - (last_seqno + 1); 1095 if (gap > 0 && gap < 0x8000 && 1096 (pingflags & F_VERBOSE)) { 1097 (void)printf("[*** sequence gap of %u " 1098 "packets from %u ... %u ***]\n", gap, 1099 (u_int16_t) (last_seqno + 1), 1100 (u_int16_t) (seqno - 1)); 1101 if (pingflags & F_QUIET) 1102 summary(0); 1103 } 1104 1105 if (gap < 0x8000) 1106 last_seqno = seqno; 1107 } 1108 1109 if (pingflags & F_QUIET) 1110 return; 1111 1112 if (!(pingflags & F_FLOOD)) 1113 PR_PACK_SUB(); 1114 1115 /* check the data */ 1116 if ((size_t)(tot_len - hlen) > 1117 offsetof(struct icmp, icmp_data) + datalen 1118 && !(pingflags & F_PING_RANDOM) 1119 && memcmp(icp->icmp_data + phdrlen, 1120 opack_icmp.icmp_data + phdrlen, 1121 datalen - phdrlen)) { 1122 for (i = phdrlen; i < datalen; i++) { 1123 if (icp->icmp_data[i] != 1124 opack_icmp.icmp_data[i]) 1125 break; 1126 } 1127 PR_PACK_SUB(); 1128 (void)printf("\nwrong data byte #%d should have been" 1129 " %#x but was %#x", i - phdrlen, 1130 (u_char)opack_icmp.icmp_data[i], 1131 (u_char)icp->icmp_data[i]); 1132 for (i = phdrlen; i < datalen; i++) { 1133 if ((i % 16) == 0) 1134 (void)printf("\n\t"); 1135 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1136 } 1137 } 1138 1139 } else { 1140 if (!pr_icmph(icp, from, net_len)) 1141 return; 1142 dumped = 2; 1143 } 1144 1145 /* Display any IP options */ 1146 cp = buf + sizeof(struct ip); 1147 while (hlen > (int)sizeof(struct ip)) { 1148 switch (*cp) { 1149 case IPOPT_EOL: 1150 hlen = 0; 1151 break; 1152 case IPOPT_LSRR: 1153 hlen -= 2; 1154 j = *++cp; 1155 ++cp; 1156 j -= IPOPT_MINOFF; 1157 if (j <= 0) 1158 continue; 1159 if (dumped <= 1) { 1160 j = ((j+3)/4)*4; 1161 hlen -= j; 1162 cp += j; 1163 break; 1164 } 1165 PR_PACK_SUB(); 1166 (void)printf("\nLSRR: "); 1167 for (;;) { 1168 pr_saddr(cp); 1169 cp += 4; 1170 hlen -= 4; 1171 j -= 4; 1172 if (j <= 0) 1173 break; 1174 (void)putchar('\n'); 1175 } 1176 break; 1177 case IPOPT_RR: 1178 j = *++cp; /* get length */ 1179 i = *++cp; /* and pointer */ 1180 hlen -= 2; 1181 if (i > j) 1182 i = j; 1183 i -= IPOPT_MINOFF; 1184 if (i <= 0) 1185 continue; 1186 if (dumped <= 1) { 1187 if (i == old_rrlen 1188 && !memcmp(cp, old_rr, i)) { 1189 if (dumped) 1190 (void)printf("\t(same route)"); 1191 j = ((i+3)/4)*4; 1192 hlen -= j; 1193 cp += j; 1194 break; 1195 } 1196 old_rrlen = i; 1197 (void) memcpy(old_rr, cp, i); 1198 } 1199 if (!dumped) { 1200 jiggle_flush(1); 1201 (void)printf("RR: "); 1202 dumped = 1; 1203 } else { 1204 (void)printf("\nRR: "); 1205 } 1206 for (;;) { 1207 pr_saddr(cp); 1208 cp += 4; 1209 hlen -= 4; 1210 i -= 4; 1211 if (i <= 0) 1212 break; 1213 (void)putchar('\n'); 1214 } 1215 break; 1216 case IPOPT_NOP: 1217 if (dumped <= 1) 1218 break; 1219 PR_PACK_SUB(); 1220 (void)printf("\nNOP"); 1221 break; 1222 #ifdef sgi 1223 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1224 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1225 case IPOPT_CIPSO: /* Commercial IPSO */ 1226 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1227 i = (unsigned)cp[1]; 1228 hlen -= i - 1; 1229 PR_PACK_SUB(); 1230 (void)printf("\nSEC:"); 1231 while (i--) { 1232 (void)printf(" %02x", *cp++); 1233 } 1234 cp--; 1235 break; 1236 } 1237 #endif 1238 default: 1239 PR_PACK_SUB(); 1240 (void)printf("\nunknown option 0x%x", *cp); 1241 break; 1242 } 1243 hlen--; 1244 cp++; 1245 } 1246 1247 if (dumped) { 1248 (void)putchar('\n'); 1249 (void)fflush(stdout); 1250 } else { 1251 jiggle(-1); 1252 } 1253 } 1254 1255 1256 /* Compute the IP checksum 1257 * This assumes the packet is less than 32K long. 1258 */ 1259 static u_int16_t 1260 in_cksum(u_int16_t *p, u_int len) 1261 { 1262 u_int32_t sum = 0; 1263 int nwords = len >> 1; 1264 1265 while (nwords-- != 0) 1266 sum += *p++; 1267 1268 if (len & 1) { 1269 union { 1270 u_int16_t w; 1271 u_int8_t c[2]; 1272 } u; 1273 u.c[0] = *(u_char *)p; 1274 u.c[1] = 0; 1275 sum += u.w; 1276 } 1277 1278 /* end-around-carry */ 1279 sum = (sum >> 16) + (sum & 0xffff); 1280 sum += (sum >> 16); 1281 return (~sum); 1282 } 1283 1284 1285 /* 1286 * compute the difference of two timespecs in seconds 1287 */ 1288 static double 1289 diffsec(struct timespec *timenow, 1290 struct timespec *then) 1291 { 1292 if (timenow->tv_sec == 0) 1293 return -1; 1294 return (timenow->tv_sec - then->tv_sec) 1295 * 1.0 + (timenow->tv_nsec - then->tv_nsec) / 1000000000.0; 1296 } 1297 1298 1299 #if 0 1300 static void 1301 timespecadd(struct timespec *t1, 1302 struct timespec *t2) 1303 { 1304 1305 t1->tv_sec += t2->tv_sec; 1306 if ((t1->tv_nsec += t2->tv_nsec) >= 1000000000) { 1307 t1->tv_sec++; 1308 t1->tv_nsec -= 1000000000; 1309 } 1310 } 1311 #endif 1312 1313 1314 static void 1315 sec_to_timespec(const double sec, struct timespec *tp) 1316 { 1317 tp->tv_sec = sec; 1318 tp->tv_nsec = (sec - tp->tv_sec) * 1000000000.0; 1319 } 1320 1321 1322 static double 1323 timespec_to_sec(const struct timespec *tp) 1324 { 1325 return tp->tv_sec + tp->tv_nsec / 1000000000.0; 1326 } 1327 1328 1329 /* 1330 * Print statistics. 1331 * Heavily buffered STDIO is used here, so that all the statistics 1332 * will be written with 1 sys-write call. This is nice when more 1333 * than one copy of the program is running on a terminal; it prevents 1334 * the statistics output from becomming intermingled. 1335 */ 1336 static void 1337 summary(int header) 1338 { 1339 jiggle_flush(1); 1340 1341 if (header) 1342 (void)printf("\n----%s PING Statistics----\n", hostname); 1343 (void)printf("%d packets transmitted, ", ntransmitted); 1344 (void)printf("%d packets received, ", nreceived); 1345 if (nrepeats) 1346 (void)printf("+%d duplicates, ", nrepeats); 1347 if (ntransmitted) { 1348 if (nreceived > ntransmitted) 1349 (void)printf("-- somebody's duplicating packets!"); 1350 else 1351 (void)printf("%.1f%% packet loss", 1352 (((ntransmitted-nreceived)*100.0) / 1353 ntransmitted)); 1354 } 1355 (void)printf("\n"); 1356 if (nreceived && (pingflags & (F_TIMING|F_TIMING64))) { 1357 double n = nreceived + nrepeats; 1358 double avg = (tsum / n); 1359 double variance = 0.0; 1360 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 1361 if (n>1) 1362 variance = (tsumsq - n*avg*avg) /(n-1); 1363 1364 (void)printf("round-trip min/avg/max/stddev = " 1365 "%.*f/%.*f/%.*f/%.*f ms\n", 1366 prec, tmin * 1000.0, 1367 prec, avg * 1000.0, 1368 prec, tmax * 1000.0, 1369 prec, sqrt(variance) * 1000.0); 1370 if (pingflags & F_FLOOD) { 1371 double r = diffsec(&last_rx, &first_rx); 1372 double t = diffsec(&last_tx, &first_tx); 1373 if (r == 0) 1374 r = 0.0001; 1375 if (t == 0) 1376 t = 0.0001; 1377 (void)printf(" %.1f packets/sec sent, " 1378 " %.1f packets/sec received\n", 1379 ntransmitted/t, nreceived/r); 1380 } 1381 } 1382 } 1383 1384 1385 /* 1386 * Print statistics when SIGINFO is received. 1387 */ 1388 /* ARGSUSED */ 1389 static void 1390 prtsig(int dummy) 1391 { 1392 1393 summary(0); 1394 #ifndef SIGINFO 1395 (void)signal(SIGQUIT, prtsig); 1396 #endif 1397 } 1398 1399 1400 /* 1401 * On the first SIGINT, allow any outstanding packets to dribble in 1402 */ 1403 static void 1404 prefinish(int sig) 1405 { 1406 if (lastrcvd /* quit now if caught up */ 1407 || nreceived == 0) /* or if remote is dead */ 1408 finish(0); 1409 1410 (void)signal(sig, finish); /* do this only the 1st time */ 1411 1412 if (npackets > ntransmitted) /* let the normal limit work */ 1413 npackets = ntransmitted; 1414 } 1415 1416 /* 1417 * Print statistics and give up. 1418 */ 1419 /* ARGSUSED */ 1420 static void 1421 finish(int dummy) 1422 { 1423 #ifdef SIGINFO 1424 (void)signal(SIGINFO, SIG_DFL); 1425 #else 1426 (void)signal(SIGQUIT, SIG_DFL); 1427 #endif 1428 1429 summary(1); 1430 exit(nreceived > 0 ? 0 : 2); 1431 } 1432 1433 1434 static int /* 0=do not print it */ 1435 ck_pr_icmph(struct icmp *icp, 1436 struct sockaddr_in *from, 1437 int cc, 1438 int override) /* 1=override VERBOSE if interesting */ 1439 { 1440 int hlen; 1441 struct ip ipb, *ip = &ipb; 1442 struct icmp icp2b, *icp2 = &icp2b; 1443 int res; 1444 1445 if (pingflags & F_VERBOSE) { 1446 res = 1; 1447 jiggle_flush(1); 1448 } else { 1449 res = 0; 1450 } 1451 1452 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1453 hlen = ip->ip_hl << 2; 1454 if (ip->ip_p == IPPROTO_ICMP 1455 && hlen + 6 <= cc) { 1456 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1457 if (icp2->icmp_id == ident) { 1458 /* remember to clear route cached in kernel 1459 * if this non-Echo-Reply ICMP message was for one 1460 * of our packets. 1461 */ 1462 clear_cache.tv_sec = 0; 1463 1464 if (!res && override 1465 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1466 jiggle_flush(1); 1467 (void)printf("%d bytes from %s: ", 1468 cc, pr_addr(&from->sin_addr)); 1469 res = 1; 1470 } 1471 } 1472 } 1473 1474 return res; 1475 } 1476 1477 1478 /* 1479 * Print a descriptive string about an ICMP header other than an echo reply. 1480 */ 1481 static int /* 0=printed nothing */ 1482 pr_icmph(struct icmp *icp, 1483 struct sockaddr_in *from, 1484 int cc) 1485 { 1486 switch (icp->icmp_type ) { 1487 case ICMP_UNREACH: 1488 if (!ck_pr_icmph(icp, from, cc, 1)) 1489 return 0; 1490 switch (icp->icmp_code) { 1491 case ICMP_UNREACH_NET: 1492 (void)printf("Destination Net Unreachable"); 1493 break; 1494 case ICMP_UNREACH_HOST: 1495 (void)printf("Destination Host Unreachable"); 1496 break; 1497 case ICMP_UNREACH_PROTOCOL: 1498 (void)printf("Destination Protocol Unreachable"); 1499 break; 1500 case ICMP_UNREACH_PORT: 1501 (void)printf("Destination Port Unreachable"); 1502 break; 1503 case ICMP_UNREACH_NEEDFRAG: 1504 (void)printf("frag needed and DF set. Next MTU=%d", 1505 ntohs(icp->icmp_nextmtu)); 1506 break; 1507 case ICMP_UNREACH_SRCFAIL: 1508 (void)printf("Source Route Failed"); 1509 break; 1510 case ICMP_UNREACH_NET_UNKNOWN: 1511 (void)printf("Unreachable unknown net"); 1512 break; 1513 case ICMP_UNREACH_HOST_UNKNOWN: 1514 (void)printf("Unreachable unknown host"); 1515 break; 1516 case ICMP_UNREACH_ISOLATED: 1517 (void)printf("Unreachable host isolated"); 1518 break; 1519 case ICMP_UNREACH_NET_PROHIB: 1520 (void)printf("Net prohibited access"); 1521 break; 1522 case ICMP_UNREACH_HOST_PROHIB: 1523 (void)printf("Host prohibited access"); 1524 break; 1525 case ICMP_UNREACH_TOSNET: 1526 (void)printf("Bad TOS for net"); 1527 break; 1528 case ICMP_UNREACH_TOSHOST: 1529 (void)printf("Bad TOS for host"); 1530 break; 1531 case 13: 1532 (void)printf("Communication prohibited"); 1533 break; 1534 case 14: 1535 (void)printf("Host precedence violation"); 1536 break; 1537 case 15: 1538 (void)printf("Precedence cutoff"); 1539 break; 1540 default: 1541 (void)printf("Bad Destination Unreachable Code: %d", 1542 icp->icmp_code); 1543 break; 1544 } 1545 /* Print returned IP header information */ 1546 pr_retip(icp, cc); 1547 break; 1548 1549 case ICMP_SOURCEQUENCH: 1550 if (!ck_pr_icmph(icp, from, cc, 1)) 1551 return 0; 1552 (void)printf("Source Quench"); 1553 pr_retip(icp, cc); 1554 break; 1555 1556 case ICMP_REDIRECT: 1557 if (!ck_pr_icmph(icp, from, cc, 1)) 1558 return 0; 1559 switch (icp->icmp_code) { 1560 case ICMP_REDIRECT_NET: 1561 (void)printf("Redirect Network"); 1562 break; 1563 case ICMP_REDIRECT_HOST: 1564 (void)printf("Redirect Host"); 1565 break; 1566 case ICMP_REDIRECT_TOSNET: 1567 (void)printf("Redirect Type of Service and Network"); 1568 break; 1569 case ICMP_REDIRECT_TOSHOST: 1570 (void)printf("Redirect Type of Service and Host"); 1571 break; 1572 default: 1573 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1574 break; 1575 } 1576 (void)printf(" New router addr: %s", 1577 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1578 pr_retip(icp, cc); 1579 break; 1580 1581 case ICMP_ECHO: 1582 if (!ck_pr_icmph(icp, from, cc, 0)) 1583 return 0; 1584 (void)printf("Echo Request: ID=%d seq=%d", 1585 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1586 break; 1587 1588 case ICMP_ECHOREPLY: 1589 /* displaying other's pings is too noisey */ 1590 #if 0 1591 if (!ck_pr_icmph(icp, from, cc, 0)) 1592 return 0; 1593 (void)printf("Echo Reply: ID=%d seq=%d", 1594 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1595 break; 1596 #else 1597 return 0; 1598 #endif 1599 1600 case ICMP_ROUTERADVERT: 1601 if (!ck_pr_icmph(icp, from, cc, 0)) 1602 return 0; 1603 (void)printf("Router Discovery Advert"); 1604 break; 1605 1606 case ICMP_ROUTERSOLICIT: 1607 if (!ck_pr_icmph(icp, from, cc, 0)) 1608 return 0; 1609 (void)printf("Router Discovery Solicit"); 1610 break; 1611 1612 case ICMP_TIMXCEED: 1613 if (!ck_pr_icmph(icp, from, cc, 1)) 1614 return 0; 1615 switch (icp->icmp_code ) { 1616 case ICMP_TIMXCEED_INTRANS: 1617 (void)printf("Time To Live exceeded"); 1618 break; 1619 case ICMP_TIMXCEED_REASS: 1620 (void)printf("Frag reassembly time exceeded"); 1621 break; 1622 default: 1623 (void)printf("Time exceeded, Bad Code: %d", 1624 icp->icmp_code); 1625 break; 1626 } 1627 pr_retip(icp, cc); 1628 break; 1629 1630 case ICMP_PARAMPROB: 1631 if (!ck_pr_icmph(icp, from, cc, 1)) 1632 return 0; 1633 (void)printf("Parameter problem: pointer = 0x%02x", 1634 icp->icmp_hun.ih_pptr); 1635 pr_retip(icp, cc); 1636 break; 1637 1638 case ICMP_TSTAMP: 1639 if (!ck_pr_icmph(icp, from, cc, 0)) 1640 return 0; 1641 (void)printf("Timestamp"); 1642 break; 1643 1644 case ICMP_TSTAMPREPLY: 1645 if (!ck_pr_icmph(icp, from, cc, 0)) 1646 return 0; 1647 (void)printf("Timestamp Reply"); 1648 break; 1649 1650 case ICMP_IREQ: 1651 if (!ck_pr_icmph(icp, from, cc, 0)) 1652 return 0; 1653 (void)printf("Information Request"); 1654 break; 1655 1656 case ICMP_IREQREPLY: 1657 if (!ck_pr_icmph(icp, from, cc, 0)) 1658 return 0; 1659 (void)printf("Information Reply"); 1660 break; 1661 1662 case ICMP_MASKREQ: 1663 if (!ck_pr_icmph(icp, from, cc, 0)) 1664 return 0; 1665 (void)printf("Address Mask Request"); 1666 break; 1667 1668 case ICMP_MASKREPLY: 1669 if (!ck_pr_icmph(icp, from, cc, 0)) 1670 return 0; 1671 (void)printf("Address Mask Reply"); 1672 break; 1673 1674 default: 1675 if (!ck_pr_icmph(icp, from, cc, 0)) 1676 return 0; 1677 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1678 if (pingflags & F_VERBOSE) 1679 pr_iph(icp, cc); 1680 } 1681 1682 return 1; 1683 } 1684 1685 1686 /* 1687 * Print an IP header with options. 1688 */ 1689 static void 1690 pr_iph(struct icmp *icp, 1691 int cc) 1692 { 1693 int hlen; 1694 u_char *cp; 1695 struct ip ipb, *ip = &ipb; 1696 1697 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1698 1699 hlen = ip->ip_hl << 2; 1700 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1701 1702 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1703 (void)printf(" %1x %1x %02x %04x %04x", 1704 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1705 (void)printf(" %1x %04x", 1706 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1707 (void)printf(" %02x %02x %04x", 1708 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1709 (void)printf(" %15s ", 1710 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1711 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1712 /* dump any option bytes */ 1713 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1714 (void)printf("%02x", *cp++); 1715 } 1716 } 1717 1718 /* 1719 * Print an ASCII host address starting from a string of bytes. 1720 */ 1721 static void 1722 pr_saddr(u_char *cp) 1723 { 1724 n_long l; 1725 struct in_addr addr; 1726 1727 l = (u_char)*++cp; 1728 l = (l<<8) + (u_char)*++cp; 1729 l = (l<<8) + (u_char)*++cp; 1730 l = (l<<8) + (u_char)*++cp; 1731 addr.s_addr = htonl(l); 1732 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1733 } 1734 1735 1736 /* 1737 * Return an ASCII host address 1738 * as a dotted quad and optionally with a hostname 1739 */ 1740 static char * 1741 pr_addr(struct in_addr *addr) /* in network order */ 1742 { 1743 struct hostent *hp; 1744 static char buf[MAXHOSTNAMELEN+4+16+1]; 1745 1746 if ((pingflags & F_NUMERIC) 1747 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1748 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1749 } else { 1750 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1751 inet_ntoa(*addr)); 1752 } 1753 1754 return buf; 1755 } 1756 1757 /* 1758 * Dump some info on a returned (via ICMP) IP packet. 1759 */ 1760 static void 1761 pr_retip(struct icmp *icp, 1762 int cc) 1763 { 1764 int hlen; 1765 u_char *cp; 1766 struct ip ipb, *ip = &ipb; 1767 1768 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1769 1770 if (pingflags & F_VERBOSE) 1771 pr_iph(icp, cc); 1772 1773 hlen = ip->ip_hl << 2; 1774 cp = (u_char *) &icp->icmp_data[hlen]; 1775 1776 if (ip->ip_p == IPPROTO_TCP) { 1777 if (pingflags & F_VERBOSE) 1778 (void)printf("\n TCP: from port %u, to port %u", 1779 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1780 } else if (ip->ip_p == IPPROTO_UDP) { 1781 if (pingflags & F_VERBOSE) 1782 (void)printf("\n UDP: from port %u, to port %u", 1783 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1784 } else if (ip->ip_p == IPPROTO_ICMP) { 1785 struct icmp icp2; 1786 (void) memcpy(&icp2, cp, sizeof(icp2)); 1787 if (icp2.icmp_type == ICMP_ECHO) { 1788 if (pingflags & F_VERBOSE) 1789 (void)printf("\n ID=%u icmp_seq=%u", 1790 ntohs((u_int16_t)icp2.icmp_id), 1791 ntohs((u_int16_t)icp2.icmp_seq)); 1792 else 1793 (void)printf(" for icmp_seq=%u", 1794 ntohs((u_int16_t)icp2.icmp_seq)); 1795 } 1796 } 1797 } 1798 1799 static void 1800 fill(void) 1801 { 1802 int i, j, k; 1803 char *cp; 1804 int pat[16]; 1805 1806 for (cp = fill_pat; *cp != '\0'; cp++) { 1807 if (!isxdigit((unsigned char)*cp)) 1808 break; 1809 } 1810 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1811 (void)fflush(stdout); 1812 errx(EXIT_FAILURE, "\"-p %s\": patterns must be specified with" 1813 " 1-32 hex digits\n", 1814 fill_pat); 1815 } 1816 1817 i = sscanf(fill_pat, 1818 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1819 &pat[0], &pat[1], &pat[2], &pat[3], 1820 &pat[4], &pat[5], &pat[6], &pat[7], 1821 &pat[8], &pat[9], &pat[10], &pat[11], 1822 &pat[12], &pat[13], &pat[14], &pat[15]); 1823 1824 for (k = phdrlen, j = 0; k < datalen; k++) { 1825 opack_icmp.icmp_data[k] = pat[j]; 1826 if (++j >= i) 1827 j = 0; 1828 } 1829 1830 if (!(pingflags & F_QUIET)) { 1831 (void)printf("PATTERN: 0x"); 1832 for (j=0; j<i; j++) 1833 (void)printf("%02x", 1834 (u_char)opack_icmp.icmp_data[phdrlen + j]); 1835 (void)printf("\n"); 1836 } 1837 1838 } 1839 1840 1841 static void 1842 rnd_fill(void) 1843 { 1844 static u_int32_t rnd; 1845 int i; 1846 1847 for (i = phdrlen; i < datalen; i++) { 1848 rnd = (3141592621U * rnd + 663896637U); 1849 opack_icmp.icmp_data[i] = rnd>>24; 1850 } 1851 } 1852 1853 1854 static void 1855 gethost(const char *arg, 1856 const char *name, 1857 struct sockaddr_in *sa, 1858 char *realname, 1859 int realname_len) 1860 { 1861 struct hostent *hp; 1862 1863 (void)memset(sa, 0, sizeof(*sa)); 1864 sa->sin_family = AF_INET; 1865 sa->sin_len = sizeof(struct sockaddr_in); 1866 1867 /* If it is an IP address, try to convert it to a name to 1868 * have something nice to display. 1869 */ 1870 if (inet_aton(name, &sa->sin_addr) != 0) { 1871 if (realname) { 1872 if (pingflags & F_NUMERIC) 1873 hp = 0; 1874 else 1875 hp = gethostbyaddr((char *)&sa->sin_addr, 1876 sizeof(sa->sin_addr), AF_INET); 1877 (void)strlcpy(realname, hp ? hp->h_name : name, 1878 realname_len); 1879 } 1880 return; 1881 } 1882 1883 hp = gethostbyname(name); 1884 if (!hp) 1885 errx(EXIT_FAILURE, "Cannot resolve \"%s\" (%s)", 1886 name, hstrerror(h_errno)); 1887 1888 if (hp->h_addrtype != AF_INET) 1889 errx(EXIT_FAILURE, "%s only supported with IP", arg); 1890 1891 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1892 1893 if (realname) 1894 (void)strlcpy(realname, hp->h_name, realname_len); 1895 } 1896 1897 1898 static void 1899 usage(void) 1900 { 1901 #ifdef IPSEC 1902 #ifdef IPSEC_POLICY_IPSEC 1903 #define IPSECOPT "\n [-E policy] " 1904 #else 1905 #define IPSECOPT "\n [-AE] " 1906 #endif /*IPSEC_POLICY_IPSEC*/ 1907 #else 1908 #define IPSECOPT "" 1909 #endif /*IPSEC*/ 1910 1911 (void)fprintf(stderr, "usage: \n" 1912 "%s [-aCDdfLnoPQqRrv] [-c count] [-g gateway] [-h host]" 1913 " [-I addr] [-i interval]\n" 1914 " [-l preload] [-p pattern] [-s size] [-T ttl] [-t tos]" 1915 " [-w maxwait] " IPSECOPT "host\n", 1916 getprogname()); 1917 exit(1); 1918 } 1919
Indexes created Wed Oct 01 19:09:53 GMT 2025