ping.c revision 1.111
1 /* $NetBSD: ping.c,v 1.111 2016/07/31 18:14:36 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 1.111 2016/07/31 18:14:36 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 static sigset_t blockmask, enablemask; /* signal masks */ 164 165 #ifndef __NetBSD__ 166 static char *progname; 167 #define getprogname() (progname) 168 #define setprogname(name) ((void)(progname = (name))) 169 #endif 170 171 static char hostname[MAXHOSTNAMELEN]; 172 173 static struct { 174 struct ip o_ip; 175 char o_opt[MAX_IPOPTLEN]; 176 union { 177 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 178 struct icmp u_icmp; 179 } o_u; 180 } out_pack; 181 #define opack_icmp out_pack.o_u.u_icmp 182 static struct ip *opack_ip; 183 184 static char optspace[MAX_IPOPTLEN]; /* record route space */ 185 static int optlen; 186 187 static int npackets; /* total packets to send */ 188 static int preload; /* number of packets to "preload" */ 189 static int ntransmitted; /* output sequence # = #sent */ 190 static int ident; /* our ID, in network byte order */ 191 192 static int nreceived; /* # of packets we got back */ 193 194 static double interval; /* interval between packets */ 195 static struct timespec interval_tv; 196 static double tmin = 999999999.0; 197 static double tmax = 0.0; 198 static double tsum = 0.0; /* sum of all times */ 199 static double tsumsq = 0.0; 200 static double maxwait = 0.0; 201 202 static int bufspace = IP_MAXPACKET; 203 204 static struct timespec now, clear_cache, last_tx, next_tx, first_tx; 205 static struct timespec last_rx, first_rx; 206 static int lastrcvd = 1; /* last ping sent has been received */ 207 208 static struct timespec jiggle_time; 209 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 210 211 __dead static void doit(void); 212 static void prefinish(int); 213 static void prtsig(int); 214 __dead static void finish(int); 215 static void blocksignals(void); 216 static void enablesignals(void); 217 static void summary(int); 218 static void pinger(void); 219 static void fill(void); 220 static void rnd_fill(void); 221 static double diffsec(struct timespec *, struct timespec *); 222 #if 0 223 static void timespecadd(struct timespec *, struct timespec *); 224 #endif 225 static void sec_to_timespec(const double, struct timespec *); 226 static double timespec_to_sec(const struct timespec *); 227 static void pr_pack(u_char *, int, struct sockaddr_in *); 228 static u_int16_t in_cksum(u_int16_t *, u_int); 229 static void pr_saddr(u_char *); 230 static char *pr_addr(struct in_addr *); 231 static void pr_iph(struct icmp *, int); 232 static void pr_retip(struct icmp *, int); 233 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 234 static void jiggle(int), jiggle_flush(int); 235 static void gethost(const char *, const char *, 236 struct sockaddr_in *, char *, int); 237 __dead static void usage(void); 238 239 int 240 main(int argc, char *argv[]) 241 { 242 int c, i, on = 1, hostind = 0; 243 long l; 244 int len = -1, compat = 0; 245 u_char ttl = 0; 246 u_long tos = 0; 247 char *p; 248 #ifdef IPSEC 249 #ifdef IPSEC_POLICY_IPSEC 250 char *policy_in = NULL; 251 char *policy_out = NULL; 252 #endif 253 #endif 254 #ifdef SIGINFO 255 struct sigaction sa; 256 #endif 257 258 if (prog_init && prog_init() == -1) 259 err(EXIT_FAILURE, "init failed"); 260 261 if ((s = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 262 err(EXIT_FAILURE, "Cannot create socket"); 263 if ((sloop = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 264 err(EXIT_FAILURE, "Cannot create socket"); 265 266 /* 267 * sloop is never read on. This prevents packets from 268 * queueing in its recv buffer. 269 */ 270 if (prog_shutdown(sloop, SHUT_RD) == -1) 271 warn("Cannot shutdown for read"); 272 273 if (prog_setuid(prog_getuid()) == -1) 274 err(EXIT_FAILURE, "setuid"); 275 276 setprogname(argv[0]); 277 278 #ifndef IPSEC 279 #define IPSECOPT 280 #else 281 #ifdef IPSEC_POLICY_IPSEC 282 #define IPSECOPT "E:" 283 #else 284 #define IPSECOPT "AE" 285 #endif /*IPSEC_POLICY_IPSEC*/ 286 #endif 287 while ((c = getopt(argc, argv, 288 "ac:CdDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 289 #undef IPSECOPT 290 switch (c) { 291 case 'a': 292 pingflags |= F_AUDIBLE; 293 break; 294 case 'C': 295 compat = 1; 296 break; 297 case 'c': 298 npackets = strtol(optarg, &p, 0); 299 if (*p != '\0' || npackets <= 0) 300 errx(EXIT_FAILURE, 301 "Bad/invalid number of packets: %s", 302 optarg); 303 break; 304 case 'D': 305 pingflags |= F_DF; 306 break; 307 case 'd': 308 options |= SO_DEBUG; 309 break; 310 case 'f': 311 pingflags |= F_FLOOD; 312 break; 313 case 'h': 314 hostind = optind-1; 315 break; 316 case 'i': /* wait between sending packets */ 317 interval = strtod(optarg, &p); 318 if (*p != '\0' || interval <= 0) 319 errx(EXIT_FAILURE, "Bad/invalid interval: %s", 320 optarg); 321 break; 322 case 'l': 323 preload = strtol(optarg, &p, 0); 324 if (*p != '\0' || preload < 0) 325 errx(EXIT_FAILURE, "Bad/invalid preload value: " 326 "%s", optarg); 327 break; 328 case 'n': 329 pingflags |= F_NUMERIC; 330 break; 331 case 'o': 332 pingflags |= F_ONCE; 333 break; 334 case 'p': /* fill buffer with user pattern */ 335 if (pingflags & F_PING_RANDOM) 336 errx(EXIT_FAILURE, 337 "Only one of -P and -p allowed"); 338 pingflags |= F_PING_FILLED; 339 fill_pat = optarg; 340 break; 341 case 'P': 342 if (pingflags & F_PING_FILLED) 343 errx(EXIT_FAILURE, 344 "Only one of -P and -p allowed"); 345 pingflags |= F_PING_RANDOM; 346 break; 347 case 'q': 348 pingflags |= F_QUIET; 349 break; 350 case 'Q': 351 pingflags |= F_SEMI_QUIET; 352 break; 353 case 'r': 354 options |= SO_DONTROUTE; 355 break; 356 case 's': /* size of packet to send */ 357 l = strtol(optarg, &p, 0); 358 if (*p != '\0' || l < 0) 359 errx(EXIT_FAILURE, 360 "Bad/invalid packet size: %s", optarg); 361 if (l > MAXPACKET) 362 errx(EXIT_FAILURE, "packet size is too large"); 363 len = (int)l; 364 break; 365 case 'v': 366 pingflags |= F_VERBOSE; 367 break; 368 case 'R': 369 pingflags |= F_RECORD_ROUTE; 370 break; 371 case 'L': 372 pingflags |= F_MCAST_NOLOOP; 373 break; 374 case 't': 375 tos = strtoul(optarg, &p, 0); 376 if (*p != '\0' || tos > 0xFF) 377 errx(EXIT_FAILURE, "bad tos value: %s", optarg); 378 break; 379 case 'T': 380 l = strtol(optarg, &p, 0); 381 if (*p != '\0' || l > 255 || l <= 0) 382 errx(EXIT_FAILURE, "ttl out of range: %s", 383 optarg); 384 ttl = (u_char)l; /* cannot check >255 otherwise */ 385 break; 386 case 'I': 387 pingflags |= F_SOURCE_ADDR; 388 gethost("-I", optarg, &src_addr, 0, 0); 389 break; 390 case 'g': 391 pingflags |= F_SOURCE_ROUTE; 392 gethost("-g", optarg, &send_addr, 0, 0); 393 break; 394 case 'w': 395 maxwait = strtod(optarg, &p); 396 if (*p != '\0' || maxwait <= 0) 397 errx(EXIT_FAILURE, "Bad/invalid maxwait time: " 398 "%s", optarg); 399 break; 400 #ifdef IPSEC 401 #ifdef IPSEC_POLICY_IPSEC 402 case 'E': 403 pingflags |= F_POLICY; 404 if (!strncmp("in", optarg, 2)) { 405 policy_in = strdup(optarg); 406 if (!policy_in) 407 err(EXIT_FAILURE, "strdup"); 408 } else if (!strncmp("out", optarg, 3)) { 409 policy_out = strdup(optarg); 410 if (!policy_out) 411 err(EXIT_FAILURE, "strdup"); 412 } else 413 errx(EXIT_FAILURE, "invalid security policy: " 414 "%s", optarg); 415 break; 416 #else 417 case 'A': 418 pingflags |= F_AUTHHDR; 419 break; 420 case 'E': 421 pingflags |= F_ENCRYPT; 422 break; 423 #endif /*IPSEC_POLICY_IPSEC*/ 424 #endif /*IPSEC*/ 425 default: 426 usage(); 427 break; 428 } 429 } 430 431 if (interval == 0) 432 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 433 #ifndef sgi 434 if (pingflags & F_FLOOD && prog_getuid()) 435 errx(EXIT_FAILURE, "Must be superuser to use -f"); 436 if (interval < 1.0 && prog_getuid()) 437 errx(EXIT_FAILURE, "Must be superuser to use < 1 sec " 438 "ping interval"); 439 if (preload > 0 && prog_getuid()) 440 errx(EXIT_FAILURE, "Must be superuser to use -l"); 441 #endif 442 sec_to_timespec(interval, &interval_tv); 443 444 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 445 warnx("Sorry, no audible output for flood pings"); 446 447 if (npackets != 0) { 448 npackets += preload; 449 } else { 450 npackets = INT_MAX; 451 } 452 453 if (hostind == 0) { 454 if (optind != argc-1) 455 usage(); 456 else 457 hostind = optind; 458 } 459 else if (hostind >= argc - 1) 460 usage(); 461 462 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 463 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 464 pingflags |= F_MCAST; 465 if (!(pingflags & F_SOURCE_ROUTE)) 466 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 467 468 loc_addr.sin_family = AF_INET; 469 loc_addr.sin_len = sizeof(struct sockaddr_in); 470 loc_addr.sin_addr.s_addr = htonl((127 << 24) + 1); 471 472 if (len != -1) 473 datalen = len; 474 else 475 datalen = 64 - PHDR_LEN; 476 if (!compat && datalen >= (int)PHDR64_LEN) { /* can we time them? */ 477 pingflags |= F_TIMING64; 478 phdrlen = PHDR64_LEN; 479 } else if (datalen >= (int)PHDR_LEN) { /* can we time them? */ 480 pingflags |= F_TIMING; 481 phdrlen = PHDR_LEN; 482 } else 483 phdrlen = 0; 484 485 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 486 if ((packet = malloc(packlen)) == NULL) 487 err(EXIT_FAILURE, "Can't allocate %d bytes", packlen); 488 489 if (pingflags & F_PING_FILLED) { 490 fill(); 491 } else if (pingflags & F_PING_RANDOM) { 492 rnd_fill(); 493 } else { 494 for (i = phdrlen; i < datalen; i++) 495 opack_icmp.icmp_data[i] = i; 496 } 497 498 ident = arc4random() & 0xFFFF; 499 500 if (options & SO_DEBUG) { 501 if (prog_setsockopt(s, SOL_SOCKET, SO_DEBUG, 502 (char *)&on, sizeof(on)) == -1) 503 warn("Can't turn on socket debugging"); 504 } 505 if (options & SO_DONTROUTE) { 506 if (prog_setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 507 (char *)&on, sizeof(on)) == -1) 508 warn("SO_DONTROUTE"); 509 } 510 511 if (options & SO_DEBUG) { 512 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 513 (char *)&on, sizeof(on)) == -1) 514 warn("Can't turn on socket debugging"); 515 } 516 if (options & SO_DONTROUTE) { 517 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 518 (char *)&on, sizeof(on)) == -1) 519 warn("SO_DONTROUTE"); 520 } 521 522 if (pingflags & F_SOURCE_ROUTE) { 523 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 524 optspace[IPOPT_OLEN] = optlen = 7; 525 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 526 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 527 sizeof(whereto.sin_addr)); 528 optspace[optlen++] = IPOPT_NOP; 529 } 530 if (pingflags & F_RECORD_ROUTE) { 531 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 532 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 533 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 534 optlen = MAX_IPOPTLEN; 535 } 536 /* this leaves opack_ip 0(mod 4) aligned */ 537 opack_ip = (struct ip *)((char *)&out_pack.o_ip 538 + sizeof(out_pack.o_opt) 539 - optlen); 540 (void) memcpy(opack_ip + 1, optspace, optlen); 541 542 if (prog_setsockopt(s, IPPROTO_IP, IP_HDRINCL, 543 (char *) &on, sizeof(on)) < 0) 544 err(EXIT_FAILURE, "Can't set special IP header"); 545 546 opack_ip->ip_v = IPVERSION; 547 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 548 opack_ip->ip_tos = tos; 549 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 550 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 551 opack_ip->ip_p = IPPROTO_ICMP; 552 opack_ip->ip_src = src_addr.sin_addr; 553 opack_ip->ip_dst = send_addr.sin_addr; 554 555 if (pingflags & F_MCAST) { 556 if (pingflags & F_MCAST_NOLOOP) { 557 u_char loop = 0; 558 if (prog_setsockopt(s, IPPROTO_IP, 559 IP_MULTICAST_LOOP, 560 (char *) &loop, 1) < 0) 561 err(EXIT_FAILURE, "Can't disable multicast loopback"); 562 } 563 564 if (ttl != 0 565 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 566 (char *) &ttl, 1) < 0) 567 err(EXIT_FAILURE, "Can't set multicast time-to-live"); 568 569 if ((pingflags & F_SOURCE_ADDR) 570 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 571 (char *) &src_addr.sin_addr, 572 sizeof(src_addr.sin_addr)) < 0) 573 err(EXIT_FAILURE, "Can't set multicast source interface"); 574 575 } else if (pingflags & F_SOURCE_ADDR) { 576 if (prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 577 (char *) &src_addr.sin_addr, 578 sizeof(src_addr.sin_addr)) < 0) 579 err(EXIT_FAILURE, "Can't set source interface/address"); 580 } 581 #ifdef IPSEC 582 #ifdef IPSEC_POLICY_IPSEC 583 { 584 char *buf; 585 if (pingflags & F_POLICY) { 586 if (policy_in != NULL) { 587 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 588 if (buf == NULL) 589 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 590 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 591 buf, ipsec_get_policylen(buf)) < 0) { 592 err(EXIT_FAILURE, "ipsec policy cannot be " 593 "configured"); 594 } 595 free(buf); 596 } 597 if (policy_out != NULL) { 598 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 599 if (buf == NULL) 600 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 601 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 602 buf, ipsec_get_policylen(buf)) < 0) { 603 err(EXIT_FAILURE, "ipsec policy cannot be " 604 "configured"); 605 } 606 free(buf); 607 } 608 } 609 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 610 if (buf == NULL) 611 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 612 if (prog_setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 613 buf, ipsec_get_policylen(buf)) < 0) { 614 #if 0 615 warnx("ipsec is not configured"); 616 #else 617 /* ignore it, should be okay */ 618 #endif 619 } 620 free(buf); 621 } 622 #else 623 { 624 int optval; 625 if (pingflags & F_AUTHHDR) { 626 optval = IPSEC_LEVEL_REQUIRE; 627 #ifdef IP_AUTH_TRANS_LEVEL 628 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 629 (char *)&optval, sizeof(optval)); 630 #else 631 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 632 (char *)&optval, sizeof(optval)); 633 #endif 634 } 635 if (pingflags & F_ENCRYPT) { 636 optval = IPSEC_LEVEL_REQUIRE; 637 (void)prog_setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 638 (char *)&optval, sizeof(optval)); 639 } 640 optval = IPSEC_LEVEL_BYPASS; 641 #ifdef IP_AUTH_TRANS_LEVEL 642 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 643 (char *)&optval, sizeof(optval)); 644 #else 645 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 646 (char *)&optval, sizeof(optval)); 647 #endif 648 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 649 (char *)&optval, sizeof(optval)); 650 } 651 #endif /*IPSEC_POLICY_IPSEC*/ 652 #endif /*IPSEC*/ 653 654 (void)printf("PING %s (%s): %d data bytes\n", hostname, 655 inet_ntoa(whereto.sin_addr), datalen); 656 657 /* When pinging the broadcast address, you can get a lot 658 * of answers. Doing something so evil is useful if you 659 * are trying to stress the ethernet, or just want to 660 * fill the arp cache to get some stuff for /etc/ethers. 661 */ 662 while (0 > prog_setsockopt(s, SOL_SOCKET, SO_RCVBUF, 663 (char*)&bufspace, sizeof(bufspace))) { 664 if ((bufspace -= 4096) <= 0) 665 err(EXIT_FAILURE, "Cannot set the receive buffer size"); 666 } 667 668 /* make it possible to send giant probes, but do not worry now 669 * if it fails, since we probably won't send giant probes. 670 */ 671 (void)prog_setsockopt(s, SOL_SOCKET, SO_SNDBUF, 672 (char*)&bufspace, sizeof(bufspace)); 673 674 (void)signal(SIGINT, prefinish); 675 676 /* 677 * Set up two signal masks: 678 * - blockmask blocks the signals we catch 679 * - enablemask does not 680 */ 681 682 sigemptyset(&enablemask); 683 sigemptyset(&blockmask); 684 sigaddset(&blockmask, SIGINT); 685 #ifdef SIGINFO 686 sigaddset(&blockmask, SIGINFO); 687 #else 688 sigaddset(&blockmask, SIGQUIT); 689 #endif 690 691 #ifdef SIGINFO 692 sa.sa_handler = prtsig; 693 sa.sa_flags = SA_NOKERNINFO; 694 sigemptyset(&sa.sa_mask); 695 (void)sigaction(SIGINFO, &sa, NULL); 696 #else 697 (void)signal(SIGQUIT, prtsig); 698 #endif 699 (void)signal(SIGCONT, prtsig); 700 701 blocksignals(); 702 703 /* fire off them quickies */ 704 for (i = 0; i < preload; i++) { 705 clock_gettime(CLOCK_MONOTONIC, &now); 706 pinger(); 707 } 708 709 doit(); 710 return 0; 711 } 712 713 static void 714 doit(void) 715 { 716 int cc; 717 struct sockaddr_in from; 718 socklen_t fromlen; 719 double sec, last, d_last; 720 struct pollfd fdmaskp[1]; 721 722 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 723 if (maxwait != 0) { 724 last = timespec_to_sec(&clear_cache) + maxwait; 725 d_last = 0; 726 } else { 727 last = 0; 728 d_last = 365*24*60*60; 729 } 730 731 do { 732 clock_gettime(CLOCK_MONOTONIC, &now); 733 734 if (last != 0) 735 d_last = last - timespec_to_sec(&now); 736 737 if (ntransmitted < npackets && d_last > 0) { 738 /* send if within 100 usec or late for next packet */ 739 sec = diffsec(&next_tx, &now); 740 if (sec <= 0.0001 || 741 (lastrcvd && (pingflags & F_FLOOD))) { 742 pinger(); 743 sec = diffsec(&next_tx, &now); 744 } 745 if (sec < 0.0) 746 sec = 0.0; 747 if (d_last < sec) 748 sec = d_last; 749 750 } else { 751 /* For the last response, wait twice as long as the 752 * worst case seen, or 10 times as long as the 753 * maximum interpacket interval, whichever is longer. 754 */ 755 sec = MAX(2 * tmax, 10 * interval) - 756 diffsec(&now, &last_tx); 757 if (d_last < sec) 758 sec = d_last; 759 if (sec <= 0) 760 break; 761 } 762 763 764 fdmaskp[0].fd = s; 765 fdmaskp[0].events = POLLIN; 766 767 enablesignals(); 768 cc = prog_poll(fdmaskp, 1, (int)(sec * 1000)); 769 blocksignals(); 770 771 if (cc <= 0) { 772 if (cc < 0) { 773 if (errno == EINTR) 774 continue; 775 jiggle_flush(1); 776 err(EXIT_FAILURE, "poll"); 777 } 778 continue; 779 } 780 781 fromlen = sizeof(from); 782 cc = prog_recvfrom(s, (char *) packet, packlen, 783 0, (struct sockaddr *)&from, 784 &fromlen); 785 if (cc < 0) { 786 if (errno != EINTR) { 787 jiggle_flush(1); 788 warn("recvfrom"); 789 (void)fflush(stderr); 790 } 791 continue; 792 } 793 clock_gettime(CLOCK_MONOTONIC, &now); 794 pr_pack(packet, cc, &from); 795 796 } while (nreceived < npackets 797 && (nreceived == 0 || !(pingflags & F_ONCE))); 798 799 finish(0); 800 } 801 802 803 static void 804 jiggle_flush(int nl) /* new line if there are dots */ 805 { 806 int serrno = errno; 807 808 if (jiggle_cnt > 0) { 809 total_jiggled += jiggle_cnt; 810 jiggle_direction = 1; 811 do { 812 (void)putchar('.'); 813 } while (--jiggle_cnt > 0); 814 815 } else if (jiggle_cnt < 0) { 816 total_jiggled -= jiggle_cnt; 817 jiggle_direction = -1; 818 do { 819 (void)putchar('\b'); 820 } while (++jiggle_cnt < 0); 821 } 822 823 if (nl) { 824 if (total_jiggled != 0) 825 (void)putchar('\n'); 826 total_jiggled = 0; 827 jiggle_direction = -1; 828 } 829 830 (void)fflush(stdout); 831 (void)fflush(stderr); 832 jiggle_time = now; 833 errno = serrno; 834 } 835 836 837 /* jiggle the cursor for flood-ping 838 */ 839 static void 840 jiggle(int delta) 841 { 842 double dt; 843 844 if (pingflags & F_QUIET) 845 return; 846 847 /* do not back up into messages */ 848 if (total_jiggled+jiggle_cnt+delta < 0) 849 return; 850 851 jiggle_cnt += delta; 852 853 /* flush the FLOOD dots when things are quiet 854 * or occassionally to make the cursor jiggle. 855 */ 856 dt = diffsec(&last_tx, &jiggle_time); 857 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 858 jiggle_flush(0); 859 } 860 861 862 /* 863 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 864 * will be added on by the kernel. The ID field is our UNIX process ID, 865 * and the sequence number is an ascending integer. The first phdrlen bytes 866 * of the data portion are used to hold a UNIX "timeval" struct in VAX 867 * byte-order, to compute the round-trip time, or a UNIX "timespec" in native 868 * format. 869 */ 870 static void 871 pinger(void) 872 { 873 struct tv32 tv32; 874 int i, cc, sw; 875 876 opack_icmp.icmp_code = 0; 877 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 878 879 /* clear the cached route in the kernel after an ICMP 880 * response such as a Redirect is seen to stop causing 881 * more such packets. Also clear the cached route 882 * periodically in case of routing changes that make 883 * black holes come and go. 884 */ 885 if (clear_cache.tv_sec != now.tv_sec) { 886 opack_icmp.icmp_type = ICMP_ECHOREPLY; 887 opack_icmp.icmp_id = ~ident; 888 opack_icmp.icmp_cksum = 0; 889 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 890 phdrlen); 891 sw = 0; 892 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 893 (char *)&sw, sizeof(sw)) < 0) 894 err(EXIT_FAILURE, "Can't turn off special IP header"); 895 if (prog_sendto(sloop, (char *) &opack_icmp, 896 ICMP_MINLEN, MSG_DONTROUTE, 897 (struct sockaddr *)&loc_addr, 898 sizeof(struct sockaddr_in)) < 0) { 899 /* 900 * XXX: we only report this as a warning in verbose 901 * mode because people get confused when they see 902 * this error when they are running in single user 903 * mode and they have not configured lo0 904 */ 905 if (pingflags & F_VERBOSE) 906 warn("failed to clear cached route"); 907 } 908 sw = 1; 909 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 910 (char *)&sw, sizeof(sw)) < 0) 911 err(EXIT_FAILURE, "Can't set special IP header"); 912 913 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 914 } 915 916 opack_icmp.icmp_type = ICMP_ECHO; 917 opack_icmp.icmp_id = ident; 918 919 if (pingflags & F_TIMING) { 920 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 921 tv32.tv32_usec = htonl(now.tv_nsec / 1000); 922 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 923 } else if (pingflags & F_TIMING64) 924 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 925 926 cc = MAX(datalen, ICMP_MINLEN) + PHDR_LEN; 927 opack_icmp.icmp_cksum = 0; 928 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 929 930 cc += opack_ip->ip_hl<<2; 931 opack_ip->ip_len = cc; 932 i = prog_sendto(s, (char *) opack_ip, cc, 0, 933 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 934 if (i != cc) { 935 jiggle_flush(1); 936 if (i < 0) 937 warn("sendto"); 938 else 939 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 940 (void)fflush(stderr); 941 } 942 lastrcvd = 0; 943 944 CLR(ntransmitted); 945 ntransmitted++; 946 947 last_tx = now; 948 if (next_tx.tv_sec == 0) { 949 first_tx = now; 950 next_tx = now; 951 } 952 953 /* Transmit regularly, at always the same microsecond in the 954 * second when going at one packet per second. 955 * If we are at most 100 ms behind, send extras to get caught up. 956 * Otherwise, skip packets we were too slow to send. 957 */ 958 if (diffsec(&next_tx, &now) <= interval) { 959 do { 960 timespecadd(&next_tx, &interval_tv, &next_tx); 961 } while (diffsec(&next_tx, &now) < -0.1); 962 } 963 964 if (pingflags & F_FLOOD) 965 jiggle(1); 966 967 /* While the packet is going out, ready buffer for the next 968 * packet. Use a fast but not very good random number generator. 969 */ 970 if (pingflags & F_PING_RANDOM) 971 rnd_fill(); 972 } 973 974 975 static void 976 pr_pack_sub(int cc, 977 char *addr, 978 int seqno, 979 int dupflag, 980 int ttl, 981 double triptime) 982 { 983 jiggle_flush(1); 984 985 if (pingflags & F_FLOOD) 986 return; 987 988 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 989 if (dupflag) 990 (void)printf(" DUP!"); 991 (void)printf(" ttl=%d", ttl); 992 if (pingflags & (F_TIMING|F_TIMING64)) { 993 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 994 995 (void)printf(" time=%.*f ms", prec, triptime*1000.0); 996 } 997 998 /* 999 * Send beep to stderr, since that's more likely than stdout 1000 * to go to a terminal.. 1001 */ 1002 if (pingflags & F_AUDIBLE && !dupflag) 1003 (void)fprintf(stderr,"\a"); 1004 } 1005 1006 1007 /* 1008 * Print out the packet, if it came from us. This logic is necessary 1009 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1010 * which arrive ('tis only fair). This permits multiple copies of this 1011 * program to be run without having intermingled output (or statistics!). 1012 */ 1013 static void 1014 pr_pack(u_char *buf, 1015 int tot_len, 1016 struct sockaddr_in *from) 1017 { 1018 struct ip *ip; 1019 struct icmp *icp; 1020 int i, j, net_len; 1021 u_char *cp; 1022 static int old_rrlen; 1023 static char old_rr[MAX_IPOPTLEN]; 1024 int hlen, dupflag = 0, dumped; 1025 double triptime = 0.0; 1026 #define PR_PACK_SUB() {if (!dumped) { \ 1027 dumped = 1; \ 1028 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 1029 ntohs((u_int16_t)icp->icmp_seq), \ 1030 dupflag, ip->ip_ttl, triptime);}} 1031 1032 /* Check the IP header */ 1033 ip = (struct ip *) buf; 1034 hlen = ip->ip_hl << 2; 1035 if (tot_len < hlen + ICMP_MINLEN) { 1036 if (pingflags & F_VERBOSE) { 1037 jiggle_flush(1); 1038 (void)printf("packet too short (%d bytes) from %s\n", 1039 tot_len, inet_ntoa(from->sin_addr)); 1040 } 1041 return; 1042 } 1043 1044 /* Now the ICMP part */ 1045 dumped = 0; 1046 net_len = tot_len - hlen; 1047 icp = (struct icmp *)(buf + hlen); 1048 if (icp->icmp_type == ICMP_ECHOREPLY 1049 && icp->icmp_id == ident) { 1050 1051 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 1052 lastrcvd = 1; 1053 last_rx = now; 1054 if (first_rx.tv_sec == 0) 1055 first_rx = last_rx; 1056 nreceived++; 1057 if (pingflags & (F_TIMING|F_TIMING64)) { 1058 struct timespec tv; 1059 1060 if (pingflags & F_TIMING) { 1061 struct tv32 tv32; 1062 1063 (void)memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1064 tv.tv_sec = (uint32_t)ntohl(tv32.tv32_sec); 1065 tv.tv_nsec = ntohl(tv32.tv32_usec) * 1000; 1066 } else if (pingflags & F_TIMING64) 1067 (void)memcpy(&tv, icp->icmp_data, sizeof(tv)); 1068 else 1069 memset(&tv, 0, sizeof(tv)); /* XXX: gcc */ 1070 1071 triptime = diffsec(&last_rx, &tv); 1072 tsum += triptime; 1073 tsumsq += triptime * triptime; 1074 if (triptime < tmin) 1075 tmin = triptime; 1076 if (triptime > tmax) 1077 tmax = triptime; 1078 } 1079 1080 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1081 nrepeats++, nreceived--; 1082 dupflag=1; 1083 } else { 1084 SET(ntohs((u_int16_t)icp->icmp_seq)); 1085 } 1086 1087 if (tot_len != opack_ip->ip_len) { 1088 PR_PACK_SUB(); 1089 switch (opack_ip->ip_len - tot_len) { 1090 case MAX_IPOPTLEN: 1091 if ((pongflags & F_RECORD_ROUTE) != 0) 1092 break; 1093 if ((pingflags & F_RECORD_ROUTE) == 0) 1094 goto out; 1095 pongflags |= F_RECORD_ROUTE; 1096 (void)printf("\nremote host does not " 1097 "support record route"); 1098 break; 1099 case 8: 1100 if ((pongflags & F_SOURCE_ROUTE) != 0) 1101 break; 1102 if ((pingflags & F_SOURCE_ROUTE) == 0) 1103 goto out; 1104 pongflags |= F_SOURCE_ROUTE; 1105 (void)printf("\nremote host does not " 1106 "support source route"); 1107 break; 1108 default: 1109 out: 1110 (void)printf("\nwrong total length %d " 1111 "instead of %d", tot_len, opack_ip->ip_len); 1112 break; 1113 } 1114 } 1115 1116 if (!dupflag) { 1117 static u_int16_t last_seqno = 0xffff; 1118 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1119 u_int16_t gap = seqno - (last_seqno + 1); 1120 if (gap > 0 && gap < 0x8000 && 1121 (pingflags & F_VERBOSE)) { 1122 (void)printf("[*** sequence gap of %u " 1123 "packets from %u ... %u ***]\n", gap, 1124 (u_int16_t) (last_seqno + 1), 1125 (u_int16_t) (seqno - 1)); 1126 if (pingflags & F_QUIET) 1127 summary(0); 1128 } 1129 1130 if (gap < 0x8000) 1131 last_seqno = seqno; 1132 } 1133 1134 if (pingflags & F_QUIET) 1135 return; 1136 1137 if (!(pingflags & F_FLOOD)) 1138 PR_PACK_SUB(); 1139 1140 /* check the data */ 1141 if ((size_t)(tot_len - hlen) > 1142 offsetof(struct icmp, icmp_data) + datalen 1143 && !(pingflags & F_PING_RANDOM) 1144 && memcmp(icp->icmp_data + phdrlen, 1145 opack_icmp.icmp_data + phdrlen, 1146 datalen - phdrlen)) { 1147 for (i = phdrlen; i < datalen; i++) { 1148 if (icp->icmp_data[i] != 1149 opack_icmp.icmp_data[i]) 1150 break; 1151 } 1152 PR_PACK_SUB(); 1153 (void)printf("\nwrong data byte #%d should have been" 1154 " %#x but was %#x", i - phdrlen, 1155 (u_char)opack_icmp.icmp_data[i], 1156 (u_char)icp->icmp_data[i]); 1157 for (i = phdrlen; i < datalen; i++) { 1158 if ((i % 16) == 0) 1159 (void)printf("\n\t"); 1160 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1161 } 1162 } 1163 1164 } else { 1165 if (!pr_icmph(icp, from, net_len)) 1166 return; 1167 dumped = 2; 1168 } 1169 1170 /* Display any IP options */ 1171 cp = buf + sizeof(struct ip); 1172 while (hlen > (int)sizeof(struct ip)) { 1173 switch (*cp) { 1174 case IPOPT_EOL: 1175 hlen = 0; 1176 break; 1177 case IPOPT_LSRR: 1178 hlen -= 2; 1179 j = *++cp; 1180 ++cp; 1181 j -= IPOPT_MINOFF; 1182 if (j <= 0) 1183 continue; 1184 if (dumped <= 1) { 1185 j = ((j+3)/4)*4; 1186 hlen -= j; 1187 cp += j; 1188 break; 1189 } 1190 PR_PACK_SUB(); 1191 (void)printf("\nLSRR: "); 1192 for (;;) { 1193 pr_saddr(cp); 1194 cp += 4; 1195 hlen -= 4; 1196 j -= 4; 1197 if (j <= 0) 1198 break; 1199 (void)putchar('\n'); 1200 } 1201 break; 1202 case IPOPT_RR: 1203 j = *++cp; /* get length */ 1204 i = *++cp; /* and pointer */ 1205 hlen -= 2; 1206 if (i > j) 1207 i = j; 1208 i -= IPOPT_MINOFF; 1209 if (i <= 0) 1210 continue; 1211 if (dumped <= 1) { 1212 if (i == old_rrlen 1213 && !memcmp(cp, old_rr, i)) { 1214 if (dumped) 1215 (void)printf("\t(same route)"); 1216 j = ((i+3)/4)*4; 1217 hlen -= j; 1218 cp += j; 1219 break; 1220 } 1221 old_rrlen = i; 1222 (void) memcpy(old_rr, cp, i); 1223 } 1224 if (!dumped) { 1225 jiggle_flush(1); 1226 (void)printf("RR: "); 1227 dumped = 1; 1228 } else { 1229 (void)printf("\nRR: "); 1230 } 1231 for (;;) { 1232 pr_saddr(cp); 1233 cp += 4; 1234 hlen -= 4; 1235 i -= 4; 1236 if (i <= 0) 1237 break; 1238 (void)putchar('\n'); 1239 } 1240 break; 1241 case IPOPT_NOP: 1242 if (dumped <= 1) 1243 break; 1244 PR_PACK_SUB(); 1245 (void)printf("\nNOP"); 1246 break; 1247 #ifdef sgi 1248 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1249 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1250 case IPOPT_CIPSO: /* Commercial IPSO */ 1251 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1252 i = (unsigned)cp[1]; 1253 hlen -= i - 1; 1254 PR_PACK_SUB(); 1255 (void)printf("\nSEC:"); 1256 while (i--) { 1257 (void)printf(" %02x", *cp++); 1258 } 1259 cp--; 1260 break; 1261 } 1262 #endif 1263 default: 1264 PR_PACK_SUB(); 1265 (void)printf("\nunknown option 0x%x", *cp); 1266 break; 1267 } 1268 hlen--; 1269 cp++; 1270 } 1271 1272 if (dumped) { 1273 (void)putchar('\n'); 1274 (void)fflush(stdout); 1275 } else { 1276 jiggle(-1); 1277 } 1278 } 1279 1280 1281 /* Compute the IP checksum 1282 * This assumes the packet is less than 32K long. 1283 */ 1284 static u_int16_t 1285 in_cksum(u_int16_t *p, u_int len) 1286 { 1287 u_int32_t sum = 0; 1288 int nwords = len >> 1; 1289 1290 while (nwords-- != 0) 1291 sum += *p++; 1292 1293 if (len & 1) { 1294 union { 1295 u_int16_t w; 1296 u_int8_t c[2]; 1297 } u; 1298 u.c[0] = *(u_char *)p; 1299 u.c[1] = 0; 1300 sum += u.w; 1301 } 1302 1303 /* end-around-carry */ 1304 sum = (sum >> 16) + (sum & 0xffff); 1305 sum += (sum >> 16); 1306 return (~sum); 1307 } 1308 1309 1310 /* 1311 * compute the difference of two timespecs in seconds 1312 */ 1313 static double 1314 diffsec(struct timespec *timenow, 1315 struct timespec *then) 1316 { 1317 if (timenow->tv_sec == 0) 1318 return -1; 1319 return (timenow->tv_sec - then->tv_sec) 1320 * 1.0 + (timenow->tv_nsec - then->tv_nsec) / 1000000000.0; 1321 } 1322 1323 1324 #if 0 1325 static void 1326 timespecadd(struct timespec *t1, 1327 struct timespec *t2) 1328 { 1329 1330 t1->tv_sec += t2->tv_sec; 1331 if ((t1->tv_nsec += t2->tv_nsec) >= 1000000000) { 1332 t1->tv_sec++; 1333 t1->tv_nsec -= 1000000000; 1334 } 1335 } 1336 #endif 1337 1338 1339 static void 1340 sec_to_timespec(const double sec, struct timespec *tp) 1341 { 1342 tp->tv_sec = sec; 1343 tp->tv_nsec = (sec - tp->tv_sec) * 1000000000.0; 1344 } 1345 1346 1347 static double 1348 timespec_to_sec(const struct timespec *tp) 1349 { 1350 return tp->tv_sec + tp->tv_nsec / 1000000000.0; 1351 } 1352 1353 1354 /* 1355 * Print statistics. 1356 * Heavily buffered STDIO is used here, so that all the statistics 1357 * will be written with 1 sys-write call. This is nice when more 1358 * than one copy of the program is running on a terminal; it prevents 1359 * the statistics output from becomming intermingled. 1360 */ 1361 static void 1362 summary(int header) 1363 { 1364 jiggle_flush(1); 1365 1366 if (header) 1367 (void)printf("\n----%s PING Statistics----\n", hostname); 1368 (void)printf("%d packets transmitted, ", ntransmitted); 1369 (void)printf("%d packets received, ", nreceived); 1370 if (nrepeats) 1371 (void)printf("+%d duplicates, ", nrepeats); 1372 if (ntransmitted) { 1373 if (nreceived > ntransmitted) 1374 (void)printf("-- somebody's duplicating packets!"); 1375 else 1376 (void)printf("%.1f%% packet loss", 1377 (((ntransmitted-nreceived)*100.0) / 1378 ntransmitted)); 1379 } 1380 (void)printf("\n"); 1381 if (nreceived && (pingflags & (F_TIMING|F_TIMING64))) { 1382 double n = nreceived + nrepeats; 1383 double avg = (tsum / n); 1384 double variance = 0.0; 1385 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 1386 if (n>1) 1387 variance = (tsumsq - n*avg*avg) /(n-1); 1388 1389 (void)printf("round-trip min/avg/max/stddev = " 1390 "%.*f/%.*f/%.*f/%.*f ms\n", 1391 prec, tmin * 1000.0, 1392 prec, avg * 1000.0, 1393 prec, tmax * 1000.0, 1394 prec, sqrt(variance) * 1000.0); 1395 if (pingflags & F_FLOOD) { 1396 double r = diffsec(&last_rx, &first_rx); 1397 double t = diffsec(&last_tx, &first_tx); 1398 if (r == 0) 1399 r = 0.0001; 1400 if (t == 0) 1401 t = 0.0001; 1402 (void)printf(" %.1f packets/sec sent, " 1403 " %.1f packets/sec received\n", 1404 ntransmitted/t, nreceived/r); 1405 } 1406 } 1407 } 1408 1409 1410 /* 1411 * Print statistics when SIGINFO is received. 1412 */ 1413 /* ARGSUSED */ 1414 static void 1415 prtsig(int dummy) 1416 { 1417 1418 summary(0); 1419 #ifndef SIGINFO 1420 (void)signal(SIGQUIT, prtsig); 1421 #endif 1422 } 1423 1424 1425 /* 1426 * On the first SIGINT, allow any outstanding packets to dribble in 1427 */ 1428 static void 1429 prefinish(int sig) 1430 { 1431 if (lastrcvd /* quit now if caught up */ 1432 || nreceived == 0) /* or if remote is dead */ 1433 finish(0); 1434 1435 (void)signal(sig, finish); /* do this only the 1st time */ 1436 1437 if (npackets > ntransmitted) /* let the normal limit work */ 1438 npackets = ntransmitted; 1439 } 1440 1441 /* 1442 * Print statistics and give up. 1443 */ 1444 /* ARGSUSED */ 1445 static void 1446 finish(int dummy) 1447 { 1448 #ifdef SIGINFO 1449 (void)signal(SIGINFO, SIG_DFL); 1450 #else 1451 (void)signal(SIGQUIT, SIG_DFL); 1452 #endif 1453 1454 summary(1); 1455 exit(nreceived > 0 ? 0 : 2); 1456 } 1457 1458 static void 1459 blocksignals(void) 1460 { 1461 if (sigprocmask(SIG_SETMASK, &blockmask, NULL) == -1) { 1462 err(EXIT_FAILURE, "blocksignals: sigprocmask"); 1463 } 1464 } 1465 1466 static void 1467 enablesignals(void) 1468 { 1469 if (sigprocmask(SIG_SETMASK, &enablemask, NULL) == -1) { 1470 err(EXIT_FAILURE, "enablesignals: sigprocmask"); 1471 } 1472 } 1473 1474 1475 static int /* 0=do not print it */ 1476 ck_pr_icmph(struct icmp *icp, 1477 struct sockaddr_in *from, 1478 int cc, 1479 int override) /* 1=override VERBOSE if interesting */ 1480 { 1481 int hlen; 1482 struct ip ipb, *ip = &ipb; 1483 struct icmp icp2b, *icp2 = &icp2b; 1484 int res; 1485 1486 if (pingflags & F_VERBOSE) { 1487 res = 1; 1488 jiggle_flush(1); 1489 } else { 1490 res = 0; 1491 } 1492 1493 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1494 hlen = ip->ip_hl << 2; 1495 if (ip->ip_p == IPPROTO_ICMP 1496 && hlen + 6 <= cc) { 1497 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1498 if (icp2->icmp_id == ident) { 1499 /* remember to clear route cached in kernel 1500 * if this non-Echo-Reply ICMP message was for one 1501 * of our packets. 1502 */ 1503 clear_cache.tv_sec = 0; 1504 1505 if (!res && override 1506 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1507 jiggle_flush(1); 1508 (void)printf("%d bytes from %s: ", 1509 cc, pr_addr(&from->sin_addr)); 1510 res = 1; 1511 } 1512 } 1513 } 1514 1515 return res; 1516 } 1517 1518 1519 /* 1520 * Print a descriptive string about an ICMP header other than an echo reply. 1521 */ 1522 static int /* 0=printed nothing */ 1523 pr_icmph(struct icmp *icp, 1524 struct sockaddr_in *from, 1525 int cc) 1526 { 1527 switch (icp->icmp_type ) { 1528 case ICMP_UNREACH: 1529 if (!ck_pr_icmph(icp, from, cc, 1)) 1530 return 0; 1531 switch (icp->icmp_code) { 1532 case ICMP_UNREACH_NET: 1533 (void)printf("Destination Net Unreachable"); 1534 break; 1535 case ICMP_UNREACH_HOST: 1536 (void)printf("Destination Host Unreachable"); 1537 break; 1538 case ICMP_UNREACH_PROTOCOL: 1539 (void)printf("Destination Protocol Unreachable"); 1540 break; 1541 case ICMP_UNREACH_PORT: 1542 (void)printf("Destination Port Unreachable"); 1543 break; 1544 case ICMP_UNREACH_NEEDFRAG: 1545 (void)printf("frag needed and DF set. Next MTU=%d", 1546 ntohs(icp->icmp_nextmtu)); 1547 break; 1548 case ICMP_UNREACH_SRCFAIL: 1549 (void)printf("Source Route Failed"); 1550 break; 1551 case ICMP_UNREACH_NET_UNKNOWN: 1552 (void)printf("Unreachable unknown net"); 1553 break; 1554 case ICMP_UNREACH_HOST_UNKNOWN: 1555 (void)printf("Unreachable unknown host"); 1556 break; 1557 case ICMP_UNREACH_ISOLATED: 1558 (void)printf("Unreachable host isolated"); 1559 break; 1560 case ICMP_UNREACH_NET_PROHIB: 1561 (void)printf("Net prohibited access"); 1562 break; 1563 case ICMP_UNREACH_HOST_PROHIB: 1564 (void)printf("Host prohibited access"); 1565 break; 1566 case ICMP_UNREACH_TOSNET: 1567 (void)printf("Bad TOS for net"); 1568 break; 1569 case ICMP_UNREACH_TOSHOST: 1570 (void)printf("Bad TOS for host"); 1571 break; 1572 case 13: 1573 (void)printf("Communication prohibited"); 1574 break; 1575 case 14: 1576 (void)printf("Host precedence violation"); 1577 break; 1578 case 15: 1579 (void)printf("Precedence cutoff"); 1580 break; 1581 default: 1582 (void)printf("Bad Destination Unreachable Code: %d", 1583 icp->icmp_code); 1584 break; 1585 } 1586 /* Print returned IP header information */ 1587 pr_retip(icp, cc); 1588 break; 1589 1590 case ICMP_SOURCEQUENCH: 1591 if (!ck_pr_icmph(icp, from, cc, 1)) 1592 return 0; 1593 (void)printf("Source Quench"); 1594 pr_retip(icp, cc); 1595 break; 1596 1597 case ICMP_REDIRECT: 1598 if (!ck_pr_icmph(icp, from, cc, 1)) 1599 return 0; 1600 switch (icp->icmp_code) { 1601 case ICMP_REDIRECT_NET: 1602 (void)printf("Redirect Network"); 1603 break; 1604 case ICMP_REDIRECT_HOST: 1605 (void)printf("Redirect Host"); 1606 break; 1607 case ICMP_REDIRECT_TOSNET: 1608 (void)printf("Redirect Type of Service and Network"); 1609 break; 1610 case ICMP_REDIRECT_TOSHOST: 1611 (void)printf("Redirect Type of Service and Host"); 1612 break; 1613 default: 1614 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1615 break; 1616 } 1617 (void)printf(" New router addr: %s", 1618 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1619 pr_retip(icp, cc); 1620 break; 1621 1622 case ICMP_ECHO: 1623 if (!ck_pr_icmph(icp, from, cc, 0)) 1624 return 0; 1625 (void)printf("Echo Request: ID=%d seq=%d", 1626 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1627 break; 1628 1629 case ICMP_ECHOREPLY: 1630 /* displaying other's pings is too noisey */ 1631 #if 0 1632 if (!ck_pr_icmph(icp, from, cc, 0)) 1633 return 0; 1634 (void)printf("Echo Reply: ID=%d seq=%d", 1635 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1636 break; 1637 #else 1638 return 0; 1639 #endif 1640 1641 case ICMP_ROUTERADVERT: 1642 if (!ck_pr_icmph(icp, from, cc, 0)) 1643 return 0; 1644 (void)printf("Router Discovery Advert"); 1645 break; 1646 1647 case ICMP_ROUTERSOLICIT: 1648 if (!ck_pr_icmph(icp, from, cc, 0)) 1649 return 0; 1650 (void)printf("Router Discovery Solicit"); 1651 break; 1652 1653 case ICMP_TIMXCEED: 1654 if (!ck_pr_icmph(icp, from, cc, 1)) 1655 return 0; 1656 switch (icp->icmp_code ) { 1657 case ICMP_TIMXCEED_INTRANS: 1658 (void)printf("Time To Live exceeded"); 1659 break; 1660 case ICMP_TIMXCEED_REASS: 1661 (void)printf("Frag reassembly time exceeded"); 1662 break; 1663 default: 1664 (void)printf("Time exceeded, Bad Code: %d", 1665 icp->icmp_code); 1666 break; 1667 } 1668 pr_retip(icp, cc); 1669 break; 1670 1671 case ICMP_PARAMPROB: 1672 if (!ck_pr_icmph(icp, from, cc, 1)) 1673 return 0; 1674 (void)printf("Parameter problem: pointer = 0x%02x", 1675 icp->icmp_hun.ih_pptr); 1676 pr_retip(icp, cc); 1677 break; 1678 1679 case ICMP_TSTAMP: 1680 if (!ck_pr_icmph(icp, from, cc, 0)) 1681 return 0; 1682 (void)printf("Timestamp"); 1683 break; 1684 1685 case ICMP_TSTAMPREPLY: 1686 if (!ck_pr_icmph(icp, from, cc, 0)) 1687 return 0; 1688 (void)printf("Timestamp Reply"); 1689 break; 1690 1691 case ICMP_IREQ: 1692 if (!ck_pr_icmph(icp, from, cc, 0)) 1693 return 0; 1694 (void)printf("Information Request"); 1695 break; 1696 1697 case ICMP_IREQREPLY: 1698 if (!ck_pr_icmph(icp, from, cc, 0)) 1699 return 0; 1700 (void)printf("Information Reply"); 1701 break; 1702 1703 case ICMP_MASKREQ: 1704 if (!ck_pr_icmph(icp, from, cc, 0)) 1705 return 0; 1706 (void)printf("Address Mask Request"); 1707 break; 1708 1709 case ICMP_MASKREPLY: 1710 if (!ck_pr_icmph(icp, from, cc, 0)) 1711 return 0; 1712 (void)printf("Address Mask Reply"); 1713 break; 1714 1715 default: 1716 if (!ck_pr_icmph(icp, from, cc, 0)) 1717 return 0; 1718 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1719 if (pingflags & F_VERBOSE) 1720 pr_iph(icp, cc); 1721 } 1722 1723 return 1; 1724 } 1725 1726 1727 /* 1728 * Print an IP header with options. 1729 */ 1730 static void 1731 pr_iph(struct icmp *icp, 1732 int cc) 1733 { 1734 int hlen; 1735 u_char *cp; 1736 struct ip ipb, *ip = &ipb; 1737 1738 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1739 1740 hlen = ip->ip_hl << 2; 1741 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1742 1743 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1744 (void)printf(" %1x %1x %02x %04x %04x", 1745 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1746 (void)printf(" %1x %04x", 1747 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1748 (void)printf(" %02x %02x %04x", 1749 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1750 (void)printf(" %15s ", 1751 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1752 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1753 /* dump any option bytes */ 1754 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1755 (void)printf("%02x", *cp++); 1756 } 1757 } 1758 1759 /* 1760 * Print an ASCII host address starting from a string of bytes. 1761 */ 1762 static void 1763 pr_saddr(u_char *cp) 1764 { 1765 n_long l; 1766 struct in_addr addr; 1767 1768 l = (u_char)*++cp; 1769 l = (l<<8) + (u_char)*++cp; 1770 l = (l<<8) + (u_char)*++cp; 1771 l = (l<<8) + (u_char)*++cp; 1772 addr.s_addr = htonl(l); 1773 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1774 } 1775 1776 1777 /* 1778 * Return an ASCII host address 1779 * as a dotted quad and optionally with a hostname 1780 */ 1781 static char * 1782 pr_addr(struct in_addr *addr) /* in network order */ 1783 { 1784 struct hostent *hp; 1785 static char buf[MAXHOSTNAMELEN+4+16+1]; 1786 1787 if ((pingflags & F_NUMERIC) 1788 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1789 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1790 } else { 1791 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1792 inet_ntoa(*addr)); 1793 } 1794 1795 return buf; 1796 } 1797 1798 /* 1799 * Dump some info on a returned (via ICMP) IP packet. 1800 */ 1801 static void 1802 pr_retip(struct icmp *icp, 1803 int cc) 1804 { 1805 int hlen; 1806 u_char *cp; 1807 struct ip ipb, *ip = &ipb; 1808 1809 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1810 1811 if (pingflags & F_VERBOSE) 1812 pr_iph(icp, cc); 1813 1814 hlen = ip->ip_hl << 2; 1815 cp = (u_char *) &icp->icmp_data[hlen]; 1816 1817 if (ip->ip_p == IPPROTO_TCP) { 1818 if (pingflags & F_VERBOSE) 1819 (void)printf("\n TCP: from port %u, to port %u", 1820 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1821 } else if (ip->ip_p == IPPROTO_UDP) { 1822 if (pingflags & F_VERBOSE) 1823 (void)printf("\n UDP: from port %u, to port %u", 1824 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1825 } else if (ip->ip_p == IPPROTO_ICMP) { 1826 struct icmp icp2; 1827 (void) memcpy(&icp2, cp, sizeof(icp2)); 1828 if (icp2.icmp_type == ICMP_ECHO) { 1829 if (pingflags & F_VERBOSE) 1830 (void)printf("\n ID=%u icmp_seq=%u", 1831 ntohs((u_int16_t)icp2.icmp_id), 1832 ntohs((u_int16_t)icp2.icmp_seq)); 1833 else 1834 (void)printf(" for icmp_seq=%u", 1835 ntohs((u_int16_t)icp2.icmp_seq)); 1836 } 1837 } 1838 } 1839 1840 static void 1841 fill(void) 1842 { 1843 int i, j, k; 1844 char *cp; 1845 int pat[16]; 1846 1847 for (cp = fill_pat; *cp != '\0'; cp++) { 1848 if (!isxdigit((unsigned char)*cp)) 1849 break; 1850 } 1851 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1852 (void)fflush(stdout); 1853 errx(EXIT_FAILURE, "\"-p %s\": patterns must be specified with" 1854 " 1-32 hex digits\n", 1855 fill_pat); 1856 } 1857 1858 i = sscanf(fill_pat, 1859 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1860 &pat[0], &pat[1], &pat[2], &pat[3], 1861 &pat[4], &pat[5], &pat[6], &pat[7], 1862 &pat[8], &pat[9], &pat[10], &pat[11], 1863 &pat[12], &pat[13], &pat[14], &pat[15]); 1864 1865 for (k = phdrlen, j = 0; k < datalen; k++) { 1866 opack_icmp.icmp_data[k] = pat[j]; 1867 if (++j >= i) 1868 j = 0; 1869 } 1870 1871 if (!(pingflags & F_QUIET)) { 1872 (void)printf("PATTERN: 0x"); 1873 for (j=0; j<i; j++) 1874 (void)printf("%02x", 1875 (u_char)opack_icmp.icmp_data[phdrlen + j]); 1876 (void)printf("\n"); 1877 } 1878 1879 } 1880 1881 1882 static void 1883 rnd_fill(void) 1884 { 1885 static u_int32_t rnd; 1886 int i; 1887 1888 for (i = phdrlen; i < datalen; i++) { 1889 rnd = (3141592621U * rnd + 663896637U); 1890 opack_icmp.icmp_data[i] = rnd>>24; 1891 } 1892 } 1893 1894 1895 static void 1896 gethost(const char *arg, 1897 const char *name, 1898 struct sockaddr_in *sa, 1899 char *realname, 1900 int realname_len) 1901 { 1902 struct hostent *hp; 1903 1904 (void)memset(sa, 0, sizeof(*sa)); 1905 sa->sin_family = AF_INET; 1906 sa->sin_len = sizeof(struct sockaddr_in); 1907 1908 /* If it is an IP address, try to convert it to a name to 1909 * have something nice to display. 1910 */ 1911 if (inet_aton(name, &sa->sin_addr) != 0) { 1912 if (realname) { 1913 if (pingflags & F_NUMERIC) 1914 hp = 0; 1915 else 1916 hp = gethostbyaddr((char *)&sa->sin_addr, 1917 sizeof(sa->sin_addr), AF_INET); 1918 (void)strlcpy(realname, hp ? hp->h_name : name, 1919 realname_len); 1920 } 1921 return; 1922 } 1923 1924 hp = gethostbyname(name); 1925 if (!hp) 1926 errx(EXIT_FAILURE, "Cannot resolve \"%s\" (%s)", 1927 name, hstrerror(h_errno)); 1928 1929 if (hp->h_addrtype != AF_INET) 1930 errx(EXIT_FAILURE, "%s only supported with IP", arg); 1931 1932 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1933 1934 if (realname) 1935 (void)strlcpy(realname, hp->h_name, realname_len); 1936 } 1937 1938 1939 static void 1940 usage(void) 1941 { 1942 #ifdef IPSEC 1943 #ifdef IPSEC_POLICY_IPSEC 1944 #define IPSECOPT "\n [-E policy] " 1945 #else 1946 #define IPSECOPT "\n [-AE] " 1947 #endif /*IPSEC_POLICY_IPSEC*/ 1948 #else 1949 #define IPSECOPT "" 1950 #endif /*IPSEC*/ 1951 1952 (void)fprintf(stderr, "usage: \n" 1953 "%s [-aCDdfLnoPQqRrv] [-c count] [-g gateway] [-h host]" 1954 " [-I addr] [-i interval]\n" 1955 " [-l preload] [-p pattern] [-s size] [-T ttl] [-t tos]" 1956 " [-w maxwait] " IPSECOPT "host\n", 1957 getprogname()); 1958 exit(1); 1959 } 1960
Indexes created Tue Sep 30 20:09:53 GMT 2025