ping.c revision 1.113
1 /* $NetBSD: ping.c,v 1.113 2016/12/18 00:21:33 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 1.113 2016/12/18 00:21:33 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 uint8_t 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 l = strtol(optarg, &p, 0); 299 if (*p != '\0' || l <= 0) 300 errx(EXIT_FAILURE, 301 "Bad/invalid number of packets: %s", 302 optarg); 303 #if INT_MAX < LONG_MAX 304 if (l > INT_MAX) 305 errx(EXIT_FAILURE, 306 "Too many packets to count: %ld", l); 307 #endif 308 npackets = l; 309 break; 310 case 'D': 311 pingflags |= F_DF; 312 break; 313 case 'd': 314 options |= SO_DEBUG; 315 break; 316 case 'f': 317 pingflags |= F_FLOOD; 318 break; 319 case 'h': 320 hostind = optind-1; 321 break; 322 case 'i': /* wait between sending packets */ 323 interval = strtod(optarg, &p); 324 if (*p != '\0' || interval <= 0) 325 errx(EXIT_FAILURE, "Bad/invalid interval: %s", 326 optarg); 327 /* 328 * In order to avoid overflowing the microseconds 329 * argument of poll() the interval must be less than 330 * INT_MAX/1000. Limit it to one second less than 331 * that to be safe. 332 */ 333 if (interval >= INT_MAX/1000.0 - 1.0) 334 errx(EXIT_FAILURE, 335 "Timing interval %g too large", interval); 336 break; 337 case 'l': 338 l = strtol(optarg, &p, 0); 339 if (*p != '\0' || l < 0) 340 errx(EXIT_FAILURE, "Bad/invalid preload value: " 341 "%s", optarg); 342 #if INT_MAX < LONG_MAX 343 if (l > INT_MAX) 344 errx(EXIT_FAILURE, 345 "Too many preload packets: %ld", l); 346 #endif 347 preload = l; 348 break; 349 case 'n': 350 pingflags |= F_NUMERIC; 351 break; 352 case 'o': 353 pingflags |= F_ONCE; 354 break; 355 case 'p': /* fill buffer with user pattern */ 356 if (pingflags & F_PING_RANDOM) 357 errx(EXIT_FAILURE, 358 "Only one of -P and -p allowed"); 359 pingflags |= F_PING_FILLED; 360 fill_pat = optarg; 361 break; 362 case 'P': 363 if (pingflags & F_PING_FILLED) 364 errx(EXIT_FAILURE, 365 "Only one of -P and -p allowed"); 366 pingflags |= F_PING_RANDOM; 367 break; 368 case 'q': 369 pingflags |= F_QUIET; 370 break; 371 case 'Q': 372 pingflags |= F_SEMI_QUIET; 373 break; 374 case 'r': 375 options |= SO_DONTROUTE; 376 break; 377 case 's': /* size of packet to send */ 378 l = strtol(optarg, &p, 0); 379 if (*p != '\0' || l < 0) 380 errx(EXIT_FAILURE, 381 "Bad/invalid packet size: %s", optarg); 382 if (l > MAXPACKET) 383 errx(EXIT_FAILURE, "packet size is too large"); 384 len = (int)l; 385 break; 386 case 'v': 387 pingflags |= F_VERBOSE; 388 break; 389 case 'R': 390 pingflags |= F_RECORD_ROUTE; 391 break; 392 case 'L': 393 pingflags |= F_MCAST_NOLOOP; 394 break; 395 case 't': 396 tos = strtoul(optarg, &p, 0); 397 if (*p != '\0' || tos > 0xFF) 398 errx(EXIT_FAILURE, "bad tos value: %s", optarg); 399 break; 400 case 'T': 401 l = strtol(optarg, &p, 0); 402 if (*p != '\0' || l > 255 || l <= 0) 403 errx(EXIT_FAILURE, "ttl out of range: %s", 404 optarg); 405 ttl = (u_char)l; /* cannot check >255 otherwise */ 406 break; 407 case 'I': 408 pingflags |= F_SOURCE_ADDR; 409 gethost("-I", optarg, &src_addr, 0, 0); 410 break; 411 case 'g': 412 pingflags |= F_SOURCE_ROUTE; 413 gethost("-g", optarg, &send_addr, 0, 0); 414 break; 415 case 'w': 416 maxwait = strtod(optarg, &p); 417 if (*p != '\0' || maxwait <= 0) 418 errx(EXIT_FAILURE, "Bad/invalid maxwait time: " 419 "%s", optarg); 420 break; 421 #ifdef IPSEC 422 #ifdef IPSEC_POLICY_IPSEC 423 case 'E': 424 pingflags |= F_POLICY; 425 if (!strncmp("in", optarg, 2)) { 426 policy_in = strdup(optarg); 427 if (!policy_in) 428 err(EXIT_FAILURE, "strdup"); 429 } else if (!strncmp("out", optarg, 3)) { 430 policy_out = strdup(optarg); 431 if (!policy_out) 432 err(EXIT_FAILURE, "strdup"); 433 } else 434 errx(EXIT_FAILURE, "invalid security policy: " 435 "%s", optarg); 436 break; 437 #else 438 case 'A': 439 pingflags |= F_AUTHHDR; 440 break; 441 case 'E': 442 pingflags |= F_ENCRYPT; 443 break; 444 #endif /*IPSEC_POLICY_IPSEC*/ 445 #endif /*IPSEC*/ 446 default: 447 usage(); 448 break; 449 } 450 } 451 452 if (interval == 0) 453 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 454 #ifndef sgi 455 if (pingflags & F_FLOOD && prog_getuid()) 456 errx(EXIT_FAILURE, "Must be superuser to use -f"); 457 if (interval < 1.0 && prog_getuid()) 458 errx(EXIT_FAILURE, "Must be superuser to use < 1 sec " 459 "ping interval"); 460 if (preload > 0 && prog_getuid()) 461 errx(EXIT_FAILURE, "Must be superuser to use -l"); 462 #endif 463 sec_to_timespec(interval, &interval_tv); 464 465 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 466 warnx("Sorry, no audible output for flood pings"); 467 468 if (npackets != 0) { 469 npackets += preload; 470 } else { 471 npackets = INT_MAX; 472 } 473 474 if (hostind == 0) { 475 if (optind != argc-1) 476 usage(); 477 else 478 hostind = optind; 479 } 480 else if (hostind >= argc - 1) 481 usage(); 482 483 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 484 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 485 pingflags |= F_MCAST; 486 if (!(pingflags & F_SOURCE_ROUTE)) 487 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 488 489 loc_addr.sin_family = AF_INET; 490 loc_addr.sin_len = sizeof(struct sockaddr_in); 491 loc_addr.sin_addr.s_addr = htonl((127 << 24) + 1); 492 493 if (len != -1) 494 datalen = len; 495 else 496 datalen = 64 - PHDR_LEN; 497 if (!compat && datalen >= (int)PHDR64_LEN) { /* can we time them? */ 498 pingflags |= F_TIMING64; 499 phdrlen = PHDR64_LEN; 500 } else if (datalen >= (int)PHDR_LEN) { /* can we time them? */ 501 pingflags |= F_TIMING; 502 phdrlen = PHDR_LEN; 503 } else 504 phdrlen = 0; 505 506 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 507 if ((packet = malloc(packlen)) == NULL) 508 err(EXIT_FAILURE, "Can't allocate %d bytes", packlen); 509 510 if (pingflags & F_PING_FILLED) { 511 fill(); 512 } else if (pingflags & F_PING_RANDOM) { 513 rnd_fill(); 514 } else { 515 for (i = phdrlen; i < datalen; i++) 516 opack_icmp.icmp_data[i] = i; 517 } 518 519 ident = arc4random() & 0xFFFF; 520 521 if (options & SO_DEBUG) { 522 if (prog_setsockopt(s, SOL_SOCKET, SO_DEBUG, 523 (char *)&on, sizeof(on)) == -1) 524 warn("Can't turn on socket debugging"); 525 } 526 if (options & SO_DONTROUTE) { 527 if (prog_setsockopt(s, SOL_SOCKET, SO_DONTROUTE, 528 (char *)&on, sizeof(on)) == -1) 529 warn("SO_DONTROUTE"); 530 } 531 532 if (options & SO_DEBUG) { 533 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 534 (char *)&on, sizeof(on)) == -1) 535 warn("Can't turn on socket debugging"); 536 } 537 if (options & SO_DONTROUTE) { 538 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 539 (char *)&on, sizeof(on)) == -1) 540 warn("SO_DONTROUTE"); 541 } 542 543 if (pingflags & F_SOURCE_ROUTE) { 544 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 545 optspace[IPOPT_OLEN] = optlen = 7; 546 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 547 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 548 sizeof(whereto.sin_addr)); 549 optspace[optlen++] = IPOPT_NOP; 550 } 551 if (pingflags & F_RECORD_ROUTE) { 552 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 553 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 554 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 555 optlen = MAX_IPOPTLEN; 556 } 557 /* this leaves opack_ip 0(mod 4) aligned */ 558 opack_ip = (struct ip *)((char *)&out_pack.o_ip 559 + sizeof(out_pack.o_opt) 560 - optlen); 561 (void) memcpy(opack_ip + 1, optspace, optlen); 562 563 if (prog_setsockopt(s, IPPROTO_IP, IP_HDRINCL, 564 (char *) &on, sizeof(on)) < 0) 565 err(EXIT_FAILURE, "Can't set special IP header"); 566 567 opack_ip->ip_v = IPVERSION; 568 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 569 opack_ip->ip_tos = tos; 570 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 571 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 572 opack_ip->ip_p = IPPROTO_ICMP; 573 opack_ip->ip_src = src_addr.sin_addr; 574 opack_ip->ip_dst = send_addr.sin_addr; 575 576 if (pingflags & F_MCAST) { 577 if (pingflags & F_MCAST_NOLOOP) { 578 u_char loop = 0; 579 if (prog_setsockopt(s, IPPROTO_IP, 580 IP_MULTICAST_LOOP, 581 (char *) &loop, 1) < 0) 582 err(EXIT_FAILURE, "Can't disable multicast loopback"); 583 } 584 585 if (ttl != 0 586 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 587 (char *) &ttl, 1) < 0) 588 err(EXIT_FAILURE, "Can't set multicast time-to-live"); 589 590 if ((pingflags & F_SOURCE_ADDR) 591 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 592 (char *) &src_addr.sin_addr, 593 sizeof(src_addr.sin_addr)) < 0) 594 err(EXIT_FAILURE, "Can't set multicast source interface"); 595 596 } else if (pingflags & F_SOURCE_ADDR) { 597 if (prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 598 (char *) &src_addr.sin_addr, 599 sizeof(src_addr.sin_addr)) < 0) 600 err(EXIT_FAILURE, "Can't set source interface/address"); 601 } 602 #ifdef IPSEC 603 #ifdef IPSEC_POLICY_IPSEC 604 { 605 char *buf; 606 if (pingflags & F_POLICY) { 607 if (policy_in != NULL) { 608 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 609 if (buf == NULL) 610 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 611 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 612 buf, ipsec_get_policylen(buf)) < 0) { 613 err(EXIT_FAILURE, "ipsec policy cannot be " 614 "configured"); 615 } 616 free(buf); 617 } 618 if (policy_out != NULL) { 619 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 620 if (buf == NULL) 621 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 622 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 623 buf, ipsec_get_policylen(buf)) < 0) { 624 err(EXIT_FAILURE, "ipsec policy cannot be " 625 "configured"); 626 } 627 free(buf); 628 } 629 } 630 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 631 if (buf == NULL) 632 errx(EXIT_FAILURE, "%s", ipsec_strerror()); 633 if (prog_setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 634 buf, ipsec_get_policylen(buf)) < 0) { 635 #if 0 636 warnx("ipsec is not configured"); 637 #else 638 /* ignore it, should be okay */ 639 #endif 640 } 641 free(buf); 642 } 643 #else 644 { 645 int optval; 646 if (pingflags & F_AUTHHDR) { 647 optval = IPSEC_LEVEL_REQUIRE; 648 #ifdef IP_AUTH_TRANS_LEVEL 649 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 650 (char *)&optval, sizeof(optval)); 651 #else 652 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 653 (char *)&optval, sizeof(optval)); 654 #endif 655 } 656 if (pingflags & F_ENCRYPT) { 657 optval = IPSEC_LEVEL_REQUIRE; 658 (void)prog_setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 659 (char *)&optval, sizeof(optval)); 660 } 661 optval = IPSEC_LEVEL_BYPASS; 662 #ifdef IP_AUTH_TRANS_LEVEL 663 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 664 (char *)&optval, sizeof(optval)); 665 #else 666 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 667 (char *)&optval, sizeof(optval)); 668 #endif 669 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 670 (char *)&optval, sizeof(optval)); 671 } 672 #endif /*IPSEC_POLICY_IPSEC*/ 673 #endif /*IPSEC*/ 674 675 (void)printf("PING %s (%s): %d data bytes\n", hostname, 676 inet_ntoa(whereto.sin_addr), datalen); 677 678 /* When pinging the broadcast address, you can get a lot 679 * of answers. Doing something so evil is useful if you 680 * are trying to stress the ethernet, or just want to 681 * fill the arp cache to get some stuff for /etc/ethers. 682 */ 683 while (0 > prog_setsockopt(s, SOL_SOCKET, SO_RCVBUF, 684 (char*)&bufspace, sizeof(bufspace))) { 685 if ((bufspace -= 4096) <= 0) 686 err(EXIT_FAILURE, "Cannot set the receive buffer size"); 687 } 688 689 /* make it possible to send giant probes, but do not worry now 690 * if it fails, since we probably won't send giant probes. 691 */ 692 (void)prog_setsockopt(s, SOL_SOCKET, SO_SNDBUF, 693 (char*)&bufspace, sizeof(bufspace)); 694 695 (void)signal(SIGINT, prefinish); 696 697 /* 698 * Set up two signal masks: 699 * - blockmask blocks the signals we catch 700 * - enablemask does not 701 */ 702 703 sigemptyset(&enablemask); 704 sigemptyset(&blockmask); 705 sigaddset(&blockmask, SIGINT); 706 #ifdef SIGINFO 707 sigaddset(&blockmask, SIGINFO); 708 #else 709 sigaddset(&blockmask, SIGQUIT); 710 #endif 711 712 #ifdef SIGINFO 713 sa.sa_handler = prtsig; 714 sa.sa_flags = SA_NOKERNINFO; 715 sigemptyset(&sa.sa_mask); 716 (void)sigaction(SIGINFO, &sa, NULL); 717 #else 718 (void)signal(SIGQUIT, prtsig); 719 #endif 720 (void)signal(SIGCONT, prtsig); 721 722 blocksignals(); 723 724 /* fire off them quickies */ 725 for (i = 0; i < preload; i++) { 726 clock_gettime(CLOCK_MONOTONIC, &now); 727 pinger(); 728 } 729 730 doit(); 731 return 0; 732 } 733 734 static void 735 doit(void) 736 { 737 int cc; 738 struct sockaddr_in from; 739 socklen_t fromlen; 740 double sec, last, d_last; 741 struct pollfd fdmaskp[1]; 742 743 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 744 if (maxwait != 0) { 745 last = timespec_to_sec(&clear_cache) + maxwait; 746 d_last = 0; 747 } else { 748 last = 0; 749 d_last = 365*24*60*60; 750 } 751 752 do { 753 clock_gettime(CLOCK_MONOTONIC, &now); 754 755 if (last != 0) 756 d_last = last - timespec_to_sec(&now); 757 758 if (ntransmitted < npackets && d_last > 0) { 759 /* send if within 100 usec or late for next packet */ 760 sec = diffsec(&next_tx, &now); 761 if (sec <= 0.0001 || 762 (lastrcvd && (pingflags & F_FLOOD))) { 763 pinger(); 764 sec = diffsec(&next_tx, &now); 765 } 766 if (sec < 0.0) 767 sec = 0.0; 768 if (d_last < sec) 769 sec = d_last; 770 771 } else { 772 /* For the last response, wait twice as long as the 773 * worst case seen, or 10 times as long as the 774 * maximum interpacket interval, whichever is longer. 775 */ 776 sec = MAX(2 * tmax, 10 * interval) - 777 diffsec(&now, &last_tx); 778 if (d_last < sec) 779 sec = d_last; 780 if (sec <= 0) 781 break; 782 } 783 784 785 fdmaskp[0].fd = s; 786 fdmaskp[0].events = POLLIN; 787 788 enablesignals(); 789 cc = prog_poll(fdmaskp, 1, (int)(sec * 1000)); 790 blocksignals(); 791 792 if (cc <= 0) { 793 if (cc < 0) { 794 if (errno == EINTR) 795 continue; 796 jiggle_flush(1); 797 err(EXIT_FAILURE, "poll"); 798 } 799 continue; 800 } 801 802 fromlen = sizeof(from); 803 cc = prog_recvfrom(s, (char *) packet, packlen, 804 0, (struct sockaddr *)&from, 805 &fromlen); 806 if (cc < 0) { 807 if (errno != EINTR) { 808 jiggle_flush(1); 809 warn("recvfrom"); 810 (void)fflush(stderr); 811 } 812 continue; 813 } 814 clock_gettime(CLOCK_MONOTONIC, &now); 815 pr_pack(packet, cc, &from); 816 817 } while (nreceived < npackets 818 && (nreceived == 0 || !(pingflags & F_ONCE))); 819 820 finish(0); 821 } 822 823 824 static void 825 jiggle_flush(int nl) /* new line if there are dots */ 826 { 827 int serrno = errno; 828 829 if (jiggle_cnt > 0) { 830 total_jiggled += jiggle_cnt; 831 jiggle_direction = 1; 832 do { 833 (void)putchar('.'); 834 } while (--jiggle_cnt > 0); 835 836 } else if (jiggle_cnt < 0) { 837 total_jiggled -= jiggle_cnt; 838 jiggle_direction = -1; 839 do { 840 (void)putchar('\b'); 841 } while (++jiggle_cnt < 0); 842 } 843 844 if (nl) { 845 if (total_jiggled != 0) 846 (void)putchar('\n'); 847 total_jiggled = 0; 848 jiggle_direction = -1; 849 } 850 851 (void)fflush(stdout); 852 (void)fflush(stderr); 853 jiggle_time = now; 854 errno = serrno; 855 } 856 857 858 /* jiggle the cursor for flood-ping 859 */ 860 static void 861 jiggle(int delta) 862 { 863 double dt; 864 865 if (pingflags & F_QUIET) 866 return; 867 868 /* do not back up into messages */ 869 if (total_jiggled+jiggle_cnt+delta < 0) 870 return; 871 872 jiggle_cnt += delta; 873 874 /* flush the FLOOD dots when things are quiet 875 * or occassionally to make the cursor jiggle. 876 */ 877 dt = diffsec(&last_tx, &jiggle_time); 878 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 879 jiggle_flush(0); 880 } 881 882 883 /* 884 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 885 * will be added on by the kernel. The ID field is our UNIX process ID, 886 * and the sequence number is an ascending integer. The first phdrlen bytes 887 * of the data portion are used to hold a UNIX "timeval" struct in VAX 888 * byte-order, to compute the round-trip time, or a UNIX "timespec" in native 889 * format. 890 */ 891 static void 892 pinger(void) 893 { 894 struct tv32 tv32; 895 int i, cc, sw; 896 897 opack_icmp.icmp_code = 0; 898 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 899 900 /* clear the cached route in the kernel after an ICMP 901 * response such as a Redirect is seen to stop causing 902 * more such packets. Also clear the cached route 903 * periodically in case of routing changes that make 904 * black holes come and go. 905 */ 906 if (clear_cache.tv_sec != now.tv_sec) { 907 opack_icmp.icmp_type = ICMP_ECHOREPLY; 908 opack_icmp.icmp_id = ~ident; 909 opack_icmp.icmp_cksum = 0; 910 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 911 phdrlen); 912 sw = 0; 913 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 914 (char *)&sw, sizeof(sw)) < 0) 915 err(EXIT_FAILURE, "Can't turn off special IP header"); 916 if (prog_sendto(sloop, (char *) &opack_icmp, 917 ICMP_MINLEN, MSG_DONTROUTE, 918 (struct sockaddr *)&loc_addr, 919 sizeof(struct sockaddr_in)) < 0) { 920 /* 921 * XXX: we only report this as a warning in verbose 922 * mode because people get confused when they see 923 * this error when they are running in single user 924 * mode and they have not configured lo0 925 */ 926 if (pingflags & F_VERBOSE) 927 warn("failed to clear cached route"); 928 } 929 sw = 1; 930 if (prog_setsockopt(sloop, IPPROTO_IP, IP_HDRINCL, 931 (char *)&sw, sizeof(sw)) < 0) 932 err(EXIT_FAILURE, "Can't set special IP header"); 933 934 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 935 } 936 937 opack_icmp.icmp_type = ICMP_ECHO; 938 opack_icmp.icmp_id = ident; 939 940 if (pingflags & F_TIMING) { 941 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 942 tv32.tv32_usec = htonl(now.tv_nsec / 1000); 943 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 944 } else if (pingflags & F_TIMING64) 945 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 946 947 cc = MAX(datalen, ICMP_MINLEN) + PHDR_LEN; 948 opack_icmp.icmp_cksum = 0; 949 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 950 951 cc += opack_ip->ip_hl<<2; 952 opack_ip->ip_len = cc; 953 i = prog_sendto(s, (char *) opack_ip, cc, 0, 954 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 955 if (i != cc) { 956 jiggle_flush(1); 957 if (i < 0) 958 warn("sendto"); 959 else 960 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 961 (void)fflush(stderr); 962 } 963 lastrcvd = 0; 964 965 CLR(ntransmitted); 966 ntransmitted++; 967 968 last_tx = now; 969 if (next_tx.tv_sec == 0) { 970 first_tx = now; 971 next_tx = now; 972 } 973 974 /* Transmit regularly, at always the same microsecond in the 975 * second when going at one packet per second. 976 * If we are at most 100 ms behind, send extras to get caught up. 977 * Otherwise, skip packets we were too slow to send. 978 */ 979 if (diffsec(&next_tx, &now) <= interval) { 980 do { 981 timespecadd(&next_tx, &interval_tv, &next_tx); 982 } while (diffsec(&next_tx, &now) < -0.1); 983 } 984 985 if (pingflags & F_FLOOD) 986 jiggle(1); 987 988 /* While the packet is going out, ready buffer for the next 989 * packet. Use a fast but not very good random number generator. 990 */ 991 if (pingflags & F_PING_RANDOM) 992 rnd_fill(); 993 } 994 995 996 static void 997 pr_pack_sub(int cc, 998 char *addr, 999 int seqno, 1000 int dupflag, 1001 int ttl, 1002 double triptime) 1003 { 1004 jiggle_flush(1); 1005 1006 if (pingflags & F_FLOOD) 1007 return; 1008 1009 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 1010 if (dupflag) 1011 (void)printf(" DUP!"); 1012 (void)printf(" ttl=%d", ttl); 1013 if (pingflags & (F_TIMING|F_TIMING64)) { 1014 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 1015 1016 (void)printf(" time=%.*f ms", prec, triptime*1000.0); 1017 } 1018 1019 /* 1020 * Send beep to stderr, since that's more likely than stdout 1021 * to go to a terminal.. 1022 */ 1023 if (pingflags & F_AUDIBLE && !dupflag) 1024 (void)fprintf(stderr,"\a"); 1025 } 1026 1027 1028 /* 1029 * Print out the packet, if it came from us. This logic is necessary 1030 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 1031 * which arrive ('tis only fair). This permits multiple copies of this 1032 * program to be run without having intermingled output (or statistics!). 1033 */ 1034 static void 1035 pr_pack(u_char *buf, 1036 int tot_len, 1037 struct sockaddr_in *from) 1038 { 1039 struct ip *ip; 1040 struct icmp *icp; 1041 int i, j, net_len; 1042 u_char *cp; 1043 static int old_rrlen; 1044 static char old_rr[MAX_IPOPTLEN]; 1045 int hlen, dupflag = 0, dumped; 1046 double triptime = 0.0; 1047 #define PR_PACK_SUB() {if (!dumped) { \ 1048 dumped = 1; \ 1049 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 1050 ntohs((u_int16_t)icp->icmp_seq), \ 1051 dupflag, ip->ip_ttl, triptime);}} 1052 1053 /* Check the IP header */ 1054 ip = (struct ip *) buf; 1055 hlen = ip->ip_hl << 2; 1056 if (tot_len < hlen + ICMP_MINLEN) { 1057 if (pingflags & F_VERBOSE) { 1058 jiggle_flush(1); 1059 (void)printf("packet too short (%d bytes) from %s\n", 1060 tot_len, inet_ntoa(from->sin_addr)); 1061 } 1062 return; 1063 } 1064 1065 /* Now the ICMP part */ 1066 dumped = 0; 1067 net_len = tot_len - hlen; 1068 icp = (struct icmp *)(buf + hlen); 1069 if (icp->icmp_type == ICMP_ECHOREPLY 1070 && icp->icmp_id == ident) { 1071 1072 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 1073 lastrcvd = 1; 1074 last_rx = now; 1075 if (first_rx.tv_sec == 0) 1076 first_rx = last_rx; 1077 nreceived++; 1078 if (pingflags & (F_TIMING|F_TIMING64)) { 1079 struct timespec tv; 1080 1081 if (pingflags & F_TIMING) { 1082 struct tv32 tv32; 1083 1084 (void)memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1085 tv.tv_sec = (uint32_t)ntohl(tv32.tv32_sec); 1086 tv.tv_nsec = ntohl(tv32.tv32_usec) * 1000; 1087 } else if (pingflags & F_TIMING64) 1088 (void)memcpy(&tv, icp->icmp_data, sizeof(tv)); 1089 else 1090 memset(&tv, 0, sizeof(tv)); /* XXX: gcc */ 1091 1092 triptime = diffsec(&last_rx, &tv); 1093 tsum += triptime; 1094 tsumsq += triptime * triptime; 1095 if (triptime < tmin) 1096 tmin = triptime; 1097 if (triptime > tmax) 1098 tmax = triptime; 1099 } 1100 1101 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1102 nrepeats++, nreceived--; 1103 dupflag=1; 1104 } else { 1105 SET(ntohs((u_int16_t)icp->icmp_seq)); 1106 } 1107 1108 if (tot_len != opack_ip->ip_len) { 1109 PR_PACK_SUB(); 1110 switch (opack_ip->ip_len - tot_len) { 1111 case MAX_IPOPTLEN: 1112 if ((pongflags & F_RECORD_ROUTE) != 0) 1113 break; 1114 if ((pingflags & F_RECORD_ROUTE) == 0) 1115 goto out; 1116 pongflags |= F_RECORD_ROUTE; 1117 (void)printf("\nremote host does not " 1118 "support record route"); 1119 break; 1120 case 8: 1121 if ((pongflags & F_SOURCE_ROUTE) != 0) 1122 break; 1123 if ((pingflags & F_SOURCE_ROUTE) == 0) 1124 goto out; 1125 pongflags |= F_SOURCE_ROUTE; 1126 (void)printf("\nremote host does not " 1127 "support source route"); 1128 break; 1129 default: 1130 out: 1131 (void)printf("\nwrong total length %d " 1132 "instead of %d", tot_len, opack_ip->ip_len); 1133 break; 1134 } 1135 } 1136 1137 if (!dupflag) { 1138 static u_int16_t last_seqno = 0xffff; 1139 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1140 u_int16_t gap = seqno - (last_seqno + 1); 1141 if (gap > 0 && gap < 0x8000 && 1142 (pingflags & F_VERBOSE)) { 1143 (void)printf("[*** sequence gap of %u " 1144 "packets from %u ... %u ***]\n", gap, 1145 (u_int16_t) (last_seqno + 1), 1146 (u_int16_t) (seqno - 1)); 1147 if (pingflags & F_QUIET) 1148 summary(0); 1149 } 1150 1151 if (gap < 0x8000) 1152 last_seqno = seqno; 1153 } 1154 1155 if (pingflags & F_QUIET) 1156 return; 1157 1158 if (!(pingflags & F_FLOOD)) 1159 PR_PACK_SUB(); 1160 1161 /* check the data */ 1162 if ((size_t)(tot_len - hlen) > 1163 offsetof(struct icmp, icmp_data) + datalen 1164 && !(pingflags & F_PING_RANDOM) 1165 && memcmp(icp->icmp_data + phdrlen, 1166 opack_icmp.icmp_data + phdrlen, 1167 datalen - phdrlen)) { 1168 for (i = phdrlen; i < datalen; i++) { 1169 if (icp->icmp_data[i] != 1170 opack_icmp.icmp_data[i]) 1171 break; 1172 } 1173 PR_PACK_SUB(); 1174 (void)printf("\nwrong data byte #%d should have been" 1175 " %#x but was %#x", i - phdrlen, 1176 (u_char)opack_icmp.icmp_data[i], 1177 (u_char)icp->icmp_data[i]); 1178 for (i = phdrlen; i < datalen; i++) { 1179 if ((i % 16) == 0) 1180 (void)printf("\n\t"); 1181 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1182 } 1183 } 1184 1185 } else { 1186 if (!pr_icmph(icp, from, net_len)) 1187 return; 1188 dumped = 2; 1189 } 1190 1191 /* Display any IP options */ 1192 cp = buf + sizeof(struct ip); 1193 while (hlen > (int)sizeof(struct ip)) { 1194 switch (*cp) { 1195 case IPOPT_EOL: 1196 hlen = 0; 1197 break; 1198 case IPOPT_LSRR: 1199 hlen -= 2; 1200 j = *++cp; 1201 ++cp; 1202 j -= IPOPT_MINOFF; 1203 if (j <= 0) 1204 continue; 1205 if (dumped <= 1) { 1206 j = ((j+3)/4)*4; 1207 hlen -= j; 1208 cp += j; 1209 break; 1210 } 1211 PR_PACK_SUB(); 1212 (void)printf("\nLSRR: "); 1213 for (;;) { 1214 pr_saddr(cp); 1215 cp += 4; 1216 hlen -= 4; 1217 j -= 4; 1218 if (j <= 0) 1219 break; 1220 (void)putchar('\n'); 1221 } 1222 break; 1223 case IPOPT_RR: 1224 j = *++cp; /* get length */ 1225 i = *++cp; /* and pointer */ 1226 hlen -= 2; 1227 if (i > j) 1228 i = j; 1229 i -= IPOPT_MINOFF; 1230 if (i <= 0) 1231 continue; 1232 if (dumped <= 1) { 1233 if (i == old_rrlen 1234 && !memcmp(cp, old_rr, i)) { 1235 if (dumped) 1236 (void)printf("\t(same route)"); 1237 j = ((i+3)/4)*4; 1238 hlen -= j; 1239 cp += j; 1240 break; 1241 } 1242 old_rrlen = i; 1243 (void) memcpy(old_rr, cp, i); 1244 } 1245 if (!dumped) { 1246 jiggle_flush(1); 1247 (void)printf("RR: "); 1248 dumped = 1; 1249 } else { 1250 (void)printf("\nRR: "); 1251 } 1252 for (;;) { 1253 pr_saddr(cp); 1254 cp += 4; 1255 hlen -= 4; 1256 i -= 4; 1257 if (i <= 0) 1258 break; 1259 (void)putchar('\n'); 1260 } 1261 break; 1262 case IPOPT_NOP: 1263 if (dumped <= 1) 1264 break; 1265 PR_PACK_SUB(); 1266 (void)printf("\nNOP"); 1267 break; 1268 #ifdef sgi 1269 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1270 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1271 case IPOPT_CIPSO: /* Commercial IPSO */ 1272 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1273 i = (unsigned)cp[1]; 1274 hlen -= i - 1; 1275 PR_PACK_SUB(); 1276 (void)printf("\nSEC:"); 1277 while (i--) { 1278 (void)printf(" %02x", *cp++); 1279 } 1280 cp--; 1281 break; 1282 } 1283 #endif 1284 default: 1285 PR_PACK_SUB(); 1286 (void)printf("\nunknown option 0x%x", *cp); 1287 break; 1288 } 1289 hlen--; 1290 cp++; 1291 } 1292 1293 if (dumped) { 1294 (void)putchar('\n'); 1295 (void)fflush(stdout); 1296 } else { 1297 jiggle(-1); 1298 } 1299 } 1300 1301 1302 /* Compute the IP checksum 1303 * This assumes the packet is less than 32K long. 1304 */ 1305 static u_int16_t 1306 in_cksum(u_int16_t *p, u_int len) 1307 { 1308 u_int32_t sum = 0; 1309 int nwords = len >> 1; 1310 1311 while (nwords-- != 0) 1312 sum += *p++; 1313 1314 if (len & 1) { 1315 union { 1316 u_int16_t w; 1317 u_int8_t c[2]; 1318 } u; 1319 u.c[0] = *(u_char *)p; 1320 u.c[1] = 0; 1321 sum += u.w; 1322 } 1323 1324 /* end-around-carry */ 1325 sum = (sum >> 16) + (sum & 0xffff); 1326 sum += (sum >> 16); 1327 return (~sum); 1328 } 1329 1330 1331 /* 1332 * compute the difference of two timespecs in seconds 1333 */ 1334 static double 1335 diffsec(struct timespec *timenow, 1336 struct timespec *then) 1337 { 1338 if (timenow->tv_sec == 0) 1339 return -1; 1340 return (timenow->tv_sec - then->tv_sec) 1341 * 1.0 + (timenow->tv_nsec - then->tv_nsec) / 1000000000.0; 1342 } 1343 1344 1345 #if 0 1346 static void 1347 timespecadd(struct timespec *t1, 1348 struct timespec *t2) 1349 { 1350 1351 t1->tv_sec += t2->tv_sec; 1352 if ((t1->tv_nsec += t2->tv_nsec) >= 1000000000) { 1353 t1->tv_sec++; 1354 t1->tv_nsec -= 1000000000; 1355 } 1356 } 1357 #endif 1358 1359 1360 static void 1361 sec_to_timespec(const double sec, struct timespec *tp) 1362 { 1363 tp->tv_sec = sec; 1364 tp->tv_nsec = (sec - tp->tv_sec) * 1000000000.0; 1365 } 1366 1367 1368 static double 1369 timespec_to_sec(const struct timespec *tp) 1370 { 1371 return tp->tv_sec + tp->tv_nsec / 1000000000.0; 1372 } 1373 1374 1375 /* 1376 * Print statistics. 1377 * Heavily buffered STDIO is used here, so that all the statistics 1378 * will be written with 1 sys-write call. This is nice when more 1379 * than one copy of the program is running on a terminal; it prevents 1380 * the statistics output from becomming intermingled. 1381 */ 1382 static void 1383 summary(int header) 1384 { 1385 jiggle_flush(1); 1386 1387 if (header) 1388 (void)printf("\n----%s PING Statistics----\n", hostname); 1389 (void)printf("%d packets transmitted, ", ntransmitted); 1390 (void)printf("%d packets received, ", nreceived); 1391 if (nrepeats) 1392 (void)printf("+%d duplicates, ", nrepeats); 1393 if (ntransmitted) { 1394 if (nreceived > ntransmitted) 1395 (void)printf("-- somebody's duplicating packets!"); 1396 else 1397 (void)printf("%.1f%% packet loss", 1398 (((ntransmitted-nreceived)*100.0) / 1399 ntransmitted)); 1400 } 1401 (void)printf("\n"); 1402 if (nreceived && (pingflags & (F_TIMING|F_TIMING64))) { 1403 double n = nreceived + nrepeats; 1404 double avg = (tsum / n); 1405 double variance = 0.0; 1406 const unsigned int prec = (pingflags & F_TIMING64) != 0 ? 6 : 3; 1407 if (n>1) 1408 variance = (tsumsq - n*avg*avg) /(n-1); 1409 1410 (void)printf("round-trip min/avg/max/stddev = " 1411 "%.*f/%.*f/%.*f/%.*f ms\n", 1412 prec, tmin * 1000.0, 1413 prec, avg * 1000.0, 1414 prec, tmax * 1000.0, 1415 prec, sqrt(variance) * 1000.0); 1416 if (pingflags & F_FLOOD) { 1417 double r = diffsec(&last_rx, &first_rx); 1418 double t = diffsec(&last_tx, &first_tx); 1419 if (r == 0) 1420 r = 0.0001; 1421 if (t == 0) 1422 t = 0.0001; 1423 (void)printf(" %.1f packets/sec sent, " 1424 " %.1f packets/sec received\n", 1425 ntransmitted/t, nreceived/r); 1426 } 1427 } 1428 } 1429 1430 1431 /* 1432 * Print statistics when SIGINFO is received. 1433 */ 1434 /* ARGSUSED */ 1435 static void 1436 prtsig(int dummy) 1437 { 1438 1439 summary(0); 1440 #ifndef SIGINFO 1441 (void)signal(SIGQUIT, prtsig); 1442 #endif 1443 } 1444 1445 1446 /* 1447 * On the first SIGINT, allow any outstanding packets to dribble in 1448 */ 1449 static void 1450 prefinish(int sig) 1451 { 1452 if (lastrcvd /* quit now if caught up */ 1453 || nreceived == 0) /* or if remote is dead */ 1454 finish(0); 1455 1456 (void)signal(sig, finish); /* do this only the 1st time */ 1457 1458 if (npackets > ntransmitted) /* let the normal limit work */ 1459 npackets = ntransmitted; 1460 } 1461 1462 /* 1463 * Print statistics and give up. 1464 */ 1465 /* ARGSUSED */ 1466 static void 1467 finish(int dummy) 1468 { 1469 #ifdef SIGINFO 1470 (void)signal(SIGINFO, SIG_DFL); 1471 #else 1472 (void)signal(SIGQUIT, SIG_DFL); 1473 #endif 1474 1475 summary(1); 1476 exit(nreceived > 0 ? 0 : 2); 1477 } 1478 1479 static void 1480 blocksignals(void) 1481 { 1482 if (sigprocmask(SIG_SETMASK, &blockmask, NULL) == -1) { 1483 err(EXIT_FAILURE, "blocksignals: sigprocmask"); 1484 } 1485 } 1486 1487 static void 1488 enablesignals(void) 1489 { 1490 if (sigprocmask(SIG_SETMASK, &enablemask, NULL) == -1) { 1491 err(EXIT_FAILURE, "enablesignals: sigprocmask"); 1492 } 1493 } 1494 1495 1496 static int /* 0=do not print it */ 1497 ck_pr_icmph(struct icmp *icp, 1498 struct sockaddr_in *from, 1499 int cc, 1500 int override) /* 1=override VERBOSE if interesting */ 1501 { 1502 int hlen; 1503 struct ip ipb, *ip = &ipb; 1504 struct icmp icp2b, *icp2 = &icp2b; 1505 int res; 1506 1507 if (pingflags & F_VERBOSE) { 1508 res = 1; 1509 jiggle_flush(1); 1510 } else { 1511 res = 0; 1512 } 1513 1514 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1515 hlen = ip->ip_hl << 2; 1516 if (ip->ip_p == IPPROTO_ICMP 1517 && hlen + 6 <= cc) { 1518 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1519 if (icp2->icmp_id == ident) { 1520 /* remember to clear route cached in kernel 1521 * if this non-Echo-Reply ICMP message was for one 1522 * of our packets. 1523 */ 1524 clear_cache.tv_sec = 0; 1525 1526 if (!res && override 1527 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1528 jiggle_flush(1); 1529 (void)printf("%d bytes from %s: ", 1530 cc, pr_addr(&from->sin_addr)); 1531 res = 1; 1532 } 1533 } 1534 } 1535 1536 return res; 1537 } 1538 1539 1540 /* 1541 * Print a descriptive string about an ICMP header other than an echo reply. 1542 */ 1543 static int /* 0=printed nothing */ 1544 pr_icmph(struct icmp *icp, 1545 struct sockaddr_in *from, 1546 int cc) 1547 { 1548 switch (icp->icmp_type ) { 1549 case ICMP_UNREACH: 1550 if (!ck_pr_icmph(icp, from, cc, 1)) 1551 return 0; 1552 switch (icp->icmp_code) { 1553 case ICMP_UNREACH_NET: 1554 (void)printf("Destination Net Unreachable"); 1555 break; 1556 case ICMP_UNREACH_HOST: 1557 (void)printf("Destination Host Unreachable"); 1558 break; 1559 case ICMP_UNREACH_PROTOCOL: 1560 (void)printf("Destination Protocol Unreachable"); 1561 break; 1562 case ICMP_UNREACH_PORT: 1563 (void)printf("Destination Port Unreachable"); 1564 break; 1565 case ICMP_UNREACH_NEEDFRAG: 1566 (void)printf("frag needed and DF set. Next MTU=%d", 1567 ntohs(icp->icmp_nextmtu)); 1568 break; 1569 case ICMP_UNREACH_SRCFAIL: 1570 (void)printf("Source Route Failed"); 1571 break; 1572 case ICMP_UNREACH_NET_UNKNOWN: 1573 (void)printf("Unreachable unknown net"); 1574 break; 1575 case ICMP_UNREACH_HOST_UNKNOWN: 1576 (void)printf("Unreachable unknown host"); 1577 break; 1578 case ICMP_UNREACH_ISOLATED: 1579 (void)printf("Unreachable host isolated"); 1580 break; 1581 case ICMP_UNREACH_NET_PROHIB: 1582 (void)printf("Net prohibited access"); 1583 break; 1584 case ICMP_UNREACH_HOST_PROHIB: 1585 (void)printf("Host prohibited access"); 1586 break; 1587 case ICMP_UNREACH_TOSNET: 1588 (void)printf("Bad TOS for net"); 1589 break; 1590 case ICMP_UNREACH_TOSHOST: 1591 (void)printf("Bad TOS for host"); 1592 break; 1593 case 13: 1594 (void)printf("Communication prohibited"); 1595 break; 1596 case 14: 1597 (void)printf("Host precedence violation"); 1598 break; 1599 case 15: 1600 (void)printf("Precedence cutoff"); 1601 break; 1602 default: 1603 (void)printf("Bad Destination Unreachable Code: %d", 1604 icp->icmp_code); 1605 break; 1606 } 1607 /* Print returned IP header information */ 1608 pr_retip(icp, cc); 1609 break; 1610 1611 case ICMP_SOURCEQUENCH: 1612 if (!ck_pr_icmph(icp, from, cc, 1)) 1613 return 0; 1614 (void)printf("Source Quench"); 1615 pr_retip(icp, cc); 1616 break; 1617 1618 case ICMP_REDIRECT: 1619 if (!ck_pr_icmph(icp, from, cc, 1)) 1620 return 0; 1621 switch (icp->icmp_code) { 1622 case ICMP_REDIRECT_NET: 1623 (void)printf("Redirect Network"); 1624 break; 1625 case ICMP_REDIRECT_HOST: 1626 (void)printf("Redirect Host"); 1627 break; 1628 case ICMP_REDIRECT_TOSNET: 1629 (void)printf("Redirect Type of Service and Network"); 1630 break; 1631 case ICMP_REDIRECT_TOSHOST: 1632 (void)printf("Redirect Type of Service and Host"); 1633 break; 1634 default: 1635 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1636 break; 1637 } 1638 (void)printf(" New router addr: %s", 1639 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1640 pr_retip(icp, cc); 1641 break; 1642 1643 case ICMP_ECHO: 1644 if (!ck_pr_icmph(icp, from, cc, 0)) 1645 return 0; 1646 (void)printf("Echo Request: ID=%d seq=%d", 1647 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1648 break; 1649 1650 case ICMP_ECHOREPLY: 1651 /* displaying other's pings is too noisey */ 1652 #if 0 1653 if (!ck_pr_icmph(icp, from, cc, 0)) 1654 return 0; 1655 (void)printf("Echo Reply: ID=%d seq=%d", 1656 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1657 break; 1658 #else 1659 return 0; 1660 #endif 1661 1662 case ICMP_ROUTERADVERT: 1663 if (!ck_pr_icmph(icp, from, cc, 0)) 1664 return 0; 1665 (void)printf("Router Discovery Advert"); 1666 break; 1667 1668 case ICMP_ROUTERSOLICIT: 1669 if (!ck_pr_icmph(icp, from, cc, 0)) 1670 return 0; 1671 (void)printf("Router Discovery Solicit"); 1672 break; 1673 1674 case ICMP_TIMXCEED: 1675 if (!ck_pr_icmph(icp, from, cc, 1)) 1676 return 0; 1677 switch (icp->icmp_code ) { 1678 case ICMP_TIMXCEED_INTRANS: 1679 (void)printf("Time To Live exceeded"); 1680 break; 1681 case ICMP_TIMXCEED_REASS: 1682 (void)printf("Frag reassembly time exceeded"); 1683 break; 1684 default: 1685 (void)printf("Time exceeded, Bad Code: %d", 1686 icp->icmp_code); 1687 break; 1688 } 1689 pr_retip(icp, cc); 1690 break; 1691 1692 case ICMP_PARAMPROB: 1693 if (!ck_pr_icmph(icp, from, cc, 1)) 1694 return 0; 1695 (void)printf("Parameter problem: pointer = 0x%02x", 1696 icp->icmp_hun.ih_pptr); 1697 pr_retip(icp, cc); 1698 break; 1699 1700 case ICMP_TSTAMP: 1701 if (!ck_pr_icmph(icp, from, cc, 0)) 1702 return 0; 1703 (void)printf("Timestamp"); 1704 break; 1705 1706 case ICMP_TSTAMPREPLY: 1707 if (!ck_pr_icmph(icp, from, cc, 0)) 1708 return 0; 1709 (void)printf("Timestamp Reply"); 1710 break; 1711 1712 case ICMP_IREQ: 1713 if (!ck_pr_icmph(icp, from, cc, 0)) 1714 return 0; 1715 (void)printf("Information Request"); 1716 break; 1717 1718 case ICMP_IREQREPLY: 1719 if (!ck_pr_icmph(icp, from, cc, 0)) 1720 return 0; 1721 (void)printf("Information Reply"); 1722 break; 1723 1724 case ICMP_MASKREQ: 1725 if (!ck_pr_icmph(icp, from, cc, 0)) 1726 return 0; 1727 (void)printf("Address Mask Request"); 1728 break; 1729 1730 case ICMP_MASKREPLY: 1731 if (!ck_pr_icmph(icp, from, cc, 0)) 1732 return 0; 1733 (void)printf("Address Mask Reply"); 1734 break; 1735 1736 default: 1737 if (!ck_pr_icmph(icp, from, cc, 0)) 1738 return 0; 1739 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1740 if (pingflags & F_VERBOSE) 1741 pr_iph(icp, cc); 1742 } 1743 1744 return 1; 1745 } 1746 1747 1748 /* 1749 * Print an IP header with options. 1750 */ 1751 static void 1752 pr_iph(struct icmp *icp, 1753 int cc) 1754 { 1755 int hlen; 1756 u_char *cp; 1757 struct ip ipb, *ip = &ipb; 1758 1759 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1760 1761 hlen = ip->ip_hl << 2; 1762 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1763 1764 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1765 (void)printf(" %1x %1x %02x %04x %04x", 1766 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1767 (void)printf(" %1x %04x", 1768 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1769 (void)printf(" %02x %02x %04x", 1770 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1771 (void)printf(" %15s ", 1772 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1773 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1774 /* dump any option bytes */ 1775 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1776 (void)printf("%02x", *cp++); 1777 } 1778 } 1779 1780 /* 1781 * Print an ASCII host address starting from a string of bytes. 1782 */ 1783 static void 1784 pr_saddr(u_char *cp) 1785 { 1786 n_long l; 1787 struct in_addr addr; 1788 1789 l = (u_char)*++cp; 1790 l = (l<<8) + (u_char)*++cp; 1791 l = (l<<8) + (u_char)*++cp; 1792 l = (l<<8) + (u_char)*++cp; 1793 addr.s_addr = htonl(l); 1794 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1795 } 1796 1797 1798 /* 1799 * Return an ASCII host address 1800 * as a dotted quad and optionally with a hostname 1801 */ 1802 static char * 1803 pr_addr(struct in_addr *addr) /* in network order */ 1804 { 1805 struct hostent *hp; 1806 static char buf[MAXHOSTNAMELEN+4+16+1]; 1807 1808 if ((pingflags & F_NUMERIC) 1809 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1810 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1811 } else { 1812 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1813 inet_ntoa(*addr)); 1814 } 1815 1816 return buf; 1817 } 1818 1819 /* 1820 * Dump some info on a returned (via ICMP) IP packet. 1821 */ 1822 static void 1823 pr_retip(struct icmp *icp, 1824 int cc) 1825 { 1826 int hlen; 1827 u_char *cp; 1828 struct ip ipb, *ip = &ipb; 1829 1830 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1831 1832 if (pingflags & F_VERBOSE) 1833 pr_iph(icp, cc); 1834 1835 hlen = ip->ip_hl << 2; 1836 cp = (u_char *) &icp->icmp_data[hlen]; 1837 1838 if (ip->ip_p == IPPROTO_TCP) { 1839 if (pingflags & F_VERBOSE) 1840 (void)printf("\n TCP: from port %u, to port %u", 1841 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1842 } else if (ip->ip_p == IPPROTO_UDP) { 1843 if (pingflags & F_VERBOSE) 1844 (void)printf("\n UDP: from port %u, to port %u", 1845 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1846 } else if (ip->ip_p == IPPROTO_ICMP) { 1847 struct icmp icp2; 1848 (void) memcpy(&icp2, cp, sizeof(icp2)); 1849 if (icp2.icmp_type == ICMP_ECHO) { 1850 if (pingflags & F_VERBOSE) 1851 (void)printf("\n ID=%u icmp_seq=%u", 1852 ntohs((u_int16_t)icp2.icmp_id), 1853 ntohs((u_int16_t)icp2.icmp_seq)); 1854 else 1855 (void)printf(" for icmp_seq=%u", 1856 ntohs((u_int16_t)icp2.icmp_seq)); 1857 } 1858 } 1859 } 1860 1861 static void 1862 fill(void) 1863 { 1864 int i, j, k; 1865 char *cp; 1866 int pat[16]; 1867 1868 for (cp = fill_pat; *cp != '\0'; cp++) { 1869 if (!isxdigit((unsigned char)*cp)) 1870 break; 1871 } 1872 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1873 (void)fflush(stdout); 1874 errx(EXIT_FAILURE, "\"-p %s\": patterns must be specified with" 1875 " 1-32 hex digits\n", 1876 fill_pat); 1877 } 1878 1879 i = sscanf(fill_pat, 1880 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1881 &pat[0], &pat[1], &pat[2], &pat[3], 1882 &pat[4], &pat[5], &pat[6], &pat[7], 1883 &pat[8], &pat[9], &pat[10], &pat[11], 1884 &pat[12], &pat[13], &pat[14], &pat[15]); 1885 1886 for (k = phdrlen, j = 0; k < datalen; k++) { 1887 opack_icmp.icmp_data[k] = pat[j]; 1888 if (++j >= i) 1889 j = 0; 1890 } 1891 1892 if (!(pingflags & F_QUIET)) { 1893 (void)printf("PATTERN: 0x"); 1894 for (j=0; j<i; j++) 1895 (void)printf("%02x", 1896 (u_char)opack_icmp.icmp_data[phdrlen + j]); 1897 (void)printf("\n"); 1898 } 1899 1900 } 1901 1902 1903 static void 1904 rnd_fill(void) 1905 { 1906 static u_int32_t rnd; 1907 int i; 1908 1909 for (i = phdrlen; i < datalen; i++) { 1910 rnd = (3141592621U * rnd + 663896637U); 1911 opack_icmp.icmp_data[i] = rnd>>24; 1912 } 1913 } 1914 1915 1916 static void 1917 gethost(const char *arg, 1918 const char *name, 1919 struct sockaddr_in *sa, 1920 char *realname, 1921 int realname_len) 1922 { 1923 struct hostent *hp; 1924 1925 (void)memset(sa, 0, sizeof(*sa)); 1926 sa->sin_family = AF_INET; 1927 sa->sin_len = sizeof(struct sockaddr_in); 1928 1929 /* If it is an IP address, try to convert it to a name to 1930 * have something nice to display. 1931 */ 1932 if (inet_aton(name, &sa->sin_addr) != 0) { 1933 if (realname) { 1934 if (pingflags & F_NUMERIC) 1935 hp = 0; 1936 else 1937 hp = gethostbyaddr((char *)&sa->sin_addr, 1938 sizeof(sa->sin_addr), AF_INET); 1939 (void)strlcpy(realname, hp ? hp->h_name : name, 1940 realname_len); 1941 } 1942 return; 1943 } 1944 1945 hp = gethostbyname(name); 1946 if (!hp) 1947 errx(EXIT_FAILURE, "Cannot resolve \"%s\" (%s)", 1948 name, hstrerror(h_errno)); 1949 1950 if (hp->h_addrtype != AF_INET) 1951 errx(EXIT_FAILURE, "%s only supported with IP", arg); 1952 1953 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1954 1955 if (realname) 1956 (void)strlcpy(realname, hp->h_name, realname_len); 1957 } 1958 1959 1960 static void 1961 usage(void) 1962 { 1963 #ifdef IPSEC 1964 #ifdef IPSEC_POLICY_IPSEC 1965 #define IPSECOPT "\n [-E policy] " 1966 #else 1967 #define IPSECOPT "\n [-AE] " 1968 #endif /*IPSEC_POLICY_IPSEC*/ 1969 #else 1970 #define IPSECOPT "" 1971 #endif /*IPSEC*/ 1972 1973 (void)fprintf(stderr, "usage: \n" 1974 "%s [-aCDdfLnoPQqRrv] [-c count] [-g gateway] [-h host]" 1975 " [-I addr] [-i interval]\n" 1976 " [-l preload] [-p pattern] [-s size] [-T ttl] [-t tos]" 1977 " [-w maxwait] " IPSECOPT "host\n", 1978 getprogname()); 1979 exit(1); 1980 } 1981
Indexes created Tue Sep 30 20:09:53 GMT 2025