ping.c revision 1.102.2.1.2.1
1 /* $NetBSD: ping.c,v 1.102.2.1.2.1 2017/07/11 21:15:43 snj 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 1.102.2.1.2.1 2017/07/11 21:15:43 snj Exp $"); 62 #endif 63 64 #include <stdio.h> 65 #include <stddef.h> 66 #include <errno.h> 67 #include <signal.h> 68 #include <sys/time.h> 69 #include <sys/types.h> 70 #include <sys/param.h> 71 #include <sys/socket.h> 72 #include <sys/file.h> 73 #include <termios.h> 74 #include <stdlib.h> 75 #include <unistd.h> 76 #include <poll.h> 77 #include <limits.h> 78 #include <math.h> 79 #include <string.h> 80 #include <err.h> 81 82 #include <netinet/in_systm.h> 83 #include <netinet/in.h> 84 #include <netinet/ip.h> 85 #include <netinet/ip_icmp.h> 86 #include <netinet/ip_var.h> 87 #include <arpa/inet.h> 88 #include <ctype.h> 89 #include <netdb.h> 90 91 #ifdef IPSEC 92 #include <netipsec/ipsec.h> 93 #endif /*IPSEC*/ 94 95 #include "prog_ops.h" 96 97 #define FLOOD_INTVL 0.01 /* default flood output interval */ 98 #define MAXPACKET (IP_MAXPACKET-60-8) /* max packet size */ 99 100 #define F_VERBOSE 0x0001 101 #define F_QUIET 0x0002 /* minimize all output */ 102 #define F_SEMI_QUIET 0x0004 /* ignore our ICMP errors */ 103 #define F_FLOOD 0x0008 /* flood-ping */ 104 #define F_RECORD_ROUTE 0x0010 /* record route */ 105 #define F_SOURCE_ROUTE 0x0020 /* loose source route */ 106 #define F_PING_FILLED 0x0040 /* is buffer filled with user data? */ 107 #define F_PING_RANDOM 0x0080 /* use random data */ 108 #define F_NUMERIC 0x0100 /* do not do gethostbyaddr() calls */ 109 #define F_TIMING 0x0200 /* room for a timestamp */ 110 #define F_DF 0x0400 /* set IP DF bit */ 111 #define F_SOURCE_ADDR 0x0800 /* set source IP address/interface */ 112 #define F_ONCE 0x1000 /* exit(0) after receiving 1 reply */ 113 #define F_MCAST 0x2000 /* multicast target */ 114 #define F_MCAST_NOLOOP 0x4000 /* no multicast loopback */ 115 #define F_AUDIBLE 0x8000 /* audible output */ 116 #define F_TIMING64 0x10000 /* 64 bit time, nanoseconds */ 117 #ifdef IPSEC 118 #ifdef IPSEC_POLICY_IPSEC 119 #define F_POLICY 0x20000 120 #else 121 #define F_AUTHHDR 0x20000 122 #define F_ENCRYPT 0x40000 123 #endif /*IPSEC_POLICY_IPSEC*/ 124 #endif /*IPSEC*/ 125 126 127 /* MAX_DUP_CHK is the number of bits in received table, the 128 * maximum number of received sequence numbers we can track to check 129 * for duplicates. 130 */ 131 #define MAX_DUP_CHK (8 * 2048) 132 static u_char rcvd_tbl[MAX_DUP_CHK/8]; 133 static int nrepeats = 0; 134 #define A(seq) rcvd_tbl[(seq/8)%sizeof(rcvd_tbl)] /* byte in array */ 135 #define B(seq) (1 << (seq & 0x07)) /* bit in byte */ 136 #define SET(seq) (A(seq) |= B(seq)) 137 #define CLR(seq) (A(seq) &= (~B(seq))) 138 #define TST(seq) (A(seq) & B(seq)) 139 140 struct tv32 { 141 int32_t tv32_sec; 142 int32_t tv32_usec; 143 }; 144 145 146 static u_char *packet; 147 static int packlen; 148 static int pingflags = 0, options; 149 static int pongflags = 0; 150 static char *fill_pat; 151 152 static int s; /* Socket file descriptor */ 153 static int sloop; /* Socket file descriptor/loopback */ 154 155 #define PHDR_LEN sizeof(struct tv32) /* size of timestamp header */ 156 #define PHDR64_LEN sizeof(struct timespec) /* size of timestamp header */ 157 static struct sockaddr_in whereto, send_addr; /* Who to ping */ 158 static struct sockaddr_in src_addr; /* from where */ 159 static struct sockaddr_in loc_addr; /* 127.1 */ 160 static int datalen; /* How much data */ 161 static int phdrlen; 162 163 #ifndef __NetBSD__ 164 static char *progname; 165 #define getprogname() (progname) 166 #define setprogname(name) ((void)(progname = (name))) 167 #endif 168 169 static char hostname[MAXHOSTNAMELEN]; 170 171 static struct { 172 struct ip o_ip; 173 char o_opt[MAX_IPOPTLEN]; 174 union { 175 u_char u_buf[MAXPACKET+offsetof(struct icmp, icmp_data)]; 176 struct icmp u_icmp; 177 } o_u; 178 } out_pack; 179 #define opack_icmp out_pack.o_u.u_icmp 180 static struct ip *opack_ip; 181 182 static char optspace[MAX_IPOPTLEN]; /* record route space */ 183 static int optlen; 184 185 static int npackets; /* total packets to send */ 186 static int preload; /* number of packets to "preload" */ 187 static int ntransmitted; /* output sequence # = #sent */ 188 static int ident; /* our ID, in network byte order */ 189 190 static int nreceived; /* # of packets we got back */ 191 192 static double interval; /* interval between packets */ 193 static struct timespec interval_tv; 194 static double tmin = 999999999.0; 195 static double tmax = 0.0; 196 static double tsum = 0.0; /* sum of all times */ 197 static double tsumsq = 0.0; 198 static double maxwait = 0.0; 199 200 static int bufspace = IP_MAXPACKET; 201 202 static struct timespec now, clear_cache, last_tx, next_tx, first_tx; 203 static struct timespec last_rx, first_rx; 204 static int lastrcvd = 1; /* last ping sent has been received */ 205 206 static struct timespec jiggle_time; 207 static int jiggle_cnt, total_jiggled, jiggle_direction = -1; 208 209 __dead static void doit(void); 210 static void prefinish(int); 211 static void prtsig(int); 212 __dead static void finish(int); 213 static void summary(int); 214 static void pinger(void); 215 static void fill(void); 216 static void rnd_fill(void); 217 static double diffsec(struct timespec *, struct timespec *); 218 #if 0 219 static void timespecadd(struct timespec *, struct timespec *); 220 #endif 221 static void sec_to_timespec(const double, struct timespec *); 222 static double timespec_to_sec(const struct timespec *); 223 static void pr_pack(u_char *, int, struct sockaddr_in *); 224 static u_int16_t in_cksum(u_int16_t *, u_int); 225 static void pr_saddr(u_char *); 226 static char *pr_addr(struct in_addr *); 227 static void pr_iph(struct icmp *, int); 228 static void pr_retip(struct icmp *, int); 229 static int pr_icmph(struct icmp *, struct sockaddr_in *, int); 230 static void jiggle(int), jiggle_flush(int); 231 static void gethost(const char *, const char *, 232 struct sockaddr_in *, char *, int); 233 __dead static void usage(void); 234 235 int 236 main(int argc, char *argv[]) 237 { 238 int c, i, on = 1, hostind = 0; 239 long l; 240 int len = -1, compat = 0; 241 u_char ttl = 0; 242 u_long tos = 0; 243 char *p; 244 #ifdef IPSEC 245 #ifdef IPSEC_POLICY_IPSEC 246 char *policy_in = NULL; 247 char *policy_out = NULL; 248 #endif 249 #endif 250 #ifdef SIGINFO 251 struct sigaction sa; 252 #endif 253 254 if (prog_init && prog_init() == -1) 255 err(1, "init failed"); 256 257 if ((s = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 258 err(1, "Cannot create socket"); 259 if ((sloop = prog_socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)) < 0) 260 err(1, "Cannot create socket"); 261 262 /* 263 * sloop is never read on. This prevents packets from 264 * queueing in its recv buffer. 265 */ 266 if (prog_shutdown(sloop, SHUT_RD) == -1) 267 warn("Cannot shutdown for read"); 268 269 if (prog_setuid(prog_getuid()) == -1) 270 err(1, "setuid"); 271 272 setprogname(argv[0]); 273 274 #ifndef IPSEC 275 #define IPSECOPT 276 #else 277 #ifdef IPSEC_POLICY_IPSEC 278 #define IPSECOPT "E:" 279 #else 280 #define IPSECOPT "AE" 281 #endif /*IPSEC_POLICY_IPSEC*/ 282 #endif 283 while ((c = getopt(argc, argv, 284 "ac:CdDfg:h:i:I:l:Lnop:PqQrRs:t:T:vw:" IPSECOPT)) != -1) { 285 #undef IPSECOPT 286 switch (c) { 287 case 'a': 288 pingflags |= F_AUDIBLE; 289 break; 290 case 'C': 291 compat = 1; 292 break; 293 case 'c': 294 l = strtol(optarg, &p, 0); 295 if (*p != '\0' || l <= 0) 296 errx(EXIT_FAILURE, 297 "Bad/invalid number of packets: %s", 298 optarg); 299 #if INT_MAX < LONG_MAX 300 if (l > INT_MAX) 301 errx(EXIT_FAILURE, 302 "Too many packets to count: %ld", l); 303 #endif 304 npackets = l; 305 break; 306 case 'D': 307 pingflags |= F_DF; 308 break; 309 case 'd': 310 options |= SO_DEBUG; 311 break; 312 case 'f': 313 pingflags |= F_FLOOD; 314 break; 315 case 'h': 316 hostind = optind-1; 317 break; 318 case 'i': /* wait between sending packets */ 319 interval = strtod(optarg, &p); 320 if (*p != '\0' || interval <= 0) 321 errx(EXIT_FAILURE, "Bad/invalid interval: %s", 322 optarg); 323 /* 324 * In order to avoid overflowing the microseconds 325 * argument of poll() the interval must be less than 326 * INT_MAX/1000. Limit it to one second less than 327 * that to be safe. 328 */ 329 if (interval >= INT_MAX/1000.0 - 1.0) 330 errx(EXIT_FAILURE, 331 "Timing interval %g too large", interval); 332 break; 333 case 'l': 334 l = strtol(optarg, &p, 0); 335 if (*p != '\0' || l < 0) 336 errx(EXIT_FAILURE, "Bad/invalid preload value: " 337 "%s", optarg); 338 #if INT_MAX < LONG_MAX 339 if (l > INT_MAX) 340 errx(EXIT_FAILURE, 341 "Too many preload packets: %ld", l); 342 #endif 343 preload = l; 344 break; 345 case 'n': 346 pingflags |= F_NUMERIC; 347 break; 348 case 'o': 349 pingflags |= F_ONCE; 350 break; 351 case 'p': /* fill buffer with user pattern */ 352 if (pingflags & F_PING_RANDOM) 353 errx(1, "Only one of -P and -p allowed"); 354 pingflags |= F_PING_FILLED; 355 fill_pat = optarg; 356 break; 357 case 'P': 358 if (pingflags & F_PING_FILLED) 359 errx(1, "Only one of -P and -p allowed"); 360 pingflags |= F_PING_RANDOM; 361 break; 362 case 'q': 363 pingflags |= F_QUIET; 364 break; 365 case 'Q': 366 pingflags |= F_SEMI_QUIET; 367 break; 368 case 'r': 369 options |= SO_DONTROUTE; 370 break; 371 case 's': /* size of packet to send */ 372 l = strtol(optarg, &p, 0); 373 if (*p != '\0' || l < 0) 374 errx(1, "Bad/invalid packet size %s", optarg); 375 if (l > MAXPACKET) 376 errx(1, "packet size is too large"); 377 len = (int)l; 378 break; 379 case 'v': 380 pingflags |= F_VERBOSE; 381 break; 382 case 'R': 383 pingflags |= F_RECORD_ROUTE; 384 break; 385 case 'L': 386 pingflags |= F_MCAST_NOLOOP; 387 break; 388 case 't': 389 tos = strtoul(optarg, &p, 0); 390 if (*p != '\0' || tos > 0xFF) 391 errx(1, "bad tos value: %s", optarg); 392 break; 393 case 'T': 394 l = strtol(optarg, &p, 0); 395 if (*p != '\0' || l > 255 || l <= 0) 396 errx(1, "ttl out of range"); 397 ttl = (u_char)l; /* cannot check >255 otherwise */ 398 break; 399 case 'I': 400 pingflags |= F_SOURCE_ADDR; 401 gethost("-I", optarg, &src_addr, 0, 0); 402 break; 403 case 'g': 404 pingflags |= F_SOURCE_ROUTE; 405 gethost("-g", optarg, &send_addr, 0, 0); 406 break; 407 case 'w': 408 maxwait = strtod(optarg, &p); 409 if (*p != '\0' || maxwait <= 0) 410 errx(1, "Bad/invalid maxwait time %s", optarg); 411 break; 412 #ifdef IPSEC 413 #ifdef IPSEC_POLICY_IPSEC 414 case 'E': 415 pingflags |= F_POLICY; 416 if (!strncmp("in", optarg, 2)) { 417 policy_in = strdup(optarg); 418 if (!policy_in) 419 err(1, "strdup"); 420 } else if (!strncmp("out", optarg, 3)) { 421 policy_out = strdup(optarg); 422 if (!policy_out) 423 err(1, "strdup"); 424 } else 425 errx(1, "invalid security policy"); 426 break; 427 #else 428 case 'A': 429 pingflags |= F_AUTHHDR; 430 break; 431 case 'E': 432 pingflags |= F_ENCRYPT; 433 break; 434 #endif /*IPSEC_POLICY_IPSEC*/ 435 #endif /*IPSEC*/ 436 default: 437 usage(); 438 break; 439 } 440 } 441 442 if (interval == 0) 443 interval = (pingflags & F_FLOOD) ? FLOOD_INTVL : 1.0; 444 #ifndef sgi 445 if (pingflags & F_FLOOD && prog_getuid()) 446 errx(1, "Must be superuser to use -f"); 447 if (interval < 1.0 && prog_getuid()) 448 errx(1, "Must be superuser to use < 1 sec ping interval"); 449 if (preload > 0 && prog_getuid()) 450 errx(1, "Must be superuser to use -l"); 451 #endif 452 sec_to_timespec(interval, &interval_tv); 453 454 if ((pingflags & (F_AUDIBLE|F_FLOOD)) == (F_AUDIBLE|F_FLOOD)) 455 warnx("Sorry, no audible output for flood pings"); 456 457 if (npackets != 0) { 458 npackets += preload; 459 } else { 460 npackets = INT_MAX; 461 } 462 463 if (hostind == 0) { 464 if (optind != argc-1) 465 usage(); 466 else 467 hostind = optind; 468 } 469 else if (hostind >= argc - 1) 470 usage(); 471 472 gethost("", argv[hostind], &whereto, hostname, sizeof(hostname)); 473 if (IN_MULTICAST(ntohl(whereto.sin_addr.s_addr))) 474 pingflags |= F_MCAST; 475 if (!(pingflags & F_SOURCE_ROUTE)) 476 (void) memcpy(&send_addr, &whereto, sizeof(send_addr)); 477 478 loc_addr.sin_family = AF_INET; 479 loc_addr.sin_len = sizeof(struct sockaddr_in); 480 loc_addr.sin_addr.s_addr = htonl((127 << 24) + 1); 481 482 if (len != -1) 483 datalen = len; 484 else 485 datalen = 64; 486 if (!compat && datalen >= (int)PHDR64_LEN) { /* can we time them? */ 487 pingflags |= F_TIMING64; 488 phdrlen = PHDR64_LEN; 489 } else if (datalen >= (int)PHDR_LEN) { /* can we time them? */ 490 pingflags |= F_TIMING; 491 phdrlen = PHDR_LEN; 492 } else 493 phdrlen = 0; 494 datalen -= phdrlen; 495 496 packlen = datalen + 60 + 76; /* MAXIP + MAXICMP */ 497 if ((packet = malloc(packlen)) == NULL) 498 err(1, "Out of memory"); 499 500 if (pingflags & F_PING_FILLED) { 501 fill(); 502 } else if (pingflags & F_PING_RANDOM) { 503 rnd_fill(); 504 } else { 505 for (i = phdrlen; i < datalen; i++) 506 opack_icmp.icmp_data[i] = i; 507 } 508 509 ident = arc4random() & 0xFFFF; 510 511 if (options & SO_DEBUG) { 512 if (prog_setsockopt(s, 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(s, SOL_SOCKET, SO_DONTROUTE, 518 (char *)&on, sizeof(on)) == -1) 519 warn("SO_DONTROUTE"); 520 } 521 522 if (options & SO_DEBUG) { 523 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DEBUG, 524 (char *)&on, sizeof(on)) == -1) 525 warn("Can't turn on socket debugging"); 526 } 527 if (options & SO_DONTROUTE) { 528 if (prog_setsockopt(sloop, SOL_SOCKET, SO_DONTROUTE, 529 (char *)&on, sizeof(on)) == -1) 530 warn("SO_DONTROUTE"); 531 } 532 533 if (pingflags & F_SOURCE_ROUTE) { 534 optspace[IPOPT_OPTVAL] = IPOPT_LSRR; 535 optspace[IPOPT_OLEN] = optlen = 7; 536 optspace[IPOPT_OFFSET] = IPOPT_MINOFF; 537 (void)memcpy(&optspace[IPOPT_MINOFF-1], &whereto.sin_addr, 538 sizeof(whereto.sin_addr)); 539 optspace[optlen++] = IPOPT_NOP; 540 } 541 if (pingflags & F_RECORD_ROUTE) { 542 optspace[optlen+IPOPT_OPTVAL] = IPOPT_RR; 543 optspace[optlen+IPOPT_OLEN] = (MAX_IPOPTLEN -1-optlen); 544 optspace[optlen+IPOPT_OFFSET] = IPOPT_MINOFF; 545 optlen = MAX_IPOPTLEN; 546 } 547 /* this leaves opack_ip 0(mod 4) aligned */ 548 opack_ip = (struct ip *)((char *)&out_pack.o_ip 549 + sizeof(out_pack.o_opt) 550 - optlen); 551 (void) memcpy(opack_ip + 1, optspace, optlen); 552 553 if (prog_setsockopt(s,IPPROTO_IP,IP_HDRINCL, 554 (char *) &on, sizeof(on)) < 0) 555 err(1, "Can't set special IP header"); 556 557 opack_ip->ip_v = IPVERSION; 558 opack_ip->ip_hl = (sizeof(struct ip)+optlen) >> 2; 559 opack_ip->ip_tos = tos; 560 opack_ip->ip_off = (pingflags & F_DF) ? IP_DF : 0; 561 opack_ip->ip_ttl = ttl ? ttl : MAXTTL; 562 opack_ip->ip_p = IPPROTO_ICMP; 563 opack_ip->ip_src = src_addr.sin_addr; 564 opack_ip->ip_dst = send_addr.sin_addr; 565 566 if (pingflags & F_MCAST) { 567 if (pingflags & F_MCAST_NOLOOP) { 568 u_char loop = 0; 569 if (prog_setsockopt(s, IPPROTO_IP, 570 IP_MULTICAST_LOOP, 571 (char *) &loop, 1) < 0) 572 err(1, "Can't disable multicast loopback"); 573 } 574 575 if (ttl != 0 576 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_TTL, 577 (char *) &ttl, 1) < 0) 578 err(1, "Can't set multicast time-to-live"); 579 580 if ((pingflags & F_SOURCE_ADDR) 581 && prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 582 (char *) &src_addr.sin_addr, 583 sizeof(src_addr.sin_addr)) < 0) 584 err(1, "Can't set multicast source interface"); 585 586 } else if (pingflags & F_SOURCE_ADDR) { 587 if (prog_setsockopt(s, IPPROTO_IP, IP_MULTICAST_IF, 588 (char *) &src_addr.sin_addr, 589 sizeof(src_addr.sin_addr)) < 0) 590 err(1, "Can't set source interface/address"); 591 } 592 #ifdef IPSEC 593 #ifdef IPSEC_POLICY_IPSEC 594 { 595 char *buf; 596 if (pingflags & F_POLICY) { 597 if (policy_in != NULL) { 598 buf = ipsec_set_policy(policy_in, strlen(policy_in)); 599 if (buf == NULL) 600 errx(1, "%s", ipsec_strerror()); 601 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 602 buf, ipsec_get_policylen(buf)) < 0) { 603 err(1, "ipsec policy cannot be configured"); 604 } 605 free(buf); 606 } 607 if (policy_out != NULL) { 608 buf = ipsec_set_policy(policy_out, strlen(policy_out)); 609 if (buf == NULL) 610 errx(1, "%s", ipsec_strerror()); 611 if (prog_setsockopt(s, IPPROTO_IP, IP_IPSEC_POLICY, 612 buf, ipsec_get_policylen(buf)) < 0) { 613 err(1, "ipsec policy cannot be configured"); 614 } 615 free(buf); 616 } 617 } 618 buf = ipsec_set_policy("out bypass", strlen("out bypass")); 619 if (buf == NULL) 620 errx(1, "%s", ipsec_strerror()); 621 if (prog_setsockopt(sloop, IPPROTO_IP, IP_IPSEC_POLICY, 622 buf, ipsec_get_policylen(buf)) < 0) { 623 #if 0 624 warnx("ipsec is not configured"); 625 #else 626 /* ignore it, should be okay */ 627 #endif 628 } 629 free(buf); 630 } 631 #else 632 { 633 int optval; 634 if (pingflags & F_AUTHHDR) { 635 optval = IPSEC_LEVEL_REQUIRE; 636 #ifdef IP_AUTH_TRANS_LEVEL 637 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 638 (char *)&optval, sizeof(optval)); 639 #else 640 (void)prog_setsockopt(s, IPPROTO_IP, IP_AUTH_LEVEL, 641 (char *)&optval, sizeof(optval)); 642 #endif 643 } 644 if (pingflags & F_ENCRYPT) { 645 optval = IPSEC_LEVEL_REQUIRE; 646 (void)prog_setsockopt(s, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 647 (char *)&optval, sizeof(optval)); 648 } 649 optval = IPSEC_LEVEL_BYPASS; 650 #ifdef IP_AUTH_TRANS_LEVEL 651 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_TRANS_LEVEL, 652 (char *)&optval, sizeof(optval)); 653 #else 654 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_AUTH_LEVEL, 655 (char *)&optval, sizeof(optval)); 656 #endif 657 (void)prog_setsockopt(sloop, IPPROTO_IP, IP_ESP_TRANS_LEVEL, 658 (char *)&optval, sizeof(optval)); 659 } 660 #endif /*IPSEC_POLICY_IPSEC*/ 661 #endif /*IPSEC*/ 662 663 (void)printf("PING %s (%s): %d data bytes\n", hostname, 664 inet_ntoa(whereto.sin_addr), datalen); 665 666 /* When pinging the broadcast address, you can get a lot 667 * of answers. Doing something so evil is useful if you 668 * are trying to stress the ethernet, or just want to 669 * fill the arp cache to get some stuff for /etc/ethers. 670 */ 671 while (0 > prog_setsockopt(s, SOL_SOCKET, SO_RCVBUF, 672 (char*)&bufspace, sizeof(bufspace))) { 673 if ((bufspace -= 4096) <= 0) 674 err(1, "Cannot set the receive buffer size"); 675 } 676 677 /* make it possible to send giant probes, but do not worry now 678 * if it fails, since we probably won't send giant probes. 679 */ 680 (void)prog_setsockopt(s, SOL_SOCKET, SO_SNDBUF, 681 (char*)&bufspace, sizeof(bufspace)); 682 683 (void)signal(SIGINT, prefinish); 684 685 #ifdef SIGINFO 686 sa.sa_handler = prtsig; 687 sa.sa_flags = SA_NOKERNINFO; 688 sigemptyset(&sa.sa_mask); 689 (void)sigaction(SIGINFO, &sa, NULL); 690 #else 691 (void)signal(SIGQUIT, prtsig); 692 #endif 693 (void)signal(SIGCONT, prtsig); 694 695 /* fire off them quickies */ 696 for (i = 0; i < preload; i++) { 697 clock_gettime(CLOCK_MONOTONIC, &now); 698 pinger(); 699 } 700 701 doit(); 702 return 0; 703 } 704 705 706 static void 707 doit(void) 708 { 709 int cc; 710 struct sockaddr_in from; 711 socklen_t fromlen; 712 double sec, last, d_last; 713 struct pollfd fdmaskp[1]; 714 715 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 716 if (maxwait != 0) { 717 last = timespec_to_sec(&clear_cache) + maxwait; 718 d_last = 0; 719 } else { 720 last = 0; 721 d_last = 365*24*60*60; 722 } 723 724 do { 725 clock_gettime(CLOCK_MONOTONIC, &now); 726 727 if (last != 0) 728 d_last = last - timespec_to_sec(&now); 729 730 if (ntransmitted < npackets && d_last > 0) { 731 /* send if within 100 usec or late for next packet */ 732 sec = diffsec(&next_tx, &now); 733 if (sec <= 0.0001 || 734 (lastrcvd && (pingflags & F_FLOOD))) { 735 pinger(); 736 sec = diffsec(&next_tx, &now); 737 } 738 if (sec < 0.0) 739 sec = 0.0; 740 if (d_last < sec) 741 sec = d_last; 742 743 } else { 744 /* For the last response, wait twice as long as the 745 * worst case seen, or 10 times as long as the 746 * maximum interpacket interval, whichever is longer. 747 */ 748 sec = MAX(2 * tmax, 10 * interval) - 749 diffsec(&now, &last_tx); 750 if (d_last < sec) 751 sec = d_last; 752 if (sec <= 0) 753 break; 754 } 755 756 fdmaskp[0].fd = s; 757 fdmaskp[0].events = POLLIN; 758 cc = prog_poll(fdmaskp, 1, (int)(sec * 1000)); 759 if (cc <= 0) { 760 if (cc < 0) { 761 if (errno == EINTR) 762 continue; 763 jiggle_flush(1); 764 err(1, "poll"); 765 } 766 continue; 767 } 768 769 fromlen = sizeof(from); 770 cc = prog_recvfrom(s, (char *) packet, packlen, 771 0, (struct sockaddr *)&from, 772 &fromlen); 773 if (cc < 0) { 774 if (errno != EINTR) { 775 jiggle_flush(1); 776 warn("recvfrom"); 777 (void)fflush(stderr); 778 } 779 continue; 780 } 781 clock_gettime(CLOCK_MONOTONIC, &now); 782 pr_pack(packet, cc, &from); 783 784 } while (nreceived < npackets 785 && (nreceived == 0 || !(pingflags & F_ONCE))); 786 787 finish(0); 788 } 789 790 791 static void 792 jiggle_flush(int nl) /* new line if there are dots */ 793 { 794 int serrno = errno; 795 796 if (jiggle_cnt > 0) { 797 total_jiggled += jiggle_cnt; 798 jiggle_direction = 1; 799 do { 800 (void)putchar('.'); 801 } while (--jiggle_cnt > 0); 802 803 } else if (jiggle_cnt < 0) { 804 total_jiggled -= jiggle_cnt; 805 jiggle_direction = -1; 806 do { 807 (void)putchar('\b'); 808 } while (++jiggle_cnt < 0); 809 } 810 811 if (nl) { 812 if (total_jiggled != 0) 813 (void)putchar('\n'); 814 total_jiggled = 0; 815 jiggle_direction = -1; 816 } 817 818 (void)fflush(stdout); 819 (void)fflush(stderr); 820 jiggle_time = now; 821 errno = serrno; 822 } 823 824 825 /* jiggle the cursor for flood-ping 826 */ 827 static void 828 jiggle(int delta) 829 { 830 double dt; 831 832 if (pingflags & F_QUIET) 833 return; 834 835 /* do not back up into messages */ 836 if (total_jiggled+jiggle_cnt+delta < 0) 837 return; 838 839 jiggle_cnt += delta; 840 841 /* flush the FLOOD dots when things are quiet 842 * or occassionally to make the cursor jiggle. 843 */ 844 dt = diffsec(&last_tx, &jiggle_time); 845 if (dt > 0.2 || (dt >= 0.15 && delta*jiggle_direction < 0)) 846 jiggle_flush(0); 847 } 848 849 850 /* 851 * Compose and transmit an ICMP ECHO REQUEST packet. The IP packet 852 * will be added on by the kernel. The ID field is our UNIX process ID, 853 * and the sequence number is an ascending integer. The first phdrlen bytes 854 * of the data portion are used to hold a UNIX "timeval" struct in VAX 855 * byte-order, to compute the round-trip time, or a UNIX "timespec" in native 856 * format. 857 */ 858 static void 859 pinger(void) 860 { 861 struct tv32 tv32; 862 int i, cc, sw; 863 864 opack_icmp.icmp_code = 0; 865 opack_icmp.icmp_seq = htons((u_int16_t)(ntransmitted)); 866 867 /* clear the cached route in the kernel after an ICMP 868 * response such as a Redirect is seen to stop causing 869 * more such packets. Also clear the cached route 870 * periodically in case of routing changes that make 871 * black holes come and go. 872 */ 873 if (clear_cache.tv_sec != now.tv_sec) { 874 opack_icmp.icmp_type = ICMP_ECHOREPLY; 875 opack_icmp.icmp_id = ~ident; 876 opack_icmp.icmp_cksum = 0; 877 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, 878 phdrlen); 879 sw = 0; 880 if (prog_setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 881 (char *)&sw,sizeof(sw)) < 0) 882 err(1, "Can't turn off special IP header"); 883 if (prog_sendto(sloop, (char *) &opack_icmp, 884 phdrlen, MSG_DONTROUTE, 885 (struct sockaddr *)&loc_addr, 886 sizeof(struct sockaddr_in)) < 0) { 887 /* 888 * XXX: we only report this as a warning in verbose 889 * mode because people get confused when they see 890 * this error when they are running in single user 891 * mode and they have not configured lo0 892 */ 893 if (pingflags & F_VERBOSE) 894 warn("failed to clear cached route"); 895 } 896 sw = 1; 897 if (prog_setsockopt(sloop,IPPROTO_IP,IP_HDRINCL, 898 (char *)&sw, sizeof(sw)) < 0) 899 err(1, "Can't set special IP header"); 900 901 (void)clock_gettime(CLOCK_MONOTONIC, &clear_cache); 902 } 903 904 opack_icmp.icmp_type = ICMP_ECHO; 905 opack_icmp.icmp_id = ident; 906 907 if (pingflags & F_TIMING) { 908 tv32.tv32_sec = (uint32_t)htonl(now.tv_sec); 909 tv32.tv32_usec = htonl(now.tv_nsec / 1000); 910 (void) memcpy(&opack_icmp.icmp_data[0], &tv32, sizeof(tv32)); 911 } else if (pingflags & F_TIMING64) 912 (void) memcpy(&opack_icmp.icmp_data[0], &now, sizeof(now)); 913 914 cc = datalen + phdrlen; 915 opack_icmp.icmp_cksum = 0; 916 opack_icmp.icmp_cksum = in_cksum((u_int16_t *)&opack_icmp, cc); 917 918 cc += opack_ip->ip_hl<<2; 919 opack_ip->ip_len = cc; 920 i = prog_sendto(s, (char *) opack_ip, cc, 0, 921 (struct sockaddr *)&send_addr, sizeof(struct sockaddr_in)); 922 if (i != cc) { 923 jiggle_flush(1); 924 if (i < 0) 925 warn("sendto"); 926 else 927 warnx("wrote %s %d chars, ret=%d", hostname, cc, i); 928 (void)fflush(stderr); 929 } 930 lastrcvd = 0; 931 932 CLR(ntransmitted); 933 ntransmitted++; 934 935 last_tx = now; 936 if (next_tx.tv_sec == 0) { 937 first_tx = now; 938 next_tx = now; 939 } 940 941 /* Transmit regularly, at always the same microsecond in the 942 * second when going at one packet per second. 943 * If we are at most 100 ms behind, send extras to get caught up. 944 * Otherwise, skip packets we were too slow to send. 945 */ 946 if (diffsec(&next_tx, &now) <= interval) { 947 do { 948 timespecadd(&next_tx, &interval_tv, &next_tx); 949 } while (diffsec(&next_tx, &now) < -0.1); 950 } 951 952 if (pingflags & F_FLOOD) 953 jiggle(1); 954 955 /* While the packet is going out, ready buffer for the next 956 * packet. Use a fast but not very good random number generator. 957 */ 958 if (pingflags & F_PING_RANDOM) 959 rnd_fill(); 960 } 961 962 963 static void 964 pr_pack_sub(int cc, 965 char *addr, 966 int seqno, 967 int dupflag, 968 int ttl, 969 double triptime) 970 { 971 jiggle_flush(1); 972 973 if (pingflags & F_FLOOD) 974 return; 975 976 (void)printf("%d bytes from %s: icmp_seq=%u", cc, addr, seqno); 977 if (dupflag) 978 (void)printf(" DUP!"); 979 (void)printf(" ttl=%d", ttl); 980 if (pingflags & (F_TIMING|F_TIMING64)) 981 (void)printf(" time=%.3f ms", triptime*1000.0); 982 983 /* 984 * Send beep to stderr, since that's more likely than stdout 985 * to go to a terminal.. 986 */ 987 if (pingflags & F_AUDIBLE && !dupflag) 988 (void)fprintf(stderr,"\a"); 989 } 990 991 992 /* 993 * Print out the packet, if it came from us. This logic is necessary 994 * because ALL readers of the ICMP socket get a copy of ALL ICMP packets 995 * which arrive ('tis only fair). This permits multiple copies of this 996 * program to be run without having intermingled output (or statistics!). 997 */ 998 static void 999 pr_pack(u_char *buf, 1000 int tot_len, 1001 struct sockaddr_in *from) 1002 { 1003 struct ip *ip; 1004 struct icmp *icp; 1005 int i, j, net_len; 1006 u_char *cp; 1007 static int old_rrlen; 1008 static char old_rr[MAX_IPOPTLEN]; 1009 int hlen, dupflag = 0, dumped; 1010 double triptime = 0.0; 1011 #define PR_PACK_SUB() {if (!dumped) { \ 1012 dumped = 1; \ 1013 pr_pack_sub(net_len, inet_ntoa(from->sin_addr), \ 1014 ntohs((u_int16_t)icp->icmp_seq), \ 1015 dupflag, ip->ip_ttl, triptime);}} 1016 1017 /* Check the IP header */ 1018 ip = (struct ip *) buf; 1019 hlen = ip->ip_hl << 2; 1020 if (tot_len < hlen + ICMP_MINLEN) { 1021 if (pingflags & F_VERBOSE) { 1022 jiggle_flush(1); 1023 (void)printf("packet too short (%d bytes) from %s\n", 1024 tot_len, inet_ntoa(from->sin_addr)); 1025 } 1026 return; 1027 } 1028 1029 /* Now the ICMP part */ 1030 dumped = 0; 1031 net_len = tot_len - hlen; 1032 icp = (struct icmp *)(buf + hlen); 1033 if (icp->icmp_type == ICMP_ECHOREPLY 1034 && icp->icmp_id == ident) { 1035 struct timespec tv; 1036 1037 if (icp->icmp_seq == htons((u_int16_t)(ntransmitted-1))) 1038 lastrcvd = 1; 1039 last_rx = now; 1040 if (first_rx.tv_sec == 0) 1041 first_rx = last_rx; 1042 nreceived++; 1043 if (pingflags & F_TIMING) { 1044 struct tv32 tv32; 1045 1046 (void) memcpy(&tv32, icp->icmp_data, sizeof(tv32)); 1047 tv.tv_sec = (uint32_t)ntohl(tv32.tv32_sec); 1048 tv.tv_nsec = ntohl(tv32.tv32_usec) * 1000; 1049 } else if (pingflags & F_TIMING64) 1050 (void) memcpy(&tv, icp->icmp_data, sizeof(tv)); 1051 1052 if (pingflags & (F_TIMING|F_TIMING64)) { 1053 triptime = diffsec(&last_rx, &tv); 1054 tsum += triptime; 1055 tsumsq += triptime * triptime; 1056 if (triptime < tmin) 1057 tmin = triptime; 1058 if (triptime > tmax) 1059 tmax = triptime; 1060 } 1061 1062 if (TST(ntohs((u_int16_t)icp->icmp_seq))) { 1063 nrepeats++, nreceived--; 1064 dupflag=1; 1065 } else { 1066 SET(ntohs((u_int16_t)icp->icmp_seq)); 1067 } 1068 1069 if (tot_len != opack_ip->ip_len) { 1070 PR_PACK_SUB(); 1071 switch (opack_ip->ip_len - tot_len) { 1072 case MAX_IPOPTLEN: 1073 if ((pongflags & F_RECORD_ROUTE) != 0) 1074 break; 1075 if ((pingflags & F_RECORD_ROUTE) == 0) 1076 goto out; 1077 pongflags |= F_RECORD_ROUTE; 1078 (void)printf("\nremote host does not " 1079 "support record route"); 1080 break; 1081 case 8: 1082 if ((pongflags & F_SOURCE_ROUTE) != 0) 1083 break; 1084 if ((pingflags & F_SOURCE_ROUTE) == 0) 1085 goto out; 1086 pongflags |= F_SOURCE_ROUTE; 1087 (void)printf("\nremote host does not " 1088 "support source route"); 1089 break; 1090 default: 1091 out: 1092 (void)printf("\nwrong total length %d " 1093 "instead of %d", tot_len, opack_ip->ip_len); 1094 break; 1095 } 1096 } 1097 1098 if (!dupflag) { 1099 static u_int16_t last_seqno = 0xffff; 1100 u_int16_t seqno = ntohs((u_int16_t)icp->icmp_seq); 1101 u_int16_t gap = seqno - (last_seqno + 1); 1102 if (gap > 0 && gap < 0x8000 && 1103 (pingflags & F_VERBOSE)) { 1104 (void)printf("[*** sequence gap of %u " 1105 "packets from %u ... %u ***]\n", gap, 1106 (u_int16_t) (last_seqno + 1), 1107 (u_int16_t) (seqno - 1)); 1108 if (pingflags & F_QUIET) 1109 summary(0); 1110 } 1111 1112 if (gap < 0x8000) 1113 last_seqno = seqno; 1114 } 1115 1116 if (pingflags & F_QUIET) 1117 return; 1118 1119 if (!(pingflags & F_FLOOD)) 1120 PR_PACK_SUB(); 1121 1122 /* check the data */ 1123 if (datalen > phdrlen 1124 && !(pingflags & F_PING_RANDOM) 1125 && memcmp(icp->icmp_data + phdrlen, 1126 opack_icmp.icmp_data + phdrlen, 1127 datalen - phdrlen)) { 1128 for (i = phdrlen; i < datalen; i++) { 1129 if (icp->icmp_data[i] != 1130 opack_icmp.icmp_data[i]) 1131 break; 1132 } 1133 PR_PACK_SUB(); 1134 (void)printf("\nwrong data byte #%d should have been" 1135 " %#x but was %#x", i, 1136 (u_char)opack_icmp.icmp_data[i], 1137 (u_char)icp->icmp_data[i]); 1138 for (i = phdrlen; i < datalen; i++) { 1139 if ((i % 16) == phdrlen) 1140 (void)printf("\n\t"); 1141 (void)printf("%2x ",(u_char)icp->icmp_data[i]); 1142 } 1143 } 1144 1145 } else { 1146 if (!pr_icmph(icp, from, net_len)) 1147 return; 1148 dumped = 2; 1149 } 1150 1151 /* Display any IP options */ 1152 cp = buf + sizeof(struct ip); 1153 while (hlen > (int)sizeof(struct ip)) { 1154 switch (*cp) { 1155 case IPOPT_EOL: 1156 hlen = 0; 1157 break; 1158 case IPOPT_LSRR: 1159 hlen -= 2; 1160 j = *++cp; 1161 ++cp; 1162 j -= IPOPT_MINOFF; 1163 if (j <= 0) 1164 continue; 1165 if (dumped <= 1) { 1166 j = ((j+3)/4)*4; 1167 hlen -= j; 1168 cp += j; 1169 break; 1170 } 1171 PR_PACK_SUB(); 1172 (void)printf("\nLSRR: "); 1173 for (;;) { 1174 pr_saddr(cp); 1175 cp += 4; 1176 hlen -= 4; 1177 j -= 4; 1178 if (j <= 0) 1179 break; 1180 (void)putchar('\n'); 1181 } 1182 break; 1183 case IPOPT_RR: 1184 j = *++cp; /* get length */ 1185 i = *++cp; /* and pointer */ 1186 hlen -= 2; 1187 if (i > j) 1188 i = j; 1189 i -= IPOPT_MINOFF; 1190 if (i <= 0) 1191 continue; 1192 if (dumped <= 1) { 1193 if (i == old_rrlen 1194 && !memcmp(cp, old_rr, i)) { 1195 if (dumped) 1196 (void)printf("\t(same route)"); 1197 j = ((i+3)/4)*4; 1198 hlen -= j; 1199 cp += j; 1200 break; 1201 } 1202 old_rrlen = i; 1203 (void) memcpy(old_rr, cp, i); 1204 } 1205 if (!dumped) { 1206 jiggle_flush(1); 1207 (void)printf("RR: "); 1208 dumped = 1; 1209 } else { 1210 (void)printf("\nRR: "); 1211 } 1212 for (;;) { 1213 pr_saddr(cp); 1214 cp += 4; 1215 hlen -= 4; 1216 i -= 4; 1217 if (i <= 0) 1218 break; 1219 (void)putchar('\n'); 1220 } 1221 break; 1222 case IPOPT_NOP: 1223 if (dumped <= 1) 1224 break; 1225 PR_PACK_SUB(); 1226 (void)printf("\nNOP"); 1227 break; 1228 #ifdef sgi 1229 case IPOPT_SECURITY: /* RFC 1108 RIPSO BSO */ 1230 case IPOPT_ESO: /* RFC 1108 RIPSO ESO */ 1231 case IPOPT_CIPSO: /* Commercial IPSO */ 1232 if ((sysconf(_SC_IP_SECOPTS)) > 0) { 1233 i = (unsigned)cp[1]; 1234 hlen -= i - 1; 1235 PR_PACK_SUB(); 1236 (void)printf("\nSEC:"); 1237 while (i--) { 1238 (void)printf(" %02x", *cp++); 1239 } 1240 cp--; 1241 break; 1242 } 1243 #endif 1244 default: 1245 PR_PACK_SUB(); 1246 (void)printf("\nunknown option 0x%x", *cp); 1247 break; 1248 } 1249 hlen--; 1250 cp++; 1251 } 1252 1253 if (dumped) { 1254 (void)putchar('\n'); 1255 (void)fflush(stdout); 1256 } else { 1257 jiggle(-1); 1258 } 1259 } 1260 1261 1262 /* Compute the IP checksum 1263 * This assumes the packet is less than 32K long. 1264 */ 1265 static u_int16_t 1266 in_cksum(u_int16_t *p, u_int len) 1267 { 1268 u_int32_t sum = 0; 1269 int nwords = len >> 1; 1270 1271 while (nwords-- != 0) 1272 sum += *p++; 1273 1274 if (len & 1) { 1275 union { 1276 u_int16_t w; 1277 u_int8_t c[2]; 1278 } u; 1279 u.c[0] = *(u_char *)p; 1280 u.c[1] = 0; 1281 sum += u.w; 1282 } 1283 1284 /* end-around-carry */ 1285 sum = (sum >> 16) + (sum & 0xffff); 1286 sum += (sum >> 16); 1287 return (~sum); 1288 } 1289 1290 1291 /* 1292 * compute the difference of two timespecs in seconds 1293 */ 1294 static double 1295 diffsec(struct timespec *timenow, 1296 struct timespec *then) 1297 { 1298 if (timenow->tv_sec == 0) 1299 return -1; 1300 return (timenow->tv_sec - then->tv_sec) 1301 * 1.0 + (timenow->tv_nsec - then->tv_nsec) / 1000000000.0; 1302 } 1303 1304 1305 #if 0 1306 static void 1307 timespecadd(struct timespec *t1, 1308 struct timespec *t2) 1309 { 1310 1311 t1->tv_sec += t2->tv_sec; 1312 if ((t1->tv_nsec += t2->tv_nsec) >= 1000000000) { 1313 t1->tv_sec++; 1314 t1->tv_nsec -= 1000000000; 1315 } 1316 } 1317 #endif 1318 1319 1320 static void 1321 sec_to_timespec(const double sec, struct timespec *tp) 1322 { 1323 tp->tv_sec = sec; 1324 tp->tv_nsec = (sec - tp->tv_sec) * 1000000000.0; 1325 } 1326 1327 1328 static double 1329 timespec_to_sec(const struct timespec *tp) 1330 { 1331 return tp->tv_sec + tp->tv_nsec / 1000000000.0; 1332 } 1333 1334 1335 /* 1336 * Print statistics. 1337 * Heavily buffered STDIO is used here, so that all the statistics 1338 * will be written with 1 sys-write call. This is nice when more 1339 * than one copy of the program is running on a terminal; it prevents 1340 * the statistics output from becomming intermingled. 1341 */ 1342 static void 1343 summary(int header) 1344 { 1345 jiggle_flush(1); 1346 1347 if (header) 1348 (void)printf("\n----%s PING Statistics----\n", hostname); 1349 (void)printf("%d packets transmitted, ", ntransmitted); 1350 (void)printf("%d packets received, ", nreceived); 1351 if (nrepeats) 1352 (void)printf("+%d duplicates, ", nrepeats); 1353 if (ntransmitted) { 1354 if (nreceived > ntransmitted) 1355 (void)printf("-- somebody's duplicating packets!"); 1356 else 1357 (void)printf("%.1f%% packet loss", 1358 (((ntransmitted-nreceived)*100.0) / 1359 ntransmitted)); 1360 } 1361 (void)printf("\n"); 1362 if (nreceived && (pingflags & (F_TIMING|F_TIMING64))) { 1363 double n = nreceived + nrepeats; 1364 double avg = (tsum / n); 1365 double variance = 0.0; 1366 if (n>1) 1367 variance = (tsumsq - n*avg*avg) /(n-1); 1368 1369 printf("round-trip min/avg/max/stddev = " 1370 "%.3f/%.3f/%.3f/%.3f ms\n", 1371 tmin * 1000.0, avg * 1000.0, 1372 tmax * 1000.0, sqrt(variance) * 1000.0); 1373 if (pingflags & F_FLOOD) { 1374 double r = diffsec(&last_rx, &first_rx); 1375 double t = diffsec(&last_tx, &first_tx); 1376 if (r == 0) 1377 r = 0.0001; 1378 if (t == 0) 1379 t = 0.0001; 1380 (void)printf(" %.1f packets/sec sent, " 1381 " %.1f packets/sec received\n", 1382 ntransmitted/t, nreceived/r); 1383 } 1384 } 1385 } 1386 1387 1388 /* 1389 * Print statistics when SIGINFO is received. 1390 */ 1391 /* ARGSUSED */ 1392 static void 1393 prtsig(int dummy) 1394 { 1395 1396 summary(0); 1397 #ifndef SIGINFO 1398 (void)signal(SIGQUIT, prtsig); 1399 #endif 1400 } 1401 1402 1403 /* 1404 * On the first SIGINT, allow any outstanding packets to dribble in 1405 */ 1406 static void 1407 prefinish(int dummy) 1408 { 1409 if (lastrcvd /* quit now if caught up */ 1410 || nreceived == 0) /* or if remote is dead */ 1411 finish(0); 1412 1413 (void)signal(dummy, finish); /* do this only the 1st time */ 1414 1415 if (npackets > ntransmitted) /* let the normal limit work */ 1416 npackets = ntransmitted; 1417 } 1418 1419 /* 1420 * Print statistics and give up. 1421 */ 1422 /* ARGSUSED */ 1423 static void 1424 finish(int dummy) 1425 { 1426 #ifdef SIGINFO 1427 (void)signal(SIGINFO, SIG_DFL); 1428 #else 1429 (void)signal(SIGQUIT, SIG_DFL); 1430 #endif 1431 1432 summary(1); 1433 exit(nreceived > 0 ? 0 : 2); 1434 } 1435 1436 1437 static int /* 0=do not print it */ 1438 ck_pr_icmph(struct icmp *icp, 1439 struct sockaddr_in *from, 1440 int cc, 1441 int override) /* 1=override VERBOSE if interesting */ 1442 { 1443 int hlen; 1444 struct ip ipb, *ip = &ipb; 1445 struct icmp icp2b, *icp2 = &icp2b; 1446 int res; 1447 1448 if (pingflags & F_VERBOSE) { 1449 res = 1; 1450 jiggle_flush(1); 1451 } else { 1452 res = 0; 1453 } 1454 1455 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1456 hlen = ip->ip_hl << 2; 1457 if (ip->ip_p == IPPROTO_ICMP 1458 && hlen + 6 <= cc) { 1459 (void) memcpy(icp2, &icp->icmp_data[hlen], sizeof(*icp2)); 1460 if (icp2->icmp_id == ident) { 1461 /* remember to clear route cached in kernel 1462 * if this non-Echo-Reply ICMP message was for one 1463 * of our packets. 1464 */ 1465 clear_cache.tv_sec = 0; 1466 1467 if (!res && override 1468 && (pingflags & (F_QUIET|F_SEMI_QUIET)) == 0) { 1469 jiggle_flush(1); 1470 (void)printf("%d bytes from %s: ", 1471 cc, pr_addr(&from->sin_addr)); 1472 res = 1; 1473 } 1474 } 1475 } 1476 1477 return res; 1478 } 1479 1480 1481 /* 1482 * Print a descriptive string about an ICMP header other than an echo reply. 1483 */ 1484 static int /* 0=printed nothing */ 1485 pr_icmph(struct icmp *icp, 1486 struct sockaddr_in *from, 1487 int cc) 1488 { 1489 switch (icp->icmp_type ) { 1490 case ICMP_UNREACH: 1491 if (!ck_pr_icmph(icp, from, cc, 1)) 1492 return 0; 1493 switch (icp->icmp_code) { 1494 case ICMP_UNREACH_NET: 1495 (void)printf("Destination Net Unreachable"); 1496 break; 1497 case ICMP_UNREACH_HOST: 1498 (void)printf("Destination Host Unreachable"); 1499 break; 1500 case ICMP_UNREACH_PROTOCOL: 1501 (void)printf("Destination Protocol Unreachable"); 1502 break; 1503 case ICMP_UNREACH_PORT: 1504 (void)printf("Destination Port Unreachable"); 1505 break; 1506 case ICMP_UNREACH_NEEDFRAG: 1507 (void)printf("frag needed and DF set. Next MTU=%d", 1508 ntohs(icp->icmp_nextmtu)); 1509 break; 1510 case ICMP_UNREACH_SRCFAIL: 1511 (void)printf("Source Route Failed"); 1512 break; 1513 case ICMP_UNREACH_NET_UNKNOWN: 1514 (void)printf("Unreachable unknown net"); 1515 break; 1516 case ICMP_UNREACH_HOST_UNKNOWN: 1517 (void)printf("Unreachable unknown host"); 1518 break; 1519 case ICMP_UNREACH_ISOLATED: 1520 (void)printf("Unreachable host isolated"); 1521 break; 1522 case ICMP_UNREACH_NET_PROHIB: 1523 (void)printf("Net prohibited access"); 1524 break; 1525 case ICMP_UNREACH_HOST_PROHIB: 1526 (void)printf("Host prohibited access"); 1527 break; 1528 case ICMP_UNREACH_TOSNET: 1529 (void)printf("Bad TOS for net"); 1530 break; 1531 case ICMP_UNREACH_TOSHOST: 1532 (void)printf("Bad TOS for host"); 1533 break; 1534 case 13: 1535 (void)printf("Communication prohibited"); 1536 break; 1537 case 14: 1538 (void)printf("Host precedence violation"); 1539 break; 1540 case 15: 1541 (void)printf("Precedence cutoff"); 1542 break; 1543 default: 1544 (void)printf("Bad Destination Unreachable Code: %d", 1545 icp->icmp_code); 1546 break; 1547 } 1548 /* Print returned IP header information */ 1549 pr_retip(icp, cc); 1550 break; 1551 1552 case ICMP_SOURCEQUENCH: 1553 if (!ck_pr_icmph(icp, from, cc, 1)) 1554 return 0; 1555 (void)printf("Source Quench"); 1556 pr_retip(icp, cc); 1557 break; 1558 1559 case ICMP_REDIRECT: 1560 if (!ck_pr_icmph(icp, from, cc, 1)) 1561 return 0; 1562 switch (icp->icmp_code) { 1563 case ICMP_REDIRECT_NET: 1564 (void)printf("Redirect Network"); 1565 break; 1566 case ICMP_REDIRECT_HOST: 1567 (void)printf("Redirect Host"); 1568 break; 1569 case ICMP_REDIRECT_TOSNET: 1570 (void)printf("Redirect Type of Service and Network"); 1571 break; 1572 case ICMP_REDIRECT_TOSHOST: 1573 (void)printf("Redirect Type of Service and Host"); 1574 break; 1575 default: 1576 (void)printf("Redirect--Bad Code: %d", icp->icmp_code); 1577 break; 1578 } 1579 (void)printf(" New router addr: %s", 1580 pr_addr(&icp->icmp_hun.ih_gwaddr)); 1581 pr_retip(icp, cc); 1582 break; 1583 1584 case ICMP_ECHO: 1585 if (!ck_pr_icmph(icp, from, cc, 0)) 1586 return 0; 1587 (void)printf("Echo Request: ID=%d seq=%d", 1588 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1589 break; 1590 1591 case ICMP_ECHOREPLY: 1592 /* displaying other's pings is too noisey */ 1593 #if 0 1594 if (!ck_pr_icmph(icp, from, cc, 0)) 1595 return 0; 1596 (void)printf("Echo Reply: ID=%d seq=%d", 1597 ntohs(icp->icmp_id), ntohs(icp->icmp_seq)); 1598 break; 1599 #else 1600 return 0; 1601 #endif 1602 1603 case ICMP_ROUTERADVERT: 1604 if (!ck_pr_icmph(icp, from, cc, 0)) 1605 return 0; 1606 (void)printf("Router Discovery Advert"); 1607 break; 1608 1609 case ICMP_ROUTERSOLICIT: 1610 if (!ck_pr_icmph(icp, from, cc, 0)) 1611 return 0; 1612 (void)printf("Router Discovery Solicit"); 1613 break; 1614 1615 case ICMP_TIMXCEED: 1616 if (!ck_pr_icmph(icp, from, cc, 1)) 1617 return 0; 1618 switch (icp->icmp_code ) { 1619 case ICMP_TIMXCEED_INTRANS: 1620 (void)printf("Time To Live exceeded"); 1621 break; 1622 case ICMP_TIMXCEED_REASS: 1623 (void)printf("Frag reassembly time exceeded"); 1624 break; 1625 default: 1626 (void)printf("Time exceeded, Bad Code: %d", 1627 icp->icmp_code); 1628 break; 1629 } 1630 pr_retip(icp, cc); 1631 break; 1632 1633 case ICMP_PARAMPROB: 1634 if (!ck_pr_icmph(icp, from, cc, 1)) 1635 return 0; 1636 (void)printf("Parameter problem: pointer = 0x%02x", 1637 icp->icmp_hun.ih_pptr); 1638 pr_retip(icp, cc); 1639 break; 1640 1641 case ICMP_TSTAMP: 1642 if (!ck_pr_icmph(icp, from, cc, 0)) 1643 return 0; 1644 (void)printf("Timestamp"); 1645 break; 1646 1647 case ICMP_TSTAMPREPLY: 1648 if (!ck_pr_icmph(icp, from, cc, 0)) 1649 return 0; 1650 (void)printf("Timestamp Reply"); 1651 break; 1652 1653 case ICMP_IREQ: 1654 if (!ck_pr_icmph(icp, from, cc, 0)) 1655 return 0; 1656 (void)printf("Information Request"); 1657 break; 1658 1659 case ICMP_IREQREPLY: 1660 if (!ck_pr_icmph(icp, from, cc, 0)) 1661 return 0; 1662 (void)printf("Information Reply"); 1663 break; 1664 1665 case ICMP_MASKREQ: 1666 if (!ck_pr_icmph(icp, from, cc, 0)) 1667 return 0; 1668 (void)printf("Address Mask Request"); 1669 break; 1670 1671 case ICMP_MASKREPLY: 1672 if (!ck_pr_icmph(icp, from, cc, 0)) 1673 return 0; 1674 (void)printf("Address Mask Reply"); 1675 break; 1676 1677 default: 1678 if (!ck_pr_icmph(icp, from, cc, 0)) 1679 return 0; 1680 (void)printf("Bad ICMP type: %d", icp->icmp_type); 1681 if (pingflags & F_VERBOSE) 1682 pr_iph(icp, cc); 1683 } 1684 1685 return 1; 1686 } 1687 1688 1689 /* 1690 * Print an IP header with options. 1691 */ 1692 static void 1693 pr_iph(struct icmp *icp, 1694 int cc) 1695 { 1696 int hlen; 1697 u_char *cp; 1698 struct ip ipb, *ip = &ipb; 1699 1700 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1701 1702 hlen = ip->ip_hl << 2; 1703 cp = (u_char *) &icp->icmp_data[20]; /* point to options */ 1704 1705 (void)printf("\n Vr HL TOS Len ID Flg off TTL Pro cks Src Dst\n"); 1706 (void)printf(" %1x %1x %02x %04x %04x", 1707 ip->ip_v, ip->ip_hl, ip->ip_tos, ip->ip_len, ip->ip_id); 1708 (void)printf(" %1x %04x", 1709 ((ip->ip_off)&0xe000)>>13, (ip->ip_off)&0x1fff); 1710 (void)printf(" %02x %02x %04x", 1711 ip->ip_ttl, ip->ip_p, ip->ip_sum); 1712 (void)printf(" %15s ", 1713 inet_ntoa(*(struct in_addr *)&ip->ip_src.s_addr)); 1714 (void)printf(" %s ", inet_ntoa(*(struct in_addr *)&ip->ip_dst.s_addr)); 1715 /* dump any option bytes */ 1716 while (hlen-- > 20 && cp < (u_char*)icp+cc) { 1717 (void)printf("%02x", *cp++); 1718 } 1719 } 1720 1721 /* 1722 * Print an ASCII host address starting from a string of bytes. 1723 */ 1724 static void 1725 pr_saddr(u_char *cp) 1726 { 1727 n_long l; 1728 struct in_addr addr; 1729 1730 l = (u_char)*++cp; 1731 l = (l<<8) + (u_char)*++cp; 1732 l = (l<<8) + (u_char)*++cp; 1733 l = (l<<8) + (u_char)*++cp; 1734 addr.s_addr = htonl(l); 1735 (void)printf("\t%s", (l == 0) ? "0.0.0.0" : pr_addr(&addr)); 1736 } 1737 1738 1739 /* 1740 * Return an ASCII host address 1741 * as a dotted quad and optionally with a hostname 1742 */ 1743 static char * 1744 pr_addr(struct in_addr *addr) /* in network order */ 1745 { 1746 struct hostent *hp; 1747 static char buf[MAXHOSTNAMELEN+4+16+1]; 1748 1749 if ((pingflags & F_NUMERIC) 1750 || !(hp = gethostbyaddr((char *)addr, sizeof(*addr), AF_INET))) { 1751 (void)snprintf(buf, sizeof(buf), "%s", inet_ntoa(*addr)); 1752 } else { 1753 (void)snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name, 1754 inet_ntoa(*addr)); 1755 } 1756 1757 return buf; 1758 } 1759 1760 /* 1761 * Dump some info on a returned (via ICMP) IP packet. 1762 */ 1763 static void 1764 pr_retip(struct icmp *icp, 1765 int cc) 1766 { 1767 int hlen; 1768 u_char *cp; 1769 struct ip ipb, *ip = &ipb; 1770 1771 (void) memcpy(ip, icp->icmp_data, sizeof(*ip)); 1772 1773 if (pingflags & F_VERBOSE) 1774 pr_iph(icp, cc); 1775 1776 hlen = ip->ip_hl << 2; 1777 cp = (u_char *) &icp->icmp_data[hlen]; 1778 1779 if (ip->ip_p == IPPROTO_TCP) { 1780 if (pingflags & F_VERBOSE) 1781 (void)printf("\n TCP: from port %u, to port %u", 1782 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1783 } else if (ip->ip_p == IPPROTO_UDP) { 1784 if (pingflags & F_VERBOSE) 1785 (void)printf("\n UDP: from port %u, to port %u", 1786 (*cp*256+*(cp+1)), (*(cp+2)*256+*(cp+3))); 1787 } else if (ip->ip_p == IPPROTO_ICMP) { 1788 struct icmp icp2; 1789 (void) memcpy(&icp2, cp, sizeof(icp2)); 1790 if (icp2.icmp_type == ICMP_ECHO) { 1791 if (pingflags & F_VERBOSE) 1792 (void)printf("\n ID=%u icmp_seq=%u", 1793 ntohs((u_int16_t)icp2.icmp_id), 1794 ntohs((u_int16_t)icp2.icmp_seq)); 1795 else 1796 (void)printf(" for icmp_seq=%u", 1797 ntohs((u_int16_t)icp2.icmp_seq)); 1798 } 1799 } 1800 } 1801 1802 static void 1803 fill(void) 1804 { 1805 int i, j, k; 1806 char *cp; 1807 int pat[16]; 1808 1809 for (cp = fill_pat; *cp != '\0'; cp++) { 1810 if (!isxdigit((unsigned char)*cp)) 1811 break; 1812 } 1813 if (cp == fill_pat || *cp != '\0' || (cp-fill_pat) > 16*2) { 1814 (void)fflush(stdout); 1815 errx(1, "\"-p %s\": patterns must be specified with" 1816 " 1-32 hex digits\n", 1817 fill_pat); 1818 } 1819 1820 i = sscanf(fill_pat, 1821 "%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x%2x", 1822 &pat[0], &pat[1], &pat[2], &pat[3], 1823 &pat[4], &pat[5], &pat[6], &pat[7], 1824 &pat[8], &pat[9], &pat[10], &pat[11], 1825 &pat[12], &pat[13], &pat[14], &pat[15]); 1826 1827 for (k = phdrlen, j = 0; k <= datalen; k++) { 1828 opack_icmp.icmp_data[k] = pat[j]; 1829 if (++j >= i) 1830 j = 0; 1831 } 1832 1833 if (!(pingflags & F_QUIET)) { 1834 (void)printf("PATTERN: 0x"); 1835 for (j=0; j<i; j++) 1836 (void)printf("%02x", 1837 (u_char)opack_icmp.icmp_data[phdrlen + j]); 1838 (void)printf("\n"); 1839 } 1840 1841 } 1842 1843 1844 static void 1845 rnd_fill(void) 1846 { 1847 static u_int32_t rnd; 1848 int i; 1849 1850 for (i = phdrlen; i < datalen; i++) { 1851 rnd = (3141592621U * rnd + 663896637U); 1852 opack_icmp.icmp_data[i] = rnd>>24; 1853 } 1854 } 1855 1856 1857 static void 1858 gethost(const char *arg, 1859 const char *name, 1860 struct sockaddr_in *sa, 1861 char *realname, 1862 int realname_len) 1863 { 1864 struct hostent *hp; 1865 1866 (void)memset(sa, 0, sizeof(*sa)); 1867 sa->sin_family = AF_INET; 1868 sa->sin_len = sizeof(struct sockaddr_in); 1869 1870 /* If it is an IP address, try to convert it to a name to 1871 * have something nice to display. 1872 */ 1873 if (inet_aton(name, &sa->sin_addr) != 0) { 1874 if (realname) { 1875 if (pingflags & F_NUMERIC) 1876 hp = 0; 1877 else 1878 hp = gethostbyaddr((char *)&sa->sin_addr, 1879 sizeof(sa->sin_addr), 1880 AF_INET); 1881 (void)strlcpy(realname, hp ? hp->h_name : name, 1882 realname_len); 1883 } 1884 return; 1885 } 1886 1887 hp = gethostbyname(name); 1888 if (!hp) 1889 errx(1, "Cannot resolve \"%s\" (%s)",name,hstrerror(h_errno)); 1890 1891 if (hp->h_addrtype != AF_INET) 1892 errx(1, "%s only supported with IP", arg); 1893 1894 (void)memcpy(&sa->sin_addr, hp->h_addr, sizeof(sa->sin_addr)); 1895 1896 if (realname) 1897 (void)strlcpy(realname, hp->h_name, realname_len); 1898 } 1899 1900 1901 static void 1902 usage(void) 1903 { 1904 #ifdef IPSEC 1905 #ifdef IPSEC_POLICY_IPSEC 1906 #define IPSECOPT "\n [-E policy] " 1907 #else 1908 #define IPSECOPT "\n [-AE] " 1909 #endif /*IPSEC_POLICY_IPSEC*/ 1910 #else 1911 #define IPSECOPT "" 1912 #endif /*IPSEC*/ 1913 1914 (void)fprintf(stderr, "usage: \n" 1915 "%s [-aCDdfLnoPQqRrv] [-c count] [-g gateway] [-h host]" 1916 " [-I addr] [-i interval]\n" 1917 " [-l preload] [-p pattern] [-s size] [-T ttl] [-t tos]" 1918 " [-w maxwait] " IPSECOPT "host\n", 1919 getprogname()); 1920 exit(1); 1921 } 1922
Indexes created Mon Oct 20 08:09:54 GMT 2025