src/liboping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2016  Florian octo Forster <ff at octo.it>
   4  *
   5  * This library is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU Lesser General Public License as published by the
   7  * Free Software Foundation; either version 2.1 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public License
  16  * along with this library; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifdef __APPLE__
  21 #define __APPLE_USE_RFC_3542
  22 #endif
  23
  24 #if HAVE_CONFIG_H
  25 # include <config.h>
  26 #endif
  27
  28 #if STDC_HEADERS
  29 # include <stdlib.h>
  30 # include <stdio.h>
  31 # include <string.h>
  32 # include <inttypes.h>
  33 # include <errno.h>
  34 # include <assert.h>
  35 #else
  36 # error "You don't have the standard C99 header files installed"
  37 #endif /* STDC_HEADERS */
  38
  39 #ifdef HAVE_STDINT_H
  40 # include <stdint.h>
  41 #endif
  42
  43 #if HAVE_UNISTD_H
  44 # include <unistd.h>
  45 #endif
  46
  47 #if HAVE_FCNTL_H
  48 # include <fcntl.h>
  49 #endif
  50 #if HAVE_SYS_TYPES_H
  51 # include <sys/types.h>
  52 #endif
  53 #if HAVE_SYS_STAT_H
  54 # include <sys/stat.h>
  55 #endif
  56
  57 #if TIME_WITH_SYS_TIME
  58 # include <sys/time.h>
  59 # include <time.h>
  60 #else
  61 # if HAVE_SYS_TIME_H
  62 #  include <sys/time.h>
  63 # else
  64 #  include <time.h>
  65 # endif
  66 #endif
  67
  68 #if HAVE_SYS_SOCKET_H
  69 # include <sys/socket.h>
  70 #endif
  71
  72 #if HAVE_NETDB_H
  73 # include <netdb.h>
  74 #endif
  75
  76 #if HAVE_NETINET_IN_SYSTM_H
  77 # include <netinet/in_systm.h>
  78 #endif
  79 #if HAVE_NETINET_IN_H
  80 # include <netinet/in.h>
  81 #endif
  82 #if HAVE_NETINET_IP_H
  83 # include <netinet/ip.h>
  84 #endif
  85 #if HAVE_NETINET_IP_ICMP_H
  86 # include <netinet/ip_icmp.h>
  87 #endif
  88 #ifdef HAVE_NETINET_IP_VAR_H
  89 # include <netinet/ip_var.h>
  90 #endif
  91 #if HAVE_NETINET_IP6_H
  92 # include <netinet/ip6.h>
  93 #endif
  94 #if HAVE_NETINET_ICMP6_H
  95 # include <netinet/icmp6.h>
  96 #endif
  97
  98 #include "oping.h"
  99
 100 #if WITH_DEBUG
 101 # define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
 102 #else
 103 # define dprintf(...) /**/
 104 #endif
 105
 106 #define PING_ERRMSG_LEN 256
 107
 108 struct pinghost
 109 {
 110         /* username: name passed in by the user */
 111         char                    *username;
 112         /* hostname: name returned by the reverse lookup */
 113         char                    *hostname;
 114         struct sockaddr_storage *addr;
 115         socklen_t                addrlen;
 116         int                      addrfamily;
 117         int                      fd;
 118         int                      ident;
 119         int                      sequence;
 120         struct timeval          *timer;
 121         double                   latency;
 122         uint32_t                 dropped;
 123         int                      recv_ttl;
 124         uint8_t                  recv_qos;
 125         char                    *data;
 126
 127         void                    *context;
 128
 129         struct pinghost         *next;
 130 };
 131
 132 struct pingobj
 133 {
 134         double                   timeout;
 135         int                      ttl;
 136         int                      addrfamily;
 137         uint8_t                  qos;
 138         char                    *data;
 139
 140         struct sockaddr         *srcaddr;
 141         socklen_t                srcaddrlen;
 142
 143         char                    *device;
 144
 145         char                    set_mark;
 146         int                     mark;
 147
 148         char                     errmsg[PING_ERRMSG_LEN];
 149
 150         pinghost_t              *head;
 151 };
 152
 153 /*
 154  * private (static) functions
 155  */
 156 /* Even though Posix requires "strerror_r" to return an "int",
 157  * some systems (e.g. the GNU libc) return a "char *" _and_
 158  * ignore the second argument ... -tokkee */
 159 static char *sstrerror (int errnum, char *buf, size_t buflen)
 160 {
 161         buf[0] = 0;
 162
 163 #if !HAVE_STRERROR_R
 164         {
 165                 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
 166         }
 167 /* #endif !HAVE_STRERROR_R */
 168
 169 #elif STRERROR_R_CHAR_P
 170         {
 171                 char *temp;
 172                 temp = strerror_r (errnum, buf, buflen);
 173                 if (buf[0] == 0)
 174                 {
 175                         if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
 176                                 strncpy (buf, temp, buflen);
 177                         else
 178                                 strncpy (buf, "strerror_r did not return "
 179                                                 "an error message", buflen);
 180                 }
 181         }
 182 /* #endif STRERROR_R_CHAR_P */
 183
 184 #else
 185         if (strerror_r (errnum, buf, buflen) != 0)
 186         {
 187                 snprintf (buf, buflen, "Error %i (%#x); "
 188                                 "Additionally, strerror_r failed.",
 189                                 errnum, errnum);
 190         }
 191 #endif /* STRERROR_R_CHAR_P */
 192
 193         buf[buflen - 1] = 0;
 194
 195         return (buf);
 196 } /* char *sstrerror */
 197
 198 static void ping_set_error (pingobj_t *obj, const char *function,
 199                 const char *message)
 200 {
 201         snprintf (obj->errmsg, sizeof (obj->errmsg),
 202                         "%s: %s", function, message);
 203         obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
 204 }
 205
 206 static void ping_set_errno (pingobj_t *obj, int error_number)
 207 {
 208         sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
 209 }
 210
 211 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
 212                 struct timeval *res)
 213 {
 214         res->tv_sec  = tv1->tv_sec  + tv2->tv_sec;
 215         res->tv_usec = tv1->tv_usec + tv2->tv_usec;
 216
 217         while (res->tv_usec > 1000000)
 218         {
 219                 res->tv_usec -= 1000000;
 220                 res->tv_sec++;
 221         }
 222
 223         return (0);
 224 }
 225
 226 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
 227                 struct timeval *res)
 228 {
 229         if ((tv1->tv_sec < tv2->tv_sec)
 230                         || ((tv1->tv_sec == tv2->tv_sec)
 231                                 && (tv1->tv_usec < tv2->tv_usec)))
 232                 return (-1);
 233
 234         res->tv_sec  = tv1->tv_sec  - tv2->tv_sec;
 235         res->tv_usec = tv1->tv_usec - tv2->tv_usec;
 236
 237         assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
 238
 239         while (res->tv_usec < 0)
 240         {
 241                 res->tv_usec += 1000000;
 242                 res->tv_sec--;
 243         }
 244
 245         return (0);
 246 }
 247
 248 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
 249 {
 250         uint32_t sum = 0;
 251         uint16_t ret = 0;
 252
 253         uint16_t *ptr;
 254
 255         for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
 256                 sum += *ptr;
 257
 258         if (len == 1)
 259         {
 260                 *(char *) &ret = *(char *) ptr;
 261                 sum += ret;
 262         }
 263
 264         /* Do this twice to get all possible carries.. */
 265         sum = (sum >> 16) + (sum & 0xFFFF);
 266         sum = (sum >> 16) + (sum & 0xFFFF);
 267
 268         ret = ~sum;
 269
 270         return (ret);
 271 }
 272
 273 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
 274                 size_t buffer_len)
 275 {
 276         struct ip *ip_hdr;
 277         struct icmp *icmp_hdr;
 278
 279         size_t ip_hdr_len;
 280
 281         uint16_t recv_checksum;
 282         uint16_t calc_checksum;
 283
 284         uint16_t ident;
 285         uint16_t seq;
 286
 287         pinghost_t *ptr;
 288
 289         if (buffer_len < sizeof (struct ip))
 290                 return (NULL);
 291
 292         ip_hdr     = (struct ip *) buffer;
 293         ip_hdr_len = ip_hdr->ip_hl << 2;
 294
 295         if (buffer_len < ip_hdr_len)
 296                 return (NULL);
 297
 298         buffer     += ip_hdr_len;
 299         buffer_len -= ip_hdr_len;
 300
 301         if (buffer_len < ICMP_MINLEN)
 302                 return (NULL);
 303
 304         icmp_hdr = (struct icmp *) buffer;
 305         if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
 306         {
 307                 dprintf ("Unexpected ICMP type: %"PRIu8"\n", icmp_hdr->icmp_type);
 308                 return (NULL);
 309         }
 310
 311         recv_checksum = icmp_hdr->icmp_cksum;
 312         /* This writes to buffer. */
 313         icmp_hdr->icmp_cksum = 0;
 314         calc_checksum = ping_icmp4_checksum (buffer, buffer_len);
 315
 316         if (recv_checksum != calc_checksum)
 317         {
 318                 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
 319                                 "calculated 0x%04"PRIx16"\n",
 320                                 recv_checksum, calc_checksum);
 321                 return (NULL);
 322         }
 323
 324         ident = ntohs (icmp_hdr->icmp_id);
 325         seq   = ntohs (icmp_hdr->icmp_seq);
 326
 327         /* We have to iterate over all hosts, since ICMPv4 packets may
 328          * be received on any raw v4 socket. */
 329         for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
 330         {
 331                 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
 332                                 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
 333
 334                 if (ptr->addrfamily != AF_INET)
 335                         continue;
 336
 337                 if (!timerisset (ptr->timer))
 338                         continue;
 339
 340                 if (ptr->ident != ident)
 341                         continue;
 342
 343                 if (((ptr->sequence - 1) & 0xFFFF) != seq)
 344                         continue;
 345
 346                 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
 347                                 "seq = %"PRIu16"\n",
 348                                 ptr->hostname, ident, seq);
 349
 350                 break;
 351         }
 352
 353         if (ptr == NULL)
 354         {
 355                 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
 356                                 ident, seq);
 357         }
 358
 359         if (ptr != NULL){
 360                 ptr->recv_ttl = (int)     ip_hdr->ip_ttl;
 361                 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
 362         }
 363         return (ptr);
 364 }
 365
 366 #ifndef ICMP6_ECHO_REQUEST
 367 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
 368 #  define ICMP6_ECHO_REQUEST ICMP6_ECHO
 369 # else
 370 #  define ICMP6_ECHO_REQUEST 128
 371 # endif
 372 #endif
 373
 374 #ifndef ICMP6_ECHO_REPLY
 375 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
 376 #  define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
 377 # else
 378 #  define ICMP6_ECHO_REPLY 129
 379 # endif
 380 #endif
 381
 382 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
 383                 size_t buffer_len)
 384 {
 385         struct icmp6_hdr *icmp_hdr;
 386
 387         uint16_t ident;
 388         uint16_t seq;
 389
 390         pinghost_t *ptr;
 391
 392         if (buffer_len < ICMP_MINLEN)
 393                 return (NULL);
 394
 395         icmp_hdr = (struct icmp6_hdr *) buffer;
 396         buffer     += ICMP_MINLEN;
 397         buffer_len -= ICMP_MINLEN;
 398
 399         if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
 400         {
 401                 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
 402                 return (NULL);
 403         }
 404
 405         if (icmp_hdr->icmp6_code != 0)
 406         {
 407                 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
 408                 return (NULL);
 409         }
 410
 411         ident = ntohs (icmp_hdr->icmp6_id);
 412         seq   = ntohs (icmp_hdr->icmp6_seq);
 413
 414         /* We have to iterate over all hosts, since ICMPv6 packets may
 415          * be received on any raw v6 socket. */
 416         for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
 417         {
 418                 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
 419                                 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
 420
 421                 if (ptr->addrfamily != AF_INET6)
 422                         continue;
 423
 424                 if (!timerisset (ptr->timer))
 425                         continue;
 426
 427                 if (ptr->ident != ident)
 428                         continue;
 429
 430                 if (((ptr->sequence - 1) & 0xFFFF) != seq)
 431                         continue;
 432
 433                 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
 434                                 "seq = %"PRIu16"\n",
 435                                 ptr->hostname, ident, seq);
 436
 437                 break;
 438         }
 439
 440         if (ptr == NULL)
 441         {
 442                 dprintf ("No match found for ident = 0x%04"PRIx16", "
 443                                 "seq = %"PRIu16"\n",
 444                                 ident, seq);
 445         }
 446
 447         return (ptr);
 448 }
 449
 450 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
 451                 struct timeval *now)
 452 {
 453         /* Note: 'ph' is not necessarily the host object for which we receive a
 454          * reply. The right object will be returned by ping_receive_ipv*(). For
 455          * now, we can only rely on ph->fd and ph->addrfamily. */
 456
 457         struct timeval diff, pkt_now = *now;
 458         pinghost_t *host = NULL;
 459         int recv_ttl;
 460         uint8_t recv_qos;
 461
 462         /*
 463          * Set up the receive buffer..
 464          */
 465         struct msghdr msghdr;
 466         struct cmsghdr *cmsg;
 467         char payload_buffer[4096];
 468         ssize_t payload_buffer_len;
 469         char control_buffer[4096];
 470         struct iovec payload_iovec;
 471
 472         memset (&payload_iovec, 0, sizeof (payload_iovec));
 473         payload_iovec.iov_base = payload_buffer;
 474         payload_iovec.iov_len = sizeof (payload_buffer);
 475
 476         memset (&msghdr, 0, sizeof (msghdr));
 477         /* unspecified source address */
 478         msghdr.msg_name = NULL;
 479         msghdr.msg_namelen = 0;
 480         /* output buffer vector, see readv(2) */
 481         msghdr.msg_iov = &payload_iovec;
 482         msghdr.msg_iovlen = 1;
 483         /* output buffer for control messages */
 484         msghdr.msg_control = control_buffer;
 485         msghdr.msg_controllen = sizeof (control_buffer);
 486         /* flags; this is an output only field.. */
 487         msghdr.msg_flags = 0;
 488 #ifdef MSG_XPG4_2
 489         msghdr.msg_flags |= MSG_XPG4_2;
 490 #endif
 491
 492         payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
 493         if (payload_buffer_len < 0)
 494         {
 495 #if WITH_DEBUG
 496                 char errbuf[PING_ERRMSG_LEN];
 497                 dprintf ("recvfrom: %s\n",
 498                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 499 #endif
 500                 return (-1);
 501         }
 502         dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
 503
 504         /* Iterate over all auxiliary data in msghdr */
 505         recv_ttl = -1;
 506         recv_qos = 0;
 507         for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
 508                         cmsg != NULL;
 509                         cmsg = CMSG_NXTHDR (&msghdr, cmsg))
 510         {
 511                 if (cmsg->cmsg_level == SOL_SOCKET)
 512                 {
 513 #ifdef SO_TIMESTAMP
 514                         if (cmsg->cmsg_type == SO_TIMESTAMP)
 515                                 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
 516 #endif /* SO_TIMESTAMP */
 517                 }
 518                 else if (ph->addrfamily == AF_INET) /* {{{ */
 519                 {
 520                         if (cmsg->cmsg_level != IPPROTO_IP)
 521                                 continue;
 522
 523                         if (cmsg->cmsg_type == IP_TOS)
 524                         {
 525                                 memcpy (&recv_qos, CMSG_DATA (cmsg),
 526                                                 sizeof (recv_qos));
 527                                 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
 528                         } else
 529                         if (cmsg->cmsg_type == IP_TTL)
 530                         {
 531                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 532                                                 sizeof (recv_ttl));
 533                                 dprintf ("TTLv4 = %i;\n", recv_ttl);
 534                         }
 535                         else
 536                         {
 537                                 dprintf ("Not handling option %i.\n",
 538                                                 cmsg->cmsg_type);
 539                         }
 540                 } /* }}} */
 541                 else if (ph->addrfamily == AF_INET6) /* {{{ */
 542                 {
 543                         if (cmsg->cmsg_level != IPPROTO_IPV6)
 544                                 continue;
 545
 546                         if (cmsg->cmsg_type == IPV6_TCLASS)
 547                         {
 548                                 memcpy (&recv_qos, CMSG_DATA (cmsg),
 549                                                 sizeof (recv_qos));
 550                                 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
 551                         } else
 552 #ifdef IPV6_HOPLIMIT
 553                         if (cmsg->cmsg_type == IPV6_HOPLIMIT)
 554                         {
 555                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 556                                                 sizeof (recv_ttl));
 557                                 dprintf ("TTLv6 = %i;\n", recv_ttl);
 558                         }
 559                         else
 560 #endif
 561 #ifdef IPV6_UNICAST_HOPS
 562                         if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
 563                         {
 564                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 565                                                 sizeof (recv_ttl));
 566                                 dprintf ("TTLv6 = %i;\n", recv_ttl);
 567                         }
 568                         else
 569 #endif
 570 #ifdef IPV6_MULTICAST_HOPS
 571                         if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
 572                         {
 573                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 574                                                 sizeof (recv_ttl));
 575                                 dprintf ("TTLv6 = %i;\n", recv_ttl);
 576                         }
 577                         else
 578 #endif
 579                         {
 580                                 dprintf ("Not handling option %i.\n",
 581                                                 cmsg->cmsg_type);
 582                         }
 583                 } /* }}} */
 584                 else
 585                 {
 586                         dprintf ("Don't know how to handle "
 587                                         "unknown protocol %i.\n",
 588                                         cmsg->cmsg_level);
 589                 }
 590         } /* }}} for (cmsg) */
 591
 592         if (ph->addrfamily == AF_INET)
 593         {
 594                 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
 595                 if (host == NULL)
 596                         return (-1);
 597         }
 598         else if (ph->addrfamily == AF_INET6)
 599         {
 600                 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
 601                 if (host == NULL)
 602                         return (-1);
 603         }
 604         else
 605         {
 606                 dprintf ("ping_receive_one: Unknown address family %i.\n",
 607                                 ph->addrfamily);
 608                 return (-1);
 609         }
 610
 611         dprintf ("rcvd: %12i.%06i\n",
 612                         (int) pkt_now.tv_sec,
 613                         (int) pkt_now.tv_usec);
 614         dprintf ("sent: %12i.%06i\n",
 615                         (int) host->timer->tv_sec,
 616                         (int) host->timer->tv_usec);
 617
 618         if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
 619         {
 620                 timerclear (host->timer);
 621                 return (-1);
 622         }
 623
 624         dprintf ("diff: %12i.%06i\n",
 625                         (int) diff.tv_sec,
 626                         (int) diff.tv_usec);
 627
 628         if (recv_ttl >= 0)
 629                 host->recv_ttl = recv_ttl;
 630         host->recv_qos = recv_qos;
 631
 632         host->latency  = ((double) diff.tv_usec) / 1000.0;
 633         host->latency += ((double) diff.tv_sec)  * 1000.0;
 634
 635         timerclear (host->timer);
 636
 637         return (0);
 638 }
 639
 640 /* Blocks until a packet was received from all hosts or the timeout is reached.
 641  * When interrupted, (-EINTR) is returned. On error, -1 is returned. On
 642  * success, returns zero. */
 643 static int ping_receive_all (pingobj_t *obj)
 644 {
 645         fd_set read_fds;
 646         fd_set err_fds;
 647         int num_fds;
 648         int max_fd;
 649
 650         pinghost_t *ph;
 651         pinghost_t *ptr;
 652
 653         struct timeval endtime;
 654         struct timeval nowtime;
 655         struct timeval timeout;
 656         int status;
 657
 658         int ret;
 659
 660         ph = obj->head;
 661         ret = 0;
 662
 663         for (ptr = ph; ptr != NULL; ptr = ptr->next)
 664         {
 665                 ptr->latency  = -1.0;
 666                 ptr->recv_ttl = -1;
 667         }
 668
 669         if (gettimeofday (&nowtime, NULL) == -1)
 670         {
 671                 ping_set_errno (obj, errno);
 672                 return (-1);
 673         }
 674
 675         /* Set up timeout */
 676         timeout.tv_sec = (time_t) obj->timeout;
 677         timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
 678
 679         dprintf ("Set timeout to %i.%06i seconds\n",
 680                         (int) timeout.tv_sec,
 681                         (int) timeout.tv_usec);
 682
 683         ping_timeval_add (&nowtime, &timeout, &endtime);
 684
 685         while (1)
 686         {
 687                 FD_ZERO (&read_fds);
 688                 FD_ZERO (&err_fds);
 689                 num_fds =  0;
 690                 max_fd = -1;
 691
 692                 for (ptr = ph; ptr != NULL; ptr = ptr->next)
 693                 {
 694                         if (!timerisset (ptr->timer))
 695                                 continue;
 696
 697                         FD_SET (ptr->fd, &read_fds);
 698                         FD_SET (ptr->fd, &err_fds);
 699                         num_fds++;
 700
 701                         if (max_fd < ptr->fd)
 702                                 max_fd = ptr->fd;
 703                 }
 704
 705                 if (num_fds == 0)
 706                         break;
 707
 708                 if (gettimeofday (&nowtime, NULL) == -1)
 709                 {
 710                         ping_set_errno (obj, errno);
 711                         return (-1);
 712                 }
 713
 714                 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
 715                         break;
 716
 717                 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
 718                                 (int) timeout.tv_sec,
 719                                 (int) timeout.tv_usec);
 720
 721                 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
 722
 723                 if (gettimeofday (&nowtime, NULL) == -1)
 724                 {
 725                         ping_set_errno (obj, errno);
 726                         return (-1);
 727                 }
 728
 729                 if ((status == -1) && (errno == EINTR))
 730                 {
 731                         dprintf ("select was interrupted by signal..\n");
 732                         ping_set_errno (obj, EINTR);
 733                         return (-EINTR);
 734                 }
 735                 else if (status < 0)
 736                 {
 737 #if WITH_DEBUG
 738                         char errbuf[PING_ERRMSG_LEN];
 739                         dprintf ("select: %s\n",
 740                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 741 #endif
 742                         break;
 743                 }
 744                 else if (status == 0)
 745                 {
 746                         dprintf ("select timed out\n");
 747                         for (ptr = ph; ptr != NULL; ptr = ptr->next)
 748                                 if (ptr->latency < 0.0)
 749                                         ptr->dropped++;
 750                         break;
 751                 }
 752
 753                 for (ptr = ph; ptr != NULL; ptr = ptr->next)
 754                 {
 755                         if (FD_ISSET (ptr->fd, &read_fds))
 756                         {
 757                                 if (ping_receive_one (obj, ptr, &nowtime) == 0)
 758                                         ret++;
 759                         }
 760                         else if (FD_ISSET (ptr->fd, &err_fds))
 761                         {
 762                                 /* clear the timer in this case so that we
 763                                  * don't run into an endless loop. */
 764                                 /* TODO: Set an error flag in this case. */
 765                                 timerclear (ptr->timer);
 766                         }
 767                 }
 768         } /* while (1) */
 769
 770         return (ret);
 771 } /* int ping_receive_all */
 772
 773 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 774  * Sending functions:                                                        *
 775  *                                                                           *
 776  * ping_send_all                                                             *
 777  * +-> ping_send_one_ipv4                                                    *
 778  * `-> ping_send_one_ipv6                                                    *
 779  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 780 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
 781                 const void *buf, size_t buflen)
 782 {
 783         ssize_t ret;
 784
 785         if (gettimeofday (ph->timer, NULL) == -1)
 786         {
 787                 timerclear (ph->timer);
 788                 return (-1);
 789         }
 790
 791         ret = sendto (ph->fd, buf, buflen, 0,
 792                         (struct sockaddr *) ph->addr, ph->addrlen);
 793
 794         if (ret < 0)
 795         {
 796 #if defined(EHOSTUNREACH)
 797                 if (errno == EHOSTUNREACH)
 798                         return (0);
 799 #endif
 800 #if defined(ENETUNREACH)
 801                 if (errno == ENETUNREACH)
 802                         return (0);
 803 #endif
 804                 ping_set_errno (obj, errno);
 805         }
 806
 807         return (ret);
 808 }
 809
 810 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
 811 {
 812         struct icmp *icmp4;
 813         int status;
 814
 815         char   buf[4096] = {0};
 816         size_t buflen;
 817
 818         char *data;
 819         size_t datalen;
 820
 821         dprintf ("ph->hostname = %s\n", ph->hostname);
 822
 823         icmp4 = (struct icmp *) buf;
 824         *icmp4 = (struct icmp) {
 825                 .icmp_type = ICMP_ECHO,
 826                 .icmp_id   = htons (ph->ident),
 827                 .icmp_seq  = htons (ph->sequence),
 828         };
 829
 830         datalen = strlen (ph->data);
 831         buflen = ICMP_MINLEN + datalen;
 832         if (sizeof (buf) < buflen)
 833                 return (EINVAL);
 834
 835         data  = buf + ICMP_MINLEN;
 836         memcpy (data, ph->data, datalen);
 837
 838         icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
 839
 840         dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
 841
 842         status = ping_sendto (obj, ph, buf, buflen);
 843         if (status < 0)
 844         {
 845                 perror ("ping_sendto");
 846                 return (-1);
 847         }
 848
 849         dprintf ("sendto: status = %i\n", status);
 850
 851         return (0);
 852 }
 853
 854 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
 855 {
 856         struct icmp6_hdr *icmp6;
 857         int status;
 858
 859         char buf[4096] = {0};
 860         int  buflen;
 861
 862         char *data;
 863         int   datalen;
 864
 865         dprintf ("ph->hostname = %s\n", ph->hostname);
 866
 867         icmp6 = (struct icmp6_hdr *) buf;
 868         *icmp6 = (struct icmp6_hdr) {
 869                 .icmp6_type  = ICMP6_ECHO_REQUEST,
 870                 .icmp6_id    = htons (ph->ident),
 871                 .icmp6_seq   = htons (ph->sequence),
 872         };
 873
 874         datalen = strlen (ph->data);
 875         buflen = sizeof (*icmp6) + datalen;
 876         if (sizeof (buf) < buflen)
 877                 return (EINVAL);
 878
 879         data  = buf + ICMP_MINLEN;
 880         memcpy (data, ph->data, datalen);
 881
 882         /* The checksum will be calculated by the TCP/IP stack. */
 883
 884         dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
 885
 886         status = ping_sendto (obj, ph, buf, buflen);
 887         if (status < 0)
 888         {
 889                 perror ("ping_sendto");
 890                 return (-1);
 891         }
 892
 893         dprintf ("sendto: status = %i\n", status);
 894
 895         return (0);
 896 }
 897
 898 static int ping_send_all (pingobj_t *obj)
 899 {
 900         pinghost_t *ph;
 901         pinghost_t *ptr;
 902
 903         int ret;
 904
 905         ret = 0;
 906         ph = obj->head;
 907
 908         for (ptr = ph; ptr != NULL; ptr = ptr->next)
 909         {
 910                 /* start timer.. The GNU `ping6' starts the timer before
 911                  * sending the packet, so I will do that too */
 912                 if (gettimeofday (ptr->timer, NULL) == -1)
 913                 {
 914 #if WITH_DEBUG
 915                         char errbuf[PING_ERRMSG_LEN];
 916                         dprintf ("gettimeofday: %s\n",
 917                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 918 #endif
 919                         timerclear (ptr->timer);
 920                         ret--;
 921                         continue;
 922                 }
 923                 else
 924                 {
 925                         dprintf ("timer set for hostname = %s\n", ptr->hostname);
 926                 }
 927
 928                 if (ptr->addrfamily == AF_INET6)
 929                 {
 930                         dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
 931                         if (ping_send_one_ipv6 (obj, ptr) != 0)
 932                         {
 933                                 timerclear (ptr->timer);
 934                                 ret--;
 935                                 continue;
 936                         }
 937                 }
 938                 else if (ptr->addrfamily == AF_INET)
 939                 {
 940                         dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
 941                         if (ping_send_one_ipv4 (obj, ptr) != 0)
 942                         {
 943                                 timerclear (ptr->timer);
 944                                 ret--;
 945                                 continue;
 946                         }
 947                 }
 948                 else /* this should not happen */
 949                 {
 950                         dprintf ("Unknown address family: %i\n", ptr->addrfamily);
 951                         timerclear (ptr->timer);
 952                         ret--;
 953                         continue;
 954                 }
 955
 956                 ptr->sequence++;
 957         }
 958
 959         return (ret);
 960 }
 961
 962 /*
 963  * Set the TTL of a socket protocol independently.
 964  */
 965 static int ping_set_ttl (pinghost_t *ph, int ttl)
 966 {
 967         int ret = -2;
 968
 969         if (ph->addrfamily == AF_INET)
 970         {
 971                 dprintf ("Setting TTLv4 to %i\n", ttl);
 972                 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
 973                                 &ttl, sizeof (ttl));
 974         }
 975         else if (ph->addrfamily == AF_INET6)
 976         {
 977                 dprintf ("Setting TTLv6 to %i\n", ttl);
 978                 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 979                                 &ttl, sizeof (ttl));
 980         }
 981
 982         return (ret);
 983 }
 984
 985 /*
 986  * Set the TOS of a socket protocol independently.
 987  *
 988  * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
 989  * set this. See socket(7) for details.
 990  */
 991 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
 992 {
 993         int ret = EINVAL;
 994         char errbuf[PING_ERRMSG_LEN];
 995
 996         if (ph->addrfamily == AF_INET)
 997         {
 998                 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
 999                 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
1000                                 &qos, sizeof (qos));
1001                 if (ret != 0)
1002                 {
1003                         ret = errno;
1004                         ping_set_error (obj, "ping_set_qos",
1005                                         sstrerror (ret, errbuf, sizeof (errbuf)));
1006                         dprintf ("Setting TP_TOS failed: %s\n", errbuf);
1007                 }
1008         }
1009         else if (ph->addrfamily == AF_INET6)
1010         {
1011                 /* IPV6_TCLASS requires an "int". */
1012                 int tmp = (int) qos;
1013
1014                 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
1015                 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
1016                                 &tmp, sizeof (tmp));
1017                 if (ret != 0)
1018                 {
1019                         ret = errno;
1020                         ping_set_error (obj, "ping_set_qos",
1021                                         sstrerror (ret, errbuf, sizeof (errbuf)));
1022                         dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1023                 }
1024         }
1025
1026         return (ret);
1027 }
1028
1029 static int ping_get_ident (void)
1030 {
1031         int fd;
1032         static int did_seed = 0;
1033
1034         int retval;
1035
1036         if (did_seed == 0)
1037         {
1038                 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1039                 {
1040                         unsigned int seed;
1041
1042                         if (read (fd, &seed, sizeof (seed)) != -1)
1043                         {
1044                                 did_seed = 1;
1045                                 dprintf ("Random seed:   %#x\n", seed);
1046                                 srandom (seed);
1047                         }
1048
1049                         close (fd);
1050                 }
1051 #if WITH_DEBUG
1052                 else
1053                 {
1054                         char errbuf[PING_ERRMSG_LEN];
1055                         dprintf ("open (/dev/urandom): %s\n",
1056                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1057                 }
1058 #endif
1059         }
1060
1061         retval = (int) random ();
1062
1063         dprintf ("Random number: %#x\n", retval);
1064
1065         return (retval);
1066 }
1067
1068 static pinghost_t *ping_alloc (void)
1069 {
1070         pinghost_t *ph;
1071         size_t      ph_size;
1072
1073         ph_size = sizeof (pinghost_t)
1074                 + sizeof (struct sockaddr_storage)
1075                 + sizeof (struct timeval);
1076
1077         ph = (pinghost_t *) malloc (ph_size);
1078         if (ph == NULL)
1079                 return (NULL);
1080
1081         memset (ph, '\0', ph_size);
1082
1083         ph->timer   = (struct timeval *) (ph + 1);
1084         ph->addr    = (struct sockaddr_storage *) (ph->timer + 1);
1085
1086         ph->addrlen = sizeof (struct sockaddr_storage);
1087         ph->fd      = -1;
1088         ph->latency = -1.0;
1089         ph->dropped = 0;
1090         ph->ident   = ping_get_ident () & 0xFFFF;
1091
1092         return (ph);
1093 }
1094
1095 static void ping_free (pinghost_t *ph)
1096 {
1097         if (ph->fd >= 0)
1098                 close (ph->fd);
1099
1100         if (ph->username != NULL)
1101                 free (ph->username);
1102
1103         if (ph->hostname != NULL)
1104                 free (ph->hostname);
1105
1106         if (ph->data != NULL)
1107                 free (ph->data);
1108
1109         free (ph);
1110 }
1111
1112 /*
1113  * public methods
1114  */
1115 const char *ping_get_error (pingobj_t *obj)
1116 {
1117         if (obj == NULL)
1118                 return (NULL);
1119         return (obj->errmsg);
1120 }
1121
1122 pingobj_t *ping_construct (void)
1123 {
1124         pingobj_t *obj;
1125
1126         if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1127                 return (NULL);
1128         memset (obj, 0, sizeof (pingobj_t));
1129
1130         obj->timeout    = PING_DEF_TIMEOUT;
1131         obj->ttl        = PING_DEF_TTL;
1132         obj->addrfamily = PING_DEF_AF;
1133         obj->data       = strdup (PING_DEF_DATA);
1134         obj->qos        = 0;
1135
1136         return (obj);
1137 }
1138
1139 void ping_destroy (pingobj_t *obj)
1140 {
1141         pinghost_t *current;
1142         pinghost_t *next;
1143
1144         if (obj == NULL)
1145                 return;
1146
1147         current = obj->head;
1148         next = NULL;
1149
1150         while (current != NULL)
1151         {
1152                 next = current->next;
1153                 ping_free (current);
1154                 current = next;
1155         }
1156
1157         if (obj->data != NULL)
1158                 free (obj->data);
1159
1160         if (obj->srcaddr != NULL)
1161                 free (obj->srcaddr);
1162
1163         if (obj->device != NULL)
1164                 free (obj->device);
1165
1166         free (obj);
1167
1168         return;
1169 }
1170
1171 int ping_setopt (pingobj_t *obj, int option, void *value)
1172 {
1173         int ret = 0;
1174
1175         if ((obj == NULL) || (value == NULL))
1176                 return (-1);
1177
1178         switch (option)
1179         {
1180                 case PING_OPT_QOS:
1181                 {
1182                         pinghost_t *ph;
1183
1184                         obj->qos = *((uint8_t *) value);
1185                         for (ph = obj->head; ph != NULL; ph = ph->next)
1186                                 ping_set_qos (obj, ph, obj->qos);
1187                         break;
1188                 }
1189
1190                 case PING_OPT_TIMEOUT:
1191                         obj->timeout = *((double *) value);
1192                         if (obj->timeout < 0.0)
1193                         {
1194                                 obj->timeout = PING_DEF_TIMEOUT;
1195                                 ret = -1;
1196                         }
1197                         break;
1198
1199                 case PING_OPT_TTL:
1200                         obj->ttl = *((int *) value);
1201                         if ((obj->ttl < 1) || (obj->ttl > 255))
1202                         {
1203                                 obj->ttl = PING_DEF_TTL;
1204                                 ret = -1;
1205                         }
1206                         else
1207                         {
1208                                 pinghost_t *ph;
1209
1210                                 for (ph = obj->head; ph != NULL; ph = ph->next)
1211                                         ping_set_ttl (ph, obj->ttl);
1212                         }
1213                         break;
1214
1215                 case PING_OPT_AF:
1216                         obj->addrfamily = *((int *) value);
1217                         if ((obj->addrfamily != AF_UNSPEC)
1218                                         && (obj->addrfamily != AF_INET)
1219                                         && (obj->addrfamily != AF_INET6))
1220                         {
1221                                 obj->addrfamily = PING_DEF_AF;
1222                                 ret = -1;
1223                         }
1224                         if (obj->srcaddr != NULL)
1225                         {
1226                                 free (obj->srcaddr);
1227                                 obj->srcaddr = NULL;
1228                         }
1229                         break;
1230
1231                 case PING_OPT_DATA:
1232                         if (obj->data != NULL)
1233                         {
1234                                 free (obj->data);
1235                                 obj->data = NULL;
1236                         }
1237                         obj->data = strdup ((const char *) value);
1238                         break;
1239
1240                 case PING_OPT_SOURCE:
1241                 {
1242                         char            *hostname = (char *) value;
1243                         struct addrinfo  ai_hints;
1244                         struct addrinfo *ai_list;
1245                         int              status;
1246 #if WITH_DEBUG
1247                         if (obj->addrfamily != AF_UNSPEC)
1248                         {
1249                                 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1250                         }
1251 #endif
1252                         memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1253                         ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1254 #if defined(AI_ADDRCONFIG)
1255                         ai_hints.ai_flags = AI_ADDRCONFIG;
1256 #endif
1257                         status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1258                         if (status != 0)
1259                         {
1260 #if defined(EAI_SYSTEM)
1261                                 char errbuf[PING_ERRMSG_LEN];
1262 #endif
1263                                 ping_set_error (obj, "getaddrinfo",
1264 #if defined(EAI_SYSTEM)
1265                                                 (status == EAI_SYSTEM)
1266                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1267 #endif
1268                                                 gai_strerror (status));
1269                                 ret = -1;
1270                                 break;
1271                         }
1272 #if WITH_DEBUG
1273                         if (ai_list->ai_next != NULL)
1274                         {
1275                                 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1276                         }
1277 #endif
1278                         if (obj->srcaddr == NULL)
1279                         {
1280                                 obj->srcaddrlen = 0;
1281                                 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1282                                 if (obj->srcaddr == NULL)
1283                                 {
1284                                         ping_set_errno (obj, errno);
1285                                         ret = -1;
1286                                         freeaddrinfo (ai_list);
1287                                         break;
1288                                 }
1289                         }
1290                         memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1291                         assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1292                         memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1293                                         ai_list->ai_addrlen);
1294                         obj->srcaddrlen = ai_list->ai_addrlen;
1295                         obj->addrfamily = ai_list->ai_family;
1296
1297                         freeaddrinfo (ai_list);
1298                 } /* case PING_OPT_SOURCE */
1299                 break;
1300
1301                 case PING_OPT_DEVICE:
1302                 {
1303 #ifdef SO_BINDTODEVICE
1304                         char *device = strdup ((char *) value);
1305
1306                         if (device == NULL)
1307                         {
1308                                 ping_set_errno (obj, errno);
1309                                 ret = -1;
1310                                 break;
1311                         }
1312
1313                         if (obj->device != NULL)
1314                                 free (obj->device);
1315                         obj->device = device;
1316 #else /* ! SO_BINDTODEVICE */
1317                         ping_set_errno (obj, ENOTSUP);
1318                         ret = -1;
1319 #endif /* ! SO_BINDTODEVICE */
1320                 } /* case PING_OPT_DEVICE */
1321                 break;
1322
1323                 case PING_OPT_MARK:
1324                 {
1325 #ifdef SO_MARK
1326                         obj->mark     = *(int*)(value);
1327                         obj->set_mark = 1;
1328 #else /* SO_MARK */
1329                         ping_set_errno (obj, ENOTSUP);
1330                         ret = -1;
1331 #endif /* !SO_MARK */
1332
1333                 } /* case PING_OPT_MARK */
1334                 break;
1335
1336                 default:
1337                         ret = -2;
1338         } /* switch (option) */
1339
1340         return (ret);
1341 } /* int ping_setopt */
1342
1343
1344 int ping_send (pingobj_t *obj)
1345 {
1346         if (obj == NULL)
1347                 return (-1);
1348
1349         if (ping_send_all (obj) < 0)
1350                 return (-1);
1351
1352         return (ping_receive_all (obj));
1353 }
1354
1355 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1356 {
1357         while (ph != NULL)
1358         {
1359                 if (strcasecmp (ph->username, host) == 0)
1360                         break;
1361
1362                 ph = ph->next;
1363         }
1364
1365         return (ph);
1366 }
1367
1368 int ping_host_add (pingobj_t *obj, const char *host)
1369 {
1370         pinghost_t *ph;
1371
1372         struct addrinfo  ai_hints;
1373         struct addrinfo *ai_list, *ai_ptr;
1374         int              ai_return;
1375
1376         if ((obj == NULL) || (host == NULL))
1377                 return (-1);
1378
1379         dprintf ("host = %s\n", host);
1380
1381         if (ping_host_search (obj->head, host) != NULL)
1382                 return (0);
1383
1384         memset (&ai_hints, '\0', sizeof (ai_hints));
1385         ai_hints.ai_flags     = 0;
1386 #ifdef AI_ADDRCONFIG
1387         ai_hints.ai_flags    |= AI_ADDRCONFIG;
1388 #endif
1389 #ifdef AI_CANONNAME
1390         ai_hints.ai_flags    |= AI_CANONNAME;
1391 #endif
1392         ai_hints.ai_family    = obj->addrfamily;
1393         ai_hints.ai_socktype  = SOCK_RAW;
1394
1395         if ((ph = ping_alloc ()) == NULL)
1396         {
1397                 dprintf ("Out of memory!\n");
1398                 return (-1);
1399         }
1400
1401         if ((ph->username = strdup (host)) == NULL)
1402         {
1403                 dprintf ("Out of memory!\n");
1404                 ping_set_errno (obj, errno);
1405                 ping_free (ph);
1406                 return (-1);
1407         }
1408
1409         if ((ph->hostname = strdup (host)) == NULL)
1410         {
1411                 dprintf ("Out of memory!\n");
1412                 ping_set_errno (obj, errno);
1413                 ping_free (ph);
1414                 return (-1);
1415         }
1416
1417         /* obj->data is not garuanteed to be != NULL */
1418         if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1419         {
1420                 dprintf ("Out of memory!\n");
1421                 ping_set_errno (obj, errno);
1422                 ping_free (ph);
1423                 return (-1);
1424         }
1425
1426         if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1427         {
1428 #if defined(EAI_SYSTEM)
1429                 char errbuf[PING_ERRMSG_LEN];
1430 #endif
1431                 dprintf ("getaddrinfo failed\n");
1432                 ping_set_error (obj, "getaddrinfo",
1433 #if defined(EAI_SYSTEM)
1434                                                 (ai_return == EAI_SYSTEM)
1435                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1436 #endif
1437                                 gai_strerror (ai_return));
1438                 ping_free (ph);
1439                 return (-1);
1440         }
1441
1442         if (ai_list == NULL)
1443                 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1444
1445         for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1446         {
1447                 ph->fd = -1;
1448
1449                 if (ai_ptr->ai_family == AF_INET)
1450                 {
1451                         ai_ptr->ai_socktype = SOCK_RAW;
1452                         ai_ptr->ai_protocol = IPPROTO_ICMP;
1453                 }
1454                 else if (ai_ptr->ai_family == AF_INET6)
1455                 {
1456                         ai_ptr->ai_socktype = SOCK_RAW;
1457                         ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1458                 }
1459                 else
1460                 {
1461                         char errmsg[PING_ERRMSG_LEN];
1462
1463                         snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1464                         errmsg[PING_ERRMSG_LEN - 1] = '\0';
1465
1466                         dprintf ("%s", errmsg);
1467                         ping_set_error (obj, "getaddrinfo", errmsg);
1468                         continue;
1469                 }
1470
1471                 /* TODO: Move this to a static function `ping_open_socket' and
1472                  * call it whenever the socket dies. */
1473                 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1474                 if (ph->fd == -1)
1475                 {
1476 #if WITH_DEBUG
1477                         char errbuf[PING_ERRMSG_LEN];
1478                         dprintf ("socket: %s\n",
1479                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1480 #endif
1481                         ping_set_errno (obj, errno);
1482                         continue;
1483                 }
1484
1485                 if (obj->srcaddr != NULL)
1486                 {
1487                         assert (obj->srcaddrlen > 0);
1488                         assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1489
1490                         if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1491                         {
1492 #if WITH_DEBUG
1493                                 char errbuf[PING_ERRMSG_LEN];
1494                                 dprintf ("bind: %s\n",
1495                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1496 #endif
1497                                 ping_set_errno (obj, errno);
1498                                 close (ph->fd);
1499                                 ph->fd = -1;
1500                                 continue;
1501                         }
1502                 }
1503
1504 #ifdef SO_BINDTODEVICE
1505                 if (obj->device != NULL)
1506                 {
1507                         if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1508                                         obj->device, strlen (obj->device) + 1) != 0)
1509                         {
1510 #if WITH_DEBUG
1511                                 char errbuf[PING_ERRMSG_LEN];
1512                                 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1513                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1514 #endif
1515                                 ping_set_errno (obj, errno);
1516                                 close (ph->fd);
1517                                 ph->fd = -1;
1518                                 continue;
1519                         }
1520                 }
1521 #endif /* SO_BINDTODEVICE */
1522 #ifdef SO_MARK
1523                 if(obj->set_mark)
1524                 {
1525                         if(setsockopt(ph->fd, SOL_SOCKET, SO_MARK, &(obj->mark), sizeof(obj->mark)) != 0)
1526                         {
1527 #if WITH_DEBUG
1528                                 char errbuf[PING_ERRMSG_LEN];
1529                                 dprintf ("setsockopt (SO_MARK): %s\n",
1530                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1531 #endif
1532                                 ping_set_errno (obj, errno);
1533                                 close (ph->fd);
1534                                 ph->fd = -1;
1535                                 continue;
1536                         }
1537                 }
1538 #endif
1539 #ifdef SO_TIMESTAMP
1540                 if (1) /* {{{ */
1541                 {
1542                         int status;
1543                         int opt = 1;
1544
1545                         status = setsockopt (ph->fd,
1546                                         SOL_SOCKET, SO_TIMESTAMP,
1547                                         &opt, sizeof (opt));
1548                         if (status != 0)
1549                         {
1550 #if WITH_DEBUG
1551                                 char errbuf[PING_ERRMSG_LEN];
1552                                 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1553                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1554 #endif
1555                                 ping_set_errno (obj, errno);
1556                                 close (ph->fd);
1557                                 ph->fd = -1;
1558                                 continue;
1559                         }
1560                 } /* }}} if (1) */
1561 #endif /* SO_TIMESTAMP */
1562                 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1563                 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1564                 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1565                 ph->addrlen = ai_ptr->ai_addrlen;
1566                 ph->addrfamily = ai_ptr->ai_family;
1567
1568 #ifdef AI_CANONNAME
1569                 if ((ai_ptr->ai_canonname != NULL)
1570                                 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1571                 {
1572                         char *old_hostname;
1573
1574                         dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1575                                         ph->hostname, ai_ptr->ai_canonname);
1576
1577                         old_hostname = ph->hostname;
1578                         if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1579                         {
1580                                 /* strdup failed, falling back to old hostname */
1581                                 ph->hostname = old_hostname;
1582                         }
1583                         else if (old_hostname != NULL)
1584                         {
1585                                 free (old_hostname);
1586                         }
1587                 }
1588 #endif /* AI_CANONNAME */
1589
1590                 if (ph->addrfamily == AF_INET)
1591                 {
1592                         int opt;
1593
1594 #ifdef IP_RECVTOS
1595                         /* Enable receiving the TOS field */
1596                         opt = 1;
1597                         setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1598                                         &opt, sizeof (opt));
1599 #endif  /* IP_RECVTOS */
1600
1601                         /* Enable receiving the TTL field */
1602                         opt = 1;
1603                         setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1604                                         &opt, sizeof (opt));
1605                 }
1606 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1607                 else if (ph->addrfamily == AF_INET6)
1608                 {
1609                         int opt;
1610
1611 # if defined(IPV6_RECVHOPLIMIT)
1612                         /* For details see RFC 3542, section 6.3. */
1613                         opt = 1;
1614                         setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1615                                         &opt, sizeof (opt));
1616 # endif /* IPV6_RECVHOPLIMIT */
1617
1618 # if defined(IPV6_RECVTCLASS)
1619                         /* For details see RFC 3542, section 6.5. */
1620                         opt = 1;
1621                         setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1622                                         &opt, sizeof (opt));
1623 # endif /* IPV6_RECVTCLASS */
1624                 }
1625 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1626
1627                 break;
1628         } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1629
1630         freeaddrinfo (ai_list);
1631
1632         if (ph->fd < 0)
1633         {
1634                 ping_free (ph);
1635                 return (-1);
1636         }
1637
1638         /*
1639          * Adding in the front is much easier, but then the iterator will
1640          * return the host that was added last as first host. That's just not
1641          * nice. -octo
1642          */
1643         if (obj->head == NULL)
1644         {
1645                 obj->head = ph;
1646         }
1647         else
1648         {
1649                 pinghost_t *hptr;
1650
1651                 hptr = obj->head;
1652                 while (hptr->next != NULL)
1653                         hptr = hptr->next;
1654
1655                 assert ((hptr != NULL) && (hptr->next == NULL));
1656                 hptr->next = ph;
1657         }
1658
1659         ping_set_ttl (ph, obj->ttl);
1660         ping_set_qos (obj, ph, obj->qos);
1661
1662         return (0);
1663 } /* int ping_host_add */
1664
1665 int ping_host_remove (pingobj_t *obj, const char *host)
1666 {
1667         pinghost_t *pre, *cur;
1668
1669         if ((obj == NULL) || (host == NULL))
1670                 return (-1);
1671
1672         pre = NULL;
1673         cur = obj->head;
1674
1675         while (cur != NULL)
1676         {
1677                 if (strcasecmp (host, cur->username) == 0)
1678                         break;
1679
1680                 pre = cur;
1681                 cur = cur->next;
1682         }
1683
1684         if (cur == NULL)
1685         {
1686                 ping_set_error (obj, "ping_host_remove", "Host not found");
1687                 return (-1);
1688         }
1689
1690         if (pre == NULL)
1691                 obj->head = cur->next;
1692         else
1693                 pre->next = cur->next;
1694
1695         ping_free (cur);
1696
1697         return (0);
1698 }
1699
1700 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1701 {
1702         if (obj == NULL)
1703                 return (NULL);
1704         return ((pingobj_iter_t *) obj->head);
1705 }
1706
1707 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1708 {
1709         if (iter == NULL)
1710                 return (NULL);
1711         return ((pingobj_iter_t *) iter->next);
1712 }
1713
1714 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1715                 void *buffer, size_t *buffer_len)
1716 {
1717         int ret = EINVAL;
1718
1719         size_t orig_buffer_len = *buffer_len;
1720
1721         if ((iter == NULL) || (buffer_len == NULL))
1722                 return (-1);
1723
1724         if ((buffer == NULL) && (*buffer_len != 0 ))
1725                 return (-1);
1726
1727         switch (info)
1728         {
1729                 case PING_INFO_USERNAME:
1730                         ret = ENOMEM;
1731                         *buffer_len = strlen (iter->username) + 1;
1732                         if (orig_buffer_len <= *buffer_len)
1733                                 break;
1734                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1735                          * will copy `*buffer_len' and pad the rest of
1736                          * `buffer' with null-bytes */
1737                         strncpy (buffer, iter->username, orig_buffer_len);
1738                         ret = 0;
1739                         break;
1740
1741                 case PING_INFO_HOSTNAME:
1742                         ret = ENOMEM;
1743                         *buffer_len = strlen (iter->hostname) + 1;
1744                         if (orig_buffer_len < *buffer_len)
1745                                 break;
1746                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1747                          * will copy `*buffer_len' and pad the rest of
1748                          * `buffer' with null-bytes */
1749                         strncpy (buffer, iter->hostname, orig_buffer_len);
1750                         ret = 0;
1751                         break;
1752
1753                 case PING_INFO_ADDRESS:
1754                         ret = getnameinfo ((struct sockaddr *) iter->addr,
1755                                         iter->addrlen,
1756                                         (char *) buffer,
1757                                         *buffer_len,
1758                                         NULL, 0,
1759                                         NI_NUMERICHOST);
1760                         if (ret != 0)
1761                         {
1762                                 if ((ret == EAI_MEMORY)
1763 #ifdef EAI_OVERFLOW
1764                                                 || (ret == EAI_OVERFLOW)
1765 #endif
1766                                    )
1767                                         ret = ENOMEM;
1768 #if defined(EAI_SYSTEM)
1769                                 else if (ret == EAI_SYSTEM)
1770                                         ret = errno;
1771 #endif
1772                                 else
1773                                         ret = EINVAL;
1774                         }
1775                         break;
1776
1777                 case PING_INFO_FAMILY:
1778                         ret = ENOMEM;
1779                         *buffer_len = sizeof (int);
1780                         if (orig_buffer_len < sizeof (int))
1781                                 break;
1782                         *((int *) buffer) = iter->addrfamily;
1783                         ret = 0;
1784                         break;
1785
1786                 case PING_INFO_LATENCY:
1787                         ret = ENOMEM;
1788                         *buffer_len = sizeof (double);
1789                         if (orig_buffer_len < sizeof (double))
1790                                 break;
1791                         *((double *) buffer) = iter->latency;
1792                         ret = 0;
1793                         break;
1794
1795                 case PING_INFO_DROPPED:
1796                         ret = ENOMEM;
1797                         *buffer_len = sizeof (uint32_t);
1798                         if (orig_buffer_len < sizeof (uint32_t))
1799                                 break;
1800                         *((uint32_t *) buffer) = iter->dropped;
1801                         ret = 0;
1802                         break;
1803
1804                 case PING_INFO_SEQUENCE:
1805                         ret = ENOMEM;
1806                         *buffer_len = sizeof (unsigned int);
1807                         if (orig_buffer_len < sizeof (unsigned int))
1808                                 break;
1809                         *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1810                         ret = 0;
1811                         break;
1812
1813                 case PING_INFO_IDENT:
1814                         ret = ENOMEM;
1815                         *buffer_len = sizeof (uint16_t);
1816                         if (orig_buffer_len < sizeof (uint16_t))
1817                                 break;
1818                         *((uint16_t *) buffer) = (uint16_t) iter->ident;
1819                         ret = 0;
1820                         break;
1821
1822                 case PING_INFO_DATA:
1823                         ret = ENOMEM;
1824                         *buffer_len = strlen (iter->data);
1825                         if (orig_buffer_len < *buffer_len)
1826                                 break;
1827                         strncpy ((char *) buffer, iter->data, orig_buffer_len);
1828                         ret = 0;
1829                         break;
1830
1831                 case PING_INFO_RECV_TTL:
1832                         ret = ENOMEM;
1833                         *buffer_len = sizeof (int);
1834                         if (orig_buffer_len < sizeof (int))
1835                                 break;
1836                         *((int *) buffer) = iter->recv_ttl;
1837                         ret = 0;
1838                         break;
1839
1840                 case PING_INFO_RECV_QOS:
1841                         ret = ENOMEM;
1842                         if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1843                         if (!*buffer_len) *buffer_len=1;
1844                         if (orig_buffer_len < *buffer_len)
1845                                 break;
1846                         memcpy(buffer,&iter->recv_qos,*buffer_len);
1847                         ret = 0;
1848                         break;
1849         }
1850
1851         return (ret);
1852 } /* ping_iterator_get_info */
1853
1854 void *ping_iterator_get_context (pingobj_iter_t *iter)
1855 {
1856         if (iter == NULL)
1857                 return (NULL);
1858         return (iter->context);
1859 }
1860
1861 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1862 {
1863         if (iter == NULL)
1864                 return;
1865         iter->context = context;
1866 }