src/liboping.c

   1 /**
   2  * Object oriented C module to send ICMP and ICMPv6 `echo's.
   3  * Copyright (C) 2006-2011  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                     errmsg[PING_ERRMSG_LEN];
 146
 147         pinghost_t              *head;
 148 };
 149
 150 /*
 151  * private (static) functions
 152  */
 153 /* Even though Posix requires "strerror_r" to return an "int",
 154  * some systems (e.g. the GNU libc) return a "char *" _and_
 155  * ignore the second argument ... -tokkee */
 156 static char *sstrerror (int errnum, char *buf, size_t buflen)
 157 {
 158         buf[0] = 0;
 159
 160 #if !HAVE_STRERROR_R
 161         {
 162                 snprintf (buf, buflen, "Error %i (%#x)", errnum, errnum);
 163         }
 164 /* #endif !HAVE_STRERROR_R */
 165
 166 #elif STRERROR_R_CHAR_P
 167         {
 168                 char *temp;
 169                 temp = strerror_r (errnum, buf, buflen);
 170                 if (buf[0] == 0)
 171                 {
 172                         if ((temp != NULL) && (temp != buf) && (temp[0] != 0))
 173                                 strncpy (buf, temp, buflen);
 174                         else
 175                                 strncpy (buf, "strerror_r did not return "
 176                                                 "an error message", buflen);
 177                 }
 178         }
 179 /* #endif STRERROR_R_CHAR_P */
 180
 181 #else
 182         if (strerror_r (errnum, buf, buflen) != 0)
 183         {
 184                 snprintf (buf, buflen, "Error %i (%#x); "
 185                                 "Additionally, strerror_r failed.",
 186                                 errnum, errnum);
 187         }
 188 #endif /* STRERROR_R_CHAR_P */
 189
 190         buf[buflen - 1] = 0;
 191
 192         return (buf);
 193 } /* char *sstrerror */
 194
 195 static void ping_set_error (pingobj_t *obj, const char *function,
 196                 const char *message)
 197 {
 198         snprintf (obj->errmsg, sizeof (obj->errmsg),
 199                         "%s: %s", function, message);
 200         obj->errmsg[sizeof (obj->errmsg) - 1] = 0;
 201 }
 202
 203 static void ping_set_errno (pingobj_t *obj, int error_number)
 204 {
 205         sstrerror (error_number, obj->errmsg, sizeof (obj->errmsg));
 206 }
 207
 208 static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
 209                 struct timeval *res)
 210 {
 211         res->tv_sec  = tv1->tv_sec  + tv2->tv_sec;
 212         res->tv_usec = tv1->tv_usec + tv2->tv_usec;
 213
 214         while (res->tv_usec > 1000000)
 215         {
 216                 res->tv_usec -= 1000000;
 217                 res->tv_sec++;
 218         }
 219
 220         return (0);
 221 }
 222
 223 static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
 224                 struct timeval *res)
 225 {
 226         if ((tv1->tv_sec < tv2->tv_sec)
 227                         || ((tv1->tv_sec == tv2->tv_sec)
 228                                 && (tv1->tv_usec < tv2->tv_usec)))
 229                 return (-1);
 230
 231         res->tv_sec  = tv1->tv_sec  - tv2->tv_sec;
 232         res->tv_usec = tv1->tv_usec - tv2->tv_usec;
 233
 234         assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec >= 0)));
 235
 236         while (res->tv_usec < 0)
 237         {
 238                 res->tv_usec += 1000000;
 239                 res->tv_sec--;
 240         }
 241
 242         return (0);
 243 }
 244
 245 static uint16_t ping_icmp4_checksum (char *buf, size_t len)
 246 {
 247         uint32_t sum = 0;
 248         uint16_t ret = 0;
 249
 250         uint16_t *ptr;
 251
 252         for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
 253                 sum += *ptr;
 254
 255         if (len == 1)
 256         {
 257                 *(char *) &ret = *(char *) ptr;
 258                 sum += ret;
 259         }
 260
 261         /* Do this twice to get all possible carries.. */
 262         sum = (sum >> 16) + (sum & 0xFFFF);
 263         sum = (sum >> 16) + (sum & 0xFFFF);
 264
 265         ret = ~sum;
 266
 267         return (ret);
 268 }
 269
 270 static pinghost_t *ping_receive_ipv4 (pingobj_t *obj, char *buffer,
 271                 size_t buffer_len)
 272 {
 273         struct ip *ip_hdr;
 274         struct icmp *icmp_hdr;
 275
 276         size_t ip_hdr_len;
 277
 278         uint16_t recv_checksum;
 279         uint16_t calc_checksum;
 280
 281         uint16_t ident;
 282         uint16_t seq;
 283
 284         pinghost_t *ptr;
 285
 286         if (buffer_len < sizeof (struct ip))
 287                 return (NULL);
 288
 289         ip_hdr     = (struct ip *) buffer;
 290         ip_hdr_len = ip_hdr->ip_hl << 2;
 291
 292         if (buffer_len < ip_hdr_len)
 293                 return (NULL);
 294
 295         buffer     += ip_hdr_len;
 296         buffer_len -= ip_hdr_len;
 297
 298         if (buffer_len < sizeof (struct icmp))
 299                 return (NULL);
 300
 301         icmp_hdr = (struct icmp *) buffer;
 302         buffer     += sizeof (struct icmp);
 303         buffer_len -= sizeof (struct icmp);
 304
 305         if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
 306         {
 307                 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
 308                 return (NULL);
 309         }
 310
 311         recv_checksum = icmp_hdr->icmp_cksum;
 312         icmp_hdr->icmp_cksum = 0;
 313         calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
 314                         sizeof (struct icmp) + 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 < sizeof (struct icmp6_hdr))
 393                 return (NULL);
 394
 395         icmp_hdr = (struct icmp6_hdr *) buffer;
 396         buffer     += sizeof (struct icmp);
 397         buffer_len -= sizeof (struct icmp);
 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];
 816         int  buflen;
 817
 818         char *data;
 819         int   datalen;
 820
 821         dprintf ("ph->hostname = %s\n", ph->hostname);
 822
 823         memset (buf, '\0', sizeof (buf));
 824         icmp4 = (struct icmp *) buf;
 825         data  = (char *) (icmp4 + 1);
 826
 827         icmp4->icmp_type  = ICMP_ECHO;
 828         icmp4->icmp_code  = 0;
 829         icmp4->icmp_cksum = 0;
 830         icmp4->icmp_id    = htons (ph->ident);
 831         icmp4->icmp_seq   = htons (ph->sequence);
 832
 833         buflen = 4096 - sizeof (struct icmp);
 834         strncpy (data, ph->data, buflen);
 835         datalen = strlen (data);
 836
 837         buflen = datalen + sizeof (struct icmp);
 838
 839         icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
 840
 841         dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
 842
 843         status = ping_sendto (obj, ph, buf, buflen);
 844         if (status < 0)
 845         {
 846                 perror ("ping_sendto");
 847                 return (-1);
 848         }
 849
 850         dprintf ("sendto: status = %i\n", status);
 851
 852         return (0);
 853 }
 854
 855 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
 856 {
 857         struct icmp6_hdr *icmp6;
 858         int status;
 859
 860         char buf[4096];
 861         int  buflen;
 862
 863         char *data;
 864         int   datalen;
 865
 866         dprintf ("ph->hostname = %s\n", ph->hostname);
 867
 868         memset (buf, '\0', sizeof (buf));
 869         icmp6 = (struct icmp6_hdr *) buf;
 870         data  = (char *) (icmp6 + 1);
 871
 872         icmp6->icmp6_type  = ICMP6_ECHO_REQUEST;
 873         icmp6->icmp6_code  = 0;
 874         /* The checksum will be calculated by the TCP/IP stack.  */
 875         /* FIXME */
 876         icmp6->icmp6_cksum = 0;
 877         icmp6->icmp6_id    = htons (ph->ident);
 878         icmp6->icmp6_seq   = htons (ph->sequence);
 879
 880         buflen = 4096 - sizeof (struct icmp6_hdr);
 881         strncpy (data, ph->data, buflen);
 882         datalen = strlen (data);
 883
 884         buflen = datalen + sizeof (struct icmp6_hdr);
 885
 886         dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
 887
 888         status = ping_sendto (obj, ph, buf, buflen);
 889         if (status < 0)
 890         {
 891                 perror ("ping_sendto");
 892                 return (-1);
 893         }
 894
 895         dprintf ("sendto: status = %i\n", status);
 896
 897         return (0);
 898 }
 899
 900 static int ping_send_all (pingobj_t *obj)
 901 {
 902         pinghost_t *ph;
 903         pinghost_t *ptr;
 904
 905         int ret;
 906
 907         ret = 0;
 908         ph = obj->head;
 909
 910         for (ptr = ph; ptr != NULL; ptr = ptr->next)
 911         {
 912                 /* start timer.. The GNU `ping6' starts the timer before
 913                  * sending the packet, so I will do that too */
 914                 if (gettimeofday (ptr->timer, NULL) == -1)
 915                 {
 916 #if WITH_DEBUG
 917                         char errbuf[PING_ERRMSG_LEN];
 918                         dprintf ("gettimeofday: %s\n",
 919                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 920 #endif
 921                         timerclear (ptr->timer);
 922                         ret--;
 923                         continue;
 924                 }
 925                 else
 926                 {
 927                         dprintf ("timer set for hostname = %s\n", ptr->hostname);
 928                 }
 929
 930                 if (ptr->addrfamily == AF_INET6)
 931                 {
 932                         dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
 933                         if (ping_send_one_ipv6 (obj, ptr) != 0)
 934                         {
 935                                 timerclear (ptr->timer);
 936                                 ret--;
 937                                 continue;
 938                         }
 939                 }
 940                 else if (ptr->addrfamily == AF_INET)
 941                 {
 942                         dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
 943                         if (ping_send_one_ipv4 (obj, ptr) != 0)
 944                         {
 945                                 timerclear (ptr->timer);
 946                                 ret--;
 947                                 continue;
 948                         }
 949                 }
 950                 else /* this should not happen */
 951                 {
 952                         dprintf ("Unknown address family: %i\n", ptr->addrfamily);
 953                         timerclear (ptr->timer);
 954                         ret--;
 955                         continue;
 956                 }
 957
 958                 ptr->sequence++;
 959         }
 960
 961         return (ret);
 962 }
 963
 964 /*
 965  * Set the TTL of a socket protocol independently.
 966  */
 967 static int ping_set_ttl (pinghost_t *ph, int ttl)
 968 {
 969         int ret = -2;
 970
 971         if (ph->addrfamily == AF_INET)
 972         {
 973                 dprintf ("Setting TTLv4 to %i\n", ttl);
 974                 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
 975                                 &ttl, sizeof (ttl));
 976         }
 977         else if (ph->addrfamily == AF_INET6)
 978         {
 979                 dprintf ("Setting TTLv6 to %i\n", ttl);
 980                 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 981                                 &ttl, sizeof (ttl));
 982         }
 983
 984         return (ret);
 985 }
 986
 987 /*
 988  * Set the TOS of a socket protocol independently.
 989  *
 990  * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
 991  * set this. See socket(7) for details.
 992  */
 993 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
 994 {
 995         int ret = EINVAL;
 996         char errbuf[PING_ERRMSG_LEN];
 997
 998         if (ph->addrfamily == AF_INET)
 999         {
1000                 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
1001                 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
1002                                 &qos, sizeof (qos));
1003                 if (ret != 0)
1004                 {
1005                         ret = errno;
1006                         ping_set_error (obj, "ping_set_qos",
1007                                         sstrerror (ret, errbuf, sizeof (errbuf)));
1008                         dprintf ("Setting TP_TOS failed: %s\n", errbuf);
1009                 }
1010         }
1011         else if (ph->addrfamily == AF_INET6)
1012         {
1013                 /* IPV6_TCLASS requires an "int". */
1014                 int tmp = (int) qos;
1015
1016                 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
1017                 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
1018                                 &tmp, sizeof (tmp));
1019                 if (ret != 0)
1020                 {
1021                         ret = errno;
1022                         ping_set_error (obj, "ping_set_qos",
1023                                         sstrerror (ret, errbuf, sizeof (errbuf)));
1024                         dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1025                 }
1026         }
1027
1028         return (ret);
1029 }
1030
1031 static int ping_get_ident (void)
1032 {
1033         int fd;
1034         static int did_seed = 0;
1035
1036         int retval;
1037
1038         if (did_seed == 0)
1039         {
1040                 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1041                 {
1042                         unsigned int seed;
1043
1044                         if (read (fd, &seed, sizeof (seed)) != -1)
1045                         {
1046                                 did_seed = 1;
1047                                 dprintf ("Random seed:   %#x\n", seed);
1048                                 srandom (seed);
1049                         }
1050
1051                         close (fd);
1052                 }
1053 #if WITH_DEBUG
1054                 else
1055                 {
1056                         char errbuf[PING_ERRMSG_LEN];
1057                         dprintf ("open (/dev/urandom): %s\n",
1058                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1059                 }
1060 #endif
1061         }
1062
1063         retval = (int) random ();
1064
1065         dprintf ("Random number: %#x\n", retval);
1066
1067         return (retval);
1068 }
1069
1070 static pinghost_t *ping_alloc (void)
1071 {
1072         pinghost_t *ph;
1073         size_t      ph_size;
1074
1075         ph_size = sizeof (pinghost_t)
1076                 + sizeof (struct sockaddr_storage)
1077                 + sizeof (struct timeval);
1078
1079         ph = (pinghost_t *) malloc (ph_size);
1080         if (ph == NULL)
1081                 return (NULL);
1082
1083         memset (ph, '\0', ph_size);
1084
1085         ph->timer   = (struct timeval *) (ph + 1);
1086         ph->addr    = (struct sockaddr_storage *) (ph->timer + 1);
1087
1088         ph->addrlen = sizeof (struct sockaddr_storage);
1089         ph->fd      = -1;
1090         ph->latency = -1.0;
1091         ph->dropped = 0;
1092         ph->ident   = ping_get_ident () & 0xFFFF;
1093
1094         return (ph);
1095 }
1096
1097 static void ping_free (pinghost_t *ph)
1098 {
1099         if (ph->fd >= 0)
1100                 close (ph->fd);
1101
1102         if (ph->username != NULL)
1103                 free (ph->username);
1104
1105         if (ph->hostname != NULL)
1106                 free (ph->hostname);
1107
1108         if (ph->data != NULL)
1109                 free (ph->data);
1110
1111         free (ph);
1112 }
1113
1114 /*
1115  * public methods
1116  */
1117 const char *ping_get_error (pingobj_t *obj)
1118 {
1119         if (obj == NULL)
1120                 return (NULL);
1121         return (obj->errmsg);
1122 }
1123
1124 pingobj_t *ping_construct (void)
1125 {
1126         pingobj_t *obj;
1127
1128         if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1129                 return (NULL);
1130         memset (obj, 0, sizeof (pingobj_t));
1131
1132         obj->timeout    = PING_DEF_TIMEOUT;
1133         obj->ttl        = PING_DEF_TTL;
1134         obj->addrfamily = PING_DEF_AF;
1135         obj->data       = strdup (PING_DEF_DATA);
1136         obj->qos        = 0;
1137
1138         return (obj);
1139 }
1140
1141 void ping_destroy (pingobj_t *obj)
1142 {
1143         pinghost_t *current;
1144         pinghost_t *next;
1145
1146         if (obj == NULL)
1147                 return;
1148
1149         current = obj->head;
1150         next = NULL;
1151
1152         while (current != NULL)
1153         {
1154                 next = current->next;
1155                 ping_free (current);
1156                 current = next;
1157         }
1158
1159         if (obj->data != NULL)
1160                 free (obj->data);
1161
1162         if (obj->srcaddr != NULL)
1163                 free (obj->srcaddr);
1164
1165         if (obj->device != NULL)
1166                 free (obj->device);
1167
1168         free (obj);
1169
1170         return;
1171 }
1172
1173 int ping_setopt (pingobj_t *obj, int option, void *value)
1174 {
1175         int ret = 0;
1176
1177         if ((obj == NULL) || (value == NULL))
1178                 return (-1);
1179
1180         switch (option)
1181         {
1182                 case PING_OPT_QOS:
1183                 {
1184                         pinghost_t *ph;
1185
1186                         obj->qos = *((uint8_t *) value);
1187                         for (ph = obj->head; ph != NULL; ph = ph->next)
1188                                 ping_set_qos (obj, ph, obj->qos);
1189                         break;
1190                 }
1191
1192                 case PING_OPT_TIMEOUT:
1193                         obj->timeout = *((double *) value);
1194                         if (obj->timeout < 0.0)
1195                         {
1196                                 obj->timeout = PING_DEF_TIMEOUT;
1197                                 ret = -1;
1198                         }
1199                         break;
1200
1201                 case PING_OPT_TTL:
1202                         obj->ttl = *((int *) value);
1203                         if ((obj->ttl < 1) || (obj->ttl > 255))
1204                         {
1205                                 obj->ttl = PING_DEF_TTL;
1206                                 ret = -1;
1207                         }
1208                         else
1209                         {
1210                                 pinghost_t *ph;
1211
1212                                 for (ph = obj->head; ph != NULL; ph = ph->next)
1213                                         ping_set_ttl (ph, obj->ttl);
1214                         }
1215                         break;
1216
1217                 case PING_OPT_AF:
1218                         obj->addrfamily = *((int *) value);
1219                         if ((obj->addrfamily != AF_UNSPEC)
1220                                         && (obj->addrfamily != AF_INET)
1221                                         && (obj->addrfamily != AF_INET6))
1222                         {
1223                                 obj->addrfamily = PING_DEF_AF;
1224                                 ret = -1;
1225                         }
1226                         if (obj->srcaddr != NULL)
1227                         {
1228                                 free (obj->srcaddr);
1229                                 obj->srcaddr = NULL;
1230                         }
1231                         break;
1232
1233                 case PING_OPT_DATA:
1234                         if (obj->data != NULL)
1235                         {
1236                                 free (obj->data);
1237                                 obj->data = NULL;
1238                         }
1239                         obj->data = strdup ((const char *) value);
1240                         break;
1241
1242                 case PING_OPT_SOURCE:
1243                 {
1244                         char            *hostname = (char *) value;
1245                         struct addrinfo  ai_hints;
1246                         struct addrinfo *ai_list;
1247                         int              status;
1248 #if WITH_DEBUG
1249                         if (obj->addrfamily != AF_UNSPEC)
1250                         {
1251                                 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1252                         }
1253 #endif
1254                         memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1255                         ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1256 #if defined(AI_ADDRCONFIG)
1257                         ai_hints.ai_flags = AI_ADDRCONFIG;
1258 #endif
1259                         status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1260                         if (status != 0)
1261                         {
1262 #if defined(EAI_SYSTEM)
1263                                 char errbuf[PING_ERRMSG_LEN];
1264 #endif
1265                                 ping_set_error (obj, "getaddrinfo",
1266 #if defined(EAI_SYSTEM)
1267                                                 (status == EAI_SYSTEM)
1268                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1269 #endif
1270                                                 gai_strerror (status));
1271                                 ret = -1;
1272                                 break;
1273                         }
1274 #if WITH_DEBUG
1275                         if (ai_list->ai_next != NULL)
1276                         {
1277                                 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1278                         }
1279 #endif
1280                         if (obj->srcaddr == NULL)
1281                         {
1282                                 obj->srcaddrlen = 0;
1283                                 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1284                                 if (obj->srcaddr == NULL)
1285                                 {
1286                                         ping_set_errno (obj, errno);
1287                                         ret = -1;
1288                                         freeaddrinfo (ai_list);
1289                                         break;
1290                                 }
1291                         }
1292                         memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1293                         assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1294                         memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1295                                         ai_list->ai_addrlen);
1296                         obj->srcaddrlen = ai_list->ai_addrlen;
1297                         obj->addrfamily = ai_list->ai_family;
1298
1299                         freeaddrinfo (ai_list);
1300                 } /* case PING_OPT_SOURCE */
1301                 break;
1302
1303                 case PING_OPT_DEVICE:
1304                 {
1305 #ifdef SO_BINDTODEVICE
1306                         char *device = strdup ((char *) value);
1307
1308                         if (device == NULL)
1309                         {
1310                                 ping_set_errno (obj, errno);
1311                                 ret = -1;
1312                                 break;
1313                         }
1314
1315                         if (obj->device != NULL)
1316                                 free (obj->device);
1317                         obj->device = device;
1318 #else /* ! SO_BINDTODEVICE */
1319                         ping_set_errno (obj, ENOTSUP);
1320                         ret = -1;
1321 #endif /* ! SO_BINDTODEVICE */
1322                 } /* case PING_OPT_DEVICE */
1323                 break;
1324
1325                 default:
1326                         ret = -2;
1327         } /* switch (option) */
1328
1329         return (ret);
1330 } /* int ping_setopt */
1331
1332
1333 int ping_send (pingobj_t *obj)
1334 {
1335         if (obj == NULL)
1336                 return (-1);
1337
1338         if (ping_send_all (obj) < 0)
1339                 return (-1);
1340
1341         return (ping_receive_all (obj));
1342 }
1343
1344 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1345 {
1346         while (ph != NULL)
1347         {
1348                 if (strcasecmp (ph->username, host) == 0)
1349                         break;
1350
1351                 ph = ph->next;
1352         }
1353
1354         return (ph);
1355 }
1356
1357 int ping_host_add (pingobj_t *obj, const char *host)
1358 {
1359         pinghost_t *ph;
1360
1361         struct addrinfo  ai_hints;
1362         struct addrinfo *ai_list, *ai_ptr;
1363         int              ai_return;
1364
1365         if ((obj == NULL) || (host == NULL))
1366                 return (-1);
1367
1368         dprintf ("host = %s\n", host);
1369
1370         if (ping_host_search (obj->head, host) != NULL)
1371                 return (0);
1372
1373         memset (&ai_hints, '\0', sizeof (ai_hints));
1374         ai_hints.ai_flags     = 0;
1375 #ifdef AI_ADDRCONFIG
1376         ai_hints.ai_flags    |= AI_ADDRCONFIG;
1377 #endif
1378 #ifdef AI_CANONNAME
1379         ai_hints.ai_flags    |= AI_CANONNAME;
1380 #endif
1381         ai_hints.ai_family    = obj->addrfamily;
1382         ai_hints.ai_socktype  = SOCK_RAW;
1383
1384         if ((ph = ping_alloc ()) == NULL)
1385         {
1386                 dprintf ("Out of memory!\n");
1387                 return (-1);
1388         }
1389
1390         if ((ph->username = strdup (host)) == NULL)
1391         {
1392                 dprintf ("Out of memory!\n");
1393                 ping_set_errno (obj, errno);
1394                 ping_free (ph);
1395                 return (-1);
1396         }
1397
1398         if ((ph->hostname = strdup (host)) == NULL)
1399         {
1400                 dprintf ("Out of memory!\n");
1401                 ping_set_errno (obj, errno);
1402                 ping_free (ph);
1403                 return (-1);
1404         }
1405
1406         /* obj->data is not garuanteed to be != NULL */
1407         if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1408         {
1409                 dprintf ("Out of memory!\n");
1410                 ping_set_errno (obj, errno);
1411                 ping_free (ph);
1412                 return (-1);
1413         }
1414
1415         if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1416         {
1417 #if defined(EAI_SYSTEM)
1418                 char errbuf[PING_ERRMSG_LEN];
1419 #endif
1420                 dprintf ("getaddrinfo failed\n");
1421                 ping_set_error (obj, "getaddrinfo",
1422 #if defined(EAI_SYSTEM)
1423                                                 (ai_return == EAI_SYSTEM)
1424                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1425 #endif
1426                                 gai_strerror (ai_return));
1427                 ping_free (ph);
1428                 return (-1);
1429         }
1430
1431         if (ai_list == NULL)
1432                 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1433
1434         for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1435         {
1436                 ph->fd = -1;
1437
1438                 if (ai_ptr->ai_family == AF_INET)
1439                 {
1440                         ai_ptr->ai_socktype = SOCK_RAW;
1441                         ai_ptr->ai_protocol = IPPROTO_ICMP;
1442                 }
1443                 else if (ai_ptr->ai_family == AF_INET6)
1444                 {
1445                         ai_ptr->ai_socktype = SOCK_RAW;
1446                         ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1447                 }
1448                 else
1449                 {
1450                         char errmsg[PING_ERRMSG_LEN];
1451
1452                         snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1453                         errmsg[PING_ERRMSG_LEN - 1] = '\0';
1454
1455                         dprintf ("%s", errmsg);
1456                         ping_set_error (obj, "getaddrinfo", errmsg);
1457                         continue;
1458                 }
1459
1460                 /* TODO: Move this to a static function `ping_open_socket' and
1461                  * call it whenever the socket dies. */
1462                 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1463                 if (ph->fd == -1)
1464                 {
1465 #if WITH_DEBUG
1466                         char errbuf[PING_ERRMSG_LEN];
1467                         dprintf ("socket: %s\n",
1468                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1469 #endif
1470                         ping_set_errno (obj, errno);
1471                         continue;
1472                 }
1473
1474                 if (obj->srcaddr != NULL)
1475                 {
1476                         assert (obj->srcaddrlen > 0);
1477                         assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1478
1479                         if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1480                         {
1481 #if WITH_DEBUG
1482                                 char errbuf[PING_ERRMSG_LEN];
1483                                 dprintf ("bind: %s\n",
1484                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1485 #endif
1486                                 ping_set_errno (obj, errno);
1487                                 close (ph->fd);
1488                                 ph->fd = -1;
1489                                 continue;
1490                         }
1491                 }
1492
1493 #ifdef SO_BINDTODEVICE
1494                 if (obj->device != NULL)
1495                 {
1496                         if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1497                                         obj->device, strlen (obj->device) + 1) != 0)
1498                         {
1499 #if WITH_DEBUG
1500                                 char errbuf[PING_ERRMSG_LEN];
1501                                 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1502                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1503 #endif
1504                                 ping_set_errno (obj, errno);
1505                                 close (ph->fd);
1506                                 ph->fd = -1;
1507                                 continue;
1508                         }
1509                 }
1510 #endif /* SO_BINDTODEVICE */
1511 #ifdef SO_TIMESTAMP
1512                 if (1) /* {{{ */
1513                 {
1514                         int status;
1515                         int opt = 1;
1516
1517                         status = setsockopt (ph->fd,
1518                                         SOL_SOCKET, SO_TIMESTAMP,
1519                                         &opt, sizeof (opt));
1520                         if (status != 0)
1521                         {
1522 #if WITH_DEBUG
1523                                 char errbuf[PING_ERRMSG_LEN];
1524                                 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1525                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1526 #endif
1527                                 ping_set_errno (obj, errno);
1528                                 close (ph->fd);
1529                                 ph->fd = -1;
1530                                 continue;
1531                         }
1532                 } /* }}} if (1) */
1533 #endif /* SO_TIMESTAMP */
1534                 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1535                 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1536                 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1537                 ph->addrlen = ai_ptr->ai_addrlen;
1538                 ph->addrfamily = ai_ptr->ai_family;
1539
1540 #ifdef AI_CANONNAME
1541                 if ((ai_ptr->ai_canonname != NULL)
1542                                 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1543                 {
1544                         char *old_hostname;
1545
1546                         dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1547                                         ph->hostname, ai_ptr->ai_canonname);
1548
1549                         old_hostname = ph->hostname;
1550                         if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1551                         {
1552                                 /* strdup failed, falling back to old hostname */
1553                                 ph->hostname = old_hostname;
1554                         }
1555                         else if (old_hostname != NULL)
1556                         {
1557                                 free (old_hostname);
1558                         }
1559                 }
1560 #endif /* AI_CANONNAME */
1561
1562                 if (ph->addrfamily == AF_INET)
1563                 {
1564                         int opt;
1565
1566 #ifdef IP_RECVTOS
1567                         /* Enable receiving the TOS field */
1568                         opt = 1;
1569                         setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1570                                         &opt, sizeof (opt));
1571 #endif  /* IP_RECVTOS */
1572
1573                         /* Enable receiving the TTL field */
1574                         opt = 1;
1575                         setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1576                                         &opt, sizeof (opt));
1577                 }
1578 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1579                 else if (ph->addrfamily == AF_INET6)
1580                 {
1581                         int opt;
1582
1583 # if defined(IPV6_RECVHOPLIMIT)
1584                         /* For details see RFC 3542, section 6.3. */
1585                         opt = 1;
1586                         setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1587                                         &opt, sizeof (opt));
1588 # endif /* IPV6_RECVHOPLIMIT */
1589
1590 # if defined(IPV6_RECVTCLASS)
1591                         /* For details see RFC 3542, section 6.5. */
1592                         opt = 1;
1593                         setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1594                                         &opt, sizeof (opt));
1595 # endif /* IPV6_RECVTCLASS */
1596                 }
1597 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1598
1599                 break;
1600         } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1601
1602         freeaddrinfo (ai_list);
1603
1604         if (ph->fd < 0)
1605         {
1606                 ping_free (ph);
1607                 return (-1);
1608         }
1609
1610         /*
1611          * Adding in the front is much easier, but then the iterator will
1612          * return the host that was added last as first host. That's just not
1613          * nice. -octo
1614          */
1615         if (obj->head == NULL)
1616         {
1617                 obj->head = ph;
1618         }
1619         else
1620         {
1621                 pinghost_t *hptr;
1622
1623                 hptr = obj->head;
1624                 while (hptr->next != NULL)
1625                         hptr = hptr->next;
1626
1627                 assert ((hptr != NULL) && (hptr->next == NULL));
1628                 hptr->next = ph;
1629         }
1630
1631         ping_set_ttl (ph, obj->ttl);
1632         ping_set_qos (obj, ph, obj->qos);
1633
1634         return (0);
1635 } /* int ping_host_add */
1636
1637 int ping_host_remove (pingobj_t *obj, const char *host)
1638 {
1639         pinghost_t *pre, *cur;
1640
1641         if ((obj == NULL) || (host == NULL))
1642                 return (-1);
1643
1644         pre = NULL;
1645         cur = obj->head;
1646
1647         while (cur != NULL)
1648         {
1649                 if (strcasecmp (host, cur->username) == 0)
1650                         break;
1651
1652                 pre = cur;
1653                 cur = cur->next;
1654         }
1655
1656         if (cur == NULL)
1657         {
1658                 ping_set_error (obj, "ping_host_remove", "Host not found");
1659                 return (-1);
1660         }
1661
1662         if (pre == NULL)
1663                 obj->head = cur->next;
1664         else
1665                 pre->next = cur->next;
1666
1667         ping_free (cur);
1668
1669         return (0);
1670 }
1671
1672 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1673 {
1674         if (obj == NULL)
1675                 return (NULL);
1676         return ((pingobj_iter_t *) obj->head);
1677 }
1678
1679 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1680 {
1681         if (iter == NULL)
1682                 return (NULL);
1683         return ((pingobj_iter_t *) iter->next);
1684 }
1685
1686 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1687                 void *buffer, size_t *buffer_len)
1688 {
1689         int ret = EINVAL;
1690
1691         size_t orig_buffer_len = *buffer_len;
1692
1693         if ((iter == NULL) || (buffer_len == NULL))
1694                 return (-1);
1695
1696         if ((buffer == NULL) && (*buffer_len != 0 ))
1697                 return (-1);
1698
1699         switch (info)
1700         {
1701                 case PING_INFO_USERNAME:
1702                         ret = ENOMEM;
1703                         *buffer_len = strlen (iter->username) + 1;
1704                         if (orig_buffer_len <= *buffer_len)
1705                                 break;
1706                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1707                          * will copy `*buffer_len' and pad the rest of
1708                          * `buffer' with null-bytes */
1709                         strncpy (buffer, iter->username, orig_buffer_len);
1710                         ret = 0;
1711                         break;
1712
1713                 case PING_INFO_HOSTNAME:
1714                         ret = ENOMEM;
1715                         *buffer_len = strlen (iter->hostname) + 1;
1716                         if (orig_buffer_len < *buffer_len)
1717                                 break;
1718                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1719                          * will copy `*buffer_len' and pad the rest of
1720                          * `buffer' with null-bytes */
1721                         strncpy (buffer, iter->hostname, orig_buffer_len);
1722                         ret = 0;
1723                         break;
1724
1725                 case PING_INFO_ADDRESS:
1726                         ret = getnameinfo ((struct sockaddr *) iter->addr,
1727                                         iter->addrlen,
1728                                         (char *) buffer,
1729                                         *buffer_len,
1730                                         NULL, 0,
1731                                         NI_NUMERICHOST);
1732                         if (ret != 0)
1733                         {
1734                                 if ((ret == EAI_MEMORY)
1735 #ifdef EAI_OVERFLOW
1736                                                 || (ret == EAI_OVERFLOW)
1737 #endif
1738                                    )
1739                                         ret = ENOMEM;
1740 #if defined(EAI_SYSTEM)
1741                                 else if (ret == EAI_SYSTEM)
1742                                         ret = errno;
1743 #endif
1744                                 else
1745                                         ret = EINVAL;
1746                         }
1747                         break;
1748
1749                 case PING_INFO_FAMILY:
1750                         ret = ENOMEM;
1751                         *buffer_len = sizeof (int);
1752                         if (orig_buffer_len < sizeof (int))
1753                                 break;
1754                         *((int *) buffer) = iter->addrfamily;
1755                         ret = 0;
1756                         break;
1757
1758                 case PING_INFO_LATENCY:
1759                         ret = ENOMEM;
1760                         *buffer_len = sizeof (double);
1761                         if (orig_buffer_len < sizeof (double))
1762                                 break;
1763                         *((double *) buffer) = iter->latency;
1764                         ret = 0;
1765                         break;
1766
1767                 case PING_INFO_DROPPED:
1768                         ret = ENOMEM;
1769                         *buffer_len = sizeof (uint32_t);
1770                         if (orig_buffer_len < sizeof (uint32_t))
1771                                 break;
1772                         *((uint32_t *) buffer) = iter->dropped;
1773                         ret = 0;
1774                         break;
1775
1776                 case PING_INFO_SEQUENCE:
1777                         ret = ENOMEM;
1778                         *buffer_len = sizeof (unsigned int);
1779                         if (orig_buffer_len < sizeof (unsigned int))
1780                                 break;
1781                         *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1782                         ret = 0;
1783                         break;
1784
1785                 case PING_INFO_IDENT:
1786                         ret = ENOMEM;
1787                         *buffer_len = sizeof (uint16_t);
1788                         if (orig_buffer_len < sizeof (uint16_t))
1789                                 break;
1790                         *((uint16_t *) buffer) = (uint16_t) iter->ident;
1791                         ret = 0;
1792                         break;
1793
1794                 case PING_INFO_DATA:
1795                         ret = ENOMEM;
1796                         *buffer_len = strlen (iter->data);
1797                         if (orig_buffer_len < *buffer_len)
1798                                 break;
1799                         strncpy ((char *) buffer, iter->data, orig_buffer_len);
1800                         ret = 0;
1801                         break;
1802
1803                 case PING_INFO_RECV_TTL:
1804                         ret = ENOMEM;
1805                         *buffer_len = sizeof (int);
1806                         if (orig_buffer_len < sizeof (int))
1807                                 break;
1808                         *((int *) buffer) = iter->recv_ttl;
1809                         ret = 0;
1810                         break;
1811
1812                 case PING_INFO_RECV_QOS:
1813                         ret = ENOMEM;
1814                         if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1815                         if (!*buffer_len) *buffer_len=1;
1816                         if (orig_buffer_len < *buffer_len)
1817                                 break;
1818                         memcpy(buffer,&iter->recv_qos,*buffer_len);
1819                         ret = 0;
1820                         break;
1821         }
1822
1823         return (ret);
1824 } /* ping_iterator_get_info */
1825
1826 void *ping_iterator_get_context (pingobj_iter_t *iter)
1827 {
1828         if (iter == NULL)
1829                 return (NULL);
1830         return (iter->context);
1831 }
1832
1833 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1834 {
1835         if (iter == NULL)
1836                 return;
1837         iter->context = context;
1838 }