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 < sizeof (struct icmphdr))
 302                 return (NULL);
 303
 304         icmp_hdr = (struct icmp *) buffer;
 305         buffer     += sizeof (struct icmphdr);
 306         buffer_len -= sizeof (struct icmphdr);
 307
 308         if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
 309         {
 310                 dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
 311                 return (NULL);
 312         }
 313
 314         recv_checksum = icmp_hdr->icmp_cksum;
 315         icmp_hdr->icmp_cksum = 0;
 316         calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
 317                         sizeof (struct icmphdr) + buffer_len);
 318
 319         if (recv_checksum != calc_checksum)
 320         {
 321                 dprintf ("Checksum missmatch: Got 0x%04"PRIx16", "
 322                                 "calculated 0x%04"PRIx16"\n",
 323                                 recv_checksum, calc_checksum);
 324                 return (NULL);
 325         }
 326
 327         ident = ntohs (icmp_hdr->icmp_id);
 328         seq   = ntohs (icmp_hdr->icmp_seq);
 329
 330         /* We have to iterate over all hosts, since ICMPv4 packets may
 331          * be received on any raw v4 socket. */
 332         for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
 333         {
 334                 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
 335                                 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
 336
 337                 if (ptr->addrfamily != AF_INET)
 338                         continue;
 339
 340                 if (!timerisset (ptr->timer))
 341                         continue;
 342
 343                 if (ptr->ident != ident)
 344                         continue;
 345
 346                 if (((ptr->sequence - 1) & 0xFFFF) != seq)
 347                         continue;
 348
 349                 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
 350                                 "seq = %"PRIu16"\n",
 351                                 ptr->hostname, ident, seq);
 352
 353                 break;
 354         }
 355
 356         if (ptr == NULL)
 357         {
 358                 dprintf ("No match found for ident = 0x%04"PRIx16", seq = %"PRIu16"\n",
 359                                 ident, seq);
 360         }
 361
 362         if (ptr != NULL){
 363                 ptr->recv_ttl = (int)     ip_hdr->ip_ttl;
 364                 ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
 365         }
 366         return (ptr);
 367 }
 368
 369 #ifndef ICMP6_ECHO_REQUEST
 370 # ifdef ICMP6_ECHO /* AIX netinet/ip6_icmp.h */
 371 #  define ICMP6_ECHO_REQUEST ICMP6_ECHO
 372 # else
 373 #  define ICMP6_ECHO_REQUEST 128
 374 # endif
 375 #endif
 376
 377 #ifndef ICMP6_ECHO_REPLY
 378 # ifdef ICMP6_ECHOREPLY /* AIX netinet/ip6_icmp.h */
 379 #  define ICMP6_ECHO_REPLY ICMP6_ECHOREPLY
 380 # else
 381 #  define ICMP6_ECHO_REPLY 129
 382 # endif
 383 #endif
 384
 385 static pinghost_t *ping_receive_ipv6 (pingobj_t *obj, char *buffer,
 386                 size_t buffer_len)
 387 {
 388         struct icmp6_hdr *icmp_hdr;
 389
 390         uint16_t ident;
 391         uint16_t seq;
 392
 393         pinghost_t *ptr;
 394
 395         if (buffer_len < sizeof (struct icmp6_hdr))
 396                 return (NULL);
 397
 398         icmp_hdr = (struct icmp6_hdr *) buffer;
 399         buffer     += sizeof (struct icmp);
 400         buffer_len -= sizeof (struct icmp);
 401
 402         if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
 403         {
 404                 dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
 405                 return (NULL);
 406         }
 407
 408         if (icmp_hdr->icmp6_code != 0)
 409         {
 410                 dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
 411                 return (NULL);
 412         }
 413
 414         ident = ntohs (icmp_hdr->icmp6_id);
 415         seq   = ntohs (icmp_hdr->icmp6_seq);
 416
 417         /* We have to iterate over all hosts, since ICMPv6 packets may
 418          * be received on any raw v6 socket. */
 419         for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
 420         {
 421                 dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
 422                                 ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
 423
 424                 if (ptr->addrfamily != AF_INET6)
 425                         continue;
 426
 427                 if (!timerisset (ptr->timer))
 428                         continue;
 429
 430                 if (ptr->ident != ident)
 431                         continue;
 432
 433                 if (((ptr->sequence - 1) & 0xFFFF) != seq)
 434                         continue;
 435
 436                 dprintf ("Match found: hostname = %s, ident = 0x%04"PRIx16", "
 437                                 "seq = %"PRIu16"\n",
 438                                 ptr->hostname, ident, seq);
 439
 440                 break;
 441         }
 442
 443         if (ptr == NULL)
 444         {
 445                 dprintf ("No match found for ident = 0x%04"PRIx16", "
 446                                 "seq = %"PRIu16"\n",
 447                                 ident, seq);
 448         }
 449
 450         return (ptr);
 451 }
 452
 453 static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
 454                 struct timeval *now)
 455 {
 456         /* Note: 'ph' is not necessarily the host object for which we receive a
 457          * reply. The right object will be returned by ping_receive_ipv*(). For
 458          * now, we can only rely on ph->fd and ph->addrfamily. */
 459
 460         struct timeval diff, pkt_now = *now;
 461         pinghost_t *host = NULL;
 462         int recv_ttl;
 463         uint8_t recv_qos;
 464
 465         /*
 466          * Set up the receive buffer..
 467          */
 468         struct msghdr msghdr;
 469         struct cmsghdr *cmsg;
 470         char payload_buffer[4096];
 471         ssize_t payload_buffer_len;
 472         char control_buffer[4096];
 473         struct iovec payload_iovec;
 474
 475         memset (&payload_iovec, 0, sizeof (payload_iovec));
 476         payload_iovec.iov_base = payload_buffer;
 477         payload_iovec.iov_len = sizeof (payload_buffer);
 478
 479         memset (&msghdr, 0, sizeof (msghdr));
 480         /* unspecified source address */
 481         msghdr.msg_name = NULL;
 482         msghdr.msg_namelen = 0;
 483         /* output buffer vector, see readv(2) */
 484         msghdr.msg_iov = &payload_iovec;
 485         msghdr.msg_iovlen = 1;
 486         /* output buffer for control messages */
 487         msghdr.msg_control = control_buffer;
 488         msghdr.msg_controllen = sizeof (control_buffer);
 489         /* flags; this is an output only field.. */
 490         msghdr.msg_flags = 0;
 491 #ifdef MSG_XPG4_2
 492         msghdr.msg_flags |= MSG_XPG4_2;
 493 #endif
 494
 495         payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
 496         if (payload_buffer_len < 0)
 497         {
 498 #if WITH_DEBUG
 499                 char errbuf[PING_ERRMSG_LEN];
 500                 dprintf ("recvfrom: %s\n",
 501                                 sstrerror (errno, errbuf, sizeof (errbuf)));
 502 #endif
 503                 return (-1);
 504         }
 505         dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
 506
 507         /* Iterate over all auxiliary data in msghdr */
 508         recv_ttl = -1;
 509         recv_qos = 0;
 510         for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
 511                         cmsg != NULL;
 512                         cmsg = CMSG_NXTHDR (&msghdr, cmsg))
 513         {
 514                 if (cmsg->cmsg_level == SOL_SOCKET)
 515                 {
 516 #ifdef SO_TIMESTAMP
 517                         if (cmsg->cmsg_type == SO_TIMESTAMP)
 518                                 memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
 519 #endif /* SO_TIMESTAMP */
 520                 }
 521                 else if (ph->addrfamily == AF_INET) /* {{{ */
 522                 {
 523                         if (cmsg->cmsg_level != IPPROTO_IP)
 524                                 continue;
 525
 526                         if (cmsg->cmsg_type == IP_TOS)
 527                         {
 528                                 memcpy (&recv_qos, CMSG_DATA (cmsg),
 529                                                 sizeof (recv_qos));
 530                                 dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
 531                         } else
 532                         if (cmsg->cmsg_type == IP_TTL)
 533                         {
 534                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 535                                                 sizeof (recv_ttl));
 536                                 dprintf ("TTLv4 = %i;\n", recv_ttl);
 537                         }
 538                         else
 539                         {
 540                                 dprintf ("Not handling option %i.\n",
 541                                                 cmsg->cmsg_type);
 542                         }
 543                 } /* }}} */
 544                 else if (ph->addrfamily == AF_INET6) /* {{{ */
 545                 {
 546                         if (cmsg->cmsg_level != IPPROTO_IPV6)
 547                                 continue;
 548
 549                         if (cmsg->cmsg_type == IPV6_TCLASS)
 550                         {
 551                                 memcpy (&recv_qos, CMSG_DATA (cmsg),
 552                                                 sizeof (recv_qos));
 553                                 dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
 554                         } else
 555 #ifdef IPV6_HOPLIMIT
 556                         if (cmsg->cmsg_type == IPV6_HOPLIMIT)
 557                         {
 558                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 559                                                 sizeof (recv_ttl));
 560                                 dprintf ("TTLv6 = %i;\n", recv_ttl);
 561                         }
 562                         else
 563 #endif
 564 #ifdef IPV6_UNICAST_HOPS
 565                         if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
 566                         {
 567                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 568                                                 sizeof (recv_ttl));
 569                                 dprintf ("TTLv6 = %i;\n", recv_ttl);
 570                         }
 571                         else
 572 #endif
 573 #ifdef IPV6_MULTICAST_HOPS
 574                         if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
 575                         {
 576                                 memcpy (&recv_ttl, CMSG_DATA (cmsg),
 577                                                 sizeof (recv_ttl));
 578                                 dprintf ("TTLv6 = %i;\n", recv_ttl);
 579                         }
 580                         else
 581 #endif
 582                         {
 583                                 dprintf ("Not handling option %i.\n",
 584                                                 cmsg->cmsg_type);
 585                         }
 586                 } /* }}} */
 587                 else
 588                 {
 589                         dprintf ("Don't know how to handle "
 590                                         "unknown protocol %i.\n",
 591                                         cmsg->cmsg_level);
 592                 }
 593         } /* }}} for (cmsg) */
 594
 595         if (ph->addrfamily == AF_INET)
 596         {
 597                 host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
 598                 if (host == NULL)
 599                         return (-1);
 600         }
 601         else if (ph->addrfamily == AF_INET6)
 602         {
 603                 host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
 604                 if (host == NULL)
 605                         return (-1);
 606         }
 607         else
 608         {
 609                 dprintf ("ping_receive_one: Unknown address family %i.\n",
 610                                 ph->addrfamily);
 611                 return (-1);
 612         }
 613
 614         dprintf ("rcvd: %12i.%06i\n",
 615                         (int) pkt_now.tv_sec,
 616                         (int) pkt_now.tv_usec);
 617         dprintf ("sent: %12i.%06i\n",
 618                         (int) host->timer->tv_sec,
 619                         (int) host->timer->tv_usec);
 620
 621         if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
 622         {
 623                 timerclear (host->timer);
 624                 return (-1);
 625         }
 626
 627         dprintf ("diff: %12i.%06i\n",
 628                         (int) diff.tv_sec,
 629                         (int) diff.tv_usec);
 630
 631         if (recv_ttl >= 0)
 632                 host->recv_ttl = recv_ttl;
 633         host->recv_qos = recv_qos;
 634
 635         host->latency  = ((double) diff.tv_usec) / 1000.0;
 636         host->latency += ((double) diff.tv_sec)  * 1000.0;
 637
 638         timerclear (host->timer);
 639
 640         return (0);
 641 }
 642
 643 /* Blocks until a packet was received from all hosts or the timeout is reached.
 644  * When interrupted, (-EINTR) is returned. On error, -1 is returned. On
 645  * success, returns zero. */
 646 static int ping_receive_all (pingobj_t *obj)
 647 {
 648         fd_set read_fds;
 649         fd_set err_fds;
 650         int num_fds;
 651         int max_fd;
 652
 653         pinghost_t *ph;
 654         pinghost_t *ptr;
 655
 656         struct timeval endtime;
 657         struct timeval nowtime;
 658         struct timeval timeout;
 659         int status;
 660
 661         int ret;
 662
 663         ph = obj->head;
 664         ret = 0;
 665
 666         for (ptr = ph; ptr != NULL; ptr = ptr->next)
 667         {
 668                 ptr->latency  = -1.0;
 669                 ptr->recv_ttl = -1;
 670         }
 671
 672         if (gettimeofday (&nowtime, NULL) == -1)
 673         {
 674                 ping_set_errno (obj, errno);
 675                 return (-1);
 676         }
 677
 678         /* Set up timeout */
 679         timeout.tv_sec = (time_t) obj->timeout;
 680         timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
 681
 682         dprintf ("Set timeout to %i.%06i seconds\n",
 683                         (int) timeout.tv_sec,
 684                         (int) timeout.tv_usec);
 685
 686         ping_timeval_add (&nowtime, &timeout, &endtime);
 687
 688         while (1)
 689         {
 690                 FD_ZERO (&read_fds);
 691                 FD_ZERO (&err_fds);
 692                 num_fds =  0;
 693                 max_fd = -1;
 694
 695                 for (ptr = ph; ptr != NULL; ptr = ptr->next)
 696                 {
 697                         if (!timerisset (ptr->timer))
 698                                 continue;
 699
 700                         FD_SET (ptr->fd, &read_fds);
 701                         FD_SET (ptr->fd, &err_fds);
 702                         num_fds++;
 703
 704                         if (max_fd < ptr->fd)
 705                                 max_fd = ptr->fd;
 706                 }
 707
 708                 if (num_fds == 0)
 709                         break;
 710
 711                 if (gettimeofday (&nowtime, NULL) == -1)
 712                 {
 713                         ping_set_errno (obj, errno);
 714                         return (-1);
 715                 }
 716
 717                 if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
 718                         break;
 719
 720                 dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
 721                                 (int) timeout.tv_sec,
 722                                 (int) timeout.tv_usec);
 723
 724                 status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
 725
 726                 if (gettimeofday (&nowtime, NULL) == -1)
 727                 {
 728                         ping_set_errno (obj, errno);
 729                         return (-1);
 730                 }
 731
 732                 if ((status == -1) && (errno == EINTR))
 733                 {
 734                         dprintf ("select was interrupted by signal..\n");
 735                         ping_set_errno (obj, EINTR);
 736                         return (-EINTR);
 737                 }
 738                 else if (status < 0)
 739                 {
 740 #if WITH_DEBUG
 741                         char errbuf[PING_ERRMSG_LEN];
 742                         dprintf ("select: %s\n",
 743                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 744 #endif
 745                         break;
 746                 }
 747                 else if (status == 0)
 748                 {
 749                         dprintf ("select timed out\n");
 750                         for (ptr = ph; ptr != NULL; ptr = ptr->next)
 751                                 if (ptr->latency < 0.0)
 752                                         ptr->dropped++;
 753                         break;
 754                 }
 755
 756                 for (ptr = ph; ptr != NULL; ptr = ptr->next)
 757                 {
 758                         if (FD_ISSET (ptr->fd, &read_fds))
 759                         {
 760                                 if (ping_receive_one (obj, ptr, &nowtime) == 0)
 761                                         ret++;
 762                         }
 763                         else if (FD_ISSET (ptr->fd, &err_fds))
 764                         {
 765                                 /* clear the timer in this case so that we
 766                                  * don't run into an endless loop. */
 767                                 /* TODO: Set an error flag in this case. */
 768                                 timerclear (ptr->timer);
 769                         }
 770                 }
 771         } /* while (1) */
 772
 773         return (ret);
 774 } /* int ping_receive_all */
 775
 776 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 777  * Sending functions:                                                        *
 778  *                                                                           *
 779  * ping_send_all                                                             *
 780  * +-> ping_send_one_ipv4                                                    *
 781  * `-> ping_send_one_ipv6                                                    *
 782  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 783 static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
 784                 const void *buf, size_t buflen)
 785 {
 786         ssize_t ret;
 787
 788         if (gettimeofday (ph->timer, NULL) == -1)
 789         {
 790                 timerclear (ph->timer);
 791                 return (-1);
 792         }
 793
 794         ret = sendto (ph->fd, buf, buflen, 0,
 795                         (struct sockaddr *) ph->addr, ph->addrlen);
 796
 797         if (ret < 0)
 798         {
 799 #if defined(EHOSTUNREACH)
 800                 if (errno == EHOSTUNREACH)
 801                         return (0);
 802 #endif
 803 #if defined(ENETUNREACH)
 804                 if (errno == ENETUNREACH)
 805                         return (0);
 806 #endif
 807                 ping_set_errno (obj, errno);
 808         }
 809
 810         return (ret);
 811 }
 812
 813 static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
 814 {
 815         struct icmp *icmp4;
 816         int status;
 817
 818         char buf[4096];
 819         int  buflen;
 820
 821         char *data;
 822         int   datalen;
 823
 824         dprintf ("ph->hostname = %s\n", ph->hostname);
 825
 826         memset (buf, '\0', sizeof (buf));
 827         icmp4 = (struct icmp *) buf;
 828         data  = buf + sizeof (struct icmphdr);
 829
 830         icmp4->icmp_type  = ICMP_ECHO;
 831         icmp4->icmp_code  = 0;
 832         icmp4->icmp_cksum = 0;
 833         icmp4->icmp_id    = htons (ph->ident);
 834         icmp4->icmp_seq   = htons (ph->sequence);
 835
 836         buflen = sizeof(buf) - sizeof (struct icmphdr);
 837         strncpy (data, ph->data, buflen);
 838         datalen = strlen (data);
 839
 840         buflen = datalen + sizeof (struct icmphdr);
 841
 842         icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
 843
 844         dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
 845
 846         status = ping_sendto (obj, ph, buf, buflen);
 847         if (status < 0)
 848         {
 849                 perror ("ping_sendto");
 850                 return (-1);
 851         }
 852
 853         dprintf ("sendto: status = %i\n", status);
 854
 855         return (0);
 856 }
 857
 858 static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
 859 {
 860         struct icmp6_hdr *icmp6;
 861         int status;
 862
 863         char buf[4096];
 864         int  buflen;
 865
 866         char *data;
 867         int   datalen;
 868
 869         dprintf ("ph->hostname = %s\n", ph->hostname);
 870
 871         memset (buf, '\0', sizeof (buf));
 872         icmp6 = (struct icmp6_hdr *) buf;
 873         data  = (char *) (icmp6 + 1);
 874
 875         icmp6->icmp6_type  = ICMP6_ECHO_REQUEST;
 876         icmp6->icmp6_code  = 0;
 877         /* The checksum will be calculated by the TCP/IP stack.  */
 878         /* FIXME */
 879         icmp6->icmp6_cksum = 0;
 880         icmp6->icmp6_id    = htons (ph->ident);
 881         icmp6->icmp6_seq   = htons (ph->sequence);
 882
 883         buflen = 4096 - sizeof (struct icmp6_hdr);
 884         strncpy (data, ph->data, buflen);
 885         datalen = strlen (data);
 886
 887         buflen = datalen + sizeof (struct icmp6_hdr);
 888
 889         dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
 890
 891         status = ping_sendto (obj, ph, buf, buflen);
 892         if (status < 0)
 893         {
 894                 perror ("ping_sendto");
 895                 return (-1);
 896         }
 897
 898         dprintf ("sendto: status = %i\n", status);
 899
 900         return (0);
 901 }
 902
 903 static int ping_send_all (pingobj_t *obj)
 904 {
 905         pinghost_t *ph;
 906         pinghost_t *ptr;
 907
 908         int ret;
 909
 910         ret = 0;
 911         ph = obj->head;
 912
 913         for (ptr = ph; ptr != NULL; ptr = ptr->next)
 914         {
 915                 /* start timer.. The GNU `ping6' starts the timer before
 916                  * sending the packet, so I will do that too */
 917                 if (gettimeofday (ptr->timer, NULL) == -1)
 918                 {
 919 #if WITH_DEBUG
 920                         char errbuf[PING_ERRMSG_LEN];
 921                         dprintf ("gettimeofday: %s\n",
 922                                         sstrerror (errno, errbuf, sizeof (errbuf)));
 923 #endif
 924                         timerclear (ptr->timer);
 925                         ret--;
 926                         continue;
 927                 }
 928                 else
 929                 {
 930                         dprintf ("timer set for hostname = %s\n", ptr->hostname);
 931                 }
 932
 933                 if (ptr->addrfamily == AF_INET6)
 934                 {
 935                         dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
 936                         if (ping_send_one_ipv6 (obj, ptr) != 0)
 937                         {
 938                                 timerclear (ptr->timer);
 939                                 ret--;
 940                                 continue;
 941                         }
 942                 }
 943                 else if (ptr->addrfamily == AF_INET)
 944                 {
 945                         dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
 946                         if (ping_send_one_ipv4 (obj, ptr) != 0)
 947                         {
 948                                 timerclear (ptr->timer);
 949                                 ret--;
 950                                 continue;
 951                         }
 952                 }
 953                 else /* this should not happen */
 954                 {
 955                         dprintf ("Unknown address family: %i\n", ptr->addrfamily);
 956                         timerclear (ptr->timer);
 957                         ret--;
 958                         continue;
 959                 }
 960
 961                 ptr->sequence++;
 962         }
 963
 964         return (ret);
 965 }
 966
 967 /*
 968  * Set the TTL of a socket protocol independently.
 969  */
 970 static int ping_set_ttl (pinghost_t *ph, int ttl)
 971 {
 972         int ret = -2;
 973
 974         if (ph->addrfamily == AF_INET)
 975         {
 976                 dprintf ("Setting TTLv4 to %i\n", ttl);
 977                 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
 978                                 &ttl, sizeof (ttl));
 979         }
 980         else if (ph->addrfamily == AF_INET6)
 981         {
 982                 dprintf ("Setting TTLv6 to %i\n", ttl);
 983                 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
 984                                 &ttl, sizeof (ttl));
 985         }
 986
 987         return (ret);
 988 }
 989
 990 /*
 991  * Set the TOS of a socket protocol independently.
 992  *
 993  * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
 994  * set this. See socket(7) for details.
 995  */
 996 static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
 997 {
 998         int ret = EINVAL;
 999         char errbuf[PING_ERRMSG_LEN];
1000
1001         if (ph->addrfamily == AF_INET)
1002         {
1003                 dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
1004                 ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
1005                                 &qos, sizeof (qos));
1006                 if (ret != 0)
1007                 {
1008                         ret = errno;
1009                         ping_set_error (obj, "ping_set_qos",
1010                                         sstrerror (ret, errbuf, sizeof (errbuf)));
1011                         dprintf ("Setting TP_TOS failed: %s\n", errbuf);
1012                 }
1013         }
1014         else if (ph->addrfamily == AF_INET6)
1015         {
1016                 /* IPV6_TCLASS requires an "int". */
1017                 int tmp = (int) qos;
1018
1019                 dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
1020                 ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
1021                                 &tmp, sizeof (tmp));
1022                 if (ret != 0)
1023                 {
1024                         ret = errno;
1025                         ping_set_error (obj, "ping_set_qos",
1026                                         sstrerror (ret, errbuf, sizeof (errbuf)));
1027                         dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
1028                 }
1029         }
1030
1031         return (ret);
1032 }
1033
1034 static int ping_get_ident (void)
1035 {
1036         int fd;
1037         static int did_seed = 0;
1038
1039         int retval;
1040
1041         if (did_seed == 0)
1042         {
1043                 if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
1044                 {
1045                         unsigned int seed;
1046
1047                         if (read (fd, &seed, sizeof (seed)) != -1)
1048                         {
1049                                 did_seed = 1;
1050                                 dprintf ("Random seed:   %#x\n", seed);
1051                                 srandom (seed);
1052                         }
1053
1054                         close (fd);
1055                 }
1056 #if WITH_DEBUG
1057                 else
1058                 {
1059                         char errbuf[PING_ERRMSG_LEN];
1060                         dprintf ("open (/dev/urandom): %s\n",
1061                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1062                 }
1063 #endif
1064         }
1065
1066         retval = (int) random ();
1067
1068         dprintf ("Random number: %#x\n", retval);
1069
1070         return (retval);
1071 }
1072
1073 static pinghost_t *ping_alloc (void)
1074 {
1075         pinghost_t *ph;
1076         size_t      ph_size;
1077
1078         ph_size = sizeof (pinghost_t)
1079                 + sizeof (struct sockaddr_storage)
1080                 + sizeof (struct timeval);
1081
1082         ph = (pinghost_t *) malloc (ph_size);
1083         if (ph == NULL)
1084                 return (NULL);
1085
1086         memset (ph, '\0', ph_size);
1087
1088         ph->timer   = (struct timeval *) (ph + 1);
1089         ph->addr    = (struct sockaddr_storage *) (ph->timer + 1);
1090
1091         ph->addrlen = sizeof (struct sockaddr_storage);
1092         ph->fd      = -1;
1093         ph->latency = -1.0;
1094         ph->dropped = 0;
1095         ph->ident   = ping_get_ident () & 0xFFFF;
1096
1097         return (ph);
1098 }
1099
1100 static void ping_free (pinghost_t *ph)
1101 {
1102         if (ph->fd >= 0)
1103                 close (ph->fd);
1104
1105         if (ph->username != NULL)
1106                 free (ph->username);
1107
1108         if (ph->hostname != NULL)
1109                 free (ph->hostname);
1110
1111         if (ph->data != NULL)
1112                 free (ph->data);
1113
1114         free (ph);
1115 }
1116
1117 /*
1118  * public methods
1119  */
1120 const char *ping_get_error (pingobj_t *obj)
1121 {
1122         if (obj == NULL)
1123                 return (NULL);
1124         return (obj->errmsg);
1125 }
1126
1127 pingobj_t *ping_construct (void)
1128 {
1129         pingobj_t *obj;
1130
1131         if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
1132                 return (NULL);
1133         memset (obj, 0, sizeof (pingobj_t));
1134
1135         obj->timeout    = PING_DEF_TIMEOUT;
1136         obj->ttl        = PING_DEF_TTL;
1137         obj->addrfamily = PING_DEF_AF;
1138         obj->data       = strdup (PING_DEF_DATA);
1139         obj->qos        = 0;
1140
1141         return (obj);
1142 }
1143
1144 void ping_destroy (pingobj_t *obj)
1145 {
1146         pinghost_t *current;
1147         pinghost_t *next;
1148
1149         if (obj == NULL)
1150                 return;
1151
1152         current = obj->head;
1153         next = NULL;
1154
1155         while (current != NULL)
1156         {
1157                 next = current->next;
1158                 ping_free (current);
1159                 current = next;
1160         }
1161
1162         if (obj->data != NULL)
1163                 free (obj->data);
1164
1165         if (obj->srcaddr != NULL)
1166                 free (obj->srcaddr);
1167
1168         if (obj->device != NULL)
1169                 free (obj->device);
1170
1171         free (obj);
1172
1173         return;
1174 }
1175
1176 int ping_setopt (pingobj_t *obj, int option, void *value)
1177 {
1178         int ret = 0;
1179
1180         if ((obj == NULL) || (value == NULL))
1181                 return (-1);
1182
1183         switch (option)
1184         {
1185                 case PING_OPT_QOS:
1186                 {
1187                         pinghost_t *ph;
1188
1189                         obj->qos = *((uint8_t *) value);
1190                         for (ph = obj->head; ph != NULL; ph = ph->next)
1191                                 ping_set_qos (obj, ph, obj->qos);
1192                         break;
1193                 }
1194
1195                 case PING_OPT_TIMEOUT:
1196                         obj->timeout = *((double *) value);
1197                         if (obj->timeout < 0.0)
1198                         {
1199                                 obj->timeout = PING_DEF_TIMEOUT;
1200                                 ret = -1;
1201                         }
1202                         break;
1203
1204                 case PING_OPT_TTL:
1205                         obj->ttl = *((int *) value);
1206                         if ((obj->ttl < 1) || (obj->ttl > 255))
1207                         {
1208                                 obj->ttl = PING_DEF_TTL;
1209                                 ret = -1;
1210                         }
1211                         else
1212                         {
1213                                 pinghost_t *ph;
1214
1215                                 for (ph = obj->head; ph != NULL; ph = ph->next)
1216                                         ping_set_ttl (ph, obj->ttl);
1217                         }
1218                         break;
1219
1220                 case PING_OPT_AF:
1221                         obj->addrfamily = *((int *) value);
1222                         if ((obj->addrfamily != AF_UNSPEC)
1223                                         && (obj->addrfamily != AF_INET)
1224                                         && (obj->addrfamily != AF_INET6))
1225                         {
1226                                 obj->addrfamily = PING_DEF_AF;
1227                                 ret = -1;
1228                         }
1229                         if (obj->srcaddr != NULL)
1230                         {
1231                                 free (obj->srcaddr);
1232                                 obj->srcaddr = NULL;
1233                         }
1234                         break;
1235
1236                 case PING_OPT_DATA:
1237                         if (obj->data != NULL)
1238                         {
1239                                 free (obj->data);
1240                                 obj->data = NULL;
1241                         }
1242                         obj->data = strdup ((const char *) value);
1243                         break;
1244
1245                 case PING_OPT_SOURCE:
1246                 {
1247                         char            *hostname = (char *) value;
1248                         struct addrinfo  ai_hints;
1249                         struct addrinfo *ai_list;
1250                         int              status;
1251 #if WITH_DEBUG
1252                         if (obj->addrfamily != AF_UNSPEC)
1253                         {
1254                                 dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
1255                         }
1256 #endif
1257                         memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
1258                         ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
1259 #if defined(AI_ADDRCONFIG)
1260                         ai_hints.ai_flags = AI_ADDRCONFIG;
1261 #endif
1262                         status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
1263                         if (status != 0)
1264                         {
1265 #if defined(EAI_SYSTEM)
1266                                 char errbuf[PING_ERRMSG_LEN];
1267 #endif
1268                                 ping_set_error (obj, "getaddrinfo",
1269 #if defined(EAI_SYSTEM)
1270                                                 (status == EAI_SYSTEM)
1271                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1272 #endif
1273                                                 gai_strerror (status));
1274                                 ret = -1;
1275                                 break;
1276                         }
1277 #if WITH_DEBUG
1278                         if (ai_list->ai_next != NULL)
1279                         {
1280                                 dprintf ("hostname = `%s' is ambiguous.\n", hostname);
1281                         }
1282 #endif
1283                         if (obj->srcaddr == NULL)
1284                         {
1285                                 obj->srcaddrlen = 0;
1286                                 obj->srcaddr = malloc (sizeof (struct sockaddr_storage));
1287                                 if (obj->srcaddr == NULL)
1288                                 {
1289                                         ping_set_errno (obj, errno);
1290                                         ret = -1;
1291                                         freeaddrinfo (ai_list);
1292                                         break;
1293                                 }
1294                         }
1295                         memset ((void *) obj->srcaddr, 0, sizeof (struct sockaddr_storage));
1296                         assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
1297                         memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
1298                                         ai_list->ai_addrlen);
1299                         obj->srcaddrlen = ai_list->ai_addrlen;
1300                         obj->addrfamily = ai_list->ai_family;
1301
1302                         freeaddrinfo (ai_list);
1303                 } /* case PING_OPT_SOURCE */
1304                 break;
1305
1306                 case PING_OPT_DEVICE:
1307                 {
1308 #ifdef SO_BINDTODEVICE
1309                         char *device = strdup ((char *) value);
1310
1311                         if (device == NULL)
1312                         {
1313                                 ping_set_errno (obj, errno);
1314                                 ret = -1;
1315                                 break;
1316                         }
1317
1318                         if (obj->device != NULL)
1319                                 free (obj->device);
1320                         obj->device = device;
1321 #else /* ! SO_BINDTODEVICE */
1322                         ping_set_errno (obj, ENOTSUP);
1323                         ret = -1;
1324 #endif /* ! SO_BINDTODEVICE */
1325                 } /* case PING_OPT_DEVICE */
1326                 break;
1327
1328                 case PING_OPT_MARK:
1329                 {
1330 #ifdef SO_MARK
1331                         obj->mark     = *(int*)(value);
1332                         obj->set_mark = 1;
1333 #else /* SO_MARK */
1334                         ping_set_errno (obj, ENOTSUP);
1335                         ret = -1;
1336 #endif /* !SO_MARK */
1337
1338                 } /* case PING_OPT_MARK */
1339                 break;
1340
1341                 default:
1342                         ret = -2;
1343         } /* switch (option) */
1344
1345         return (ret);
1346 } /* int ping_setopt */
1347
1348
1349 int ping_send (pingobj_t *obj)
1350 {
1351         if (obj == NULL)
1352                 return (-1);
1353
1354         if (ping_send_all (obj) < 0)
1355                 return (-1);
1356
1357         return (ping_receive_all (obj));
1358 }
1359
1360 static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
1361 {
1362         while (ph != NULL)
1363         {
1364                 if (strcasecmp (ph->username, host) == 0)
1365                         break;
1366
1367                 ph = ph->next;
1368         }
1369
1370         return (ph);
1371 }
1372
1373 int ping_host_add (pingobj_t *obj, const char *host)
1374 {
1375         pinghost_t *ph;
1376
1377         struct addrinfo  ai_hints;
1378         struct addrinfo *ai_list, *ai_ptr;
1379         int              ai_return;
1380
1381         if ((obj == NULL) || (host == NULL))
1382                 return (-1);
1383
1384         dprintf ("host = %s\n", host);
1385
1386         if (ping_host_search (obj->head, host) != NULL)
1387                 return (0);
1388
1389         memset (&ai_hints, '\0', sizeof (ai_hints));
1390         ai_hints.ai_flags     = 0;
1391 #ifdef AI_ADDRCONFIG
1392         ai_hints.ai_flags    |= AI_ADDRCONFIG;
1393 #endif
1394 #ifdef AI_CANONNAME
1395         ai_hints.ai_flags    |= AI_CANONNAME;
1396 #endif
1397         ai_hints.ai_family    = obj->addrfamily;
1398         ai_hints.ai_socktype  = SOCK_RAW;
1399
1400         if ((ph = ping_alloc ()) == NULL)
1401         {
1402                 dprintf ("Out of memory!\n");
1403                 return (-1);
1404         }
1405
1406         if ((ph->username = strdup (host)) == NULL)
1407         {
1408                 dprintf ("Out of memory!\n");
1409                 ping_set_errno (obj, errno);
1410                 ping_free (ph);
1411                 return (-1);
1412         }
1413
1414         if ((ph->hostname = strdup (host)) == NULL)
1415         {
1416                 dprintf ("Out of memory!\n");
1417                 ping_set_errno (obj, errno);
1418                 ping_free (ph);
1419                 return (-1);
1420         }
1421
1422         /* obj->data is not garuanteed to be != NULL */
1423         if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
1424         {
1425                 dprintf ("Out of memory!\n");
1426                 ping_set_errno (obj, errno);
1427                 ping_free (ph);
1428                 return (-1);
1429         }
1430
1431         if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
1432         {
1433 #if defined(EAI_SYSTEM)
1434                 char errbuf[PING_ERRMSG_LEN];
1435 #endif
1436                 dprintf ("getaddrinfo failed\n");
1437                 ping_set_error (obj, "getaddrinfo",
1438 #if defined(EAI_SYSTEM)
1439                                                 (ai_return == EAI_SYSTEM)
1440                                                 ? sstrerror (errno, errbuf, sizeof (errbuf)) :
1441 #endif
1442                                 gai_strerror (ai_return));
1443                 ping_free (ph);
1444                 return (-1);
1445         }
1446
1447         if (ai_list == NULL)
1448                 ping_set_error (obj, "getaddrinfo", "No hosts returned");
1449
1450         for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1451         {
1452                 ph->fd = -1;
1453
1454                 if (ai_ptr->ai_family == AF_INET)
1455                 {
1456                         ai_ptr->ai_socktype = SOCK_RAW;
1457                         ai_ptr->ai_protocol = IPPROTO_ICMP;
1458                 }
1459                 else if (ai_ptr->ai_family == AF_INET6)
1460                 {
1461                         ai_ptr->ai_socktype = SOCK_RAW;
1462                         ai_ptr->ai_protocol = IPPROTO_ICMPV6;
1463                 }
1464                 else
1465                 {
1466                         char errmsg[PING_ERRMSG_LEN];
1467
1468                         snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
1469                         errmsg[PING_ERRMSG_LEN - 1] = '\0';
1470
1471                         dprintf ("%s", errmsg);
1472                         ping_set_error (obj, "getaddrinfo", errmsg);
1473                         continue;
1474                 }
1475
1476                 /* TODO: Move this to a static function `ping_open_socket' and
1477                  * call it whenever the socket dies. */
1478                 ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1479                 if (ph->fd == -1)
1480                 {
1481 #if WITH_DEBUG
1482                         char errbuf[PING_ERRMSG_LEN];
1483                         dprintf ("socket: %s\n",
1484                                         sstrerror (errno, errbuf, sizeof (errbuf)));
1485 #endif
1486                         ping_set_errno (obj, errno);
1487                         continue;
1488                 }
1489
1490                 if (obj->srcaddr != NULL)
1491                 {
1492                         assert (obj->srcaddrlen > 0);
1493                         assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
1494
1495                         if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
1496                         {
1497 #if WITH_DEBUG
1498                                 char errbuf[PING_ERRMSG_LEN];
1499                                 dprintf ("bind: %s\n",
1500                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1501 #endif
1502                                 ping_set_errno (obj, errno);
1503                                 close (ph->fd);
1504                                 ph->fd = -1;
1505                                 continue;
1506                         }
1507                 }
1508
1509 #ifdef SO_BINDTODEVICE
1510                 if (obj->device != NULL)
1511                 {
1512                         if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
1513                                         obj->device, strlen (obj->device) + 1) != 0)
1514                         {
1515 #if WITH_DEBUG
1516                                 char errbuf[PING_ERRMSG_LEN];
1517                                 dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
1518                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1519 #endif
1520                                 ping_set_errno (obj, errno);
1521                                 close (ph->fd);
1522                                 ph->fd = -1;
1523                                 continue;
1524                         }
1525                 }
1526 #endif /* SO_BINDTODEVICE */
1527 #ifdef SO_MARK
1528                 if(obj->set_mark)
1529                 {
1530                         if(setsockopt(ph->fd, SOL_SOCKET, SO_MARK, &(obj->mark), sizeof(obj->mark)) != 0)
1531                         {
1532 #if WITH_DEBUG
1533                                 char errbuf[PING_ERRMSG_LEN];
1534                                 dprintf ("setsockopt (SO_MARK): %s\n",
1535                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1536 #endif
1537                                 ping_set_errno (obj, errno);
1538                                 close (ph->fd);
1539                                 ph->fd = -1;
1540                                 continue;
1541                         }
1542                 }
1543 #endif
1544 #ifdef SO_TIMESTAMP
1545                 if (1) /* {{{ */
1546                 {
1547                         int status;
1548                         int opt = 1;
1549
1550                         status = setsockopt (ph->fd,
1551                                         SOL_SOCKET, SO_TIMESTAMP,
1552                                         &opt, sizeof (opt));
1553                         if (status != 0)
1554                         {
1555 #if WITH_DEBUG
1556                                 char errbuf[PING_ERRMSG_LEN];
1557                                 dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
1558                                                 sstrerror (errno, errbuf, sizeof (errbuf)));
1559 #endif
1560                                 ping_set_errno (obj, errno);
1561                                 close (ph->fd);
1562                                 ph->fd = -1;
1563                                 continue;
1564                         }
1565                 } /* }}} if (1) */
1566 #endif /* SO_TIMESTAMP */
1567                 assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
1568                 memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
1569                 memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1570                 ph->addrlen = ai_ptr->ai_addrlen;
1571                 ph->addrfamily = ai_ptr->ai_family;
1572
1573 #ifdef AI_CANONNAME
1574                 if ((ai_ptr->ai_canonname != NULL)
1575                                 && (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
1576                 {
1577                         char *old_hostname;
1578
1579                         dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
1580                                         ph->hostname, ai_ptr->ai_canonname);
1581
1582                         old_hostname = ph->hostname;
1583                         if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
1584                         {
1585                                 /* strdup failed, falling back to old hostname */
1586                                 ph->hostname = old_hostname;
1587                         }
1588                         else if (old_hostname != NULL)
1589                         {
1590                                 free (old_hostname);
1591                         }
1592                 }
1593 #endif /* AI_CANONNAME */
1594
1595                 if (ph->addrfamily == AF_INET)
1596                 {
1597                         int opt;
1598
1599 #ifdef IP_RECVTOS
1600                         /* Enable receiving the TOS field */
1601                         opt = 1;
1602                         setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
1603                                         &opt, sizeof (opt));
1604 #endif  /* IP_RECVTOS */
1605
1606                         /* Enable receiving the TTL field */
1607                         opt = 1;
1608                         setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
1609                                         &opt, sizeof (opt));
1610                 }
1611 #if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
1612                 else if (ph->addrfamily == AF_INET6)
1613                 {
1614                         int opt;
1615
1616 # if defined(IPV6_RECVHOPLIMIT)
1617                         /* For details see RFC 3542, section 6.3. */
1618                         opt = 1;
1619                         setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
1620                                         &opt, sizeof (opt));
1621 # endif /* IPV6_RECVHOPLIMIT */
1622
1623 # if defined(IPV6_RECVTCLASS)
1624                         /* For details see RFC 3542, section 6.5. */
1625                         opt = 1;
1626                         setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
1627                                         &opt, sizeof (opt));
1628 # endif /* IPV6_RECVTCLASS */
1629                 }
1630 #endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
1631
1632                 break;
1633         } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
1634
1635         freeaddrinfo (ai_list);
1636
1637         if (ph->fd < 0)
1638         {
1639                 ping_free (ph);
1640                 return (-1);
1641         }
1642
1643         /*
1644          * Adding in the front is much easier, but then the iterator will
1645          * return the host that was added last as first host. That's just not
1646          * nice. -octo
1647          */
1648         if (obj->head == NULL)
1649         {
1650                 obj->head = ph;
1651         }
1652         else
1653         {
1654                 pinghost_t *hptr;
1655
1656                 hptr = obj->head;
1657                 while (hptr->next != NULL)
1658                         hptr = hptr->next;
1659
1660                 assert ((hptr != NULL) && (hptr->next == NULL));
1661                 hptr->next = ph;
1662         }
1663
1664         ping_set_ttl (ph, obj->ttl);
1665         ping_set_qos (obj, ph, obj->qos);
1666
1667         return (0);
1668 } /* int ping_host_add */
1669
1670 int ping_host_remove (pingobj_t *obj, const char *host)
1671 {
1672         pinghost_t *pre, *cur;
1673
1674         if ((obj == NULL) || (host == NULL))
1675                 return (-1);
1676
1677         pre = NULL;
1678         cur = obj->head;
1679
1680         while (cur != NULL)
1681         {
1682                 if (strcasecmp (host, cur->username) == 0)
1683                         break;
1684
1685                 pre = cur;
1686                 cur = cur->next;
1687         }
1688
1689         if (cur == NULL)
1690         {
1691                 ping_set_error (obj, "ping_host_remove", "Host not found");
1692                 return (-1);
1693         }
1694
1695         if (pre == NULL)
1696                 obj->head = cur->next;
1697         else
1698                 pre->next = cur->next;
1699
1700         ping_free (cur);
1701
1702         return (0);
1703 }
1704
1705 pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
1706 {
1707         if (obj == NULL)
1708                 return (NULL);
1709         return ((pingobj_iter_t *) obj->head);
1710 }
1711
1712 pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
1713 {
1714         if (iter == NULL)
1715                 return (NULL);
1716         return ((pingobj_iter_t *) iter->next);
1717 }
1718
1719 int ping_iterator_get_info (pingobj_iter_t *iter, int info,
1720                 void *buffer, size_t *buffer_len)
1721 {
1722         int ret = EINVAL;
1723
1724         size_t orig_buffer_len = *buffer_len;
1725
1726         if ((iter == NULL) || (buffer_len == NULL))
1727                 return (-1);
1728
1729         if ((buffer == NULL) && (*buffer_len != 0 ))
1730                 return (-1);
1731
1732         switch (info)
1733         {
1734                 case PING_INFO_USERNAME:
1735                         ret = ENOMEM;
1736                         *buffer_len = strlen (iter->username) + 1;
1737                         if (orig_buffer_len <= *buffer_len)
1738                                 break;
1739                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1740                          * will copy `*buffer_len' and pad the rest of
1741                          * `buffer' with null-bytes */
1742                         strncpy (buffer, iter->username, orig_buffer_len);
1743                         ret = 0;
1744                         break;
1745
1746                 case PING_INFO_HOSTNAME:
1747                         ret = ENOMEM;
1748                         *buffer_len = strlen (iter->hostname) + 1;
1749                         if (orig_buffer_len < *buffer_len)
1750                                 break;
1751                         /* Since (orig_buffer_len > *buffer_len) `strncpy'
1752                          * will copy `*buffer_len' and pad the rest of
1753                          * `buffer' with null-bytes */
1754                         strncpy (buffer, iter->hostname, orig_buffer_len);
1755                         ret = 0;
1756                         break;
1757
1758                 case PING_INFO_ADDRESS:
1759                         ret = getnameinfo ((struct sockaddr *) iter->addr,
1760                                         iter->addrlen,
1761                                         (char *) buffer,
1762                                         *buffer_len,
1763                                         NULL, 0,
1764                                         NI_NUMERICHOST);
1765                         if (ret != 0)
1766                         {
1767                                 if ((ret == EAI_MEMORY)
1768 #ifdef EAI_OVERFLOW
1769                                                 || (ret == EAI_OVERFLOW)
1770 #endif
1771                                    )
1772                                         ret = ENOMEM;
1773 #if defined(EAI_SYSTEM)
1774                                 else if (ret == EAI_SYSTEM)
1775                                         ret = errno;
1776 #endif
1777                                 else
1778                                         ret = EINVAL;
1779                         }
1780                         break;
1781
1782                 case PING_INFO_FAMILY:
1783                         ret = ENOMEM;
1784                         *buffer_len = sizeof (int);
1785                         if (orig_buffer_len < sizeof (int))
1786                                 break;
1787                         *((int *) buffer) = iter->addrfamily;
1788                         ret = 0;
1789                         break;
1790
1791                 case PING_INFO_LATENCY:
1792                         ret = ENOMEM;
1793                         *buffer_len = sizeof (double);
1794                         if (orig_buffer_len < sizeof (double))
1795                                 break;
1796                         *((double *) buffer) = iter->latency;
1797                         ret = 0;
1798                         break;
1799
1800                 case PING_INFO_DROPPED:
1801                         ret = ENOMEM;
1802                         *buffer_len = sizeof (uint32_t);
1803                         if (orig_buffer_len < sizeof (uint32_t))
1804                                 break;
1805                         *((uint32_t *) buffer) = iter->dropped;
1806                         ret = 0;
1807                         break;
1808
1809                 case PING_INFO_SEQUENCE:
1810                         ret = ENOMEM;
1811                         *buffer_len = sizeof (unsigned int);
1812                         if (orig_buffer_len < sizeof (unsigned int))
1813                                 break;
1814                         *((unsigned int *) buffer) = (unsigned int) iter->sequence;
1815                         ret = 0;
1816                         break;
1817
1818                 case PING_INFO_IDENT:
1819                         ret = ENOMEM;
1820                         *buffer_len = sizeof (uint16_t);
1821                         if (orig_buffer_len < sizeof (uint16_t))
1822                                 break;
1823                         *((uint16_t *) buffer) = (uint16_t) iter->ident;
1824                         ret = 0;
1825                         break;
1826
1827                 case PING_INFO_DATA:
1828                         ret = ENOMEM;
1829                         *buffer_len = strlen (iter->data);
1830                         if (orig_buffer_len < *buffer_len)
1831                                 break;
1832                         strncpy ((char *) buffer, iter->data, orig_buffer_len);
1833                         ret = 0;
1834                         break;
1835
1836                 case PING_INFO_RECV_TTL:
1837                         ret = ENOMEM;
1838                         *buffer_len = sizeof (int);
1839                         if (orig_buffer_len < sizeof (int))
1840                                 break;
1841                         *((int *) buffer) = iter->recv_ttl;
1842                         ret = 0;
1843                         break;
1844
1845                 case PING_INFO_RECV_QOS:
1846                         ret = ENOMEM;
1847                         if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
1848                         if (!*buffer_len) *buffer_len=1;
1849                         if (orig_buffer_len < *buffer_len)
1850                                 break;
1851                         memcpy(buffer,&iter->recv_qos,*buffer_len);
1852                         ret = 0;
1853                         break;
1854         }
1855
1856         return (ret);
1857 } /* ping_iterator_get_info */
1858
1859 void *ping_iterator_get_context (pingobj_iter_t *iter)
1860 {
1861         if (iter == NULL)
1862                 return (NULL);
1863         return (iter->context);
1864 }
1865
1866 void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
1867 {
1868         if (iter == NULL)
1869                 return;
1870         iter->context = context;
1871 }