-/**
- * Object oriented C module to send ICMP and ICMPv6 `echo's.
- * Copyright (C) 2006 Florian octo Forster <octo at verplant.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#if STDC_HEADERS
-# include <stdlib.h>
-# include <stdio.h>
-# include <string.h>
-# include <errno.h>
-# include <assert.h>
-#else
-# error "You don't have the standard C99 header files installed"
-#endif /* STDC_HEADERS */
-
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-
-#if HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
-#if HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-#if HAVE_SYS_STAT_H
-# include <sys/stat.h>
-#endif
-
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
-#if HAVE_SYS_SOCKET_H
-# include <sys/socket.h>
-#endif
-#if HAVE_NETDB_H
-# include <netdb.h>
-#endif
-
-#if HAVE_NETINET_IN_SYSTM_H
-# include <netinet/in_systm.h>
-#endif
-#if HAVE_NETINET_IN_H
-# include <netinet/in.h>
-#endif
-#if HAVE_NETINET_IP_H
-# include <netinet/ip.h>
-#endif
-#if HAVE_NETINET_IP_ICMP_H
-# include <netinet/ip_icmp.h>
-#endif
-#ifdef HAVE_NETINET_IP_VAR_H
-# include <netinet/ip_var.h>
-#endif
-#if HAVE_NETINET_IP6_H
-# include <netinet/ip6.h>
-#endif
-#if HAVE_NETINET_ICMP6_H
-# include <netinet/icmp6.h>
-#endif
-
-#include "oping.h"
-
-#if WITH_DEBUG
-# define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
-#else
-# define dprintf(...) /**/
-#endif
-
-#define PING_ERRMSG_LEN 256
-
-struct pinghost
-{
- char *hostname;
- struct sockaddr_storage *addr;
- socklen_t addrlen;
- int addrfamily;
- int fd;
- int ident;
- int sequence;
- struct timeval *timer;
- double latency;
- char *data;
-
- void *context;
-
- struct pinghost *next;
-};
-
-struct pingobj
-{
- double timeout;
- int ttl;
- int addrfamily;
- char *data;
-
- char errmsg[PING_ERRMSG_LEN];
-
- pinghost_t *head;
-};
-
-/*
- * private (static) functions
- */
-static void ping_set_error (pingobj_t *obj, const char *function,
- const char *message)
-{
- snprintf (obj->errmsg, PING_ERRMSG_LEN, "%s: %s", function, message);
- obj->errmsg[PING_ERRMSG_LEN - 1] = '\0';
-}
-
-static int ping_timeval_add (struct timeval *tv1, struct timeval *tv2,
- struct timeval *res)
-{
- res->tv_sec = tv1->tv_sec + tv2->tv_sec;
- res->tv_usec = tv1->tv_usec + tv2->tv_usec;
-
- while (res->tv_usec > 1000000)
- {
- res->tv_usec -= 1000000;
- res->tv_sec++;
- }
-
- return (0);
-}
-
-static int ping_timeval_sub (struct timeval *tv1, struct timeval *tv2,
- struct timeval *res)
-{
-
- if ((tv1->tv_sec < tv2->tv_sec)
- || ((tv1->tv_sec == tv2->tv_sec)
- && (tv1->tv_usec < tv2->tv_usec)))
- return (-1);
-
- res->tv_sec = tv1->tv_sec - tv2->tv_sec;
- res->tv_usec = tv1->tv_usec - tv2->tv_usec;
-
- assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec > 0)));
-
- while (res->tv_usec < 0)
- {
- res->tv_usec += 1000000;
- res->tv_sec--;
- }
-
- return (0);
-}
-
-static uint16_t ping_icmp4_checksum (char *buf, size_t len)
-{
- uint32_t sum = 0;
- uint16_t ret = 0;
-
- uint16_t *ptr;
-
- for (ptr = (uint16_t *) buf; len > 1; ptr++, len -= 2)
- sum += *ptr;
-
- if (len == 1)
- {
- *(char *) &ret = *(char *) ptr;
- sum += ret;
- }
-
- /* Do this twice to get all possible carries.. */
- sum = (sum >> 16) + (sum & 0xFFFF);
- sum = (sum >> 16) + (sum & 0xFFFF);
-
- ret = ~sum;
-
- return (ret);
-}
-
-static pinghost_t *ping_receive_ipv4 (pinghost_t *ph, char *buffer, size_t buffer_len)
-{
- struct ip *ip_hdr;
- struct icmp *icmp_hdr;
-
- size_t ip_hdr_len;
-
- uint16_t recv_checksum;
- uint16_t calc_checksum;
-
- uint16_t ident;
- uint16_t seq;
-
- pinghost_t *ptr;
-
- if (buffer_len < sizeof (struct ip))
- return (NULL);
-
- ip_hdr = (struct ip *) buffer;
- ip_hdr_len = ip_hdr->ip_hl << 2;
-
- if (buffer_len < ip_hdr_len)
- return (NULL);
-
- buffer += ip_hdr_len;
- buffer_len -= ip_hdr_len;
-
- if (buffer_len < sizeof (struct icmp))
- return (NULL);
-
- icmp_hdr = (struct icmp *) buffer;
- buffer += sizeof (struct icmp);
- buffer_len -= sizeof (struct icmp);
-
- if (icmp_hdr->icmp_type != ICMP_ECHOREPLY)
- {
- dprintf ("Unexpected ICMP type: %i\n", icmp_hdr->icmp_type);
- return (NULL);
- }
-
- recv_checksum = icmp_hdr->icmp_cksum;
- icmp_hdr->icmp_cksum = 0;
- calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
- sizeof (struct icmp) + buffer_len);
-
- if (recv_checksum != calc_checksum)
- {
- dprintf ("Checksum missmatch: Got 0x%04x, calculated 0x%04x\n",
- recv_checksum, calc_checksum);
- return (NULL);
- }
-
- ident = ntohs (icmp_hdr->icmp_id);
- seq = ntohs (icmp_hdr->icmp_seq);
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- {
- dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
- ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
-
- if (ptr->addrfamily != AF_INET)
- continue;
-
- if (!timerisset (ptr->timer))
- continue;
-
- if (ptr->ident != ident)
- continue;
-
- if (((ptr->sequence - 1) & 0xFFFF) != seq)
- continue;
-
- dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
- ptr->hostname, ident, seq);
-
- break;
- }
-
- if (ptr == NULL)
- {
- dprintf ("No match found for ident = 0x%04x, seq = %i\n",
- ident, seq);
- }
-
- return (ptr);
-}
-
-static pinghost_t *ping_receive_ipv6 (pinghost_t *ph, char *buffer, size_t buffer_len)
-{
- struct icmp6_hdr *icmp_hdr;
-
- uint16_t ident;
- uint16_t seq;
-
- pinghost_t *ptr;
-
- if (buffer_len < sizeof (struct icmp6_hdr))
- return (NULL);
-
- icmp_hdr = (struct icmp6_hdr *) buffer;
- buffer += sizeof (struct icmp);
- buffer_len -= sizeof (struct icmp);
-
- if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
- {
- dprintf ("Unexpected ICMP type: %02x\n", icmp_hdr->icmp6_type);
- return (NULL);
- }
-
- if (icmp_hdr->icmp6_code != 0)
- {
- dprintf ("Unexpected ICMP code: %02x\n", icmp_hdr->icmp6_code);
- return (NULL);
- }
-
- ident = ntohs (icmp_hdr->icmp6_id);
- seq = ntohs (icmp_hdr->icmp6_seq);
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- {
- dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
- ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
-
- if (ptr->addrfamily != AF_INET6)
- continue;
-
- if (!timerisset (ptr->timer))
- continue;
-
- if (ptr->ident != ident)
- continue;
-
- if (((ptr->sequence - 1) & 0xFFFF) != seq)
- continue;
-
- dprintf ("Match found: hostname = %s, ident = 0x%04x, seq = %i\n",
- ptr->hostname, ident, seq);
-
- break;
- }
-
- if (ptr == NULL)
- {
- dprintf ("No match found for ident = 0x%04x, seq = %i\n",
- ident, seq);
- }
-
- return (ptr);
-}
-
-static int ping_receive_one (int fd, pinghost_t *ph, struct timeval *now)
-{
- char buffer[4096];
- size_t buffer_len;
-
- struct timeval diff;
-
- pinghost_t *host = NULL;
-
- struct sockaddr_storage sa;
- socklen_t sa_len;
-
- sa_len = sizeof (sa);
-
- buffer_len = recvfrom (fd, buffer, sizeof (buffer), 0,
- (struct sockaddr *) &sa, &sa_len);
- if (buffer_len == -1)
- {
- dprintf ("recvfrom: %s\n", strerror (errno));
- return (-1);
- }
-
- dprintf ("Read %u bytes from fd = %i\n", (unsigned int) buffer_len, fd);
-
- if (sa.ss_family == AF_INET)
- {
- if ((host = ping_receive_ipv4 (ph, buffer, buffer_len)) == NULL)
- return (-1);
- }
- else if (sa.ss_family == AF_INET6)
- {
- if ((host = ping_receive_ipv6 (ph, buffer, buffer_len)) == NULL)
- return (-1);
- }
-
- dprintf ("rcvd: %12i.%06i\n",
- (int) now->tv_sec,
- (int) now->tv_usec);
- dprintf ("sent: %12i.%06i\n",
- (int) host->timer->tv_sec,
- (int) host->timer->tv_usec);
-
- if (ping_timeval_sub (now, host->timer, &diff) < 0)
- {
- timerclear (host->timer);
- return (-1);
- }
-
- dprintf ("diff: %12i.%06i\n",
- (int) diff.tv_sec,
- (int) diff.tv_usec);
-
- host->latency = ((double) diff.tv_usec) / 1000.0;
- host->latency += ((double) diff.tv_sec) * 1000.0;
-
- timerclear (host->timer);
-
- return (0);
-}
-
-static int ping_receive_all (pingobj_t *obj)
-{
- fd_set readfds;
- int num_readfds;
- int max_readfds;
-
- pinghost_t *ph;
- pinghost_t *ptr;
-
- struct timeval endtime;
- struct timeval nowtime;
- struct timeval timeout;
- int status;
-
- int ret;
-
- ph = obj->head;
- ret = 0;
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- ptr->latency = -1.0;
-
- if (gettimeofday (&nowtime, NULL) == -1)
- {
- ping_set_error (obj, "gettimeofday", strerror (errno));
- return (-1);
- }
-
- /* Set up timeout */
- timeout.tv_sec = (time_t) obj->timeout;
- timeout.tv_usec = (suseconds_t) (1000000 * (obj->timeout - ((double) timeout.tv_sec)));
-
- dprintf ("Set timeout to %i.%06i seconds\n",
- (int) timeout.tv_sec,
- (int) timeout.tv_usec);
-
- ping_timeval_add (&nowtime, &timeout, &endtime);
-
- while (1)
- {
- FD_ZERO (&readfds);
- num_readfds = 0;
- max_readfds = -1;
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- {
- if (!timerisset (ptr->timer))
- continue;
-
- FD_SET (ptr->fd, &readfds);
- num_readfds++;
-
- if (max_readfds < ptr->fd)
- max_readfds = ptr->fd;
- }
-
- if (num_readfds == 0)
- break;
-
- if (gettimeofday (&nowtime, NULL) == -1)
- {
- ping_set_error (obj, "gettimeofday", strerror (errno));
- return (-1);
- }
-
- if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
- break;
-
- dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_readfds,
- (int) timeout.tv_sec,
- (int) timeout.tv_usec);
-
- status = select (max_readfds + 1, &readfds, NULL, NULL, &timeout);
-
- if (gettimeofday (&nowtime, NULL) == -1)
- {
- ping_set_error (obj, "gettimeofday", strerror (errno));
- return (-1);
- }
-
- if ((status == -1) && (errno == EINTR))
- {
- dprintf ("select was interrupted by signal..\n");
- continue;
- }
- else if (status < 0)
- {
- dprintf ("select: %s\n", strerror (errno));
- break;
- }
- else if (status == 0)
- {
- dprintf ("select timed out\n");
- break;
- }
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- {
- if (FD_ISSET (ptr->fd, &readfds))
- if (ping_receive_one (ptr->fd, ph, &nowtime) == 0)
- ret++;
- }
- } /* while (1) */
-
- return (ret);
-}
-
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Sending functions: *
- * *
- * ping_send_all *
- * +-> ping_send_one_ipv4 *
- * `-> ping_send_one_ipv6 *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
- const void *buf, size_t buflen)
-{
- ssize_t ret;
-
- if (gettimeofday (ph->timer, NULL) == -1)
- {
- timerclear (ph->timer);
- return (-1);
- }
-
- ret = sendto (ph->fd, buf, buflen, 0,
- (struct sockaddr *) ph->addr, ph->addrlen);
-
- if (ret < 0)
- {
-#if defined(EHOSTUNREACH)
- if (errno == EHOSTUNREACH)
- return (0);
-#endif
-#if defined(ENETUNREACH)
- if (errno == ENETUNREACH)
- return (0);
-#endif
- ping_set_error (obj, "sendto", strerror (errno));
- }
-
- return (ret);
-}
-
-static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
-{
- struct icmp *icmp4;
- int status;
-
- char buf[4096];
- int buflen;
-
- char *data;
- int datalen;
-
- dprintf ("ph->hostname = %s\n", ph->hostname);
-
- memset (buf, '\0', sizeof (buf));
- icmp4 = (struct icmp *) buf;
- data = (char *) (icmp4 + 1);
-
- icmp4->icmp_type = ICMP_ECHO;
- icmp4->icmp_code = 0;
- icmp4->icmp_cksum = 0;
- icmp4->icmp_id = htons (ph->ident);
- icmp4->icmp_seq = htons (ph->sequence);
-
- buflen = 4096 - sizeof (struct icmp);
- strncpy (data, ph->data, buflen);
- datalen = strlen (data);
-
- buflen = datalen + sizeof (struct icmp);
-
- icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
-
- dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
-
- status = ping_sendto (obj, ph, buf, buflen);
- if (status < 0)
- {
- perror ("ping_sendto");
- return (-1);
- }
-
- dprintf ("sendto: status = %i\n", status);
-
- return (0);
-}
-
-static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
-{
- struct icmp6_hdr *icmp6;
- int status;
-
- char buf[4096];
- int buflen;
-
- char *data;
- int datalen;
-
- dprintf ("ph->hostname = %s\n", ph->hostname);
-
- memset (buf, '\0', sizeof (buf));
- icmp6 = (struct icmp6_hdr *) buf;
- data = (char *) (icmp6 + 1);
-
- icmp6->icmp6_type = ICMP6_ECHO_REQUEST;
- icmp6->icmp6_code = 0;
- /* The checksum will be calculated by the TCP/IP stack. */
- /* FIXME */
- icmp6->icmp6_cksum = 0;
- icmp6->icmp6_id = htons (ph->ident);
- icmp6->icmp6_seq = htons (ph->sequence);
-
- buflen = 4096 - sizeof (struct icmp6_hdr);
- strncpy (data, ph->data, buflen);
- datalen = strlen (data);
-
- buflen = datalen + sizeof (struct icmp6_hdr);
-
- dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
-
- status = ping_sendto (obj, ph, buf, buflen);
- if (status < 0)
- {
- perror ("ping_sendto");
- return (-1);
- }
-
- dprintf ("sendto: status = %i\n", status);
-
- return (0);
-}
-
-static int ping_send_all (pingobj_t *obj)
-{
- pinghost_t *ph;
- pinghost_t *ptr;
-
- int ret;
-
- ret = 0;
- ph = obj->head;
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- {
- /* start timer.. The GNU `ping6' starts the timer before
- * sending the packet, so I will do that too */
- if (gettimeofday (ptr->timer, NULL) == -1)
- {
- dprintf ("gettimeofday: %s\n", strerror (errno));
- timerclear (ptr->timer);
- ret--;
- continue;
- }
- else
- {
- dprintf ("timer set for hostname = %s\n", ptr->hostname);
- }
-
- if (ptr->addrfamily == AF_INET6)
- {
- dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
- if (ping_send_one_ipv6 (obj, ptr) != 0)
- {
- timerclear (ptr->timer);
- ret--;
- continue;
- }
- }
- else if (ptr->addrfamily == AF_INET)
- {
- dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
- if (ping_send_one_ipv4 (obj, ptr) != 0)
- {
- timerclear (ptr->timer);
- ret--;
- continue;
- }
- }
- else /* this should not happen */
- {
- dprintf ("Unknown address family: %i\n", ptr->addrfamily);
- timerclear (ptr->timer);
- ret--;
- continue;
- }
-
- ptr->sequence++;
- }
-
- return (ret);
-}
-
-/*
- * Set the TTL of a socket protocol independently.
- */
-static int ping_set_ttl (pinghost_t *ph, int ttl)
-{
- int ret = -2;
-
- if (ph->addrfamily == AF_INET)
- {
- ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL, &ttl, sizeof (ttl));
- }
- else if (ph->addrfamily == AF_INET6)
- {
- ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &ttl, sizeof (ttl));
- }
-
- return (ret);
-}
-
-static int ping_get_ident (void)
-{
- int fd;
- static int did_seed = 0;
-
- int retval;
-
- if (did_seed == 0)
- {
- if ((fd = open ("/dev/urandom", O_RDONLY)) != -1)
- {
- unsigned int seed;
-
- if (read (fd, &seed, sizeof (seed)) != -1)
- {
- did_seed = 1;
- dprintf ("Random seed: %i\n", seed);
- srandom (seed);
- }
-
- close (fd);
- }
- else
- {
- dprintf ("open (/dev/urandom): %s\n", strerror (errno));
- }
- }
-
- retval = (int) random ();
-
- dprintf ("Random number: %i\n", retval);
-
- return (retval);
-}
-
-static pinghost_t *ping_alloc (void)
-{
- pinghost_t *ph;
- size_t ph_size;
-
- ph_size = sizeof (pinghost_t)
- + sizeof (struct sockaddr_storage)
- + sizeof (struct timeval);
-
- ph = (pinghost_t *) malloc (ph_size);
- if (ph == NULL)
- return (NULL);
-
- memset (ph, '\0', ph_size);
-
- ph->timer = (struct timeval *) (ph + 1);
- ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
-
- ph->addrlen = sizeof (struct sockaddr_storage);
- ph->latency = -1.0;
- ph->ident = ping_get_ident () & 0xFFFF;
-
- return (ph);
-}
-
-static void ping_free (pinghost_t *ph)
-{
- if (ph->hostname != NULL)
- free (ph->hostname);
-
- if (ph->data != NULL)
- free (ph->data);
-
- free (ph);
-}
-
-/*
- * public methods
- */
-const char *ping_get_error (pingobj_t *obj)
-{
- return (obj->errmsg);
-}
-
-pingobj_t *ping_construct (void)
-{
- pingobj_t *obj;
-
- if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
- return (NULL);
- memset (obj, '\0', sizeof (pingobj_t));
-
- obj->timeout = PING_DEF_TIMEOUT;
- obj->ttl = PING_DEF_TTL;
- obj->addrfamily = PING_DEF_AF;
- obj->data = strdup (PING_DEF_DATA);
-
- return (obj);
-}
-
-void ping_destroy (pingobj_t *obj)
-{
- pinghost_t *current;
- pinghost_t *next;
-
- current = obj->head;
- next = NULL;
-
- while (current != NULL)
- {
- next = current->next;
- ping_free (current);
- current = next;
- }
-
- if (obj->data != NULL)
- free (obj->data);
-
- free (obj);
-
- return;
-}
-
-int ping_setopt (pingobj_t *obj, int option, void *value)
-{
- int ret = 0;
-
- switch (option)
- {
- case PING_OPT_TIMEOUT:
- obj->timeout = *((double *) value);
- if (obj->timeout < 0.0)
- {
- obj->timeout = PING_DEF_TIMEOUT;
- ret = -1;
- }
- break;
-
- case PING_OPT_TTL:
- obj->ttl = *((int *) value);
- if ((obj->ttl < 1) || (obj->ttl > 255))
- {
- obj->ttl = PING_DEF_TTL;
- ret = -1;
- }
- break;
-
- case PING_OPT_AF:
- obj->addrfamily = *((int *) value);
- if ((obj->addrfamily != AF_UNSPEC)
- && (obj->addrfamily != AF_INET)
- && (obj->addrfamily != AF_INET6))
- {
- obj->addrfamily = PING_DEF_AF;
- ret = -1;
- }
- break;
-
- case PING_OPT_DATA:
- if (obj->data != NULL)
- {
- free (obj->data);
- obj->data = NULL;
- }
- obj->data = strdup ((const char *) value);
- break;
-
- default:
- ret = -2;
- } /* switch (option) */
-
- return (ret);
-} /* int ping_setopt */
-
-
-int ping_send (pingobj_t *obj)
-{
- int ret;
-
- if (ping_send_all (obj) < 0)
- return (-1);
-
- if ((ret = ping_receive_all (obj)) < 0)
- return (-2);
-
- return (ret);
-}
-
-static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
-{
- while (ph != NULL)
- {
- if (strcasecmp (ph->hostname, host) == 0)
- break;
-
- ph = ph->next;
- }
-
- return (ph);
-}
-
-int ping_host_add (pingobj_t *obj, const char *host)
-{
- pinghost_t *ph;
-
- struct addrinfo ai_hints;
- struct addrinfo *ai_list, *ai_ptr;
- int ai_return;
-
- dprintf ("host = %s\n", host);
-
- if (ping_host_search (obj->head, host) != NULL)
- return (0);
-
- memset (&ai_hints, '\0', sizeof (ai_hints));
- ai_hints.ai_flags = 0;
-#ifdef AI_ADDRCONFIG
- ai_hints.ai_flags |= AI_ADDRCONFIG;
-#endif
- ai_hints.ai_family = obj->addrfamily;
- ai_hints.ai_socktype = SOCK_RAW;
-
- if ((ph = ping_alloc ()) == NULL)
- {
- dprintf ("Out of memory!\n");
- return (-1);
- }
-
- if ((ph->hostname = strdup (host)) == NULL)
- {
- dprintf ("Out of memory!\n");
- ping_set_error (obj, "strdup", strerror (errno));
- ping_free (ph);
- return (-1);
- }
-
- /* obj->data is not garuanteed to be != NULL */
- if ((ph->data = strdup (obj->data == NULL ? PING_DEF_DATA : obj->data)) == NULL)
- {
- dprintf ("Out of memory!\n");
- ping_set_error (obj, "strdup", strerror (errno));
- ping_free (ph);
- return (-1);
- }
-
- if ((ai_return = getaddrinfo (host, NULL, &ai_hints, &ai_list)) != 0)
- {
- dprintf ("getaddrinfo failed\n");
- ping_set_error (obj, "getaddrinfo",
- (ai_return == EAI_SYSTEM)
- ? strerror (errno)
- : gai_strerror (ai_return));
- ping_free (ph);
- return (-1);
- }
-
- if (ai_list == NULL)
- ping_set_error (obj, "getaddrinfo", "No hosts returned");
-
- for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
- {
- ph->fd = -1;
-
- if (ai_ptr->ai_family == AF_INET)
- {
- ai_ptr->ai_socktype = SOCK_RAW;
- ai_ptr->ai_protocol = IPPROTO_ICMP;
- }
- else if (ai_ptr->ai_family == AF_INET6)
- {
- ai_ptr->ai_socktype = SOCK_RAW;
- ai_ptr->ai_protocol = IPPROTO_ICMPV6;
- }
- else
- {
- char errmsg[PING_ERRMSG_LEN];
-
- snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
- errmsg[PING_ERRMSG_LEN - 1] = '\0';
-
- dprintf (errmsg);
- ping_set_error (obj, "getaddrinfo", errmsg);
- continue;
- }
-
- /* TODO: Move this to a static function `ping_open_socket' and
- * call it whenever the socket dies. */
- ph->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
- if (ph->fd == -1)
- {
- dprintf ("socket: %s\n", strerror (errno));
- ping_set_error (obj, "socket", strerror (errno));
- continue;
- }
-
-/*
- * The majority vote of operating systems has decided that you don't need to
- * bind here. This code should be reactivated to bind to a specific address,
- * though. See the `-I' option of `ping(1)' (GNU). -octo
- */
-#if 0
- if (bind (ph->fd, (struct sockaddr *) &sockaddr, sockaddr_len) == -1)
- {
- dprintf ("bind: %s\n", strerror (errno));
- ping_set_error (obj, "bind", strerror (errno));
- close (ph->fd);
- ph->fd = -1;
- continue;
- }
-#endif
-
- assert (sizeof (struct sockaddr_storage) >= ai_ptr->ai_addrlen);
- memset (ph->addr, '\0', sizeof (struct sockaddr_storage));
- memcpy (ph->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
- ph->addrlen = ai_ptr->ai_addrlen;
- ph->addrfamily = ai_ptr->ai_family;
-
- break;
- }
-
- freeaddrinfo (ai_list);
-
- if (ph->fd < 0)
- {
- free (ph->hostname);
- free (ph);
- return (-1);
- }
-
- /*
- * Adding in the front is much easier, but then the iterator will
- * return the host that was added last as first host. That's just not
- * nice. -octo
- */
- if (obj->head == NULL)
- {
- obj->head = ph;
- }
- else
- {
- pinghost_t *hptr;
-
- hptr = obj->head;
- while (hptr->next != NULL)
- hptr = hptr->next;
-
- assert ((hptr != NULL) && (hptr->next == NULL));
- hptr->next = ph;
- }
-
- ping_set_ttl (ph, obj->ttl);
-
- return (0);
-}
-
-int ping_host_remove (pingobj_t *obj, const char *host)
-{
- pinghost_t *pre, *cur;
-
- pre = NULL;
- cur = obj->head;
-
- while (cur != NULL)
- {
- if (strcasecmp (host, cur->hostname))
- break;
-
- pre = cur;
- cur = cur->next;
- }
-
- if (cur == NULL)
- {
- ping_set_error (obj, "ping_host_remove", "Host not found");
- return (-1);
- }
-
- if (pre == NULL)
- obj->head = cur->next;
- else
- pre->next = cur->next;
-
- if (cur->fd >= 0)
- close (cur->fd);
-
- ping_free (cur);
-
- return (0);
-}
-
-pingobj_iter_t *ping_iterator_get (pingobj_t *obj)
-{
- return ((pingobj_iter_t *) obj->head);
-}
-
-pingobj_iter_t *ping_iterator_next (pingobj_iter_t *iter)
-{
- return ((pingobj_iter_t *) iter->next);
-}
-
-int ping_iterator_get_info (pingobj_iter_t *iter, int info,
- void *buffer, size_t *buffer_len)
-{
- int ret = EINVAL;
-
- size_t orig_buffer_len = *buffer_len;
-
- switch (info)
- {
- case PING_INFO_HOSTNAME:
- ret = ENOMEM;
- *buffer_len = strlen (iter->hostname);
- if (orig_buffer_len <= *buffer_len)
- break;
- /* Since (orig_buffer_len > *buffer_len) `strncpy'
- * will copy `*buffer_len' and pad the rest of
- * `buffer' with null-bytes */
- strncpy (buffer, iter->hostname, orig_buffer_len);
- ret = 0;
- break;
-
- case PING_INFO_ADDRESS:
- ret = getnameinfo ((struct sockaddr *) iter->addr,
- iter->addrlen,
- (char *) buffer,
- *buffer_len,
- NULL, 0,
- NI_NUMERICHOST);
- if (ret != 0)
- {
- if ((ret == EAI_MEMORY)
-#ifdef EAI_OVERFLOW
- || (ret == EAI_OVERFLOW)
-#endif
- )
- ret = ENOMEM;
- else if (ret == EAI_SYSTEM)
- /* XXX: Not thread-safe! */
- ret = errno;
- else
- ret = EINVAL;
- }
- break;
-
- case PING_INFO_FAMILY:
- ret = ENOMEM;
- *buffer_len = sizeof (int);
- if (orig_buffer_len < sizeof (int))
- break;
- *((int *) buffer) = iter->addrfamily;
- ret = 0;
- break;
-
- case PING_INFO_LATENCY:
- ret = ENOMEM;
- *buffer_len = sizeof (double);
- if (orig_buffer_len < sizeof (double))
- break;
- *((double *) buffer) = iter->latency;
- ret = 0;
- break;
-
- case PING_INFO_SEQUENCE:
- ret = ENOMEM;
- *buffer_len = sizeof (unsigned int);
- if (orig_buffer_len < sizeof (unsigned int))
- break;
- *((unsigned int *) buffer) = (unsigned int) iter->sequence;
- ret = 0;
- break;
-
- case PING_INFO_IDENT:
- ret = ENOMEM;
- *buffer_len = sizeof (uint16_t);
- if (orig_buffer_len < sizeof (uint16_t))
- break;
- *((uint16_t *) buffer) = (uint16_t) iter->ident;
- ret = 0;
- break;
-
- case PING_INFO_DATA:
- ret = ENOMEM;
- *buffer_len = strlen (iter->data);
- if (orig_buffer_len < *buffer_len)
- break;
- strncpy ((char *) buffer, iter->data, orig_buffer_len);
- ret = 0;
- break;
- }
-
- return (ret);
-}
-
-void *ping_iterator_get_context (pingobj_iter_t *iter)
-{
- return (iter->context);
-}
-
-void ping_iterator_set_context (pingobj_iter_t *iter, void *context)
-{
- iter->context = context;
-}