+/**
+ * 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
+
+#ifndef __USE_BSD
+# define __USE_BSD
+#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 DEBUG
+# define dprintf(...) printf ("%s[%4i]: %-20s: ", __FILE__, __LINE__, __FUNCTION__); printf (__VA_ARGS__)
+#else
+# define dprintf(...) /**/
+#endif
+
+#define PING_ERRMSG_LEN 256
+
+#define PING_DATA "Florian Forster <octo@verplant.org> http://verplant.org/"
+
+struct pinghost
+{
+ char *hostname;
+ struct sockaddr_storage *addr;
+ socklen_t addrlen;
+ int addrfamily;
+ int fd;
+ int ident;
+ int sequence;
+ struct timeval *timer;
+ double latency;
+
+ void *context;
+
+ struct pinghost *next;
+};
+
+struct pingobj
+{
+ double timeout;
+ int ttl;
+ int addrfamily;
+
+ 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);
+
+ if (ptr->addrfamily != AF_INET)
+ continue;
+
+ if (!timerisset (ptr->timer))
+ continue;
+
+ if (ptr->ident != ident)
+ continue;
+
+ if ((ptr->sequence - 1) != 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);
+
+ if (ptr->addrfamily != AF_INET6)
+ continue;
+
+ if (!timerisset (ptr->timer))
+ continue;
+
+ if (ptr->ident != ident)
+ continue;
+
+ if ((ptr->sequence - 1) != 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 %i bytes from fd = %i\n", 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)
+ 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);
+
+ strcpy (data, PING_DATA);
+ 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. */
+ icmp6->icmp6_cksum = 0;
+ icmp6->icmp6_id = htons (ph->ident);
+ icmp6->icmp6_seq = htons (ph->sequence);
+
+ strcpy (data, PING_DATA);
+ 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);
+
+ 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;
+
+ 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;
+ }
+
+ 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;
+
+ 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 sockaddr_storage sockaddr;
+ socklen_t sockaddr_len;
+
+ 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);
+ }
+
+ 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;
+
+ sockaddr_len = sizeof (sockaddr);
+ memset (&sockaddr, '\0', sockaddr_len);
+
+ if (ai_ptr->ai_family == AF_INET)
+ {
+ struct sockaddr_in *si;
+
+ si = (struct sockaddr_in *) &sockaddr;
+ si->sin_family = AF_INET;
+ si->sin_port = htons (ph->ident);
+ si->sin_addr.s_addr = htonl (INADDR_ANY);
+
+ ai_ptr->ai_socktype = SOCK_RAW;
+ ai_ptr->ai_protocol = IPPROTO_ICMP;
+ }
+ else if (ai_ptr->ai_family == AF_INET6)
+ {
+ struct sockaddr_in6 *si;
+
+ si = (struct sockaddr_in6 *) &sockaddr;
+ si->sin6_family = AF_INET6;
+ si->sin6_port = htons (ph->ident);
+ si->sin6_addr = in6addr_any;
+
+ 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;
+ }
+
+ 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;
+ }
+
+ 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);
+ }
+
+ ph->next = obj->head;
+ obj->head = 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 (uint16_t);
+ if (orig_buffer_len < sizeof (uint16_t))
+ break;
+ *((uint16_t *) buffer) = (uint16_t) 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;
+ }
+
+ 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;
+}