/**
* 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; only version 2 of the License is
* applicable.
*
* 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;
struct sockaddr_storage *srcaddr;
socklen_t srcaddrlen;
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->fd = -1;
ph->latency = -1.0;
ph->ident = ping_get_ident () & 0xFFFF;
return (ph);
}
static void ping_free (pinghost_t *ph)
{
if (ph->fd >= 0)
close (ph->fd);
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);
if (obj->srcaddr != NULL)
free (obj->srcaddr);
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;
}
if (obj->srcaddr != NULL)
{
free (obj->srcaddr);
obj->srcaddr = NULL;
}
break;
case PING_OPT_DATA:
if (obj->data != NULL)
{
free (obj->data);
obj->data = NULL;
}
obj->data = strdup ((const char *) value);
break;
case PING_OPT_SOURCE:
{
char *hostname = (char *) value;
struct addrinfo ai_hints;
struct addrinfo *ai_list;
int status;
#if WITH_DEBUG
if (obj->addrfamily != AF_UNSPEC)
{
dprintf ("Resetting obj->addrfamily to AF_UNSPEC.\n");
}
#endif
memset ((void *) &ai_hints, '\0', sizeof (ai_hints));
ai_hints.ai_family = obj->addrfamily = AF_UNSPEC;
#if defined(AI_ADDRCONFIG)
ai_hints.ai_flags = AI_ADDRCONFIG;
#endif
status = getaddrinfo (hostname, NULL, &ai_hints, &ai_list);
if (status != 0)
{
ping_set_error (obj, "getaddrinfo",
status == EAI_SYSTEM
? strerror (errno)
: gai_strerror (status));
ret = -1;
break;
}
#if WITH_DEBUG
if (ai_list->ai_next != NULL)
{
dprintf ("hostname = `%s' is ambiguous.\n", hostname);
}
#endif
if (obj->srcaddr == NULL)
{
obj->srcaddrlen = 0;
obj->srcaddr = (struct sockaddr_storage *) malloc (sizeof (struct sockaddr_storage));
if (obj->srcaddr == NULL)
{
ping_set_error (obj, "malloc",
strerror (errno));
ret = -1;
freeaddrinfo (ai_list);
break;
}
}
memset ((void *) obj->srcaddr, '\0', sizeof (struct sockaddr_storage));
assert (ai_list->ai_addrlen <= sizeof (struct sockaddr_storage));
memcpy ((void *) obj->srcaddr, (const void *) ai_list->ai_addr,
ai_list->ai_addrlen);
obj->srcaddrlen = ai_list->ai_addrlen;
obj->addrfamily = ai_list->ai_family;
freeaddrinfo (ai_list);
} /* case PING_OPT_SOURCE */
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
#ifdef AI_CANONNAME
ai_hints.ai_flags |= AI_CANONNAME;
#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;
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 (obj->srcaddr != NULL)
{
assert (obj->srcaddrlen > 0);
assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
if (bind (ph->fd, (struct sockaddr *) obj->srcaddr, obj->srcaddrlen) == -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;
#ifdef AI_CANONNAME
if ((ai_ptr->ai_canonname != NULL)
&& (strcmp (ph->hostname, ai_ptr->ai_canonname) != 0))
{
char *old_hostname;
dprintf ("ph->hostname = %s; ai_ptr->ai_canonname = %s;\n",
ph->hostname, ai_ptr->ai_canonname);
old_hostname = ph->hostname;
if ((ph->hostname = strdup (ai_ptr->ai_canonname)) == NULL)
{
/* strdup failed, falling back to old hostname */
ph->hostname = old_hostname;
}
else if (old_hostname != NULL)
{
free (old_hostname);
}
}
#endif /* AI_CANONNAME */
break;
}
freeaddrinfo (ai_list);
if (ph->fd < 0)
{
ping_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) == 0)
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;
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;
}
syntax highlighted by Code2HTML, v. 0.9.1