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diff --git a/src/liboping.c b/src/liboping.c
index dc2b4494ee61cfce3e5af4c3e6b3a0c29a5aca0d..7af4e4a239ee17bf28828f2124bd52afc6a8772d 100644 (file)
--- a/src/liboping.c
+++ b/src/liboping.c
/**
* Object oriented C module to send ICMP and ICMPv6 `echo's.
- * Copyright (C) 2006-2009 Florian octo Forster <octo at verplant.org>
+ * Copyright (C) 2006-2016 Florian octo Forster <ff at octo.it>
*
- * 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
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version.
+ *
+ * This library 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 Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#ifdef __APPLE__
+#define __APPLE_USE_RFC_3542
+#endif
+
#if HAVE_CONFIG_H
# include <config.h>
#endif
double latency;
uint32_t dropped;
int recv_ttl;
+ uint8_t recv_qos;
char *data;
void *context;
double timeout;
int ttl;
int addrfamily;
+ uint8_t qos;
char *data;
struct sockaddr *srcaddr;
socklen_t srcaddrlen;
+ char *device;
+
+ char set_mark;
+ int mark;
+
char errmsg[PING_ERRMSG_LEN];
pinghost_t *head;
buffer += ip_hdr_len;
buffer_len -= ip_hdr_len;
- if (buffer_len < sizeof (struct icmp))
+ if (buffer_len < ICMP_MINLEN)
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);
+ dprintf ("Unexpected ICMP type: %"PRIu8"\n", icmp_hdr->icmp_type);
return (NULL);
}
recv_checksum = icmp_hdr->icmp_cksum;
+ /* This writes to buffer. */
icmp_hdr->icmp_cksum = 0;
- calc_checksum = ping_icmp4_checksum ((char *) icmp_hdr,
- sizeof (struct icmp) + buffer_len);
+ calc_checksum = ping_icmp4_checksum (buffer, buffer_len);
if (recv_checksum != calc_checksum)
{
ident, seq);
}
- if (ptr != NULL)
- ptr->recv_ttl = ip_hdr->ip_ttl;
-
+ if (ptr != NULL){
+ ptr->recv_ttl = (int) ip_hdr->ip_ttl;
+ ptr->recv_qos = (uint8_t) ip_hdr->ip_tos;
+ }
return (ptr);
}
pinghost_t *ptr;
- if (buffer_len < sizeof (struct icmp6_hdr))
+ if (buffer_len < ICMP_MINLEN)
return (NULL);
icmp_hdr = (struct icmp6_hdr *) buffer;
- buffer += sizeof (struct icmp);
- buffer_len -= sizeof (struct icmp);
+ buffer += ICMP_MINLEN;
+ buffer_len -= ICMP_MINLEN;
if (icmp_hdr->icmp6_type != ICMP6_ECHO_REPLY)
{
* reply. The right object will be returned by ping_receive_ipv*(). For
* now, we can only rely on ph->fd and ph->addrfamily. */
- struct timeval diff;
+ struct timeval diff, pkt_now = *now;
pinghost_t *host = NULL;
int recv_ttl;
+ uint8_t recv_qos;
/*
* Set up the receive buffer..
/* Iterate over all auxiliary data in msghdr */
recv_ttl = -1;
+ recv_qos = 0;
for (cmsg = CMSG_FIRSTHDR (&msghdr); /* {{{ */
cmsg != NULL;
cmsg = CMSG_NXTHDR (&msghdr, cmsg))
{
- if (ph->addrfamily == AF_INET) /* {{{ */
+ if (cmsg->cmsg_level == SOL_SOCKET)
+ {
+#ifdef SO_TIMESTAMP
+ if (cmsg->cmsg_type == SO_TIMESTAMP)
+ memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
+#endif /* SO_TIMESTAMP */
+ }
+ else if (ph->addrfamily == AF_INET) /* {{{ */
{
if (cmsg->cmsg_level != IPPROTO_IP)
continue;
+ if (cmsg->cmsg_type == IP_TOS)
+ {
+ memcpy (&recv_qos, CMSG_DATA (cmsg),
+ sizeof (recv_qos));
+ dprintf ("TOSv4 = 0x%02"PRIx8";\n", recv_qos);
+ } else
if (cmsg->cmsg_type == IP_TTL)
{
memcpy (&recv_ttl, CMSG_DATA (cmsg),
if (cmsg->cmsg_level != IPPROTO_IPV6)
continue;
+ if (cmsg->cmsg_type == IPV6_TCLASS)
+ {
+ memcpy (&recv_qos, CMSG_DATA (cmsg),
+ sizeof (recv_qos));
+ dprintf ("TOSv6 = 0x%02"PRIx8";\n", recv_qos);
+ } else
+#ifdef IPV6_HOPLIMIT
if (cmsg->cmsg_type == IPV6_HOPLIMIT)
{
memcpy (&recv_ttl, CMSG_DATA (cmsg),
dprintf ("TTLv6 = %i;\n", recv_ttl);
}
else
+#endif
+#ifdef IPV6_UNICAST_HOPS
+ if (cmsg->cmsg_type == IPV6_UNICAST_HOPS)
+ {
+ memcpy (&recv_ttl, CMSG_DATA (cmsg),
+ sizeof (recv_ttl));
+ dprintf ("TTLv6 = %i;\n", recv_ttl);
+ }
+ else
+#endif
+#ifdef IPV6_MULTICAST_HOPS
+ if (cmsg->cmsg_type == IPV6_MULTICAST_HOPS)
+ {
+ memcpy (&recv_ttl, CMSG_DATA (cmsg),
+ sizeof (recv_ttl));
+ dprintf ("TTLv6 = %i;\n", recv_ttl);
+ }
+ else
+#endif
{
dprintf ("Not handling option %i.\n",
cmsg->cmsg_type);
}
dprintf ("rcvd: %12i.%06i\n",
- (int) now->tv_sec,
- (int) now->tv_usec);
+ (int) pkt_now.tv_sec,
+ (int) pkt_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)
+ if (ping_timeval_sub (&pkt_now, host->timer, &diff) < 0)
{
timerclear (host->timer);
return (-1);
if (recv_ttl >= 0)
host->recv_ttl = recv_ttl;
+ host->recv_qos = recv_qos;
host->latency = ((double) diff.tv_usec) / 1000.0;
host->latency += ((double) diff.tv_sec) * 1000.0;
return (0);
}
+/* Blocks until a packet was received from all hosts or the timeout is reached.
+ * When interrupted, (-EINTR) is returned. On error, -1 is returned. On
+ * success, returns zero. */
static int ping_receive_all (pingobj_t *obj)
{
- fd_set readfds;
- int num_readfds;
- int max_readfds;
+ fd_set read_fds;
+ fd_set err_fds;
+ int num_fds;
+ int max_fd;
pinghost_t *ph;
pinghost_t *ptr;
while (1)
{
- FD_ZERO (&readfds);
- num_readfds = 0;
- max_readfds = -1;
+ FD_ZERO (&read_fds);
+ FD_ZERO (&err_fds);
+ num_fds = 0;
+ max_fd = -1;
for (ptr = ph; ptr != NULL; ptr = ptr->next)
{
if (!timerisset (ptr->timer))
continue;
- FD_SET (ptr->fd, &readfds);
- num_readfds++;
+ assert (ptr->fd < FD_SETSIZE);
+ FD_SET (ptr->fd, &read_fds);
+ FD_SET (ptr->fd, &err_fds);
+ num_fds++;
- if (max_readfds < ptr->fd)
- max_readfds = ptr->fd;
+ if (max_fd < ptr->fd)
+ max_fd = ptr->fd;
}
- if (num_readfds == 0)
+ if (num_fds == 0)
break;
if (gettimeofday (&nowtime, NULL) == -1)
if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
break;
- dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_readfds,
+ dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
(int) timeout.tv_sec,
(int) timeout.tv_usec);
- status = select (max_readfds + 1, &readfds, NULL, NULL, &timeout);
+ status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
if (gettimeofday (&nowtime, NULL) == -1)
{
if ((status == -1) && (errno == EINTR))
{
dprintf ("select was interrupted by signal..\n");
- continue;
+ ping_set_errno (obj, EINTR);
+ return (-EINTR);
}
else if (status < 0)
{
for (ptr = ph; ptr != NULL; ptr = ptr->next)
{
- if (FD_ISSET (ptr->fd, &readfds))
+ if (FD_ISSET (ptr->fd, &read_fds))
+ {
if (ping_receive_one (obj, ptr, &nowtime) == 0)
ret++;
+ }
+ else if (FD_ISSET (ptr->fd, &err_fds))
+ {
+ /* clear the timer in this case so that we
+ * don't run into an endless loop. */
+ /* TODO: Set an error flag in this case. */
+ timerclear (ptr->timer);
+ }
}
} /* while (1) */
return (ret);
-}
+} /* int ping_receive_all */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Sending functions: *
struct icmp *icmp4;
int status;
- char buf[4096];
- int buflen;
+ char buf[4096] = {0};
+ size_t buflen;
char *data;
- int datalen;
+ size_t datalen;
dprintf ("ph->hostname = %s\n", ph->hostname);
- memset (buf, '\0', sizeof (buf));
icmp4 = (struct icmp *) buf;
- data = (char *) (icmp4 + 1);
+ *icmp4 = (struct icmp) {
+ .icmp_type = ICMP_ECHO,
+ .icmp_id = htons (ph->ident),
+ .icmp_seq = htons (ph->sequence),
+ };
- 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);
+ datalen = strlen (ph->data);
+ buflen = ICMP_MINLEN + datalen;
+ if (sizeof (buf) < buflen)
+ return (EINVAL);
- buflen = 4096 - sizeof (struct icmp);
- strncpy (data, ph->data, buflen);
- datalen = strlen (data);
-
- buflen = datalen + sizeof (struct icmp);
+ data = buf + ICMP_MINLEN;
+ memcpy (data, ph->data, datalen);
icmp4->icmp_cksum = ping_icmp4_checksum (buf, buflen);
struct icmp6_hdr *icmp6;
int status;
- char buf[4096];
+ char buf[4096] = {0};
int buflen;
char *data;
dprintf ("ph->hostname = %s\n", ph->hostname);
- memset (buf, '\0', sizeof (buf));
icmp6 = (struct icmp6_hdr *) buf;
- data = (char *) (icmp6 + 1);
+ *icmp6 = (struct icmp6_hdr) {
+ .icmp6_type = ICMP6_ECHO_REQUEST,
+ .icmp6_id = htons (ph->ident),
+ .icmp6_seq = htons (ph->sequence),
+ };
- 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);
+ datalen = strlen (ph->data);
+ buflen = sizeof (*icmp6) + datalen;
+ if (sizeof (buf) < buflen)
+ return (EINVAL);
- buflen = 4096 - sizeof (struct icmp6_hdr);
- strncpy (data, ph->data, buflen);
- datalen = strlen (data);
+ data = buf + ICMP_MINLEN;
+ memcpy (data, ph->data, datalen);
- buflen = datalen + sizeof (struct icmp6_hdr);
+ /* The checksum will be calculated by the TCP/IP stack. */
dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
return (ret);
}
+/*
+ * Set the TOS of a socket protocol independently.
+ *
+ * Using SOL_SOCKET / SO_PRIORITY might be a protocol independent way to
+ * set this. See socket(7) for details.
+ */
+static int ping_set_qos (pingobj_t *obj, pinghost_t *ph, uint8_t qos)
+{
+ int ret = EINVAL;
+ char errbuf[PING_ERRMSG_LEN];
+
+ if (ph->addrfamily == AF_INET)
+ {
+ dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
+ ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
+ &qos, sizeof (qos));
+ if (ret != 0)
+ {
+ ret = errno;
+ ping_set_error (obj, "ping_set_qos",
+ sstrerror (ret, errbuf, sizeof (errbuf)));
+ dprintf ("Setting TP_TOS failed: %s\n", errbuf);
+ }
+ }
+ else if (ph->addrfamily == AF_INET6)
+ {
+ /* IPV6_TCLASS requires an "int". */
+ int tmp = (int) qos;
+
+ dprintf ("Setting IPV6_TCLASS to %#04"PRIx8" (%i)\n", qos, tmp);
+ ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_TCLASS,
+ &tmp, sizeof (tmp));
+ if (ret != 0)
+ {
+ ret = errno;
+ ping_set_error (obj, "ping_set_qos",
+ sstrerror (ret, errbuf, sizeof (errbuf)));
+ dprintf ("Setting IPV6_TCLASS failed: %s\n", errbuf);
+ }
+ }
+
+ return (ret);
+}
+
static int ping_get_ident (void)
{
int fd;
if ((obj = (pingobj_t *) malloc (sizeof (pingobj_t))) == NULL)
return (NULL);
- memset (obj, '\0', sizeof (pingobj_t));
+ 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);
+ obj->qos = 0;
return (obj);
}
if (obj->srcaddr != NULL)
free (obj->srcaddr);
+ if (obj->device != NULL)
+ free (obj->device);
+
free (obj);
return;
switch (option)
{
+ case PING_OPT_QOS:
+ {
+ pinghost_t *ph;
+
+ obj->qos = *((uint8_t *) value);
+ for (ph = obj->head; ph != NULL; ph = ph->next)
+ ping_set_qos (obj, ph, obj->qos);
+ break;
+ }
+
case PING_OPT_TIMEOUT:
obj->timeout = *((double *) value);
if (obj->timeout < 0.0)
} /* case PING_OPT_SOURCE */
break;
+ case PING_OPT_DEVICE:
+ {
+#ifdef SO_BINDTODEVICE
+ char *device = strdup ((char *) value);
+
+ if (device == NULL)
+ {
+ ping_set_errno (obj, errno);
+ ret = -1;
+ break;
+ }
+
+ if (obj->device != NULL)
+ free (obj->device);
+ obj->device = device;
+#else /* ! SO_BINDTODEVICE */
+ ping_set_errno (obj, ENOTSUP);
+ ret = -1;
+#endif /* ! SO_BINDTODEVICE */
+ } /* case PING_OPT_DEVICE */
+ break;
+
+ case PING_OPT_MARK:
+ {
+#ifdef SO_MARK
+ obj->mark = *(int*)(value);
+ obj->set_mark = 1;
+#else /* SO_MARK */
+ ping_set_errno (obj, ENOTSUP);
+ ret = -1;
+#endif /* !SO_MARK */
+
+ } /* case PING_OPT_MARK */
+ break;
+
default:
ret = -2;
} /* switch (option) */
int ping_send (pingobj_t *obj)
{
- int ret;
-
if (obj == NULL)
return (-1);
if (ping_send_all (obj) < 0)
return (-1);
- if ((ret = ping_receive_all (obj)) < 0)
- return (-2);
-
- return (ret);
+ return (ping_receive_all (obj));
}
static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
snprintf (errmsg, PING_ERRMSG_LEN, "Unknown `ai_family': %i", ai_ptr->ai_family);
errmsg[PING_ERRMSG_LEN - 1] = '\0';
- dprintf (errmsg);
+ dprintf ("%s", errmsg);
ping_set_error (obj, "getaddrinfo", errmsg);
continue;
}
ping_set_errno (obj, errno);
continue;
}
+ else if (ph->fd >= FD_SETSIZE)
+ {
+ dprintf("socket(2) returned file descriptor %d, which is above the file "
+ "descriptor limit for select(2) (FD_SETSIZE = %d)\n",
+ ph->fd, FD_SETSIZE);
+ close(ph->fd);
+ ph->fd = -1;
+ ping_set_errno(obj, EMFILE);
+ continue;
+ }
if (obj->srcaddr != NULL)
{
}
}
+#ifdef SO_BINDTODEVICE
+ if (obj->device != NULL)
+ {
+ if (setsockopt (ph->fd, SOL_SOCKET, SO_BINDTODEVICE,
+ obj->device, strlen (obj->device) + 1) != 0)
+ {
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ ping_set_errno (obj, errno);
+ close (ph->fd);
+ ph->fd = -1;
+ continue;
+ }
+ }
+#endif /* SO_BINDTODEVICE */
+#ifdef SO_MARK
+ if(obj->set_mark)
+ {
+ if(setsockopt(ph->fd, SOL_SOCKET, SO_MARK, &(obj->mark), sizeof(obj->mark)) != 0)
+ {
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("setsockopt (SO_MARK): %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ ping_set_errno (obj, errno);
+ close (ph->fd);
+ ph->fd = -1;
+ continue;
+ }
+ }
+#endif
+#ifdef SO_TIMESTAMP
+ if (1) /* {{{ */
+ {
+ int status;
+ int opt = 1;
+
+ status = setsockopt (ph->fd,
+ SOL_SOCKET, SO_TIMESTAMP,
+ &opt, sizeof (opt));
+ if (status != 0)
+ {
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ ping_set_errno (obj, errno);
+ close (ph->fd);
+ ph->fd = -1;
+ continue;
+ }
+ } /* }}} if (1) */
+#endif /* SO_TIMESTAMP */
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);
if (ph->addrfamily == AF_INET)
{
- int opt = 1;
+ int opt;
+
+#ifdef IP_RECVTOS
+ /* Enable receiving the TOS field */
+ opt = 1;
+ setsockopt (ph->fd, IPPROTO_IP, IP_RECVTOS,
+ &opt, sizeof (opt));
+#endif /* IP_RECVTOS */
+ /* Enable receiving the TTL field */
+ opt = 1;
setsockopt (ph->fd, IPPROTO_IP, IP_RECVTTL,
&opt, sizeof (opt));
}
-#if defined(IPPROTO_IPV6) && defined(IPV6_RECVHOPLIMIT)
+#if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
else if (ph->addrfamily == AF_INET6)
{
- int opt = 1;
+ int opt;
+# if defined(IPV6_RECVHOPLIMIT)
+ /* For details see RFC 3542, section 6.3. */
+ opt = 1;
setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVHOPLIMIT,
&opt, sizeof (opt));
+# endif /* IPV6_RECVHOPLIMIT */
+
+# if defined(IPV6_RECVTCLASS)
+ /* For details see RFC 3542, section 6.5. */
+ opt = 1;
+ setsockopt (ph->fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
+ &opt, sizeof (opt));
+# endif /* IPV6_RECVTCLASS */
}
-#endif
+#endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
break;
- }
+ } /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
freeaddrinfo (ai_list);
}
ping_set_ttl (ph, obj->ttl);
+ ping_set_qos (obj, ph, obj->qos);
return (0);
} /* int ping_host_add */
return ((pingobj_iter_t *) iter->next);
}
+int ping_iterator_count (pingobj_t *obj)
+{
+ if (obj == NULL)
+ return 0;
+
+ int count = 0;
+ pingobj_iter_t *iter = obj->head;
+ while(iter) {
+ count++;
+ iter = iter->next;
+ }
+ return count;
+}
+
int ping_iterator_get_info (pingobj_iter_t *iter, int info,
void *buffer, size_t *buffer_len)
{
size_t orig_buffer_len = *buffer_len;
- if ((iter == NULL) || (buffer == NULL) || (buffer_len == NULL))
+ if ((iter == NULL) || (buffer_len == NULL))
+ return (-1);
+
+ if ((buffer == NULL) && (*buffer_len != 0 ))
return (-1);
switch (info)
*((int *) buffer) = iter->recv_ttl;
ret = 0;
break;
+
+ case PING_INFO_RECV_QOS:
+ ret = ENOMEM;
+ if (*buffer_len>sizeof(unsigned)) *buffer_len=sizeof(unsigned);
+ if (!*buffer_len) *buffer_len=1;
+ if (orig_buffer_len < *buffer_len)
+ break;
+ memcpy(buffer,&iter->recv_qos,*buffer_len);
+ ret = 0;
+ break;
}
return (ret);