#endif
#define PING_ERRMSG_LEN 256
+#define PING_TABLE_LEN 5381
struct pinghost
{
struct sockaddr_storage *addr;
socklen_t addrlen;
int addrfamily;
- int fd;
int ident;
int sequence;
struct timeval *timer;
void *context;
struct pinghost *next;
+ struct pinghost *table_next;
};
struct pingobj
uint8_t qos;
char *data;
+ int fd4;
+ int fd6;
+
struct sockaddr *srcaddr;
socklen_t srcaddrlen;
char errmsg[PING_ERRMSG_LEN];
pinghost_t *head;
+ pinghost_t *table[PING_TABLE_LEN];
};
/*
ident = ntohs (icmp_hdr->icmp_id);
seq = ntohs (icmp_hdr->icmp_seq);
- /* We have to iterate over all hosts, since ICMPv4 packets may
- * be received on any raw v4 socket. */
- for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
+ for (ptr = obj->table[ident % PING_TABLE_LEN];
+ ptr != NULL; ptr = ptr->table_next)
{
dprintf ("hostname = %s, ident = 0x%04x, seq = %i\n",
ptr->hostname, ptr->ident, ((ptr->sequence - 1) & 0xFFFF));
return (ptr);
}
-static int ping_receive_one (pingobj_t *obj, const pinghost_t *ph,
- struct timeval *now)
+static int ping_receive_one (pingobj_t *obj, struct timeval *now, int addrfam)
{
- /* Note: 'ph' is not necessarily the host object for which we receive a
- * reply. The right object will be returned by ping_receive_ipv*(). For
- * now, we can only rely on ph->fd and ph->addrfamily. */
-
+ int fd = addrfam == AF_INET6 ? obj->fd6 : obj->fd4;
struct timeval diff, pkt_now = *now;
pinghost_t *host = NULL;
int recv_ttl;
uint8_t recv_qos;
-
+
/*
* Set up the receive buffer..
*/
msghdr.msg_flags |= MSG_XPG4_2;
#endif
- payload_buffer_len = recvmsg (ph->fd, &msghdr, /* flags = */ 0);
+ payload_buffer_len = recvmsg (fd, &msghdr, /* flags = */ 0);
if (payload_buffer_len < 0)
{
#if WITH_DEBUG
#endif
return (-1);
}
- dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, ph->fd);
+ dprintf ("Read %zi bytes from fd = %i\n", payload_buffer_len, fd);
/* Iterate over all auxiliary data in msghdr */
recv_ttl = -1;
memcpy (&pkt_now, CMSG_DATA (cmsg), sizeof (pkt_now));
#endif /* SO_TIMESTAMP */
}
- else if (ph->addrfamily == AF_INET) /* {{{ */
+ else if (addrfam == AF_INET) /* {{{ */
{
if (cmsg->cmsg_level != IPPROTO_IP)
continue;
cmsg->cmsg_type);
}
} /* }}} */
- else if (ph->addrfamily == AF_INET6) /* {{{ */
+ else if (addrfam == AF_INET6) /* {{{ */
{
if (cmsg->cmsg_level != IPPROTO_IPV6)
continue;
}
} /* }}} for (cmsg) */
- if (ph->addrfamily == AF_INET)
+ if (addrfam == AF_INET)
{
host = ping_receive_ipv4 (obj, payload_buffer, payload_buffer_len);
if (host == NULL)
return (-1);
}
- else if (ph->addrfamily == AF_INET6)
+ else if (addrfam == AF_INET6)
{
host = ping_receive_ipv6 (obj, payload_buffer, payload_buffer_len);
if (host == NULL)
else
{
dprintf ("ping_receive_one: Unknown address family %i.\n",
- ph->addrfamily);
+ addrfam);
return (-1);
}
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 read_fds;
- fd_set err_fds;
- int num_fds;
- int max_fd;
-
- 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;
- ptr->recv_ttl = -1;
- }
-
- if (gettimeofday (&nowtime, NULL) == -1)
- {
- ping_set_errno (obj, 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 (&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;
-
- assert (ptr->fd < FD_SETSIZE);
- FD_SET (ptr->fd, &read_fds);
- FD_SET (ptr->fd, &err_fds);
- num_fds++;
-
- if (max_fd < ptr->fd)
- max_fd = ptr->fd;
- }
-
- if (num_fds == 0)
- break;
-
- if (gettimeofday (&nowtime, NULL) == -1)
- {
- ping_set_errno (obj, errno);
- return (-1);
- }
-
- if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
- break;
-
- dprintf ("Waiting on %i sockets for %i.%06i seconds\n", num_fds,
- (int) timeout.tv_sec,
- (int) timeout.tv_usec);
-
- status = select (max_fd + 1, &read_fds, NULL, &err_fds, &timeout);
-
- if (gettimeofday (&nowtime, NULL) == -1)
- {
- ping_set_errno (obj, errno);
- return (-1);
- }
-
- if ((status == -1) && (errno == EINTR))
- {
- dprintf ("select was interrupted by signal..\n");
- ping_set_errno (obj, EINTR);
- return (-EINTR);
- }
- else if (status < 0)
- {
-#if WITH_DEBUG
- char errbuf[PING_ERRMSG_LEN];
- dprintf ("select: %s\n",
- sstrerror (errno, errbuf, sizeof (errbuf)));
-#endif
- break;
- }
- else if (status == 0)
- {
- dprintf ("select timed out\n");
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- if (ptr->latency < 0.0)
- ptr->dropped++;
- break;
- }
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
- {
- 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: *
* *
* `-> ping_send_one_ipv6 *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
static ssize_t ping_sendto (pingobj_t *obj, pinghost_t *ph,
- const void *buf, size_t buflen)
+ const void *buf, size_t buflen, int fd)
{
ssize_t ret;
return (-1);
}
- ret = sendto (ph->fd, buf, buflen, 0,
+ ret = sendto (fd, buf, buflen, 0,
(struct sockaddr *) ph->addr, ph->addrlen);
if (ret < 0)
return (ret);
}
-static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph)
+static int ping_send_one_ipv4 (pingobj_t *obj, pinghost_t *ph, int fd)
{
struct icmp *icmp4;
int status;
dprintf ("Sending ICMPv4 package with ID 0x%04x\n", ph->ident);
- status = ping_sendto (obj, ph, buf, buflen);
+ status = ping_sendto (obj, ph, buf, buflen, fd);
if (status < 0)
{
perror ("ping_sendto");
return (0);
}
-static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph)
+static int ping_send_one_ipv6 (pingobj_t *obj, pinghost_t *ph, int fd)
{
struct icmp6_hdr *icmp6;
int status;
dprintf ("Sending ICMPv6 package with ID 0x%04x\n", ph->ident);
- status = ping_sendto (obj, ph, buf, buflen);
+ status = ping_sendto (obj, ph, buf, buflen, fd);
if (status < 0)
{
perror ("ping_sendto");
return (0);
}
-static int ping_send_all (pingobj_t *obj)
+static int ping_send_one (pingobj_t *obj, pinghost_t *ptr, int fd)
{
- pinghost_t *ph;
- pinghost_t *ptr;
-
- int ret;
-
- ret = 0;
- ph = obj->head;
-
- for (ptr = ph; ptr != NULL; ptr = ptr->next)
+ if (gettimeofday (ptr->timer, NULL) == -1)
{
/* start timer.. The GNU `ping6' starts the timer before
* sending the packet, so I will do that too */
- if (gettimeofday (ptr->timer, NULL) == -1)
- {
#if WITH_DEBUG
- char errbuf[PING_ERRMSG_LEN];
- dprintf ("gettimeofday: %s\n",
- sstrerror (errno, errbuf, sizeof (errbuf)));
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("gettimeofday: %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
#endif
- timerclear (ptr->timer);
- ret--;
- continue;
- }
- else
- {
- dprintf ("timer set for hostname = %s\n", ptr->hostname);
- }
+ timerclear (ptr->timer);
+ return (-1);
+ }
+ 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)
+ if (ptr->addrfamily == AF_INET6)
+ {
+ dprintf ("Sending ICMPv6 echo request to `%s'\n", ptr->hostname);
+ if (ping_send_one_ipv6 (obj, ptr, fd) != 0)
{
- dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
- if (ping_send_one_ipv4 (obj, ptr) != 0)
- {
- timerclear (ptr->timer);
- ret--;
- continue;
- }
+ timerclear (ptr->timer);
+ return (-1);
}
- else /* this should not happen */
+ }
+ else if (ptr->addrfamily == AF_INET)
+ {
+ dprintf ("Sending ICMPv4 echo request to `%s'\n", ptr->hostname);
+ if (ping_send_one_ipv4 (obj, ptr, fd) != 0)
{
- dprintf ("Unknown address family: %i\n", ptr->addrfamily);
timerclear (ptr->timer);
- ret--;
- continue;
+ return (-1);
}
-
- ptr->sequence++;
+ }
+ else /* this should not happen */
+ {
+ dprintf ("Unknown address family: %i\n", ptr->addrfamily);
+ timerclear (ptr->timer);
+ return (-1);
}
- return (ret);
+ ptr->sequence++;
+
+ return (0);
}
/*
* Set the TTL of a socket protocol independently.
*/
-static int ping_set_ttl (pinghost_t *ph, int ttl)
+static int ping_set_ttl (pingobj_t *obj, int ttl)
{
- int ret = -2;
+ int ret = 0;
+ char errbuf[PING_ERRMSG_LEN];
- if (ph->addrfamily == AF_INET)
+ if (obj->fd4 != -1)
{
- dprintf ("Setting TTLv4 to %i\n", ttl);
- ret = setsockopt (ph->fd, IPPROTO_IP, IP_TTL,
- &ttl, sizeof (ttl));
+ if (setsockopt (obj->fd4, IPPROTO_IP, IP_TTL,
+ &ttl, sizeof (ttl)))
+ {
+ ret = errno;
+ ping_set_error (obj, "ping_set_ttl",
+ sstrerror (ret, errbuf, sizeof (errbuf)));
+ dprintf ("Setting TTLv4 failed: %s\n", errbuf);
+ }
}
- else if (ph->addrfamily == AF_INET6)
+
+ if (obj->fd6 != -1)
{
dprintf ("Setting TTLv6 to %i\n", ttl);
- ret = setsockopt (ph->fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
- &ttl, sizeof (ttl));
+ if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_UNICAST_HOPS,
+ &ttl, sizeof (ttl)))
+ {
+ ret = errno;
+ ping_set_error (obj, "ping_set_ttl",
+ sstrerror (ret, errbuf, sizeof (errbuf)));
+ dprintf ("Setting TTLv6 failed: %s\n", errbuf);
+ }
}
return (ret);
* 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)
+static int ping_set_qos (pingobj_t *obj, uint8_t qos)
{
- int ret = EINVAL;
+ int ret = 0;
char errbuf[PING_ERRMSG_LEN];
- if (ph->addrfamily == AF_INET)
+ if (obj->fd4 != -1)
{
dprintf ("Setting TP_TOS to %#04"PRIx8"\n", qos);
- ret = setsockopt (ph->fd, IPPROTO_IP, IP_TOS,
- &qos, sizeof (qos));
- if (ret != 0)
+ if (setsockopt (obj->fd4, IPPROTO_IP, IP_TOS,
+ &qos, sizeof (qos)))
{
ret = errno;
ping_set_error (obj, "ping_set_qos",
dprintf ("Setting TP_TOS failed: %s\n", errbuf);
}
}
- else if (ph->addrfamily == AF_INET6)
+
+ if (obj->fd6 != -1)
{
/* 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)
+ if (setsockopt (obj->fd6, IPPROTO_IPV6, IPV6_TCLASS,
+ &tmp, sizeof (tmp)))
{
ret = errno;
ping_set_error (obj, "ping_set_qos",
retval = (int) random ();
dprintf ("Random number: %#x\n", retval);
-
+
return (retval);
}
ph->addr = (struct sockaddr_storage *) (ph->timer + 1);
ph->addrlen = sizeof (struct sockaddr_storage);
- ph->fd = -1;
ph->latency = -1.0;
ph->dropped = 0;
ph->ident = ping_get_ident () & 0xFFFF;
static void ping_free (pinghost_t *ph)
{
- if (ph->fd >= 0)
- close (ph->fd);
-
if (ph->username != NULL)
free (ph->username);
free (ph);
}
+/* ping_open_socket opens, initializes and returns a new raw socket to use for
+ * ICMPv4 or ICMPv6 packets. addrfam must be either AF_INET or AF_INET6. On
+ * error, -1 is returned and obj->errmsg is set appropriately. */
+static int ping_open_socket(pingobj_t *obj, int addrfam)
+{
+ int fd;
+ if (addrfam == AF_INET6)
+ {
+ fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMPV6);
+ }
+ else if (addrfam == AF_INET)
+ {
+ fd = socket(addrfam, SOCK_RAW, IPPROTO_ICMP);
+ }
+ else /* this should not happen */
+ {
+ ping_set_error (obj, "ping_open_socket", "Unknown address family");
+ dprintf ("Unknown address family: %i\n", addrfam);
+ return -1;
+ }
+
+ if (fd == -1)
+ {
+ ping_set_errno (obj, errno);
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("socket: %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ return -1;
+ }
+ else if (fd >= FD_SETSIZE)
+ {
+ ping_set_errno (obj, EMFILE);
+ dprintf ("socket(2) returned file descriptor %d, which is above the file "
+ "descriptor limit for select(2) (FD_SETSIZE = %d)\n",
+ fd, FD_SETSIZE);
+ close (fd);
+ return -1;
+ }
+
+ if (obj->srcaddr != NULL)
+ {
+ assert (obj->srcaddrlen > 0);
+ assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
+
+ if (bind (fd, obj->srcaddr, obj->srcaddrlen) == -1)
+ {
+ ping_set_errno (obj, errno);
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("bind: %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ close (fd);
+ return -1;
+ }
+ }
+
+#ifdef SO_BINDTODEVICE
+ if (obj->device != NULL)
+ {
+ if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
+ obj->device, strlen (obj->device) + 1) != 0)
+ {
+ ping_set_errno (obj, errno);
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("setsockopt (SO_BINDTODEVICE): %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ close (fd);
+ return -1;
+ }
+ }
+#endif /* SO_BINDTODEVICE */
+#ifdef SO_MARK
+ if (obj->set_mark)
+ {
+ if (setsockopt(fd, SOL_SOCKET, SO_MARK,
+ &obj->mark, sizeof(obj->mark)) != 0)
+ {
+ ping_set_errno (obj, errno);
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("setsockopt (SO_MARK): %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ close (fd);
+ return -1;
+ }
+ }
+#endif
+#ifdef SO_TIMESTAMP
+ if (1) /* {{{ */
+ {
+ int status;
+ int opt = 1;
+
+ status = setsockopt (fd,
+ SOL_SOCKET, SO_TIMESTAMP,
+ &opt, sizeof (opt));
+ if (status != 0)
+ {
+ ping_set_errno (obj, errno);
+#if WITH_DEBUG
+ char errbuf[PING_ERRMSG_LEN];
+ dprintf ("setsockopt (SO_TIMESTAMP): %s\n",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+#endif
+ close (fd);
+ return -1;
+ }
+ } /* }}} if (1) */
+#endif /* SO_TIMESTAMP */
+
+ if (addrfam == AF_INET)
+ {
+ int opt;
+
+#ifdef IP_RECVTOS
+ /* Enable receiving the TOS field */
+ opt = 1;
+ setsockopt (fd, IPPROTO_IP, IP_RECVTOS,
+ &opt, sizeof (opt));
+#endif /* IP_RECVTOS */
+
+ /* Enable receiving the TTL field */
+ opt = 1;
+ setsockopt (fd, IPPROTO_IP, IP_RECVTTL,
+ &opt, sizeof (opt));
+ }
+#if defined(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
+ else if (addrfam == AF_INET6)
+ {
+ int opt;
+
+# if defined(IPV6_RECVHOPLIMIT)
+ /* For details see RFC 3542, section 6.3. */
+ opt = 1;
+ setsockopt (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 (fd, IPPROTO_IPV6, IPV6_RECVTCLASS,
+ &opt, sizeof (opt));
+# endif /* IPV6_RECVTCLASS */
+ }
+#endif /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
+
+ return fd;
+}
+
/*
* public methods
*/
obj->addrfamily = PING_DEF_AF;
obj->data = strdup (PING_DEF_DATA);
obj->qos = 0;
+ obj->fd4 = -1;
+ obj->fd6 = -1;
return (obj);
}
if (obj->device != NULL)
free (obj->device);
+ if (obj->fd4 != -1)
+ close(obj->fd4);
+
+ if (obj->fd6 != -1)
+ close(obj->fd6);
+
free (obj);
return;
{
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);
+ ret = ping_set_qos (obj, obj->qos);
break;
}
break;
case PING_OPT_TTL:
- obj->ttl = *((int *) value);
- if ((obj->ttl < 1) || (obj->ttl > 255))
+ ret = *((int *) value);
+ if ((ret < 1) || (ret > 255))
{
obj->ttl = PING_DEF_TTL;
ret = -1;
}
else
{
- pinghost_t *ph;
-
- for (ph = obj->head; ph != NULL; ph = ph->next)
- ping_set_ttl (ph, obj->ttl);
+ obj->ttl = ret;
+ ret = ping_set_ttl (obj, obj->ttl);
}
break;
ping_set_errno (obj, ENOTSUP);
ret = -1;
#endif /* !SO_MARK */
-
+
} /* case PING_OPT_MARK */
break;
return (ret);
} /* int ping_setopt */
-
int ping_send (pingobj_t *obj)
{
- if (obj == NULL)
+ pinghost_t *ptr;
+
+ struct timeval endtime;
+ struct timeval nowtime;
+ struct timeval timeout;
+
+ _Bool need_ipv4_socket = 0;
+ _Bool need_ipv6_socket = 0;
+
+ for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
+ {
+ ptr->latency = -1.0;
+ ptr->recv_ttl = -1;
+
+ if (ptr->addrfamily == AF_INET)
+ need_ipv4_socket = 1;
+ else if (ptr->addrfamily == AF_INET6)
+ need_ipv6_socket = 1;
+ }
+
+ if (!need_ipv4_socket && !need_ipv6_socket)
+ {
+ ping_set_error (obj, "ping_send", "No hosts to ping");
return (-1);
+ }
+
+ if (need_ipv4_socket && obj->fd4 == -1)
+ {
+ obj->fd4 = ping_open_socket(obj, AF_INET);
+ if (obj->fd4 == -1)
+ return (-1);
+ ping_set_ttl (obj, obj->ttl);
+ ping_set_qos (obj, obj->qos);
+ }
+ if (need_ipv6_socket && obj->fd6 == -1)
+ {
+ obj->fd6 = ping_open_socket(obj, AF_INET6);
+ if (obj->fd6 == -1)
+ return (-1);
+ ping_set_ttl (obj, obj->ttl);
+ ping_set_qos (obj, obj->qos);
+ }
- if (ping_send_all (obj) < 0)
+ if (gettimeofday (&nowtime, NULL) == -1)
+ {
+ ping_set_errno (obj, errno);
return (-1);
+ }
- return (ping_receive_all (obj));
-}
+ /* 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);
+
+ /* host_to_ping points to the host to which to send the next ping. The
+ * pointer is advanced to the next host in the linked list after the
+ * ping has been sent. If host_to_ping is NULL, no more pings need to be
+ * send out. */
+ pinghost_t *host_to_ping = obj->head;
+
+ /* pings_in_flight is the number of hosts we sent a "ping" to but didn't
+ * receive a "pong" yet. */
+ int pings_in_flight = 0;
+
+ /* pongs_received is the number of echo replies received. Unless there
+ * is an error, this is used as the return value of ping_send(). */
+ int pongs_received = 0;
+
+ int error_count = 0;
+
+ while (pings_in_flight > 0 || host_to_ping != NULL)
+ {
+ fd_set read_fds;
+ fd_set write_fds;
+
+ int write_fd = -1;
+ int max_fd = -1;
+
+ FD_ZERO (&read_fds);
+ FD_ZERO (&write_fds);
+
+ if (obj->fd4 != -1)
+ {
+ FD_SET(obj->fd4, &read_fds);
+ if (host_to_ping != NULL && host_to_ping->addrfamily == AF_INET)
+ write_fd = obj->fd4;
+
+ if (max_fd < obj->fd4)
+ max_fd = obj->fd4;
+ }
+
+ if (obj->fd6 != -1)
+ {
+ FD_SET(obj->fd6, &read_fds);
+ if (host_to_ping != NULL && host_to_ping->addrfamily == AF_INET6)
+ write_fd = obj->fd6;
+
+ if (max_fd < obj->fd6)
+ max_fd = obj->fd6;
+ }
+
+ if (write_fd != -1)
+ FD_SET(write_fd, &write_fds);
+
+ assert (max_fd != -1);
+ assert (max_fd < FD_SETSIZE);
+
+ if (gettimeofday (&nowtime, NULL) == -1)
+ {
+ ping_set_errno (obj, errno);
+ return (-1);
+ }
+
+ if (ping_timeval_sub (&endtime, &nowtime, &timeout) == -1)
+ break;
+
+ dprintf ("Waiting on %i sockets for %u.%06u seconds\n",
+ ((obj->fd4 != -1) ? 1 : 0) + ((obj->fd6 != -1) ? 1 : 0),
+ (unsigned) timeout.tv_sec,
+ (unsigned) timeout.tv_usec);
+
+ int status = select (max_fd + 1, &read_fds, &write_fds, NULL, &timeout);
+
+ if (gettimeofday (&nowtime, NULL) == -1)
+ {
+ ping_set_errno (obj, errno);
+ return (-1);
+ }
+
+ if (status == -1)
+ {
+ ping_set_errno (obj, errno);
+ dprintf ("select: %s\n", obj->errmsg);
+ return (-1);
+ }
+ else if (status == 0)
+ {
+ dprintf ("select timed out\n");
+
+ pinghost_t *ph;
+ for (ph = obj->head; ph != NULL; ph = ph->next)
+ if (ph->latency < 0.0)
+ ph->dropped++;
+ break;
+ }
+
+ /* first, check if we can receive a reply ... */
+ if (obj->fd6 != -1 && FD_ISSET (obj->fd6, &read_fds))
+ {
+ if (ping_receive_one (obj, &nowtime, AF_INET6) == 0)
+ {
+ pings_in_flight--;
+ pongs_received++;
+ }
+ continue;
+ }
+ if (obj->fd4 != -1 && FD_ISSET (obj->fd4, &read_fds))
+ {
+ if (ping_receive_one (obj, &nowtime, AF_INET) == 0)
+ {
+ pings_in_flight--;
+ pongs_received++;
+ }
+ continue;
+ }
+
+ /* ... and if no reply is available to read, continue sending
+ * out pings. */
+
+ /* this condition should always be true. We keep it for
+ * consistency with the read blocks above and just to be on the
+ * safe side. */
+ if (write_fd != -1 && FD_ISSET (write_fd, &write_fds))
+ {
+ if (ping_send_one (obj, host_to_ping, write_fd) == 0)
+ pings_in_flight++;
+ else
+ error_count++;
+ host_to_ping = host_to_ping->next;
+ continue;
+ }
+ } /* while (1) */
+
+ if (error_count)
+ return (-1 * error_count);
+ return (pongs_received);
+} /* int ping_send */
static pinghost_t *ping_host_search (pinghost_t *ph, const char *host)
{
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;
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)
- {
-#if WITH_DEBUG
- char errbuf[PING_ERRMSG_LEN];
- dprintf ("socket: %s\n",
- sstrerror (errno, errbuf, sizeof (errbuf)));
-#endif
- 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)
- {
- assert (obj->srcaddrlen > 0);
- assert (obj->srcaddrlen <= sizeof (struct sockaddr_storage));
-
- if (bind (ph->fd, obj->srcaddr, obj->srcaddrlen) == -1)
- {
-#if WITH_DEBUG
- char errbuf[PING_ERRMSG_LEN];
- dprintf ("bind: %s\n",
- sstrerror (errno, errbuf, sizeof (errbuf)));
-#endif
- ping_set_errno (obj, errno);
- close (ph->fd);
- ph->fd = -1;
- continue;
- }
- }
-
-#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);
}
}
#endif /* AI_CANONNAME */
-
- if (ph->addrfamily == AF_INET)
- {
- 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(IPV6_RECVHOPLIMIT) || defined(IPV6_RECVTCLASS)
- else if (ph->addrfamily == AF_INET6)
- {
- 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 /* IPV6_RECVHOPLIMIT || IPV6_RECVTCLASS */
-
- break;
} /* for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) */
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
hptr->next = ph;
}
- ping_set_ttl (ph, obj->ttl);
- ping_set_qos (obj, ph, obj->qos);
+ ph->table_next = obj->table[ph->ident % PING_TABLE_LEN];
+ obj->table[ph->ident % PING_TABLE_LEN] = ph;
return (0);
} /* int ping_host_add */
int ping_host_remove (pingobj_t *obj, const char *host)
{
- pinghost_t *pre, *cur;
+ pinghost_t *pre, *cur, *target;
if ((obj == NULL) || (host == NULL))
return (-1);
obj->head = cur->next;
else
pre->next = cur->next;
-
+
+ target = cur;
+ pre = NULL;
+
+ cur = obj->table[target->ident % PING_TABLE_LEN];
+
+ while (cur != NULL)
+ {
+ if (cur == target)
+ break;
+
+ pre = cur;
+ cur = cur->table_next;
+ }
+
+ if (cur == NULL)
+ {
+ ping_set_error(obj, "ping_host_remove", "Host not found (T)");
+ ping_free(target);
+ return (-1);
+ }
+
+ if (pre == NULL)
+ obj->table[target->ident % PING_TABLE_LEN] = cur->table_next;
+ else
+ pre->table_next = cur->table_next;
+
ping_free (cur);
return (0);
projects / liboping.git / commitdiff