#if HAVE_POLL_H
# include <poll.h>
#endif
+#if HAVE_NET_IF_H
+# include <net/if.h>
+#endif
#if HAVE_LIBGCRYPT
# include <gcrypt.h>
char *node;
char *service;
+ int interface;
union
{
return (0);
} /* int network_set_ttl */
-static int network_bind_socket (int fd, const struct addrinfo *ai)
+static int network_set_interface (const sockent_t *se, const struct addrinfo *ai) /* {{{ */
+{
+ DEBUG ("network plugin: network_set_interface: interface index = %i;",
+ se->interface);
+
+ assert (se->type == SOCKENT_TYPE_CLIENT);
+
+ if (ai->ai_family == AF_INET)
+ {
+ struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
+
+ if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
+ {
+#if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
+ /* If possible, use the "ip_mreqn" structure which has
+ * an "interface index" member. Using the interface
+ * index is preferred here, because of its similarity
+ * to the way IPv6 handles this. Unfortunately, it
+ * appears not to be portable. */
+ struct ip_mreqn mreq;
+
+ memset (&mreq, 0, sizeof (mreq));
+ mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
+ mreq.imr_address.s_addr = ntohl (INADDR_ANY);
+ mreq.imr_ifindex = se->interface;
+#else
+ struct ip_mreq mreq;
+
+ memset (&mreq, 0, sizeof (mreq));
+ mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
+ mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
+#endif
+
+ if (setsockopt (se->data.client.fd, IPPROTO_IP, IP_MULTICAST_IF,
+ &mreq, sizeof (mreq)) != 0)
+ {
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+
+ return (0);
+ }
+ }
+ else if (ai->ai_family == AF_INET6)
+ {
+ struct sockaddr_in6 *addr = (struct sockaddr_in6 *) ai->ai_addr;
+
+ if (IN6_IS_ADDR_MULTICAST (&addr->sin6_addr))
+ {
+ if (setsockopt (se->data.client.fd, IPPROTO_IPV6, IPV6_MULTICAST_IF,
+ &se->interface,
+ sizeof (se->interface)) != 0)
+ {
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ return (-1);
+ }
+
+ return (0);
+ }
+ }
+
+ /* else: Not a multicast interface. */
+#if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
+ if (se->interface != 0)
+ {
+ char interface_name[IFNAMSIZ];
+
+ if (if_indextoname (se->interface, interface_name) == NULL)
+ return (-1);
+
+ DEBUG ("network plugin: Binding socket to interface %s", interface_name);
+
+ if (setsockopt (se->data.client.fd, SOL_SOCKET, SO_BINDTODEVICE,
+ interface_name,
+ sizeof(interface_name)) == -1 )
+ {
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+ }
+/* #endif HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
+
+#else
+ WARNING ("network plugin: Cannot set the interface on a unicast "
+ "socket because "
+# if !defined(SO_BINDTODEVICE)
+ "the the \"SO_BINDTODEVICE\" socket option "
+# else
+ "the \"if_indextoname\" function "
+# endif
+ "is not available on your system.");
+#endif
+
+ return (0);
+} /* }}} network_set_interface */
+
+static int network_bind_socket (int fd, const struct addrinfo *ai, const int interface_idx)
{
int loop = 0;
int yes = 1;
struct sockaddr_in *addr = (struct sockaddr_in *) ai->ai_addr;
if (IN_MULTICAST (ntohl (addr->sin_addr.s_addr)))
{
+#if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
+ struct ip_mreqn mreq;
+#else
struct ip_mreq mreq;
+#endif
DEBUG ("fd = %i; IPv4 multicast address found", fd);
mreq.imr_multiaddr.s_addr = addr->sin_addr.s_addr;
- mreq.imr_interface.s_addr = htonl (INADDR_ANY);
+#if HAVE_STRUCT_IP_MREQN_IMR_IFINDEX
+ /* Set the interface using the interface index if
+ * possible (available). Unfortunately, the struct
+ * ip_mreqn is not portable. */
+ mreq.imr_address.s_addr = ntohl (INADDR_ANY);
+ mreq.imr_ifindex = interface_idx;
+#else
+ mreq.imr_interface.s_addr = ntohl (INADDR_ANY);
+#endif
if (setsockopt (fd, IPPROTO_IP, IP_MULTICAST_LOOP,
&loop, sizeof (loop)) == -1)
sizeof (errbuf)));
return (-1);
}
+
+ return (0);
}
}
else if (ai->ai_family == AF_INET6)
* single interface; programs running on
* multihomed hosts may need to join the same
* group on more than one interface.*/
- mreq.ipv6mr_interface = 0;
+ mreq.ipv6mr_interface = interface_idx;
if (setsockopt (fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP,
&loop, sizeof (loop)) == -1)
sizeof (errbuf)));
return (-1);
}
+
+ return (0);
+ }
+ }
+
+#if defined(HAVE_IF_INDEXTONAME) && HAVE_IF_INDEXTONAME && defined(SO_BINDTODEVICE)
+ /* if a specific interface was set, bind the socket to it. But to avoid
+ * possible problems with multicast routing, only do that for non-multicast
+ * addresses */
+ if (interface_idx != 0)
+ {
+ char interface_name[IFNAMSIZ];
+
+ if (if_indextoname (interface_idx, interface_name) == NULL)
+ return (-1);
+
+ DEBUG ("fd = %i; Binding socket to interface %s", fd, interface_name);
+
+ if (setsockopt (fd, SOL_SOCKET, SO_BINDTODEVICE,
+ interface_name,
+ sizeof(interface_name)) == -1 )
+ {
+ char errbuf[1024];
+ ERROR ("setsockopt: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
}
}
+#endif /* HAVE_IF_INDEXTONAME && SO_BINDTODEVICE */
return (0);
} /* int network_bind_socket */
se->type = SOCKENT_TYPE_CLIENT;
se->node = NULL;
se->service = NULL;
+ se->interface = 0;
se->next = NULL;
if (type == SOCKENT_TYPE_SERVER)
continue;
}
- status = network_bind_socket (*tmp, ai_ptr);
+ status = network_bind_socket (*tmp, ai_ptr, se->interface);
if (status != 0)
{
close (*tmp);
se->data.client.addrlen = ai_ptr->ai_addrlen;
network_set_ttl (se, ai_ptr);
+ network_set_interface (se, ai_ptr);
/* We don't open more than one write-socket per
* node/service pair.. */
return (0);
} /* }}} int network_config_set_ttl */
+static int network_config_set_interface (const oconfig_item_t *ci, /* {{{ */
+ int *interface)
+{
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("network plugin: The `Interface' config option needs exactly "
+ "one string argument.");
+ return (-1);
+ }
+
+ if (interface == NULL)
+ return (-1);
+
+ *interface = if_nametoindex (ci->values[0].value.string);
+
+ return (0);
+} /* }}} int network_config_set_interface */
+
static int network_config_set_buffer_size (const oconfig_item_t *ci) /* {{{ */
{
int tmp;
&se->data.server.security_level);
else
#endif /* HAVE_LIBGCRYPT */
+ if (strcasecmp ("Interface", child->key) == 0)
+ network_config_set_interface (child,
+ &se->interface);
+ else
{
WARNING ("network plugin: Option `%s' is not allowed here.",
child->key);
&se->data.client.security_level);
else
#endif /* HAVE_LIBGCRYPT */
+ if (strcasecmp ("Interface", child->key) == 0)
+ network_config_set_interface (child,
+ &se->interface);
+ else
{
WARNING ("network plugin: Option `%s' is not allowed here.",
child->key);
projects / collectd.git / blobdiff