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Diffstat (limited to 'bgpd/bgp_network.c')
-rw-r--r--bgpd/bgp_network.c190
1 files changed, 101 insertions, 89 deletions
diff --git a/bgpd/bgp_network.c b/bgpd/bgp_network.c
index 77847008..ade0fbc6 100644
--- a/bgpd/bgp_network.c
+++ b/bgpd/bgp_network.c
@@ -39,6 +39,13 @@ Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
extern struct zebra_privs_t bgpd_privs;
+/* BGP listening socket. */
+struct bgp_listener
+{
+ int fd;
+ union sockunion su;
+ struct thread *thread;
+};
/*
* Set MD5 key for the socket, for the given IPv4 peer address.
@@ -365,37 +372,90 @@ bgp_getsockname (struct peer *peer)
bgp_nexthop_set (peer->su_local, peer->su_remote, &peer->nexthop, peer);
}
+
+static int
+bgp_listener (int sock, struct sockaddr *sa, socklen_t salen)
+{
+ struct bgp_listener *listener;
+ int ret, en;
+
+ sockopt_reuseaddr (sock);
+ sockopt_reuseport (sock);
+
+#ifdef IPTOS_PREC_INTERNETCONTROL
+ if (sa->sa_family == AF_INET)
+ setsockopt_ipv4_tos (sock, IPTOS_PREC_INTERNETCONTROL);
+#endif
+
+#ifdef IPV6_V6ONLY
+ /* Want only IPV6 on ipv6 socket (not mapped addresses) */
+ if (sa->sa_family == AF_INET6) {
+ int on = 1;
+ setsockopt (sock, IPPROTO_IPV6, IPV6_V6ONLY,
+ (void *) &on, sizeof (on));
+ }
+#endif
+
+ if (bgpd_privs.change (ZPRIVS_RAISE) )
+ zlog_err ("bgp_socket: could not raise privs");
+
+ ret = bind (sock, sa, salen);
+ en = errno;
+ if (bgpd_privs.change (ZPRIVS_LOWER) )
+ zlog_err ("bgp_bind_address: could not lower privs");
+
+ if (ret < 0)
+ {
+ zlog_err ("bind: %s", safe_strerror (en));
+ return ret;
+ }
+
+ ret = listen (sock, 3);
+ if (ret < 0)
+ {
+ zlog_err ("listen: %s", safe_strerror (errno));
+ return ret;
+ }
+
+ listener = XMALLOC (MTYPE_BGP_LISTENER, sizeof(*listener));
+ listener->fd = sock;
+ memcpy(&listener->su, sa, salen);
+ listener->thread = thread_add_read (master, bgp_accept, listener, sock);
+ listnode_add (bm->listen_sockets, listener);
+
+ return 0;
+}
+
/* IPv6 supported version of BGP server socket setup. */
#if defined (HAVE_IPV6) && ! defined (NRL)
int
-bgp_socket (struct bgp *bgp, unsigned short port, char *address)
+bgp_socket (unsigned short port, const char *address)
{
- int ret, en;
- struct addrinfo req;
struct addrinfo *ainfo;
struct addrinfo *ainfo_save;
- int sock = 0;
+ static const struct addrinfo req = {
+ .ai_family = AF_UNSPEC,
+ .ai_flags = AI_PASSIVE,
+ .ai_socktype = SOCK_STREAM,
+ };
+ int ret, count;
char port_str[BUFSIZ];
- memset (&req, 0, sizeof (struct addrinfo));
-
- req.ai_flags = AI_PASSIVE;
- req.ai_family = AF_UNSPEC;
- req.ai_socktype = SOCK_STREAM;
snprintf (port_str, sizeof(port_str), "%d", port);
port_str[sizeof (port_str) - 1] = '\0';
- ret = getaddrinfo (address, port_str, &req, &ainfo);
+ ret = getaddrinfo (address, port_str, &req, &ainfo_save);
if (ret != 0)
{
zlog_err ("getaddrinfo: %s", gai_strerror (ret));
return -1;
}
- ainfo_save = ainfo;
-
- do
+ count = 0;
+ for (ainfo = ainfo_save; ainfo; ainfo = ainfo->ai_next)
{
+ int sock;
+
if (ainfo->ai_family != AF_INET && ainfo->ai_family != AF_INET6)
continue;
@@ -406,59 +466,25 @@ bgp_socket (struct bgp *bgp, unsigned short port, char *address)
continue;
}
- sockopt_reuseaddr (sock);
- sockopt_reuseport (sock);
-
-#ifdef IPTOS_PREC_INTERNETCONTROL
- if (ainfo->ai_family == AF_INET)
- setsockopt_ipv4_tos (sock, IPTOS_PREC_INTERNETCONTROL);
-#endif
-
-#ifdef IPV6_V6ONLY
- /* Want only IPV6 on ipv6 socket (not mapped addresses) */
- if (ainfo->ai_family == AF_INET6) {
- int on = 1;
- setsockopt (sock, IPPROTO_IPV6, IPV6_V6ONLY,
- (void *) &on, sizeof (on));
- }
-#endif
-
- if (bgpd_privs.change (ZPRIVS_RAISE) )
- zlog_err ("bgp_socket: could not raise privs");
-
- ret = bind (sock, ainfo->ai_addr, ainfo->ai_addrlen);
- en = errno;
- if (bgpd_privs.change (ZPRIVS_LOWER) )
- zlog_err ("bgp_bind_address: could not lower privs");
-
- if (ret < 0)
- {
- zlog_err ("bind: %s", safe_strerror (en));
- close(sock);
- continue;
- }
-
- ret = listen (sock, 3);
- if (ret < 0)
- {
- zlog_err ("listen: %s", safe_strerror (errno));
- close (sock);
- continue;
- }
-
- listnode_add (bm->listen_sockets, (void *)(long)sock);
- thread_add_read (master, bgp_accept, bgp, sock);
+ ret = bgp_listener (sock, ainfo->ai_addr, ainfo->ai_addrlen);
+ if (ret == 0)
+ ++count;
+ else
+ close(sock);
}
- while ((ainfo = ainfo->ai_next) != NULL);
-
freeaddrinfo (ainfo_save);
+ if (count == 0)
+ {
+ zlog_err ("%s: no usable addresses", __func__);
+ return -1;
+ }
- return sock;
+ return 0;
}
#else
/* Traditional IPv4 only version. */
int
-bgp_socket (struct bgp *bgp, unsigned short port, char *address)
+bgp_socket (unsigned short port, const char *address)
{
int sock;
int socklen;
@@ -472,15 +498,7 @@ bgp_socket (struct bgp *bgp, unsigned short port, char *address)
return sock;
}
- sockopt_reuseaddr (sock);
- sockopt_reuseport (sock);
-
-#ifdef IPTOS_PREC_INTERNETCONTROL
- setsockopt_ipv4_tos (sock, IPTOS_PREC_INTERNETCONTROL);
-#endif
-
memset (&sin, 0, sizeof (struct sockaddr_in));
-
sin.sin_family = AF_INET;
sin.sin_port = htons (port);
socklen = sizeof (struct sockaddr_in);
@@ -495,33 +513,27 @@ bgp_socket (struct bgp *bgp, unsigned short port, char *address)
sin.sin_len = socklen;
#endif /* HAVE_STRUCT_SOCKADDR_IN_SIN_LEN */
- if ( bgpd_privs.change (ZPRIVS_RAISE) )
- zlog_err ("bgp_socket: could not raise privs");
-
- ret = bind (sock, (struct sockaddr *) &sin, socklen);
- en = errno;
-
- if (bgpd_privs.change (ZPRIVS_LOWER) )
- zlog_err ("bgp_socket: could not lower privs");
-
- if (ret < 0)
- {
- zlog_err ("bind: %s", safe_strerror (en));
- close (sock);
- return ret;
- }
-
- ret = listen (sock, 3);
+ ret = bgp_listener (sock, (struct sockaddr *) &sin, socklen);
if (ret < 0)
{
- zlog_err ("listen: %s", safe_strerror (errno));
close (sock);
return ret;
}
-
- listnode_add (bm->listen_sockets, (void *)(long)sock);
- thread_add_read (bm->master, bgp_accept, bgp, sock);
-
return sock;
}
#endif /* HAVE_IPV6 && !NRL */
+
+void
+bgp_close (void)
+{
+ struct listnode *node, *next;
+ struct bgp_listener *listener;
+
+ for (ALL_LIST_ELEMENTS (bm->listen_sockets, node, next, listener))
+ {
+ thread_cancel (listener->thread);
+ close (listener->fd);
+ listnode_delete (bm->listen_sockets, listener);
+ XFREE (MTYPE_BGP_LISTENER, listener);
+ }
+}
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