* nor RFC2385 (which requires a kernel patch on 2.4 kernels).
*/
-char const *cvs_id_bgp = "$Id: bgp.c,v 1.9 2004/12/16 08:49:52 bodea Exp $";
+char const *cvs_id_bgp = "$Id: bgp.c,v 1.12 2005/09/02 23:39:36 bodea Exp $";
#include <stdlib.h>
#include <unistd.h>
static void bgp_clear(struct bgp_peer *peer);
static void bgp_set_retry(struct bgp_peer *peer);
-static void bgp_cidr(in_addr_t ip, in_addr_t mask, struct bgp_ip_prefix *pfx);
+static void bgp_cidr(in_addr_t ip, int prefixlen, struct bgp_ip_prefix *pfx);
static struct bgp_route_list *bgp_insert_route(struct bgp_route_list *head,
struct bgp_route_list *new);
return 0;
}
+
+ peer->edata.type = FD_TYPE_BGP;
+ peer->edata.index = i;
+ peer->events = 0;
}
if (as < 1)
peer->inbuf->done = 0;
peer->cli_flag = 0;
+ peer->events = 0;
if (peer->state != peer->next_state)
{
bgp_halt(peer); /* give up */
}
-/* convert ip/mask to CIDR notation */
-static void bgp_cidr(in_addr_t ip, in_addr_t mask, struct bgp_ip_prefix *pfx)
-{
- int i;
- uint32_t b;
-
- /* convert to prefix notation */
- pfx->len = 32;
- pfx->prefix = ip;
-
- if (!mask) /* bogus */
- mask = 0xffffffff;
-
- for (i = 0; i < 32 && ((b = ntohl(1 << i)), !(mask & b)); i++)
- {
- pfx->len--;
- pfx->prefix &= ~b;
- }
-}
-
/* insert route into list; sorted */
static struct bgp_route_list *bgp_insert_route(struct bgp_route_list *head,
struct bgp_route_list *new)
* that if that route is later deleted we don't have to be concerned
* about adding back the more specific one).
*/
-int bgp_add_route(in_addr_t ip, in_addr_t mask)
+int bgp_add_route(in_addr_t ip, int prefixlen)
{
struct bgp_route_list *r = bgp_routes;
struct bgp_route_list add;
int i;
- bgp_cidr(ip, mask, &add.dest);
+ add.dest.prefix = ip;
+ add.dest.len = prefixlen;
add.next = 0;
/* check for duplicate */
}
/* remove route from list for peers */
-int bgp_del_route(in_addr_t ip, in_addr_t mask)
+int bgp_del_route(in_addr_t ip, int prefixlen)
{
struct bgp_route_list *r = bgp_routes;
struct bgp_route_list *e = 0;
struct bgp_route_list del;
int i;
- bgp_cidr(ip, mask, &del.dest);
+ del.dest.prefix = ip;
+ del.dest.len = prefixlen;
del.next = 0;
/* find entry in routes list and remove */
LOG(4, 0, 0, "%s BGP routing\n", enable ? "Enabled" : "Suspended");
}
-/* return a bitmask indicating if the socket should be added to the
- read set (1) and or write set (2) for select */
-int bgp_select_state(struct bgp_peer *peer)
+#ifdef HAVE_EPOLL
+# include <sys/epoll.h>
+#else
+# include "fake_epoll.h"
+#endif
+
+/* return a bitmask of the events required to poll this peer's fd */
+int bgp_set_poll()
{
- int flags = 0;
+ int i;
if (!bgp_configured)
return 0;
- if (peer->state == Disabled || peer->state == Idle)
- return 0;
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ {
+ struct bgp_peer *peer = &bgp_peers[i];
+ int events = 0;
+
+ if (peer->state == Disabled || peer->state == Idle)
+ continue;
- if (peer->inbuf->done < BGP_MAX_PACKET_SIZE)
- flags |= 1;
+ if (peer->inbuf->done < BGP_MAX_PACKET_SIZE)
+ events |= EPOLLIN;
- if (peer->state == Connect || /* connection in progress */
- peer->update_routes || /* routing updates */
- peer->outbuf->packet.header.len) /* pending output */
- flags |= 2;
+ if (peer->state == Connect || /* connection in progress */
+ peer->update_routes || /* routing updates */
+ peer->outbuf->packet.header.len) /* pending output */
+ events |= EPOLLOUT;
+
+ if (peer->events != events)
+ {
+ struct epoll_event ev;
+
+ ev.events = peer->events = events;
+ ev.data.ptr = &peer->edata;
+ epoll_ctl(epollfd, EPOLL_CTL_MOD, peer->sock, &ev);
+ }
+ }
- return flags;
+ return 1;
}
-/* process bgp peer */
-int bgp_process(struct bgp_peer *peer, int readable, int writable)
+/* process bgp events/timers */
+int bgp_process(uint32_t events[])
{
+ int i;
+
if (!bgp_configured)
return 0;
- if (*peer->name && peer->cli_flag == BGP_CLI_RESTART)
- return bgp_restart(peer);
+ for (i = 0; i < BGP_NUM_PEERS; i++)
+ {
+ struct bgp_peer *peer = &bgp_peers[i];
- if (peer->state == Disabled)
- return 1;
+ if (*peer->name && peer->cli_flag == BGP_CLI_RESTART)
+ {
+ bgp_restart(peer);
+ continue;
+ }
- if (peer->cli_flag)
- {
- switch (peer->cli_flag)
+ if (peer->state == Disabled)
+ continue;
+
+ if (peer->cli_flag)
{
- case BGP_CLI_SUSPEND:
- if (peer->routing)
+ switch (peer->cli_flag)
{
- peer->routing = 0;
- if (peer->state == Established)
- peer->update_routes = 1;
- }
+ case BGP_CLI_SUSPEND:
+ if (peer->routing)
+ {
+ peer->routing = 0;
+ if (peer->state == Established)
+ peer->update_routes = 1;
+ }
- break;
+ break;
- case BGP_CLI_ENABLE:
- if (!peer->routing)
- {
- peer->routing = 1;
- if (peer->state == Established)
- peer->update_routes = 1;
+ case BGP_CLI_ENABLE:
+ if (!peer->routing)
+ {
+ peer->routing = 1;
+ if (peer->state == Established)
+ peer->update_routes = 1;
+ }
+
+ break;
}
- break;
+ peer->cli_flag = 0;
}
- peer->cli_flag = 0;
- }
-
- /* handle empty/fill of buffers */
- if (writable)
- {
- int r = 1;
- if (peer->state == Connect)
- r = bgp_handle_connect(peer);
- else if (peer->outbuf->packet.header.len)
- r = bgp_write(peer);
+ /* handle empty/fill of buffers */
+ if (events[i] & EPOLLOUT)
+ {
+ int r = 1;
+ if (peer->state == Connect)
+ r = bgp_handle_connect(peer);
+ else if (peer->outbuf->packet.header.len)
+ r = bgp_write(peer);
- if (!r)
- return 0;
- }
+ if (!r)
+ continue;
+ }
- if (readable)
- {
- if (!bgp_read(peer))
- return 0;
- }
+ if (events[i] & (EPOLLIN|EPOLLHUP))
+ {
+ if (!bgp_read(peer))
+ continue;
+ }
- /* process input buffer contents */
- while (peer->inbuf->done >= sizeof(peer->inbuf->packet.header)
- && !peer->outbuf->packet.header.len) /* may need to queue a response */
- {
- if (bgp_handle_input(peer) < 0)
- return 0;
- }
+ /* process input buffer contents */
+ while (peer->inbuf->done >= sizeof(peer->inbuf->packet.header)
+ && !peer->outbuf->packet.header.len) /* may need to queue a response */
+ {
+ if (bgp_handle_input(peer) < 0)
+ continue;
+ }
- /* process pending updates */
- if (peer->update_routes
- && !peer->outbuf->packet.header.len) /* ditto */
- {
- if (!bgp_send_update(peer))
- return 0;
- }
+ /* process pending updates */
+ if (peer->update_routes
+ && !peer->outbuf->packet.header.len) /* ditto */
+ {
+ if (!bgp_send_update(peer))
+ continue;
+ }
- /* process timers */
- if (peer->state == Established)
- {
- if (time_now > peer->expire_time)
+ /* process timers */
+ if (peer->state == Established)
{
- LOG(1, 0, 0, "No message from BGP peer %s in %ds\n",
- peer->name, peer->hold);
+ if (time_now > peer->expire_time)
+ {
+ LOG(1, 0, 0, "No message from BGP peer %s in %ds\n",
+ peer->name, peer->hold);
- bgp_send_notification(peer, BGP_ERR_HOLD_TIMER_EXP, 0);
- return 0;
- }
+ bgp_send_notification(peer, BGP_ERR_HOLD_TIMER_EXP, 0);
+ continue;
+ }
- if (time_now > peer->keepalive_time && !peer->outbuf->packet.header.len)
- bgp_send_keepalive(peer);
- }
- else if (peer->state == Idle)
- {
- if (time_now > peer->retry_time)
- return bgp_connect(peer);
- }
- else if (time_now > peer->state_time + BGP_STATE_TIME)
- {
- LOG(1, 0, 0, "%s timer expired for BGP peer %s\n",
- bgp_state_str(peer->state), peer->name);
+ if (time_now > peer->keepalive_time && !peer->outbuf->packet.header.len)
+ bgp_send_keepalive(peer);
+ }
+ else if (peer->state == Idle)
+ {
+ if (time_now > peer->retry_time)
+ bgp_connect(peer);
+ }
+ else if (time_now > peer->state_time + BGP_STATE_TIME)
+ {
+ LOG(1, 0, 0, "%s timer expired for BGP peer %s\n",
+ bgp_state_str(peer->state), peer->name);
- return bgp_restart(peer);
+ bgp_restart(peer);
+ }
}
return 1;
{
static int bgp_port = 0;
struct sockaddr_in addr;
+ struct epoll_event ev;
if (!bgp_port)
{
return 0;
}
+ /* add to poll set */
+ ev.events = peer->events = EPOLLOUT;
+ ev.data.ptr = &peer->edata;
+ epoll_ctl(epollfd, EPOLL_CTL_ADD, peer->sock, &ev);
+
/* set to non-blocking */
fcntl(peer->sock, F_SETFL, fcntl(peer->sock, F_GETFL, 0) | O_NONBLOCK);
static int bgp_handle_connect(struct bgp_peer *peer)
{
int err = 0;
- int len = sizeof(int);
+ socklen_t len = sizeof(int);
getsockopt(peer->sock, SOL_SOCKET, SO_ERROR, &err, &len);
if (err)
{
if (notification->error_code == BGP_ERR_CEASE)
{
LOG(4, 0, 0, "BGP peer %s sent CEASE\n", peer->name);
- bgp_halt(peer);
+ bgp_restart(peer);
return 0;
}
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