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bgpd: factor out TTL setting

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TTL/min TTL are set from both bgp_accept() and bgp_connect().  Factor
them out so the following change to enable iBGP GTSM becomes more
readable.

[DL: originally by Dinesh G Dutt <ddutt@cumulusnetworks.com>,
     split off from the next commit]
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
This commit is contained in:
David Lamparter 2014-05-19 22:52:04 +02:00
parent 8da8689d91
commit ef0b0c3e95
1 changed files with 12 additions and 12 deletions
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24
bgpd/bgp_network.c
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@ -145,6 +145,16 @@ bgp_update_sock_send_buffer_size (int fd)
}
}
static void
bgp_set_socket_ttl (struct peer *peer, int bgp_sock)
{
if (peer->sort == BGP_PEER_EBGP) {
sockopt_ttl (peer->su.sa.sa_family, bgp_sock, peer->ttl);
if (peer->gtsm_hops)
sockopt_minttl (peer->su.sa.sa_family, bgp_sock, MAXTTL + 1 - peer->gtsm_hops);
}
}
/* Accept bgp connection. */
static int
bgp_accept (struct thread *thread)
@ -198,12 +208,7 @@ bgp_accept (struct thread *thread)
return -1;
}
/* In case of peer is EBGP, we should set TTL for this connection. */
if (peer1->sort == BGP_PEER_EBGP) {
sockopt_ttl (peer1->su.sa.sa_family, bgp_sock, peer1->ttl);
if (peer1->gtsm_hops)
sockopt_minttl (peer1->su.sa.sa_family, bgp_sock, MAXTTL + 1 - peer1->gtsm_hops);
}
bgp_set_socket_ttl (peer1, bgp_sock);
/* Make dummy peer until read Open packet. */
if (BGP_DEBUG (events, EVENTS))
@ -336,12 +341,7 @@ bgp_connect (struct peer *peer)
/* Set socket send buffer size */
bgp_update_sock_send_buffer_size(peer->fd);
/* If we can get socket for the peer, adjest TTL and make connection. */
if (peer->sort == BGP_PEER_EBGP) {
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
if (peer->gtsm_hops)
sockopt_minttl (peer->su.sa.sa_family, peer->fd, MAXTTL + 1 - peer->gtsm_hops);
}
bgp_set_socket_ttl (peer, peer->fd);
sockopt_reuseaddr (peer->fd);
sockopt_reuseport (peer->fd);