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Make BGP protocol instance search a separate function

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Thanks to Alexander V. Chernikov for the patch.
This commit is contained in:
Ondrej Zajicek 2015-02-21 20:39:59 +01:00
parent 6264aad16f
commit 374917adcc
1 changed files with 63 additions and 43 deletions
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56
proto/bgp/bgp.c
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@ -712,6 +712,28 @@ bgp_connect(struct bgp_proto *p) /* Enter Connect state and start establishing c
return; return;
} }
/**
* bgp_find_proto - find existing proto for incoming connection
* @sk: TCP socket
*
*/
static struct bgp_proto *
bgp_find_proto(sock *sk)
{
struct proto_config *pc;
WALK_LIST(pc, config->protos)
if ((pc->protocol == &proto_bgp) && pc->proto)
{
struct bgp_proto *p = (struct bgp_proto *) pc->proto;
if (ipa_equal(p->cf->remote_ip, sk->daddr) &&
(!ipa_is_link_local(sk->daddr) || (p->cf->iface == sk->iface)))
return p;
}
return NULL;
}
/** /**
* bgp_incoming_connection - handle an incoming connection * bgp_incoming_connection - handle an incoming connection
* @sk: TCP socket * @sk: TCP socket
@ -727,18 +749,21 @@ bgp_connect(struct bgp_proto *p) /* Enter Connect state and start establishing c
static int static int
bgp_incoming_connection(sock *sk, int dummy UNUSED) bgp_incoming_connection(sock *sk, int dummy UNUSED)
{ {
struct proto_config *pc; struct bgp_proto *p;
int acc, hops;
DBG("BGP: Incoming connection from %I port %d\n", sk->daddr, sk->dport); DBG("BGP: Incoming connection from %I port %d\n", sk->daddr, sk->dport);
WALK_LIST(pc, config->protos) p = bgp_find_proto(sk);
if (pc->protocol == &proto_bgp && pc->proto) if (!p)
{
struct bgp_proto *p = (struct bgp_proto *) pc->proto;
if (ipa_equal(p->cf->remote_ip, sk->daddr) &&
(!ipa_is_link_local(sk->daddr) || (p->cf->iface == sk->iface)))
{ {
log(L_WARN "BGP: Unexpected connect from unknown address %I%J (port %d)",
sk->daddr, ipa_is_link_local(sk->daddr) ? sk->iface : NULL, sk->dport);
rfree(sk);
return 0;
}
/* We are in proper state and there is no other incoming connection */ /* We are in proper state and there is no other incoming connection */
int acc = (p->p.proto_state == PS_START || p->p.proto_state == PS_UP) && acc = (p->p.proto_state == PS_START || p->p.proto_state == PS_UP) &&
(p->start_state >= BSS_CONNECT) && (!p->incoming_conn.sk); (p->start_state >= BSS_CONNECT) && (!p->incoming_conn.sk);
if (p->conn && (p->conn->state == BS_ESTABLISHED) && p->gr_ready) if (p->conn && (p->conn->state == BS_ESTABLISHED) && p->gr_ready)
@ -754,9 +779,12 @@ bgp_incoming_connection(sock *sk, int dummy UNUSED)
sk->dport, acc ? "accepted" : "rejected"); sk->dport, acc ? "accepted" : "rejected");
if (!acc) if (!acc)
goto reject; {
rfree(sk);
return 0;
}
int hops = p->cf->multihop ? : 1; hops = p->cf->multihop ? : 1;
if (sk_set_ttl(sk, p->cf->ttl_security ? 255 : hops) < 0) if (sk_set_ttl(sk, p->cf->ttl_security ? 255 : hops) < 0)
goto err; goto err;
@ -776,14 +804,6 @@ bgp_incoming_connection(sock *sk, int dummy UNUSED)
rfree(sk); rfree(sk);
return 0; return 0;
} }
}
log(L_WARN "BGP: Unexpected connect from unknown address %I%J (port %d)",
sk->daddr, ipa_is_link_local(sk->daddr) ? sk->iface : NULL, sk->dport);
reject:
rfree(sk);
return 0;
}
static void static void
bgp_listen_sock_err(sock *sk UNUSED, int err) bgp_listen_sock_err(sock *sk UNUSED, int err)