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BFD protocol, ready for release.

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Supports OSPF and BGP and also statically configured sessions.
This commit is contained in:
Ondrej Zajicek
2013-11-19 22:33:48 +01:00
parent 0e175f9f0f
commit 1ec522538f
25 changed files with 1043 additions and 227 deletions
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48
proto/bgp/bgp.c
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@@ -59,8 +59,9 @@
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "nest/locks.h"
#include "nest/bfd.h"
#include "nest/cli.h"
#include "nest/locks.h"
#include "conf/conf.h"
#include "lib/socket.h"
#include "lib/resource.h"
@@ -76,6 +77,7 @@ static void bgp_close(struct bgp_proto *p, int apply_md5);
static void bgp_connect(struct bgp_proto *p);
static void bgp_active(struct bgp_proto *p);
static sock *bgp_setup_listen_sk(ip_addr addr, unsigned port, u32 flags);
static void bgp_update_bfd(struct bgp_proto *p, int use_bfd);
/**
@@ -153,8 +155,12 @@ bgp_initiate(struct bgp_proto *p)
if (rv < 0)
return;
if (p->cf->bfd)
bgp_update_bfd(p, p->cf->bfd);
if (p->startup_delay)
{
p->start_state = BSS_DELAY;
BGP_TRACE(D_EVENTS, "Startup delayed by %d seconds", p->startup_delay);
bgp_start_timer(p->startup_timer, p->startup_delay);
}
@@ -765,6 +771,37 @@ bgp_neigh_notify(neighbor *n)
}
}
static void
bgp_bfd_notify(struct bfd_request *req)
{
struct bgp_proto *p = req->data;
int ps = p->p.proto_state;
if (req->down && ((ps == PS_START) || (ps == PS_UP)))
{
BGP_TRACE(D_EVENTS, "BFD session down");
bgp_store_error(p, NULL, BE_MISC, BEM_BFD_DOWN);
if (ps == PS_UP)
bgp_update_startup_delay(p);
bgp_stop(p, 0);
}
}
static void
bgp_update_bfd(struct bgp_proto *p, int use_bfd)
{
if (use_bfd && !p->bfd_req)
p->bfd_req = bfd_request_session(p->p.pool, p->cf->remote_ip, p->source_addr,
p->cf->multihop ? NULL : p->neigh->iface,
bgp_bfd_notify, p);
if (!use_bfd && p->bfd_req)
{
rfree(p->bfd_req);
p->bfd_req = NULL;
}
}
static int
bgp_reload_routes(struct proto *P)
{
@@ -825,6 +862,7 @@ bgp_start(struct proto *P)
p->outgoing_conn.state = BS_IDLE;
p->incoming_conn.state = BS_IDLE;
p->neigh = NULL;
p->bfd_req = NULL;
rt_lock_table(p->igp_table);
@@ -992,6 +1030,9 @@ bgp_check_config(struct bgp_config *c)
ipa_has_link_scope(c->source_addr)))
cf_error("Multihop BGP cannot be used with link-local addresses");
if (c->multihop && c->bfd && ipa_zero(c->source_addr))
cf_error("Multihop BGP with BFD requires specified source address");
/* Different default based on rs_client */
if (!c->missing_lladdr)
@@ -1034,6 +1075,9 @@ bgp_reconfigure(struct proto *P, struct proto_config *C)
|| (old->password && new->password && !strcmp(old->password, new->password)))
&& (get_igp_table(old) == get_igp_table(new));
if (same && (p->start_state > BSS_PREPARE))
bgp_update_bfd(p, new->bfd);
/* We should update our copy of configuration ptr as old configuration will be freed */
if (same)
p->cf = new;
@@ -1115,7 +1159,7 @@ bgp_store_error(struct bgp_proto *p, struct bgp_conn *c, u8 class, u32 code)
static char *bgp_state_names[] = { "Idle", "Connect", "Active", "OpenSent", "OpenConfirm", "Established", "Close" };
static char *bgp_err_classes[] = { "", "Error: ", "Socket: ", "Received: ", "BGP Error: ", "Automatic shutdown: ", ""};
static char *bgp_misc_errors[] = { "", "Neighbor lost", "Invalid next hop", "Kernel MD5 auth failed", "No listening socket" };
static char *bgp_misc_errors[] = { "", "Neighbor lost", "Invalid next hop", "Kernel MD5 auth failed", "No listening socket", "BFD session down" };
static char *bgp_auto_errors[] = { "", "Route limit exceeded"};
static const char *