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2004-02-17 Paul Jakma <paul@dishone.st>

Browse Source 
* bgpd.h: (bgp_peer) add fd_local and fd_accept
          file descriptor's, fd becomes a pointer to one of these.
        * bgpd.c: (global) adjust for fact that fd is now a pointer.
          (peer_create_accept) removed.
        * bgp_route.c: (global) adjust for change of peer fd to pointer
        * bgp_packet.c: (bgp_collision_detect) adjust and remove the
          "replace with other peer" hack.
        * bgp_network.c: (bgp_accept) Remove the dummy peer hack.
          Update peer->fd_accept instead.
          (global) Adjust fd references - now a pointer.
        * bgp_fsm.c: (global) adjust peer fd to pointer.
          (bgp_connection_stop) new function, to stop connection.
          (global) adjust everything which closed peer fd to use
          bgp_connection_stop().
This commit is contained in:
paul 2004-02-17 19:45:10 +00:00
parent 5de5bbf107
commit 6ad23f05e3
7 changed files with 174 additions and 208 deletions
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19
bgpd/ChangeLog
View File

@ -1,8 +1,25 @@
2004-02-17 Paul Jakma <paul@dishone.st>
* bgpd.h: (bgp_peer) add fd_local and fd_accept
file descriptor's, fd becomes a pointer to one of these.
* bgpd.c: (global) adjust for fact that fd is now a pointer.
(peer_create_accept) removed.
* bgp_route.c: (global) adjust for change of peer fd to pointer
* bgp_packet.c: (bgp_collision_detect) adjust and remove the
"replace with other peer" hack.
* bgp_network.c: (bgp_accept) Remove the dummy peer hack.
Update peer->fd_accept instead.
(global) Adjust fd references - now a pointer.
* bgp_fsm.c: (global) adjust peer fd to pointer.
(bgp_connection_stop) new function, to stop connection.
(global) adjust everything which closed peer fd to use
bgp_connection_stop().
2003-12-23 Krzysztof Oledzki <oleq@ans.pl>
* bgp_network.c: drop privs on error cases
2003-08-11 kunihiro <kunihiro@zebra.org
2003-08-11 kunihiro <kunihiro@zebra.org>
* bgp_route{,map}.c: Extend 'set ip next-hop' in route-maps with
ability to specify 'peer-address' rather than IP.

39
bgpd/bgp_fsm.c
View File

@ -292,7 +292,7 @@ bgp_routeadv_timer (struct thread *thread)
peer->synctime = time (NULL);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
BGP_TIMER_ON (peer->t_routeadv, bgp_routeadv_timer,
peer->v_routeadv);
@ -307,6 +307,21 @@ bgp_uptime_reset (struct peer *peer)
peer->uptime = time (NULL);
}
void
bgp_connection_stop (struct peer *peer)
{
if (peer->fd_local >= 0)
{
close (peer->fd_local);
peer->fd_local = -1;
}
if (peer->fd_accept >= 0)
{
close (peer->fd_accept);
peer->fd_accept = -1;
}
}
/* Administrative BGP peer stop event. */
int
bgp_stop (struct peer *peer)
@ -367,12 +382,8 @@ bgp_stop (struct peer *peer)
stream_reset (peer->work);
stream_fifo_clean (peer->obuf);
/* Close of file descriptor. */
if (peer->fd >= 0)
{
close (peer->fd);
peer->fd = -1;
}
/* Close of connections. */
bgp_connection_stop (peer);
/* Connection information. */
if (peer->su_local)
@ -477,13 +488,13 @@ bgp_stop_with_error (struct peer *peer)
int
bgp_connect_success (struct peer *peer)
{
if (peer->fd < 0)
if (peer->fd_local < 0)
{
zlog_err ("bgp_connect_success peer's fd is negative value %d",
peer->fd);
peer->fd_local);
return -1;
}
BGP_READ_ON (peer->t_read, bgp_read, peer->fd);
BGP_READ_ON (peer->t_read, bgp_read, peer->fd_local);
/* bgp_getsockname (peer); */
@ -536,14 +547,14 @@ bgp_start (struct peer *peer)
if (BGP_DEBUG (fsm, FSM))
plog_info (peer->log, "%s [FSM] Non blocking connect waiting result",
peer->host);
if (peer->fd < 0)
if (*peer->fd < 0)
{
zlog_err ("bgp_start peer's fd is negative value %d",
peer->fd);
*peer->fd);
return -1;
}
BGP_READ_ON (peer->t_read, bgp_read, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_READ_ON (peer->t_read, bgp_read, *peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
break;
}
return 0;

56
bgpd/bgp_network.c
View File

@ -46,7 +46,6 @@ bgp_accept (struct thread *thread)
int accept_sock;
union sockunion su;
struct peer *peer;
struct peer *peer1;
struct bgp *bgp;
char buf[SU_ADDRSTRLEN];
@ -73,12 +72,12 @@ bgp_accept (struct thread *thread)
zlog_info ("[Event] BGP connection from host %s", inet_sutop (&su, buf));
/* Check remote IP address */
peer1 = peer_lookup (bgp, &su);
if (! peer1 || peer1->status == Idle)
peer = peer_lookup (bgp, &su);
if (! peer || peer->status == Idle)
{
if (BGP_DEBUG (events, EVENTS))
{
if (! peer1)
if (! peer)
zlog_info ("[Event] BGP connection IP address %s is not configured",
inet_sutop (&su, buf));
else
@ -90,30 +89,13 @@ bgp_accept (struct thread *thread)
}
/* In case of peer is EBGP, we should set TTL for this connection. */
if (peer_sort (peer1) == BGP_PEER_EBGP)
sockopt_ttl (peer1->su.sa.sa_family, bgp_sock, peer1->ttl);
if (peer_sort (peer) == BGP_PEER_EBGP)
sockopt_ttl (peer->su.sa.sa_family, bgp_sock, peer->ttl);
if (! bgp)
bgp = peer1->bgp;
bgp = peer->bgp;
/* Make dummy peer until read Open packet. */
if (BGP_DEBUG (events, EVENTS))
zlog_info ("[Event] Make dummy peer structure until read Open packet");
{
char buf[SU_ADDRSTRLEN + 1];
peer = peer_create_accept (bgp);
SET_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER);
peer->su = su;
peer->fd = bgp_sock;
peer->status = Active;
peer->local_id = peer1->local_id;
/* Make peer's address string. */
sockunion2str (&su, buf, SU_ADDRSTRLEN);
peer->host = strdup (buf);
}
peer->fd_accept = bgp_sock;
BGP_EVENT_ADD (peer, TCP_connection_open);
@ -133,7 +115,7 @@ bgp_bind (struct peer *peer)
strncpy ((char *)&ifreq.ifr_name, peer->ifname, sizeof (ifreq.ifr_name));
ret = setsockopt (peer->fd, SOL_SOCKET, SO_BINDTODEVICE,
ret = setsockopt (*peer->fd, SOL_SOCKET, SO_BINDTODEVICE,
&ifreq, sizeof (ifreq));
if (ret < 0)
{
@ -207,12 +189,12 @@ bgp_update_source (struct peer *peer)
if (! addr)
return;
bgp_bind_address (peer->fd, addr);
bgp_bind_address (*peer->fd, addr);
}
/* Source is specified with IP address. */
if (peer->update_source)
sockunion_bind (peer->fd, peer->update_source, 0, peer->update_source);
sockunion_bind (*peer->fd, peer->update_source, 0, peer->update_source);
}
/* BGP try to connect to the peer. */
@ -222,16 +204,16 @@ bgp_connect (struct peer *peer)
unsigned int ifindex = 0;
/* Make socket for the peer. */
peer->fd = sockunion_socket (&peer->su);
if (peer->fd < 0)
*peer->fd = sockunion_socket (&peer->su);
if (*peer->fd < 0)
return -1;
/* If we can get socket for the peer, adjest TTL and make connection. */
if (peer_sort (peer) == BGP_PEER_EBGP)
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
sockopt_ttl (peer->su.sa.sa_family, *peer->fd, peer->ttl);
sockopt_reuseaddr (peer->fd);
sockopt_reuseport (peer->fd);
sockopt_reuseaddr (*peer->fd);
sockopt_reuseport (*peer->fd);
/* Bind socket. */
bgp_bind (peer);
@ -246,10 +228,10 @@ bgp_connect (struct peer *peer)
if (BGP_DEBUG (events, EVENTS))
plog_info (peer->log, "%s [Event] Connect start to %s fd %d",
peer->host, peer->host, peer->fd);
peer->host, peer->host, *peer->fd);
/* Connect to the remote peer. */
return sockunion_connect (peer->fd, &peer->su, htons (peer->port), ifindex);
return sockunion_connect (*peer->fd, &peer->su, htons (peer->port), ifindex);
}
/* After TCP connection is established. Get local address and port. */
@ -268,8 +250,8 @@ bgp_getsockname (struct peer *peer)
peer->su_remote = NULL;
}
peer->su_local = sockunion_getsockname (peer->fd);
peer->su_remote = sockunion_getpeername (peer->fd);
peer->su_local = sockunion_getsockname (*peer->fd);
peer->su_remote = sockunion_getpeername (*peer->fd);
bgp_nexthop_set (peer->su_local, peer->su_remote, &peer->nexthop, peer);
}

105
bgpd/bgp_packet.c
View File

@ -133,7 +133,7 @@ bgp_connect_check (struct peer *peer)
/* Check file descriptor. */
slen = sizeof (status);
ret = getsockopt(peer->fd, SOL_SOCKET, SO_ERROR, (void *) &status, &slen);
ret = getsockopt(*peer->fd, SOL_SOCKET, SO_ERROR, (void *) &status, &slen);
/* If getsockopt is fail, this is fatal error. */
if (ret < 0)
@ -238,7 +238,6 @@ bgp_update_packet (struct peer *peer, afi_t afi, safi_t safi)
bgp_packet_set_size (s);
packet = bgp_packet_dup (s);
bgp_packet_add (peer, packet);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
stream_reset (s);
return packet;
}
@ -395,7 +394,7 @@ bgp_default_update_send (struct peer *peer, struct attr *attr,
/* Add packet to the peer. */
bgp_packet_add (peer, packet);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
}
void
@ -469,7 +468,7 @@ bgp_default_withdraw_send (struct peer *peer, afi_t afi, safi_t safi)
/* Add packet to the peer. */
bgp_packet_add (peer, packet);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
}
/* Get next packet to be written. */
@ -575,7 +574,7 @@ bgp_write (struct thread *thread)
writenum = stream_get_endp (s) - stream_get_getp (s);
/* Call write() system call. */
num = write (peer->fd, STREAM_PNT (s), writenum);
num = write (*peer->fd, STREAM_PNT (s), writenum);
write_errno = errno;
if (num <= 0)
{
@ -645,7 +644,7 @@ bgp_write (struct thread *thread)
}
if (bgp_write_proceed (peer))
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
return 0;
}
@ -665,7 +664,7 @@ bgp_write_notify (struct peer *peer)
assert (stream_get_endp (s) >= BGP_HEADER_SIZE);
/* I'm not sure fd is writable. */
ret = writen (peer->fd, STREAM_DATA (s), stream_get_endp (s));
ret = writen (*peer->fd, STREAM_DATA (s), stream_get_endp (s));
if (ret <= 0)
{
bgp_stop (peer);
@ -725,7 +724,7 @@ bgp_keepalive_send (struct peer *peer)
/* Add packet to the peer. */
bgp_packet_add (peer, s);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
}
/* Make open packet and send it to the peer. */
@ -780,7 +779,7 @@ bgp_open_send (struct peer *peer)
/* Add packet to the peer. */
bgp_packet_add (peer, s);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
}
/* Send BGP notify packet with data potion. */
@ -981,7 +980,7 @@ bgp_route_refresh_send (struct peer *peer, afi_t afi, safi_t safi,
/* Add packet to the peer. */
bgp_packet_add (peer, packet);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
}
/* Send capability message to the peer. */
@ -1048,14 +1047,13 @@ bgp_capability_send (struct peer *peer, afi_t afi, safi_t safi,
zlog_info ("%s send message type %d, length (incl. header) %d",
peer->host, BGP_MSG_CAPABILITY, length);
BGP_WRITE_ON (peer->t_write, bgp_write, peer->fd);
BGP_WRITE_ON (peer->t_write, bgp_write, *peer->fd);
}
/* RFC1771 6.8 Connection collision detection. */
int
bgp_collision_detect (struct peer *new, struct in_addr remote_id)
bgp_collision_detect (struct peer *peer, struct in_addr remote_id)
{
struct peer *peer;
struct listnode *nn;
struct bgp *bgp;
@ -1076,10 +1074,9 @@ bgp_collision_detect (struct peer *new, struct in_addr remote_id)
{
/* Under OpenConfirm status, local peer structure already hold
remote router ID. */
if (peer != new
&& (peer->status == OpenConfirm || peer->status == OpenSent)
&& sockunion_same (&peer->su, &new->su))
if ((peer->status == OpenConfirm)
&& ( ntohl(peer->remote_id.s_addr) == ntohl(remote_id.s_addr) )
)
{
/* 1. The BGP Identifier of the local system is compared to
the BGP Identifier of the remote system (as specified in
@ -1093,8 +1090,16 @@ bgp_collision_detect (struct peer *new, struct in_addr remote_id)
already in the OpenConfirm state), and accepts BGP
connection initiated by the remote system. */
if (peer->fd >= 0)
bgp_notify_send (peer, BGP_NOTIFY_CEASE, 0);
if (peer->fd_local >= 0)
{
BGP_WRITE_OFF (peer->t_write);
BGP_READ_OFF (peer->t_read);
close (peer->fd_local);
}
peer->fd_local = -1;
peer->fd = &peer->fd_accept;
BGP_READ_ON (peer->t_read, bgp_read, *peer->fd);
return 1;
}
else
@ -1105,8 +1110,11 @@ bgp_collision_detect (struct peer *new, struct in_addr remote_id)
existing one (the one that is already in the
OpenConfirm state). */
if (new->fd >= 0)
bgp_notify_send (new, BGP_NOTIFY_CEASE, 0);
if (peer->fd_accept >= 0)
{
close (peer->fd_accept);
peer->fd_accept = -1;
}
return -1;
}
}
@ -1187,51 +1195,6 @@ bgp_open_receive (struct peer *peer, bgp_size_t size)
if (ret < 0)
return ret;
/* Hack part. */
if (CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
{
if (ret == 0 && realpeer->status != Active
&& realpeer->status != OpenSent
&& realpeer->status != OpenConfirm)
{
if (BGP_DEBUG (events, EVENTS))
zlog_info ("%s [Event] peer's status is %s close connection",
realpeer->host, LOOKUP (bgp_status_msg, peer->status));
return -1;
}
if (BGP_DEBUG (events, EVENTS))
zlog_info ("%s [Event] Transfer temporary BGP peer to existing one",
peer->host);
bgp_stop (realpeer);
/* Transfer file descriptor. */
realpeer->fd = peer->fd;
peer->fd = -1;
/* Transfer input buffer. */
stream_free (realpeer->ibuf);
realpeer->ibuf = peer->ibuf;
realpeer->packet_size = peer->packet_size;
peer->ibuf = NULL;
/* Transfer status. */
realpeer->status = peer->status;
bgp_stop (peer);
/* peer pointer change. Open packet send to neighbor. */
peer = realpeer;
bgp_open_send (peer);
if (peer->fd < 0)
{
zlog_err ("bgp_open_receive peer's fd is negative value %d",
peer->fd);
return -1;
}
BGP_READ_ON (peer->t_read, bgp_read, peer->fd);
}
/* remote router-id check. */
if (remote_id.s_addr == 0
|| ntohl (remote_id.s_addr) >= 0xe0000000
@ -2031,7 +1994,7 @@ bgp_read_packet (struct peer *peer)
return 0;
/* Read packet from fd. */
nbytes = stream_read_unblock (peer->ibuf, peer->fd, readsize);
nbytes = stream_read_unblock (peer->ibuf, *peer->fd, readsize);
/* If read byte is smaller than zero then error occured. */
if (nbytes < 0)
@ -2050,7 +2013,7 @@ bgp_read_packet (struct peer *peer)
{
if (BGP_DEBUG (events, EVENTS))
plog_info (peer->log, "%s [Event] BGP connection closed fd %d",
peer->host, peer->fd);
peer->host, *peer->fd);
BGP_EVENT_ADD (peer, TCP_connection_closed);
return -1;
}
@ -2097,12 +2060,12 @@ bgp_read (struct thread *thread)
}
else
{
if (peer->fd < 0)
if (*peer->fd < 0)
{
zlog_err ("bgp_read peer's fd is negative value %d", peer->fd);
zlog_err ("bgp_read peer's fd is negative value %d", *peer->fd);
return -1;
}
BGP_READ_ON (peer->t_read, bgp_read, peer->fd);
BGP_READ_ON (peer->t_read, bgp_read, *peer->fd);
}
/* Read packet header to determine type of the packet */

3
bgpd/bgp_route.c
View File

@ -4202,7 +4202,8 @@ route_vty_out_detail (struct vty *vty, struct bgp *bgp, struct prefix *p,
vty_out (vty, " (inaccessible)");
else if (binfo->igpmetric)
vty_out (vty, " (metric %d)", binfo->igpmetric);
vty_out (vty, " from %s", sockunion2str (&binfo->peer->su, buf, SU_ADDRSTRLEN));
vty_out (vty, " from %s",
sockunion2str (&binfo->peer->su, buf, SU_ADDRSTRLEN));
if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_ORIGINATOR_ID))
vty_out (vty, " (%s)", inet_ntoa (attr->originator_id));
else

48
bgpd/bgpd.c
View File

@ -504,7 +504,6 @@ bgp_default_local_preference_unset (struct bgp *bgp)
return 0;
}
/* Peer comparison function for sorting. */
static int
peer_cmp (struct peer *p1, struct peer *p2)
{
@ -684,8 +683,11 @@ peer_new ()
peer = XMALLOC (MTYPE_BGP_PEER, sizeof (struct peer));
memset (peer, 0, sizeof (struct peer));
peer->fd = &peer->fd_local;
/* Set default value. */
peer->fd = -1;
peer->fd_local = -1;
peer->fd_accept = -1;
peer->v_start = BGP_INIT_START_TIMER;
peer->v_connect = BGP_DEFAULT_CONNECT_RETRY;
peer->v_asorig = BGP_DEFAULT_ASORIGINATE;
@ -769,19 +771,6 @@ peer_create (union sockunion *su, struct bgp *bgp, as_t local_as,
return peer;
}
/* Make accept BGP peer. Called from bgp_accept (). */
struct peer *
peer_create_accept (struct bgp *bgp)
{
struct peer *peer;
peer = peer_new ();
peer->bgp = bgp;
listnode_add_sort (bgp->peer, peer);
return peer;
}
/* Change peer's AS number. */
void
peer_as_change (struct peer *peer, as_t as)
@ -1810,8 +1799,7 @@ peer_lookup (struct bgp *bgp, union sockunion *su)
LIST_LOOP (bgp->peer, peer, nn)
{
if (sockunion_same (&peer->su, su)
&& ! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
if (sockunion_same (&peer->su, su))
return peer;
}
return NULL;
@ -1831,8 +1819,7 @@ peer_lookup_with_open (union sockunion *su, as_t remote_as,
LIST_LOOP (bgp->peer, peer, nn)
{
if (sockunion_same (&peer->su, su)
&& ! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
if (sockunion_same (&peer->su, su))
{
if (peer->as == remote_as
&& peer->remote_id.s_addr == remote_id->s_addr)
@ -1843,8 +1830,7 @@ peer_lookup_with_open (union sockunion *su, as_t remote_as,
}
LIST_LOOP (bgp->peer, peer, nn)
{
if (sockunion_same (&peer->su, su)
&& ! CHECK_FLAG (peer->sflags, PEER_STATUS_ACCEPT_PEER))
if (sockunion_same (&peer->su, su))
{
if (peer->as == remote_as
&& peer->remote_id.s_addr == 0)
@ -2278,8 +2264,9 @@ peer_ebgp_multihop_set (struct peer *peer, int ttl)
if (! CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP))
{
if (peer->fd >= 0 && peer_sort (peer) != BGP_PEER_IBGP)
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
if (*peer->fd >= 0 && peer_sort (peer) != BGP_PEER_IBGP)
sockopt_ttl (peer->su.sa.sa_family, *peer->fd,
peer->ttl);
}
else
{
@ -2291,8 +2278,9 @@ peer_ebgp_multihop_set (struct peer *peer, int ttl)
peer->ttl = group->conf->ttl;
if (peer->fd >= 0)
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
if (*peer->fd >= 0)
sockopt_ttl (peer->su.sa.sa_family,
*peer->fd, peer->ttl);
}
}
return 0;
@ -2314,8 +2302,9 @@ peer_ebgp_multihop_unset (struct peer *peer)
if (! CHECK_FLAG (peer->sflags, PEER_STATUS_GROUP))
{
if (peer->fd >= 0 && peer_sort (peer) != BGP_PEER_IBGP)
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
if (*peer->fd >= 0 && peer_sort (peer) != BGP_PEER_IBGP)
sockopt_ttl (peer->su.sa.sa_family,
*peer->fd, peer->ttl);
}
else
{
@ -2327,8 +2316,9 @@ peer_ebgp_multihop_unset (struct peer *peer)
peer->ttl = 1;
if (peer->fd >= 0)
sockopt_ttl (peer->su.sa.sa_family, peer->fd, peer->ttl);
if (*peer->fd >= 0)
sockopt_ttl (peer->su.sa.sa_family,
*peer->fd, peer->ttl);
}
}
return 0;

10
bgpd/bgpd.h
View File

@ -256,8 +256,10 @@ struct peer
int ostatus;
/* Peer information */
int fd; /* File descriptor */
int *fd; /* connection in use: -> local||accept */
int ttl; /* TTL of TCP connection to the peer. */
int fd_local; /* locally initiated connection */
int fd_accept; /* remote initiated/accepted connection */
char *desc; /* Description of the peer. */
unsigned short port; /* Destination port for peer */
char *host; /* Printable address of the peer. */
@ -268,9 +270,9 @@ struct peer
unsigned int ifindex; /* ifindex of the BGP connection. */
char *ifname; /* bind interface name. */
char *update_if;
union sockunion *update_source;
struct zlog *log;
char *update_if; /* interface to send from */
union sockunion *update_source; /* sockunion to send from */
struct zlog *log; /* log socket */
u_char version; /* Peer BGP version. */
union sockunion *su_local; /* Sockunion of local address. */