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-rw-r--r--proto/bgp/packets.c109
1 files changed, 61 insertions, 48 deletions
diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c
index 00cdf03..4e42d90 100644
--- a/proto/bgp/packets.c
+++ b/proto/bgp/packets.c
@@ -17,6 +17,8 @@
#include "lib/unaligned.h"
#include "lib/socket.h"
+#include "nest/cli.h"
+
#include "bgp.h"
static byte *
@@ -318,7 +320,8 @@ bgp_fire_tx(struct bgp_conn *conn)
if (s & (1 << PKT_SCHEDULE_CLOSE))
{
- bgp_close_conn(conn);
+ /* We can finally close connection and enter idle state */
+ bgp_conn_enter_idle_state(conn);
return 0;
}
if (s & (1 << PKT_NOTIFICATION))
@@ -371,8 +374,17 @@ bgp_schedule_packet(struct bgp_conn *conn, int type)
DBG("BGP: Scheduling packet type %d\n", type);
conn->packets_to_send |= 1 << type;
if (conn->sk && conn->sk->tpos == conn->sk->tbuf)
- while (bgp_fire_tx(conn))
- ;
+ ev_schedule(conn->tx_ev);
+}
+
+void
+bgp_kick_tx(void *vconn)
+{
+ struct bgp_conn *conn = vconn;
+
+ DBG("BGP: kicking TX\n");
+ while (bgp_fire_tx(conn))
+ ;
}
void
@@ -406,9 +418,9 @@ bgp_parse_capabilities(struct bgp_conn *conn, byte *opt, int len)
case 65:
if (cl != 4)
goto err;
- p->as4_support = 1;
- p->as4_session = p->cf->enable_as4;
- if (p->as4_session)
+ conn->as4_support = 1;
+
+ if (p->cf->enable_as4)
conn->advertised_as = get_u32(opt + 2);
break;
@@ -477,7 +489,7 @@ bgp_rx_open(struct bgp_conn *conn, byte *pkt, int len)
/* Check state */
if (conn->state != BS_OPENSENT)
- { bgp_error(conn, 5, 0, NULL, 0); }
+ { bgp_error(conn, 5, 0, NULL, 0); return; }
/* Check message contents */
if (len < 29 || len != 29 + pkt[28])
@@ -489,7 +501,7 @@ bgp_rx_open(struct bgp_conn *conn, byte *pkt, int len)
id = get_u32(pkt+24);
BGP_TRACE(D_PACKETS, "Got OPEN(as=%d,hold=%d,id=%08x)", conn->advertised_as, hold, id);
- p->remote_id = id; // ???
+ conn->as4_support = 0; // Default value, possibly changed by capability.
if (bgp_parse_options(conn, pkt+29, pkt[28]))
return;
@@ -499,7 +511,6 @@ bgp_rx_open(struct bgp_conn *conn, byte *pkt, int len)
if (!id || id == 0xffffffff || id == p->local_id)
{ bgp_error(conn, 2, 3, pkt+24, -4); return; }
-
if (conn->advertised_as != p->remote_as)
{
bgp_error(conn, 2, 2, (byte *) &(conn->advertised_as), -4); return;
@@ -513,6 +524,7 @@ bgp_rx_open(struct bgp_conn *conn, byte *pkt, int len)
case BS_CONNECT:
case BS_ACTIVE:
case BS_OPENSENT:
+ case BS_CLOSE:
break;
case BS_OPENCONFIRM:
if ((p->local_id < id) == (conn == &p->incoming_conn))
@@ -532,19 +544,13 @@ bgp_rx_open(struct bgp_conn *conn, byte *pkt, int len)
bug("bgp_rx_open: Unknown state");
}
- /* Make this connection primary */
- conn->primary = 1;
- p->conn = conn;
-
/* Update our local variables */
- if (hold < p->cf->hold_time)
- conn->hold_time = hold;
- else
- conn->hold_time = p->cf->hold_time;
+ conn->hold_time = MIN(hold, p->cf->hold_time);
conn->keepalive_time = p->cf->keepalive_time ? : conn->hold_time / 3;
- // p->remote_as = conn->advertised_as;
p->remote_id = id;
- DBG("BGP: Hold timer set to %d, keepalive to %d, AS to %d, ID to %x\n", conn->hold_time, conn->keepalive_time, p->remote_as, p->remote_id);
+ p->as4_session = p->cf->enable_as4 && conn->as4_support;
+
+ DBG("BGP: Hold timer set to %d, keepalive to %d, AS to %d, ID to %x, AS4 session to %d\n", conn->hold_time, conn->keepalive_time, p->remote_as, p->remote_id, p->as4_session);
bgp_schedule_packet(conn, PKT_KEEPALIVE);
bgp_start_timer(conn->hold_timer, conn->hold_time);
@@ -817,24 +823,41 @@ static struct {
{ 6, 0, "Cease" }
};
+/**
+ * bgp_error_dsc - return BGP error description
+ * @buff: temporary buffer
+ * @code: BGP error code
+ * @subcode: BGP error subcode
+ *
+ * bgp_error_dsc() returns error description for BGP errors
+ * which might be static string or given temporary buffer.
+ */
+const byte *
+bgp_error_dsc(byte *buff, unsigned code, unsigned subcode)
+{
+ unsigned i;
+ for (i=0; i < ARRAY_SIZE(bgp_msg_table); i++)
+ if (bgp_msg_table[i].major == code && bgp_msg_table[i].minor == subcode)
+ {
+ return bgp_msg_table[i].msg;
+ }
+
+ bsprintf(buff, "Unknown error %d.%d", code, subcode);
+ return buff;
+}
+
void
bgp_log_error(struct bgp_proto *p, char *msg, unsigned code, unsigned subcode, byte *data, unsigned len)
{
- byte *name, namebuf[16];
+ const byte *name;
+ byte namebuf[32];
byte *t, argbuf[36];
unsigned i;
if (code == 6 && !subcode) /* Don't report Cease messages */
return;
- bsprintf(namebuf, "%d.%d", code, subcode);
- name = namebuf;
- for (i=0; i < ARRAY_SIZE(bgp_msg_table); i++)
- if (bgp_msg_table[i].major == code && bgp_msg_table[i].minor == subcode)
- {
- name = bgp_msg_table[i].msg;
- break;
- }
+ name = bgp_error_dsc(namebuf, code, subcode);
t = argbuf;
if (len)
{
@@ -857,10 +880,13 @@ bgp_rx_notification(struct bgp_conn *conn, byte *pkt, int len)
bgp_error(conn, 1, 2, pkt+16, 2);
return;
}
- bgp_log_error(conn->bgp, "Received error notification", pkt[19], pkt[20], pkt+21, len-21);
- conn->error_flag = 1;
- if (conn->primary)
- proto_notify_state(&conn->bgp->p, PS_STOP);
+
+ unsigned code = pkt[19];
+ unsigned subcode = pkt[20];
+ bgp_log_error(conn->bgp, "Received error notification", code, subcode, pkt+21, len-21);
+ bgp_store_error(conn->bgp, conn, BE_BGP_RX, (code << 16) | subcode);
+ bgp_update_startup_delay(conn->bgp, conn, code, subcode);
+ bgp_conn_enter_close_state(conn);
bgp_schedule_packet(conn, PKT_SCHEDULE_CLOSE);
}
@@ -874,10 +900,7 @@ bgp_rx_keepalive(struct bgp_conn *conn)
switch (conn->state)
{
case BS_OPENCONFIRM:
- DBG("BGP: UP!!!\n");
- conn->state = BS_ESTABLISHED;
- bgp_attr_init(conn->bgp);
- proto_notify_state(&conn->bgp->p, PS_UP);
+ bgp_conn_enter_established_state(conn);
break;
case BS_ESTABLISHED:
break;
@@ -930,18 +953,8 @@ bgp_rx(sock *sk, int size)
DBG("BGP: RX hook: Got %d bytes\n", size);
while (end >= pkt_start + BGP_HEADER_LENGTH)
{
- if (conn->error_flag)
- {
- /*
- * We still need to remember the erroneous packet, so that
- * we can generate error notifications properly. To avoid
- * subsequent reads rewriting the buffer, we just reset the
- * rx_hook.
- */
- DBG("BGP: Error, dropping input\n");
- sk->rx_hook = NULL;
- return 0;
- }
+ if ((conn->state == BS_CLOSE) || (conn->sk != sk))
+ return 0;
for(i=0; i<16; i++)
if (pkt_start[i] != 0xff)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-18 15:01:12 +0200