Author: adrian.chadd
Date: Tue Feb 24 08:47:43 2009
New Revision: 13863
Modified:
playpen/LUSCA_HEAD_bgp/libsqbgp/bgp_core.c
Log:
Modify the BGP core to pay attention to the withdraw/shutdown flags.
If the shutdown flag is clear, then routes are not cleared; the generation
ID is simply bumped.
If the withdraw flag is clear, then routes are not withdrawn; they're
simply masked as historical.
Modified: playpen/LUSCA_HEAD_bgp/libsqbgp/bgp_core.c
==============================================================================
--- playpen/LUSCA_HEAD_bgp/libsqbgp/bgp_core.c (original)
+++ playpen/LUSCA_HEAD_bgp/libsqbgp/bgp_core.c Tue Feb 24 08:47:43 2009
@@ -116,7 +116,10 @@
if (r) {
/* Now, we need to poke the RIB with our saved
info */
for (i = 0; i < us.withdraw_cnt; i++) {
- bgp_rib_del_net(&bi->rn,
us.withdraw[i],
us.withdraw_mask[i]);
+ if (bi->cfg.clear_rib_on_withdraw)
+ bgp_rib_del_net(&bi->rn,
us.withdraw[i],
us.withdraw_mask[i]);
+ else
+ (void)
bgp_rib_mark_historical(&bi->rn,
us.withdraw[i], us.withdraw_mask[i]);
}
for (i = 0; i < us.nlri_cnt; i++) {
bgp_rib_add_net(&bi->rn, us.nlri[i],
us.nlri_mask[i],
us.aspaths[us.aspath_len - 1]);
@@ -189,8 +192,10 @@
bi->state = BGP_IDLE;
bi->lcl.hold_timer = bi->rem.hold_timer = -1;
/* free prefixes */
- bgp_rib_clean(&bi->rn);
- /* ensure no as path entries exist in the hash! */
+ if (bi->cfg.clear_rib_on_shutdown)
+ bgp_rib_clean(&bi->rn);
+ else
+ bgp_rib_bump_genid(&bi->rn);
}
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