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ldpd: fix bug in pseudowire control-word negotiation

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Bingen discovered a bug in the pseudowire control-word negotiation that
might happen when the "control-word exclude" command is used. Under some
very specific conditions, ldpd might ignore a PWID label mapping when
it shouldn't.

This patch removes a wrong optimization that was preventing ldpd to call
l2vpn_pw_reset() every time we change the configuration of a pseudowire.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
This commit is contained in:
Renato Westphal 2017-06-02 11:14:54 -03:00
parent f0683d2227
commit be0fbdebca
1 changed files with 2 additions and 4 deletions
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6
ldpd/ldpd.c
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@ -1673,8 +1673,7 @@ merge_l2vpn(struct ldpd_conf *xconf, struct l2vpn *l2vpn, struct l2vpn *xl)
session_shutdown(nbr, S_SHUTDOWN, 0, 0);
}
}
if (ldpd_process == PROC_LDE_ENGINE &&
!reset_nbr && reinstall_pwfec)
if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec)
l2vpn_pw_exit(pw);
pw->lsr_id = xp->lsr_id;
pw->af = xp->af;
@ -1696,8 +1695,7 @@ merge_l2vpn(struct ldpd_conf *xconf, struct l2vpn *l2vpn, struct l2vpn *xl)
pw->flags &= ~F_PW_STATIC_NBR_ADDR;
if (ldpd_process == PROC_LDP_ENGINE && reinstall_tnbr)
ldpe_l2vpn_pw_init(pw);
if (ldpd_process == PROC_LDE_ENGINE &&
!reset_nbr && reinstall_pwfec) {
if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec) {
l2vpn->pw_type = xl->pw_type;
l2vpn->mtu = xl->mtu;
l2vpn_pw_init(pw);