ldpd: do a full configuration reload upon receiving a SIGHUP

The rationale here is to do something very similar to what the original
OpenBSD's ldpd(8) does to reload configuration files:
* create a new empty base configuration (vty_conf);
* parse the configuration file and store the result in vty_conf;
* merge the new configuration into the current configuration.

To do this, introduce a new global variable called "sighup" so that ldpd
doesn't attempt to merge vty_conf into ldpd_conf for each command in
the configuration file, which would be very disruptive. vty_conf should
be merged only after the whole configuration file is parsed in order to
avoid taking actions like shutting down neighbors when not necessary.

Signed-off-by: Renato Westphal <renato@opensourcerouting.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/ldpd/ldpd.h b/ldpd/ldpd.h
index 69235556f8..a0474a5a2d 100644
--- a/ldpd/ldpd.h
+++ b/ldpd/ldpd.h
@@ -503,6 +503,7 @@ struct ldpd_af_global {
 
 struct ldpd_global {
 	int			 cmd_opts;
+	int			 sighup;
 	time_t			 uptime;
 	struct in_addr		 rtr_id;
 	struct ldpd_af_global	 ipv4;