struct bgpd_config *
new_config(void)
{
struct bgpd_config *conf;
if ((conf = calloc(1, sizeof(struct bgpd_config))) == NULL)
fatal(NULL);
conf->min_holdtime = MIN_HOLDTIME;
conf->bgpid = get_bgpid();
conf->fib_priority = RTP_BGP;
if ((conf->csock = strdup(SOCKET_NAME)) == NULL)
fatal(NULL);
if ((conf->filters = calloc(1, sizeof(struct filter_head))) == NULL)
fatal(NULL);
if ((conf->listen_addrs = calloc(1, sizeof(struct listen_addrs))) ==
NULL)
fatal(NULL);
if ((conf->mrt = calloc(1, sizeof(struct mrt_head))) == NULL)
fatal(NULL);
/* init the various list for later */
TAILQ_INIT(&conf->networks);
SIMPLEQ_INIT(&conf->rdomains);
TAILQ_INIT(conf->filters);
TAILQ_INIT(conf->listen_addrs);
LIST_INIT(conf->mrt);
return (conf);
}
int
merge_config(struct bgpd_config *xconf, struct bgpd_config *conf,
struct peer *peer_l, struct listen_addrs *listen_addrs)
{
struct listen_addr *nla, *ola, *next;
/*
* merge the freshly parsed conf into the running xconf
*/
/* preserve cmd line opts */
conf->opts = xconf->opts;
conf->csock = xconf->csock;
conf->rcsock = xconf->rcsock;
if (!conf->as) {
log_warnx("configuration error: AS not given");
return (1);
}
if (!conf->min_holdtime)
conf->min_holdtime = MIN_HOLDTIME;
if (!conf->bgpid)
conf->bgpid = get_bgpid();
if ((conf->flags & BGPD_FLAG_REFLECTOR) && conf->clusterid == 0)
conf->clusterid = conf->bgpid;
conf->listen_addrs = xconf->listen_addrs;
memcpy(xconf, conf, sizeof(struct bgpd_config));
if (conf->listen_addrs == NULL) {
/* there is no old conf, just copy new one over */
xconf->listen_addrs = listen_addrs;
TAILQ_FOREACH(nla, xconf->listen_addrs, entry)
nla->reconf = RECONF_REINIT;
} else {
/*
* merge new listeners:
* -flag all existing ones as to be deleted
* -those that are in both new and old: flag to keep
* -new ones get inserted and flagged as to reinit
* -remove all that are still flagged for deletion
*/
TAILQ_FOREACH(nla, xconf->listen_addrs, entry)
nla->reconf = RECONF_DELETE;
/* no new listeners? preserve default ones */
if (TAILQ_EMPTY(listen_addrs))
TAILQ_FOREACH(ola, xconf->listen_addrs, entry)
if (ola->flags & DEFAULT_LISTENER)
ola->reconf = RECONF_KEEP;
for (nla = TAILQ_FIRST(listen_addrs); nla != NULL; nla = next) {
next = TAILQ_NEXT(nla, entry);
TAILQ_FOREACH(ola, xconf->listen_addrs, entry)
if (!memcmp(&nla->sa, &ola->sa,
sizeof(nla->sa)))
break;
if (ola == NULL) {
/* new listener, copy over */
TAILQ_REMOVE(listen_addrs, nla, entry);
TAILQ_INSERT_TAIL(xconf->listen_addrs,
nla, entry);
nla->reconf = RECONF_REINIT;
} else /* exists, just flag */
ola->reconf = RECONF_KEEP;
}
for (nla = TAILQ_FIRST(xconf->listen_addrs); nla != NULL;
nla = next) {
next = TAILQ_NEXT(nla, entry);
if (nla->reconf == RECONF_DELETE) {
TAILQ_REMOVE(xconf->listen_addrs, nla, entry);
free(nla);
}
}
while ((ola = TAILQ_FIRST(listen_addrs)) != NULL) {
TAILQ_REMOVE(listen_addrs, ola, entry);
free(ola);
}
free(listen_addrs);
}
return (0);
}
