/* Unset distribute-list. If matched distribute-list exist then
return 1. */
static int
distribute_list_prefix_unset (const char *ifname, enum distribute_type type,
const char *plist_name)
{
struct distribute *dist;
dist = distribute_lookup (ifname);
if (!dist)
return 0;
if (!dist->prefix[type])
return 0;
if (strcmp (dist->prefix[type], plist_name) != 0)
return 0;
free (dist->prefix[type]);
dist->prefix[type] = NULL;
/* Apply this distribute-list to the interface. */
(*distribute_delete_hook) (dist);
/* If all dist are NULL, then free distribute list. */
distribute_free_if_empty(dist);
return 1;
}
/* Unset distribute-list. If matched distribute-list exist then
return 1. */
static int
distribute_list_prefix_unset (const char *ifname, enum distribute_type type,
const char *plist_name)
{
struct distribute *dist;
dist = distribute_lookup (ifname);
if (!dist)
return 0;
if (type == DISTRIBUTE_IN)
{
if (!dist->prefix[DISTRIBUTE_IN])
return 0;
if (strcmp (dist->prefix[DISTRIBUTE_IN], plist_name) != 0)
return 0;
free (dist->prefix[DISTRIBUTE_IN]);
dist->prefix[DISTRIBUTE_IN] = NULL;
}
if (type == DISTRIBUTE_OUT)
{
if (!dist->prefix[DISTRIBUTE_OUT])
return 0;
if (strcmp (dist->prefix[DISTRIBUTE_OUT], plist_name) != 0)
return 0;
free (dist->prefix[DISTRIBUTE_OUT]);
dist->prefix[DISTRIBUTE_OUT] = NULL;
}
/* Apply this distribute-list to the interface. */
(*distribute_delete_hook) (dist);
/* If both out and in is NULL then free distribute list. */
if (dist->list[DISTRIBUTE_IN] == NULL &&
dist->list[DISTRIBUTE_OUT] == NULL &&
dist->prefix[DISTRIBUTE_IN] == NULL &&
dist->prefix[DISTRIBUTE_OUT] == NULL)
{
hash_release (disthash, dist);
distribute_free (dist);
}
return 1;
}
int
babel_filter(int output, const unsigned char *prefix, unsigned short plen,
unsigned int ifindex)
{
struct interface *ifp = if_lookup_by_index(ifindex);
babel_interface_nfo *babel_ifp = ifp ? babel_get_if_nfo(ifp) : NULL;
struct prefix p;
struct distribute *dist;
struct access_list *alist;
struct prefix_list *plist;
int filter = output ? BABEL_FILTER_OUT : BABEL_FILTER_IN;
int distribute = output ? DISTRIBUTE_OUT : DISTRIBUTE_IN;
p.family = v4mapped(prefix) ? AF_INET : AF_INET6;
p.prefixlen = v4mapped(prefix) ? plen - 96 : plen;
if (p.family == AF_INET)
uchar_to_inaddr(&p.u.prefix4, prefix);
#ifdef HAVE_IPV6
else
uchar_to_in6addr(&p.u.prefix6, prefix);
#endif
if (babel_ifp != NULL && babel_ifp->list[filter]) {
if (access_list_apply (babel_ifp->list[filter], &p)
== FILTER_DENY) {
debugf(BABEL_DEBUG_FILTER,
"%s/%d filtered by distribute in",
#ifdef HAVE_IPV6
p.family == AF_INET ?
inet_ntoa(p.u.prefix4) :
inet6_ntoa (p.u.prefix6),
#else
inet_ntoa(p.u.prefix4),
#endif
p.prefixlen);
return INFINITY;
}
}
if (babel_ifp != NULL && babel_ifp->prefix[filter]) {
if (prefix_list_apply (babel_ifp->prefix[filter], &p)
== PREFIX_DENY) {
debugf(BABEL_DEBUG_FILTER, "%s/%d filtered by distribute in",
#ifdef HAVE_IPV6
p.family == AF_INET ?
inet_ntoa(p.u.prefix4) :
inet6_ntoa (p.u.prefix6),
#else
inet_ntoa(p.u.prefix4),
#endif
p.prefixlen);
return INFINITY;
}
}
/* All interface filter check. */
dist = distribute_lookup (NULL);
if (dist) {
if (dist->list[distribute]) {
alist = access_list_lookup (AFI_IP6, dist->list[distribute]);
if (alist) {
if (access_list_apply (alist, &p) == FILTER_DENY) {
debugf(BABEL_DEBUG_FILTER, "%s/%d filtered by distribute in",
#ifdef HAVE_IPV6
p.family == AF_INET ?
inet_ntoa(p.u.prefix4) :
inet6_ntoa (p.u.prefix6),
#else
inet_ntoa(p.u.prefix4),
#endif
p.prefixlen);
return INFINITY;
}
}
}
if (dist->prefix[distribute]) {
plist = prefix_list_lookup (AFI_IP6, dist->prefix[distribute]);
if (plist) {
if (prefix_list_apply (plist, &p) == PREFIX_DENY) {
debugf(BABEL_DEBUG_FILTER, "%s/%d filtered by distribute in",
#ifdef HAVE_IPV6
p.family == AF_INET ?
inet_ntoa(p.u.prefix4) :
inet6_ntoa (p.u.prefix6),
#else
inet_ntoa(p.u.prefix4),
#endif
p.prefixlen);
return INFINITY;
}
}
}
}
return 0;
}
