diff options
Diffstat (limited to 'pimd/pim_util.c')
| -rw-r--r-- | pimd/pim_util.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/pimd/pim_util.c b/pimd/pim_util.c index 657e84ae50..49ae6949a2 100644 --- a/pimd/pim_util.c +++ b/pimd/pim_util.c @@ -126,6 +126,47 @@ int pim_is_group_224_4(struct in_addr group_addr) return prefix_match(&group_all, &group); } +static bool pim_cisco_match(const struct filter *filter, const struct in_addr *source, + const struct in_addr *group) +{ + const struct filter_cisco *cfilter = &filter->u.cfilter; + uint32_t source_addr; + uint32_t group_addr; + + group_addr = group->s_addr & ~cfilter->mask_mask.s_addr; + + if (cfilter->extended) { + source_addr = source->s_addr & ~cfilter->addr_mask.s_addr; + if (group_addr == cfilter->mask.s_addr && source_addr == cfilter->addr.s_addr) + return true; + } else if (group_addr == cfilter->addr.s_addr) + return true; + + return false; +} + +enum filter_type pim_access_list_apply(struct access_list *access, const struct in_addr *source, + const struct in_addr *group) +{ + struct filter *filter; + struct prefix group_prefix = {}; + + if (access == NULL) + return FILTER_DENY; + + for (filter = access->head; filter; filter = filter->next) { + if (filter->cisco) { + if (pim_cisco_match(filter, source, group)) + return filter->type; + } + } + + group_prefix.family = AF_INET; + group_prefix.prefixlen = IPV4_MAX_BITLEN; + group_prefix.u.prefix4.s_addr = group->s_addr; + return access_list_apply(access, &group_prefix); +} + bool pim_is_group_filtered(struct pim_interface *pim_ifp, pim_addr *grp) { struct prefix grp_pfx; |