proxmox-mirrors/mirror_frr
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_frr synced 2025-04-28 15:36:25 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

pimd: correct prefix-list ssm range update for exclude mode

Browse Source 
Modifying the code as per RFC 4604 section 2.2.1
EXCLUDE mode does not apply to SSM addresses, and an SSM-aware router
will ignore MODE_IS_EXCLUDE and CHANGE_TO_EXCLUDE_MODE requests in
the SSM range.

Issue is observed when a group in exclude mode was in ASM range
as per the prefix-list and then prefix-list is modified to make
it fall under SSM range. The (*,G) entry remains there.

So when the group moves to ssm range and it is exclude mode,
delete the group from the IGMP table.

Co-authored-by: Vishal Dhingra <rac.vishaldhingra@gmail.com>
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
This commit is contained in:
Mobashshera Rasool 2022-03-22 10:48:01 -07:00
parent 2d07728e79
commit 6d0a6ede82
1 changed files with 21 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
pimd/pim_igmp.c
View File

@ -131,12 +131,27 @@ void igmp_source_forward_reevaluate_all(struct pim_instance *pim)
struct listnode *srcnode;
struct gm_source *src;
/* scan group sources */
for (ALL_LIST_ELEMENTS_RO(grp->group_source_list,
srcnode, src)) {
igmp_source_forward_reevaluate_one(pim, src);
} /* scan group sources */
} /* scan igmp groups */
/*
* RFC 4604
* section 2.2.1
* EXCLUDE mode does not apply to SSM addresses,
* and an SSM-aware router will ignore
* MODE_IS_EXCLUDE and CHANGE_TO_EXCLUDE_MODE
* requests in the SSM range.
*/
if (pim_is_grp_ssm(pim, grp->group_addr) &&
grp->group_filtermode_isexcl) {
igmp_group_delete(grp);
} else {
/* scan group sources */
for (ALL_LIST_ELEMENTS_RO(
grp->group_source_list, srcnode,
src)) {
igmp_source_forward_reevaluate_one(pim,
src);
} /* scan group sources */
}
} /* scan igmp groups */
RB_FOREACH_SAFE (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb,
ch_temp) {