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pimd: Allow pim to work in vrf's without explicitly configuring the vrf device

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Under vrf's pim needs to have a socket listening for pim packets on the vrf
device so that we can actually get the packets.  As such when we configure
up a vrf interface, configure just enough to allow it to listen on the
device and to do the right thing.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This commit is contained in:
Donald Sharp 2017-06-14 13:11:35 -04:00
parent 2aa1ca8418
commit 90133de64c
3 changed files with 32 additions and 0 deletions
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13
pimd/pim_iface.c
View File

@ -1593,3 +1593,16 @@ int pim_if_is_loopback(struct pim_instance *pim, struct interface *ifp)
return 0;
}
int pim_if_is_vrf_device(struct interface *ifp)
{
struct vrf *vrf;
RB_FOREACH(vrf, vrf_name_head, &vrfs_by_name)
{
if (strncmp(ifp->name, vrf->name, strlen(ifp->name)) == 0)
return 1;
}
return 0;
}

2
pimd/pim_iface.h
View File

@ -206,4 +206,6 @@ int pim_if_connected_to_source(struct interface *ifp, struct in_addr src);
int pim_update_source_set(struct interface *ifp, struct in_addr source);
int pim_if_is_loopback(struct pim_instance *pim, struct interface *ifp);
int pim_if_is_vrf_device(struct interface *ifp);
#endif /* PIM_IFACE_H */

17
pimd/pim_zebra.c
View File

@ -89,6 +89,23 @@ static int pim_zebra_if_add(int command, struct zclient *zclient,
if (if_is_operative(ifp))
pim_if_addr_add_all(ifp);
/*
* If we are a vrf device that is up, open up the pim_socket for
* listening
* to incoming pim messages irrelevant if the user has configured us
* for pim or not.
*/
if (pim_if_is_vrf_device(ifp)) {
struct pim_interface *pim_ifp;
if (!ifp->info) {
pim_ifp = pim_if_new(ifp, 0, 0);
ifp->info = pim_ifp;
}
pim_sock_add(ifp);
}
return 0;
}