pimd: add support for boundaries

Adds the ability to filter PIM Joins & IGMP reports on an interface.
Enabling a multicast boundary on an interface for a particular group
will prevent the interface from appearing in the group's OIL.

Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/pimd/pim_cmd.c b/pimd/pim_cmd.c
index 396b949e4f..1ebe9c9aba 100644
--- a/pimd/pim_cmd.c
+++ b/pimd/pim_cmd.c
@@ -6462,6 +6462,58 @@ DEFUN (interface_no_ip_pim_sm,
 	return CMD_SUCCESS;
 }
 
+/* boundaries */
+DEFUN(interface_ip_pim_boundary_oil,
+      interface_ip_pim_boundary_oil_cmd,
+      "ip multicast boundary oil WORD",
+      IP_STR
+      "Generic multicast configuration options\n"
+      "Define multicast boundary\n"
+      "Filter OIL by group using prefix list\n"
+      "Prefix list to filter OIL with")
+{
+	VTY_DECLVAR_CONTEXT(interface, iif);
+	struct pim_interface *pim_ifp;
+	int idx = 0;
+
+	argv_find(argv, argc, "WORD", &idx);
+
+	PIM_GET_PIM_INTERFACE(pim_ifp, iif);
+
+	if (pim_ifp->boundary_oil_plist)
+		XFREE(MTYPE_PIM_INTERFACE, pim_ifp->boundary_oil_plist);
+
+	pim_ifp->boundary_oil_plist =
+		XSTRDUP(MTYPE_PIM_INTERFACE, argv[idx]->arg);
+
+	/* Interface will be pruned from OIL on next Join */
+	return CMD_SUCCESS;
+}
+
+DEFUN(interface_no_ip_pim_boundary_oil,
+      interface_no_ip_pim_boundary_oil_cmd,
+      "no ip multicast boundary oil [WORD]",
+      NO_STR
+      IP_STR
+      "Generic multicast configuration options\n"
+      "Define multicast boundary\n"
+      "Filter OIL by group using prefix list\n"
+      "Prefix list to filter OIL with")
+{
+	VTY_DECLVAR_CONTEXT(interface, iif);
+	struct pim_interface *pim_ifp;
+	int idx;
+
+	argv_find(argv, argc, "WORD", &idx);
+
+	PIM_GET_PIM_INTERFACE(pim_ifp, iif);
+
+	if (pim_ifp->boundary_oil_plist)
+		XFREE(MTYPE_PIM_INTERFACE, pim_ifp->boundary_oil_plist);
+
+	return CMD_SUCCESS;
+}
+
 DEFUN (interface_ip_mroute,
        interface_ip_mroute_cmd,
        "ip mroute INTERFACE A.B.C.D",
@@ -8564,6 +8616,8 @@ void pim_cmd_init(void)
 	install_element(INTERFACE_NODE, &interface_no_ip_pim_drprio_cmd);
 	install_element(INTERFACE_NODE, &interface_ip_pim_hello_cmd);
 	install_element(INTERFACE_NODE, &interface_no_ip_pim_hello_cmd);
+	install_element(INTERFACE_NODE, &interface_ip_pim_boundary_oil_cmd);
+	install_element(INTERFACE_NODE, &interface_no_ip_pim_boundary_oil_cmd);
 
 	// Static mroutes NEB
 	install_element(INTERFACE_NODE, &interface_ip_mroute_cmd);