*: add BFD profile support for IS-IS

BFD profiles can now be used on the interface level like this:

	interface eth1
	  ip router isis 1
          isis bfd
          isis bfd profile default

Here the 'default' profile needs to be specified as usual in the
bfdd configuration.

Signed-off-by: GalaxyGorilla <sascha@netdef.org>

15 files changed, 153 insertions, 44 deletions

diff --git a/bgpd/bgp_bfd.c b/bgpd/bgp_bfd.c
index 54970af67b..c8de575f7f 100644
--- a/bgpd/bgp_bfd.c
+++ b/bgpd/bgp_bfd.c
@@ -487,7 +487,7 @@ static int bgp_bfd_peer_param_set(struct peer *peer, uint32_t min_rx,
 	int command = 0;
 
 	bfd_set_param((struct bfd_info **)&(peer->bfd_info), min_rx, min_tx,
-		      detect_mult, defaults, &command);
+		      detect_mult, NULL, defaults, &command);
 
 	/* This command overrides profile if it was previously applied. */
 	bi = peer->bfd_info;
@@ -498,8 +498,8 @@ static int bgp_bfd_peer_param_set(struct peer *peer, uint32_t min_rx,
 		for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
 			command = 0;
 			bfd_set_param((struct bfd_info **)&(peer->bfd_info),
-				      min_rx, min_tx, detect_mult, defaults,
-				      &command);
+				      min_rx, min_tx, detect_mult, NULL,
+				      defaults, &command);
 
 			/*
 			 * This command overrides profile if it was previously
@@ -565,7 +565,7 @@ static int bgp_bfd_peer_param_type_set(struct peer *peer,
 	if (!peer->bfd_info)
 		bfd_set_param((struct bfd_info **)&(peer->bfd_info),
 			      BFD_DEF_MIN_RX, BFD_DEF_MIN_TX,
-			      BFD_DEF_DETECT_MULT, 1, &command);
+			      BFD_DEF_DETECT_MULT, NULL, 1, &command);
 
 	bfd_info = (struct bfd_info *)peer->bfd_info;
 	bfd_info->type = type;
@@ -578,7 +578,7 @@ static int bgp_bfd_peer_param_type_set(struct peer *peer,
 				bfd_set_param(
 					(struct bfd_info **)&(peer->bfd_info),
 					BFD_DEF_MIN_RX, BFD_DEF_MIN_TX,
-					BFD_DEF_DETECT_MULT, 1, &command);
+					BFD_DEF_DETECT_MULT, NULL, 1, &command);
 
 			bfd_info = (struct bfd_info *)peer->bfd_info;
 			bfd_info->type = type;
@@ -613,7 +613,7 @@ static int bgp_bfd_peer_set_profile(struct peer *peer, const char *profile)
 	struct bfd_info *bfd_info;
 
 	bfd_set_param((struct bfd_info **)&(peer->bfd_info), BFD_DEF_MIN_RX,
-		      BFD_DEF_MIN_TX, BFD_DEF_DETECT_MULT, 1, &command);
+		      BFD_DEF_MIN_TX, BFD_DEF_DETECT_MULT, NULL, 1, &command);
 
 	bfd_info = (struct bfd_info *)peer->bfd_info;
 
@@ -629,7 +629,7 @@ static int bgp_bfd_peer_set_profile(struct peer *peer, const char *profile)
 			command = 0;
 			bfd_set_param((struct bfd_info **)&(peer->bfd_info),
 				      BFD_DEF_MIN_RX, BFD_DEF_MIN_TX,
-				      BFD_DEF_DETECT_MULT, 1, &command);
+				      BFD_DEF_DETECT_MULT, NULL, 1, &command);
 
 			bfd_info = (struct bfd_info *)peer->bfd_info;
 
diff --git a/doc/user/bfd.rst b/doc/user/bfd.rst
index 618d90a85e..47792317ad 100644
--- a/doc/user/bfd.rst
+++ b/doc/user/bfd.rst
@@ -254,7 +254,7 @@ IS-IS BFD Configuration
 The following commands are available inside the interface configuration node.
 
 .. index:: isis bfd
-.. clicmd:: ip isis bfd
+.. clicmd:: isis bfd
 
    Listen for BFD events on peers created on the interface. Every time
    a new neighbor is found a BFD peer is created to monitor the link
@@ -269,6 +269,15 @@ The following commands are available inside the interface configuration node.
    IPv4 and IPv6 support are configured then just a IPv6 based session is
    created.
 
+.. index:: isis bfd profile BFDPROF
+.. clicmd:: isis bfd profile BFDPROF
+
+   Use a BFD profile BFDPROF as provided in the BFD configuration.
+
+.. index:: no isis bfd profile BFDPROF
+.. clicmd:: no isis bfd profile BFDPROF
+
+   Removes any BFD profile if present.
 
 .. _bfd-ospf-peer-config:
 
diff --git a/isisd/isis_bfd.c b/isisd/isis_bfd.c
index 69c971ee2c..4408c8bb8b 100644
--- a/isisd/isis_bfd.c
+++ b/isisd/isis_bfd.c
@@ -383,14 +383,14 @@ void isis_bfd_circuit_cmd(struct isis_circuit *circuit, int command)
 	}
 }
 
-void isis_bfd_circuit_param_set(struct isis_circuit *circuit,
-				uint32_t min_rx, uint32_t min_tx,
-				uint32_t detect_mult, int defaults)
+void isis_bfd_circuit_param_set(struct isis_circuit *circuit, uint32_t min_rx,
+				uint32_t min_tx, uint32_t detect_mult,
+				const char *profile, int defaults)
 {
 	int command = 0;
 
-	bfd_set_param(&circuit->bfd_info, min_rx,
-		      min_tx, detect_mult, defaults, &command);
+	bfd_set_param(&circuit->bfd_info, min_rx, min_tx, detect_mult, profile,
+		      defaults, &command);
 
 	if (command)
 		isis_bfd_circuit_cmd(circuit, command);
diff --git a/isisd/isis_bfd.h b/isisd/isis_bfd.h
index 3193f16061..6ce630688c 100644
--- a/isisd/isis_bfd.h
+++ b/isisd/isis_bfd.h
@@ -22,9 +22,9 @@
 struct isis_circuit;
 
 void isis_bfd_circuit_cmd(struct isis_circuit *circuit, int command);
-void isis_bfd_circuit_param_set(struct isis_circuit *circuit,
-				uint32_t min_rx, uint32_t min_tx,
-				uint32_t detect_mult, int defaults);
+void isis_bfd_circuit_param_set(struct isis_circuit *circuit, uint32_t min_rx,
+				uint32_t min_tx, uint32_t detect_mult,
+				const char *profile, int defaults);
 void isis_bfd_init(void);
 
 #endif
diff --git a/isisd/isis_cli.c b/isisd/isis_cli.c
index df69b1c7be..6ea3c5fb5c 100644
--- a/isisd/isis_cli.c
+++ b/isisd/isis_cli.c
@@ -330,8 +330,7 @@ void cli_show_ip_isis_ipv6(struct vty *vty, struct lyd_node *dnode,
 DEFPY(isis_bfd,
       isis_bfd_cmd,
       "[no] isis bfd",
-      NO_STR
-      PROTO_HELP
+      NO_STR PROTO_HELP
       "Enable BFD support\n")
 {
 	const struct lyd_node *dnode;
@@ -343,19 +342,53 @@ DEFPY(isis_bfd,
 		return CMD_SUCCESS;
 	}
 
-	nb_cli_enqueue_change(vty, "./frr-isisd:isis/bfd-monitoring",
+	nb_cli_enqueue_change(vty, "./frr-isisd:isis/bfd-monitoring/enabled",
 			      NB_OP_MODIFY, no ? "false" : "true");
 
 	return nb_cli_apply_changes(vty, NULL);
 }
 
+/*
+ * XPath: /frr-interface:lib/interface/frr-isisd:isis/bfd-monitoring/profile
+ */
+DEFPY(isis_bfd_profile,
+      isis_bfd_profile_cmd,
+      "[no] isis bfd profile WORD",
+      NO_STR PROTO_HELP
+      "Enable BFD support\n"
+      "Use a pre-configured profile\n"
+      "Profile name\n")
+{
+	const struct lyd_node *dnode;
+
+	dnode = yang_dnode_get(vty->candidate_config->dnode,
+			       "%s/frr-isisd:isis", VTY_CURR_XPATH);
+	if (dnode == NULL) {
+		vty_out(vty, "ISIS is not enabled on this circuit\n");
+		return CMD_SUCCESS;
+	}
+
+	nb_cli_enqueue_change(vty, "./frr-isisd:isis/bfd-monitoring/profile",
+			      NB_OP_MODIFY, no ? NULL : profile);
+
+	return nb_cli_apply_changes(vty, NULL);
+}
+
 void cli_show_ip_isis_bfd_monitoring(struct vty *vty, struct lyd_node *dnode,
 				     bool show_defaults)
 {
-	if (!yang_dnode_get_bool(dnode, NULL))
+	const char *profile;
+
+	if (!yang_dnode_get_bool(dnode, "./enabled"))
 		vty_out(vty, " no");
 
 	vty_out(vty, " isis bfd\n");
+
+	if (yang_dnode_exists(dnode, "./profile")) {
+		profile = yang_dnode_get_string(dnode, "./profile");
+		if (profile[0] != '\0')
+			vty_out(vty, " isis bfd profile %s\n", profile);
+	}
 }
 
 /*
@@ -2301,6 +2334,7 @@ void isis_cli_init(void)
 	install_element(INTERFACE_NODE, &ip6_router_isis_cmd);
 	install_element(INTERFACE_NODE, &no_ip_router_isis_cmd);
 	install_element(INTERFACE_NODE, &isis_bfd_cmd);
+	install_element(INTERFACE_NODE, &isis_bfd_profile_cmd);
 
 	install_element(ISIS_NODE, &net_cmd);
 
diff --git a/isisd/isis_nb.c b/isisd/isis_nb.c
index 1d842eb13b..2b8b02e3f1 100644
--- a/isisd/isis_nb.c
+++ b/isisd/isis_nb.c
@@ -574,11 +574,24 @@ const struct frr_yang_module_info frr_isisd_info = {
 		{
 			.xpath = "/frr-interface:lib/interface/frr-isisd:isis/bfd-monitoring",
 			.cbs = {
-				.modify = lib_interface_isis_bfd_monitoring_modify,
+				.apply_finish = lib_interface_isis_bfd_monitoring_apply_finish,
 				.cli_show = cli_show_ip_isis_bfd_monitoring,
 			}
 		},
 		{
+			.xpath = "/frr-interface:lib/interface/frr-isisd:isis/bfd-monitoring/enabled",
+			.cbs = {
+				.modify = lib_interface_isis_bfd_monitoring_enabled_modify,
+			}
+		},
+		{
+			.xpath = "/frr-interface:lib/interface/frr-isisd:isis/bfd-monitoring/profile",
+			.cbs = {
+				.modify = lib_interface_isis_bfd_monitoring_profile_modify,
+				.destroy = lib_interface_isis_bfd_monitoring_profile_destroy,
+			}
+		},
+		{
 			.xpath = "/frr-interface:lib/interface/frr-isisd:isis/csnp-interval",
 			.cbs = {
 				.cli_show = cli_show_ip_isis_csnp_interval,
diff --git a/isisd/isis_nb.h b/isisd/isis_nb.h
index e887b1a388..a9401bc86a 100644
--- a/isisd/isis_nb.h
+++ b/isisd/isis_nb.h
@@ -171,7 +171,14 @@ int lib_interface_isis_area_tag_modify(struct nb_cb_modify_args *args);
 int lib_interface_isis_ipv4_routing_modify(struct nb_cb_modify_args *args);
 int lib_interface_isis_ipv6_routing_modify(struct nb_cb_modify_args *args);
 int lib_interface_isis_circuit_type_modify(struct nb_cb_modify_args *args);
-int lib_interface_isis_bfd_monitoring_modify(struct nb_cb_modify_args *args);
+void lib_interface_isis_bfd_monitoring_apply_finish(
+	struct nb_cb_apply_finish_args *args);
+int lib_interface_isis_bfd_monitoring_enabled_modify(
+	struct nb_cb_modify_args *args);
+int lib_interface_isis_bfd_monitoring_profile_modify(
+	struct nb_cb_modify_args *args);
+int lib_interface_isis_bfd_monitoring_profile_destroy(
+	struct nb_cb_destroy_args *args);
 int isis_instance_segment_routing_enabled_modify(
 	struct nb_cb_modify_args *args);
 int isis_instance_segment_routing_enabled_modify(
diff --git a/isisd/isis_nb_config.c b/isisd/isis_nb_config.c
index c17433cb27..a7a70dff0a 100644
--- a/isisd/isis_nb_config.c
+++ b/isisd/isis_nb_config.c
@@ -2030,26 +2030,53 @@ int lib_interface_isis_ipv6_routing_modify(struct nb_cb_modify_args *args)
 /*
  * XPath: /frr-interface:lib/interface/frr-isisd:isis/bfd-monitoring
  */
-int lib_interface_isis_bfd_monitoring_modify(struct nb_cb_modify_args *args)
+void lib_interface_isis_bfd_monitoring_apply_finish(
+	struct nb_cb_apply_finish_args *args)
 {
 	struct isis_circuit *circuit;
-	bool bfd_monitoring;
-
-	if (args->event != NB_EV_APPLY)
-		return NB_OK;
+	bool enabled;
+	const char *profile = NULL;
 
 	circuit = nb_running_get_entry(args->dnode, NULL, true);
-	bfd_monitoring = yang_dnode_get_bool(args->dnode, NULL);
+	enabled = yang_dnode_get_bool(args->dnode, "./enabled");
+
+	if (yang_dnode_exists(args->dnode, "./profile"))
+		profile = yang_dnode_get_string(args->dnode, "./profile");
 
-	if (bfd_monitoring) {
+	if (enabled) {
 		isis_bfd_circuit_param_set(circuit, BFD_DEF_MIN_RX,
 					   BFD_DEF_MIN_TX, BFD_DEF_DETECT_MULT,
-					   true);
+					   profile, true);
 	} else {
 		isis_bfd_circuit_cmd(circuit, ZEBRA_BFD_DEST_DEREGISTER);
 		bfd_info_free(&circuit->bfd_info);
 	}
+}
+
+/*
+ * XPath: /frr-interface:lib/interface/frr-isisd:isis/bfd-monitoring/enabled
+ */
+int lib_interface_isis_bfd_monitoring_enabled_modify(
+	struct nb_cb_modify_args *args)
+{
+	/* Everything done in apply_finish */
+	return NB_OK;
+}
 
+/*
+ * XPath: /frr-interface:lib/interface/frr-isisd:isis/bfd-monitoring/profile
+ */
+int lib_interface_isis_bfd_monitoring_profile_modify(
+	struct nb_cb_modify_args *args)
+{
+	/* Everything done in apply_finish */
+	return NB_OK;
+}
+
+int lib_interface_isis_bfd_monitoring_profile_destroy(
+	struct nb_cb_destroy_args *args)
+{
+	/* Everything done in apply_finish */
 	return NB_OK;
 }
 
diff --git a/isisd/isis_vty_fabricd.c b/isisd/isis_vty_fabricd.c
index 09b8d28258..ffb17f9acf 100644
--- a/isisd/isis_vty_fabricd.c
+++ b/isisd/isis_vty_fabricd.c
@@ -316,8 +316,8 @@ DEFUN (isis_bfd,
 		return CMD_SUCCESS;
 	}
 
-	isis_bfd_circuit_param_set(circuit, BFD_DEF_MIN_RX,
-				   BFD_DEF_MIN_TX, BFD_DEF_DETECT_MULT, true);
+	isis_bfd_circuit_param_set(circuit, BFD_DEF_MIN_RX, BFD_DEF_MIN_TX,
+				   BFD_DEF_DETECT_MULT, NULL, true);
 
 	return CMD_SUCCESS;
 }
diff --git a/lib/bfd.c b/lib/bfd.c
index 7c84648d91..d2bcb5b8aa 100644
--- a/lib/bfd.c
+++ b/lib/bfd.c
@@ -94,7 +94,8 @@ int bfd_validate_param(struct vty *vty, const char *dm_str, const char *rx_str,
  * bfd_set_param - Set the configured BFD paramter values
  */
 void bfd_set_param(struct bfd_info **bfd_info, uint32_t min_rx, uint32_t min_tx,
-		   uint8_t detect_mult, int defaults, int *command)
+		   uint8_t detect_mult, const char *profile, int defaults,
+		   int *command)
 {
 	if (!*bfd_info) {
 		*bfd_info = bfd_info_create();
@@ -102,7 +103,8 @@ void bfd_set_param(struct bfd_info **bfd_info, uint32_t min_rx, uint32_t min_tx,
 	} else {
 		if (((*bfd_info)->required_min_rx != min_rx)
 		    || ((*bfd_info)->desired_min_tx != min_tx)
-		    || ((*bfd_info)->detect_mult != detect_mult))
+		    || ((*bfd_info)->detect_mult != detect_mult)
+		    || (profile && strcmp((*bfd_info)->profile, profile)))
 			*command = ZEBRA_BFD_DEST_UPDATE;
 	}
 
@@ -110,6 +112,11 @@ void bfd_set_param(struct bfd_info **bfd_info, uint32_t min_rx, uint32_t min_tx,
 		(*bfd_info)->required_min_rx = min_rx;
 		(*bfd_info)->desired_min_tx = min_tx;
 		(*bfd_info)->detect_mult = detect_mult;
+		if (profile)
+			strlcpy((*bfd_info)->profile, profile,
+				BFD_PROFILE_NAME_LEN);
+		else
+			(*bfd_info)->profile[0] = '\0';
 	}
 
 	if (!defaults)
@@ -162,6 +169,11 @@ void bfd_peer_sendmsg(struct zclient *zclient, struct bfd_info *bfd_info,
 		args.min_rx = bfd_info->required_min_rx;
 		args.min_tx = bfd_info->desired_min_tx;
 		args.detection_multiplier = bfd_info->detect_mult;
+		if (bfd_info->profile[0]) {
+			args.profilelen = strlen(bfd_info->profile);
+			strlcpy(args.profile, bfd_info->profile,
+				sizeof(args.profile));
+		}
 	}
 
 	addrlen = family == AF_INET ? sizeof(struct in_addr)
diff --git a/lib/bfd.h b/lib/bfd.h
index d7d4b5fe35..ceab4628b6 100644
--- a/lib/bfd.h
+++ b/lib/bfd.h
@@ -92,8 +92,8 @@ extern int bfd_validate_param(struct vty *vty, const char *dm_str,
 			      uint32_t *tx_val);
 
 extern void bfd_set_param(struct bfd_info **bfd_info, uint32_t min_rx,
-			  uint32_t min_tx, uint8_t detect_mult, int defaults,
-			  int *command);
+			  uint32_t min_tx, uint8_t detect_mult,
+			  const char *profile, int defaults, int *command);
 extern void bfd_peer_sendmsg(struct zclient *zclient, struct bfd_info *bfd_info,
 			     int family, void *dst_ip, void *src_ip,
 			     char *if_name, int ttl, int multihop, int cbit,
diff --git a/ospf6d/ospf6_bfd.c b/ospf6d/ospf6_bfd.c
index 4e7a0050aa..916e59baf0 100644
--- a/ospf6d/ospf6_bfd.c
+++ b/ospf6d/ospf6_bfd.c
@@ -308,7 +308,7 @@ static void ospf6_bfd_if_param_set(struct ospf6_interface *oi, uint32_t min_rx,
 	int command = 0;
 
 	bfd_set_param((struct bfd_info **)&(oi->bfd_info), min_rx, min_tx,
-		      detect_mult, defaults, &command);
+		      detect_mult, NULL, defaults, &command);
 	if (command)
 		ospf6_bfd_reg_dereg_all_nbr(oi, command);
 }
diff --git a/ospfd/ospf_bfd.c b/ospfd/ospf_bfd.c
index b9e78f4cd3..d2c5090f2f 100644
--- a/ospfd/ospf_bfd.c
+++ b/ospfd/ospf_bfd.c
@@ -381,7 +381,7 @@ static void ospf_bfd_if_param_set(struct interface *ifp, uint32_t min_rx,
 	params = IF_DEF_PARAMS(ifp);
 
 	bfd_set_param((struct bfd_info **)&(params->bfd_info), min_rx, min_tx,
-		      detect_mult, defaults, &command);
+		      detect_mult, NULL, defaults, &command);
 	if (command)
 		ospf_bfd_reg_dereg_all_nbr(ifp, command);
 }
diff --git a/pimd/pim_bfd.c b/pimd/pim_bfd.c
index 0df8ea6922..146b53fa8f 100644
--- a/pimd/pim_bfd.c
+++ b/pimd/pim_bfd.c
@@ -194,7 +194,7 @@ void pim_bfd_if_param_set(struct interface *ifp, uint32_t min_rx,
 
 	if (!pim_ifp)
 		return;
-	bfd_set_param(&(pim_ifp->bfd_info), min_rx, min_tx, detect_mult,
+	bfd_set_param(&(pim_ifp->bfd_info), min_rx, min_tx, detect_mult, NULL,
 		      defaults, &command);
 
 	if (pim_ifp->bfd_info) {
diff --git a/yang/frr-isisd.yang b/yang/frr-isisd.yang
index befdc3467d..1bb693a1ef 100644
--- a/yang/frr-isisd.yang
+++ b/yang/frr-isisd.yang
@@ -361,11 +361,18 @@ module frr-isisd {
         "IS-type of this circuit.";
     }
 
-    leaf bfd-monitoring {
-      type boolean;
-      default "false";
-      description
-        "Monitor IS-IS peers on this circuit.";
+    container bfd-monitoring {
+      leaf enabled {
+        type boolean;
+        default "false";
+        description
+          "Monitor IS-IS peers on this circuit.";
+      }
+      leaf profile {
+        type string;
+        description
+          "Let BFD use a pre-configured profile.";
+      }
     }
 
     container csnp-interval {