staticd: Add support for SRv6 Static SIDs

doc/user/static.rst

@@ -176,3 +176,52 @@ multiple segments instructions.
   router# show ipv6 route
   [..]
   S>* 2005::/64 [1/0] is directly connected, ens3, seg6 2001:db8:aaaa::7,2002::4,2002::3,2002::2, weight 1, 00:00:06
+
+SRv6 Static SIDs Commands
+=========================
+
+.. clicmd:: segment-routing
+
+   Move from configure mode to segment-routing node.
+
+.. clicmd:: srv6
+
+   Move from segment-routing node to srv6 node.
+
+.. clicmd:: static-sids
+
+   Move from srv6 node to static-sids node. In this static-sids node, user can
+   configure static SRv6 SIDs.
+
+.. clicmd:: sid X:X::X:X/M locator NAME behavior <uN|uDT4|uDT6|uDT46> [vrf VRF]
+
+   Specify the locator sid manually. Configuring a local sid in a purely static mode
+   by specifying the sid value would generate a unique SID.
+   This feature will support the configuration of static SRv6 decapsulation on the system.
+
+   It supports four parameter options, corresponding to the following functions:
+   uN, uDT4, uDT6, uDT46
+
+   When configuring the local sid, if the action is set to 'uN', no vrf should be set.
+   While for any other action, it is necessary to specify a specific vrf.
+
+::
+
+   router# configure terminal
+   router(config)# segment-routing
+   router(config-sr)# srv6
+   router(config-srv6)# static-sids
+   router(config-srv6-sids)# sid fcbb:bbbb:1:fe01::/64 locator LOC1 behavior uDT6 vrf Vrf1
+   router(config-srv6-sids)# sid fcbb:bbbb:1:fe02::/64 locator LOC1 behavior uDT4 vrf Vrf1
+   router(config-srv6-sids)# sid fcbb:bbbb:1:fe03::/64 locator LOC1 behavior uDT46 vrf Vrf2
+
+   router(config-srv6-locator)# show run
+   ...
+   segment-routing
+    srv6
+     static-sids
+      sid    fcbb:bbbb:1:fe01::/64 locator LOC1 behavior uDT6 vrf Vrf1
+      sid    fcbb:bbbb:1:fe02::/64 locator LOC1 behavior uDT4 vrf Vrf1
+      sid    fcbb:bbbb:1:fe03::/64 locator LOC1 behavior uDT46 vrf Vrf2
+       !
+   ...

isisd/isis_srv6.c

@@ -698,7 +698,7 @@ void isis_srv6_area_init(struct isis_area *area)
 	srv6db->config.max_end_pop_msd = ISIS_DEFAULT_SRV6_MAX_END_POP_MSD;
 	srv6db->config.max_h_encaps_msd = ISIS_DEFAULT_SRV6_MAX_H_ENCAPS_MSD;
 	srv6db->config.max_end_d_msd = ISIS_DEFAULT_SRV6_MAX_END_D_MSD;
-	strlcpy(srv6db->config.srv6_ifname, ISIS_DEFAULT_SRV6_IFNAME, sizeof(srv6db->config.srv6_ifname));
+	strlcpy(srv6db->config.srv6_ifname, DEFAULT_SRV6_IFNAME, sizeof(srv6db->config.srv6_ifname));
 #endif
 
 	/* Initialize SRv6 Locator chunks list */

isisd/isis_srv6.h

@@ -16,8 +16,7 @@
 #define ISIS_DEFAULT_SRV6_MAX_SEG_LEFT_MSD        3
 #define ISIS_DEFAULT_SRV6_MAX_END_POP_MSD         3
 #define ISIS_DEFAULT_SRV6_MAX_H_ENCAPS_MSD        2
-#define ISIS_DEFAULT_SRV6_MAX_END_D_MSD           5
-#define ISIS_DEFAULT_SRV6_IFNAME                 "sr0"
+#define ISIS_DEFAULT_SRV6_MAX_END_D_MSD		  5
 
 /* SRv6 SID structure */
 struct isis_srv6_sid_structure {

lib/command.h

@@ -154,6 +154,7 @@ enum node_type {
 	PCEP_PCE_NODE,		 /* PCE configuration node */
 	PCEP_PCC_NODE,		 /* PCC configuration node */
 	SRV6_NODE,		 /* SRv6 node */
+	SRV6_SIDS_NODE,		 /* SRv6 SIDs node */
 	SRV6_LOCS_NODE,		 /* SRv6 locators node */
 	SRV6_LOC_NODE,		 /* SRv6 locator node */
 	SRV6_ENCAP_NODE,		 /* SRv6 encapsulation node */

lib/srv6.h

@@ -22,6 +22,8 @@
 
 #define SRV6_SID_FORMAT_NAME_SIZE 512
 
+#define DEFAULT_SRV6_IFNAME "sr0"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -186,6 +188,42 @@ enum srv6_endpoint_behavior_codepoint {
 	SRV6_ENDPOINT_BEHAVIOR_OPAQUE           = 0xFFFF,
 };
 
+/*
+ * Convert SRv6 endpoint behavior codepoints to human-friendly string.
+ */
+static inline const char *
+srv6_endpoint_behavior_codepoint2str(enum srv6_endpoint_behavior_codepoint behavior)
+{
+	switch (behavior) {
+	case SRV6_ENDPOINT_BEHAVIOR_RESERVED:
+		return "Reserved";
+	case SRV6_ENDPOINT_BEHAVIOR_END:
+		return "End";
+	case SRV6_ENDPOINT_BEHAVIOR_END_X:
+		return "End.X";
+	case SRV6_ENDPOINT_BEHAVIOR_END_DT6:
+		return "End.DT6";
+	case SRV6_ENDPOINT_BEHAVIOR_END_DT4:
+		return "End.DT4";
+	case SRV6_ENDPOINT_BEHAVIOR_END_DT46:
+		return "End.DT46";
+	case SRV6_ENDPOINT_BEHAVIOR_END_NEXT_CSID:
+		return "uN";
+	case SRV6_ENDPOINT_BEHAVIOR_END_X_NEXT_CSID:
+		return "uA";
+	case SRV6_ENDPOINT_BEHAVIOR_END_DT6_USID:
+		return "uDT6";
+	case SRV6_ENDPOINT_BEHAVIOR_END_DT4_USID:
+		return "uDT4";
+	case SRV6_ENDPOINT_BEHAVIOR_END_DT46_USID:
+		return "uDT46";
+	case SRV6_ENDPOINT_BEHAVIOR_OPAQUE:
+		return "Opaque";
+	}
+
+	return "Unspec";
+}
+
 struct nexthop_srv6 {
 	/* SRv6 localsid info for Endpoint-behaviour */
 	enum seg6local_action_t seg6local_action;

staticd/static_debug.c

@@ -22,6 +22,7 @@
 struct debug static_dbg_events = {0, "debug static events", "Staticd events"};
 struct debug static_dbg_route = {0, "debug static route", "Staticd route"};
 struct debug static_dbg_bfd = {0, "debug static bfd", "Staticd bfd"};
+struct debug static_dbg_srv6 = {0, "debug static srv6", "Staticd srv6"};
 /* clang-format on */
 
 /*
@@ -37,8 +38,7 @@ struct debug static_dbg_bfd = {0, "debug static bfd", "Staticd bfd"};
  *    Debug general internal events
  *
  */
-void static_debug_set(int vtynode, bool onoff, bool events, bool route,
-		      bool bfd)
+void static_debug_set(int vtynode, bool onoff, bool events, bool route, bool bfd, bool srv6)
 {
 	uint32_t mode = DEBUG_NODE2MODE(vtynode);
 
@@ -50,6 +50,8 @@ void static_debug_set(int vtynode, bool onoff, bool events, bool route,
 		DEBUG_MODE_SET(&static_dbg_bfd, mode, onoff);
 		bfd_protocol_integration_set_debug(onoff);
 	}
+	if (srv6)
+		DEBUG_MODE_SET(&static_dbg_srv6, mode, onoff);
 }
 
 /*
@@ -61,4 +63,5 @@ void static_debug_init(void)
 	debug_install(&static_dbg_events);
 	debug_install(&static_dbg_route);
 	debug_install(&static_dbg_bfd);
+	debug_install(&static_dbg_srv6);
 }

staticd/static_debug.h

@@ -20,6 +20,7 @@ extern "C" {
 extern struct debug static_dbg_events;
 extern struct debug static_dbg_route;
 extern struct debug static_dbg_bfd;
+extern struct debug static_dbg_srv6;
 
 /*
  * Initialize staticd debugging.
@@ -41,8 +42,7 @@ void static_debug_init(void);
  *    Debug general internal events
  *
  */
-void static_debug_set(int vtynode, bool onoff, bool events, bool route,
-		      bool bfd);
+void static_debug_set(int vtynode, bool onoff, bool events, bool route, bool bfd, bool srv6);
 
 #ifdef __cplusplus
 }

staticd/static_main.c

@@ -26,6 +26,7 @@
 #include "static_zebra.h"
 #include "static_debug.h"
 #include "static_nb.h"
+#include "static_srv6.h"
 
 #include "mgmt_be_client.h"
 
@@ -76,6 +77,10 @@ static void sigint(void)
 	static_vrf_terminate();
 
 	static_zebra_stop();
+
+	/* clean up SRv6 data structures */
+	static_srv6_cleanup();
+
 	frr_fini();
 
 	exit(0);
@@ -161,6 +166,9 @@ int main(int argc, char **argv, char **envp)
 	static_debug_init();
 	static_vrf_init();
 
+	/* initialize SRv6 data structures */
+	static_srv6_init();
+
 	static_zebra_init();
 	static_vty_init();
 

staticd/static_nb.c

@@ -224,6 +224,35 @@ const struct frr_yang_module_info frr_staticd_info = {
 				.destroy = routing_control_plane_protocols_control_plane_protocol_staticd_route_list_src_list_path_list_frr_nexthops_nexthop_mpls_label_stack_entry_traffic_class_destroy,
 			}
 		},
+		{
+			.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-staticd:staticd/segment-routing/srv6/static-sids/sid",
+			.cbs = {
+				.apply_finish = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_apply_finish,
+				.create = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_create,
+				.destroy = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_destroy,
+			}
+		},
+		{
+			.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-staticd:staticd/segment-routing/srv6/static-sids/sid/behavior",
+			.cbs = {
+				.modify = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_behavior_modify,
+				.destroy = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_behavior_destroy,
+			}
+		},
+		{
+			.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-staticd:staticd/segment-routing/srv6/static-sids/sid/vrf-name",
+			.cbs = {
+				.modify = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_vrf_name_modify,
+				.destroy = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_vrf_name_destroy,
+			}
+		},
+		{
+			.xpath = "/frr-routing:routing/control-plane-protocols/control-plane-protocol/frr-staticd:staticd/segment-routing/srv6/static-sids/sid/locator-name",
+			.cbs = {
+				.modify = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_locator_name_modify,
+				.destroy = routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_locator_name_destroy,
+			}
+		},
 		{
 			.xpath = NULL,
 		},

staticd/static_nb.h

@@ -118,13 +118,43 @@ int routing_control_plane_protocols_control_plane_protocol_staticd_route_list_sr
 	struct nb_cb_modify_args *args);
 int routing_control_plane_protocols_control_plane_protocol_staticd_route_list_src_list_path_list_frr_nexthops_nexthop_mpls_label_stack_entry_traffic_class_destroy(
 	struct nb_cb_destroy_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_create(
+	struct nb_cb_create_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_destroy(
+	struct nb_cb_destroy_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_create(
+	struct nb_cb_create_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_destroy(
+	struct nb_cb_destroy_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_create(
+	struct nb_cb_create_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_destroy(
+	struct nb_cb_destroy_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_create(
+	struct nb_cb_create_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_destroy(
+	struct nb_cb_destroy_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_behavior_modify(
+	struct nb_cb_modify_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_behavior_destroy(
+	struct nb_cb_destroy_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_vrf_name_modify(
+	struct nb_cb_modify_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_vrf_name_destroy(
+	struct nb_cb_destroy_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_locator_name_modify(
+	struct nb_cb_modify_args *args);
+int routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_locator_name_destroy(
+	struct nb_cb_destroy_args *args);
 
 /* Optional 'apply_finish' callbacks. */
 
 void routing_control_plane_protocols_control_plane_protocol_staticd_route_list_path_list_frr_nexthops_nexthop_apply_finish(
 	struct nb_cb_apply_finish_args *args);
 void routing_control_plane_protocols_control_plane_protocol_staticd_route_list_src_list_path_list_frr_nexthops_nexthop_apply_finish(
 	struct nb_cb_apply_finish_args *args);
+void routing_control_plane_protocols_control_plane_protocol_staticd_segment_routing_srv6_local_sids_sid_apply_finish(
+	struct nb_cb_apply_finish_args *args);
 
 /* Optional 'pre_validate' callbacks. */
 int routing_control_plane_protocols_control_plane_protocol_staticd_route_list_path_list_frr_nexthops_nexthop_pre_validate(
@@ -206,6 +236,24 @@ int routing_control_plane_protocols_name_validate(
 	FRR_S_ROUTE_SRC_INFO_KEY_NO_DISTANCE_XPATH                             \
 	FRR_STATIC_ROUTE_NH_KEY_XPATH
 
+/* srv6 */
+#define FRR_STATIC_SRV6_INFO_KEY_XPATH                                                             \
+	"/frr-routing:routing/control-plane-protocols/"                                            \
+	"control-plane-protocol[type='%s'][name='%s'][vrf='%s']/"                                  \
+	"frr-staticd:staticd/segment-routing/srv6"
+
+/* srv6/static-sids */
+#define FRR_STATIC_SRV6_SID_KEY_XPATH                                                              \
+	FRR_STATIC_SRV6_INFO_KEY_XPATH                                                             \
+	"/static-sids/"                                                                            \
+	"sid[sid='%s']"
+
+#define FRR_STATIC_SRV6_SID_BEHAVIOR_XPATH "/behavior"
+
+#define FRR_STATIC_SRV6_SID_VRF_NAME_XPATH "/vrf-name"
+
+#define FRR_STATIC_SRV6_SID_LOCATOR_NAME_XPATH "/locator-name"
+
 #ifdef __cplusplus
 }
 #endif