Add loose source routing support

api/pola/v1/pola.proto

@@ -31,6 +31,11 @@ enum SRPolicyType {
   SR_POLICY_TYPE_DYNAMIC = 2;
 }
 
+message Waypoint {
+  string router_id = 1;
+  string sid = 2; // optional: explicit SID override
+}
+
 message SRPolicy {
   bytes pcep_session_addr = 1;
   bytes src_addr = 2;
@@ -43,6 +48,7 @@ message SRPolicy {
   SRPolicyType type = 9;
   repeated Segment segment_list = 10;
   MetricType metric = 11;
+  repeated Waypoint waypoints = 12;
 }
 
 message CreateSRPolicyRequest {

cmd/pola/sr_policy_add.go

@@ -70,6 +70,11 @@
 	SIDStructure string `yaml:"sidStructure"`
 }
 
+type Waypoint struct {
+	RouterID string `yaml:"routerID"`
+	SID      string `yaml:"sid"` // optional: fixed SID override
+}
+
 type SRPolicy struct {
 	PCEPSessionAddr netip.Addr `yaml:"pcepSessionAddr"`
 	SrcAddr         netip.Addr `yaml:"srcAddr"`
@@ -81,6 +86,7 @@
 	Color           uint32     `yaml:"color"`
 	Type            string     `yaml:"type"`
 	Metric          string     `yaml:"metric"`
+	Waypoints       []Waypoint `yaml:"waypoints"`
 }
 
 type InputFormat struct {
@@ -154,7 +160,7 @@
 	return nil
 }
 
 func addSRPolicyWithSIDValidation(input InputFormat) error {
 	sampleInputDynamic := "#case: dynamic path\n" +
 		"asn: 65000\n" +
 		"srPolicy:\n" +
@@ -189,6 +195,7 @@
 	var srPolicyType pb.SRPolicyType
 	var metric pb.MetricType
 	var segmentList []*pb.Segment
+	var waypoints []*pb.Waypoint
 	switch input.SRPolicy.Type {
 	case "explicit":
 		if len(input.SRPolicy.SegmentList) == 0 {
@@ -220,7 +227,14 @@
 		default:
 			return fmt.Errorf("invalid input `metric`")
 		}
-
+		if len(input.SRPolicy.Waypoints) != 0 {
+			for _, wp := range input.SRPolicy.Waypoints {
+				waypoints = append(waypoints, &pb.Waypoint{
+					RouterId: wp.RouterID,
+					Sid:      wp.SID, // optional
+				})
+			}
+		}
 	default:
 		return fmt.Errorf("invalid input `type`")
 	}
@@ -234,6 +248,7 @@
 		Type:            srPolicyType,
 		SegmentList:     segmentList,
 		Metric:          metric,
+		Waypoints:       waypoints,
 	}
 	inputData := &pb.CreateSRPolicyRequest{
 		SrPolicy: srPolicy,

examples/containerlab/srv6_usid_dynamic-path_loose_source_routing_sfc/README.md

@@ -0,0 +1,151 @@
+# SRv6 uSID Dynamic Path
+
+Example topology powered by [Containerlab](https://containerlab.dev/)
+
+![Topology](./topo.png)
+
+## Requirements
+
+* container host (Linux)
+* vJunos image
+
+## Usage
+
+### Install Containerlab & vJunos-router
+
+[Install Containerlab](https://containerlab.dev/install/)
+
+```bash
+sudo bash -c "$(curl -sL https://get.containerlab.dev)"
+```
+
+Install vJunos on [Vrnetlab](https://containerlab.dev/manual/vrnetlab/)
+
+### Building a Lab Network
+
+Create bridge
+
+```bash
+sudo ip link add switch type bridge
+sudo ip link set dev switch up
+```
+
+Clone and build the modified branches:
+
+* Pola PCE: [watal/pola feature/ietf124-srv6-sfc branch](https://github.com/watal/pola/tree/feature/ietf124-srv6-sfc)
+  * Add the following to `go.mod`:
+
+    ```text
+    replace github.com/osrg/gobgp/v4 => ../gobgp  # adjust path to your local gobgp
+    ```
+
+* GoBGP: [watal/gobgp feature/bgp-ls-service-segments branch](https://github.com/watal/gobgp/tree/feature/bgp-ls-service-segments)
+
+Start Containerlab network
+
+```bash
+git clone https://github.com/nttcom/pola
+cd pola/examples/containerlab/srv6_usid_dynamic-path
+
+sudo containerlab deploy
+```
+
+### Starting Daemons
+
+```bash
+$ sudo docker exec -it clab-dynamic-path-gobgp-server bash
+# gobgpd -f /gobgpd.yml
+```
+
+```bash
+$ sudo docker exec -it clab-dynamic-path-gobgp-client bash
+# gobgpd -f /gobgpd.yml
+```
+
+```bash
+$ sudo docker exec -it clab-dynamic-path-pola bash
+# polad -f /polad.yaml
+```
+
+### Show TED
+
+```bash
+$ sudo docker exec -it clab-dynamic-path-pola bash
+# pola -p 50052 ted 
+```
+
+### Apply SR Policy
+
+Connect to PCEP container, check PCEP session and SR policy
+
+```bash
+$ sudo docker exec -it clab-dynamic-path-pola bash
+
+# pola session -p 50052
+sessionAddr(0): fd00::2
+
+# pola sr-policy list -p 50052
+no SR Policies
+```
+
+Apply and check SR Policy
+
+```bash
+# pola sr-policy add -f /pe02-policy1.yaml -p 50052
+success!
+
+# pola sr-policy list -p 50052
+root@pola:/# ./pola -p 50052 sr-policy list
+Session: fd00::2
+  PolicyName: DYNAMIC-POLICY
+    SrcAddr: fd00:ffff::2
+    DstAddr: fd00:ffff::1
+    Color: 100
+    Preference: 0
+    SegmentList: fcbb:bb00:1004:: -> fcbb:bb00:1001::
+```
+
+Enter container pe02 and check SR Policy
+
+* user: admin
+* pass: admin@123
+
+```text
+$ ssh clab-dynamic-path-pe02 -l admin
+
+admin@pe02> show spring-traffic-engineering lsp brief
+To                        State        LSPname
+fd00:ffff::1-100<c6>      Up           DYNAMIC-POLICY
+
+
+Total displayed LSPs: 1 (Up: 1, Down: 0, Initializing: 0)
+
+admin@pe02> show spring-traffic-engineering lsp name DYNAMIC-POLICY detail
+E = Entropy-label Capability
+
+Name: DYNAMIC-POLICY
+  Tunnel-source: Path computation element protocol(PCEP)
+  Tunnel Forward Type: SRV6
+  To: fd00:ffff::1-100<c6>
+  From: fd00:ffff::2
+  State: Up
+    Path Status: NA
+    Outgoing interface: NA
+    Delegation compute constraints info:
+      Actual-Bandwidth from PCUpdate: 0
+      Bandwidth-Requested from PCUpdate: 0
+      Setup-Priority: 0
+      Reservation-Priority: 0
+    Auto-translate status: Disabled Auto-translate result: N/A
+    BFD status: N/A BFD name: N/A
+    BFD remote-discriminator: N/A
+    Segment ID : 129
+    ERO Valid: true
+      SR-ERO hop count: 2
+        Hop 1 (Strict):
+          NAI: IPv6 Node ID, Node address: fcbb:bb00:1004::
+          SID type: srv6-sid, Value: fcbb:bb00:1004::
+        Hop 2 (Strict):
+          NAI: IPv6 Node ID, Node address: fcbb:bb00:1001::
+          SID type: srv6-sid, Value: fcbb:bb00:1001::
+```

examples/containerlab/srv6_usid_dynamic-path_loose_source_routing_sfc/gobgpd/gobgp-client.yml

@@ -0,0 +1,14 @@
+global:
+  config:
+    as: 65000
+    router-id: "10.255.0.255"
+neighbors:
+  - config:
+      peer-as: 65000
+      neighbor-address: "fd00::4"
+    afi-safis:
+      - config:
+          afi-safi-name: ls
+    transport:
+      config:
+        local-address: "fd00::5"

examples/containerlab/srv6_usid_dynamic-path_loose_source_routing_sfc/gobgpd/gobgp-server.yml

@@ -0,0 +1,23 @@
+global:
+  config:
+    as: 65000
+    router-id: "10.255.0.254"
+neighbors:
+  - config:
+      peer-as: 65000
+      neighbor-address: "fd00::1"
+    afi-safis:
+      - config:
+          afi-safi-name: ls
+    transport:
+      config:
+        local-address: "fd00::4"
+  - config:
+      peer-as: 65000
+      neighbor-address: "fd00::5"
+    afi-safis:
+      - config:
+          afi-safi-name: ls
+    transport:
+      config:
+        local-address: "fd00::4"

examples/containerlab/srv6_usid_dynamic-path_loose_source_routing_sfc/polad/polad.yaml

@@ -0,0 +1,18 @@
+global:
+  pcep:
+    address: "fd00::3"
+    port: 4189
+  grpcServer:
+    address: "127.0.0.1"
+    port: 50052
+  log:
+    path: "/var/log/pola/"
+    debug: true
+    name: "polad.log"
+  ted:
+    enable: true
+    source: "gobgp"
+  gobgp:
+    grpcClient:
+      address: "10.0.0.4"
+      port: 50051

examples/containerlab/srv6_usid_dynamic-path_loose_source_routing_sfc/sr-policies/pe02-policy1.yaml

@@ -0,0 +1,14 @@
+asn: 65000
+srPolicy:
+  pcepSessionAddr: "fd00::2"
+  srcRouterID: "0000.0001.0002"
+  dstRouterID: "0000.0001.0001"
+  name: "DYNAMIC-POLICY"
+  color: 100
+  type: dynamic
+  metric: igp
+  waypoints:
+    - routerID: "0000.0001.0003"
+    - routerID: "0000.0001.0004"
+    - routerID: "0000.0001.0003"
+      sid: "fcbb:bb00:1003::"