feat(api): enhance peer session management and documentation

- Added new fields to the API for tracking connected speakers and session states across multiple nodes, including `connected_speaker_id`, `connected_speaker_label`, `session_on_speakers`, `established_on_speakers`, and `session_mismatch`.
- Implemented a new endpoint for retrieving bird protocol sessions, enhancing the agent server functionality.
- Updated the OpenAPI documentation to reflect the new fields and query parameters, improving clarity for API consumers.
- Modified the frontend to display connected speaker information and session states, providing better visibility into peer connections.
- Updated deployment documentation to clarify the configuration requirements for enabling IP forwarding on VPS.

internal/httpapi/peers_live.go

@@ -0,0 +1,263 @@
+package httpapi
+
+import (
+	"context"
+	"net/netip"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"evobgp/internal/birdfmt"
+	"evobgp/internal/nodedispatch"
+	"evobgp/internal/store"
+)
+
+const peerLiveCacheTTL = 15 * time.Second
+
+type speakerBGPLive struct {
+	SpeakerID string
+	Label     string
+	Sessions  []birdfmt.BGPSession
+	Error     string
+}
+
+type peerLiveCacheEntry struct {
+	at    time.Time
+	views []speakerBGPLive
+}
+
+var peerLiveCache sync.Map // tenantID -> peerLiveCacheEntry
+
+type peerSessionOnSpeaker struct {
+	SpeakerID string `json:"speaker_id"`
+	Label     string `json:"label"`
+	State     string `json:"state"`
+}
+
+func speakerDisplayLabel(sp *store.Speaker) string {
+	if sp == nil {
+		return ""
+	}
+	meta := store.ParseSpeakerMeta(sp.MetaJSON)
+	host := strings.TrimSpace(meta.AgentDomain)
+	if host == "" {
+		host = strings.TrimSpace(sp.Endpoint)
+	}
+	if strings.EqualFold(strings.TrimSpace(sp.Role), "master") {
+		if host != "" {
+			return "CP · " + host
+		}
+		return "CP (master)"
+	}
+	if host != "" {
+		return host
+	}
+	return sp.ID
+}
+
+func masterSpeakerID(speakers []*store.Speaker) string {
+	for _, sp := range speakers {
+		if sp != nil && strings.EqualFold(strings.TrimSpace(sp.Role), "master") {
+			return sp.ID
+		}
+	}
+	return ""
+}
+
+func (s *Server) collectSpeakerBGPLive(ctx context.Context, tenantID string, fresh bool) []speakerBGPLive {
+	if !fresh {
+		if v, ok := peerLiveCache.Load(tenantID); ok {
+			ent := v.(peerLiveCacheEntry)
+			if time.Since(ent.at) < peerLiveCacheTTL {
+				return ent.views
+			}
+		}
+	}
+	speakers := s.store.ListSpeakersForTenant(tenantID)
+	views := make([]speakerBGPLive, 0, len(speakers)+1)
+
+	if sock := strings.TrimSpace(os.Getenv("EVOBGP_BIRDC_SOCKET")); sock != "" {
+		v := speakerBGPLive{Label: "CP (local BIRD)"}
+		if mid := masterSpeakerID(speakers); mid != "" {
+			v.SpeakerID = mid
+			for _, sp := range speakers {
+				if sp != nil && sp.ID == mid {
+					v.Label = speakerDisplayLabel(sp)
+					break
+				}
+			}
+		}
+		out, err := birdfmt.ShowProtocols(ctx, sock, strings.TrimSpace(os.Getenv("EVOBGP_BIRDC_BIN")))
+		if err != nil {
+			v.Error = err.Error()
+		} else {
+			v.Sessions = birdfmt.ParseBGPSessions(out)
+		}
+		views = append(views, v)
+	}
+
+	opts := nodedispatch.Options{Timeout: 8 * time.Second}
+	type resWrap struct {
+		sp  *store.Speaker
+		res nodedispatch.BirdProtocolsResult
+	}
+	ch := make(chan resWrap, len(speakers))
+	var wg sync.WaitGroup
+	for _, sp := range speakers {
+		if sp == nil {
+			continue
+		}
+		meta := store.ParseSpeakerMeta(sp.MetaJSON)
+		if !store.SpeakerNeedsRemoteDispatch(sp.Role, meta) {
+			continue
+		}
+		wg.Add(1)
+		go func(speaker *store.Speaker) {
+			defer wg.Done()
+			ch <- resWrap{
+				sp:  speaker,
+				res: nodedispatch.FetchBirdProtocols(ctx, speaker, opts),
+			}
+		}(sp)
+	}
+	wg.Wait()
+	close(ch)
+	for rw := range ch {
+		views = append(views, speakerBGPLive{
+			SpeakerID: rw.sp.ID,
+			Label:     speakerDisplayLabel(rw.sp),
+			Sessions:  rw.res.Sessions,
+			Error:     rw.res.Error,
+		})
+	}
+
+	peerLiveCache.Store(tenantID, peerLiveCacheEntry{at: time.Now(), views: views})
+	return views
+}
+
+func matchPeerOnSpeakers(peer *store.BGPPeer, views []speakerBGPLive) (
+	bestState string,
+	connectedID string,
+	connectedLabel string,
+	establishedOn []peerSessionOnSpeaker,
+	on []peerSessionOnSpeaker,
+	mismatch bool,
+) {
+	if peer == nil {
+		return "", "", "", nil, nil, false
+	}
+	neighbor, hasNeighbor := store.ParsePeerNeighbor(peer.Neighbor)
+	protoName := birdfmt.PeerProtocolName(peer.ID)
+
+	for _, v := range views {
+		if v.Error != "" && len(v.Sessions) == 0 {
+			continue
+		}
+		for _, sess := range v.Sessions {
+			if !peerSessionMatches(sess, protoName, neighbor, hasNeighbor) {
+				continue
+			}
+			hit := peerSessionOnSpeaker{
+				SpeakerID: v.SpeakerID,
+				Label:     v.Label,
+				State:     sess.State,
+			}
+			on = append(on, hit)
+			if strings.EqualFold(strings.TrimSpace(sess.State), "Established") {
+				establishedOn = append(establishedOn, hit)
+			}
+			if bestState == "" || sessionStateRank(sess.State) > sessionStateRank(bestState) {
+				bestState = sess.State
+			}
+		}
+	}
+
+	if len(establishedOn) > 0 {
+		bestState = "Established"
+		labels := make([]string, 0, len(establishedOn))
+		for _, e := range establishedOn {
+			labels = append(labels, e.Label)
+		}
+		connectedLabel = strings.Join(labels, ", ")
+		if len(establishedOn) == 1 {
+			connectedID = establishedOn[0].SpeakerID
+		}
+	} else if len(on) == 1 {
+		connectedID = on[0].SpeakerID
+		connectedLabel = on[0].Label
+	}
+
+	if peer.SpeakerID != nil && strings.TrimSpace(*peer.SpeakerID) != "" && len(establishedOn) > 0 {
+		want := strings.TrimSpace(*peer.SpeakerID)
+		found := false
+		for _, e := range establishedOn {
+			if strings.EqualFold(strings.TrimSpace(e.SpeakerID), want) {
+				found = true
+				break
+			}
+		}
+		mismatch = !found
+	}
+	return bestState, connectedID, connectedLabel, establishedOn, on, mismatch
+}
+
+func peerSessionMatches(sess birdfmt.BGPSession, protoName string, neighbor netip.Addr, hasNeighbor bool) bool {
+	if strings.EqualFold(strings.TrimSpace(sess.Name), protoName) {
+		return true
+	}
+	if !hasNeighbor || strings.TrimSpace(sess.Neighbor) == "" {
+		return false
+	}
+	addr, err := netip.ParseAddr(strings.TrimSpace(sess.Neighbor))
+	if err != nil {
+		return false
+	}
+	return addr == neighbor
+}
+
+func sessionStateRank(state string) int {
+	switch strings.ToLower(strings.TrimSpace(state)) {
+	case "established":
+		return 100
+	case "openconfirm", "opensent":
+		return 80
+	case "active", "connect":
+		return 60
+	case "idle":
+		return 20
+	default:
+		return 10
+	}
+}
+
+func applyPeerLiveFields(row map[string]any, peer *store.BGPPeer, views []speakerBGPLive) {
+	state, connID, connLabel, establishedOn, on, mismatch := matchPeerOnSpeakers(peer, views)
+	if len(on) > 0 {
+		if state != "" {
+			row["session_state"] = state
+		}
+		row["connected_speaker_id"] = peerLiveSpeakerIDOrNull(connID)
+		row["connected_speaker_label"] = connLabel
+		row["session_on_speakers"] = on
+		if len(establishedOn) > 0 {
+			row["established_on_speakers"] = establishedOn
+		} else {
+			row["established_on_speakers"] = []peerSessionOnSpeaker{}
+		}
+		row["session_conflict"] = false
+		row["session_mismatch"] = mismatch
+		return
+	}
+	row["session_on_speakers"] = []peerSessionOnSpeaker{}
+	row["established_on_speakers"] = []peerSessionOnSpeaker{}
+	row["session_conflict"] = false
+	row["session_mismatch"] = false
+}
+
+func peerLiveSpeakerIDOrNull(id string) any {
+	if strings.TrimSpace(id) == "" {
+		return nil
+	}
+	return id
+}

internal/httpapi/peers_live_test.go

@@ -0,0 +1,67 @@
+package httpapi
+
+import (
+	"testing"
+
+	"evobgp/internal/birdfmt"
+	"evobgp/internal/store"
+)
+
+func TestMatchPeerOnSpeakers_establishedOnReplica(t *testing.T) {
+	peer := &store.BGPPeer{
+		ID:       "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee",
+		Neighbor: "198.51.100.2",
+	}
+	views := []speakerBGPLive{
+		{
+			SpeakerID: "master-id",
+			Label:     "CP · bgp.shz.su",
+			Sessions: []birdfmt.BGPSession{
+				{Name: birdfmt.PeerProtocolName(peer.ID), Neighbor: "198.51.100.2", State: "Idle"},
+			},
+		},
+		{
+			SpeakerID: "replica-id",
+			Label:     "bgp2.shz.su",
+			Sessions: []birdfmt.BGPSession{
+				{Name: birdfmt.PeerProtocolName(peer.ID), Neighbor: "198.51.100.2", State: "Established"},
+			},
+		},
+	}
+	state, connID, connLabel, established, on, mismatch := matchPeerOnSpeakers(peer, views)
+	if state != "Established" || connID != "replica-id" || connLabel != "bgp2.shz.su" {
+		t.Fatalf("got state=%q conn=%q label=%q", state, connID, connLabel)
+	}
+	if mismatch || len(on) != 2 || len(established) != 1 {
+		t.Fatalf("on=%+v established=%+v mismatch=%v", on, established, mismatch)
+	}
+}
+
+func TestMatchPeerOnSpeakers_multipleEstablished(t *testing.T) {
+	peer := &store.BGPPeer{ID: "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee", Neighbor: "198.51.100.2"}
+	views := []speakerBGPLive{
+		{SpeakerID: "a", Label: "n1", Sessions: []birdfmt.BGPSession{{Name: birdfmt.PeerProtocolName(peer.ID), State: "Established"}}},
+		{SpeakerID: "b", Label: "n2", Sessions: []birdfmt.BGPSession{{Name: birdfmt.PeerProtocolName(peer.ID), State: "Established"}}},
+	}
+	_, connID, label, established, _, mismatch := matchPeerOnSpeakers(peer, views)
+	if mismatch || connID != "" || label != "n1, n2" || len(established) != 2 {
+		t.Fatalf("connID=%q label=%q established=%+v mismatch=%v", connID, label, established, mismatch)
+	}
+}
+
+func TestMatchPeerOnSpeakers_mismatchConfiguredSpeaker(t *testing.T) {
+	replica := "replica-id"
+	peer := &store.BGPPeer{
+		ID:        "aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee",
+		Neighbor:  "198.51.100.2",
+		SpeakerID: &replica,
+	}
+	views := []speakerBGPLive{
+		{SpeakerID: "master-id", Label: "CP", Sessions: []birdfmt.BGPSession{{Name: birdfmt.PeerProtocolName(peer.ID), State: "Established"}}},
+		{SpeakerID: replica, Label: "bgp2", Sessions: []birdfmt.BGPSession{{Name: birdfmt.PeerProtocolName(peer.ID), State: "Idle"}}},
+	}
+	_, _, _, _, _, mismatch := matchPeerOnSpeakers(peer, views)
+	if !mismatch {
+		t.Fatal("expected mismatch when configured replica has no Established")
+	}
+}

internal/httpapi/routes.go

@@ -283,13 +283,14 @@ func (s *Server) handleListPeers(w http.ResponseWriter, r *http.Request) {
 	}
 	allPeers := s.store.ListPeers(a.TenantID)
 	page, next, more := store.PaginateOffset(allPeers, r.URL.Query().Get("cursor"), parseListLimit(r))
-	liveStates := s.liveBGPProtocolStates(r)
+	fresh := r != nil && strings.EqualFold(strings.TrimSpace(r.URL.Query().Get("live")), "1")
+	ctx, cancel := context.WithTimeout(r.Context(), 12*time.Second)
+	defer cancel()
+	liveViews := s.collectSpeakerBGPLive(ctx, a.TenantID, fresh)
 	items := make([]map[string]any, 0, len(page))
 	for _, p := range page {
 		row := peerJSON(p)
-		if st, ok := liveStates[peerProtocolNameForID(p.ID)]; ok && strings.TrimSpace(st) != "" {
-			row["session_state"] = strings.TrimSpace(st)
-		}
+		applyPeerLiveFields(row, p, liveViews)
 		items = append(items, row)
 	}
 	writeJSON(w, http.StatusOK, map[string]any{
@@ -366,16 +367,9 @@ func extractBGPSessionState(line string) string {
 	return ""
 }
 
-// peerProtocolNameForID must stay in sync with pipeline peer protocol naming.
+// peerProtocolNameForID forwards to birdfmt for tests and legacy callers.
 func peerProtocolNameForID(peerID string) string {
-	s := strings.ReplaceAll(strings.TrimSpace(peerID), "-", "")
-	if len(s) > 16 {
-		s = s[:16]
-	}
-	if s == "" {
-		s = "x"
-	}
-	return "evobgp_p_" + s
+	return birdfmt.PeerProtocolName(peerID)
 }
 
 func (s *Server) handleListSpeakers(w http.ResponseWriter, r *http.Request) {