Fix minor issues in introspect for BGP paths

Following changes are implemented:

- Rename remote_bgp_id_ to peer_bgp_id_
- Initialize BgpPeer members in constructor initialization list
- Remove unused preference and metric fields from ShowRoutePath
- Fill in protocol as Local if appropriate
- Fill in local AS, peer AS and peer router id for BGP paths

Change-Id: Iac6ed81cc615d604c3a4ec91d1f33bd6d00ff15f
Closes-Bug: 1474158

src/bgp/bgp_peer.cc

@@ -366,7 +366,9 @@ BgpPeer::BgpPeer(BgpServer *server, RoutingInstance *instance,
           vpn_tables_registered_(false),
           local_as_(config->local_as()),
           peer_as_(config_->peer_as()),
-          remote_bgp_id_(0),
+          local_bgp_id_(config->local_identifier()),
+          peer_bgp_id_(0),
+          configured_families_(config->address_families()),
           peer_type_((peer_as_ == local_as_) ? BgpProto::IBGP : BgpProto::EBGP),
           policy_(peer_type_, RibExportPolicy::BGP, peer_as_, -1, 0),
           peer_close_(new PeerClose(this)),
@@ -384,11 +386,7 @@ BgpPeer::BgpPeer(BgpServer *server, RoutingInstance *instance,
         peer_basename_ = peer_name_;
     }
 
-    boost::system::error_code ec;
-    local_bgp_id_ = config->local_identifier();
-
     refcount_ = 0;
-    configured_families_ = config->address_families();
     sort(configured_families_.begin(), configured_families_.end());
     BOOST_FOREACH(string family, configured_families_) {
         Address::Family fmly = Address::FamilyFromString(family);
@@ -406,7 +404,6 @@ BgpPeer::BgpPeer(BgpServer *server, RoutingInstance *instance,
     peer_info.set_local_id(local_bgp_id_);
     if (!config->address_families().empty())
         peer_info.set_configured_families(config->address_families());
-
     peer_info.set_peer_address(peer_key_.endpoint.address().to_string());
     BGPPeerInfo::Send(peer_info);
 }
@@ -671,7 +668,11 @@ bool BgpPeer::IsXmppPeer() const {
 }
 
 uint32_t BgpPeer::bgp_identifier() const {
-    return ntohl(remote_bgp_id_);
+    return ntohl(peer_bgp_id_);
+}
+
+string BgpPeer::bgp_identifier_string() const {
+    return Ip4Address(ntohl(peer_bgp_id_)).to_string();
 }
 
 //
@@ -985,7 +986,7 @@ void BgpPeer::SendNotification(BgpSession *session,
 }
 
 void BgpPeer::SetCapabilities(const BgpProto::OpenMessage *msg) {
-    remote_bgp_id_ = htonl(msg->identifier);
+    peer_bgp_id_ = htonl(msg->identifier);
     capabilities_.clear();
     std::vector<BgpProto::OpenMessage::OptParam *>::const_iterator it;
     for (it = msg->opt_params.begin(); it < msg->opt_params.end(); ++it) {
@@ -996,7 +997,7 @@ void BgpPeer::SetCapabilities(const BgpProto::OpenMessage *msg) {
 
     BgpPeerInfoData peer_info;
     peer_info.set_name(ToUVEKey());
-    peer_info.set_peer_id(remote_bgp_id_);
+    peer_info.set_peer_id(peer_bgp_id_);
 
     std::vector<std::string> families;
     std::vector<BgpProto::OpenMessage::Capability *>::iterator cap_it;
@@ -1715,7 +1716,7 @@ void BgpPeer::FillNeighborInfo(BgpSandeshContext *bsc,
     nbr.set_deleted(IsDeleted());
     nbr.set_deleted_at(UTCUsecToString(deleter_->delete_time_stamp_usecs()));
     nbr.set_peer_address(peer_key_.endpoint.address().to_string());
-    nbr.set_peer_id(Ip4Address(ntohl(remote_bgp_id_)).to_string());
+    nbr.set_peer_id(bgp_identifier_string());
     nbr.set_peer_asn(peer_as());
     nbr.set_encoding("BGP");
     nbr.set_peer_type(PeerType() == BgpProto::IBGP ? "internal" : "external");

src/bgp/bgp_peer.h

@@ -123,6 +123,7 @@ class BgpPeer : public IPeer {
 
     // The BGP Identifier in host byte order.
     virtual uint32_t bgp_identifier() const;
+    std::string bgp_identifier_string() const;
 
     const AddressFamilyList &families() const {
         return family_;
@@ -329,8 +330,8 @@ class BgpPeer : public IPeer {
     std::vector<BgpProto::OpenMessage::Capability *> capabilities_;
     as_t local_as_;
     as_t peer_as_;
-    uint32_t remote_bgp_id_;    // network order
     uint32_t local_bgp_id_;     // network order
+    uint32_t peer_bgp_id_;      // network order
     AddressFamilyList family_;
     std::vector<std::string> configured_families_;
     std::vector<std::string> negotiated_families_;

src/bgp/bgp_peer.sandesh

@@ -120,9 +120,7 @@ struct ShowPmsiTunnel {
 
 struct ShowRoutePath {
     1: string protocol;
-    2: u32 preference;
     3: string last_modified;
-    4: u32 metric;
     5: u32 local_preference;
     6: u32 local_as;
     7: u32 peer_as;

src/bgp/bgp_route.cc

@@ -401,6 +401,13 @@ void BgpRoute::FillRouteInfo(const BgpTable *table,
             srp.set_protocol("Local");
         }
 
+        const BgpPeer *bgp_peer = dynamic_cast<const BgpPeer *>(peer);
+        if (bgp_peer) {
+            srp.set_local_as(bgp_peer->local_as());
+            srp.set_peer_as(bgp_peer->peer_as());
+            srp.set_peer_router_id(bgp_peer->bgp_identifier_string());
+        }
+
         const BgpAttr *attr = path->GetAttr();
         if (attr->as_path() != NULL)
             srp.set_as_path(attr->as_path()->path().ToString());