locator: topology: add helpers to retrieve this host_id and address

And respective `is_me()` predicates,
to prepare for getting rid of fb_utilities.

Signed-off-by: Benny Halevy <bhalevy@scylladb.com>

locator/token_metadata.cc

@@ -22,7 +22,6 @@
 #include <boost/range/adaptors.hpp>
 #include <seastar/core/smp.hh>
 #include "utils/stall_free.hh"
-#include "utils/fb_utilities.hh"
 
 namespace locator {
 

locator/topology.cc

@@ -15,7 +15,6 @@
 #include "locator/topology.hh"
 #include "locator/production_snitch_base.hh"
 #include "utils/stall_free.hh"
-#include "utils/fb_utilities.hh"
 
 namespace locator {
 

locator/topology.hh

@@ -161,6 +161,7 @@ class topology {
 public:
     struct config {
         inet_address this_endpoint;
+        inet_address this_cql_address;   // corresponds to broadcast_rpc_address
         host_id this_host_id;
         endpoint_dc_rack local_dc_rack;
         bool disable_proximity_sorting = false;
@@ -336,6 +337,26 @@ public:
 
     void for_each_node(std::function<void(const node*)> func) const;
 
+    host_id my_host_id() const noexcept {
+        return _cfg.this_host_id;
+    }
+
+    inet_address my_address() const noexcept {
+        return _cfg.this_endpoint;
+    }
+
+    inet_address my_cql_address() const noexcept {
+        return _cfg.this_cql_address;
+    }
+
+    bool is_me(const locator::host_id& id) const noexcept {
+        return id == my_host_id();
+    }
+
+    bool is_me(const inet_address& addr) const noexcept {
+        return addr == my_address();
+    }
+
 private:
     bool is_configured_this_node(const node&) const;
     const node* add_node(node_holder node);