fix issue #1320 (allow providing ip/port in bind section of config)

llarp/config/config.cpp

@@ -345,16 +345,28 @@ namespace llarp
     LinkInfo info;
     info.port = 0;
     info.addressFamily = AF_INET;
-    info.interface = name;
 
-    std::vector<std::string_view> splits = split(value, ',');
-    for (std::string_view str : splits)
+    if (name == "address")
     {
-      int asNum = std::atoi(str.data());
-      if (asNum > 0)
-        info.port = asNum;
+      const IpAddress addr{value};
+      if (not addr.hasPort())
+        throw std::invalid_argument("no port provided in link address");
+      info.interface = addr.getIpAddr();
+      info.port = *addr.getPort();
+    }
+    else
+    {
+      info.interface = name;
 
-      // otherwise, ignore ("future-proofing")
+      std::vector<std::string_view> splits = split(value, ',');
+      for (std::string_view str : splits)
+      {
+        int asNum = std::atoi(str.data());
+        if (asNum > 0)
+          info.port = asNum;
+
+        // otherwise, ignore ("future-proofing")
+      }
     }
 
     return info;

llarp/net/ip_address.cpp

@@ -137,6 +137,18 @@ namespace llarp
     return m_ipAddress;  // TODO: port
   }
 
+  std::string
+  IpAddress::getIpAddr() const
+  {
+    return m_ipAddress;
+  }
+
+  bool
+  IpAddress::hasPort() const
+  {
+    return m_port.has_value();
+  }
+
   bool
   IpAddress::operator<(const IpAddress& other) const
   {

llarp/net/ip_address.hpp

@@ -69,6 +69,10 @@ namespace llarp
     std::optional<uint16_t>
     getPort() const;
 
+    /// Return true if we have a port set otherwise return false
+    bool
+    hasPort() const;
+
     /// Set the port.
     ///
     /// @param port
@@ -114,6 +118,10 @@ namespace llarp
     std::string
     toString() const;
 
+    /// get ip address component
+    std::string
+    getIpAddr() const;
+
     // TODO: other utility functions left over from Addr which may be useful
     // IsBogon() const;
     // isPrivate() const;