Added getBoundAddress() function to Socket::Connection to get the locally bound address for a socket.

lib/socket.cpp

@@ -372,6 +372,29 @@ void Socket::Buffer::clear(){
   data.clear();
 }
 
+void Socket::Connection::setBoundAddr(){
+  if (!isTrueSocket){
+    boundaddr = "";
+    return;
+  }
+  struct sockaddr_in6 tmpaddr;
+  socklen_t len = sizeof(tmpaddr);
+  if (!getsockname(sSend, (sockaddr*)&tmpaddr, &len)){
+    static char addrconv[INET6_ADDRSTRLEN];
+    if (tmpaddr.sin6_family == AF_INET6){
+      boundaddr = inet_ntop(AF_INET6, &(tmpaddr.sin6_addr), addrconv, INET6_ADDRSTRLEN);
+      if (boundaddr.substr(0, 7) == "::ffff:"){
+        boundaddr = boundaddr.substr(7);
+      }
+      HIGH_MSG("Local IPv6 addr [%s]", boundaddr.c_str());
+    }
+    if (tmpaddr.sin6_family == AF_INET){
+      boundaddr = inet_ntop(AF_INET, &(((sockaddr_in *)&tmpaddr)->sin_addr), addrconv, INET6_ADDRSTRLEN);
+      HIGH_MSG("Local IPv4 addr [%s]", boundaddr.c_str());
+    }
+  }
+}
+
 /// Create a new base socket. This is a basic constructor for converting any valid socket to a
 /// Socket::Connection. \param sockNo Integer representing the socket to convert.
 Socket::Connection::Connection(int sockNo){
@@ -380,6 +403,7 @@ Socket::Connection::Connection(int sockNo){
   isTrueSocket = false;
   struct stat sBuf;
   if (sSend != -1 && !fstat(sSend, &sBuf)){isTrueSocket = S_ISSOCK(sBuf.st_mode);}
+  setBoundAddr();
   up = 0;
   down = 0;
   conntime = Util::epoch();
@@ -401,6 +425,7 @@ Socket::Connection::Connection(int write, int read){
   isTrueSocket = false;
   struct stat sBuf;
   if (sSend != -1 && !fstat(sSend, &sBuf)){isTrueSocket = S_ISSOCK(sBuf.st_mode);}
+  setBoundAddr();
   up = 0;
   down = 0;
   conntime = Util::epoch();
@@ -600,6 +625,7 @@ Socket::Connection::Connection(std::string host, int port, bool nonblock){
     int optval = 1;
     int optlen = sizeof(optval);
     setsockopt(sSend, SOL_SOCKET, SO_KEEPALIVE, &optval, optlen);
+    setBoundAddr();
   }
 }// Socket::Connection TCP Constructor
 
@@ -796,6 +822,11 @@ std::string Socket::Connection::getHost() const{
   return remotehost;
 }
 
+/// Gets locally bound host for connection, if available.
+std::string Socket::Connection::getBoundAddress() const{
+  return boundaddr;
+}
+
 /// Gets binary IPv6 address for connection, if available.
 /// Guaranteed to be either empty or 16 bytes long.
 std::string Socket::Connection::getBinHost(){

lib/socket.h

@@ -74,6 +74,7 @@ namespace Socket{
     int sSend;               ///< Write end of socket.
     int sRecv;               ///< Read end of socket.
     std::string remotehost; ///< Stores remote host address.
+    std::string boundaddr;          ///< Stores bound interface address.
     struct sockaddr_in6 remoteaddr;///< Stores remote host address.
     uint64_t up;
     uint64_t down;
@@ -83,6 +84,7 @@ namespace Socket{
     virtual unsigned int iwrite(const void *buffer, int len); ///< Incremental write call.
     bool iread(Buffer &buffer, int flags = 0);        ///< Incremental write call that is compatible with Socket::Buffer.
     bool iwrite(std::string &buffer);                 ///< Write call that is compatible with std::string.
+    void setBoundAddr();
   public:
     // friends
     friend class ::Buffer::user;
@@ -100,6 +102,7 @@ namespace Socket{
     std::string getHost() const;     ///< Gets hostname for connection, if available.
     std::string getBinHost();
     void setHost(std::string host); ///< Sets hostname for connection manually.
+    std::string getBoundAddress() const;
     int getSocket();                ///< Returns internal socket number.
     int getPureSocket();            ///< Returns non-piped internal socket number.
     std::string getError();         ///< Returns a string describing the last error that occured.