diff --git a/src/cip.h b/src/cip.h
index 3e53b24..d916aac 100644
--- a/src/cip.h
+++ b/src/cip.h
@@ -33,25 +33,26 @@ class CIp
 {
 public:
     // constructors
-    CIp();
+    CIp(const int af = AF_INET);
     //CIp(uint8, uint8, uint8, uint8);
-    CIp(const struct sockaddr_in *);
+    CIp(const struct sockaddr_storage *, socklen_t);
     CIp(const char *);
     CIp(const CIp &);
+    CIp(const CIp &, uint16);
     
     // destructor
     virtual ~CIp() {};
     
     // sockaddr
-    void SetSockAddr(struct sockaddr_in *);
-    struct sockaddr_in *GetSockAddr(void)     { return &m_Addr; }
+    void SetSockAddr(struct sockaddr_storage *, socklen_t);
+    struct sockaddr_storage *GetSockAddr(socklen_t &);
     
     // get
-    uint32 GetAddr(void) const                { return m_Addr.sin_addr.s_addr; }
-    uint16 GetPort(void) const                { return m_Addr.sin_port; }
+    uint32 GetAddr(void) const;
+    uint16 GetPort(void) const;
     
     // set
-    void SetPort(uint16 port)                 { m_Addr.sin_port = port; }
+    void SetPort(uint16 port);
     
     // operator
     bool operator ==(const CIp &) const;
diff --git a/src/creflector.h b/src/creflector.h
index 98dccf8..8a59144 100644
--- a/src/creflector.h
+++ b/src/creflector.h
@@ -58,9 +58,9 @@ public:
     // settings
     void SetCallsign(const CCallsign &callsign)     { m_Callsign = callsign; }
     const CCallsign &GetCallsign(void) const        { return m_Callsign; }
-    void SetListenIp(const CIp &ip)                 { m_Ip = ip; UpdateListenMac(); }
+    void SetListenIp(int i, const CIp &ip)          { m_Ip[i] = ip; UpdateListenMac(); }
     void SetTranscoderIp(const CIp &ip)             { m_AmbedIp = ip; }
-    const CIp &GetListenIp(void) const              { return m_Ip; }
+    const CIp &GetListenIp(int i = 0) const         { return m_Ip[i]; }
     const uint8 *GetListenMac(void) const           { return (const uint8 *)m_Mac; }
     const CIp &GetTranscoderIp(void) const          { return m_AmbedIp; }
     
@@ -124,7 +124,7 @@ protected:
 protected:
     // identity
     CCallsign       m_Callsign;
-    CIp             m_Ip;
+    CIp             m_Ip[UDP_SOCKET_MAX];
     uint8           m_Mac[6];
     CIp             m_AmbedIp;
     
diff --git a/src/main.h b/src/main.h
index 309005f..3752ea7 100644
--- a/src/main.h
+++ b/src/main.h
@@ -39,8 +39,11 @@
 #include <iostream>
 #include <iomanip>
 #include <fstream>
+#include <random>
 #include <algorithm>
 #include <arpa/inet.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
 #include <ifaddrs.h>
 
 ////////////////////////////////////////////////////////////////////////////////////////