Changed UDP protocol to always utilize the source address validation.

HISTORY

@@ -164,3 +164,5 @@ VDR Plugin 'iptv' Revision History
 - Updated for vdr-1.7.27.
 - Fixed some channel switching bugs.
 - Added support for a service interface.
+- Changed UDP protocol to always utilize the source address
+  validation.

README

@@ -161,9 +161,6 @@ Notes:
 - EIT scanning functionality can be disabled for all IPTV channels by applying
   the "disable_eitscan" patch to the VDR.
 
-- Source address validation can be enabled for UDP protocol separated by 
-  adding the source address after a ';' character: "U=239.192.0.1;239.192.0.2"
-
 - Section id and pid scanners should be disabled after the correct data is
   found. This can be made via VDR's channel editor.
 

protocoludp.c

@@ -20,7 +20,6 @@
 
 cIptvProtocolUdp::cIptvProtocolUdp()
 : streamAddr(strdup("")),
-  sourceAddr(strdup("")),
   streamPort(0)
 {
   debug("cIptvProtocolUdp::cIptvProtocolUdp()\n");
@@ -33,33 +32,31 @@ cIptvProtocolUdp::~cIptvProtocolUdp()
   cIptvProtocolUdp::Close();
   // Free allocated memory
   free(streamAddr);
-  free(sourceAddr);
 }
 
 bool cIptvProtocolUdp::Open(void)
 {
-  debug("cIptvProtocolUdp::Open(): sourceAddr=%s streamAddr=%s\n", sourceAddr, streamAddr);
-  OpenSocket(streamPort, isempty(sourceAddr) ? INADDR_ANY : inet_addr(sourceAddr));
+  debug("cIptvProtocolUdp::Open(): streamAddr=%s\n", streamAddr);
+  OpenSocket(streamPort, inet_addr(streamAddr));
   if (!isempty(streamAddr)) {
      // Join a new multicast group
-     JoinMulticast(inet_addr(streamAddr));
+     JoinMulticast();
      }
   return true;
 }
 
 bool cIptvProtocolUdp::Close(void)
 {
-  debug("cIptvProtocolUdp::Close(): sourceAddr=%s streamAddr=%s\n", sourceAddr, streamAddr);
+  debug("cIptvProtocolUdp::Close(): streamAddr=%s\n", streamAddr);
   if (!isempty(streamAddr)) {
      // Drop the multicast group
-     OpenSocket(streamPort, isempty(sourceAddr) ? INADDR_ANY : inet_addr(sourceAddr));
-     DropMulticast(inet_addr(streamAddr));
+     OpenSocket(streamPort, inet_addr(streamAddr));
+     DropMulticast();
      }
   // Close the socket
   CloseSocket();
   // Do NOT reset stream and source addresses
   //streamAddr = strcpyrealloc(streamAddr, "");
-  //sourceAddr = strcpyrealloc(sourceAddr, "");
   //streamPort = 0;
   return true;
 }
@@ -75,23 +72,16 @@ bool cIptvProtocolUdp::Set(const char* Location, const int Parameter, const int
   if (!isempty(Location)) {
      // Drop the multicast group
      if (!isempty(streamAddr)) {
-        OpenSocket(streamPort, isempty(sourceAddr) ? INADDR_ANY : inet_addr(sourceAddr));
-        DropMulticast(inet_addr(streamAddr));
+        OpenSocket(streamPort, inet_addr(streamAddr));
+        DropMulticast();
         }
      // Update stream address and port
      streamAddr = strcpyrealloc(streamAddr, Location);
-     char *p = strstr(streamAddr, ";");
-     if (p) {
-        sourceAddr = strcpyrealloc(sourceAddr, p + 1);
-        *p = 0;
-        }
-     else
-        sourceAddr = strcpyrealloc(sourceAddr, "");
      streamPort = Parameter;
      // Join a new multicast group
      if (!isempty(streamAddr)) {
-        OpenSocket(streamPort, isempty(sourceAddr) ? INADDR_ANY : inet_addr(sourceAddr));
-        JoinMulticast(inet_addr(streamAddr));
+        OpenSocket(streamPort, inet_addr(streamAddr));
+        JoinMulticast();
         }
      }
   return true;

protocoludp.h

@@ -15,7 +15,6 @@
 class cIptvProtocolUdp : public cIptvUdpSocket, public cIptvProtocolIf {
 private:
   char* streamAddr;
-  char* sourceAddr;
   int streamPort;
 
 public:

socket.c

@@ -18,8 +18,8 @@
 #include "socket.h"
 
 cIptvSocket::cIptvSocket()
-: socketDesc(-1),
-  socketPort(0),
+: socketPort(0),
+  socketDesc(-1),
   isActive(false)
 {
   debug("cIptvSocket::cIptvSocket()\n");
@@ -89,7 +89,7 @@ void cIptvSocket::CloseSocket(void)
 
 // UDP socket class
 cIptvUdpSocket::cIptvUdpSocket()
-: sourceAddr(INADDR_ANY)
+: streamAddr(INADDR_ANY)
 {
   debug("cIptvUdpSocket::cIptvUdpSocket()\n");
 }
@@ -99,28 +99,28 @@ cIptvUdpSocket::~cIptvUdpSocket()
   debug("cIptvUdpSocket::~cIptvUdpSocket()\n");
 }
 
-bool cIptvUdpSocket::OpenSocket(const int Port, const in_addr_t SourceAddr)
+bool cIptvUdpSocket::OpenSocket(const int Port, const in_addr_t StreamAddr)
 {
   debug("cIptvUdpSocket::OpenSocket()\n");
-  sourceAddr = SourceAddr;
+  streamAddr = StreamAddr;
   return cIptvSocket::OpenSocket(Port, true);
 }
 
 void cIptvUdpSocket::CloseSocket(void)
 {
   debug("cIptvUdpSocket::CloseSocket()\n");
-  sourceAddr = INADDR_ANY;
+  streamAddr = INADDR_ANY;
   cIptvSocket::CloseSocket();
 }
 
-bool cIptvUdpSocket::JoinMulticast(const in_addr_t StreamAddr)
+bool cIptvUdpSocket::JoinMulticast(void)
 {
   debug("cIptvUdpSocket::JoinMulticast()\n");
   // Check if socket exists
   if (!isActive && (socketDesc >= 0)) {
      // Join a new multicast group
      struct ip_mreq mreq;
-     mreq.imr_multiaddr.s_addr = StreamAddr;
+     mreq.imr_multiaddr.s_addr = streamAddr;
      mreq.imr_interface.s_addr = htonl(INADDR_ANY);
      ERROR_IF_RET(setsockopt(socketDesc, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0, "setsockopt(IP_ADD_MEMBERSHIP)", return false);
      // Update multicasting flag
@@ -129,14 +129,14 @@ bool cIptvUdpSocket::JoinMulticast(const in_addr_t StreamAddr)
   return true;
 }
 
-bool cIptvUdpSocket::DropMulticast(const in_addr_t StreamAddr)
+bool cIptvUdpSocket::DropMulticast(void)
 {
   debug("cIptvUdpSocket::DropMulticast()\n");
   // Check if socket exists
   if (isActive && (socketDesc >= 0)) {
      // Drop the existing multicast group
      struct ip_mreq mreq;
-     mreq.imr_multiaddr.s_addr = StreamAddr;
+     mreq.imr_multiaddr.s_addr = streamAddr;
      mreq.imr_interface.s_addr = htonl(INADDR_ANY);
      ERROR_IF_RET(setsockopt(socketDesc, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0, "setsockopt(IP_DROP_MEMBERSHIP)", return false);
      // Update multicasting flag
@@ -180,10 +180,10 @@ int cIptvUdpSocket::Read(unsigned char* BufferAddr, unsigned int BufferLen)
      }
   else if (len > 0) {
      // Process auxiliary received data and validate source address
-     for (cmsg = CMSG_FIRSTHDR(&msgh); (sourceAddr != INADDR_ANY) && (cmsg != NULL); cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
+     for (cmsg = CMSG_FIRSTHDR(&msgh); (streamAddr != INADDR_ANY) && (cmsg != NULL); cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
          if ((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_PKTINFO)) {
             struct in_pktinfo *i = (struct in_pktinfo *)CMSG_DATA(cmsg);
-            if (i->ipi_addr.s_addr != sourceAddr) {
+            if (i->ipi_addr.s_addr != streamAddr) {
                //debug("Discard packet due to invalid source address: %s", inet_ntoa(i->ipi_addr));
                return 0;
                }

socket.h

@@ -11,9 +11,11 @@
 #include <arpa/inet.h>
 
 class cIptvSocket {
+private:
+  int socketPort;
+
 protected:
   int socketDesc;
-  int socketPort;
   struct sockaddr_in sockAddr;
   bool isActive;
 
@@ -28,16 +30,16 @@ public:
 
 class cIptvUdpSocket : public cIptvSocket {
 private:
-  in_addr_t sourceAddr;
+  in_addr_t streamAddr;
 
 public:
   cIptvUdpSocket();
   virtual ~cIptvUdpSocket();
   virtual int Read(unsigned char* BufferAddr, unsigned int BufferLen);
-  bool OpenSocket(const int Port, const in_addr_t SourceAddr = INADDR_ANY);
+  bool OpenSocket(const int Port, const in_addr_t StreamAddr = INADDR_ANY);
   void CloseSocket(void);
-  bool JoinMulticast(const in_addr_t StreamAddr);
-  bool DropMulticast(const in_addr_t StreamAddr);
+  bool JoinMulticast(void);
+  bool DropMulticast(void);
 };
 
 class cIptvTcpSocket : public cIptvSocket {