Add a preliminary multicast support.

README

@@ -116,6 +116,11 @@ Setup menu:
                              "Disable filter" options which allow you
                              to disable the individual section filters.
                              Valid range: "none" = 0 ... 7
+- Transport mode = unicast   If you want to use the non-standard
+                   multicast RTP-over-TCP transport mode, set this option
+                   rtp-o-tcp accordingly. Otherwise, the transport
+                             mode will be RTP-over-UDP via unicast or
+                             multicast.
 - [Red:Scan]                 Forces network scanning of SAT>IP hardware.
 - [Yellow:Devices]           Opens SAT>IP device status menu.
 - [Blue:Info]                Opens SAT>IP information/statistics menu.

config.c

@@ -19,7 +19,7 @@ cSatipConfig::cSatipConfig(void)
   useBytesM(1),
   portRangeStartM(0),
   portRangeStopM(0),
-  useRtpOverTcpM(false),
+  transportModeM(eTransportModeUnicast),
   detachedModeM(false),
   disableServerQuirksM(false),
   useSingleModelServersM(false)

config.h

@@ -21,7 +21,7 @@ private:
   unsigned int useBytesM;
   unsigned int portRangeStartM;
   unsigned int portRangeStopM;
-  bool useRtpOverTcpM;
+  unsigned int transportModeM;
   bool detachedModeM;
   bool disableServerQuirksM;
   bool useSingleModelServersM;
@@ -37,6 +37,12 @@ public:
     eOperatingModeHigh,
     eOperatingModeCount
   };
+  enum eTransportMode {
+    eTransportModeUnicast = 0,
+    eTransportModeMulticast,
+    eTransportModeRtpOverTcp,
+    eTransportModeCount
+  };
   enum eTraceMode {
     eTraceModeNormal  = 0x0000,
     eTraceModeDebug1  = 0x0001,
@@ -70,7 +76,10 @@ public:
   int GetCICAM(unsigned int indexP) const;
   unsigned int GetEITScan(void) const { return eitScanM; }
   unsigned int GetUseBytes(void) const { return useBytesM; }
-  bool GetUseRtpOverTcp(void) const { return useRtpOverTcpM; }
+  unsigned int GetTransportMode(void) const { return transportModeM; }
+  bool IsTransportModeUnicast(void) const { return (transportModeM == eTransportModeUnicast); }
+  bool IsTransportModeRtpOverTcp(void) const { return (transportModeM == eTransportModeRtpOverTcp); }
+  bool IsTransportModeMulticast(void) const { return (transportModeM == eTransportModeMulticast); }
   bool GetDetachedMode(void) const { return detachedModeM; }
   bool GetDisableServerQuirks(void) const { return disableServerQuirksM; }
   bool GetUseSingleModelServers(void) const { return useSingleModelServersM; }
@@ -87,7 +96,7 @@ public:
   void SetCICAM(unsigned int indexP, int cicamP);
   void SetEITScan(unsigned int onOffP) { eitScanM = onOffP; }
   void SetUseBytes(unsigned int onOffP) { useBytesM = onOffP; }
-  void SetUseRtpOverTcp(bool onOffP) { useRtpOverTcpM = onOffP; }
+  void SetTransportMode(unsigned int transportModeP) { transportModeM = transportModeP; }
   void SetDetachedMode(bool onOffP) { detachedModeM = onOffP; }
   void SetDisableServerQuirks(bool onOffP) { disableServerQuirksM = onOffP; }
   void SetUseSingleModelServers(bool onOffP) { useSingleModelServersM = onOffP; }

po/ca_ES.po

@@ -85,6 +85,15 @@ msgstr "Normal"
 msgid "high"
 msgstr "Alt"
 
+msgid "Unicast"
+msgstr ""
+
+msgid "Multicast"
+msgstr ""
+
+msgid "RTP-over-TCP"
+msgstr ""
+
 msgid "Button$Devices"
 msgstr "Dispositius"
 
@@ -178,13 +187,13 @@ msgstr "Filtra"
 msgid "Define an ill-behaving filter to be blacklisted."
 msgstr "Definir un filtre mal comportar a la llista negra."
 
-msgid "Use RTP-over-TCP mode"
+msgid "Transport mode"
 msgstr ""
 
 msgid ""
-"Define whether the RTP-over-TCP mode shall be used.\n"
+"Define which transport mode shall be used.\n"
 "\n"
-"This setting affects only SAT>IP devices supporting the feature."
+"Unicast, Multicast, RTP-over-TCP"
 msgstr ""
 
 msgid "Active SAT>IP servers:"

po/de_DE.po

@@ -85,6 +85,15 @@ msgstr "normal"
 msgid "high"
 msgstr "hoch"
 
+msgid "Unicast"
+msgstr ""
+
+msgid "Multicast"
+msgstr ""
+
+msgid "RTP-over-TCP"
+msgstr ""
+
 msgid "Button$Devices"
 msgstr "Geräte"
 
@@ -178,13 +187,13 @@ msgstr "Filter"
 msgid "Define an ill-behaving filter to be blacklisted."
 msgstr "Bestimme einen fehlerhaften Filter der ausgeblendet werden soll."
 
-msgid "Use RTP-over-TCP mode"
+msgid "Transport mode"
 msgstr ""
 
 msgid ""
-"Define whether the RTP-over-TCP mode shall be used.\n"
+"Define which transport mode shall be used.\n"
 "\n"
-"This setting affects only SAT>IP devices supporting the feature."
+"Unicast, Multicast, RTP-over-TCP"
 msgstr ""
 
 msgid "Active SAT>IP servers:"

po/es_ES.po

@@ -85,6 +85,15 @@ msgstr "Normal"
 msgid "high"
 msgstr "Alto"
 
+msgid "Unicast"
+msgstr ""
+
+msgid "Multicast"
+msgstr ""
+
+msgid "RTP-over-TCP"
+msgstr ""
+
 msgid "Button$Devices"
 msgstr "Dispositivos"
 
@@ -178,13 +187,13 @@ msgstr "Filtra"
 msgid "Define an ill-behaving filter to be blacklisted."
 msgstr "Define un filtro para poner en la lista negra."
 
-msgid "Use RTP-over-TCP mode"
+msgid "Transport mode"
 msgstr ""
 
 msgid ""
-"Define whether the RTP-over-TCP mode shall be used.\n"
+"Define which transport mode shall be used.\n"
 "\n"
-"This setting affects only SAT>IP devices supporting the feature."
+"Unicast, Multicast, RTP-over-TCP"
 msgstr ""
 
 msgid "Active SAT>IP servers:"

po/fi_FI.po

@@ -85,6 +85,15 @@ msgstr "normaali"
 msgid "high"
 msgstr "korkea"
 
+msgid "Unicast"
+msgstr "Unicast"
+
+msgid "Multicast"
+msgstr "Multicast"
+
+msgid "RTP-over-TCP"
+msgstr "RTP-over-TCP"
+
 msgid "Button$Devices"
 msgstr "Laitteet"
 
@@ -177,17 +186,17 @@ msgstr "Suodatin"
 msgid "Define an ill-behaving filter to be blacklisted."
 msgstr "Määrittele käytöstä poistettava suodatin, joka lisätään mustalle listalle."
 
-msgid "Use RTP-over-TCP mode"
+msgid "Transport mode"
-msgstr "Käytä RTP-over-TCP -moodia"
+msgstr "Siirtoyhteystapa"
 
 msgid ""
-"Define whether the RTP-over-TCP mode shall be used.\n"
+"Define which transport mode shall be used.\n"
 "\n"
-"This setting affects only SAT>IP devices supporting the feature."
+"Unicast, Multicast, RTP-over-TCP"
 msgstr ""
-"Määrittele RTP-over-TCP -moodin käyttöönotto.\n"
+"Määrittele käytettävä siirtoyhteystapa.\n"
 "\n"
-"Tämä asetus vaikuttaa vain SAT>IP-laitteisiin, jotka tukevat kyseistä ominaisuutta."
+"Unicast, Multicast, RTP-over-TCP"
 
 msgid "Active SAT>IP servers:"
 msgstr "Aktiiviset SAT>IP-palvelimet:"

rtsp.c

@@ -17,7 +17,6 @@ cSatipRtsp::cSatipRtsp(cSatipTunerIf &tunerP)
 : tunerM(tunerP),
   headerBufferM(),
   dataBufferM(),
-  modeM(cmUnicast),
   handleM(NULL),
   headerListM(NULL),
   errorNoMoreM(""),
@@ -182,13 +181,12 @@ bool cSatipRtsp::Setup(const char *uriP, int rtpPortP, int rtcpPortP, bool useTc
      cTimeMs processing(0);
      CURLcode res = CURLE_OK;
 
-     switch (modeM) {
+     switch (SatipConfig.GetTransportMode()) {
-       case cmMulticast:
+       case cSatipConfig::eTransportModeMulticast:
-            // RTP/AVP;multicast;destination=<IP multicast address>;port=<RTP port>-<RTCP port>;ttl=<ttl>
+            // RTP/AVP;multicast;destination=<multicast group address>;port=<RTP port>-<RTCP port>;ttl=<ttl>[;source=<multicast source address>]
-            transport = cString::sprintf("RTP/AVP;multicast;port=%d-%d", rtpPortP, rtcpPortP);
+            transport = cString::sprintf("RTP/AVP;multicast");
             break;
        default:
-       case cmUnicast:
             // RTP/AVP;unicast;client_port=<client RTP port>-<client RTCP port>
             // RTP/AVP/TCP;unicast;client_port=<client RTP port>-<client RTCP port>
             transport = cString::sprintf("RTP/AVP%s;unicast;client_port=%d-%d", useTcpP ? "/TCP" : "", rtpPortP, rtcpPortP);
@@ -352,6 +350,26 @@ void cSatipRtsp::ParseHeader(void)
               tunerM.SetSessionTimeout(skipspace(session), -1);
            FREE_POINTER(session);
            }
+        else if (strstr(r, "Transport:")) {
+           int rtp = -1, rtcp = -1, ttl = -1;
+           char *tmp = NULL, *destination = NULL, *source = NULL;
+           if (sscanf(r, "Transport:%m[^;];unicast;client_port=%11d-%11d", &tmp, &rtp, &rtcp) == 3)
+              tunerM.SetupTransport(rtp, rtcp, NULL, NULL);
+           else if (sscanf(r, "Transport:%m[^;];multicast;destination=%m[^;];port=%11d-%11d;ttl=%11d;source=%m[^;]", &tmp, &destination, &rtp, &rtcp, &ttl, &source) == 6 ||
+                    sscanf(r, "Transport:%m[^;];multicast;destination=%m[^;];port=%11d-%11d;ttl=%11d", &tmp, &destination, &rtp, &rtcp, &ttl) == 5)
+              tunerM.SetupTransport(rtp, rtcp, destination, source);
+           // TODO: else if (sscanf(r, "Transport:%m[^;];interleaved=%11d-%11d", &tmp, &rtp, &rtcp) == 3)
+           // Stream data such as RTP packets is encapsulated by an ASCII dollar
+           // sign (24 hexadecimal), followed by a one-byte channel identifier,
+           // followed by the length of the encapsulated binary data as a binary,
+           // two-byte integer in network byte order. The stream data follows
+           // immediately afterwards, without a CRLF, but including the upper-layer
+           // protocol headers. Each $ block contains exactly one upper-layer
+           // protocol data unit, e.g., one RTP packet.
+           FREE_POINTER(tmp);
+           FREE_POINTER(destination);
+           FREE_POINTER(source);
+           }
         r = strtok_r(NULL, "\r\n", &s);
         }
 }

rtsp.h

@@ -27,12 +27,10 @@ private:
   enum {
     eConnectTimeoutMs = 1500,  // in milliseconds
   };
-  enum eCommunicationMode { cmUnicast, cmMulticast };
 
   cSatipTunerIf &tunerM;
   cSatipMemoryBuffer headerBufferM;
   cSatipMemoryBuffer dataBufferM;
-  eCommunicationMode modeM;
   CURL *handleM;
   struct curl_slist *headerListM;
   cString errorNoMoreM;

satip.c

@@ -305,7 +305,12 @@ void cPluginSatip::ParsePortRange(const char *paramP)
      rangeStart = 0;
      rangeStop = 0;
      }
-  if (rangeStop - rangeStart + 1 < deviceCountM * 2) {
+  if (rangeStart % 2) {
+     error("The given range start port must be even!");
+     rangeStart = 0;
+     rangeStop = 0;
+     }
+  else if (rangeStop - rangeStart + 1 < deviceCountM * 2) {
      error("The given port range is to small: %d < %d!", rangeStop - rangeStart + 1, deviceCountM * 2);
      rangeStart = 0;
      rangeStop = 0;
@@ -401,8 +406,8 @@ bool cPluginSatip::SetupParse(const char *nameP, const char *valueP)
      for (unsigned int i = 0; i < DisabledFiltersCount; ++i)
          SatipConfig.SetDisabledFilters(i, DisabledFilters[i]);
      }
-  else if (!strcasecmp(nameP, "UseRtpOverTcp"))
+  else if (!strcasecmp(nameP, "TransportMode"))
-     SatipConfig.SetUseRtpOverTcp(atoi(valueP));
+     SatipConfig.SetTransportMode(atoi(valueP));
   else
      return false;
   return true;

setup.c

@@ -344,8 +344,8 @@ eOSState cSatipMenuInfo::ProcessKey(eKeys keyP)
 cSatipPluginSetup::cSatipPluginSetup()
 : detachedModeM(SatipConfig.GetDetachedMode()),
   deviceCountM(0),
-  useRtpOverTcpM(SatipConfig.GetUseRtpOverTcp()),
   operatingModeM(SatipConfig.GetOperatingMode()),
+  transportModeM(SatipConfig.GetTransportMode()),
   ciExtensionM(SatipConfig.GetCIExtension()),
   eitScanM(SatipConfig.GetEITScan()),
   numDisabledSourcesM(SatipConfig.GetDisabledSourcesCount()),
@@ -356,6 +356,9 @@ cSatipPluginSetup::cSatipPluginSetup()
   operatingModeTextsM[cSatipConfig::eOperatingModeLow]    = tr("low");
   operatingModeTextsM[cSatipConfig::eOperatingModeNormal] = tr("normal");
   operatingModeTextsM[cSatipConfig::eOperatingModeHigh]   = tr("high");
+  transportModeTextsM[cSatipConfig::eTransportModeUnicast]    = tr("Unicast");
+  transportModeTextsM[cSatipConfig::eTransportModeMulticast]  = tr("Multicast");
+  transportModeTextsM[cSatipConfig::eTransportModeRtpOverTcp] = tr("RTP-over-TCP");
   for (unsigned int i = 0; i < ELEMENTS(cicamsM); ++i)
       cicamsM[i] = SatipConfig.GetCICAM(i);
   for (unsigned int i = 0; i < ELEMENTS(ca_systems_table); ++i)
@@ -413,8 +416,8 @@ void cSatipPluginSetup::Setup(void)
          helpM.Append(tr("Define an ill-behaving filter to be blacklisted."));
          }
      }
-  Add(new cMenuEditBoolItem(tr("Use RTP-over-TCP mode"), &useRtpOverTcpM));
+  Add(new cMenuEditStraItem(tr("Transport mode"), &transportModeM, ELEMENTS(transportModeTextsM) - 1, transportModeTextsM)); // TODO: RTP-over-TCP
-  helpM.Append(tr("Define whether the RTP-over-TCP mode shall be used.\n\nThis setting affects only SAT>IP devices supporting the feature."));
+  helpM.Append(tr("Define which transport mode shall be used.\n\nUnicast, Multicast, RTP-over-TCP"));
   Add(new cOsdItem(tr("Active SAT>IP servers:"), osUnknown, false));
   helpM.Append("");
 
@@ -563,16 +566,16 @@ void cSatipPluginSetup::StoreFilters(const char *nameP, int *valuesP)
 void cSatipPluginSetup::Store(void)
 {
   // Store values into setup.conf
-  SetupStore("UseRtpOverTcp", useRtpOverTcpM);
   SetupStore("OperatingMode", operatingModeM);
+  SetupStore("TransportMode", transportModeM);
   SetupStore("EnableCIExtension", ciExtensionM);
   SetupStore("EnableEITScan", eitScanM);
   StoreCicams("CICAM", cicamsM);
   StoreSources("DisabledSources", disabledSourcesM);
   StoreFilters("DisabledFilters", disabledFilterIndexesM);
   // Update global config
-  SatipConfig.SetUseRtpOverTcp(useRtpOverTcpM);
   SatipConfig.SetOperatingMode(operatingModeM);
+  SatipConfig.SetTransportMode(transportModeM);
   SatipConfig.SetCIExtension(ciExtensionM);
   SatipConfig.SetEITScan(eitScanM);
   for (int i = 0; i < MAX_CICAM_COUNT; ++i)

setup.h

@@ -17,9 +17,10 @@ class cSatipPluginSetup : public cMenuSetupPage
 private:
   bool detachedModeM;
   int deviceCountM;
-  int useRtpOverTcpM;
   int operatingModeM;
+  int transportModeM;
   const char *operatingModeTextsM[cSatipConfig::eOperatingModeCount];
+  const char *transportModeTextsM[cSatipConfig::eTransportModeCount];
   int ciExtensionM;
   int cicamsM[MAX_CICAM_COUNT];
   const char *cicamTextsM[CA_SYSTEMS_TABLE_SIZE];

socket.c

@@ -21,7 +21,11 @@
 
 cSatipSocket::cSatipSocket()
 : socketPortM(0),
-  socketDescM(-1)
+  socketDescM(-1),
+  isMulticastM(false),
+  useSsmM(false),
+  streamAddrM(htonl(INADDR_ANY)),
+  sourceAddrM(htonl(INADDR_ANY))
 {
   debug1("%s", __PRETTY_FUNCTION__);
   memset(&sockAddrM, 0, sizeof(sockAddrM));
@@ -36,6 +40,12 @@ cSatipSocket::~cSatipSocket()
 
 bool cSatipSocket::Open(const int portP, const bool reuseP)
 {
+  // If socket is there already and it is bound to a different port, it must
+  // be closed first
+  if (portP != socketPortM) {
+     debug1("%s (%d, %d) Socket tear-down", __PRETTY_FUNCTION__, portP, reuseP);
+     Close();
+     }
   // Bind to the socket if it is not active already
   if (socketDescM < 0) {
      int yes;
@@ -55,6 +65,11 @@ bool cSatipSocket::Open(const int portP, const bool reuseP)
      ERROR_IF_FUNC(setsockopt(socketDescM, SOL_SOCKET, SO_REUSEPORT, &yes, sizeof(yes)) < 0 && errno != ENOPROTOOPT,
                    "setsockopt(SO_REUSEPORT)", Close(), return false);
 #endif
+#ifndef __FreeBSD__
+     // Allow packet information to be fetched
+     ERROR_IF_FUNC(setsockopt(socketDescM, SOL_IP, IP_PKTINFO, &yes, sizeof(yes)) < 0,
+                   "setsockopt(IP_PKTINFO)", Close(), return false);
+#endif // __FreeBSD__
      // Bind socket
      memset(&sockAddrM, 0, sizeof(sockAddrM));
      sockAddrM.sin_family = AF_INET;
@@ -63,23 +78,41 @@ bool cSatipSocket::Open(const int portP, const bool reuseP)
      ERROR_IF_FUNC(bind(socketDescM, (struct sockaddr *)&sockAddrM, sizeof(sockAddrM)) < 0,
                    "bind()", Close(), return false);
      // Update socket port
-     ERROR_IF_FUNC(getsockname(socketDescM,(struct sockaddr*)&sockAddrM, &len) < 0,
+     ERROR_IF_FUNC(getsockname(socketDescM, (struct sockaddr*)&sockAddrM, &len) < 0,
                    "getsockname()", Close(), return false);
      socketPortM = ntohs(sockAddrM.sin_port);
+     isMulticastM = false;
      }
   debug1("%s (%d) socketPort=%d", __PRETTY_FUNCTION__, portP, socketPortM);
   return true;
 }
 
+bool cSatipSocket::OpenMulticast(const int portP, const char *streamAddrP, const char *sourceAddrP)
+{
+  debug1("%s (%d, %s, %s)", __PRETTY_FUNCTION__, portP, streamAddrP, sourceAddrP);
+  if (Open(portP)) {
+     CheckAddress(streamAddrP, &streamAddrM);
+     if (!isempty(sourceAddrP))
+        useSsmM = CheckAddress(sourceAddrP, &sourceAddrM);
+     return Join();
+     }
+  return false;
+}
+
 void cSatipSocket::Close(void)
 {
   debug1("%s sockerPort=%d", __PRETTY_FUNCTION__, socketPortM);
   // Check if socket exists
   if (socketDescM >= 0) {
+     Leave();
      close(socketDescM);
      socketDescM = -1;
      socketPortM = 0;
      memset(&sockAddrM, 0, sizeof(sockAddrM));
+     streamAddrM = htonl(INADDR_ANY);
+     sourceAddrM = htonl(INADDR_ANY);
+     isMulticastM = false;
+     useSsmM = false;
      }
 }
 
@@ -102,6 +135,96 @@ bool cSatipSocket::Flush(void)
   return false;
 }
 
+bool cSatipSocket::CheckAddress(const char *addrP, in_addr_t *inAddrP)
+{
+  if (inAddrP) {
+     // First try only the IP address
+     *inAddrP = inet_addr(addrP);
+     if (*inAddrP == htonl(INADDR_NONE)) {
+        debug1("%s (%s, ) Cannot convert to address", __PRETTY_FUNCTION__, addrP);
+        // It may be a host name, get the name
+        struct hostent *host = gethostbyname(addrP);
+        if (!host) {
+           char tmp[64];
+           error("gethostbyname() failed: %s is not valid address: %s", addrP,
+                 strerror_r(h_errno, tmp, sizeof(tmp)));
+           return false;
+           }
+        *inAddrP = inet_addr(*host->h_addr_list);
+        }
+     return true;
+     }
+  return false;
+}
+
+bool cSatipSocket::Join(void)
+{
+  debug1("%s", __PRETTY_FUNCTION__);
+  // Check if socket exists
+  if (socketDescM >= 0 && !isMulticastM) {
+     // Join a new multicast group
+     if (useSsmM) {
+        // Source-specific multicast (SSM) is used
+        struct group_source_req gsr;
+        struct sockaddr_in *grp;
+        struct sockaddr_in *src;
+        gsr.gsr_interface = 0; // if_nametoindex("any") ?
+        grp = (struct sockaddr_in*)&gsr.gsr_group;
+        grp->sin_family = AF_INET;
+        grp->sin_addr.s_addr = streamAddrM;
+        grp->sin_port = 0;
+        src = (struct sockaddr_in*)&gsr.gsr_source;
+        src->sin_family = AF_INET;
+        src->sin_addr.s_addr = sourceAddrM;
+        src->sin_port = 0;
+        ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, MCAST_JOIN_SOURCE_GROUP, &gsr, sizeof(gsr)) < 0, "setsockopt(MCAST_JOIN_SOURCE_GROUP)", return false);
+        }
+     else {
+        struct ip_mreq mreq;
+        mreq.imr_multiaddr.s_addr = streamAddrM;
+        mreq.imr_interface.s_addr = htonl(INADDR_ANY);
+        ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0, "setsockopt(IP_ADD_MEMBERSHIP)", return false);
+        }
+     // Update multicasting flag
+     isMulticastM = true;
+     }
+  return true;
+}
+
+bool cSatipSocket::Leave(void)
+{
+  debug1("%s", __PRETTY_FUNCTION__);
+  // Check if socket exists
+  if (socketDescM >= 0 && isMulticastM) {
+     // Leave the existing multicast group
+     if (useSsmM) {
+        // Source-specific multicast (SSM) is used
+        struct group_source_req gsr;
+        struct sockaddr_in *grp;
+        struct sockaddr_in *src;
+        gsr.gsr_interface = 0; // if_nametoindex("any") ?
+        grp = (struct sockaddr_in*)&gsr.gsr_group;
+        grp->sin_family = AF_INET;
+        grp->sin_addr.s_addr = streamAddrM;
+        grp->sin_port = 0;
+        src = (struct sockaddr_in*)&gsr.gsr_source;
+        src->sin_family = AF_INET;
+        src->sin_addr.s_addr = sourceAddrM;
+        src->sin_port = 0;
+        ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, MCAST_LEAVE_SOURCE_GROUP, &gsr, sizeof(gsr)) < 0, "setsockopt(MCAST_LEAVE_SOURCE_GROUP)", return false);
+        }
+     else {
+        struct ip_mreq mreq;
+        mreq.imr_multiaddr.s_addr = streamAddrM;
+        mreq.imr_interface.s_addr = htonl(INADDR_ANY);
+        ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0, "setsockopt(IP_DROP_MEMBERSHIP)", return false);
+        }
+     // Update multicasting flag
+     isMulticastM = false;
+     }
+  return true;
+}
+
 int cSatipSocket::Read(unsigned char *bufferAddrP, unsigned int bufferLenP)
 {
   debug16("%s (, %d)", __PRETTY_FUNCTION__, bufferLenP);
@@ -132,8 +255,22 @@ int cSatipSocket::Read(unsigned char *bufferAddrP, unsigned int bufferLenP)
 
     if (socketDescM && bufferAddrP && (bufferLenP > 0))
        len = (int)recvmsg(socketDescM, &msgh, MSG_DONTWAIT);
-    if (len > 0)
+    if (len > 0) {
+#ifndef __FreeBSD__
+       if (isMulticastM) {
+          // Process auxiliary received data and validate source address
+          for (struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msgh); 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 == streamAddrM) || (htonl(INADDR_ANY) == streamAddrM))
                     return len;
+                 }
+              }
+          }
+       else
+#endif // __FreeBSD__
+          return len;
+       }
     } while (len > 0);
   ERROR_IF_RET(len < 0 && errno != EAGAIN && errno != EWOULDBLOCK, "recvmsg()", return -1);
   return 0;

socket.h

@@ -15,14 +15,23 @@ private:
   int socketPortM;
   int socketDescM;
   struct sockaddr_in sockAddrM;
+  bool isMulticastM;
+  bool useSsmM;
+  in_addr_t streamAddrM;
+  in_addr_t sourceAddrM;
+  bool CheckAddress(const char *addrP, in_addr_t *inAddrP);
+  bool Join(void);
+  bool Leave(void);
 
 public:
   cSatipSocket();
   virtual ~cSatipSocket();
   bool Open(const int portP = 0, const bool reuseP = false);
+  bool OpenMulticast(const int portP, const char *streamAddrP, const char *sourceAddrP);
   virtual void Close(void);
   int Fd(void) { return socketDescM; }
   int Port(void) { return socketPortM; }
+  bool IsMulticast(void) { return isMulticastM; }
   bool IsOpen(void) { return (socketDescM >= 0); }
   bool Flush(void);
   int Read(unsigned char *bufferAddrP, unsigned int bufferLenP);

tuner.c

@@ -55,12 +55,13 @@ cSatipTuner::cSatipTuner(cSatipDeviceIf &deviceP, unsigned int packetLenP)
   int i = SatipConfig.GetPortRangeStart() ? SatipConfig.GetPortRangeStop() - SatipConfig.GetPortRangeStart() - 1 : 100;
   int port = SatipConfig.GetPortRangeStart();
   while (i-- > 0) {
-        if (rtpM.Open(port) && rtcpM.Open(rtpM.Port() + 1))
+        // RTP must use an even port number
+        if (rtpM.Open(port) && (rtpM.Port() % 2 == 0) && rtcpM.Open(rtpM.Port() + 1))
            break;
         rtpM.Close();
         rtcpM.Close();
         if (SatipConfig.GetPortRangeStart())
-           ++port;
+           port += 2;
         }
   if ((rtpM.Port() <= 0) || (rtcpM.Port() <= 0)) {
      error("Cannot open required RTP/RTCP ports [device %d]", deviceIdM);
@@ -223,7 +224,7 @@ bool cSatipTuner::Connect(void)
         }
      else if (rtspM.Options(*connectionUri)) {
         cString uri = cString::sprintf("%s?%s", *connectionUri, *streamParamM);
-        bool useTcp = SatipConfig.GetUseRtpOverTcp() && nextServerM.IsValid() && nextServerM.IsQuirk(cSatipServer::eSatipQuirkRtpOverTcp);
+        bool useTcp = SatipConfig.IsTransportModeRtpOverTcp() && nextServerM.IsValid() && nextServerM.IsQuirk(cSatipServer::eSatipQuirkRtpOverTcp);
         // Flush any old content
         //rtpM.Flush();
         //rtcpM.Flush();
@@ -366,6 +367,33 @@ void cSatipTuner::SetSessionTimeout(const char *sessionP, int timeoutP)
   timeoutM = (timeoutP > eMinKeepAliveIntervalMs) ? timeoutP : eMinKeepAliveIntervalMs;
 }
 
+void cSatipTuner::SetupTransport(int rtpPortP, int rtcpPortP, const char *streamAddrP, const char *sourceAddrP)
+{
+  cMutexLock MutexLock(&mutexM);
+  debug1("%s (%d, %d, %s, %s) [device %d]", __PRETTY_FUNCTION__, rtpPortP, rtcpPortP, streamAddrP, sourceAddrP, deviceIdM);
+  bool multicast = !isempty(streamAddrP);
+  // Adapt RTP to any transport media change
+  if (multicast != rtpM.IsMulticast() || rtpPortP != rtpM.Port()) {
+     cSatipPoller::GetInstance()->Unregister(rtpM);
+     rtpM.Close();
+     if (multicast)
+        rtpM.OpenMulticast(rtpPortP, streamAddrP, sourceAddrP);
+     else
+        rtpM.Open(rtpPortP);
+     cSatipPoller::GetInstance()->Register(rtpM);
+     }
+  // Adapt RTCP to any transport media change
+  if (multicast != rtcpM.IsMulticast() || rtcpPortP != rtcpM.Port()) {
+     cSatipPoller::GetInstance()->Unregister(rtcpM);
+     rtcpM.Close();
+     if (multicast)
+        rtcpM.OpenMulticast(rtpPortP, streamAddrP, sourceAddrP);
+     else
+        rtcpM.Open(rtpPortP);
+     cSatipPoller::GetInstance()->Register(rtcpM);
+     }
+}
+
 cString cSatipTuner::GetBaseUrl(const char *addressP, const int portP)
 {
   debug16("%s (%s, %d) [device %d]", __PRETTY_FUNCTION__, addressP, portP, deviceIdM);

tuner.h

@@ -159,6 +159,7 @@ public:
   virtual void ProcessApplicationData(u_char *bufferP, int lengthP);
   virtual void SetStreamId(int streamIdP);
   virtual void SetSessionTimeout(const char *sessionP, int timeoutP);
+  virtual void SetupTransport(int rtpPortP, int rtcpPortP, const char *streamAddrP, const char *sourceAddrP);
   virtual int GetId(void);
 };
 

tunerif.h

@@ -16,6 +16,7 @@ public:
   virtual void ProcessApplicationData(u_char *bufferP, int lengthP) = 0;
   virtual void SetStreamId(int streamIdP) = 0;
   virtual void SetSessionTimeout(const char *sessionP, int timeoutP) = 0;
+  virtual void SetupTransport(int rtpPortP, int rtcpPortP, const char *streamAddrP, const char *sourceAddrP) = 0;
   virtual int GetId(void) = 0;
 
 private: