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vdr-plugin-iptv/protocoludp.c

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/*
* protocoludp.c: IPTV plugin for the Video Disk Recorder
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*
* See the README file for copyright information and how to reach the author.
*
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* $Id: protocoludp.c,v 1.22 2008/01/04 23:36:37 ajhseppa Exp $
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*/
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <fcntl.h>
#include <unistd.h>
#include <vdr/device.h>
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#include "common.h"
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#include "config.h"
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#include "protocoludp.h"
#include "socket.h"
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cIptvProtocolUdp::cIptvProtocolUdp()
{
debug("cIptvProtocolUdp::cIptvProtocolUdp()\n");
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streamAddr = strdup("");
}
cIptvProtocolUdp::~cIptvProtocolUdp()
{
debug("cIptvProtocolUdp::~cIptvProtocolUdp()\n");
// Drop the multicast group and close the socket
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cIptvProtocolUdp::Close();
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// Free allocated memory
free(streamAddr);
}
bool cIptvProtocolUdp::JoinMulticast(void)
{
debug("cIptvProtocolUdp::JoinMulticast()\n");
// Check that stream address is valid
if (!isActive && !isempty(streamAddr)) {
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// Ensure that socket is valid
OpenSocket(socketPort);
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// Join a new multicast group
struct ip_mreq mreq;
mreq.imr_multiaddr.s_addr = inet_addr(streamAddr);
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
int err = setsockopt(socketDesc, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq,
sizeof(mreq));
ERROR_IF_RET(err < 0, "setsockopt()", return false);
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// Update multicasting flag
isActive = true;
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}
return true;
}
bool cIptvProtocolUdp::DropMulticast(void)
{
debug("cIptvProtocolUdp::DropMulticast()\n");
// Check that stream address is valid
if (isActive && !isempty(streamAddr)) {
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// Ensure that socket is valid
OpenSocket(socketPort);
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// Drop the multicast group
struct ip_mreq mreq;
mreq.imr_multiaddr.s_addr = inet_addr(streamAddr);
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
int err = setsockopt(socketDesc, IPPROTO_IP, IP_DROP_MEMBERSHIP, &mreq,
sizeof(mreq));
ERROR_IF_RET(err < 0, "setsockopt()", return false);
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// Update multicasting flag
isActive = false;
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}
return true;
}
bool cIptvProtocolUdp::Open(void)
{
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debug("cIptvProtocolUdp::Open()\n");
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// Join a new multicast group
JoinMulticast();
return true;
}
bool cIptvProtocolUdp::Close(void)
{
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debug("cIptvProtocolUdp::Close()\n");
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// Drop the multicast group
DropMulticast();
// Close the socket
CloseSocket();
return true;
}
int cIptvProtocolUdp::Read(unsigned char* *BufferAddr)
{
return cIptvUdpSocket::Read(BufferAddr);
}
bool cIptvProtocolUdp::Set(const char* Location, const int Parameter, const int Index)
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{
debug("cIptvProtocolUdp::Set(): Location=%s Parameter=%d Index=%d\n", Location, Parameter, Index);
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if (!isempty(Location)) {
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// Drop the multicast group
DropMulticast();
// Update stream address and port
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streamAddr = strcpyrealloc(streamAddr, Location);
socketPort = Parameter;
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// Join a new multicast group
JoinMulticast();
}
return true;
}
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cString cIptvProtocolUdp::GetInformation(void)
{
//debug("cIptvProtocolUdp::GetInformation()");
return cString::sprintf("udp://%s:%d", streamAddr, socketPort);
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}