frodovdr/vdr-plugin-iptv
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Tweaked reading from UDP sockets.

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This commit is contained in:
Rolf Ahrenberg 2012-06-02 13:32:28 +03:00
parent 06506c41f6
commit c7cbde301b
3 changed files with 37 additions and 35 deletions
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4
HISTORY
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@ -172,3 +172,7 @@ VDR Plugin 'iptv' Revision History
2012-04-26: Version 0.5.2 2012-04-26: Version 0.5.2
- Fixed connection problems in HTTP protocol. - Fixed connection problems in HTTP protocol.
2012-xx-xx: Version 0.5.3
- Tweaked reading from UDP sockets.

2
iptv.c
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@ -21,7 +21,7 @@
#define GITVERSION "" #define GITVERSION ""
#endif #endif
const char VERSION[] = "0.5.2" GITVERSION; const char VERSION[] = "0.5.3" GITVERSION;
static const char DESCRIPTION[] = trNOOP("Experience the IPTV"); static const char DESCRIPTION[] = trNOOP("Experience the IPTV");
class cPluginIptv : public cPlugin { class cPluginIptv : public cPlugin {

66
socket.c
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@ -180,45 +180,43 @@ int cIptvUdpSocket::Read(unsigned char* BufferAddr, unsigned int BufferLen)
} }
else if (len > 0) { else if (len > 0) {
// Process auxiliary received data and validate source address // Process auxiliary received data and validate source address
for (cmsg = CMSG_FIRSTHDR(&msgh); (streamAddr != INADDR_ANY) && (cmsg != NULL); cmsg = CMSG_NXTHDR(&msgh, cmsg)) { for (cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL; cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
if ((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_PKTINFO)) { if ((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_PKTINFO)) {
struct in_pktinfo *i = (struct in_pktinfo *)CMSG_DATA(cmsg); struct in_pktinfo *i = (struct in_pktinfo *)CMSG_DATA(cmsg);
if (i->ipi_addr.s_addr != streamAddr) { if ((i->ipi_addr.s_addr == streamAddr) || (INADDR_ANY == streamAddr)) {
//debug("Discard packet due to invalid source address: %s", inet_ntoa(i->ipi_addr)); if (BufferAddr[0] == TS_SYNC_BYTE)
return 0; return len;
else if (len > 3) {
// http://www.networksorcery.com/enp/rfc/rfc2250.txt
// version
unsigned int v = (BufferAddr[0] >> 6) & 0x03;
// extension bit
unsigned int x = (BufferAddr[0] >> 4) & 0x01;
// cscr count
unsigned int cc = BufferAddr[0] & 0x0F;
// payload type: MPEG2 TS = 33
//unsigned int pt = readBuffer[1] & 0x7F;
// header lenght
unsigned int headerlen = (3 + cc) * (unsigned int)sizeof(uint32_t);
// check if extension
if (x) {
// extension header length
unsigned int ehl = (((BufferAddr[headerlen + 2] & 0xFF) << 8) |
(BufferAddr[headerlen + 3] & 0xFF));
// update header length
headerlen += (ehl + 1) * (unsigned int)sizeof(uint32_t);
}
// Check that rtp is version 2 and payload contains multiple of TS packet data
if ((v == 2) && (((len - headerlen) % TS_SIZE) == 0) &&
(BufferAddr[headerlen] == TS_SYNC_BYTE)) {
// Set argument point to payload in read buffer
memmove(BufferAddr, &BufferAddr[headerlen], (len - headerlen));
return (len - headerlen);
}
}
} }
} }
} }
if (BufferAddr[0] == TS_SYNC_BYTE)
return len;
else if (len > 3) {
// http://www.networksorcery.com/enp/rfc/rfc2250.txt
// version
unsigned int v = (BufferAddr[0] >> 6) & 0x03;
// extension bit
unsigned int x = (BufferAddr[0] >> 4) & 0x01;
// cscr count
unsigned int cc = BufferAddr[0] & 0x0F;
// payload type: MPEG2 TS = 33
//unsigned int pt = readBuffer[1] & 0x7F;
// header lenght
unsigned int headerlen = (3 + cc) * (unsigned int)sizeof(uint32_t);
// check if extension
if (x) {
// extension header length
unsigned int ehl = (((BufferAddr[headerlen + 2] & 0xFF) << 8) |
(BufferAddr[headerlen + 3] & 0xFF));
// update header length
headerlen += (ehl + 1) * (unsigned int)sizeof(uint32_t);
}
// Check that rtp is version 2 and payload contains multiple of TS packet data
if ((v == 2) && (((len - headerlen) % TS_SIZE) == 0) &&
(BufferAddr[headerlen] == TS_SYNC_BYTE)) {
// Set argument point to payload in read buffer
memmove(BufferAddr, &BufferAddr[headerlen], (len - headerlen));
return (len - headerlen);
}
}
} }
return 0; return 0;
} }