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vdr-plugin-iptv
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vdr-plugin-iptv/protocolcurl.c

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/*
* protocolcurl.c: IPTV plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#include "common.h"
#include "config.h"
#include "log.h"
#include "protocolcurl.h"
#ifdef CURLOPT_RTSPHEADER
#define USE_RTSP
#endif
#define iptv_curl_easy_setopt(X, Y, Z) \
if ((res = curl_easy_setopt((X), (Y), (Z))) != CURLE_OK) { \
error("curl_easy_setopt(%s, %s) failed: %s (%d)", #Y, #Z, curl_easy_strerror(res), res); \
}
#define iptv_curl_easy_perform(X) \
if ((res = curl_easy_perform((X))) != CURLE_OK) { \
error("curl_easy_perform() failed: %s (%d)", curl_easy_strerror(res), res); \
}
cIptvProtocolCurl::cIptvProtocolCurl()
: streamUrlM(""),
streamParamM(0),
streamPortM(0),
mutexM(),
handleM(NULL),
multiM(NULL),
headerListM(NULL),
ringBufferM(new cRingBufferLinear(IPTV_BUFFER_SIZE, 7 * TS_SIZE, false, "IPTV CURL")),
rtspControlM(""),
modeM(eModeUnknown),
timeoutM(),
connectedM(false),
pausedM(false)
{
debug1("%s", __PRETTY_FUNCTION__);
if (ringBufferM) {
ringBufferM->SetTimeouts(100, 0);
ringBufferM->SetIoThrottle();
}
Connect();
}
cIptvProtocolCurl::~cIptvProtocolCurl()
{
debug1("%s", __PRETTY_FUNCTION__);
Disconnect();
// Free allocated memory
DELETE_POINTER(ringBufferM);
}
int cIptvProtocolCurl::DebugCallback(CURL *handleP, curl_infotype typeP, char *dataP, size_t sizeP, void *userPtrP)
{
cIptvProtocolCurl *obj = reinterpret_cast<cIptvProtocolCurl *>(dataP);
if (obj) {
switch (typeP) {
case CURLINFO_TEXT:
debug8("%s INFO %.*s", __PRETTY_FUNCTION__, (int)sizeP, dataP);
break;
case CURLINFO_HEADER_IN:
debug8("%s HEAD <<< %.*s", __PRETTY_FUNCTION__, (int)sizeP, dataP);
break;
case CURLINFO_HEADER_OUT:
debug8("%s HEAD >>>\n%.*s", __PRETTY_FUNCTION__, (int)sizeP, dataP);
break;
case CURLINFO_DATA_IN:
debug8("%s DATA <<< %zu", __PRETTY_FUNCTION__, sizeP);
break;
case CURLINFO_DATA_OUT:
debug8("%s DATA >>> %zu", __PRETTY_FUNCTION__, sizeP);
break;
default:
break;
}
}
return 0;
}
size_t cIptvProtocolCurl::WriteCallback(void *ptrP, size_t sizeP, size_t nmembP, void *dataP)
{
cIptvProtocolCurl *obj = reinterpret_cast<cIptvProtocolCurl *>(dataP);
size_t len = sizeP * nmembP;
debug16("%s (, %zu, %zu, ) len=%zu", __PRETTY_FUNCTION__, sizeP, nmembP, len);
if (obj && !obj->PutData((unsigned char *)ptrP, (int)len))
return CURL_WRITEFUNC_PAUSE;
return len;
}
size_t cIptvProtocolCurl::WriteRtspCallback(void *ptrP, size_t sizeP, size_t nmembP, void *dataP)
{
cIptvProtocolCurl *obj = reinterpret_cast<cIptvProtocolCurl *>(dataP);
size_t len = sizeP * nmembP;
unsigned char *p = (unsigned char *)ptrP;
debug16("%s (, %zu, %zu, ) len=%zu", __PRETTY_FUNCTION__, sizeP, nmembP, len);
// Validate packet header ('$') and channel (0)
if (obj && (p[0] == 0x24) && (p[1] == 0)) {
int length = (p[2] << 8) | p[3];
if (length > 3) {
// Skip interleave header
p += 4;
// http://tools.ietf.org/html/rfc3550
// http://tools.ietf.org/html/rfc2250
// Version
unsigned int v = (p[0] >> 6) & 0x03;
// Extension bit
unsigned int x = (p[0] >> 4) & 0x01;
// CSCR count
unsigned int cc = p[0] & 0x0F;
// Payload type: MPEG2 TS = 33
//unsigned int pt = p[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 = (((p[headerlen + 2] & 0xFF) << 8) |(p[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) && (((length - headerlen) % TS_SIZE) == 0) && (p[headerlen] == TS_SYNC_BYTE)) {
// Set argument point to payload in read buffer
obj->PutData(&p[headerlen], (length - headerlen));
}
}
}
return len;
}
size_t cIptvProtocolCurl::DescribeCallback(void *ptrP, size_t sizeP, size_t nmembP, void *dataP)
{
cIptvProtocolCurl *obj = reinterpret_cast<cIptvProtocolCurl *>(dataP);
size_t len = sizeP * nmembP;
debug16("%s (, %zu, %zu, ) len=%zu", __PRETTY_FUNCTION__, sizeP, nmembP, len);
bool found = false;
cString control = "";
char *p = (char *)ptrP;
char *r = strtok(p, "\r\n");
while (r) {
debug16("%s (, %zu, %zu, ) len=%zu r=%s", __PRETTY_FUNCTION__, sizeP, nmembP, len, r);
// Look for a media name: "video"
if (strstr(r, "m=video")) {
found = true;
}
// ... and find out its' attribute
if (found && strstr(r, "a=control")) {
char *s = NULL;
if (sscanf(r, "a=control:%255ms", &s) == 1)
control = compactspace(s);
free(s);
break;
}
r = strtok(NULL, "\r\n");
}
if (!isempty(*control) && obj)
obj->SetRtspControl(*control);
return len;
}
size_t cIptvProtocolCurl::HeaderCallback(void *ptrP, size_t sizeP, size_t nmembP, void *dataP)
{
//cIptvProtocolCurl *obj = reinterpret_cast<cIptvProtocolCurl *>(dataP);
size_t len = sizeP * nmembP;
debug16("%s (, %zu, %zu, ) len=%zu", __PRETTY_FUNCTION__, sizeP, nmembP, len);
char *p = (char *)ptrP;
char *r = strtok(p, "\r\n");
while (r) {
debug16("%s (, %zu, %zu, ) len=%zu r=%s", __PRETTY_FUNCTION__, sizeP, nmembP, len, r);
r = strtok(NULL, "\r\n");
}
return len;
}
void cIptvProtocolCurl::SetRtspControl(const char *controlP)
{
cMutexLock MutexLock(&mutexM);
debug16("%s (%s)", __PRETTY_FUNCTION__, controlP);
cString protocol = ChangeCase(controlP, false).Truncate(7);
if (startswith(*protocol, "rtsp://")) {
streamUrlM = controlP;
rtspControlM = "";
}
else
rtspControlM = controlP;
}
bool cIptvProtocolCurl::PutData(unsigned char *dataP, int lenP)
{
cMutexLock MutexLock(&mutexM);
debug16("%s (, %d)", __PRETTY_FUNCTION__, lenP);
if (pausedM)
return false;
if (ringBufferM && (lenP >= 0)) {
// Should we pause the transfer ?
if (ringBufferM->Free() < (2 * CURL_MAX_WRITE_SIZE)) {
debug1("%s Pause free=%d available=%d len=%d", __PRETTY_FUNCTION__,
ringBufferM->Free(), ringBufferM->Available(), lenP);
pausedM = true;
return false;
}
int p = ringBufferM->Put(dataP, lenP);
if (p != lenP)
ringBufferM->ReportOverflow(lenP - p);
}
return true;
}
void cIptvProtocolCurl::DelData(int lenP)
{
cMutexLock MutexLock(&mutexM);
debug16("%s", __PRETTY_FUNCTION__);
if (ringBufferM && (lenP >= 0))
ringBufferM->Del(lenP);
}
void cIptvProtocolCurl::ClearData()
{
debug16("%s", __PRETTY_FUNCTION__);
if (ringBufferM)
ringBufferM->Clear();
}
unsigned char *cIptvProtocolCurl::GetData(int &lenP)
{
cMutexLock MutexLock(&mutexM);
debug16("%s", __PRETTY_FUNCTION__);
unsigned char *p = NULL;
lenP = 0;
if (ringBufferM) {
int count = 0;
p = ringBufferM->Get(count);
#if 0
if (p && count >= TS_SIZE) {
if (*p != TS_SYNC_BYTE) {
for (int i = 1; i < count; ++i) {
if (p[i] == TS_SYNC_BYTE) {
count = i;
break;
}
}
error("IPTV skipped %d bytes to sync on TS packet", count);
ringBufferM->Del(count);
lenP = 0;
return NULL;
}
}
#endif
count -= (count % TS_SIZE);
lenP = count;
}
return p;
}
bool cIptvProtocolCurl::Connect()
{
cMutexLock MutexLock(&mutexM);
debug1("%s", __PRETTY_FUNCTION__);
if (connectedM)
return true;
// Initialize the curl session
if (!handleM)
handleM = curl_easy_init();
if (handleM && !isempty(*streamUrlM)) {
CURLcode res = CURLE_OK;
cString netrc = cString::sprintf("%s/netrc", IptvConfig.GetConfigDirectory());
// Verbose output
iptv_curl_easy_setopt(handleM, CURLOPT_VERBOSE, 1L);
iptv_curl_easy_setopt(handleM, CURLOPT_DEBUGFUNCTION, cIptvProtocolCurl::DebugCallback);
iptv_curl_easy_setopt(handleM, CURLOPT_DEBUGDATA, this);
// Set callbacks
iptv_curl_easy_setopt(handleM, CURLOPT_WRITEFUNCTION, cIptvProtocolCurl::WriteCallback);
iptv_curl_easy_setopt(handleM, CURLOPT_WRITEDATA, this);
iptv_curl_easy_setopt(handleM, CURLOPT_HEADERFUNCTION, cIptvProtocolCurl::HeaderCallback);
iptv_curl_easy_setopt(handleM, CURLOPT_WRITEHEADER, this);
// No progress meter and no signaling
iptv_curl_easy_setopt(handleM, CURLOPT_NOPROGRESS, 1L);
iptv_curl_easy_setopt(handleM, CURLOPT_NOSIGNAL, 1L);
// Support netrc
iptv_curl_easy_setopt(handleM, CURLOPT_NETRC, (long)CURL_NETRC_OPTIONAL);
iptv_curl_easy_setopt(handleM, CURLOPT_NETRC_FILE, *netrc);
// Set timeouts
iptv_curl_easy_setopt(handleM, CURLOPT_CONNECTTIMEOUT, (long)eConnectTimeoutS);
iptv_curl_easy_setopt(handleM, CURLOPT_LOW_SPEED_LIMIT, (long)eLowSpeedLimitBytes);
iptv_curl_easy_setopt(handleM, CURLOPT_LOW_SPEED_TIME, (long)eLowSpeedTimeoutS);
// Set user-agent
iptv_curl_easy_setopt(handleM, CURLOPT_USERAGENT, *cString::sprintf("vdr-%s/%s", PLUGIN_NAME_I18N, VERSION));
// Set URL
char *p = curl_easy_unescape(handleM, *streamUrlM, 0, NULL);
streamUrlM = p;
curl_free(p);
iptv_curl_easy_setopt(handleM, CURLOPT_URL, *streamUrlM);
// Protocol specific initializations
switch (modeM) {
#ifdef USE_RTSP
case eModeRtsp:
{
cString uri, control, transport, range;
// Create the listening socket for UDP mode
if (!streamParamM)
OpenSocket(streamPortM);
// Request server options
uri = cString::sprintf("%s", *streamUrlM);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_STREAM_URI, *uri);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_OPTIONS);
iptv_curl_easy_perform(handleM);
// Request session description - SDP is delivered in message body and not in the header!
iptv_curl_easy_setopt(handleM, CURLOPT_WRITEFUNCTION, cIptvProtocolCurl::DescribeCallback);
iptv_curl_easy_setopt(handleM, CURLOPT_WRITEDATA, this);
uri = cString::sprintf("%s", *streamUrlM);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_STREAM_URI, *uri);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_DESCRIBE);
iptv_curl_easy_perform(handleM);
iptv_curl_easy_setopt(handleM, CURLOPT_WRITEFUNCTION, NULL);
iptv_curl_easy_setopt(handleM, CURLOPT_WRITEDATA, NULL);
// Setup media stream
if (isempty(*rtspControlM))
uri = cString::sprintf("%s", *streamUrlM);
else
uri = cString::sprintf("%s/%s", *streamUrlM, *rtspControlM);
if (streamParamM)
transport = "RTP/AVP/TCP;unicast;interleaved=0-1";
else
transport = cString::sprintf("RTP/AVP;unicast;client_port=%d-%d", streamPortM, streamPortM + 1);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_STREAM_URI, *uri);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_TRANSPORT, *transport);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_SETUP);
iptv_curl_easy_perform(handleM);
// Start playing
uri = cString::sprintf("%s/", *streamUrlM);
range = "0.000-";
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_STREAM_URI, *uri);
//iptv_curl_easy_setopt(handleM, CURLOPT_RANGE, *range);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_PLAY);
iptv_curl_easy_perform(handleM);
// Start receiving
if (streamParamM) {
iptv_curl_easy_setopt(handleM, CURLOPT_INTERLEAVEFUNCTION, cIptvProtocolCurl::WriteRtspCallback);
iptv_curl_easy_setopt(handleM, CURLOPT_INTERLEAVEDATA, this);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_RECEIVE);
iptv_curl_easy_perform(handleM);
}
// Don't add handle into multi set
isActiveM = true;
}
break;
#endif
case eModeHttp:
case eModeHttps:
{
// Limit download speed (bytes/s)
iptv_curl_easy_setopt(handleM, CURLOPT_MAX_RECV_SPEED_LARGE, eMaxDownloadSpeedMBits * 131072L);
// Follow location
iptv_curl_easy_setopt(handleM, CURLOPT_FOLLOWLOCATION, 1L);
// Fail if HTTP return code is >= 400
iptv_curl_easy_setopt(handleM, CURLOPT_FAILONERROR, 1L);
// Set additional headers to prevent caching
headerListM = curl_slist_append(headerListM, "Cache-Control: no-store, no-cache, must-revalidate");
headerListM = curl_slist_append(headerListM, "Cache-Control: post-check=0, pre-check=0");
headerListM = curl_slist_append(headerListM, "Pragma: no-cache");
headerListM = curl_slist_append(headerListM, "Expires: Mon, 26 Jul 1997 05:00:00 GMT");
iptv_curl_easy_setopt(handleM, CURLOPT_HTTPHEADER, headerListM);
// Initialize multi set and add handle into it
if (!multiM)
multiM = curl_multi_init();
if (multiM)
curl_multi_add_handle(multiM, handleM);
}
break;
case eModeFile:
{
// Set timeout
iptv_curl_easy_setopt(handleM, CURLOPT_TIMEOUT_MS, 10L);
// Initialize multi set and add handle into it
if (!multiM)
multiM = curl_multi_init();
if (multiM)
curl_multi_add_handle(multiM, handleM);
}
break;
case eModeUnknown:
default:
break;
}
timeoutM.Set(eKeepAliveIntervalMs);
connectedM = true;
return true;
}
return false;
}
bool cIptvProtocolCurl::Disconnect()
{
cMutexLock MutexLock(&mutexM);
debug1("%s", __PRETTY_FUNCTION__);
if (!connectedM)
return true;
// Terminate curl session
if (handleM) {
// Remove handle from multi set
if (multiM) {
curl_multi_remove_handle(multiM, handleM);
curl_multi_cleanup(multiM);
multiM = NULL;
}
// Mode specific tricks
switch (modeM) {
#ifdef USE_RTSP
case eModeRtsp:
{
CURLcode res = CURLE_OK;
// Teardown rtsp session
cString uri = cString::sprintf("%s/", *streamUrlM);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_STREAM_URI, *uri);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_TEARDOWN);
iptv_curl_easy_perform(handleM);
rtspControlM = "";
isActiveM = false;
// Close the listening socket
CloseSocket();
}
break;
#endif
case eModeHttp:
case eModeHttps:
case eModeFile:
case eModeUnknown:
default:
break;
}
// Cleanup curl stuff
if (headerListM) {
curl_slist_free_all(headerListM);
headerListM = NULL;
}
curl_easy_cleanup(handleM);
handleM = NULL;
}
ClearData();
connectedM = false;
return true;
}
bool cIptvProtocolCurl::Open(void)
{
debug1("%s", __PRETTY_FUNCTION__);
return Connect();
}
bool cIptvProtocolCurl::Close(void)
{
debug1("%s", __PRETTY_FUNCTION__);
Disconnect();
return true;
}
int cIptvProtocolCurl::Read(unsigned char* bufferAddrP, unsigned int bufferLenP)
{
debug16("%s (, %u)", __PRETTY_FUNCTION__, bufferLenP);
int len = 0;
if (ringBufferM) {
// Fill up the buffer
if (handleM) {
switch (modeM) {
#ifdef USE_RTSP
case eModeRtsp:
{
cMutexLock MutexLock(&mutexM);
CURLcode res = CURLE_OK;
// Remember the heart beat
if (timeoutM.TimedOut()) {
debug1("%s KeepAlive", __PRETTY_FUNCTION__);
cString uri = cString::sprintf("%s", *streamUrlM);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_STREAM_URI, *uri);
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_OPTIONS);
iptv_curl_easy_perform(handleM);
timeoutM.Set(eKeepAliveIntervalMs);
}
// Check whether UDP or TCP mode used
if (streamParamM) {
iptv_curl_easy_setopt(handleM, CURLOPT_RTSP_REQUEST, (long)CURL_RTSPREQ_RECEIVE);
iptv_curl_easy_perform(handleM);
}
else
return cIptvUdpSocket::Read(bufferAddrP, bufferLenP);
}
break;
#endif
case eModeFile:
case eModeHttp:
case eModeHttps:
if (multiM) {
CURLMcode res;
int running_handles;
do {
cMutexLock MutexLock(&mutexM);
res = curl_multi_perform(multiM, &running_handles);
} while (res == CURLM_CALL_MULTI_PERFORM);
// Use 20% threshold before continuing to filling up the buffer.
mutexM.Lock();
if (pausedM && (ringBufferM->Available() < (IPTV_BUFFER_SIZE / 5))) {
debug1("%s Continue free=%d available=%d", __PRETTY_FUNCTION__,
ringBufferM->Free(), ringBufferM->Available());
pausedM = false;
curl_easy_pause(handleM, CURLPAUSE_CONT);
}
mutexM.Unlock();
// Check if end of file
if (running_handles == 0) {
int msgcount;
mutexM.Lock();
CURLMsg *msg = curl_multi_info_read(multiM, &msgcount);
mutexM.Unlock();
if (msg && (msg->msg == CURLMSG_DONE)) {
debug1("%s Done %s (%d)", __PRETTY_FUNCTION__,
curl_easy_strerror(msg->data.result), msg->data.result);
Disconnect();
Connect();
}
}
}
break;
case eModeUnknown:
default:
break;
}
}
// ... and try to empty it
unsigned char *p = GetData(len);
if (p && (len > 0)) {
len = min(len, (int)bufferLenP);
memcpy(bufferAddrP, p, len);
DelData(len);
debug16("%s Get %d bytes", __PRETTY_FUNCTION__, len);
}
}
return len;
}
bool cIptvProtocolCurl::SetSource(const char* locationP, const int parameterP, const int indexP)
{
debug1("%s (%s, %d, %d)", __PRETTY_FUNCTION__, locationP, parameterP, indexP);
if (!isempty(locationP)) {
// Disconnect
Disconnect();
// Update stream URL
streamUrlM = locationP;
cString protocol = ChangeCase(streamUrlM, false).Truncate(5);
if (startswith(*protocol, "rtsp"))
modeM = eModeRtsp;
else if (startswith(*protocol, "https"))
modeM = eModeHttps;
else if (startswith(*protocol, "http"))
modeM = eModeHttp;
else if (startswith(*protocol, "file"))
modeM = eModeFile;
else
modeM = eModeUnknown;
debug1("%s (%s, %d, %d) protocol=%s mode=%d", __PRETTY_FUNCTION__, locationP, parameterP, indexP, *protocol, modeM);
// Update stream parameter - force UDP mode for RTSP
streamParamM = (modeM == eModeRtsp) ? 0 : parameterP;
// Update listen port
streamPortM = IptvConfig.GetProtocolBasePort() + indexP * 2;
// Reconnect
Connect();
}
return true;
}
bool cIptvProtocolCurl::SetPid(int pidP, int typeP, bool onP)
{
debug16("%s (%d, %d, %d)", __PRETTY_FUNCTION__, pidP, typeP, onP);
return true;
}
cString cIptvProtocolCurl::GetInformation(void)
{
debug16("%s", __PRETTY_FUNCTION__);
return cString::sprintf("%s [%d]", *streamUrlM, streamParamM);
}
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