283 lines
7.9 KiB
C
283 lines
7.9 KiB
C
/*
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* protocolhttp.c: IPTV plugin for the Video Disk Recorder
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*
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* See the README file for copyright information and how to reach the author.
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*
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* $Id: protocolhttp.c,v 1.4 2007/09/20 21:45:51 rahrenbe Exp $
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <string.h>
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#include <vdr/device.h>
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#include "common.h"
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#include "config.h"
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#include "protocolhttp.h"
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cIptvProtocolHttp::cIptvProtocolHttp()
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: streamPort(1234),
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socketDesc(-1),
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unicastActive(false)
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{
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debug("cIptvProtocolHttp::cIptvProtocolHttp(): %d/%d packets\n",
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IptvConfig.GetHttpBufferSize(), IptvConfig.GetMaxBufferSize());
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streamAddr = strdup("");
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streamPath = strdup("/");
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// Allocate receive buffer
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readBuffer = MALLOC(unsigned char, (TS_SIZE * IptvConfig.GetMaxBufferSize()));
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if (!readBuffer)
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error("ERROR: MALLOC() failed in ProtocolHttp()");
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}
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cIptvProtocolHttp::~cIptvProtocolHttp()
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{
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debug("cIptvProtocolHttp::~cIptvProtocolHttp()\n");
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// Close the socket
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Close();
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// Free allocated memory
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free(streamPath);
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free(streamAddr);
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free(readBuffer);
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}
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bool cIptvProtocolHttp::OpenSocket(const int Port)
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{
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debug("cIptvProtocolHttp::OpenSocket()\n");
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// If socket is there already and it is bound to a different port, it must
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// be closed first
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if (Port != streamPort) {
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debug("cIptvProtocolHttp::OpenSocket(): Socket tear-down\n");
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CloseSocket();
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}
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// Bind to the socket if it is not active already
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if (socketDesc < 0) {
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int yes = 1;
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// Create socket
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socketDesc = socket(PF_INET, SOCK_STREAM, 0);
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if (socketDesc < 0) {
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char tmp[64];
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error("ERROR: socket(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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return false;
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}
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// Make it use non-blocking I/O to avoid stuck read calls
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if (fcntl(socketDesc, F_SETFL, O_NONBLOCK)) {
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char tmp[64];
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error("ERROR: fcntl(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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CloseSocket();
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return false;
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}
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// Allow multiple sockets to use the same PORT number
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if (setsockopt(socketDesc, SOL_SOCKET, SO_REUSEADDR, &yes,
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sizeof(yes)) < 0) {
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char tmp[64];
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error("ERROR: setsockopt(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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CloseSocket();
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return false;
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}
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// Create default socket
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memset(&sockAddr, '\0', sizeof(sockAddr));
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sockAddr.sin_family = AF_INET;
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sockAddr.sin_port = htons(Port);
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sockAddr.sin_addr.s_addr = htonl(INADDR_ANY);
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// Update stream port
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streamPort = Port;
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}
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return true;
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}
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void cIptvProtocolHttp::CloseSocket(void)
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{
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debug("cIptvProtocolHttp::CloseSocket()\n");
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// Check if socket exists
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if (socketDesc >= 0) {
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close(socketDesc);
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socketDesc = -1;
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}
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}
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bool cIptvProtocolHttp::Connect(void)
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{
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debug("cIptvProtocolHttp::Connect()\n");
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// Check that stream address is valid
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if (!unicastActive && !isempty(streamAddr) && !isempty(streamPath)) {
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// Ensure that socket is valid
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OpenSocket(streamPort);
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// First try only the IP address
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sockAddr.sin_addr.s_addr = inet_addr(streamAddr);
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if (sockAddr.sin_addr.s_addr == INADDR_NONE) {
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debug("Cannot convert %s directly to internet address\n", streamAddr);
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// It may be a host name, get the name
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struct hostent *host;
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host = gethostbyname(streamAddr);
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if (!host) {
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error("%s is not valid address\n", streamAddr);
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char tmp[64];
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error("ERROR: %s", strerror_r(h_errno, tmp, sizeof(tmp)));
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return false;
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}
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sockAddr.sin_addr.s_addr = inet_addr(*host->h_addr_list);
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}
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int err = connect(socketDesc, (struct sockaddr*)&sockAddr,
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sizeof(sockAddr));
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// Non-blocking sockets always report in-progress error when connected
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if (err < 0 && errno != EINPROGRESS) {
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char tmp[64];
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error("ERROR: Connect(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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return false;
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}
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// Select on the socket completion
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struct timeval tv;
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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// Use select to check socket writability
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fd_set wfds;
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FD_ZERO(&wfds);
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FD_SET(socketDesc, &wfds);
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int retval = select(socketDesc + 1, NULL, &wfds, NULL, &tv);
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// Check if error
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if (retval < 0) {
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char tmp[64];
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error("ERROR: select(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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return -1;
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}
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// Select has returned. Get socket errors if there are any
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int socketStatus = 0;
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socklen_t len = sizeof(socketStatus);
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getsockopt(socketDesc, SOL_SOCKET, SO_ERROR, &socketStatus, &len);
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// If not any errors, then socket must be ready and connected
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if (socketStatus != 0) {
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error("Cannot connect to %s\n", streamAddr);
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char tmp[64];
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error("ERROR: %s", strerror_r(socketStatus, tmp, sizeof(tmp)));
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return false;
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}
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// Formulate and send HTTP request
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char buffer[256];
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memset(buffer, '\0', sizeof(buffer));
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snprintf(buffer, sizeof(buffer),
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"GET %s HTTP/1.1\r\n"
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"Host: %s\r\n"
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"User-Agent: vdr-iptv\r\n"
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"Range: bytes=0-\r\n"
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"Connection: Close\r\n"
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"\r\n", streamPath, streamAddr);
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//debug("Sending http request: %s\n", buffer);
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err = send(socketDesc, buffer, strlen(buffer), 0);
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if (err < 0) {
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char tmp[64];
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error("ERROR: send(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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return false;
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}
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// It would be a good idea to wait here for the reception to begin instead
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// of blindly assuming that datastream is really active.
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// Also parsing the reply headers should happen here to see if the
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// connection should be re-located etc.
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// Update active flag
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unicastActive = true;
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}
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return true;
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}
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bool cIptvProtocolHttp::Disconnect(void)
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{
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debug("cIptvProtocolHttp::Disconnect()\n");
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// Check that stream address is valid
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if (unicastActive) {
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// Close the socket
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CloseSocket();
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// Update active flag
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unicastActive = false;
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}
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return true;
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}
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int cIptvProtocolHttp::Read(unsigned char* *BufferAddr)
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{
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//debug("cIptvProtocolHttp::Read()\n");
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socklen_t addrlen = sizeof(sockAddr);
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// Set argument point to read buffer
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*BufferAddr = readBuffer;
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// Wait for data
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = 500000;
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// Use select
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fd_set rfds;
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FD_ZERO(&rfds);
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FD_SET(socketDesc, &rfds);
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int retval = select(socketDesc + 1, &rfds, NULL, NULL, &tv);
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// Check if error
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if (retval < 0) {
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char tmp[64];
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error("ERROR: select(): %s", strerror_r(errno, tmp, sizeof(tmp)));
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return -1;
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}
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// Check if data available
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else if (retval) {
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// Read data from socket
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return recvfrom(socketDesc, readBuffer, (TS_SIZE * IptvConfig.GetHttpBufferSize()),
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MSG_DONTWAIT, (struct sockaddr *)&sockAddr, &addrlen);
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}
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return 0;
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}
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bool cIptvProtocolHttp::Open(void)
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{
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debug("cIptvProtocolHttp::Open(): streamAddr=%s\n", streamAddr);
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// Connect the socket
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return Connect();
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}
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bool cIptvProtocolHttp::Close(void)
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{
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debug("cIptvProtocolHttp::Close(): streamAddr=%s\n", streamAddr);
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// Disconnect the current stream
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Disconnect();
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return true;
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}
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bool cIptvProtocolHttp::Set(const char* Address, const int Port)
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{
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debug("cIptvProtocolHttp::Set(): %s:%d\n", Address, Port);
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if (!isempty(Address)) {
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// Disconnect the current socket
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Disconnect();
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// Update stream address, path and port
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streamAddr = strcpyrealloc(streamAddr, Address);
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char *path = strstr(streamAddr, "/");
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if (path) {
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streamPath = strcpyrealloc(streamPath, path);
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*path = 0;
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}
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else
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streamPath = strcpyrealloc(streamPath, "/");
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streamPort = Port;
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debug("iptv://%s:%d%s\n", streamAddr, streamPort, streamPath);
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// Re-connect the socket
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Connect();
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}
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return true;
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}
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