mirror of
https://github.com/rofafor/vdr-plugin-iptv.git
synced 2023-10-10 13:37:03 +02:00
445 lines
15 KiB
C
445 lines
15 KiB
C
/*
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* socket.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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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <net/if.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 <vdr/device.h>
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#include "common.h"
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#include "config.h"
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#include "log.h"
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#include "socket.h"
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cIptvSocket::cIptvSocket()
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: socketPortM(0),
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socketDescM(-1),
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lastErrorReportM(0),
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packetErrorsM(0),
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sequenceNumberM(-1),
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isActiveM(false)
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{
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debug1("%s", __PRETTY_FUNCTION__);
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memset(&sockAddrM, 0, sizeof(sockAddrM));
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}
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cIptvSocket::~cIptvSocket()
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{
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debug1("%s", __PRETTY_FUNCTION__);
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// Close the socket
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CloseSocket();
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}
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bool cIptvSocket::OpenSocket(const int portP, const bool isUdpP)
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{
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debug1("%s (%d, %d)", __PRETTY_FUNCTION__, portP, isUdpP);
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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 (portP != socketPortM) {
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debug1("%s (%d, %d) Socket tear-down", __PRETTY_FUNCTION__, portP, isUdpP);
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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 (socketDescM < 0) {
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int yes = 1;
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// Create socket
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if (isUdpP)
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socketDescM = socket(PF_INET, SOCK_DGRAM, 0);
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else
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socketDescM = socket(PF_INET, SOCK_STREAM, 0);
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ERROR_IF_RET(socketDescM < 0, "socket()", return false);
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// Make it use non-blocking I/O to avoid stuck read calls
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ERROR_IF_FUNC(fcntl(socketDescM, F_SETFL, O_NONBLOCK), "fcntl(O_NONBLOCK)",
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CloseSocket(), return false);
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// Allow multiple sockets to use the same PORT number
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ERROR_IF_FUNC(setsockopt(socketDescM, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0,
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"setsockopt(SO_REUSEADDR)", CloseSocket(), return false);
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#ifndef __FreeBSD__
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// Allow packet information to be fetched
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ERROR_IF_FUNC(setsockopt(socketDescM, SOL_IP, IP_PKTINFO, &yes, sizeof(yes)) < 0,
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"setsockopt(IP_PKTINFO)", CloseSocket(), return false);
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#endif // __FreeBSD__
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// Bind socket
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memset(&sockAddrM, 0, sizeof(sockAddrM));
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sockAddrM.sin_family = AF_INET;
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sockAddrM.sin_port = htons((uint16_t)(portP & 0xFFFF));
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sockAddrM.sin_addr.s_addr = htonl(INADDR_ANY);
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if (isUdpP)
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{
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int rcvbuf = 4 * 1024 * 1024;
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ERROR_IF_FUNC(bind(socketDescM, (struct sockaddr *)&sockAddrM, sizeof(sockAddrM)) < 0,
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"bind()", CloseSocket(), return false);
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ERROR_IF_RET(setsockopt(socketDescM, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(int)) < 0, "setsockopt(SO_RCVBUF)", return false);
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}
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// Update socket port
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socketPortM = portP;
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}
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return true;
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}
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void cIptvSocket::CloseSocket(void)
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{
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debug1("%s", __PRETTY_FUNCTION__);
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// Check if socket exists
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if (socketDescM >= 0) {
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close(socketDescM);
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socketDescM = -1;
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socketPortM = 0;
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memset(&sockAddrM, 0, sizeof(sockAddrM));
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}
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if (packetErrorsM) {
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info("Detected %d RTP packet errors", packetErrorsM);
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packetErrorsM = 0;
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lastErrorReportM = time(NULL);
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}
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}
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bool cIptvSocket::CheckAddress(const char *addrP, in_addr_t *inAddrP)
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{
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if (inAddrP) {
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// First try only the IP address
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*inAddrP = inet_addr(addrP);
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if (*inAddrP == htonl(INADDR_NONE)) {
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debug1("%s (%s, ) Cannot convert to address", __PRETTY_FUNCTION__, addrP);
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// It may be a host name, get the name
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struct hostent *host = gethostbyname(addrP);
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if (!host) {
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char tmp[64];
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error("gethostbyname() failed: %s is not valid address: %s", addrP,
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strerror_r(h_errno, tmp, sizeof(tmp)));
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return false;
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}
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*inAddrP = inet_addr(*host->h_addr_list);
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}
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return true;
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}
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return false;
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}
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// UDP socket class
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cIptvUdpSocket::cIptvUdpSocket()
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: streamAddrM(htonl(INADDR_ANY)),
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sourceAddrM(htonl(INADDR_ANY)),
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useIGMPv3M(false)
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{
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debug1("%s", __PRETTY_FUNCTION__);
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}
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cIptvUdpSocket::~cIptvUdpSocket()
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{
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debug1("%s", __PRETTY_FUNCTION__);
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}
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bool cIptvUdpSocket::OpenSocket(const int portP)
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{
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debug1("%s (%d)", __PRETTY_FUNCTION__, portP);
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streamAddrM = htonl(INADDR_ANY);
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sourceAddrM = htonl(INADDR_ANY);
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useIGMPv3M = false;
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return cIptvSocket::OpenSocket(portP, true);
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}
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bool cIptvUdpSocket::OpenSocket(const int portP, const char *streamAddrP, const char *sourceAddrP, bool useIGMPv3P)
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{
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debug1("%s (%d, %s, %s, %d)", __PRETTY_FUNCTION__, portP, streamAddrP, sourceAddrP, useIGMPv3P);
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CheckAddress(streamAddrP, &streamAddrM);
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CheckAddress(sourceAddrP, &sourceAddrM);
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useIGMPv3M = useIGMPv3P;
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return cIptvSocket::OpenSocket(portP, true);
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}
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void cIptvUdpSocket::CloseSocket(void)
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{
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debug1("%s", __PRETTY_FUNCTION__);
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streamAddrM = htonl(INADDR_ANY);
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sourceAddrM = htonl(INADDR_ANY);
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useIGMPv3M = false;
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cIptvSocket::CloseSocket();
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}
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bool cIptvUdpSocket::JoinMulticast(void)
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{
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debug1("%s", __PRETTY_FUNCTION__);
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// Check if socket exists
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if (!isActiveM && (socketDescM >= 0)) {
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// Join a new multicast group
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if (useIGMPv3M) {
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// Source-specific multicast (SSM) is used
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struct group_source_req gsr;
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struct sockaddr_in *grp;
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struct sockaddr_in *src;
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gsr.gsr_interface = 0; // if_nametoindex("any") ?
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grp = (struct sockaddr_in*)&gsr.gsr_group;
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grp->sin_family = AF_INET;
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grp->sin_addr.s_addr = streamAddrM;
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grp->sin_port = 0;
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src = (struct sockaddr_in*)&gsr.gsr_source;
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src->sin_family = AF_INET;
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src->sin_addr.s_addr = sourceAddrM;
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src->sin_port = 0;
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ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, MCAST_JOIN_SOURCE_GROUP, &gsr, sizeof(gsr)) < 0, "setsockopt(MCAST_JOIN_SOURCE_GROUP)", return false);
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}
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else {
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if (IN_MULTICAST(ntohl(streamAddrM))) {
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struct ip_mreq mreq;
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mreq.imr_multiaddr.s_addr = streamAddrM;
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mreq.imr_interface.s_addr = htonl(INADDR_ANY);
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ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) < 0, "setsockopt(IP_ADD_MEMBERSHIP)", return false);
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}
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}
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// Update multicasting flag
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isActiveM = true;
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}
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return true;
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}
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bool cIptvUdpSocket::DropMulticast(void)
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{
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debug1("%s", __PRETTY_FUNCTION__);
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// Check if socket exists
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if (isActiveM && (socketDescM >= 0)) {
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// Drop the existing multicast group
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if (useIGMPv3M) {
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// Source-specific multicast (SSM) is used
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struct group_source_req gsr;
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struct sockaddr_in *grp;
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struct sockaddr_in *src;
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gsr.gsr_interface = 0; // if_nametoindex("any") ?
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grp = (struct sockaddr_in*)&gsr.gsr_group;
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grp->sin_family = AF_INET;
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grp->sin_addr.s_addr = streamAddrM;
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grp->sin_port = 0;
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src = (struct sockaddr_in*)&gsr.gsr_source;
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src->sin_family = AF_INET;
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src->sin_addr.s_addr = sourceAddrM;
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src->sin_port = 0;
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ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, MCAST_LEAVE_SOURCE_GROUP, &gsr, sizeof(gsr)) < 0, "setsockopt(MCAST_LEAVE_SOURCE_GROUP)", return false);
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}
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else {
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if (IN_MULTICAST(ntohl(streamAddrM))) {
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struct ip_mreq mreq;
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mreq.imr_multiaddr.s_addr = streamAddrM;
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mreq.imr_interface.s_addr = htonl(INADDR_ANY);
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ERROR_IF_RET(setsockopt(socketDescM, SOL_IP, IP_DROP_MEMBERSHIP, &mreq, sizeof(mreq)) < 0, "setsockopt(IP_DROP_MEMBERSHIP)", return false);
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}
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}
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// Update multicasting flag
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isActiveM = false;
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}
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return true;
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}
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int cIptvUdpSocket::Read(unsigned char *bufferAddrP, unsigned int bufferLenP)
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{
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debug16("%s", __PRETTY_FUNCTION__);
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// Error out if socket not initialized
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if (socketDescM <= 0) {
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error("%s Invalid socket", __PRETTY_FUNCTION__);
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return -1;
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}
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int len = 0;
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// Read data from socket in a loop
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do {
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socklen_t addrlen = sizeof(sockAddrM);
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struct msghdr msgh;
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struct iovec iov;
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char cbuf[256];
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len = 0;
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// Initialize iov and msgh structures
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memset(&msgh, 0, sizeof(struct msghdr));
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iov.iov_base = bufferAddrP;
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iov.iov_len = bufferLenP;
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msgh.msg_control = cbuf;
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msgh.msg_controllen = sizeof(cbuf);
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msgh.msg_name = &sockAddrM;
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msgh.msg_namelen = addrlen;
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msgh.msg_iov = &iov;
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msgh.msg_iovlen = 1;
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msgh.msg_flags = 0;
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if (isActiveM && socketDescM && bufferAddrP && (bufferLenP > 0))
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len = (int)recvmsg(socketDescM, &msgh, MSG_DONTWAIT);
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else
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break;
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if (len > 0) {
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#ifndef __FreeBSD__
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// Process auxiliary received data and validate source address
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for (struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msgh); cmsg != NULL; cmsg = CMSG_NXTHDR(&msgh, cmsg)) {
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if ((cmsg->cmsg_level == SOL_IP) && (cmsg->cmsg_type == IP_PKTINFO)) {
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struct in_pktinfo *i = (struct in_pktinfo *)CMSG_DATA(cmsg);
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if ((i->ipi_addr.s_addr == streamAddrM) || (htonl(INADDR_ANY) == streamAddrM)) {
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#endif // __FreeBSD__
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if (bufferAddrP[0] == TS_SYNC_BYTE)
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return len;
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else if (len > 3) {
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// http://tools.ietf.org/html/rfc3550
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// http://tools.ietf.org/html/rfc2250
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// Version
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unsigned int v = (bufferAddrP[0] >> 6) & 0x03;
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// Extension bit
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unsigned int x = (bufferAddrP[0] >> 4) & 0x01;
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// CSCR count
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unsigned int cc = bufferAddrP[0] & 0x0F;
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// Payload type: MPEG2 TS = 33
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//unsigned int pt = bufferAddrP[1] & 0x7F;
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// Sequence number
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int seq = ((bufferAddrP[2] & 0xFF) << 8) | (bufferAddrP[3] & 0xFF);
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if ((((sequenceNumberM + 1) % 0xFFFF) == 0) && (seq == 0xFFFF))
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sequenceNumberM = -1;
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else if ((sequenceNumberM >= 0) && (((sequenceNumberM + 1) % 0xFFFF) != seq)) {
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packetErrorsM++;
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if (time(NULL) - lastErrorReportM > eReportIntervalS) {
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info("Detected %d RTP packet errors", packetErrorsM);
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packetErrorsM = 0;
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lastErrorReportM = time(NULL);
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}
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sequenceNumberM = seq;
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}
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else
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sequenceNumberM = seq;
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// Header lenght
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unsigned int headerlen = (3 + cc) * (unsigned int)sizeof(uint32_t);
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// Check if extension
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if (x) {
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// Extension header length
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unsigned int ehl = (((bufferAddrP[headerlen + 2] & 0xFF) << 8) |
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(bufferAddrP[headerlen + 3] & 0xFF));
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// Update header length
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headerlen += (ehl + 1) * (unsigned int)sizeof(uint32_t);
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}
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// Check that rtp is version 2 and payload contains multiple of TS packet data
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if ((v == 2) && (((len - headerlen) % TS_SIZE) == 0) &&
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(bufferAddrP[headerlen] == TS_SYNC_BYTE)) {
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// Set argument point to payload in read buffer
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memmove(bufferAddrP, &bufferAddrP[headerlen], (len - headerlen));
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return (len - headerlen);
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}
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}
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#ifndef __FreeBSD__
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}
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}
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}
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#endif // __FreeBSD__
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}
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} while (len > 0);
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ERROR_IF_RET(len < 0 && errno != EAGAIN, "recvmsg()", return -1);
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return 0;
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}
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// TCP socket class
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cIptvTcpSocket::cIptvTcpSocket()
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{
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debug1("%s", __PRETTY_FUNCTION__);
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}
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cIptvTcpSocket::~cIptvTcpSocket()
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{
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debug1("%s", __PRETTY_FUNCTION__);
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}
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bool cIptvTcpSocket::OpenSocket(const int portP, const char *streamAddrP)
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{
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debug1("%s (%d, %s)", __PRETTY_FUNCTION__, portP, streamAddrP);
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// Socket must be opened before setting the host address
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return (cIptvSocket::OpenSocket(portP, false) && CheckAddress(streamAddrP, &sockAddrM.sin_addr.s_addr));
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}
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void cIptvTcpSocket::CloseSocket(void)
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{
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debug1("%s()", __PRETTY_FUNCTION__);
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cIptvSocket::CloseSocket();
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}
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bool cIptvTcpSocket::ConnectSocket(void)
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{
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debug1("%s", __PRETTY_FUNCTION__);
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if (!isActiveM && (socketDescM >= 0)) {
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int retval = connect(socketDescM, (struct sockaddr *)&sockAddrM, sizeof(sockAddrM));
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// Non-blocking sockets always report in-progress error when connected
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ERROR_IF_RET(retval < 0 && errno != EINPROGRESS, "connect()", return false);
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// Select with 800ms timeout on the socket completion, check if it is writable
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retval = select_single_desc(socketDescM, 800000, true);
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if (retval < 0)
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return retval;
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// Select has returned. Get socket errors if there are any
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retval = 0;
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socklen_t len = sizeof(retval);
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getsockopt(socketDescM, SOL_SOCKET, SO_ERROR, &retval, &len);
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// If not any errors, then socket must be ready and connected
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if (retval != 0) {
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char tmp[64];
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error("Connect() failed: %s", strerror_r(retval, tmp, sizeof(tmp)));
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return false;
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}
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}
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return true;
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}
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int cIptvTcpSocket::Read(unsigned char *bufferAddrP, unsigned int bufferLenP)
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{
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debug16("%s", __PRETTY_FUNCTION__);
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// Error out if socket not initialized
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if (socketDescM <= 0) {
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error("%s Invalid socket", __PRETTY_FUNCTION__);
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return -1;
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}
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int len = 0;
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socklen_t addrlen = sizeof(sockAddrM);
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// Read data from socket
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if (isActiveM && socketDescM && bufferAddrP && (bufferLenP > 0))
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len = (int)recvfrom(socketDescM, bufferAddrP, bufferLenP, MSG_DONTWAIT,
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(struct sockaddr *)&sockAddrM, &addrlen);
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return len;
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}
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bool cIptvTcpSocket::ReadChar(char *bufferAddrP, unsigned int timeoutMsP)
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{
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debug16("%s", __PRETTY_FUNCTION__);
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// Error out if socket not initialized
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if (socketDescM <= 0) {
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error("%s Invalid socket", __PRETTY_FUNCTION__);
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return false;
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}
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socklen_t addrlen = sizeof(sockAddrM);
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// Wait 500ms for data
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int retval = select_single_desc(socketDescM, 1000 * timeoutMsP, false);
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// Check if error
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if (retval < 0)
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return false;
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// Check if data available
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else if (retval) {
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retval = (int)recvfrom(socketDescM, bufferAddrP, 1, MSG_DONTWAIT,
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(struct sockaddr *)&sockAddrM, &addrlen);
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if (retval <= 0)
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return false;
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}
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return true;
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}
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bool cIptvTcpSocket::Write(const char *bufferAddrP, unsigned int bufferLenP)
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{
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debug16("%s", __PRETTY_FUNCTION__);
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// Error out if socket not initialized
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if (socketDescM <= 0) {
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error("%s Invalid socket", __PRETTY_FUNCTION__);
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return false;
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}
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ERROR_IF_RET(send(socketDescM, bufferAddrP, bufferLenP, 0) < 0, "send()", return false);
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return true;
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}
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