mirror of
https://projects.vdr-developer.org/git/vdr-plugin-streamdev.git
synced 2023-10-10 19:16:51 +02:00
368 lines
9.1 KiB
C
368 lines
9.1 KiB
C
/*
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* $Id: socket.c,v 1.15 2010/08/18 10:26:55 schmirl Exp $
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*/
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#include <tools/select.h>
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#include <string.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <time.h>
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#define MINLOGREPEAT 10 //don't log connect failures too often (seconds)
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// timeout for writing to command socket
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#define WRITE_TIMEOUT_MS 200
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#define QUIT_TIMEOUT_MS 500
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#include "client/socket.h"
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#include "common.h"
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cClientSocket ClientSocket;
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cClientSocket::cClientSocket(void)
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{
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memset(m_DataSockets, 0, sizeof(cTBSocket*) * si_Count);
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m_ServerVersion = 0;
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m_Prio = false;
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m_Abort = false;
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m_LastSignalUpdate = 0;
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m_LastSignalStrength = -1;
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m_LastSignalQuality = -1;
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Reset();
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}
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cClientSocket::~cClientSocket()
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{
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Reset();
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if (IsOpen()) Quit();
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}
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void cClientSocket::Reset(void)
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{
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for (int it = 0; it < si_Count; ++it) {
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if (m_DataSockets[it] != NULL)
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DELETENULL(m_DataSockets[it]);
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}
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}
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cTBSocket *cClientSocket::DataSocket(eSocketId Id) const {
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return m_DataSockets[Id];
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}
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bool cClientSocket::Command(const std::string &Command, uint Expected)
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{
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uint code = 0;
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std::string buffer;
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if (Send(Command) && Receive(Command, &code, &buffer)) {
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if (code == Expected)
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return true;
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dsyslog("streamdev-client: Command '%s' rejected by %s:%d: %s",
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Command.c_str(), RemoteIp().c_str(), RemotePort(), buffer.c_str());
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}
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return false;
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}
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bool cClientSocket::Send(const std::string &Command)
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{
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std::string pkt = Command + "\015\012";
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Dprintf("OUT: |%s|\n", Command.c_str());
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errno = 0;
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if (!TimedWrite(pkt.c_str(), pkt.size(), WRITE_TIMEOUT_MS)) {
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esyslog("ERROR: streamdev-client: Failed sending command '%s' to %s:%d: %s",
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Command.c_str(), RemoteIp().c_str(), RemotePort(), strerror(errno));
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Close();
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return false;
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}
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return true;
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}
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#define TIMEOUT_MS 1000
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bool cClientSocket::Receive(const std::string &Command, uint *Code, std::string *Result, uint TimeoutMs) {
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int bufcount;
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do
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{
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errno = 0;
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bufcount = ReadUntil(m_Buffer, sizeof(m_Buffer) - 1, "\012", TimeoutMs < TIMEOUT_MS ? TimeoutMs : TIMEOUT_MS);
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if (bufcount == -1) {
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if (m_Abort)
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return false;
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if (errno != ETIMEDOUT || TimeoutMs <= TIMEOUT_MS) {
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esyslog("ERROR: streamdev-client: Failed reading reply to '%s' from %s:%d: %s",
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Command.c_str(), RemoteIp().c_str(), RemotePort(), strerror(errno));
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Close();
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return false;
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}
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TimeoutMs -= TIMEOUT_MS;
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}
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} while (bufcount == -1);
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if (m_Buffer[bufcount - 1] == '\015')
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--bufcount;
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m_Buffer[bufcount] = '\0';
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Dprintf("IN: |%s|\n", m_Buffer);
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if (Result != NULL)
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*Result = m_Buffer;
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if (Code != NULL)
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*Code = strtoul(m_Buffer, NULL, 10);
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return true;
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}
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bool cClientSocket::CheckConnection(void) {
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CMD_LOCK;
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if (IsOpen()) {
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cTBSelect select;
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Dprintf("connection open\n");
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// XXX+ check if connection is still alive (is there a better way?)
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// There REALLY shouldn't be anything readable according to PROTOCOL here
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// If there is, assume it's an eof signal (subseq. read would return 0)
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select.Add(*this, false);
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int res;
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if ((res = select.Select(0)) == 0) {
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Dprintf("select said nothing happened\n");
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return true;
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}
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Dprintf("closing connection (res was %d)", res);
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Close();
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}
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if (!Connect(StreamdevClientSetup.RemoteIp, StreamdevClientSetup.RemotePort, StreamdevClientSetup.Timeout * 1000)){
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static time_t lastTime = 0;
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if (time(NULL) - lastTime > MINLOGREPEAT) {
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esyslog("ERROR: streamdev-client: Couldn't connect to %s:%d: %s",
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(const char*)StreamdevClientSetup.RemoteIp,
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StreamdevClientSetup.RemotePort, strerror(errno));
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lastTime = time(NULL);
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}
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return false;
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}
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uint code = 0;
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std::string buffer;
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if (!Receive("<connect>", &code, &buffer)) {
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Close();
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return false;
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}
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if (code != 220) {
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esyslog("ERROR: streamdev-client: Didn't receive greeting from %s:%d: %s",
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RemoteIp().c_str(), RemotePort(), buffer.c_str());
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Close();
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return false;
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}
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unsigned int major, minor;
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if (sscanf(buffer.c_str(), "%*u VTP/%u.%u", &major, &minor) == 2)
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m_ServerVersion = major * 100 + minor;
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if (m_ServerVersion == 0) {
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if (!Command("CAPS TSPIDS", 220)) {
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Close();
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return false;
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}
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const char *Filters = "";
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if(Command("CAPS FILTERS", 220))
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Filters = ",FILTERS";
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const char *Prio = "";
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if(Command("CAPS PRIO", 220)) {
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Prio = ",PRIO";
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m_Prio = true;
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}
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isyslog("streamdev-client: Connected to server %s:%d using capabilities TSPIDS%s%s",
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RemoteIp().c_str(), RemotePort(), Filters, Prio);
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}
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else {
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if(!Command("VERS 1.0", 220)) {
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Close();
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return false;
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}
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m_Prio = true;
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isyslog("streamdev-client: Connected to server %s:%d using protocol version %u.%u",
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RemoteIp().c_str(), RemotePort(), major, minor);
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}
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return true;
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}
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bool cClientSocket::ProvidesChannel(const cChannel *Channel, int Priority) {
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if (!CheckConnection()) return false;
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CMD_LOCK;
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std::string command = (std::string)"PROV " + (const char*)itoa(Priority) + " "
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+ (const char*)Channel->GetChannelID().ToString();
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if (!Send(command))
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return false;
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uint code;
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std::string buffer;
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if (!Receive(command, &code, &buffer))
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return false;
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if (code != 220 && code != 560) {
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esyslog("streamdev-client: Unexpected reply to '%s' from %s:%d: %s",
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command.c_str(), RemoteIp().c_str(), RemotePort(), buffer.c_str());
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return false;
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}
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return code == 220;
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}
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bool cClientSocket::CreateDataConnection(eSocketId Id) {
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cTBSocket listen(SOCK_STREAM);
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if (!CheckConnection()) return false;
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if (m_DataSockets[Id] != NULL)
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DELETENULL(m_DataSockets[Id]);
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if (!listen.Listen(LocalIp(), 0, 1)) {
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esyslog("ERROR: streamdev-client: Couldn't create data connection: %s",
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strerror(errno));
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return false;
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}
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std::string command = (std::string)"PORT " + (const char*)itoa(Id) + " "
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+ LocalIp().c_str() + ","
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+ (const char*)itoa((listen.LocalPort() >> 8) & 0xff) + ","
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+ (const char*)itoa(listen.LocalPort() & 0xff);
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size_t idx = 4;
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while ((idx = command.find('.', idx + 1)) != (size_t)-1)
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command[idx] = ',';
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CMD_LOCK;
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if (!Command(command, 220))
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return false;
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/* The server SHOULD do the following:
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* - get PORT command
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* - connect to socket
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* - return 220
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*/
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m_DataSockets[Id] = new cTBSocket;
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if (!m_DataSockets[Id]->Accept(listen)) {
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esyslog("ERROR: streamdev-client: Couldn't establish data connection to %s:%d%s%s",
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RemoteIp().c_str(), RemotePort(), errno == 0 ? "" : ": ",
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errno == 0 ? "" : strerror(errno));
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DELETENULL(m_DataSockets[Id]);
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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 cClientSocket::CloseDataConnection(eSocketId Id) {
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CMD_LOCK;
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if(Id == siLive || Id == siLiveFilter)
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if (m_DataSockets[Id] != NULL) {
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std::string command = (std::string)"ABRT " + (const char*)itoa(Id);
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Command(command, 220);
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DELETENULL(m_DataSockets[Id]);
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}
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return true;
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}
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bool cClientSocket::SetChannelDevice(const cChannel *Channel) {
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if (!CheckConnection()) return false;
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CMD_LOCK;
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std::string command = (std::string)"TUNE "
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+ (const char*)Channel->GetChannelID().ToString();
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if (!Command(command, 220))
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return false;
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m_LastSignalUpdate = 0;
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return true;
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}
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bool cClientSocket::SetPriority(int Priority) {
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if (!CheckConnection()) return false;
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CMD_LOCK;
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std::string command = (std::string)"PRIO " + (const char*)itoa(Priority);
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return Command(command, 220);
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}
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bool cClientSocket::GetSignal(int *SignalStrength, int *SignalQuality) {
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if (!CheckConnection()) return -1;
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CMD_LOCK;
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if (m_LastSignalUpdate != time(NULL)) {
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uint code = 0;
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std::string buffer;
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std::string command("SGNL");
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if (!Send(command) || !Receive(command, &code, &buffer) || code != 220
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|| sscanf(buffer.c_str(), "%*d %*d %d:%d", &m_LastSignalStrength, &m_LastSignalQuality) != 2) {
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m_LastSignalStrength = -1;
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m_LastSignalQuality = -1;
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}
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m_LastSignalUpdate = time(NULL);
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}
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if (SignalStrength)
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*SignalStrength = m_LastSignalStrength;
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if (SignalQuality)
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*SignalQuality = m_LastSignalQuality;
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return 0;
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}
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bool cClientSocket::SetPid(int Pid, bool On) {
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if (!CheckConnection()) return false;
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CMD_LOCK;
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std::string command = (std::string)(On ? "ADDP " : "DELP ") + (const char*)itoa(Pid);
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return Command(command, 220);
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}
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bool cClientSocket::SetFilter(ushort Pid, uchar Tid, uchar Mask, bool On) {
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if (!CheckConnection()) return false;
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CMD_LOCK;
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std::string command = (std::string)(On ? "ADDF " : "DELF ") + (const char*)itoa(Pid)
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+ " " + (const char*)itoa(Tid) + " " + (const char*)itoa(Mask);
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return Command(command, 220);
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}
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bool cClientSocket::CloseDvr(void) {
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if (!CheckConnection()) return false;
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CMD_LOCK;
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if (m_DataSockets[siLive] != NULL) {
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std::string command = (std::string)"ABRT " + (const char*)itoa(siLive);
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if (!Command(command, 220))
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return false;
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DELETENULL(m_DataSockets[siLive]);
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}
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return true;
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}
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bool cClientSocket::Quit(void) {
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m_Abort = true;
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if (!IsOpen()) return false;
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CMD_LOCK;
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std::string command("QUIT");
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bool res = Send(command) && Receive(command, NULL, NULL, QUIT_TIMEOUT_MS);
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Close();
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return res;
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}
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bool cClientSocket::SuspendServer(void) {
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if (!CheckConnection()) return false;
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CMD_LOCK;
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return Command("SUSP", 220);
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}
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