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/*
* $Id: connection.c,v 1.13 2009/09/18 10:43:26 schmirl Exp $
*/
#include "server/connection.h"
#include "server/setup.h"
#include "server/suspend.h"
#include "common.h"
#include <vdr/tools.h>
#include <string.h>
#include <stdarg.h>
#include <errno.h>
cServerConnection::cServerConnection(const char *Protocol, int Type):
cTBSocket(Type),
m_Protocol(Protocol),
m_DeferClose(false),
m_Pending(false),
m_ReadBytes(0),
m_WriteBytes(0),
m_WriteIndex(0)
{
}
cServerConnection::~cServerConnection()
{
}
const cChannel* cServerConnection::ChannelFromString(const char *String, int *Apid) {
const cChannel *channel = NULL;
char *string = strdup(String);
char *ptr, *end;
int apididx = 0;
if ((ptr = strrchr(string, '+')) != NULL) {
*(ptr++) = '\0';
apididx = strtoul(ptr, &end, 10);
Dprintf("found apididx: %d\n", apididx);
}
if (isnumber(string)) {
int temp = strtol(String, NULL, 10);
if (temp >= 1 && temp <= Channels.MaxNumber())
channel = Channels.GetByNumber(temp);
} else {
channel = Channels.GetByChannelID(tChannelID::FromString(string));
if (channel == NULL) {
int i = 1;
while ((channel = Channels.GetByNumber(i, 1)) != NULL) {
if (String == channel->Name())
break;
i = channel->Number() + 1;
}
}
}
if (channel != NULL && apididx > 0) {
int apid = 0, index = 1;
for (int i = 0; channel->Apid(i) != 0; ++i, ++index) {
if (index == apididx) {
apid = channel->Apid(i);
break;
}
}
if (apid == 0) {
for (int i = 0; channel->Dpid(i) != 0; ++i, ++index) {
if (index == apididx) {
apid = channel->Dpid(i);
break;
}
}
}
if (Apid != NULL)
*Apid = apid;
}
free(string);
return channel;
}
bool cServerConnection::Read(void)
{
int b;
if ((b = cTBSocket::Read(m_ReadBuffer + m_ReadBytes,
sizeof(m_ReadBuffer) - m_ReadBytes - 1)) < 0) {
esyslog("ERROR: read from client (%s) %s:%d failed: %m",
m_Protocol, RemoteIp().c_str(), RemotePort());
return false;
}
if (b == 0) {
isyslog("client (%s) %s:%d has closed connection",
m_Protocol, RemoteIp().c_str(), RemotePort());
return false;
}
m_ReadBytes += b;
m_ReadBuffer[m_ReadBytes] = '\0';
char *end;
bool result = true;
while ((end = strchr(m_ReadBuffer, '\012')) != NULL) {
*end = '\0';
if (end > m_ReadBuffer && *(end - 1) == '\015')
*(end - 1) = '\0';
if (!Command(m_ReadBuffer))
return false;
m_ReadBytes -= ++end - m_ReadBuffer;
if (m_ReadBytes > 0)
memmove(m_ReadBuffer, end, m_ReadBytes);
}
if (m_ReadBytes == sizeof(m_ReadBuffer) - 1) {
esyslog("ERROR: streamdev: input buffer overflow (%s) for %s:%d",
m_Protocol, RemoteIp().c_str(), RemotePort());
return false;
}
return result;
}
bool cServerConnection::Write(void)
{
int b;
if ((b = cTBSocket::Write(m_WriteBuffer + m_WriteIndex,
m_WriteBytes - m_WriteIndex)) < 0) {
esyslog("ERROR: streamdev: write to client (%s) %s:%d failed: %m",
m_Protocol, RemoteIp().c_str(), RemotePort());
return false;
}
m_WriteIndex += b;
if (m_WriteIndex == m_WriteBytes) {
m_WriteIndex = 0;
m_WriteBytes = 0;
if (m_Pending)
Command(NULL);
if (m_DeferClose)
return false;
Flushed();
}
return true;
}
bool cServerConnection::Respond(const char *Message, bool Last, ...)
{
char *buffer;
int length;
va_list ap;
va_start(ap, Last);
length = vasprintf(&buffer, Message, ap);
va_end(ap);
if (length < 0) {
esyslog("ERROR: streamdev: buffer allocation failed (%s) for %s:%d",
m_Protocol, RemoteIp().c_str(), RemotePort());
return false;
}
if (m_WriteBytes + length + 2 > sizeof(m_WriteBuffer)) {
esyslog("ERROR: streamdev: output buffer overflow (%s) for %s:%d",
m_Protocol, RemoteIp().c_str(), RemotePort());
free(buffer);
return false;
}
Dprintf("OUT: |%s|\n", buffer);
memcpy(m_WriteBuffer + m_WriteBytes, buffer, length);
free(buffer);
m_WriteBytes += length;
m_WriteBuffer[m_WriteBytes++] = '\015';
m_WriteBuffer[m_WriteBytes++] = '\012';
m_Pending = !Last;
return true;
}
cDevice *cServerConnection::GetDevice(const cChannel *Channel, int Priority)
{
cDevice *device = NULL;
/*Dprintf("+ Statistics:\n");
Dprintf("+ Current Channel: %d\n", cDevice::CurrentChannel());
Dprintf("+ Current Device: %d\n", cDevice::ActualDevice()->CardIndex());
Dprintf("+ Transfer Mode: %s\n", cDevice::ActualDevice()
== cDevice::PrimaryDevice() ? "false" : "true");
Dprintf("+ Replaying: %s\n", cDevice::PrimaryDevice()->Replaying() ? "true"
: "false");*/
Dprintf(" * GetDevice(const cChannel*, int)\n");
Dprintf(" * -------------------------------\n");
device = cDevice::GetDevice(Channel, Priority, false);
Dprintf(" * Found following device: %p (%d)\n", device,
device ? device->CardIndex() + 1 : 0);
if (device == cDevice::ActualDevice())
Dprintf(" * is actual device\n");
if (!cSuspendCtl::IsActive() && StreamdevServerSetup.SuspendMode != smAlways)
Dprintf(" * NOT suspended\n");
if (!device || (device == cDevice::ActualDevice()
&& !cSuspendCtl::IsActive()
&& StreamdevServerSetup.SuspendMode != smAlways)) {
// mustn't switch actual device
// maybe a device would be free if THIS connection did turn off its streams?
Dprintf(" * trying again...\n");
const cChannel *current = Channels.GetByNumber(cDevice::CurrentChannel());
isyslog("streamdev-server: Detaching current receiver");
Detach();
device = cDevice::GetDevice(Channel, Priority, false);
Attach();
Dprintf(" * Found following device: %p (%d)\n", device,
device ? device->CardIndex() + 1 : 0);
if (device == cDevice::ActualDevice())
Dprintf(" * is actual device\n");
if (!cSuspendCtl::IsActive()
&& StreamdevServerSetup.SuspendMode != smAlways)
Dprintf(" * NOT suspended\n");
if (current && !TRANSPONDER(Channel, current))
Dprintf(" * NOT same transponder\n");
if (device && (device == cDevice::ActualDevice()
&& !cSuspendCtl::IsActive()
&& StreamdevServerSetup.SuspendMode != smAlways
&& current != NULL
&& !TRANSPONDER(Channel, current))) {
// now we would have to switch away live tv...let's see if live tv
// can be handled by another device
cDevice *newdev = NULL;
for (int i = 0; i < cDevice::NumDevices(); ++i) {
cDevice *dev = cDevice::GetDevice(i);
if (dev->ProvidesChannel(current, 0) && dev != device) {
newdev = dev;
break;
}
}
Dprintf(" * Found device for live tv: %p (%d)\n", newdev,
newdev ? newdev->CardIndex() + 1 : 0);
if (newdev == NULL || newdev == device)
// no suitable device to continue live TV, giving up...
device = NULL;
else
newdev->SwitchChannel(current, true);
}
}
return device;
}
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