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vdr-plugin-satip/msearch.c

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/*
* msearch.c: SAT>IP plugin for the Video Disk Recorder
*
* See the README file for copyright information and how to reach the author.
*
*/
#include "config.h"
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#include "common.h"
#include "discover.h"
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#include "log.h"
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#include "poller.h"
#include "msearch.h"
const char *cSatipMsearch::bcastAddressS = "239.255.255.250";
const char *cSatipMsearch::bcastMessageS = "M-SEARCH * HTTP/1.1\r\n" \
"HOST: 239.255.255.250:1900\r\n" \
"MAN: \"ssdp:discover\"\r\n" \
"ST: urn:ses-com:device:SatIPServer:1\r\n" \
"MX: 2\r\n\r\n";
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cSatipMsearch::cSatipMsearch(cSatipDiscoverIf &discoverP)
: discoverM(discoverP),
bufferLenM(eProbeBufferSize),
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bufferM(MALLOC(unsigned char, bufferLenM)),
registeredM(false)
{
if (bufferM)
memset(bufferM, 0, bufferLenM);
else
error("Cannot create Msearch buffer!");
if (!Open(eDiscoveryPort))
error("Cannot open Msearch port!");
}
cSatipMsearch::~cSatipMsearch()
{
}
void cSatipMsearch::Probe(void)
{
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debug1("%s", __PRETTY_FUNCTION__);
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if (!registeredM) {
cSatipPoller::GetInstance()->Register(*this);
registeredM = true;
}
Write(bcastAddressS, reinterpret_cast<const unsigned char *>(bcastMessageS), strlen(bcastMessageS));
}
int cSatipMsearch::GetFd(void)
{
return Fd();
}
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void cSatipMsearch::Process(void)
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{
debug16("%s", __PRETTY_FUNCTION__);
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if (bufferM) {
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int length;
while ((length = Read(bufferM, bufferLenM)) > 0) {
bufferM[min(length, int(bufferLenM - 1))] = 0;
debug12("%s len=%d buf=%s", __PRETTY_FUNCTION__, length, bufferM);
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bool status = false, valid = false;
char *s, *p = reinterpret_cast<char *>(bufferM), *location = NULL;
char *r = strtok_r(p, "\r\n", &s);
while (r) {
debug12("%s r=%s", __PRETTY_FUNCTION__, r);
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// Check the status code
// HTTP/1.1 200 OK
if (!status && startswith(r, "HTTP/1.1 200 OK"))
status = true;
if (status) {
// Check the location data
// LOCATION: http://192.168.0.115:8888/octonet.xml
if (startswith(r, "LOCATION:")) {
location = compactspace(r + 9);
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debug1("%s location='%s'", __PRETTY_FUNCTION__, location);
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}
// Check the source type
// ST: urn:ses-com:device:SatIPServer:1
else if (startswith(r, "ST:")) {
char *st = compactspace(r + 3);
if (strstr(st, "urn:ses-com:device:SatIPServer:1"))
valid = true;
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debug1("%s st='%s'", __PRETTY_FUNCTION__, st);
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}
// Check whether all the required data is found
if (valid && !isempty(location)) {
discoverM.SetUrl(location);
break;
}
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}
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r = strtok_r(NULL, "\r\n", &s);
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}
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}
if (errno != EAGAIN && errno != EWOULDBLOCK)
error("Error %d reading in %s", errno, *ToString());
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}
}
cString cSatipMsearch::ToString(void) const
{
return "MSearch";
}