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Code Issues Releases Wiki Activity

Fixed detecting whether a CAM replies to queries

This commit is contained in:
Klaus Schmidinger 2017-06-19 12:16:40 +02:00
parent 70f48e6ca3
commit 95947a29d5
3 changed files with 25 additions and 13 deletions
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4
CONTRIBUTORS
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@ -3503,3 +3503,7 @@ Sergey Chernyavskiy <glenvt18@gmail.com>
Frank Richter <kulpstur@t-online.de>
for adding 'S3W ABS-3A' to sources.conf
Daniel Scheller <d.scheller@gmx.net>
for reporting a problem with detecting whether a CAM replies to queries, which didn't
work on some systems since the implementation of RI_HOST_CONTROL

4
HISTORY
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@ -9130,6 +9130,8 @@ Video Disk Recorder Revision History
before including tools.h in case some plugin needs to use the STL and gets error
messages regarding one of the template functions defined in tools.h.
2017-06-12: Version 2.3.8
2017-06-19: Version 2.3.8
- Updated links in the INSTALL file (thanks to Chris Mayo).
- Fixed detecting whether a CAM replies to queries, which didn't work on some systems
since the implementation of RI_HOST_CONTROL (reported by Daniel Scheller).

30
ci.c
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@ -4,7 +4,7 @@
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: ci.c 4.17 2017/06/10 11:53:39 kls Exp $
* $Id: ci.c 4.18 2017/06/19 12:13:38 kls Exp $
*/
#include "ci.h"
@ -1041,8 +1041,9 @@ void cCiCaPmt::MtdMapPids(cMtdMapper *MtdMapper)
#define CA_ENABLE(x) (((x) & CA_ENABLE_FLAG) ? (x) & ~CA_ENABLE_FLAG : 0)
#define QUERY_WAIT_TIME 1000 // ms to wait before sending a query
#define QUERY_WAIT_TIME 500 // ms to wait before sending a query
#define QUERY_REPLY_TIMEOUT 2000 // ms to wait for a reply to a query
#define QUERY_RETRIES 6 // max. number of retries to check if there is a reply to a query
class cCiConditionalAccessSupport : public cCiSession {
private:
@ -1051,6 +1052,7 @@ private:
int caSystemIds[MAXCASYSTEMIDS + 1]; // list is zero terminated!
bool repliesToQuery;
cTimeMs timer;
int numRetries;
public:
cCiConditionalAccessSupport(uint16_t SessionId, cCiTransportConnection *Tc);
virtual void Process(int Length = 0, const uint8_t *Data = NULL);
@ -1069,6 +1071,7 @@ cCiConditionalAccessSupport::cCiConditionalAccessSupport(uint16_t SessionId, cCi
state = 0; // inactive
caSystemIds[numCaSystemIds = 0] = 0;
repliesToQuery = false;
numRetries = 0;
}
void cCiConditionalAccessSupport::Process(int Length, const uint8_t *Data)
@ -1098,7 +1101,8 @@ void cCiConditionalAccessSupport::Process(int Length, const uint8_t *Data)
caSystemIds[numCaSystemIds] = 0;
dbgprotocol("\n");
if (state == 1) {
timer.Set(QUERY_WAIT_TIME); // WORKAROUND: Alphacrypt 3.09 doesn't reply to QUERY immediately after reset
timer.Set(0);
numRetries = QUERY_RETRIES;
state = 2; // got ca info
}
dsyslog("CAM %d: system ids:%s", CamSlot()->SlotNumber(), *Ids ? *Ids : " none");
@ -1171,15 +1175,17 @@ void cCiConditionalAccessSupport::Process(int Length, const uint8_t *Data)
SendData(AOT_CA_INFO_ENQ);
state = 1; // enquired ca info
}
else if (state == 2 && timer.TimedOut()) {
cCiCaPmt CaPmt(CPCI_QUERY, 0, 0, 0, NULL);
SendPMT(&CaPmt);
timer.Set(QUERY_REPLY_TIMEOUT);
state = 3; // waiting for reply
}
else if (state == 3 && timer.TimedOut()) {
dsyslog("CAM %d: doesn't reply to QUERY - only a single channel can be decrypted", CamSlot()->SlotNumber());
state = 4; // normal operation
else if ((state == 2 || state == 3) && timer.TimedOut()) {
if (numRetries-- > 0) {
cCiCaPmt CaPmt(CPCI_QUERY, 0, 0, 0, NULL);
SendPMT(&CaPmt);
timer.Set(QUERY_WAIT_TIME);
state = 3; // waiting for reply
}
else {
dsyslog("CAM %d: doesn't reply to QUERY - only a single channel can be decrypted", CamSlot()->SlotNumber());
state = 4; // normal operation
}
}
}