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#include <sys/msg.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <errno.h>
#include <signal.h>
#include <vdr/tools.h>
#include "def.h"
#include "talk.h"
//***************************************************************************
// Statics
//***************************************************************************
static int fTimeout = no;
//*************************************************************************
// Timeout-Handler
//*************************************************************************
void timeoutHandler(...)
{
fTimeout = true;
}
//***************************************************************************
// Object
//***************************************************************************
Talk::Talk()
{
struct msgbuf* theMsg = (struct msgbuf*)buffer;
header = (Header*)theMsg->mtext;
message = theMsg->mtext + sizeof(Header);
receiverID = na;
msgID = na;
timeout = 30;
opened = no;
}
Talk::~Talk()
{
if (opened)
{
if (msgctl(msgID, IPC_RMID, 0) < 0)
tell(eloAlways, "Error: Closing message queue failed, '%s'", strerror(errno));
}
}
//***************************************************************************
// Init
//***************************************************************************
int Talk::init()
{
return success;
}
//***************************************************************************
// Open
//***************************************************************************
int Talk::open(long port)
{
if ((msgID = msgget(0xd8000000 + port, IPC_CREAT|S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
{
tell(eloAlways, "Creating of message queue failed, error was '%s'", strerror(errno));
return fail;
}
opened = yes;
return success;
}
//***************************************************************************
// Wait
//***************************************************************************
int Talk::wait()
{
int result;
int status = success;
struct itimerval oldTimer, newTimer;
struct sigaction oldAction, newAction;
struct msgbuf* theMsg = (struct msgbuf*)buffer;
// clear message buffer
memset(buffer, 0, sizeBuffer);
// set timeout-handler
if (timeout)
{
// init register
memset(&newAction, 0, sizeof(newAction));
memset(&newTimer, 0, sizeof(newTimer));
// set timer
newTimer.it_value.tv_sec = timeout;
setitimer(ITIMER_REAL, &newTimer, &oldTimer);
// set handler
newAction.sa_handler = (void(*)(int))timeoutHandler;
sigaction(SIGALRM, &newAction, &oldAction);
// clear timeout-flag
fTimeout = no;
}
// receive auf
if ((result = msgrcv(msgID, theMsg, sizeBuffer, 0, 0)) < 0)
{
if (!fTimeout)
{
if (errno == EINTR)
return wrnSysInterrupt;
else if (errno == E2BIG)
return errMessageToBig;
else if (errno != ENOMSG)
tell(eloAlways, "Receiving message failed, errno (%d), '%s'",
errno, strerror(errno));
}
status = fail;
}
if (timeout)
{
sigaction(SIGALRM, &oldAction, 0);
setitimer(ITIMER_REAL, &oldTimer,0);
}
if (status == success)
{
event = header->event;
from = header->sender;
}
return status;
}
//***************************************************************************
// Send
//***************************************************************************
int Talk::send(long to, int event, const char* msg)
{
struct msgbuf* theMsg = (struct msgbuf*)buffer;
int sizeMsg = sizeof(Header);
int receiverID;
if (!msg) msg = "";
if (strlen(msg) > sizeBuffer - sizeof(Header) - sizeof(theMsg->mtype))
{
tell(eloAlways, "Message to big, aborting");
return fail;
}
// try to get the receiver ID
if ((receiverID = msgget(0xd8000000 + to, 0)) < 0)
{
tell(eloAlways, "Attach to message queue failed, '%s'", strerror(errno));
return fail;
}
strcpy(message, msg);
sizeMsg += strlen(message)+1;
theMsg->mtype = 1;
header->sender = msgID;
header->receiver = receiverID;
header->event = event;
header->type = 0;
if (msgsnd(header->receiver, theMsg, sizeMsg, 0) < 0)
{
tell(eloAlways, "send failed, '%s'", strerror(errno));
return fail;
}
tell(eloAlways, "send to (%ld) succeeded", header->receiver);
return success;
}
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