mDNSlocal void WaitForAnswer(mDNS *const m, int seconds)
{
struct timeval end;
gettimeofday(&end, NULL);
end.tv_sec += seconds;
StopNow = 0;
NumAnswers = 0;
while (!StopNow)
{
int nfds = 0;
fd_set readfds;
struct timeval now, remain = end;
int result;
FD_ZERO(&readfds);
gettimeofday(&now, NULL);
if (remain.tv_usec < now.tv_usec) { remain.tv_usec += 1000000; remain.tv_sec--; }
if (remain.tv_sec < now.tv_sec)
{
if (!NumAnswers) printf("No response after %d seconds\n", seconds);
return;
}
remain.tv_usec -= now.tv_usec;
remain.tv_sec -= now.tv_sec;
mDNSPosixGetFDSet(m, &nfds, &readfds, &remain);
result = select(nfds, &readfds, NULL, NULL, &remain);
if (result >= 0) mDNSPosixProcessFDSet(m, &readfds);
else if (errno != EINTR) StopNow = 2;
}
}
// From <mDNSDir>/ExampleClientApp.c
mDNSexport int embedded_mDNSmainLoop(struct timeval timeout) {
int nfds = 0;
fd_set readfds;
int result;
// 1. Set up the fd_set as usual here.
// This example client has no file descriptors of its own,
// but a real application would call FD_SET to add them to the set here
FD_ZERO(&readfds);
// 2. Set up the timeout.
// This example client has no other work it needs to be doing,
// so we set an effectively infinite timeout
// timeout.tv_sec = 0x3FFFFFFF;
// timeout.tv_usec = 0;
assert(timeout.tv_sec < 10);
// 3. Give the mDNSPosix layer a chance to add its information to the fd_set and timeout
mDNSPosixGetFDSet(&mDNSStorage, &nfds, &readfds, &timeout);
// 4. Call select as normal
result = select(nfds, &readfds, NULL, NULL, &timeout);
if (result > 0) {
// 5. Call mDNSPosixProcessFDSet to let the mDNSPosix layer do its work
mDNSPosixProcessFDSet(&mDNSStorage, &readfds);
// 6. This example client has no other work it needs to be doing,
// but a real client would do its work here
// ... (do work) ...
}
return result;
}
mDNSexport void ExampleClientEventLoop(mDNS *const m)
{
signal(SIGINT, HandleSIG); // SIGINT is what you get for a Ctrl-C
signal(SIGTERM, HandleSIG);
while (!StopNow)
{
int nfds = 0;
fd_set readfds;
struct timeval timeout;
int result;
// 1. Set up the fd_set as usual here.
// This example client has no file descriptors of its own,
// but a real application would call FD_SET to add them to the set here
FD_ZERO(&readfds);
// 2. Set up the timeout.
// This example client has no other work it needs to be doing,
// so we set an effectively infinite timeout
timeout.tv_sec = 0x3FFFFFFF;
timeout.tv_usec = 0;
// 3. Give the mDNSPosix layer a chance to add its information to the fd_set and timeout
mDNSPosixGetFDSet(m, &nfds, &readfds, &timeout);
// 4. Call select as normal
verbosedebugf("select(%d, %d.%06d)", nfds, timeout.tv_sec, timeout.tv_usec);
result = select(nfds, &readfds, NULL, NULL, &timeout);
if (result < 0)
{
verbosedebugf("select() returned %d errno %d", result, errno);
if (errno != EINTR) StopNow = mDNStrue;
}
else
{
// 5. Call mDNSPosixProcessFDSet to let the mDNSPosix layer do its work
mDNSPosixProcessFDSet(m, &readfds);
// 6. This example client has no other work it needs to be doing,
// but a real client would do its work here
// ... (do work) ...
}
}
debugf("Exiting");
}
mDNSexport void EventLoop(mDNS *const m)
{
//printf("*** Call EventLoop ***\n");
while (!StopNow)
{
int nfds = 0;
fd_set readfds;
struct timeval timeout;
int result;
// 1. Set up the fd_set as usual here.
FD_ZERO(&readfds);
// 2. Set up the timeout.
timeout.tv_sec = 0x3FFFFFFF;
timeout.tv_usec = 0;
// 3. Give the mDNSPosix layer a chance to add its information to the fd_set and timeout
mDNSPosixGetFDSet(m, &nfds, &readfds, &timeout);
// 4. Call select as normal
if(StopNow) {
//printf("BREAK!!!\n");
break;
}
//printf("select(%d, %d.%06d)\n", nfds, timeout.tv_sec, timeout.tv_usec);
result = select(nfds, &readfds, NULL, NULL, &timeout);
if (result < 0)
{
printf("select() returned %d errno %d", result, errno);
if (errno != EINTR) StopNow = mDNStrue;
}
else
{
// 5. Call mDNSPosixProcessFDSet to let the mDNSPosix layer do its work
mDNSPosixProcessFDSet(m, &readfds);
event++;
//fprintf(stderr, "=== Event count: %d ===\n", event);
if( (event - callback) > 5 )
StopNow = 1;
}
}
}
int rend_private_init(char *user) {
mStatus status;
mDNSBool result;
status = mDNS_Init(&mDNSStorage, &PlatformStorage,
mDNS_Init_NoCache, mDNS_Init_ZeroCacheSize,
mDNS_Init_AdvertiseLocalAddresses,
mDNS_Init_NoInitCallback, mDNS_Init_NoInitCallbackContext);
if (status != mStatus_NoError) {
DPRINTF(E_FATAL,L_REND,"mDNS Error %d\n",status);
return(-1);
}
if(os_drop_privs(user))
return -1;
signal(SIGINT, HandleSigInt); // SIGINT is what you get for a Ctrl-C
signal(SIGQUIT, HandleSigQuit); // SIGQUIT is what you get for a Ctrl-\ (indeed)
signal(SIGHUP, SIG_IGN); // SIGHUP might happen from a request to reload the daap server
while (!gStopNow) {
int nfds = 1;
fd_set readfds;
struct timeval timeout;
int result;
// 1. Set up the fd_set as usual here.
// This example client has no file descriptors of its own,
// but a real application would call FD_SET to add them to the set here
FD_ZERO(&readfds);
FD_SET(rend_pipe_to[RD_SIDE],&readfds);
// 2. Set up the timeout.
// This example client has no other work it needs to be doing,
// so we set an effectively infinite timeout
timeout.tv_sec = 0x3FFFFFFF;
timeout.tv_usec = 0;
// 3. Give the mDNSPosix layer a chance to add its information to the fd_set and timeout
mDNSPosixGetFDSet(&mDNSStorage, &nfds, &readfds, &timeout);
// 4. Call select as normal
DPRINTF(E_SPAM,L_REND,"select(%d, %d.%06d)\n", nfds,
timeout.tv_sec, timeout.tv_usec);
result = select(nfds, &readfds, NULL, NULL, &timeout);
if (result < 0) {
if (errno != EINTR) gStopNow = mDNStrue;
DPRINTF(E_WARN,L_REND,"select() returned %d errno %d\n", result, errno);
} else {
// 5. Call mDNSPosixProcessFDSet to let the mDNSPosix layer do its work
mDNSPosixProcessFDSet(&mDNSStorage, &readfds);
// 6. This example client has no other work it needs to be doing,
// but a real client would do its work here
// ... (do work) ...
if(FD_ISSET(rend_pipe_to[RD_SIDE],&readfds)) {
rend_callback();
}
}
}
DPRINTF(E_DBG,L_REND,"Exiting\n");
DeregisterOurServices();
mDNS_Close(&mDNSStorage);
if (status == mStatus_NoError) {
result = 0;
} else {
result = 2;
}
DPRINTF(E_DBG,L_REND, "Finished with status %ld, result %d\n",
status, result);
exit(result);
}
int main(int argc, char **argv)
{
mStatus status;
int result;
// Parse our command line arguments. This won't come back if there's an error.
ParseArguments(argc, argv);
// If we're told to run as a daemon, then do that straight away.
// Note that we don't treat the inability to create our PID
// file as an error. Also note that we assign getpid to a long
// because printf has no format specified for pid_t.
if (gDaemon) {
if (gMDNSPlatformPosixVerboseLevel > 0) {
fprintf(stderr, "%s: Starting in daemon mode\n", gProgramName);
}
daemon(0,0);
{
FILE *fp;
int junk;
fp = fopen(gPIDFile, "w");
if (fp != NULL) {
fprintf(fp, "%ld\n", (long) getpid());
junk = fclose(fp);
assert(junk == 0);
}
}
} else {
if (gMDNSPlatformPosixVerboseLevel > 0) {
fprintf(stderr, "%s: Starting in foreground mode, PID %ld\n", gProgramName, (long) getpid());
}
}
status = mDNS_Init(&mDNSStorage, &PlatformStorage,
mDNS_Init_NoCache, mDNS_Init_ZeroCacheSize,
mDNS_Init_AdvertiseLocalAddresses,
mDNS_Init_NoInitCallback, mDNS_Init_NoInitCallbackContext);
if (status != mStatus_NoError) return(2);
status = RegisterOurServices();
if (status != mStatus_NoError) return(2);
signal(SIGHUP, HandleSigHup); // SIGHUP has to be sent by kill -HUP <pid>
signal(SIGINT, HandleSigInt); // SIGINT is what you get for a Ctrl-C
signal(SIGQUIT, HandleSigQuit); // SIGQUIT is what you get for a Ctrl-\ (indeed)
signal(SIGUSR1, HandleSigUsr1); // SIGUSR1 has to be sent by kill -USR1 <pid>
while (!gStopNow)
{
int nfds = 0;
fd_set readfds;
struct timeval timeout;
int result;
// 1. Set up the fd_set as usual here.
// This example client has no file descriptors of its own,
// but a real application would call FD_SET to add them to the set here
FD_ZERO(&readfds);
// 2. Set up the timeout.
// This example client has no other work it needs to be doing,
// so we set an effectively infinite timeout
timeout.tv_sec = 0x3FFFFFFF;
timeout.tv_usec = 0;
// 3. Give the mDNSPosix layer a chance to add its information to the fd_set and timeout
mDNSPosixGetFDSet(&mDNSStorage, &nfds, &readfds, &timeout);
// 4. Call select as normal
verbosedebugf("select(%d, %d.%06d)", nfds, timeout.tv_sec, timeout.tv_usec);
result = select(nfds, &readfds, NULL, NULL, &timeout);
if (result < 0)
{
verbosedebugf("select() returned %d errno %d", result, errno);
if (errno != EINTR) gStopNow = mDNStrue;
else
{
if (gReceivedSigUsr1)
{
gReceivedSigUsr1 = mDNSfalse;
gMDNSPlatformPosixVerboseLevel += 1;
if (gMDNSPlatformPosixVerboseLevel > 2)
gMDNSPlatformPosixVerboseLevel = 0;
if ( gMDNSPlatformPosixVerboseLevel > 0 )
fprintf(stderr, "\nVerbose level %d\n", gMDNSPlatformPosixVerboseLevel);
}
if (gReceivedSigHup)
{
if (gMDNSPlatformPosixVerboseLevel > 0)
fprintf(stderr, "\nSIGHUP\n");
gReceivedSigHup = mDNSfalse;
DeregisterOurServices();
status = mDNSPlatformPosixRefreshInterfaceList(&mDNSStorage);
if (status != mStatus_NoError) break;
status = RegisterOurServices();
if (status != mStatus_NoError) break;
}
}
}
else
{
// 5. Call mDNSPosixProcessFDSet to let the mDNSPosix layer do its work
mDNSPosixProcessFDSet(&mDNSStorage, &readfds);
// 6. This example client has no other work it needs to be doing,
// but a real client would do its work here
// ... (do work) ...
}
}
debugf("Exiting");
DeregisterOurServices();
mDNS_Close(&mDNSStorage);
if (status == mStatus_NoError) {
result = 0;
} else {
result = 2;
}
if ( (result != 0) || (gMDNSPlatformPosixVerboseLevel > 0) ) {
fprintf(stderr, "%s: Finished with status %ld, result %d\n", gProgramName, status, result);
}
return result;
}
