/*
* RSRV_ONLINE_NOTIFY_TASK
*/
void rsrv_online_notify_task(void *pParm)
{
unsigned priorityOfSelf = epicsThreadGetPrioritySelf ();
osiSockAddrNode *pNode;
double delay;
double maxdelay;
long longStatus;
double maxPeriod;
caHdr msg;
int status;
SOCKET sock;
int intTrue = TRUE;
unsigned short port;
ca_uint32_t beaconCounter = 0;
char * pStr;
int autoBeaconAddr;
ELLLIST autoAddrList;
char buf[16];
unsigned priorityOfUDP;
epicsThreadBooleanStatus tbs;
epicsThreadId tid;
taskwdInsert (epicsThreadGetIdSelf(),NULL,NULL);
if ( envGetConfigParamPtr ( & EPICS_CAS_BEACON_PERIOD ) ) {
longStatus = envGetDoubleConfigParam ( & EPICS_CAS_BEACON_PERIOD, & maxPeriod );
}
else {
longStatus = envGetDoubleConfigParam ( & EPICS_CA_BEACON_PERIOD, & maxPeriod );
}
if (longStatus || maxPeriod<=0.0) {
maxPeriod = 15.0;
epicsPrintf ("EPICS \"%s\" float fetch failed\n",
EPICS_CAS_BEACON_PERIOD.name);
epicsPrintf ("Setting \"%s\" = %f\n",
EPICS_CAS_BEACON_PERIOD.name, maxPeriod);
}
delay = 0.02; /* initial beacon period in sec */
maxdelay = maxPeriod;
/*
* Open the socket.
* Use ARPA Internet address format and datagram socket.
* Format described in <sys/socket.h>.
*/
if ( (sock = epicsSocketCreate (AF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET) {
errlogPrintf ("CAS: online socket creation error\n");
epicsThreadSuspendSelf ();
}
status = setsockopt (sock, SOL_SOCKET, SO_BROADCAST,
(char *)&intTrue, sizeof(intTrue));
if (status<0) {
errlogPrintf ("CAS: online socket set up error\n");
epicsThreadSuspendSelf ();
}
{
/*
* this connect is to supress a warning message on Linux
* when we shutdown the read side of the socket. If it
* fails (and it will on old ip kernels) we just ignore
* the failure.
*/
osiSockAddr sockAddr;
sockAddr.ia.sin_family = AF_UNSPEC;
sockAddr.ia.sin_port = htons ( 0 );
sockAddr.ia.sin_addr.s_addr = htonl (0);
connect ( sock, & sockAddr.sa, sizeof ( sockAddr.sa ) );
shutdown ( sock, SHUT_RD );
}
memset((char *)&msg, 0, sizeof msg);
msg.m_cmmd = htons (CA_PROTO_RSRV_IS_UP);
msg.m_count = htons (ca_server_port);
msg.m_dataType = htons (CA_MINOR_PROTOCOL_REVISION);
ellInit ( & beaconAddrList );
ellInit ( & autoAddrList );
pStr = envGetConfigParam(&EPICS_CAS_AUTO_BEACON_ADDR_LIST, sizeof(buf), buf);
if ( ! pStr ) {
pStr = envGetConfigParam(&EPICS_CA_AUTO_ADDR_LIST, sizeof(buf), buf);
}
if (pStr) {
if (strstr(pStr,"no")||strstr(pStr,"NO")) {
autoBeaconAddr = FALSE;
}
else if (strstr(pStr,"yes")||strstr(pStr,"YES")) {
autoBeaconAddr = TRUE;
}
else {
fprintf(stderr,
"CAS: EPICS_CA(S)_AUTO_ADDR_LIST = \"%s\"? Assuming \"YES\"\n", pStr);
autoBeaconAddr = TRUE;
}
}
else {
autoBeaconAddr = TRUE;
}
/*
* load user and auto configured
* broadcast address list
*/
if (envGetConfigParamPtr(&EPICS_CAS_BEACON_PORT)) {
port = envGetInetPortConfigParam (&EPICS_CAS_BEACON_PORT,
(unsigned short) CA_REPEATER_PORT );
}
else {
port = envGetInetPortConfigParam (&EPICS_CA_REPEATER_PORT,
(unsigned short) CA_REPEATER_PORT );
}
/*
* discover beacon addresses associated with this interface
*/
if ( autoBeaconAddr ) {
osiSockAddr addr;
ELLLIST tmpList;
ellInit ( &tmpList );
addr.ia.sin_family = AF_UNSPEC;
osiSockDiscoverBroadcastAddresses (&tmpList, sock, &addr);
forcePort ( &tmpList, port );
removeDuplicateAddresses ( &autoAddrList, &tmpList, 1 );
}
/*
* by default use EPICS_CA_ADDR_LIST for the
* beacon address list
*/
{
const ENV_PARAM *pParam;
if (envGetConfigParamPtr(&EPICS_CAS_INTF_ADDR_LIST) ||
envGetConfigParamPtr(&EPICS_CAS_BEACON_ADDR_LIST)) {
pParam = &EPICS_CAS_BEACON_ADDR_LIST;
}
else {
pParam = &EPICS_CA_ADDR_LIST;
}
/*
* add in the configured addresses
*/
addAddrToChannelAccessAddressList (
&autoAddrList, pParam, port, pParam == &EPICS_CA_ADDR_LIST );
}
removeDuplicateAddresses ( &beaconAddrList, &autoAddrList, 0 );
if ( ellCount ( &beaconAddrList ) == 0 ) {
errlogPrintf ("The CA server's beacon address list was empty after initialization?\n");
}
# ifdef DEBUG
printChannelAccessAddressList (&beaconAddrList);
# endif
tbs = epicsThreadHighestPriorityLevelBelow ( priorityOfSelf, &priorityOfUDP );
if ( tbs != epicsThreadBooleanStatusSuccess ) {
priorityOfUDP = priorityOfSelf;
}
casudp_startStopEvent = epicsEventMustCreate(epicsEventEmpty);
casudp_ctl = ctlPause;
tid = epicsThreadCreate ( "CAS-UDP", priorityOfUDP,
epicsThreadGetStackSize (epicsThreadStackMedium),
cast_server, 0 );
if ( tid == 0 ) {
epicsPrintf ( "CAS: unable to start UDP daemon thread\n" );
}
epicsEventMustWait(casudp_startStopEvent);
epicsEventSignal(beacon_startStopEvent);
while (TRUE) {
pNode = (osiSockAddrNode *) ellFirst (&beaconAddrList);
while (pNode) {
char buf[64];
status = connect (sock, &pNode->addr.sa,
sizeof(pNode->addr.sa));
if (status<0) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString (
sockErrBuf, sizeof ( sockErrBuf ) );
ipAddrToDottedIP (&pNode->addr.ia, buf, sizeof(buf));
errlogPrintf ( "%s: CA beacon routing (connect to \"%s\") error was \"%s\"\n",
__FILE__, buf, sockErrBuf);
}
else {
struct sockaddr_in if_addr;
osiSocklen_t size = sizeof (if_addr);
status = getsockname (sock, (struct sockaddr *) &if_addr, &size);
if (status<0) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString ( sockErrBuf, sizeof ( sockErrBuf ) );
errlogPrintf ( "%s: CA beacon routing (getsockname) error was \"%s\"\n",
__FILE__, sockErrBuf);
}
else if (if_addr.sin_family==AF_INET) {
msg.m_available = if_addr.sin_addr.s_addr;
msg.m_cid = htonl ( beaconCounter );
status = send (sock, (char *)&msg, sizeof(msg), 0);
if (status < 0) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString ( sockErrBuf, sizeof ( sockErrBuf ) );
ipAddrToDottedIP (&pNode->addr.ia, buf, sizeof(buf));
errlogPrintf ( "%s: CA beacon (send to \"%s\") error was \"%s\"\n",
__FILE__, buf, sockErrBuf);
}
else {
assert (status == sizeof(msg));
}
}
}
pNode = (osiSockAddrNode *) pNode->node.next;
}
epicsThreadSleep(delay);
if (delay<maxdelay) {
delay *= 2.0;
if (delay>maxdelay) {
delay = maxdelay;
}
}
beaconCounter++; /* expected to overflow */
while (beacon_ctl == ctlPause) {
epicsThreadSleep(0.1);
delay = 0.02; /* Restart beacon timing if paused */
}
}
}
/*
* configureChannelAccessAddressList ()
*/
extern "C" void epicsShareAPI configureChannelAccessAddressList
( ELLLIST *pList, SOCKET sock, unsigned short port )
{
ELLLIST tmpList;
char *pstr;
char yesno[32u];
int yes;
/*
* dont load the list twice
*/
assert ( ellCount (pList) == 0 ); // X aCC 392
ellInit ( &tmpList ); // X aCC 392
/*
* Check to see if the user has disabled
* initializing the search b-cast list
* from the interfaces found.
*/
yes = true;
pstr = envGetConfigParam ( &EPICS_CA_AUTO_ADDR_LIST,
sizeof (yesno), yesno );
if ( pstr ) {
if ( strstr ( pstr, "no" ) || strstr ( pstr, "NO" ) ) {
yes = false;
}
}
/*
* LOCK is for piiu->destAddr list
* (lock outside because this is used by the server also)
*/
if (yes) {
ELLLIST bcastList;
osiSockAddr addr;
ellInit ( &bcastList ); // X aCC 392
addr.ia.sin_family = AF_UNSPEC;
osiSockDiscoverBroadcastAddresses ( &bcastList, sock, &addr );
forcePort ( &bcastList, port );
removeDuplicateAddresses ( &tmpList, &bcastList, 1 );
if ( ellCount ( &tmpList ) == 0 ) { // X aCC 392
osiSockAddrNode *pNewNode;
pNewNode = (osiSockAddrNode *) calloc ( 1, sizeof (*pNewNode) );
if ( pNewNode ) {
/*
* if no interfaces found then look for local channels
* with the loop back interface
*/
pNewNode->addr.ia.sin_family = AF_INET;
pNewNode->addr.ia.sin_addr.s_addr = htonl ( INADDR_LOOPBACK );
pNewNode->addr.ia.sin_port = htons ( port );
ellAdd ( &tmpList, &pNewNode->node );
}
else {
errlogPrintf ( "configureChannelAccessAddressList(): no memory available for configuration\n" );
}
}
}
addAddrToChannelAccessAddressList ( &tmpList, &EPICS_CA_ADDR_LIST, port, false );
removeDuplicateAddresses ( pList, &tmpList, 0 );
}
