Files
pcas/src/ca/casw.cpp
2006-11-18 00:42:32 +00:00

307 lines
10 KiB
C++

/*************************************************************************\
* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
* National Laboratory.
* Copyright (c) 2002 The Regents of the University of California, as
* Operator of Los Alamos National Laboratory.
* EPICS BASE Versions 3.13.7
* and higher are distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
\*************************************************************************/
/*
*
* L O S A L A M O S
* Los Alamos National Laboratory
* Los Alamos, New Mexico 87545
*
* Copyright, 1986, The Regents of the University of California.
*
* Author: Jeff Hill
*/
#include <stdio.h>
#define epicsAssertAuthor "Jeff Hill johill@lanl.gov"
#include "envDefs.h"
#include "errlog.h"
#include "osiWireFormat.h"
#include "bhe.h"
#include "udpiiu.h"
#include "inetAddrID.h"
// using a wrapper class around the free list avoids
// Tornado 2.0.1 GNU compiler bugs
class bheFreeStoreMgr : public bheMemoryManager {
public:
bheFreeStoreMgr () {}
void * allocate ( size_t );
void release ( void * );
private:
tsFreeList < class bhe, 0x100 > freeList;
bheFreeStoreMgr ( const bheFreeStoreMgr & );
bheFreeStoreMgr & operator = ( const bheFreeStoreMgr & );
};
void * bheFreeStoreMgr::allocate ( size_t size )
{
return freeList.allocate ( size );
}
void bheFreeStoreMgr::release ( void * pCadaver )
{
freeList.release ( pCadaver );
}
int main ( int argc, char ** argv )
{
epicsMutex mutex;
epicsGuard < epicsMutex > guard ( mutex );
bheFreeStoreMgr bheFreeList;
epicsTime programBeginTime = epicsTime::getCurrent ();
bool validCommandLine = false;
unsigned interest = 0u;
SOCKET sock;
osiSockAddr addr;
osiSocklen_t addrSize;
char buf [0x4000];
const char *pCurBuf;
const caHdr *pCurMsg;
ca_uint16_t serverPort;
ca_uint16_t repeaterPort;
int status;
if ( argc == 1 ) {
validCommandLine = true;
}
else if ( argc == 2 ) {
status = sscanf ( argv[1], " -i%u ", & interest );
if ( status == 1 ) {
validCommandLine = true;
}
}
else if ( argc == 3 ) {
if ( strcmp ( argv[1], "-i" ) == 0 ) {
status = sscanf ( argv[2], " %u ", & interest );
if ( status == 1 ) {
validCommandLine = true;
}
}
}
if ( ! validCommandLine ) {
printf ( "usage: casw <-i interestLevel>\n" );
return 0;
}
serverPort =
envGetInetPortConfigParam ( &EPICS_CA_SERVER_PORT,
static_cast <unsigned short> (CA_SERVER_PORT) );
repeaterPort =
envGetInetPortConfigParam ( &EPICS_CA_REPEATER_PORT,
static_cast <unsigned short> (CA_REPEATER_PORT) );
caStartRepeaterIfNotInstalled ( repeaterPort );
sock = epicsSocketCreate ( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
if ( sock == INVALID_SOCKET ) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString (
sockErrBuf, sizeof ( sockErrBuf ) );
errlogPrintf ("casw: unable to create datagram socket because = \"%s\"\n",
sockErrBuf );
return -1;
}
memset ( (char *) &addr, 0 , sizeof (addr) );
addr.ia.sin_family = AF_INET;
addr.ia.sin_addr.s_addr = htonl ( INADDR_ANY );
addr.ia.sin_port = htons ( 0 ); // any port
status = bind ( sock, &addr.sa, sizeof (addr) );
if ( status < 0 ) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString (
sockErrBuf, sizeof ( sockErrBuf ) );
epicsSocketDestroy ( sock );
errlogPrintf ( "casw: unable to bind to an unconstrained address because = \"%s\"\n",
sockErrBuf );
return -1;
}
osiSockIoctl_t yes = true;
status = socket_ioctl ( sock, FIONBIO, &yes ); // X aCC 392
if ( status < 0 ) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString (
sockErrBuf, sizeof ( sockErrBuf ) );
epicsSocketDestroy ( sock );
errlogPrintf ( "casw: unable to set socket to nonblocking state because \"%s\"\n",
sockErrBuf );
return -1;
}
unsigned attemptNumber = 0u;
while ( true ) {
caRepeaterRegistrationMessage ( sock, repeaterPort, attemptNumber );
epicsThreadSleep ( 0.1 );
addrSize = ( osiSocklen_t ) sizeof ( addr );
status = recvfrom ( sock, buf, sizeof ( buf ), 0,
&addr.sa, &addrSize );
if ( status >= static_cast <int> ( sizeof ( *pCurMsg ) ) ) {
pCurMsg = reinterpret_cast < caHdr * > ( buf );
epicsUInt16 cmmd = AlignedWireRef < const epicsUInt16 > ( pCurMsg->m_cmmd );
if ( cmmd == REPEATER_CONFIRM ) {
break;
}
}
attemptNumber++;
if ( attemptNumber > 100 ) {
epicsSocketDestroy ( sock );
errlogPrintf ( "casw: unable to register with the CA repeater\n" );
return -1;
}
}
osiSockIoctl_t no = false;
status = socket_ioctl ( sock, FIONBIO, &no ); // X aCC 392
if ( status < 0 ) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString (
sockErrBuf, sizeof ( sockErrBuf ) );
epicsSocketDestroy ( sock );
errlogPrintf ( "casw: unable to set socket to blocking state because \"%s\"\n",
sockErrBuf );
return -1;
}
resTable < bhe, inetAddrID > beaconTable;
while ( true ) {
addrSize = ( osiSocklen_t ) sizeof ( addr );
status = recvfrom ( sock, buf, sizeof ( buf ), 0,
&addr.sa, &addrSize );
if ( status <= 0 ) {
char sockErrBuf[64];
epicsSocketConvertErrnoToString (
sockErrBuf, sizeof ( sockErrBuf ) );
epicsSocketDestroy ( sock );
errlogPrintf ("casw: error from recv was = \"%s\"\n",
sockErrBuf );
return -1;
}
if ( addr.sa.sa_family != AF_INET ) {
continue;
}
unsigned byteCount = static_cast <unsigned> ( status );
pCurMsg = reinterpret_cast < const caHdr * > ( ( pCurBuf = buf ) );
while ( byteCount ) {
AlignedWireRef < const epicsUInt16 > pstSize ( pCurMsg->m_postsize );
size_t msgSize = pstSize + sizeof ( *pCurMsg ) ;
if ( msgSize > byteCount ) {
errlogPrintf ( "CASW: udp input protocol violation\n" );
break;
}
epicsUInt16 cmmd = AlignedWireRef < const epicsUInt16 > ( pCurMsg->m_cmmd );
if ( cmmd == CA_PROTO_RSRV_IS_UP ) {
bool anomaly = false;
epicsTime previousTime;
struct sockaddr_in ina;
/*
* this allows a fan-out server to potentially
* insert the true address of the CA server
*
* old servers:
* 1) set this field to one of the ip addresses of the host _or_
* 2) set this field to INADDR_ANY
* new servers:
* always set this field to INADDR_ANY
*
* clients always assume that if this
* field is set to something that isnt INADDR_ANY
* then it is the overriding IP address of the server.
*/
ina.sin_family = AF_INET;
ina.sin_addr.s_addr = pCurMsg->m_available;
if ( pCurMsg->m_count != 0 ) {
ina.sin_port = pCurMsg->m_count;
}
else {
/*
* old servers dont supply this and the
* default port must be assumed
*/
ina.sin_port = htons ( serverPort );
}
ca_uint32_t beaconNumber = ntohl ( pCurMsg->m_cid );
unsigned protocolRevision = ntohs ( pCurMsg->m_dataType );
epicsTime currentTime = epicsTime::getCurrent();
/*
* look for it in the hash table
*/
bhe *pBHE = beaconTable.lookup ( ina );
if ( pBHE ) {
previousTime = pBHE->updateTime ( guard );
anomaly = pBHE->updatePeriod (
guard, programBeginTime,
currentTime, beaconNumber, protocolRevision );
}
else {
/*
* This is the first beacon seen from this server.
* Wait until 2nd beacon is seen before deciding
* if it is a new server (or just the first
* time that we have seen a server's beacon
* shortly after the program started up)
*/
pBHE = new ( bheFreeList )
bhe ( mutex, currentTime, beaconNumber, ina );
if ( pBHE ) {
if ( beaconTable.add ( *pBHE ) < 0 ) {
pBHE->~bhe ();
bheFreeList.release ( pBHE );
}
}
}
if ( anomaly || interest > 1 ) {
char date[64];
currentTime.strftime ( date, sizeof ( date ),
"%Y-%m-%d %H:%M:%S.%09f");
char host[64];
ipAddrToA ( &ina, host, sizeof ( host ) );
const char * pPrefix = "";
if ( interest > 1 ) {
if ( anomaly ) {
pPrefix = "* ";
}
else {
pPrefix = " ";
}
}
printf ( "%s%-40s %s\n",
pPrefix, host, date );
if ( anomaly && interest > 0 ) {
printf ( "\testimate=%f current=%f\n",
pBHE->period ( guard ),
currentTime - previousTime );
}
fflush(stdout);
}
}
pCurBuf += msgSize;
pCurMsg = reinterpret_cast < const caHdr * > ( pCurBuf );
byteCount -= msgSize;
}
}
}