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configure that WINSOCK is very different about SO_REUSEADDR

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and print warning message when TCP port is dynamically assigned
This commit is contained in:
Jeff Hill
2000-10-11 22:22:19 +00:00
parent 6bf3771462
commit aeec89103c
1 changed files with 34 additions and 13 deletions
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47
src/cas/io/bsdSocket/casIntfIO.cc
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@@ -25,6 +25,7 @@ casIntfIO::casIntfIO (const caNetAddr &addrIn) :
int yes = TRUE;
int status;
int addrSize;
bool portChange;
if ( ! osiSockAttach () ) {
throw S_cas_internal;
@@ -40,20 +41,28 @@ casIntfIO::casIntfIO (const caNetAddr &addrIn) :
}
/*
* release the port in case we exit early
* Allows immediate reuse of the port in case we exit early
*
* Note: WINSOCK appears to assign a different functionality for
* SO_REUSEADDR compared to other OS. With WINSOCK SO_REUSEADDR indicates
* that other servers can bind to the same TCP port on the same host!
* Also, servers are always enabled to reuse a port immediately after
* they exit.
*/
status = setsockopt (
this->sock,
SOL_SOCKET,
SO_REUSEADDR,
(char *) &yes,
sizeof (yes));
if (status<0) {
errlogPrintf("CAS: server set SO_REUSEADDR failed? %s\n",
SOCKERRSTR(SOCKERRNO));
socket_close (this->sock);
throw S_cas_internal;
}
# ifndef SO_REUSEADDR_DOES_NOT_RELEASE_TCP_PORT
status = setsockopt (
this->sock,
SOL_SOCKET,
SO_REUSEADDR,
(char *) &yes,
sizeof (yes));
if (status<0) {
errlogPrintf("CAS: server set SO_REUSEADDR failed? %s\n",
SOCKERRSTR(SOCKERRNO));
socket_close (this->sock);
throw S_cas_internal;
}
# endif
status = bind(this->sock,(sockaddr *) &this->addr,
sizeof(this->addr));
@@ -82,7 +91,11 @@ casIntfIO::casIntfIO (const caNetAddr &addrIn) :
socket_close (this->sock);
throw S_cas_bindFail;
}
portChange = true;
}
else {
portChange = false;
}
addrSize = sizeof (this->addr);
status = getsockname (this->sock,
@@ -100,6 +113,14 @@ casIntfIO::casIntfIO (const caNetAddr &addrIn) :
//
assert (this->addr.sin_family == AF_INET);
if ( portChange ) {
errlogPrintf ( "cas warning: Configured TCP port was unavailable.\n");
errlogPrintf ( "cas warning: Using dynamically assigned port %hu\n",
ntohs (this->addr.sin_port) );
errlogPrintf ( "cas warning: Depending on your IP kernel\n" );
errlogPrintf ( "cas warning: this server may not be reachable with unicast\n" );
}
status = listen(this->sock, caServerConnectPendQueueSize);
if(status < 0) {
errlogPrintf("CAS: listen() error %s\n", SOCKERRSTR(SOCKERRNO));