982 lines
26 KiB
C++
982 lines
26 KiB
C++
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/* $Id$
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*
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* L O S A L A M O S
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* Los Alamos National Laboratory
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* Los Alamos, New Mexico 87545
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*
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* Copyright, 1986, The Regents of the University of California.
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*
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* Author: Jeff Hill
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*/
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#include "osiProcess.h"
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#include "iocinf.h"
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#include "addrList.h"
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#include "inetAddrID_IL.h"
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typedef void (*pProtoStubUDP) (udpiiu *piiu, caHdr *pMsg, const struct sockaddr_in *pnet_addr);
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//
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// udpiiu::recvMsg ()
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//
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int udpiiu::recvMsg ()
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{
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osiSockAddr src;
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int src_size = sizeof (src);
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int status;
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status = recvfrom ( this->sock, this->recvBuf, sizeof ( this->recvBuf ), 0,
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&src.sa, &src_size );
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if (status < 0) {
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int errnoCpy = SOCKERRNO;
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if ( errnoCpy == SOCK_SHUTDOWN ) {
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return -1;
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}
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if ( errnoCpy == SOCK_ENOTSOCK ) {
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return -1;
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}
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if ( errnoCpy == SOCK_EBADF ) {
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return -1;
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}
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if ( errnoCpy == SOCK_EINTR ) {
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if ( this->shutdownCmd ) {
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return -1;
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}
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else {
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return 0;
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}
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}
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# ifdef linux
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/*
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* Avoid spurious ECONNREFUSED bug
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* in linux
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*/
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if ( errnoCpy == SOCK_ECONNREFUSED ) {
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return 0;
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}
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# endif
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ca_printf (
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"Unexpected UDP recv error %s\n", SOCKERRSTR(errnoCpy));
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}
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else if (status > 0) {
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status = this->post_msg ( &src.ia,
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this->recvBuf, (unsigned long) status );
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if ( status != ECA_NORMAL ) {
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char buf[64];
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ipAddrToA (&src.ia, buf, sizeof(buf));
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ca_printf (
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"%s: bad UDP msg from %s because \"%s\"\n", __FILE__,
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buf, ca_message (status) );
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return 0;
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}
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}
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return 0;
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}
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/*
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* cacRecvThreadUDP ()
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*/
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extern "C" void cacRecvThreadUDP (void *pParam)
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{
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udpiiu *piiu = (udpiiu *) pParam;
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int status;
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do {
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status = piiu->recvMsg ();
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} while ( status == 0 );
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semBinaryGive (piiu->recvThreadExitSignal);
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}
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/*
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* udpiiu::repeaterRegistrationMessage ()
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*
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* register with the repeater
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*/
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void udpiiu::repeaterRegistrationMessage ( unsigned attemptNumber )
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{
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caHdr msg;
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osiSockAddr saddr;
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int status;
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int len;
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/*
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* In 3.13 beta 11 and before the CA repeater calls local_addr()
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* to determine a local address and does not allow registration
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* messages originating from other addresses. In these
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* releases local_addr() returned the address of the first enabled
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* interface found, and this address may or may not have been the loop
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* back address. Starting with 3.13 beta 12 local_addr() was
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* changed to always return the address of the first enabled
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* non-loopback interface because a valid non-loopback local
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* address is required in the beacon messages. Therefore, to
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* guarantee compatibility with past versions of the repeater
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* we alternate between the address returned by local_addr()
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* and the loopback address here.
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*
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* CA repeaters in R3.13 beta 12 and higher allow
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* either the loopback address or the address returned
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* by local address (the first non-loopback address found)
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*/
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if ( attemptNumber & 1 ) {
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saddr = osiLocalAddr ( this->sock );
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if ( saddr.sa.sa_family != AF_INET ) {
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/*
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* use the loop back address to communicate with the CA repeater
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* if this os does not have interface query capabilities
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*
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* this will only work with 3.13 beta 12 CA repeaters or later
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*/
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saddr.ia.sin_family = AF_INET;
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saddr.ia.sin_addr.s_addr = htonl ( INADDR_LOOPBACK );
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saddr.ia.sin_port = htons ( this->repeaterPort );
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}
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}
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else {
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saddr.ia.sin_family = AF_INET;
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saddr.ia.sin_addr.s_addr = htonl ( INADDR_LOOPBACK );
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saddr.ia.sin_port = htons ( this->repeaterPort );
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}
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memset ( (char *) &msg, 0, sizeof (msg) );
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msg.m_cmmd = htons ( REPEATER_REGISTER );
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msg.m_available = saddr.ia.sin_addr.s_addr;
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/*
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* Intentionally sending a zero length message here
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* until most CA repeater daemons have been restarted
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* (and only then will accept the above protocol)
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* (repeaters began accepting this protocol
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* starting with EPICS 3.12)
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*
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* SOLARIS will not accept a zero length message
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* and we are just porting there for 3.12 so
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* we will use the new protocol for 3.12
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*
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* recent versions of UCX will not accept a zero
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* length message and we will assume that folks
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* using newer versions of UCX have rebooted (and
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* therefore restarted the CA repeater - and therefore
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* moved it to an EPICS release that accepts this protocol)
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*/
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# if defined ( DOES_NOT_ACCEPT_ZERO_LENGTH_UDP )
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len = sizeof (msg);
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# else
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len = 0;
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# endif
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status = sendto ( this->sock, (char *) &msg, len,
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0, (struct sockaddr *) &saddr, sizeof ( saddr ) );
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if ( status < 0 ) {
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int errnoCpy = SOCKERRNO;
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if ( errnoCpy != SOCK_EINTR &&
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/*
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* This is returned from Linux when
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* the repeater isnt running
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*/
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errnoCpy != SOCK_ECONNREFUSED ) {
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ca_printf ( "CAC: error sending to repeater was \"%s\"\n",
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SOCKERRSTR (errnoCpy) );
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}
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}
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}
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/*
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* repeater_installed ()
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*
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* Test for the repeater already installed
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*
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* NOTE: potential race condition here can result
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* in two copies of the repeater being spawned
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* however the repeater detects this, prints a message,
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* and lets the other task start the repeater.
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*
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* QUESTION: is there a better way to test for a port in use?
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* ANSWER: none that I can find.
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*
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* Problems with checking for the repeater installed
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* by attempting to bind a socket to its address
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* and port.
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*
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* 1) Closed socket may not release the bound port
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* before the repeater wakes up and tries to grab it.
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* Attempting to bind the open socket to another port
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* also does not work.
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*
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* 072392 - problem solved by using SO_REUSEADDR
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*/
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int repeater_installed (udpiiu *piiu)
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{
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int installed = FALSE;
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int status;
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SOCKET sock;
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struct sockaddr_in bd;
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int flag;
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sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (sock == INVALID_SOCKET) {
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return installed;
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}
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memset ( (char *) &bd, 0, sizeof (bd) );
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bd.sin_family = AF_INET;
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bd.sin_addr.s_addr = htonl (INADDR_ANY);
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bd.sin_port = htons (piiu->repeaterPort);
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status = bind (sock, (struct sockaddr *) &bd, sizeof(bd) );
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if (status<0) {
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if (SOCKERRNO == SOCK_EADDRINUSE) {
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installed = TRUE;
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}
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}
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/*
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* turn on reuse only after the test so that
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* this works on kernels that support multicast
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*/
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flag = TRUE;
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status = setsockopt ( sock, SOL_SOCKET, SO_REUSEADDR,
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(char *)&flag, sizeof (flag) );
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if (status<0) {
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ca_printf ( "CAC: set socket option reuseaddr set failed\n");
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}
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socket_close (sock);
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return installed;
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}
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//
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// udpiiu::udpiiu ()
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//
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udpiiu::udpiiu ( cac *pcac ) :
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netiiu ( pcac ),
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shutdownCmd ( false )
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{
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static const unsigned short PORT_ANY = 0u;
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osiSockAddr addr;
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int boolValue = TRUE;
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int status;
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this->repeaterPort =
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envGetInetPortConfigParam (&EPICS_CA_REPEATER_PORT, CA_REPEATER_PORT);
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this->sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (this->sock == INVALID_SOCKET) {
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ca_printf ("CAC: unable to create datagram socket because = \"%s\"\n",
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SOCKERRSTR (SOCKERRNO));
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throwWithLocation ( noSocket () );
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}
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status = setsockopt ( this->sock, SOL_SOCKET, SO_BROADCAST,
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(char *) &boolValue, sizeof (boolValue) );
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if (status<0) {
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ca_printf ("CAC: unable to enable IP broadcasting because = \"%s\"\n",
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SOCKERRSTR (SOCKERRNO));
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}
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#if 0
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{
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/*
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* some concern that vxWorks will run out of mBuf's
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* if this change is made joh 11-10-98
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*
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* bump up the UDP recv buffer
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*/
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int size = 1u<<15u;
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status = setsockopt ( this->sock, SOL_SOCKET, SO_RCVBUF,
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(char *)&size, sizeof (size) );
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if (status<0) {
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ca_printf ("CAC: unable to set socket option SO_RCVBUF because \"%s\"\n",
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SOCKERRSTR (SOCKERRNO));
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}
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}
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#endif
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/*
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* force a bind to an unconstrained address because we may end
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* up receiving first
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*/
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memset ( (char *)&addr, 0 , sizeof (addr) );
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addr.ia.sin_family = AF_INET;
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addr.ia.sin_addr.s_addr = htonl (INADDR_ANY);
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addr.ia.sin_port = htons (PORT_ANY);
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status = bind (this->sock, &addr.sa, sizeof (addr) );
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if (status<0) {
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socket_close (this->sock);
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ca_printf ("CAC: unable to bind to an unconstrained address because = \"%s\"\n",
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SOCKERRSTR (SOCKERRNO));
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throwWithLocation ( noSocket () );
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}
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this->nBytesInXmitBuf = 0u;
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this->xmitBufLock = semMutexCreate ();
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if (!this->xmitBufLock) {
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socket_close (this->sock);
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throwWithLocation ( noMemory () );
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}
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this->recvThreadExitSignal = semBinaryCreate (semEmpty);
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if ( ! this->recvThreadExitSignal ) {
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semMutexDestroy (this->xmitBufLock);
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socket_close (this->sock);
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throwWithLocation ( noMemory () );
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}
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/*
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* load user and auto configured
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* broadcast address list
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*/
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ellInit ( &this->dest );
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configureChannelAccessAddressList (&this->dest, this->sock, pcac->ca_server_port);
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if ( ellCount ( &this->dest ) == 0 ) {
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genLocalExcep ( this->pcas, ECA_NOSEARCHADDR, NULL );
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}
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{
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unsigned priorityOfSelf = threadGetPrioritySelf ();
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unsigned priorityOfRecv;
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threadId tid;
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threadBoolStatus tbs;
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tbs = threadLowestPriorityLevelAbove ( priorityOfSelf, &priorityOfRecv );
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if ( tbs != tbsSuccess ) {
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priorityOfRecv = priorityOfSelf;
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}
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tid = threadCreate ("CAC-UDP", priorityOfRecv,
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threadGetStackSize (threadStackMedium), cacRecvThreadUDP, this);
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if (tid==0) {
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ca_printf ("CA: unable to create UDP receive thread\n");
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semBinaryDestroy (this->recvThreadExitSignal);
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semMutexDestroy (this->xmitBufLock);
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socket_close (this->sock);
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throwWithLocation ( noMemory () );
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}
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}
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if ( ! repeater_installed (this) ) {
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osiSpawnDetachedProcessReturn osptr;
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/*
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* This is not called if the repeater is known to be
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* already running. (in the event of a race condition
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* the 2nd repeater exits when unable to attach to the
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* repeater's port)
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*/
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osptr = osiSpawnDetachedProcess ("CA Repeater", "caRepeater");
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if ( osptr == osiSpawnDetachedProcessNoSupport ) {
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threadId tid;
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tid = threadCreate ( "CAC-repeater", threadPriorityLow,
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threadGetStackSize (threadStackMedium), caRepeaterThread, 0);
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if ( tid == 0 ) {
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ca_printf ("CA: unable to create CA repeater daemon thread\n");
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}
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}
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else if ( osptr == osiSpawnDetachedProcessFail ) {
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ca_printf ( "CA: unable to start CA repeater daemon detached process\n" );
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}
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}
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}
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/*
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* udpiiu::~udpiiu ()
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*/
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udpiiu::~udpiiu ()
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{
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nciu *pChan, *pNext;
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// closes the udp socket
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this->shutdown ();
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this->pcas->lock ();
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tsDLIter <nciu> iter (this->chidList);
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pChan = iter ();
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while (pChan) {
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pNext = iter ();
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pChan->destroy ();
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pChan = pNext;
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}
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this->pcas->unlock ();
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// wait for recv threads to exit
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semBinaryMustTake (this->recvThreadExitSignal);
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semMutexDestroy (this->xmitBufLock);
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semBinaryDestroy (this->recvThreadExitSignal);
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ellFree (&this->dest);
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}
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/*
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* udpiiu::shutdown ()
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*/
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void udpiiu::shutdown ()
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{
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this->pcas->lock ();
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if ( ! this->shutdownCmd ) {
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int status;
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this->shutdownCmd = true;
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//
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// use of shutdown () for this purpose on UDP
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// sockets does not work on certain OS (i.e. solaris)
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// because the thread in recv() does not drop out of recv().
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// On other OS (i.e. linux) shutdown() is required?
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//
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status = ::shutdown ( this->sock, SD_BOTH );
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if ( status ) {
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errlogPrintf ( "CAC UDP socket shutdown error was %s\n",
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SOCKERRSTR (SOCKERRNO) );
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}
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status = socket_close ( this->sock );
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if ( status ) {
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errlogPrintf ( "CAC UDP socket close error was %s\n",
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SOCKERRSTR (SOCKERRNO) );
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}
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}
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this->pcas->unlock ();
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}
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/*
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* bad_udp_resp_action ()
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*/
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LOCAL void bad_udp_resp_action (udpiiu * /* piiu */,
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caHdr *pMsg, const struct sockaddr_in *pnet_addr)
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{
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char buf[256];
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ipAddrToA ( pnet_addr, buf, sizeof (buf) );
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ca_printf ( "CAC: Bad response code in UDP message from %s was %u\n",
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buf, pMsg->m_cmmd);
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}
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/*
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* udp_noop_action ()
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*/
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LOCAL void udp_noop_action (udpiiu * /* piiu */, caHdr * /* pMsg */,
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const struct sockaddr_in * /* pnet_addr */)
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{
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return;
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}
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/*
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* search_resp_action ()
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*/
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LOCAL void search_resp_action (udpiiu *piiu, caHdr *pMsg, const struct sockaddr_in *pnet_addr)
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{
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struct sockaddr_in ina;
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nciu *chan;
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tcpiiu *allocpiiu;
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unsigned short *pMinorVersion;
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unsigned minorVersion;
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/*
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* ignore broadcast replies for deleted channels
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*
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* lock required around use of the sprintf buffer
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*/
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piiu->pcas->lock ();
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chan = piiu->pcas->lookupChan (pMsg->m_available);
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if ( ! chan ) {
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piiu->pcas->unlock ();
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return;
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}
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/*
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* Starting with CA V4.1 the minor version number
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* is appended to the end of each search reply.
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* This value is ignored by earlier clients.
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*/
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if ( pMsg->m_postsize >= sizeof (*pMinorVersion) ){
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pMinorVersion = (unsigned short *) (pMsg+1);
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minorVersion = ntohs (*pMinorVersion);
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}
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else {
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minorVersion = CA_UKN_MINOR_VERSION;
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}
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/*
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* the type field is abused to carry the port number
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* so that we can have multiple servers on one host
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*/
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ina.sin_family = AF_INET;
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if ( CA_V48 (CA_PROTOCOL_VERSION,minorVersion) ) {
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if ( pMsg->m_cid != INADDR_BROADCAST ) {
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/*
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* Leave address in network byte order (m_cid has not been
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* converted to the local byte order)
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*/
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ina.sin_addr.s_addr = pMsg->m_cid;
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}
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else {
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ina.sin_addr = pnet_addr->sin_addr;
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}
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ina.sin_port = htons (pMsg->m_dataType);
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}
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else if ( CA_V45 (CA_PROTOCOL_VERSION,minorVersion) ) {
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ina.sin_port = htons (pMsg->m_dataType);
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ina.sin_addr = pnet_addr->sin_addr;
|
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}
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else {
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ina.sin_port = htons (piiu->pcas->ca_server_port);
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ina.sin_addr = pnet_addr->sin_addr;
|
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}
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/*
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* Ignore duplicate search replies
|
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*/
|
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if ( chan->piiu->compareIfTCP (*chan, *pnet_addr) ) {
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piiu->pcas->unlock ();
|
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return;
|
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}
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|
|
allocpiiu = constructTCPIIU (piiu->pcas, &ina, minorVersion);
|
|
if ( ! allocpiiu ) {
|
|
piiu->pcas->unlock ();
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* If this is the first channel to be
|
|
* added to this niiu then communicate
|
|
* the client's name to the server.
|
|
* (CA V4.1 or higher)
|
|
*/
|
|
if ( ellCount ( &allocpiiu->chidList ) == 0 ) {
|
|
allocpiiu->userNameSetMsg ();
|
|
allocpiiu->hostNameSetMsg ();
|
|
}
|
|
|
|
piiu->pcas->notifySearchResponse ( chan->retrySeqNo );
|
|
|
|
/*
|
|
* Assume that we have access once connected briefly
|
|
* until the server is able to tell us the correct
|
|
* state for backwards compatibility.
|
|
*
|
|
* Their access rights call back does not get
|
|
* called for the first time until the information
|
|
* arrives however.
|
|
*/
|
|
chan->ar.read_access = TRUE;
|
|
chan->ar.write_access = TRUE;
|
|
|
|
/*
|
|
* remove it from the broadcast niiu
|
|
*/
|
|
chan->piiu->removeFromChanList ( *chan );
|
|
|
|
/*
|
|
* chan->piiu must be correctly set prior to issuing the
|
|
* claim request
|
|
*
|
|
* add to the beginning of the list until we
|
|
* have sent the claim message (after which we
|
|
* move it to the end of the list)
|
|
*
|
|
* claim pending flag is set here
|
|
*/
|
|
allocpiiu->addToChanList ( *chan );
|
|
|
|
if ( CA_V42 ( CA_PROTOCOL_VERSION, minorVersion ) ) {
|
|
chan->searchReplySetUp ( pMsg->m_cid, USHRT_MAX, 0 );
|
|
}
|
|
else {
|
|
chan->searchReplySetUp ( pMsg->m_cid, pMsg->m_dataType, pMsg->m_count );
|
|
}
|
|
|
|
chan->claimMsg ( allocpiiu );
|
|
cacRingBufferWriteFlush ( &allocpiiu->send );
|
|
|
|
piiu->pcas->unlock ();
|
|
}
|
|
|
|
|
|
/*
|
|
* beacon_action ()
|
|
*/
|
|
LOCAL void beacon_action ( udpiiu * piiu,
|
|
caHdr *pMsg, const struct sockaddr_in *pnet_addr)
|
|
{
|
|
struct sockaddr_in ina;
|
|
|
|
piiu->pcas->lock ();
|
|
|
|
/*
|
|
* 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 htonl(INADDR_ANY)
|
|
* new servers:
|
|
* always set this field to htonl(INADDR_ANY)
|
|
*
|
|
* clients always assume that if this
|
|
* field is set to something that isnt htonl(INADDR_ANY)
|
|
* then it is the overriding IP address of the server.
|
|
*/
|
|
ina.sin_family = AF_INET;
|
|
if ( pMsg->m_available != htonl (INADDR_ANY) ) {
|
|
ina.sin_addr.s_addr = pMsg->m_available;
|
|
}
|
|
else {
|
|
ina.sin_addr = pnet_addr->sin_addr;
|
|
}
|
|
if ( pMsg->m_count != 0 ) {
|
|
ina.sin_port = htons ( pMsg->m_count );
|
|
}
|
|
else {
|
|
/*
|
|
* old servers dont supply this and the
|
|
* default port must be assumed
|
|
*/
|
|
ina.sin_port = htons (piiu->pcas->ca_server_port);
|
|
}
|
|
piiu->pcas->beaconNotify (ina);
|
|
|
|
piiu->pcas->unlock ();
|
|
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* repeater_ack_action ()
|
|
*/
|
|
LOCAL void repeater_ack_action (udpiiu * piiu,
|
|
caHdr * /* pMsg */, const struct sockaddr_in * /* pnet_addr */)
|
|
{
|
|
piiu->pcas->repeaterSubscribeConfirmNotify ();
|
|
}
|
|
|
|
/*
|
|
* not_here_resp_action ()
|
|
*/
|
|
LOCAL void not_here_resp_action (udpiiu * /* piiu */, caHdr * /* pMsg */, const struct sockaddr_in * /* pnet_addr */)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* udp_exception_resp_action ()
|
|
*/
|
|
LOCAL void udp_exception_resp_action ( udpiiu *piiu,
|
|
caHdr *pMsg, const struct sockaddr_in *pnet_addr )
|
|
{
|
|
caHdr *pReqMsg = pMsg + 1;
|
|
char name[64];
|
|
|
|
ipAddrToA ( pnet_addr, name, sizeof ( name ) );
|
|
|
|
if ( pMsg->m_postsize > sizeof (caHdr) ){
|
|
errlogPrintf ( "error condition \"%s\" detected by %s with context \"%s\"\n",
|
|
ca_message ( ntohl ( pMsg->m_available ) ),
|
|
name, reinterpret_cast <char *> ( pReqMsg + 1 ) );
|
|
}
|
|
else{
|
|
errlogPrintf ( "error condition \"%s\" detected by %s\n",
|
|
ca_message ( ntohl ( pMsg->m_available ) ), name );
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*
|
|
* UDP protocol jump table
|
|
*/
|
|
LOCAL const pProtoStubUDP udpJumpTableCAC[] =
|
|
{
|
|
udp_noop_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
search_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
udp_exception_resp_action,
|
|
bad_udp_resp_action,
|
|
beacon_action,
|
|
not_here_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
repeater_ack_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action,
|
|
bad_udp_resp_action
|
|
};
|
|
|
|
/*
|
|
* post_udp_msg ()
|
|
*/
|
|
int udpiiu::post_msg (const struct sockaddr_in *pnet_addr,
|
|
char *pInBuf, unsigned long blockSize)
|
|
{
|
|
caHdr *pCurMsg;
|
|
|
|
while ( blockSize ) {
|
|
unsigned long size;
|
|
|
|
if ( blockSize < sizeof (*pCurMsg) ) {
|
|
return ECA_TOLARGE;
|
|
}
|
|
|
|
pCurMsg = reinterpret_cast <caHdr *> (pInBuf);
|
|
|
|
/*
|
|
* fix endian of bytes
|
|
*/
|
|
pCurMsg->m_postsize = ntohs (pCurMsg->m_postsize);
|
|
pCurMsg->m_cmmd = ntohs (pCurMsg->m_cmmd);
|
|
pCurMsg->m_dataType = ntohs (pCurMsg->m_dataType);
|
|
pCurMsg->m_count = ntohs (pCurMsg->m_count);
|
|
|
|
#if 0
|
|
printf ("UDP Cmd=%3d Type=%3d Count=%4d Size=%4d",
|
|
pCurMsg->m_cmmd,
|
|
pCurMsg->m_dataType,
|
|
pCurMsg->m_count,
|
|
pCurMsg->m_postsize);
|
|
printf (" Avail=%8x Cid=%6d\n",
|
|
pCurMsg->m_available,
|
|
pCurMsg->m_cid);
|
|
#endif
|
|
|
|
size = pCurMsg->m_postsize + sizeof (*pCurMsg);
|
|
|
|
/*
|
|
* dont allow msg body extending beyond frame boundary
|
|
*/
|
|
if ( size > blockSize ) {
|
|
return ECA_TOLARGE;
|
|
}
|
|
|
|
/*
|
|
* execute the response message
|
|
*/
|
|
pProtoStubUDP pStub;
|
|
if ( pCurMsg->m_cmmd>=NELEMENTS (udpJumpTableCAC) ) {
|
|
pStub = bad_udp_resp_action;
|
|
}
|
|
else {
|
|
pStub = udpJumpTableCAC [pCurMsg->m_cmmd];
|
|
}
|
|
(*pStub) (this, pCurMsg, pnet_addr);
|
|
|
|
blockSize -= size;
|
|
pInBuf += size;;
|
|
}
|
|
return ECA_NORMAL;
|
|
}
|
|
|
|
void udpiiu::hostName ( char *pBuf, unsigned bufLength ) const
|
|
{
|
|
if ( bufLength ) {
|
|
strncpy ( pBuf, this->pHostName (), bufLength );
|
|
pBuf[bufLength - 1u] = '\0';
|
|
}
|
|
}
|
|
|
|
const char * udpiiu::pHostName () const
|
|
{
|
|
return "<disconnected>";
|
|
}
|
|
|
|
bool udpiiu::ca_v42_ok () const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool udpiiu::ca_v41_ok () const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool udpiiu::compareIfTCP (nciu &, const sockaddr_in &) const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* Add chan to iiu and guarantee that
|
|
* one chan on the B cast iiu list is pointed to by
|
|
* ca_pEndOfBCastList
|
|
*/
|
|
void udpiiu::addToChanList ( nciu &chan )
|
|
{
|
|
this->pcas->lock ();
|
|
|
|
/*
|
|
* add to the beginning of the list so that search requests for
|
|
* this channel will be sent first (since the retry count is zero)
|
|
*/
|
|
if ( ellCount ( &this->chidList ) == 0 ) {
|
|
this->pcas->endOfBCastList = tsDLIterBD <nciu> ( &chan );
|
|
}
|
|
/*
|
|
* add to the front of the list so that
|
|
* search requests for new channels will be sent first
|
|
*/
|
|
chan.retry = 0u;
|
|
this->chidList.push ( chan );
|
|
chan.piiu = this;
|
|
|
|
this->pcas->unlock ();
|
|
}
|
|
|
|
void udpiiu::removeFromChanList ( nciu &chan )
|
|
{
|
|
tsDLIterBD <nciu> iter ( &chan );
|
|
|
|
this->pcas->lock ();
|
|
if ( chan.piiu->pcas->endOfBCastList == iter ) {
|
|
if ( iter.itemBefore ().valid () ) {
|
|
chan.piiu->pcas->endOfBCastList = iter.itemBefore ();
|
|
}
|
|
else {
|
|
chan.piiu->pcas->endOfBCastList =
|
|
tsDLIterBD<nciu> ( chan.piiu->chidList.last () );
|
|
}
|
|
}
|
|
chan.piiu->chidList.remove ( chan );
|
|
chan.piiu = NULL;
|
|
this->pcas->unlock ();
|
|
}
|
|
|
|
void udpiiu::disconnect ( nciu & /* chan */ )
|
|
{
|
|
// NOOP
|
|
}
|
|
|
|
/*
|
|
* udpiiu::pushDatagramMsg ()
|
|
*/
|
|
int udpiiu::pushDatagramMsg (const caHdr *pMsg, const void *pExt, ca_uint16_t extsize)
|
|
{
|
|
unsigned long msgsize;
|
|
ca_uint16_t allignedExtSize;
|
|
caHdr *pbufmsg;
|
|
|
|
allignedExtSize = CA_MESSAGE_ALIGN (extsize);
|
|
msgsize = sizeof (caHdr) + allignedExtSize;
|
|
|
|
|
|
/* fail out if max message size exceeded */
|
|
if ( msgsize >= sizeof (this->xmitBuf)-7 ) {
|
|
return ECA_TOLARGE;
|
|
}
|
|
|
|
semMutexMustTake (this->xmitBufLock);
|
|
|
|
if ( msgsize + this->nBytesInXmitBuf > sizeof ( this->xmitBuf ) ) {
|
|
semMutexGive (this->xmitBufLock);
|
|
return ECA_TOLARGE;
|
|
}
|
|
|
|
pbufmsg = (caHdr *) &this->xmitBuf[this->nBytesInXmitBuf];
|
|
*pbufmsg = *pMsg;
|
|
memcpy (pbufmsg+1, pExt, extsize);
|
|
if ( extsize != allignedExtSize ) {
|
|
char *pDest = (char *) (pbufmsg+1);
|
|
memset (pDest + extsize, '\0', allignedExtSize - extsize);
|
|
}
|
|
pbufmsg->m_postsize = htons (allignedExtSize);
|
|
this->nBytesInXmitBuf += msgsize;
|
|
|
|
semMutexGive (this->xmitBufLock);
|
|
|
|
return ECA_NORMAL;
|
|
}
|
|
|
|
//
|
|
// udpiiu::flush ()
|
|
//
|
|
void udpiiu::flush ()
|
|
{
|
|
osiSockAddrNode *pNode;
|
|
|
|
semMutexMustTake (this->xmitBufLock);
|
|
|
|
pNode = (osiSockAddrNode *) ellFirst ( &this->dest );
|
|
while ( pNode ) {
|
|
int status;
|
|
|
|
assert ( this->nBytesInXmitBuf <= INT_MAX );
|
|
status = sendto ( this->sock, this->xmitBuf,
|
|
(int) this->nBytesInXmitBuf, 0,
|
|
&pNode->addr.sa, sizeof ( pNode->addr.sa ) );
|
|
if ( status != (int) this->nBytesInXmitBuf ) {
|
|
if ( status >= 0 ) {
|
|
ca_printf ( "CAC: UDP sendto () call returned strange xmit count?\n" );
|
|
break;
|
|
}
|
|
else {
|
|
int localErrno = SOCKERRNO;
|
|
|
|
if ( localErrno == SOCK_EINTR ) {
|
|
if ( this->shutdownCmd ) {
|
|
break;
|
|
}
|
|
else {
|
|
continue;
|
|
}
|
|
}
|
|
else if ( localErrno == SOCK_SHUTDOWN ) {
|
|
break;
|
|
}
|
|
else if ( localErrno == SOCK_ENOTSOCK ) {
|
|
break;
|
|
}
|
|
else if ( localErrno == SOCK_EBADF ) {
|
|
break;
|
|
}
|
|
else {
|
|
char buf[64];
|
|
|
|
ipAddrToA ( &pNode->addr.ia, buf, sizeof ( buf ) );
|
|
|
|
ca_printf (
|
|
"CAC: error = \"%s\" sending UDP msg to %s\n",
|
|
SOCKERRSTR ( localErrno ), buf);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
pNode = (osiSockAddrNode *) ellNext ( &pNode->node );
|
|
}
|
|
|
|
this->nBytesInXmitBuf = 0u;
|
|
|
|
semMutexGive ( this->xmitBufLock );
|
|
}
|
|
|
|
int udpiiu::pushStreamMsg ( const caHdr * /* pmsg */,
|
|
const void * /* pext */, bool /* blockingOk */ )
|
|
{
|
|
ca_printf ("in pushStreamMsg () for a udp iiu?\n");
|
|
return ECA_DISCONNCHID;
|
|
}
|
|
|
|
SOCKET udpiiu::getSock () const
|
|
{
|
|
return this->sock;
|
|
} |