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/*
* SCCS: @(#)connect.c 1.12 (98/09/01)
*
* UniSoft Ltd., London, England
*
* (C) Copyright 1992 X/Open Company Limited
*
* All rights reserved. No part of this source code may be reproduced,
* stored in a retrieval system, or transmitted, in any form or by any
* means, electronic, mechanical, photocopying, recording or otherwise,
* except as stated in the end-user licence agreement, without the prior
* permission of the copyright owners.
*
* X/Open and the 'X' symbol are trademarks of X/Open Company Limited in
* the UK and other countries.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/************************************************************************
SCCS: @(#)connect.c 1.12 98/09/01 TETware release 3.3
NAME: connect.c
PRODUCT: TETware
AUTHOR: Andrew Dingwall, UniSoft Ltd.
DATE CREATED: April 1992
DESCRIPTION:
required transport-specific library interface
function to initiate connection to remote process
MODIFICATIONS:
Denis McConalogue, UniSoft Limited, September 1993
added tet_ts_disconnect() function
Denis McConalogue, UniSoft Limited, September 1993
make sure socket descriptor allocated is not 0, 1, or 2.
Andrew Dingwall, UniSoft Ltd., December 1993
moved disconnect stuff to a separate file
Andrew Dingwall, UniSoft Ltd., February 1995
clear sockaddr_in before using it
Andrew Dingwall, UniSoft Ltd., March 1997
remove #ifndef __hpux from #include <arpa/inet.h>
since current HP-UX implementations now have this file
Andrew Dingwall, UniSoft Ltd., July 1998
Report destination address/port if connect fails.
Added support for shared API libraries.
Aaron Plattner, April 2010
Fixed warnings when compiled with GCC's -Wall option.
************************************************************************/
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
# include <unistd.h>
# include <sys/uio.h>
# include <sys/socket.h>
# include <netinet/in.h>
# include <arpa/inet.h>
#include "dtmac.h"
#include "dtmsg.h"
#include "ptab.h"
#include "tptab_in.h"
#include "error.h"
#include "ltoa.h"
#include "bstring.h"
#include "tslib.h"
#include "server_in.h"
/*
** tet_ts_connect() - make a connection to a remote process
*/
TET_IMPORT void tet_ts_connect(pp)
register struct ptab *pp;
{
register struct tptab *tp = (struct tptab *) pp->pt_tdata;
register int rc;
register SOCKET sd;
register int nsd;
struct sockaddr_in sin;
int err;
static char fmt[] = "connect to %.16s port %d failed";
char msg[sizeof fmt + 16 + LNUMSZ];
/* get a socket for the connection */
if ((sd = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
error(SOCKET_ERRNO, "can't get socket", (char *) 0);
pp->pt_state = PS_DEAD;
pp->pt_flags |= PF_ATTENTION;
return;
}
/* ensure that socket is not on stdin, stdout or stderr */
if (sd < 3) {
bzero((char *) &sin, sizeof sin);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = 0;
errno = 0;
if (bind(sd, (struct sockaddr *) &sin, sizeof sin) < 0) {
error(errno, "can't bind client socket", (char *) 0);
pp->pt_state = PS_DEAD;
pp->pt_flags |= PF_ATTENTION;
return;
}
if ((nsd = fcntl(sd, F_DUPFD, 3)) < 3) {
error(errno, "can't dup socket", (char *) 0);
pp->pt_state = PS_DEAD;
pp->pt_flags |= PF_ATTENTION;
return;
}
(void) close(sd);
sd = nsd;
}
tp->tp_sd = sd;
/* call the server-specific connect routine to massage the socket and
fill in network address */
if (tet_ss_tsconnect(pp) < 0) {
pp->pt_state = PS_DEAD;
pp->pt_flags |= PF_ATTENTION;
return;
}
TRACE5(tet_Tio, 4, "connect to %s on port %s using sd %s %s",
inet_ntoa(tp->tp_sin.sin_addr),
tet_i2a(ntohs(tp->tp_sin.sin_port)),
tet_i2a(tp->tp_sd), tet_r2a(&pp->pt_rid));
/* attempt the connection */
do {
err = 0;
if ((rc = connect(sd, (struct sockaddr *) &tp->tp_sin, sizeof tp->tp_sin)) == SOCKET_ERROR)
err = SOCKET_ERRNO;
} while (rc == SOCKET_ERROR && err == SOCKET_EINTR);
/* handle errors */
if (rc == SOCKET_ERROR) {
switch (err) {
case SOCKET_EWOULDBLOCK:
case SOCKET_EINPROGRESS:
if (pp->pt_flags & PF_NBIO) {
TRACE1(tet_Tio, 6, "connect in progress");
pp->pt_flags |= PF_INPROGRESS;
return;
}
/* else fall through */
default:
(void) sprintf(msg, fmt,
inet_ntoa(tp->tp_sin.sin_addr),
(int) ntohs(tp->tp_sin.sin_port));
error(err, msg, tet_r2a(&pp->pt_rid));
pp->pt_state = PS_DEAD;
}
}
else {
TRACE1(tet_Tio, 6, "connect succeeded");
pp->pt_flags |= PF_CONNECTED;
}
/* here if the connect call completed one way or the other */
pp->pt_flags |= PF_ATTENTION;
}
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