GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/talk/look_up.c Lines: 0 27 0.0 %
Date: 2017-11-13 Branches: 0 12 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: look_up.c,v 1.13 2016/02/01 07:29:25 mestre Exp $	*/
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/*	$NetBSD: look_up.c,v 1.3 1994/12/09 02:14:21 jtc Exp $	*/
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/*
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 * Copyright (c) 1983, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/socket.h>
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#include <errno.h>
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#include <unistd.h>
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#include "talk.h"
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#include "talk_ctl.h"
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/*
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 * See if the local daemon has an invitation for us.
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 */
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int
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check_local(void)
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{
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	CTL_RESPONSE response;
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	/* the rest of msg was set up in get_names */
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#ifdef MSG_EOR
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	/* copy new style sockaddr to old, swap family (short in old) */
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	msg.ctl_addr = *(struct osockaddr *)&ctl_addr;
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	msg.ctl_addr.sa_family = htons(ctl_addr.sin_family);
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#else
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	msg.ctl_addr = *(struct sockaddr *)&ctl_addr;
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#endif
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	/* must be initiating a talk */
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	if (!look_for_invite(&response))
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		return (0);
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	/*
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	 * There was an invitation waiting for us,
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	 * so connect with the other (hopefully waiting) party
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	 */
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	current_state = "Waiting to connect with caller";
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	do {
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		if (ntohs(response.addr.sa_family) != AF_INET)
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			quit("Response uses invalid network address", 1);
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		errno = 0;
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		if (connect(sockt, (struct sockaddr *)&response.addr,
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			    sizeof (response.addr)) != -1)
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			return (1);
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	} while (errno == EINTR);
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	if (errno == ECONNREFUSED) {
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		/*
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		 * The caller gave up, but his invitation somehow
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		 * was not cleared. Clear it and initiate an
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		 * invitation. (We know there are no newer invitations,
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		 * the talkd works LIFO.)
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		 */
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		ctl_transact(his_machine_addr, msg, DELETE, &response);
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		close(sockt);
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		open_sockt();
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		return (0);
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	}
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	quit("Unable to connect with initiator", 1);
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	return (0);
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}
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/*
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 * Look for an invitation on 'machine'
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 */
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int
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look_for_invite(CTL_RESPONSE *rp)
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{
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	current_state = "Checking for invitation on caller's machine";
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	ctl_transact(his_machine_addr, msg, LOOK_UP, rp);
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	/* the switch is for later options, such as multiple invitations */
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	switch (rp->answer) {
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	case SUCCESS:
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		msg.id_num = htonl(rp->id_num);
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		return (1);
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	default:
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		/* there wasn't an invitation waiting for us */
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		return (0);
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	}
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}