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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/talk/invite.c	Lines:	0	63	0.0 %
Date:	2017-11-07	Branches:	0	22	0.0 %


/*	$OpenBSD: invite.c,v 1.17 2016/03/16 15:41:11 krw Exp $	*/
/*	$NetBSD: invite.c,v 1.3 1994/12/09 02:14:18 jtc Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/socket.h>
#include <arpa/inet.h>

#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <setjmp.h>
#include <unistd.h>

#include "talk.h"
#include "talk_ctl.h"

#define STRING_LENGTH 158

/*
 * There wasn't an invitation waiting, so send a request containing
 * our sockt address to the remote talk daemon so it can invite
 * him
 */

/*
 * The msg.id's for the invitations
 * on the local and remote machines.
 * These are used to delete the
 * invitations.
 */
int	local_id, remote_id;
jmp_buf invitebuf;

void
invite_remote(void)
{
	int new_sockt;
	struct itimerval itimer;
	CTL_RESPONSE response;
	struct sockaddr rp;
	socklen_t rplen = sizeof(struct sockaddr);
	struct hostent *rphost;
	char rname[STRING_LENGTH];

	itimer.it_value.tv_sec = RING_WAIT;
	itimer.it_value.tv_usec = 0;
	itimer.it_interval = itimer.it_value;
	if (listen(sockt, 5) != 0)
		quit("Error on attempt to listen for caller", 1);
#ifdef MSG_EOR
	/* copy new style sockaddr to old, swap family (short in old) */
	msg.addr = *(struct osockaddr *)&my_addr;  /* XXX new to old  style*/
	msg.addr.sa_family = htons(my_addr.sin_family);
#else
	msg.addr = *(struct sockaddr *)&my_addr;
#endif
	msg.id_num = htonl(-1);		/* an impossible id_num */
	invitation_waiting = 1;
	announce_invite();
	/*
	 * Shut off the automatic messages for a while,
	 * so we can use the interrupt timer to resend the invitation.
	 * We no longer turn automatic messages back on to avoid a bonus
	 * message after we've connected; this is okay even though end_msgs()
	 * gets called again in main().
	 */
	end_msgs();
	setitimer(ITIMER_REAL, &itimer, NULL);
	message("Waiting for your party to respond");
	signal(SIGALRM, re_invite);
	(void) setjmp(invitebuf);
	while ((new_sockt = accept(sockt, &rp, &rplen)) == -1) {
		if (errno == EINTR || errno == EWOULDBLOCK ||
		    errno == ECONNABORTED)
			continue;
		quit("Unable to connect with your party", 1);
	}
	close(sockt);
	sockt = new_sockt;

	/*
	 * Have the daemons delete the invitations now that we
	 * have connected.
	 */
	msg.id_num = htonl(local_id);
	ctl_transact(my_machine_addr, msg, DELETE, &response);
	msg.id_num = htonl(remote_id);
	ctl_transact(his_machine_addr, msg, DELETE, &response);
	invitation_waiting = 0;

	/*
	 * Check to see if the other guy is coming from the machine
	 * we expect.
	 */
	if (his_machine_addr.s_addr !=
	    ((struct sockaddr_in *)&rp)->sin_addr.s_addr) {
		rphost = gethostbyaddr((char *) &((struct sockaddr_in
		    *)&rp)->sin_addr, sizeof(struct in_addr), AF_INET);
		if (rphost)
			snprintf(rname, STRING_LENGTH,
			    "Answering talk request from %s@%s", msg.r_name,
			    rphost->h_name);
		else
			snprintf(rname, STRING_LENGTH,
			    "Answering talk request from %s@%s", msg.r_name,
			    inet_ntoa(((struct sockaddr_in *)&rp)->sin_addr));
		message(rname);
	}
}

/*
 * Routine called on interrupt to re-invite the callee
 */
void
re_invite(int dummy)
{
	message("Ringing your party again");
	/* force a re-announce */
	msg.id_num = htonl(remote_id + 1);
	announce_invite();
	longjmp(invitebuf, 1);
}

static	char *answers[] = {
	"answer #0",					/* SUCCESS */
	"Your party is not logged on",			/* NOT_HERE */
	"Target machine is too confused to talk to us",	/* FAILED */
	"Target machine does not recognize us",		/* MACHINE_UNKNOWN */
	"Your party is refusing messages",		/* PERMISSION_REFUSED */
	"Target machine can not handle remote talk",	/* UNKNOWN_REQUEST */
	"Target machine indicates protocol mismatch",	/* BADVERSION */
	"Target machine indicates protocol botch (addr)",/* BADADDR */
	"Target machine indicates protocol botch (ctl_addr)",/* BADCTLADDR */
};
#define NANSWERS (sizeof (answers) / sizeof (answers[0]))

/*
 * Transmit the invitation and process the response
 */
void
announce_invite(void)
{
	CTL_RESPONSE response;

	current_state = "Trying to connect to your party's talk daemon";
	ctl_transact(his_machine_addr, msg, ANNOUNCE, &response);
	remote_id = response.id_num;
	if (response.answer != SUCCESS)
		quit(response.answer < NANSWERS ? answers[response.answer] : NULL, 0);
	/* leave the actual invitation on my talk daemon */
	ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response);
	local_id = response.id_num;
}

/*
 * Tell the daemon to remove your invitation
 */
void
send_delete(void)
{

	msg.type = DELETE;
	/*
	 * This is just a extra clean up, so just send it
	 * and don't wait for an answer
	 */
	msg.id_num = htonl(remote_id);
	daemon_addr.sin_addr = his_machine_addr;
	if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
	    (struct sockaddr *)&daemon_addr,
	    sizeof (daemon_addr)) != sizeof(msg))
		warn("send_delete (remote)");
	msg.id_num = htonl(local_id);
	daemon_addr.sin_addr = my_machine_addr;
	if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
	    (struct sockaddr *)&daemon_addr,
	    sizeof (daemon_addr)) != sizeof (msg))
		warn("send_delete (local)");
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: invite.c,v 1.17 2016/03/16 15:41:11 krw Exp $ */
2			/* $NetBSD: invite.c,v 1.3 1994/12/09 02:14:18 jtc Exp $ */
3
4			/*
5			* Copyright (c) 1983, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/socket.h>
34			#include <arpa/inet.h>
35
36			#include <err.h>
37			#include <errno.h>
38			#include <netdb.h>
39			#include <setjmp.h>
40			#include <unistd.h>
41
42			#include "talk.h"
43			#include "talk_ctl.h"
44
45			#define STRING_LENGTH 158
46
47			/*
48			* There wasn't an invitation waiting, so send a request containing
49			* our sockt address to the remote talk daemon so it can invite
50			* him
51			*/
52
53			/*
54			* The msg.id's for the invitations
55			* on the local and remote machines.
56			* These are used to delete the
57			* invitations.
58			*/
59			int local_id, remote_id;
60			jmp_buf invitebuf;
61
62			void
63			invite_remote(void)
64			{
65			int new_sockt;
66			struct itimerval itimer;
67			CTL_RESPONSE response;
68			struct sockaddr rp;
69			socklen_t rplen = sizeof(struct sockaddr);
70			struct hostent *rphost;
71			char rname[STRING_LENGTH];
72
73			itimer.it_value.tv_sec = RING_WAIT;
74			itimer.it_value.tv_usec = 0;
75			itimer.it_interval = itimer.it_value;
76			if (listen(sockt, 5) != 0)
77			quit("Error on attempt to listen for caller", 1);
78			#ifdef MSG_EOR
79			/* copy new style sockaddr to old, swap family (short in old) */
80			msg.addr = (struct osockaddr )&my_addr; /* XXX new to old style*/
81			msg.addr.sa_family = htons(my_addr.sin_family);
82			#else
83			msg.addr = (struct sockaddr )&my_addr;
84			#endif
85			msg.id_num = htonl(-1); /* an impossible id_num */
86			invitation_waiting = 1;
87			announce_invite();
88			/*
89			* Shut off the automatic messages for a while,
90			* so we can use the interrupt timer to resend the invitation.
91			* We no longer turn automatic messages back on to avoid a bonus
92			* message after we've connected; this is okay even though end_msgs()
93			* gets called again in main().
94			*/
95			end_msgs();
96			setitimer(ITIMER_REAL, &itimer, NULL);
97			message("Waiting for your party to respond");
98			signal(SIGALRM, re_invite);
99			(void) setjmp(invitebuf);
100			while ((new_sockt = accept(sockt, &rp, &rplen)) == -1) {
101			if (errno == EINTR \|\| errno == EWOULDBLOCK \|\|
102			errno == ECONNABORTED)
103			continue;
104			quit("Unable to connect with your party", 1);
105			}
106			close(sockt);
107			sockt = new_sockt;
108
109			/*
110			* Have the daemons delete the invitations now that we
111			* have connected.
112			*/
113			msg.id_num = htonl(local_id);
114			ctl_transact(my_machine_addr, msg, DELETE, &response);
115			msg.id_num = htonl(remote_id);
116			ctl_transact(his_machine_addr, msg, DELETE, &response);
117			invitation_waiting = 0;
118
119			/*
120			* Check to see if the other guy is coming from the machine
121			* we expect.
122			*/
123			if (his_machine_addr.s_addr !=
124			((struct sockaddr_in *)&rp)->sin_addr.s_addr) {
125			rphost = gethostbyaddr((char *) &((struct sockaddr_in
126			*)&rp)->sin_addr, sizeof(struct in_addr), AF_INET);
127			if (rphost)
128			snprintf(rname, STRING_LENGTH,
129			"Answering talk request from %s@%s", msg.r_name,
130			rphost->h_name);
131			else
132			snprintf(rname, STRING_LENGTH,
133			"Answering talk request from %s@%s", msg.r_name,
134			inet_ntoa(((struct sockaddr_in *)&rp)->sin_addr));
135			message(rname);
136			}
137			}
138
139			/*
140			* Routine called on interrupt to re-invite the callee
141			*/
142			void
143			re_invite(int dummy)
144			{
145			message("Ringing your party again");
146			/* force a re-announce */
147			msg.id_num = htonl(remote_id + 1);
148			announce_invite();
149			longjmp(invitebuf, 1);
150			}
151
152			static char *answers[] = {
153			"answer #0", /* SUCCESS */
154			"Your party is not logged on", /* NOT_HERE */
155			"Target machine is too confused to talk to us", /* FAILED */
156			"Target machine does not recognize us", /* MACHINE_UNKNOWN */
157			"Your party is refusing messages", /* PERMISSION_REFUSED */
158			"Target machine can not handle remote talk", /* UNKNOWN_REQUEST */
159			"Target machine indicates protocol mismatch", /* BADVERSION */
160			"Target machine indicates protocol botch (addr)",/* BADADDR */
161			"Target machine indicates protocol botch (ctl_addr)",/* BADCTLADDR */
162			};
163			#define NANSWERS (sizeof (answers) / sizeof (answers[0]))
164
165			/*
166			* Transmit the invitation and process the response
167			*/
168			void
169			announce_invite(void)
170			{
171			CTL_RESPONSE response;
172
173			current_state = "Trying to connect to your party's talk daemon";
174			ctl_transact(his_machine_addr, msg, ANNOUNCE, &response);
175			remote_id = response.id_num;
176			if (response.answer != SUCCESS)
177			quit(response.answer < NANSWERS ? answers[response.answer] : NULL, 0);
178			/* leave the actual invitation on my talk daemon */
179			ctl_transact(my_machine_addr, msg, LEAVE_INVITE, &response);
180			local_id = response.id_num;
181			}
182
183			/*
184			* Tell the daemon to remove your invitation
185			*/
186			void
187			send_delete(void)
188			{
189
190			msg.type = DELETE;
191			/*
192			* This is just a extra clean up, so just send it
193			* and don't wait for an answer
194			*/
195			msg.id_num = htonl(remote_id);
196			daemon_addr.sin_addr = his_machine_addr;
197			if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
198			(struct sockaddr *)&daemon_addr,
199			sizeof (daemon_addr)) != sizeof(msg))
200			warn("send_delete (remote)");
201			msg.id_num = htonl(local_id);
202			daemon_addr.sin_addr = my_machine_addr;
203			if (sendto(ctl_sockt, &msg, sizeof (msg), 0,
204			(struct sockaddr *)&daemon_addr,
205			sizeof (daemon_addr)) != sizeof (msg))
206			warn("send_delete (local)");
207			}