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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/dvmrpd/control.c	Lines:	0	132	0.0 %
Date:	2017-11-07	Branches:	0	81	0.0 %


/*	$OpenBSD: control.c,v 1.23 2017/01/08 23:04:42 krw Exp $ */

/*
 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "igmp.h"
#include "dvmrpd.h"
#include "dvmrp.h"
#include "dvmrpe.h"
#include "log.h"
#include "control.h"

#define	CONTROL_BACKLOG	5

struct ctl_conn	*control_connbyfd(int);
struct ctl_conn	*control_connbypid(pid_t);
void		 control_close(int);

int
control_init(void)
{
	struct sockaddr_un	 sun;
	int			 fd;
	mode_t			 old_umask;

	if ((fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK,
	    0)) == -1) {
		log_warn("control_init: socket");
		return (-1);
	}

	memset(&sun, 0, sizeof(sun));
	sun.sun_family = AF_UNIX;
	strlcpy(sun.sun_path, DVMRPD_SOCKET, sizeof(sun.sun_path));

	if (unlink(DVMRPD_SOCKET) == -1)
		if (errno != ENOENT) {
			log_warn("control_init: unlink %s", DVMRPD_SOCKET);
			close(fd);
			return (-1);
		}

	old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
	if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
		log_warn("control_init: bind: %s", DVMRPD_SOCKET);
		close(fd);
		umask(old_umask);
		return (-1);
	}
	umask(old_umask);

	if (chmod(DVMRPD_SOCKET, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP) == -1) {
		log_warn("control_init: chmod");
		close(fd);
		(void)unlink(DVMRPD_SOCKET);
		return (-1);
	}

	control_state.fd = fd;

	return (0);
}

int
control_listen(void)
{

	if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
		log_warn("control_listen: listen");
		return (-1);
	}

	event_set(&control_state.ev, control_state.fd, EV_READ,
	    control_accept, NULL);
	event_add(&control_state.ev, NULL);
	evtimer_set(&control_state.evt, control_accept, NULL);

	return (0);
}

void
control_cleanup(void)
{
	event_del(&control_state.ev);
	event_del(&control_state.evt);
	unlink(DVMRPD_SOCKET);
}

/* ARGSUSED */
void
control_accept(int listenfd, short event, void *bula)
{
	int			 connfd;
	socklen_t		 len;
	struct sockaddr_un	 sun;
	struct ctl_conn		*c;

	event_add(&control_state.ev, NULL);
	if ((event & EV_TIMEOUT))
		return;

	len = sizeof(sun);
	if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
	    SOCK_NONBLOCK | SOCK_CLOEXEC)) == -1) {
		/*
		 * Pause accept if we are out of file descriptors, or
		 * libevent will haunt us here too.
		 */
		if (errno == ENFILE || errno == EMFILE) {
			struct timeval evtpause = { 1, 0 };

			event_del(&control_state.ev);
			evtimer_add(&control_state.evt, &evtpause);
		} else if (errno != EWOULDBLOCK && errno != EINTR &&
		    errno != ECONNABORTED)
			log_warn("control_accept: accept");
		return;
	}

	if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
		log_warn("control_accept");
		close(connfd);
		return;
	}

	imsg_init(&c->iev.ibuf, connfd);
	c->iev.handler = control_dispatch_imsg;
	c->iev.events = EV_READ;
	event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
	    c->iev.handler, &c->iev);
	event_add(&c->iev.ev, NULL);

	TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
}

struct ctl_conn *
control_connbyfd(int fd)
{
	struct ctl_conn	*c;

	TAILQ_FOREACH(c, &ctl_conns, entry) {
		if (c->iev.ibuf.fd == fd)
			break;
	}

	return (c);
}

struct ctl_conn *
control_connbypid(pid_t pid)
{
	struct ctl_conn	*c;

	TAILQ_FOREACH(c, &ctl_conns, entry) {
		if (c->iev.ibuf.pid == pid)
			break;
	}

	return (c);
}

void
control_close(int fd)
{
	struct ctl_conn	*c;

	if ((c = control_connbyfd(fd)) == NULL) {
		log_warn("control_close: fd %d: not found", fd);
		return;
	}

	msgbuf_clear(&c->iev.ibuf.w);
	TAILQ_REMOVE(&ctl_conns, c, entry);

	event_del(&c->iev.ev);
	close(c->iev.ibuf.fd);

	/* Some file descriptors are available again. */
	if (evtimer_pending(&control_state.evt, NULL)) {
		evtimer_del(&control_state.evt);
		event_add(&control_state.ev, NULL);
	}

	free(c);
}

/* ARGSUSED */
void
control_dispatch_imsg(int fd, short event, void *bula)
{
	struct ctl_conn	*c;
	struct imsg	 imsg;
	int		 n;
	unsigned int	 ifidx;
	int		 verbose;

	if ((c = control_connbyfd(fd)) == NULL) {
		log_warn("control_dispatch_imsg: fd %d: not found", fd);
		return;
	}

	if (event & EV_READ) {
		if (((n = imsg_read(&c->iev.ibuf)) == -1  && errno != EAGAIN) ||
		    n == 0) {
			control_close(fd);
			return;
		}
	}
	if (event & EV_WRITE) {
		if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
			control_close(fd);
			return;
		}
	}

	for (;;) {
		if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
			control_close(fd);
			return;
		}

		if (n == 0)
			break;

		switch (imsg.hdr.type) {
		case IMSG_CTL_MFC_COUPLE:
		case IMSG_CTL_MFC_DECOUPLE:
		case IMSG_CTL_RELOAD:
			dvmrpe_imsg_compose_parent(imsg.hdr.type, 0, NULL, 0);
			break;
		case IMSG_CTL_SHOW_IFACE:
			if (imsg.hdr.len == IMSG_HEADER_SIZE +
			    sizeof(ifidx)) {
				memcpy(&ifidx, imsg.data, sizeof(ifidx));
				dvmrpe_iface_ctl(c, ifidx);
				imsg_compose_event(&c->iev, IMSG_CTL_END, 0,
				    0, -1, NULL, 0);
			}
			break;
		case IMSG_CTL_SHOW_IGMP:
			if (imsg.hdr.len == IMSG_HEADER_SIZE +
			    sizeof(ifidx)) {
				memcpy(&ifidx, imsg.data, sizeof(ifidx));
				dvmrpe_iface_igmp_ctl(c, ifidx);
				imsg_compose_event(&c->iev, IMSG_CTL_END, 0,
				    0, -1, NULL, 0);
			}
			break;
		case IMSG_CTL_SHOW_NBR:
			dvmrpe_nbr_ctl(c);
			break;
		case IMSG_CTL_SHOW_RIB:
		case IMSG_CTL_SHOW_MFC:
		case IMSG_CTL_SHOW_SUM:
			c->iev.ibuf.pid = imsg.hdr.pid;
			dvmrpe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			break;
		case IMSG_CTL_LOG_VERBOSE:
			if (imsg.hdr.len != IMSG_HEADER_SIZE +
			    sizeof(verbose))
				break;

			/* forward to other processes */
			dvmrpe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			dvmrpe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);

			memcpy(&verbose, imsg.data, sizeof(verbose));
			log_verbose(verbose);
			break;
		default:
			log_debug("control_dispatch_imsg: "
			    "error handling imsg %d", imsg.hdr.type);
			break;
		}
		imsg_free(&imsg);
	}

	imsg_event_add(&c->iev);
}

int
control_imsg_relay(struct imsg *imsg)
{
	struct ctl_conn	*c;

	if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
		return (0);

	return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
	    -1, imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: control.c,v 1.23 2017/01/08 23:04:42 krw Exp $ */
2
3			/*
4			* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/types.h>
20			#include <sys/stat.h>
21			#include <sys/socket.h>
22			#include <sys/un.h>
23			#include <errno.h>
24			#include <fcntl.h>
25			#include <stdlib.h>
26			#include <string.h>
27			#include <unistd.h>
28
29			#include "igmp.h"
30			#include "dvmrpd.h"
31			#include "dvmrp.h"
32			#include "dvmrpe.h"
33			#include "log.h"
34			#include "control.h"
35
36			#define CONTROL_BACKLOG 5
37
38			struct ctl_conn *control_connbyfd(int);
39			struct ctl_conn *control_connbypid(pid_t);
40			void control_close(int);
41
42			int
43			control_init(void)
44			{
45			struct sockaddr_un sun;
46			int fd;
47			mode_t old_umask;
48
49			if ((fd = socket(AF_UNIX, SOCK_STREAM \| SOCK_CLOEXEC \| SOCK_NONBLOCK,
50			0)) == -1) {
51			log_warn("control_init: socket");
52			return (-1);
53			}
54
55			memset(&sun, 0, sizeof(sun));
56			sun.sun_family = AF_UNIX;
57			strlcpy(sun.sun_path, DVMRPD_SOCKET, sizeof(sun.sun_path));
58
59			if (unlink(DVMRPD_SOCKET) == -1)
60			if (errno != ENOENT) {
61			log_warn("control_init: unlink %s", DVMRPD_SOCKET);
62			close(fd);
63			return (-1);
64			}
65
66			old_umask = umask(S_IXUSR\|S_IXGRP\|S_IWOTH\|S_IROTH\|S_IXOTH);
67			if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
68			log_warn("control_init: bind: %s", DVMRPD_SOCKET);
69			close(fd);
70			umask(old_umask);
71			return (-1);
72			}
73			umask(old_umask);
74
75			if (chmod(DVMRPD_SOCKET, S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IWGRP) == -1) {
76			log_warn("control_init: chmod");
77			close(fd);
78			(void)unlink(DVMRPD_SOCKET);
79			return (-1);
80			}
81
82			control_state.fd = fd;
83
84			return (0);
85			}
86
87			int
88			control_listen(void)
89			{
90
91			if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
92			log_warn("control_listen: listen");
93			return (-1);
94			}
95
96			event_set(&control_state.ev, control_state.fd, EV_READ,
97			control_accept, NULL);
98			event_add(&control_state.ev, NULL);
99			evtimer_set(&control_state.evt, control_accept, NULL);
100
101			return (0);
102			}
103
104			void
105			control_cleanup(void)
106			{
107			event_del(&control_state.ev);
108			event_del(&control_state.evt);
109			unlink(DVMRPD_SOCKET);
110			}
111
112			/* ARGSUSED */
113			void
114			control_accept(int listenfd, short event, void *bula)
115			{
116			int connfd;
117			socklen_t len;
118			struct sockaddr_un sun;
119			struct ctl_conn *c;
120
121			event_add(&control_state.ev, NULL);
122			if ((event & EV_TIMEOUT))
123			return;
124
125			len = sizeof(sun);
126			if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
127			SOCK_NONBLOCK \| SOCK_CLOEXEC)) == -1) {
128			/*
129			* Pause accept if we are out of file descriptors, or
130			* libevent will haunt us here too.
131			*/
132			if (errno == ENFILE \|\| errno == EMFILE) {
133			struct timeval evtpause = { 1, 0 };
134
135			event_del(&control_state.ev);
136			evtimer_add(&control_state.evt, &evtpause);
137			} else if (errno != EWOULDBLOCK && errno != EINTR &&
138			errno != ECONNABORTED)
139			log_warn("control_accept: accept");
140			return;
141			}
142
143			if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
144			log_warn("control_accept");
145			close(connfd);
146			return;
147			}
148
149			imsg_init(&c->iev.ibuf, connfd);
150			c->iev.handler = control_dispatch_imsg;
151			c->iev.events = EV_READ;
152			event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
153			c->iev.handler, &c->iev);
154			event_add(&c->iev.ev, NULL);
155
156			TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
157			}
158
159			struct ctl_conn *
160			control_connbyfd(int fd)
161			{
162			struct ctl_conn *c;
163
164			TAILQ_FOREACH(c, &ctl_conns, entry) {
165			if (c->iev.ibuf.fd == fd)
166			break;
167			}
168
169			return (c);
170			}
171
172			struct ctl_conn *
173			control_connbypid(pid_t pid)
174			{
175			struct ctl_conn *c;
176
177			TAILQ_FOREACH(c, &ctl_conns, entry) {
178			if (c->iev.ibuf.pid == pid)
179			break;
180			}
181
182			return (c);
183			}
184
185			void
186			control_close(int fd)
187			{
188			struct ctl_conn *c;
189
190			if ((c = control_connbyfd(fd)) == NULL) {
191			log_warn("control_close: fd %d: not found", fd);
192			return;
193			}
194
195			msgbuf_clear(&c->iev.ibuf.w);
196			TAILQ_REMOVE(&ctl_conns, c, entry);
197
198			event_del(&c->iev.ev);
199			close(c->iev.ibuf.fd);
200
201			/* Some file descriptors are available again. */
202			if (evtimer_pending(&control_state.evt, NULL)) {
203			evtimer_del(&control_state.evt);
204			event_add(&control_state.ev, NULL);
205			}
206
207			free(c);
208			}
209
210			/* ARGSUSED */
211			void
212			control_dispatch_imsg(int fd, short event, void *bula)
213			{
214			struct ctl_conn *c;
215			struct imsg imsg;
216			int n;
217			unsigned int ifidx;
218			int verbose;
219
220			if ((c = control_connbyfd(fd)) == NULL) {
221			log_warn("control_dispatch_imsg: fd %d: not found", fd);
222			return;
223			}
224
225			if (event & EV_READ) {
226			if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) \|\|
227			n == 0) {
228			control_close(fd);
229			return;
230			}
231			}
232			if (event & EV_WRITE) {
233			if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
234			control_close(fd);
235			return;
236			}
237			}
238
239			for (;;) {
240			if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
241			control_close(fd);
242			return;
243			}
244
245			if (n == 0)
246			break;
247
248			switch (imsg.hdr.type) {
249			case IMSG_CTL_MFC_COUPLE:
250			case IMSG_CTL_MFC_DECOUPLE:
251			case IMSG_CTL_RELOAD:
252			dvmrpe_imsg_compose_parent(imsg.hdr.type, 0, NULL, 0);
253			break;
254			case IMSG_CTL_SHOW_IFACE:
255			if (imsg.hdr.len == IMSG_HEADER_SIZE +
256			sizeof(ifidx)) {
257			memcpy(&ifidx, imsg.data, sizeof(ifidx));
258			dvmrpe_iface_ctl(c, ifidx);
259			imsg_compose_event(&c->iev, IMSG_CTL_END, 0,
260			0, -1, NULL, 0);
261			}
262			break;
263			case IMSG_CTL_SHOW_IGMP:
264			if (imsg.hdr.len == IMSG_HEADER_SIZE +
265			sizeof(ifidx)) {
266			memcpy(&ifidx, imsg.data, sizeof(ifidx));
267			dvmrpe_iface_igmp_ctl(c, ifidx);
268			imsg_compose_event(&c->iev, IMSG_CTL_END, 0,
269			0, -1, NULL, 0);
270			}
271			break;
272			case IMSG_CTL_SHOW_NBR:
273			dvmrpe_nbr_ctl(c);
274			break;
275			case IMSG_CTL_SHOW_RIB:
276			case IMSG_CTL_SHOW_MFC:
277			case IMSG_CTL_SHOW_SUM:
278			c->iev.ibuf.pid = imsg.hdr.pid;
279			dvmrpe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
280			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
281			break;
282			case IMSG_CTL_LOG_VERBOSE:
283			if (imsg.hdr.len != IMSG_HEADER_SIZE +
284			sizeof(verbose))
285			break;
286
287			/* forward to other processes */
288			dvmrpe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
289			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
290			dvmrpe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
291			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
292
293			memcpy(&verbose, imsg.data, sizeof(verbose));
294			log_verbose(verbose);
295			break;
296			default:
297			log_debug("control_dispatch_imsg: "
298			"error handling imsg %d", imsg.hdr.type);
299			break;
300			}
301			imsg_free(&imsg);
302			}
303
304			imsg_event_add(&c->iev);
305			}
306
307			int
308			control_imsg_relay(struct imsg *imsg)
309			{
310			struct ctl_conn *c;
311
312			if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
313			return (0);
314
315			return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
316			-1, imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE));
317			}