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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/eigrpd/control.c	Lines:	0	141	0.0 %
Date:	2017-11-07	Branches:	0	86	0.0 %


/*	$OpenBSD: control.c,v 1.7 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/un.h>

#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "eigrpd.h"
#include "eigrpe.h"
#include "control.h"
#include "log.h"

#define	CONTROL_BACKLOG	5

static void		 control_accept(int, short, void *);
static struct ctl_conn	*control_connbyfd(int);
static struct ctl_conn	*control_connbypid(pid_t);
static void		 control_close(int);
static void		 control_dispatch_imsg(int, short, void *);

int
control_init(char *path)
{
	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("%s: socket", __func__);
		return (-1);
	}

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

	if (unlink(path) == -1)
		if (errno != ENOENT) {
			log_warn("%s: unlink %s", __func__, path);
			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("%s: bind: %s", __func__, path);
		close(fd);
		umask(old_umask);
		return (-1);
	}
	umask(old_umask);

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

	control_state.fd = fd;

	return (0);
}

int
control_listen(void)
{

	if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
		log_warn("%s: listen", __func__);
		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(char *path)
{
	if (path == NULL)
		return;
	event_del(&control_state.ev);
	event_del(&control_state.evt);
	unlink(path);
}

/* ARGSUSED */
static 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_CLOEXEC | SOCK_NONBLOCK)) == -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("%s: accept4", __func__);
		return;
	}

	if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
		log_warn("%s: calloc", __func__);
		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);
}

static 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);
}

static 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);
}

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

	if ((c = control_connbyfd(fd)) == NULL) {
		log_warnx("%s: fd %d: not found", __func__, 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 */
static void
control_dispatch_imsg(int fd, short event, void *bula)
{
	struct ctl_conn	*c;
	struct imsg	 imsg;
	ssize_t		 n;
	unsigned int	 ifidx;
	int		 verbose;

	if ((c = control_connbyfd(fd)) == NULL) {
		log_warnx("%s: fd %d: not found", __func__, 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_FIB_COUPLE:
		case IMSG_CTL_FIB_DECOUPLE:
		case IMSG_CTL_RELOAD:
			c->iev.ibuf.pid = imsg.hdr.pid;
			eigrpe_imsg_compose_parent(imsg.hdr.type, 0, NULL, 0);
			break;
		case IMSG_CTL_KROUTE:
		case IMSG_CTL_IFINFO:
			c->iev.ibuf.pid = imsg.hdr.pid;
			eigrpe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			break;
		case IMSG_CTL_SHOW_INTERFACE:
			if (imsg.hdr.len != IMSG_HEADER_SIZE +
			    sizeof(ifidx))
				break;

			memcpy(&ifidx, imsg.data, sizeof(ifidx));
			eigrpe_iface_ctl(c, ifidx);
			imsg_compose_event(&c->iev, IMSG_CTL_END, 0,
			    0, -1, NULL, 0);
			break;
		case IMSG_CTL_SHOW_TOPOLOGY:
			if (imsg.hdr.len != IMSG_HEADER_SIZE +
			    sizeof(struct ctl_show_topology_req))
				break;

			c->iev.ibuf.pid = imsg.hdr.pid;
			eigrpe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			break;
		case IMSG_CTL_SHOW_NBR:
			eigrpe_nbr_ctl(c);
			break;
		case IMSG_CTL_SHOW_STATS:
			eigrpe_stats_ctl(c);
			break;
		case IMSG_CTL_CLEAR_NBR:
			if (imsg.hdr.len != IMSG_HEADER_SIZE +
			    sizeof(struct ctl_nbr))
				break;

			nbr_clear_ctl(imsg.data);
			break;
		case IMSG_CTL_LOG_VERBOSE:
			if (imsg.hdr.len != IMSG_HEADER_SIZE +
			    sizeof(verbose))
				break;

			/* forward to other processes */
			eigrpe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			eigrpe_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("%s: error handling imsg %d", __func__,
			    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 1.7 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/un.h>
22
23			#include <errno.h>
24			#include <stdlib.h>
25			#include <string.h>
26			#include <unistd.h>
27
28			#include "eigrpd.h"
29			#include "eigrpe.h"
30			#include "control.h"
31			#include "log.h"
32
33			#define CONTROL_BACKLOG 5
34
35			static void control_accept(int, short, void *);
36			static struct ctl_conn *control_connbyfd(int);
37			static struct ctl_conn *control_connbypid(pid_t);
38			static void control_close(int);
39			static void control_dispatch_imsg(int, short, void *);
40
41			int
42			control_init(char *path)
43			{
44			struct sockaddr_un sun;
45			int fd;
46			mode_t old_umask;
47
48			if ((fd = socket(AF_UNIX, SOCK_STREAM \| SOCK_CLOEXEC \| SOCK_NONBLOCK,
49			0)) == -1) {
50			log_warn("%s: socket", __func__);
51			return (-1);
52			}
53
54			memset(&sun, 0, sizeof(sun));
55			sun.sun_family = AF_UNIX;
56			strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
57
58			if (unlink(path) == -1)
59			if (errno != ENOENT) {
60			log_warn("%s: unlink %s", __func__, path);
61			close(fd);
62			return (-1);
63			}
64
65			old_umask = umask(S_IXUSR\|S_IXGRP\|S_IWOTH\|S_IROTH\|S_IXOTH);
66			if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
67			log_warn("%s: bind: %s", __func__, path);
68			close(fd);
69			umask(old_umask);
70			return (-1);
71			}
72			umask(old_umask);
73
74			if (chmod(path, S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IWGRP) == -1) {
75			log_warn("%s: chmod", __func__);
76			close(fd);
77			(void)unlink(path);
78			return (-1);
79			}
80
81			control_state.fd = fd;
82
83			return (0);
84			}
85
86			int
87			control_listen(void)
88			{
89
90			if (listen(control_state.fd, CONTROL_BACKLOG) == -1) {
91			log_warn("%s: listen", __func__);
92			return (-1);
93			}
94
95			event_set(&control_state.ev, control_state.fd, EV_READ,
96			control_accept, NULL);
97			event_add(&control_state.ev, NULL);
98			evtimer_set(&control_state.evt, control_accept, NULL);
99
100			return (0);
101			}
102
103			void
104			control_cleanup(char *path)
105			{
106			if (path == NULL)
107			return;
108			event_del(&control_state.ev);
109			event_del(&control_state.evt);
110			unlink(path);
111			}
112
113			/* ARGSUSED */
114			static void
115			control_accept(int listenfd, short event, void *bula)
116			{
117			int connfd;
118			socklen_t len;
119			struct sockaddr_un sun;
120			struct ctl_conn *c;
121
122			event_add(&control_state.ev, NULL);
123			if ((event & EV_TIMEOUT))
124			return;
125
126			len = sizeof(sun);
127			if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
128			SOCK_CLOEXEC \| SOCK_NONBLOCK)) == -1) {
129			/*
130			* Pause accept if we are out of file descriptors, or
131			* libevent will haunt us here too.
132			*/
133			if (errno == ENFILE \|\| errno == EMFILE) {
134			struct timeval evtpause = { 1, 0 };
135
136			event_del(&control_state.ev);
137			evtimer_add(&control_state.evt, &evtpause);
138			} else if (errno != EWOULDBLOCK && errno != EINTR &&
139			errno != ECONNABORTED)
140			log_warn("%s: accept4", __func__);
141			return;
142			}
143
144			if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
145			log_warn("%s: calloc", __func__);
146			close(connfd);
147			return;
148			}
149
150			imsg_init(&c->iev.ibuf, connfd);
151			c->iev.handler = control_dispatch_imsg;
152			c->iev.events = EV_READ;
153			event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
154			c->iev.handler, &c->iev);
155			event_add(&c->iev.ev, NULL);
156
157			TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
158			}
159
160			static struct ctl_conn *
161			control_connbyfd(int fd)
162			{
163			struct ctl_conn *c;
164
165			TAILQ_FOREACH(c, &ctl_conns, entry) {
166			if (c->iev.ibuf.fd == fd)
167			break;
168			}
169
170			return (c);
171			}
172
173			static struct ctl_conn *
174			control_connbypid(pid_t pid)
175			{
176			struct ctl_conn *c;
177
178			TAILQ_FOREACH(c, &ctl_conns, entry) {
179			if (c->iev.ibuf.pid == pid)
180			break;
181			}
182
183			return (c);
184			}
185
186			static void
187			control_close(int fd)
188			{
189			struct ctl_conn *c;
190
191			if ((c = control_connbyfd(fd)) == NULL) {
192			log_warnx("%s: fd %d: not found", __func__, fd);
193			return;
194			}
195
196			msgbuf_clear(&c->iev.ibuf.w);
197			TAILQ_REMOVE(&ctl_conns, c, entry);
198
199			event_del(&c->iev.ev);
200			close(c->iev.ibuf.fd);
201
202			/* Some file descriptors are available again. */
203			if (evtimer_pending(&control_state.evt, NULL)) {
204			evtimer_del(&control_state.evt);
205			event_add(&control_state.ev, NULL);
206			}
207
208			free(c);
209			}
210
211			/* ARGSUSED */
212			static void
213			control_dispatch_imsg(int fd, short event, void *bula)
214			{
215			struct ctl_conn *c;
216			struct imsg imsg;
217			ssize_t n;
218			unsigned int ifidx;
219			int verbose;
220
221			if ((c = control_connbyfd(fd)) == NULL) {
222			log_warnx("%s: fd %d: not found", __func__, fd);
223			return;
224			}
225
226			if (event & EV_READ) {
227			if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) \|\|
228			n == 0) {
229			control_close(fd);
230			return;
231			}
232			}
233			if (event & EV_WRITE) {
234			if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
235			control_close(fd);
236			return;
237			}
238			}
239
240			for (;;) {
241			if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
242			control_close(fd);
243			return;
244			}
245
246			if (n == 0)
247			break;
248
249			switch (imsg.hdr.type) {
250			case IMSG_CTL_FIB_COUPLE:
251			case IMSG_CTL_FIB_DECOUPLE:
252			case IMSG_CTL_RELOAD:
253			c->iev.ibuf.pid = imsg.hdr.pid;
254			eigrpe_imsg_compose_parent(imsg.hdr.type, 0, NULL, 0);
255			break;
256			case IMSG_CTL_KROUTE:
257			case IMSG_CTL_IFINFO:
258			c->iev.ibuf.pid = imsg.hdr.pid;
259			eigrpe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
260			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
261			break;
262			case IMSG_CTL_SHOW_INTERFACE:
263			if (imsg.hdr.len != IMSG_HEADER_SIZE +
264			sizeof(ifidx))
265			break;
266
267			memcpy(&ifidx, imsg.data, sizeof(ifidx));
268			eigrpe_iface_ctl(c, ifidx);
269			imsg_compose_event(&c->iev, IMSG_CTL_END, 0,
270			0, -1, NULL, 0);
271			break;
272			case IMSG_CTL_SHOW_TOPOLOGY:
273			if (imsg.hdr.len != IMSG_HEADER_SIZE +
274			sizeof(struct ctl_show_topology_req))
275			break;
276
277			c->iev.ibuf.pid = imsg.hdr.pid;
278			eigrpe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
279			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
280			break;
281			case IMSG_CTL_SHOW_NBR:
282			eigrpe_nbr_ctl(c);
283			break;
284			case IMSG_CTL_SHOW_STATS:
285			eigrpe_stats_ctl(c);
286			break;
287			case IMSG_CTL_CLEAR_NBR:
288			if (imsg.hdr.len != IMSG_HEADER_SIZE +
289			sizeof(struct ctl_nbr))
290			break;
291
292			nbr_clear_ctl(imsg.data);
293			break;
294			case IMSG_CTL_LOG_VERBOSE:
295			if (imsg.hdr.len != IMSG_HEADER_SIZE +
296			sizeof(verbose))
297			break;
298
299			/* forward to other processes */
300			eigrpe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
301			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
302			eigrpe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
303			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
304
305			memcpy(&verbose, imsg.data, sizeof(verbose));
306			log_verbose(verbose);
307			break;
308			default:
309			log_debug("%s: error handling imsg %d", __func__,
310			imsg.hdr.type);
311			break;
312			}
313			imsg_free(&imsg);
314			}
315
316			imsg_event_add(&c->iev);
317			}
318
319			int
320			control_imsg_relay(struct imsg *imsg)
321			{
322			struct ctl_conn *c;
323
324			if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
325			return (0);
326
327			return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
328			-1, imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE));
329			}