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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/ripd/control.c	Lines:	0	136	0.0 %
Date:	2017-11-13	Branches:	0	79	0.0 %


/*	$OpenBSD: control.c,v 1.25 2017/01/17 22:10:56 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 "ripd.h"
#include "rip.h"
#include "ripe.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(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("control_init: socket");
		return (-1);
	}

	bzero(&sun, 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("control_init: unlink %s", 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("control_init: bind: %s", 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("control_init: chmod");
		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("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(char *path)
{
	event_del(&control_state.ev);
	event_del(&control_state.evt);
	unlink(path);
}

/* 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_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("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;
	ssize_t		 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_SHOW_INTERFACE:
			if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(ifidx))
				return;

			memcpy(&ifidx, imsg.data, sizeof(ifidx));
			ripe_iface_ctl(c, ifidx);
			imsg_compose(&c->iev.ibuf, IMSG_CTL_END, 0, 0,
			    -1, NULL, 0);

			break;
		case IMSG_CTL_SHOW_RIB:
			c->iev.ibuf.pid = imsg.hdr.pid;
			ripe_imsg_compose_rde(imsg.hdr.type, 0,
			    imsg.hdr.pid, imsg.data, imsg.hdr.len -
			    IMSG_HEADER_SIZE);
			break;
		case IMSG_CTL_SHOW_NBR:
			ripe_nbr_ctl(c);
			break;
		case IMSG_CTL_KROUTE_ADDR:
		case IMSG_CTL_KROUTE:
		case IMSG_CTL_IFINFO:
			c->iev.ibuf.pid = imsg.hdr.pid;
			ripe_imsg_compose_parent(imsg.hdr.type,
			    imsg.hdr.pid, imsg.data,
			    imsg.hdr.len - IMSG_HEADER_SIZE);
			break;
		case IMSG_CTL_FIB_COUPLE:
		case IMSG_CTL_FIB_DECOUPLE:
		case IMSG_CTL_RELOAD:
			c->iev.ibuf.pid = imsg.hdr.pid;
			ripe_imsg_compose_parent(imsg.hdr.type, 0, NULL, 0);
			break;
		case IMSG_CTL_LOG_VERBOSE:
			if (imsg.hdr.len != IMSG_HEADER_SIZE +
			    sizeof(verbose))
				break;

			/* forward to other processes */
			ripe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			ripe_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 1.25 2017/01/17 22:10:56 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 "ripd.h"
30			#include "rip.h"
31			#include "ripe.h"
32			#include "log.h"
33			#include "control.h"
34
35			#define CONTROL_BACKLOG 5
36
37			struct ctl_conn *control_connbyfd(int);
38			struct ctl_conn *control_connbypid(pid_t);
39			void control_close(int);
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("control_init: socket");
51			return (-1);
52			}
53
54			bzero(&sun, 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("control_init: unlink %s", 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("control_init: bind: %s", 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("control_init: chmod");
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("control_listen: listen");
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			event_del(&control_state.ev);
107			event_del(&control_state.evt);
108			unlink(path);
109			}
110
111			/* ARGSUSED */
112			void
113			control_accept(int listenfd, short event, void *bula)
114			{
115			int connfd;
116			socklen_t len;
117			struct sockaddr_un sun;
118			struct ctl_conn *c;
119
120			event_add(&control_state.ev, NULL);
121			if ((event & EV_TIMEOUT))
122			return;
123
124			len = sizeof(sun);
125			if ((connfd = accept4(listenfd, (struct sockaddr *)&sun, &len,
126			SOCK_CLOEXEC \| SOCK_NONBLOCK)) == -1) {
127			/*
128			* Pause accept if we are out of file descriptors, or
129			* libevent will haunt us here too.
130			*/
131			if (errno == ENFILE \|\| errno == EMFILE) {
132			struct timeval evtpause = { 1, 0 };
133
134			event_del(&control_state.ev);
135			evtimer_add(&control_state.evt, &evtpause);
136			} else if (errno != EWOULDBLOCK && errno != EINTR &&
137			errno != ECONNABORTED)
138			log_warn("control_accept: accept");
139			return;
140			}
141
142			if ((c = calloc(1, sizeof(struct ctl_conn))) == NULL) {
143			log_warn("control_accept");
144			close(connfd);
145			return;
146			}
147
148			imsg_init(&c->iev.ibuf, connfd);
149			c->iev.handler = control_dispatch_imsg;
150			c->iev.events = EV_READ;
151			event_set(&c->iev.ev, c->iev.ibuf.fd, c->iev.events,
152			c->iev.handler, &c->iev);
153			event_add(&c->iev.ev, NULL);
154
155			TAILQ_INSERT_TAIL(&ctl_conns, c, entry);
156			}
157
158			struct ctl_conn *
159			control_connbyfd(int fd)
160			{
161			struct ctl_conn *c;
162
163			TAILQ_FOREACH(c, &ctl_conns, entry) {
164			if (c->iev.ibuf.fd == fd)
165			break;
166			}
167
168			return (c);
169			}
170
171			struct ctl_conn *
172			control_connbypid(pid_t pid)
173			{
174			struct ctl_conn *c;
175
176			TAILQ_FOREACH(c, &ctl_conns, entry) {
177			if (c->iev.ibuf.pid == pid)
178			break;
179			}
180
181			return (c);
182			}
183
184			void
185			control_close(int fd)
186			{
187			struct ctl_conn *c;
188
189			if ((c = control_connbyfd(fd)) == NULL) {
190			log_warn("control_close: fd %d: not found", fd);
191			return;
192			}
193
194			msgbuf_clear(&c->iev.ibuf.w);
195			TAILQ_REMOVE(&ctl_conns, c, entry);
196
197			event_del(&c->iev.ev);
198			close(c->iev.ibuf.fd);
199
200			/* Some file descriptors are available again. */
201			if (evtimer_pending(&control_state.evt, NULL)) {
202			evtimer_del(&control_state.evt);
203			event_add(&control_state.ev, NULL);
204			}
205
206			free(c);
207			}
208
209			/* ARGSUSED */
210			void
211			control_dispatch_imsg(int fd, short event, void *bula)
212			{
213			struct ctl_conn *c;
214			struct imsg imsg;
215			ssize_t n;
216			unsigned int ifidx;
217			int verbose;
218
219			if ((c = control_connbyfd(fd)) == NULL) {
220			log_warn("control_dispatch_imsg: fd %d: not found", fd);
221			return;
222			}
223
224			if (event & EV_READ) {
225			if (((n = imsg_read(&c->iev.ibuf)) == -1 && errno != EAGAIN) \|\|
226			n == 0) {
227			control_close(fd);
228			return;
229			}
230			}
231			if (event & EV_WRITE) {
232			if (msgbuf_write(&c->iev.ibuf.w) <= 0 && errno != EAGAIN) {
233			control_close(fd);
234			return;
235			}
236			}
237
238			for (;;) {
239			if ((n = imsg_get(&c->iev.ibuf, &imsg)) == -1) {
240			control_close(fd);
241			return;
242			}
243
244			if (n == 0)
245			break;
246
247			switch (imsg.hdr.type) {
248			case IMSG_CTL_SHOW_INTERFACE:
249			if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(ifidx))
250			return;
251
252			memcpy(&ifidx, imsg.data, sizeof(ifidx));
253			ripe_iface_ctl(c, ifidx);
254			imsg_compose(&c->iev.ibuf, IMSG_CTL_END, 0, 0,
255			-1, NULL, 0);
256
257			break;
258			case IMSG_CTL_SHOW_RIB:
259			c->iev.ibuf.pid = imsg.hdr.pid;
260			ripe_imsg_compose_rde(imsg.hdr.type, 0,
261			imsg.hdr.pid, imsg.data, imsg.hdr.len -
262			IMSG_HEADER_SIZE);
263			break;
264			case IMSG_CTL_SHOW_NBR:
265			ripe_nbr_ctl(c);
266			break;
267			case IMSG_CTL_KROUTE_ADDR:
268			case IMSG_CTL_KROUTE:
269			case IMSG_CTL_IFINFO:
270			c->iev.ibuf.pid = imsg.hdr.pid;
271			ripe_imsg_compose_parent(imsg.hdr.type,
272			imsg.hdr.pid, imsg.data,
273			imsg.hdr.len - IMSG_HEADER_SIZE);
274			break;
275			case IMSG_CTL_FIB_COUPLE:
276			case IMSG_CTL_FIB_DECOUPLE:
277			case IMSG_CTL_RELOAD:
278			c->iev.ibuf.pid = imsg.hdr.pid;
279			ripe_imsg_compose_parent(imsg.hdr.type, 0, NULL, 0);
280			break;
281			case IMSG_CTL_LOG_VERBOSE:
282			if (imsg.hdr.len != IMSG_HEADER_SIZE +
283			sizeof(verbose))
284			break;
285
286			/* forward to other processes */
287			ripe_imsg_compose_parent(imsg.hdr.type, imsg.hdr.pid,
288			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
289			ripe_imsg_compose_rde(imsg.hdr.type, 0, imsg.hdr.pid,
290			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
291
292			memcpy(&verbose, imsg.data, sizeof(verbose));
293			log_verbose(verbose);
294			break;
295			default:
296			log_debug("control_dispatch_imsg: "
297			"error handling imsg %d", imsg.hdr.type);
298			break;
299			}
300			imsg_free(&imsg);
301			}
302
303			imsg_event_add(&c->iev);
304			}
305
306			int
307			control_imsg_relay(struct imsg *imsg)
308			{
309			struct ctl_conn *c;
310
311			if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
312			return (0);
313
314			return (imsg_compose_event(&c->iev, imsg->hdr.type, 0, imsg->hdr.pid,
315			-1, imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE));
316			}