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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/bgpd/control.c	Lines:	0	213	0.0 %
Date:	2016-12-06	Branches:	0	145	0.0 %


/*	$OpenBSD: control.c,v 1.82 2015/12/05 18:28:04 benno 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 <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "bgpd.h"
#include "session.h"

#define	CONTROL_BACKLOG	5

struct ctl_conn	*control_connbyfd(int);
struct ctl_conn	*control_connbypid(pid_t);
int		 control_close(int);
void		 control_result(struct ctl_conn *, u_int);
ssize_t		 imsg_read_nofd(struct imsgbuf *);

int
control_init(int restricted, char *path)
{
	struct sockaddr_un	 sun;
	int			 fd;
	mode_t			 old_umask, mode;

	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;
	if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=
	    sizeof(sun.sun_path)) {
		log_warn("control_init: socket name too long");
		close(fd);
		return (-1);
	}

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

	if (restricted) {
		old_umask = umask(S_IXUSR|S_IXGRP|S_IXOTH);
		mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
	} else {
		old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
		mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
	}

	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, mode) == -1) {
		log_warn("control_init: chmod: %s", path);
		close(fd);
		unlink(path);
		return (-1);
	}

	return (fd);
}

int
control_listen(int fd)
{
	if (fd != -1 && listen(fd, CONTROL_BACKLOG) == -1) {
		log_warn("control_listen: listen");
		return (-1);
	}

	return (0);
}

void
control_shutdown(int fd)
{
	close(fd);
}

void
control_cleanup(const char *path)
{
	if (path)
		unlink(path);
}

unsigned int
control_accept(int listenfd, int restricted)
{
	int			 connfd;
	socklen_t		 len;
	struct sockaddr_un	 sun;
	struct ctl_conn		*ctl_conn;

	len = sizeof(sun);
	if ((connfd = accept4(listenfd,
	    (struct sockaddr *)&sun, &len,
	    SOCK_NONBLOCK | SOCK_CLOEXEC)) == -1) {
		if (errno == ENFILE || errno == EMFILE) {
			pauseaccept = getmonotime();
			return (0);
		} else if (errno != EWOULDBLOCK && errno != EINTR &&
		    errno != ECONNABORTED)
			log_warn("control_accept: accept");
		return (0);
	}

	if ((ctl_conn = calloc(1, sizeof(struct ctl_conn))) == NULL) {
		log_warn("control_accept");
		close(connfd);
		return (0);
	}

	imsg_init(&ctl_conn->ibuf, connfd);
	ctl_conn->restricted = restricted;

	TAILQ_INSERT_TAIL(&ctl_conns, ctl_conn, entry);

	return (1);
}

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

	for (c = TAILQ_FIRST(&ctl_conns); c != NULL && c->ibuf.fd != fd;
	    c = TAILQ_NEXT(c, entry))
		;	/* nothing */

	return (c);
}

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

	for (c = TAILQ_FIRST(&ctl_conns); c != NULL && c->ibuf.pid != pid;
	    c = TAILQ_NEXT(c, entry))
		;	/* nothing */

	return (c);
}

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

	if ((c = control_connbyfd(fd)) == NULL) {
		log_warn("control_close: fd %d: not found", fd);
		return (0);
	}

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

	close(c->ibuf.fd);
	free(c);
	pauseaccept = 0;
	return (1);
}

int
control_dispatch_msg(struct pollfd *pfd, u_int *ctl_cnt)
{
	struct imsg		 imsg;
	struct ctl_conn		*c;
	ssize_t			 n;
	int			 verbose;
	struct peer		*p;
	struct ctl_neighbor	*neighbor;
	struct ctl_show_rib_request	*ribreq;

	if ((c = control_connbyfd(pfd->fd)) == NULL) {
		log_warn("control_dispatch_msg: fd %d: not found", pfd->fd);
		return (0);
	}

	if (pfd->revents & POLLOUT)
		if (msgbuf_write(&c->ibuf.w) <= 0 && errno != EAGAIN) {
			*ctl_cnt -= control_close(pfd->fd);
			return (1);
		}

	if (!(pfd->revents & POLLIN))
		return (0);

	if (((n = imsg_read_nofd(&c->ibuf)) == -1 && errno != EAGAIN) ||
	    n == 0) {
		*ctl_cnt -= control_close(pfd->fd);
		return (1);
	}

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

		if (n == 0)
			break;

		if (c->restricted) {
			switch (imsg.hdr.type) {
			case IMSG_CTL_SHOW_NEIGHBOR:
			case IMSG_CTL_SHOW_NEXTHOP:
			case IMSG_CTL_SHOW_INTERFACE:
			case IMSG_CTL_SHOW_RIB:
			case IMSG_CTL_SHOW_RIB_AS:
			case IMSG_CTL_SHOW_RIB_PREFIX:
			case IMSG_CTL_SHOW_RIB_MEM:
			case IMSG_CTL_SHOW_RIB_COMMUNITY:
			case IMSG_CTL_SHOW_NETWORK:
			case IMSG_CTL_SHOW_TERSE:
			case IMSG_CTL_SHOW_TIMER:
				break;
			default:
				/* clear imsg type to prevent processing */
				imsg.hdr.type = IMSG_NONE;
				control_result(c, CTL_RES_DENIED);
				break;
			}
		}

		switch (imsg.hdr.type) {
		case IMSG_NONE:
			/* message was filtered out, nothing to do */
			break;
		case IMSG_CTL_SHOW_NEIGHBOR:
			c->ibuf.pid = imsg.hdr.pid;
			if (imsg.hdr.len == IMSG_HEADER_SIZE +
			    sizeof(struct ctl_neighbor)) {
				neighbor = imsg.data;
				p = getpeerbyaddr(&neighbor->addr);
				if (p == NULL)
					p = getpeerbydesc(neighbor->descr);
				if (p == NULL) {
					control_result(c, CTL_RES_NOSUCHPEER);
					break;
				}
				if (!neighbor->show_timers) {
					imsg_ctl_rde(imsg.hdr.type,
					    imsg.hdr.pid,
					    p, sizeof(struct peer));
					imsg_ctl_rde(IMSG_CTL_END,
					    imsg.hdr.pid, NULL, 0);
				} else {
					u_int			 i;
					time_t			 d;
					struct ctl_timer	 ct;

					imsg_compose(&c->ibuf,
					    IMSG_CTL_SHOW_NEIGHBOR,
					    0, 0, -1, p, sizeof(*p));
					for (i = 1; i < Timer_Max; i++) {
						if (!timer_running(p, i, &d))
							continue;
						ct.type = i;
						ct.val = d;
						imsg_compose(&c->ibuf,
						    IMSG_CTL_SHOW_TIMER,
						    0, 0, -1, &ct, sizeof(ct));
					}
					imsg_compose(&c->ibuf, IMSG_CTL_END,
					    0, 0, -1, NULL, 0);
				}
			} else {
				for (p = peers; p != NULL; p = p->next)
					imsg_ctl_rde(imsg.hdr.type,
					    imsg.hdr.pid,
					    p, sizeof(struct peer));
				imsg_ctl_rde(IMSG_CTL_END, imsg.hdr.pid,
					NULL, 0);
			}
			break;
		case IMSG_CTL_SHOW_TERSE:
			for (p = peers; p != NULL; p = p->next)
				imsg_compose(&c->ibuf, IMSG_CTL_SHOW_NEIGHBOR,
				    0, 0, -1, p, sizeof(struct peer));
			imsg_compose(&c->ibuf, IMSG_CTL_END, 0, 0, -1, NULL, 0);
			break;
		case IMSG_CTL_FIB_COUPLE:
		case IMSG_CTL_FIB_DECOUPLE:
			imsg_ctl_parent(imsg.hdr.type, imsg.hdr.peerid,
			    0, NULL, 0);
			break;
		case IMSG_CTL_NEIGHBOR_UP:
		case IMSG_CTL_NEIGHBOR_DOWN:
		case IMSG_CTL_NEIGHBOR_CLEAR:
		case IMSG_CTL_NEIGHBOR_RREFRESH:
		case IMSG_CTL_NEIGHBOR_DESTROY:
			if (imsg.hdr.len == IMSG_HEADER_SIZE +
			    sizeof(struct ctl_neighbor)) {
				neighbor = imsg.data;
				neighbor->descr[PEER_DESCR_LEN - 1] = 0;
				p = getpeerbyaddr(&neighbor->addr);
				if (p == NULL)
					p = getpeerbydesc(neighbor->descr);
				if (p == NULL) {
					control_result(c, CTL_RES_NOSUCHPEER);
					break;
				}
				switch (imsg.hdr.type) {
				case IMSG_CTL_NEIGHBOR_UP:
					bgp_fsm(p, EVNT_START);
					control_result(c, CTL_RES_OK);
					break;
				case IMSG_CTL_NEIGHBOR_DOWN:
					session_stop(p, ERR_CEASE_ADMIN_DOWN);
					control_result(c, CTL_RES_OK);
					break;
				case IMSG_CTL_NEIGHBOR_CLEAR:
					if (!p->conf.down) {
						session_stop(p,
						    ERR_CEASE_ADMIN_RESET);
						timer_set(p, Timer_IdleHold,
						    SESSION_CLEAR_DELAY);
					} else {
						session_stop(p,
						    ERR_CEASE_ADMIN_DOWN);
					}
					control_result(c, CTL_RES_OK);
					break;
				case IMSG_CTL_NEIGHBOR_RREFRESH:
					if (session_neighbor_rrefresh(p))
						control_result(c,
						    CTL_RES_NOCAP);
					else
						control_result(c, CTL_RES_OK);
					break;
				case IMSG_CTL_NEIGHBOR_DESTROY:
					if (!p->template)
						control_result(c,
						    CTL_RES_BADPEER);
					else if (p->state != STATE_IDLE)
						control_result(c,
						    CTL_RES_BADSTATE);
					else {
						/*
						 * Mark as deleted, will be
						 * collected on next poll loop.
						 */
						p->conf.reconf_action =
						    RECONF_DELETE;
						control_result(c, CTL_RES_OK);
					}
					break;
				default:
					fatal("king bula wants more humppa");
				}
			} else
				log_warnx("got IMSG_CTL_NEIGHBOR_ with "
				    "wrong length");
			break;
		case IMSG_CTL_RELOAD:
		case IMSG_CTL_SHOW_INTERFACE:
		case IMSG_CTL_SHOW_FIB_TABLES:
			c->ibuf.pid = imsg.hdr.pid;
			imsg_ctl_parent(imsg.hdr.type, 0, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			break;
		case IMSG_CTL_KROUTE:
		case IMSG_CTL_KROUTE_ADDR:
		case IMSG_CTL_SHOW_NEXTHOP:
			c->ibuf.pid = imsg.hdr.pid;
			imsg_ctl_parent(imsg.hdr.type, imsg.hdr.peerid,
			    imsg.hdr.pid, imsg.data, imsg.hdr.len -
			    IMSG_HEADER_SIZE);
			break;
		case IMSG_CTL_SHOW_RIB:
		case IMSG_CTL_SHOW_RIB_AS:
		case IMSG_CTL_SHOW_RIB_PREFIX:
			if (imsg.hdr.len == IMSG_HEADER_SIZE +
			    sizeof(struct ctl_show_rib_request)) {
				ribreq = imsg.data;
				neighbor = &ribreq->neighbor;
				neighbor->descr[PEER_DESCR_LEN - 1] = 0;
				ribreq->peerid = 0;
				p = NULL;
				if (neighbor->addr.aid) {
					p = getpeerbyaddr(&neighbor->addr);
					if (p == NULL) {
						control_result(c,
						    CTL_RES_NOSUCHPEER);
						break;
					}
					ribreq->peerid = p->conf.id;
				} else if (neighbor->descr[0]) {
					p = getpeerbydesc(neighbor->descr);
					if (p == NULL) {
						control_result(c,
						    CTL_RES_NOSUCHPEER);
						break;
					}
					ribreq->peerid = p->conf.id;
				}
				if ((ribreq->flags &
				     (F_CTL_ADJ_OUT | F_CTL_ADJ_IN)) && !p) {
					/*
					 * both in and out tables are only
					 * meaningful if used on a single
					 * peer.
					 */
					control_result(c, CTL_RES_NOSUCHPEER);
					break;
				}
				if ((ribreq->flags & F_CTL_ADJ_IN) && p &&
				    !p->conf.softreconfig_in) {
					/*
					 * without softreconfig_in we do not
					 * have an Adj-RIB-In table
					 */
					control_result(c, CTL_RES_NOCAP);
					break;
				}
				if ((imsg.hdr.type == IMSG_CTL_SHOW_RIB_PREFIX)
				    && (ribreq->prefix.aid == AID_UNSPEC)) {
					/* malformed request, must specify af */
					control_result(c, CTL_RES_PARSE_ERROR);
					break;
				}
				c->ibuf.pid = imsg.hdr.pid;
				imsg_ctl_rde(imsg.hdr.type, imsg.hdr.pid,
				    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			} else
				log_warnx("got IMSG_CTL_SHOW_RIB with "
				    "wrong length");
			break;
		case IMSG_CTL_SHOW_RIB_MEM:
		case IMSG_CTL_SHOW_RIB_COMMUNITY:
		case IMSG_CTL_SHOW_NETWORK:
			c->ibuf.pid = imsg.hdr.pid;
			imsg_ctl_rde(imsg.hdr.type, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			break;
		case IMSG_NETWORK_ADD:
		case IMSG_NETWORK_ASPATH:
		case IMSG_NETWORK_ATTR:
		case IMSG_NETWORK_REMOVE:
		case IMSG_NETWORK_FLUSH:
		case IMSG_NETWORK_DONE:
		case IMSG_FILTER_SET:
			imsg_ctl_rde(imsg.hdr.type, 0,
			    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 */
			imsg_ctl_parent(imsg.hdr.type, 0, imsg.hdr.pid,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
			imsg_ctl_rde(imsg.hdr.type, 0,
			    imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);

			memcpy(&verbose, imsg.data, sizeof(verbose));
			log_verbose(verbose);
			break;
		default:
			break;
		}
		imsg_free(&imsg);
	}

	return (0);
}

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

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

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

void
control_result(struct ctl_conn *c, u_int code)
{
	imsg_compose(&c->ibuf, IMSG_CTL_RESULT, 0, c->ibuf.pid, -1,
	    &code, sizeof(code));
}

/* This should go into libutil, from smtpd/mproc.c */
ssize_t
imsg_read_nofd(struct imsgbuf *ibuf)
{
	ssize_t	 n;
	char	*buf;
	size_t	 len;

	buf = ibuf->r.buf + ibuf->r.wpos;
	len = sizeof(ibuf->r.buf) - ibuf->r.wpos;

	while ((n = recv(ibuf->fd, buf, len, 0)) == -1) {
		if (errno != EINTR)
			return (n);
	}

	ibuf->r.wpos += n;
	return (n);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: control.c,v 1.82 2015/12/05 18:28:04 benno 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 <stdlib.h>
25			#include <string.h>
26			#include <unistd.h>
27
28			#include "bgpd.h"
29			#include "session.h"
30
31			#define CONTROL_BACKLOG 5
32
33			struct ctl_conn *control_connbyfd(int);
34			struct ctl_conn *control_connbypid(pid_t);
35			int control_close(int);
36			void control_result(struct ctl_conn *, u_int);
37			ssize_t imsg_read_nofd(struct imsgbuf *);
38
39			int
40			control_init(int restricted, char *path)
41			{
42			struct sockaddr_un sun;
43			int fd;
44			mode_t old_umask, mode;
45
46			if ((fd = socket(AF_UNIX, SOCK_STREAM \| SOCK_CLOEXEC \| SOCK_NONBLOCK,
47			0)) == -1) {
48			log_warn("control_init: socket");
49			return (-1);
50			}
51
52			bzero(&sun, sizeof(sun));
53			sun.sun_family = AF_UNIX;
54			if (strlcpy(sun.sun_path, path, sizeof(sun.sun_path)) >=
55			sizeof(sun.sun_path)) {
56			log_warn("control_init: socket name too long");
57			close(fd);
58			return (-1);
59			}
60
61			if (unlink(path) == -1)
62			if (errno != ENOENT) {
63			log_warn("control_init: unlink %s", path);
64			close(fd);
65			return (-1);
66			}
67
68			if (restricted) {
69			old_umask = umask(S_IXUSR\|S_IXGRP\|S_IXOTH);
70			mode = S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IWGRP\|S_IROTH\|S_IWOTH;
71			} else {
72			old_umask = umask(S_IXUSR\|S_IXGRP\|S_IWOTH\|S_IROTH\|S_IXOTH);
73			mode = S_IRUSR\|S_IWUSR\|S_IRGRP\|S_IWGRP;
74			}
75
76			if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
77			log_warn("control_init: bind: %s", path);
78			close(fd);
79			umask(old_umask);
80			return (-1);
81			}
82
83			umask(old_umask);
84
85			if (chmod(path, mode) == -1) {
86			log_warn("control_init: chmod: %s", path);
87			close(fd);
88			unlink(path);
89			return (-1);
90			}
91
92			return (fd);
93			}
94
95			int
96			control_listen(int fd)
97			{
98			if (fd != -1 && listen(fd, CONTROL_BACKLOG) == -1) {
99			log_warn("control_listen: listen");
100			return (-1);
101			}
102
103			return (0);
104			}
105
106			void
107			control_shutdown(int fd)
108			{
109			close(fd);
110			}
111
112			void
113			control_cleanup(const char *path)
114			{
115			if (path)
116			unlink(path);
117			}
118
119			unsigned int
120			control_accept(int listenfd, int restricted)
121			{
122			int connfd;
123			socklen_t len;
124			struct sockaddr_un sun;
125			struct ctl_conn *ctl_conn;
126
127			len = sizeof(sun);
128			if ((connfd = accept4(listenfd,
129			(struct sockaddr *)&sun, &len,
130			SOCK_NONBLOCK \| SOCK_CLOEXEC)) == -1) {
131			if (errno == ENFILE \|\| errno == EMFILE) {
132			pauseaccept = getmonotime();
133			return (0);
134			} else if (errno != EWOULDBLOCK && errno != EINTR &&
135			errno != ECONNABORTED)
136			log_warn("control_accept: accept");
137			return (0);
138			}
139
140			if ((ctl_conn = calloc(1, sizeof(struct ctl_conn))) == NULL) {
141			log_warn("control_accept");
142			close(connfd);
143			return (0);
144			}
145
146			imsg_init(&ctl_conn->ibuf, connfd);
147			ctl_conn->restricted = restricted;
148
149			TAILQ_INSERT_TAIL(&ctl_conns, ctl_conn, entry);
150
151			return (1);
152			}
153
154			struct ctl_conn *
155			control_connbyfd(int fd)
156			{
157			struct ctl_conn *c;
158
159			for (c = TAILQ_FIRST(&ctl_conns); c != NULL && c->ibuf.fd != fd;
160			c = TAILQ_NEXT(c, entry))
161			; /* nothing */
162
163			return (c);
164			}
165
166			struct ctl_conn *
167			control_connbypid(pid_t pid)
168			{
169			struct ctl_conn *c;
170
171			for (c = TAILQ_FIRST(&ctl_conns); c != NULL && c->ibuf.pid != pid;
172			c = TAILQ_NEXT(c, entry))
173			; /* nothing */
174
175			return (c);
176			}
177
178			int
179			control_close(int fd)
180			{
181			struct ctl_conn *c;
182
183			if ((c = control_connbyfd(fd)) == NULL) {
184			log_warn("control_close: fd %d: not found", fd);
185			return (0);
186			}
187
188			msgbuf_clear(&c->ibuf.w);
189			TAILQ_REMOVE(&ctl_conns, c, entry);
190
191			close(c->ibuf.fd);
192			free(c);
193			pauseaccept = 0;
194			return (1);
195			}
196
197			int
198			control_dispatch_msg(struct pollfd pfd, u_int ctl_cnt)
199			{
200			struct imsg imsg;
201			struct ctl_conn *c;
202			ssize_t n;
203			int verbose;
204			struct peer *p;
205			struct ctl_neighbor *neighbor;
206			struct ctl_show_rib_request *ribreq;
207
208			if ((c = control_connbyfd(pfd->fd)) == NULL) {
209			log_warn("control_dispatch_msg: fd %d: not found", pfd->fd);
210			return (0);
211			}
212
213			if (pfd->revents & POLLOUT)
214			if (msgbuf_write(&c->ibuf.w) <= 0 && errno != EAGAIN) {
215			*ctl_cnt -= control_close(pfd->fd);
216			return (1);
217			}
218
219			if (!(pfd->revents & POLLIN))
220			return (0);
221
222			if (((n = imsg_read_nofd(&c->ibuf)) == -1 && errno != EAGAIN) \|\|
223			n == 0) {
224			*ctl_cnt -= control_close(pfd->fd);
225			return (1);
226			}
227
228			for (;;) {
229			if ((n = imsg_get(&c->ibuf, &imsg)) == -1) {
230			*ctl_cnt -= control_close(pfd->fd);
231			return (1);
232			}
233
234			if (n == 0)
235			break;
236
237			if (c->restricted) {
238			switch (imsg.hdr.type) {
239			case IMSG_CTL_SHOW_NEIGHBOR:
240			case IMSG_CTL_SHOW_NEXTHOP:
241			case IMSG_CTL_SHOW_INTERFACE:
242			case IMSG_CTL_SHOW_RIB:
243			case IMSG_CTL_SHOW_RIB_AS:
244			case IMSG_CTL_SHOW_RIB_PREFIX:
245			case IMSG_CTL_SHOW_RIB_MEM:
246			case IMSG_CTL_SHOW_RIB_COMMUNITY:
247			case IMSG_CTL_SHOW_NETWORK:
248			case IMSG_CTL_SHOW_TERSE:
249			case IMSG_CTL_SHOW_TIMER:
250			break;
251			default:
252			/* clear imsg type to prevent processing */
253			imsg.hdr.type = IMSG_NONE;
254			control_result(c, CTL_RES_DENIED);
255			break;
256			}
257			}
258
259			switch (imsg.hdr.type) {
260			case IMSG_NONE:
261			/* message was filtered out, nothing to do */
262			break;
263			case IMSG_CTL_SHOW_NEIGHBOR:
264			c->ibuf.pid = imsg.hdr.pid;
265			if (imsg.hdr.len == IMSG_HEADER_SIZE +
266			sizeof(struct ctl_neighbor)) {
267			neighbor = imsg.data;
268			p = getpeerbyaddr(&neighbor->addr);
269			if (p == NULL)
270			p = getpeerbydesc(neighbor->descr);
271			if (p == NULL) {
272			control_result(c, CTL_RES_NOSUCHPEER);
273			break;
274			}
275			if (!neighbor->show_timers) {
276			imsg_ctl_rde(imsg.hdr.type,
277			imsg.hdr.pid,
278			p, sizeof(struct peer));
279			imsg_ctl_rde(IMSG_CTL_END,
280			imsg.hdr.pid, NULL, 0);
281			} else {
282			u_int i;
283			time_t d;
284			struct ctl_timer ct;
285
286			imsg_compose(&c->ibuf,
287			IMSG_CTL_SHOW_NEIGHBOR,
288			0, 0, -1, p, sizeof(*p));
289			for (i = 1; i < Timer_Max; i++) {
290			if (!timer_running(p, i, &d))
291			continue;
292			ct.type = i;
293			ct.val = d;
294			imsg_compose(&c->ibuf,
295			IMSG_CTL_SHOW_TIMER,
296			0, 0, -1, &ct, sizeof(ct));
297			}
298			imsg_compose(&c->ibuf, IMSG_CTL_END,
299			0, 0, -1, NULL, 0);
300			}
301			} else {
302			for (p = peers; p != NULL; p = p->next)
303			imsg_ctl_rde(imsg.hdr.type,
304			imsg.hdr.pid,
305			p, sizeof(struct peer));
306			imsg_ctl_rde(IMSG_CTL_END, imsg.hdr.pid,
307			NULL, 0);
308			}
309			break;
310			case IMSG_CTL_SHOW_TERSE:
311			for (p = peers; p != NULL; p = p->next)
312			imsg_compose(&c->ibuf, IMSG_CTL_SHOW_NEIGHBOR,
313			0, 0, -1, p, sizeof(struct peer));
314			imsg_compose(&c->ibuf, IMSG_CTL_END, 0, 0, -1, NULL, 0);
315			break;
316			case IMSG_CTL_FIB_COUPLE:
317			case IMSG_CTL_FIB_DECOUPLE:
318			imsg_ctl_parent(imsg.hdr.type, imsg.hdr.peerid,
319			0, NULL, 0);
320			break;
321			case IMSG_CTL_NEIGHBOR_UP:
322			case IMSG_CTL_NEIGHBOR_DOWN:
323			case IMSG_CTL_NEIGHBOR_CLEAR:
324			case IMSG_CTL_NEIGHBOR_RREFRESH:
325			case IMSG_CTL_NEIGHBOR_DESTROY:
326			if (imsg.hdr.len == IMSG_HEADER_SIZE +
327			sizeof(struct ctl_neighbor)) {
328			neighbor = imsg.data;
329			neighbor->descr[PEER_DESCR_LEN - 1] = 0;
330			p = getpeerbyaddr(&neighbor->addr);
331			if (p == NULL)
332			p = getpeerbydesc(neighbor->descr);
333			if (p == NULL) {
334			control_result(c, CTL_RES_NOSUCHPEER);
335			break;
336			}
337			switch (imsg.hdr.type) {
338			case IMSG_CTL_NEIGHBOR_UP:
339			bgp_fsm(p, EVNT_START);
340			control_result(c, CTL_RES_OK);
341			break;
342			case IMSG_CTL_NEIGHBOR_DOWN:
343			session_stop(p, ERR_CEASE_ADMIN_DOWN);
344			control_result(c, CTL_RES_OK);
345			break;
346			case IMSG_CTL_NEIGHBOR_CLEAR:
347			if (!p->conf.down) {
348			session_stop(p,
349			ERR_CEASE_ADMIN_RESET);
350			timer_set(p, Timer_IdleHold,
351			SESSION_CLEAR_DELAY);
352			} else {
353			session_stop(p,
354			ERR_CEASE_ADMIN_DOWN);
355			}
356			control_result(c, CTL_RES_OK);
357			break;
358			case IMSG_CTL_NEIGHBOR_RREFRESH:
359			if (session_neighbor_rrefresh(p))
360			control_result(c,
361			CTL_RES_NOCAP);
362			else
363			control_result(c, CTL_RES_OK);
364			break;
365			case IMSG_CTL_NEIGHBOR_DESTROY:
366			if (!p->template)
367			control_result(c,
368			CTL_RES_BADPEER);
369			else if (p->state != STATE_IDLE)
370			control_result(c,
371			CTL_RES_BADSTATE);
372			else {
373			/*
374			* Mark as deleted, will be
375			* collected on next poll loop.
376			*/
377			p->conf.reconf_action =
378			RECONF_DELETE;
379			control_result(c, CTL_RES_OK);
380			}
381			break;
382			default:
383			fatal("king bula wants more humppa");
384			}
385			} else
386			log_warnx("got IMSG_CTL_NEIGHBOR_ with "
387			"wrong length");
388			break;
389			case IMSG_CTL_RELOAD:
390			case IMSG_CTL_SHOW_INTERFACE:
391			case IMSG_CTL_SHOW_FIB_TABLES:
392			c->ibuf.pid = imsg.hdr.pid;
393			imsg_ctl_parent(imsg.hdr.type, 0, imsg.hdr.pid,
394			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
395			break;
396			case IMSG_CTL_KROUTE:
397			case IMSG_CTL_KROUTE_ADDR:
398			case IMSG_CTL_SHOW_NEXTHOP:
399			c->ibuf.pid = imsg.hdr.pid;
400			imsg_ctl_parent(imsg.hdr.type, imsg.hdr.peerid,
401			imsg.hdr.pid, imsg.data, imsg.hdr.len -
402			IMSG_HEADER_SIZE);
403			break;
404			case IMSG_CTL_SHOW_RIB:
405			case IMSG_CTL_SHOW_RIB_AS:
406			case IMSG_CTL_SHOW_RIB_PREFIX:
407			if (imsg.hdr.len == IMSG_HEADER_SIZE +
408			sizeof(struct ctl_show_rib_request)) {
409			ribreq = imsg.data;
410			neighbor = &ribreq->neighbor;
411			neighbor->descr[PEER_DESCR_LEN - 1] = 0;
412			ribreq->peerid = 0;
413			p = NULL;
414			if (neighbor->addr.aid) {
415			p = getpeerbyaddr(&neighbor->addr);
416			if (p == NULL) {
417			control_result(c,
418			CTL_RES_NOSUCHPEER);
419			break;
420			}
421			ribreq->peerid = p->conf.id;
422			} else if (neighbor->descr[0]) {
423			p = getpeerbydesc(neighbor->descr);
424			if (p == NULL) {
425			control_result(c,
426			CTL_RES_NOSUCHPEER);
427			break;
428			}
429			ribreq->peerid = p->conf.id;
430			}
431			if ((ribreq->flags &
432			(F_CTL_ADJ_OUT \| F_CTL_ADJ_IN)) && !p) {
433			/*
434			* both in and out tables are only
435			* meaningful if used on a single
436			* peer.
437			*/
438			control_result(c, CTL_RES_NOSUCHPEER);
439			break;
440			}
441			if ((ribreq->flags & F_CTL_ADJ_IN) && p &&
442			!p->conf.softreconfig_in) {
443			/*
444			* without softreconfig_in we do not
445			* have an Adj-RIB-In table
446			*/
447			control_result(c, CTL_RES_NOCAP);
448			break;
449			}
450			if ((imsg.hdr.type == IMSG_CTL_SHOW_RIB_PREFIX)
451			&& (ribreq->prefix.aid == AID_UNSPEC)) {
452			/* malformed request, must specify af */
453			control_result(c, CTL_RES_PARSE_ERROR);
454			break;
455			}
456			c->ibuf.pid = imsg.hdr.pid;
457			imsg_ctl_rde(imsg.hdr.type, imsg.hdr.pid,
458			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
459			} else
460			log_warnx("got IMSG_CTL_SHOW_RIB with "
461			"wrong length");
462			break;
463			case IMSG_CTL_SHOW_RIB_MEM:
464			case IMSG_CTL_SHOW_RIB_COMMUNITY:
465			case IMSG_CTL_SHOW_NETWORK:
466			c->ibuf.pid = imsg.hdr.pid;
467			imsg_ctl_rde(imsg.hdr.type, imsg.hdr.pid,
468			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
469			break;
470			case IMSG_NETWORK_ADD:
471			case IMSG_NETWORK_ASPATH:
472			case IMSG_NETWORK_ATTR:
473			case IMSG_NETWORK_REMOVE:
474			case IMSG_NETWORK_FLUSH:
475			case IMSG_NETWORK_DONE:
476			case IMSG_FILTER_SET:
477			imsg_ctl_rde(imsg.hdr.type, 0,
478			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
479			break;
480			case IMSG_CTL_LOG_VERBOSE:
481			if (imsg.hdr.len != IMSG_HEADER_SIZE +
482			sizeof(verbose))
483			break;
484
485			/* forward to other processes */
486			imsg_ctl_parent(imsg.hdr.type, 0, imsg.hdr.pid,
487			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
488			imsg_ctl_rde(imsg.hdr.type, 0,
489			imsg.data, imsg.hdr.len - IMSG_HEADER_SIZE);
490
491			memcpy(&verbose, imsg.data, sizeof(verbose));
492			log_verbose(verbose);
493			break;
494			default:
495			break;
496			}
497			imsg_free(&imsg);
498			}
499
500			return (0);
501			}
502
503			int
504			control_imsg_relay(struct imsg *imsg)
505			{
506			struct ctl_conn *c;
507
508			if ((c = control_connbypid(imsg->hdr.pid)) == NULL)
509			return (0);
510
511			return (imsg_compose(&c->ibuf, imsg->hdr.type, 0, imsg->hdr.pid, -1,
512			imsg->data, imsg->hdr.len - IMSG_HEADER_SIZE));
513			}
514
515			void
516			control_result(struct ctl_conn *c, u_int code)
517			{
518			imsg_compose(&c->ibuf, IMSG_CTL_RESULT, 0, c->ibuf.pid, -1,
519			&code, sizeof(code));
520			}
521
522			/* This should go into libutil, from smtpd/mproc.c */
523			ssize_t
524			imsg_read_nofd(struct imsgbuf *ibuf)
525			{
526			ssize_t n;
527			char *buf;
528			size_t len;
529
530			buf = ibuf->r.buf + ibuf->r.wpos;
531			len = sizeof(ibuf->r.buf) - ibuf->r.wpos;
532
533			while ((n = recv(ibuf->fd, buf, len, 0)) == -1) {
534			if (errno != EINTR)
535			return (n);
536			}
537
538			ibuf->r.wpos += n;
539			return (n);
540			}