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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/bgpd/carp.c	Lines:	0	62	0.0 %
Date:	2016-12-06	Branches:	0	48	0.0 %


/*	$OpenBSD: carp.c,v 1.8 2015/12/05 18:28:04 benno Exp $ */

/*
 * Copyright (c) 2006 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/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>

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

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

struct carpgroup {
	TAILQ_ENTRY(carpgroup)	 entry;
	char			*group;
	int			 do_demote;
	int			 changed_by;
};

TAILQ_HEAD(carpgroups, carpgroup)	carpgroups =
    TAILQ_HEAD_INITIALIZER(carpgroups);

struct carpgroup	*carp_group_find(char *group);
int			 carp_demote_ioctl(char *, int);

struct carpgroup *
carp_group_find(char *group)
{
	struct carpgroup	*c;

	TAILQ_FOREACH(c, &carpgroups, entry)
		if (!strcmp(c->group, group))
			return (c);

	return (NULL);
}

int
carp_demote_init(char *group, int force)
{
	struct carpgroup	*c;
	int			 level;

	if ((c = carp_group_find(group)) == NULL) {
		if ((c = calloc(1, sizeof(struct carpgroup))) == NULL) {
			log_warn("carp_demote_init calloc");
			return (-1);
		}
		if ((c->group = strdup(group)) == NULL) {
			log_warn("carp_demote_init strdup");
			free(c);
			return (-1);
		}

		/* only demote if this group already is demoted */
		if ((level = carp_demote_get(group)) == -1) {
			free(c->group);
			free(c);
			return (-1);
		}
		if (level > 0 || force)
			c->do_demote = 1;

		TAILQ_INSERT_TAIL(&carpgroups, c, entry);
	}

	return (0);
}

void
carp_demote_shutdown(void)
{
	struct carpgroup	*c;

	while ((c = TAILQ_FIRST(&carpgroups)) != NULL) {
		TAILQ_REMOVE(&carpgroups, c, entry);
		if (c->do_demote && c->changed_by > 0)
			carp_demote_ioctl(c->group, -c->changed_by);

		free(c->group);
		free(c);
	}
}

int
carp_demote_get(char *group)
{
	int			s;
	struct ifgroupreq	ifgr;

	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
		log_warn("carp_demote_get: socket");
		return (-1);
	}

	bzero(&ifgr, sizeof(ifgr));
	strlcpy(ifgr.ifgr_name, group, sizeof(ifgr.ifgr_name));

	if (ioctl(s, SIOCGIFGATTR, (caddr_t)&ifgr) == -1) {
		if (errno == ENOENT)
			log_warnx("group \"%s\" does not exist", group);
		else
			log_warn("carp_demote_get: ioctl");
		close(s);
		return (-1);
	}

	close(s);
	return ((int)ifgr.ifgr_attrib.ifg_carp_demoted);
}

int
carp_demote_set(char *group, int demote)
{
	struct carpgroup	*c;

	if ((c = carp_group_find(group)) == NULL) {
		log_warnx("carp_group_find for %s returned NULL?!", group);
		return (-1);
	}

	if (c->changed_by + demote < 0) {
		log_warnx("carp_demote_set: changed_by + demote < 0");
		return (-1);
	}

	if (c->do_demote && carp_demote_ioctl(group, demote) == -1)
		return (-1);

	c->changed_by += demote;

	/* enable demotion when we return to 0, i. e. all sessions up */
	if (demote < 0 && c->changed_by == 0)
		c->do_demote = 1;

	return (0);
}

int
carp_demote_ioctl(char *group, int demote)
{
	int			s, res;
	struct ifgroupreq	ifgr;

	if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
		log_warn("%s: socket", __func__);
		return (-1);
	}

	bzero(&ifgr, sizeof(ifgr));
	strlcpy(ifgr.ifgr_name, group, sizeof(ifgr.ifgr_name));
	ifgr.ifgr_attrib.ifg_carp_demoted = demote;

	if ((res = ioctl(s, SIOCSIFGATTR, (caddr_t)&ifgr)) == -1)
		log_warn("unable to %s the demote state "
		    "of group '%s'", (demote > 0) ? "increment" : "decrement",
		    group);
	else
		log_info("%s the demote state of group '%s'",
		    (demote > 0) ? "incremented" : "decremented", group);

	close(s);
	return (res);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: carp.c,v 1.8 2015/12/05 18:28:04 benno Exp $ */
2
3			/*
4			* Copyright (c) 2006 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/socket.h>
21			#include <sys/ioctl.h>
22			#include <net/if.h>
23
24			#include <errno.h>
25			#include <string.h>
26			#include <stdlib.h>
27			#include <unistd.h>
28
29			#include "bgpd.h"
30			#include "session.h"
31
32			struct carpgroup {
33			TAILQ_ENTRY(carpgroup) entry;
34			char *group;
35			int do_demote;
36			int changed_by;
37			};
38
39			TAILQ_HEAD(carpgroups, carpgroup) carpgroups =
40			TAILQ_HEAD_INITIALIZER(carpgroups);
41
42			struct carpgroup carp_group_find(char group);
43			int carp_demote_ioctl(char *, int);
44
45			struct carpgroup *
46			carp_group_find(char *group)
47			{
48			struct carpgroup *c;
49
50			TAILQ_FOREACH(c, &carpgroups, entry)
51			if (!strcmp(c->group, group))
52			return (c);
53
54			return (NULL);
55			}
56
57			int
58			carp_demote_init(char *group, int force)
59			{
60			struct carpgroup *c;
61			int level;
62
63			if ((c = carp_group_find(group)) == NULL) {
64			if ((c = calloc(1, sizeof(struct carpgroup))) == NULL) {
65			log_warn("carp_demote_init calloc");
66			return (-1);
67			}
68			if ((c->group = strdup(group)) == NULL) {
69			log_warn("carp_demote_init strdup");
70			free(c);
71			return (-1);
72			}
73
74			/* only demote if this group already is demoted */
75			if ((level = carp_demote_get(group)) == -1) {
76			free(c->group);
77			free(c);
78			return (-1);
79			}
80			if (level > 0 \|\| force)
81			c->do_demote = 1;
82
83			TAILQ_INSERT_TAIL(&carpgroups, c, entry);
84			}
85
86			return (0);
87			}
88
89			void
90			carp_demote_shutdown(void)
91			{
92			struct carpgroup *c;
93
94			while ((c = TAILQ_FIRST(&carpgroups)) != NULL) {
95			TAILQ_REMOVE(&carpgroups, c, entry);
96			if (c->do_demote && c->changed_by > 0)
97			carp_demote_ioctl(c->group, -c->changed_by);
98
99			free(c->group);
100			free(c);
101			}
102			}
103
104			int
105			carp_demote_get(char *group)
106			{
107			int s;
108			struct ifgroupreq ifgr;
109
110			if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
111			log_warn("carp_demote_get: socket");
112			return (-1);
113			}
114
115			bzero(&ifgr, sizeof(ifgr));
116			strlcpy(ifgr.ifgr_name, group, sizeof(ifgr.ifgr_name));
117
118			if (ioctl(s, SIOCGIFGATTR, (caddr_t)&ifgr) == -1) {
119			if (errno == ENOENT)
120			log_warnx("group \"%s\" does not exist", group);
121			else
122			log_warn("carp_demote_get: ioctl");
123			close(s);
124			return (-1);
125			}
126
127			close(s);
128			return ((int)ifgr.ifgr_attrib.ifg_carp_demoted);
129			}
130
131			int
132			carp_demote_set(char *group, int demote)
133			{
134			struct carpgroup *c;
135
136			if ((c = carp_group_find(group)) == NULL) {
137			log_warnx("carp_group_find for %s returned NULL?!", group);
138			return (-1);
139			}
140
141			if (c->changed_by + demote < 0) {
142			log_warnx("carp_demote_set: changed_by + demote < 0");
143			return (-1);
144			}
145
146			if (c->do_demote && carp_demote_ioctl(group, demote) == -1)
147			return (-1);
148
149			c->changed_by += demote;
150
151			/* enable demotion when we return to 0, i. e. all sessions up */
152			if (demote < 0 && c->changed_by == 0)
153			c->do_demote = 1;
154
155			return (0);
156			}
157
158			int
159			carp_demote_ioctl(char *group, int demote)
160			{
161			int s, res;
162			struct ifgroupreq ifgr;
163
164			if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == -1) {
165			log_warn("%s: socket", __func__);
166			return (-1);
167			}
168
169			bzero(&ifgr, sizeof(ifgr));
170			strlcpy(ifgr.ifgr_name, group, sizeof(ifgr.ifgr_name));
171			ifgr.ifgr_attrib.ifg_carp_demoted = demote;
172
173			if ((res = ioctl(s, SIOCSIFGATTR, (caddr_t)&ifgr)) == -1)
174			log_warn("unable to %s the demote state "
175			"of group '%s'", (demote > 0) ? "increment" : "decrement",
176			group);
177			else
178			log_info("%s the demote state of group '%s'",
179			(demote > 0) ? "incremented" : "decremented", group);
180
181			close(s);
182			return (res);
183			}