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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.sbin/eigrpd/util.c	Lines:	0	140	0.0 %
Date:	2017-11-07	Branches:	0	173	0.0 %


/*	$OpenBSD: util.c,v 1.9 2016/09/02 16:36:33 renato Exp $ */

/*
 * Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
 * Copyright (c) 2012 Alexander Bluhm <bluhm@openbsd.org>
 * Copyright (c) 2004 Esben Norby <norby@openbsd.org>
 * 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 <string.h>

#include "eigrpd.h"
#include "log.h"

uint8_t
mask2prefixlen(in_addr_t ina)
{
	if (ina == 0)
		return (0);
	else
		return (33 - ffs(ntohl(ina)));
}

uint8_t
mask2prefixlen6(struct sockaddr_in6 *sa_in6)
{
	uint8_t	l = 0, *ap, *ep;

	/*
	 * sin6_len is the size of the sockaddr so substract the offset of
	 * the possibly truncated sin6_addr struct.
	 */
	ap = (uint8_t *)&sa_in6->sin6_addr;
	ep = (uint8_t *)sa_in6 + sa_in6->sin6_len;
	for (; ap < ep; ap++) {
		/* this "beauty" is adopted from sbin/route/show.c ... */
		switch (*ap) {
		case 0xff:
			l += 8;
			break;
		case 0xfe:
			l += 7;
			return (l);
		case 0xfc:
			l += 6;
			return (l);
		case 0xf8:
			l += 5;
			return (l);
		case 0xf0:
			l += 4;
			return (l);
		case 0xe0:
			l += 3;
			return (l);
		case 0xc0:
			l += 2;
			return (l);
		case 0x80:
			l += 1;
			return (l);
		case 0x00:
			return (l);
		default:
			fatalx("non contiguous inet6 netmask");
		}
	}

	return (l);
}

in_addr_t
prefixlen2mask(uint8_t prefixlen)
{
	if (prefixlen == 0)
		return (0);

	return (htonl(0xffffffff << (32 - prefixlen)));
}

struct in6_addr *
prefixlen2mask6(uint8_t prefixlen)
{
	static struct in6_addr	mask;
	int			i;

	memset(&mask, 0, sizeof(mask));
	for (i = 0; i < prefixlen / 8; i++)
		mask.s6_addr[i] = 0xff;
	i = prefixlen % 8;
	if (i)
		mask.s6_addr[prefixlen / 8] = 0xff00 >> i;

	return (&mask);
}

void
eigrp_applymask(int af, union eigrpd_addr *dest, const union eigrpd_addr *src,
    int prefixlen)
{
	struct in6_addr	mask;
	int		i;

	switch (af) {
	case AF_INET:
		dest->v4.s_addr = src->v4.s_addr & prefixlen2mask(prefixlen);
		break;
	case AF_INET6:
		memset(&mask, 0, sizeof(mask));
		for (i = 0; i < prefixlen / 8; i++)
			mask.s6_addr[i] = 0xff;
		i = prefixlen % 8;
		if (i)
			mask.s6_addr[prefixlen / 8] = 0xff00 >> i;

		for (i = 0; i < 16; i++)
			dest->v6.s6_addr[i] = src->v6.s6_addr[i] &
			    mask.s6_addr[i];
		break;
	default:
		fatalx("eigrp_applymask: unknown af");
	}
}

int
eigrp_addrcmp(int af, const union eigrpd_addr *a, const union eigrpd_addr *b)
{
	switch (af) {
	case AF_INET:
		if (a->v4.s_addr == b->v4.s_addr)
			return (0);
		return ((ntohl(a->v4.s_addr) > ntohl(b->v4.s_addr)) ? 1 : -1);
	case AF_INET6:
		return (!!memcmp(&a->v6, &b->v6, sizeof(struct in6_addr)));
	default:
		fatalx("eigrp_addrcmp: unknown af");
	}
}

int
eigrp_addrisset(int af, const union eigrpd_addr *addr)
{
	switch (af) {
	case AF_UNSPEC:
		return (0);
	case AF_INET:
		if (addr->v4.s_addr != INADDR_ANY)
			return (1);
		break;
	case AF_INET6:
		if (!IN6_IS_ADDR_UNSPECIFIED(&addr->v6))
			return (1);
		break;
	default:
		fatalx("eigrp_addrisset: unknown af");
	}

	return (0);
}

int
eigrp_prefixcmp(int af, const union eigrpd_addr *a, const union eigrpd_addr *b,
    uint8_t prefixlen)
{
	in_addr_t	mask, aa, ba;
	int		i;
	uint8_t		m;

	switch (af) {
	case AF_INET:
		if (prefixlen == 0)
			return (0);
		if (prefixlen > 32)
			fatalx("eigrp_prefixcmp: bad IPv4 prefixlen");
		mask = htonl(prefixlen2mask(prefixlen));
		aa = htonl(a->v4.s_addr) & mask;
		ba = htonl(b->v4.s_addr) & mask;
		return (aa - ba);
	case AF_INET6:
		if (prefixlen == 0)
			return (0);
		if (prefixlen > 128)
			fatalx("eigrp_prefixcmp: bad IPv6 prefixlen");
		for (i = 0; i < prefixlen / 8; i++)
			if (a->v6.s6_addr[i] != b->v6.s6_addr[i])
				return (a->v6.s6_addr[i] - b->v6.s6_addr[i]);
		i = prefixlen % 8;
		if (i) {
			m = 0xff00 >> i;
			if ((a->v6.s6_addr[prefixlen / 8] & m) !=
			    (b->v6.s6_addr[prefixlen / 8] & m))
				return ((a->v6.s6_addr[prefixlen / 8] & m) -
				    (b->v6.s6_addr[prefixlen / 8] & m));
		}
		return (0);
	default:
		fatalx("eigrp_prefixcmp: unknown af");
	}
	return (-1);
}

int
bad_addr_v4(struct in_addr addr)
{
	uint32_t	 a = ntohl(addr.s_addr);

	if (((a >> IN_CLASSA_NSHIFT) == 0) ||
	    ((a >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) ||
	    IN_MULTICAST(a) || IN_BADCLASS(a))
		return (1);

	return (0);
}

int
bad_addr_v6(struct in6_addr *addr)
{
	if (IN6_IS_ADDR_UNSPECIFIED(addr) ||
	    IN6_IS_ADDR_LOOPBACK(addr) ||
	    IN6_IS_ADDR_MULTICAST(addr) ||
	    IN6_IS_ADDR_SITELOCAL(addr) ||
	    IN6_IS_ADDR_V4MAPPED(addr) ||
	    IN6_IS_ADDR_V4COMPAT(addr))
		return (1);

	return (0);
}

int
bad_addr(int af, union eigrpd_addr *addr)
{
	switch (af) {
	case AF_INET:
		return (bad_addr_v4(addr->v4));
	case AF_INET6:
		return (bad_addr_v6(&addr->v6));
	default:
		fatalx("bad_addr: unknown af");
	}
}

void
embedscope(struct sockaddr_in6 *sin6)
{
	uint16_t	 tmp16;

	if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr)) {
		memcpy(&tmp16, &sin6->sin6_addr.s6_addr[2], sizeof(tmp16));
		if (tmp16 != 0) {
			log_warnx("%s: address %s already has embeded scope %u",
			    __func__, log_sockaddr(sin6), ntohs(tmp16));
		}
		tmp16 = htons(sin6->sin6_scope_id);
		memcpy(&sin6->sin6_addr.s6_addr[2], &tmp16, sizeof(tmp16));
		sin6->sin6_scope_id = 0;
	}
}

void
recoverscope(struct sockaddr_in6 *sin6)
{
	uint16_t	 tmp16;

	if (sin6->sin6_scope_id != 0)
		log_warnx("%s: address %s already has scope id %u",
		    __func__, log_sockaddr(sin6), sin6->sin6_scope_id);

	if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr)) {
		memcpy(&tmp16, &sin6->sin6_addr.s6_addr[2], sizeof(tmp16));
		sin6->sin6_scope_id = ntohs(tmp16);
		sin6->sin6_addr.s6_addr[2] = 0;
		sin6->sin6_addr.s6_addr[3] = 0;
	}
}

void
addscope(struct sockaddr_in6 *sin6, uint32_t id)
{
	if (sin6->sin6_scope_id != 0)
		log_warnx("%s: address %s already has scope id %u", __func__,
		    log_sockaddr(sin6), sin6->sin6_scope_id);

	if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr))
		sin6->sin6_scope_id = id;
}

void
clearscope(struct in6_addr *in6)
{
	if (IN6_IS_SCOPE_EMBED(in6)) {
		in6->s6_addr[2] = 0;
		in6->s6_addr[3] = 0;
	}
}

void
sa2addr(struct sockaddr *sa, int *af, union eigrpd_addr *addr)
{
	struct sockaddr_in		*sa_in = (struct sockaddr_in *)sa;
	struct sockaddr_in6		*sa_in6 = (struct sockaddr_in6 *)sa;

	memset(addr, 0, sizeof(*addr));
	switch (sa->sa_family) {
	case AF_INET:
		*af = AF_INET;
		addr->v4 = sa_in->sin_addr;
		break;
	case AF_INET6:
		*af = AF_INET6;
		addr->v6 = sa_in6->sin6_addr;
		break;
	default:
		fatalx("sa2addr: unknown af");
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: util.c,v 1.9 2016/09/02 16:36:33 renato Exp $ */
2
3			/*
4			* Copyright (c) 2015 Renato Westphal <renato@openbsd.org>
5			* Copyright (c) 2012 Alexander Bluhm <bluhm@openbsd.org>
6			* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
7			* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
8			*
9			* Permission to use, copy, modify, and distribute this software for any
10			* purpose with or without fee is hereby granted, provided that the above
11			* copyright notice and this permission notice appear in all copies.
12			*
13			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17			* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18			* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19			* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20			*/
21
22			#include <sys/types.h>
23
24			#include <string.h>
25
26			#include "eigrpd.h"
27			#include "log.h"
28
29			uint8_t
30			mask2prefixlen(in_addr_t ina)
31			{
32			if (ina == 0)
33			return (0);
34			else
35			return (33 - ffs(ntohl(ina)));
36			}
37
38			uint8_t
39			mask2prefixlen6(struct sockaddr_in6 *sa_in6)
40			{
41			uint8_t l = 0, ap, ep;
42
43			/*
44			* sin6_len is the size of the sockaddr so substract the offset of
45			* the possibly truncated sin6_addr struct.
46			*/
47			ap = (uint8_t *)&sa_in6->sin6_addr;
48			ep = (uint8_t *)sa_in6 + sa_in6->sin6_len;
49			for (; ap < ep; ap++) {
50			/* this "beauty" is adopted from sbin/route/show.c ... */
51			switch (*ap) {
52			case 0xff:
53			l += 8;
54			break;
55			case 0xfe:
56			l += 7;
57			return (l);
58			case 0xfc:
59			l += 6;
60			return (l);
61			case 0xf8:
62			l += 5;
63			return (l);
64			case 0xf0:
65			l += 4;
66			return (l);
67			case 0xe0:
68			l += 3;
69			return (l);
70			case 0xc0:
71			l += 2;
72			return (l);
73			case 0x80:
74			l += 1;
75			return (l);
76			case 0x00:
77			return (l);
78			default:
79			fatalx("non contiguous inet6 netmask");
80			}
81			}
82
83			return (l);
84			}
85
86			in_addr_t
87			prefixlen2mask(uint8_t prefixlen)
88			{
89			if (prefixlen == 0)
90			return (0);
91
92			return (htonl(0xffffffff << (32 - prefixlen)));
93			}
94
95			struct in6_addr *
96			prefixlen2mask6(uint8_t prefixlen)
97			{
98			static struct in6_addr mask;
99			int i;
100
101			memset(&mask, 0, sizeof(mask));
102			for (i = 0; i < prefixlen / 8; i++)
103			mask.s6_addr[i] = 0xff;
104			i = prefixlen % 8;
105			if (i)
106			mask.s6_addr[prefixlen / 8] = 0xff00 >> i;
107
108			return (&mask);
109			}
110
111			void
112			eigrp_applymask(int af, union eigrpd_addr dest, const union eigrpd_addr src,
113			int prefixlen)
114			{
115			struct in6_addr mask;
116			int i;
117
118			switch (af) {
119			case AF_INET:
120			dest->v4.s_addr = src->v4.s_addr & prefixlen2mask(prefixlen);
121			break;
122			case AF_INET6:
123			memset(&mask, 0, sizeof(mask));
124			for (i = 0; i < prefixlen / 8; i++)
125			mask.s6_addr[i] = 0xff;
126			i = prefixlen % 8;
127			if (i)
128			mask.s6_addr[prefixlen / 8] = 0xff00 >> i;
129
130			for (i = 0; i < 16; i++)
131			dest->v6.s6_addr[i] = src->v6.s6_addr[i] &
132			mask.s6_addr[i];
133			break;
134			default:
135			fatalx("eigrp_applymask: unknown af");
136			}
137			}
138
139			int
140			eigrp_addrcmp(int af, const union eigrpd_addr a, const union eigrpd_addr b)
141			{
142			switch (af) {
143			case AF_INET:
144			if (a->v4.s_addr == b->v4.s_addr)
145			return (0);
146			return ((ntohl(a->v4.s_addr) > ntohl(b->v4.s_addr)) ? 1 : -1);
147			case AF_INET6:
148			return (!!memcmp(&a->v6, &b->v6, sizeof(struct in6_addr)));
149			default:
150			fatalx("eigrp_addrcmp: unknown af");
151			}
152			}
153
154			int
155			eigrp_addrisset(int af, const union eigrpd_addr *addr)
156			{
157			switch (af) {
158			case AF_UNSPEC:
159			return (0);
160			case AF_INET:
161			if (addr->v4.s_addr != INADDR_ANY)
162			return (1);
163			break;
164			case AF_INET6:
165			if (!IN6_IS_ADDR_UNSPECIFIED(&addr->v6))
166			return (1);
167			break;
168			default:
169			fatalx("eigrp_addrisset: unknown af");
170			}
171
172			return (0);
173			}
174
175			int
176			eigrp_prefixcmp(int af, const union eigrpd_addr a, const union eigrpd_addr b,
177			uint8_t prefixlen)
178			{
179			in_addr_t mask, aa, ba;
180			int i;
181			uint8_t m;
182
183			switch (af) {
184			case AF_INET:
185			if (prefixlen == 0)
186			return (0);
187			if (prefixlen > 32)
188			fatalx("eigrp_prefixcmp: bad IPv4 prefixlen");
189			mask = htonl(prefixlen2mask(prefixlen));
190			aa = htonl(a->v4.s_addr) & mask;
191			ba = htonl(b->v4.s_addr) & mask;
192			return (aa - ba);
193			case AF_INET6:
194			if (prefixlen == 0)
195			return (0);
196			if (prefixlen > 128)
197			fatalx("eigrp_prefixcmp: bad IPv6 prefixlen");
198			for (i = 0; i < prefixlen / 8; i++)
199			if (a->v6.s6_addr[i] != b->v6.s6_addr[i])
200			return (a->v6.s6_addr[i] - b->v6.s6_addr[i]);
201			i = prefixlen % 8;
202			if (i) {
203			m = 0xff00 >> i;
204			if ((a->v6.s6_addr[prefixlen / 8] & m) !=
205			(b->v6.s6_addr[prefixlen / 8] & m))
206			return ((a->v6.s6_addr[prefixlen / 8] & m) -
207			(b->v6.s6_addr[prefixlen / 8] & m));
208			}
209			return (0);
210			default:
211			fatalx("eigrp_prefixcmp: unknown af");
212			}
213			return (-1);
214			}
215
216			int
217			bad_addr_v4(struct in_addr addr)
218			{
219			uint32_t a = ntohl(addr.s_addr);
220
221			if (((a >> IN_CLASSA_NSHIFT) == 0) \|\|
222			((a >> IN_CLASSA_NSHIFT) == IN_LOOPBACKNET) \|\|
223			IN_MULTICAST(a) \|\| IN_BADCLASS(a))
224			return (1);
225
226			return (0);
227			}
228
229			int
230			bad_addr_v6(struct in6_addr *addr)
231			{
232			if (IN6_IS_ADDR_UNSPECIFIED(addr) \|\|
233			IN6_IS_ADDR_LOOPBACK(addr) \|\|
234			IN6_IS_ADDR_MULTICAST(addr) \|\|
235			IN6_IS_ADDR_SITELOCAL(addr) \|\|
236			IN6_IS_ADDR_V4MAPPED(addr) \|\|
237			IN6_IS_ADDR_V4COMPAT(addr))
238			return (1);
239
240			return (0);
241			}
242
243			int
244			bad_addr(int af, union eigrpd_addr *addr)
245			{
246			switch (af) {
247			case AF_INET:
248			return (bad_addr_v4(addr->v4));
249			case AF_INET6:
250			return (bad_addr_v6(&addr->v6));
251			default:
252			fatalx("bad_addr: unknown af");
253			}
254			}
255
256			void
257			embedscope(struct sockaddr_in6 *sin6)
258			{
259			uint16_t tmp16;
260
261			if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr)) {
262			memcpy(&tmp16, &sin6->sin6_addr.s6_addr[2], sizeof(tmp16));
263			if (tmp16 != 0) {
264			log_warnx("%s: address %s already has embeded scope %u",
265			__func__, log_sockaddr(sin6), ntohs(tmp16));
266			}
267			tmp16 = htons(sin6->sin6_scope_id);
268			memcpy(&sin6->sin6_addr.s6_addr[2], &tmp16, sizeof(tmp16));
269			sin6->sin6_scope_id = 0;
270			}
271			}
272
273			void
274			recoverscope(struct sockaddr_in6 *sin6)
275			{
276			uint16_t tmp16;
277
278			if (sin6->sin6_scope_id != 0)
279			log_warnx("%s: address %s already has scope id %u",
280			__func__, log_sockaddr(sin6), sin6->sin6_scope_id);
281
282			if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr)) {
283			memcpy(&tmp16, &sin6->sin6_addr.s6_addr[2], sizeof(tmp16));
284			sin6->sin6_scope_id = ntohs(tmp16);
285			sin6->sin6_addr.s6_addr[2] = 0;
286			sin6->sin6_addr.s6_addr[3] = 0;
287			}
288			}
289
290			void
291			addscope(struct sockaddr_in6 *sin6, uint32_t id)
292			{
293			if (sin6->sin6_scope_id != 0)
294			log_warnx("%s: address %s already has scope id %u", __func__,
295			log_sockaddr(sin6), sin6->sin6_scope_id);
296
297			if (IN6_IS_SCOPE_EMBED(&sin6->sin6_addr))
298			sin6->sin6_scope_id = id;
299			}
300
301			void
302			clearscope(struct in6_addr *in6)
303			{
304			if (IN6_IS_SCOPE_EMBED(in6)) {
305			in6->s6_addr[2] = 0;
306			in6->s6_addr[3] = 0;
307			}
308			}
309
310			void
311			sa2addr(struct sockaddr sa, int af, union eigrpd_addr *addr)
312			{
313			struct sockaddr_in sa_in = (struct sockaddr_in )sa;
314			struct sockaddr_in6 sa_in6 = (struct sockaddr_in6 )sa;
315
316			memset(addr, 0, sizeof(*addr));
317			switch (sa->sa_family) {
318			case AF_INET:
319			*af = AF_INET;
320			addr->v4 = sa_in->sin_addr;
321			break;
322			case AF_INET6:
323			*af = AF_INET6;
324			addr->v6 = sa_in6->sin6_addr;
325			break;
326			default:
327			fatalx("sa2addr: unknown af");
328			}
329			}