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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/net/rthdr.c	Lines:	0	60	0.0 %
Date:	2017-11-07	Branches:	0	30	0.0 %


/*	$OpenBSD: rthdr.c,v 1.12 2016/09/21 04:38:56 guenther Exp $	*/
/*	$KAME: rthdr.c,v 1.22 2006/02/09 08:18:58 keiichi Exp $	*/

/*
 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/socket.h>

#include <netinet/in.h>
#include <netinet/ip6.h>

#include <string.h>
#include <stdio.h>

/*
 * RFC3542 (2292bis) API
 */

socklen_t
inet6_rth_space(int type, int segments)
{
	switch (type) {
	case IPV6_RTHDR_TYPE_0:
		return (((segments * 2) + 1) << 3);
	default:
		return (0);	/* type not suppported */
	}
}
DEF_WEAK(inet6_rth_space);

void *
inet6_rth_init(void *bp, socklen_t bp_len, int type, int segments)
{
	struct ip6_rthdr *rth = (struct ip6_rthdr *)bp;
	struct ip6_rthdr0 *rth0;

	switch (type) {
	case IPV6_RTHDR_TYPE_0:
		/* length validation */
		if (bp_len < inet6_rth_space(IPV6_RTHDR_TYPE_0, segments))
			return (NULL);

		memset(bp, 0, bp_len);
		rth0 = (struct ip6_rthdr0 *)rth;
		rth0->ip6r0_len = segments * 2;
		rth0->ip6r0_type = IPV6_RTHDR_TYPE_0;
		rth0->ip6r0_segleft = 0;
		rth0->ip6r0_reserved = 0;
		break;
	default:
		return (NULL);	/* type not supported */
	}

	return (bp);
}

int
inet6_rth_add(void *bp, const struct in6_addr *addr)
{
	struct ip6_rthdr *rth = (struct ip6_rthdr *)bp;
	struct ip6_rthdr0 *rth0;
	struct in6_addr *nextaddr;

	switch (rth->ip6r_type) {
	case IPV6_RTHDR_TYPE_0:
		rth0 = (struct ip6_rthdr0 *)rth;
		nextaddr = (struct in6_addr *)(rth0 + 1) + rth0->ip6r0_segleft;
		*nextaddr = *addr;
		rth0->ip6r0_segleft++;
		break;
	default:
		return (-1);	/* type not supported */
	}

	return (0);
}

int
inet6_rth_reverse(const void *in, void *out)
{
	struct ip6_rthdr *rth_in = (struct ip6_rthdr *)in;
	struct ip6_rthdr0 *rth0_in, *rth0_out;
	int i, segments;

	switch (rth_in->ip6r_type) {
	case IPV6_RTHDR_TYPE_0:
		rth0_in = (struct ip6_rthdr0 *)in;
		rth0_out = (struct ip6_rthdr0 *)out;

		/* parameter validation XXX too paranoid? */
		if (rth0_in->ip6r0_len % 2)
			return (-1);
		segments = rth0_in->ip6r0_len / 2;

		/* we can't use memcpy here, since in and out may overlap */
		memmove(rth0_out, rth0_in, ((rth0_in->ip6r0_len) + 1) << 3);
		rth0_out->ip6r0_segleft = segments;

		/* reverse the addresses */
		for (i = 0; i < segments / 2; i++) {
			struct in6_addr addr_tmp, *addr1, *addr2;

			addr1 = (struct in6_addr *)(rth0_out + 1) + i;
			addr2 = (struct in6_addr *)(rth0_out + 1) +
			    (segments - i - 1);
			addr_tmp = *addr1;
			*addr1 = *addr2;
			*addr2 = addr_tmp;
		}

		break;
	default:
		return (-1);	/* type not supported */
	}

	return (0);
}

int
inet6_rth_segments(const void *bp)
{
	struct ip6_rthdr *rh = (struct ip6_rthdr *)bp;
	struct ip6_rthdr0 *rh0;
	int addrs;

	switch (rh->ip6r_type) {
	case IPV6_RTHDR_TYPE_0:
		rh0 = (struct ip6_rthdr0 *)bp;

		/*
		 * Validation for a type-0 routing header.
		 * Is this too strict?
		 */
		if ((rh0->ip6r0_len % 2) != 0 ||
		    (addrs = (rh0->ip6r0_len >> 1)) < rh0->ip6r0_segleft)
			return (-1);

		return (addrs);
	default:
		return (-1);	/* unknown type */
	}
}

struct in6_addr *
inet6_rth_getaddr(const void *bp, int idx)
{
	struct ip6_rthdr *rh = (struct ip6_rthdr *)bp;
	struct ip6_rthdr0 *rh0;
	int addrs;

	switch (rh->ip6r_type) {
	case IPV6_RTHDR_TYPE_0:
		 rh0 = (struct ip6_rthdr0 *)bp;

		/*
		 * Validation for a type-0 routing header.
		 * Is this too strict?
		 */
		if ((rh0->ip6r0_len % 2) != 0 ||
		    (addrs = (rh0->ip6r0_len >> 1)) < rh0->ip6r0_segleft)
			return (NULL);

		if (idx < 0 || addrs <= idx)
			return (NULL);

		return (((struct in6_addr *)(rh0 + 1)) + idx);
	default:
		return (NULL);	/* unknown type */
		break;
	}
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: rthdr.c,v 1.12 2016/09/21 04:38:56 guenther Exp $ */
2			/* $KAME: rthdr.c,v 1.22 2006/02/09 08:18:58 keiichi Exp $ */
3
4			/*
5			* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6			* All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the project nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			#include <sys/types.h>
34			#include <sys/socket.h>
35
36			#include <netinet/in.h>
37			#include <netinet/ip6.h>
38
39			#include <string.h>
40			#include <stdio.h>
41
42			/*
43			* RFC3542 (2292bis) API
44			*/
45
46			socklen_t
47			inet6_rth_space(int type, int segments)
48			{
49			switch (type) {
50			case IPV6_RTHDR_TYPE_0:
51			return (((segments * 2) + 1) << 3);
52			default:
53			return (0); /* type not suppported */
54			}
55			}
56			DEF_WEAK(inet6_rth_space);
57
58			void *
59			inet6_rth_init(void *bp, socklen_t bp_len, int type, int segments)
60			{
61			struct ip6_rthdr rth = (struct ip6_rthdr )bp;
62			struct ip6_rthdr0 *rth0;
63
64			switch (type) {
65			case IPV6_RTHDR_TYPE_0:
66			/* length validation */
67			if (bp_len < inet6_rth_space(IPV6_RTHDR_TYPE_0, segments))
68			return (NULL);
69
70			memset(bp, 0, bp_len);
71			rth0 = (struct ip6_rthdr0 *)rth;
72			rth0->ip6r0_len = segments * 2;
73			rth0->ip6r0_type = IPV6_RTHDR_TYPE_0;
74			rth0->ip6r0_segleft = 0;
75			rth0->ip6r0_reserved = 0;
76			break;
77			default:
78			return (NULL); /* type not supported */
79			}
80
81			return (bp);
82			}
83
84			int
85			inet6_rth_add(void bp, const struct in6_addr addr)
86			{
87			struct ip6_rthdr rth = (struct ip6_rthdr )bp;
88			struct ip6_rthdr0 *rth0;
89			struct in6_addr *nextaddr;
90
91			switch (rth->ip6r_type) {
92			case IPV6_RTHDR_TYPE_0:
93			rth0 = (struct ip6_rthdr0 *)rth;
94			nextaddr = (struct in6_addr *)(rth0 + 1) + rth0->ip6r0_segleft;
95			nextaddr = addr;
96			rth0->ip6r0_segleft++;
97			break;
98			default:
99			return (-1); /* type not supported */
100			}
101
102			return (0);
103			}
104
105			int
106			inet6_rth_reverse(const void in, void out)
107			{
108			struct ip6_rthdr rth_in = (struct ip6_rthdr )in;
109			struct ip6_rthdr0 rth0_in, rth0_out;
110			int i, segments;
111
112			switch (rth_in->ip6r_type) {
113			case IPV6_RTHDR_TYPE_0:
114			rth0_in = (struct ip6_rthdr0 *)in;
115			rth0_out = (struct ip6_rthdr0 *)out;
116
117			/* parameter validation XXX too paranoid? */
118			if (rth0_in->ip6r0_len % 2)
119			return (-1);
120			segments = rth0_in->ip6r0_len / 2;
121
122			/* we can't use memcpy here, since in and out may overlap */
123			memmove(rth0_out, rth0_in, ((rth0_in->ip6r0_len) + 1) << 3);
124			rth0_out->ip6r0_segleft = segments;
125
126			/* reverse the addresses */
127			for (i = 0; i < segments / 2; i++) {
128			struct in6_addr addr_tmp, addr1, addr2;
129
130			addr1 = (struct in6_addr *)(rth0_out + 1) + i;
131			addr2 = (struct in6_addr *)(rth0_out + 1) +
132			(segments - i - 1);
133			addr_tmp = *addr1;
134			addr1 = addr2;
135			*addr2 = addr_tmp;
136			}
137
138			break;
139			default:
140			return (-1); /* type not supported */
141			}
142
143			return (0);
144			}
145
146			int
147			inet6_rth_segments(const void *bp)
148			{
149			struct ip6_rthdr rh = (struct ip6_rthdr )bp;
150			struct ip6_rthdr0 *rh0;
151			int addrs;
152
153			switch (rh->ip6r_type) {
154			case IPV6_RTHDR_TYPE_0:
155			rh0 = (struct ip6_rthdr0 *)bp;
156
157			/*
158			* Validation for a type-0 routing header.
159			* Is this too strict?
160			*/
161			if ((rh0->ip6r0_len % 2) != 0 \|\|
162			(addrs = (rh0->ip6r0_len >> 1)) < rh0->ip6r0_segleft)
163			return (-1);
164
165			return (addrs);
166			default:
167			return (-1); /* unknown type */
168			}
169			}
170
171			struct in6_addr *
172			inet6_rth_getaddr(const void *bp, int idx)
173			{
174			struct ip6_rthdr rh = (struct ip6_rthdr )bp;
175			struct ip6_rthdr0 *rh0;
176			int addrs;
177
178			switch (rh->ip6r_type) {
179			case IPV6_RTHDR_TYPE_0:
180			rh0 = (struct ip6_rthdr0 *)bp;
181
182			/*
183			* Validation for a type-0 routing header.
184			* Is this too strict?
185			*/
186			if ((rh0->ip6r0_len % 2) != 0 \|\|
187			(addrs = (rh0->ip6r0_len >> 1)) < rh0->ip6r0_segleft)
188			return (NULL);
189
190			if (idx < 0 \|\| addrs <= idx)
191			return (NULL);
192
193			return (((struct in6_addr *)(rh0 + 1)) + idx);
194			default:
195			return (NULL); /* unknown type */
196			break;
197			}
198			}