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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/net/inet_net_ntop.c	Lines:	0	49	0.0 %
Date:	2017-11-13	Branches:	0	47	0.0 %


/*	$OpenBSD: inet_net_ntop.c,v 1.8 2015/05/14 11:52:43 jsg Exp $	*/

/*
 * Copyright (c) 2012 by Gilles Chehade <gilles@openbsd.org>
 * Copyright (c) 1996 by Internet Software Consortium.
 *
 * 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
 * CONSORTIUM 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 <netinet/in.h>
#include <arpa/inet.h>

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

static char *inet_net_ntop_ipv4(const u_char *, int, char *, size_t);
static char *inet_net_ntop_ipv6(const u_char *, int, char *, size_t);

/*
 * char *
 * inet_net_ntop(af, src, bits, dst, size)
 *	convert network number from network to presentation format.
 *	generates CIDR style result always.
 * return:
 *	pointer to dst, or NULL if an error occurred (check errno).
 * author:
 *	Paul Vixie (ISC), July 1996
 */
char *
inet_net_ntop(int af, const void *src, int bits, char *dst, size_t size)
{
	switch (af) {
	case AF_INET:
		return (inet_net_ntop_ipv4(src, bits, dst, size));
	case AF_INET6:
		return (inet_net_ntop_ipv6(src, bits, dst, size));
	default:
		errno = EAFNOSUPPORT;
		return (NULL);
	}
}

/*
 * static char *
 * inet_net_ntop_ipv4(src, bits, dst, size)
 *	convert IPv4 network number from network to presentation format.
 *	generates CIDR style result always.
 * return:
 *	pointer to dst, or NULL if an error occurred (check errno).
 * note:
 *	network byte order assumed.  this means 192.5.5.240/28 has
 *	0x11110000 in its fourth octet.
 * author:
 *	Paul Vixie (ISC), July 1996
 */
static char *
inet_net_ntop_ipv4(const u_char *src, int bits, char *dst, size_t size)
{
	char *odst = dst;
	u_int m;
	int b;
	char *ep;
	int advance;

	ep = dst + size;
	if (ep <= dst)
		goto emsgsize;

	if (bits < 0 || bits > 32) {
		errno = EINVAL;
		return (NULL);
	}
	if (bits == 0) {
		if (ep - dst < sizeof "0")
			goto emsgsize;
		*dst++ = '0';
		*dst = '\0';
	}

	/* Format whole octets. */
	for (b = bits / 8; b > 0; b--) {
		if (ep - dst < sizeof "255.")
			goto emsgsize;
		advance = snprintf(dst, ep - dst, "%u", *src++);
		if (advance <= 0 || advance >= ep - dst)
			goto emsgsize;
		dst += advance;
		if (b > 1) {
			if (dst + 1 >= ep)
				goto emsgsize;
			*dst++ = '.';
			*dst = '\0';
		}
	}

	/* Format partial octet. */
	b = bits % 8;
	if (b > 0) {
		if (ep - dst < sizeof ".255")
			goto emsgsize;
		if (dst != odst)
			*dst++ = '.';
		m = ((1 << b) - 1) << (8 - b);
		advance = snprintf(dst, ep - dst, "%u", *src & m);
		if (advance <= 0 || advance >= ep - dst)
			goto emsgsize;
		dst += advance;
	}

	/* Format CIDR /width. */
	if (ep - dst < sizeof "/32")
		goto emsgsize;
	advance = snprintf(dst, ep - dst, "/%u", bits);
	if (advance <= 0 || advance >= ep - dst)
		goto emsgsize;
	dst += advance;
	return (odst);

 emsgsize:
	errno = EMSGSIZE;
	return (NULL);
}

static char *
inet_net_ntop_ipv6(const u_char *src, int bits, char *dst, size_t size)
{
	int	ret;
	char	buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255:255:255:255/128")];

	if (bits < 0 || bits > 128) {
		errno = EINVAL;
		return (NULL);
	}

	if (inet_ntop(AF_INET6, src, buf, size) == NULL)
		return (NULL);

	ret = snprintf(dst, size, "%s/%d", buf, bits);
	if (ret == -1 || ret >= size) {
		errno = EMSGSIZE;
		return (NULL);
	}

	return (dst);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: inet_net_ntop.c,v 1.8 2015/05/14 11:52:43 jsg Exp $ */
2
3			/*
4			* Copyright (c) 2012 by Gilles Chehade <gilles@openbsd.org>
5			* Copyright (c) 1996 by Internet Software Consortium.
6			*
7			* Permission to use, copy, modify, and distribute this software for any
8			* purpose with or without fee is hereby granted, provided that the above
9			* copyright notice and this permission notice appear in all copies.
10			*
11			* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
12			* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
13			* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
14			* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
15			* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
16			* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
17			* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
18			* SOFTWARE.
19			*/
20
21			#include <sys/types.h>
22			#include <sys/socket.h>
23			#include <netinet/in.h>
24			#include <arpa/inet.h>
25
26			#include <errno.h>
27			#include <stdio.h>
28			#include <string.h>
29			#include <stdlib.h>
30
31			static char inet_net_ntop_ipv4(const u_char , int, char *, size_t);
32			static char inet_net_ntop_ipv6(const u_char , int, char *, size_t);
33
34			/*
35			* char *
36			* inet_net_ntop(af, src, bits, dst, size)
37			* convert network number from network to presentation format.
38			* generates CIDR style result always.
39			* return:
40			* pointer to dst, or NULL if an error occurred (check errno).
41			* author:
42			* Paul Vixie (ISC), July 1996
43			*/
44			char *
45			inet_net_ntop(int af, const void src, int bits, char dst, size_t size)
46			{
47			switch (af) {
48			case AF_INET:
49			return (inet_net_ntop_ipv4(src, bits, dst, size));
50			case AF_INET6:
51			return (inet_net_ntop_ipv6(src, bits, dst, size));
52			default:
53			errno = EAFNOSUPPORT;
54			return (NULL);
55			}
56			}
57
58			/*
59			* static char *
60			* inet_net_ntop_ipv4(src, bits, dst, size)
61			* convert IPv4 network number from network to presentation format.
62			* generates CIDR style result always.
63			* return:
64			* pointer to dst, or NULL if an error occurred (check errno).
65			* note:
66			* network byte order assumed. this means 192.5.5.240/28 has
67			* 0x11110000 in its fourth octet.
68			* author:
69			* Paul Vixie (ISC), July 1996
70			*/
71			static char *
72			inet_net_ntop_ipv4(const u_char src, int bits, char dst, size_t size)
73			{
74			char *odst = dst;
75			u_int m;
76			int b;
77			char *ep;
78			int advance;
79
80			ep = dst + size;
81			if (ep <= dst)
82			goto emsgsize;
83
84			if (bits < 0 \|\| bits > 32) {
85			errno = EINVAL;
86			return (NULL);
87			}
88			if (bits == 0) {
89			if (ep - dst < sizeof "0")
90			goto emsgsize;
91			*dst++ = '0';
92			*dst = '\0';
93			}
94
95			/* Format whole octets. */
96			for (b = bits / 8; b > 0; b--) {
97			if (ep - dst < sizeof "255.")
98			goto emsgsize;
99			advance = snprintf(dst, ep - dst, "%u", *src++);
100			if (advance <= 0 \|\| advance >= ep - dst)
101			goto emsgsize;
102			dst += advance;
103			if (b > 1) {
104			if (dst + 1 >= ep)
105			goto emsgsize;
106			*dst++ = '.';
107			*dst = '\0';
108			}
109			}
110
111			/* Format partial octet. */
112			b = bits % 8;
113			if (b > 0) {
114			if (ep - dst < sizeof ".255")
115			goto emsgsize;
116			if (dst != odst)
117			*dst++ = '.';
118			m = ((1 << b) - 1) << (8 - b);
119			advance = snprintf(dst, ep - dst, "%u", *src & m);
120			if (advance <= 0 \|\| advance >= ep - dst)
121			goto emsgsize;
122			dst += advance;
123			}
124
125			/* Format CIDR /width. */
126			if (ep - dst < sizeof "/32")
127			goto emsgsize;
128			advance = snprintf(dst, ep - dst, "/%u", bits);
129			if (advance <= 0 \|\| advance >= ep - dst)
130			goto emsgsize;
131			dst += advance;
132			return (odst);
133
134			emsgsize:
135			errno = EMSGSIZE;
136			return (NULL);
137			}
138
139			static char *
140			inet_net_ntop_ipv6(const u_char src, int bits, char dst, size_t size)
141			{
142			int ret;
143			char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255:255:255:255/128")];
144
145			if (bits < 0 \|\| bits > 128) {
146			errno = EINVAL;
147			return (NULL);
148			}
149
150			if (inet_ntop(AF_INET6, src, buf, size) == NULL)
151			return (NULL);
152
153			ret = snprintf(dst, size, "%s/%d", buf, bits);
154			if (ret == -1 \|\| ret >= size) {
155			errno = EMSGSIZE;
156			return (NULL);
157			}
158
159			return (dst);
160			}