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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/net/inet_net_pton.c	Lines:	46	93	49.5 %
Date:	2017-11-07	Branches:	40	109	36.7 %


/*	$OpenBSD: inet_net_pton.c,v 1.10 2017/03/06 18:16:27 millert Exp $	*/

/*
 * Copyright (c) 2012 by Gilles Chehade <gilles@openbsd.org>
 * Copyright (c) 1996,1999 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 <assert.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

static int	inet_net_pton_ipv4(const char *, u_char *, size_t);
static int	inet_net_pton_ipv6(const char *, u_char *, size_t);

/*
 * static int
 * inet_net_pton(af, src, dst, size)
 *	convert network number from presentation to network format.
 *	accepts hex octets, hex strings, decimal octets, and /CIDR.
 *	"size" is in bytes and describes "dst".
 * return:
 *	number of bits, either imputed classfully or specified with /CIDR,
 *	or -1 if some failure occurred (check errno).  ENOENT means it was
 *	not a valid network specification.
 * author:
 *	Paul Vixie (ISC), June 1996
 */
int
inet_net_pton(int af, const char *src, void *dst, size_t size)
{
	switch (af) {
	case AF_INET:
		return (inet_net_pton_ipv4(src, dst, size));
	case AF_INET6:
		return (inet_net_pton_ipv6(src, dst, size));
	default:
		errno = EAFNOSUPPORT;
		return (-1);
	}
}

/*
 * static int
 * inet_net_pton_ipv4(src, dst, size)
 *	convert IPv4 network number from presentation to network format.
 *	accepts hex octets, hex strings, decimal octets, and /CIDR.
 *	"size" is in bytes and describes "dst".
 * return:
 *	number of bits, either imputed classfully or specified with /CIDR,
 *	or -1 if some failure occurred (check errno).  ENOENT means it was
 *	not an IPv4 network specification.
 * note:
 *	network byte order assumed.  this means 192.5.5.240/28 has
 *	0x11110000 in its fourth octet.
 * author:
 *	Paul Vixie (ISC), June 1996
 */
static int
inet_net_pton_ipv4(const char *src, u_char *dst, size_t size)
{
	static const char
		xdigits[] = "0123456789abcdef",
		digits[] = "0123456789";
	int n, ch, tmp, dirty, bits;
	const u_char *odst = dst;

	ch = (unsigned char)*src++;
	if (ch == '0' && (src[0] == 'x' || src[0] == 'X')
	    && isascii((unsigned char)src[1]) && isxdigit((unsigned char)src[1])) {
		/* Hexadecimal: Eat nybble string. */
		if (size == 0)
			goto emsgsize;
		tmp = 0, dirty = 0;
		src++;	/* skip x or X. */
		while ((ch = (unsigned char)*src++) != '\0' &&
		    isascii(ch) && isxdigit(ch)) {
			if (isupper(ch))
				ch = tolower(ch);
			n = strchr(xdigits, ch) - xdigits;
			assert(n >= 0 && n <= 15);
			if (dirty == 0)
				tmp = n;
			else
				tmp = (tmp << 4) | n;
			if (++dirty == 2) {
				if (size-- == 0)
					goto emsgsize;
				*dst++ = (u_char) tmp;
				dirty = 0;
			}
		}
		if (dirty) {  /* Odd trailing nybble? */
			if (size-- == 0)
				goto emsgsize;
			*dst++ = (u_char) (tmp << 4);
		}
	} else if (isascii(ch) && isdigit(ch)) {
		/* Decimal: eat dotted digit string. */
		for (;;) {
			tmp = 0;
			do {
				n = strchr(digits, ch) - digits;
				assert(n >= 0 && n <= 9);
				tmp *= 10;
				tmp += n;
				if (tmp > 255)
					goto enoent;
			} while ((ch = (unsigned char)*src++) != '\0' &&
				 isascii(ch) && isdigit(ch));
			if (size-- == 0)
				goto emsgsize;
			*dst++ = (u_char) tmp;
			if (ch == '\0' || ch == '/')
				break;
			if (ch != '.')
				goto enoent;
			ch = (unsigned char)*src++;
			if (!isascii(ch) || !isdigit(ch))
				goto enoent;
		}
	} else
		goto enoent;

	bits = -1;
	if (ch == '/' && isascii((unsigned char)src[0]) &&
	    isdigit((unsigned char)src[0]) && dst > odst) {
		/* CIDR width specifier.  Nothing can follow it. */
		ch = (unsigned char)*src++;	/* Skip over the /. */
		bits = 0;
		do {
			n = strchr(digits, ch) - digits;
			assert(n >= 0 && n <= 9);
			bits *= 10;
			bits += n;
			if (bits > 32)
				goto emsgsize;
		} while ((ch = (unsigned char)*src++) != '\0' &&
			 isascii(ch) && isdigit(ch));
		if (ch != '\0')
			goto enoent;
	}

	/* Firey death and destruction unless we prefetched EOS. */
	if (ch != '\0')
		goto enoent;

	/* If nothing was written to the destination, we found no address. */
	if (dst == odst)
		goto enoent;
	/* If no CIDR spec was given, infer width from net class. */
	if (bits == -1) {
		if (*odst >= 240)	/* Class E */
			bits = 32;
		else if (*odst >= 224)	/* Class D */
			bits = 4;
		else if (*odst >= 192)	/* Class C */
			bits = 24;
		else if (*odst >= 128)	/* Class B */
			bits = 16;
		else			/* Class A */
			bits = 8;
		/* If imputed mask is narrower than specified octets, widen. */
		if (bits < ((dst - odst) * 8))
			bits = (dst - odst) * 8;
	}
	/* Extend network to cover the actual mask. */
	while (bits > ((dst - odst) * 8)) {
		if (size-- == 0)
			goto emsgsize;
		*dst++ = '\0';
	}
	return (bits);

 enoent:
	errno = ENOENT;
	return (-1);

 emsgsize:
	errno = EMSGSIZE;
	return (-1);
}


static int
inet_net_pton_ipv6(const char *src, u_char *dst, size_t size)
{
	int	ret;
	int	bits;
	char	buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255:255:255:255/128")];
	char		*sep;
	const char	*errstr;

	if (strlcpy(buf, src, sizeof buf) >= sizeof buf) {
		errno = EMSGSIZE;
		return (-1);
	}

	sep = strchr(buf, '/');
	if (sep != NULL)
		*sep++ = '\0';

	ret = inet_pton(AF_INET6, buf, dst);
	if (ret != 1)
		return (-1);

	if (sep == NULL)
		return 128;

	bits = strtonum(sep, 0, 128, &errstr);
	if (errstr) {
		errno = EINVAL;
		return (-1);
	}

	return bits;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: inet_net_pton.c,v 1.10 2017/03/06 18:16:27 millert Exp $ */
2
3			/*
4			* Copyright (c) 2012 by Gilles Chehade <gilles@openbsd.org>
5			* Copyright (c) 1996,1999 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 <assert.h>
27			#include <ctype.h>
28			#include <errno.h>
29			#include <stdio.h>
30			#include <string.h>
31			#include <stdlib.h>
32
33			static int inet_net_pton_ipv4(const char , u_char , size_t);
34			static int inet_net_pton_ipv6(const char , u_char , size_t);
35
36			/*
37			* static int
38			* inet_net_pton(af, src, dst, size)
39			* convert network number from presentation to network format.
40			* accepts hex octets, hex strings, decimal octets, and /CIDR.
41			* "size" is in bytes and describes "dst".
42			* return:
43			* number of bits, either imputed classfully or specified with /CIDR,
44			* or -1 if some failure occurred (check errno). ENOENT means it was
45			* not a valid network specification.
46			* author:
47			* Paul Vixie (ISC), June 1996
48			*/
49			int
50			inet_net_pton(int af, const char src, void dst, size_t size)
51			{
52	✓✗✗	938	switch (af) {
53			case AF_INET:
54		469	return (inet_net_pton_ipv4(src, dst, size));
55			case AF_INET6:
56			return (inet_net_pton_ipv6(src, dst, size));
57			default:
58			errno = EAFNOSUPPORT;
59			return (-1);
60			}
61		469	}
62
63			/*
64			* static int
65			* inet_net_pton_ipv4(src, dst, size)
66			* convert IPv4 network number from presentation to network format.
67			* accepts hex octets, hex strings, decimal octets, and /CIDR.
68			* "size" is in bytes and describes "dst".
69			* return:
70			* number of bits, either imputed classfully or specified with /CIDR,
71			* or -1 if some failure occurred (check errno). ENOENT means it was
72			* not an IPv4 network specification.
73			* note:
74			* network byte order assumed. this means 192.5.5.240/28 has
75			* 0x11110000 in its fourth octet.
76			* author:
77			* Paul Vixie (ISC), June 1996
78			*/
79			static int
80			inet_net_pton_ipv4(const char src, u_char dst, size_t size)
81			{
82			static const char
83			xdigits[] = "0123456789abcdef",
84			digits[] = "0123456789";
85			int n, ch, tmp, dirty, bits;
86			const u_char *odst = dst;
87
88		938	ch = (unsigned char)*src++;
89	✗✓✗✗ ✗✗	469	if (ch == '0' && (src[0] == 'x' \|\| src[0] == 'X')
90			&& isascii((unsigned char)src[1]) && isxdigit((unsigned char)src[1])) {
91			/* Hexadecimal: Eat nybble string. */
92			if (size == 0)
93			goto emsgsize;
94			tmp = 0, dirty = 0;
95			src++; /* skip x or X. */
96			while ((ch = (unsigned char)*src++) != '\0' &&
97			isascii(ch) && isxdigit(ch)) {
98			if (isupper(ch))
99			ch = tolower(ch);
100			n = strchr(xdigits, ch) - xdigits;
101			assert(n >= 0 && n <= 15);
102			if (dirty == 0)
103			tmp = n;
104			else
105			tmp = (tmp << 4) \| n;
106			if (++dirty == 2) {
107			if (size-- == 0)
108			goto emsgsize;
109			*dst++ = (u_char) tmp;
110			dirty = 0;
111			}
112			}
113			if (dirty) { /* Odd trailing nybble? */
114			if (size-- == 0)
115			goto emsgsize;
116			*dst++ = (u_char) (tmp << 4);
117			}
118	✓✗✓✗	938	} else if (isascii(ch) && isdigit(ch)) {
119			/* Decimal: eat dotted digit string. */
120			for (;;) {
121			tmp = 0;
122		1690	do {
123		2486	n = strchr(digits, ch) - digits;
124	✗✓	2486	assert(n >= 0 && n <= 9);
125		2486	tmp *= 10;
126		2486	tmp += n;
127	✓✗	2486	if (tmp > 255)
128			goto enoent;
129	✓✓✓✓	4960	} while ((ch = (unsigned char)*src++) != '\0' &&
130	✓✗	4948	isascii(ch) && isdigit(ch));
131	✓✗	1690	if (size-- == 0)
132			goto emsgsize;
133		1690	*dst++ = (u_char) tmp;
134	✓✓	1690	if (ch == '\0' \|\| ch == '/')
135			break;
136	✓✗	1221	if (ch != '.')
137			goto enoent;
138		1221	ch = (unsigned char)*src++;
139	✓✗✓✗	2442	if (!isascii(ch) \|\| !isdigit(ch))
140			goto enoent;
141			}
142			} else
143			goto enoent;
144
145			bits = -1;
146	✓✓✓✗ ✓✗	1383	if (ch == '/' && isascii((unsigned char)src[0]) &&
147	✓✗	914	isdigit((unsigned char)src[0]) && dst > odst) {
148			/* CIDR width specifier. Nothing can follow it. */
149		457	ch = (unsigned char)src++; / Skip over the /. */
150			bits = 0;
151		457	do {
152		912	n = strchr(digits, ch) - digits;
153	✗✓	912	assert(n >= 0 && n <= 9);
154		912	bits *= 10;
155		912	bits += n;
156	✓✗	912	if (bits > 32)
157			goto emsgsize;
158	✓✓✓✗	1367	} while ((ch = (unsigned char)*src++) != '\0' &&
159	✓✗	910	isascii(ch) && isdigit(ch));
160	✓✗	457	if (ch != '\0')
161			goto enoent;
162			}
163
164			/* Firey death and destruction unless we prefetched EOS. */
165	✓✗	12	if (ch != '\0')
166			goto enoent;
167
168			/* If nothing was written to the destination, we found no address. */
169	✓✗	469	if (dst == odst)
170			goto enoent;
171			/* If no CIDR spec was given, infer width from net class. */
172	✓✓	469	if (bits == -1) {
173	✗✓	12	if (odst >= 240) / Class E */
174			bits = 32;
175	✗✓	12	else if (odst >= 224) / Class D */
176			bits = 4;
177	✓✗	12	else if (odst >= 192) / Class C */
178		12	bits = 24;
179			else if (odst >= 128) / Class B */
180			bits = 16;
181			else /* Class A */
182			bits = 8;
183			/* If imputed mask is narrower than specified octets, widen. */
184	✓✗	12	if (bits < ((dst - odst) * 8))
185		12	bits = (dst - odst) * 8;
186			}
187			/* Extend network to cover the actual mask. */
188	✓✓	485	while (bits > ((dst - odst) * 8)) {
189	✓✗	8	if (size-- == 0)
190			goto emsgsize;
191		8	*dst++ = '\0';
192			}
193		469	return (bits);
194
195			enoent:
196			errno = ENOENT;
197			return (-1);
198
199			emsgsize:
200			errno = EMSGSIZE;
201			return (-1);
202		469	}
203
204
205			static int
206			inet_net_pton_ipv6(const char src, u_char dst, size_t size)
207			{
208			int ret;
209			int bits;
210			char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255:255:255:255/128")];
211			char *sep;
212			const char *errstr;
213
214			if (strlcpy(buf, src, sizeof buf) >= sizeof buf) {
215			errno = EMSGSIZE;
216			return (-1);
217			}
218
219			sep = strchr(buf, '/');
220			if (sep != NULL)
221			*sep++ = '\0';
222
223			ret = inet_pton(AF_INET6, buf, dst);
224			if (ret != 1)
225			return (-1);
226
227			if (sep == NULL)
228			return 128;
229
230			bits = strtonum(sep, 0, 128, &errstr);
231			if (errstr) {
232			errno = EINVAL;
233			return (-1);
234			}
235
236			return bits;
237			}