[mirror_edk2.git] / StdLib / BsdSocketLib / inet_net_ntop.c

/*\r
 * Copyright (c) 1996 by Internet Software Consortium.\r
 *\r
 * Permission to use, copy, modify, and distribute this software for any\r
 * purpose with or without fee is hereby granted, provided that the above\r
 * copyright notice and this permission notice appear in all copies.\r
 *\r
 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r
 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r
 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r
 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
 * SOFTWARE.\r
 */\r
\r
#if defined(LIBC_SCCS) && !defined(lint)\r
static const char orig_rcsid[] = "From Id: inet_net_ntop.c,v 8.2 1996/08/08 06:54:44 vixie Exp";\r
static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.1.1.1 2003/11/19 01:51:29 kyu3 Exp $";\r
#endif\r
\r
#include <sys/types.h>\r
#include <sys/socket.h>\r
#include <netinet/in.h>\r
#include <arpa/inet.h>\r
\r
#include <errno.h>\r
#include <stdio.h>\r
#include <string.h>\r
#include <stdlib.h>\r
\r
#ifdef SPRINTF_CHAR\r
# define SPRINTF(x) strlen(sprintf/**/x)\r
#else\r
# define SPRINTF(x) ((size_t)sprintf x)\r
#endif\r
\r
static char *	inet_net_ntop_ipv4 (const u_char *src, int bits,\r
					char *dst, size_t size);\r
\r
/*\r
 * char *\r
 * inet_net_ntop(af, src, bits, dst, size)\r
 *	convert network number from network to presentation format.\r
 *	generates CIDR style result always.\r
 * return:\r
 *	pointer to dst, or NULL if an error occurred (check errno).\r
 * author:\r
 *	Paul Vixie (ISC), July 1996\r
 */\r
char *\r
inet_net_ntop(\r
	int af,\r
	const void *src,\r
	int bits,\r
	char *dst,\r
	size_t size\r
	)\r
{\r
	switch (af) {\r
	case AF_INET:\r
		return (inet_net_ntop_ipv4(src, bits, dst, size));\r
	default:\r
		errno = EAFNOSUPPORT;\r
		return (NULL);\r
	}\r
}\r
\r
/*\r
 * static char *\r
 * inet_net_ntop_ipv4(src, bits, dst, size)\r
 *	convert IPv4 network number from network to presentation format.\r
 *	generates CIDR style result always.\r
 * return:\r
 *	pointer to dst, or NULL if an error occurred (check errno).\r
 * note:\r
 *	network byte order assumed.  this means 192.5.5.240/28 has\r
 *	0x11110000 in its fourth octet.\r
 * author:\r
 *	Paul Vixie (ISC), July 1996\r
 */\r
static char *\r
inet_net_ntop_ipv4(\r
	const u_char *src,\r
	int bits,\r
	char *dst,\r
	size_t size\r
	)\r
{\r
	char *odst = dst;\r
	char *t;\r
	u_int m;\r
	int b;\r
\r
	if (bits < 0 || bits > 32) {\r
		errno = EINVAL;\r
		return (NULL);\r
	}\r
	if (bits == 0) {\r
		if (size < sizeof "0")\r
			goto emsgsize;\r
		*dst++ = '0';\r
		*dst = '\0';\r
	}\r
\r
	/* Format whole octets. */\r
	for (b = bits / 8; b > 0; b--) {\r
		if (size < sizeof "255.")\r
			goto emsgsize;\r
		t = dst;\r
		dst += SPRINTF((dst, "%u", *src++));\r
		if (b > 1) {\r
			*dst++ = '.';\r
			*dst = '\0';\r
		}\r
		size -= (size_t)(dst - t);\r
	}\r
\r
	/* Format partial octet. */\r
	b = bits % 8;\r
	if (b > 0) {\r
		if (size < sizeof ".255")\r
			goto emsgsize;\r
		t = dst;\r
		if (dst != odst)\r
			*dst++ = '.';\r
		m = ((1 << b) - 1) << (8 - b);\r
		dst += SPRINTF((dst, "%u", ((unsigned int)(*src & m))));\r
		size -= (size_t)(dst - t);\r
	}\r
\r
	/* Format CIDR /width. */\r
	if (size < sizeof "/32")\r
		goto emsgsize;\r
	dst += SPRINTF((dst, "/%u", bits));\r
	return (odst);\r
\r
 emsgsize:\r
	errno = EMSGSIZE;\r
	return (NULL);\r
}\r
Commit	Line	Data
d7ce7006	1	/*\r
	2	* Copyright (c) 1996 by Internet Software Consortium.\r
	3	*\r
	4	* Permission to use, copy, modify, and distribute this software for any\r
	5	* purpose with or without fee is hereby granted, provided that the above\r
	6	* copyright notice and this permission notice appear in all copies.\r
	7	*\r
	8	* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS\r
	9	* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES\r
	10	* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE\r
	11	* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL\r
	12	* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR\r
	13	* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS\r
	14	* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS\r
	15	* SOFTWARE.\r
	16	*/\r
	17	\r
	18	#if defined(LIBC_SCCS) && !defined(lint)\r
	19	static const char orig_rcsid[] = "From Id: inet_net_ntop.c,v 8.2 1996/08/08 06:54:44 vixie Exp";\r
	20	static const char rcsid[] = "$Id: inet_net_ntop.c,v 1.1.1.1 2003/11/19 01:51:29 kyu3 Exp $";\r
	21	#endif\r
	22	\r
	23	#include <sys/types.h>\r
	24	#include <sys/socket.h>\r
	25	#include <netinet/in.h>\r
	26	#include <arpa/inet.h>\r
	27	\r
	28	#include <errno.h>\r
	29	#include <stdio.h>\r
	30	#include <string.h>\r
	31	#include <stdlib.h>\r
	32	\r
	33	#ifdef SPRINTF_CHAR\r
	34	# define SPRINTF(x) strlen(sprintf/**/x)\r
	35	#else\r
	36	# define SPRINTF(x) ((size_t)sprintf x)\r
	37	#endif\r
	38	\r
	39	static char * inet_net_ntop_ipv4 (const u_char *src, int bits,\r
	40	char *dst, size_t size);\r
	41	\r
	42	/*\r
	43	* char *\r
	44	* inet_net_ntop(af, src, bits, dst, size)\r
	45	* convert network number from network to presentation format.\r
	46	* generates CIDR style result always.\r
	47	* return:\r
	48	* pointer to dst, or NULL if an error occurred (check errno).\r
	49	* author:\r
	50	* Paul Vixie (ISC), July 1996\r
	51	*/\r
	52	char *\r
	53	inet_net_ntop(\r
	54	int af,\r
	55	const void *src,\r
	56	int bits,\r
	57	char *dst,\r
	58	size_t size\r
	59	)\r
	60	{\r
	61	switch (af) {\r
	62	case AF_INET:\r
	63	return (inet_net_ntop_ipv4(src, bits, dst, size));\r
	64	default:\r
65	errno = EAFNOSUPPORT;\r
66	return (NULL);\r
67	}\r
68	}\r
69	\r
70	/*\r
71	* static char *\r
72	* inet_net_ntop_ipv4(src, bits, dst, size)\r
73	* convert IPv4 network number from network to presentation format.\r
74	* generates CIDR style result always.\r
75	* return:\r
76	* pointer to dst, or NULL if an error occurred (check errno).\r
77	* note:\r
78	* network byte order assumed. this means 192.5.5.240/28 has\r
79	* 0x11110000 in its fourth octet.\r
80	* author:\r
81	* Paul Vixie (ISC), July 1996\r
82	*/\r
83	static char *\r
84	inet_net_ntop_ipv4(\r
85	const u_char *src,\r
86	int bits,\r
87	char *dst,\r
88	size_t size\r
89	)\r
90	{\r
91	char *odst = dst;\r
92	char *t;\r
93	u_int m;\r
94	int b;\r
95	\r
96	if (bits < 0 \|\| bits > 32) {\r
97	errno = EINVAL;\r
98	return (NULL);\r
99	}\r
100	if (bits == 0) {\r
101	if (size < sizeof "0")\r
102	goto emsgsize;\r
103	*dst++ = '0';\r
104	*dst = '\0';\r
105	}\r
106	\r
107	/* Format whole octets. */\r
108	for (b = bits / 8; b > 0; b--) {\r
109	if (size < sizeof "255.")\r
110	goto emsgsize;\r
111	t = dst;\r
112	dst += SPRINTF((dst, "%u", *src++));\r
113	if (b > 1) {\r
114	*dst++ = '.';\r
115	*dst = '\0';\r
116	}\r
117	size -= (size_t)(dst - t);\r
118	}\r
119	\r
120	/* Format partial octet. */\r
121	b = bits % 8;\r
122	if (b > 0) {\r
123	if (size < sizeof ".255")\r
124	goto emsgsize;\r
125	t = dst;\r
126	if (dst != odst)\r
127	*dst++ = '.';\r
128	m = ((1 << b) - 1) << (8 - b);\r
7700f0f5	129	dst += SPRINTF((dst, "%u", ((unsigned int)(*src & m))));\r
d7ce7006	130	size -= (size_t)(dst - t);\r
	131	}\r
	132	\r
	133	/* Format CIDR /width. */\r
	134	if (size < sizeof "/32")\r
	135	goto emsgsize;\r
	136	dst += SPRINTF((dst, "/%u", bits));\r
	137	return (odst);\r
	138	\r
	139	emsgsize:\r
	140	errno = EMSGSIZE;\r
	141	return (NULL);\r
	142	}\r