2 * Copyright (c) 1996 by Internet Software Consortium.
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
18 #if defined(LIBC_SCCS) && !defined(lint)
19 static const char rcsid[] = "$Id$";
22 #include <sys/types.h>
23 #include <sys/socket.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
35 # define SPRINTF(x) strlen(sprintf/**/x)
37 # define SPRINTF(x) ((size_t)sprintf x)
40 static int inet_net_pton_ipv4 __P((const char *src, u_char *dst,
45 * inet_net_pton(af, src, dst, size)
46 * convert network number from presentation to network format.
47 * accepts hex octets, hex strings, decimal octets, and /CIDR.
48 * "size" is in bytes and describes "dst".
50 * number of bits, either imputed classfully or specified with /CIDR,
51 * or -1 if some failure occurred (check errno). ENOENT means it was
52 * not a valid network specification.
54 * Paul Vixie (ISC), June 1996
57 inet_net_pton(af, src, dst, size)
65 return (inet_net_pton_ipv4(src, dst, size));
74 * inet_net_pton_ipv4(src, dst, size)
75 * convert IPv4 network number from presentation to network format.
76 * accepts hex octets, hex strings, decimal octets, and /CIDR.
77 * "size" is in bytes and describes "dst".
79 * number of bits, either imputed classfully or specified with /CIDR,
80 * or -1 if some failure occurred (check errno). ENOENT means it was
81 * not an IPv4 network specification.
83 * network byte order assumed. this means 192.5.5.240/28 has
84 * 0x11110000 in its fourth octet.
86 * Paul Vixie (ISC), June 1996
89 inet_net_pton_ipv4(src, dst, size)
95 xdigits[] = "0123456789abcdef",
96 digits[] = "0123456789";
97 int n, ch, tmp, dirty, bits;
98 const u_char *odst = dst;
103 if (ch == '0' && (src[0] == 'x' || src[0] == 'X')
104 && isascii(src[1]) && isxdigit(src[1])) {
105 /* Hexadecimal: Eat nybble string. */
109 src++; /* skip x or X. */
110 while ((ch = *src++) != '\0' &&
111 isascii(ch) && isxdigit(ch)) {
114 n = strchr(xdigits, ch) - xdigits;
115 assert(n >= 0 && n <= 15);
120 *++dst = 0, dirty = 0;
126 } else if (isascii(ch) && isdigit(ch)) {
127 /* Decimal: eat dotted digit string. */
131 n = strchr(digits, ch) - digits;
132 assert(n >= 0 && n <= 9);
137 } while ((ch = *src++) != '\0' &&
138 isascii(ch) && isdigit(ch));
141 *dst++ = (u_char) tmp;
142 if (ch == '\0' || ch == '/')
147 if (!isascii(ch) || !isdigit(ch))
153 if (ch == '/' && isascii(src[0]) && isdigit(src[0]) && dst > odst) {
154 /* CIDR width specifier. Nothing can follow it. */
155 ch = *src++; /* Skip over the /. */
158 n = strchr(digits, ch) - digits;
159 assert(n >= 0 && n <= 9);
162 } while ((ch = *src++) != '\0' &&
163 isascii(ch) && isdigit(ch));
168 /* Firey death and destruction unless we prefetched EOS. */
172 /* If nothing was written to the destination, we found no address. */
175 /* If no CIDR spec was given, infer width from net class. */
179 else if (*odst >= 192)
181 else if (*odst >= 128)
186 /* Extend network to cover the actual mask. */
187 while (bits > ((dst - odst) * 8)) {