1 /* Copyright (c) 1996 by Internet Software Consortium.
2 *
3 * Permission to use, copy, modify, and distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
6 *
7 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
8 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
9 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
10 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
11 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
12 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
13 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
14 * SOFTWARE.
15 */
16
17 #include "apr_private.h"
18 #include "apr_arch_networkio.h"
19
20 #if APR_HAVE_SYS_TYPES_H
21 #include <sys/types.h>
22 #endif
23 #if APR_HAVE_SYS_SOCKET_H
24 #include <sys/socket.h>
25 #endif
26 #if APR_HAVE_NETINET_IN_H
27 #include <netinet/in.h>
28 #endif
29 #if APR_HAVE_ARPA_INET_H
30 #include <arpa/inet.h>
31 #endif
32 #include <string.h>
33 #if APR_HAVE_ERRNO_H
34 #include <errno.h>
35 #endif
36
37 #ifndef IN6ADDRSZ
38 #define IN6ADDRSZ 16
39 #endif
40
41 #ifndef INT16SZ
42 #define INT16SZ sizeof(apr_int16_t)
43 #endif
44
45 #ifndef INADDRSZ
46 #define INADDRSZ 4
47 #endif
48
49 #ifndef __P
50 #define __P(x) x
51 #endif
52
53 #if !defined(EAFNOSUPPORT) && defined(WSAEAFNOSUPPORT)
54 #define EAFNOSUPPORT WSAEAFNOSUPPORT
55 #endif
56
57 /*
58 * WARNING: Don't even consider trying to compile this on a system where
59 * sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.
60 */
61
62 static int inet_pton4 __P((const char *src, unsigned char *dst));
63 #if APR_HAVE_IPV6
64 static int inet_pton6 __P((const char *src, unsigned char *dst));
65 #endif
66
67 /* int
68 * inet_pton(af, src, dst)
69 * convert from presentation format (which usually means ASCII printable)
70 * to network format (which is usually some kind of binary format).
71 * return:
72 * 1 if the address was valid for the specified address family
73 * 0 if the address wasn't valid (`dst' is untouched in this case)
74 * -1 if some other error occurred (`dst' is untouched in this case, too)
75 * author:
76 * Paul Vixie, 1996.
77 */
78 int
apr_inet_pton(int af,const char * src,void * dst)79 apr_inet_pton(int af, const char *src, void *dst)
80 {
81 switch (af) {
82 case AF_INET:
83 return (inet_pton4(src, dst));
84 #if APR_HAVE_IPV6
85 case AF_INET6:
86 return (inet_pton6(src, dst));
87 #endif
88 default:
89 errno = EAFNOSUPPORT;
90 return (-1);
91 }
92 /* NOTREACHED */
93 }
94
95 /* int
96 * inet_pton4(src, dst)
97 * like inet_aton() but without all the hexadecimal and shorthand.
98 * return:
99 * 1 if `src' is a valid dotted quad, else 0.
100 * notice:
101 * does not touch `dst' unless it's returning 1.
102 * author:
103 * Paul Vixie, 1996.
104 */
105 static int
inet_pton4(const char * src,unsigned char * dst)106 inet_pton4(const char *src, unsigned char *dst)
107 {
108 static const char digits[] = "0123456789";
109 int saw_digit, octets, ch;
110 unsigned char tmp[INADDRSZ], *tp;
111
112 saw_digit = 0;
113 octets = 0;
114 *(tp = tmp) = 0;
115 while ((ch = *src++) != '\0') {
116 const char *pch;
117
118 if ((pch = strchr(digits, ch)) != NULL) {
119 unsigned int new = *tp * 10 + (unsigned int)(pch - digits);
120
121 if (new > 255)
122 return (0);
123 *tp = new;
124 if (! saw_digit) {
125 if (++octets > 4)
126 return (0);
127 saw_digit = 1;
128 }
129 } else if (ch == '.' && saw_digit) {
130 if (octets == 4)
131 return (0);
132 *++tp = 0;
133 saw_digit = 0;
134 } else
135 return (0);
136 }
137 if (octets < 4)
138 return (0);
139
140 memcpy(dst, tmp, INADDRSZ);
141 return (1);
142 }
143
144 #if APR_HAVE_IPV6
145 /* int
146 * inet_pton6(src, dst)
147 * convert presentation level address to network order binary form.
148 * return:
149 * 1 if `src' is a valid [RFC1884 2.2] address, else 0.
150 * notice:
151 * (1) does not touch `dst' unless it's returning 1.
152 * (2) :: in a full address is silently ignored.
153 * credit:
154 * inspired by Mark Andrews.
155 * author:
156 * Paul Vixie, 1996.
157 */
158 static int
inet_pton6(const char * src,unsigned char * dst)159 inet_pton6(const char *src, unsigned char *dst)
160 {
161 static const char xdigits_l[] = "0123456789abcdef",
162 xdigits_u[] = "0123456789ABCDEF";
163 unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
164 const char *xdigits, *curtok;
165 int ch, saw_xdigit;
166 unsigned int val;
167
168 memset((tp = tmp), '\0', IN6ADDRSZ);
169 endp = tp + IN6ADDRSZ;
170 colonp = NULL;
171 /* Leading :: requires some special handling. */
172 if (*src == ':')
173 if (*++src != ':')
174 return (0);
175 curtok = src;
176 saw_xdigit = 0;
177 val = 0;
178 while ((ch = *src++) != '\0') {
179 const char *pch;
180
181 if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
182 pch = strchr((xdigits = xdigits_u), ch);
183 if (pch != NULL) {
184 val <<= 4;
185 val |= (pch - xdigits);
186 if (val > 0xffff)
187 return (0);
188 saw_xdigit = 1;
189 continue;
190 }
191 if (ch == ':') {
192 curtok = src;
193 if (!saw_xdigit) {
194 if (colonp)
195 return (0);
196 colonp = tp;
197 continue;
198 }
199 if (tp + INT16SZ > endp)
200 return (0);
201 *tp++ = (unsigned char) (val >> 8) & 0xff;
202 *tp++ = (unsigned char) val & 0xff;
203 saw_xdigit = 0;
204 val = 0;
205 continue;
206 }
207 if (ch == '.' && ((tp + INADDRSZ) <= endp) &&
208 inet_pton4(curtok, tp) > 0) {
209 tp += INADDRSZ;
210 saw_xdigit = 0;
211 break; /* '\0' was seen by inet_pton4(). */
212 }
213 return (0);
214 }
215 if (saw_xdigit) {
216 if (tp + INT16SZ > endp)
217 return (0);
218 *tp++ = (unsigned char) (val >> 8) & 0xff;
219 *tp++ = (unsigned char) val & 0xff;
220 }
221 if (colonp != NULL) {
222 /*
223 * Since some memmove()'s erroneously fail to handle
224 * overlapping regions, we'll do the shift by hand.
225 */
226 const apr_ssize_t n = tp - colonp;
227 apr_ssize_t i;
228
229 for (i = 1; i <= n; i++) {
230 endp[- i] = colonp[n - i];
231 colonp[n - i] = 0;
232 }
233 tp = endp;
234 }
235 if (tp != endp)
236 return (0);
237 memcpy(dst, tmp, IN6ADDRSZ);
238 return (1);
239 }
240 #endif
241