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Commit | Line | Data |
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e685e07d UD |
1 | /* |
2 | * Copyright (c) 1996,1999 by Internet Software Consortium. | |
fa0bc87c RM |
3 | * |
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. | |
7 | * | |
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 | |
15 | * SOFTWARE. | |
16 | */ | |
17 | ||
fa0bc87c RM |
18 | #include <sys/param.h> |
19 | #include <sys/types.h> | |
20 | #include <sys/socket.h> | |
21 | #include <netinet/in.h> | |
22 | #include <arpa/inet.h> | |
23 | #include <arpa/nameser.h> | |
8a40ed68 | 24 | #include <ctype.h> |
fa0bc87c RM |
25 | #include <string.h> |
26 | #include <errno.h> | |
fa0bc87c | 27 | |
d53b8652 FW |
28 | static int inet_pton4 (const char *src, unsigned char *dst); |
29 | static int inet_pton6 (const char *src, unsigned char *dst); | |
fa0bc87c | 30 | |
d53b8652 FW |
31 | /* Convert from presentation format (which usually means ASCII printable) |
32 | * to network format (which is usually some kind of binary format). | |
33 | * | |
fa0bc87c | 34 | * return: |
d53b8652 FW |
35 | * 1 if the address was valid for the specified address family |
36 | * 0 if the address wasn't valid (`dst' is untouched in this case) | |
37 | * -1 if some other error occurred (`dst' is untouched in this case, too) | |
fa0bc87c | 38 | * author: |
d53b8652 | 39 | * Paul Vixie, 1996. |
fa0bc87c RM |
40 | */ |
41 | int | |
9d46370c | 42 | __inet_pton (int af, const char *src, void *dst) |
fa0bc87c | 43 | { |
d53b8652 FW |
44 | switch (af) |
45 | { | |
46 | case AF_INET: | |
47 | return inet_pton4 (src, dst); | |
48 | case AF_INET6: | |
49 | return inet_pton6 (src, dst); | |
50 | default: | |
51 | __set_errno (EAFNOSUPPORT); | |
52 | return -1; | |
53 | } | |
fa0bc87c | 54 | } |
8ac5a76a JM |
55 | libc_hidden_def (__inet_pton) |
56 | weak_alias (__inet_pton, inet_pton) | |
57 | libc_hidden_weak (inet_pton) | |
fa0bc87c | 58 | |
d53b8652 FW |
59 | /* Like inet_atonbut without all the hexadecimal, octal and shorthand. |
60 | * | |
fa0bc87c | 61 | * return: |
d53b8652 | 62 | * 1 if `src' is a valid dotted quad, else 0. |
fa0bc87c | 63 | * notice: |
d53b8652 | 64 | * does not touch `dst' unless it's returning 1. |
fa0bc87c | 65 | * author: |
d53b8652 | 66 | * Paul Vixie, 1996. |
fa0bc87c RM |
67 | */ |
68 | static int | |
d53b8652 | 69 | inet_pton4 (const char *src, unsigned char *dst) |
fa0bc87c | 70 | { |
d53b8652 FW |
71 | int saw_digit, octets, ch; |
72 | unsigned char tmp[NS_INADDRSZ], *tp; | |
fa0bc87c | 73 | |
d53b8652 FW |
74 | saw_digit = 0; |
75 | octets = 0; | |
76 | *(tp = tmp) = 0; | |
77 | while ((ch = *src++) != '\0') | |
78 | { | |
79 | if (ch >= '0' && ch <= '9') | |
80 | { | |
81 | unsigned int new = *tp * 10 + (ch - '0'); | |
fa0bc87c | 82 | |
d53b8652 FW |
83 | if (saw_digit && *tp == 0) |
84 | return 0; | |
85 | if (new > 255) | |
86 | return 0; | |
87 | *tp = new; | |
88 | if (! saw_digit) | |
89 | { | |
90 | if (++octets > 4) | |
91 | return 0; | |
92 | saw_digit = 1; | |
93 | } | |
94 | } | |
95 | else if (ch == '.' && saw_digit) | |
96 | { | |
97 | if (octets == 4) | |
98 | return 0; | |
99 | *++tp = 0; | |
100 | saw_digit = 0; | |
101 | } | |
102 | else | |
103 | return 0; | |
104 | } | |
105 | if (octets < 4) | |
106 | return 0; | |
107 | memcpy (dst, tmp, NS_INADDRSZ); | |
108 | return 1; | |
fa0bc87c RM |
109 | } |
110 | ||
d53b8652 FW |
111 | /* Cconvert presentation level address to network order binary form. |
112 | * | |
fa0bc87c | 113 | * return: |
d53b8652 | 114 | * 1 if `src' is a valid [RFC1884 2.2] address, else 0. |
fa0bc87c | 115 | * notice: |
d53b8652 FW |
116 | * (1) does not touch `dst' unless it's returning 1. |
117 | * (2) :: in a full address is silently ignored. | |
fa0bc87c | 118 | * credit: |
d53b8652 | 119 | * inspired by Mark Andrews. |
fa0bc87c | 120 | * author: |
d53b8652 | 121 | * Paul Vixie, 1996. |
fa0bc87c RM |
122 | */ |
123 | static int | |
d53b8652 | 124 | inet_pton6 (const char *src, unsigned char *dst) |
fa0bc87c | 125 | { |
d53b8652 FW |
126 | static const char xdigits[] = "0123456789abcdef"; |
127 | unsigned char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp; | |
128 | const char *curtok; | |
129 | int ch, saw_xdigit; | |
130 | unsigned int val; | |
fa0bc87c | 131 | |
d53b8652 FW |
132 | tp = memset (tmp, '\0', NS_IN6ADDRSZ); |
133 | endp = tp + NS_IN6ADDRSZ; | |
134 | colonp = NULL; | |
135 | /* Leading :: requires some special handling. */ | |
136 | if (*src == ':') | |
137 | if (*++src != ':') | |
138 | return 0; | |
139 | curtok = src; | |
140 | saw_xdigit = 0; | |
141 | val = 0; | |
142 | while ((ch = tolower (*src++)) != '\0') | |
143 | { | |
144 | const char *pch; | |
fa0bc87c | 145 | |
d53b8652 FW |
146 | pch = strchr (xdigits, ch); |
147 | if (pch != NULL) | |
148 | { | |
149 | val <<= 4; | |
150 | val |= (pch - xdigits); | |
151 | if (val > 0xffff) | |
152 | return 0; | |
153 | saw_xdigit = 1; | |
154 | continue; | |
155 | } | |
156 | if (ch == ':') | |
157 | { | |
158 | curtok = src; | |
159 | if (!saw_xdigit) | |
160 | { | |
161 | if (colonp) | |
162 | return 0; | |
163 | colonp = tp; | |
164 | continue; | |
165 | } | |
166 | else if (*src == '\0') | |
167 | { | |
168 | return 0; | |
169 | } | |
170 | if (tp + NS_INT16SZ > endp) | |
171 | return 0; | |
172 | *tp++ = (unsigned char) (val >> 8) & 0xff; | |
173 | *tp++ = (unsigned char) val & 0xff; | |
174 | saw_xdigit = 0; | |
175 | val = 0; | |
176 | continue; | |
fa0bc87c | 177 | } |
d53b8652 FW |
178 | if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) && |
179 | inet_pton4 (curtok, tp) > 0) | |
180 | { | |
181 | tp += NS_INADDRSZ; | |
182 | saw_xdigit = 0; | |
183 | break; /* '\0' was seen by inet_pton4. */ | |
fa0bc87c | 184 | } |
d53b8652 FW |
185 | return 0; |
186 | } | |
187 | if (saw_xdigit) | |
188 | { | |
189 | if (tp + NS_INT16SZ > endp) | |
190 | return 0; | |
191 | *tp++ = (unsigned char) (val >> 8) & 0xff; | |
192 | *tp++ = (unsigned char) val & 0xff; | |
193 | } | |
194 | if (colonp != NULL) | |
195 | { | |
196 | /* | |
197 | * Since some memmove's erroneously fail to handle | |
198 | * overlapping regions, we'll do the shift by hand. | |
199 | */ | |
200 | const int n = tp - colonp; | |
201 | int i; | |
fa0bc87c | 202 | |
d53b8652 FW |
203 | if (tp == endp) |
204 | return 0; | |
205 | for (i = 1; i <= n; i++) | |
206 | { | |
207 | endp[- i] = colonp[n - i]; | |
208 | colonp[n - i] = 0; | |
fa0bc87c | 209 | } |
d53b8652 FW |
210 | tp = endp; |
211 | } | |
212 | if (tp != endp) | |
213 | return 0; | |
214 | memcpy (dst, tmp, NS_IN6ADDRSZ); | |
215 | return 1; | |
fa0bc87c | 216 | } |