URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [linux/] [uClibc/] [libc/] [inet/] [ntop.c] - Blame information for rev 1765

Details | Compare with Previous | View Log


/*
 * 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.
 */
 
#define __FORCE_GLIBC
#include <features.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
 
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
 
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
 
 
/*
 * WARNING: Don't even consider trying to compile this on a system where
 * sizeof(int) < 4.  sizeof(int) > 4 is fine; all the world's not a VAX.
 */
 
 
/* const char *
 * inet_ntop4(src, dst, size)
 *      format an IPv4 address
 * return:
 *      `dst' (as a const)
 * notes:
 *      (1) uses no statics
 *      (2) takes a u_char* not an in_addr as input
 * author:
 *      Paul Vixie, 1996.
 */
static const char *
inet_ntop4(const u_char *src, char *dst, size_t size)
{
        char tmp[sizeof ("255.255.255.255") + 1] = "\0";
        int octet;
        int i;
 
        i = 0;
        for (octet = 0; octet <= 3; octet++) {
 
                if (src[octet] > 255) {
                        __set_errno (ENOSPC);
                        return (NULL);
                }
                tmp[i++] = '0' + src[octet] / 100;
                if (tmp[i - 1] == '0') {
                        tmp[i - 1] = '0' + (src[octet] / 10 % 10);
                        if (tmp[i - 1] == '0') i--;
                } else {
                        tmp[i++] = '0' + (src[octet] / 10 % 10);
                }
                tmp[i++] = '0' + src[octet] % 10;
                tmp[i++] = '.';
        }
        tmp[i - 1] = '\0';
 
        if (strlen (tmp) > size) {
                __set_errno (ENOSPC);
                return (NULL);
        }
 
        return strcpy(dst, tmp);
}
 
 
/* const char *
 * inet_ntop6(src, dst, size)
 *      convert IPv6 binary address into presentation (printable) format
 * author:
 *      Paul Vixie, 1996.
 */
 
#ifdef __UCLIBC_HAS_IPV6__
 
static const char *
inet_ntop6(const u_char *src, char *dst, size_t size)
{
        /*
         * Note that int32_t and int16_t need only be "at least" large enough
         * to contain a value of the specified size.  On some systems, like
         * Crays, there is no such thing as an integer variable with 16 bits.
         * Keep this in mind if you think this function should have been coded
         * to use pointer overlays.  All the world's not a VAX.
         */
        char tmp[sizeof ("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")], *tp;
        struct { int base, len; } best, cur;
        u_int words[8];
        int i;
 
        /*
         * Preprocess:
         *      Copy the input (bytewise) array into a wordwise array.
         *      Find the longest run of 0x00's in src[] for :: shorthanding.
         */
        memset(words, '\0', sizeof words);
        for (i = 0; i < 16; i += 2)
                words[i / 2] = (src[i] << 8) | src[i + 1];
        best.base = -1;
        cur.base = -1;
        for (i = 0; i < 8; i++) {
                if (words[i] == 0) {
                        if (cur.base == -1)
                                cur.base = i, cur.len = 1;
                        else
                                cur.len++;
                } else {
                        if (cur.base != -1) {
                                if (best.base == -1 || cur.len > best.len)
                                        best = cur;
                                cur.base = -1;
                        }
                }
        }
        if (cur.base != -1) {
                if (best.base == -1 || cur.len > best.len)
                        best = cur;
        }
        if (best.base != -1 && best.len < 2)
                best.base = -1;
 
        /*
         * Format the result.
         */
        tp = tmp;
        for (i = 0; i < 8; i++) {
                /* Are we inside the best run of 0x00's? */
                if (best.base != -1 && i >= best.base &&
                    i < (best.base + best.len)) {
                        if (i == best.base)
                                *tp++ = ':';
                        continue;
                }
                /* Are we following an initial run of 0x00s or any real hex? */
                if (i != 0)
                        *tp++ = ':';
                /* Is this address an encapsulated IPv4? */
                if (i == 6 && best.base == 0 &&
                    (best.len == 6 || (best.len == 5 && words[5] == 0xffff))) {
                        if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp)))
                                return (NULL);
                        tp += strlen(tp);
                        break;
                }
                tp += sprintf(tp, "%x", words[i]);
        }
        /* Was it a trailing run of 0x00's? */
        if (best.base != -1 && (best.base + best.len) == 8)
                *tp++ = ':';
        *tp++ = '\0';
 
        /*
         * Check for overflow, copy, and we're done.
         */
        if ((size_t)(tp - tmp) > size) {
                __set_errno (ENOSPC);
                return (NULL);
        }
        return strcpy(dst, tmp);
}
#endif /* __UCLIBC_HAS_IPV6__ */
 
 
/* int
 * inet_pton4(src, dst)
 *      like inet_aton() but without all the hexadecimal and shorthand.
 * return:
 *      1 if `src' is a valid dotted quad, else 0.
 * notice:
 *      does not touch `dst' unless it's returning 1.
 * author:
 *      Paul Vixie, 1996.
 */
static int
inet_pton4(const char *src, u_char *dst)
{
        int saw_digit, octets, ch;
        u_char tmp[4], *tp;
 
        saw_digit = 0;
        octets = 0;
        *(tp = tmp) = 0;
        while ((ch = *src++) != '\0') {
 
                if (ch >= '0' && ch <= '9') {
                        u_int new = *tp * 10 + (ch - '0');
 
                        if (new > 255)
                                return (0);
                        *tp = new;
                        if (! saw_digit) {
                                if (++octets > 4)
                                        return (0);
                                saw_digit = 1;
                        }
                } else if (ch == '.' && saw_digit) {
                        if (octets == 4)
                                return (0);
                        *++tp = 0;
                        saw_digit = 0;
                } else
                        return (0);
        }
        if (octets < 4)
                return (0);
        memcpy(dst, tmp, 4);
        return (1);
}
 
/* int
 * inet_pton6(src, dst)
 *      convert presentation level address to network order binary form.
 * return:
 *      1 if `src' is a valid [RFC1884 2.2] address, else 0.
 * notice:
 *      (1) does not touch `dst' unless it's returning 1.
 *      (2) :: in a full address is silently ignored.
 * credit:
 *      inspired by Mark Andrews.
 * author:
 *      Paul Vixie, 1996.
 */
 
#ifdef __UCLIBC_HAS_IPV6__
 
/* We cannot use the macro version of tolower() or very bad
 * things happen when '*src++' gets evaluated multiple times.
 * So * undef it here so we get the function version of tolower
 * instead.
 */
#undef tolower
 
static int
inet_pton6(const char *src, u_char *dst)
{
        static const char xdigits[] = "0123456789abcdef";
        u_char tmp[16], *tp, *endp, *colonp;
        const char *curtok;
        int ch, saw_xdigit;
        u_int val;
 
 
        tp = memset(tmp, '\0', 16);
        endp = tp + 16;
        colonp = NULL;
        /* Leading :: requires some special handling. */
        if (*src == ':')
                if (*++src != ':')
                        return (0);
        curtok = src;
        saw_xdigit = 0;
        val = 0;
        while ((ch = tolower (*src++)) != '\0') {
                const char *pch;
 
                pch = strchr(xdigits, ch);
                if (pch != NULL) {
                        val <<= 4;
                        val |= (pch - xdigits);
                        if (val > 0xffff)
                                return (0);
                        saw_xdigit = 1;
                        continue;
                }
                if (ch == ':') {
                        curtok = src;
                        if (!saw_xdigit) {
                                if (colonp)
                                        return (0);
                                colonp = tp;
                                continue;
                        } else if (*src == '\0') {
                                return (0);
                        }
                        if (tp + 2 > endp)
                                return (0);
                        *tp++ = (u_char) (val >> 8) & 0xff;
                        *tp++ = (u_char) val & 0xff;
                        saw_xdigit = 0;
                        val = 0;
                        continue;
                }
                if (ch == '.' && ((tp + 4) <= endp) &&
                    inet_pton4(curtok, tp) > 0) {
                        tp += 4;
                        saw_xdigit = 0;
                        break;  /* '\0' was seen by inet_pton4(). */
                }
                return (0);
        }
        if (saw_xdigit) {
                if (tp + 2 > endp)
                        return (0);
                *tp++ = (u_char) (val >> 8) & 0xff;
                *tp++ = (u_char) val & 0xff;
        }
        if (colonp != NULL) {
                /*
                 * Since some memmove()'s erroneously fail to handle
                 * overlapping regions, we'll do the shift by hand.
                 */
                const int n = tp - colonp;
                int i;
 
                if (tp == endp)
                        return (0);
                for (i = 1; i <= n; i++) {
                        endp[- i] = colonp[n - i];
                        colonp[n - i] = 0;
                }
                tp = endp;
        }
        if (tp != endp)
                return (0);
        memcpy(dst, tmp, 16);
        return (1);
}
 
#endif /* __UCLIBC_HAS_IPV6__ */
 
 
 
/* char *
 * inet_ntop(af, src, dst, size)
 *      convert a network format address to presentation format.
 * return:
 *      pointer to presentation format address (`dst'), or NULL (see errno).
 * author:
 *      Paul Vixie, 1996.
 */
extern const char *
inet_ntop(af, src, dst, size)
        int af;
        const void *src;
        char *dst;
        socklen_t size;
{
        switch (af) {
        case AF_INET:
                return (inet_ntop4(src, dst, size));
#ifdef __UCLIBC_HAS_IPV6__
        case AF_INET6:
                return (inet_ntop6(src, dst, size));
#endif
        default:
                __set_errno (EAFNOSUPPORT);
                return (NULL);
        }
        /* NOTREACHED */
}
 
 
/* int
 * inet_pton(af, src, dst)
 *      convert from presentation format (which usually means ASCII printable)
 *      to network format (which is usually some kind of binary format).
 * return:
 *      1 if the address was valid for the specified address family
 *      0 if the address wasn't valid (`dst' is untouched in this case)
 *      -1 if some other error occurred (`dst' is untouched in this case, too)
 * author:
 *      Paul Vixie, 1996.
 */
extern int
inet_pton(af, src, dst)
        int af;
        const char *src;
        void *dst;
{
        switch (af) {
        case AF_INET:
                return (inet_pton4(src, dst));
#ifdef __UCLIBC_HAS_IPV6__
        case AF_INET6:
                return (inet_pton6(src, dst));
#endif
        default:
                __set_errno (EAFNOSUPPORT);
                return (-1);
        }
        /* NOTREACHED */
}
 

Browse

Tools

Subversion Repositories or1k

[/] [or1k/] [trunk/] [linux/] [uClibc/] [libc/] [inet/] [ntop.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1325	phoenix	`/*`
2			`* Copyright (c) 1996-1999 by Internet Software Consortium.`
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
18			`#define __FORCE_GLIBC`
19			`#include <features.h>`
20			`#include <sys/param.h>`
21			`#include <sys/types.h>`
22			`#include <sys/socket.h>`
23
24			`#include <netinet/in.h>`
25			`#include <arpa/inet.h>`
26			`#include <arpa/nameser.h>`
27
28			`#include <errno.h>`
29			`#include <stdio.h>`
30			`#include <string.h>`
31			`#include <ctype.h>`
32
33
34			`/*`
35			`* WARNING: Don't even consider trying to compile this on a system where`
36			`* sizeof(int) < 4. sizeof(int) > 4 is fine; all the world's not a VAX.`
37			`*/`
38
39
40			`/* const char *`
41			`* inet_ntop4(src, dst, size)`
42			`* format an IPv4 address`
43			`* return:`
44			* `dst' (as a const)
45			`* notes:`
46			`* (1) uses no statics`
47			`* (2) takes a u_char* not an in_addr as input`
48			`* author:`
49			`* Paul Vixie, 1996.`
50			`*/`
51			`static const char *`
52			`inet_ntop4(const u_char src, char dst, size_t size)`
53			`{`
54			`char tmp[sizeof ("255.255.255.255") + 1] = "\0";`
55			`int octet;`
56			`int i;`
57
58			`i = 0;`
59			`for (octet = 0; octet <= 3; octet++) {`
60
61			`if (src[octet] > 255) {`
62			`__set_errno (ENOSPC);`
63			`return (NULL);`
64			`}`
65			`tmp[i++] = '0' + src[octet] / 100;`
66			`if (tmp[i - 1] == '0') {`
67			`tmp[i - 1] = '0' + (src[octet] / 10 % 10);`
68			`if (tmp[i - 1] == '0') i--;`
69			`} else {`
70			`tmp[i++] = '0' + (src[octet] / 10 % 10);`
71			`}`
72			`tmp[i++] = '0' + src[octet] % 10;`
73			`tmp[i++] = '.';`
74			`}`
75			`tmp[i - 1] = '\0';`
76
77			`if (strlen (tmp) > size) {`
78			`__set_errno (ENOSPC);`
79			`return (NULL);`
80			`}`
81
82			`return strcpy(dst, tmp);`
83			`}`
84
85
86			`/* const char *`
87			`* inet_ntop6(src, dst, size)`
88			`* convert IPv6 binary address into presentation (printable) format`
89			`* author:`
90			`* Paul Vixie, 1996.`
91			`*/`
92
93			`#ifdef __UCLIBC_HAS_IPV6__`
94
95			`static const char *`
96			`inet_ntop6(const u_char src, char dst, size_t size)`
97			`{`
98			`/*`
99			`* Note that int32_t and int16_t need only be "at least" large enough`
100			`* to contain a value of the specified size. On some systems, like`
101			`* Crays, there is no such thing as an integer variable with 16 bits.`
102			`* Keep this in mind if you think this function should have been coded`
103			`* to use pointer overlays. All the world's not a VAX.`
104			`*/`
105			`char tmp[sizeof ("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")], *tp;`
106			`struct { int base, len; } best, cur;`
107			`u_int words[8];`
108			`int i;`
109
110			`/*`
111			`* Preprocess:`
112			`* Copy the input (bytewise) array into a wordwise array.`
113			`* Find the longest run of 0x00's in src[] for :: shorthanding.`
114			`*/`
115			`memset(words, '\0', sizeof words);`
116			`for (i = 0; i < 16; i += 2)`
117			`words[i / 2] = (src[i] << 8) \| src[i + 1];`
118			`best.base = -1;`
119			`cur.base = -1;`
120			`for (i = 0; i < 8; i++) {`
121			`if (words[i] == 0) {`
122			`if (cur.base == -1)`
123			`cur.base = i, cur.len = 1;`
124			`else`
125			`cur.len++;`
126			`} else {`
127			`if (cur.base != -1) {`
128			`if (best.base == -1 \|\| cur.len > best.len)`
129			`best = cur;`
130			`cur.base = -1;`
131			`}`
132			`}`
133			`}`
134			`if (cur.base != -1) {`
135			`if (best.base == -1 \|\| cur.len > best.len)`
136			`best = cur;`
137			`}`
138			`if (best.base != -1 && best.len < 2)`
139			`best.base = -1;`
140
141			`/*`
142			`* Format the result.`
143			`*/`
144			`tp = tmp;`
145			`for (i = 0; i < 8; i++) {`
146			`/* Are we inside the best run of 0x00's? */`
147			`if (best.base != -1 && i >= best.base &&`
148			`i < (best.base + best.len)) {`
149			`if (i == best.base)`
150			`*tp++ = ':';`
151			`continue;`
152			`}`
153			`/* Are we following an initial run of 0x00s or any real hex? */`
154			`if (i != 0)`
155			`*tp++ = ':';`
156			`/* Is this address an encapsulated IPv4? */`
157			`if (i == 6 && best.base == 0 &&`
158			`(best.len == 6 \|\| (best.len == 5 && words[5] == 0xffff))) {`
159			`if (!inet_ntop4(src+12, tp, sizeof tmp - (tp - tmp)))`
160			`return (NULL);`
161			`tp += strlen(tp);`
162			`break;`
163			`}`
164			`tp += sprintf(tp, "%x", words[i]);`
165			`}`
166			`/* Was it a trailing run of 0x00's? */`
167			`if (best.base != -1 && (best.base + best.len) == 8)`
168			`*tp++ = ':';`
169			`*tp++ = '\0';`
170
171			`/*`
172			`* Check for overflow, copy, and we're done.`
173			`*/`
174			`if ((size_t)(tp - tmp) > size) {`
175			`__set_errno (ENOSPC);`
176			`return (NULL);`
177			`}`
178			`return strcpy(dst, tmp);`
179			`}`
180			`#endif /* __UCLIBC_HAS_IPV6__ */`
181
182
183			`/* int`
184			`* inet_pton4(src, dst)`
185			`* like inet_aton() but without all the hexadecimal and shorthand.`
186			`* return:`
187			* 1 if `src' is a valid dotted quad, else 0.
188			`* notice:`
189			* does not touch `dst' unless it's returning 1.
190			`* author:`
191			`* Paul Vixie, 1996.`
192			`*/`
193			`static int`
194			`inet_pton4(const char src, u_char dst)`
195			`{`
196			`int saw_digit, octets, ch;`
197			`u_char tmp[4], *tp;`
198
199			`saw_digit = 0;`
200			`octets = 0;`
201			`*(tp = tmp) = 0;`
202			`while ((ch = *src++) != '\0') {`
203
204			`if (ch >= '0' && ch <= '9') {`
205			`u_int new = tp 10 + (ch - '0');`
206
207			`if (new > 255)`
208			`return (0);`
209			`*tp = new;`
210			`if (! saw_digit) {`
211			`if (++octets > 4)`
212			`return (0);`
213			`saw_digit = 1;`
214			`}`
215			`} else if (ch == '.' && saw_digit) {`
216			`if (octets == 4)`
217			`return (0);`
218			`*++tp = 0;`
219			`saw_digit = 0;`
220			`} else`
221			`return (0);`
222			`}`
223			`if (octets < 4)`
224			`return (0);`
225			`memcpy(dst, tmp, 4);`
226			`return (1);`
227			`}`
228
229			`/* int`
230			`* inet_pton6(src, dst)`
231			`* convert presentation level address to network order binary form.`
232			`* return:`
233			* 1 if `src' is a valid [RFC1884 2.2] address, else 0.
234			`* notice:`
235			* (1) does not touch `dst' unless it's returning 1.
236			`* (2) :: in a full address is silently ignored.`
237			`* credit:`
238			`* inspired by Mark Andrews.`
239			`* author:`
240			`* Paul Vixie, 1996.`
241			`*/`
242
243			`#ifdef __UCLIBC_HAS_IPV6__`
244
245			`/* We cannot use the macro version of tolower() or very bad`
246			`* things happen when '*src++' gets evaluated multiple times.`
247			`* So * undef it here so we get the function version of tolower`
248			`* instead.`
249			`*/`
250			`#undef tolower`
251
252			`static int`
253			`inet_pton6(const char src, u_char dst)`
254			`{`
255			`static const char xdigits[] = "0123456789abcdef";`
256			`u_char tmp[16], tp, endp, *colonp;`
257			`const char *curtok;`
258			`int ch, saw_xdigit;`
259			`u_int val;`
260
261
262			`tp = memset(tmp, '\0', 16);`
263			`endp = tp + 16;`
264			`colonp = NULL;`
265			`/* Leading :: requires some special handling. */`
266			`if (*src == ':')`
267			`if (*++src != ':')`
268			`return (0);`
269			`curtok = src;`
270			`saw_xdigit = 0;`
271			`val = 0;`
272			`while ((ch = tolower (*src++)) != '\0') {`
273			`const char *pch;`
274
275			`pch = strchr(xdigits, ch);`
276			`if (pch != NULL) {`
277			`val <<= 4;`
278			`val \|= (pch - xdigits);`
279			`if (val > 0xffff)`
280			`return (0);`
281			`saw_xdigit = 1;`
282			`continue;`
283			`}`
284			`if (ch == ':') {`
285			`curtok = src;`
286			`if (!saw_xdigit) {`
287			`if (colonp)`
288			`return (0);`
289			`colonp = tp;`
290			`continue;`
291			`} else if (*src == '\0') {`
292			`return (0);`
293			`}`
294			`if (tp + 2 > endp)`
295			`return (0);`
296			`*tp++ = (u_char) (val >> 8) & 0xff;`
297			`*tp++ = (u_char) val & 0xff;`
298			`saw_xdigit = 0;`
299			`val = 0;`
300			`continue;`
301			`}`
302			`if (ch == '.' && ((tp + 4) <= endp) &&`
303			`inet_pton4(curtok, tp) > 0) {`
304			`tp += 4;`
305			`saw_xdigit = 0;`
306			`break; /* '\0' was seen by inet_pton4(). */`
307			`}`
308			`return (0);`
309			`}`
310			`if (saw_xdigit) {`
311			`if (tp + 2 > endp)`
312			`return (0);`
313			`*tp++ = (u_char) (val >> 8) & 0xff;`
314			`*tp++ = (u_char) val & 0xff;`
315			`}`
316			`if (colonp != NULL) {`
317			`/*`
318			`* Since some memmove()'s erroneously fail to handle`
319			`* overlapping regions, we'll do the shift by hand.`
320			`*/`
321			`const int n = tp - colonp;`
322			`int i;`
323
324			`if (tp == endp)`
325			`return (0);`
326			`for (i = 1; i <= n; i++) {`
327			`endp[- i] = colonp[n - i];`
328			`colonp[n - i] = 0;`
329			`}`
330			`tp = endp;`
331			`}`
332			`if (tp != endp)`
333			`return (0);`
334			`memcpy(dst, tmp, 16);`
335			`return (1);`
336			`}`
337
338			`#endif /* __UCLIBC_HAS_IPV6__ */`
339
340
341
342			`/* char *`
343			`* inet_ntop(af, src, dst, size)`
344			`* convert a network format address to presentation format.`
345			`* return:`
346			* pointer to presentation format address (`dst'), or NULL (see errno).
347			`* author:`
348			`* Paul Vixie, 1996.`
349			`*/`
350			`extern const char *`
351			`inet_ntop(af, src, dst, size)`
352			`int af;`
353			`const void *src;`
354			`char *dst;`
355			`socklen_t size;`
356			`{`
357			`switch (af) {`
358			`case AF_INET:`
359			`return (inet_ntop4(src, dst, size));`
360			`#ifdef __UCLIBC_HAS_IPV6__`
361			`case AF_INET6:`
362			`return (inet_ntop6(src, dst, size));`
363			`#endif`
364			`default:`
365			`__set_errno (EAFNOSUPPORT);`
366			`return (NULL);`
367			`}`
368			`/* NOTREACHED */`
369			`}`
370
371
372			`/* int`
373			`* inet_pton(af, src, dst)`
374			`* convert from presentation format (which usually means ASCII printable)`
375			`* to network format (which is usually some kind of binary format).`
376			`* return:`
377			`* 1 if the address was valid for the specified address family`
378			* 0 if the address wasn't valid (`dst' is untouched in this case)
379			* -1 if some other error occurred (`dst' is untouched in this case, too)
380			`* author:`
381			`* Paul Vixie, 1996.`
382			`*/`
383			`extern int`
384			`inet_pton(af, src, dst)`
385			`int af;`
386			`const char *src;`
387			`void *dst;`
388			`{`
389			`switch (af) {`
390			`case AF_INET:`
391			`return (inet_pton4(src, dst));`
392			`#ifdef __UCLIBC_HAS_IPV6__`
393			`case AF_INET6:`
394			`return (inet_pton6(src, dst));`
395			`#endif`
396			`default:`
397			`__set_errno (EAFNOSUPPORT);`
398			`return (-1);`
399			`}`
400			`/* NOTREACHED */`
401			`}`
402