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glibc/resolv/nsap_addr.c
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/* | |
* 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. | |
*/ | |
#if defined(LIBC_SCCS) && !defined(lint) | |
static const char rcsid[] = "$BINDId: nsap_addr.c,v 8.10 1999/10/13 16:39:28 vixie Exp $"; | |
#endif /* LIBC_SCCS and not lint */ | |
#include <sys/types.h> | |
#include <sys/param.h> | |
#include <sys/socket.h> | |
#include <netinet/in.h> | |
#include <arpa/inet.h> | |
#include <arpa/nameser.h> | |
#include <ctype.h> | |
#include <resolv.h> | |
static char | |
xtob(int c) { | |
return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); | |
} | |
u_int | |
inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { | |
u_char c, nib; | |
u_int len = 0; | |
while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { | |
if (c == '.' || c == '+' || c == '/') | |
continue; | |
if (!isascii(c)) | |
return (0); | |
c = toupper(c); | |
if (isxdigit(c)) { | |
nib = xtob(c); | |
c = *ascii++; | |
if (c != '\0') { | |
c = toupper(c); | |
if (isxdigit(c)) { | |
*binary++ = (nib << 4) | xtob(c); | |
len++; | |
} else | |
return (0); | |
} | |
else | |
return (0); | |
} | |
else | |
return (0); | |
} | |
return (len); | |
} | |
char * | |
inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { | |
int nib; | |
int i; | |
static char tmpbuf[255*2 + 128]; | |
char *start; | |
if (ascii) | |
start = ascii; | |
else { | |
ascii = tmpbuf; | |
start = tmpbuf; | |
} | |
if (binlen > 255) | |
binlen = 255; | |
for (i = 0; i < binlen; i++) { | |
nib = *binary >> 4; | |
*ascii++ = nib + (nib < 10 ? '0' : '7'); | |
nib = *binary++ & 0x0f; | |
*ascii++ = nib + (nib < 10 ? '0' : '7'); | |
if (((i % 2) == 0 && (i + 1) < binlen)) | |
*ascii++ = '.'; | |
} | |
*ascii = '\0'; | |
return (start); | |
} |