1 /* 2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 3 * Copyright (c) 1996-1999 by Internet Software Consortium. 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #if defined(LIBC_SCCS) && !defined(lint) 19 static const char rcsid[] = "$Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp $"; 20 #endif /* LIBC_SCCS and not lint */ 21 22 #include "port_before.h" 23 24 #include <sys/types.h> 25 #include <sys/param.h> 26 #include <sys/socket.h> 27 28 #include <netinet/in.h> 29 #include <arpa/inet.h> 30 #include <arpa/nameser.h> 31 32 #include <ctype.h> 33 #include <resolv.h> 34 #include <resolv_mt.h> 35 36 #include "port_after.h" 37 38 static char 39 xtob(int c) { 40 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 41 } 42 43 u_int 44 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 45 u_char c, nib; 46 u_int len = 0; 47 48 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 49 return (0); 50 ascii += 2; 51 52 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 53 if (c == '.' || c == '+' || c == '/') 54 continue; 55 if (!isascii(c)) 56 return (0); 57 if (islower(c)) 58 c = toupper(c); 59 if (isxdigit(c)) { 60 nib = xtob(c); 61 c = *ascii++; 62 if (c != '\0') { 63 c = toupper(c); 64 if (isxdigit(c)) { 65 *binary++ = (nib << 4) | xtob(c); 66 len++; 67 } else 68 return (0); 69 } 70 else 71 return (0); 72 } 73 else 74 return (0); 75 } 76 return (len); 77 } 78 79 char * 80 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 81 int nib; 82 int i; 83 char *tmpbuf = inet_nsap_ntoa_tmpbuf; 84 char *start; 85 86 if (ascii) 87 start = ascii; 88 else { 89 ascii = tmpbuf; 90 start = tmpbuf; 91 } 92 93 *ascii++ = '0'; 94 *ascii++ = 'x'; 95 96 if (binlen > 255) 97 binlen = 255; 98 99 for (i = 0; i < binlen; i++) { 100 nib = *binary >> 4; 101 *ascii++ = nib + (nib < 10 ? '0' : '7'); 102 nib = *binary++ & 0x0f; 103 *ascii++ = nib + (nib < 10 ? '0' : '7'); 104 if (((i % 2) == 0 && (i + 1) < binlen)) 105 *ascii++ = '.'; 106 } 107 *ascii = '\0'; 108 return (start); 109 } 110 111 /*! \file */ 112