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 1.3.18.2 2005/07/28 07:38:08 marka Exp $"; 20 #endif /* LIBC_SCCS and not lint */ 21 #include <sys/cdefs.h> 22 __FBSDID("$FreeBSD$"); 23 24 #include "port_before.h" 25 26 #include <sys/types.h> 27 #include <sys/param.h> 28 #include <sys/socket.h> 29 30 #include <netinet/in.h> 31 #include <arpa/inet.h> 32 #include <arpa/nameser.h> 33 34 #include <ctype.h> 35 #include <resolv.h> 36 #include <resolv_mt.h> 37 38 #include "port_after.h" 39 40 static char 41 xtob(int c) { 42 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 43 } 44 45 u_int 46 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 47 u_char c, nib; 48 u_int len = 0; 49 50 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 51 return (0); 52 ascii += 2; 53 54 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 55 if (c == '.' || c == '+' || c == '/') 56 continue; 57 if (!isascii(c)) 58 return (0); 59 if (islower(c)) 60 c = toupper(c); 61 if (isxdigit(c)) { 62 nib = xtob(c); 63 c = *ascii++; 64 if (c != '\0') { 65 c = toupper(c); 66 if (isxdigit(c)) { 67 *binary++ = (nib << 4) | xtob(c); 68 len++; 69 } else 70 return (0); 71 } 72 else 73 return (0); 74 } 75 else 76 return (0); 77 } 78 return (len); 79 } 80 81 char * 82 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 83 int nib; 84 int i; 85 char *tmpbuf = inet_nsap_ntoa_tmpbuf; 86 char *start; 87 88 if (ascii) 89 start = ascii; 90 else { 91 ascii = tmpbuf; 92 start = tmpbuf; 93 } 94 95 *ascii++ = '0'; 96 *ascii++ = 'x'; 97 98 if (binlen > 255) 99 binlen = 255; 100 101 for (i = 0; i < binlen; i++) { 102 nib = *binary >> 4; 103 *ascii++ = nib + (nib < 10 ? '0' : '7'); 104 nib = *binary++ & 0x0f; 105 *ascii++ = nib + (nib < 10 ? '0' : '7'); 106 if (((i % 2) == 0 && (i + 1) < binlen)) 107 *ascii++ = '.'; 108 } 109 *ascii = '\0'; 110 return (start); 111 } 112 113 /* 114 * Weak aliases for applications that use certain private entry points, 115 * and fail to include <arpa/inet.h>. 116 */ 117 #undef inet_nsap_addr 118 __weak_reference(__inet_nsap_addr, inet_nsap_addr); 119 #undef inet_nsap_ntoa 120 __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa); 121 122 /*! \file */ 123