1 /* $NetBSD: nsap_addr.c,v 1.6 2009/04/12 17:07:17 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (c) 1996-1999 by Internet Software Consortium. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/cdefs.h> 21 #if defined(LIBC_SCCS) && !defined(lint) 22 #if 0 23 static const char rcsid[] = "Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp"; 24 #else 25 __RCSID("$NetBSD: nsap_addr.c,v 1.6 2009/04/12 17:07:17 christos Exp $"); 26 #endif 27 #endif /* LIBC_SCCS and not lint */ 28 29 #include "port_before.h" 30 31 #include "namespace.h" 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/socket.h> 35 36 #include <netinet/in.h> 37 #include <arpa/inet.h> 38 #include <arpa/nameser.h> 39 40 #include <assert.h> 41 #include <ctype.h> 42 #include <resolv.h> 43 #include <resolv_mt.h> 44 45 #include "port_after.h" 46 47 #ifdef __weak_alias 48 __weak_alias(inet_nsap_addr,_inet_nsap_addr) 49 __weak_alias(inet_nsap_ntoa,_inet_nsap_ntoa) 50 #endif 51 52 static char 53 xtob(int c) { 54 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 55 } 56 57 u_int 58 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 59 u_char c, nib; 60 u_int len = 0; 61 62 _DIAGASSERT(ascii != NULL); 63 _DIAGASSERT(binary != NULL); 64 65 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 66 return (0); 67 ascii += 2; 68 69 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 70 if (c == '.' || c == '+' || c == '/') 71 continue; 72 if (!isascii(c)) 73 return (0); 74 if (islower(c)) 75 c = toupper(c); 76 if (isxdigit(c)) { 77 nib = xtob(c); 78 c = *ascii++; 79 if (c != '\0') { 80 c = toupper(c); 81 if (isxdigit(c)) { 82 *binary++ = (nib << 4) | xtob(c); 83 len++; 84 } else 85 return (0); 86 } 87 else 88 return (0); 89 } 90 else 91 return (0); 92 } 93 return (len); 94 } 95 96 char * 97 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 98 int nib; 99 int i; 100 char *tmpbuf = inet_nsap_ntoa_tmpbuf; 101 char *start; 102 103 _DIAGASSERT(binary != NULL); 104 105 if (ascii) 106 start = ascii; 107 else { 108 ascii = tmpbuf; 109 start = tmpbuf; 110 } 111 112 *ascii++ = '0'; 113 *ascii++ = 'x'; 114 115 if (binlen > 255) 116 binlen = 255; 117 118 for (i = 0; i < binlen; i++) { 119 nib = (u_int32_t)*binary >> 4; 120 *ascii++ = nib + (nib < 10 ? '0' : '7'); 121 nib = *binary++ & 0x0f; 122 *ascii++ = nib + (nib < 10 ? '0' : '7'); 123 if (((i % 2) == 0 && (i + 1) < binlen)) 124 *ascii++ = '.'; 125 } 126 *ascii = '\0'; 127 return (start); 128 } 129 130 /*! \file */ 131