1 /* $NetBSD: nsap_addr.c,v 1.2 2004/05/20 23:12:33 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 1.2.206.1 2004/03/09 08:33:33 marka Exp"; 24 #else 25 __RCSID("$NetBSD: nsap_addr.c,v 1.2 2004/05/20 23:12:33 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 44 #include "port_after.h" 45 46 #ifdef __weak_alias 47 __weak_alias(inet_nsap_addr,_inet_nsap_addr) 48 __weak_alias(inet_nsap_ntoa,_inet_nsap_ntoa) 49 #endif 50 51 static char 52 xtob(int c) { 53 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 54 } 55 56 u_int 57 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 58 u_char c, nib; 59 u_int len = 0; 60 61 _DIAGASSERT(ascii != NULL); 62 _DIAGASSERT(binary != NULL); 63 64 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 65 return (0); 66 ascii += 2; 67 68 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 69 if (c == '.' || c == '+' || c == '/') 70 continue; 71 if (!isascii(c)) 72 return (0); 73 if (islower(c)) 74 c = toupper(c); 75 if (isxdigit(c)) { 76 nib = xtob(c); 77 c = *ascii++; 78 if (c != '\0') { 79 c = toupper(c); 80 if (isxdigit(c)) { 81 *binary++ = (nib << 4) | xtob(c); 82 len++; 83 } else 84 return (0); 85 } 86 else 87 return (0); 88 } 89 else 90 return (0); 91 } 92 return (len); 93 } 94 95 char * 96 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 97 int nib; 98 int i; 99 static char tmpbuf[2+255*3]; 100 char *start; 101 102 _DIAGASSERT(binary != NULL); 103 104 if (ascii) 105 start = ascii; 106 else { 107 ascii = tmpbuf; 108 start = tmpbuf; 109 } 110 111 *ascii++ = '0'; 112 *ascii++ = 'x'; 113 114 if (binlen > 255) 115 binlen = 255; 116 117 for (i = 0; i < binlen; i++) { 118 nib = (u_int32_t)*binary >> 4; 119 *ascii++ = nib + (nib < 10 ? '0' : '7'); 120 nib = *binary++ & 0x0f; 121 *ascii++ = nib + (nib < 10 ? '0' : '7'); 122 if (((i % 2) == 0 && (i + 1) < binlen)) 123 *ascii++ = '.'; 124 } 125 *ascii = '\0'; 126 return (start); 127 } 128