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 <sys/types.h> 32 #include <sys/param.h> 33 #include <sys/socket.h> 34 35 #include <netinet/in.h> 36 #include <arpa/inet.h> 37 #include <arpa/nameser.h> 38 39 #include <assert.h> 40 #include <ctype.h> 41 #include <resolv.h> 42 #include <resolv_mt.h> 43 44 #include "port_after.h" 45 46 static char 47 xtob(int c) { 48 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 49 } 50 51 u_int 52 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 53 u_char c, nib; 54 u_int len = 0; 55 56 assert(ascii != NULL); 57 assert(binary != NULL); 58 59 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 60 return (0); 61 ascii += 2; 62 63 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 64 if (c == '.' || c == '+' || c == '/') 65 continue; 66 if (!isascii(c)) 67 return (0); 68 if (islower(c)) 69 c = toupper(c); 70 if (isxdigit(c)) { 71 nib = xtob(c); 72 c = *ascii++; 73 if (c != '\0') { 74 c = toupper(c); 75 if (isxdigit(c)) { 76 *binary++ = (nib << 4) | xtob(c); 77 len++; 78 } else 79 return (0); 80 } 81 else 82 return (0); 83 } 84 else 85 return (0); 86 } 87 return (len); 88 } 89 90 char * 91 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 92 int nib; 93 int i; 94 char *tmpbuf = inet_nsap_ntoa_tmpbuf; 95 char *start; 96 97 assert(binary != NULL); 98 99 if (ascii) 100 start = ascii; 101 else { 102 ascii = tmpbuf; 103 start = tmpbuf; 104 } 105 106 *ascii++ = '0'; 107 *ascii++ = 'x'; 108 109 if (binlen > 255) 110 binlen = 255; 111 112 for (i = 0; i < binlen; i++) { 113 nib = (u_int32_t)*binary >> 4; 114 *ascii++ = nib + (nib < 10 ? '0' : '7'); 115 nib = *binary++ & 0x0f; 116 *ascii++ = nib + (nib < 10 ? '0' : '7'); 117 if (((i % 2) == 0 && (i + 1) < binlen)) 118 *ascii++ = '.'; 119 } 120 *ascii = '\0'; 121 return (start); 122 } 123 124 #undef inet_nsap_addr 125 #pragma weak inet_nsap_addr = __inet_nsap_addr 126 #undef inet_nsap_ntoa 127 #pragma weak inet_nsap_ntoa = __inet_nsap_ntoa 128