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 * $Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp $ 18 */ 19 20 #include "port_before.h" 21 22 #include <sys/types.h> 23 #include <sys/param.h> 24 #include <sys/socket.h> 25 26 #include <netinet/in.h> 27 #include <arpa/inet.h> 28 #include <arpa/nameser.h> 29 30 #include <ctype.h> 31 #include <resolv.h> 32 #include "resolv_mt.h" 33 34 #include "port_after.h" 35 36 static char 37 xtob(int c) { 38 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 39 } 40 41 u_int 42 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 43 u_char c, nib; 44 u_int len = 0; 45 46 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 47 return (0); 48 ascii += 2; 49 50 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 51 if (c == '.' || c == '+' || c == '/') 52 continue; 53 if (!isascii(c)) 54 return (0); 55 if (islower(c)) 56 c = toupper(c); 57 if (isxdigit(c)) { 58 nib = xtob(c); 59 c = *ascii++; 60 if (c != '\0') { 61 c = toupper(c); 62 if (isxdigit(c)) { 63 *binary++ = (nib << 4) | xtob(c); 64 len++; 65 } else 66 return (0); 67 } 68 else 69 return (0); 70 } 71 else 72 return (0); 73 } 74 return (len); 75 } 76 77 char * 78 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 79 int nib; 80 int i; 81 char *tmpbuf = inet_nsap_ntoa_tmpbuf; 82 char *start; 83 84 if (ascii) 85 start = ascii; 86 else { 87 ascii = tmpbuf; 88 start = tmpbuf; 89 } 90 91 *ascii++ = '0'; 92 *ascii++ = 'x'; 93 94 if (binlen > 255) 95 binlen = 255; 96 97 for (i = 0; i < binlen; i++) { 98 nib = *binary >> 4; 99 *ascii++ = nib + (nib < 10 ? '0' : '7'); 100 nib = *binary++ & 0x0f; 101 *ascii++ = nib + (nib < 10 ? '0' : '7'); 102 if (((i % 2) == 0 && (i + 1) < binlen)) 103 *ascii++ = '.'; 104 } 105 *ascii = '\0'; 106 return (start); 107 } 108 109 /* 110 * Weak aliases for applications that use certain private entry points, 111 * and fail to include <arpa/inet.h>. 112 */ 113 #undef inet_nsap_addr 114 __weak_reference(__inet_nsap_addr, inet_nsap_addr); 115 #undef inet_nsap_ntoa 116 __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa); 117