1 /*- 2 * SPDX-License-Identifier: ISC 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 #if defined(LIBC_SCCS) && !defined(lint) 21 static const char rcsid[] = "$Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp $"; 22 #endif /* LIBC_SCCS and not lint */ 23 #include <sys/cdefs.h> 24 __FBSDID("$FreeBSD$"); 25 26 #include "port_before.h" 27 28 #include <sys/param.h> 29 #include <sys/socket.h> 30 31 #include <netinet/in.h> 32 #include <arpa/inet.h> 33 #include <arpa/nameser.h> 34 35 #include <ctype.h> 36 #include <resolv.h> 37 #include <resolv_mt.h> 38 39 #include "port_after.h" 40 41 static char 42 xtob(int c) { 43 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 44 } 45 46 u_int 47 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 48 u_char c, nib; 49 u_int len = 0; 50 51 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 52 return (0); 53 ascii += 2; 54 55 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 56 if (c == '.' || c == '+' || c == '/') 57 continue; 58 if (!isascii(c)) 59 return (0); 60 if (islower(c)) 61 c = toupper(c); 62 if (isxdigit(c)) { 63 nib = xtob(c); 64 c = *ascii++; 65 if (c != '\0') { 66 c = toupper(c); 67 if (isxdigit(c)) { 68 *binary++ = (nib << 4) | xtob(c); 69 len++; 70 } else 71 return (0); 72 } 73 else 74 return (0); 75 } 76 else 77 return (0); 78 } 79 return (len); 80 } 81 82 char * 83 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 84 int nib; 85 int i; 86 char *tmpbuf = inet_nsap_ntoa_tmpbuf; 87 char *start; 88 89 if (ascii) 90 start = ascii; 91 else { 92 ascii = tmpbuf; 93 start = tmpbuf; 94 } 95 96 *ascii++ = '0'; 97 *ascii++ = 'x'; 98 99 if (binlen > 255) 100 binlen = 255; 101 102 for (i = 0; i < binlen; i++) { 103 nib = *binary >> 4; 104 *ascii++ = nib + (nib < 10 ? '0' : '7'); 105 nib = *binary++ & 0x0f; 106 *ascii++ = nib + (nib < 10 ? '0' : '7'); 107 if (((i % 2) == 0 && (i + 1) < binlen)) 108 *ascii++ = '.'; 109 } 110 *ascii = '\0'; 111 return (start); 112 } 113 114 /* 115 * Weak aliases for applications that use certain private entry points, 116 * and fail to include <arpa/inet.h>. 117 */ 118 #undef inet_nsap_addr 119 __weak_reference(__inet_nsap_addr, inet_nsap_addr); 120 #undef inet_nsap_ntoa 121 __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa); 122 123 /*! \file */ 124