1 /* $NetBSD: nsap_addr.c,v 1.1.1.1 2004/05/20 22:29:02 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 #if defined(LIBC_SCCS) && !defined(lint) 21 static const char rcsid[] = "Id: nsap_addr.c,v 1.2.206.1 2004/03/09 08:33:33 marka Exp"; 22 #endif /* LIBC_SCCS and not lint */ 23 24 #include "port_before.h" 25 26 #include <sys/types.h> 27 #include <sys/param.h> 28 #include <sys/socket.h> 29 30 #include <netinet/in.h> 31 #include <arpa/inet.h> 32 #include <arpa/nameser.h> 33 34 #include <ctype.h> 35 #include <resolv.h> 36 37 #include "port_after.h" 38 39 static char 40 xtob(int c) { 41 return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 42 } 43 44 u_int 45 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { 46 u_char c, nib; 47 u_int len = 0; 48 49 if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) 50 return (0); 51 ascii += 2; 52 53 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 54 if (c == '.' || c == '+' || c == '/') 55 continue; 56 if (!isascii(c)) 57 return (0); 58 if (islower(c)) 59 c = toupper(c); 60 if (isxdigit(c)) { 61 nib = xtob(c); 62 c = *ascii++; 63 if (c != '\0') { 64 c = toupper(c); 65 if (isxdigit(c)) { 66 *binary++ = (nib << 4) | xtob(c); 67 len++; 68 } else 69 return (0); 70 } 71 else 72 return (0); 73 } 74 else 75 return (0); 76 } 77 return (len); 78 } 79 80 char * 81 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { 82 int nib; 83 int i; 84 static char tmpbuf[2+255*3]; 85 char *start; 86 87 if (ascii) 88 start = ascii; 89 else { 90 ascii = tmpbuf; 91 start = tmpbuf; 92 } 93 94 *ascii++ = '0'; 95 *ascii++ = 'x'; 96 97 if (binlen > 255) 98 binlen = 255; 99 100 for (i = 0; i < binlen; i++) { 101 nib = *binary >> 4; 102 *ascii++ = nib + (nib < 10 ? '0' : '7'); 103 nib = *binary++ & 0x0f; 104 *ascii++ = nib + (nib < 10 ? '0' : '7'); 105 if (((i % 2) == 0 && (i + 1) < binlen)) 106 *ascii++ = '.'; 107 } 108 *ascii = '\0'; 109 return (start); 110 } 111