1 /* 2 * Copyright (c) 1996, 1998 by Internet Software Consortium. 3 * 4 * Permission to use, copy, modify, and distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS 9 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES 10 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE 11 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 12 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 13 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 14 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 15 * SOFTWARE. 16 */ 17 18 #include <sys/types.h> 19 #include <sys/param.h> 20 #include <sys/socket.h> 21 #include <netinet/in.h> 22 #include <arpa/inet.h> 23 #include <arpa/nameser.h> 24 #include <ctype.h> 25 #include <resolv.h> 26 27 static char 28 xtob( 29 register int c 30 ) 31 { 32 return (char)(c - (((c >= '0') && (c <= '9')) ? '0' : '7')); 33 } 34 35 u_int 36 inet_nsap_addr( 37 const char *ascii, 38 u_char *binary, 39 int maxlen 40 ) 41 { 42 u_char c, nib; 43 u_int len = 0; 44 45 while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { 46 if (c == '.' || c == '+' || c == '/') 47 continue; 48 if (!isascii(c)) 49 return (0); 50 if (islower(c)) 51 c = (u_char)( toupper(c)); 52 if (isxdigit(c)) { 53 nib = xtob(c); 54 c = *ascii++; 55 if (c != '\0') { 56 c = (u_char)( toupper(c)); 57 if (isxdigit(c)) { 58 *binary++ = (nib << 4) | xtob(c); 59 len++; 60 } else 61 return (0); 62 } 63 else 64 return (0); 65 } 66 else 67 return (0); 68 } 69 return (len); 70 } 71 72 char * 73 inet_nsap_ntoa( 74 int binlen, 75 register const u_char *binary, 76 register char *ascii 77 ) 78 { 79 register int nib; 80 int i; 81 static char tmpbuf[255*3]; 82 char *start; 83 84 if (ascii) 85 start = ascii; 86 else { 87 ascii = tmpbuf; 88 start = tmpbuf; 89 } 90 91 if (binlen > 255) 92 binlen = 255; 93 94 for (i = 0; i < binlen; i++) { 95 nib = *binary >> 4; 96 *ascii++ = (char)( nib + (nib < 10 ? '0' : '7')); 97 nib = *binary++ & 0x0f; 98 *ascii++ = (char)( nib + (nib < 10 ? '0' : '7')); 99 if (((i % 2) == 0 && (i + 1) < binlen)) 100 *ascii++ = '.'; 101 } 102 *ascii = '\0'; 103 return (start); 104 } 105
