| The Android Open Source Project | a27d2ba | 2008-10-21 07:00:00 -0700 | [diff] [blame^] | 1 | /* $NetBSD: nsap_addr.c,v 1.2 2004/05/20 23:12:33 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 1.2.206.1 2004/03/09 08:33:33 marka Exp"; |
| 24 | #else |
| 25 | __RCSID("$NetBSD: nsap_addr.c,v 1.2 2004/05/20 23:12:33 christos Exp $"); |
| 26 | #endif |
| 27 | #endif /* LIBC_SCCS and not lint */ |
| 28 | |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/param.h> |
| 31 | #include <sys/socket.h> |
| 32 | |
| 33 | #include <netinet/in.h> |
| 34 | #include <arpa/inet.h> |
| 35 | #include "arpa_nameser.h" |
| 36 | |
| 37 | #include <assert.h> |
| 38 | #include <ctype.h> |
| 39 | #ifdef ANDROID_CHANGES |
| 40 | #include "resolv_private.h" |
| 41 | #else |
| 42 | #include <resolv.h> |
| 43 | #endif |
| 44 | |
| 45 | static char |
| 46 | xtob(int c) { |
| 47 | return (c - (((c >= '0') && (c <= '9')) ? '0' : '7')); |
| 48 | } |
| 49 | |
| 50 | u_int |
| 51 | inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) { |
| 52 | u_char c, nib; |
| 53 | u_int len = 0; |
| 54 | |
| 55 | assert(ascii != NULL); |
| 56 | assert(binary != NULL); |
| 57 | |
| 58 | if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X')) |
| 59 | return (0); |
| 60 | ascii += 2; |
| 61 | |
| 62 | while ((c = *ascii++) != '\0' && len < (u_int)maxlen) { |
| 63 | if (c == '.' || c == '+' || c == '/') |
| 64 | continue; |
| 65 | if (!isascii(c)) |
| 66 | return (0); |
| 67 | if (islower(c)) |
| 68 | c = toupper(c); |
| 69 | if (isxdigit(c)) { |
| 70 | nib = xtob(c); |
| 71 | c = *ascii++; |
| 72 | if (c != '\0') { |
| 73 | c = toupper(c); |
| 74 | if (isxdigit(c)) { |
| 75 | *binary++ = (nib << 4) | xtob(c); |
| 76 | len++; |
| 77 | } else |
| 78 | return (0); |
| 79 | } |
| 80 | else |
| 81 | return (0); |
| 82 | } |
| 83 | else |
| 84 | return (0); |
| 85 | } |
| 86 | return (len); |
| 87 | } |
| 88 | |
| 89 | char * |
| 90 | inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) { |
| 91 | int nib; |
| 92 | int i; |
| 93 | static char tmpbuf[2+255*3]; |
| 94 | char *start; |
| 95 | |
| 96 | assert(binary != NULL); |
| 97 | |
| 98 | if (ascii) |
| 99 | start = ascii; |
| 100 | else { |
| 101 | ascii = tmpbuf; |
| 102 | start = tmpbuf; |
| 103 | } |
| 104 | |
| 105 | *ascii++ = '0'; |
| 106 | *ascii++ = 'x'; |
| 107 | |
| 108 | if (binlen > 255) |
| 109 | binlen = 255; |
| 110 | |
| 111 | for (i = 0; i < binlen; i++) { |
| 112 | nib = (u_int32_t)*binary >> 4; |
| 113 | *ascii++ = nib + (nib < 10 ? '0' : '7'); |
| 114 | nib = *binary++ & 0x0f; |
| 115 | *ascii++ = nib + (nib < 10 ? '0' : '7'); |
| 116 | if (((i % 2) == 0 && (i + 1) < binlen)) |
| 117 | *ascii++ = '.'; |
| 118 | } |
| 119 | *ascii = '\0'; |
| 120 | return (start); |
| 121 | } |