1 | /* |
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2 | * ++Copyright++ 1985, 1988, 1993 |
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3 | * - |
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4 | * Copyright (c) 1985, 1988, 1993 |
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5 | * The Regents of the University of California. All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without |
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8 | * modification, are permitted provided that the following conditions |
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9 | * are met: |
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10 | * 1. Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * 2. Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * 3. All advertising materials mentioning features or use of this software |
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16 | * must display the following acknowledgement: |
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17 | * This product includes software developed by the University of |
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18 | * California, Berkeley and its contributors. |
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19 | * 4. Neither the name of the University nor the names of its contributors |
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20 | * may be used to endorse or promote products derived from this software |
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21 | * without specific prior written permission. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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33 | * SUCH DAMAGE. |
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34 | * - |
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35 | * Portions Copyright (c) 1993 by Digital Equipment Corporation. |
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36 | * |
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37 | * Permission to use, copy, modify, and distribute this software for any |
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38 | * purpose with or without fee is hereby granted, provided that the above |
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39 | * copyright notice and this permission notice appear in all copies, and that |
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40 | * the name of Digital Equipment Corporation not be used in advertising or |
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41 | * publicity pertaining to distribution of the document or software without |
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42 | * specific, written prior permission. |
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43 | * |
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44 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL |
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45 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES |
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46 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT |
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47 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
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48 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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49 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
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50 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
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51 | * SOFTWARE. |
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52 | * - |
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53 | * --Copyright-- |
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54 | */ |
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55 | |
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56 | #if defined(LIBC_SCCS) && !defined(lint) |
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57 | static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93"; |
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58 | static char rcsid[] = "$Id$"; |
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59 | #endif /* LIBC_SCCS and not lint */ |
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60 | |
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61 | #include <sys/types.h> |
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62 | #include <sys/param.h> |
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63 | #include <sys/socket.h> |
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64 | #include <netinet/in.h> |
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65 | #include <arpa/inet.h> |
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66 | #include <arpa/nameser.h> |
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67 | |
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68 | #include <stdio.h> |
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69 | #include <string.h> |
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70 | #include <netdb.h> |
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71 | #include <resolv.h> |
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72 | #include <ctype.h> |
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73 | #include <errno.h> |
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74 | #include <syslog.h> |
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75 | |
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76 | typedef union { |
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77 | int32_t al; |
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78 | char ac; |
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79 | } align; |
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80 | |
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81 | void |
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82 | _map_v4v6_address(src, dst) |
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83 | const char *src; |
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84 | char *dst; |
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85 | { |
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86 | u_char *p = (u_char *)dst; |
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87 | char tmp[INADDRSZ]; |
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88 | int i; |
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89 | |
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90 | /* Stash a temporary copy so our caller can update in place. */ |
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91 | bcopy(src, tmp, INADDRSZ); |
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92 | /* Mark this ipv6 addr as a mapped ipv4. */ |
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93 | for (i = 0; i < 10; i++) |
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94 | *p++ = 0x00; |
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95 | *p++ = 0xff; |
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96 | *p++ = 0xff; |
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97 | /* Retrieve the saved copy and we're done. */ |
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98 | bcopy(tmp, (void*)p, INADDRSZ); |
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99 | } |
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100 | |
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101 | void |
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102 | _map_v4v6_hostent(hp, bpp, lenp) |
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103 | struct hostent *hp; |
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104 | char **bpp; |
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105 | int *lenp; |
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106 | { |
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107 | char **ap; |
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108 | |
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109 | if (hp->h_addrtype != AF_INET || hp->h_length != INADDRSZ) |
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110 | return; |
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111 | hp->h_addrtype = AF_INET6; |
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112 | hp->h_length = IN6ADDRSZ; |
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113 | for (ap = hp->h_addr_list; *ap; ap++) { |
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114 | int i = sizeof(align) - ((u_long)*bpp % sizeof(align)); |
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115 | |
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116 | if (*lenp < (i + IN6ADDRSZ)) { |
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117 | /* Out of memory. Truncate address list here. XXX */ |
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118 | *ap = NULL; |
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119 | return; |
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120 | } |
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121 | *bpp += i; |
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122 | *lenp -= i; |
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123 | _map_v4v6_address(*ap, *bpp); |
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124 | *ap = *bpp; |
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125 | *bpp += IN6ADDRSZ; |
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126 | *lenp -= IN6ADDRSZ; |
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127 | } |
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128 | } |
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