diff options
Diffstat (limited to 'c/src/libnetworking/libc/map_v4v6.c')
| -rw-r--r-- | c/src/libnetworking/libc/map_v4v6.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/c/src/libnetworking/libc/map_v4v6.c b/c/src/libnetworking/libc/map_v4v6.c new file mode 100644 index 0000000000..0f8658e117 --- /dev/null +++ b/c/src/libnetworking/libc/map_v4v6.c @@ -0,0 +1,128 @@ +/* + * ++Copyright++ 1985, 1988, 1993 + * - + * Copyright (c) 1985, 1988, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * - + * Portions Copyright (c) 1993 by Digital Equipment Corporation. + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies, and that + * the name of Digital Equipment Corporation not be used in advertising or + * publicity pertaining to distribution of the document or software without + * specific, written prior permission. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT + * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS + * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS + * SOFTWARE. + * - + * --Copyright-- + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93"; +static char rcsid[] = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <arpa/nameser.h> + +#include <stdio.h> +#include <string.h> +#include <netdb.h> +#include <resolv.h> +#include <ctype.h> +#include <errno.h> +#include <syslog.h> + +typedef union { + int32_t al; + char ac; +} align; + +void +_map_v4v6_address(src, dst) + const char *src; + char *dst; +{ + u_char *p = (u_char *)dst; + char tmp[INADDRSZ]; + int i; + + /* Stash a temporary copy so our caller can update in place. */ + bcopy(src, tmp, INADDRSZ); + /* Mark this ipv6 addr as a mapped ipv4. */ + for (i = 0; i < 10; i++) + *p++ = 0x00; + *p++ = 0xff; + *p++ = 0xff; + /* Retrieve the saved copy and we're done. */ + bcopy(tmp, (void*)p, INADDRSZ); +} + +void +_map_v4v6_hostent(hp, bpp, lenp) + struct hostent *hp; + char **bpp; + int *lenp; +{ + char **ap; + + if (hp->h_addrtype != AF_INET || hp->h_length != INADDRSZ) + return; + hp->h_addrtype = AF_INET6; + hp->h_length = IN6ADDRSZ; + for (ap = hp->h_addr_list; *ap; ap++) { + int i = sizeof(align) - ((u_long)*bpp % sizeof(align)); + + if (*lenp < (i + IN6ADDRSZ)) { + /* Out of memory. Truncate address list here. XXX */ + *ap = NULL; + return; + } + *bpp += i; + *lenp -= i; + _map_v4v6_address(*ap, *bpp); + *ap = *bpp; + *bpp += IN6ADDRSZ; + *lenp -= IN6ADDRSZ; + } +} |