diff options
Diffstat (limited to 'newlib/libc/sys/linux/net/gethostbyht.c')
| -rw-r--r-- | newlib/libc/sys/linux/net/gethostbyht.c | 285 |
1 files changed, 285 insertions, 0 deletions
diff --git a/newlib/libc/sys/linux/net/gethostbyht.c b/newlib/libc/sys/linux/net/gethostbyht.c new file mode 100644 index 000000000..4a15293dd --- /dev/null +++ b/newlib/libc/sys/linux/net/gethostbyht.c @@ -0,0 +1,285 @@ +/*- + * 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"; +#endif /* LIBC_SCCS and not lint */ +#include <sys/cdefs.h> +#include <sys/types.h> + +#include <sys/param.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include <stdarg.h> +#include <nsswitch.h> +#include <arpa/nameser.h> /* XXX */ +#include <resolv.h> /* XXX */ +#include <dirent.h> +#include <stdlib.h> +#include <errno.h> + +static FILE *hostf = NULL; +static int stayopen = 0; +__LOCK_INIT(static, host_lock); + +void +_sethosthtent_r(int f, FILE **hostfile, int *hstayopen) +{ + if (!*hostfile) + *hostfile = fopen(_PATH_HOSTS, "r" ); + else + rewind(*hostfile); + *hstayopen = f; +} + +void +_endhosthtent_r(FILE **hostfile, int *hstayopen) +{ + if (*hostfile && !*hstayopen) { + (void) fclose(*hostfile); + *hostfile = NULL; + } +} + +void +_sethosthtent(f) + int f; +{ + _sethosthtent_r(f, &hostf, &stayopen); +} + +void +_endhosthtent() +{ + _endhosthtent_r(&hostf, &stayopen); +} + +struct hostent * +gethostent() +{ + static struct hostent hp; + static char buffer[BUFSIZ+1]; + static int len = BUFSIZ; + static int herr; + +#ifdef HAVE_DD_LOCK + __lock_acquire(host_lock); +#endif + gethostent_r(&hp, buffer, len, &herr, &hostf); +#ifdef HAVE_DD_LOCK + __lock_release(host_lock); +#endif + return &hp; +} + +int +gethostent_r(struct hostent *hp, char *buffer, int buflen, int *herr, FILE **hostfile) +{ + char *p; + char *cp, **q; + int af, len; + + if (!*hostfile && !(*hostfile = fopen(_PATH_HOSTS, "r" ))) { + *herr = NETDB_INTERNAL; + return -1; + } + again: + if (!(p = fgets(buffer, buflen, *hostfile))) { + *herr = HOST_NOT_FOUND; + return -1; + } + if (*p == '#') + goto again; + if (!(cp = strpbrk(p, "#\n"))) + goto again; + *cp = '\0'; + if (!(cp = strpbrk(p, " \t"))) + goto again; + *cp++ = '\0'; + + hp->h_addr_list = hp->__host_addrs; + hp->__host_addrs[0] = (char *)hp->__host_addr; + + if (inet_pton(AF_INET6, p, hp->h_addr_list[0]) > 0) { + af = AF_INET6; + len = IN6ADDRSZ; + } else if (inet_pton(AF_INET, p, hp->h_addr_list[0]) > 0) { + if (_res.options & RES_USE_INET6) { + _map_v4v6_address(hp->h_addr_list[0], hp->h_addr_list[0]); + af = AF_INET6; + len = IN6ADDRSZ; + } else { + af = AF_INET; + len = INADDRSZ; + } + } else { + goto again; + } + + + hp->h_addr_list[1] = NULL; + hp->h_addr = hp->__host_addrs[0]; + hp->h_length = len; + hp->h_addrtype = af; + + while (*cp == ' ' || *cp == '\t') + cp++; + hp->h_name = cp; + q = hp->h_aliases = hp->__host_aliases; + if ((cp = strpbrk(cp, " \t")) != NULL) + *cp++ = '\0'; + while (cp && *cp) { + if (*cp == ' ' || *cp == '\t') { + cp++; + continue; + } + if (q < &hp->h_aliases[MAXALIASES - 1]) + *q++ = cp; + if ((cp = strpbrk(cp, " \t")) != NULL) + *cp++ = '\0'; + } + *q = NULL; + + *herr = NETDB_SUCCESS; + return 0; +} + +int +_ht_gethostbyname(void *rval, void *cb_data, va_list ap) +{ + char **cp; + const char *name; + int af; + struct hostent *resultbuf; + char *buf; + int buflen; + int *herr; + FILE *hostfile = NULL; + int stayopen; + int p; + + name = va_arg(ap, const char *); + af = va_arg(ap, int); + resultbuf = va_arg(ap, struct hostent *); + buf = va_arg(ap, char *); + buflen = va_arg(ap, int); + herr = va_arg(ap, int *); + + sethostent_r(0, &hostfile, &stayopen); + while ((p = gethostent_r(resultbuf, buf, buflen, herr, &hostfile)) != -1) { + if (resultbuf->h_addrtype != af) + continue; + if (strcasecmp(resultbuf->h_name, name) == 0) + break; + for (cp = resultbuf->h_aliases; *cp != 0; cp++) + if (strcasecmp(*cp, name) == 0) + goto found; + } +found: + endhostent_r(&hostfile, &stayopen); + + if (p == -1) + { + *(struct hostent **)rval = NULL; + return NS_NOTFOUND; + } + else + { + *(struct hostent **)rval = resultbuf; + return NS_SUCCESS; + } +} + +int +_ht_gethostbyaddr(void *rval, void *cb_data, va_list ap) +{ + const char *addr; + int len, af; + struct hostent *resultbuf; + char *buf; + int buflen; + int *herr; + FILE *hostfile = NULL; + int stayopen; + int p; + + addr = va_arg(ap, const char *); + len = va_arg(ap, int); + af = va_arg(ap, int); + resultbuf = va_arg(ap, struct hostent *); + buf = va_arg(ap, char *); + buflen = va_arg(ap, int); + herr = va_arg(ap, int *); + + sethostent_r(0, &hostfile, &stayopen); + while ((p = gethostent_r(resultbuf, buf, buflen, herr, &hostfile)) != -1) + if (resultbuf->h_addrtype == af && !memcmp(resultbuf->h_addr, addr, len)) + break; + endhostent_r(&hostfile, &stayopen); + + if (p == -1) + { + *(struct hostent **)rval = NULL; + return NS_NOTFOUND; + } + else + { + *(struct hostent **)rval = resultbuf; + return NS_SUCCESS; + } +} |