diff options
Diffstat (limited to 'lib/libc/net/gethostbyht.c')
| -rw-r--r-- | lib/libc/net/gethostbyht.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/lib/libc/net/gethostbyht.c b/lib/libc/net/gethostbyht.c new file mode 100644 index 0000000..78e0c30 --- /dev/null +++ b/lib/libc/net/gethostbyht.c @@ -0,0 +1,182 @@ +/*- + * 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: gethostnamadr.c,v 1.1 1994/05/27 04:57:16 rgrimes Exp $"; +#endif /* LIBC_SCCS and not lint */ + +#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 <errno.h> +#include <string.h> + +#define MAXALIASES 35 +#define MAXADDRS 35 + +static struct hostent host; +static char *host_aliases[MAXALIASES]; +static char hostbuf[BUFSIZ+1]; +static FILE *hostf = NULL; +static char hostaddr[MAXADDRS]; +static char *host_addrs[2]; +static int stayopen = 0; + +void +_sethosthtent(f) + int f; +{ + if (hostf == NULL) + hostf = fopen(_PATH_HOSTS, "r" ); + else + rewind(hostf); + stayopen |= f; +} + +void +_endhosthtent() +{ + if (hostf && !stayopen) { + (void) fclose(hostf); + hostf = NULL; + } +} + +struct hostent * +gethostent() +{ + char *p; + register char *cp, **q; + + if (hostf == NULL && (hostf = fopen(_PATH_HOSTS, "r" )) == NULL) + return (NULL); +again: + if ((p = fgets(hostbuf, BUFSIZ, hostf)) == NULL) + return (NULL); + if (*p == '#') + goto again; + cp = strpbrk(p, "#\n"); + if (cp == NULL) + goto again; + *cp = '\0'; + cp = strpbrk(p, " \t"); + if (cp == NULL) + goto again; + *cp++ = '\0'; + /* THIS STUFF IS INTERNET SPECIFIC */ + host.h_addr_list = host_addrs; + host.h_addr = hostaddr; + *((u_int32_t *)host.h_addr) = inet_addr(p); + host.h_length = sizeof (u_int32_t); + host.h_addrtype = AF_INET; + while (*cp == ' ' || *cp == '\t') + cp++; + host.h_name = cp; + q = host.h_aliases = host_aliases; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + while (cp && *cp) { + if (*cp == ' ' || *cp == '\t') { + cp++; + continue; + } + if (q < &host_aliases[MAXALIASES - 1]) + *q++ = cp; + cp = strpbrk(cp, " \t"); + if (cp != NULL) + *cp++ = '\0'; + } + *q = NULL; + return (&host); +} + +struct hostent * +_gethostbyhtname(name) + char *name; +{ + register struct hostent *p; + register char **cp; + + sethostent(0); + while ((p = gethostent())) { + if (strcasecmp(p->h_name, name) == 0) + break; + for (cp = p->h_aliases; *cp != 0; cp++) + if (strcasecmp(*cp, name) == 0) + goto found; + } +found: + endhostent(); + return (p); +} + +struct hostent * +_gethostbyhtaddr(addr, len, type) + const char *addr; + int len, type; +{ + register struct hostent *p; + + sethostent(0); + while ((p = gethostent())) + if (p->h_addrtype == type && !bcmp(p->h_addr, addr, len)) + break; + endhostent(); + return (p); +} |
