From 39e6e65a2c5a3312f365d59f23c469641e049c82 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Wed, 19 Aug 1998 21:32:28 +0000 Subject: Base files --- c/src/libnetworking/libc/gethostnamadr.c | 224 +++++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 c/src/libnetworking/libc/gethostnamadr.c (limited to 'c/src/libnetworking/libc/gethostnamadr.c') diff --git a/c/src/libnetworking/libc/gethostnamadr.c b/c/src/libnetworking/libc/gethostnamadr.c new file mode 100644 index 0000000000..2ad832f4b1 --- /dev/null +++ b/c/src/libnetworking/libc/gethostnamadr.c @@ -0,0 +1,224 @@ +/*- + * Copyright (c) 1994, Garrett Wollman + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE 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. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)$Id$"; +static char rcsid[] = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include /* XXX hack for _res */ +#include /* XXX hack for _res */ + +#define _PATH_HOSTCONF "/etc/host.conf" + +enum service_type { + SERVICE_NONE = 0, + SERVICE_BIND, + SERVICE_HOSTS, + SERVICE_NIS }; +#define SERVICE_MAX SERVICE_NIS + +static struct { + const char *name; + enum service_type type; +} service_names[] = { + { "hosts", SERVICE_HOSTS }, + { "/etc/hosts", SERVICE_HOSTS }, + { "hosttable", SERVICE_HOSTS }, + { "htable", SERVICE_HOSTS }, + { "bind", SERVICE_BIND }, + { "dns", SERVICE_BIND }, + { "domain", SERVICE_BIND }, + { "yp", SERVICE_NIS }, + { "yellowpages", SERVICE_NIS }, + { "nis", SERVICE_NIS }, + { 0, SERVICE_NONE } +}; + +static enum service_type service_order[SERVICE_MAX + 1]; +static int service_done = 0; + +static enum service_type +get_service_name(const char *name) { + int i; + for(i = 0; service_names[i].type != SERVICE_NONE; i++) { + if(!strcasecmp(name, service_names[i].name)) { + return service_names[i].type; + } + } + return SERVICE_NONE; +} + +static void +init_services() +{ + char *cp, *p, buf[BUFSIZ]; + register int cc = 0; + FILE *fd; + + if ((fd = (FILE *)fopen(_PATH_HOSTCONF, "r")) == NULL) { + /* make some assumptions */ + service_order[0] = SERVICE_BIND; + service_order[1] = SERVICE_HOSTS; + service_order[2] = SERVICE_NONE; + } else { + while (fgets(buf, BUFSIZ, fd) != NULL && cc < SERVICE_MAX) { + if(buf[0] == '#') + continue; + + p = buf; + while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0') + ; + if (cp == NULL) + continue; + do { + if (isalpha(cp[0])) { + service_order[cc] = get_service_name(cp); + if(service_order[cc] != SERVICE_NONE) + cc++; + } + while ((cp = strsep(&p, "\n \t,:;")) != NULL && *cp == '\0') + ; + } while(cp != NULL && cc < SERVICE_MAX); + } + service_order[cc] = SERVICE_NONE; + fclose(fd); + } + service_done = 1; +} + +struct hostent * +gethostbyname(const char *name) +{ + struct hostent *hp; + + if (_res.options & RES_USE_INET6) { /* XXX */ + hp = gethostbyname2(name, AF_INET6); /* XXX */ + if (hp) /* XXX */ + return (hp); /* XXX */ + } /* XXX */ + return (gethostbyname2(name, AF_INET)); +} + +struct hostent * +gethostbyname2(const char *name, int type) +{ + struct hostent *hp = 0; + int nserv = 0; + + if (!service_done) + init_services(); + + while (!hp) { + switch (service_order[nserv]) { + case SERVICE_NONE: + return NULL; + case SERVICE_HOSTS: + hp = _gethostbyhtname(name, type); + break; + case SERVICE_BIND: + hp = _gethostbydnsname(name, type); + break; + case SERVICE_NIS: + hp = _gethostbynisname(name, type); + break; + } + nserv++; + } + return hp; +} + +struct hostent * +gethostbyaddr(const char *addr, int len, int type) +{ + struct hostent *hp = 0; + int nserv = 0; + + if (!service_done) + init_services(); + + while (!hp) { + switch (service_order[nserv]) { + case SERVICE_NONE: + return 0; + case SERVICE_HOSTS: + hp = _gethostbyhtaddr(addr, len, type); + break; + case SERVICE_BIND: + hp = _gethostbydnsaddr(addr, len, type); + break; + case SERVICE_NIS: + hp = _gethostbynisaddr(addr, len, type); + break; + } + nserv++; + } + return hp; +} + +#ifdef _THREAD_SAFE +struct hostent_data; + +/* + * Temporary function (not thread safe) + */ +int gethostbyaddr_r(const char *addr, int len, int type, + struct hostent *result, struct hostent_data *buffer) +{ + struct hostent *hp; + int ret; + if ((hp = gethostbyaddr(addr, len, type)) == NULL) { + ret = -1; + } else { + memcpy(result, hp, sizeof(struct hostent)); + ret = 0; + } + return(ret); +} +#endif + +void +sethostent(stayopen) + int stayopen; +{ + _sethosthtent(stayopen); + _sethostdnsent(stayopen); +} + +void +endhostent() +{ + _endhosthtent(); + _endhostdnsent(); +} -- cgit v1.2.3