summaryrefslogtreecommitdiffstats
path: root/c/src/libnetworking/libc/gethostnamadr.c
diff options
context:
space:
mode:
Diffstat (limited to 'c/src/libnetworking/libc/gethostnamadr.c')
-rw-r--r--c/src/libnetworking/libc/gethostnamadr.c224
1 files changed, 224 insertions, 0 deletions
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 <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>
+#include <arpa/nameser.h> /* XXX hack for _res */
+#include <resolv.h> /* 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();
+}