--- /dev/null
+/* interact.c
+
+ Text interactor for dhcp servers. */
+
+/*
+ * Copyright (c) 1998 The Internet Software Consortium.
+ * 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. Neither the name of The Internet Software Consortium 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 INTERNET SOFTWARE CONSORTIUM 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 INTERNET SOFTWARE CONSORTIUM 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.
+ *
+ * This software was written for the Internet Software Consortium by
+ * Ted Lemon <mellon@fugue.com> in cooperation with Vixie Enterprises.
+ * To learn more about the Internet Software Consortium, see
+ * ``http://www.vix.com/isc''. To learn more about Vixie Enterprises,
+ * see ``http://www.vix.com''.
+ */
+
+#ifndef lint
+static char copyright[] =
+"$Id: interact.c,v 1.1 1998/04/09 05:18:56 mellon Exp $ Copyright (c) 1998 The Internet Software Consortium. All rights reserved.\n";
+#endif /* not lint */
+
+#include "dhcpd.h"
+
+int interact_initialized;
+int interact_fd;
+static struct interact_client *interact_clients;
+
+void interact_startup ()
+{
+ struct sockaddr_un name;
+ static int once;
+ int len;
+ mode_t m;
+
+ /* Only initialize interact once. */
+ if (interact_initialized)
+ error ("attempted to reinitialize interact protocol");
+ interact_initialized = 1;
+
+ /* Make a socket... */
+ interact_fd = socket (AF_UNIX, SOCK_STREAM, 0);
+ if (interact_fd < 0)
+ error ("unable to create interact socket: %m");
+
+ /* XXX for now... */
+ name.sun_family = PF_UNIX;
+ strcpy (name.sun_path, "/var/run/dhcpctl");
+#if defined (HAVE_SA_LEN)
+ name.sun_len =
+#endif
+ len = ((sizeof name) - (sizeof name.sun_path) +
+ strlen (name.sun_path));
+ unlink (name.sun_path);
+
+ /* interact socket should be accessible only by root. */
+ m = umask (0700);
+
+ /* Bind to it... */
+ if (bind (interact_fd, (struct sockaddr *)&name, len) < 0) {
+ warn ("can't bind to interact socket: %m");
+ close (interact_fd);
+ umask (m);
+ return;
+ }
+ umask (m);
+
+ /* Listen for connections... */
+ if (listen (interact_fd, 1) < 0) {
+ warn ("can't listen on interact socket: %m");
+ close (interact_fd);
+ unlink (name.sun_path);
+ return;
+ }
+
+ add_protocol ("interact", interact_fd, new_interact_connection, 0);
+}
+
+void new_interact_connection (proto)
+ struct protocol *proto;
+{
+ struct sockaddr_un name;
+ int namelen;
+ struct interact_client *tmp;
+ int new_fd;
+ int arg;
+
+ tmp = (struct interact_client *)malloc (sizeof *tmp);
+ if (!tmp)
+ error ("Can't find memory for new client!");
+ memset (tmp, 0, sizeof *tmp);
+
+ namelen = sizeof name;
+ new_fd = accept (proto -> fd, (struct sockaddr *)&name, &namelen);
+ if (new_fd < 0) {
+ warn ("accept: %m");
+ free (tmp);
+ return;
+ }
+
+ if ((arg = fcntl (new_fd, F_GETFL, 0)) < 0) {
+ bad_flag:
+ warn ("Can't set flags on new interactive client: %m");
+ close (new_fd);
+ free (tmp);
+ return;
+ }
+ arg |= O_NONBLOCK;
+ if (fcntl (new_fd, F_SETFL, arg) < 0)
+ goto bad_flag;
+
+ tmp -> next = interact_clients;
+ tmp -> fd = new_fd;
+ interact_clients = tmp;
+ tmp -> cur_node_actions = top_level_actions;
+
+ tmp -> proto = add_protocol ("aclient", new_fd,
+ interact_client_input, tmp);
+}
+
+void interact_client_input (proto)
+ struct protocol *proto;
+{
+ int status;
+ char *eobuf;
+ struct interact_client *client = proto -> local;
+
+ status = read (proto -> fd, &client -> ibuf [client -> ibuflen],
+ (sizeof client -> ibuf) - client -> ibuflen);
+ if (status < 0) {
+ warn ("interact_client_input: %m");
+ blow:
+ close (proto -> fd);
+ remove_protocol (proto);
+ free (client);
+ return;
+ }
+ /* EOF: get lost. */
+ if (status == 0)
+ goto blow;
+
+ client -> ibuflen += status;
+ eobuf = memchr (client -> ibuf, '\n', client -> ibuflen);
+ if (!eobuf) {
+ if (client -> ibuflen == sizeof client -> ibuf) {
+ warn ("interact_client_input: buffer overflow.");
+ goto blow;
+ }
+ return;
+ }
+
+ /* NUL terminate and blow away newline. */
+ *eobuf = 0;
+
+ if (!strcmp (client -> ibuf, "ls"))
+ (*client -> cur_node_actions.ls) (client);
+ else if (!strncmp (client -> ibuf, "print ", 6))
+ (*client -> cur_node_actions.print) (client,
+ &client -> ibuf [6]);
+ else if (!strncmp (client -> ibuf, "set ", 4))
+ (*client -> cur_node_actions.set) (client,
+ &client -> ibuf [4]);
+ else if (!strncmp (client -> ibuf, "rm ", 3))
+ (*client -> cur_node_actions.rm) (client,
+ &client -> ibuf [3]);
+ else if (!strcmp (client -> ibuf, "cd .."))
+ (*client -> cur_node_actions.cdup) (client);
+ else if (!strncmp (client -> ibuf, "cd ", 3))
+ (*client -> cur_node_actions.cd) (client,
+ &client -> ibuf [3]);
+ else if (!strcmp (client -> ibuf, "exit")) {
+ interact_client_write (client, "done.", 1);
+ goto blow;
+ } else
+ interact_client_write (client, "invalid command", 1);
+
+ /* In case the client wrote more than one command. */
+ if (client -> ibuflen -= eobuf - &client -> ibuf [0] + 1)
+ memmove (client -> ibuf, eobuf, client -> ibuflen);
+}
+
+int interact_client_write (client, string, lastp)
+ struct interact_client *client;
+ char *string;
+ int lastp;
+{
+ static char *obuf;
+ static int obufmax;
+ char *bp;
+
+ /* Unlikely to loop, but why not be sure? */
+ if (obufmax < strlen (string)) {
+ if (obuf)
+ free (obuf);
+ obufmax = (strlen (string) + 1025) & ~1023;
+ obuf = malloc (obufmax);
+ if (!obuf) {
+ warn ("interact_client_write: out of memory");
+ blow:
+ close (client -> proto -> fd);
+ remove_protocol (client -> proto);
+ free (client);
+ return 0;
+ }
+ }
+
+ bp = obuf;
+ if (!lastp)
+ *bp++ = '-';
+ strcpy (bp, string);
+ bp += strlen (bp);
+ *bp++ = '\n';
+ if (write (client -> fd, obuf, bp - obuf) < 0)
+ return 0;
+
+ return 1;
+}
projects / thirdparty / dhcp.git / commitdiff
