1 /* $NetBSD: control.c,v 1.8 2014/12/10 04:37:51 christos Exp $ */
2
3 /*
4 * Copyright (C) 2004-2007, 2009-2014 Internet Systems Consortium, Inc. ("ISC")
5 * Copyright (C) 2001-2003 Internet Software Consortium.
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
12 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
13 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
14 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
15 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
16 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
17 * PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 /* Id: control.c,v 1.49 2012/01/31 23:47:31 tbox Exp */
21
22 /*! \file */
23
24 #include <config.h>
25
26
27 #include <isc/app.h>
28 #include <isc/event.h>
29 #include <isc/mem.h>
30 #include <isc/string.h>
31 #include <isc/timer.h>
32 #include <isc/util.h>
33
34 #include <dns/result.h>
35
36 #include <isccc/alist.h>
37 #include <isccc/cc.h>
38 #include <isccc/result.h>
39
40 #include <named/control.h>
41 #include <named/log.h>
42 #include <named/os.h>
43 #include <named/server.h>
44 #ifdef HAVE_LIBSCF
45 #include <named/ns_smf_globals.h>
46 #endif
47
48 static isc_boolean_t
command_compare(const char * text,const char * command)49 command_compare(const char *text, const char *command) {
50 unsigned int commandlen = strlen(command);
51 if (strncasecmp(text, command, commandlen) == 0 &&
52 (text[commandlen] == '\0' ||
53 text[commandlen] == ' ' ||
54 text[commandlen] == '\t'))
55 return (ISC_TRUE);
56 return (ISC_FALSE);
57 }
58
59 /*%
60 * This function is called to process the incoming command
61 * when a control channel message is received.
62 */
63 isc_result_t
ns_control_docommand(isccc_sexpr_t * message,isc_buffer_t * text)64 ns_control_docommand(isccc_sexpr_t *message, isc_buffer_t *text) {
65 isccc_sexpr_t *data;
66 char *command = NULL;
67 isc_result_t result;
68 int log_level;
69 #ifdef HAVE_LIBSCF
70 ns_smf_want_disable = 0;
71 #endif
72
73 data = isccc_alist_lookup(message, "_data");
74 if (data == NULL) {
75 /*
76 * No data section.
77 */
78 return (ISC_R_FAILURE);
79 }
80
81 result = isccc_cc_lookupstring(data, "type", &command);
82 if (result != ISC_R_SUCCESS) {
83 /*
84 * We have no idea what this is.
85 */
86 return (result);
87 }
88
89 /*
90 * Compare the 'command' parameter against all known control commands.
91 */
92 if (command_compare(command, NS_COMMAND_NULL) ||
93 command_compare(command, NS_COMMAND_STATUS)) {
94 log_level = ISC_LOG_DEBUG(1);
95 } else {
96 log_level = ISC_LOG_INFO;
97 }
98 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
99 NS_LOGMODULE_CONTROL, log_level,
100 "received control channel command '%s'",
101 command);
102
103 if (command_compare(command, NS_COMMAND_RELOAD)) {
104 result = ns_server_reloadcommand(ns_g_server, command, text);
105 } else if (command_compare(command, NS_COMMAND_RECONFIG)) {
106 result = ns_server_reconfigcommand(ns_g_server, command);
107 } else if (command_compare(command, NS_COMMAND_REFRESH)) {
108 result = ns_server_refreshcommand(ns_g_server, command, text);
109 } else if (command_compare(command, NS_COMMAND_RETRANSFER)) {
110 result = ns_server_retransfercommand(ns_g_server,
111 command, text);
112 } else if (command_compare(command, NS_COMMAND_HALT)) {
113 #ifdef HAVE_LIBSCF
114 /*
115 * If we are managed by smf(5), AND in chroot, then
116 * we cannot connect to the smf repository, so just
117 * return with an appropriate message back to rndc.
118 */
119 if (ns_smf_got_instance == 1 && ns_smf_chroot == 1) {
120 result = ns_smf_add_message(text);
121 return (result);
122 }
123 /*
124 * If we are managed by smf(5) but not in chroot,
125 * try to disable ourselves the smf way.
126 */
127 if (ns_smf_got_instance == 1 && ns_smf_chroot == 0)
128 ns_smf_want_disable = 1;
129 /*
130 * If ns_smf_got_instance = 0, ns_smf_chroot
131 * is not relevant and we fall through to
132 * isc_app_shutdown below.
133 */
134 #endif
135 /* Do not flush master files */
136 ns_server_flushonshutdown(ns_g_server, ISC_FALSE);
137 ns_os_shutdownmsg(command, text);
138 isc_app_shutdown();
139 result = ISC_R_SUCCESS;
140 } else if (command_compare(command, NS_COMMAND_STOP)) {
141 /*
142 * "stop" is the same as "halt" except it does
143 * flush master files.
144 */
145 #ifdef HAVE_LIBSCF
146 if (ns_smf_got_instance == 1 && ns_smf_chroot == 1) {
147 result = ns_smf_add_message(text);
148 return (result);
149 }
150 if (ns_smf_got_instance == 1 && ns_smf_chroot == 0)
151 ns_smf_want_disable = 1;
152 #endif
153 ns_server_flushonshutdown(ns_g_server, ISC_TRUE);
154 ns_os_shutdownmsg(command, text);
155 isc_app_shutdown();
156 result = ISC_R_SUCCESS;
157 } else if (command_compare(command, NS_COMMAND_DUMPSTATS)) {
158 result = ns_server_dumpstats(ns_g_server);
159 } else if (command_compare(command, NS_COMMAND_QUERYLOG)) {
160 result = ns_server_togglequerylog(ns_g_server, command);
161 } else if (command_compare(command, NS_COMMAND_DUMPDB)) {
162 ns_server_dumpdb(ns_g_server, command);
163 result = ISC_R_SUCCESS;
164 } else if (command_compare(command, NS_COMMAND_SECROOTS)) {
165 result = ns_server_dumpsecroots(ns_g_server, command);
166 } else if (command_compare(command, NS_COMMAND_TRACE)) {
167 result = ns_server_setdebuglevel(ns_g_server, command);
168 } else if (command_compare(command, NS_COMMAND_NOTRACE)) {
169 ns_g_debuglevel = 0;
170 isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
171 result = ISC_R_SUCCESS;
172 } else if (command_compare(command, NS_COMMAND_FLUSH)) {
173 result = ns_server_flushcache(ns_g_server, command);
174 } else if (command_compare(command, NS_COMMAND_FLUSHNAME)) {
175 result = ns_server_flushnode(ns_g_server, command, ISC_FALSE);
176 } else if (command_compare(command, NS_COMMAND_FLUSHTREE)) {
177 result = ns_server_flushnode(ns_g_server, command, ISC_TRUE);
178 } else if (command_compare(command, NS_COMMAND_STATUS)) {
179 result = ns_server_status(ns_g_server, text);
180 } else if (command_compare(command, NS_COMMAND_TSIGLIST)) {
181 result = ns_server_tsiglist(ns_g_server, text);
182 } else if (command_compare(command, NS_COMMAND_TSIGDELETE)) {
183 result = ns_server_tsigdelete(ns_g_server, command, text);
184 } else if (command_compare(command, NS_COMMAND_FREEZE)) {
185 result = ns_server_freeze(ns_g_server, ISC_TRUE, command,
186 text);
187 } else if (command_compare(command, NS_COMMAND_UNFREEZE) ||
188 command_compare(command, NS_COMMAND_THAW)) {
189 result = ns_server_freeze(ns_g_server, ISC_FALSE, command,
190 text);
191 } else if (command_compare(command, NS_COMMAND_SCAN)) {
192 result = ISC_R_SUCCESS;
193 ns_server_scan_interfaces(ns_g_server);
194 } else if (command_compare(command, NS_COMMAND_SYNC)) {
195 result = ns_server_sync(ns_g_server, command, text);
196 } else if (command_compare(command, NS_COMMAND_RECURSING)) {
197 result = ns_server_dumprecursing(ns_g_server);
198 } else if (command_compare(command, NS_COMMAND_TIMERPOKE)) {
199 result = ISC_R_SUCCESS;
200 isc_timermgr_poke(ns_g_timermgr);
201 } else if (command_compare(command, NS_COMMAND_NULL)) {
202 result = ISC_R_SUCCESS;
203 } else if (command_compare(command, NS_COMMAND_NOTIFY)) {
204 result = ns_server_notifycommand(ns_g_server, command, text);
205 } else if (command_compare(command, NS_COMMAND_VALIDATION)) {
206 result = ns_server_validation(ns_g_server, command, text);
207 } else if (command_compare(command, NS_COMMAND_SIGN) ||
208 command_compare(command, NS_COMMAND_LOADKEYS)) {
209 result = ns_server_rekey(ns_g_server, command, text);
210 } else if (command_compare(command, NS_COMMAND_ADDZONE)) {
211 result = ns_server_add_zone(ns_g_server, command, text);
212 } else if (command_compare(command, NS_COMMAND_DELZONE)) {
213 result = ns_server_del_zone(ns_g_server, command, text);
214 } else if (command_compare(command, NS_COMMAND_SIGNING)) {
215 result = ns_server_signing(ns_g_server, command, text);
216 } else if (command_compare(command, NS_COMMAND_ZONESTATUS)) {
217 result = ns_server_zonestatus(ns_g_server, command, text);
218 } else {
219 isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
220 NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
221 "unknown control channel command '%s'",
222 command);
223 result = DNS_R_UNKNOWNCOMMAND;
224 }
225
226 return (result);
227 }
228