9 #include <sys/socket.h>
10 #include <arpa/inet.h>
17 /* XXX should be from autoconf */
18 static const char *configfile
="/etc/secnet/secnet.conf";
19 static const char *sites_key
="sites";
20 bool_t just_check_config
=False
;
21 static char *userid
=NULL
;
23 bool_t background
=True
;
24 static char *pidfile
=NULL
;
25 bool_t require_root_privileges
=False
;
26 cstring_t require_root_privileges_explanation
=NULL
;
28 static pid_t secnet_pid
;
30 /* Structures dealing with poll() call */
31 struct poll_interest
{
32 beforepoll_fn
*before
;
38 struct poll_interest
*next
;
40 static struct poll_interest
*reg
=NULL
;
41 static uint32_t total_nfds
=10;
43 static bool_t finished
=False
;
45 /* Parse the command line options */
46 static void parse_options(int argc
, char **argv
)
52 static struct option long_options
[] = {
53 {"verbose", 0, 0, 'v'},
54 {"nowarnings", 0, 0, 'w'},
57 {"nodetach", 0, 0, 'n'},
58 {"silent", 0, 0, 'f'},
61 {"config", 1, 0, 'c'},
62 {"just-check-config", 0, 0, 'j'},
63 {"sites-key", 1, 0, 's'},
67 c
=getopt_long(argc
, argv
, "vwdnjc:ft:s:",
68 long_options
, &option_index
);
75 printf("Usage: secnet [OPTION]...\n\n"
76 " -f, --silent, --quiet suppress error messages\n"
77 " -w, --nowarnings suppress warnings\n"
78 " -v, --verbose output extra diagnostics\n"
79 " -c, --config=filename specify a configuration file\n"
80 " -j, --just-check-config stop after reading "
81 "configuration file\n"
82 " -s, --sites-key=name configuration key that "
83 "specifies active sites\n"
84 " -n, --nodetach do not run in background\n"
85 " -d, --debug=item,... set debug options\n"
86 " --help display this help and exit\n"
87 " --version output version information "
95 printf("%s\n",version
);
100 message_level
|=M_INFO
|M_NOTICE
|M_WARNING
|M_ERR
|M_SECURITY
|
105 message_level
&=(~M_WARNING
);
109 message_level
|=M_DEBUG_CONFIG
|M_DEBUG_PHASE
|M_DEBUG
;
113 message_level
=M_FATAL
;
122 configfile
=safe_strdup(optarg
,"config_filename");
124 fatal("secnet: no config filename specified");
128 just_check_config
=True
;
133 sites_key
=safe_strdup(optarg
,"sites-key");
135 fatal("secnet: no sites key specified");
142 Message(M_ERR
,"secnet: Unknown getopt code %c\n",c
);
146 if (argc
-optind
!= 0) {
147 Message(M_ERR
,"secnet: You gave extra command line parameters, "
148 "which were ignored.\n");
152 static void setup(dict_t
*config
)
161 l
=dict_lookup(config
,"system");
163 if (!l
|| list_elem(l
,0)->type
!=t_dict
) {
164 fatal("configuration does not include a \"system\" dictionary");
166 system
=list_elem(l
,0)->data
.dict
;
167 loc
=list_elem(l
,0)->loc
;
169 /* Arrange systemwide log facility */
170 l
=dict_lookup(system
,"log");
172 fatal("configuration does not include a system/log facility");
174 system_log
=init_log(l
);
176 /* Who are we supposed to run as? */
177 userid
=dict_read_string(system
,"userid",False
,"system",loc
);
181 if (pw
&& strcmp(pw
->pw_name
,userid
)==0) {
188 fatal("userid \"%s\" not found",userid
);
193 pidfile
=dict_read_string(system
,"pidfile",False
,"system",loc
);
195 /* Check whether we need root privileges */
196 if (require_root_privileges
&& uid
!=0) {
197 fatal("the configured feature \"%s\" requires "
198 "that secnet retain root privileges while running.",
199 require_root_privileges_explanation
);
202 /* Go along site list, starting sites */
203 l
=dict_lookup(config
,sites_key
);
205 Message(M_WARNING
,"secnet: configuration key \"%s\" is missing; no "
206 "remote sites are defined\n",sites_key
);
209 while ((site
=list_elem(l
, i
++))) {
211 if (site
->type
!=t_closure
) {
212 cfgfatal(site
->loc
,"system","non-closure in site list");
214 if (site
->data
.closure
->type
!=CL_SITE
) {
215 cfgfatal(site
->loc
,"system","non-site closure in site list");
217 s
=site
->data
.closure
->interface
;
218 s
->control(s
->st
,True
);
223 void register_for_poll(void *st
, beforepoll_fn
*before
,
224 afterpoll_fn
*after
, uint32_t max_nfds
, cstring_t desc
)
226 struct poll_interest
*i
;
228 i
=safe_malloc(sizeof(*i
),"register_for_poll");
232 i
->max_nfds
=max_nfds
;
235 assert(total_nfds
< INT_MAX
- max_nfds
);
236 total_nfds
+=max_nfds
;
242 static void system_phase_hook(void *sst
, uint32_t newphase
)
244 if (newphase
==PHASE_SHUTDOWN
&& pidfile
) {
245 /* Try to unlink the pidfile; don't care if it fails */
250 static void run(void)
252 struct timeval tv_now
;
254 struct poll_interest
*i
;
255 int rv
, nfds
, remain
, idx
;
259 fds
=safe_malloc(sizeof(*fds
)*total_nfds
, "run");
261 Message(M_NOTICE
,"%s [%d]: starting\n",version
,secnet_pid
);
264 if (gettimeofday(&tv_now
, NULL
)!=0) {
265 fatal_perror("main loop: gettimeofday");
267 now
=((uint64_t)tv_now
.tv_sec
*(uint64_t)1000)+
268 ((uint64_t)tv_now
.tv_usec
/(uint64_t)1000);
270 for (i
=reg
; i
; i
=i
->next
) {
271 i
->after(i
->state
, fds
+idx
, i
->nfds
, &tv_now
, &now
);
277 for (i
=reg
; i
; i
=i
->next
) {
279 rv
=i
->before(i
->state
, fds
+idx
, &nfds
, &timeout
, &tv_now
, &now
);
281 /* XXX we need to handle this properly: increase the
283 fatal("run: beforepoll_fn (%s) returns %d",i
->desc
,rv
);
286 fatal("run: beforepoll_fn (%s) set timeout to %d",timeout
);
294 rv
=poll(fds
, idx
, timeout
);
297 fatal_perror("run: poll");
305 static void droppriv(void)
311 add_hook(PHASE_SHUTDOWN
,system_phase_hook
,NULL
);
313 /* Open the pidfile for writing now: we may be unable to do so
314 once we drop privileges. */
316 pf
=fopen(pidfile
,"w");
318 fatal_perror("cannot open pidfile \"%s\"",pidfile
);
321 if (!background
&& pf
) {
322 fprintf(pf
,"%d\n",getpid());
326 /* Now drop privileges */
328 if (setuid(uid
)!=0) {
329 fatal_perror("can't set uid to \"%s\"",userid
);
336 /* Parent process - write pidfile, exit */
337 fprintf(pf
,"%d\n",p
);
342 /* Child process - all done, just carry on */
344 /* Close stdin and stdout; we don't need them any more.
345 stderr is redirected to the system/log facility */
346 if (pipe(errfds
)!=0) {
347 fatal_perror("can't create pipe for stderr");
355 secnet_is_daemon
=True
;
357 log_from_fd(errfds
[0],"stderr",system_log
);
360 fatal_perror("cannot fork");
367 static signal_notify_fn finish
,ignore_hup
;
368 static void finish(void *st
, int signum
)
371 Message(M_NOTICE
,"%s [%d]: received %s\n",version
,secnet_pid
,(string_t
)st
);
373 static void ignore_hup(void *st
, int signum
)
375 Message(M_INFO
,"%s [%d]: received SIGHUP\n",version
,secnet_pid
);
379 int main(int argc
, char **argv
)
383 enter_phase(PHASE_GETOPTS
);
384 parse_options(argc
,argv
);
386 enter_phase(PHASE_READCONFIG
);
387 config
=read_conffile(configfile
);
389 enter_phase(PHASE_SETUP
);
392 if (just_check_config
) {
393 Message(M_INFO
,"configuration file check complete\n");
397 enter_phase(PHASE_GETRESOURCES
);
398 /* Appropriate phase hooks will have been run */
400 enter_phase(PHASE_DROPPRIV
);
403 start_signal_handling();
404 request_signal_notification(SIGTERM
,finish
,safe_strdup("SIGTERM","run"));
405 if (!background
) request_signal_notification(SIGINT
,finish
,
406 safe_strdup("SIGINT","run"));
407 request_signal_notification(SIGHUP
,ignore_hup
,NULL
);
408 enter_phase(PHASE_RUN
);
411 enter_phase(PHASE_SHUTDOWN
);
412 Message(M_NOTICE
,"%s [%d]: finished\n",version
,secnet_pid
);