9 #include <sys/socket.h>
10 #include <arpa/inet.h>
18 /* apple's poll() does not work on char devs */
22 /* XXX should be from autoconf */
23 static const char *configfile
="/etc/secnet/secnet.conf";
24 static const char *sites_key
="sites";
25 bool_t just_check_config
=False
;
26 static char *userid
=NULL
;
28 bool_t background
=True
;
29 static char *pidfile
=NULL
;
30 bool_t require_root_privileges
=False
;
31 cstring_t require_root_privileges_explanation
=NULL
;
33 static pid_t secnet_pid
;
35 /* Structures dealing with poll() call */
36 struct poll_interest
{
37 beforepoll_fn
*before
;
43 struct poll_interest
*next
;
45 static struct poll_interest
*reg
=NULL
;
46 static int32_t total_nfds
=10;
48 static bool_t finished
=False
;
50 /* Parse the command line options */
51 static void parse_options(int argc
, char **argv
)
57 static struct option long_options
[] = {
58 {"verbose", 0, 0, 'v'},
59 {"nowarnings", 0, 0, 'w'},
62 {"nodetach", 0, 0, 'n'},
63 {"silent", 0, 0, 'f'},
66 {"config", 1, 0, 'c'},
67 {"just-check-config", 0, 0, 'j'},
68 {"sites-key", 1, 0, 's'},
72 c
=getopt_long(argc
, argv
, "vwdnjc:ft:s:",
73 long_options
, &option_index
);
80 printf("Usage: secnet [OPTION]...\n\n"
81 " -f, --silent, --quiet suppress error messages\n"
82 " -w, --nowarnings suppress warnings\n"
83 " -v, --verbose output extra diagnostics\n"
84 " -c, --config=filename specify a configuration file\n"
85 " -j, --just-check-config stop after reading "
86 "configuration file\n"
87 " -s, --sites-key=name configuration key that "
88 "specifies active sites\n"
89 " -n, --nodetach do not run in background\n"
90 " -d, --debug=item,... set debug options\n"
91 " --help display this help and exit\n"
92 " --version output version information "
100 printf("%s\n",version
);
105 message_level
|=M_INFO
|M_NOTICE
|M_WARNING
|M_ERR
|M_SECURITY
|
110 message_level
&=(~M_WARNING
);
114 message_level
|=M_DEBUG_CONFIG
|M_DEBUG_PHASE
|M_DEBUG
;
118 message_level
=M_FATAL
;
127 configfile
=safe_strdup(optarg
,"config_filename");
129 fatal("secnet: no config filename specified");
133 just_check_config
=True
;
138 sites_key
=safe_strdup(optarg
,"sites-key");
140 fatal("secnet: no sites key specified");
147 Message(M_ERR
,"secnet: Unknown getopt code %c\n",c
);
151 if (argc
-optind
!= 0) {
152 Message(M_ERR
,"secnet: You gave extra command line parameters, "
153 "which were ignored.\n");
157 static void setup(dict_t
*config
)
166 l
=dict_lookup(config
,"system");
168 if (!l
|| list_elem(l
,0)->type
!=t_dict
) {
169 fatal("configuration does not include a \"system\" dictionary");
171 system
=list_elem(l
,0)->data
.dict
;
172 loc
=list_elem(l
,0)->loc
;
174 /* Arrange systemwide log facility */
175 l
=dict_lookup(system
,"log");
177 fatal("configuration does not include a system/log facility");
179 system_log
=init_log(l
);
181 /* Who are we supposed to run as? */
182 userid
=dict_read_string(system
,"userid",False
,"system",loc
);
186 if (pw
&& strcmp(pw
->pw_name
,userid
)==0) {
193 fatal("userid \"%s\" not found",userid
);
198 pidfile
=dict_read_string(system
,"pidfile",False
,"system",loc
);
200 /* Check whether we need root privileges */
201 if (require_root_privileges
&& uid
!=0) {
202 fatal("the configured feature \"%s\" requires "
203 "that secnet retain root privileges while running.",
204 require_root_privileges_explanation
);
207 /* Go along site list, starting sites */
208 l
=dict_lookup(config
,sites_key
);
210 Message(M_WARNING
,"secnet: configuration key \"%s\" is missing; no "
211 "remote sites are defined\n",sites_key
);
214 while ((site
=list_elem(l
, i
++))) {
216 if (site
->type
!=t_closure
) {
217 cfgfatal(site
->loc
,"system","non-closure in site list");
219 if (site
->data
.closure
->type
!=CL_SITE
) {
220 cfgfatal(site
->loc
,"system","non-site closure in site list");
222 s
=site
->data
.closure
->interface
;
223 s
->control(s
->st
,True
);
228 void register_for_poll(void *st
, beforepoll_fn
*before
,
229 afterpoll_fn
*after
, int32_t max_nfds
, cstring_t desc
)
231 struct poll_interest
*i
;
233 i
=safe_malloc(sizeof(*i
),"register_for_poll");
237 i
->max_nfds
=max_nfds
;
240 assert(total_nfds
< INT_MAX
- max_nfds
);
241 total_nfds
+=max_nfds
;
247 static void system_phase_hook(void *sst
, uint32_t newphase
)
249 if (newphase
==PHASE_SHUTDOWN
&& pidfile
) {
250 /* Try to unlink the pidfile; don't care if it fails */
256 static int fakepoll(struct pollfd
*fds
, int nfds
, int timeout
) {
257 fd_set infds
[1], outfds
[1];
258 int maxfd
= -1, i
, rc
;
259 struct timeval tvtimeout
;
262 for(i
= 0; i
< nfds
; ++i
) {
263 if(fds
[i
].events
& POLLIN
)
264 FD_SET(fds
[i
].fd
, infds
);
265 if(fds
[i
].events
& POLLOUT
)
266 FD_SET(fds
[i
].fd
, outfds
);
267 if(fds
[i
].fd
> maxfd
)
271 tvtimeout
.tv_sec
= timeout
/ 1000;
272 tvtimeout
.tv_usec
= 1000 * (timeout
% 1000);
274 rc
= select(maxfd
+ 1, infds
, outfds
, NULL
,
275 timeout
== -1 ? NULL
: &tvtimeout
);
277 for(i
= 0; i
< nfds
; ++i
) {
279 if(FD_ISSET(fds
[i
].fd
, infds
))
281 if(FD_ISSET(fds
[i
].fd
, outfds
))
283 fds
[i
].revents
= revents
;
290 struct timeval tv_now_global
;
293 static void run(void)
295 struct poll_interest
*i
;
296 int rv
, nfds
, remain
, idx
;
300 fds
=safe_malloc(sizeof(*fds
)*total_nfds
, "run");
302 Message(M_NOTICE
,"%s [%d]: starting\n",version
,secnet_pid
);
305 if (gettimeofday(&tv_now_global
, NULL
)!=0) {
306 fatal_perror("main loop: gettimeofday");
308 now_global
=((uint64_t)tv_now_global
.tv_sec
*(uint64_t)1000)+
309 ((uint64_t)tv_now_global
.tv_usec
/(uint64_t)1000);
311 for (i
=reg
; i
; i
=i
->next
) {
313 for (check
=0; check
<i
->nfds
; check
++) {
314 if(fds
[idx
+check
].revents
& POLLNVAL
) {
315 fatal("run: poll (%s#%d) set POLLNVAL", i
->desc
, check
);
318 i
->after(i
->state
, fds
+idx
, i
->nfds
);
324 for (i
=reg
; i
; i
=i
->next
) {
326 rv
=i
->before(i
->state
, fds
+idx
, &nfds
, &timeout
);
328 /* XXX we need to handle this properly: increase the
330 fatal("run: beforepoll_fn (%s) returns %d",i
->desc
,rv
);
333 fatal("run: beforepoll_fn (%s) set timeout to %d",timeout
);
342 rv
=fakepoll(fds
, idx
, timeout
);
344 rv
=poll(fds
, idx
, timeout
);
348 fatal_perror("run: poll");
356 static void droppriv(void)
362 add_hook(PHASE_SHUTDOWN
,system_phase_hook
,NULL
);
364 /* Open the pidfile for writing now: we may be unable to do so
365 once we drop privileges. */
367 pf
=fopen(pidfile
,"w");
369 fatal_perror("cannot open pidfile \"%s\"",pidfile
);
372 if (!background
&& pf
) {
373 fprintf(pf
,"%d\n",getpid());
377 /* Now drop privileges */
379 if (setuid(uid
)!=0) {
380 fatal_perror("can't set uid to \"%s\"",userid
);
387 /* Parent process - write pidfile, exit */
388 fprintf(pf
,"%d\n",p
);
393 /* Child process - all done, just carry on */
395 /* Close stdin and stdout; we don't need them any more.
396 stderr is redirected to the system/log facility */
397 if (pipe(errfds
)!=0) {
398 fatal_perror("can't create pipe for stderr");
406 secnet_is_daemon
=True
;
408 log_from_fd(errfds
[0],"stderr",system_log
);
411 fatal_perror("cannot fork");
418 static signal_notify_fn finish
,ignore_hup
;
419 static void finish(void *st
, int signum
)
422 Message(M_NOTICE
,"%s [%d]: received %s\n",version
,secnet_pid
,(string_t
)st
);
424 static void ignore_hup(void *st
, int signum
)
426 Message(M_INFO
,"%s [%d]: received SIGHUP\n",version
,secnet_pid
);
430 int main(int argc
, char **argv
)
434 enter_phase(PHASE_GETOPTS
);
435 parse_options(argc
,argv
);
437 enter_phase(PHASE_READCONFIG
);
438 config
=read_conffile(configfile
);
440 enter_phase(PHASE_SETUP
);
443 if (just_check_config
) {
444 Message(M_INFO
,"configuration file check complete\n");
448 enter_phase(PHASE_GETRESOURCES
);
449 /* Appropriate phase hooks will have been run */
451 enter_phase(PHASE_DROPPRIV
);
454 start_signal_handling();
455 request_signal_notification(SIGTERM
,finish
,safe_strdup("SIGTERM","run"));
456 if (!background
) request_signal_notification(SIGINT
,finish
,
457 safe_strdup("SIGINT","run"));
458 request_signal_notification(SIGHUP
,ignore_hup
,NULL
);
459 enter_phase(PHASE_RUN
);
462 enter_phase(PHASE_SHUTDOWN
);
463 Message(M_NOTICE
,"%s [%d]: finished\n",version
,secnet_pid
);