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;
31 extern uint32_t message_level;
32 extern bool_t secnet_is_daemon;
33 extern struct log_if *system_log;
36 extern void start_signal_handling(void);
38 /* Structures dealing with poll() call */
39 struct poll_interest {
40 beforepoll_fn *before;
46 struct poll_interest *next;
48 static struct poll_interest *reg=NULL;
49 static uint32_t total_nfds=10;
51 static bool_t finished=False;
53 /* Parse the command line options */
54 static void parse_options(int argc, char **argv)
60 static struct option long_options[] = {
61 {"verbose", 0, 0, 'v'},
62 {"nowarnings", 0, 0, 'w'},
65 {"nodetach", 0, 0, 'n'},
66 {"silent", 0, 0, 'f'},
69 {"config", 1, 0, 'c'},
70 {"just-check-config", 0, 0, 'j'},
71 {"sites-key", 1, 0, 's'},
75 c=getopt_long(argc, argv, "vwdnjc:ft:s:",
76 long_options, &option_index);
83 printf("Usage: secnet [OPTION]...\n\n"
84 " -f, --silent, --quiet suppress error messages\n"
85 " -w, --nowarnings suppress warnings\n"
86 " -v, --verbose output extra diagnostics\n"
87 " -c, --config=filename specify a configuration file\n"
88 " -j, --just-check-config stop after reading "
89 "configuration file\n"
90 " -s, --sites-key=name configuration key that "
91 "specifies active sites\n"
92 " -n, --nodetach do not run in background\n"
93 " -d, --debug=item,... set debug options\n"
94 " --help display this help and exit\n"
95 " --version output version information "
103 printf("%s\n",version);
108 message_level|=M_INFO|M_NOTICE|M_WARNING|M_ERR|M_SECURITY|
113 message_level&=(~M_WARNING);
117 message_level|=M_DEBUG_CONFIG|M_DEBUG_PHASE|M_DEBUG;
121 message_level=M_FATAL;
130 configfile=safe_strdup(optarg,"config_filename");
132 fatal("secnet: no config filename specified");
136 just_check_config=True;
141 sites_key=safe_strdup(optarg,"sites-key");
143 fatal("secnet: no sites key specified");
150 Message(M_ERR,"secnet: Unknown getopt code %c\n",c);
154 if (argc-optind != 0) {
155 Message(M_ERR,"secnet: You gave extra command line parameters, "
156 "which were ignored.\n");
160 static void setup(dict_t *config)
169 l=dict_lookup(config,"system");
171 if (!l || list_elem(l,0)->type!=t_dict) {
172 fatal("configuration does not include a \"system\" dictionary");
174 system=list_elem(l,0)->data.dict;
175 loc=list_elem(l,0)->loc;
177 /* Arrange systemwide log facility */
178 l=dict_lookup(system,"log");
180 fatal("configuration does not include a system/log facility");
182 system_log=init_log(l);
184 /* Who are we supposed to run as? */
185 userid=dict_read_string(system,"userid",False,"system",loc);
189 if (pw && strcmp(pw->pw_name,userid)==0) {
196 fatal("userid \"%s\" not found",userid);
201 pidfile=dict_read_string(system,"pidfile",False,"system",loc);
203 /* Check whether we need root privileges */
204 if (require_root_privileges && uid!=0) {
205 fatal("the configured feature \"%s\" requires "
206 "that secnet retain root privileges while running.",
207 require_root_privileges_explanation);
210 /* Go along site list, starting sites */
211 l=dict_lookup(config,sites_key);
213 Message(M_WARNING,"secnet: configuration key \"%s\" is missing; no "
214 "remote sites are defined\n",sites_key);
217 while ((site=list_elem(l, i++))) {
219 if (site->type!=t_closure) {
220 cfgfatal(site->loc,"system","non-closure in site list");
222 if (site->data.closure->type!=CL_SITE) {
223 cfgfatal(site->loc,"system","non-site closure in site list");
225 s=site->data.closure->interface;
226 s->control(s->st,True);
231 void register_for_poll(void *st, beforepoll_fn *before,
232 afterpoll_fn *after, uint32_t max_nfds, cstring_t desc)
234 struct poll_interest *i;
236 i=safe_malloc(sizeof(*i),"register_for_poll");
240 i->max_nfds=max_nfds;
243 total_nfds+=max_nfds;
249 static void system_phase_hook(void *sst, uint32_t newphase)
251 if (newphase==PHASE_SHUTDOWN && pidfile) {
252 /* Try to unlink the pidfile; don't care if it fails */
257 static void run(void)
259 struct timeval tv_now;
261 struct poll_interest *i;
262 int rv, nfds, remain, idx;
266 fds=safe_malloc(sizeof(*fds)*total_nfds, "run");
268 Message(M_NOTICE,"%s [%d]: starting\n",version,secnet_pid);
271 if (gettimeofday(&tv_now, NULL)!=0) {
272 fatal_perror("main loop: gettimeofday");
274 now=((uint64_t)tv_now.tv_sec*(uint64_t)1000)+
275 ((uint64_t)tv_now.tv_usec/(uint64_t)1000);
277 for (i=reg; i; i=i->next) {
278 i->after(i->state, fds+idx, i->nfds, &tv_now, &now);
284 for (i=reg; i; i=i->next) {
286 rv=i->before(i->state, fds+idx, &nfds, &timeout, &tv_now, &now);
288 /* XXX we need to handle this properly: increase the
290 fatal("run: beforepoll_fn (%s) returns %d",i->desc,rv);
293 fatal("run: beforepoll_fn (%s) set timeout to %d",timeout);
301 rv=poll(fds, idx, timeout);
304 fatal_perror("run: poll");
312 static void droppriv(void)
318 add_hook(PHASE_SHUTDOWN,system_phase_hook,NULL);
320 /* Open the pidfile for writing now: we may be unable to do so
321 once we drop privileges. */
323 pf=fopen(pidfile,"w");
325 fatal_perror("cannot open pidfile \"%s\"",pidfile);
328 if (!background && pf) {
329 fprintf(pf,"%d\n",getpid());
333 /* Now drop privileges */
335 if (setuid(uid)!=0) {
336 fatal_perror("can't set uid to \"%s\"",userid);
343 /* Parent process - write pidfile, exit */
344 fprintf(pf,"%d\n",p);
349 /* Child process - all done, just carry on */
351 /* Close stdin and stdout; we don't need them any more.
352 stderr is redirected to the system/log facility */
353 if (pipe(errfds)!=0) {
354 fatal_perror("can't create pipe for stderr");
362 secnet_is_daemon=True;
364 log_from_fd(errfds[0],"stderr",system_log);
367 fatal_perror("cannot fork");
374 static signal_notify_fn finish,ignore_hup;
375 static void finish(void *st, int signum)
378 Message(M_NOTICE,"%s [%d]: received %s\n",version,secnet_pid,(string_t)st);
380 static void ignore_hup(void *st, int signum)
382 Message(M_INFO,"%s [%d]: received SIGHUP\n",version,secnet_pid);
386 int main(int argc, char **argv)
390 enter_phase(PHASE_GETOPTS);
391 parse_options(argc,argv);
393 enter_phase(PHASE_READCONFIG);
394 config=read_conffile(configfile);
396 enter_phase(PHASE_SETUP);
399 if (just_check_config) {
400 Message(M_INFO,"configuration file check complete\n");
404 enter_phase(PHASE_GETRESOURCES);
405 /* Appropriate phase hooks will have been run */
407 enter_phase(PHASE_DROPPRIV);
410 start_signal_handling();
411 request_signal_notification(SIGTERM,finish,safe_strdup("SIGTERM","run"));
412 if (!background) request_signal_notification(SIGINT,finish,
413 safe_strdup("SIGINT","run"));
414 request_signal_notification(SIGHUP,ignore_hup,NULL);
415 enter_phase(PHASE_RUN);
418 enter_phase(PHASE_SHUTDOWN);
419 Message(M_NOTICE,"%s [%d]: finished\n",version,secnet_pid);