Roxen.git/server/base_server/roxen.pike:f2496ad0fc3acc9461ec6fecd32186cf84eab1b0

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8422 8423 8424 8425 8426 8427 8428 8429 8430 8431 8432 8433 8434 8435 8436 8437 8438 8439 8440 8441 8442 8443 8444 8445 8446 8447 8448 8449 8450 8451 8452 8453 8454 8455 8456 8457 8458 8459 8460 8461 8462 8463 8464 8465 8466 8467 8468 8469 8470 8471 8472 8473 8474 8475 8476 8477 8478 8479 8480 8481 8482 8483 8484 8485 8486 8487 8488 8489 8490 8491 8492 8493 8494 8495 8496 8497 8498 8499 8500 8501 8502 8503 8504 8505 8506 8507 8508 8509 <// This file is part of Roxen WebServer. // Copyright © 1996 - 2009, Roxen IS. // // The Roxen WebServer main program. // // Per Hedbor, Henrik Grubbström, Pontus Hagland, David Hedbor and others. // ABS and suicide systems contributed freely by Francesco Chemolli constant cvs_version="$Id$"; //! @appears roxen //! //! The Roxen WebServer main program. // The argument cache. Used by the image cache. ArgCache argcache; // Some headerfiles #define IN_ROXEN #include <roxen.h> #include <config.h> #include <module.h> #include <stat.h> #include <timers.h> // Inherits inherit "global_variables"; #ifdef SNMP_AGENT inherit "snmpagent"; #endif #ifdef SMTP_RELAY inherit "smtprelay"; #endif inherit "hosts"; inherit "disk_cache"; inherit "fsgc"; // inherit "language"; inherit "supports"; inherit "module_support"; inherit "config_userdb"; // Used to find out which thread is the backend thread. Thread.Thread backend_thread; // --- Locale defines --- //<locale-token project="roxen_start"> LOC_S </locale-token> //<locale-token project="roxen_message"> LOC_M </locale-token> //<locale-token project="roxen_config"> LOC_C </locale-token> #define LOC_S(X,Y) _STR_LOCALE("roxen_start",X,Y) #define LOC_M(X,Y) _STR_LOCALE("roxen_message",X,Y) #define LOC_C(X,Y) _STR_LOCALE("roxen_config",X,Y) #define CALL_M(X,Y) _LOCALE_FUN("roxen_message",X,Y) // --- Debug defines --- #ifdef SSL3_DEBUG # define SSL3_WERR(X) report_debug("TLS port %s: %s\n", get_url(), X) #else # define SSL3_WERR(X) #endif #ifdef THREAD_DEBUG # define THREAD_WERR(X) report_debug("Thread: "+X+"\n") #else # define THREAD_WERR(X) #endif #ifdef LOG_GC_VERBOSE #define LOG_GC_HISTOGRAM #endif #ifdef LOG_GC_HISTOGRAM #define LOG_GC_TIMESTAMPS #endif // Needed to get core dumps of seteuid()'ed processes on Linux. #if constant(System.dumpable) #define enable_coredumps(X) System.dumpable(X) #else #define enable_coredumps(X) #endif #define DDUMP(X) sol( combine_path( __FILE__, "../../" + X ), dump ) protected function sol = master()->set_on_load; // Tell Pike.count_memory this is global. constant pike_cycle_depth = 0; #ifdef TEST_EUID_CHANGE int test_euid_change; #endif string md5( string what ) { return Gmp.mpz(Crypto.MD5.hash( what ),256)->digits(32); } string query_configuration_dir() { return configuration_dir; } array(string|int) filename_2 (program|object o) { if( objectp( o ) ) o = object_program( o ); string fname = Program.defined (o); int line; if (fname) { array(string) p = fname / ":"; if (sizeof (p) > 1 && p[-1] != "" && sscanf (p[-1], "%d%*c", int l) == 1) { fname = p[..<1] * ":"; line = l; } } else if( !fname ) { fname = master()->program_name( o ); if (!fname) return ({0, 0}); } string cwd = getcwd() + "/"; if (has_prefix (fname, cwd)) fname = fname[sizeof (cwd)..]; else if (has_prefix (fname, roxenloader.server_dir + "/")) fname = fname[sizeof (roxenloader.server_dir + "/")..]; return ({fname, line}); } string filename( program|object o ) { [string fname, int line] = filename_2 (o); return fname || "(unknown program)"; } protected int once_mode; // Note that 2.5 is a nonexisting version. It's only used for the // cache static optimization for tags such as <if> and <emit> inside // <cache> since that optimization can give tricky incompatibilities // with 2.4. // Note also that 5.3 only existed in the Print repository, and // thus is skipped here. array(string) compat_levels = ({"2.1", "2.2", "2.4", "2.5", "3.3", "3.4", "4.0", "4.5", "5.0", "5.1", "5.2", "5.4", "5.5", "6.0", }); #ifdef THREADS mapping(string:string) thread_names = ([]); string thread_name( object thread, int|void skip_auto_name ) { string tn; if( thread_names[ tn=sprintf("%O",thread) ] || skip_auto_name ) return thread_names[tn]; return tn; } void name_thread( object thread, string name ) { string th_key = sprintf("%O", thread); if (name) thread_names[th_key] = name; else m_delete(thread_names, th_key); } // This mutex is used by Privs Thread.Mutex euid_egid_lock = Thread.Mutex(); #endif /* THREADS */ /* * The privilege changer. Works like a mutex lock, but changes the UID/GID * while held. Blocks all threads. * * Based on privs.pike,v 1.36. */ int privs_level; protected class Privs { #if constant(seteuid) int saved_uid; int saved_gid; int new_uid; int new_gid; #define LOGP (variables && variables->audit && variables->audit->query()) #if constant(geteuid) && constant(getegid) && constant(seteuid) && constant(setegid) #define HAVE_EFFECTIVE_USER #endif private string _getcwd() { if (catch{return(getcwd());}) { return("Unknown directory (no x-bit on current directory?)"); } } private string dbt(array t) { if(!arrayp(t) || (sizeof(t)<2)) return ""; return (((t[0]||"Unknown program")-(_getcwd()+"/"))-"base_server/")+":"+t[1]+"\n"; } #ifdef THREADS protected mixed mutex_key; // Only one thread may modify the euid/egid at a time. protected object threads_disabled; #endif /* THREADS */ int p_level; void create(string reason, int|string|void uid, int|string|void gid) { // No need for Privs if the uid has been changed permanently. if(getuid()) return; #ifdef PRIVS_DEBUG report_debug(sprintf("Privs(%O, %O, %O)\n" "privs_level: %O\n", reason, uid, gid, privs_level)); #endif /* PRIVS_DEBUG */ #ifdef HAVE_EFFECTIVE_USER array u; #ifdef THREADS if (euid_egid_lock) { if (mixed err = catch { mutex_key = euid_egid_lock->lock(); }) master()->handle_error (err); } threads_disabled = _disable_threads(); #endif /* THREADS */ p_level = privs_level++; /* Needs to be here since root-priviliges may be needed to * use getpw{uid,nam}. */ saved_uid = geteuid(); saved_gid = getegid(); seteuid(0); /* A string of digits? */ if(stringp(uid) && (replace(uid,"0123456789"/"",({""})*10)=="")) uid = (int)uid; if(stringp(gid) && (replace(gid, "0123456789"/"", ({"" })*10) == "")) gid = (int)gid; if(!stringp(uid)) u = getpwuid(uid); else { u = getpwnam(uid); if(u) uid = u[2]; } if(u && !gid) gid = u[3]; if(!u) { if (uid && (uid != "root")) { if (intp(uid) && (uid >= 60000)) { report_warning(sprintf("Privs: User %d is not in the password database.\n" "Assuming nobody.\n", uid)); // Nobody. gid = gid || uid; // Fake a gid also. u = ({ "fake-nobody", "x", uid, gid, "A real nobody", "/", "/sbin/sh" }); } else { error("Unknown user: "+uid+"\n"); } } else { u = ({ "root", "x", 0, gid, "The super-user", "/", "/sbin/sh" }); } } if(LOGP) report_notice(LOC_M(1, "Change to %s(%d):%d privs wanted (%s), from %s"), (string)u[0], (int)uid, (int)gid, (string)reason, (string)dbt(backtrace()[-2])); if (u[2]) { #if constant(cleargroups) if (mixed err = catch { cleargroups(); }) master()->handle_error (err); #endif /* cleargroups */ #if constant(initgroups) if (mixed err = catch { initgroups(u[0], u[3]); }) master()->handle_error (err); #endif } gid = gid || getgid(); int err = (int)setegid(new_gid = gid); if (err < 0) { report_warning(LOC_M(2, "Privs: WARNING: Failed to set the " "effective group id to %d!\n" "Check that your password database is correct " "for user %s(%d),\n and that your group " "database is correct.\n"), gid, (string)u[0], (int)uid); int gid2 = gid; #ifdef HPUX_KLUDGE if (gid >= 60000) { /* HPUX has doesn't like groups higher than 60000, * but has assigned nobody to group 60001 (which isn't even * in /etc/group!). * * HPUX's libc also insists on filling numeric fields it doesn't like * with the value 60001! */ report_debug("Privs: WARNING: Assuming nobody-group.\n" "Trying some alternatives...\n"); // Assume we want the nobody group, and try a couple of alternatives foreach(({ 60001, 65534, -2 }), gid2) { report_debug("%d... ", gid2); if (initgroups(u[0], gid2) >= 0) { if ((err = setegid(new_gid = gid2)) >= 0) { report_debug("Success!\n"); break; } } } } #endif /* HPUX_KLUDGE */ if (err < 0) { report_debug("Privs: Failed\n"); error ("Failed to set EGID to %d\n", gid); } report_debug("Privs: WARNING: Set egid to %d instead of %d.\n", gid2, gid); gid = gid2; } if(getgid()!=gid) setgid(gid||getgid()); seteuid(new_uid = uid); enable_coredumps(1); #endif /* HAVE_EFFECTIVE_USER */ } void destroy() { // No need for Privs if the uid has been changed permanently. if(getuid()) return; #ifdef PRIVS_DEBUG report_debug(sprintf("Privs->destroy()\n" "privs_level: %O\n", privs_level)); #endif /* PRIVS_DEBUG */ #ifdef HAVE_EFFECTIVE_USER /* Check that we don't increase the privs level */ if (p_level >= privs_level) { report_error(sprintf("Change back to uid#%d gid#%d from uid#%d gid#%d\n" "in wrong order! Saved level:%d Current level:%d\n" "Occurs in:\n%s\n", saved_uid, saved_gid, new_uid, new_gid, p_level, privs_level, describe_backtrace(backtrace()))); return(0); } if (p_level != privs_level-1) { report_error(sprintf("Change back to uid#%d gid#%d from uid#%d gid#%d\n" "Skips privs level. Saved level:%d Current level:%d\n" "Occurs in:\n%s\n", saved_uid, saved_gid, new_uid, new_gid, p_level, privs_level, describe_backtrace(backtrace()))); } privs_level = p_level; if(LOGP) { if (mixed err = catch { array bt = backtrace(); if (sizeof(bt) >= 2) { report_notice(LOC_M(3,"Change back to uid#%d gid#%d, from %s")+"\n", saved_uid, saved_gid, dbt(bt[-2])); } else { report_notice(LOC_M(4,"Change back to uid#%d gid#%d, " "from backend")+"\n", saved_uid, saved_gid); } }) master()->handle_error (err); } #ifdef PRIVS_DEBUG int uid = geteuid(); if (uid != new_uid) { report_debug("Privs: UID #%d differs from expected #%d\n" "%s\n", uid, new_uid, describe_backtrace(backtrace())); } int gid = getegid(); if (gid != new_gid) { report_debug("Privs: GID #%d differs from expected #%d\n" "%s\n", gid, new_gid, describe_backtrace(backtrace())); } #endif /* PRIVS_DEBUG */ seteuid(0); array u = getpwuid(saved_uid); #if constant(cleargroups) if (mixed err = catch { cleargroups(); }) master()->handle_error (err); #endif /* cleargroups */ if(u && (sizeof(u) > 3)) { if (mixed err = catch { initgroups(u[0], u[3]); }) master()->handle_error (err); } setegid(saved_gid); seteuid(saved_uid); enable_coredumps(1); #endif /* HAVE_EFFECTIVE_USER */ } #else /* constant(seteuid) */ void create(string reason, int|string|void uid, int|string|void gid){} #endif /* constant(seteuid) */ } /* Used by read_config.pike, since there seems to be problems with * overloading otherwise. */ protected Privs PRIVS(string r, int|string|void u, int|string|void g) { return Privs(r, u, g); } // Current Configuration. Thread.Local current_configuration = Thread.Local(); // font cache and loading. // // This will be changed to a list of server global modules, to make it // easier to implement new types of fonts (such as PPM color fonts, as // an example) class Fonts { class Font { Image.Image write( string ... what ); array(int) text_extents( string ... what ); }; array available_font_versions(string name, int size); string describe_font_type(string n); Font get_font(string f, int size, int bold, int italic, string justification, float|int xspace, float|int yspace); Font resolve_font(string f, string|void justification); array(string) available_fonts(int(0..1)|void force_reload); } Fonts fonts; // Will replace Configuration after create() is run. program _configuration; /*set in create*/ array(Configuration) configurations = ({}); private void stop_all_configurations() { configurations->unregister_urls(); #ifdef THREADS // Spend some time waiting out the handler threads before starting // to shut down the modules. hold_handler_threads(); release_handler_threads(3); #endif configurations->stop(1); } // Function that actually shuts down Roxen. (see low_shutdown). private void really_low_shutdown(int exit_code) { // Die nicely. Catch for paranoia reasons #ifdef THREADS if (mixed err = catch (stop_handler_threads())) werror (describe_backtrace (err)); #endif /* THREADS */ if (!exit_code || once_mode) { // We're shutting down; Attempt to take mysqld with us. if (mixed err = catch { report_notice("Shutting down MySQL.\n"); } || catch { Sql.Sql db = connect_to_my_mysql(0, "mysql"); db->shutdown(); }) master()->handle_error (err); } // Zap some of the remaining caches. destruct (argcache); destruct (cache); #if 0 // Disabled since it's lying when the server is shut down with a // SIGTERM or SIGINT to the start script (which include the stop // action of the init.d script). if (mixed err = catch { if (exit_code && !once_mode) report_notice("Restarting Roxen.\n"); else report_notice("Shutting down Roxen.\n"); }) master()->handle_error (err); #endif roxenloader.real_exit( exit_code ); // Now we die... } private int shutdown_recurse; // Shutdown Roxen // exit_code = 0 True shutdown // exit_code = -1 Restart private void low_shutdown(int exit_code, int|void apply_patches) { if(shutdown_recurse >= 4) { if (mixed err = catch (report_notice("Exiting roxen (spurious signals received).\n")) || catch (stop_all_configurations())) master()->handle_error (err); // Zap some of the remaining caches. destruct(argcache); destruct(cache); stop_scan_certs(); stop_hourly_maintenance(); #ifdef THREADS #if constant(Filesystem.Monitor.basic) stop_fsgarb(); #endif if (mixed err = catch (stop_handler_threads())) master()->handle_error (err); #endif /* THREADS */ roxenloader.real_exit(exit_code); } if (shutdown_recurse++) return; #ifndef NO_SLOW_REQ_BT // Turn off the backend thread monitor while we're shutting down. slow_be_timeout_changed(); #endif if ((apply_patches || query("patch_on_restart")) > 0) { mixed err = catch { foreach(plib->file_list_imported(), mapping(string:mixed) item) { report_notice("Applying patch %s...\n", item->metadata->id); mixed err = catch { plib->install_patch(item->metadata->id, "Internal Administrator"); }; if (err) { report_error("Failed to install patch %s: %s\n", item->metadata->id, describe_backtrace(err)); } } }; if (err) { master()->handle_error(err); } } if (mixed err = catch(stop_all_configurations())) master()->handle_error (err); #ifdef SNMP_AGENT if(objectp(snmpagent)) { snmpagent->stop_trap(); snmpagent->disable(); } #endif call_out(really_low_shutdown, 0.1, exit_code); } private int shutdown_started; // Perhaps somewhat misnamed, really... This function will close all // listen ports and then quit. The 'start' script should then start a // new copy of roxen automatically. void restart(float|void i, void|int exit_code, void|int apply_patches) //! Restart roxen, if the start script is running { shutdown_started = 1; call_out(low_shutdown, i, exit_code || -1, apply_patches); } void shutdown(float|void i, void|int apply_patches) //! Shut down roxen { shutdown_started = 1; call_out(low_shutdown, i, 0, apply_patches); } void exit_when_done() { shutdown_started = 1; report_notice("Interrupt request received.\n"); low_shutdown(-1, -1); } int is_shutting_down() //! Returns true if Roxen is shutting down. { return shutdown_started; } /* * handle() stuff */ #ifdef THREADS // function handle = threaded_handle; Thread.Thread do_thread_create(string id, function f, mixed ... args) { Thread.Thread t = thread_create(f, @args); name_thread( t, id ); return t; } #if 1 constant Queue = Thread.Queue; #else // Shamelessly uses facts about pikes preemting algorithm. // Might have to be fixed in the future. class Queue //! Thread.Queue lookalike, which uses some archaic and less //! known features of the preempting algorithm in pike to optimize the //! read function. // // If those archaic and less known features are to depend on the // interpreter lock in the while loop that waits on the condition // variable then it doesn't work since Pike always might yield before // a function call (specifically, the wait() call in the condition // variable). Thus a handler thread might wait even though there is a // request to process. However, the only effect is that that specific // request isn't serviced timely; when the next request comes in the // thread will be woken up and both requests will be handled. // Furthermore it's extremely rare in the first place since there // normally are several handler threads. { inherit Thread.Condition : r_cond; array buffer=allocate(8); int r_ptr, w_ptr; int size() { return w_ptr - r_ptr; } mixed read() { while(!(w_ptr - r_ptr)) { // Make a MutexKey for wait() to please 7.3. This will of course // not fix the race, but we ignore that. See the discussion // above. (Must have an extra ref to the mutex since the // MutexKey doesn't keep one.) Thread.Mutex m = Thread.Mutex(); r_cond::wait (m->lock()); } mixed tmp = buffer[r_ptr]; buffer[r_ptr++] = 0; // Throw away any references. return tmp; } mixed try_read() { if (!(w_ptr - r_ptr)) return ([])[0]; mixed tmp = buffer[r_ptr]; buffer[r_ptr++] = 0; // Throw away any references. return tmp; } // Warning: This function isn't thread safe. void write(mixed v) { if(w_ptr >= sizeof(buffer)) { buffer=buffer[r_ptr..]+allocate(8); w_ptr-=r_ptr; r_ptr=0; } buffer[w_ptr++]=v; r_cond::signal(); } } #endif #ifndef NO_SLOW_REQ_BT // This is a system to dump all threads whenever a request takes // longer than a configurable timeout. protected Pike.Backend slow_req_monitor; // Set iff slow req bt is enabled. protected float slow_req_timeout, slow_be_timeout; protected void slow_req_monitor_thread (Pike.Backend my_monitor) { // my_monitor is just a safeguard to ensure we don't get multiple // monitor threads. name_thread(this_thread(), "Slow request monitor"); while (slow_req_monitor == my_monitor) slow_req_monitor (3600.0); name_thread(this_thread(), 0); } protected mixed slow_be_call_out; protected void slow_be_before_cb() { #ifdef DEBUG if (this_thread() != backend_thread) error ("Run from wrong thread.\n"); #endif if (Pike.Backend monitor = slow_be_call_out && slow_req_monitor) { monitor->remove_call_out (slow_be_call_out); slow_be_call_out = 0; float backend_rtime = (gethrtime() - thread_task_start_times[this_thread()]) / 1E6; thread_task_start_times[this_thread()] = 0; if (backend_rtime > slow_be_timeout) { report_slow_thread_finished (this_thread(), backend_rtime); } } } protected void slow_be_after_cb() { // FIXME: This should try to compensate for delays due to the pike // gc, because it just causes noise here. #ifdef DEBUG if (this_thread() != backend_thread) error ("Run from wrong thread.\n"); #endif if (slow_be_timeout > 0.0) { if (Pike.Backend monitor = slow_req_monitor) { thread_task_start_times[this_thread()] = gethrtime(); slow_be_call_out = monitor->call_out (dump_slow_req, slow_be_timeout, this_thread(), slow_be_timeout); } } } void slow_req_count_changed() { Pike.Backend monitor = slow_req_monitor; int count = query ("slow_req_bt_count"); if (count && monitor) { // Just a change of the count - nothing to do. } else if (count) { // Start. monitor = slow_req_monitor = Pike.SmallBackend(); Thread.thread_create (slow_req_monitor_thread, monitor); monitor->call_out (lambda () {}, 0); // Safeguard if there's a race. slow_be_timeout_changed(); } else if (monitor) { // Stop. slow_req_monitor = 0; monitor->call_out (lambda () {}, 0); // To wake up the thread. slow_be_timeout_changed(); } } void slow_req_timeout_changed() { #ifdef DEBUG if (query ("slow_req_bt_timeout") < 0) error ("Invalid timeout.\n"); #endif slow_req_timeout = query ("slow_req_bt_timeout"); } void slow_be_timeout_changed() { #ifdef DEBUG if (query ("slow_be_bt_timeout") < 0) error ("Invalid timeout.\n"); #endif slow_be_timeout = query ("slow_be_bt_timeout"); #ifdef DEBUG if ((Pike.DefaultBackend->before_callback && Pike.DefaultBackend->before_callback != slow_be_before_cb) || (Pike.DefaultBackend->after_callback && Pike.DefaultBackend->after_callback != slow_be_after_cb)) werror ("Pike.DefaultBackend already hooked up with " "other before/after callbacks - they get overwritten: %O/%O\n", Pike.DefaultBackend->before_callback, Pike.DefaultBackend->after_callback); #endif if (query ("slow_req_bt_count") && slow_be_timeout > 0.0 && // Don't trig if we're shutting down. !shutdown_started) { Pike.DefaultBackend->before_callback = slow_be_before_cb; Pike.DefaultBackend->after_callback = slow_be_after_cb; } else { Pike.DefaultBackend->before_callback = 0; Pike.DefaultBackend->after_callback = 0; if (Pike.Backend monitor = slow_be_call_out && slow_req_monitor) { monitor->remove_call_out (slow_be_call_out); slow_be_call_out = 0; } } } protected int last_dump_hrtime; protected void dump_slow_req (Thread.Thread thread, float timeout) { object threads_disabled = _disable_threads(); int count = query ("slow_req_bt_count"); if (count > 0) set ("slow_req_bt_count", count - 1); if (thread == backend_thread && !slow_be_call_out) { // Avoid false alarms for the backend thread if we got here due to // a race. Should perhaps have something like this for the handler // threads too, but otoh races are more rare there due to the // longer timeouts. } else { string th_name = ((thread != backend_thread) && thread_name(thread, 1)) || ""; if (sizeof(th_name)) th_name = " - " + th_name + " -"; report_debug ("###### %s 0x%x%s has been busy for more than %g seconds.\n", thread == backend_thread ? "Backend thread" : "Thread", thread->id_number(), th_name, timeout); int hrnow = gethrtime(); if ((hrnow - last_dump_hrtime) / 1E6 < slow_req_timeout / 2) { describe_thread (thread); } else { last_dump_hrtime = hrnow; mixed err = catch { describe_all_threads(0, 1); }; if (err) master()->handle_error(err); } } threads_disabled = 0; // Paranoia. } protected void report_slow_thread_finished (Thread.Thread thread, float time_spent) { string th_name = ((thread != backend_thread) && thread_name(thread, 1)) || ""; if (sizeof(th_name)) th_name = " - " + th_name + " -"; report_debug ("###### %s 0x%x%s finished after %.2f seconds.\n", (thread == backend_thread ? "Backend thread" : "Thread"), thread->id_number(), th_name, time_spent); } #endif // !NO_SLOW_REQ_BT // // This is easier than when there are no threads. // // See the discussion below. :-) // // // But there is extra functionality below we really want, though, // // so let's use that one instead... // function async_sig_start( function f, int really ) // { // return lambda( mixed ... args ) { // thread_create( f, @args ); // }; // } local protected Queue handle_queue = Queue(); //! Queue of things to handle. //! An entry consists of an array(function fp, array args) local protected int thread_reap_cnt; //! Number of handler threads in the process of being stopped. protected int threads_on_hold; //! Number of handler threads on hold. // Global variables for statistics int handler_num_runs = 0; int handler_num_runs_001s = 0; int handler_num_runs_005s = 0; int handler_num_runs_015s = 0; int handler_num_runs_05s = 0; int handler_num_runs_1s = 0; int handler_num_runs_5s = 0; int handler_num_runs_15s = 0; int handler_acc_time = 0; int handler_acc_cpu_time = 0; protected string debug_format_queue_task (array(function|array) task) // Debug formatter of an entry in the handler or background_run queues. { return ((functionp (task[0]) ? sprintf ("%s: %s", Function.defined (task[0]), master()->describe_function (task[0])) : programp (task[0]) ? sprintf ("%s: %s", Program.defined (task[0]), master()->describe_program (task[0])) : sprintf ("%O", task[0])) + "(" + map (task[1], lambda (mixed arg) {return RXML.utils.format_short (arg, 200);}) * ", " + ")"); } protected mapping(Thread.Thread:int) thread_task_start_times = ([]); mapping(Thread.Thread:int) get_thread_task_start_times() { // Also needed in Admin interface's thread wizard return thread_task_start_times + ([ ]); } local protected void handler_thread(int id) //! The actual handling function. This functions read function and //! parameters from the queue, calls it, then reads another one. There //! is a lot of error handling to ensure that nothing serious happens if //! the handler function throws an error. { THREAD_WERR("Handle thread ["+id+"] started"); mixed h, q; set_u_and_gid (1); #ifdef TEST_EUID_CHANGE if (test_euid_change) { Stdio.File f = Stdio.File(); if (f->open ("rootonly", "r") && f->read()) werror ("Handler thread %d can read rootonly\n", id); else werror ("Handler thread %d can't read rootonly\n", id); } #endif while(1) { int thread_flagged_as_busy; #ifndef NO_SLOW_REQ_BT Pike.Backend monitor; mixed call_out; #endif if(q=catch { do { // if (!busy_threads) werror ("GC: %d\n", gc()); cache_clear_deltas(); THREAD_WERR("Handle thread ["+id+"] waiting for next event"); if(arrayp(h=handle_queue->read()) && h[0]) { THREAD_WERR(sprintf("Handle thread [%O] calling %s", id, debug_format_queue_task (h))); set_locale(); busy_threads++; thread_flagged_as_busy = 1; handler_num_runs++; int start_hrtime = gethrtime(); thread_task_start_times[this_thread()] = start_hrtime; float handler_vtime = gauge { #ifndef NO_SLOW_REQ_BT if (h[0] != bg_process_queue && // Leave out bg_process_queue. It makes a timeout on // every individual job instead. (monitor = slow_req_monitor) && slow_req_timeout > 0.0) { call_out = monitor->call_out (dump_slow_req, slow_req_timeout, this_thread(), slow_req_timeout); h[0](@h[1]); monitor->remove_call_out (call_out); } else #endif { h[0](@h[1]); } }; int end_hrtime = gethrtime(); float handler_rtime = (end_hrtime - start_hrtime)/1E6; thread_task_start_times[this_thread()] = 0; #ifndef NO_SLOW_REQ_BT if (slow_req_timeout > 0.0 && handler_rtime > slow_req_timeout) { report_slow_thread_finished (this_thread(), handler_rtime); } #endif h=0; busy_threads--; thread_flagged_as_busy = 0; if (handler_rtime > 0.01) handler_num_runs_001s++; if (handler_rtime > 0.05) handler_num_runs_005s++; if (handler_rtime > 0.15) handler_num_runs_015s++; if (handler_rtime > 0.50) handler_num_runs_05s++; if (handler_rtime > 1.00) handler_num_runs_1s++; if (handler_rtime > 5.00) handler_num_runs_5s++; if (handler_rtime > 15.00) handler_num_runs_15s++; handler_acc_cpu_time += (int)(1E6*handler_vtime); handler_acc_time += (int)(1E6*handler_rtime); } else if(!h) { // Roxen is shutting down. report_debug("Handle thread ["+id+"] stopped.\n"); thread_reap_cnt--; #ifdef NSERIOUS if(!thread_reap_cnt) report_debug("+++ATH\n"); #endif return; } #ifdef DEBUG else if (h != 1) error ("Unknown message in handle_queue: %O\n", h); #endif else { num_hold_messages--; THREAD_WERR("Handle thread [" + id + "] put on hold"); threads_on_hold++; if (Thread.Condition cond = hold_wakeup_cond) { // Make a MutexKey for wait() to please 7.3. This will of // course not fix the race, but we ignore that. See the // comment at the declaration of hold_wakeup_cond. (Must // have an extra ref to the mutex since the MutexKey // doesn't keep one.) Thread.Mutex m = Thread.Mutex(); cond->wait (m->lock()); } threads_on_hold--; THREAD_WERR("Handle thread [" + id + "] released"); } } while(1); }) { if (thread_flagged_as_busy) busy_threads--; #ifndef NO_SLOW_REQ_BT if (call_out) monitor->remove_call_out (call_out); #endif if (h = catch { master()->handle_error (q); if (q = catch {h = 0;}) { report_error(LOC_M(5, "Uncaught error in handler thread: %sClient " "will not get any response from Roxen.")+"\n", describe_backtrace(q)); catch (q = 0); } }) { catch { report_error("Error reporting error:\n"); report_error(sprintf("Raw error: %O\n", h[0])); report_error(sprintf("Original raw error: %O\n", q[0])); }; catch (q = 0); catch (h = 0); } } } } void handle(function f, mixed ... args) { handle_queue->write(({f, args })); } int handle_queue_length() { return handle_queue->size(); } int number_of_threads; //! The number of handler threads to run. int busy_threads; //! The number of currently busy threads. protected array(object) handler_threads = ({}); //! The handler threads, the list is kept for debug reasons. void start_handler_threads() { if (query("numthreads") <= 1) { set( "numthreads", 1 ); report_warning (LOC_S(1, "Starting one thread to handle requests.")+"\n"); } else { report_notice (LOC_S(2, "Starting %d threads to handle requests.")+"\n", query("numthreads") ); } array(object) new_threads = ({}); for(; number_of_threads < query("numthreads"); number_of_threads++) new_threads += ({ do_thread_create( "Handle thread [" + number_of_threads + "]", handler_thread, number_of_threads ) }); handler_threads += new_threads; } protected int num_hold_messages; protected Thread.Condition hold_wakeup_cond = Thread.Condition(); // Note: There are races in the use of this condition variable, but // the only effect of that is that some handler thread might be // considered hung when it's actually waiting on hold_wakeup_cond, and // the hold/release handler threads function deal with hung threads // anyway. The outcome would only be that release_handler_threads // starts some extra handler thread unnecessarily. void hold_handler_threads() //! Tries to put all handler threads on hold, but gives up if it takes //! too long. { if (!hold_wakeup_cond) { THREAD_WERR("Ignoring request to hold handler threads during stop"); return; } int timeout=10; #if constant(_reset_dmalloc) // DMALLOC slows stuff down a bit... timeout *= 10; #endif /* constant(_reset_dmalloc) */ THREAD_WERR("Putting " + (number_of_threads - threads_on_hold) + " handler threads on hold, " + threads_on_hold + " on hold already"); for (int i = number_of_threads - threads_on_hold - num_hold_messages; i-- > 0;) { handle_queue->write (1); num_hold_messages++; } while (threads_on_hold < number_of_threads && timeout--) sleep (0.1); THREAD_WERR(threads_on_hold + " handler threads on hold, " + (number_of_threads - threads_on_hold) + " not responding"); } void release_handler_threads (int numthreads) //! Releases any handler threads put on hold. If necessary new threads //! are started to ensure that at least @[numthreads] threads are //! responding. Threads that haven't arrived to the hold state since //! @[hold_handler_threads] are considered nonresponding. { if (Thread.Condition cond = hold_wakeup_cond) { // Flush out any remaining hold messages from the queue. for (int i = handle_queue->size(); i && num_hold_messages; i--) { mixed task = handle_queue->try_read(); if (task == 1) num_hold_messages--; else handle_queue->write (task); } #ifdef DEBUG if (num_hold_messages) error ("num_hold_messages is bogus (%d).\n", num_hold_messages); #endif num_hold_messages = 0; int blocked_threads = number_of_threads - threads_on_hold; int threads_to_create = numthreads - threads_on_hold; THREAD_WERR("Releasing " + threads_on_hold + " threads on hold"); cond->broadcast(); if (threads_to_create > 0) { array(object) new_threads = ({}); for (int n = 0; n < threads_to_create; number_of_threads++, n++) new_threads += ({ do_thread_create( "Handle thread [" + number_of_threads + "]", handler_thread, number_of_threads ) }); handler_threads += new_threads; report_notice ("Created %d new handler threads to compensate " "for %d blocked ones.\n", threads_to_create, blocked_threads); } } else { THREAD_WERR("Ignoring request to release handler threads during stop"); return; } } //! int handler_threads_on_hold() {return !!hold_wakeup_cond;} protected Thread.MutexKey backend_block_lock; void stop_handler_threads() //! Stop all the handler threads and the backend, but give up if it //! takes too long. { int timeout=15; // Timeout if the bg queue doesn't get shorter. int background_run_timeout = 100; // Hard timeout that cuts off the bg queue. #if constant(_reset_dmalloc) // DMALLOC slows stuff down a bit... timeout *= 10; background_run_timeout *= 3; #endif /* constant(_reset_dmalloc) */ report_debug("Stopping all request handler threads.\n"); // Wake up any handler threads on hold, and ensure none gets on hold // after this. if (Thread.Condition cond = hold_wakeup_cond) { hold_wakeup_cond = 0; cond->broadcast(); } while(number_of_threads>0) { number_of_threads--; handle_queue->write(0); thread_reap_cnt++; } handler_threads = ({}); if (this_thread() != backend_thread && !backend_block_lock) { thread_reap_cnt++; Thread.Mutex mutex = Thread.Mutex(); backend_block_lock = mutex->lock(); call_out (lambda () { thread_reap_cnt--; report_debug("Backend thread stopped.\n"); mutex->lock(); error("Backend stop failed.\n"); }, 0); } int prev_bg_len = bg_queue_length(); while (thread_reap_cnt) { sleep(0.1); if (--timeout <= 0) { int cur_bg_len = bg_queue_length(); if (prev_bg_len < cur_bg_len) // Allow more time if the background queue is being worked off. timeout = 10; prev_bg_len = cur_bg_len; } if(--background_run_timeout <= 0 || timeout <= 0) { report_debug("Giving up waiting on threads; " "%d threads blocked, %d jobs in the background queue.\n", thread_reap_cnt, bg_queue_length()); #ifdef DEBUG describe_all_threads(); #endif return; } } } #else // handle function used when THREADS is not enabled. void handle(function f, mixed ... args) { f(@args); } // function handle = unthreaded_handle; #endif /* THREADS */ function async_sig_start( function f, int really ) { class SignalAsyncVerifier( function f ) { protected int async_called; void really_call( array args ) { async_called = 0; f( @args ); } void call( mixed ... args ) { if( async_called && async_called-time() ) { report_debug("Received signal %s\n", (string) signame( args[0] ) ); report_debug("\n\n" "Async calling failed for %O, calling synchronous\n", f); report_debug("Backtrace at time of hangup:\n%s\n", describe_backtrace( backtrace() )); f( @args ); return; } if( !async_called ) // Do not queue more than one call at a time. { report_debug("Received signal %s\n", (string) signame( args[0] ) ); async_called=time(); call_out( really_call, 0, args ); } } }; // call_out is not really useful here, since we probably want to run // the signal handler immediately, not whenever the backend thread // is available. /per // // Calling directly like this may however lead to recursive mutex // lock errors. The problem cannot be solved using lock(2) since the // internal structures may be in an inconsistent state from the // previous call, and waiting for the lock probably leads to a // deadlock. /noring // // But on the other hand, you are not very likely to have any mutex // locks in an unthreaded pike, since it's quite impossible. /per // // But still, the problems with inconsistent internal states are // there. The API:s for many (thread safe) objects are designed to // only allow one (1) caller at any given time. It's a bug if this // restriction can be circumvented using signals. I suggest that // Thread.Mutex takes care of this problem in non-threaded mode. // / noring // // Apparantly it already did that. :-) // // I also fixed SIGHUP to be somewhat more asynchronous. // // I also added a rather small amount of magic so that it is called // asynchronously the first time it is received, but repeated // signals are not called asynchronously unless the first signal // handler was actually called. // // Except for the SIGQUIT signal, which dumps a backtrace. It would // be an excercise in futility to call that one asynchronously. // // I hope that this will solve all your problems. /per if( really > 0 ) return lambda( mixed ... args ){ call_out( f, 0, @args ); }; if( really < 0 ) return f; return SignalAsyncVerifier( f )->call; } #ifdef THREADS protected Thread.Queue bg_queue = Thread.Queue(); protected Thread.Thread bg_process_thread; // Use a time buffer to strike a balance if the server is busy and // always have at least one busy thread: The maximum waiting time in // that case is somewhere between bg_time_buffer_min and // bg_time_buffer_max. If there are only short periods of time between // the queue runs, the max waiting time will shrink towards the // minimum. protected constant bg_time_buffer_max = 30; protected constant bg_time_buffer_min = 0; protected int bg_last_busy = 0; int bg_num_runs = 0; int bg_num_runs_001s = 0; int bg_num_runs_005s = 0; int bg_num_runs_015s = 0; int bg_num_runs_05s = 0; int bg_num_runs_1s = 0; int bg_num_runs_5s = 0; int bg_num_runs_15s = 0; int bg_acc_time = 0; int bg_acc_cpu_time = 0; int bg_queue_length() { return bg_queue->size(); } protected void bg_process_queue() { if (bg_process_thread) return; // Relying on the interpreter lock here. bg_process_thread = this_thread(); int maxbeats = min (time() - bg_last_busy, bg_time_buffer_max) * (int) (1 / 0.01); #ifndef NO_SLOW_REQ_BT Pike.Backend monitor; mixed call_out; #endif if (mixed err = catch { // Make sure we don't run forever if background jobs are queued // over and over again, to avoid starving other threads. (If they // are starved enough, busy_threads will never be incremented.) // If jobs are enqueued while running another background job, // bg_process_queue is put on the handler queue again at the very // end of this function. // // However, during shutdown we continue until the queue is really // empty. background_run won't queue new jobs then, and if this // takes too long, stop_handler_threads will exit anyway. int jobs_to_process = bg_queue->size(); while (hold_wakeup_cond ? jobs_to_process-- : bg_queue->size()) { // Not a race here since only one thread is reading the queue. array task = bg_queue->read(); // Wait a while if another thread is busy already. if (busy_threads > 1) { for (maxbeats = max (maxbeats, (int) (bg_time_buffer_min / 0.01)); busy_threads > 1 && maxbeats > 0; maxbeats--) sleep (0.01); bg_last_busy = time(); } #ifdef DEBUG_BACKGROUND_RUN report_debug ("background_run run %s [%d jobs left in queue]\n", debug_format_queue_task (task), bg_queue->size()); #endif float task_vtime, task_rtime; bg_num_runs++; #ifndef NO_SLOW_REQ_BT if ((monitor = slow_req_monitor) && slow_req_timeout > 0.0) { call_out = monitor->call_out (dump_slow_req, slow_req_timeout, this_thread(), slow_req_timeout); int start_hrtime = gethrtime(); thread_task_start_times[this_thread()] = start_hrtime; task_vtime = gauge { if (task[0]) // Ignore things that have become destructed. // Note: BackgroundProcess.repeat assumes that there are // exactly two refs to task[0] during the call below. task[0] (@task[1]); }; task_rtime = (gethrtime() - start_hrtime) / 1e6; thread_task_start_times[this_thread()] = 0; monitor->remove_call_out (call_out); } else #endif { int start_hrtime = gethrtime(); thread_task_start_times[this_thread()] = start_hrtime; task_vtime = gauge { if (task[0]) task[0] (@task[1]); }; task_rtime = (gethrtime() - start_hrtime) / 1e6; thread_task_start_times[this_thread()] = 0; } if (task_rtime > 0.01) bg_num_runs_001s++; if (task_rtime > 0.05) bg_num_runs_005s++; if (task_rtime > 0.15) bg_num_runs_015s++; if (task_rtime > 0.50) bg_num_runs_05s++; if (task_rtime > 1.00) bg_num_runs_1s++; if (task_rtime > 5.00) bg_num_runs_5s++; if (task_rtime > 15.00) bg_num_runs_15s++; bg_acc_cpu_time += (int)(1E6*task_vtime); bg_acc_time += (int)(1E6*task_rtime); if (task_rtime > 60.0) report_warning ("Warning: Background job took more than one minute " "(%g s real time and %g s cpu time):\n" " %s (%s)\n%s", task_rtime, task_vtime, functionp (task[0]) ? sprintf ("%s: %s", Function.defined (task[0]), master()->describe_function (task[0])) : programp (task[0]) ? sprintf ("%s: %s", Program.defined (task[0]), master()->describe_program (task[0])) : sprintf ("%O", task[0]), map (task[1], lambda (mixed arg) {return sprintf ("%O", arg);}) * ", ", bg_queue->size() ? (bg_queue->size() > 1 ? " " + bg_queue->size() + " more jobs in the " "background queue were delayed.\n" : " 1 more job in the background queue was delayed.\n"): ""); #ifdef DEBUG_BACKGROUND_RUN else report_debug ("background_run done, " "took %g ms cpu time and %g ms real time\n", task_vtime * 1000, task_rtime * 1000); #endif if (busy_threads > 1) bg_last_busy = time(); } }) { #ifndef NO_SLOW_REQ_BT if (call_out) monitor->remove_call_out (call_out); #endif bg_process_thread = 0; handle (bg_process_queue); throw (err); } bg_process_thread = 0; if (bg_queue->size()) { handle (bg_process_queue); // Sleep a short while to encourage a thread switch. This is a // kludge to avoid starving non-handler threads, since pike // currently (7.8.503) doesn't switch threads reliably on yields. sleep (0.001); } } #endif Thread.Thread background_run_thread() //! Returns the thread currently executing the background_run queue, //! or 0 if it isn't being processed. { #ifdef THREADS return bg_process_thread; #else // FIXME: This is not correct. Should return something nonzero when // called from the call out. But noone is running without threads // nowadays anyway. return 0; #endif } mixed background_run (int|float delay, function func, mixed... args) //! Enqueue a task to run in the background in a way that makes as //! little impact as possible on the incoming requests. No matter how //! many tasks are queued to run in the background, only one is run at //! a time. The tasks won't be starved regardless of server load, //! though. //! //! The function @[func] will be enqueued after approximately @[delay] //! seconds, to be called with the rest of the arguments as its //! arguments. //! //! In a multithreaded server the function will be executed in one of //! the handler threads. The function is executed in the backend //! thread if no thread support is available, although that //! practically never occurs anymore. //! //! To avoid starving other background jobs, the function should never //! run for a long time. Instead do another call to @[background_run] //! to queue it up again after some work has been done, or use //! @[BackgroundProcess]. //! //! @returns //! If the function is queued for execution right away then zero is //! returned. Otherwise its call out identifier is returned, which can //! be used with @[find_call_out] or @[remove_call_out]. { // FIXME: Make it possible to associate the background job with a // RoxenModule or Configuration, so that report_error etc can log in // a good place. #ifdef DEBUG_BACKGROUND_RUN report_debug ("background_run enqueue %s (%s) [%d jobs in queue]\n", functionp (func) ? sprintf ("%s: %s", Function.defined (func), master()->describe_function (func)) : programp (func) ? sprintf ("%s: %s", Program.defined (func), master()->describe_program (func)) : sprintf ("%O", func), map (args, lambda (mixed arg) {return sprintf ("%O", arg);}) * ", ", bg_queue->size()); #endif #ifdef THREADS if (!hold_wakeup_cond) { // stop_handler_threads is running; ignore more work. #ifdef DEBUG report_debug ("Ignoring background job queued during shutdown: %O\n", func); #endif return 0; } class enqueue(function func, mixed ... args) { int __hash() { return hash_value(func); } int `==(mixed gunc) { return func == gunc; } string _sprintf() { return sprintf("background_run(%O)", func); } mixed `()() { bg_queue->write (({func, args})); if (!bg_process_thread) handle (bg_process_queue); } }; if (delay) return call_out (enqueue(func, @args), delay); else { enqueue(func, @args)(); return 0; } #else // Can't do much better when we haven't got threads.. return call_out (func, delay, @args); #endif } class BackgroundProcess //! A class to do a task repeatedly in the background, in a way that //! makes as little impact as possible on the incoming requests (using //! @[background_run]). //! //! The user must keep a reference to this object, otherwise it will remove //! itself and the callback won't be called anymore. { int|float period; function func; array args; int stopping = 0; protected void repeat (function func, array args) { // Got a minimum of four refs to this: // o One in the task array in bg_process_queue. // o One on the stack in the call in bg_process_queue. // o One as current_object in the stack frame. // o One on the stack as argument to Debug.refs. int self_refs = Debug.refs (this); #ifdef DEBUG if (self_refs < 4) error ("Minimum ref calculation wrong - have only %d refs.\n", self_refs); #endif if (stopping || (self_refs <= 4) || !func) { stopping = 2; // Stopped. return; } mixed err = catch { func (@args); }; if (err) master()->handle_error (err); background_run (period, repeat, func, args); } //! @decl void set_period (int|float period); //! //! Changes the period to @[period] seconds between calls. //! //! @note //! This does not change the currently ongoing period, if any. That //! might be remedied. void set_period (int|float period_) { period = period_; } //! @decl protected void create (int|float period, function func, mixed... args); //! //! The function @[func] will be called with the following arguments //! after approximately @[period] seconds, and then kept being //! called with approximately that amount of time between each call. //! //! The repetition will stop if @[stop] is called, or if @[func] //! throws an error. protected void create (int|float period_, function func_, mixed... args_) { period = period_; func = func_; args = args_; background_run (period, repeat, func, args); } void stop() //! Sets a flag to stop the succession of calls. { stopping |= 1; } void start() //! Restart a stopped process. { int state = stopping; stopping = 0; if (state & 2) { background_run (period, repeat, func, args); } } string _sprintf() { return sprintf("BackgroundProcess(%O, %O)", period, func); } } mapping get_port_options( string key ) //! Get the options for the key 'key'. //! The interpretation of the options is protocol specific. { return (query( "port_options" )[ key ] || ([])); } void set_port_options( string key, mapping value ) //! Set the options for the key 'key'. //! The interpretation of the options is protocol specific. { mapping q = query("port_options"); q[ key ] = value; set( "port_options" , q ); save( ); } #ifdef DEBUG_URL2CONF #define URL2CONF_MSG(X...) report_debug (X) #else #define URL2CONF_MSG(X...) #endif protected mapping(string:int(0..1)) host_is_local_cache = ([]); //! Check if @[hostname] is local to this machine. int(0..1) host_is_local(string hostname) { int(0..1) res; if (!zero_type(res = host_is_local_cache[hostname])) return res; // Look up the IP. string ip = blocking_host_to_ip(hostname); // Can we bind to it? Stdio.Port port = Stdio.Port(); // bind() can trow error if ip is an invalid hostname. catch { res = port->bind(0, 0, ip); }; destruct(port); return host_is_local_cache[hostname] = res; } array(Protocol|mapping(string:mixed)) find_port_for_url ( Standards.URI url, void|Configuration only_this_conf) // Returns ({port_obj, url_data}) for a url that matches the given // one. url_data is the mapping for the url in port_obj->urls. If // only_this_conf is given then only ports for that configuration are // searched. { // Cannot use the uri formatter in Standards.URI here since we // always want the port number to be present. string host = url->host; if (has_value (host, ":")) host = "[" + (Protocols.IPv6.normalize_addr_basic (host) || host) + "]"; string url_with_port = sprintf ("%s://%s:%d%s", url->scheme, host, url->port, sizeof (url->path) ? url->path : "/"); URL2CONF_MSG("URL with port: %s\n", url_with_port); foreach (urls; string u; mapping(string:mixed) q) { URL2CONF_MSG("Trying %O:%O\n", u, q); if( glob( u+"*", url_with_port ) ) { URL2CONF_MSG("glob match\n"); if (Protocol p = q->port) if (mapping(string:mixed) url_data = p->find_url_data_for_url (url_with_port, 0, 0)) { Configuration c = url_data->conf; URL2CONF_MSG("Found config: %O\n", url_data->conf); if ((only_this_conf && (c != only_this_conf)) || (sscanf (u, "%*s://%*[^*?]%*c") == 3 && // u contains * or ?. // u is something like "http://*:80/" (!host_is_local(url->host)))) { // Bad match. URL2CONF_MSG("Bad match: only_this_conf:%O, host_is_local:%O\n", (only_this_conf && (c == only_this_conf)), (!host_is_local(url->host))); c = 0; continue; } URL2CONF_MSG("Result: %O\n", c); return ({p, url_data}); } } } return ({0, 0}); } Configuration find_configuration_for_url(Standards.URI url, void|Configuration only_this_conf, void|array(Protocol) return_port) //! Tries to to determine if a request for the given url would end up //! in this server, and if so returns the corresponding configuration. //! //! If @[only_this_conf] has been specified only matches against it //! will be returned. { [Protocol port_obj, mapping(string:mixed) url_data] = find_port_for_url (url, only_this_conf); if (return_port) return_port[0] = port_obj; return url_data && url_data->conf; } class InternalRequestID //! ID for internal requests that are not linked to any real request. { inherit RequestID; this_program set_path( string f ) { raw_url = Roxen.http_encode_invalids( f ); if( strlen( f ) > 5 ) { string a; switch( f[1] ) { case '<': if (sscanf(f, "/<%s>/%s", a, f)==2) { config = (multiset)(a/","); f = "/"+f; } // intentional fall-through case '(': if(strlen(f) && sscanf(f, "/(%s)/%s", a, f)==2) { prestate = (multiset)( a/","-({""}) ); f = "/"+f; } } } not_query = Roxen.simplify_path( scan_for_query( f ) ); return this; } this_program set_url( string url ) { object uri = Standards.URI(url); prot = upper_case(uri->scheme); misc->host = uri->host; if ((prot == "HTTP" && uri->port != 80) || (prot == "HTTPS" && uri->port != 443)) misc->host += ":" + uri->port; string path = uri->path; raw_url = path; method = "GET"; raw = "GET " + raw_url + " HTTP/1.1\r\n\r\n"; [port_obj, mapping(string:mixed) url_data] = find_port_for_url (uri, 0); if (url_data) { conf = url_data->conf; if (!conf->inited) conf->enable_all_modules(); if (string config_path = url_data->path) adjust_for_config_path (config_path); } // Update the cached URL base to keep url_base() happy. uri->path = (misc->site_prefix_path || "") + "/"; uri->query = UNDEFINED; uri->fragment = UNDEFINED; cached_url_base = sprintf("%s", uri); return set_path( raw_url ); } protected string _sprintf() { return sprintf("InternalRequestID(conf=%O; not_query=%O)", conf, not_query ); } protected void create() { client = ({ "Roxen" }); prot = "INTERNAL"; port_obj = InternalProtocol(); method = "GET"; real_variables = ([]); variables = FakedVariables( real_variables ); root_id = this_object(); cached_url_base = "internal://0.0.0.0:0/"; misc = ([ "pref_languages": PrefLanguages(), "cacheable": INITIAL_CACHEABLE, ]); connection_misc = ([]); cookies = CookieJar(); throttle = ([]); client_var = ([]); request_headers = ([]); prestate = (<>); config = (<>); supports = (<>); pragma = (<>); rest_query = ""; extra_extension = ""; remoteaddr = "127.0.0.1"; } } class Protocol //! The basic protocol. //! Implements reference handling, finding Configuration objects //! for URLs, and the bind/accept handling. { protected Stdio.Port port_obj; inherit "basic_defvar"; int bound; //! 0 if the port isn't bound, 1 if it is, and -1 if it binding it //! failed with EADDRINUSE when told to ignore that error. //! //! @note //! The -1 state should be uncommon since @[register_url] should //! remove such objects after the failed bind attempt. string path; constant name = "unknown"; constant supports_ipless = 0; //! If true, the protocol handles ip-less virtual hosting constant requesthandlerfile = ""; //! Filename of a by-connection handling class. It is also possible //! to set the 'requesthandler' class member in a overloaded create //! function. constant default_port = 4711; //! If no port is specified in the URL, use this one string url_prefix = name + "://"; int port; //! The currently bound portnumber string ip; //! The canonical IP-number (0 for ANY) this port is bound to. //! //! IPv6 numbers are in colon separated four-digit lower-case hexadecimal //! notation with the first longest sequence of zeros compressed. int refs; //! The number of references to this port. This is the same as the //! size of @[urls] and @[sorted_urls]. program requesthandler; //! The per-connection request handling class array(string) sorted_urls = ({}); //! Sorted by length, longest first mapping(string:mapping(string:mixed)) urls = ([]); //! .. url -> ([ "conf":.., ... ]) //! //! Indexed by URL. The following data is stored: //! @mapping //! @member Configuration "conf" //! The Configuration object for this URL. //! @member string "hostname" //! The hostname from the URL. //! @member string|void "path" //! The path (if any) from the URL. //! @member Protocol "port" //! The protocol handler for this URL. //! @member int "mib_version" //! (Only SNMP). The version number for the configuration MIB //! tree when it was last merged. //! @endmapping mapping(Configuration:mapping(string:mixed)) conf_data = ([]); //! Maps the configuration objects to the data mappings in @[urls]. void ref(string name, mapping(string:mixed) data) //! Add a ref for the URL @[name] with the data @[data]. //! //! See @[urls] for documentation about the supported //! fields in @[data]. { if(urls[name]) { conf_data[urls[name]->conf] = urls[name] = data; return; // only ref once per URL } if (!refs) path = data->path; else if (path != (data->path || "")) path = 0; refs++; mu = 0; conf_data[data->conf] = urls[name] = data; sorted_urls = Array.sort_array(indices(urls), lambda(string a, string b) { return sizeof(a)<sizeof(b); }); } void unref(string _name) //! Remove a ref for the URL '_name' { // if(!urls[name]) // only unref once // return; m_delete(conf_data, urls[_name]->conf); m_delete(urls, _name); if (!path) { array(string) paths = Array.uniq (values (urls)->path); if (sizeof (paths) == 1) path = paths[0]; } sorted_urls -= ({_name}); #ifdef PORT_DEBUG report_debug("Protocol(%s)->unref(%O): refs:%d\n", get_url(), _name, refs); #endif /* PORT_DEBUG */ if( !--refs ) { if (retries) { remove_call_out(bind); } if (port_obj) { destruct(port_obj); } port_obj = 0; if (open_ports[name]) { if (open_ports[name][ip]) { m_delete(open_ports[name][ip], port); if(!sizeof(open_ports[name][ip])) { // Make sure the entries for IPv4 and IPv6 ANY are left alone. if (ip && ip != "::") m_delete(open_ports[name], ip); } } if (sizeof(open_ports[name]) <= 2) { // Only ANY left. int empty = 1; foreach(open_ports[name]; string ip; mapping m) { if (sizeof(m)) { empty = 0; break; } } if (empty) m_delete(open_ports, name); } } any_port = 0; // Avoid possibly cyclic ref. //destruct( ); // Close the port. } } Stdio.File accept() { return port_obj->accept(); } string query_address() { return port_obj && port_obj->query_address(); } mapping(string:mixed) mu; string rrhf; protected void got_connection() { Stdio.File q; while( q = accept() ) { if( !requesthandler && rrhf ) { requesthandler = (program)(rrhf); } Configuration c; if( refs < 2 ) { if(!mu) { mu = get_iterator(urls)->value(); if(!(c=mu->conf)->inited ) { handle (lambda () { c->enable_all_modules(); call_out (lambda () { // The connection might have been // closed already, e.g. by // http_fallback.ssl_alert_callback() // (prot_https.pike). Avoid a // backtrace in that case. if (q->is_open()) requesthandler (q, this, c); }, 0); }); return; } } else c = mu->conf; } requesthandler( q, this_object(), c ); } } private Protocol any_port; mapping(string:mixed) find_url_data_for_url (string url, int no_default, RequestID id) { if( refs == 1 ) { if (!no_default) { if(!mu) mu=get_iterator(urls)->value(); URL2CONF_MSG ("%O %O Only one configuration: %O\n", this, url, mu->conf); return mu; } } else if (!refs) { URL2CONF_MSG("%O %O No active URLS!\n", this, url); return 0; } URL2CONF_MSG("sorted_urls: %O\n" "url: %O\n", sorted_urls, url); // The URLs are sorted from longest to shortest, so that short // urls (such as http://*/) will not match before more complete // ones (such as http://*.roxen.com/) foreach( sorted_urls, string in ) { if( glob( in+"*", url ) ) { URL2CONF_MSG ("%O %O sorted_urls: %O\n", this, url, urls[in]->conf); return urls[in]; } } if( no_default ) { URL2CONF_MSG ("%O %O no default\n", this, url); return 0; } // Note: The docs for RequestID.misc->default_conf has a // description of this fallback procedure. // No host matched, or no host header was included in the request. // Is the URL in the '*' ports? if (!any_port) any_port = open_ports[ name ][ 0 ][ port ]; if (any_port && any_port != this) if (mapping(string:mixed) u = any_port->find_url_data_for_url (url, 1, id)) { URL2CONF_MSG ("%O %O found on ANY port: %O\n", this, url, u->conf); if (id) { id->misc->defaulted_conf = 1; id->port_obj = any_port; } return u; } // No. We have to default to one of the other ports. // It might be that one of the servers is tagged as a default server. mapping(Configuration:int(1..1)) choices = ([]); foreach( configurations, Configuration c ) if( c->query( "default_server" ) ) choices[c] = 1; if( sizeof( choices ) ) { // Pick a default server bound to this port foreach (urls;; mapping cc) if( choices[ cc->conf ] ) { URL2CONF_MSG ("%O %O conf in choices: %O\n", this, url, cc->conf); if (id) id->misc->defaulted_conf = 2; return cc; } } return 0; } Configuration find_configuration_for_url( string url, RequestID id ) //! Given a url and requestid, try to locate a suitable configuration //! (virtual site) for the request. //! This interface is not at all set in stone, and might change at //! any time. { mapping(string:mixed) url_data = find_url_data_for_url (url, 0, id); if (!url_data) { // Pick the first default server available. FIXME: This makes // it impossible to handle the server path correctly. foreach (configurations, Configuration c) if (c->query ("default_server")) { URL2CONF_MSG ("%O %O any default server: %O\n", this, url, c); if (id) id->misc->defaulted_conf = 3; return c; } // if we end up here, there is no default port at all available // so grab the first configuration that is available at all. // We choose the last entry in sorted_urls since that's the most // generic one and therefore probably the best option for a // fallback. url_data = urls[sorted_urls[-1]]; if (id) { id->misc->defaulted_conf = 4; id->misc->defaulted=1; // Compat. } URL2CONF_MSG ("%O %O last in sorted_urls: %O\n", this, url, url_data->conf); } // It's assumed nothing below uses data in this object, since // find_url_data_for_url might have switched Protocol object. string config_path = url_data->path; if (config_path && id && id->adjust_for_config_path) id->adjust_for_config_path (config_path); Configuration c = url_data->conf; return c; } mixed query_option( string x ) //! Query the port-option 'x' for this port. { return query( x ); } string get_key() //! Return the key used for this port (protocol:ip:portno) { #if 0 if (ip == "::") return name + ":0:" + port; else #endif return name+":"+ip+":"+port; } string get_url() //! Return the port on URL form. { return (string) name + "://" + (!ip ? "*" : has_value (ip, ":") ? "[" + ip + "]" : ip) + ":" + port + "/"; } void save() //! Save all port options { set_port_options( get_key(), mkmapping( indices(variables), map(indices(variables),query))); } void restore() //! Restore all port options from saved values { setvars(get_port_options( get_key() )); } protected int retries; protected void bind (void|int ignore_eaddrinuse) { if (bound) return; if (!port_obj) port_obj = Stdio.Port(); Privs privs = Privs (sprintf ("Binding %s", get_url())); if (port_obj->bind(port, got_connection, ip)) { privs = 0; bound = 1; return; } privs = 0; #if constant(System.EAFNOSUPPORT) if (port_obj->errno() == System.EAFNOSUPPORT) { // Fail permanently. error("Invalid address " + ip); } #endif /* System.EAFNOSUPPORT */ #if constant(System.EADDRINUSE) if (port_obj->errno() == System.EADDRINUSE) { if (ignore_eaddrinuse) { // Told to ignore the bind problem. bound = -1; return; } if (retries++ < 10) { // We may get spurious failures on rebinding ports on some OS'es // (eg Linux, WIN32). See [bug 3031]. report_error(LOC_M(6, "Failed to bind %s (%s)")+"\n", get_url(), strerror(port_obj->errno())); report_notice(LOC_M(62, "Attempt %d. Retrying in 1 minute.")+"\n", retries); call_out(bind, 60); } } else #endif /* constant(System.EADDRINUSE) */ { report_error(LOC_M(6, "Failed to bind %s (%s)")+"\n", get_url(), strerror(port_obj->errno())); #if 0 werror (describe_backtrace (backtrace())); #endif } } string canonical_ip(string i) { if (!i) return 0; if (has_value(i, ":")) return Protocols.IPv6.normalize_addr_short (i); else { // IPv4 array(int) segments = array_sscanf(i, "%d.%d.%d.%d"); string bytes; switch(sizeof(segments)) { default: case 4: bytes = sprintf("%1c%1c%1c%1c", @segments); break; case 0: return 0; // ANY. case 1: /* When only one part is given, the value is stored directly in * the network address without any byte rearrangement. */ bytes = sprintf("%4c", @segments); break; case 2: /* When a two part address is supplied, the last part is inter- * preted as a 24-bit quantity and placed in the right most * three bytes of the network address. This makes the two part * address format convenient for specifying Class A network * addresses as net.host. */ bytes = sprintf("%1c%3c", @segments); break; case 3: /* When a three part address is specified, the last part is * interpreted as a 16-bit quantity and placed in the right * most two bytes of the network address. This makes the three * part address format convenient for specifying Class B net- * work addresses as 128.net.host. */ bytes = sprintf("%1c%1c%2c", @segments); break; } if (bytes == "\0\0\0\0") return 0; // ANY. return sprintf("%d.%d.%d.%d", @((array(int))bytes)); } } protected void setup (int pn, string i) { port = pn; ip = canonical_ip(i); restore(); if (sizeof(requesthandlerfile)) { if( file_stat( "../local/"+requesthandlerfile ) ) rrhf = "../local/"+requesthandlerfile; else rrhf = requesthandlerfile; DDUMP( rrhf ); #ifdef DEBUG if( !requesthandler ) requesthandler = (program)(rrhf); #endif } bound = 0; port_obj = 0; retries = 0; } protected void create( int pn, string i, void|int ignore_eaddrinuse ) //! Constructor. Bind to the port 'pn' ip 'i' { setup (pn, i); bind (ignore_eaddrinuse); } protected string _sprintf( ) { return "Protocol(" + get_url() + ")"; } } class InternalProtocol //! Protocol for internal requests that are not linked to any real request. { inherit Protocol; constant name = "internal"; constant prot_name = "internal"; constant supports_ipless = 1; constant default_port = 0; protected void create() { path = ""; port = default_port; ip = "0.0.0.0"; } } #if constant(SSL.File) // Some convenience functions. #if constant(SSL.Constants.fmt_cipher_suites) constant fmt_cipher_suite = SSL.Constants.fmt_cipher_suite; constant fmt_cipher_suites = SSL.Constants.fmt_cipher_suites; #else protected mapping(int:string) suite_to_symbol = ([]); string fmt_cipher_suite(int suite) { if (!sizeof(suite_to_symbol)) { foreach(indices(SSL.Constants), string id) { if (has_prefix(id, "SSL_") || has_prefix(id, "TLS_") || has_prefix(id, "SSL2_")) { suite_to_symbol[SSL.Constants[id]] = id; } } } string res = suite_to_symbol[suite]; if (res) return res; return suite_to_symbol[suite] = sprintf("unknown(%d)", suite); } string fmt_cipher_suites(array(int) s) { String.Buffer b = String.Buffer(); foreach(s, int c) { b->add(sprintf(" %-6d: %s\n", c, fmt_cipher_suite(c))); } return (string)b; } #endif class SSLContext { #if constant(SSL.Context) inherit SSL.Context; #if defined(DEBUG) || defined(SSL3_DEBUG) SSL.Alert alert_factory(SSL.Connection con, int level, int description, SSL.Constants.ProtocolVersion version, string|void debug_message) { if (description != SSL.Constants.ALERT_close_notify) { if (debug_message) { werror("SSL %s: %s: %s", (level == SSL.Constants.ALERT_warning)? "WARNING":"ERROR", SSL.Constants.fmt_constant(description, "ALERT"), debug_message); } else { werror("SSL %s: %s\n", (level == SSL.Constants.ALERT_warning)? "WARNING":"ERROR", SSL.Constants.fmt_constant(description, "ALERT")); } } return ::alert_factory(con, level, description, version, debug_message); } #endif /* DEBUG || SSL3_DEBUG */ #else inherit SSL.context; #endif } //! Base protocol for protocols that support upgrading to TLS. //! //! Exactly like Port, but contains settings for TLS. class StartTLSProtocol { inherit Protocol; // SSL context SSLContext ctx = SSLContext(); int cert_failure; protected void cert_err_unbind() { if (bound > 0) { port_obj->close(); report_warning ("TLS port %s closed.\n", get_url()); bound = 0; } } #define CERT_WARNING(VAR, MSG, ARGS...) do { \ string msg = (MSG); \ array args = ({ARGS}); \ if (sizeof (args)) msg = sprintf (msg, @args); \ report_warning ("TLS port %s: %s", get_url(), msg); \ (VAR)->add_warning (msg); \ } while (0) #define CERT_ERROR(VAR, MSG, ARGS...) do { \ string msg = (MSG); \ array args = ({ARGS}); \ if (sizeof (args)) msg = sprintf (msg, @args); \ report_error ("TLS port %s: %s", get_url(), msg); \ (VAR)->add_warning (msg); \ cert_err_unbind(); \ cert_failure = 1; \ return; \ } while (0) #if constant(SSL.Constants.PROTOCOL_TLS_MAX) protected void set_version(SSLContext|void ctx) { if (!ctx) ctx = this_program::ctx; ctx->min_version = query("ssl_min_version"); } #endif protected void filter_preferred_suites(SSLContext|void ctx) { if (!ctx) ctx = this_program::ctx; #if constant(SSL.ServerConnection) int mode = query("ssl_suite_filter"); int bits = query("ssl_key_bits"); /* Suite filter encoding: * * Bit Mask Meaning * 0 1 Strict suite B * 1 2 Transitional suite B * 2 4 Ephemeral only * 3 8 Suite B * 4 16 New (explicit RSA) config. * * Config value Meaning * 0 Default * 4 OLD Ephemeral key-exchanges only. * 8 OLD Suite B (relaxed) * 12 OLD Suite B (ephemeral only) * 14 OLD Suite B (transitional) * 15 OLD Suite B (strict) * * 16 Allow RSA-encryption * 20 Ephemeral key-exchanges only. (default) * 24 Suite B (allow RSA-encryption) * 28 Suite B (ephemeral only) * 30 Suite B (transitional) * 31 Suite B (strict) */ array(int) suites = ({}); if (!mode) mode = 20; // Set the default. if ((mode & 8) && !ctx->configure_suite_b) { // FIXME: Warn: Suite B suites not available. mode &= ~8; } if ((mode & 8) && ctx->configure_suite_b) { // Suite B. switch(mode) { case 15: // Strict mode. ctx->configure_suite_b(bits, 2); break; case 14: // Transitional mode. ctx->configure_suite_b(bits, 1); break; default: ctx->configure_suite_b(bits); break; } suites = ctx->preferred_suites; if (ctx->min_version < query("ssl_min_version")) { set_version(ctx); } } else { suites = ctx->get_suites(bits, 1); // Make sure the min version is restored in case we've // switched from Suite B. set_version(ctx); } if (mode & 4) { // Ephemeral suites only. suites = filter(suites, lambda(int suite) { return (<

Roxen.git/ server/ base_server/ roxen.pike > f2496ad0fc3acc9461ec6fecd32186cf84eab1b0 [Annotate]