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Import Upstream version 1.1~pre2

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This commit is contained in:
Guus Sliepen 2019-08-26 13:44:49 +02:00
parent a04a7bcd67
commit 02de1cd2f1
172 changed files with 32291 additions and 25994 deletions
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559
src/process.c
View file

@ -1,7 +1,7 @@
/*
process.c -- process management functions
Copyright (C) 1999-2005 Ivo Timmermans,
2000-2015 Guus Sliepen <guus@tinc-vpn.org>
2000-2011 Guus Sliepen <guus@tinc-vpn.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -22,12 +22,12 @@
#include "conf.h"
#include "connection.h"
#include "control.h"
#include "device.h"
#include "edge.h"
#include "logger.h"
#include "net.h"
#include "node.h"
#include "pidfile.h"
#include "process.h"
#include "subnet.h"
#include "utils.h"
@ -35,18 +35,12 @@
/* If zero, don't detach from the terminal. */
bool do_detach = true;
bool sighup = false;
bool sigalrm = false;
extern char *identname;
extern char *pidfilename;
extern char **g_argv;
extern bool use_logfile;
#ifndef HAVE_MINGW
static sigset_t emptysigset;
#endif
/* Some functions the less gifted operating systems might lack... */
#ifdef HAVE_MINGW
@ -59,54 +53,49 @@ static SC_HANDLE service = NULL;
static SERVICE_STATUS status = {0};
static SERVICE_STATUS_HANDLE statushandle = 0;
bool install_service(void) {
static bool install_service(void) {
char command[4096] = "\"";
char **argp;
bool space;
SERVICE_DESCRIPTION description = {"Virtual Private Network daemon"};
manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if(!manager) {
logger(LOG_ERR, "Could not open service manager: %s", winerror(GetLastError()));
return false;
}
if(!strchr(program_name, '\\')) {
GetCurrentDirectory(sizeof(command) - 1, command + 1);
strncat(command, "\\", sizeof(command) - strlen(command));
GetCurrentDirectory(sizeof command - 1, command + 1);
strncat(command, "\\", sizeof command - strlen(command));
}
strncat(command, program_name, sizeof(command) - strlen(command));
strncat(command, program_name, sizeof command - strlen(command));
strncat(command, "\"", sizeof(command) - strlen(command));
strncat(command, "\"", sizeof command - strlen(command));
for(argp = g_argv + 1; *argp; argp++) {
space = strchr(*argp, ' ');
strncat(command, " ", sizeof(command) - strlen(command));
strncat(command, " ", sizeof command - strlen(command));
if(space)
strncat(command, "\"", sizeof command - strlen(command));
strncat(command, *argp, sizeof command - strlen(command));
if(space) {
strncat(command, "\"", sizeof(command) - strlen(command));
}
strncat(command, *argp, sizeof(command) - strlen(command));
if(space) {
strncat(command, "\"", sizeof(command) - strlen(command));
}
if(space)
strncat(command, "\"", sizeof command - strlen(command));
}
service = CreateService(manager, identname, identname,
SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL,
command, NULL, NULL, NULL, NULL, NULL);
SERVICE_ALL_ACCESS, SERVICE_WIN32_OWN_PROCESS, SERVICE_AUTO_START, SERVICE_ERROR_NORMAL,
command, NULL, NULL, NULL, NULL, NULL);
if(!service) {
DWORD lasterror = GetLastError();
logger(LOG_ERR, "Could not create %s service: %s", identname, winerror(lasterror));
if(lasterror != ERROR_SERVICE_EXISTS) {
if(lasterror != ERROR_SERVICE_EXISTS)
return false;
}
}
if(service) {
@ -116,106 +105,67 @@ bool install_service(void) {
service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
}
if(!StartService(service, 0, NULL)) {
if(!StartService(service, 0, NULL))
logger(LOG_WARNING, "Could not start %s service: %s", identname, winerror(GetLastError()));
} else {
else
logger(LOG_INFO, "%s service started", identname);
}
return true;
}
bool remove_service(void) {
manager = OpenSCManager(NULL, NULL, SC_MANAGER_ALL_ACCESS);
if(!manager) {
logger(LOG_ERR, "Could not open service manager: %s", winerror(GetLastError()));
return false;
}
service = OpenService(manager, identname, SERVICE_ALL_ACCESS);
if(!service) {
logger(LOG_ERR, "Could not open %s service: %s", identname, winerror(GetLastError()));
return false;
}
if(!ControlService(service, SERVICE_CONTROL_STOP, &status)) {
logger(LOG_ERR, "Could not stop %s service: %s", identname, winerror(GetLastError()));
} else {
logger(LOG_INFO, "%s service stopped", identname);
}
if(!DeleteService(service)) {
logger(LOG_ERR, "Could not remove %s service: %s", identname, winerror(GetLastError()));
return false;
}
logger(LOG_INFO, "%s service removed", identname);
return true;
}
DWORD WINAPI controlhandler(DWORD request, DWORD type, LPVOID boe, LPVOID bah) {
switch(request) {
case SERVICE_CONTROL_INTERROGATE:
SetServiceStatus(statushandle, &status);
return NO_ERROR;
case SERVICE_CONTROL_STOP:
logger(LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_STOP");
break;
case SERVICE_CONTROL_SHUTDOWN:
logger(LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_SHUTDOWN");
break;
default:
logger(LOG_WARNING, "Got unexpected request %d", (int)request);
return ERROR_CALL_NOT_IMPLEMENTED;
}
if(running) {
running = false;
status.dwWaitHint = 30000;
status.dwCurrentState = SERVICE_STOP_PENDING;
SetServiceStatus(statushandle, &status);
return NO_ERROR;
} else {
status.dwWaitHint = 0;
status.dwCurrentState = SERVICE_STOPPED;
SetServiceStatus(statushandle, &status);
exit(1);
case SERVICE_CONTROL_INTERROGATE:
SetServiceStatus(statushandle, &status);
return NO_ERROR;
case SERVICE_CONTROL_STOP:
logger(LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_STOP");
break;
case SERVICE_CONTROL_SHUTDOWN:
logger(LOG_NOTICE, "Got %s request", "SERVICE_CONTROL_SHUTDOWN");
break;
default:
logger(LOG_WARNING, "Got unexpected request %d", request);
return ERROR_CALL_NOT_IMPLEMENTED;
}
event_loopexit(NULL);
status.dwWaitHint = 30000;
status.dwCurrentState = SERVICE_STOP_PENDING;
SetServiceStatus(statushandle, &status);
return NO_ERROR;
}
VOID WINAPI run_service(DWORD argc, LPTSTR *argv) {
VOID WINAPI run_service(DWORD argc, LPTSTR* argv) {
int err = 1;
extern int main2(int argc, char **argv);
status.dwServiceType = SERVICE_WIN32;
status.dwServiceType = SERVICE_WIN32;
status.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_SHUTDOWN;
status.dwWin32ExitCode = 0;
status.dwServiceSpecificExitCode = 0;
status.dwCheckPoint = 0;
status.dwWin32ExitCode = 0;
status.dwServiceSpecificExitCode = 0;
status.dwCheckPoint = 0;
statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL);
statushandle = RegisterServiceCtrlHandlerEx(identname, controlhandler, NULL);
if(!statushandle) {
if (!statushandle) {
logger(LOG_ERR, "System call `%s' failed: %s", "RegisterServiceCtrlHandlerEx", winerror(GetLastError()));
err = 1;
} else {
status.dwWaitHint = 30000;
status.dwCurrentState = SERVICE_START_PENDING;
status.dwWaitHint = 30000;
status.dwCurrentState = SERVICE_START_PENDING;
SetServiceStatus(statushandle, &status);
status.dwWaitHint = 0;
status.dwWaitHint = 0;
status.dwCurrentState = SERVICE_RUNNING;
SetServiceStatus(statushandle, &status);
main2(argc, argv);
err = main2(argc, argv);
status.dwWaitHint = 0;
status.dwCurrentState = SERVICE_STOPPED;
status.dwCurrentState = SERVICE_STOPPED;
//status.dwWin32ExitCode = err;
SetServiceStatus(statushandle, &status);
}
@ -231,39 +181,9 @@ bool init_service(void) {
if(!StartServiceCtrlDispatcher(services)) {
if(GetLastError() == ERROR_FAILED_SERVICE_CONTROLLER_CONNECT) {
return false;
} else {
}
else
logger(LOG_ERR, "System call `%s' failed: %s", "StartServiceCtrlDispatcher", winerror(GetLastError()));
}
}
return true;
}
#endif
#ifndef HAVE_MINGW
/*
check for an existing tinc for this net, and write pid to pidfile
*/
static bool write_pidfile(void) {
pid_t pid;
pid = check_pid(pidfilename);
if(pid) {
if(netname)
fprintf(stderr, "A tincd is already running for net `%s' with pid %ld.\n",
netname, (long)pid);
else {
fprintf(stderr, "A tincd is already running with pid %ld.\n", (long)pid);
}
return false;
}
/* if it's locked, write-protected, or whatever */
if(!write_pid(pidfilename)) {
fprintf(stderr, "Couldn't write pid file %s: %s\n", pidfilename, strerror(errno));
return false;
}
return true;
@ -271,193 +191,72 @@ static bool write_pidfile(void) {
#endif
/*
kill older tincd for this net
*/
bool kill_other(int signal) {
#ifndef HAVE_MINGW
pid_t pid;
pid = read_pid(pidfilename);
if(!pid) {
if(netname)
fprintf(stderr, "No other tincd is running for net `%s'.\n",
netname);
else {
fprintf(stderr, "No other tincd is running.\n");
}
return false;
}
errno = 0; /* No error, sometimes errno is only changed on error */
/* ESRCH is returned when no process with that pid is found */
if(kill(pid, signal) && errno == ESRCH) {
if(netname)
fprintf(stderr, "The tincd for net `%s' is no longer running. ",
netname);
else {
fprintf(stderr, "The tincd is no longer running. ");
}
fprintf(stderr, "Removing stale lock file.\n");
remove_pid(pidfilename);
}
return true;
#else
return remove_service();
#endif
}
/*
Detach from current terminal, write pidfile, kill parent
Detach from current terminal
*/
bool detach(void) {
setup_signals();
/* First check if we can open a fresh new pidfile */
#ifndef HAVE_MINGW
if(!write_pidfile()) {
return false;
}
/* If we succeeded in doing that, detach */
signal(SIGPIPE, SIG_IGN);
signal(SIGUSR1, SIG_IGN);
signal(SIGUSR2, SIG_IGN);
signal(SIGWINCH, SIG_IGN);
closelogger();
#endif
if(do_detach) {
#ifndef HAVE_MINGW
if(daemon(0, 0)) {
fprintf(stderr, "Couldn't detach from terminal: %s",
strerror(errno));
strerror(errno));
return false;
}
/* Now UPDATE the pid in the pidfile, because we changed it... */
if(!write_pid(pidfilename)) {
fprintf(stderr, "Could not write pid file %s: %s\n", pidfilename, strerror(errno));
return false;
}
#else
if(!statushandle) {
if(!statushandle)
exit(install_service());
}
#endif
}
openlogger(identname, use_logfile ? LOGMODE_FILE : (do_detach ? LOGMODE_SYSLOG : LOGMODE_STDERR));
openlogger(identname, use_logfile?LOGMODE_FILE:(do_detach?LOGMODE_SYSLOG:LOGMODE_STDERR));
logger(LOG_NOTICE, "tincd %s starting, debug level %d",
VERSION, debug_level);
logger(LOG_NOTICE, "tincd %s (%s %s) starting, debug level %d",
VERSION, __DATE__, __TIME__, debug_level);
return true;
}
#ifdef HAVE_PUTENV
void unputenv(char *p) {
char *e = strchr(p, '=');
if(!e) {
return;
}
int len = e - p;
#ifndef HAVE_UNSETENV
#ifdef HAVE_MINGW
// Windows requires putenv("FOO=") to unset %FOO%
len++;
#endif
#endif
char var[len + 1];
memcpy(var, p, len);
var[len] = 0;
#ifdef HAVE_UNSETENV
unsetenv(var);
#else
// We must keep what we putenv() around in memory.
// To do this without memory leaks, keep things in a list and reuse if possible.
static list_t list = {};
for(list_node_t *node = list.head; node; node = node->next) {
char *data = node->data;
if(!strcmp(data, var)) {
putenv(data);
return;
}
}
char *data = xstrdup(var);
list_insert_tail(&list, data);
putenv(data);
#endif
}
#else
void putenv(const char *p) {}
void unputenv(const char *p) {}
#endif
bool execute_script(const char *name, char **envp) {
#ifdef HAVE_SYSTEM
int status, len;
char *scriptname;
char *interpreter = NULL;
config_t *cfg_interpreter;
int status, len, i;
int i;
cfg_interpreter = lookup_config(config_tree, "ScriptsInterpreter");
#ifndef HAVE_MINGW
len = xasprintf(&scriptname, "\"%s/%s\"", confbase, name);
#else
if(cfg_interpreter) {
len = xasprintf(&scriptname, "\"%s/%s\"", confbase, name);
} else {
len = xasprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
}
len = xasprintf(&scriptname, "\"%s/%s.bat\"", confbase, name);
#endif
if(len < 0) {
if(len < 0)
return false;
}
scriptname[len - 1] = '\0';
#ifndef HAVE_TUNEMU
/* First check if there is a script */
if(access(scriptname + 1, F_OK)) {
free(scriptname);
return true;
}
// Custom scripts interpreter
if(get_config_string(cfg_interpreter, &interpreter)) {
// Force custom scripts interpreter allowing execution of scripts on android without execution flag (such as on /sdcard)
free(scriptname);
len = xasprintf(&scriptname, "%s \"%s/%s\"", interpreter, confbase, name);
free(interpreter);
if(len < 0) {
return false;
}
}
#endif
ifdebug(STATUS) logger(LOG_INFO, "Executing script %s", name);
#ifdef HAVE_PUTENV
/* Set environment */
for(i = 0; envp[i]; i++) {
for(i = 0; envp[i]; i++)
putenv(envp[i]);
}
#endif
scriptname[len - 1] = '\"';
status = system(scriptname);
@ -467,212 +266,36 @@ bool execute_script(const char *name, char **envp) {
/* Unset environment */
for(i = 0; envp[i]; i++) {
unputenv(envp[i]);
char *e = strchr(envp[i], '=');
if(e) {
char p[e - envp[i] + 1];
strncpy(p, envp[i], e - envp[i]);
p[e - envp[i]] = '\0';
putenv(p);
}
}
if(status != -1) {
#ifdef WEXITSTATUS
if(WIFEXITED(status)) { /* Child exited by itself */
if(status != -1) {
if(WIFEXITED(status)) { /* Child exited by itself */
if(WEXITSTATUS(status)) {
logger(LOG_ERR, "Script %s exited with non-zero status %d",
name, WEXITSTATUS(status));
name, WEXITSTATUS(status));
return false;
}
} else if(WIFSIGNALED(status)) { /* Child was killed by a signal */
} else if(WIFSIGNALED(status)) { /* Child was killed by a signal */
logger(LOG_ERR, "Script %s was killed by signal %d (%s)",
name, WTERMSIG(status), strsignal(WTERMSIG(status)));
name, WTERMSIG(status), strsignal(WTERMSIG(status)));
return false;
} else { /* Something strange happened */
} else { /* Something strange happened */
logger(LOG_ERR, "Script %s terminated abnormally", name);
return false;
}
#endif
} else {
logger(LOG_ERR, "System call `%s' failed: %s", "system", strerror(errno));
return false;
}
#endif
#endif
return true;
}
/*
Signal handlers.
*/
#ifndef HAVE_MINGW
static RETSIGTYPE sigterm_handler(int a) {
(void)a;
logger(LOG_NOTICE, "Got %s signal", "TERM");
if(running) {
running = false;
} else {
exit(1);
}
}
static RETSIGTYPE sigquit_handler(int a) {
(void)a;
logger(LOG_NOTICE, "Got %s signal", "QUIT");
if(running) {
running = false;
} else {
exit(1);
}
}
static RETSIGTYPE fatal_signal_square(int a) {
logger(LOG_ERR, "Got another fatal signal %d (%s): not restarting.", a,
strsignal(a));
exit(1);
}
static RETSIGTYPE fatal_signal_handler(int a) {
struct sigaction act;
logger(LOG_ERR, "Got fatal signal %d (%s)", a, strsignal(a));
if(do_detach) {
logger(LOG_NOTICE, "Trying to re-execute in 5 seconds...");
act.sa_handler = fatal_signal_square;
act.sa_mask = emptysigset;
act.sa_flags = 0;
sigaction(SIGSEGV, &act, NULL);
close_network_connections();
sleep(5);
remove_pid(pidfilename);
execvp(g_argv[0], g_argv);
} else {
logger(LOG_NOTICE, "Not restarting.");
exit(1);
}
}
static RETSIGTYPE sighup_handler(int a) {
(void)a;
logger(LOG_NOTICE, "Got %s signal", "HUP");
sighup = true;
}
static RETSIGTYPE sigint_handler(int a) {
(void)a;
static int saved_debug_level = -1;
logger(LOG_NOTICE, "Got %s signal", "INT");
if(saved_debug_level != -1) {
logger(LOG_NOTICE, "Reverting to old debug level (%d)",
saved_debug_level);
debug_level = saved_debug_level;
saved_debug_level = -1;
} else {
logger(LOG_NOTICE,
"Temporarily setting debug level to 5. Kill me with SIGINT again to go back to level %d.",
debug_level);
saved_debug_level = debug_level;
debug_level = 5;
}
}
static RETSIGTYPE sigalrm_handler(int a) {
(void)a;
logger(LOG_NOTICE, "Got %s signal", "ALRM");
sigalrm = true;
}
static RETSIGTYPE sigusr1_handler(int a) {
(void)a;
dump_connections();
}
static RETSIGTYPE sigusr2_handler(int a) {
(void)a;
devops.dump_stats();
dump_nodes();
dump_edges();
dump_subnets();
}
static RETSIGTYPE sigwinch_handler(int a) {
(void)a;
do_purge = true;
}
static RETSIGTYPE unexpected_signal_handler(int a) {
(void)a;
logger(LOG_WARNING, "Got unexpected signal %d (%s)", a, strsignal(a));
}
static RETSIGTYPE ignore_signal_handler(int a) {
(void)a;
ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Ignored signal %d (%s)", a, strsignal(a));
}
static struct {
int signal;
void (*handler)(int);
} sighandlers[] = {
{SIGHUP, sighup_handler},
{SIGTERM, sigterm_handler},
{SIGQUIT, sigquit_handler},
{SIGSEGV, fatal_signal_handler},
{SIGBUS, fatal_signal_handler},
{SIGILL, fatal_signal_handler},
{SIGPIPE, ignore_signal_handler},
{SIGINT, sigint_handler},
{SIGUSR1, sigusr1_handler},
{SIGUSR2, sigusr2_handler},
{SIGCHLD, ignore_signal_handler},
{SIGALRM, sigalrm_handler},
{SIGWINCH, sigwinch_handler},
{SIGABRT, SIG_DFL},
{0, NULL}
};
#endif
void setup_signals(void) {
#ifndef HAVE_MINGW
int i;
struct sigaction act;
sigemptyset(&emptysigset);
act.sa_handler = NULL;
act.sa_mask = emptysigset;
act.sa_flags = 0;
/* Set a default signal handler for every signal, errors will be
ignored. */
for(i = 1; i < NSIG; i++) {
if(!do_detach) {
act.sa_handler = SIG_DFL;
} else {
act.sa_handler = unexpected_signal_handler;
}
sigaction(i, &act, NULL);
}
/* If we didn't detach, allow coredumps */
if(!do_detach) {
sighandlers[3].handler = SIG_DFL;
}
/* Then, for each known signal that we want to catch, assign a
handler to the signal, with error checking this time. */
for(i = 0; sighandlers[i].signal; i++) {
act.sa_handler = sighandlers[i].handler;
if(sigaction(sighandlers[i].signal, &act, NULL) < 0)
fprintf(stderr, "Installing signal handler for signal %d (%s) failed: %s\n",
sighandlers[i].signal, strsignal(sighandlers[i].signal),
strerror(errno));
}
#endif
}