+++ /dev/null
-/*
- control.c -- Control socket handling.
- Copyright (C) 2013 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
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#include "system.h"
-#include "crypto.h"
-#include "conf.h"
-#include "control.h"
-#include "control_common.h"
-#include "graph.h"
-#include "logger.h"
-#include "meta.h"
-#include "names.h"
-#include "net.h"
-#include "netutl.h"
-#include "protocol.h"
-#include "route.h"
-#include "utils.h"
-#include "xalloc.h"
-
-char controlcookie[65];
-
-static bool control_return(connection_t *c, int type, int error) {
- return send_request(c, "%d %d %d", CONTROL, type, error);
-}
-
-static bool control_ok(connection_t *c, int type) {
- return control_return(c, type, 0);
-}
-
-bool control_h(connection_t *c, const char *request) {
- int type;
-
- if(!c->status.control || c->allow_request != CONTROL) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unauthorized control request from %s (%s)", c->name, c->hostname);
- return false;
- }
-
- if(sscanf(request, "%*d %d", &type) != 1) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Got bad %s from %s (%s)", "CONTROL", c->name, c->hostname);
- return false;
- }
-
- switch (type) {
- case REQ_STOP:
- event_exit();
- return control_ok(c, REQ_STOP);
-
- case REQ_DUMP_NODES:
- return dump_nodes(c);
-
- case REQ_DUMP_EDGES:
- return dump_edges(c);
-
- case REQ_DUMP_SUBNETS:
- return dump_subnets(c);
-
- case REQ_DUMP_CONNECTIONS:
- return dump_connections(c);
-
- case REQ_PURGE:
- purge();
- return control_ok(c, REQ_PURGE);
-
- case REQ_SET_DEBUG: {
- int new_level;
- if(sscanf(request, "%*d %*d %d", &new_level) != 1)
- return false;
- send_request(c, "%d %d %d", CONTROL, REQ_SET_DEBUG, debug_level);
- if(new_level >= 0)
- debug_level = new_level;
- return true;
- }
-
- case REQ_RETRY:
- retry();
- return control_ok(c, REQ_RETRY);
-
- case REQ_RELOAD:
- logger(DEBUG_ALWAYS, LOG_NOTICE, "Got '%s' command", "reload");
- int result = reload_configuration();
- return control_return(c, REQ_RELOAD, result);
-
- case REQ_DISCONNECT: {
- char name[MAX_STRING_SIZE];
- bool found = false;
-
- if(sscanf(request, "%*d %*d " MAX_STRING, name) != 1)
- return control_return(c, REQ_DISCONNECT, -1);
-
- for list_each(connection_t, other, connection_list) {
- if(strcmp(other->name, name))
- continue;
- terminate_connection(other, other->status.active);
- found = true;
- }
-
- return control_return(c, REQ_DISCONNECT, found ? 0 : -2);
- }
-
- case REQ_DUMP_TRAFFIC:
- return dump_traffic(c);
-
- case REQ_PCAP:
- sscanf(request, "%*d %*d %d", &c->outmaclength);
- c->status.pcap = true;
- pcap = true;
- return true;
-
- case REQ_LOG:
- sscanf(request, "%*d %*d %d", &c->outcompression);
- c->status.log = true;
- logcontrol = true;
- return true;
-
- default:
- return send_request(c, "%d %d", CONTROL, REQ_INVALID);
- }
-}
-
-bool init_control(void) {
- randomize(controlcookie, sizeof controlcookie / 2);
- bin2hex(controlcookie, controlcookie, sizeof controlcookie / 2);
-
- mode_t mask = umask(0);
- umask(mask | 077);
- FILE *f = fopen(pidfilename, "w");
- umask(mask);
-
- if(!f) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Cannot write control socket cookie file %s: %s", pidfilename, strerror(errno));
- return false;
- }
-
- // Get the address and port of the first listening socket
-
- char *localhost = NULL;
- sockaddr_t sa;
- socklen_t len = sizeof sa;
-
- // Make sure we have a valid address, and map 0.0.0.0 and :: to 127.0.0.1 and ::1.
-
- if(getsockname(listen_socket[0].tcp.fd, (struct sockaddr *)&sa, &len)) {
- xasprintf(&localhost, "127.0.0.1 port %s", myport);
- } else {
- if(sa.sa.sa_family == AF_INET) {
- if(sa.in.sin_addr.s_addr == 0)
- sa.in.sin_addr.s_addr = htonl(0x7f000001);
- } else if(sa.sa.sa_family == AF_INET6) {
- static const uint8_t zero[16] = {0};
- if(!memcmp(sa.in6.sin6_addr.s6_addr, zero, sizeof zero))
- sa.in6.sin6_addr.s6_addr[15] = 1;
- }
-
- localhost = sockaddr2hostname(&sa);
- }
-
- fprintf(f, "%d %s %s\n", (int)getpid(), controlcookie, localhost);
-
- free(localhost);
- fclose(f);
-
-#ifndef HAVE_MINGW
- int unix_fd = socket(AF_UNIX, SOCK_STREAM, 0);
- if(unix_fd < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not create UNIX socket: %s", sockstrerror(errno));
- return false;
- }
-
- struct sockaddr_un sa_un;
- sa_un.sun_family = AF_UNIX;
- strncpy(sa_un.sun_path, unixsocketname, sizeof sa_un.sun_path);
-
- if(connect(unix_fd, (struct sockaddr *)&sa_un, sizeof sa_un) >= 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "UNIX socket %s is still in use!", unixsocketname);
- return false;
- }
-
- unlink(unixsocketname);
-
- umask(mask | 077);
- int result = bind(unix_fd, (struct sockaddr *)&sa_un, sizeof sa_un);
- umask(mask);
-
- if(result < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind UNIX socket to %s: %s", unixsocketname, sockstrerror(errno));
- return false;
- }
-
- if(listen(unix_fd, 3) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Could not listen on UNIX socket %s: %s", unixsocketname, sockstrerror(errno));
- return false;
- }
-
- io_add(&unix_socket, handle_new_unix_connection, &unix_socket, unix_fd, IO_READ);
-#endif
-
- return true;
-}
-
-void exit_control(void) {
-#ifndef HAVE_MINGW
- unlink(unixsocketname);
- io_del(&unix_socket);
- close(unix_socket.fd);
-#endif
-
- unlink(pidfilename);
-}
projects / meshlink / blobdiff