From bfc3c4eaac4eec6a2e714b7483b646d8ee21efc9 Mon Sep 17 00:00:00 2001 From: Maxim Biro Date: Wed, 30 Dec 2015 23:43:04 -0500 Subject: Add logger object to be able to support multiple logging backends --- other/bootstrap_daemon/src/global.h | 30 ++ other/bootstrap_daemon/src/logger.c | 112 +++++ other/bootstrap_daemon/src/logger.h | 63 +++ other/bootstrap_daemon/src/tox-bootstrapd.c | 730 ++++++++++++++++++++++++++++ other/bootstrap_daemon/tox-bootstrapd.c | 730 ---------------------------- 5 files changed, 935 insertions(+), 730 deletions(-) create mode 100644 other/bootstrap_daemon/src/global.h create mode 100644 other/bootstrap_daemon/src/logger.c create mode 100644 other/bootstrap_daemon/src/logger.h create mode 100644 other/bootstrap_daemon/src/tox-bootstrapd.c delete mode 100644 other/bootstrap_daemon/tox-bootstrapd.c diff --git a/other/bootstrap_daemon/src/global.h b/other/bootstrap_daemon/src/global.h new file mode 100644 index 00000000..7aa42780 --- /dev/null +++ b/other/bootstrap_daemon/src/global.h @@ -0,0 +1,30 @@ +/* global.h + * + * Tox DHT bootstrap daemon. + * + * Copyright (C) 2015 Tox project All Rights Reserved. + * + * This file is part of Tox. + * + * Tox 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 3 of the License, or + * (at your option) any later version. + * + * Tox 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 Tox. If not, see . + * + */ + +#ifndef GLOBAL_H +#define GLOBAL_H + +#define DAEMON_NAME "tox-bootstrapd" +#define DAEMON_VERSION_NUMBER 2014101200UL // yyyymmmddvv format: yyyy year, mm month, dd day, vv version change count for that day + +#endif // GLOBAL_H diff --git a/other/bootstrap_daemon/src/logger.c b/other/bootstrap_daemon/src/logger.c new file mode 100644 index 00000000..3cf18fd6 --- /dev/null +++ b/other/bootstrap_daemon/src/logger.c @@ -0,0 +1,112 @@ +/* logger.c + * + * Tox DHT bootstrap daemon. + * + * Copyright (C) 2015 Tox project All Rights Reserved. + * + * This file is part of Tox. + * + * Tox 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 3 of the License, or + * (at your option) any later version. + * + * Tox 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 Tox. If not, see . + * + */ + +#include "logger.h" + +#include "global.h" + +#include + +#include +#include + +typedef struct Logger { + LOGGER_BACKEND backend; +} Logger; + +Logger* new_logger(LOGGER_BACKEND backend) +{ + if (backend == LOGGER_BACKEND_SYSLOG) { + openlog(DAEMON_NAME, LOG_NOWAIT | LOG_PID, LOG_DAEMON); + } + + Logger* logger = malloc(sizeof(Logger)); + + if (logger == NULL) { + return NULL; + } + + logger->backend = backend; + + return logger; +} + +void kill_logger(Logger* logger) +{ + if (backend == LOGGER_BACKEND_SYSLOG) { + closelog(); + } + + free(logger); +} + +int level_syslog(LOG_LEVEL level) +{ + switch (level) { + case LOG_LEVEL_INFO: + return LOG_INFO; + case LOG_LEVEL_WARNING: + return LOG_WARNING; + case LOG_LEVEL_ERROR: + return LOG_ERR; + } +} + +void log_syslog(LOG_LEVEL level, const char *format, va_list args) +{ + vsyslog(level_syslog(level), format, args); +} + +FILE* level_stdout(LOG_LEVEL level) +{ + switch (level) { + case LOG_LEVEL_INFO: + return stdout; + case LOG_LEVEL_WARNING: // intentional fallthrough + case LOG_LEVEL_ERROR: + return stderr; + + } +} + +void log_stdout(LOG_LEVEL level, const char *format, va_list args) +{ + vfprintf(level_stdout(level), format, args); +} + +void log(Logger* logger, LOG_LEVEL level, const char *format, ...) +{ + va_list args; + va_start(args, format); + + switch (logger->backend) { + case LOGGER_BACKEND_SYSLOG: + log_syslog(level, format, args); + break; + case LOGGER_BACKEND_STDOUT: + log_stdout(level, format, args); + break; + } + + va_end(args); +} diff --git a/other/bootstrap_daemon/src/logger.h b/other/bootstrap_daemon/src/logger.h new file mode 100644 index 00000000..174d3445 --- /dev/null +++ b/other/bootstrap_daemon/src/logger.h @@ -0,0 +1,63 @@ +/* logger.h + * + * Tox DHT bootstrap daemon. + * + * Copyright (C) 2015 Tox project All Rights Reserved. + * + * This file is part of Tox. + * + * Tox 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 3 of the License, or + * (at your option) any later version. + * + * Tox 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 Tox. If not, see . + * + */ + +#ifndef LOGGER_H +#define LOGGER_H + +typedef enum LOGGER_BACKEND { + LOGGER_BACKEND_SYSLOG, + LOGGER_BACKEND_STDOUT +} LOGGER_BACKEND; + +typedef enum LOG_LEVEL { + LOG_LEVEL_INFO, + LOG_LEVEL_WARNING, + LOG_LEVEL_ERROR +} LOG_LEVEL; + +typedef struct Logger Logger; + +/** + * Creates new logger. + * @param backend Specifies which backend the logger should use. + * @return Logger object on success, NULL on failure. + */ +Logger* new_logger(LOGGER_BACKEND backend); + +/** + * Destroys a logger object, releasing all used resources. + * @param logger Logger object to destroy. + */ +void kill_logger(Logger* logger); + +/** + * Logs a message. + * @param logger Logger object to use. + * @param level Log level to use. + * @param format printf-like format string. + * @param ... Zero or more arguments, similar to printf function. + */ +void log(Logger* logger, LOG_LEVEL level, const char *format, ...); + + +#endif // LOGGER_H diff --git a/other/bootstrap_daemon/src/tox-bootstrapd.c b/other/bootstrap_daemon/src/tox-bootstrapd.c new file mode 100644 index 00000000..71b1386d --- /dev/null +++ b/other/bootstrap_daemon/src/tox-bootstrapd.c @@ -0,0 +1,730 @@ +/* tox-bootstrapd.c + * + * Tox DHT bootstrap daemon. + * + * Copyright (C) 2014 Tox project All Rights Reserved. + * + * This file is part of Tox. + * + * Tox 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 3 of the License, or + * (at your option) any later version. + * + * Tox 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 Tox. If not, see . + * + */ + +// system provided +#include +#include +#include +#include +#include + +// C +#include +#include +#include + +// 3rd party +#include + +// ./configure +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +// toxcore +#include "../../toxcore/LAN_discovery.h" +#include "../../toxcore/onion_announce.h" +#include "../../toxcore/TCP_server.h" +#include "../../toxcore/util.h" + +// misc +#include "../bootstrap_node_packets.c" +#include "../../testing/misc_tools.c" + + +#define DAEMON_NAME "tox-bootstrapd" +#define DAEMON_VERSION_NUMBER 2014101200UL // yyyymmmddvv format: yyyy year, mm month, dd day, vv version change count for that day + +#define SLEEP_TIME_MILLISECONDS 30 +#define sleep usleep(1000*SLEEP_TIME_MILLISECONDS) + +#define DEFAULT_PID_FILE_PATH "tox-bootstrapd.pid" +#define DEFAULT_KEYS_FILE_PATH "tox-bootstrapd.keys" +#define DEFAULT_PORT 33445 +#define DEFAULT_ENABLE_IPV6 1 // 1 - true, 0 - false +#define DEFAULT_ENABLE_IPV4_FALLBACK 1 // 1 - true, 0 - false +#define DEFAULT_ENABLE_LAN_DISCOVERY 1 // 1 - true, 0 - false +#define DEFAULT_ENABLE_TCP_RELAY 1 // 1 - true, 0 - false +#define DEFAULT_TCP_RELAY_PORTS 443, 3389, 33445 // comma-separated list of ports. make sure to adjust DEFAULT_TCP_RELAY_PORTS_COUNT accordingly +#define DEFAULT_TCP_RELAY_PORTS_COUNT 3 +#define DEFAULT_ENABLE_MOTD 1 // 1 - true, 0 - false +#define DEFAULT_MOTD DAEMON_NAME + +#define MIN_ALLOWED_PORT 1 +#define MAX_ALLOWED_PORT 65535 + + +// Uses the already existing key or creates one if it didn't exist +// +// retirns 1 on success +// 0 on failure - no keys were read or stored + +int manage_keys(DHT *dht, char *keys_file_path) +{ + const uint32_t KEYS_SIZE = crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES; + uint8_t keys[KEYS_SIZE]; + FILE *keys_file; + + // Check if file exits, proceed to open and load keys + keys_file = fopen(keys_file_path, "r"); + + if (keys_file != NULL) { + const size_t read_size = fread(keys, sizeof(uint8_t), KEYS_SIZE, keys_file); + + if (read_size != KEYS_SIZE) { + fclose(keys_file); + return 0; + } + + memcpy(dht->self_public_key, keys, crypto_box_PUBLICKEYBYTES); + memcpy(dht->self_secret_key, keys + crypto_box_PUBLICKEYBYTES, crypto_box_SECRETKEYBYTES); + } else { + // Otherwise save new keys + memcpy(keys, dht->self_public_key, crypto_box_PUBLICKEYBYTES); + memcpy(keys + crypto_box_PUBLICKEYBYTES, dht->self_secret_key, crypto_box_SECRETKEYBYTES); + + keys_file = fopen(keys_file_path, "w"); + + if (!keys_file) + return 0; + + const size_t write_size = fwrite(keys, sizeof(uint8_t), KEYS_SIZE, keys_file); + + if (write_size != KEYS_SIZE) { + fclose(keys_file); + return 0; + } + } + + fclose(keys_file); + + return 1; +} + +// Parses tcp relay ports from `cfg` and puts them into `tcp_relay_ports` array +// +// Supposed to be called from get_general_config only +// +// Important: iff `tcp_relay_port_count` > 0, then you are responsible for freeing `tcp_relay_ports` + +void parse_tcp_relay_ports_config(config_t *cfg, uint16_t **tcp_relay_ports, int *tcp_relay_port_count) +{ + const char *NAME_TCP_RELAY_PORTS = "tcp_relay_ports"; + + *tcp_relay_port_count = 0; + + config_setting_t *ports_array = config_lookup(cfg, NAME_TCP_RELAY_PORTS); + + if (ports_array == NULL) { + syslog(LOG_WARNING, "No '%s' setting in the configuration file.\n", NAME_TCP_RELAY_PORTS); + syslog(LOG_WARNING, "Using default '%s':\n", NAME_TCP_RELAY_PORTS); + + uint16_t default_ports[DEFAULT_TCP_RELAY_PORTS_COUNT] = {DEFAULT_TCP_RELAY_PORTS}; + + int i; + + for (i = 0; i < DEFAULT_TCP_RELAY_PORTS_COUNT; i ++) { + syslog(LOG_INFO, "Port #%d: %u\n", i, default_ports[i]); + } + + // similar procedure to the one of reading config file below + *tcp_relay_ports = malloc(DEFAULT_TCP_RELAY_PORTS_COUNT * sizeof(uint16_t)); + + for (i = 0; i < DEFAULT_TCP_RELAY_PORTS_COUNT; i ++) { + + (*tcp_relay_ports)[*tcp_relay_port_count] = default_ports[i]; + + if ((*tcp_relay_ports)[*tcp_relay_port_count] < MIN_ALLOWED_PORT + || (*tcp_relay_ports)[*tcp_relay_port_count] > MAX_ALLOWED_PORT) { + syslog(LOG_WARNING, "Port #%d: Invalid port: %u, should be in [%d, %d]. Skipping.\n", i, + (*tcp_relay_ports)[*tcp_relay_port_count], MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); + continue; + } + + (*tcp_relay_port_count) ++; + } + + // the loop above skips invalid ports, so we adjust the allocated memory size + if ((*tcp_relay_port_count) > 0) { + *tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t)); + } else { + free(*tcp_relay_ports); + *tcp_relay_ports = NULL; + } + + return; + } + + if (config_setting_is_array(ports_array) == CONFIG_FALSE) { + syslog(LOG_ERR, "'%s' setting should be an array. Array syntax: 'setting = [value1, value2, ...]'.\n", + NAME_TCP_RELAY_PORTS); + return; + } + + int config_port_count = config_setting_length(ports_array); + + if (config_port_count == 0) { + syslog(LOG_ERR, "'%s' is empty.\n", NAME_TCP_RELAY_PORTS); + return; + } + + *tcp_relay_ports = malloc(config_port_count * sizeof(uint16_t)); + + int i; + + for (i = 0; i < config_port_count; i ++) { + config_setting_t *elem = config_setting_get_elem(ports_array, i); + + if (elem == NULL) { + // it's NULL if `ports_array` is not an array (we have that check earlier) or if `i` is out of range, which should not be + syslog(LOG_WARNING, "Port #%d: Something went wrong while parsing the port. Stopping reading ports.\n", i); + break; + } + + if (config_setting_is_number(elem) == CONFIG_FALSE) { + syslog(LOG_WARNING, "Port #%d: Not a number. Skipping.\n", i); + continue; + } + + (*tcp_relay_ports)[*tcp_relay_port_count] = config_setting_get_int(elem); + + if ((*tcp_relay_ports)[*tcp_relay_port_count] < MIN_ALLOWED_PORT + || (*tcp_relay_ports)[*tcp_relay_port_count] > MAX_ALLOWED_PORT) { + syslog(LOG_WARNING, "Port #%d: Invalid port: %u, should be in [%d, %d]. Skipping.\n", i, + (*tcp_relay_ports)[*tcp_relay_port_count], MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); + continue; + } + + (*tcp_relay_port_count) ++; + } + + // the loop above skips invalid ports, so we adjust the allocated memory size + if ((*tcp_relay_port_count) > 0) { + *tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t)); + } else { + free(*tcp_relay_ports); + *tcp_relay_ports = NULL; + } +} + +// Gets general config options +// +// Important: you are responsible for freeing `pid_file_path` and `keys_file_path` +// also, iff `tcp_relay_ports_count` > 0, then you are responsible for freeing `tcp_relay_ports` +// and also `motd` iff `enable_motd` is set +// +// returns 1 on success +// 0 on failure, doesn't modify any data pointed by arguments + +int get_general_config(const char *cfg_file_path, char **pid_file_path, char **keys_file_path, int *port, + int *enable_ipv6, + int *enable_ipv4_fallback, int *enable_lan_discovery, int *enable_tcp_relay, uint16_t **tcp_relay_ports, + int *tcp_relay_port_count, int *enable_motd, char **motd) +{ + config_t cfg; + + const char *NAME_PORT = "port"; + const char *NAME_PID_FILE_PATH = "pid_file_path"; + const char *NAME_KEYS_FILE_PATH = "keys_file_path"; + const char *NAME_ENABLE_IPV6 = "enable_ipv6"; + const char *NAME_ENABLE_IPV4_FALLBACK = "enable_ipv4_fallback"; + const char *NAME_ENABLE_LAN_DISCOVERY = "enable_lan_discovery"; + const char *NAME_ENABLE_TCP_RELAY = "enable_tcp_relay"; + const char *NAME_ENABLE_MOTD = "enable_motd"; + const char *NAME_MOTD = "motd"; + + config_init(&cfg); + + // Read the file. If there is an error, report it and exit. + if (config_read_file(&cfg, cfg_file_path) == CONFIG_FALSE) { + syslog(LOG_ERR, "%s:%d - %s\n", config_error_file(&cfg), config_error_line(&cfg), config_error_text(&cfg)); + config_destroy(&cfg); + return 0; + } + + // Get port + if (config_lookup_int(&cfg, NAME_PORT, port) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_PORT); + syslog(LOG_WARNING, "Using default '%s': %d\n", NAME_PORT, DEFAULT_PORT); + *port = DEFAULT_PORT; + } + + // Get PID file location + const char *tmp_pid_file; + + if (config_lookup_string(&cfg, NAME_PID_FILE_PATH, &tmp_pid_file) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_PID_FILE_PATH); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_PID_FILE_PATH, DEFAULT_PID_FILE_PATH); + tmp_pid_file = DEFAULT_PID_FILE_PATH; + } + + *pid_file_path = malloc(strlen(tmp_pid_file) + 1); + strcpy(*pid_file_path, tmp_pid_file); + + // Get keys file location + const char *tmp_keys_file; + + if (config_lookup_string(&cfg, NAME_KEYS_FILE_PATH, &tmp_keys_file) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_KEYS_FILE_PATH); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_KEYS_FILE_PATH, DEFAULT_KEYS_FILE_PATH); + tmp_keys_file = DEFAULT_KEYS_FILE_PATH; + } + + *keys_file_path = malloc(strlen(tmp_keys_file) + 1); + strcpy(*keys_file_path, tmp_keys_file); + + // Get IPv6 option + if (config_lookup_bool(&cfg, NAME_ENABLE_IPV6, enable_ipv6) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_IPV6); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_IPV6, DEFAULT_ENABLE_IPV6 ? "true" : "false"); + *enable_ipv6 = DEFAULT_ENABLE_IPV6; + } + + // Get IPv4 fallback option + if (config_lookup_bool(&cfg, NAME_ENABLE_IPV4_FALLBACK, enable_ipv4_fallback) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_IPV4_FALLBACK); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_IPV4_FALLBACK, + DEFAULT_ENABLE_IPV4_FALLBACK ? "true" : "false"); + *enable_ipv4_fallback = DEFAULT_ENABLE_IPV4_FALLBACK; + } + + // Get LAN discovery option + if (config_lookup_bool(&cfg, NAME_ENABLE_LAN_DISCOVERY, enable_lan_discovery) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_LAN_DISCOVERY); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_LAN_DISCOVERY, + DEFAULT_ENABLE_LAN_DISCOVERY ? "true" : "false"); + *enable_lan_discovery = DEFAULT_ENABLE_LAN_DISCOVERY; + } + + // Get TCP relay option + if (config_lookup_bool(&cfg, NAME_ENABLE_TCP_RELAY, enable_tcp_relay) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_TCP_RELAY); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_TCP_RELAY, + DEFAULT_ENABLE_TCP_RELAY ? "true" : "false"); + *enable_tcp_relay = DEFAULT_ENABLE_TCP_RELAY; + } + + if (*enable_tcp_relay) { + parse_tcp_relay_ports_config(&cfg, tcp_relay_ports, tcp_relay_port_count); + } else { + *tcp_relay_port_count = 0; + } + + // Get MOTD option + if (config_lookup_bool(&cfg, NAME_ENABLE_MOTD, enable_motd) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_MOTD); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_MOTD, + DEFAULT_ENABLE_MOTD ? "true" : "false"); + *enable_motd = DEFAULT_ENABLE_MOTD; + } + + if (*enable_motd) { + // Get MOTD + const char *tmp_motd; + + if (config_lookup_string(&cfg, NAME_MOTD, &tmp_motd) == CONFIG_FALSE) { + syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_MOTD); + syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_MOTD, DEFAULT_MOTD); + tmp_motd = DEFAULT_MOTD; + } + + size_t tmp_motd_length = strlen(tmp_motd) + 1; + size_t motd_length = tmp_motd_length > MAX_MOTD_LENGTH ? MAX_MOTD_LENGTH : tmp_motd_length; + *motd = malloc(motd_length); + strncpy(*motd, tmp_motd, motd_length); + (*motd)[motd_length - 1] = '\0'; + } + + config_destroy(&cfg); + + syslog(LOG_INFO, "Successfully read:\n"); + syslog(LOG_INFO, "'%s': %s\n", NAME_PID_FILE_PATH, *pid_file_path); + syslog(LOG_INFO, "'%s': %s\n", NAME_KEYS_FILE_PATH, *keys_file_path); + syslog(LOG_INFO, "'%s': %d\n", NAME_PORT, *port); + syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_IPV6, *enable_ipv6 ? "true" : "false"); + syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_IPV4_FALLBACK, *enable_ipv4_fallback ? "true" : "false"); + syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_LAN_DISCOVERY, *enable_lan_discovery ? "true" : "false"); + + syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_TCP_RELAY, *enable_tcp_relay ? "true" : "false"); + + // show info about tcp ports only if tcp relay is enabled + if (*enable_tcp_relay) { + if (*tcp_relay_port_count == 0) { + syslog(LOG_ERR, "No TCP ports could be read.\n"); + } else { + syslog(LOG_INFO, "Read %d TCP ports:\n", *tcp_relay_port_count); + int i; + + for (i = 0; i < *tcp_relay_port_count; i ++) { + syslog(LOG_INFO, "Port #%d: %u\n", i, (*tcp_relay_ports)[i]); + } + } + } + + syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_MOTD, *enable_motd ? "true" : "false"); + + if (*enable_motd) { + syslog(LOG_INFO, "'%s': %s\n", NAME_MOTD, *motd); + } + + return 1; +} + +// Bootstraps nodes listed in the config file +// +// returns 1 on success, some or no bootstrap nodes were added +// 0 on failure, a error accured while parsing config file + +int bootstrap_from_config(const char *cfg_file_path, DHT *dht, int enable_ipv6) +{ + const char *NAME_BOOTSTRAP_NODES = "bootstrap_nodes"; + + const char *NAME_PUBLIC_KEY = "public_key"; + const char *NAME_PORT = "port"; + const char *NAME_ADDRESS = "address"; + + config_t cfg; + + config_init(&cfg); + + if (config_read_file(&cfg, cfg_file_path) == CONFIG_FALSE) { + syslog(LOG_ERR, "%s:%d - %s\n", config_error_file(&cfg), config_error_line(&cfg), config_error_text(&cfg)); + config_destroy(&cfg); + return 0; + } + + config_setting_t *node_list = config_lookup(&cfg, NAME_BOOTSTRAP_NODES); + + if (node_list == NULL) { + syslog(LOG_WARNING, "No '%s' setting in the configuration file. Skipping bootstrapping.\n", NAME_BOOTSTRAP_NODES); + config_destroy(&cfg); + return 1; + } + + if (config_setting_length(node_list) == 0) { + syslog(LOG_WARNING, "No bootstrap nodes found. Skipping bootstrapping.\n"); + config_destroy(&cfg); + return 1; + } + + int bs_port; + const char *bs_address; + const char *bs_public_key; + + config_setting_t *node; + + int i = 0; + + while (config_setting_length(node_list)) { + + node = config_setting_get_elem(node_list, 0); + + if (node == NULL) { + config_destroy(&cfg); + return 0; + } + + // Check that all settings are present + if (config_setting_lookup_string(node, NAME_PUBLIC_KEY, &bs_public_key) == CONFIG_FALSE) { + syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_PUBLIC_KEY); + goto next; + } + + if (config_setting_lookup_int(node, NAME_PORT, &bs_port) == CONFIG_FALSE) { + syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_PORT); + goto next; + } + + if (config_setting_lookup_string(node, NAME_ADDRESS, &bs_address) == CONFIG_FALSE) { + syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_ADDRESS); + goto next; + } + + // Process settings + if (strlen(bs_public_key) != crypto_box_PUBLICKEYBYTES * 2) { + syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %s. Skipping the node.\n", i, NAME_PUBLIC_KEY, + bs_public_key); + goto next; + } + + if (bs_port < MIN_ALLOWED_PORT || bs_port > MAX_ALLOWED_PORT) { + syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %d, should be in [%d, %d]. Skipping the node.\n", i, NAME_PORT, + bs_port, MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); + goto next; + } + + uint8_t *bs_public_key_bin = hex_string_to_bin((char *)bs_public_key); + const int address_resolved = DHT_bootstrap_from_address(dht, bs_address, enable_ipv6, htons(bs_port), + bs_public_key_bin); + free(bs_public_key_bin); + + if (!address_resolved) { + syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %s. Skipping the node.\n", i, NAME_ADDRESS, bs_address); + goto next; + } + + syslog(LOG_INFO, "Successfully added bootstrap node #%d: %s:%d %s\n", i, bs_address, bs_port, bs_public_key); + +next: + // config_setting_lookup_string() allocates string inside and doesn't allow us to free it direcly + // though it's freed when the element is removed, so we free it right away in order to keep memory + // consumption minimal + config_setting_remove_elem(node_list, 0); + i++; + } + + config_destroy(&cfg); + + return 1; +} + +// Prints public key + +void print_public_key(const uint8_t *public_key) +{ + char buffer[2 * crypto_box_PUBLICKEYBYTES + 1]; + int index = 0; + + size_t i; + + for (i = 0; i < crypto_box_PUBLICKEYBYTES; i++) { + index += sprintf(buffer + index, "%02hhX", public_key[i]); + } + + syslog(LOG_INFO, "Public Key: %s\n", buffer); + + return; +} + +int main(int argc, char *argv[]) +{ + openlog(DAEMON_NAME, LOG_NOWAIT | LOG_PID, LOG_DAEMON); + + syslog(LOG_INFO, "Running \"%s\" version %lu.\n", DAEMON_NAME, DAEMON_VERSION_NUMBER); + + if (argc < 2) { + syslog(LOG_ERR, "Please specify a path to a configuration file as the first argument. Exiting.\n"); + return 1; + } + + const char *cfg_file_path = argv[1]; + char *pid_file_path, *keys_file_path; + int port; + int enable_ipv6; + int enable_ipv4_fallback; + int enable_lan_discovery; + int enable_tcp_relay; + uint16_t *tcp_relay_ports; + int tcp_relay_port_count; + int enable_motd; + char *motd; + + if (get_general_config(cfg_file_path, &pid_file_path, &keys_file_path, &port, &enable_ipv6, &enable_ipv4_fallback, + &enable_lan_discovery, &enable_tcp_relay, &tcp_relay_ports, &tcp_relay_port_count, &enable_motd, &motd)) { + syslog(LOG_INFO, "General config read successfully\n"); + } else { + syslog(LOG_ERR, "Couldn't read config file: %s. Exiting.\n", cfg_file_path); + return 1; + } + + if (port < MIN_ALLOWED_PORT || port > MAX_ALLOWED_PORT) { + syslog(LOG_ERR, "Invalid port: %d, should be in [%d, %d]. Exiting.\n", port, MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); + return 1; + } + + // Check if the PID file exists + FILE *pid_file; + + if ((pid_file = fopen(pid_file_path, "r"))) { + syslog(LOG_WARNING, "Another instance of the daemon is already running, PID file %s exists.\n", pid_file_path); + fclose(pid_file); + } + + IP ip; + ip_init(&ip, enable_ipv6); + + Networking_Core *net = new_networking(ip, port); + + if (net == NULL) { + if (enable_ipv6 && enable_ipv4_fallback) { + syslog(LOG_WARNING, "Couldn't initialize IPv6 networking. Falling back to using IPv4.\n"); + enable_ipv6 = 0; + ip_init(&ip, enable_ipv6); + net = new_networking(ip, port); + + if (net == NULL) { + syslog(LOG_ERR, "Couldn't fallback to IPv4. Exiting.\n"); + return 1; + } + } else { + syslog(LOG_ERR, "Couldn't initialize networking. Exiting.\n"); + return 1; + } + } + + + DHT *dht = new_DHT(net); + + if (dht == NULL) { + syslog(LOG_ERR, "Couldn't initialize Tox DHT instance. Exiting.\n"); + return 1; + } + + Onion *onion = new_onion(dht); + Onion_Announce *onion_a = new_onion_announce(dht); + + if (!(onion && onion_a)) { + syslog(LOG_ERR, "Couldn't initialize Tox Onion. Exiting.\n"); + return 1; + } + + if (enable_motd) { + if (bootstrap_set_callbacks(dht->net, DAEMON_VERSION_NUMBER, (uint8_t *)motd, strlen(motd) + 1) == 0) { + syslog(LOG_INFO, "Set MOTD successfully.\n"); + } else { + syslog(LOG_ERR, "Couldn't set MOTD: %s. Exiting.\n", motd); + return 1; + } + + free(motd); + } + + if (manage_keys(dht, keys_file_path)) { + syslog(LOG_INFO, "Keys are managed successfully.\n"); + } else { + syslog(LOG_ERR, "Couldn't read/write: %s. Exiting.\n", keys_file_path); + return 1; + } + + TCP_Server *tcp_server = NULL; + + if (enable_tcp_relay) { + if (tcp_relay_port_count == 0) { + syslog(LOG_ERR, "No TCP relay ports read. Exiting.\n"); + return 1; + } + + tcp_server = new_TCP_server(enable_ipv6, tcp_relay_port_count, tcp_relay_ports, dht->self_secret_key, onion); + + // tcp_relay_port_count != 0 at this point + free(tcp_relay_ports); + + if (tcp_server != NULL) { + syslog(LOG_INFO, "Initialized Tox TCP server successfully.\n"); + } else { + syslog(LOG_ERR, "Couldn't initialize Tox TCP server. Exiting.\n"); + return 1; + } + } + + if (bootstrap_from_config(cfg_file_path, dht, enable_ipv6)) { + syslog(LOG_INFO, "List of bootstrap nodes read successfully.\n"); + } else { + syslog(LOG_ERR, "Couldn't read list of bootstrap nodes in %s. Exiting.\n", cfg_file_path); + return 1; + } + + print_public_key(dht->self_public_key); + + // Write the PID file + FILE *pidf = fopen(pid_file_path, "a+"); + + if (pidf == NULL) { + syslog(LOG_ERR, "Couldn't open the PID file for writing: %s. Exiting.\n", pid_file_path); + return 1; + } + + free(pid_file_path); + free(keys_file_path); + + // Fork off from the parent process + const pid_t pid = fork(); + + if (pid > 0) { + fprintf(pidf, "%d", pid); + fclose(pidf); + syslog(LOG_INFO, "Forked successfully: PID: %d.\n", pid); + return 0; + } else { + fclose(pidf); + } + + if (pid < 0) { + syslog(LOG_ERR, "Forking failed. Exiting.\n"); + return 1; + } + + // Change the file mode mask + umask(0); + + // Create a new SID for the child process + if (setsid() < 0) { + syslog(LOG_ERR, "SID creation failure. Exiting.\n"); + return 1; + } + + // Change the current working directory + if ((chdir("/")) < 0) { + syslog(LOG_ERR, "Couldn't change working directory to '/'. Exiting.\n"); + return 1; + } + + // Go quiet + close(STDOUT_FILENO); + close(STDIN_FILENO); + close(STDERR_FILENO); + + uint64_t last_LANdiscovery = 0; + const uint16_t htons_port = htons(port); + + int waiting_for_dht_connection = 1; + + if (enable_lan_discovery) { + LANdiscovery_init(dht); + syslog(LOG_INFO, "Initialized LAN discovery.\n"); + } + + while (1) { + do_DHT(dht); + + if (enable_lan_discovery && is_timeout(last_LANdiscovery, LAN_DISCOVERY_INTERVAL)) { + send_LANdiscovery(htons_port, dht); + last_LANdiscovery = unix_time(); + } + + if (enable_tcp_relay) { + do_TCP_server(tcp_server); + } + + networking_poll(dht->net); + + if (waiting_for_dht_connection && DHT_isconnected(dht)) { + syslog(LOG_INFO, "Connected to other bootstrap node successfully.\n"); + waiting_for_dht_connection = 0; + } + + sleep; + } + + return 1; +} diff --git a/other/bootstrap_daemon/tox-bootstrapd.c b/other/bootstrap_daemon/tox-bootstrapd.c deleted file mode 100644 index 71b1386d..00000000 --- a/other/bootstrap_daemon/tox-bootstrapd.c +++ /dev/null @@ -1,730 +0,0 @@ -/* tox-bootstrapd.c - * - * Tox DHT bootstrap daemon. - * - * Copyright (C) 2014 Tox project All Rights Reserved. - * - * This file is part of Tox. - * - * Tox 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 3 of the License, or - * (at your option) any later version. - * - * Tox 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 Tox. If not, see . - * - */ - -// system provided -#include -#include -#include -#include -#include - -// C -#include -#include -#include - -// 3rd party -#include - -// ./configure -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -// toxcore -#include "../../toxcore/LAN_discovery.h" -#include "../../toxcore/onion_announce.h" -#include "../../toxcore/TCP_server.h" -#include "../../toxcore/util.h" - -// misc -#include "../bootstrap_node_packets.c" -#include "../../testing/misc_tools.c" - - -#define DAEMON_NAME "tox-bootstrapd" -#define DAEMON_VERSION_NUMBER 2014101200UL // yyyymmmddvv format: yyyy year, mm month, dd day, vv version change count for that day - -#define SLEEP_TIME_MILLISECONDS 30 -#define sleep usleep(1000*SLEEP_TIME_MILLISECONDS) - -#define DEFAULT_PID_FILE_PATH "tox-bootstrapd.pid" -#define DEFAULT_KEYS_FILE_PATH "tox-bootstrapd.keys" -#define DEFAULT_PORT 33445 -#define DEFAULT_ENABLE_IPV6 1 // 1 - true, 0 - false -#define DEFAULT_ENABLE_IPV4_FALLBACK 1 // 1 - true, 0 - false -#define DEFAULT_ENABLE_LAN_DISCOVERY 1 // 1 - true, 0 - false -#define DEFAULT_ENABLE_TCP_RELAY 1 // 1 - true, 0 - false -#define DEFAULT_TCP_RELAY_PORTS 443, 3389, 33445 // comma-separated list of ports. make sure to adjust DEFAULT_TCP_RELAY_PORTS_COUNT accordingly -#define DEFAULT_TCP_RELAY_PORTS_COUNT 3 -#define DEFAULT_ENABLE_MOTD 1 // 1 - true, 0 - false -#define DEFAULT_MOTD DAEMON_NAME - -#define MIN_ALLOWED_PORT 1 -#define MAX_ALLOWED_PORT 65535 - - -// Uses the already existing key or creates one if it didn't exist -// -// retirns 1 on success -// 0 on failure - no keys were read or stored - -int manage_keys(DHT *dht, char *keys_file_path) -{ - const uint32_t KEYS_SIZE = crypto_box_PUBLICKEYBYTES + crypto_box_SECRETKEYBYTES; - uint8_t keys[KEYS_SIZE]; - FILE *keys_file; - - // Check if file exits, proceed to open and load keys - keys_file = fopen(keys_file_path, "r"); - - if (keys_file != NULL) { - const size_t read_size = fread(keys, sizeof(uint8_t), KEYS_SIZE, keys_file); - - if (read_size != KEYS_SIZE) { - fclose(keys_file); - return 0; - } - - memcpy(dht->self_public_key, keys, crypto_box_PUBLICKEYBYTES); - memcpy(dht->self_secret_key, keys + crypto_box_PUBLICKEYBYTES, crypto_box_SECRETKEYBYTES); - } else { - // Otherwise save new keys - memcpy(keys, dht->self_public_key, crypto_box_PUBLICKEYBYTES); - memcpy(keys + crypto_box_PUBLICKEYBYTES, dht->self_secret_key, crypto_box_SECRETKEYBYTES); - - keys_file = fopen(keys_file_path, "w"); - - if (!keys_file) - return 0; - - const size_t write_size = fwrite(keys, sizeof(uint8_t), KEYS_SIZE, keys_file); - - if (write_size != KEYS_SIZE) { - fclose(keys_file); - return 0; - } - } - - fclose(keys_file); - - return 1; -} - -// Parses tcp relay ports from `cfg` and puts them into `tcp_relay_ports` array -// -// Supposed to be called from get_general_config only -// -// Important: iff `tcp_relay_port_count` > 0, then you are responsible for freeing `tcp_relay_ports` - -void parse_tcp_relay_ports_config(config_t *cfg, uint16_t **tcp_relay_ports, int *tcp_relay_port_count) -{ - const char *NAME_TCP_RELAY_PORTS = "tcp_relay_ports"; - - *tcp_relay_port_count = 0; - - config_setting_t *ports_array = config_lookup(cfg, NAME_TCP_RELAY_PORTS); - - if (ports_array == NULL) { - syslog(LOG_WARNING, "No '%s' setting in the configuration file.\n", NAME_TCP_RELAY_PORTS); - syslog(LOG_WARNING, "Using default '%s':\n", NAME_TCP_RELAY_PORTS); - - uint16_t default_ports[DEFAULT_TCP_RELAY_PORTS_COUNT] = {DEFAULT_TCP_RELAY_PORTS}; - - int i; - - for (i = 0; i < DEFAULT_TCP_RELAY_PORTS_COUNT; i ++) { - syslog(LOG_INFO, "Port #%d: %u\n", i, default_ports[i]); - } - - // similar procedure to the one of reading config file below - *tcp_relay_ports = malloc(DEFAULT_TCP_RELAY_PORTS_COUNT * sizeof(uint16_t)); - - for (i = 0; i < DEFAULT_TCP_RELAY_PORTS_COUNT; i ++) { - - (*tcp_relay_ports)[*tcp_relay_port_count] = default_ports[i]; - - if ((*tcp_relay_ports)[*tcp_relay_port_count] < MIN_ALLOWED_PORT - || (*tcp_relay_ports)[*tcp_relay_port_count] > MAX_ALLOWED_PORT) { - syslog(LOG_WARNING, "Port #%d: Invalid port: %u, should be in [%d, %d]. Skipping.\n", i, - (*tcp_relay_ports)[*tcp_relay_port_count], MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); - continue; - } - - (*tcp_relay_port_count) ++; - } - - // the loop above skips invalid ports, so we adjust the allocated memory size - if ((*tcp_relay_port_count) > 0) { - *tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t)); - } else { - free(*tcp_relay_ports); - *tcp_relay_ports = NULL; - } - - return; - } - - if (config_setting_is_array(ports_array) == CONFIG_FALSE) { - syslog(LOG_ERR, "'%s' setting should be an array. Array syntax: 'setting = [value1, value2, ...]'.\n", - NAME_TCP_RELAY_PORTS); - return; - } - - int config_port_count = config_setting_length(ports_array); - - if (config_port_count == 0) { - syslog(LOG_ERR, "'%s' is empty.\n", NAME_TCP_RELAY_PORTS); - return; - } - - *tcp_relay_ports = malloc(config_port_count * sizeof(uint16_t)); - - int i; - - for (i = 0; i < config_port_count; i ++) { - config_setting_t *elem = config_setting_get_elem(ports_array, i); - - if (elem == NULL) { - // it's NULL if `ports_array` is not an array (we have that check earlier) or if `i` is out of range, which should not be - syslog(LOG_WARNING, "Port #%d: Something went wrong while parsing the port. Stopping reading ports.\n", i); - break; - } - - if (config_setting_is_number(elem) == CONFIG_FALSE) { - syslog(LOG_WARNING, "Port #%d: Not a number. Skipping.\n", i); - continue; - } - - (*tcp_relay_ports)[*tcp_relay_port_count] = config_setting_get_int(elem); - - if ((*tcp_relay_ports)[*tcp_relay_port_count] < MIN_ALLOWED_PORT - || (*tcp_relay_ports)[*tcp_relay_port_count] > MAX_ALLOWED_PORT) { - syslog(LOG_WARNING, "Port #%d: Invalid port: %u, should be in [%d, %d]. Skipping.\n", i, - (*tcp_relay_ports)[*tcp_relay_port_count], MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); - continue; - } - - (*tcp_relay_port_count) ++; - } - - // the loop above skips invalid ports, so we adjust the allocated memory size - if ((*tcp_relay_port_count) > 0) { - *tcp_relay_ports = realloc(*tcp_relay_ports, (*tcp_relay_port_count) * sizeof(uint16_t)); - } else { - free(*tcp_relay_ports); - *tcp_relay_ports = NULL; - } -} - -// Gets general config options -// -// Important: you are responsible for freeing `pid_file_path` and `keys_file_path` -// also, iff `tcp_relay_ports_count` > 0, then you are responsible for freeing `tcp_relay_ports` -// and also `motd` iff `enable_motd` is set -// -// returns 1 on success -// 0 on failure, doesn't modify any data pointed by arguments - -int get_general_config(const char *cfg_file_path, char **pid_file_path, char **keys_file_path, int *port, - int *enable_ipv6, - int *enable_ipv4_fallback, int *enable_lan_discovery, int *enable_tcp_relay, uint16_t **tcp_relay_ports, - int *tcp_relay_port_count, int *enable_motd, char **motd) -{ - config_t cfg; - - const char *NAME_PORT = "port"; - const char *NAME_PID_FILE_PATH = "pid_file_path"; - const char *NAME_KEYS_FILE_PATH = "keys_file_path"; - const char *NAME_ENABLE_IPV6 = "enable_ipv6"; - const char *NAME_ENABLE_IPV4_FALLBACK = "enable_ipv4_fallback"; - const char *NAME_ENABLE_LAN_DISCOVERY = "enable_lan_discovery"; - const char *NAME_ENABLE_TCP_RELAY = "enable_tcp_relay"; - const char *NAME_ENABLE_MOTD = "enable_motd"; - const char *NAME_MOTD = "motd"; - - config_init(&cfg); - - // Read the file. If there is an error, report it and exit. - if (config_read_file(&cfg, cfg_file_path) == CONFIG_FALSE) { - syslog(LOG_ERR, "%s:%d - %s\n", config_error_file(&cfg), config_error_line(&cfg), config_error_text(&cfg)); - config_destroy(&cfg); - return 0; - } - - // Get port - if (config_lookup_int(&cfg, NAME_PORT, port) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_PORT); - syslog(LOG_WARNING, "Using default '%s': %d\n", NAME_PORT, DEFAULT_PORT); - *port = DEFAULT_PORT; - } - - // Get PID file location - const char *tmp_pid_file; - - if (config_lookup_string(&cfg, NAME_PID_FILE_PATH, &tmp_pid_file) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_PID_FILE_PATH); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_PID_FILE_PATH, DEFAULT_PID_FILE_PATH); - tmp_pid_file = DEFAULT_PID_FILE_PATH; - } - - *pid_file_path = malloc(strlen(tmp_pid_file) + 1); - strcpy(*pid_file_path, tmp_pid_file); - - // Get keys file location - const char *tmp_keys_file; - - if (config_lookup_string(&cfg, NAME_KEYS_FILE_PATH, &tmp_keys_file) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_KEYS_FILE_PATH); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_KEYS_FILE_PATH, DEFAULT_KEYS_FILE_PATH); - tmp_keys_file = DEFAULT_KEYS_FILE_PATH; - } - - *keys_file_path = malloc(strlen(tmp_keys_file) + 1); - strcpy(*keys_file_path, tmp_keys_file); - - // Get IPv6 option - if (config_lookup_bool(&cfg, NAME_ENABLE_IPV6, enable_ipv6) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_IPV6); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_IPV6, DEFAULT_ENABLE_IPV6 ? "true" : "false"); - *enable_ipv6 = DEFAULT_ENABLE_IPV6; - } - - // Get IPv4 fallback option - if (config_lookup_bool(&cfg, NAME_ENABLE_IPV4_FALLBACK, enable_ipv4_fallback) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_IPV4_FALLBACK); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_IPV4_FALLBACK, - DEFAULT_ENABLE_IPV4_FALLBACK ? "true" : "false"); - *enable_ipv4_fallback = DEFAULT_ENABLE_IPV4_FALLBACK; - } - - // Get LAN discovery option - if (config_lookup_bool(&cfg, NAME_ENABLE_LAN_DISCOVERY, enable_lan_discovery) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_LAN_DISCOVERY); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_LAN_DISCOVERY, - DEFAULT_ENABLE_LAN_DISCOVERY ? "true" : "false"); - *enable_lan_discovery = DEFAULT_ENABLE_LAN_DISCOVERY; - } - - // Get TCP relay option - if (config_lookup_bool(&cfg, NAME_ENABLE_TCP_RELAY, enable_tcp_relay) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_TCP_RELAY); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_TCP_RELAY, - DEFAULT_ENABLE_TCP_RELAY ? "true" : "false"); - *enable_tcp_relay = DEFAULT_ENABLE_TCP_RELAY; - } - - if (*enable_tcp_relay) { - parse_tcp_relay_ports_config(&cfg, tcp_relay_ports, tcp_relay_port_count); - } else { - *tcp_relay_port_count = 0; - } - - // Get MOTD option - if (config_lookup_bool(&cfg, NAME_ENABLE_MOTD, enable_motd) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_MOTD); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_ENABLE_MOTD, - DEFAULT_ENABLE_MOTD ? "true" : "false"); - *enable_motd = DEFAULT_ENABLE_MOTD; - } - - if (*enable_motd) { - // Get MOTD - const char *tmp_motd; - - if (config_lookup_string(&cfg, NAME_MOTD, &tmp_motd) == CONFIG_FALSE) { - syslog(LOG_WARNING, "No '%s' setting in configuration file.\n", NAME_MOTD); - syslog(LOG_WARNING, "Using default '%s': %s\n", NAME_MOTD, DEFAULT_MOTD); - tmp_motd = DEFAULT_MOTD; - } - - size_t tmp_motd_length = strlen(tmp_motd) + 1; - size_t motd_length = tmp_motd_length > MAX_MOTD_LENGTH ? MAX_MOTD_LENGTH : tmp_motd_length; - *motd = malloc(motd_length); - strncpy(*motd, tmp_motd, motd_length); - (*motd)[motd_length - 1] = '\0'; - } - - config_destroy(&cfg); - - syslog(LOG_INFO, "Successfully read:\n"); - syslog(LOG_INFO, "'%s': %s\n", NAME_PID_FILE_PATH, *pid_file_path); - syslog(LOG_INFO, "'%s': %s\n", NAME_KEYS_FILE_PATH, *keys_file_path); - syslog(LOG_INFO, "'%s': %d\n", NAME_PORT, *port); - syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_IPV6, *enable_ipv6 ? "true" : "false"); - syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_IPV4_FALLBACK, *enable_ipv4_fallback ? "true" : "false"); - syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_LAN_DISCOVERY, *enable_lan_discovery ? "true" : "false"); - - syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_TCP_RELAY, *enable_tcp_relay ? "true" : "false"); - - // show info about tcp ports only if tcp relay is enabled - if (*enable_tcp_relay) { - if (*tcp_relay_port_count == 0) { - syslog(LOG_ERR, "No TCP ports could be read.\n"); - } else { - syslog(LOG_INFO, "Read %d TCP ports:\n", *tcp_relay_port_count); - int i; - - for (i = 0; i < *tcp_relay_port_count; i ++) { - syslog(LOG_INFO, "Port #%d: %u\n", i, (*tcp_relay_ports)[i]); - } - } - } - - syslog(LOG_INFO, "'%s': %s\n", NAME_ENABLE_MOTD, *enable_motd ? "true" : "false"); - - if (*enable_motd) { - syslog(LOG_INFO, "'%s': %s\n", NAME_MOTD, *motd); - } - - return 1; -} - -// Bootstraps nodes listed in the config file -// -// returns 1 on success, some or no bootstrap nodes were added -// 0 on failure, a error accured while parsing config file - -int bootstrap_from_config(const char *cfg_file_path, DHT *dht, int enable_ipv6) -{ - const char *NAME_BOOTSTRAP_NODES = "bootstrap_nodes"; - - const char *NAME_PUBLIC_KEY = "public_key"; - const char *NAME_PORT = "port"; - const char *NAME_ADDRESS = "address"; - - config_t cfg; - - config_init(&cfg); - - if (config_read_file(&cfg, cfg_file_path) == CONFIG_FALSE) { - syslog(LOG_ERR, "%s:%d - %s\n", config_error_file(&cfg), config_error_line(&cfg), config_error_text(&cfg)); - config_destroy(&cfg); - return 0; - } - - config_setting_t *node_list = config_lookup(&cfg, NAME_BOOTSTRAP_NODES); - - if (node_list == NULL) { - syslog(LOG_WARNING, "No '%s' setting in the configuration file. Skipping bootstrapping.\n", NAME_BOOTSTRAP_NODES); - config_destroy(&cfg); - return 1; - } - - if (config_setting_length(node_list) == 0) { - syslog(LOG_WARNING, "No bootstrap nodes found. Skipping bootstrapping.\n"); - config_destroy(&cfg); - return 1; - } - - int bs_port; - const char *bs_address; - const char *bs_public_key; - - config_setting_t *node; - - int i = 0; - - while (config_setting_length(node_list)) { - - node = config_setting_get_elem(node_list, 0); - - if (node == NULL) { - config_destroy(&cfg); - return 0; - } - - // Check that all settings are present - if (config_setting_lookup_string(node, NAME_PUBLIC_KEY, &bs_public_key) == CONFIG_FALSE) { - syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_PUBLIC_KEY); - goto next; - } - - if (config_setting_lookup_int(node, NAME_PORT, &bs_port) == CONFIG_FALSE) { - syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_PORT); - goto next; - } - - if (config_setting_lookup_string(node, NAME_ADDRESS, &bs_address) == CONFIG_FALSE) { - syslog(LOG_WARNING, "Bootstrap node #%d: Couldn't find '%s' setting. Skipping the node.\n", i, NAME_ADDRESS); - goto next; - } - - // Process settings - if (strlen(bs_public_key) != crypto_box_PUBLICKEYBYTES * 2) { - syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %s. Skipping the node.\n", i, NAME_PUBLIC_KEY, - bs_public_key); - goto next; - } - - if (bs_port < MIN_ALLOWED_PORT || bs_port > MAX_ALLOWED_PORT) { - syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %d, should be in [%d, %d]. Skipping the node.\n", i, NAME_PORT, - bs_port, MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); - goto next; - } - - uint8_t *bs_public_key_bin = hex_string_to_bin((char *)bs_public_key); - const int address_resolved = DHT_bootstrap_from_address(dht, bs_address, enable_ipv6, htons(bs_port), - bs_public_key_bin); - free(bs_public_key_bin); - - if (!address_resolved) { - syslog(LOG_WARNING, "Bootstrap node #%d: Invalid '%s': %s. Skipping the node.\n", i, NAME_ADDRESS, bs_address); - goto next; - } - - syslog(LOG_INFO, "Successfully added bootstrap node #%d: %s:%d %s\n", i, bs_address, bs_port, bs_public_key); - -next: - // config_setting_lookup_string() allocates string inside and doesn't allow us to free it direcly - // though it's freed when the element is removed, so we free it right away in order to keep memory - // consumption minimal - config_setting_remove_elem(node_list, 0); - i++; - } - - config_destroy(&cfg); - - return 1; -} - -// Prints public key - -void print_public_key(const uint8_t *public_key) -{ - char buffer[2 * crypto_box_PUBLICKEYBYTES + 1]; - int index = 0; - - size_t i; - - for (i = 0; i < crypto_box_PUBLICKEYBYTES; i++) { - index += sprintf(buffer + index, "%02hhX", public_key[i]); - } - - syslog(LOG_INFO, "Public Key: %s\n", buffer); - - return; -} - -int main(int argc, char *argv[]) -{ - openlog(DAEMON_NAME, LOG_NOWAIT | LOG_PID, LOG_DAEMON); - - syslog(LOG_INFO, "Running \"%s\" version %lu.\n", DAEMON_NAME, DAEMON_VERSION_NUMBER); - - if (argc < 2) { - syslog(LOG_ERR, "Please specify a path to a configuration file as the first argument. Exiting.\n"); - return 1; - } - - const char *cfg_file_path = argv[1]; - char *pid_file_path, *keys_file_path; - int port; - int enable_ipv6; - int enable_ipv4_fallback; - int enable_lan_discovery; - int enable_tcp_relay; - uint16_t *tcp_relay_ports; - int tcp_relay_port_count; - int enable_motd; - char *motd; - - if (get_general_config(cfg_file_path, &pid_file_path, &keys_file_path, &port, &enable_ipv6, &enable_ipv4_fallback, - &enable_lan_discovery, &enable_tcp_relay, &tcp_relay_ports, &tcp_relay_port_count, &enable_motd, &motd)) { - syslog(LOG_INFO, "General config read successfully\n"); - } else { - syslog(LOG_ERR, "Couldn't read config file: %s. Exiting.\n", cfg_file_path); - return 1; - } - - if (port < MIN_ALLOWED_PORT || port > MAX_ALLOWED_PORT) { - syslog(LOG_ERR, "Invalid port: %d, should be in [%d, %d]. Exiting.\n", port, MIN_ALLOWED_PORT, MAX_ALLOWED_PORT); - return 1; - } - - // Check if the PID file exists - FILE *pid_file; - - if ((pid_file = fopen(pid_file_path, "r"))) { - syslog(LOG_WARNING, "Another instance of the daemon is already running, PID file %s exists.\n", pid_file_path); - fclose(pid_file); - } - - IP ip; - ip_init(&ip, enable_ipv6); - - Networking_Core *net = new_networking(ip, port); - - if (net == NULL) { - if (enable_ipv6 && enable_ipv4_fallback) { - syslog(LOG_WARNING, "Couldn't initialize IPv6 networking. Falling back to using IPv4.\n"); - enable_ipv6 = 0; - ip_init(&ip, enable_ipv6); - net = new_networking(ip, port); - - if (net == NULL) { - syslog(LOG_ERR, "Couldn't fallback to IPv4. Exiting.\n"); - return 1; - } - } else { - syslog(LOG_ERR, "Couldn't initialize networking. Exiting.\n"); - return 1; - } - } - - - DHT *dht = new_DHT(net); - - if (dht == NULL) { - syslog(LOG_ERR, "Couldn't initialize Tox DHT instance. Exiting.\n"); - return 1; - } - - Onion *onion = new_onion(dht); - Onion_Announce *onion_a = new_onion_announce(dht); - - if (!(onion && onion_a)) { - syslog(LOG_ERR, "Couldn't initialize Tox Onion. Exiting.\n"); - return 1; - } - - if (enable_motd) { - if (bootstrap_set_callbacks(dht->net, DAEMON_VERSION_NUMBER, (uint8_t *)motd, strlen(motd) + 1) == 0) { - syslog(LOG_INFO, "Set MOTD successfully.\n"); - } else { - syslog(LOG_ERR, "Couldn't set MOTD: %s. Exiting.\n", motd); - return 1; - } - - free(motd); - } - - if (manage_keys(dht, keys_file_path)) { - syslog(LOG_INFO, "Keys are managed successfully.\n"); - } else { - syslog(LOG_ERR, "Couldn't read/write: %s. Exiting.\n", keys_file_path); - return 1; - } - - TCP_Server *tcp_server = NULL; - - if (enable_tcp_relay) { - if (tcp_relay_port_count == 0) { - syslog(LOG_ERR, "No TCP relay ports read. Exiting.\n"); - return 1; - } - - tcp_server = new_TCP_server(enable_ipv6, tcp_relay_port_count, tcp_relay_ports, dht->self_secret_key, onion); - - // tcp_relay_port_count != 0 at this point - free(tcp_relay_ports); - - if (tcp_server != NULL) { - syslog(LOG_INFO, "Initialized Tox TCP server successfully.\n"); - } else { - syslog(LOG_ERR, "Couldn't initialize Tox TCP server. Exiting.\n"); - return 1; - } - } - - if (bootstrap_from_config(cfg_file_path, dht, enable_ipv6)) { - syslog(LOG_INFO, "List of bootstrap nodes read successfully.\n"); - } else { - syslog(LOG_ERR, "Couldn't read list of bootstrap nodes in %s. Exiting.\n", cfg_file_path); - return 1; - } - - print_public_key(dht->self_public_key); - - // Write the PID file - FILE *pidf = fopen(pid_file_path, "a+"); - - if (pidf == NULL) { - syslog(LOG_ERR, "Couldn't open the PID file for writing: %s. Exiting.\n", pid_file_path); - return 1; - } - - free(pid_file_path); - free(keys_file_path); - - // Fork off from the parent process - const pid_t pid = fork(); - - if (pid > 0) { - fprintf(pidf, "%d", pid); - fclose(pidf); - syslog(LOG_INFO, "Forked successfully: PID: %d.\n", pid); - return 0; - } else { - fclose(pidf); - } - - if (pid < 0) { - syslog(LOG_ERR, "Forking failed. Exiting.\n"); - return 1; - } - - // Change the file mode mask - umask(0); - - // Create a new SID for the child process - if (setsid() < 0) { - syslog(LOG_ERR, "SID creation failure. Exiting.\n"); - return 1; - } - - // Change the current working directory - if ((chdir("/")) < 0) { - syslog(LOG_ERR, "Couldn't change working directory to '/'. Exiting.\n"); - return 1; - } - - // Go quiet - close(STDOUT_FILENO); - close(STDIN_FILENO); - close(STDERR_FILENO); - - uint64_t last_LANdiscovery = 0; - const uint16_t htons_port = htons(port); - - int waiting_for_dht_connection = 1; - - if (enable_lan_discovery) { - LANdiscovery_init(dht); - syslog(LOG_INFO, "Initialized LAN discovery.\n"); - } - - while (1) { - do_DHT(dht); - - if (enable_lan_discovery && is_timeout(last_LANdiscovery, LAN_DISCOVERY_INTERVAL)) { - send_LANdiscovery(htons_port, dht); - last_LANdiscovery = unix_time(); - } - - if (enable_tcp_relay) { - do_TCP_server(tcp_server); - } - - networking_poll(dht->net); - - if (waiting_for_dht_connection && DHT_isconnected(dht)) { - syslog(LOG_INFO, "Connected to other bootstrap node successfully.\n"); - waiting_for_dht_connection = 0; - } - - sleep; - } - - return 1; -} -- cgit v1.2.3