refactor: Make tox-bootstrapd use bool instead of int

A continuation of the cleanup done in
b7404f2.

tox-bootrstrapd historically had used ints for boolean values, as it was
initially written in C89 which has no stdbool.h. Since then it has
modernized and moved on to using C11, but the usage of the int type to
represent boolean values, "boolean ints", remained. Recently, driven by
a desire to eliminate implicit int-to-bool conversion, @iphydf did a
cleanup in b7404f2, changing some of
the boolean ints to bools and doing manual int-to-bool conversion on the
remaining boolean ints. This left the codebase in an inconsistent state
of both ints and bools now being used to represent boolean values, not
to mention that the explicit int-to-bool conversions are a bit ugly. The
only boolean ints that remained are those stemming from libconfig's
config_lookup_bool() taking an *int parameter to return a boolean value,
as libconfig still uses C89. This commit adds a wrapper function around
libconfig's config_lookup_bool() that takes a *bool instead, eliminating
the remaining boolean ints and majority of the explicit int-to-bool
conversions in tox-bootstrapd.

other/bootstrap_daemon/src/config.c

@@ -138,9 +138,20 @@ static void parse_tcp_relay_ports_config(config_t *cfg, uint16_t **tcp_relay_por
     }
 }
 
+// A wrapper function that actually takes a bool argument
+static int tox_config_lookup_bool(const config_t *config, const char *path, bool *bool_value)
+{
+    int int_value = 0;
+    if (config_lookup_bool(config, path, &int_value) == CONFIG_FALSE) {
+        return CONFIG_FALSE;
+    }
+    *bool_value = int_value != 0;
+    return CONFIG_TRUE;
+}
+
 bool 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)
+                        bool *enable_ipv6, bool *enable_ipv4_fallback, bool *enable_lan_discovery, bool *enable_tcp_relay,
+                        uint16_t **tcp_relay_ports, int *tcp_relay_port_count, bool *enable_motd, char **motd)
 {
     config_t cfg;
 
@@ -205,51 +216,51 @@ bool get_general_config(const char *cfg_file_path, char **pid_file_path, char **
     memcpy(*keys_file_path, tmp_keys_file, keys_file_path_len);
 
     // Get IPv6 option
-    if (config_lookup_bool(&cfg, NAME_ENABLE_IPV6, enable_ipv6) == CONFIG_FALSE) {
+    if (tox_config_lookup_bool(&cfg, NAME_ENABLE_IPV6, enable_ipv6) == CONFIG_FALSE) {
         log_write(LOG_LEVEL_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_IPV6);
         log_write(LOG_LEVEL_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) {
+    if (tox_config_lookup_bool(&cfg, NAME_ENABLE_IPV4_FALLBACK, enable_ipv4_fallback) == CONFIG_FALSE) {
         log_write(LOG_LEVEL_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_IPV4_FALLBACK);
         log_write(LOG_LEVEL_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) {
+    if (tox_config_lookup_bool(&cfg, NAME_ENABLE_LAN_DISCOVERY, enable_lan_discovery) == CONFIG_FALSE) {
         log_write(LOG_LEVEL_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_LAN_DISCOVERY);
         log_write(LOG_LEVEL_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) {
+    if (tox_config_lookup_bool(&cfg, NAME_ENABLE_TCP_RELAY, enable_tcp_relay) == CONFIG_FALSE) {
         log_write(LOG_LEVEL_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_TCP_RELAY);
         log_write(LOG_LEVEL_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 != 0) {
+    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) {
+    if (tox_config_lookup_bool(&cfg, NAME_ENABLE_MOTD, enable_motd) == CONFIG_FALSE) {
         log_write(LOG_LEVEL_WARNING, "No '%s' setting in configuration file.\n", NAME_ENABLE_MOTD);
         log_write(LOG_LEVEL_WARNING, "Using default '%s': %s\n", NAME_ENABLE_MOTD,
                   DEFAULT_ENABLE_MOTD ? "true" : "false");
         *enable_motd = DEFAULT_ENABLE_MOTD;
     }
 
-    if (*enable_motd != 0) {
+    if (*enable_motd) {
         // Get MOTD
         const char *tmp_motd;
 
@@ -271,14 +282,14 @@ bool get_general_config(const char *cfg_file_path, char **pid_file_path, char **
     log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_PID_FILE_PATH,        *pid_file_path);
     log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_KEYS_FILE_PATH,       *keys_file_path);
     log_write(LOG_LEVEL_INFO, "'%s': %d\n", NAME_PORT,                 *port);
-    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_IPV6,          *enable_ipv6          != 0 ? "true" : "false");
-    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_IPV4_FALLBACK, *enable_ipv4_fallback != 0 ? "true" : "false");
-    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_LAN_DISCOVERY, *enable_lan_discovery != 0 ? "true" : "false");
+    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_IPV6,          *enable_ipv6          ? "true" : "false");
+    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_IPV4_FALLBACK, *enable_ipv4_fallback ? "true" : "false");
+    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_LAN_DISCOVERY, *enable_lan_discovery ? "true" : "false");
 
-    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_TCP_RELAY,     *enable_tcp_relay     != 0 ? "true" : "false");
+    log_write(LOG_LEVEL_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 != 0) {
+    if (*enable_tcp_relay) {
         if (*tcp_relay_port_count == 0) {
             log_write(LOG_LEVEL_ERROR, "No TCP ports could be read.\n");
         } else {
@@ -290,9 +301,9 @@ bool get_general_config(const char *cfg_file_path, char **pid_file_path, char **
         }
     }
 
-    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_MOTD,          *enable_motd          != 0 ? "true" : "false");
+    log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_ENABLE_MOTD,          *enable_motd          ? "true" : "false");
 
-    if (*enable_motd != 0) {
+    if (*enable_motd) {
         log_write(LOG_LEVEL_INFO, "'%s': %s\n", NAME_MOTD, *motd);
     }
 

other/bootstrap_daemon/src/config.h

@@ -17,14 +17,14 @@
  *
  * 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.
+ *            and also `motd` iff `enable_motd` is true.
  *
  * @return true on success,
  *         false on failure, doesn't modify any data pointed by arguments.
  */
 bool 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);
+                        bool *enable_ipv6, bool *enable_ipv4_fallback, bool *enable_lan_discovery, bool *enable_tcp_relay,
+                        uint16_t **tcp_relay_ports, int *tcp_relay_port_count, bool *enable_motd, char **motd);
 
 /**
  * Bootstraps off nodes listed in the config file.

other/bootstrap_daemon/src/config_defaults.h

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-3.0-or-later
- * Copyright © 2016-2023 The TokTok team.
+ * Copyright © 2016-2024 The TokTok team.
  * Copyright © 2014-2016 Tox project.
  */
 
@@ -10,17 +10,19 @@
 #ifndef C_TOXCORE_OTHER_BOOTSTRAP_DAEMON_SRC_CONFIG_DEFAULTS_H
 #define C_TOXCORE_OTHER_BOOTSTRAP_DAEMON_SRC_CONFIG_DEFAULTS_H
 
+#include <stdbool.h>
+
 #include "global.h"
 
 #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_ENABLE_IPV6           true
+#define DEFAULT_ENABLE_IPV4_FALLBACK  true
+#define DEFAULT_ENABLE_LAN_DISCOVERY  true
+#define DEFAULT_ENABLE_TCP_RELAY      true
 #define DEFAULT_TCP_RELAY_PORTS       443, 3389, 33445 // comma-separated list of ports
-#define DEFAULT_ENABLE_MOTD           1 // 1 - true, 0 - false
+#define DEFAULT_ENABLE_MOTD           true
 #define DEFAULT_MOTD                  DAEMON_NAME
 
 #endif // C_TOXCORE_OTHER_BOOTSTRAP_DAEMON_SRC_CONFIG_DEFAULTS_H

other/bootstrap_daemon/src/tox-bootstrapd.c

@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-3.0-or-later
- * Copyright © 2016-2018 The TokTok team.
+ * Copyright © 2016-2024 The TokTok team.
  * Copyright © 2014-2016 Tox project.
  */
 
@@ -240,13 +240,13 @@ int main(int argc, char *argv[])
     char *pid_file_path = nullptr;
     char *keys_file_path = nullptr;
     int start_port = 0;
-    int enable_ipv6 = 0;
-    int enable_ipv4_fallback = 0;
-    int enable_lan_discovery = 0;
-    int enable_tcp_relay = 0;
+    bool enable_ipv6 = false;
+    bool enable_ipv4_fallback = false;
+    bool enable_lan_discovery = false;
+    bool enable_tcp_relay = false;
     uint16_t *tcp_relay_ports = nullptr;
     int tcp_relay_port_count = 0;
-    int enable_motd = 0;
+    bool enable_motd = false;
     char *motd = nullptr;
 
     if (get_general_config(cfg_file_path, &pid_file_path, &keys_file_path, &start_port, &enable_ipv6, &enable_ipv4_fallback,
@@ -281,7 +281,7 @@ int main(int argc, char *argv[])
     free(pid_file_path);
 
     IP ip;
-    ip_init(&ip, enable_ipv6 != 0);
+    ip_init(&ip, enable_ipv6);
 
     Logger *logger = logger_new();
 
@@ -296,10 +296,10 @@ int main(int argc, char *argv[])
     Networking_Core *net = new_networking_ex(logger, mem, ns, &ip, start_port, end_port, nullptr);
 
     if (net == nullptr) {
-        if (enable_ipv6 != 0 && enable_ipv4_fallback != 0) {
+        if (enable_ipv6 && enable_ipv4_fallback) {
             log_write(LOG_LEVEL_WARNING, "Couldn't initialize IPv6 networking. Falling back to using IPv4.\n");
-            enable_ipv6 = 0;
-            ip_init(&ip, enable_ipv6 != 0);
+            enable_ipv6 = false;
+            ip_init(&ip, enable_ipv6);
             net = new_networking_ex(logger, mem, ns, &ip, start_port, end_port, nullptr);
 
             if (net == nullptr) {
@@ -334,7 +334,7 @@ int main(int argc, char *argv[])
 
     mono_time_update(mono_time);
 
-    DHT *const dht = new_dht(logger, mem, rng, ns, mono_time, net, true, enable_lan_discovery != 0);
+    DHT *const dht = new_dht(logger, mem, rng, ns, mono_time, net, true, enable_lan_discovery);
 
     if (dht == nullptr) {
         log_write(LOG_LEVEL_ERROR, "Couldn't initialize Tox DHT instance. Exiting.\n");
@@ -429,7 +429,7 @@ int main(int argc, char *argv[])
 
     gca_onion_init(group_announce, onion_a);
 
-    if (enable_motd != 0) {
+    if (enable_motd) {
         if (bootstrap_set_callbacks(dht_get_net(dht), DAEMON_VERSION_NUMBER, (uint8_t *)motd, strlen(motd) + 1) == 0) {
             log_write(LOG_LEVEL_INFO, "Set MOTD successfully.\n");
             free(motd);
@@ -472,7 +472,7 @@ int main(int argc, char *argv[])
 
     TCP_Server *tcp_server = nullptr;
 
-    if (enable_tcp_relay != 0) {
+    if (enable_tcp_relay) {
         if (tcp_relay_port_count == 0) {
             log_write(LOG_LEVEL_ERROR, "No TCP relay ports read. Exiting.\n");
             kill_onion_announce(onion_a);
@@ -488,7 +488,7 @@ int main(int argc, char *argv[])
             return 1;
         }
 
-        tcp_server = new_tcp_server(logger, mem, rng, ns, enable_ipv6 != 0,
+        tcp_server = new_tcp_server(logger, mem, rng, ns, enable_ipv6,
                                     tcp_relay_port_count, tcp_relay_ports,
                                     dht_get_self_secret_key(dht), onion, forwarding);
 
@@ -535,7 +535,7 @@ int main(int argc, char *argv[])
         }
     }
 
-    if (bootstrap_from_config(cfg_file_path, dht, enable_ipv6 != 0)) {
+    if (bootstrap_from_config(cfg_file_path, dht, enable_ipv6)) {
         log_write(LOG_LEVEL_INFO, "List of bootstrap nodes read successfully.\n");
     } else {
         log_write(LOG_LEVEL_ERROR, "Couldn't read list of bootstrap nodes in %s. Exiting.\n", cfg_file_path);
@@ -561,7 +561,7 @@ int main(int argc, char *argv[])
 
     Broadcast_Info *broadcast = nullptr;
 
-    if (enable_lan_discovery != 0) {
+    if (enable_lan_discovery) {
         broadcast = lan_discovery_init(ns);
         log_write(LOG_LEVEL_INFO, "Initialized LAN discovery successfully.\n");
     }
@@ -589,12 +589,12 @@ int main(int argc, char *argv[])
 
         do_dht(dht);
 
-        if (enable_lan_discovery != 0 && mono_time_is_timeout(mono_time, last_lan_discovery, LAN_DISCOVERY_INTERVAL)) {
+        if (enable_lan_discovery && mono_time_is_timeout(mono_time, last_lan_discovery, LAN_DISCOVERY_INTERVAL)) {
             lan_discovery_send(dht_get_net(dht), broadcast, dht_get_self_public_key(dht), net_htons_port);
             last_lan_discovery = mono_time_get(mono_time);
         }
 
-        if (enable_tcp_relay != 0) {
+        if (enable_tcp_relay) {
             do_tcp_server(tcp_server, mono_time);
         }