Custom broadcasts file is more appropriate in:

Goldberg SteamEmu Saves/settings/custom_broadcasts.txt

Use C++ vector instead of C arrays.

Makefile

@@ -25,8 +25,8 @@ release: CXX_FLAGS += -DNDEBUG -DEMU_RELEASE_BUILD -Ofast
 release: LD_FLAGS += -lpthread
 release32: CXX_FLAGS += -m32
 release32: LD_FLAGS += -m32
-debug: CXX_FLAGS += -g3
+debug: CXX_FLAGS += -g3 -fsanitize=address
-debug: LD_FLAGS += -lpthread
+debug: LD_FLAGS += -lasan
 release: library
 release32: release
 debug: library

Readme_release.txt

@@ -51,8 +51,13 @@ The steam appid can also be set using the SteamAppId or SteamGameId env variable
 Offline mode:
 Some games that connect to online servers might only work if the steam emu behaves like steam is in offline mode. If you need this create a offline.txt file in the steam_settings folder.
 
+Custom Broadcast ips:
+If you want to set custom ips which the emulator will send broadcast packets to, make a list of them, one on each line in: Goldberg SteamEmu Saves\settings\custom_broadcasts.txt
+
+
 Support for CPY steam_api(64).dll cracks: See the build in the experimental folder.
 
+
 Notes:
 You must all be on the same LAN for it to work. This is an early work so a lot of games will likely not work.
 

dll/local_storage.cpp

@@ -502,6 +502,11 @@ std::string Local_Storage::get_path(std::string folder)
     return path;
 }
 
+std::string Local_Storage::get_global_settings_path()
+{
+    return save_directory + SETTINGS_STORAGE_FOLDER + PATH_SEPARATOR;
+}
+
 std::vector<std::string> Local_Storage::get_filenames_path(std::string path)
 {
     if (path.back() != *PATH_SEPARATOR) {
@@ -522,7 +527,7 @@ int Local_Storage::store_data(std::string folder, std::string file, char *data,
 
 int Local_Storage::store_data_settings(std::string file, char *data, unsigned int length)
 {
-    return store_file_data(save_directory + SETTINGS_STORAGE_FOLDER, file, data, length);
+    return store_file_data(get_global_settings_path(), file, data, length);
 }
 
 int Local_Storage::get_file_data(std::string full_path, char *data, unsigned int max_length)
@@ -554,7 +559,7 @@ int Local_Storage::get_data(std::string folder, std::string file, char *data, un
 int Local_Storage::get_data_settings(std::string file, char *data, unsigned int max_length)
 {
     file = sanitize_file_name(file);
-    std::string full_path = save_directory + SETTINGS_STORAGE_FOLDER + PATH_SEPARATOR + file;
+    std::string full_path = get_global_settings_path() + file;
     return get_file_data(full_path, data, max_length);
 }
 

dll/local_storage.h

@@ -54,6 +54,7 @@ public:
     unsigned int file_size(std::string folder, std::string file);
     bool file_delete(std::string folder, std::string file);
     uint64_t file_timestamp(std::string folder, std::string file);
+    std::string get_global_settings_path();
     std::string get_path(std::string folder);
 
     bool update_save_filenames(std::string folder);

dll/network.cpp

@@ -280,7 +280,7 @@ static int receive_packet(sock_t sock, IP_PORT *ip_port, char *data, unsigned lo
     return -1;
 }
 
-static bool send_broadcasts(sock_t sock, uint16 port, char *data, unsigned long length, uint32_t *custom_broadcasts)
+static bool send_broadcasts(sock_t sock, uint16 port, char *data, unsigned long length, std::vector<uint32_t> *custom_broadcasts)
 {
     static std::chrono::high_resolution_clock::time_point last_get_broadcast_info;
     if (number_broadcasts < 0 || check_timedout(last_get_broadcast_info, 60.0)) {
@@ -311,12 +311,11 @@ static bool send_broadcasts(sock_t sock, uint16 port, char *data, unsigned long
     PRINT_DEBUG("start custom broadcasts\n");
     IP_PORT custom_targeted_broadcast;
     custom_targeted_broadcast.port = port;
-    for(int i = 0; i < MAX_CUSTOM_BROADCASTS; i++) {
+    for(auto &ip : *custom_broadcasts) {
-        if(custom_broadcasts[i] == 0)
+        custom_targeted_broadcast.ip = ip;
-            break;
-        custom_targeted_broadcast.ip = custom_broadcasts[i];
         send_packet_to(sock, custom_targeted_broadcast, data, length);
     }
+
     PRINT_DEBUG("end custom broadcasts\n");
 
     return true;
@@ -683,7 +682,7 @@ bool Networking::handle_low_level_udp(Common_Message *msg, IP_PORT ip_port)
 
 #define NUM_TCP_WAITING 128
 
-Networking::Networking(CSteamID id, uint32 appid, uint16 port, uint32_t *custom_broadcasts)
+Networking::Networking(CSteamID id, uint32 appid, uint16 port, std::vector<uint32_t> *custom_broadcasts)
 {
     run_at_startup();
     tcp_port = udp_port = port;
@@ -691,8 +690,8 @@ Networking::Networking(CSteamID id, uint32 appid, uint16 port, uint32_t *custom_
     alive = true;
     last_run = std::chrono::high_resolution_clock::now();
     this->appid = appid;
-    for(int i = 0; i < MAX_CUSTOM_BROADCASTS; i++)
+    if (custom_broadcasts)
-        this->custom_broadcasts[i] = custom_broadcasts[i];
+        this->custom_broadcasts = *custom_broadcasts;
 
     sock_t sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
     PRINT_DEBUG("UDP socket: %u\n", sock);
@@ -802,9 +801,9 @@ void Networking::send_announce_broadcasts()
     size_t size = msg.ByteSizeLong(); 
     char *buffer = new char[size];
     msg.SerializeToArray(buffer, size);
-    send_broadcasts(udp_socket, htons(DEFAULT_PORT), buffer, size, this->custom_broadcasts);
+    send_broadcasts(udp_socket, htons(DEFAULT_PORT), buffer, size, &this->custom_broadcasts);
     if (udp_port != DEFAULT_PORT) {
-        send_broadcasts(udp_socket, htons(udp_port), buffer, size, this->custom_broadcasts);
+        send_broadcasts(udp_socket, htons(udp_port), buffer, size, &this->custom_broadcasts);
     }
 
     delete[] buffer;

dll/network.h

@@ -20,8 +20,6 @@
 #ifndef NETWORK_INCLUDE
 #define NETWORK_INCLUDE
 
-#define MAX_CUSTOM_BROADCASTS 128
-
 #include "net.pb.h"
 #include <chrono>
 
@@ -108,7 +106,7 @@ class Networking {
     std::vector<CSteamID> ids;
     uint32 appid;
     std::chrono::high_resolution_clock::time_point last_broadcast;
-    uint32_t custom_broadcasts[MAX_CUSTOM_BROADCASTS];
+    std::vector<uint32_t> custom_broadcasts;
 
     std::vector<struct TCP_Socket> accepted;
     std::recursive_mutex mutex;
@@ -123,7 +121,7 @@ class Networking {
 
     Common_Message create_announce(bool request);
 public:
-    Networking(CSteamID id, uint32 appid, uint16 port, uint32_t *custom_broadcasts);
+    Networking(CSteamID id, uint32 appid, uint16 port, std::vector<uint32_t> *custom_broadcasts);
     void addListenId(CSteamID id);
     void setAppID(uint32 appid);
     void Run();

dll/steam_client.cpp

@@ -19,7 +19,6 @@
 
 #include <fstream>
 
-
 static void network_thread(Networking *network)
 {
     PRINT_DEBUG("network thread starting\n");
@@ -125,17 +124,14 @@ Steam_Client::Steam_Client()
     }
 
     // Custom broadcasts
-
+    std::vector<uint32_t> custom_broadcasts;
-    uint32_t custom_broadcasts[MAX_CUSTOM_BROADCASTS] = {0};
+    std::string broadcasts_filepath = local_storage->get_global_settings_path() + "custom_broadcasts.txt";
-    int readIP = 0;
-
-    std::string broadcasts_filepath = Local_Storage::get_game_settings_path() + "custom_broadcasts.txt";
 
     std::ifstream broadcasts_file(broadcasts_filepath);
     PRINT_DEBUG("Broadcasts file path: %s\n", broadcasts_filepath.c_str());
     if (broadcasts_file.is_open()) {
         std::string line;
-        while (std::getline(broadcasts_file, line) && readIP < MAX_CUSTOM_BROADCASTS) {
+        while (std::getline(broadcasts_file, line)) {
             int offset = 0;
             size_t pos = 0;
             std::string tok;
@@ -160,7 +156,7 @@ Steam_Client::Steam_Client()
                 try
                 {
                     current_ip += (std::stoi(line) << offset);
-                    custom_broadcasts[readIP++] = current_ip;
+                    custom_broadcasts.push_back(current_ip);
                 }
                 catch(std::invalid_argument ex)
                 {
@@ -169,7 +165,6 @@ Steam_Client::Steam_Client()
             }
         }
     }
-    
 
     // Acount name
     char name[32] = {};
@@ -286,7 +281,7 @@ Steam_Client::Steam_Client()
         }
     }
 
-    network = new Networking(settings_server->get_local_steam_id(), appid, port, custom_broadcasts);
+    network = new Networking(settings_server->get_local_steam_id(), appid, port, &custom_broadcasts);
 
     callback_results_client = new SteamCallResults();
     callback_results_server = new SteamCallResults();
@@ -294,7 +289,7 @@ Steam_Client::Steam_Client()
     callbacks_server = new SteamCallBacks(callback_results_server);
     run_every_runcb = new RunEveryRunCB();
 
-    PRINT_DEBUG("steam client init: id: %llu server id: %llu appid: %u port: %u custom broadcasts: %u\n", user_id.ConvertToUint64(), settings_server->get_local_steam_id().ConvertToUint64(), appid, port, sizeof(custom_broadcasts));
+    PRINT_DEBUG("steam client init: id: %llu server id: %llu appid: %u port: %u \n", user_id.ConvertToUint64(), settings_server->get_local_steam_id().ConvertToUint64(), appid, port);
 
     steam_user = new Steam_User(settings_client, local_storage, network, callback_results_client, callbacks_client);
     steam_friends = new Steam_Friends(settings_client, network, callback_results_client, callbacks_client, run_every_runcb);