Made sockets platform-independent, supporting Linux

Makefile

@@ -286,7 +286,7 @@ LEVEL_DIRS := $(patsubst levels/%,%,$(dir $(wildcard levels/*/header.h)))
 # Directories containing source files
 
 # Hi, I'm a PC
-SRC_DIRS := src src/engine src/game src/audio src/menu src/buffers actors levels bin data assets src/pc src/pc/gfx src/pc/audio src/pc/controller src/pc/fs src/pc/fs/packtypes src/pc/network src/pc/network/packets
+SRC_DIRS := src src/engine src/game src/audio src/menu src/buffers actors levels bin data assets src/pc src/pc/gfx src/pc/audio src/pc/controller src/pc/fs src/pc/fs/packtypes src/pc/network src/pc/network/packets src/pc/network/socket
 ASM_DIRS :=
 
 ifeq ($(DISCORDRPC),1)
@@ -526,9 +526,8 @@ ifeq ($(SDL_USED),2)
 endif
 
 ifeq ($(WINDOWS_BUILD),1)
-  CC_CHECK := $(CC) -fsyntax-only -fsigned-char $(BACKEND_CFLAGS) $(INCLUDE_CFLAGS) -Wall -Wextra -Wno-format-security $(VERSION_CFLAGS) $(GRUCODE_CFLAGS)
-  CFLAGS := $(OPT_FLAGS) $(INCLUDE_CFLAGS) $(BACKEND_CFLAGS) $(VERSION_CFLAGS) $(GRUCODE_CFLAGS) -fno-strict-aliasing -fwrapv
-
+  CC_CHECK := $(CC) -fsyntax-only -fsigned-char $(BACKEND_CFLAGS) $(INCLUDE_CFLAGS) -Wall -Wextra -Wno-format-security $(VERSION_CFLAGS) $(GRUCODE_CFLAGS) -DWINSOCK
+  CFLAGS := $(OPT_FLAGS) $(INCLUDE_CFLAGS) $(BACKEND_CFLAGS) $(VERSION_CFLAGS) $(GRUCODE_CFLAGS) -fno-strict-aliasing -fwrapv -DWINSOCK
 else ifeq ($(TARGET_WEB),1)
   CC_CHECK := $(CC) -fsyntax-only -fsigned-char $(BACKEND_CFLAGS) $(INCLUDE_CFLAGS) -Wall -Wextra -Wno-format-security $(VERSION_CFLAGS) $(GRUCODE_CFLAGS) -s USE_SDL=2
   CFLAGS := $(OPT_FLAGS) $(INCLUDE_CFLAGS) $(BACKEND_CFLAGS) $(VERSION_CFLAGS) $(GRUCODE_CFLAGS) -fno-strict-aliasing -fwrapv -s USE_SDL=2

network.sh

@@ -1,5 +1,17 @@
 set -e
 make BETTERCAMERA=1 NODRAWINGDISTANCE=1 DEBUG=1 IMMEDIATELOAD=1
-./build/us_pc/sm64.us.f3dex2e.exe --server --configfile sm64config_server.txt  &
-#./build/us_pc/sm64.us.f3dex2e.exe --client --configfile sm64config_client.txt  &
-winpty cgdb ./build/us_pc/sm64.us.f3dex2e.exe -ex 'break debug_breakpoint_here' -ex 'run --client --configfile sm64config_client.txt' -ex 'quit'
+
+# find file
+FILE=./build/us_pc/sm64.us.f3dex2e.exe
+if [ ! -f "$FILE" ]; then
+    FILE=./build/us_pc/sm64.us.f3dex2e
+fi
+
+$FILE --server --configfile sm64config_server.txt  &
+
+# debug if cgdb exists
+if ! [ -x "$(command -v cgdb)" ]; then
+    $FILE --client --configfile sm64config_client.txt  &
+else
+    winpty cgdb $FILE -ex 'break debug_breakpoint_here' -ex 'run --client --configfile sm64config_client.txt' -ex 'quit'
+fi

src/game/ingame_menu.c

@@ -2765,7 +2765,10 @@ s16 render_sync_level_screen(void) {
     u8 colorFade = sins(gDialogColorFadeTimer) * 50.0f + 200.0f;
     gSPDisplayList(gDisplayListHead++, dl_rgba16_text_begin);
     gDPSetEnvColor(gDisplayListHead++, colorFade, colorFade, colorFade, 255);
+
+    #define TEXT_SYNCHRONIZING 0x1C,0x22,0x17,0x0C,0x11,0x1B,0x18,0x17,0x12,0x02,0x12,0x17,0x10,0xFF
     u8 synchronizing[] = { TEXT_SYNCHRONIZING };
+
     print_hud_lut_string(HUD_LUT_GLOBAL, 80, 200, synchronizing);
     gSPDisplayList(gDisplayListHead++, dl_rgba16_text_end);
 

src/menu/star_select.c

@@ -263,7 +263,10 @@ void print_act_selector_strings(void) {
         u8 colorFade = sin(fadeTimer++ * 0.2f) * 50.0f + 200.0f;
         gSPDisplayList(gDisplayListHead++, dl_rgba16_text_begin);
         gDPSetEnvColor(gDisplayListHead++, colorFade, colorFade, colorFade, 255);
+
+        #define TEXT_SYNCHRONIZING 0x1C,0x22,0x17,0x0C,0x11,0x1B,0x18,0x17,0x12,0x02,0x12,0x17,0x10,0xFF
         u8 synchronizing[] = { TEXT_SYNCHRONIZING };
+
         print_hud_lut_string(HUD_LUT_GLOBAL, 80, 8, synchronizing);
         gSPDisplayList(gDisplayListHead++, dl_rgba16_text_end);
     }

src/pc/network/network.c

@@ -2,15 +2,7 @@
 #include "network.h"
 #include "object_fields.h"
 #include "object_constants.h"
-
-// Winsock includes
-#include <winsock2.h>
-#include <Ws2tcpip.h>
-//#pragma comment(lib, "Ws2_32.lib")
-
-//////////////////////////
-// TODO: port to linux! //
-//////////////////////////
+#include "socket/socket.h"
 
 enum NetworkType networkType;
 SOCKET gSocket;
@@ -20,62 +12,34 @@ void network_init(enum NetworkType inNetworkType) {
     networkType = inNetworkType;
     if (networkType == NT_NONE) { return; }
 
-    //-----------------------------------------------
-    // Initialize Winsock
-    WSADATA wsaData;
-    int rc = WSAStartup(MAKEWORD(2, 2), &wsaData);
-    if (rc != NO_ERROR) {
-        wprintf(L"%s WSAStartup failed with error %d\n", NETWORKTYPESTR, rc);
-        return;
-    }
-    //-----------------------------------------------
     // Create a receiver socket to receive datagrams
-    gSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
-    if (gSocket == INVALID_SOCKET) {
-        wprintf(L"%s socket failed with error %d\n", NETWORKTYPESTR, WSAGetLastError());
-        return;
-    }
-
-    // Set non-blocking mode
-    u_long iMode = 1;
-    rc = ioctlsocket(gSocket, FIONBIO, &iMode);
-    if (rc != NO_ERROR) {
-        printf("%s ioctlsocket failed with error: %ld\n", NETWORKTYPESTR, rc);
-    }
+    gSocket = socket_initialize();
+    if (gSocket == INVALID_SOCKET) { return; }
 
     // Bind the socket to any address and the specified port.
-    struct sockaddr_in rxAddr;
-    rxAddr.sin_family = AF_INET;
-    rxAddr.sin_port = htons(networkType == NT_SERVER ? 27015 : 27016);
-    rxAddr.sin_addr.s_addr = htonl(INADDR_ANY);
-    rc = bind(gSocket, (SOCKADDR *)& rxAddr, sizeof(rxAddr));
-    if (rc != 0) {
-        wprintf(L"%s bind failed with error %d\n", NETWORKTYPESTR, WSAGetLastError());
-        return;
-    }
+    unsigned int port = (networkType == NT_SERVER) ? 27015 : 27016;
+    int rc = socket_bind(gSocket, port);
+    if (rc != NO_ERROR) { return; }
 
     // Save the port to send to
-    txPort = htons(networkType == NT_SERVER ? 27016 : 27015);
+    txPort = (networkType == NT_SERVER) ? 27016 : 27015;
 }
 
 void network_send(struct Packet* p) {
+    // sanity checks
     if (networkType == NT_NONE) { return; }
     if (p->error) { printf("%s packet error!\n", NETWORKTYPESTR); return; }
-    struct sockaddr_in txAddr;
-    txAddr.sin_family = AF_INET;
-    txAddr.sin_port = txPort;
-    txAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
 
+    // remember reliable packets
     network_remember_reliable(p);
 
+    // save inside packet buffer
     u32 hash = packet_hash(p);
     memcpy(&p->buffer[p->dataLength], &hash, sizeof(u32));
-    int rc = sendto(gSocket, p->buffer, p->cursor + sizeof(u32), 0, (SOCKADDR *)& txAddr, sizeof(txAddr));
-    if (rc == SOCKET_ERROR) {
-        wprintf(L"%s sendto failed with error: %d\n", NETWORKTYPESTR, WSAGetLastError());
-        return;
-    }
 
+    // send
+    int rc = socket_send(gSocket, "127.0.0.1", txPort, p->buffer, p->cursor + sizeof(u32));
+    if (rc != NO_ERROR) { return; }
     p->sent = true;
 }
 
@@ -93,24 +57,19 @@ void network_update(void) {
     }
 
     do {
-        struct sockaddr_in rxAddr;
-        int rxAddrSize = sizeof(rxAddr);
+        // receive packet
         struct Packet p = { .cursor = 3 };
-        int rc = recvfrom(gSocket, p.buffer, PACKET_LENGTH, 0, (SOCKADDR *)&rxAddr, &rxAddrSize);
-        if (rc == SOCKET_ERROR) {
-            int error = WSAGetLastError();
-            if (error != WSAEWOULDBLOCK && error != WSAECONNRESET) {
-                wprintf(L"%s recvfrom failed with error %d\n", NETWORKTYPESTR, WSAGetLastError());
-            }
-            break;
-        }
-        if (rc == 0) { break; }
+        int rc = socket_receive(gSocket, p.buffer, PACKET_LENGTH, &p.dataLength);
+        if (rc != NO_ERROR) { break; }
 
-        p.dataLength = rc - sizeof(u32);
+        // subtract and check hash
+        p.dataLength -= sizeof(u32);
         if (!packet_check_hash(&p)) {
             printf("Invalid packet!\n");
+            continue;
         }
 
+        // execute packet
         switch (p.buffer[0]) {
             case PACKET_ACK: network_receive_ack(&p); break;
             case PACKET_PLAYER: network_receive_player(&p); break;
@@ -134,9 +93,5 @@ void network_update(void) {
 
 void network_shutdown(void) {
     if (networkType == NT_NONE) { return; }
-    int rc = closesocket(gSocket);
-    if (rc == SOCKET_ERROR) {
-        wprintf(L"%s closesocket failed with error %d\n", NETWORKTYPESTR, WSAGetLastError());
-    }
-    WSACleanup();
+    socket_close(gSocket);
 }

src/pc/network/packets/packet_object.c

@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <limits.h>
 #include "../network.h"
 #include "object_fields.h"
 #include "object_constants.h"

src/pc/network/socket/socket.c

@@ -0,0 +1,49 @@
+#include "socket.h"
+#include "../network.h"
+
+int socket_bind(SOCKET sock, unsigned int port) {
+    struct sockaddr_in rxAddr;
+    rxAddr.sin_family = AF_INET;
+    rxAddr.sin_port = htons(port);
+    rxAddr.sin_addr.s_addr = htonl(INADDR_ANY);
+
+    int rc = bind(sock, (SOCKADDR*)&rxAddr, sizeof(rxAddr));
+    if (rc != 0) {
+        printf("%s bind failed with error %d\n", NETWORKTYPESTR, SOCKET_LAST_ERROR);
+    }
+
+    return rc;
+}
+
+int socket_send(SOCKET sock, char* ip, unsigned int port, char* buffer, int bufferLength) {
+    struct sockaddr_in txAddr;
+    txAddr.sin_family = AF_INET;
+    txAddr.sin_port = htons(port);
+    txAddr.sin_addr.s_addr = inet_addr(ip);
+
+    int rc = sendto(sock, buffer, bufferLength, 0, (SOCKADDR*)&txAddr, sizeof(txAddr));
+    if (rc == SOCKET_ERROR) {
+        printf("%s sendto failed with error: %d\n", NETWORKTYPESTR, SOCKET_LAST_ERROR);
+    }
+
+    return rc;
+}
+
+int socket_receive(SOCKET sock, char* buffer, int bufferLength, int* receiveLength) {
+    *receiveLength = 0;
+
+    struct sockaddr_in rxAddr;
+    int rxAddrSize = sizeof(rxAddr);
+
+    int rc = recvfrom(sock, buffer, bufferLength, 0, (SOCKADDR*)&rxAddr, &rxAddrSize);
+    if (rc == SOCKET_ERROR) {
+        int error = SOCKET_LAST_ERROR;
+        if (error != EWOULDBLOCK && error != ECONNRESET) {
+            printf("%s recvfrom failed with error %d\n", NETWORKTYPESTR, SOCKET_LAST_ERROR);
+        }
+        return rc;
+    }
+
+    *receiveLength = rc;
+    return NO_ERROR;
+}

src/pc/network/socket/socket.h

@@ -0,0 +1,16 @@
+#ifndef SOCKET_H
+#define SOCKET_H
+
+#ifdef WINSOCK
+#include "socket_windows.h"
+#else
+#include "socket_linux.h"
+#endif
+
+SOCKET socket_initialize(void);
+int socket_bind(SOCKET sock, unsigned int port);
+int socket_send(SOCKET sock, char* ip, unsigned int port, char* buffer, int bufferLength);
+int socket_receive(SOCKET sock, char* buffer, int bufferLength, int* receiveLength);
+void socket_close(SOCKET sock);
+
+#endif

src/pc/network/socket/socket_linux.c

@@ -0,0 +1,30 @@
+#ifndef WINSOCK
+#include "socket_linux.h"
+#include "../network.h"
+
+SOCKET socket_initialize(void) {
+    // initialize socket
+    SOCKET sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    if (sock == INVALID_SOCKET) {
+        printf("%s socket failed with error %d\n", NETWORKTYPESTR, SOCKET_LAST_ERROR);
+        return INVALID_SOCKET;
+    }
+
+    // set non-blocking mode
+    int rc = fcntl(sock, F_SETFL, fcntl(sock, F_GETFL, 0) | O_NONBLOCK);
+    if (rc == INVALID_SOCKET) {
+        printf("%s fcntl failed with error: %d\n", NETWORKTYPESTR, rc);
+        return INVALID_SOCKET;
+    }
+
+    return sock;
+}
+
+void socket_close(SOCKET sock) {
+    int rc = closesocket(sock);
+    if (rc == SOCKET_ERROR) {
+        printf("%s closesocket failed with error %d\n", NETWORKTYPESTR, SOCKET_LAST_ERROR);
+    }
+}
+
+#endif

src/pc/network/socket/socket_linux.h

@@ -0,0 +1,18 @@
+#ifndef SOCKET_LINUX_H
+#define SOCKET_LINUX_H
+
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <fcntl.h>
+
+#define SOCKET unsigned int
+#define INVALID_SOCKET (unsigned int)(-1)
+#define SOCKET_LAST_ERROR errno
+#define NO_ERROR (0)
+#define SOCKADDR struct sockaddr
+#define SOCKET_ERROR (-1)
+#define closesocket(fd) close(fd)
+
+#endif

src/pc/network/socket/socket_windows.c

@@ -0,0 +1,40 @@
+#ifdef WINSOCK
+#include "socket_windows.h"
+#include "../network.h"
+
+SOCKET socket_initialize(void) {
+    // start up winsock
+    WSADATA wsaData;
+    int rc = WSAStartup(MAKEWORD(2, 2), &wsaData);
+    if (rc != NO_ERROR) {
+        printf("%s WSAStartup failed with error %d\n", NETWORKTYPESTR, rc);
+        return INVALID_SOCKET;
+    }
+
+    // initialize socket
+    SOCKET sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    if (sock == INVALID_SOCKET) {
+        printf("%s socket failed with error %d\n", NETWORKTYPESTR, SOCKET_LAST_ERROR);
+        return INVALID_SOCKET;
+    }
+
+    // set non-blocking mode
+    u_long iMode = 1;
+    rc = ioctlsocket(sock, FIONBIO, &iMode);
+    if (rc != NO_ERROR) {
+        printf("%s ioctlsocket failed with error: %d\n", NETWORKTYPESTR, rc);
+        return INVALID_SOCKET;
+    }
+
+    return sock;
+}
+
+void socket_close(SOCKET sock) {
+    int rc = closesocket(sock);
+    if (rc == SOCKET_ERROR) {
+        printf("%s closesocket failed with error %d\n", NETWORKTYPESTR, SOCKET_LAST_ERROR);
+    }
+    WSACleanup();
+}
+
+#endif

src/pc/network/socket/socket_windows.h

@@ -0,0 +1,11 @@
+#ifndef SOCKET_WINDOWS_H
+#define SOCKET_WINDOWS_H
+
+#include <winsock2.h>
+#include <Ws2tcpip.h>
+
+#define SOCKET_LAST_ERROR WSAGetLastError()
+#define EWOULDBLOCK WSAEWOULDBLOCK
+#define ECONNRESET WSAECONNRESET
+
+#endif