wip netcode

engine/CMakeLists.txt

@@ -22,7 +22,7 @@ include_directories(external/jar)
 include_directories(external/miniaudio)
 include_directories(external/dr_libs)
 
-file(GLOB GearSrc_SRC src/*.c src/gl/*.c src/sound/*.c src/external/*.c)
+file(GLOB GearSrc_SRC src/*.c src/gl/*.c src/sound/*.c src/net/*.c src/external/*.c)
 
 add_library(GearSrc SHARED ${GearSrc_SRC})
 target_include_directories(GearSrc PUBLIC include)

engine/include/GearSrc/MachDep.h

@@ -6,6 +6,9 @@
 #include <string.h>
 #include <stdarg.h>
 #include <math.h>
+#ifndef _WIN32
+#include <unistd.h>
+#endif
 
 #if defined(_GEARSRC) && defined(_WIN32)
 #define GSDECL extern __declspec(dllexport)

engine/include/GearSrc/Net.h

@@ -0,0 +1,35 @@
+#ifndef __GEARSRC_NET_H__
+#define __GEARSRC_NET_H__
+
+#include <GearSrc/MachDep.h>
+#include <GearSrc/TypeDefs.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* net_client.c */
+GSDECL GSNetClient GSNetClientOpen(GSClient client, const char* hostname, int port);
+GSDECL void	   GSNetClientClose(GSNetClient client);
+
+/* net_server.c */
+GSDECL GSNetServer GSNetServerOpen(GSServer server, int port);
+GSDECL void	   GSNetServerClose(GSNetServer server);
+
+/* net_base.c */
+GSDECL GSBool GSNetBaseHasData(int fd);
+GSDECL int    GSNetBaseServer(int port);
+GSDECL int    GSNetBaseClient(const char* hostname, int port);
+GSDECL void   GSNetBaseClose(int fd);
+GSDECL void   GSNetBaseRead(int fd, void* data, int size, GSNetAddress* address); /* always read 508 bytes! */
+GSDECL void   GSNetBaseWrite(int fd, void* data, int size, GSNetAddress* address);
+
+/* net_packet.c */
+GSDECL void GSNetPacketRead(int fd, GSNetPacket* packet, GSNetAddress* address);
+GSDECL void GSNetPacketWrite(int fd, GSNetPacket* packet, GSNetAddress* address);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

engine/include/GearSrc/TypeDefs.h

@@ -41,11 +41,13 @@ typedef GSU8 GSBool;
 #define GSTrue ((GSBool)1)
 #define GSFalse ((GSBool)0)
 
-typedef struct _GSVersion     GSVersion;
-typedef struct _GSEngineParam GSEngineParam;
-typedef struct _GSResourceKV  GSResourceKV;
-typedef struct _GSBox	      GSBox;
-typedef struct _GSNetPacket GSNetPacket;
+typedef struct _GSVersion	  GSVersion;
+typedef struct _GSEngineParam	  GSEngineParam;
+typedef struct _GSResourceKV	  GSResourceKV;
+typedef struct _GSBox		  GSBox;
+typedef struct _GSNetPacketHeader GSNetPacketHeader;
+typedef struct _GSNetPacket	  GSNetPacket;
+typedef struct _GSNetAddress	  GSNetAddress;
 #ifdef _GEARSRC
 typedef struct _GSClient*      GSClient;
 typedef struct _GSServer*      GSServer;
@@ -58,6 +60,8 @@ typedef struct _GSModel*       GSModel;
 typedef struct _GSSoundDriver* GSSoundDriver;
 typedef struct _GSSoundEngine* GSSoundEngine;
 typedef struct _GSSound*       GSSound;
+typedef struct _GSNetClient*   GSNetClient;
+typedef struct _GSNetServer*   GSNetServer;
 
 typedef struct _GSModelFace	   GSModelFace;
 typedef struct _GSModelMaterial	   GSModelMaterial;
@@ -107,13 +111,25 @@ struct _GSResourceKV {
 };
 
 #pragma pack(1)
-struct _GSNetPacket {
-	GSU8 flag;
+struct _GSNetPacketHeader {
+	GSU8  flag;
 	GSU32 index;
 	GSU32 sequence;
 };
 #pragma pack()
 
+struct _GSNetPacket {
+	GSNetPacketHeader header;
+	unsigned char	  data[508];
+	int		  size;
+};
+
+/* i hope someone adds ipv6 support :) */
+struct _GSNetAddress {
+	GSU32 address;
+	GSU16 port;
+};
+
 #ifdef _GEARSRC
 #include <GearSrc/GL/GL.h>
 #include <miniaudio.h>
@@ -226,6 +242,14 @@ struct _GSSoundEngine {
 	GSSound* sound;
 };
 
+struct _GSNetClient {
+	GSEngine engine;
+};
+
+struct _GSNetServer {
+	GSEngine engine;
+};
+
 struct _GSClient {
 	GSEngine engine;
 

engine/src/net/net_base.c

@@ -0,0 +1,110 @@
+#include <GearSrc/Net.h>
+
+#ifdef _WIN32
+/* TODO: check if this works */
+#include <winsock.h>
+#else
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/select.h>
+#include <netdb.h>
+#endif
+
+static int new_socket(void) {
+	int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+
+#ifdef _WIN32
+	if(fd == INVALID_SOCKET) return -1;
+#else
+	if(fd < 0) return -1;
+#endif
+
+	return fd;
+}
+
+GSBool GSNetBaseHasData(int fd) {
+	fd_set fds;
+
+	FD_ZERO(&fds);
+
+	FD_SET(fd, &fds);
+
+	select(FD_SETSIZE, &fds, NULL, NULL, NULL);
+
+	if(FD_ISSET(fd, &fds)) return GSTrue;
+
+	return GSFalse;
+}
+
+int GSNetBaseServer(int port) {
+	int		   fd;
+	struct sockaddr_in addr;
+	int		   yes = 1;
+
+	if((fd = new_socket()) < 0) return -1;
+
+	setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (const char*)&yes, sizeof(yes));
+
+	addr.sin_family	     = AF_INET;
+	addr.sin_addr.s_addr = INADDR_ANY;
+	addr.sin_port	     = htons(port);
+
+	if(bind(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+		GSNetBaseClose(fd);
+		return -1;
+	}
+
+	return fd;
+}
+
+int GSNetBaseClient(const char* hostname, int port) {
+	struct sockaddr_in addr;
+	int		   fd;
+
+	addr.sin_family	     = AF_INET;
+	addr.sin_addr.s_addr = inet_addr(hostname);
+	addr.sin_port	     = htons(port);
+
+	if(addr.sin_addr.s_addr == 0xffffffff) {
+		struct hostent* host = gethostbyname(hostname);
+		if(host == NULL) return -1;
+
+		addr.sin_addr.s_addr = *(GSU32*)host->h_addr_list[0];
+	}
+
+	if((fd = new_socket()) < 0) return -1;
+
+	connect(fd, (struct sockaddr*)&addr, sizeof(addr));
+
+	return fd;
+}
+
+void GSNetBaseClose(int fd) {
+#ifdef _WIN32
+	closesocket(fd);
+#else
+	close(fd);
+#endif
+}
+
+void GSNetBaseRead(int fd, void* data, int size, GSNetAddress* address) {
+	struct sockaddr_in addr;
+	int		   len = sizeof(addr);
+
+	recvfrom(fd, data, size, 0, (struct sockaddr*)&addr, &len);
+
+	address->address = addr.sin_addr.s_addr;
+	address->port	 = addr.sin_port;
+}
+
+void GSNetBaseWrite(int fd, void* data, int size, GSNetAddress* address) {
+	struct sockaddr_in addr;
+
+	addr.sin_family	     = AF_INET;
+	addr.sin_addr.s_addr = address->address;
+	addr.sin_port	     = address->port;
+
+	sendto(fd, data, size, 0, (struct sockaddr*)&addr, sizeof(addr));
+}

engine/src/net/net_client.c

@@ -0,0 +1 @@
+#include <GearSrc/Net.h>

engine/src/net/net_packet.c

@@ -0,0 +1,9 @@
+#include <GearSrc/Net.h>
+
+#include <GearSrc/Endian.h>
+
+void GSNetPacketRead(int fd, GSNetPacket* packet, GSNetAddress* address) {
+}
+
+void GSNetPacketWrite(int fd, GSNetPacket* packet, GSNetAddress* address) {
+}

engine/src/net/net_server.c

@@ -0,0 +1 @@
+#include <GearSrc/Net.h>