add basic udp server and client

5 files changed, 95 insertions, 17 deletions

diff --git a/Makefile b/Makefile
index a14dbf8..65ffe9d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,6 @@
 CC = gcc-15
-CFLAGS = -Wall -Wextra
+CFLAGS = -MMD -MP -Wall -Wextra -pthread
+LDFLAGS = -pthread
 
 SERVER_BUILD = build/server
 SERVER_TARGET = bin/server
@@ -11,22 +12,26 @@ CLIENT_TARGET = bin/client
 CLIENT_SRC = $(shell find client -name "*.c")
 CLIENT_OBJ = $(CLIENT_SRC:client/%.c=$(CLIENT_BUILD)/%.o)
 CLIENT_CFLAGS  = $(CFLAGS) $(shell pkg-config --cflags raylib)
-CLIENT_LDFLAGS = $(shell pkg-config --libs raylib)
+CLIENT_LDFLAGS = $(LDFLAGS) $(shell pkg-config --libs raylib)
 
-all: $(SERVER_TARGET) $(CLIENT_TARGET)
+-include $(SERVER_OBJ:.o=.d)
+-include $(CLIENT_OBJ:.o=.d)
 
 .PHONY: all clean server client
 
+all: $(SERVER_TARGET) $(CLIENT_TARGET)
+
 server: $(SERVER_TARGET)
 client: $(CLIENT_TARGET)
 
-$(SERVER_TARGET): $(SERVER_OBJ)
+bin:
 	mkdir -p bin
-	$(CC) $(CFLAGS) $(SERVER_OBJ) -o $(SERVER_TARGET)
 
-$(CLIENT_TARGET): $(CLIENT_OBJ)
-	mkdir -p bin
-	$(CC) $(CLIENT_CFLAGS) $(CLIENT_OBJ) $(CLIENT_LDFLAGS) -o $(CLIENT_TARGET)
+$(SERVER_TARGET): $(SERVER_OBJ) | bin
+	$(CC) $(LDFLAGS) $(SERVER_OBJ) -o $(SERVER_TARGET)
+
+$(CLIENT_TARGET): $(CLIENT_OBJ) | bin
+	$(CC) $(CLIENT_LDFLAGS) $(CLIENT_OBJ) -o $(CLIENT_TARGET)
 
 $(SERVER_BUILD)/%.o: server/%.c
 	mkdir -p $(dir $@)
diff --git a/client/main.c b/client/main.c
index a38f470..c0ed27e 100644
--- a/client/main.c
+++ b/client/main.c
@@ -1,5 +1,6 @@
 #include "raylib.h"
 #include <stdio.h>
+#include "net/net.h"
 
 int main() {
   const int screenWidth = 800;
@@ -29,28 +30,33 @@ int main() {
   while (!WindowShouldClose()) {
 
     bool connecting = false;
-    if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) {
+    if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) {
       struct Vector2 mousePos = GetMousePosition();
 
       if (mousePos.x >= buttonPosX && mousePos.x <= buttonPosX + buttonW &&
           mousePos.y >= buttonPosY && mousePos.y <= buttonPosY + buttonH) {
 
-	connecting = true;
+        connecting = true;
       }
     }
 
     BeginDrawing();
         ClearBackground(RAYWHITE);
-	DrawText(message, messagePosX, messagePosY, fontSize, LIGHTGRAY);
-	DrawRectangle(buttonPosX, buttonPosY, buttonW, buttonH, GREEN);
+        DrawText(message, messagePosX, messagePosY, fontSize, LIGHTGRAY);
 
-	if(connecting)
-	  DrawText(connect, connectPosX, connectPosY, fontSize, RED);
-	else
-	  DrawText(connect, connectPosX, connectPosY, fontSize, BLUE);
+	if(connecting) {
+	  DrawRectangle(buttonPosX, buttonPosY, buttonW, buttonH, RED);
+        } else {
+          DrawRectangle(buttonPosX, buttonPosY, buttonW, buttonH, GREEN);
+	}
+
+	DrawText(connect, connectPosX, connectPosY, fontSize, BLUE);
 
 	DrawFPS(0,0);
     EndDrawing();
+
+    if (connecting)
+      ServerConnect();
   }
 
   return 0;
diff --git a/client/net/net.c b/client/net/net.c
new file mode 100644
index 0000000..be61104
--- /dev/null
+++ b/client/net/net.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <err.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <time.h>
+#include "net.h"
+
+void ServerConnect() {
+  int fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+  if (fd == -1)
+    err(EXIT_FAILURE, "socket failed");
+
+  char buff[64];
+
+  struct sockaddr_in server;
+  server.sin_family = AF_INET;
+  server.sin_port = htons(8080);
+  server.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+  sendto(fd, buff, sizeof(buff), 0, (struct sockaddr *)&server, sizeof(server));
+
+  close(fd);
+}
diff --git a/client/net/net.h b/client/net/net.h
new file mode 100644
index 0000000..7947419
--- /dev/null
+++ b/client/net/net.h
@@ -0,0 +1 @@
+void ServerConnect();
diff --git a/server/main.c b/server/main.c
index 237c8ce..789d392 100644
--- a/server/main.c
+++ b/server/main.c
@@ -1 +1,41 @@
-int main() {}
+#include <stdio.h>
+#include <stdlib.h>
+#include <err.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include <time.h>
+
+int main() {
+  int fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+  if (fd == -1)
+    err(EXIT_FAILURE, "socket failed");
+
+  struct sockaddr_in address;
+  address.sin_family = AF_INET;
+  address.sin_port = htons(8080);
+  address.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+
+  if (bind(fd, (struct sockaddr *)&address, sizeof(address)) == -1) {
+    close(fd);
+    err(EXIT_FAILURE, "bind failed");
+  }
+
+  time_t startTime = time(NULL);
+
+  while (time(NULL) < startTime + 60) {
+    struct sockaddr connection;
+    socklen_t connectionLen = sizeof(connection);
+    char buff[64];
+
+    int size = recvfrom(fd, buff, sizeof(buff), MSG_DONTWAIT,
+                        (struct sockaddr *)&connection, &connectionLen);
+
+    if (size != -1)
+      printf("got a message\n");
+  }
+
+  close(fd);
+  return 0;
+}