hostname client, ip client

client1/.clangd

@@ -0,0 +1,4 @@
+CompileFlags:
+  Add: 
+    - -Isrc
+    - -std=c11

client1/Makefile

@@ -0,0 +1,69 @@
+APPNAME = networkc
+SRCDIR = src
+BUILDDIR = build
+VENDORDIR = vendor
+
+target ?= linux
+profile ?= debug
+valgrind ?= false
+
+ifeq ($(target), windows)
+	CC = x86_64-w64-mingw32-gcc
+	EXT = .exe
+	
+	OPT_FLAGS = -O2 -DNDEBUG
+	
+	INCLUDES = -I$(SRCDIR)
+	LIBS =
+	
+	# Command to copy DLL after build
+	POST_BUILD_CMD = #@cp .. $(BUILDDIR); @echo "Build complete."
+
+else
+	CC = gcc
+	EXT =
+	
+	INCLUDES = -I$(SRCDIR)
+	LIBS =
+	POST_BUILD_CMD = @echo "Build complete."
+
+	# Profile Logic
+	ifeq ($(profile), release)
+		OPT_FLAGS = -O3 -DNDEBUG -march=native
+	else
+		OPT_FLAGS = -O0 -g -DDEBUG -Wall -Wextra
+	endif
+endif
+
+# Combine Flags
+CFLAGS = -Wall $(OPT_FLAGS) $(INCLUDES)
+
+SRC = $(shell find $(SRCDIR) -name "*.c")
+OBJ = $(SRC:$(SRCDIR)/%.c=$(BUILDDIR)/%.o)
+
+all: $(BUILDDIR)/$(APPNAME)$(EXT)
+
+$(BUILDDIR)/$(APPNAME)$(EXT): $(OBJ)
+	@echo "Linking $@ (Target: $(target), Profile: $(profile))"
+	@mkdir -p $(dir $@)
+	$(CC) $(OBJ) -o $@ $(LIBS)
+	$(POST_BUILD_CMD)
+
+$(BUILDDIR)/%.o: $(SRCDIR)/%.c
+	@echo "Compiling $<"
+	@mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+	rm -rf $(BUILDDIR)
+
+ifeq ($(valgrind), true)
+    RUN_CMD = valgrind --leak-check=full ./$(BUILDDIR)/$(APPNAME)$(EXT)
+else
+    RUN_CMD = ./$(BUILDDIR)/$(APPNAME)$(EXT)
+endif
+
+run: all
+	$(RUN_CMD)
+
+.PHONY: all clean run

client1/compile_commands.json

@@ -0,0 +1,21 @@
+[
+  {
+    "file": "src/main.c",
+    "arguments": [
+      "gcc",
+      "-Wall",
+      "-O0",
+      "-g",
+      "-DDEBUG",
+      "-Wall",
+      "-Wextra",
+      "-Isrc",
+      "-c",
+      "src/main.c",
+      "-o",
+      "build/main.o"
+    ],
+    "directory": "/home/tom/Dev/networkc",
+    "output": "build/main.o"
+  }
+]

client1/src/main.c

@@ -0,0 +1,49 @@
+#include "sockets.h"
+
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+int main() {
+    int socket_desc;
+    socket_desc = socket(AF_INET, SOCK_STREAM, 0);
+
+    if (socket_desc == -1) {
+        printf("Could not create a socket!");
+        return 1;
+    }
+
+    struct sockaddr_in server;
+    server.sin_addr.s_addr = inet_addr("142.250.180.206");
+    server.sin_family = AF_INET;
+    server.sin_port = htons(80);
+
+    // connect to remote server
+    if (connect(socket_desc, (struct sockaddr *)&server, sizeof(server)) < 0) {
+        puts("connection error\n");
+        return 1;
+    }
+
+    puts("connected\n");
+
+    const char *message = "GET / HTTP/1.1\r\n\r\n";
+    if (send(socket_desc, message, strlen(message), 0) < 0) {
+        puts("send failed\n");
+        return 1;
+    }
+
+    puts("Data sent\n");
+
+    char server_reply[2000];
+    if (recv(socket_desc, server_reply, 2000, 0) < 0) {
+        puts("recv failed\n");
+    }
+    puts("Reply:\n");
+    puts(server_reply);
+
+    close(socket_desc);
+
+    return 0;
+}

client1/src/sockets.h

@@ -0,0 +1,16 @@
+struct in_address {
+    unsigned long s_addr; // load with inet_pton()
+};
+
+// IPv4 AF_INET sockets:
+struct sockaddress_in {
+    short sin_family;        // ipv4 or v6
+    unsigned short sin_port; // htons(3490)
+    struct in_address sin_addr;
+    char sin_zero[8];
+};
+
+struct sockaddress {
+    unsigned short sa_family; // address family AF_XXX
+    char sa_data[14];         // 14 bytes of protocal address
+};

client2/.clangd

@@ -0,0 +1,4 @@
+CompileFlags:
+  Add: 
+    - -Isrc
+    - -std=c11

client2/Makefile

@@ -0,0 +1,69 @@
+APPNAME = networkc
+SRCDIR = src
+BUILDDIR = build
+VENDORDIR = vendor
+
+target ?= linux
+profile ?= debug
+valgrind ?= false
+
+ifeq ($(target), windows)
+	CC = x86_64-w64-mingw32-gcc
+	EXT = .exe
+	
+	OPT_FLAGS = -O2 -DNDEBUG
+	
+	INCLUDES = -I$(SRCDIR)
+	LIBS =
+	
+	# Command to copy DLL after build
+	POST_BUILD_CMD = #@cp .. $(BUILDDIR); @echo "Build complete."
+
+else
+	CC = gcc
+	EXT =
+	
+	INCLUDES = -I$(SRCDIR)
+	LIBS =
+	POST_BUILD_CMD = @echo "Build complete."
+
+	# Profile Logic
+	ifeq ($(profile), release)
+		OPT_FLAGS = -O3 -DNDEBUG -march=native
+	else
+		OPT_FLAGS = -O0 -g -DDEBUG -Wall -Wextra
+	endif
+endif
+
+# Combine Flags
+CFLAGS = -Wall $(OPT_FLAGS) $(INCLUDES)
+
+SRC = $(shell find $(SRCDIR) -name "*.c")
+OBJ = $(SRC:$(SRCDIR)/%.c=$(BUILDDIR)/%.o)
+
+all: $(BUILDDIR)/$(APPNAME)$(EXT)
+
+$(BUILDDIR)/$(APPNAME)$(EXT): $(OBJ)
+	@echo "Linking $@ (Target: $(target), Profile: $(profile))"
+	@mkdir -p $(dir $@)
+	$(CC) $(OBJ) -o $@ $(LIBS)
+	$(POST_BUILD_CMD)
+
+$(BUILDDIR)/%.o: $(SRCDIR)/%.c
+	@echo "Compiling $<"
+	@mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+	rm -rf $(BUILDDIR)
+
+ifeq ($(valgrind), true)
+    RUN_CMD = valgrind --leak-check=full ./$(BUILDDIR)/$(APPNAME)$(EXT)
+else
+    RUN_CMD = ./$(BUILDDIR)/$(APPNAME)$(EXT)
+endif
+
+run: all
+	$(RUN_CMD)
+
+.PHONY: all clean run

client2/compile_commands.json

@@ -0,0 +1,21 @@
+[
+  {
+    "file": "src/main.c",
+    "arguments": [
+      "gcc",
+      "-Wall",
+      "-O0",
+      "-g",
+      "-DDEBUG",
+      "-Wall",
+      "-Wextra",
+      "-Isrc",
+      "-c",
+      "src/main.c",
+      "-o",
+      "build/main.o"
+    ],
+    "directory": "/home/tom/Dev/networkc",
+    "output": "build/main.o"
+  }
+]

client2/src/main.c

@@ -0,0 +1,29 @@
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/socket.h>
+
+int main() {
+    char *hostname = "www.motionweb.hu";
+    char ip[100];
+    struct hostent *he;
+    struct in_addr **addr_list;
+    int i;
+
+    if ((he = gethostbyname(hostname)) == NULL) {
+        puts("gethostbyname error\n");
+        return 1;
+    }
+
+    // Cast the h_addr_list to in_addr , since h_addr_list also has the ip address in long format only
+    addr_list = (struct in_addr **)he->h_addr_list;
+
+    for (i = 0; addr_list[i] != NULL; i++) {
+        // return the first one
+        strcpy(ip, inet_ntoa(*addr_list[i]));
+    }
+    printf("%s resolved to : %s", hostname, ip);
+
+    return 0;
+}