From 922694d1c64aec4419e9f472469eb32fb5e4f84e Mon Sep 17 00:00:00 2001
From: Syndamia <kamen@syndamia.com>
Date: Thu, 7 Dec 2023 10:50:19 +0200
Subject: [all] Initial code concept

---
 Makefile  | 10 ++++++++++
 browser.c | 41 +++++++++++++++++++++++++++++++++++++++++
 server.c  | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 util.c    |  7 +++++++
 util.h    |  8 ++++++++
 5 files changed, 122 insertions(+)
 create mode 100644 Makefile
 create mode 100644 browser.c
 create mode 100644 server.c
 create mode 100644 util.c
 create mode 100644 util.h

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..8853e97
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,10 @@
+.PHONY: all
+all: server browser
+
+.PHONY: server
+server:
+	gcc -o server -I. util.c server.c
+
+.PHONY: browser
+browser:
+	gcc -o browser -I. util.c browser.c
diff --git a/browser.c b/browser.c
new file mode 100644
index 0000000..4fbb9ad
--- /dev/null
+++ b/browser.c
@@ -0,0 +1,41 @@
+/* Receives a markdown file and "renders" it
+ */
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <unistd.h>
+#include <stdio.h>
+
+#include <util.h>
+
+int main(int argc, char* argv[]) {
+	int fd_socket = socket(AF_INET, SOCK_STREAM, 0);
+	if (fd_socket < 0) {
+		perror("socket");
+		return 1;
+	}
+
+	struct sockaddr_in sa_server = {
+		.sin_family = AF_INET,
+		.sin_port = inet_atop("8080"),
+	};
+	if (inet_aton("127.0.0.1", &sa_server.sin_addr.s_addr) < 0) {
+		perror("inet_aton");
+		return 2;
+	}
+
+	if (connect(fd_socket, (struct sockaddr*)&sa_server, sizeof(struct sockaddr_in)) < 0) {
+		perror("connect");
+		return 3;
+	}
+
+	char msg[] = "Hello from browser";
+	write(fd_socket, msg, sizeof(msg));
+
+	char buff[256];
+	read(fd_socket, buff, 256);
+	printf("Received: %s\n", buff);
+
+	close(fd_socket);
+}
diff --git a/server.c b/server.c
new file mode 100644
index 0000000..1393302
--- /dev/null
+++ b/server.c
@@ -0,0 +1,56 @@
+/* The server recieves connections and passes files to the clients
+ */
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <unistd.h>
+#include <stdio.h>
+
+#include <util.h>
+
+int main(int argc, char* argv[]) {
+	int fd_socket = socket(AF_INET, SOCK_STREAM, 0);
+	if (fd_socket < 0) {
+		perror("socket");
+		return 1;
+	}
+
+	struct sockaddr_in sa_socket = {
+		.sin_family = AF_INET,
+		.sin_port = inet_atop("8080"),
+	};
+	if (inet_aton("127.0.0.1", &sa_socket.sin_addr.s_addr) < 0) {
+		perror("inet_aton");
+		return 2;
+	}
+
+	int try_bind = bind(fd_socket, (struct sockaddr*)&sa_socket, sizeof(struct sockaddr_in));
+	if (try_bind < 0) {
+		perror("bind");
+		return 3;
+	}
+
+	int try_listen = listen(fd_socket, 50);
+	if (try_listen < 0) {
+		perror("bind");
+		return 4;
+	}
+
+	struct sockaddr_in sa_client;
+	socklen_t sa_client_size = sizeof(struct sockaddr_in);
+	int fd_client = accept(fd_socket, (struct sockaddr*)&sa_client, &sa_client_size);
+	if (fd_client < 0) {
+		perror("accept");
+		return 5;
+	}
+
+	char buff[256];
+	read(fd_client, buff, 256);
+	printf("Received: %s\n", buff);
+
+	char response[] = "Server received message!";
+	write(fd_client, response, sizeof(response));
+
+	close(fd_socket);
+}
diff --git a/util.c b/util.c
new file mode 100644
index 0000000..c8c8c70
--- /dev/null
+++ b/util.c
@@ -0,0 +1,7 @@
+#include <util.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+
+uint16_t inet_atop(const char *port) {
+	return htons(atoi(port));
+}
diff --git a/util.h b/util.h
new file mode 100644
index 0000000..98799ad
--- /dev/null
+++ b/util.h
@@ -0,0 +1,8 @@
+#ifndef H_UTIL
+#define H_UTIL
+
+#include <inttypes.h>
+
+uint16_t inet_atop(const char *port);
+
+#endif
-- 
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