chibipub

commit cf6ffb9d5a17ba2539f497c9395cfebb01d564f3
Author: William Casarin <jb55@jb55.com>
Date:   Wed, 18 Nov 2020 09:14:06 -0800

initial commit

Diffstat:
A
.envrc
 | 
1
+
A
.gitignore
 | 
2
++
A
Makefile
 | 
5
+++++
A
default.nix
 | 
7
+++++++
A
wolfsocks.c
 | 
82
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

5 files changed, 97 insertions(+), 0 deletions(-)
diff --git a/.envrc b/.envrc
@@ -0,0 +1 @@
+use nix
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,2 @@
+.build-result
+/wolfsocks
diff --git a/Makefile b/Makefile
@@ -0,0 +1,5 @@
+
+CFLAGS = -Wall -Werror -std=c89
+
+wolfsocks: wolfsocks.c
+	$(CC) $(CFLAGS) $< $(LDFLAGS) -o $@
diff --git a/default.nix b/default.nix
@@ -0,0 +1,7 @@
+{ pkgs ? import <nixpkgs> {} }:
+with pkgs;
+stdenv.mkDerivation {
+  name = "project";
+  nativeBuildInputs = [ ];
+  buildInputs = [ ];
+}
diff --git a/wolfsocks.c b/wolfsocks.c
@@ -0,0 +1,82 @@
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define BUF_SIZE 1024
+
+void error(char *msg) 
+{
+	perror(msg);
+	exit(1);
+}
+
+int main(int argc, char *argv[]) 
+{
+	static const char buffer[BUF_SIZE];
+	int client_len;
+
+	FILE *stream;
+	int parent, client;
+	struct sockaddr_in server_addr, client_addr;
+	struct hostent *client_host;
+	char *client_addr_str;
+
+	if ((parent = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		error("socket");
+	}
+
+	memset(&server_addr, 0, sizeof(server_addr));
+	server_addr.sin_family = AF_INET;
+	server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
+	server_addr.sin_port = htons(5188);
+
+	if (bind(parent, (struct sockaddr *)&server_addr, 
+				sizeof(server_addr)) < 0) {
+		error("bind");
+	}
+
+	if (listen(parent, 5) < 0) {
+		error("listen");
+	}
+
+	client_len = sizeof(client_addr);
+	while (1) {
+		client = accept(parent, (struct sockaddr *) &client_addr,
+				&client_len);
+		if (client < 0) {
+			error("accept");
+		}
+
+		client_host = gethostbyaddr(
+				(const char *)&client_addr.sin_addr.s_addr,
+				sizeof(client_addr.sin_addr.s_addr), AF_INET);
+
+		if (!client_host) {
+			error("gethostbyaddr");
+		}
+
+		client_addr_str = inet_ntoa(client_addr.sin_addr);
+
+		if (!client_addr_str) {
+			error("inet_htoa");
+		}
+
+		if ((stream = open(client, "r+")) == NULL) {
+			error("fdopen");
+		}
+
+		fgets(buffer, BUF_SIZE, stream);
+		printf("%s\n", buffer);
+		fclose(stream);
+		exit(2);
+	}
+
+	return 0;
+}