From 64f825db92ce31102b29ac96fd382ac3643fb6ae Mon Sep 17 00:00:00 2001
From: Tushar Pankaj <tushar.s.pankaj@gmail.com>
Date: Mon, 12 Nov 2018 17:06:07 -0600
Subject: Write client connect_to_server

Signed-off-by: Tushar Pankaj <tushar.s.pankaj@gmail.com>
---
 client.c   | 38 +++++++++++++++++++++++++++++++++++---
 client.h   |  6 +++++-
 protocol.h | 12 ++++++++++++
 3 files changed, 52 insertions(+), 4 deletions(-)
 create mode 100644 protocol.h

diff --git a/client.c b/client.c
index 2c2f091..1a839b9 100644
--- a/client.c
+++ b/client.c
@@ -3,8 +3,40 @@
  * Copyright (C) 2018 Wireguard LLC
  */
 
-int connect_to_server(const char interface[])
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include "protocol.h"
+#include "client.h"
+
+bool is_server_in_allowed_ips(const char interface[])
+{
+	/* TODO: check if IP is in wg allowed ips, etc */
+	return true;
+}
+
+int connect_to_server()
+{
+	int sock = -1;
+	struct sockaddr_in6 addr;
+
+	sock = socket(AF_INET6, SOCK_STREAM, 0);
+	addr.sin6_family = AF_INET6;
+	addr.sin6_port = htons(WG_DYNAMIC_SERVER_PORT);
+	inet_pton(AF_INET6, WG_DYNAMIC_SERVER_IP, &addr.sin6_addr);
+	connect(sock, (struct sockaddr *)&addr, sizeof(addr));
+
+	return sock;
+}
+
+void close_connection(int sock)
 {
-	/* TODO */
-	return -1;
+	if (close(sock) < 0) {
+		perror("error closing socket to server");
+		exit(EXIT_FAILURE);
+	}
 }
diff --git a/client.h b/client.h
index 996cb58..8dd35db 100644
--- a/client.h
+++ b/client.h
@@ -6,6 +6,10 @@
 #ifndef CLIENT_H
 #define CLIENT_H
 
-int connect_to_server(const char interface[]);
+#include <stdbool.h>
+
+bool is_server_in_allowed_ips(const char interface[]);
+int connect_to_server();
+void close_connection(int sock);
 
 #endif
diff --git a/protocol.h b/protocol.h
new file mode 100644
index 0000000..ff6c04d
--- /dev/null
+++ b/protocol.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright (C) 2018 Wireguard LLC
+ */
+
+#ifndef PROTOCOL_H
+#define PROTOCOL_H
+
+#define WG_DYNAMIC_SERVER_IP "::1"
+#define WG_DYNAMIC_SERVER_PORT 51820
+
+#endif
-- 
cgit v1.2.3-59-g8ed1b