From e7b22a000c65536c397242f9f0c6e5c2ac6a3281 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Wed, 4 Feb 2009 00:27:29 +0000
Subject: added linux support for new ifconfig usage

---
 src/tun_helper.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/tun_helper.h')

diff --git a/src/tun_helper.h b/src/tun_helper.h
index 47c8033..db5fd6a 100644
--- a/src/tun_helper.h
+++ b/src/tun_helper.h
@@ -36,6 +36,9 @@
 #define _TUN_HELPER_H_
 
 #include <string.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
 
 void tun_conf(tun_device_t* dev, const char* dev_name, const char* dev_type, const char* ifcfg_addr, u_int16_t ifcfg_prefix, u_int16_t mtu)
 {
@@ -57,10 +60,21 @@ void tun_conf(tun_device_t* dev, const char* dev_name, const char* dev_type, con
   }
 
   dev->net_addr_ = NULL;
+  dev->net_mask_ = NULL;
   dev->prefix_length_ = 0;
   if(ifcfg_addr) {
     dev->net_addr_ = strdup(ifcfg_addr);
     dev->prefix_length_ = ifcfg_prefix;
+
+    u_int32_t mask = 0;
+    u_int16_t i = 0;
+    for(i = 0; i < ifcfg_prefix; ++i) {
+      mask = mask >> 1;
+      mask |= 0x80000000L;
+    }
+    struct in_addr addr;
+    addr.s_addr = ntohl(mask);
+    dev->net_mask_ = strdup(inet_ntoa(addr));
   }
 }
 
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