From a827b0a839c15a9a955efb7deb2525d99ae055e4 Mon Sep 17 00:00:00 2001
From: drbob <retroshare.project@gmail.com>
Date: Sat, 7 Jun 2008 11:19:09 +0000
Subject: [PATCH] Moved several network related functions from pqinetwork to
 here.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@581 b45a01b8-16f6-495d-af2f-9b41ad6348cc
---
 libretroshare/src/util/rsnet.cc | 59 +++++++++++++++++++++++++++++++++
 libretroshare/src/util/rsnet.h  |  7 ++++
 2 files changed, 66 insertions(+)

diff --git a/libretroshare/src/util/rsnet.cc b/libretroshare/src/util/rsnet.cc
index d53d9120a..938f15c98 100644
--- a/libretroshare/src/util/rsnet.cc
+++ b/libretroshare/src/util/rsnet.cc
@@ -66,3 +66,62 @@ void sockaddr_clear(struct sockaddr_in *addr)
         addr->sin_family = AF_INET;
 }
 
+
+bool    isValidNet(struct in_addr *addr)
+{
+        // invalid address.
+	if((*addr).s_addr == INADDR_NONE)
+		return false;
+	if((*addr).s_addr == 0)
+		return false;
+	// should do more tests.
+	return true;
+}
+
+
+bool    isLoopbackNet(struct in_addr *addr)
+{
+	in_addr_t taddr = ntohl(addr->s_addr);
+	return (taddr == (127 << 24 | 1));
+}
+
+bool    isPrivateNet(struct in_addr *addr)
+{
+	in_addr_t taddr = ntohl(addr->s_addr);
+
+	// 10.0.0.0/8
+	// 172.16.0.0/12
+	// 192.168.0.0/16
+	// 169.254.0.0/16
+	if ((taddr>>24 == 10) ||
+ 		(taddr>>20 == (172<<4 | 16>>4)) ||
+ 		(taddr>>16 == (192<<8 | 168)) ||
+ 		(taddr>>16 == (169<<8 | 254)))
+	{
+		return true;
+	}
+	else
+	{
+		return false;
+	}
+}
+
+bool    isExternalNet(struct in_addr *addr)
+{
+	if (!isValidNet(addr))
+	{
+		return false;
+	}
+	if (isLoopbackNet(addr))
+	{
+		return false;
+	}
+	if (isPrivateNet(addr))
+	{
+		return false;
+	}
+	return true;
+}
+
+
+
diff --git a/libretroshare/src/util/rsnet.h b/libretroshare/src/util/rsnet.h
index 47430ccbe..4a007eebb 100644
--- a/libretroshare/src/util/rsnet.h
+++ b/libretroshare/src/util/rsnet.h
@@ -60,4 +60,11 @@ uint64_t htonll(uint64_t x);
 /* blank a network address */
 void sockaddr_clear(struct sockaddr_in *addr);
 
+/* determine network type (moved from pqi/pqinetwork.cc) */
+bool isValidNet(struct in_addr *addr);
+bool isLoopbackNet(struct in_addr *addr);
+bool isPrivateNet(struct in_addr *addr);
+bool isExternalNet(struct in_addr *addr);
+
+
 #endif /* RS_UNIVERSAL_NETWORK_HEADER */