From d9b4390dbc7af872a143eacf35dde3b0db438119 Mon Sep 17 00:00:00 2001
From: brain <brain@e03df62e-2008-0410-955e-edbf42e46eb7>
Date: Sun, 6 Aug 2006 16:51:45 +0000
Subject: Add <link:allowmask>

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@4735 e03df62e-2008-0410-955e-edbf42e46eb7
---
 src/modules/m_spanningtree.cpp | 19 +++++++++++++++----
 src/socket.cpp                 | 12 ++++++++----
 2 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/src/modules/m_spanningtree.cpp b/src/modules/m_spanningtree.cpp
index e98b7b460..91a917b8e 100644
--- a/src/modules/m_spanningtree.cpp
+++ b/src/modules/m_spanningtree.cpp
@@ -3050,13 +3050,20 @@ class TreeSocket : public InspSocket
 		 * IPs for which we don't have a link block.
 		 */
 		bool found = false;
-		vector<Link>::iterator i;
+
 		found = (std::find(ValidIPs.begin(), ValidIPs.end(), ip) != ValidIPs.end());
 		if (!found)
 		{
-			WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
-			close(newsock);
-			return false;
+			for (vector<std::string>::iterator i = ValidIPs.begin(); i != ValidIPs.end(); i++)
+				if (MatchCIDR(ip, (*i).c_str()))
+					found = true;
+
+			if (!found)
+			{
+				WriteOpers("Server connection from %s denied (no link blocks with that IP address)", ip);
+				close(newsock);
+				return false;
+			}
 		}
 		TreeSocket* s = new TreeSocket(newsock, ip);
 		Srv->AddSocket(s);
@@ -3345,6 +3352,7 @@ void ReadConfiguration(bool rebind)
 	for (int j =0; j < Conf->Enumerate("link"); j++)
 	{
 		Link L;
+		std::string Allow = Conf->ReadValue("link","allowmask",j);
 		L.Name = (Conf->ReadValue("link","name",j)).c_str();
 		L.IPAddr = Conf->ReadValue("link","ipaddr",j);
 		L.Port = Conf->ReadInteger("link","port",j,true);
@@ -3359,6 +3367,9 @@ void ReadConfiguration(bool rebind)
 		{
 			ValidIPs.push_back(L.IPAddr);
 
+			if (Allow.length())
+				ValidIPs.push_back(Allow);
+
 			/* Needs resolving */
 			insp_inaddr binip;
 			if (insp_aton(L.IPAddr.c_str(), &binip) < 1)
diff --git a/src/socket.cpp b/src/socket.cpp
index 993b7e90b..b45322c3d 100644
--- a/src/socket.cpp
+++ b/src/socket.cpp
@@ -45,6 +45,10 @@ bool MatchCIDRBits(unsigned char* address, unsigned char* mask, unsigned int mas
 	unsigned int modulus = mask_bits % 8; /* Number of whole bytes in the mask */
 	unsigned int divisor = mask_bits / 8; /* Remaining bits in the mask after whole bytes are dealt with */
 
+	/* We shouldnt match anything, /0 is always valid */
+	if (!mask_bits)
+		return true;
+
 	/* First compare the whole bytes, if they dont match, return false */
 	if (memcmp(address, mask, divisor))
 		return false;
@@ -97,8 +101,8 @@ bool MatchCIDR(const char* address, const char* cidr_mask)
 			memcpy(&addr_raw, &address_in6.s6_addr, 16);
 			memcpy(&mask_raw, &mask_in6.s6_addr, 16);
 
-			if (mask > 128)
-				mask = 128;
+			if (bits > 128)
+				bits = 128;
 		}
 		else
 		{
@@ -115,8 +119,8 @@ bool MatchCIDR(const char* address, const char* cidr_mask)
 			memcpy(&addr_raw, &address_in4.s_addr, 4);
 			memcpy(&mask_raw, &mask_in4.s_addr, 4);
 
-			if (mask > 32)
-				mask = 32;
+			if (bits > 32)
+				bits = 32;
 		}
 		else
 		{
-- 
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