From 2820565ea35791a45b0f897b3c15e9c4527d6d67 Mon Sep 17 00:00:00 2001
From: brain <brain@e03df62e-2008-0410-955e-edbf42e46eb7>
Date: Fri, 4 Aug 2006 15:16:37 +0000
Subject: Fixes for ::0 ip's, disable autobind when using ::ffff: etc

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@4703 e03df62e-2008-0410-955e-edbf42e46eb7
---
 src/dns.cpp                    |  8 ++++++++
 src/inspsocket.cpp             |  9 ++++++---
 src/modules/m_spanningtree.cpp |  2 +-
 src/users.cpp                  | 17 +++++++++++++++++
 4 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/src/dns.cpp b/src/dns.cpp
index 0a22b28d8..0436095b6 100644
--- a/src/dns.cpp
+++ b/src/dns.cpp
@@ -645,6 +645,14 @@ DNSResult DNS::GetResult()
 						memmove(formatted,formatted + 1, strlen(formatted + 1) + 1);
 				}
 				resultstr = formatted;
+
+				/* Special case. Sending ::1 around between servers
+				 * and to clients is dangerous, because the : on the
+				 * start makes the client or server interpret the IP
+				 * as the last parameter on the line with a value ":1".
+				 */
+				if (*formatted == ':')
+					resultstr = "0" + resultstr;
 			}
 			break;
 
diff --git a/src/inspsocket.cpp b/src/inspsocket.cpp
index f738835a8..17268dc78 100644
--- a/src/inspsocket.cpp
+++ b/src/inspsocket.cpp
@@ -215,14 +215,17 @@ bool InspSocket::DoConnect()
 		return false;
 	}
 
-	if (!this->BindAddr())
-		return false;
+	if ((strstr(this->IP,"::ffff:") != (char*)&this->IP) && (strstr(this->IP,"::FFFF:") != (char*)&this->IP))
+	{
+		if (!this->BindAddr())
+			return false;
+	}
 
 	log(DEBUG,"Part 2 DoConnect() %s",this->IP);
 	insp_aton(this->IP,&addy);
 #ifdef IPV6
 	addr.sin6_family = AF_FAMILY;
-	memcpy(&addy, &addr.sin6_addr, sizeof(insp_inaddr));
+	memcpy(&addr.sin6_addr, &addy, sizeof(insp_inaddr));
 	addr.sin6_port = htons(this->port);
 #else
 	addr.sin_family = AF_FAMILY;
diff --git a/src/modules/m_spanningtree.cpp b/src/modules/m_spanningtree.cpp
index 071da8ac3..43c7bb773 100644
--- a/src/modules/m_spanningtree.cpp
+++ b/src/modules/m_spanningtree.cpp
@@ -1527,7 +1527,7 @@ class TreeSocket : public InspSocket
 			return true;
 		}
 		// NICK age nick host dhost ident +modes ip :gecos
-		//   0   123  4 56   7
+		//       0    1   2     3     4      5   6     7
 		time_t age = atoi(params[0].c_str());
 		
 		/* This used to have a pretty craq'y loop doing the same thing,
diff --git a/src/users.cpp b/src/users.cpp
index f5ceabf37..0e29519d5 100644
--- a/src/users.cpp
+++ b/src/users.cpp
@@ -1153,6 +1153,9 @@ void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
 
 int userrec::GetPort()
 {
+	if (this->ip == NULL)
+		return 0;
+
 	switch (this->GetProtocolFamily())
 	{
 #ifdef SUPPORT_IP6LINKS
@@ -1178,6 +1181,9 @@ int userrec::GetPort()
 
 int userrec::GetProtocolFamily()
 {
+	if (this->ip == NULL)
+		return 0;
+
 	sockaddr_in* sin = (sockaddr_in*)this->ip;
 	return sin->sin_family;
 }
@@ -1185,6 +1191,10 @@ int userrec::GetProtocolFamily()
 const char* userrec::GetIPString()
 {
 	static char buf[1024];
+	static char temp[1024];
+
+	if (this->ip == NULL)
+		return "";
 
 	switch (this->GetProtocolFamily())
 	{
@@ -1193,6 +1203,13 @@ const char* userrec::GetIPString()
 		{
 			sockaddr_in6* sin = (sockaddr_in6*)this->ip;
 			inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
+			/* IP addresses starting with a : on irc are a Bad Thing (tm) */
+			if (*buf == ':')
+			{
+				strlcpy(&temp[1], buf, sizeof(temp));
+				*temp = '0';
+				return temp;
+			}
 			return buf;
 		}
 		break;
-- 
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