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authorOthmar Gsenger <otti@anytun.org>2008-04-12 11:38:42 +0000
committerOthmar Gsenger <otti@anytun.org>2008-04-12 11:38:42 +0000
commitfffd213c8cba2135afda493d797c41c10354770e (patch)
treebb5eea1b12871d8c3fed0e687d83be3e504d11b2 /src/Sockets/ResolvSocket.cpp
parentsvn cleanup (diff)
big svn cleanup
Diffstat (limited to 'src/Sockets/ResolvSocket.cpp')
-rw-r--r--src/Sockets/ResolvSocket.cpp436
1 files changed, 436 insertions, 0 deletions
diff --git a/src/Sockets/ResolvSocket.cpp b/src/Sockets/ResolvSocket.cpp
new file mode 100644
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+++ b/src/Sockets/ResolvSocket.cpp
@@ -0,0 +1,436 @@
+/** \file ResolvSocket.cpp
+ ** \date 2005-03-24
+ ** \author grymse@alhem.net
+**/
+/*
+Copyright (C) 2004-2007 Anders Hedstrom
+
+This library is made available under the terms of the GNU GPL.
+
+If you would like to use this library in a closed-source application,
+a separate license agreement is available. For information about
+the closed-source license agreement for the C++ sockets library,
+please visit http://www.alhem.net/Sockets/license.html and/or
+email license@alhem.net.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+#ifdef _WIN32
+#ifdef _MSC_VER
+#pragma warning(disable:4786)
+#pragma warning(disable:4503)
+#endif
+#else
+#include <netdb.h>
+#endif
+#include "ResolvSocket.h"
+#ifdef ENABLE_RESOLVER
+#include "Utility.h"
+#include "Parse.h"
+#include "ISocketHandler.h"
+#include "Lock.h"
+#include "Mutex.h"
+
+#ifdef SOCKETS_NAMESPACE
+namespace SOCKETS_NAMESPACE {
+#endif
+
+#ifdef _DEBUG
+#define DEB(x) x
+#else
+#define DEB(x)
+#endif
+
+
+// static
+ResolvSocket::cache_t ResolvSocket::m_cache;
+ResolvSocket::timeout_t ResolvSocket::m_cache_to;
+Mutex ResolvSocket::m_cache_mutex;
+
+
+ResolvSocket::ResolvSocket(ISocketHandler& h)
+:TcpSocket(h)
+,m_bServer(false)
+,m_parent(NULL)
+#ifdef ENABLE_IPV6
+,m_resolve_ipv6(false)
+#endif
+,m_cached(false)
+{
+ SetLineProtocol();
+}
+
+
+ResolvSocket::ResolvSocket(ISocketHandler& h, Socket *parent, const std::string& host, port_t port, bool ipv6)
+:TcpSocket(h)
+,m_bServer(false)
+,m_parent(parent)
+,m_resolv_host(host)
+,m_resolv_port(port)
+#ifdef ENABLE_IPV6
+,m_resolve_ipv6(ipv6)
+#endif
+,m_cached(false)
+{
+ SetLineProtocol();
+}
+
+
+ResolvSocket::ResolvSocket(ISocketHandler& h, Socket *parent, ipaddr_t a)
+:TcpSocket(h)
+,m_bServer(false)
+,m_parent(parent)
+,m_resolv_port(0)
+,m_resolv_address(a)
+#ifdef ENABLE_IPV6
+,m_resolve_ipv6(false)
+#endif
+,m_cached(false)
+{
+ SetLineProtocol();
+}
+
+
+#ifdef ENABLE_IPV6
+ResolvSocket::ResolvSocket(ISocketHandler& h, Socket *parent, in6_addr& a)
+:TcpSocket(h)
+,m_bServer(false)
+,m_parent(parent)
+,m_resolv_port(0)
+,m_resolve_ipv6(true)
+,m_resolv_address6(a)
+,m_cached(false)
+{
+ SetLineProtocol();
+}
+#endif
+
+
+ResolvSocket::~ResolvSocket()
+{
+}
+
+
+void ResolvSocket::OnLine(const std::string& line)
+{
+ Parse pa(line, ":");
+ if (m_bServer)
+ {
+ m_query = pa.getword();
+ m_data = pa.getrest();
+DEB( fprintf(stderr, " *** ResolvSocket server; query=%s, data=%s\n", m_query.c_str(), m_data.c_str());)
+ // %! check cache
+ {
+ Lock lock(m_cache_mutex);
+ if (m_cache[m_query].find(m_data) != m_cache[m_query].end())
+ {
+ if (time(NULL) - m_cache_to[m_query][m_data] < 3600) // ttl
+ {
+ std::string result = m_cache[m_query][m_data];
+DEB(fprintf(stderr, " *** Returning cache for [%s][%s] = '%s'\n", m_query.c_str(), m_data.c_str(), result.c_str());)
+ Send("Cached\n");
+ if (!result.size()) /* failed */
+ {
+ Send("Failed\n\n");
+ SetCloseAndDelete();
+ return;
+ }
+ else
+ if (m_query == "gethostbyname")
+ {
+ Send("A: " + result + "\n\n");
+ SetCloseAndDelete();
+ return;
+ }
+ else
+#ifdef ENABLE_IPV6
+#ifdef IPPROTO_IPV6
+ if (m_query == "gethostbyname2")
+ {
+ Send("AAAA: " + result + "\n\n");
+ SetCloseAndDelete();
+ return;
+ }
+ else
+#endif
+#endif
+ if (m_query == "gethostbyaddr")
+ {
+ Send("Name: " + result + "\n\n");
+ SetCloseAndDelete();
+ return;
+ }
+ }
+ }
+ }
+ if (!Detach()) // detach failed?
+ {
+ SetCloseAndDelete();
+ }
+ return;
+ }
+ std::string key = pa.getword();
+ std::string value = pa.getrest();
+DEB( fprintf(stderr, " *** ResolvSocket response; %s: %s\n", key.c_str(), value.c_str());)
+
+ if (key == "Cached")
+ {
+ m_cached = true;
+ }
+ else
+ if (key == "Failed" && m_parent)
+ {
+DEB( fprintf(stderr, " ************ Resolve failed\n");)
+ if (Handler().Resolving(m_parent) || Handler().Valid(m_parent))
+ {
+ m_parent -> OnResolveFailed(m_resolv_id);
+ }
+ // update cache
+ if (!m_cached)
+ {
+ Lock lock(m_cache_mutex);
+DEB(fprintf(stderr, " *** Update cache for [%s][%s] = '%s'\n", m_query.c_str(), m_data.c_str(), value.c_str());)
+ m_cache[m_query][m_data] = value;
+ m_cache_to[m_query][m_data] = time(NULL);
+ }
+ m_parent = NULL;
+ }
+ else
+ if (key == "Name" && !m_resolv_host.size() && m_parent)
+ {
+ if (Handler().Resolving(m_parent) || Handler().Valid(m_parent))
+ {
+ m_parent -> OnReverseResolved(m_resolv_id, value);
+ }
+ // update cache
+ if (!m_cached)
+ {
+ Lock lock(m_cache_mutex);
+DEB(fprintf(stderr, " *** Update cache for [%s][%s] = '%s'\n", m_query.c_str(), m_data.c_str(), value.c_str());)
+ m_cache[m_query][m_data] = value;
+ m_cache_to[m_query][m_data] = time(NULL);
+ }
+ m_parent = NULL;
+ }
+ else
+ if (key == "A" && m_parent)
+ {
+ if (Handler().Resolving(m_parent) || Handler().Valid(m_parent))
+ {
+ ipaddr_t l;
+ Utility::u2ip(value, l); // ip2ipaddr_t
+ m_parent -> OnResolved(m_resolv_id, l, m_resolv_port);
+ }
+ // update cache
+ if (!m_cached)
+ {
+ Lock lock(m_cache_mutex);
+DEB(fprintf(stderr, " *** Update cache for [%s][%s] = '%s'\n", m_query.c_str(), m_data.c_str(), value.c_str());)
+ m_cache[m_query][m_data] = value;
+ m_cache_to[m_query][m_data] = time(NULL);
+ }
+ m_parent = NULL; // always use first ip in case there are several
+ }
+#ifdef ENABLE_IPV6
+#ifdef IPPROTO_IPV6
+ else
+ if (key == "AAAA" && m_parent)
+ {
+ if (Handler().Resolving(m_parent) || Handler().Valid(m_parent))
+ {
+ in6_addr a;
+ Utility::u2ip(value, a);
+ m_parent -> OnResolved(m_resolv_id, a, m_resolv_port);
+ }
+ // update cache
+ if (!m_cached)
+ {
+ Lock lock(m_cache_mutex);
+DEB(fprintf(stderr, " *** Update cache for [%s][%s] = '%s'\n", m_query.c_str(), m_data.c_str(), value.c_str());)
+ m_cache[m_query][m_data] = value;
+ m_cache_to[m_query][m_data] = time(NULL);
+ }
+ m_parent = NULL;
+ }
+#endif
+#endif
+}
+
+
+void ResolvSocket::OnDetached()
+{
+DEB( fprintf(stderr, " *** ResolvSocket::OnDetached(); query=%s, data=%s\n", m_query.c_str(), m_data.c_str());)
+ if (m_query == "gethostbyname")
+ {
+ struct sockaddr_in sa;
+ if (Utility::u2ip(m_data, sa))
+ {
+ std::string ip;
+ Utility::l2ip(sa.sin_addr, ip);
+ Send("A: " + ip + "\n");
+ }
+ else
+ {
+ Send("Failed\n");
+ }
+ Send("\n");
+ }
+ else
+#ifdef ENABLE_IPV6
+#ifdef IPPROTO_IPV6
+ if (m_query == "gethostbyname2")
+ {
+ struct sockaddr_in6 sa;
+ if (Utility::u2ip(m_data, sa))
+ {
+ std::string ip;
+ Utility::l2ip(sa.sin6_addr, ip);
+ Send("AAAA: " + ip + "\n");
+ }
+ else
+ {
+ Send("Failed\n");
+ }
+ Send("\n");
+ }
+ else
+#endif
+#endif
+ if (m_query == "gethostbyaddr")
+ {
+ if (Utility::isipv4( m_data ))
+ {
+ struct sockaddr_in sa;
+ if (!Utility::u2ip(m_data, sa, AI_NUMERICHOST))
+ {
+ Send("Failed: convert to sockaddr_in failed\n");
+ }
+ else
+ {
+ std::string name;
+ if (!Utility::reverse( (struct sockaddr *)&sa, sizeof(sa), name))
+ {
+ Send("Failed: ipv4 reverse lookup of " + m_data + "\n");
+ }
+ else
+ {
+ Send("Name: " + name + "\n");
+ }
+ }
+ }
+ else
+#ifdef ENABLE_IPV6
+#ifdef IPPROTO_IPV6
+ if (Utility::isipv6( m_data ))
+ {
+ struct sockaddr_in6 sa;
+ if (!Utility::u2ip(m_data, sa, AI_NUMERICHOST))
+ {
+ Send("Failed: convert to sockaddr_in6 failed\n");
+ }
+ else
+ {
+ std::string name;
+ if (!Utility::reverse( (struct sockaddr *)&sa, sizeof(sa), name))
+ {
+ Send("Failed: ipv6 reverse lookup of " + m_data + "\n");
+ }
+ else
+ {
+ Send("Name: " + name + "\n");
+ }
+ }
+ }
+ else
+#endif
+#endif
+ {
+ Send("Failed: malformed address\n");
+ }
+ Send("\n");
+ }
+ else
+ {
+ std::string msg = "Unknown query type: " + m_query;
+ Handler().LogError(this, "OnDetached", 0, msg);
+ Send("Unknown\n\n");
+ }
+ SetCloseAndDelete();
+}
+
+
+void ResolvSocket::OnConnect()
+{
+ if (m_resolv_host.size())
+ {
+#ifdef ENABLE_IPV6
+ std::string msg = (m_resolve_ipv6 ? "gethostbyname2 " : "gethostbyname ") + m_resolv_host + "\n";
+ m_query = m_resolve_ipv6 ? "gethostbyname2" : "gethostbyname";
+#else
+ std::string msg = "gethostbyname " + m_resolv_host + "\n";
+ m_query = "gethostbyname";
+#endif
+ m_data = m_resolv_host;
+ Send( msg );
+ return;
+ }
+#ifdef ENABLE_IPV6
+ if (m_resolve_ipv6)
+ {
+ std::string tmp;
+ Utility::l2ip(m_resolv_address6, tmp);
+ m_query = "gethostbyaddr";
+ m_data = tmp;
+ std::string msg = "gethostbyaddr " + tmp + "\n";
+ Send( msg );
+ }
+#endif
+ std::string tmp;
+ Utility::l2ip(m_resolv_address, tmp);
+ m_query = "gethostbyaddr";
+ m_data = tmp;
+ std::string msg = "gethostbyaddr " + tmp + "\n";
+ Send( msg );
+}
+
+
+void ResolvSocket::OnDelete()
+{
+ if (m_parent)
+ {
+ if (Handler().Resolving(m_parent) || Handler().Valid(m_parent))
+ {
+ m_parent -> OnResolveFailed(m_resolv_id);
+ }
+ // update cache
+ if (!m_cached)
+ {
+ Lock lock(m_cache_mutex);
+ std::string value;
+DEB(fprintf(stderr, " *** Update cache for [%s][%s] = '%s'\n", m_query.c_str(), m_data.c_str(), value.c_str());)
+ m_cache[m_query][m_data] = value;
+ m_cache_to[m_query][m_data] = time(NULL);
+ }
+ m_parent = NULL;
+ }
+}
+
+
+#ifdef SOCKETS_NAMESPACE
+}
+#endif
+
+#endif // ENABLE_RESOLVER
+