[991] Pass Iface object to classes derived from PktFilter.

src/lib/dhcp/pkt_filter.h

@@ -20,6 +20,9 @@
 namespace isc {
 namespace dhcp {
 
+/// Forward declaration to the class representing interface
+class Iface;
+
 /// @brief Abstract packet handling class
 ///
 /// This class represents low level method to send and receive DHCP packet.
@@ -39,14 +42,14 @@ public:
 
     /// @brief Open socket.
     ///
-    /// @param interface name
+    /// @param iface interface descriptor
     /// @param addr address on the interface to be used to send packets.
     /// @param port port number.
     /// @param receive_bcast configure socket to receive broadcast messages
     /// @param send_bcast configure socket to send broadcast messages.
     ///
     /// @return created socket's descriptor
-    virtual int openSocket(const std::string& ifname,
+    virtual int openSocket(const Iface& iface,
                            const isc::asiolink::IOAddress& addr,
                            const uint16_t port,
                            const bool receive_bcast,

src/lib/dhcp/pkt_filter_inet.cc

@@ -21,8 +21,10 @@ namespace isc {
 namespace dhcp {
 
 int
-PktFilterInet::openSocket(const std::string& ifname, const isc::asiolink::IOAddress& addr,
-                          const uint16_t port, const bool receive_bcast,
+PktFilterInet::openSocket(const Iface& iface,
+                          const isc::asiolink::IOAddress& addr,
+                          const uint16_t port,
+                          const bool receive_bcast,
                           const bool send_bcast) {
 
     struct sockaddr_in addr4;
@@ -41,8 +43,8 @@ PktFilterInet::openSocket(const std::string& ifname, const isc::asiolink::IOAddr
 
     if (receive_bcast) {
         // Bind to device so as we receive traffic on a specific interface.
-        if (setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, ifname.c_str(),
-                       ifname.length() + 1) < 0) {
+        if (setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, iface.getName().c_str(),
+                       iface.getName().length() + 1) < 0) {
             close(sock);
             isc_throw(SocketConfigError, "Failed to set SO_BINDTODEVICE option"
                       << "on socket " << sock);

src/lib/dhcp/pkt_filter_inet.h

@@ -29,14 +29,14 @@ public:
 
     /// @brief Open socket.
     ///
-    /// @param interface name
+    /// @param iface interface descriptor
     /// @param addr address on the interface to be used to send packets.
     /// @param port port number.
     /// @param receive_bcast configure socket to receive broadcast messages
     /// @param send_bcast configure socket to send broadcast messages.
     ///
     /// @return created socket's descriptor
-    virtual int openSocket(const std::string& ifname,
+    virtual int openSocket(const Iface& iface,
                            const isc::asiolink::IOAddress& addr,
                            const uint16_t port,
                            const bool receive_bcast,

src/lib/dhcp/pkt_filter_lpf.cc

@@ -0,0 +1,33 @@
+// Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#include <config.h>
+#include <dhcp/iface_mgr.h>
+#include <dhcp/pkt4.h>
+#include <dhcp/pkt_filter_lpf.h>
+
+namespace isc {
+namespace dhcp {
+
+int
+PktFilterLPF::openSocket(const std::string& ifname, const isc::asiolink::IOAddress& addr,
+                          const uint16_t port, const bool receive_bcast,
+                          const bool send_bcast) {
+
+    return (-1);
+}
+
+
+} // end of isc::dhcp namespace
+} // end of isc namespace

src/lib/dhcp/pkt_filter_lpf.h

@@ -0,0 +1,61 @@
+// Copyright (C) 2013 Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#ifndef PKT_FILTER_LPF_H
+#define PKT_FILTER_LPF_H
+
+#include <dhcp/pkt_filter.h>
+
+namespace isc {
+namespace dhcp {
+
+/// @brief Packet handling class using Linux Packet Filtering
+///
+/// This class provides methods to send and recive packet using raw sockets
+/// and Linux Packet Filtering.
+class PktFilterLPF : public PktFilter {
+public:
+
+    /// @brief Open socket.
+    ///
+    /// @param interface name
+    /// @param addr address on the interface to be used to send packets.
+    /// @param port port number.
+    /// @param receive_bcast configure socket to receive broadcast messages
+    /// @param send_bcast configure socket to send broadcast messages.
+    ///
+    /// @return created socket's descriptor
+    virtual int openSocket(const std::string& ifname,
+                           const isc::asiolink::IOAddress& addr,
+                           const uint16_t port,
+                           const bool receive_bcast,
+                           const bool send_bcast);
+
+    /// @brief Receive packet over specified socket.
+    ///
+    /// @param sockfd descriptor of a socket to be used for packet reception
+    /// @param timeout_sec integral part of a timeout.
+    /// @param timeout_usec fractional part of a timeout (in microseconds).
+    ///
+    /// @return Received packet
+    Pkt4Ptr receive(uint16_t sockfd, uint32_t timeout_sec,
+                    uint32_t timeout_usec = 0);
+
+    //    bool send(const Pkt4Ptr& pkt) = 0;
+};
+
+} // namespace isc::dhcp
+} // namespace isc
+
+#endif // PKT_FILTER_LPF_H