99 lines
4.0 KiB
C
99 lines
4.0 KiB
C
/****************************************************************************
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* net/udp/udp_forward.c
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/netdev.h>
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#include <nuttx/net/ip.h>
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#include "devif/ip_forward.h"
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#include "udp/udp.h"
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#if defined(CONFIG_NET) && defined(CONFIG_NET_IPFORWARD) && defined(CONFIG_NET_UDP)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: udp_ipv6_dev_forward
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*
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* Description:
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* Called by the IP forwarding logic when an UDP packet is received on
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* one network device, but must be forwarded on another network device.
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*
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* Set up to forward the UDP packet on the specified device. This
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* function will set up a send "interrupt" handler that will perform the
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* actual send asynchronously and must return without waiting for the
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* send to complete.
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*
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* Input Parameters:
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* fwd - An initialized instance of the common forwarding structure that
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* includes everything needed to perform the forwarding operation.
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*
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* Returned Value:
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* Zero is returned if the packet was successfully forwarded; A negated
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* errno value is returned if the packet is not forwardable. In that
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* latter case, the caller should free the IOB list and drop the packet.
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*
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****************************************************************************/
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#if defined(CONFIG_NET_IPv6) && defined(CONFIG_NETDEV_MULTINIC)
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int udp_ipv6_dev_forward(FAR struct forward_s *fwd)
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{
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/* Set up to send the packet when the selected device polls for TX data. */
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/* Notify the forwarding device that TX data is available */
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#warning Missing logic
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/* REVISIT: For Ethernet we may have to fix up the Ethernet header:
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* - source MAC, the MAC of the current device.
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* - dest MAC, the MAC associated with the destination IPv6 adress.
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* This will involve ICMPv6 and Neighbor Discovery.
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*/
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nwarn("WARNING: UPD/ICMPv6 packet forwarding not yet supported\n");
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return -ENOSYS;
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}
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#endif /* CONFIG_NET_IPv6 && CONFIG_NETDEV_MULTINIC */
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#endif /* CONFIG_NET && CONFIG_NET_IPFORWARD && CONFIG_NET_UDP */
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