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Gregory Nutt 44d88abb83 This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. 
There are two issues with it however:

1. Reading from file system on a per packet basis could be slow.  I think it probably should have a small, in-memory cache of most frequently used routes for good problem.

2. Currently the delroute logic is disabled due to a problem with the design.  NuttX does not currently support truncate().  Therefore, it is not possible to delete entries from the routing table file.

In this current implementation, that leaves the last entry intact at the end of the file.  An alternative design might include a tag on each record to indicate if the record is valid or not.  That would work but would add complexity to the other routing table functions.

The existing implementation is available for testing purposes only if CONFIG_EXPERIMENTAL=y.

Squashed commit of the following:

    net/route:  The current delroute design depends on file truncation.  However, NuttX does not currently support truncate.  Alternative, more complex designs are possible but not implemented.  At present the file routing table are otherwise functional but the delroute logic is disabled via CONFIG_EXPERIMENTAL.  Enable it only if you plan to fix it.

    net/route:  Fix some issues with locking routing table files.

    net/route:  Add partial implementation of delroute for the case where the routing table is in a file.

    net/route:  Add support for seeking to positions in the routing table.

    net/route: Add net_addroute_ipv4/6() using a file-based routing table.

    net/route: Add net_foreach_ipv4/4() using a file-based routing table.

    net/route:  Initial build, configuration, and fs utilies to support routing tables in a file.
2017-09-29 08:33:36 -06:00
..
arp net/arp/arp_out.c: Fix IGMP Ethernet address computation 2017-09-28 07:50:52 -06:00
devif 6LoWPAN: The original, Contiki-based design used only a single buffer for reassemblying larger packets. This could be a problem issue for hub configurations which really need the capability concurrently reassemble multiple incoming streams concurrently. These was also a design issue in that the reassembly buffer could be corrupted by outgoing packets. The design was extended to support multiple reassembly buffers, each associated with the reassembly tag and source address. This assures that there can be be no corruption of the reassembly once it has started. 2017-08-26 10:00:47 -06:00
icmp Networking: A little more wording changes related to interrupts vs. events 2017-08-29 15:08:38 -06:00
icmpv6 From b7b1826930c7da10416bceebce5d63dc8e4086ca Mon Sep 17 00:00:00 2001 2017-09-24 06:33:05 -06:00
ieee802154 :Remove CONFIG_NET_6LOWPAN_FRAMELEN. In this case where multiple radios are support3d, this may not be a constant. 6LoWPAN now always queries the driver to get the maximum frame length. 2017-09-10 11:40:54 -06:00
igmp net/igmp/igmp_send.c: Fix incoming IGMP checksum calculation 2017-09-25 06:55:01 -06:00
inet Networking: IPv4 getsockname(): Fix a typo that can cause a compile error. 2017-09-19 10:52:01 -06:00
ipforward Networking: Clean up some naming that has bothered me for a long time... There are no interrupts and no interrupt handlers in the network. There are events and event handler (there used to to be interrupt logic in there years ago but that is long, long gone). 2017-08-29 14:08:04 -06:00
local net/local: fix server lc_waitsem overflow 2017-09-01 07:47:29 -06:00
loopback Fix IPv6 loopback driver that depended on the removed g_ipv6_allonesaddr. Noted by Masayuki Ishikawa 2017-08-09 06:59:55 -06:00
neighbor Networking: Fix netdev_dev_lladdrsize. In some configurations, it could return the wrong size for the address of a packet radio. 2017-08-08 16:27:23 -06:00
netdev Addes support for read-only routing tables. Prior to this change, routing tables were only support in RAM and had to be initialized with explicit logic to add the necessary routes to the routing table. With this change, routes may be defined in the pre-initialized, read-only routing table provided by the board-specific logic 2017-09-28 09:04:31 -06:00
pkt Update net_timedwait() and net_lockedwait() call sites to handle negated errno in return value 2017-09-04 07:56:51 -06:00
procfs Trivial fix in some comments. 2017-09-20 10:06:26 -06:00
route This commit adds support for routing tables in files in a file system. This might be useful for customized, per-unit routing tables. 2017-09-29 08:33:36 -06:00
sixlowpan :Remove CONFIG_NET_6LOWPAN_FRAMELEN. In this case where multiple radios are support3d, this may not be a constant. 6LoWPAN now always queries the driver to get the maximum frame length. 2017-09-10 11:40:54 -06:00
socket Fixes for problems found by Coverity in the nuttx repository: 2017-09-25 07:17:09 -06:00
tcp fs/vfs: file_read() is an internal OS interface and should not errors via the errno 2017-09-28 14:14:32 -06:00
udp UDP Networking: Fix unitialized variable problem found by Coverity 2017-09-13 12:12:57 -06:00
usrsock Update net_timedwait() and net_lockedwait() call sites to handle negated errno in return value 2017-09-04 07:56:51 -06:00
utils Fix net_lock returning ERROR when instead of real error code on failure. 2017-09-01 07:18:16 -06:00
.gitignore .dSYM only needs to be in the same .gitignore files as .exe 2013-05-30 15:02:04 -06:00
Kconfig Squashed commit of the following: 2017-08-20 11:14:43 -06:00
Makefile Squashed commit of the following: 2017-08-19 08:48:52 -06:00
net_initialize.c Addes support for read-only routing tables. Prior to this change, routing tables were only support in RAM and had to be initialized with explicit logic to add the necessary routes to the routing table. With this change, routes may be defined in the pre-initialized, read-only routing table provided by the board-specific logic 2017-09-28 09:04:31 -06:00
README.txt Squashed commit of the following: 2017-08-19 08:48:52 -06:00

README.txt 

README
======

Directory Structure
===================

  nuttx/
   |
   `- net/
       |
       +- arp        - Address resolution protocol (IPv4)
       +- devif      - Stack/device interface layer
       +- icmp       - Internet Control Message Protocol (IPv4)
       +- icmpv6     - Internet Control Message Protocol (IPv6)
       +- ieee802154 - PF_IEEE802154 socket interface
       +- inet       - PF_INET/PF_INET6 socket interface
       +- ipforward  - IP forwarding logic
       +- local      - Unix domain (local) sockets
       +- loopback   - Local loopback
       +- neighbor   - Neighbor Discovery Protocol (IPv6)
       +- netdev     - Socket network device interface
       +- pkt        - "Raw" packet socket support
       +- sixlowpan  - 6LoWPAN implementation
       +- socket     - BSD socket interface
       +- route      - Routing table support
       +- tcp        - Transmission Control Protocol
       +- udp        - User Datagram Protocol
       +- usrsock    - User socket API for user-space networking stack
       `- utils      - Miscellaneous utility functions


    +-------------------------------------------------------------------++------------------------+
    |                     Application layer                             || usrsock daemon         |
    +-------------------------------------------------------------------++------------------------+
    +-------------------------------------------------------------------++----------------+ +-----+
    |                   Socket layer (socket/)                          || /dev/usrsock   | |     |
    +-------------------------------------------------------------------++----------------+ |     |
    +------------++--------------------------------------------------++-------------------+ |     |
    |  Network   || Protocol stacks (arp, ipv6, icmp, pkt, tcp, udp) || usrsock/          | |     |
    |   Device   |+--------------------------------------------------++-------------------+ |     |
    | Interface  |+------------------------------------++---------------------------------+ |     |
    | (netdev/)  ||  Network Device Interface (devif/) || Utilities                       | |     |
    +------------++------------------------------------++---------------------------------+ |     |
    +----------------------------------------------------------------+                      |     |
    |                    Network Device Drivers                      |                      | HAL |
    +----------------------------------------------------------------+                      +-----+
    +----------------------------------------------------------------+ +--------------------------+
    |                    Networking Hardware                         | |  Hardware TCP/IP Stack   |
    +----------------------------------------------------------------+ +--------------------------+