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.
Merged in merlin17/nuttx/mac802154-sock (pull request #479)
wireless/ieee802154: Adds support for receiving MAC events via IOCTL through socket interface. Other small fixes and cleanup
* ioctl: Cleans up MAC802154IOC values
* wireless/ieee802154: Cleans up MAC802154IOC_NOTIFY_REGISTER logic in character driver
* wireless/ieee802154/mac802154_netdev: Adds support for MAC event notification via IOCTL
* wireless/ieee802154/mac802154: Changes reset logic. No longer reset extended address.
* wireless/ieee802154: Cleans up MAC802154IOC logic
Moves MAC802154IOC from ieee802154_ioctl.h and renames ieee802154_ioctl.h to ieee802154_device.h since it only contains types relevant to the MAC char device now.
* wireless/ieee802154/mac802154_device: Cleans up IOCTL logic for recent changes.
* drivers/wireless/ieee802154/mrf24j40: Adds missing break in case statement
* wireless/ieee802154/mac802154_netdev: Starts adding support for passing MAC events via IOCTL
* wireless/ieee802154/mac802154: Fixes issue with receiver enable logic
* wireless/ieee802154/mac802154: Fixes issue where extended address is cleared and not rewritten after radio reset
* configs/clicker2-stm32/mrf24j40-mac: Enables RAMLOG and wireless driver logging
* wireless/ieee802154/mac802154: Fixes poll logic meant to automatically choose address mode based on short address range.
Approved-by: Gregory Nutt <gnutt@nuttx.org>
commit 69fcf3e849
Author: Alan Carvalho de Assis <acassis@gmail.com>
Date: Sun Jul 16 08:39:33 2017 -0600
Fix spark/stm32_composite.c: board_composite_connect cannot be static
commit 28eb253401
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sun Jul 16 08:36:01 2017 -0600
Composite: Final review for coding style before merge
commit e6af1b9994
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sun Jul 16 07:41:38 2017 -0600
Composite: Simplify some intiialization of data structures.
commit 771c367411
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sun Jul 16 07:15:08 2017 -0600
Cosmetic changes to alignment.
commit 5d67ddda4e
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sun Jul 16 07:00:48 2017 -0600
USBMSC: Add missing logic to saved device description.
commit 0729151d29
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 17:11:41 2017 -0600
Trivial, costmetic
commit 74b916ff84
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 14:50:29 2017 -0600
Composite: Private functions need to be marked static. Move static functions out of 'Public Functions' to 'Private Functions' where they belong. Disable composite configuration 1 in all STM32 F1 configurations.
commit cfaa4ece13
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 13:20:34 2017 -0600
Add some comments.
commit 8143563be6
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 12:33:10 2017 -0600
Spark: Need to condition out MSC logic in composite setup if there is no MSC in the composite.
commit 69d3a91ef1
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 11:03:33 2017 -0600
Composite: Remove all dependencies on CONFIG_SYSTEM_COMPOSITE_* configuration settings. Nothing in the OS can depend on external application settings.
commit 55a4388bbd
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 09:59:31 2017 -0600
All composite configurations now also support a dual CDC/ACM configuration.
commit 428f2147af
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 09:24:32 2017 -0600
Composite: Move board_msc* interfaces from apps/system/composite to the board specific OS logic where they belong.
commit f1cc168a5c
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 08:56:33 2017 -0600
Refresh all composite configurations.
commit 246afcaa10
Merge: 919877191d02c6672868
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 08:22:26 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 919877191d
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jul 15 08:20:02 2017 -0600
Composite setup: Remove useless board_cdc* wrapper.
commit 82129cf8c6
Merge: f2cb8b252a6537e4ea20
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jul 14 16:23:57 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit f2cb8b252a
Author: Alan Carvalho de Assis <acassis@gmail.com>
Date: Fri Jul 14 10:19:35 2017 -0600
Composite: Fix for another cloned typo.
commit 676cfd526a
Author: Alan Carvalho de Assis <acassis@gmail.com>
Date: Fri Jul 14 09:11:37 2017 -0600
Composite: Fix some typos
commit 1ea0368c18
Author: Alan Carvalho de Assis <acassis@gmail.com>
Date: Fri Jul 14 09:10:18 2017 -0600
Composite: ./stm3210e-eval/src/stm32_composite.c
commit e485caced9
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jul 14 09:08:17 2017 -0600
Composite: I don't think the original code should have forced minor=0.
commit 6443c29621
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jul 14 07:15:38 2017 -0600
Composite: Flesh out support for all of other configurations that support composite.
commit 23cbc28b05
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jul 14 06:59:45 2017 -0600
Detangle use of board_xyzclassobject() and board_xyzuninitialize()
commit 1674cb8c8e
Merge: 6bc881a1925033a6def7
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jul 13 13:57:40 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 6bc881a192
Merge: fe3af4941d85b8d16d8c
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Tue Jul 11 12:24:07 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit fe3af4941d
Merge: 0f9ad16e181bc0eea143
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Mon Jul 10 11:07:36 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 0f9ad16e18
Merge: a4cd90d4efaa2e9c15a5
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jul 7 20:26:53 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit a4cd90d4ef
Merge: 8a4be7175e31f832d8c5
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Wed Jul 5 11:12:52 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 8a4be7175e
Merge: 18a32ed2caae1771454a
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jun 30 16:14:04 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 18a32ed2ca
Merge: aaa81ce4976d8df90b79
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 29 10:18:16 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit aaa81ce497
Merge: 4eb548226b8cb4636bb1
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Mon Jun 26 11:56:11 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 4eb548226b
Merge: 2327f5a1b4dc8eec0b61
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Mon Jun 19 17:27:00 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 2327f5a1b4
Merge: 49cd279fc699bf0b522b
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jun 16 17:30:03 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 49cd279fc6
Merge: bb6a13f30a46f86982ee
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Wed Jun 14 09:17:49 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit bb6a13f30a
Merge: 918480047aac93d4bda9
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Mon Jun 5 17:40:06 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 918480047a
Merge: e4d262436c4526cd665e
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Sat Jun 3 08:52:31 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit e4d262436c
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jun 2 07:19:27 2017 -0600
SAMV71-Xult Composite: Now can switch between two different composite configurations dynamically.
commit 815257743d
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Fri Jun 2 07:11:57 2017 -0600
usbdev composite and SAMV7-Xult: Move board-specific USB composite configuration out of boardctl.c and into board-specific logic where it belongs. Add a configuration option to the boardctl() calls to support multiple composite device configurations dynamically.
commit ac13619dc5
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 17:03:58 2017 -0600
Cosmetic
commit 9dd41bdd2f
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 17:02:43 2017 -0600
Composite: More compile-related fixes
commit fc1438c95d
Merge: 049ccbfcbeff2b54a5e0
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 16:35:41 2017 -0600
Merge remote-tracking branch 'origin/master' into composite
commit 049ccbfcbe
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 16:35:16 2017 -0600
Composite: Add some structure definitions missed in first application of the patch.
commit ef33329e3a
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 16:14:46 2017 -0600
Add a warning
commit 89f77cd91a
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 16:11:27 2017 -0600
Fix some incomplete name changes
commit 0bb7af549a
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 15:09:50 2017 -0600
It is unnecessary to pack a structure that consists only of uint8_t data fields.
commit bd9b548914
Author: Gregory Nutt <gnutt@nuttx.org>
Date: Thu Jun 1 15:05:41 2017 -0600
Remove COMPILE_TIME_ASSERTION
commit 7e6f481581
Author: Frank Benkert <Frank.Benkert@avat.de>
Date: Thu Jun 1 14:58:04 2017 -0600
Part II of the same big commit
commit dcc9b07715
Author: Frank Benkert <Frank.Benkert@avat.de>
Date: Thu Jun 1 14:08:22 2017 -0600
[[This is part 1 or several commits]]
We developed a huge Changeset over a year ago to make USB Composite configuration dynamical and be able to instanciate the CDCACM multiple times inside this device. We use this feature to switch between one in normal and up to three CDCACMs in maintenance boot.
The control path starts in “boardctl.c” where the configuration for the device is constructed. There are still a few issues which I’ll ask you to have a look at before this beast can be merged.
1. To be able to construct the data dynamically I have changed some USB-Structs to be packed. Maybe there are additional structs to change (just for completeness – not for current functionality).
2. I’ve added the Macro “COMPILE_TIME_ASSERTION” two times (in usbmsc_desc.c and in cdcacm_desc.c) to stay private. Maybe you’ll find a better place. It’s used to check the size of the structs against the assumptions.
3. I’ve changed the interface for some USB-Functions to receive also the dynamic configuration. Maybe this can be done more elegant.
4. The original NuttX (without the patch) seems to have problems with a Composite device holding a CDCACM and an MSC. The “USB SET CONFIGURATION” request does not to work at all. This makes the test fail under Windows and under Linux. Applying this patch doesn’t change anything – because it only changes the configuration – not the behavior. Maybe you’ll have a look at this problem before applying the patch.
Entropy pool gathers environmental noise from device drivers, user-space, etc., and returns good random numbers, suitable for cryptographic use. Based on entropy pool design from *BSDs and uses BLAKE2Xs algorithm for CSPRNG output.
Patch also adds /dev/urandom support for using entropy pool RNG and new 'getrandom' system call for getting randomness without file-descriptor usage (thus avoiding file-descriptor exhaustion attacks). The 'getrandom' interface is similar as 'getentropy' and 'getrandom' available on OpenBSD and Linux respectively.
