Commit Graph

14 Commits

Author SHA1 Message Date
Alin Jerpelea
67d02a45eb net: migrate to SPDX identifier
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2024-09-12 01:08:11 +08:00
Zhe Weng
2a780e0467 net/ipfwd: fix devif_forward after IOB offload.
Problem:
- `iob_copyout` to `d_buf` doesn't set `io_len` of the IOB, so `devif_poll` failed to copy the data into `buf` by `iob_copyout`

Modification:
- Just Move the IOB in `devif_forward`.

Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
2022-12-06 17:03:47 +08:00
Alin Jerpelea
37d5c1b0d9 net: Author Gregory Nutt: update licenses to Apache
Gregory Nutt has submitted the SGA and we can migrate the licenses
 to Apache.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2021-02-20 00:38:18 -08:00
Gregory Nutt
22cd0d47fa This commit attempts remove some long standard confusion in naming and some actual problems that result from the naming confusion. The basic problem is the standard MTU does not include the size of the Ethernet header. For clarity, I changed the naming of most things called MTU to PKTSIZE. For example, CONFIG_NET_ETH_MTU is now CONFIG_NET_ETH_PKTSIZE.
This makes the user interface a little hostile.  People thing of an MTU of 1500 bytes, but the corresponding packet is really 1514 bytes (including the 14 byte Ethernet header).  A more friendly solution would configure the MTU (as before), but then derive the packet buffer size by adding the MAC header length.  Instead, we define the packet buffer size then derive the MTU.

The MTU is not common currency in networking.  On the wire, the only real issue is the MSS which is derived from MTU by subtracting the IP header and TCP header sizes (for the case of TCP).  Now it is derived for the PKTSIZE by subtracting the IP header, the TCP header, and the MAC header sizes.  So we should be all good and without the recurring 14 byte error in MTU's and MSS's.

Squashed commit of the following:

    Trivial update to fix some spacing issues.
    net/: Rename several macros containing _MTU to _PKTSIZE.
    net/: Rename CONFIG_NET_SLIP_MTU to CONFIG_NET_SLIP_PKTSIZE and similarly for CONFIG_NET_TUN_MTU.  These are not the MTU which does not include the size of the link layer header.  These are the full size of the packet buffer memory (minus any GUARD bytes).
    net/: Rename CONFIG_NET_6LOWPAN_MTU to CONFIG_NET_6LOWPAN_PKTSIZE and similarly for CONFIG_NET_TUN_MTU.  These are not the MTU which does not include the size of the link layer header.  These are the full size of the packet buffer memory (minus any GUARD bytes).
    net/: Rename CONFIG_NET_ETH_MTU to CONFIG_NET_ETH_PKTSIZE.  This is not the MTU which does not include the size of the link layer header.  This is the full size of the packet buffer memory (minus any GUARD bytes).
    net/: Rename the file d_mtu in the network driver structure to d_pktsize.  That value saved there is not the MTU.  The packetsize is the memory large enough to hold the maximum packet PLUS the size of the link layer header.  The MTU does not include the link layer header.
2018-07-04 14:10:40 -06:00
Anthony Merlino
2b4f0b4a25 Merged in antmerlino/nuttx/ipfwd-remove-redundant-llheadersize (pull request #548)
net/devif: Do not add link layer header size to d_len inside devif_forward().

Approved-by: Gregory Nutt <gnutt@nuttx.org>
2017-11-29 00:54:17 +00:00
Gregory Nutt
6c4405561a Fix a few compile errors and warnings found in build testing 2017-08-12 10:27:55 -06:00
Gregory Nutt
bd7c84b23e Remove CONFIG_NETDEV_MULTINIC. This increases code size by a little, but greatly reduces the complexity of the network code. 2017-08-08 14:24:12 -06:00
Gregory Nutt
2d3e651cbb IP forwarding: Remove some unnecessary data structure definitions. 2017-07-07 21:32:10 -06:00
Gregory Nutt
aa2e9c15a5 IP forwarding: Major rearchitecting of the outgoing portion of the IP forwarding logic necessary into to properly received device-related forwarding events. 2017-07-07 20:19:26 -06:00
Gregory Nutt
803235ad4b IP forwaring: Rename some files to get closer to other naming conventions. 2017-07-07 18:45:58 -06:00
Gregory Nutt
7258f1cbfc IP forwarding: Move to separate directory. A few fixes from early testing; In TUN driver, do all polling on worker thread. Otherwise, the stack gets very deep. 2017-07-07 18:33:06 -06:00
Gregory Nutt
db69e4b09c Another IP forwarding design simplification: Remove an unnecessary field from state structure. 2017-07-06 16:51:08 -06:00
Gregory Nutt
b5d7187df6 IP forwarding design simplication; might save some memory. Also fix some compile issues introduce with last commit in MULTINIC configration. 2017-07-06 16:19:10 -06:00
Gregory Nutt
31f832d8c5 IP forwarding: Flesh out TCP, UDP, and ICMPv6 packet forwarding logic. 2017-07-05 11:01:16 -06:00