(nuttx) branch master updated: sixlowpan: improve tcp support.

[acassis]

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acassis pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new 34aa17b7a0 sixlowpan: improve tcp support.
34aa17b7a0 is described below

commit 34aa17b7a06fb53ab4fc68b523450aa9f3517ab9
Author: Laczen JMS <laczen...@gmail.com>
AuthorDate: Thu Feb 20 09:27:59 2025 +0100

    sixlowpan: improve tcp support.
    
    Update the handling of tcp packets over sixlowpan. `tcp_ipv6_input()`
    can update the dev->d_iob. Assigning ipv6 to IPv6BUF makes sure that
    the correct buffer is used.
    
    Signed-off-by: Laczen JMS <laczen...@gmail.com>
---
 net/devif/ipv6_input.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/devif/ipv6_input.c b/net/devif/ipv6_input.c
index 6216c9d1e0..af9d9cdbee 100644
--- a/net/devif/ipv6_input.c
+++ b/net/devif/ipv6_input.c
@@ -463,6 +463,12 @@ static int ipv6_in(FAR struct net_driver_s *dev)
         if ((dev->d_len > 0 && dev->d_lltype == NET_LL_IEEE802154) ||
             (dev->d_len > 0 && dev->d_lltype == NET_LL_PKTRADIO))
           {
+            /* tcp_ipv6_input() can update dev->d_iob. Update ipv6 to ensure
+             * using the correct data.
+             */
+
+            ipv6 = IPv6BUF;
+
             /* Let 6LoWPAN handle the TCP output */
 
             sixlowpan_tcp_send(dev, dev, ipv6);