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[lwip-devel] [bug #61449] Incoherent tot_len field in etharp_update_arp_

From: Jean-Chriostophe MATHAE
Subject: [lwip-devel] [bug #61449] Incoherent tot_len field in etharp_update_arp_entry output
Date: Tue, 9 Nov 2021 05:44:23 -0500 (EST)
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0


                 Summary: Incoherent tot_len field in etharp_update_arp_entry
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: jchmathae
            Submitted on: mar. 09 nov. 2021 10:44:22 UTC
                Category: ARP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.1.1




In lwIP version 2.1.2, in a call to netif_linkoutput() from
etharp_update_arp_entry()/ethernet_output() the 'pbuf' structure passed as
second argument has an incoherence in its 'tot_len' field: it has a value of
54, its 'len' field has a value of 42 and the 'next->len' field has a value of
50 ('next->tot_len' if also 50).


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