[lwip-commits] [SCM] lwIP - A Lightweight TCPIP stack branch, master, updated. master_at_STABLE-2_0_0-1083-g50a5d85

[Joel Cunningham]

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- Log -----------------------------------------------------------------
commit 50a5d85f458f675165fabf0c2ced7c1e6dd2ae1c
Author: Joel Cunningham <address@hidden>
Date:   Fri Dec 15 12:15:35 2017 -0600

    tcp: handle segmentation oversize during segment split (bug #52676)
    
    This fixes a bug in tcp_split_unsent_seg where oversized segments were not
    handled during the split, leading to pcb->unsent_oversized and
    useg->oversize_left getting out of sync with the split segment
    
    This would result in over-writing the pbuf if another call to tcp_write()
    happened after the split, but before the remainder of the split was sent in
    tcp_output
    
    Now pcb->unsent_oversized is explicitly cleared (because the remainder at
    the tail is never oversized) and useg->oversized_left is cleared after it is
    trimmed
    
    This also updates the test_tcp_persist_split unit test to explicitly check 
for
    this case

-----------------------------------------------------------------------

Summary of changes:
 src/core/tcp_out.c       | 12 +++++++++
 test/unit/tcp/test_tcp.c | 66 ++++++++++++++++++++++++++++--------------------
 2 files changed, 51 insertions(+), 27 deletions(-)


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