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sendf.c: Makes further attempts at updateconninfo if first failed #1847

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sendf.c: Makes further attempts at updateconninfo if first failed #1847

wants to merge 1 commit into from

Commits on Sep 15, 2017

  1. sendf.c: Makes further attempts at updateconninfo if first failed 

    When using non-blocking sockets, such as TCP Fast Open sockets,
connection information may not be available at the time the
socket is "created". For TCP Fast Open, the creation can even be
a NOP as far as the network is concerned.

This change adds tests to the Curl_send and Curl_recv functions
to make further attempts at updating the connection information
for as long as local_port in the connectdata struct is zero.

Once a call to Curl_updateconninfo has succeeded, and so updated
the local_port field, there will be no further calls to
Curl_updateconninfo.

Closes: curl#1332
    @irl
    irl committed Sep 15, 2017
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