[PATCH 0/3] *** [#3619] socket.recvfrom crops UDP packets ***

[Alexander Turenko <alexander.turenko@tarantool.org>]

Hi!

Vladimir, please review the patchset.

Yaroslav, please confirm that the new behaviour is one you want.

The changes in short:

* evaluate buffer size for a UDP socket in recv / recvfrom when it was
  not passed;
* discard a datagram in recv / recvfrom when it is larger then the input
  buffer, when the size was passed;
* prevent defererence of a pointer to non-initialized data in case of
  recvfrom was called for a TCP socket.

WBR, Alexander Turenko.

branch: Totktonada/gh-3619-socket-recvfrom-detect-a-cropped-packet
travis-ci: https://travis-ci.org/tarantool/tarantool/builds/419931085
issue: https://github.com/tarantool/tarantool/issues/3619

Alexander Turenko (3):
  socket: evaluate buffer size in recv / recvfrom
  socket: don't truncate a datagram in recv/recvfrom
  socket: prevent recvfrom from returning garbage

 src/lua/socket.c         |  25 ++
 src/lua/socket.lua       |  84 +++++-
 test/app/socket.result   | 540 ++++++++++++++++++++++++++++++++++++++-
 test/app/socket.test.lua | 198 ++++++++++++++
 4 files changed, 842 insertions(+), 5 deletions(-)

-- 
2.17.1