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I have used bufferevent to send data to
socket
the application use variable length message, the first 4 bytes in message
is the length
all thing is OK but for socket reconnect
if the socket is closed by peer and my app reconnect
peer may receive the wrong msg, the message length is
wrong
it seems the unsent data in bufferevent's output buffer will be send when
the socket reconnect
but the message boundary is broken in output buffer
I guess it is because when I write message use bufferevent_write, one
message is splited into two chunks in output buffer
one chunk is send to peer before socket closed
and the next chunk is sent to peer after socket reconnect, so the
message is broken
if it is true, can I get the data from output buffer and find the next
message begin in data
so I can discard the broken message and send the message follow
it
but I find I can't get the data from output buffer, the evbuffer_copyout
function return -1
and I can't find the function to clear the output buffer to discard all
message in buffer
the only thing I can do is to free the bufferevent and create a new
bufferevent when reconnect socket
is it the right way to do such thing?
Thank you!
2015-01-16
slump
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