1 Topic by da

(1 replies, posted in wolfSSL)

hello

i have a c++ app that connects to another machine and (rarely) gets sigpipe, which is bad since i want the app to keep running and try again later
the stacktrace looks like this:
wolfSSL_write ->
SendData ->
SendBuffered.part.0 ->
EmbedSend ->
"../sysdeps/unix/sysv/linux/send.c", line 23, in __libc_send ->
"../sysdeps/unix/sysv/linux/send.c", line 28, in __libc_disable_asynccancel

i assume that the other machine disconnects between the app checking the validity of the connection and wolfSSL_write
obviously, i can make a signal handler that throws an exception on sigpipe and then catches the exception outside wolfSSL_write
but i am curious whether i can make a signal handler that ignores the sigpipe, and then just continue with the wolfSSL_write
i assume wolfSSL_write should return -1, and then i would get the exact error with wolfSSL_get_error

my questions are
1. did i understand correctly that on sigpipe while writing, although sigpipe is raised, wolfssl will return -1?
2. what is the error i would receive from wolfSSL_get_error in this case?

thank you

Go to forum: wolfSSL

2 Topic by da

(1 replies, posted in wolfSSL)

i have a c++ single-threaded app that uses wolfssl c library for the tls
the app receives data on existing connections and constantly closes and creates new connections
i have benchmarked the app and noticed that the 

wolfSSL_connect

function takes about 400 microseconds (btw i have setup the library to not check certificates), which means my messages get delayed by up to 400 microseconds, i create a lot of new connections which means a lot of spikes
i have lightly gone over the code in wolfssl and i have seen a lot of situations where there is a switch with cases like:

TLS_ASYNC_BEGIN
TLS_ASYNC_BUILD
TLS_ASYNC_DO
TLS_ASYNC_VERIFY
TLS_ASYNC_FINALIZE

between them there is 

FALL_THROUGH;

what i want is to remove the fallthrough or to return so that the wolfssl function is basically broken into multiple pieces, which might only cause 50 microseconds (or even less)
i would then have to call it more times and it obviously take longer to create a new connection, but i don't care because it would not impact the latency of the messages of my existing connection
---
it seems like a big undertaking though, and i would like some help/advice
is there an easy solution for what i want that i am just not seeing?
if not:
is there some documentation specifically for this case?
what are the things that i should watch out for?
is there some specific approach that i should take?
thank you in advance

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