libdill: Structured Concurrency for C

NAME

tls_detach - terminates TLS protocol and returns the underlying socket

SYNOPSIS

#include <libdill.h>

int tls_detach(
    int s,
    int64_t deadline);

DESCRIPTION

WARNING: This is experimental functionality and the API may change in the future.

TLS is a cryptographic protocol to provide secure communication over the network. It is a bytestream protocol.

This function does the terminal handshake and returns underlying socket to the user. The socket is closed even in the case of error.

s: Handle of the TLS socket.

deadline: A point in time when the operation should time out, in milliseconds. Use the now function to get your current point in time. 0 means immediate timeout, i.e., perform the operation if possible or return without blocking if not. -1 means no deadline, i.e., the call will block forever if the operation cannot be performed.

This function is not available if libdill is compiled with --disable-sockets option.

This function is not available if libdill is compiled without --enable-tls option.

RETURN VALUE

In case of success the function returns underlying socket handle. In case of error it returns -1 and sets errno to one of the values below.

ERRORS

EBADF: Invalid handle.
ECANCELED: Current coroutine was canceled.
ECONNRESET: Broken connection.
ENOTSUP: The handle is not a TLS protocol handle.
ETIMEDOUT: Deadline was reached.

EXAMPLE

int s = tcp_connect(&addr, -1);
s = tls_attach_client(s, -1);
bsend(s, "ABC", 3, -1);
char buf[3];
ssize_t sz = brecv(s, buf, sizeof(buf), -1);
s = tls_detach(s, -1);
tcp_close(s);