libssh2_channel_direct_tcpip(3) on Linux
The text 3a67560c5846, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy) shipped it.
convenience macro for libssh2_channel_direct_tcpip_ex(3) calls