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TLS_ACCEPT_SOCKET(3) Library Functions Manual TLS_ACCEPT_SOCKET(3)

tls_accept_socket, tls_accept_fds, tls_accept_cbsaccept an incoming client connection in a TLS server

#include <tls.h>

tls_accept_socket(struct tls *tls, struct tls **cctx, int socket);

tls_accept_fds(struct tls *tls, struct tls **cctx, int fd_read, int fd_write);

tls_accept_cbs(struct tls *tls, struct tls **cctx, ssize_t (*tls_read_cb)(struct tls *ctx, void *buf, size_t buflen, void *cb_arg), ssize_t (*tls_write_cb)(struct tls *ctx, const void *buf, size_t buflen, void *cb_arg), void *cb_arg);

After creating a TLS server context tls with tls_server(3) and configuring it with tls_configure(3), a server can accept a new client connection by calling () on an already established socket connection.

Alternatively, a new client connection can be accepted over a pair of existing file descriptors by calling ().

Calling () allows read and write callback functions to handle data transfers. The specified cb_arg parameter is passed back to the functions, and can contain a pointer to any caller-specified data.

All these functions create a new context suitable for reading and writing and return it in *cctx.

These functions return 0 on success or -1 on error.

tls_close(3), tls_config_set_session_id(3), tls_configure(3), tls_connect(3), tls_init(3), tls_server(3)

tls_accept_socket() appeared in OpenBSD 5.6 and got its final name in OpenBSD 5.7.

tls_accept_fds() appeared in OpenBSD 5.8 and tls_accept_cbs() in OpenBSD 6.1.

Joel Sing <>

tls_accept_cbs() was written by Tobias Pape <>.

May 26, 2018 OpenBSD-7.3