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NAMEBIO_socket, BIO_connect, BIO_listen, BIO_accept_ex, BIO_closesocket - BIO socket communication setup routines
#include <openssl/bio.h> int BIO_socket(int domain, int socktype, int protocol, int options); int BIO_connect(int sock, const BIO_ADDR *addr, int options); int BIO_listen(int sock, const BIO_ADDR *addr, int options); int BIO_accept_ex(int accept_sock, BIO_ADDR *peer, int options); int BIO_closesocket(int sock);
DESCRIPTIONBIO_socket() creates a socket in the domain domain, of type socktype and protocol. Socket options are currently unused, but is present for future use.
BIO_connect() connects sock to the address and service given by addr. Connection options may be zero or any combination of
BIO_listen() has sock start listening on the address and service given by addr. Connection options may be zero or any combination of
BIO_accept_ex() waits for an incoming connections on the given socket accept_sock. When it gets a connection, the address and port of the peer gets stored in peer if that one is non-NULL. Accept options may be zero or
BIO_closesocket() closes sock.
- Enables regular sending of keep-alive messages.
- Sets the socket to non-blocking mode.
Corresponds to TCP_NODELAY, and disables the Nagle algorithm. With this set, any data will be sent as soon as possible instead of being buffered until there's enough for the socket to send out in one go.
- Try to reuse the address and port combination for a recently closed port.
- When creating an IPv6 socket, make it only listen for IPv6 addresses and not IPv4 addresses mapped to IPv6.
These flags are bit flags, so they are to be combined with the "|" operator, for example:
BIO_connect(sock, addr, BIO_SOCK_KEEPALIVE | BIO_SOCK_NONBLOCK);
RETURN VALUESBIO_socket() returns the socket number on success or
BIO_connect() and BIO_listen() return 1 on success or 0 on error. When an error has occurred, the OpenSSL error stack will hold the error data and errno has the system error.
BIO_accept_ex() returns the accepted socket on success or
HISTORYBIO_gethostname(), BIO_get_port(), BIO_get_host_ip(), BIO_get_accept_socket() and BIO_accept() are deprecated since OpenSSL 1.1. Use the functions described above instead.
COPYRIGHTCopyright 2016 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the ``License''). You may not use this file except in compliance with the License. You can obtain a copy in the file