diff options
Diffstat (limited to 'openssl-1.1.0h/crypto/bio/b_sock2.c')
| -rw-r--r-- | openssl-1.1.0h/crypto/bio/b_sock2.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/bio/b_sock2.c b/openssl-1.1.0h/crypto/bio/b_sock2.c new file mode 100644 index 0000000..d8b49d0 --- /dev/null +++ b/openssl-1.1.0h/crypto/bio/b_sock2.c @@ -0,0 +1,277 @@ +/* + * Copyright 2016-2018 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 LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include <stdio.h> +#include <stdlib.h> +#include <errno.h> + +#include "bio_lcl.h" + +#include <openssl/err.h> + +#ifndef OPENSSL_NO_SOCK +# ifdef SO_MAXCONN +# define MAX_LISTEN SO_MAXCONN +# elif defined(SOMAXCONN) +# define MAX_LISTEN SOMAXCONN +# else +# define MAX_LISTEN 32 +# endif + +/*- + * BIO_socket - create a socket + * @domain: the socket domain (AF_INET, AF_INET6, AF_UNIX, ...) + * @socktype: the socket type (SOCK_STEAM, SOCK_DGRAM) + * @protocol: the protocol to use (IPPROTO_TCP, IPPROTO_UDP) + * @options: BIO socket options (currently unused) + * + * Creates a socket. This should be called before calling any + * of BIO_connect and BIO_listen. + * + * Returns the file descriptor on success or INVALID_SOCKET on failure. On + * failure errno is set, and a status is added to the OpenSSL error stack. + */ +int BIO_socket(int domain, int socktype, int protocol, int options) +{ + int sock = -1; + + if (BIO_sock_init() != 1) + return INVALID_SOCKET; + + sock = socket(domain, socktype, protocol); + if (sock == -1) { + SYSerr(SYS_F_SOCKET, get_last_socket_error()); + BIOerr(BIO_F_BIO_SOCKET, BIO_R_UNABLE_TO_CREATE_SOCKET); + return INVALID_SOCKET; + } + + return sock; +} + +/*- + * BIO_connect - connect to an address + * @sock: the socket to connect with + * @addr: the address to connect to + * @options: BIO socket options + * + * Connects to the address using the given socket and options. + * + * Options can be a combination of the following: + * - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages. + * - BIO_SOCK_NONBLOCK: Make the socket non-blocking. + * - BIO_SOCK_NODELAY: don't delay small messages. + * + * options holds BIO socket options that can be used + * You should call this for every address returned by BIO_lookup + * until the connection is successful. + * + * Returns 1 on success or 0 on failure. On failure errno is set + * and an error status is added to the OpenSSL error stack. + */ +int BIO_connect(int sock, const BIO_ADDR *addr, int options) +{ + int on = 1; + + if (sock == -1) { + BIOerr(BIO_F_BIO_CONNECT, BIO_R_INVALID_SOCKET); + return 0; + } + + if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0)) + return 0; + + if (options & BIO_SOCK_KEEPALIVE) { + if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)) != 0) { + SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_CONNECT, BIO_R_UNABLE_TO_KEEPALIVE); + return 0; + } + } + + if (options & BIO_SOCK_NODELAY) { + if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) != 0) { + SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_CONNECT, BIO_R_UNABLE_TO_NODELAY); + return 0; + } + } + + if (connect(sock, BIO_ADDR_sockaddr(addr), + BIO_ADDR_sockaddr_size(addr)) == -1) { + if (!BIO_sock_should_retry(-1)) { + SYSerr(SYS_F_CONNECT, get_last_socket_error()); + BIOerr(BIO_F_BIO_CONNECT, BIO_R_CONNECT_ERROR); + } + return 0; + } + return 1; +} + +/*- + * BIO_listen - Creates a listen socket + * @sock: the socket to listen with + * @addr: local address to bind to + * @options: BIO socket options + * + * Binds to the address using the given socket and options, then + * starts listening for incoming connections. + * + * Options can be a combination of the following: + * - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages. + * - BIO_SOCK_NONBLOCK: Make the socket non-blocking. + * - BIO_SOCK_NODELAY: don't delay small messages. + * - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination + * for a recently closed port. + * - BIO_SOCK_V6_ONLY: When creating an IPv6 socket, make it listen only + * for IPv6 addresses and not IPv4 addresses mapped to IPv6. + * + * It's recommended that you set up both an IPv6 and IPv4 listen socket, and + * then check both for new clients that connect to it. You want to set up + * the socket as non-blocking in that case since else it could hang. + * + * Not all operating systems support IPv4 addresses on an IPv6 socket, and for + * others it's an option. If you pass the BIO_LISTEN_V6_ONLY it will try to + * create the IPv6 sockets to only listen for IPv6 connection. + * + * It could be that the first BIO_listen() call will listen to all the IPv6 + * and IPv4 addresses and that then trying to bind to the IPv4 address will + * fail. We can't tell the difference between already listening ourself to + * it and someone else listening to it when failing and errno is EADDRINUSE, so + * it's recommended to not give an error in that case if the first call was + * successful. + * + * When restarting the program it could be that the port is still in use. If + * you set to BIO_SOCK_REUSEADDR option it will try to reuse the port anyway. + * It's recommended that you use this. + */ +int BIO_listen(int sock, const BIO_ADDR *addr, int options) +{ + int on = 1; + int socktype; + socklen_t socktype_len = sizeof(socktype); + + if (sock == -1) { + BIOerr(BIO_F_BIO_LISTEN, BIO_R_INVALID_SOCKET); + return 0; + } + + if (getsockopt(sock, SOL_SOCKET, SO_TYPE, &socktype, &socktype_len) != 0 + || socktype_len != sizeof(socktype)) { + SYSerr(SYS_F_GETSOCKOPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_LISTEN, BIO_R_GETTING_SOCKTYPE); + return 0; + } + + if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0)) + return 0; + +# ifndef OPENSSL_SYS_WINDOWS + /* + * SO_REUSEADDR has different behavior on Windows than on + * other operating systems, don't set it there. + */ + if (options & BIO_SOCK_REUSEADDR) { + if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) != 0) { + SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_REUSEADDR); + return 0; + } + } +# endif + + if (options & BIO_SOCK_KEEPALIVE) { + if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)) != 0) { + SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_KEEPALIVE); + return 0; + } + } + + if (options & BIO_SOCK_NODELAY) { + if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) != 0) { + SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_NODELAY); + return 0; + } + } + +# ifdef IPV6_V6ONLY + if (BIO_ADDR_family(addr) == AF_INET6) { + /* + * Note: Windows default of IPV6_V6ONLY is ON, and Linux is OFF. + * Therefore we always have to use setsockopt here. + */ + on = options & BIO_SOCK_V6_ONLY ? 1 : 0; + if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &on, sizeof(on)) != 0) { + SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_LISTEN, BIO_R_LISTEN_V6_ONLY); + return 0; + } + } +# endif + + if (bind(sock, BIO_ADDR_sockaddr(addr), BIO_ADDR_sockaddr_size(addr)) != 0) { + SYSerr(SYS_F_BIND, get_last_socket_error()); + BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_BIND_SOCKET); + return 0; + } + + if (socktype != SOCK_DGRAM && listen(sock, MAX_LISTEN) == -1) { + SYSerr(SYS_F_LISTEN, get_last_socket_error()); + BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_LISTEN_SOCKET); + return 0; + } + + return 1; +} + +/*- + * BIO_accept_ex - Accept new incoming connections + * @sock: the listening socket + * @addr: the BIO_ADDR to store the peer address in + * @options: BIO socket options, applied on the accepted socket. + * + */ +int BIO_accept_ex(int accept_sock, BIO_ADDR *addr_, int options) +{ + socklen_t len; + int accepted_sock; + BIO_ADDR locaddr; + BIO_ADDR *addr = addr_ == NULL ? &locaddr : addr_; + + len = sizeof(*addr); + accepted_sock = accept(accept_sock, + BIO_ADDR_sockaddr_noconst(addr), &len); + if (accepted_sock == -1) { + if (!BIO_sock_should_retry(accepted_sock)) { + SYSerr(SYS_F_ACCEPT, get_last_socket_error()); + BIOerr(BIO_F_BIO_ACCEPT_EX, BIO_R_ACCEPT_ERROR); + } + return INVALID_SOCKET; + } + + if (!BIO_socket_nbio(accepted_sock, (options & BIO_SOCK_NONBLOCK) != 0)) { + closesocket(accepted_sock); + return INVALID_SOCKET; + } + + return accepted_sock; +} + +/*- + * BIO_closesocket - Close a socket + * @sock: the socket to close + */ +int BIO_closesocket(int sock) +{ + if (closesocket(sock) < 0) + return 0; + return 1; +} +#endif |