/src/openssl30/crypto/bio/bio_sock2.c

Source
/*
 * Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (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_local.h"
#include "internal/ktls.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) {
        ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
            "calling socket()");
        ERR_raise(ERR_LIB_BIO, 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)
{
    const int on = 1;

    if (sock == -1) {
        ERR_raise(ERR_LIB_BIO, 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,
                (const void *)&on, sizeof(on))
            != 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling setsockopt()");
            ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_KEEPALIVE);
            return 0;
        }
    }

    if (options & BIO_SOCK_NODELAY) {
        if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
                (const void *)&on, sizeof(on))
            != 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling setsockopt()");
            ERR_raise(ERR_LIB_BIO, 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)) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling connect()");
            ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR);
        }
        return 0;
    }
    return 1;
}

/*-
 * BIO_bind - bind socket to address
 * @sock: the socket to set
 * @addr: local address to bind to
 * @options: BIO socket options
 *
 * Binds to the address using the given socket and options.
 *
 * Options can be a combination of the following:
 * - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination
 *   for a recently closed port.
 *
 * 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_bind(int sock, const BIO_ADDR *addr, int options)
{
#ifndef OPENSSL_SYS_WINDOWS
    int on = 1;
#endif

    if (sock == -1) {
        ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_SOCKET);
        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,
                (const void *)&on, sizeof(on))
            != 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling setsockopt()");
            ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_REUSEADDR);
            return 0;
        }
    }
#endif

    if (bind(sock, BIO_ADDR_sockaddr(addr), BIO_ADDR_sockaddr_size(addr)) != 0) {
        ERR_raise_data(ERR_LIB_SYS, get_last_socket_error() /* may be 0 */,
            "calling bind()");
        ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_BIND_SOCKET);
        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) {
        ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_SOCKET);
        return 0;
    }

    if (getsockopt(sock, SOL_SOCKET, SO_TYPE,
            (void *)&socktype, &socktype_len)
            != 0
        || socktype_len != sizeof(socktype)) {
        ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
            "calling getsockopt()");
        ERR_raise(ERR_LIB_BIO, BIO_R_GETTING_SOCKTYPE);
        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,
                (const void *)&on, sizeof(on))
            != 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling setsockopt()");
            ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_KEEPALIVE);
            return 0;
        }
    }

    if (options & BIO_SOCK_NODELAY) {
        if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
                (const void *)&on, sizeof(on))
            != 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling setsockopt()");
            ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_NODELAY);
            return 0;
        }
    }

    /* On OpenBSD it is always ipv6 only with ipv6 sockets thus read-only */
#if defined(IPV6_V6ONLY) && !defined(__OpenBSD__)
    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,
                (const void *)&on, sizeof(on))
            != 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling setsockopt()");
            ERR_raise(ERR_LIB_BIO, BIO_R_LISTEN_V6_ONLY);
            return 0;
        }
    }
#endif

    if (!BIO_bind(sock, addr, options))
        return 0;

    if (socktype != SOCK_DGRAM && listen(sock, MAX_LISTEN) == -1) {
        ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
            "calling listen()");
        ERR_raise(ERR_LIB_BIO, 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)) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                "calling accept()");
            ERR_raise(ERR_LIB_BIO, 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 (sock < 0 || closesocket(sock) < 0)
        return 0;
    return 1;
}
#endif

Coverage Report

Created: 2025-12-31 06:58

Line	Count	Source
1		/*
2		* Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#include <stdio.h>
11		#include <stdlib.h>
12		#include <errno.h>
13
14		#include "bio_local.h"
15		#include "internal/ktls.h"
16
17		#include <openssl/err.h>
18
19		#ifndef OPENSSL_NO_SOCK
20		#ifdef SO_MAXCONN
21		#define MAX_LISTEN SO_MAXCONN
22		#elif defined(SOMAXCONN)
23	0	#define MAX_LISTEN SOMAXCONN
24		#else
25		#define MAX_LISTEN 32
26		#endif
27
28		/*-
29		* BIO_socket - create a socket
30		* @domain: the socket domain (AF_INET, AF_INET6, AF_UNIX, ...)
31		* @socktype: the socket type (SOCK_STEAM, SOCK_DGRAM)
32		* @protocol: the protocol to use (IPPROTO_TCP, IPPROTO_UDP)
33		* @options: BIO socket options (currently unused)
34		*
35		* Creates a socket. This should be called before calling any
36		* of BIO_connect and BIO_listen.
37		*
38		* Returns the file descriptor on success or INVALID_SOCKET on failure. On
39		* failure errno is set, and a status is added to the OpenSSL error stack.
40		*/
41		int BIO_socket(int domain, int socktype, int protocol, int options)
42	0	{
43	0	int sock = -1;
44
45	0	if (BIO_sock_init() != 1)
46	0	return INVALID_SOCKET;
47
48	0	sock = socket(domain, socktype, protocol);
49	0	if (sock == -1) {
50	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
51	0	"calling socket()");
52	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_CREATE_SOCKET);
53	0	return INVALID_SOCKET;
54	0	}
55
56	0	return sock;
57	0	}
58
59		/*-
60		* BIO_connect - connect to an address
61		* @sock: the socket to connect with
62		* @addr: the address to connect to
63		* @options: BIO socket options
64		*
65		* Connects to the address using the given socket and options.
66		*
67		* Options can be a combination of the following:
68		* - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages.
69		* - BIO_SOCK_NONBLOCK: Make the socket non-blocking.
70		* - BIO_SOCK_NODELAY: don't delay small messages.
71		*
72		* options holds BIO socket options that can be used
73		* You should call this for every address returned by BIO_lookup
74		* until the connection is successful.
75		*
76		* Returns 1 on success or 0 on failure. On failure errno is set
77		* and an error status is added to the OpenSSL error stack.
78		*/
79		int BIO_connect(int sock, const BIO_ADDR *addr, int options)
80	0	{
81	0	const int on = 1;
82
83	0	if (sock == -1) {
84	0	ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_SOCKET);
85	0	return 0;
86	0	}
87
88	0	if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0))
89	0	return 0;
90
91	0	if (options & BIO_SOCK_KEEPALIVE) {
92	0	if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
93	0	(const void *)&on, sizeof(on))
94	0	!= 0) {
95	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
96	0	"calling setsockopt()");
97	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_KEEPALIVE);
98	0	return 0;
99	0	}
100	0	}
101
102	0	if (options & BIO_SOCK_NODELAY) {
103	0	if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
104	0	(const void *)&on, sizeof(on))
105	0	!= 0) {
106	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
107	0	"calling setsockopt()");
108	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_NODELAY);
109	0	return 0;
110	0	}
111	0	}
112
113	0	if (connect(sock, BIO_ADDR_sockaddr(addr),
114	0	BIO_ADDR_sockaddr_size(addr))
115	0	== -1) {
116	0	if (!BIO_sock_should_retry(-1)) {
117	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
118	0	"calling connect()");
119	0	ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR);
120	0	}
121	0	return 0;
122	0	}
123	0	return 1;
124	0	}
125
126		/*-
127		* BIO_bind - bind socket to address
128		* @sock: the socket to set
129		* @addr: local address to bind to
130		* @options: BIO socket options
131		*
132		* Binds to the address using the given socket and options.
133		*
134		* Options can be a combination of the following:
135		* - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination
136		* for a recently closed port.
137		*
138		* When restarting the program it could be that the port is still in use. If
139		* you set to BIO_SOCK_REUSEADDR option it will try to reuse the port anyway.
140		* It's recommended that you use this.
141		*/
142		int BIO_bind(int sock, const BIO_ADDR *addr, int options)
143	0	{
144	0	#ifndef OPENSSL_SYS_WINDOWS
145	0	int on = 1;
146	0	#endif
147
148	0	if (sock == -1) {
149	0	ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_SOCKET);
150	0	return 0;
151	0	}
152
153	0	#ifndef OPENSSL_SYS_WINDOWS
154		/*
155		* SO_REUSEADDR has different behavior on Windows than on
156		* other operating systems, don't set it there.
157		*/
158	0	if (options & BIO_SOCK_REUSEADDR) {
159	0	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
160	0	(const void *)&on, sizeof(on))
161	0	!= 0) {
162	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
163	0	"calling setsockopt()");
164	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_REUSEADDR);
165	0	return 0;
166	0	}
167	0	}
168	0	#endif
169
170	0	if (bind(sock, BIO_ADDR_sockaddr(addr), BIO_ADDR_sockaddr_size(addr)) != 0) {
171	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error() /* may be 0 */,
172	0	"calling bind()");
173	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_BIND_SOCKET);
174	0	return 0;
175	0	}
176
177	0	return 1;
178	0	}
179
180		/*-
181		* BIO_listen - Creates a listen socket
182		* @sock: the socket to listen with
183		* @addr: local address to bind to
184		* @options: BIO socket options
185		*
186		* Binds to the address using the given socket and options, then
187		* starts listening for incoming connections.
188		*
189		* Options can be a combination of the following:
190		* - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages.
191		* - BIO_SOCK_NONBLOCK: Make the socket non-blocking.
192		* - BIO_SOCK_NODELAY: don't delay small messages.
193		* - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination
194		* for a recently closed port.
195		* - BIO_SOCK_V6_ONLY: When creating an IPv6 socket, make it listen only
196		* for IPv6 addresses and not IPv4 addresses mapped to IPv6.
197		*
198		* It's recommended that you set up both an IPv6 and IPv4 listen socket, and
199		* then check both for new clients that connect to it. You want to set up
200		* the socket as non-blocking in that case since else it could hang.
201		*
202		* Not all operating systems support IPv4 addresses on an IPv6 socket, and for
203		* others it's an option. If you pass the BIO_LISTEN_V6_ONLY it will try to
204		* create the IPv6 sockets to only listen for IPv6 connection.
205		*
206		* It could be that the first BIO_listen() call will listen to all the IPv6
207		* and IPv4 addresses and that then trying to bind to the IPv4 address will
208		* fail. We can't tell the difference between already listening ourself to
209		* it and someone else listening to it when failing and errno is EADDRINUSE, so
210		* it's recommended to not give an error in that case if the first call was
211		* successful.
212		*
213		* When restarting the program it could be that the port is still in use. If
214		* you set to BIO_SOCK_REUSEADDR option it will try to reuse the port anyway.
215		* It's recommended that you use this.
216		*/
217		int BIO_listen(int sock, const BIO_ADDR *addr, int options)
218	0	{
219	0	int on = 1;
220	0	int socktype;
221	0	socklen_t socktype_len = sizeof(socktype);
222
223	0	if (sock == -1) {
224	0	ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_SOCKET);
225	0	return 0;
226	0	}
227
228	0	if (getsockopt(sock, SOL_SOCKET, SO_TYPE,
229	0	(void *)&socktype, &socktype_len)
230	0	!= 0
231	0	\|\| socktype_len != sizeof(socktype)) {
232	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
233	0	"calling getsockopt()");
234	0	ERR_raise(ERR_LIB_BIO, BIO_R_GETTING_SOCKTYPE);
235	0	return 0;
236	0	}
237
238	0	if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0))
239	0	return 0;
240
241	0	if (options & BIO_SOCK_KEEPALIVE) {
242	0	if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
243	0	(const void *)&on, sizeof(on))
244	0	!= 0) {
245	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
246	0	"calling setsockopt()");
247	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_KEEPALIVE);
248	0	return 0;
249	0	}
250	0	}
251
252	0	if (options & BIO_SOCK_NODELAY) {
253	0	if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
254	0	(const void *)&on, sizeof(on))
255	0	!= 0) {
256	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
257	0	"calling setsockopt()");
258	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_NODELAY);
259	0	return 0;
260	0	}
261	0	}
262
263		/* On OpenBSD it is always ipv6 only with ipv6 sockets thus read-only */
264	0	#if defined(IPV6_V6ONLY) && !defined(__OpenBSD__)
265	0	if (BIO_ADDR_family(addr) == AF_INET6) {
266		/*
267		* Note: Windows default of IPV6_V6ONLY is ON, and Linux is OFF.
268		* Therefore we always have to use setsockopt here.
269		*/
270	0	on = options & BIO_SOCK_V6_ONLY ? 1 : 0;
271	0	if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
272	0	(const void *)&on, sizeof(on))
273	0	!= 0) {
274	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
275	0	"calling setsockopt()");
276	0	ERR_raise(ERR_LIB_BIO, BIO_R_LISTEN_V6_ONLY);
277	0	return 0;
278	0	}
279	0	}
280	0	#endif
281
282	0	if (!BIO_bind(sock, addr, options))
283	0	return 0;
284
285	0	if (socktype != SOCK_DGRAM && listen(sock, MAX_LISTEN) == -1) {
286	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
287	0	"calling listen()");
288	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_LISTEN_SOCKET);
289	0	return 0;
290	0	}
291
292	0	return 1;
293	0	}
294
295		/*-
296		* BIO_accept_ex - Accept new incoming connections
297		* @sock: the listening socket
298		* @addr: the BIO_ADDR to store the peer address in
299		* @options: BIO socket options, applied on the accepted socket.
300		*
301		*/
302		int BIO_accept_ex(int accept_sock, BIO_ADDR *addr_, int options)
303	0	{
304	0	socklen_t len;
305	0	int accepted_sock;
306	0	BIO_ADDR locaddr;
307	0	BIO_ADDR *addr = addr_ == NULL ? &locaddr : addr_;
308
309	0	len = sizeof(*addr);
310	0	accepted_sock = accept(accept_sock,
311	0	BIO_ADDR_sockaddr_noconst(addr), &len);
312	0	if (accepted_sock == -1) {
313	0	if (!BIO_sock_should_retry(accepted_sock)) {
314	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
315	0	"calling accept()");
316	0	ERR_raise(ERR_LIB_BIO, BIO_R_ACCEPT_ERROR);
317	0	}
318	0	return INVALID_SOCKET;
319	0	}
320
321	0	if (!BIO_socket_nbio(accepted_sock, (options & BIO_SOCK_NONBLOCK) != 0)) {
322	0	closesocket(accepted_sock);
323	0	return INVALID_SOCKET;
324	0	}
325
326	0	return accepted_sock;
327	0	}
328
329		/*-
330		* BIO_closesocket - Close a socket
331		* @sock: the socket to close
332		*/
333		int BIO_closesocket(int sock)
334	0	{
335	0	if (sock < 0 \|\| closesocket(sock) < 0)
336	0	return 0;
337	0	return 1;
338	0	}
339		#endif