/src/openssl31/crypto/bio/bio_sock2.c

Source (jump to first uncovered line)
/*
 * 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;
    }
# ifndef OPENSSL_NO_KTLS
    /*
     * The new socket is created successfully regardless of ktls_enable.
     * ktls_enable doesn't change any functionality of the socket, except
     * changing the setsockopt to enable the processing of ktls_start.
     * Thus, it is not a problem to call it for non-TLS sockets.
     */
    ktls_enable(sock);
# endif
    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: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
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)) != 0) {
94	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
95	0	"calling setsockopt()");
96	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_KEEPALIVE);
97	0	return 0;
98	0	}
99	0	}
100
101	0	if (options & BIO_SOCK_NODELAY) {
102	0	if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
103	0	(const void *)&on, sizeof(on)) != 0) {
104	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
105	0	"calling setsockopt()");
106	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_NODELAY);
107	0	return 0;
108	0	}
109	0	}
110
111	0	if (connect(sock, BIO_ADDR_sockaddr(addr),
112	0	BIO_ADDR_sockaddr_size(addr)) == -1) {
113	0	if (!BIO_sock_should_retry(-1)) {
114	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
115	0	"calling connect()");
116	0	ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR);
117	0	}
118	0	return 0;
119	0	}
120		# ifndef OPENSSL_NO_KTLS
121		/*
122		* The new socket is created successfully regardless of ktls_enable.
123		* ktls_enable doesn't change any functionality of the socket, except
124		* changing the setsockopt to enable the processing of ktls_start.
125		* Thus, it is not a problem to call it for non-TLS sockets.
126		*/
127		ktls_enable(sock);
128		# endif
129	0	return 1;
130	0	}
131
132		/*-
133		* BIO_bind - bind socket to address
134		* @sock: the socket to set
135		* @addr: local address to bind to
136		* @options: BIO socket options
137		*
138		* Binds to the address using the given socket and options.
139		*
140		* Options can be a combination of the following:
141		* - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination
142		* for a recently closed port.
143		*
144		* When restarting the program it could be that the port is still in use. If
145		* you set to BIO_SOCK_REUSEADDR option it will try to reuse the port anyway.
146		* It's recommended that you use this.
147		*/
148		int BIO_bind(int sock, const BIO_ADDR *addr, int options)
149	0	{
150	0	# ifndef OPENSSL_SYS_WINDOWS
151	0	int on = 1;
152	0	# endif
153
154	0	if (sock == -1) {
155	0	ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_SOCKET);
156	0	return 0;
157	0	}
158
159	0	# ifndef OPENSSL_SYS_WINDOWS
160		/*
161		* SO_REUSEADDR has different behavior on Windows than on
162		* other operating systems, don't set it there.
163		*/
164	0	if (options & BIO_SOCK_REUSEADDR) {
165	0	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
166	0	(const void *)&on, sizeof(on)) != 0) {
167	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
168	0	"calling setsockopt()");
169	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_REUSEADDR);
170	0	return 0;
171	0	}
172	0	}
173	0	# endif
174
175	0	if (bind(sock, BIO_ADDR_sockaddr(addr), BIO_ADDR_sockaddr_size(addr)) != 0) {
176	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error() /* may be 0 */,
177	0	"calling bind()");
178	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_BIND_SOCKET);
179	0	return 0;
180	0	}
181
182	0	return 1;
183	0	}
184
185		/*-
186		* BIO_listen - Creates a listen socket
187		* @sock: the socket to listen with
188		* @addr: local address to bind to
189		* @options: BIO socket options
190		*
191		* Binds to the address using the given socket and options, then
192		* starts listening for incoming connections.
193		*
194		* Options can be a combination of the following:
195		* - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages.
196		* - BIO_SOCK_NONBLOCK: Make the socket non-blocking.
197		* - BIO_SOCK_NODELAY: don't delay small messages.
198		* - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination
199		* for a recently closed port.
200		* - BIO_SOCK_V6_ONLY: When creating an IPv6 socket, make it listen only
201		* for IPv6 addresses and not IPv4 addresses mapped to IPv6.
202		*
203		* It's recommended that you set up both an IPv6 and IPv4 listen socket, and
204		* then check both for new clients that connect to it. You want to set up
205		* the socket as non-blocking in that case since else it could hang.
206		*
207		* Not all operating systems support IPv4 addresses on an IPv6 socket, and for
208		* others it's an option. If you pass the BIO_LISTEN_V6_ONLY it will try to
209		* create the IPv6 sockets to only listen for IPv6 connection.
210		*
211		* It could be that the first BIO_listen() call will listen to all the IPv6
212		* and IPv4 addresses and that then trying to bind to the IPv4 address will
213		* fail. We can't tell the difference between already listening ourself to
214		* it and someone else listening to it when failing and errno is EADDRINUSE, so
215		* it's recommended to not give an error in that case if the first call was
216		* successful.
217		*
218		* When restarting the program it could be that the port is still in use. If
219		* you set to BIO_SOCK_REUSEADDR option it will try to reuse the port anyway.
220		* It's recommended that you use this.
221		*/
222		int BIO_listen(int sock, const BIO_ADDR *addr, int options)
223	0	{
224	0	int on = 1;
225	0	int socktype;
226	0	socklen_t socktype_len = sizeof(socktype);
227
228	0	if (sock == -1) {
229	0	ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_SOCKET);
230	0	return 0;
231	0	}
232
233	0	if (getsockopt(sock, SOL_SOCKET, SO_TYPE,
234	0	(void *)&socktype, &socktype_len) != 0
235	0	\|\| socktype_len != sizeof(socktype)) {
236	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
237	0	"calling getsockopt()");
238	0	ERR_raise(ERR_LIB_BIO, BIO_R_GETTING_SOCKTYPE);
239	0	return 0;
240	0	}
241
242	0	if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0))
243	0	return 0;
244
245	0	if (options & BIO_SOCK_KEEPALIVE) {
246	0	if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
247	0	(const void *)&on, sizeof(on)) != 0) {
248	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
249	0	"calling setsockopt()");
250	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_KEEPALIVE);
251	0	return 0;
252	0	}
253	0	}
254
255	0	if (options & BIO_SOCK_NODELAY) {
256	0	if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
257	0	(const void *)&on, sizeof(on)) != 0) {
258	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
259	0	"calling setsockopt()");
260	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_NODELAY);
261	0	return 0;
262	0	}
263	0	}
264
265		/* On OpenBSD it is always IPv6 only with IPv6 sockets thus read-only */
266	0	# if defined(IPV6_V6ONLY) && !defined(__OpenBSD__)
267	0	if (BIO_ADDR_family(addr) == AF_INET6) {
268		/*
269		* Note: Windows default of IPV6_V6ONLY is ON, and Linux is OFF.
270		* Therefore we always have to use setsockopt here.
271		*/
272	0	on = options & BIO_SOCK_V6_ONLY ? 1 : 0;
273	0	if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
274	0	(const void *)&on, sizeof(on)) != 0) {
275	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
276	0	"calling setsockopt()");
277	0	ERR_raise(ERR_LIB_BIO, BIO_R_LISTEN_V6_ONLY);
278	0	return 0;
279	0	}
280	0	}
281	0	# endif
282
283	0	if (!BIO_bind(sock, addr, options))
284	0	return 0;
285
286	0	if (socktype != SOCK_DGRAM && listen(sock, MAX_LISTEN) == -1) {
287	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
288	0	"calling listen()");
289	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_LISTEN_SOCKET);
290	0	return 0;
291	0	}
292
293	0	return 1;
294	0	}
295
296		/*-
297		* BIO_accept_ex - Accept new incoming connections
298		* @sock: the listening socket
299		* @addr: the BIO_ADDR to store the peer address in
300		* @options: BIO socket options, applied on the accepted socket.
301		*
302		*/
303		int BIO_accept_ex(int accept_sock, BIO_ADDR *addr_, int options)
304	0	{
305	0	socklen_t len;
306	0	int accepted_sock;
307	0	BIO_ADDR locaddr;
308	0	BIO_ADDR *addr = addr_ == NULL ? &locaddr : addr_;
309
310	0	len = sizeof(*addr);
311	0	accepted_sock = accept(accept_sock,
312	0	BIO_ADDR_sockaddr_noconst(addr), &len);
313	0	if (accepted_sock == -1) {
314	0	if (!BIO_sock_should_retry(accepted_sock)) {
315	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
316	0	"calling accept()");
317	0	ERR_raise(ERR_LIB_BIO, BIO_R_ACCEPT_ERROR);
318	0	}
319	0	return INVALID_SOCKET;
320	0	}
321
322	0	if (!BIO_socket_nbio(accepted_sock, (options & BIO_SOCK_NONBLOCK) != 0)) {
323	0	closesocket(accepted_sock);
324	0	return INVALID_SOCKET;
325	0	}
326
327	0	return accepted_sock;
328	0	}
329
330		/*-
331		* BIO_closesocket - Close a socket
332		* @sock: the socket to close
333		*/
334		int BIO_closesocket(int sock)
335	0	{
336	0	if (sock < 0 \|\| closesocket(sock) < 0)
337	0	return 0;
338	0	return 1;
339	0	}
340		#endif