[thirdparty/openssl.git] / crypto / bio / b_sock2.c

/*
 * Copyright 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 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)
{
    const 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,
                       (const void *)&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,
                       (const void *)&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,
                   (void *)&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,
                       (const void *)&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,
                       (const void *)&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,
                       (const void *)&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 ((options & BIO_SOCK_V6_ONLY) && BIO_ADDR_family(addr) == AF_INET6) {
        if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
                       (const void *)&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
Commit	Line	Data
b1322259 RS	1	/*
b1322259 RS	2	* Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
d33b215b	3	*
b1322259 RS	4	* Licensed under the OpenSSL license (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
d33b215b RL	8	*/
	9
	10	#include <stdio.h>
	11	#include <stdlib.h>
	12	#include <errno.h>
	13
	14	#include "bio_lcl.h"
	15
	16	#include <openssl/err.h>
	17
	18	#ifndef OPENSSL_NO_SOCK
	19	# ifdef SO_MAXCONN
	20	# define MAX_LISTEN SO_MAXCONN
	21	# elif defined(SOMAXCONN)
	22	# define MAX_LISTEN SOMAXCONN
	23	# else
	24	# define MAX_LISTEN 32
	25	# endif
	26
	27	/*-
	28	* BIO_socket - create a socket
	29	* @domain: the socket domain (AF_INET, AF_INET6, AF_UNIX, ...)
	30	* @socktype: the socket type (SOCK_STEAM, SOCK_DGRAM)
	31	* @protocol: the protocol to use (IPPROTO_TCP, IPPROTO_UDP)
	32	* @options: BIO socket options (currently unused)
	33	*
	34	* Creates a socket. This should be called before calling any
	35	* of BIO_connect and BIO_listen.
	36	*
	37	* Returns the file descriptor on success or INVALID_SOCKET on failure. On
	38	* failure errno is set, and a status is added to the OpenSSL error stack.
	39	*/
	40	int BIO_socket(int domain, int socktype, int protocol, int options)
	41	{
	42	int sock = -1;
	43
	44	if (BIO_sock_init() != 1)
	45	return INVALID_SOCKET;
	46
	47	sock = socket(domain, socktype, protocol);
	48	if (sock == -1) {
	49	SYSerr(SYS_F_SOCKET, get_last_socket_error());
	50	BIOerr(BIO_F_BIO_SOCKET, BIO_R_UNABLE_TO_CREATE_SOCKET);
	51	return INVALID_SOCKET;
	52	}
	53
	54	return sock;
	55	}
	56
	57	/*-
	58	* BIO_connect - connect to an address
	59	* @sock: the socket to connect with
	60	* @addr: the address to connect to
	61	* @options: BIO socket options
	62	*
	63	* Connects to the address using the given socket and options.
	64	*
	65	* Options can be a combination of the following:
	66	* - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages.
	67	* - BIO_SOCK_NONBLOCK: Make the socket non-blocking.
	68	* - BIO_SOCK_NODELAY: don't delay small messages.
	69	*
	70	* options holds BIO socket options that can be used
	71	* You should call this for every address returned by BIO_lookup
60250017	72	* until the connection is successful.
d33b215b RL	73	*
	74	* Returns 1 on success or 0 on failure. On failure errno is set
	75	* and an error status is added to the OpenSSL error stack.
	76	*/
	77	int BIO_connect(int sock, const BIO_ADDR *addr, int options)
	78	{
3a63c0ed	79	const int on = 1;
d33b215b RL	80
	81	if (sock == -1) {
	82	BIOerr(BIO_F_BIO_CONNECT, BIO_R_INVALID_SOCKET);
	83	return 0;
	84	}
	85
	86	if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0))
	87	return 0;
	88
	89	if (options & BIO_SOCK_KEEPALIVE) {
3a63c0ed AP	90	if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
3a63c0ed AP	91	(const void *)&on, sizeof(on)) != 0) {
d33b215b RL	92	SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error());
	93	BIOerr(BIO_F_BIO_CONNECT, BIO_R_UNABLE_TO_KEEPALIVE);
	94	return 0;
	95	}
	96	}
	97
	98	if (options & BIO_SOCK_NODELAY) {
3a63c0ed AP	99	if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
3a63c0ed AP	100	(const void *)&on, sizeof(on)) != 0) {
d33b215b RL	101	SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error());
	102	BIOerr(BIO_F_BIO_CONNECT, BIO_R_UNABLE_TO_NODELAY);
	103	return 0;
	104	}
	105	}
	106
	107	if (connect(sock, BIO_ADDR_sockaddr(addr),
	108	BIO_ADDR_sockaddr_size(addr)) == -1) {
81161070 MC	109	if (!BIO_sock_should_retry(-1)) {
	110	SYSerr(SYS_F_CONNECT, get_last_socket_error());
	111	BIOerr(BIO_F_BIO_CONNECT, BIO_R_CONNECT_ERROR);
	112	}
d33b215b RL	113	return 0;
	114	}
	115	return 1;
	116	}
	117
	118	/*-
	119	* BIO_listen - Creates a listen socket
	120	* @sock: the socket to listen with
	121	* @addr: local address to bind to
	122	* @options: BIO socket options
	123	*
	124	* Binds to the address using the given socket and options, then
	125	* starts listening for incoming connections.
	126	*
	127	* Options can be a combination of the following:
	128	* - BIO_SOCK_KEEPALIVE: enable regularly sending keep-alive messages.
	129	* - BIO_SOCK_NONBLOCK: Make the socket non-blocking.
	130	* - BIO_SOCK_NODELAY: don't delay small messages.
	131	* - BIO_SOCK_REUSEADDR: Try to reuse the address and port combination
	132	* for a recently closed port.
	133	* - BIO_SOCK_V6_ONLY: When creating an IPv6 socket, make it listen only
	134	* for IPv6 addresses and not IPv4 addresses mapped to IPv6.
	135	*
	136	* It's recommended that you set up both an IPv6 and IPv4 listen socket, and
	137	* then check both for new clients that connect to it. You want to set up
	138	* the socket as non-blocking in that case since else it could hang.
	139	*
	140	* Not all operating systems support IPv4 addresses on an IPv6 socket, and for
	141	* others it's an option. If you pass the BIO_LISTEN_V6_ONLY it will try to
	142	* create the IPv6 sockets to only listen for IPv6 connection.
	143	*
	144	* It could be that the first BIO_listen() call will listen to all the IPv6
	145	* and IPv4 addresses and that then trying to bind to the IPv4 address will
	146	* fail. We can't tell the difference between already listening ourself to
	147	* it and someone else listening to it when failing and errno is EADDRINUSE, so
	148	* it's recommended to not give an error in that case if the first call was
60250017	149	* successful.
d33b215b RL	150	*
	151	* When restarting the program it could be that the port is still in use. If
	152	* you set to BIO_SOCK_REUSEADDR option it will try to reuse the port anyway.
	153	* It's recommended that you use this.
	154	*/
	155	int BIO_listen(int sock, const BIO_ADDR *addr, int options)
	156	{
	157	int on = 1;
	158	int socktype;
	159	socklen_t socktype_len = sizeof(socktype);
	160
	161	if (sock == -1) {
	162	BIOerr(BIO_F_BIO_LISTEN, BIO_R_INVALID_SOCKET);
	163	return 0;
	164	}
	165
3a63c0ed AP	166	if (getsockopt(sock, SOL_SOCKET, SO_TYPE,
3a63c0ed AP	167	(void *)&socktype, &socktype_len) != 0
d33b215b RL	168	\|\| socktype_len != sizeof(socktype)) {
	169	SYSerr(SYS_F_GETSOCKOPT, get_last_socket_error());
	170	BIOerr(BIO_F_BIO_LISTEN, BIO_R_GETTING_SOCKTYPE);
	171	return 0;
	172	}
	173
	174	if (!BIO_socket_nbio(sock, (options & BIO_SOCK_NONBLOCK) != 0))
	175	return 0;
	176
	177	# ifndef OPENSSL_SYS_WINDOWS
	178	/* SO_REUSEADDR has different behavior on Windows than on
	179	* other operating systems, don't set it there. */
	180	if (options & BIO_SOCK_REUSEADDR) {
3a63c0ed AP	181	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,
3a63c0ed AP	182	(const void *)&on, sizeof(on)) != 0) {
d33b215b RL	183	SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error());
	184	BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_REUSEADDR);
	185	return 0;
	186	}
	187	}
	188	# endif
	189
	190	if (options & BIO_SOCK_KEEPALIVE) {
3a63c0ed AP	191	if (setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
3a63c0ed AP	192	(const void *)&on, sizeof(on)) != 0) {
d33b215b RL	193	SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error());
	194	BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_KEEPALIVE);
	195	return 0;
	196	}
	197	}
	198
	199	if (options & BIO_SOCK_NODELAY) {
3a63c0ed AP	200	if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
3a63c0ed AP	201	(const void *)&on, sizeof(on)) != 0) {
d33b215b RL	202	SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error());
	203	BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_NODELAY);
	204	return 0;
	205	}
	206	}
	207
	208	# ifdef IPV6_V6ONLY
	209	if ((options & BIO_SOCK_V6_ONLY) && BIO_ADDR_family(addr) == AF_INET6) {
3a63c0ed AP	210	if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
3a63c0ed AP	211	(const void *)&on, sizeof(on)) != 0) {
d33b215b RL	212	SYSerr(SYS_F_SETSOCKOPT, get_last_socket_error());
	213	BIOerr(BIO_F_BIO_LISTEN, BIO_R_LISTEN_V6_ONLY);
	214	return 0;
	215	}
	216	}
	217	# endif
	218
	219	if (bind(sock, BIO_ADDR_sockaddr(addr), BIO_ADDR_sockaddr_size(addr)) != 0) {
	220	SYSerr(SYS_F_BIND, get_last_socket_error());
	221	BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_BIND_SOCKET);
	222	return 0;
	223	}
	224
	225	if (socktype != SOCK_DGRAM && listen(sock, MAX_LISTEN) == -1) {
	226	SYSerr(SYS_F_LISTEN, get_last_socket_error());
	227	BIOerr(BIO_F_BIO_LISTEN, BIO_R_UNABLE_TO_LISTEN_SOCKET);
	228	return 0;
	229	}
	230
	231	return 1;
	232	}
	233
	234	/*-
	235	* BIO_accept_ex - Accept new incoming connections
	236	* @sock: the listening socket
	237	* @addr: the BIO_ADDR to store the peer address in
	238	* @options: BIO socket options, applied on the accepted socket.
	239	*
	240	*/
d9d8e7a9	241	int BIO_accept_ex(int accept_sock, BIO_ADDR *addr_, int options)
d33b215b RL	242	{
	243	socklen_t len;
	244	int accepted_sock;
d9d8e7a9 RS	245	BIO_ADDR locaddr;
d9d8e7a9 RS	246	BIO_ADDR *addr = addr_ == NULL ? &locaddr : addr_;
d33b215b RL	247
	248	len = sizeof(*addr);
	249	accepted_sock = accept(accept_sock,
	250	BIO_ADDR_sockaddr_noconst(addr), &len);
	251	if (accepted_sock == -1) {
81161070 MC	252	if (!BIO_sock_should_retry(accepted_sock)) {
	253	SYSerr(SYS_F_ACCEPT, get_last_socket_error());
	254	BIOerr(BIO_F_BIO_ACCEPT_EX, BIO_R_ACCEPT_ERROR);
	255	}
d33b215b RL	256	return INVALID_SOCKET;
	257	}
	258
df0f2759 MC	259	if (!BIO_socket_nbio(accepted_sock, (options & BIO_SOCK_NONBLOCK) != 0)) {
df0f2759 MC	260	closesocket(accepted_sock);
d33b215b	261	return INVALID_SOCKET;
df0f2759	262	}
d33b215b RL	263
	264	return accepted_sock;
	265	}
	266
	267	/*-
	268	* BIO_closesocket - Close a socket
	269	* @sock: the socket to close
	270	*/
	271	int BIO_closesocket(int sock)
	272	{
	273	if (closesocket(sock) < 0)
	274	return 0;
	275	return 1;
	276	}
	277	#endif