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

/*
 * Copyright 1995-2018 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 "bio_local.h"
#ifndef OPENSSL_NO_SOCK
# define SOCKET_PROTOCOL IPPROTO_TCP
# ifdef SO_MAXCONN
#  define MAX_LISTEN  SO_MAXCONN
# elif defined(SOMAXCONN)
#  define MAX_LISTEN  SOMAXCONN
# else
#  define MAX_LISTEN  32
# endif
# if defined(OPENSSL_SYS_WINDOWS)
static int wsa_init_done = 0;
# endif

# ifndef _WIN32
#  include <unistd.h>
#  include <sys/select.h>
# else
#  include <winsock.h> /* for type fd_set */
# endif

# ifndef OPENSSL_NO_DEPRECATED_1_1_0
int BIO_get_host_ip(const char *str, unsigned char *ip)
{
    BIO_ADDRINFO *res = NULL;
    int ret = 0;

    if (BIO_sock_init() != 1)
        return 0;               /* don't generate another error code here */

    if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
        size_t l;

        if (BIO_ADDRINFO_family(res) != AF_INET) {
            BIOerr(BIO_F_BIO_GET_HOST_IP,
                   BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
        } else if (BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l)) {
            /*
             * Because only AF_INET addresses will reach this far, we can assert
             * that l should be 4
             */
            if (ossl_assert(l == 4))
                ret = BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
        }
        BIO_ADDRINFO_free(res);
    } else {
        ERR_add_error_data(2, "host=", str);
    }

    return ret;
}

int BIO_get_port(const char *str, unsigned short *port_ptr)
{
    BIO_ADDRINFO *res = NULL;
    int ret = 0;

    if (str == NULL) {
        BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
        return 0;
    }

    if (BIO_sock_init() != 1)
        return 0;               /* don't generate another error code here */

    if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
        if (BIO_ADDRINFO_family(res) != AF_INET) {
            BIOerr(BIO_F_BIO_GET_PORT,
                   BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
        } else {
            *port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
            ret = 1;
        }
        BIO_ADDRINFO_free(res);
    } else {
        ERR_add_error_data(2, "host=", str);
    }

    return ret;
}
# endif

int BIO_sock_error(int sock)
{
    int j = 0, i;
    socklen_t size = sizeof(j);

    /*
     * Note: under Windows the third parameter is of type (char *) whereas
     * under other systems it is (void *) if you don't have a cast it will
     * choke the compiler: if you do have a cast then you can either go for
     * (char *) or (void *).
     */
    i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
    if (i < 0)
        return get_last_socket_error();
    else
        return j;
}

# ifndef OPENSSL_NO_DEPRECATED_1_1_0
struct hostent *BIO_gethostbyname(const char *name)
{
    /*
     * Caching gethostbyname() results forever is wrong, so we have to let
     * the true gethostbyname() worry about this
     */
    return gethostbyname(name);
}
# endif

int BIO_sock_init(void)
{
# ifdef OPENSSL_SYS_WINDOWS
    static struct WSAData wsa_state;

    if (!wsa_init_done) {
        wsa_init_done = 1;
        memset(&wsa_state, 0, sizeof(wsa_state));
        /*
         * Not making wsa_state available to the rest of the code is formally
         * wrong. But the structures we use are [believed to be] invariable
         * among Winsock DLLs, while API availability is [expected to be]
         * probed at run-time with DSO_global_lookup.
         */
        if (WSAStartup(0x0202, &wsa_state) != 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                           "calling wsastartup()");
            BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
            return -1;
        }
    }
# endif                         /* OPENSSL_SYS_WINDOWS */
# ifdef WATT32
    extern int _watt_do_exit;
    _watt_do_exit = 0;          /* don't make sock_init() call exit() */
    if (sock_init())
        return -1;
# endif

    return 1;
}

void bio_sock_cleanup_int(void)
{
# ifdef OPENSSL_SYS_WINDOWS
    if (wsa_init_done) {
        wsa_init_done = 0;
        WSACleanup();
    }
# endif
}

int BIO_socket_ioctl(int fd, long type, void *arg)
{
    int i;

#  ifdef __DJGPP__
    i = ioctlsocket(fd, type, (char *)arg);
#  else
#   if defined(OPENSSL_SYS_VMS)
    /*-
     * 2011-02-18 SMS.
     * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
     * observe that all the consumers pass in an "unsigned long *",
     * so we arrange a local copy with a short pointer, and use
     * that, instead.
     */
#    if __INITIAL_POINTER_SIZE == 64
#     define ARG arg_32p
#     pragma pointer_size save
#     pragma pointer_size 32
    unsigned long arg_32;
    unsigned long *arg_32p;
#     pragma pointer_size restore
    arg_32p = &arg_32;
    arg_32 = *((unsigned long *)arg);
#    else                       /* __INITIAL_POINTER_SIZE == 64 */
#     define ARG arg
#    endif                      /* __INITIAL_POINTER_SIZE == 64 [else] */
#   else                        /* defined(OPENSSL_SYS_VMS) */
#    define ARG arg
#   endif                       /* defined(OPENSSL_SYS_VMS) [else] */

    i = ioctlsocket(fd, type, ARG);
#  endif                        /* __DJGPP__ */
    if (i < 0)
        ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                       "calling ioctlsocket()");
    return i;
}

# ifndef OPENSSL_NO_DEPRECATED_1_1_0
int BIO_get_accept_socket(char *host, int bind_mode)
{
    int s = INVALID_SOCKET;
    char *h = NULL, *p = NULL;
    BIO_ADDRINFO *res = NULL;

    if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
        return INVALID_SOCKET;

    if (BIO_sock_init() != 1)
        return INVALID_SOCKET;

    if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
        goto err;

    if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
                        BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
        s = INVALID_SOCKET;
        goto err;
    }

    if (!BIO_listen(s, BIO_ADDRINFO_address(res),
                    bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
        BIO_closesocket(s);
        s = INVALID_SOCKET;
    }

 err:
    BIO_ADDRINFO_free(res);
    OPENSSL_free(h);
    OPENSSL_free(p);

    return s;
}

int BIO_accept(int sock, char **ip_port)
{
    BIO_ADDR res;
    int ret = -1;

    ret = BIO_accept_ex(sock, &res, 0);
    if (ret == (int)INVALID_SOCKET) {
        if (BIO_sock_should_retry(ret)) {
            ret = -2;
            goto end;
        }
        ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                       "calling accept()");
        BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
        goto end;
    }

    if (ip_port != NULL) {
        char *host = BIO_ADDR_hostname_string(&res, 1);
        char *port = BIO_ADDR_service_string(&res, 1);
        if (host != NULL && port != NULL)
            *ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
        else
            *ip_port = NULL;

        if (*ip_port == NULL) {
            BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
            BIO_closesocket(ret);
            ret = (int)INVALID_SOCKET;
        } else {
            strcpy(*ip_port, host);
            strcat(*ip_port, ":");
            strcat(*ip_port, port);
        }
        OPENSSL_free(host);
        OPENSSL_free(port);
    }

 end:
    return ret;
}
# endif

int BIO_set_tcp_ndelay(int s, int on)
{
    int ret = 0;
# if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
    int opt;

#  ifdef SOL_TCP
    opt = SOL_TCP;
#  else
#   ifdef IPPROTO_TCP
    opt = IPPROTO_TCP;
#   endif
#  endif

    ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
# endif
    return (ret == 0);
}

int BIO_socket_nbio(int s, int mode)
{
    int ret = -1;
    int l;

    l = mode;
# ifdef FIONBIO
    l = mode;

    ret = BIO_socket_ioctl(s, FIONBIO, &l);
# elif defined(F_GETFL) && defined(F_SETFL) && (defined(O_NONBLOCK) || defined(FNDELAY))
    /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */

    l = fcntl(s, F_GETFL, 0);
    if (l == -1) {
        ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
                       "calling fcntl()");
        ret = -1;
    } else {
#  if defined(O_NONBLOCK)
        l &= ~O_NONBLOCK;
#  else
        l &= ~FNDELAY; /* BSD4.x */
#  endif
        if (mode) {
#  if defined(O_NONBLOCK)
            l |= O_NONBLOCK;
#  else
            l |= FNDELAY; /* BSD4.x */
#  endif
        }
        ret = fcntl(s, F_SETFL, l);

        if (ret < 0) {
            ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
                           "calling fcntl()");
        }
    }
# else
    /* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
    BIOerr(BIO_F_BIO_SOCKET_NBIO, ERR_R_PASSED_INVALID_ARGUMENT);
# endif

    return (ret == 0);
}

int BIO_sock_info(int sock,
                  enum BIO_sock_info_type type, union BIO_sock_info_u *info)
{
    switch (type) {
    case BIO_SOCK_INFO_ADDRESS:
        {
            socklen_t addr_len;
            int ret = 0;
            addr_len = sizeof(*info->addr);
            ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
                              &addr_len);
            if (ret == -1) {
                ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                               "calling getsockname()");
                BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
                return 0;
            }
            if ((size_t)addr_len > sizeof(*info->addr)) {
                BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
                return 0;
            }
        }
        break;
    default:
        BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
        return 0;
    }
    return 1;
}

/* TODO simplify by BIO_socket_wait() further other uses of select() in apps/ */
/*
 * Wait on fd at most until max_time; succeed immediately if max_time == 0.
 * If for_read == 0 then assume to wait for writing, else wait for reading.
 * Returns -1 on error, 0 on timeout, and 1 on success.
 */
int BIO_socket_wait(int fd, int for_read, time_t max_time)
{
    fd_set confds;
    struct timeval tv;
    time_t now;

    if (max_time == 0)
        return 1;

    now = time(NULL);
    if (max_time <= now)
        return 0;

    FD_ZERO(&confds);
    openssl_fdset(fd, &confds);
    tv.tv_usec = 0;
    tv.tv_sec = (long)(max_time - now); /* might overflow */
    return select(fd + 1, for_read ? &confds : NULL,
                  for_read ? NULL : &confds, NULL, &tv);
}
#endif /* !defined(OPENSSL_NO_SOCK) */
Commit	Line	Data
	1	/*
	2	* Copyright 1995-2018 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 "bio_local.h"
	13	#ifndef OPENSSL_NO_SOCK
	14	# define SOCKET_PROTOCOL IPPROTO_TCP
	15	# ifdef SO_MAXCONN
	16	# define MAX_LISTEN SO_MAXCONN
	17	# elif defined(SOMAXCONN)
	18	# define MAX_LISTEN SOMAXCONN
	19	# else
	20	# define MAX_LISTEN 32
	21	# endif
	22	# if defined(OPENSSL_SYS_WINDOWS)
	23	static int wsa_init_done = 0;
	24	# endif
	25
	26	# ifndef _WIN32
	27	# include <unistd.h>
	28	# include <sys/select.h>
	29	# else
	30	# include <winsock.h> /* for type fd_set */
	31	# endif
	32
	33	# ifndef OPENSSL_NO_DEPRECATED_1_1_0
	34	int BIO_get_host_ip(const char str, unsigned char ip)
	35	{
	36	BIO_ADDRINFO *res = NULL;
	37	int ret = 0;
	38
	39	if (BIO_sock_init() != 1)
	40	return 0; /* don't generate another error code here */
	41
	42	if (BIO_lookup(str, NULL, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
	43	size_t l;
	44
	45	if (BIO_ADDRINFO_family(res) != AF_INET) {
	46	BIOerr(BIO_F_BIO_GET_HOST_IP,
	47	BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
	48	} else if (BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), NULL, &l)) {
	49	/*
	50	* Because only AF_INET addresses will reach this far, we can assert
	51	* that l should be 4
	52	*/
	53	if (ossl_assert(l == 4))
	54	ret = BIO_ADDR_rawaddress(BIO_ADDRINFO_address(res), ip, &l);
	55	}
	56	BIO_ADDRINFO_free(res);
	57	} else {
	58	ERR_add_error_data(2, "host=", str);
	59	}
	60
	61	return ret;
	62	}
	63
	64	int BIO_get_port(const char str, unsigned short port_ptr)
	65	{
	66	BIO_ADDRINFO *res = NULL;
	67	int ret = 0;
	68
	69	if (str == NULL) {
	70	BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
	71	return 0;
	72	}
	73
	74	if (BIO_sock_init() != 1)
	75	return 0; /* don't generate another error code here */
	76
	77	if (BIO_lookup(NULL, str, BIO_LOOKUP_CLIENT, AF_INET, SOCK_STREAM, &res)) {
	78	if (BIO_ADDRINFO_family(res) != AF_INET) {
	79	BIOerr(BIO_F_BIO_GET_PORT,
	80	BIO_R_ADDRINFO_ADDR_IS_NOT_AF_INET);
	81	} else {
	82	*port_ptr = ntohs(BIO_ADDR_rawport(BIO_ADDRINFO_address(res)));
	83	ret = 1;
	84	}
	85	BIO_ADDRINFO_free(res);
	86	} else {
	87	ERR_add_error_data(2, "host=", str);
	88	}
	89
	90	return ret;
	91	}
	92	# endif
	93
	94	int BIO_sock_error(int sock)
	95	{
	96	int j = 0, i;
	97	socklen_t size = sizeof(j);
	98
	99	/*
	100	* Note: under Windows the third parameter is of type (char *) whereas
	101	* under other systems it is (void *) if you don't have a cast it will
	102	* choke the compiler: if you do have a cast then you can either go for
	103	* (char ) or (void ).
	104	*/
	105	i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, &size);
	106	if (i < 0)
	107	return get_last_socket_error();
	108	else
	109	return j;
	110	}
	111
	112	# ifndef OPENSSL_NO_DEPRECATED_1_1_0
	113	struct hostent BIO_gethostbyname(const char name)
	114	{
	115	/*
	116	* Caching gethostbyname() results forever is wrong, so we have to let
	117	* the true gethostbyname() worry about this
	118	*/
	119	return gethostbyname(name);
	120	}
	121	# endif
	122
	123	int BIO_sock_init(void)
	124	{
	125	# ifdef OPENSSL_SYS_WINDOWS
	126	static struct WSAData wsa_state;
	127
	128	if (!wsa_init_done) {
	129	wsa_init_done = 1;
	130	memset(&wsa_state, 0, sizeof(wsa_state));
	131	/*
	132	* Not making wsa_state available to the rest of the code is formally
	133	* wrong. But the structures we use are [believed to be] invariable
	134	* among Winsock DLLs, while API availability is [expected to be]
	135	* probed at run-time with DSO_global_lookup.
	136	*/
	137	if (WSAStartup(0x0202, &wsa_state) != 0) {
	138	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
	139	"calling wsastartup()");
	140	BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
	141	return -1;
	142	}
	143	}
	144	# endif /* OPENSSL_SYS_WINDOWS */
	145	# ifdef WATT32
	146	extern int _watt_do_exit;
	147	_watt_do_exit = 0; /* don't make sock_init() call exit() */
	148	if (sock_init())
	149	return -1;
	150	# endif
	151
	152	return 1;
	153	}
	154
	155	void bio_sock_cleanup_int(void)
	156	{
	157	# ifdef OPENSSL_SYS_WINDOWS
	158	if (wsa_init_done) {
	159	wsa_init_done = 0;
	160	WSACleanup();
	161	}
	162	# endif
	163	}
	164
	165	int BIO_socket_ioctl(int fd, long type, void *arg)
	166	{
	167	int i;
	168
	169	# ifdef __DJGPP__
	170	i = ioctlsocket(fd, type, (char *)arg);
	171	# else
	172	# if defined(OPENSSL_SYS_VMS)
	173	/*-
	174	* 2011-02-18 SMS.
	175	* VMS ioctl() can't tolerate a 64-bit "void *arg", but we
	176	* observe that all the consumers pass in an "unsigned long *",
	177	* so we arrange a local copy with a short pointer, and use
	178	* that, instead.
	179	*/
	180	# if __INITIAL_POINTER_SIZE == 64
	181	# define ARG arg_32p
	182	# pragma pointer_size save
	183	# pragma pointer_size 32
	184	unsigned long arg_32;
	185	unsigned long *arg_32p;
	186	# pragma pointer_size restore
	187	arg_32p = &arg_32;
	188	arg_32 = ((unsigned long )arg);
	189	# else /* __INITIAL_POINTER_SIZE == 64 */
	190	# define ARG arg
	191	# endif /* __INITIAL_POINTER_SIZE == 64 [else] */
	192	# else /* defined(OPENSSL_SYS_VMS) */
	193	# define ARG arg
	194	# endif /* defined(OPENSSL_SYS_VMS) [else] */
	195
	196	i = ioctlsocket(fd, type, ARG);
	197	# endif /* __DJGPP__ */
	198	if (i < 0)
	199	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
	200	"calling ioctlsocket()");
	201	return i;
	202	}
	203
	204	# ifndef OPENSSL_NO_DEPRECATED_1_1_0
	205	int BIO_get_accept_socket(char *host, int bind_mode)
	206	{
	207	int s = INVALID_SOCKET;
	208	char h = NULL, p = NULL;
	209	BIO_ADDRINFO *res = NULL;
	210
	211	if (!BIO_parse_hostserv(host, &h, &p, BIO_PARSE_PRIO_SERV))
	212	return INVALID_SOCKET;
	213
	214	if (BIO_sock_init() != 1)
	215	return INVALID_SOCKET;
	216
	217	if (BIO_lookup(h, p, BIO_LOOKUP_SERVER, AF_UNSPEC, SOCK_STREAM, &res) != 0)
	218	goto err;
	219
	220	if ((s = BIO_socket(BIO_ADDRINFO_family(res), BIO_ADDRINFO_socktype(res),
	221	BIO_ADDRINFO_protocol(res), 0)) == INVALID_SOCKET) {
	222	s = INVALID_SOCKET;
	223	goto err;
	224	}
	225
	226	if (!BIO_listen(s, BIO_ADDRINFO_address(res),
	227	bind_mode ? BIO_SOCK_REUSEADDR : 0)) {
	228	BIO_closesocket(s);
	229	s = INVALID_SOCKET;
	230	}
	231
	232	err:
	233	BIO_ADDRINFO_free(res);
	234	OPENSSL_free(h);
	235	OPENSSL_free(p);
	236
	237	return s;
	238	}
	239
	240	int BIO_accept(int sock, char **ip_port)
	241	{
	242	BIO_ADDR res;
	243	int ret = -1;
	244
	245	ret = BIO_accept_ex(sock, &res, 0);
	246	if (ret == (int)INVALID_SOCKET) {
	247	if (BIO_sock_should_retry(ret)) {
	248	ret = -2;
	249	goto end;
	250	}
	251	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
	252	"calling accept()");
	253	BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
	254	goto end;
	255	}
	256
	257	if (ip_port != NULL) {
	258	char *host = BIO_ADDR_hostname_string(&res, 1);
	259	char *port = BIO_ADDR_service_string(&res, 1);
	260	if (host != NULL && port != NULL)
	261	*ip_port = OPENSSL_zalloc(strlen(host) + strlen(port) + 2);
	262	else
	263	*ip_port = NULL;
	264
	265	if (*ip_port == NULL) {
	266	BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
	267	BIO_closesocket(ret);
	268	ret = (int)INVALID_SOCKET;
	269	} else {
	270	strcpy(*ip_port, host);
	271	strcat(*ip_port, ":");
	272	strcat(*ip_port, port);
	273	}
	274	OPENSSL_free(host);
	275	OPENSSL_free(port);
	276	}
	277
	278	end:
	279	return ret;
	280	}
	281	# endif
	282
	283	int BIO_set_tcp_ndelay(int s, int on)
	284	{
	285	int ret = 0;
	286	# if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) \|\| defined(SOL_TCP))
	287	int opt;
	288
	289	# ifdef SOL_TCP
	290	opt = SOL_TCP;
	291	# else
	292	# ifdef IPPROTO_TCP
	293	opt = IPPROTO_TCP;
	294	# endif
	295	# endif
	296
	297	ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
	298	# endif
	299	return (ret == 0);
	300	}
	301
	302	int BIO_socket_nbio(int s, int mode)
	303	{
	304	int ret = -1;
	305	int l;
	306
	307	l = mode;
	308	# ifdef FIONBIO
	309	l = mode;
	310
	311	ret = BIO_socket_ioctl(s, FIONBIO, &l);
	312	# elif defined(F_GETFL) && defined(F_SETFL) && (defined(O_NONBLOCK) \|\| defined(FNDELAY))
	313	/* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
	314
	315	l = fcntl(s, F_GETFL, 0);
	316	if (l == -1) {
	317	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
	318	"calling fcntl()");
	319	ret = -1;
	320	} else {
	321	# if defined(O_NONBLOCK)
	322	l &= ~O_NONBLOCK;
	323	# else
	324	l &= ~FNDELAY; /* BSD4.x */
	325	# endif
	326	if (mode) {
	327	# if defined(O_NONBLOCK)
	328	l \|= O_NONBLOCK;
	329	# else
	330	l \|= FNDELAY; /* BSD4.x */
	331	# endif
	332	}
	333	ret = fcntl(s, F_SETFL, l);
	334
	335	if (ret < 0) {
	336	ERR_raise_data(ERR_LIB_SYS, get_last_sys_error(),
	337	"calling fcntl()");
	338	}
	339	}
	340	# else
	341	/* make sure this call always pushes an error level; BIO_socket_ioctl() does so, so we do too. */
	342	BIOerr(BIO_F_BIO_SOCKET_NBIO, ERR_R_PASSED_INVALID_ARGUMENT);
	343	# endif
	344
	345	return (ret == 0);
	346	}
	347
	348	int BIO_sock_info(int sock,
	349	enum BIO_sock_info_type type, union BIO_sock_info_u *info)
	350	{
	351	switch (type) {
	352	case BIO_SOCK_INFO_ADDRESS:
	353	{
	354	socklen_t addr_len;
	355	int ret = 0;
	356	addr_len = sizeof(*info->addr);
	357	ret = getsockname(sock, BIO_ADDR_sockaddr_noconst(info->addr),
	358	&addr_len);
	359	if (ret == -1) {
	360	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
	361	"calling getsockname()");
	362	BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_ERROR);
	363	return 0;
	364	}
	365	if ((size_t)addr_len > sizeof(*info->addr)) {
	366	BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_GETSOCKNAME_TRUNCATED_ADDRESS);
	367	return 0;
	368	}
	369	}
	370	break;
	371	default:
	372	BIOerr(BIO_F_BIO_SOCK_INFO, BIO_R_UNKNOWN_INFO_TYPE);
	373	return 0;
	374	}
	375	return 1;
	376	}
	377
	378	/* TODO simplify by BIO_socket_wait() further other uses of select() in apps/ */
	379	/*
	380	* Wait on fd at most until max_time; succeed immediately if max_time == 0.
	381	* If for_read == 0 then assume to wait for writing, else wait for reading.
	382	* Returns -1 on error, 0 on timeout, and 1 on success.
	383	*/
	384	int BIO_socket_wait(int fd, int for_read, time_t max_time)
	385	{
	386	fd_set confds;
	387	struct timeval tv;
	388	time_t now;
	389
	390	if (max_time == 0)
	391	return 1;
	392
	393	now = time(NULL);
	394	if (max_time <= now)
	395	return 0;
	396
	397	FD_ZERO(&confds);
	398	openssl_fdset(fd, &confds);
	399	tv.tv_usec = 0;
	400	tv.tv_sec = (long)(max_time - now); /* might overflow */
	401	return select(fd + 1, for_read ? &confds : NULL,
	402	for_read ? NULL : &confds, NULL, &tv);
	403	}
	404	#endif /* !defined(OPENSSL_NO_SOCK) */