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

/*
 * Copyright 1995-2020 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 <errno.h>

#include "bio_local.h"
#include "internal/ktls.h"

#ifndef OPENSSL_NO_SOCK

typedef struct bio_connect_st {
    int state;
    int connect_family;
    char *param_hostname;
    char *param_service;
    int connect_mode;
# ifndef OPENSSL_NO_KTLS
    unsigned char record_type;
# endif

    BIO_ADDRINFO *addr_first;
    const BIO_ADDRINFO *addr_iter;
    /*
     * int socket; this will be kept in bio->num so that it is compatible
     * with the bss_sock bio
     */
    /*
     * called when the connection is initially made callback(BIO,state,ret);
     * The callback should return 'ret'.  state is for compatibility with the
     * ssl info_callback
     */
    BIO_info_cb *info_callback;
} BIO_CONNECT;

static int conn_write(BIO *h, const char *buf, int num);
static int conn_read(BIO *h, char *buf, int size);
static int conn_puts(BIO *h, const char *str);
static long conn_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int conn_new(BIO *h);
static int conn_free(BIO *data);
static long conn_callback_ctrl(BIO *h, int cmd, BIO_info_cb *);

static int conn_state(BIO *b, BIO_CONNECT *c);
static void conn_close_socket(BIO *data);
BIO_CONNECT *BIO_CONNECT_new(void);
void BIO_CONNECT_free(BIO_CONNECT *a);

#define BIO_CONN_S_BEFORE                1
#define BIO_CONN_S_GET_ADDR              2
#define BIO_CONN_S_CREATE_SOCKET         3
#define BIO_CONN_S_CONNECT               4
#define BIO_CONN_S_OK                    5
#define BIO_CONN_S_BLOCKED_CONNECT       6
#define BIO_CONN_S_CONNECT_ERROR         7

static const BIO_METHOD methods_connectp = {
    BIO_TYPE_CONNECT,
    "socket connect",
    /* TODO: Convert to new style write function */
    bwrite_conv,
    conn_write,
    /* TODO: Convert to new style read function */
    bread_conv,
    conn_read,
    conn_puts,
    NULL,                       /* conn_gets, */
    conn_ctrl,
    conn_new,
    conn_free,
    conn_callback_ctrl,
};

static int conn_state(BIO *b, BIO_CONNECT *c)
{
    int ret = -1, i;
    BIO_info_cb *cb = NULL;

    if (c->info_callback != NULL)
        cb = c->info_callback;

    for (;;) {
        switch (c->state) {
        case BIO_CONN_S_BEFORE:
            if (c->param_hostname == NULL && c->param_service == NULL) {
                BIOerr(BIO_F_CONN_STATE, BIO_R_NO_HOSTNAME_OR_SERVICE_SPECIFIED);
                ERR_add_error_data(4,
                                   "hostname=", c->param_hostname,
                                   " service=", c->param_service);
                goto exit_loop;
            }
            c->state = BIO_CONN_S_GET_ADDR;
            break;

        case BIO_CONN_S_GET_ADDR:
            {
                int family = AF_UNSPEC;
                switch (c->connect_family) {
                case BIO_FAMILY_IPV6:
                    if (1) { /* This is a trick we use to avoid bit rot.
                              * at least the "else" part will always be
                              * compiled.
                              */
#ifdef AF_INET6
                        family = AF_INET6;
                    } else {
#endif
                        BIOerr(BIO_F_CONN_STATE, BIO_R_UNAVAILABLE_IP_FAMILY);
                        goto exit_loop;
                    }
                    break;
                case BIO_FAMILY_IPV4:
                    family = AF_INET;
                    break;
                case BIO_FAMILY_IPANY:
                    family = AF_UNSPEC;
                    break;
                default:
                    BIOerr(BIO_F_CONN_STATE, BIO_R_UNSUPPORTED_IP_FAMILY);
                    goto exit_loop;
                }
                if (BIO_lookup(c->param_hostname, c->param_service,
                               BIO_LOOKUP_CLIENT,
                               family, SOCK_STREAM, &c->addr_first) == 0)
                    goto exit_loop;
            }
            if (c->addr_first == NULL) {
                BIOerr(BIO_F_CONN_STATE, BIO_R_LOOKUP_RETURNED_NOTHING);
                goto exit_loop;
            }
            c->addr_iter = c->addr_first;
            c->state = BIO_CONN_S_CREATE_SOCKET;
            break;

        case BIO_CONN_S_CREATE_SOCKET:
            ret = BIO_socket(BIO_ADDRINFO_family(c->addr_iter),
                             BIO_ADDRINFO_socktype(c->addr_iter),
                             BIO_ADDRINFO_protocol(c->addr_iter), 0);
            if (ret == (int)INVALID_SOCKET) {
                ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                               "calling socket(%s, %s)",
                               c->param_hostname, c->param_service);
                BIOerr(BIO_F_CONN_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET);
                goto exit_loop;
            }
            b->num = ret;
            c->state = BIO_CONN_S_CONNECT;
            break;

        case BIO_CONN_S_CONNECT:
            BIO_clear_retry_flags(b);
            ret = BIO_connect(b->num, BIO_ADDRINFO_address(c->addr_iter),
                              BIO_SOCK_KEEPALIVE | c->connect_mode);
            b->retry_reason = 0;
            if (ret == 0) {
                if (BIO_sock_should_retry(ret)) {
                    BIO_set_retry_special(b);
                    c->state = BIO_CONN_S_BLOCKED_CONNECT;
                    b->retry_reason = BIO_RR_CONNECT;
                    ERR_clear_error();
                } else if ((c->addr_iter = BIO_ADDRINFO_next(c->addr_iter))
                           != NULL) {
                    /*
                     * if there are more addresses to try, do that first
                     */
                    BIO_closesocket(b->num);
                    c->state = BIO_CONN_S_CREATE_SOCKET;
                    ERR_clear_error();
                    break;
                } else {
                    ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
                                   "calling connect(%s, %s)",
                                    c->param_hostname, c->param_service);
                    c->state = BIO_CONN_S_CONNECT_ERROR;
                    break;
                }
                goto exit_loop;
            } else {
                c->state = BIO_CONN_S_OK;
            }
            break;

        case BIO_CONN_S_BLOCKED_CONNECT:
            i = BIO_sock_error(b->num);
            if (i != 0) {
                BIO_clear_retry_flags(b);
                if ((c->addr_iter = BIO_ADDRINFO_next(c->addr_iter)) != NULL) {
                    /*
                     * if there are more addresses to try, do that first
                     */
                    BIO_closesocket(b->num);
                    c->state = BIO_CONN_S_CREATE_SOCKET;
                    ERR_clear_error();
                    break;
                }
                ERR_raise_data(ERR_LIB_SYS, i,
                               "calling connect(%s, %s)",
                                c->param_hostname, c->param_service);
                BIOerr(BIO_F_CONN_STATE, BIO_R_NBIO_CONNECT_ERROR);
                ret = 0;
                goto exit_loop;
            } else
                c->state = BIO_CONN_S_OK;
            break;

        case BIO_CONN_S_CONNECT_ERROR:
            BIOerr(BIO_F_CONN_STATE, BIO_R_CONNECT_ERROR);
            ret = 0;
            goto exit_loop;

        case BIO_CONN_S_OK:
            ret = 1;
            goto exit_loop;
        default:
            /* abort(); */
            goto exit_loop;
        }

        if (cb != NULL) {
            if ((ret = cb((BIO *)b, c->state, ret)) == 0)
                goto end;
        }
    }

    /* Loop does not exit */
 exit_loop:
    if (cb != NULL)
        ret = cb((BIO *)b, c->state, ret);
 end:
    return ret;
}

BIO_CONNECT *BIO_CONNECT_new(void)
{
    BIO_CONNECT *ret;

    if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
        BIOerr(BIO_F_BIO_CONNECT_NEW, ERR_R_MALLOC_FAILURE);
        return NULL;
    }
    ret->state = BIO_CONN_S_BEFORE;
    ret->connect_family = BIO_FAMILY_IPANY;
    return ret;
}

void BIO_CONNECT_free(BIO_CONNECT *a)
{
    if (a == NULL)
        return;
    OPENSSL_free(a->param_hostname);
    OPENSSL_free(a->param_service);
    BIO_ADDRINFO_free(a->addr_first);
    OPENSSL_free(a);
}

const BIO_METHOD *BIO_s_connect(void)
{
    return &methods_connectp;
}

static int conn_new(BIO *bi)
{
    bi->init = 0;
    bi->num = (int)INVALID_SOCKET;
    bi->flags = 0;
    if ((bi->ptr = (char *)BIO_CONNECT_new()) == NULL)
        return 0;
    else
        return 1;
}

static void conn_close_socket(BIO *bio)
{
    BIO_CONNECT *c;

    c = (BIO_CONNECT *)bio->ptr;
    if (bio->num != (int)INVALID_SOCKET) {
        /* Only do a shutdown if things were established */
        if (c->state == BIO_CONN_S_OK)
            shutdown(bio->num, 2);
        BIO_closesocket(bio->num);
        bio->num = (int)INVALID_SOCKET;
    }
}

static int conn_free(BIO *a)
{
    BIO_CONNECT *data;

    if (a == NULL)
        return 0;
    data = (BIO_CONNECT *)a->ptr;

    if (a->shutdown) {
        conn_close_socket(a);
        BIO_CONNECT_free(data);
        a->ptr = NULL;
        a->flags = 0;
        a->init = 0;
    }
    return 1;
}

static int conn_read(BIO *b, char *out, int outl)
{
    int ret = 0;
    BIO_CONNECT *data;

    data = (BIO_CONNECT *)b->ptr;
    if (data->state != BIO_CONN_S_OK) {
        ret = conn_state(b, data);
        if (ret <= 0)
            return ret;
    }

    if (out != NULL) {
        clear_socket_error();
# ifndef OPENSSL_NO_KTLS
        if (BIO_get_ktls_recv(b))
            ret = ktls_read_record(b->num, out, outl);
        else
# endif
            ret = readsocket(b->num, out, outl);
        BIO_clear_retry_flags(b);
        if (ret <= 0) {
            if (BIO_sock_should_retry(ret))
                BIO_set_retry_read(b);
            else if (ret == 0)
                b->flags |= BIO_FLAGS_IN_EOF;
        }
    }
    return ret;
}

static int conn_write(BIO *b, const char *in, int inl)
{
    int ret;
    BIO_CONNECT *data;

    data = (BIO_CONNECT *)b->ptr;
    if (data->state != BIO_CONN_S_OK) {
        ret = conn_state(b, data);
        if (ret <= 0)
            return ret;
    }

    clear_socket_error();
# ifndef OPENSSL_NO_KTLS
    if (BIO_should_ktls_ctrl_msg_flag(b)) {
        ret = ktls_send_ctrl_message(b->num, data->record_type, in, inl);
        if (ret >= 0) {
            ret = inl;
            BIO_clear_ktls_ctrl_msg_flag(b);
        }
    } else
# endif
        ret = writesocket(b->num, in, inl);
    BIO_clear_retry_flags(b);
    if (ret <= 0) {
        if (BIO_sock_should_retry(ret))
            BIO_set_retry_write(b);
    }
    return ret;
}

static long conn_ctrl(BIO *b, int cmd, long num, void *ptr)
{
    BIO *dbio;
    int *ip;
    const char **pptr = NULL;
    long ret = 1;
    BIO_CONNECT *data;
# ifndef OPENSSL_NO_KTLS
#  ifdef __FreeBSD__
    struct tls_enable *crypto_info;
#  else
    struct tls12_crypto_info_aes_gcm_128 *crypto_info;
#  endif
# endif

    data = (BIO_CONNECT *)b->ptr;

    switch (cmd) {
    case BIO_CTRL_RESET:
        ret = 0;
        data->state = BIO_CONN_S_BEFORE;
        conn_close_socket(b);
        BIO_ADDRINFO_free(data->addr_first);
        data->addr_first = NULL;
        b->flags = 0;
        break;
    case BIO_C_DO_STATE_MACHINE:
        /* use this one to start the connection */
        if (data->state != BIO_CONN_S_OK)
            ret = (long)conn_state(b, data);
        else
            ret = 1;
        break;
    case BIO_C_GET_CONNECT:
        if (ptr != NULL) {
            pptr = (const char **)ptr;
            if (num == 0) {
                *pptr = data->param_hostname;
            } else if (num == 1) {
                *pptr = data->param_service;
            } else if (num == 2) {
                *pptr = (const char *)BIO_ADDRINFO_address(data->addr_iter);
            } else if (num == 3) {
                switch (BIO_ADDRINFO_family(data->addr_iter)) {
# ifdef AF_INET6
                case AF_INET6:
                    ret = BIO_FAMILY_IPV6;
                    break;
# endif
                case AF_INET:
                    ret = BIO_FAMILY_IPV4;
                    break;
                case 0:
                    ret = data->connect_family;
                    break;
                default:
                    ret = -1;
                    break;
                }
            } else {
                ret = 0;
            }
        } else {
            ret = 0;
        }
        break;
    case BIO_C_SET_CONNECT:
        if (ptr != NULL) {
            b->init = 1;
            if (num == 0) {
                char *hold_service = data->param_service;
                /* We affect the hostname regardless.  However, the input
                 * string might contain a host:service spec, so we must
                 * parse it, which might or might not affect the service
                 */
                OPENSSL_free(data->param_hostname);
                data->param_hostname = NULL;
                ret = BIO_parse_hostserv(ptr,
                                         &data->param_hostname,
                                         &data->param_service,
                                         BIO_PARSE_PRIO_HOST);
                if (hold_service != data->param_service)
                    OPENSSL_free(hold_service);
            } else if (num == 1) {
                OPENSSL_free(data->param_service);
                data->param_service = OPENSSL_strdup(ptr);
            } else if (num == 2) {
                const BIO_ADDR *addr = (const BIO_ADDR *)ptr;
                if (ret) {
                    data->param_hostname = BIO_ADDR_hostname_string(addr, 1);
                    data->param_service = BIO_ADDR_service_string(addr, 1);
                    BIO_ADDRINFO_free(data->addr_first);
                    data->addr_first = NULL;
                    data->addr_iter = NULL;
                }
            } else if (num == 3) {
                data->connect_family = *(int *)ptr;
            } else {
                ret = 0;
            }
        }
        break;
    case BIO_C_SET_NBIO:
        if (num != 0)
            data->connect_mode |= BIO_SOCK_NONBLOCK;
        else
            data->connect_mode &= ~BIO_SOCK_NONBLOCK;
        break;
    case BIO_C_SET_CONNECT_MODE:
        data->connect_mode = (int)num;
        break;
    case BIO_C_GET_FD:
        if (b->init) {
            ip = (int *)ptr;
            if (ip != NULL)
                *ip = b->num;
            ret = b->num;
        } else
            ret = -1;
        break;
    case BIO_CTRL_GET_CLOSE:
        ret = b->shutdown;
        break;
    case BIO_CTRL_SET_CLOSE:
        b->shutdown = (int)num;
        break;
    case BIO_CTRL_PENDING:
    case BIO_CTRL_WPENDING:
        ret = 0;
        break;
    case BIO_CTRL_FLUSH:
        break;
    case BIO_CTRL_DUP:
        {
            dbio = (BIO *)ptr;
            if (data->param_hostname)
                BIO_set_conn_hostname(dbio, data->param_hostname);
            if (data->param_service)
                BIO_set_conn_port(dbio, data->param_service);
            BIO_set_conn_ip_family(dbio, data->connect_family);
            BIO_set_conn_mode(dbio, data->connect_mode);
            /*
             * FIXME: the cast of the function seems unlikely to be a good
             * idea
             */
            (void)BIO_set_info_callback(dbio, data->info_callback);
        }
        break;
    case BIO_CTRL_SET_CALLBACK:
        ret = 0; /* use callback ctrl */
        break;
    case BIO_CTRL_GET_CALLBACK:
        {
            BIO_info_cb **fptr;

            fptr = (BIO_info_cb **)ptr;
            *fptr = data->info_callback;
        }
        break;
    case BIO_CTRL_EOF:
        ret = (b->flags & BIO_FLAGS_IN_EOF) != 0 ? 1 : 0;
        break;
# ifndef OPENSSL_NO_KTLS
    case BIO_CTRL_SET_KTLS:
#  ifdef __FreeBSD__
        crypto_info = (struct tls_enable *)ptr;
#  else
        crypto_info = (struct tls12_crypto_info_aes_gcm_128 *)ptr;
#  endif
        ret = ktls_start(b->num, crypto_info, sizeof(*crypto_info), num);
        if (ret)
            BIO_set_ktls_flag(b, num);
        break;
    case BIO_CTRL_GET_KTLS_SEND:
        return BIO_should_ktls_flag(b, 1);
    case BIO_CTRL_GET_KTLS_RECV:
        return BIO_should_ktls_flag(b, 0);
    case BIO_CTRL_SET_KTLS_TX_SEND_CTRL_MSG:
        BIO_set_ktls_ctrl_msg_flag(b);
        data->record_type = num;
        ret = 0;
        break;
    case BIO_CTRL_CLEAR_KTLS_TX_CTRL_MSG:
        BIO_clear_ktls_ctrl_msg_flag(b);
        ret = 0;
        break;
# endif
    default:
        ret = 0;
        break;
    }
    return ret;
}

static long conn_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
{
    long ret = 1;
    BIO_CONNECT *data;

    data = (BIO_CONNECT *)b->ptr;

    switch (cmd) {
    case BIO_CTRL_SET_CALLBACK:
        {
            data->info_callback = fp;
        }
        break;
    default:
        ret = 0;
        break;
    }
    return ret;
}

static int conn_puts(BIO *bp, const char *str)
{
    int n, ret;

    n = strlen(str);
    ret = conn_write(bp, str, n);
    return ret;
}

BIO *BIO_new_connect(const char *str)
{
    BIO *ret;

    ret = BIO_new(BIO_s_connect());
    if (ret == NULL)
        return NULL;
    if (BIO_set_conn_hostname(ret, str))
        return ret;
    BIO_free(ret);
    return NULL;
}

#endif
Commit	Line	Data
b1322259	1	/*
33388b44	2	* Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
d02b48c6	3	*
09abbca1	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
b1322259 RS	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
d02b48c6 RE	8	*/
d02b48c6 RE	9
d02b48c6 RE	10	#include <stdio.h>
d02b48c6 RE	11	#include <errno.h>
d02b48c6	12
706457b7	13	#include "bio_local.h"
b1f79e7c	14	#include "internal/ktls.h"
b00b2124	15
417be660	16	#ifndef OPENSSL_NO_SOCK
0f113f3e MC	17
	18	typedef struct bio_connect_st {
	19	int state;
417be660	20	int connect_family;
0f113f3e	21	char *param_hostname;
417be660 RL	22	char *param_service;
417be660 RL	23	int connect_mode;
b1f79e7c JB	24	# ifndef OPENSSL_NO_KTLS
	25	unsigned char record_type;
	26	# endif
417be660 RL	27
	28	BIO_ADDRINFO *addr_first;
	29	const BIO_ADDRINFO *addr_iter;
0f113f3e MC	30	/*
	31	* int socket; this will be kept in bio->num so that it is compatible
	32	* with the bss_sock bio
	33	*/
	34	/*
	35	* called when the connection is initially made callback(BIO,state,ret);
	36	* The callback should return 'ret'. state is for compatibility with the
	37	* ssl info_callback
	38	*/
fce78bd4	39	BIO_info_cb *info_callback;
0f113f3e	40	} BIO_CONNECT;
d02b48c6	41
0e1c0612 UM	42	static int conn_write(BIO h, const char buf, int num);
	43	static int conn_read(BIO h, char buf, int size);
	44	static int conn_puts(BIO h, const char str);
	45	static long conn_ctrl(BIO h, int cmd, long arg1, void arg2);
d02b48c6 RE	46	static int conn_new(BIO *h);
d02b48c6 RE	47	static int conn_free(BIO *data);
fce78bd4	48	static long conn_callback_ctrl(BIO h, int cmd, BIO_info_cb );
d02b48c6 RE	49
	50	static int conn_state(BIO b, BIO_CONNECT c);
	51	static void conn_close_socket(BIO *data);
0f113f3e	52	BIO_CONNECT *BIO_CONNECT_new(void);
d02b48c6 RE	53	void BIO_CONNECT_free(BIO_CONNECT *a);
d02b48c6 RE	54
417be660 RL	55	#define BIO_CONN_S_BEFORE 1
	56	#define BIO_CONN_S_GET_ADDR 2
	57	#define BIO_CONN_S_CREATE_SOCKET 3
	58	#define BIO_CONN_S_CONNECT 4
	59	#define BIO_CONN_S_OK 5
	60	#define BIO_CONN_S_BLOCKED_CONNECT 6
181f5185	61	#define BIO_CONN_S_CONNECT_ERROR 7
417be660	62
04f6b0fd	63	static const BIO_METHOD methods_connectp = {
0f113f3e MC	64	BIO_TYPE_CONNECT,
0f113f3e MC	65	"socket connect",
3befffa3 MC	66	/* TODO: Convert to new style write function */
3befffa3 MC	67	bwrite_conv,
0f113f3e	68	conn_write,
d07aee2c MC	69	/* TODO: Convert to new style read function */
d07aee2c MC	70	bread_conv,
0f113f3e MC	71	conn_read,
0f113f3e MC	72	conn_puts,
b4ff6622	73	NULL, /* conn_gets, */
0f113f3e MC	74	conn_ctrl,
	75	conn_new,
	76	conn_free,
	77	conn_callback_ctrl,
	78	};
d02b48c6	79
6b691a5c	80	static int conn_state(BIO b, BIO_CONNECT c)
0f113f3e MC	81	{
0f113f3e MC	82	int ret = -1, i;
fce78bd4	83	BIO_info_cb *cb = NULL;
0f113f3e MC	84
	85	if (c->info_callback != NULL)
	86	cb = c->info_callback;
	87
	88	for (;;) {
	89	switch (c->state) {
	90	case BIO_CONN_S_BEFORE:
417be660 RL	91	if (c->param_hostname == NULL && c->param_service == NULL) {
	92	BIOerr(BIO_F_CONN_STATE, BIO_R_NO_HOSTNAME_OR_SERVICE_SPECIFIED);
	93	ERR_add_error_data(4,
	94	"hostname=", c->param_hostname,
	95	" service=", c->param_service);
0f113f3e MC	96	goto exit_loop;
0f113f3e MC	97	}
417be660 RL	98	c->state = BIO_CONN_S_GET_ADDR;
417be660 RL	99	break;
0f113f3e	100
417be660 RL	101	case BIO_CONN_S_GET_ADDR:
	102	{
	103	int family = AF_UNSPEC;
	104	switch (c->connect_family) {
	105	case BIO_FAMILY_IPV6:
	106	if (1) { /* This is a trick we use to avoid bit rot.
	107	* at least the "else" part will always be
	108	* compiled.
	109	*/
	110	#ifdef AF_INET6
	111	family = AF_INET6;
	112	} else {
	113	#endif
	114	BIOerr(BIO_F_CONN_STATE, BIO_R_UNAVAILABLE_IP_FAMILY);
	115	goto exit_loop;
	116	}
	117	break;
	118	case BIO_FAMILY_IPV4:
	119	family = AF_INET;
	120	break;
	121	case BIO_FAMILY_IPANY:
	122	family = AF_UNSPEC;
	123	break;
	124	default:
	125	BIOerr(BIO_F_CONN_STATE, BIO_R_UNSUPPORTED_IP_FAMILY);
	126	goto exit_loop;
0f113f3e	127	}
417be660 RL	128	if (BIO_lookup(c->param_hostname, c->param_service,
	129	BIO_LOOKUP_CLIENT,
	130	family, SOCK_STREAM, &c->addr_first) == 0)
	131	goto exit_loop;
0f113f3e	132	}
417be660 RL	133	if (c->addr_first == NULL) {
417be660 RL	134	BIOerr(BIO_F_CONN_STATE, BIO_R_LOOKUP_RETURNED_NOTHING);
0f113f3e MC	135	goto exit_loop;
0f113f3e MC	136	}
417be660	137	c->addr_iter = c->addr_first;
0f113f3e MC	138	c->state = BIO_CONN_S_CREATE_SOCKET;
	139	break;
	140
	141	case BIO_CONN_S_CREATE_SOCKET:
417be660 RL	142	ret = BIO_socket(BIO_ADDRINFO_family(c->addr_iter),
	143	BIO_ADDRINFO_socktype(c->addr_iter),
	144	BIO_ADDRINFO_protocol(c->addr_iter), 0);
b13fdc48	145	if (ret == (int)INVALID_SOCKET) {
ff988500 RS	146	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
	147	"calling socket(%s, %s)",
	148	c->param_hostname, c->param_service);
0f113f3e MC	149	BIOerr(BIO_F_CONN_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET);
	150	goto exit_loop;
	151	}
	152	b->num = ret;
0f113f3e	153	c->state = BIO_CONN_S_CONNECT;
0f113f3e MC	154	break;
	155
	156	case BIO_CONN_S_CONNECT:
	157	BIO_clear_retry_flags(b);
417be660 RL	158	ret = BIO_connect(b->num, BIO_ADDRINFO_address(c->addr_iter),
417be660 RL	159	BIO_SOCK_KEEPALIVE \| c->connect_mode);
0f113f3e	160	b->retry_reason = 0;
a043d0b9	161	if (ret == 0) {
0f113f3e MC	162	if (BIO_sock_should_retry(ret)) {
	163	BIO_set_retry_special(b);
	164	c->state = BIO_CONN_S_BLOCKED_CONNECT;
	165	b->retry_reason = BIO_RR_CONNECT;
417be660 RL	166	ERR_clear_error();
	167	} else if ((c->addr_iter = BIO_ADDRINFO_next(c->addr_iter))
	168	!= NULL) {
	169	/*
	170	* if there are more addresses to try, do that first
	171	*/
	172	BIO_closesocket(b->num);
	173	c->state = BIO_CONN_S_CREATE_SOCKET;
	174	ERR_clear_error();
	175	break;
0f113f3e	176	} else {
ff988500 RS	177	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
	178	"calling connect(%s, %s)",
	179	c->param_hostname, c->param_service);
181f5185 RL	180	c->state = BIO_CONN_S_CONNECT_ERROR;
181f5185 RL	181	break;
0f113f3e MC	182	}
0f113f3e MC	183	goto exit_loop;
417be660	184	} else {
0f113f3e	185	c->state = BIO_CONN_S_OK;
417be660	186	}
0f113f3e MC	187	break;
	188
	189	case BIO_CONN_S_BLOCKED_CONNECT:
	190	i = BIO_sock_error(b->num);
dc18e4dd	191	if (i != 0) {
0f113f3e	192	BIO_clear_retry_flags(b);
dc18e4dd DDO	193	if ((c->addr_iter = BIO_ADDRINFO_next(c->addr_iter)) != NULL) {
	194	/*
	195	* if there are more addresses to try, do that first
	196	*/
	197	BIO_closesocket(b->num);
	198	c->state = BIO_CONN_S_CREATE_SOCKET;
	199	ERR_clear_error();
	200	break;
	201	}
ff988500 RS	202	ERR_raise_data(ERR_LIB_SYS, i,
	203	"calling connect(%s, %s)",
	204	c->param_hostname, c->param_service);
0f113f3e MC	205	BIOerr(BIO_F_CONN_STATE, BIO_R_NBIO_CONNECT_ERROR);
	206	ret = 0;
	207	goto exit_loop;
	208	} else
	209	c->state = BIO_CONN_S_OK;
	210	break;
	211
181f5185 RL	212	case BIO_CONN_S_CONNECT_ERROR:
	213	BIOerr(BIO_F_CONN_STATE, BIO_R_CONNECT_ERROR);
	214	ret = 0;
	215	goto exit_loop;
	216
0f113f3e MC	217	case BIO_CONN_S_OK:
	218	ret = 1;
	219	goto exit_loop;
	220	default:
	221	/* abort(); */
	222	goto exit_loop;
	223	}
	224
	225	if (cb != NULL) {
75ebbd9a	226	if ((ret = cb((BIO *)b, c->state, ret)) == 0)
0f113f3e MC	227	goto end;
	228	}
	229	}
	230
	231	/* Loop does not exit */
	232	exit_loop:
	233	if (cb != NULL)
	234	ret = cb((BIO *)b, c->state, ret);
	235	end:
26a7d938	236	return ret;
0f113f3e	237	}
d02b48c6	238
6b691a5c	239	BIO_CONNECT *BIO_CONNECT_new(void)
0f113f3e MC	240	{
	241	BIO_CONNECT *ret;
	242
f06080cb F	243	if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
f06080cb F	244	BIOerr(BIO_F_BIO_CONNECT_NEW, ERR_R_MALLOC_FAILURE);
26a7d938	245	return NULL;
f06080cb	246	}
0f113f3e	247	ret->state = BIO_CONN_S_BEFORE;
417be660	248	ret->connect_family = BIO_FAMILY_IPANY;
26a7d938	249	return ret;
0f113f3e	250	}
d02b48c6	251
6b691a5c	252	void BIO_CONNECT_free(BIO_CONNECT *a)
0f113f3e	253	{
e6e9170d RS	254	if (a == NULL)
e6e9170d RS	255	return;
b548a1f1	256	OPENSSL_free(a->param_hostname);
417be660 RL	257	OPENSSL_free(a->param_service);
417be660 RL	258	BIO_ADDRINFO_free(a->addr_first);
0f113f3e MC	259	OPENSSL_free(a);
0f113f3e MC	260	}
d02b48c6	261
04f6b0fd	262	const BIO_METHOD *BIO_s_connect(void)
0f113f3e	263	{
26a7d938	264	return &methods_connectp;
0f113f3e	265	}
d02b48c6	266
6b691a5c	267	static int conn_new(BIO *bi)
0f113f3e MC	268	{
0f113f3e MC	269	bi->init = 0;
b13fdc48	270	bi->num = (int)INVALID_SOCKET;
0f113f3e MC	271	bi->flags = 0;
0f113f3e MC	272	if ((bi->ptr = (char *)BIO_CONNECT_new()) == NULL)
26a7d938	273	return 0;
0f113f3e	274	else
208fb891	275	return 1;
0f113f3e	276	}
d02b48c6	277
6b691a5c	278	static void conn_close_socket(BIO *bio)
0f113f3e MC	279	{
	280	BIO_CONNECT *c;
	281
	282	c = (BIO_CONNECT *)bio->ptr;
b13fdc48	283	if (bio->num != (int)INVALID_SOCKET) {
0f113f3e MC	284	/* Only do a shutdown if things were established */
	285	if (c->state == BIO_CONN_S_OK)
	286	shutdown(bio->num, 2);
417be660	287	BIO_closesocket(bio->num);
b13fdc48	288	bio->num = (int)INVALID_SOCKET;
0f113f3e MC	289	}
0f113f3e MC	290	}
d02b48c6	291
6b691a5c	292	static int conn_free(BIO *a)
0f113f3e MC	293	{
	294	BIO_CONNECT *data;
	295
	296	if (a == NULL)
26a7d938	297	return 0;
0f113f3e MC	298	data = (BIO_CONNECT *)a->ptr;
	299
	300	if (a->shutdown) {
	301	conn_close_socket(a);
	302	BIO_CONNECT_free(data);
	303	a->ptr = NULL;
	304	a->flags = 0;
	305	a->init = 0;
	306	}
208fb891	307	return 1;
0f113f3e MC	308	}
0f113f3e MC	309
6b691a5c	310	static int conn_read(BIO b, char out, int outl)
0f113f3e MC	311	{
	312	int ret = 0;
	313	BIO_CONNECT *data;
	314
	315	data = (BIO_CONNECT *)b->ptr;
	316	if (data->state != BIO_CONN_S_OK) {
	317	ret = conn_state(b, data);
	318	if (ret <= 0)
26a7d938	319	return ret;
0f113f3e MC	320	}
	321
	322	if (out != NULL) {
	323	clear_socket_error();
b1f79e7c JB	324	# ifndef OPENSSL_NO_KTLS
	325	if (BIO_get_ktls_recv(b))
	326	ret = ktls_read_record(b->num, out, outl);
	327	else
	328	# endif
	329	ret = readsocket(b->num, out, outl);
0f113f3e MC	330	BIO_clear_retry_flags(b);
	331	if (ret <= 0) {
	332	if (BIO_sock_should_retry(ret))
	333	BIO_set_retry_read(b);
6d53ad6b MC	334	else if (ret == 0)
6d53ad6b MC	335	b->flags \|= BIO_FLAGS_IN_EOF;
0f113f3e MC	336	}
0f113f3e MC	337	}
26a7d938	338	return ret;
0f113f3e	339	}
d02b48c6	340
0e1c0612	341	static int conn_write(BIO b, const char in, int inl)
0f113f3e MC	342	{
	343	int ret;
	344	BIO_CONNECT *data;
	345
	346	data = (BIO_CONNECT *)b->ptr;
	347	if (data->state != BIO_CONN_S_OK) {
	348	ret = conn_state(b, data);
	349	if (ret <= 0)
26a7d938	350	return ret;
0f113f3e MC	351	}
	352
	353	clear_socket_error();
b1f79e7c JB	354	# ifndef OPENSSL_NO_KTLS
	355	if (BIO_should_ktls_ctrl_msg_flag(b)) {
	356	ret = ktls_send_ctrl_message(b->num, data->record_type, in, inl);
	357	if (ret >= 0) {
	358	ret = inl;
	359	BIO_clear_ktls_ctrl_msg_flag(b);
	360	}
	361	} else
	362	# endif
	363	ret = writesocket(b->num, in, inl);
0f113f3e MC	364	BIO_clear_retry_flags(b);
	365	if (ret <= 0) {
	366	if (BIO_sock_should_retry(ret))
	367	BIO_set_retry_write(b);
	368	}
26a7d938	369	return ret;
0f113f3e	370	}
d02b48c6	371
0e1c0612	372	static long conn_ctrl(BIO b, int cmd, long num, void ptr)
0f113f3e MC	373	{
	374	BIO *dbio;
	375	int *ip;
4b72d5f8	376	const char **pptr = NULL;
0f113f3e MC	377	long ret = 1;
0f113f3e MC	378	BIO_CONNECT *data;
b1f79e7c JB	379	# ifndef OPENSSL_NO_KTLS
	380	# ifdef __FreeBSD__
	381	struct tls_enable *crypto_info;
	382	# else
	383	struct tls12_crypto_info_aes_gcm_128 *crypto_info;
	384	# endif
	385	# endif
0f113f3e MC	386
	387	data = (BIO_CONNECT *)b->ptr;
	388
	389	switch (cmd) {
	390	case BIO_CTRL_RESET:
	391	ret = 0;
	392	data->state = BIO_CONN_S_BEFORE;
	393	conn_close_socket(b);
417be660 RL	394	BIO_ADDRINFO_free(data->addr_first);
417be660 RL	395	data->addr_first = NULL;
0f113f3e MC	396	b->flags = 0;
	397	break;
	398	case BIO_C_DO_STATE_MACHINE:
	399	/* use this one to start the connection */
	400	if (data->state != BIO_CONN_S_OK)
	401	ret = (long)conn_state(b, data);
	402	else
	403	ret = 1;
	404	break;
	405	case BIO_C_GET_CONNECT:
	406	if (ptr != NULL) {
	407	pptr = (const char **)ptr;
417be660 RL	408	if (num == 0) {
	409	*pptr = data->param_hostname;
	410	} else if (num == 1) {
	411	*pptr = data->param_service;
	412	} else if (num == 2) {
	413	pptr = (const char )BIO_ADDRINFO_address(data->addr_iter);
	414	} else if (num == 3) {
	415	switch (BIO_ADDRINFO_family(data->addr_iter)) {
	416	# ifdef AF_INET6
	417	case AF_INET6:
	418	ret = BIO_FAMILY_IPV6;
	419	break;
	420	# endif
	421	case AF_INET:
	422	ret = BIO_FAMILY_IPV4;
	423	break;
	424	case 0:
	425	ret = data->connect_family;
	426	break;
	427	default:
	428	ret = -1;
	429	break;
4b72d5f8	430	}
417be660 RL	431	} else {
417be660 RL	432	ret = 0;
4b72d5f8 RL	433	}
4b72d5f8 RL	434	} else {
4b72d5f8	435	ret = 0;
0f113f3e MC	436	}
	437	break;
	438	case BIO_C_SET_CONNECT:
	439	if (ptr != NULL) {
	440	b->init = 1;
	441	if (num == 0) {
417be660 RL	442	char *hold_service = data->param_service;
	443	/* We affect the hostname regardless. However, the input
	444	* string might contain a host:service spec, so we must
	445	* parse it, which might or might not affect the service
	446	*/
b548a1f1	447	OPENSSL_free(data->param_hostname);
417be660 RL	448	data->param_hostname = NULL;
	449	ret = BIO_parse_hostserv(ptr,
	450	&data->param_hostname,
	451	&data->param_service,
	452	BIO_PARSE_PRIO_HOST);
	453	if (hold_service != data->param_service)
	454	OPENSSL_free(hold_service);
0f113f3e	455	} else if (num == 1) {
417be660	456	OPENSSL_free(data->param_service);
3d484574	457	data->param_service = OPENSSL_strdup(ptr);
0f113f3e	458	} else if (num == 2) {
417be660 RL	459	const BIO_ADDR addr = (const BIO_ADDR )ptr;
	460	if (ret) {
	461	data->param_hostname = BIO_ADDR_hostname_string(addr, 1);
	462	data->param_service = BIO_ADDR_service_string(addr, 1);
	463	BIO_ADDRINFO_free(data->addr_first);
	464	data->addr_first = NULL;
	465	data->addr_iter = NULL;
	466	}
0f113f3e	467	} else if (num == 3) {
417be660 RL	468	data->connect_family = (int )ptr;
	469	} else {
	470	ret = 0;
0f113f3e MC	471	}
	472	}
	473	break;
	474	case BIO_C_SET_NBIO:
417be660 RL	475	if (num != 0)
	476	data->connect_mode \|= BIO_SOCK_NONBLOCK;
	477	else
	478	data->connect_mode &= ~BIO_SOCK_NONBLOCK;
	479	break;
	480	case BIO_C_SET_CONNECT_MODE:
	481	data->connect_mode = (int)num;
0f113f3e MC	482	break;
	483	case BIO_C_GET_FD:
	484	if (b->init) {
	485	ip = (int *)ptr;
	486	if (ip != NULL)
	487	*ip = b->num;
	488	ret = b->num;
	489	} else
	490	ret = -1;
	491	break;
	492	case BIO_CTRL_GET_CLOSE:
	493	ret = b->shutdown;
	494	break;
	495	case BIO_CTRL_SET_CLOSE:
	496	b->shutdown = (int)num;
	497	break;
	498	case BIO_CTRL_PENDING:
	499	case BIO_CTRL_WPENDING:
	500	ret = 0;
	501	break;
	502	case BIO_CTRL_FLUSH:
	503	break;
	504	case BIO_CTRL_DUP:
	505	{
	506	dbio = (BIO *)ptr;
0f113f3e MC	507	if (data->param_hostname)
0f113f3e MC	508	BIO_set_conn_hostname(dbio, data->param_hostname);
417be660 RL	509	if (data->param_service)
	510	BIO_set_conn_port(dbio, data->param_service);
	511	BIO_set_conn_ip_family(dbio, data->connect_family);
	512	BIO_set_conn_mode(dbio, data->connect_mode);
0f113f3e MC	513	/*
	514	* FIXME: the cast of the function seems unlikely to be a good
	515	* idea
	516	*/
fce78bd4	517	(void)BIO_set_info_callback(dbio, data->info_callback);
0f113f3e MC	518	}
	519	break;
	520	case BIO_CTRL_SET_CALLBACK:
2722ff50	521	ret = 0; /* use callback ctrl */
0f113f3e MC	522	break;
	523	case BIO_CTRL_GET_CALLBACK:
	524	{
fce78bd4	525	BIO_info_cb **fptr;
0f113f3e	526
fce78bd4	527	fptr = (BIO_info_cb **)ptr;
0f113f3e MC	528	*fptr = data->info_callback;
	529	}
	530	break;
6d53ad6b MC	531	case BIO_CTRL_EOF:
	532	ret = (b->flags & BIO_FLAGS_IN_EOF) != 0 ? 1 : 0;
	533	break;
b1f79e7c JB	534	# ifndef OPENSSL_NO_KTLS
	535	case BIO_CTRL_SET_KTLS:
	536	# ifdef __FreeBSD__
	537	crypto_info = (struct tls_enable *)ptr;
	538	# else
	539	crypto_info = (struct tls12_crypto_info_aes_gcm_128 *)ptr;
	540	# endif
	541	ret = ktls_start(b->num, crypto_info, sizeof(*crypto_info), num);
	542	if (ret)
	543	BIO_set_ktls_flag(b, num);
	544	break;
	545	case BIO_CTRL_GET_KTLS_SEND:
	546	return BIO_should_ktls_flag(b, 1);
	547	case BIO_CTRL_GET_KTLS_RECV:
	548	return BIO_should_ktls_flag(b, 0);
	549	case BIO_CTRL_SET_KTLS_TX_SEND_CTRL_MSG:
	550	BIO_set_ktls_ctrl_msg_flag(b);
	551	data->record_type = num;
	552	ret = 0;
	553	break;
	554	case BIO_CTRL_CLEAR_KTLS_TX_CTRL_MSG:
	555	BIO_clear_ktls_ctrl_msg_flag(b);
	556	ret = 0;
	557	break;
	558	# endif
0f113f3e MC	559	default:
	560	ret = 0;
	561	break;
	562	}
26a7d938	563	return ret;
0f113f3e	564	}
d02b48c6	565
fce78bd4	566	static long conn_callback_ctrl(BIO b, int cmd, BIO_info_cb fp)
0f113f3e MC	567	{
	568	long ret = 1;
	569	BIO_CONNECT *data;
	570
	571	data = (BIO_CONNECT *)b->ptr;
	572
	573	switch (cmd) {
	574	case BIO_CTRL_SET_CALLBACK:
	575	{
fce78bd4	576	data->info_callback = fp;
0f113f3e MC	577	}
	578	break;
	579	default:
	580	ret = 0;
	581	break;
	582	}
26a7d938	583	return ret;
0f113f3e	584	}
d3442bc7	585
0e1c0612	586	static int conn_puts(BIO bp, const char str)
0f113f3e MC	587	{
0f113f3e MC	588	int n, ret;
d02b48c6	589
0f113f3e MC	590	n = strlen(str);
0f113f3e MC	591	ret = conn_write(bp, str, n);
26a7d938	592	return ret;
0f113f3e	593	}
d02b48c6	594
c45a48c1	595	BIO BIO_new_connect(const char str)
0f113f3e MC	596	{
	597	BIO *ret;
	598
	599	ret = BIO_new(BIO_s_connect());
	600	if (ret == NULL)
26a7d938	601	return NULL;
0f113f3e	602	if (BIO_set_conn_hostname(ret, str))
26a7d938	603	return ret;
ca3a82c3	604	BIO_free(ret);
26a7d938	605	return NULL;
0f113f3e	606	}
d02b48c6 RE	607
d02b48c6 RE	608	#endif