/src/openssl30/crypto/bio/bss_conn.c

Source (jump to first uncovered line)
/*
 * Copyright 1995-2022 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 <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",
    bwrite_conv,
    conn_write,
    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) {
                ERR_raise_data(ERR_LIB_BIO,
                               BIO_R_NO_HOSTNAME_OR_SERVICE_SPECIFIED,
                               "hostname=%s service=%s",
                               c->param_hostname, 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
                        ERR_raise(ERR_LIB_BIO, 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:
                    ERR_raise(ERR_LIB_BIO, 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) {
                ERR_raise(ERR_LIB_BIO, 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);
                ERR_raise(ERR_LIB_BIO, 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);
            ERR_set_mark();
            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_pop_to_mark();
                } 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_pop_to_mark();
                    break;
                } else {
                    ERR_clear_last_mark();
                    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 {
                ERR_clear_last_mark();
                c->state = BIO_CONN_S_OK;
            }
            break;

        case BIO_CONN_S_BLOCKED_CONNECT:
            /* wait for socket being writable, before querying BIO_sock_error */
            if (BIO_socket_wait(b->num, 0, time(NULL)) == 0)
                break;
            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;
                    break;
                }
                ERR_raise_data(ERR_LIB_SYS, i,
                               "calling connect(%s, %s)",
                                c->param_hostname, c->param_service);
                ERR_raise(ERR_LIB_BIO, BIO_R_NBIO_CONNECT_ERROR);
                ret = 0;
                goto exit_loop;
            } else {
                c->state = BIO_CONN_S_OK;
# 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(b->num);
# endif
            }
            break;

        case BIO_CONN_S_CONNECT_ERROR:
            ERR_raise(ERR_LIB_BIO, 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) {
        ERR_raise(ERR_LIB_BIO, 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
    ktls_crypto_info_t *crypto_info;
# 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) { /* BIO_set_conn_hostname */
                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) { /* BIO_set_conn_port */
                OPENSSL_free(data->param_service);
                if ((data->param_service = OPENSSL_strdup(ptr)) == NULL)
                    ret = 0;
            } else if (num == 2) { /* BIO_set_conn_address */
                const BIO_ADDR *addr = (const BIO_ADDR *)ptr;
                char *host = BIO_ADDR_hostname_string(addr, 1);
                char *service = BIO_ADDR_service_string(addr, 1);

                ret = host != NULL && service != NULL;
                if (ret) {
                    OPENSSL_free(data->param_hostname);
                    data->param_hostname = host;
                    OPENSSL_free(data->param_service);
                    data->param_service = service;
                    BIO_ADDRINFO_free(data->addr_first);
                    data->addr_first = NULL;
                    data->addr_iter = NULL;
                } else {
                    OPENSSL_free(host);
                    OPENSSL_free(service);
                }
            } else if (num == 3) { /* BIO_set_conn_ip_family */
                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;
        break;
# ifndef OPENSSL_NO_KTLS
    case BIO_CTRL_SET_KTLS:
        crypto_info = (ktls_crypto_info_t *)ptr;
        ret = ktls_start(b->num, 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) != 0;
    case BIO_CTRL_GET_KTLS_RECV:
        return BIO_should_ktls_flag(b, 0) != 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

Coverage Report

Created: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 1995-2022 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 <errno.h>
12
13		#include "bio_local.h"
14		#include "internal/ktls.h"
15
16		#ifndef OPENSSL_NO_SOCK
17
18		typedef struct bio_connect_st {
19		int state;
20		int connect_family;
21		char *param_hostname;
22		char *param_service;
23		int connect_mode;
24		# ifndef OPENSSL_NO_KTLS
25		unsigned char record_type;
26		# endif
27
28		BIO_ADDRINFO *addr_first;
29		const BIO_ADDRINFO *addr_iter;
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		*/
39		BIO_info_cb *info_callback;
40		} BIO_CONNECT;
41
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);
46		static int conn_new(BIO *h);
47		static int conn_free(BIO *data);
48		static long conn_callback_ctrl(BIO h, int cmd, BIO_info_cb );
49
50		static int conn_state(BIO b, BIO_CONNECT c);
51		static void conn_close_socket(BIO *data);
52		BIO_CONNECT *BIO_CONNECT_new(void);
53		void BIO_CONNECT_free(BIO_CONNECT *a);
54
55	0	#define BIO_CONN_S_BEFORE 1
56	0	#define BIO_CONN_S_GET_ADDR 2
57	0	#define BIO_CONN_S_CREATE_SOCKET 3
58	0	#define BIO_CONN_S_CONNECT 4
59	0	#define BIO_CONN_S_OK 5
60	0	#define BIO_CONN_S_BLOCKED_CONNECT 6
61	0	#define BIO_CONN_S_CONNECT_ERROR 7
62
63		static const BIO_METHOD methods_connectp = {
64		BIO_TYPE_CONNECT,
65		"socket connect",
66		bwrite_conv,
67		conn_write,
68		bread_conv,
69		conn_read,
70		conn_puts,
71		NULL, /* conn_gets, */
72		conn_ctrl,
73		conn_new,
74		conn_free,
75		conn_callback_ctrl,
76		};
77
78		static int conn_state(BIO b, BIO_CONNECT c)
79	0	{
80	0	int ret = -1, i;
81	0	BIO_info_cb *cb = NULL;
82
83	0	if (c->info_callback != NULL)
84	0	cb = c->info_callback;
85
86	0	for (;;) {
87	0	switch (c->state) {
88	0	case BIO_CONN_S_BEFORE:
89	0	if (c->param_hostname == NULL && c->param_service == NULL) {
90	0	ERR_raise_data(ERR_LIB_BIO,
91	0	BIO_R_NO_HOSTNAME_OR_SERVICE_SPECIFIED,
92	0	"hostname=%s service=%s",
93	0	c->param_hostname, c->param_service);
94	0	goto exit_loop;
95	0	}
96	0	c->state = BIO_CONN_S_GET_ADDR;
97	0	break;
98
99	0	case BIO_CONN_S_GET_ADDR:
100	0	{
101	0	int family = AF_UNSPEC;
102	0	switch (c->connect_family) {
103	0	case BIO_FAMILY_IPV6:
104	0	if (1) { /* This is a trick we use to avoid bit rot.
105		* at least the "else" part will always be
106		* compiled.
107		*/
108	0	#ifdef AF_INET6
109	0	family = AF_INET6;
110	0	} else {
111	0	#endif
112	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNAVAILABLE_IP_FAMILY);
113	0	goto exit_loop;
114	0	}
115	0	break;
116	0	case BIO_FAMILY_IPV4:
117	0	family = AF_INET;
118	0	break;
119	0	case BIO_FAMILY_IPANY:
120	0	family = AF_UNSPEC;
121	0	break;
122	0	default:
123	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_IP_FAMILY);
124	0	goto exit_loop;
125	0	}
126	0	if (BIO_lookup(c->param_hostname, c->param_service,
127	0	BIO_LOOKUP_CLIENT,
128	0	family, SOCK_STREAM, &c->addr_first) == 0)
129	0	goto exit_loop;
130	0	}
131	0	if (c->addr_first == NULL) {
132	0	ERR_raise(ERR_LIB_BIO, BIO_R_LOOKUP_RETURNED_NOTHING);
133	0	goto exit_loop;
134	0	}
135	0	c->addr_iter = c->addr_first;
136	0	c->state = BIO_CONN_S_CREATE_SOCKET;
137	0	break;
138
139	0	case BIO_CONN_S_CREATE_SOCKET:
140	0	ret = BIO_socket(BIO_ADDRINFO_family(c->addr_iter),
141	0	BIO_ADDRINFO_socktype(c->addr_iter),
142	0	BIO_ADDRINFO_protocol(c->addr_iter), 0);
143	0	if (ret == (int)INVALID_SOCKET) {
144	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
145	0	"calling socket(%s, %s)",
146	0	c->param_hostname, c->param_service);
147	0	ERR_raise(ERR_LIB_BIO, BIO_R_UNABLE_TO_CREATE_SOCKET);
148	0	goto exit_loop;
149	0	}
150	0	b->num = ret;
151	0	c->state = BIO_CONN_S_CONNECT;
152	0	break;
153
154	0	case BIO_CONN_S_CONNECT:
155	0	BIO_clear_retry_flags(b);
156	0	ERR_set_mark();
157	0	ret = BIO_connect(b->num, BIO_ADDRINFO_address(c->addr_iter),
158	0	BIO_SOCK_KEEPALIVE \| c->connect_mode);
159	0	b->retry_reason = 0;
160	0	if (ret == 0) {
161	0	if (BIO_sock_should_retry(ret)) {
162	0	BIO_set_retry_special(b);
163	0	c->state = BIO_CONN_S_BLOCKED_CONNECT;
164	0	b->retry_reason = BIO_RR_CONNECT;
165	0	ERR_pop_to_mark();
166	0	} else if ((c->addr_iter = BIO_ADDRINFO_next(c->addr_iter))
167	0	!= NULL) {
168		/*
169		* if there are more addresses to try, do that first
170		*/
171	0	BIO_closesocket(b->num);
172	0	c->state = BIO_CONN_S_CREATE_SOCKET;
173	0	ERR_pop_to_mark();
174	0	break;
175	0	} else {
176	0	ERR_clear_last_mark();
177	0	ERR_raise_data(ERR_LIB_SYS, get_last_socket_error(),
178	0	"calling connect(%s, %s)",
179	0	c->param_hostname, c->param_service);
180	0	c->state = BIO_CONN_S_CONNECT_ERROR;
181	0	break;
182	0	}
183	0	goto exit_loop;
184	0	} else {
185	0	ERR_clear_last_mark();
186	0	c->state = BIO_CONN_S_OK;
187	0	}
188	0	break;
189
190	0	case BIO_CONN_S_BLOCKED_CONNECT:
191		/* wait for socket being writable, before querying BIO_sock_error */
192	0	if (BIO_socket_wait(b->num, 0, time(NULL)) == 0)
193	0	break;
194	0	i = BIO_sock_error(b->num);
195	0	if (i != 0) {
196	0	BIO_clear_retry_flags(b);
197	0	if ((c->addr_iter = BIO_ADDRINFO_next(c->addr_iter)) != NULL) {
198		/*
199		* if there are more addresses to try, do that first
200		*/
201	0	BIO_closesocket(b->num);
202	0	c->state = BIO_CONN_S_CREATE_SOCKET;
203	0	break;
204	0	}
205	0	ERR_raise_data(ERR_LIB_SYS, i,
206	0	"calling connect(%s, %s)",
207	0	c->param_hostname, c->param_service);
208	0	ERR_raise(ERR_LIB_BIO, BIO_R_NBIO_CONNECT_ERROR);
209	0	ret = 0;
210	0	goto exit_loop;
211	0	} else {
212	0	c->state = BIO_CONN_S_OK;
213		# ifndef OPENSSL_NO_KTLS
214		/*
215		* The new socket is created successfully regardless of ktls_enable.
216		* ktls_enable doesn't change any functionality of the socket, except
217		* changing the setsockopt to enable the processing of ktls_start.
218		* Thus, it is not a problem to call it for non-TLS sockets.
219		*/
220		ktls_enable(b->num);
221		# endif
222	0	}
223	0	break;
224
225	0	case BIO_CONN_S_CONNECT_ERROR:
226	0	ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR);
227	0	ret = 0;
228	0	goto exit_loop;
229
230	0	case BIO_CONN_S_OK:
231	0	ret = 1;
232	0	goto exit_loop;
233	0	default:
234		/* abort(); */
235	0	goto exit_loop;
236	0	}
237
238	0	if (cb != NULL) {
239	0	if ((ret = cb((BIO *)b, c->state, ret)) == 0)
240	0	goto end;
241	0	}
242	0	}
243
244		/* Loop does not exit */
245	0	exit_loop:
246	0	if (cb != NULL)
247	0	ret = cb((BIO *)b, c->state, ret);
248	0	end:
249	0	return ret;
250	0	}
251
252		BIO_CONNECT *BIO_CONNECT_new(void)
253	0	{
254	0	BIO_CONNECT *ret;
255
256	0	if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
257	0	ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
258	0	return NULL;
259	0	}
260	0	ret->state = BIO_CONN_S_BEFORE;
261	0	ret->connect_family = BIO_FAMILY_IPANY;
262	0	return ret;
263	0	}
264
265		void BIO_CONNECT_free(BIO_CONNECT *a)
266	0	{
267	0	if (a == NULL)
268	0	return;
269	0	OPENSSL_free(a->param_hostname);
270	0	OPENSSL_free(a->param_service);
271	0	BIO_ADDRINFO_free(a->addr_first);
272	0	OPENSSL_free(a);
273	0	}
274
275		const BIO_METHOD *BIO_s_connect(void)
276	0	{
277	0	return &methods_connectp;
278	0	}
279
280		static int conn_new(BIO *bi)
281	0	{
282	0	bi->init = 0;
283	0	bi->num = (int)INVALID_SOCKET;
284	0	bi->flags = 0;
285	0	if ((bi->ptr = (char *)BIO_CONNECT_new()) == NULL)
286	0	return 0;
287	0	else
288	0	return 1;
289	0	}
290
291		static void conn_close_socket(BIO *bio)
292	0	{
293	0	BIO_CONNECT *c;
294
295	0	c = (BIO_CONNECT *)bio->ptr;
296	0	if (bio->num != (int)INVALID_SOCKET) {
297		/* Only do a shutdown if things were established */
298	0	if (c->state == BIO_CONN_S_OK)
299	0	shutdown(bio->num, 2);
300	0	BIO_closesocket(bio->num);
301	0	bio->num = (int)INVALID_SOCKET;
302	0	}
303	0	}
304
305		static int conn_free(BIO *a)
306	0	{
307	0	BIO_CONNECT *data;
308
309	0	if (a == NULL)
310	0	return 0;
311	0	data = (BIO_CONNECT *)a->ptr;
312
313	0	if (a->shutdown) {
314	0	conn_close_socket(a);
315	0	BIO_CONNECT_free(data);
316	0	a->ptr = NULL;
317	0	a->flags = 0;
318	0	a->init = 0;
319	0	}
320	0	return 1;
321	0	}
322
323		static int conn_read(BIO b, char out, int outl)
324	0	{
325	0	int ret = 0;
326	0	BIO_CONNECT *data;
327
328	0	data = (BIO_CONNECT *)b->ptr;
329	0	if (data->state != BIO_CONN_S_OK) {
330	0	ret = conn_state(b, data);
331	0	if (ret <= 0)
332	0	return ret;
333	0	}
334
335	0	if (out != NULL) {
336	0	clear_socket_error();
337		# ifndef OPENSSL_NO_KTLS
338		if (BIO_get_ktls_recv(b))
339		ret = ktls_read_record(b->num, out, outl);
340		else
341		# endif
342	0	ret = readsocket(b->num, out, outl);
343	0	BIO_clear_retry_flags(b);
344	0	if (ret <= 0) {
345	0	if (BIO_sock_should_retry(ret))
346	0	BIO_set_retry_read(b);
347	0	else if (ret == 0)
348	0	b->flags \|= BIO_FLAGS_IN_EOF;
349	0	}
350	0	}
351	0	return ret;
352	0	}
353
354		static int conn_write(BIO b, const char in, int inl)
355	0	{
356	0	int ret;
357	0	BIO_CONNECT *data;
358
359	0	data = (BIO_CONNECT *)b->ptr;
360	0	if (data->state != BIO_CONN_S_OK) {
361	0	ret = conn_state(b, data);
362	0	if (ret <= 0)
363	0	return ret;
364	0	}
365
366	0	clear_socket_error();
367		# ifndef OPENSSL_NO_KTLS
368		if (BIO_should_ktls_ctrl_msg_flag(b)) {
369		ret = ktls_send_ctrl_message(b->num, data->record_type, in, inl);
370		if (ret >= 0) {
371		ret = inl;
372		BIO_clear_ktls_ctrl_msg_flag(b);
373		}
374		} else
375		# endif
376	0	ret = writesocket(b->num, in, inl);
377	0	BIO_clear_retry_flags(b);
378	0	if (ret <= 0) {
379	0	if (BIO_sock_should_retry(ret))
380	0	BIO_set_retry_write(b);
381	0	}
382	0	return ret;
383	0	}
384
385		static long conn_ctrl(BIO b, int cmd, long num, void ptr)
386	0	{
387	0	BIO *dbio;
388	0	int *ip;
389	0	const char **pptr = NULL;
390	0	long ret = 1;
391	0	BIO_CONNECT *data;
392		# ifndef OPENSSL_NO_KTLS
393		ktls_crypto_info_t *crypto_info;
394		# endif
395
396	0	data = (BIO_CONNECT *)b->ptr;
397
398	0	switch (cmd) {
399	0	case BIO_CTRL_RESET:
400	0	ret = 0;
401	0	data->state = BIO_CONN_S_BEFORE;
402	0	conn_close_socket(b);
403	0	BIO_ADDRINFO_free(data->addr_first);
404	0	data->addr_first = NULL;
405	0	b->flags = 0;
406	0	break;
407	0	case BIO_C_DO_STATE_MACHINE:
408		/* use this one to start the connection */
409	0	if (data->state != BIO_CONN_S_OK)
410	0	ret = (long)conn_state(b, data);
411	0	else
412	0	ret = 1;
413	0	break;
414	0	case BIO_C_GET_CONNECT:
415	0	if (ptr != NULL) {
416	0	pptr = (const char **)ptr;
417	0	if (num == 0) {
418	0	*pptr = data->param_hostname;
419	0	} else if (num == 1) {
420	0	*pptr = data->param_service;
421	0	} else if (num == 2) {
422	0	pptr = (const char )BIO_ADDRINFO_address(data->addr_iter);
423	0	} else if (num == 3) {
424	0	switch (BIO_ADDRINFO_family(data->addr_iter)) {
425	0	# ifdef AF_INET6
426	0	case AF_INET6:
427	0	ret = BIO_FAMILY_IPV6;
428	0	break;
429	0	# endif
430	0	case AF_INET:
431	0	ret = BIO_FAMILY_IPV4;
432	0	break;
433	0	case 0:
434	0	ret = data->connect_family;
435	0	break;
436	0	default:
437	0	ret = -1;
438	0	break;
439	0	}
440	0	} else {
441	0	ret = 0;
442	0	}
443	0	} else {
444	0	ret = 0;
445	0	}
446	0	break;
447	0	case BIO_C_SET_CONNECT:
448	0	if (ptr != NULL) {
449	0	b->init = 1;
450	0	if (num == 0) { /* BIO_set_conn_hostname */
451	0	char *hold_service = data->param_service;
452		/* We affect the hostname regardless. However, the input
453		* string might contain a host:service spec, so we must
454		* parse it, which might or might not affect the service
455		*/
456
457	0	OPENSSL_free(data->param_hostname);
458	0	data->param_hostname = NULL;
459	0	ret = BIO_parse_hostserv(ptr,
460	0	&data->param_hostname,
461	0	&data->param_service,
462	0	BIO_PARSE_PRIO_HOST);
463	0	if (hold_service != data->param_service)
464	0	OPENSSL_free(hold_service);
465	0	} else if (num == 1) { /* BIO_set_conn_port */
466	0	OPENSSL_free(data->param_service);
467	0	if ((data->param_service = OPENSSL_strdup(ptr)) == NULL)
468	0	ret = 0;
469	0	} else if (num == 2) { /* BIO_set_conn_address */
470	0	const BIO_ADDR addr = (const BIO_ADDR )ptr;
471	0	char *host = BIO_ADDR_hostname_string(addr, 1);
472	0	char *service = BIO_ADDR_service_string(addr, 1);
473
474	0	ret = host != NULL && service != NULL;
475	0	if (ret) {
476	0	OPENSSL_free(data->param_hostname);
477	0	data->param_hostname = host;
478	0	OPENSSL_free(data->param_service);
479	0	data->param_service = service;
480	0	BIO_ADDRINFO_free(data->addr_first);
481	0	data->addr_first = NULL;
482	0	data->addr_iter = NULL;
483	0	} else {
484	0	OPENSSL_free(host);
485	0	OPENSSL_free(service);
486	0	}
487	0	} else if (num == 3) { /* BIO_set_conn_ip_family */
488	0	data->connect_family = (int )ptr;
489	0	} else {
490	0	ret = 0;
491	0	}
492	0	}
493	0	break;
494	0	case BIO_C_SET_NBIO:
495	0	if (num != 0)
496	0	data->connect_mode \|= BIO_SOCK_NONBLOCK;
497	0	else
498	0	data->connect_mode &= ~BIO_SOCK_NONBLOCK;
499	0	break;
500	0	case BIO_C_SET_CONNECT_MODE:
501	0	data->connect_mode = (int)num;
502	0	break;
503	0	case BIO_C_GET_FD:
504	0	if (b->init) {
505	0	ip = (int *)ptr;
506	0	if (ip != NULL)
507	0	*ip = b->num;
508	0	ret = b->num;
509	0	} else
510	0	ret = -1;
511	0	break;
512	0	case BIO_CTRL_GET_CLOSE:
513	0	ret = b->shutdown;
514	0	break;
515	0	case BIO_CTRL_SET_CLOSE:
516	0	b->shutdown = (int)num;
517	0	break;
518	0	case BIO_CTRL_PENDING:
519	0	case BIO_CTRL_WPENDING:
520	0	ret = 0;
521	0	break;
522	0	case BIO_CTRL_FLUSH:
523	0	break;
524	0	case BIO_CTRL_DUP:
525	0	{
526	0	dbio = (BIO *)ptr;
527	0	if (data->param_hostname)
528	0	BIO_set_conn_hostname(dbio, data->param_hostname);
529	0	if (data->param_service)
530	0	BIO_set_conn_port(dbio, data->param_service);
531	0	BIO_set_conn_ip_family(dbio, data->connect_family);
532	0	BIO_set_conn_mode(dbio, data->connect_mode);
533		/*
534		* FIXME: the cast of the function seems unlikely to be a good
535		* idea
536		*/
537	0	(void)BIO_set_info_callback(dbio, data->info_callback);
538	0	}
539	0	break;
540	0	case BIO_CTRL_SET_CALLBACK:
541	0	ret = 0; /* use callback ctrl */
542	0	break;
543	0	case BIO_CTRL_GET_CALLBACK:
544	0	{
545	0	BIO_info_cb **fptr;
546
547	0	fptr = (BIO_info_cb **)ptr;
548	0	*fptr = data->info_callback;
549	0	}
550	0	break;
551	0	case BIO_CTRL_EOF:
552	0	ret = (b->flags & BIO_FLAGS_IN_EOF) != 0;
553	0	break;
554		# ifndef OPENSSL_NO_KTLS
555		case BIO_CTRL_SET_KTLS:
556		crypto_info = (ktls_crypto_info_t *)ptr;
557		ret = ktls_start(b->num, crypto_info, num);
558		if (ret)
559		BIO_set_ktls_flag(b, num);
560		break;
561		case BIO_CTRL_GET_KTLS_SEND:
562		return BIO_should_ktls_flag(b, 1) != 0;
563		case BIO_CTRL_GET_KTLS_RECV:
564		return BIO_should_ktls_flag(b, 0) != 0;
565		case BIO_CTRL_SET_KTLS_TX_SEND_CTRL_MSG:
566		BIO_set_ktls_ctrl_msg_flag(b);
567		data->record_type = num;
568		ret = 0;
569		break;
570		case BIO_CTRL_CLEAR_KTLS_TX_CTRL_MSG:
571		BIO_clear_ktls_ctrl_msg_flag(b);
572		ret = 0;
573		break;
574		# endif
575	0	default:
576	0	ret = 0;
577	0	break;
578	0	}
579	0	return ret;
580	0	}
581
582		static long conn_callback_ctrl(BIO b, int cmd, BIO_info_cb fp)
583	0	{
584	0	long ret = 1;
585	0	BIO_CONNECT *data;
586
587	0	data = (BIO_CONNECT *)b->ptr;
588
589	0	switch (cmd) {
590	0	case BIO_CTRL_SET_CALLBACK:
591	0	{
592	0	data->info_callback = fp;
593	0	}
594	0	break;
595	0	default:
596	0	ret = 0;
597	0	break;
598	0	}
599	0	return ret;
600	0	}
601
602		static int conn_puts(BIO bp, const char str)
603	0	{
604	0	int n, ret;
605
606	0	n = strlen(str);
607	0	ret = conn_write(bp, str, n);
608	0	return ret;
609	0	}
610
611		BIO BIO_new_connect(const char str)
612	0	{
613	0	BIO *ret;
614
615	0	ret = BIO_new(BIO_s_connect());
616	0	if (ret == NULL)
617	0	return NULL;
618	0	if (BIO_set_conn_hostname(ret, str))
619	0	return ret;
620	0	BIO_free(ret);
621	0	return NULL;
622	0	}
623
624		#endif