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

Source
/*
 * 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;
            }
            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: 2025-11-16 06:40

Line	Count	Source
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	0	}
214	0	break;
215
216	0	case BIO_CONN_S_CONNECT_ERROR:
217	0	ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR);
218	0	ret = 0;
219	0	goto exit_loop;
220
221	0	case BIO_CONN_S_OK:
222	0	ret = 1;
223	0	goto exit_loop;
224	0	default:
225		/* abort(); */
226	0	goto exit_loop;
227	0	}
228
229	0	if (cb != NULL) {
230	0	if ((ret = cb((BIO *)b, c->state, ret)) == 0)
231	0	goto end;
232	0	}
233	0	}
234
235		/* Loop does not exit */
236	0	exit_loop:
237	0	if (cb != NULL)
238	0	ret = cb((BIO *)b, c->state, ret);
239	0	end:
240	0	return ret;
241	0	}
242
243		BIO_CONNECT *BIO_CONNECT_new(void)
244	0	{
245	0	BIO_CONNECT *ret;
246
247	0	if ((ret = OPENSSL_zalloc(sizeof(*ret))) == NULL) {
248	0	ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
249	0	return NULL;
250	0	}
251	0	ret->state = BIO_CONN_S_BEFORE;
252	0	ret->connect_family = BIO_FAMILY_IPANY;
253	0	return ret;
254	0	}
255
256		void BIO_CONNECT_free(BIO_CONNECT *a)
257	0	{
258	0	if (a == NULL)
259	0	return;
260	0	OPENSSL_free(a->param_hostname);
261	0	OPENSSL_free(a->param_service);
262	0	BIO_ADDRINFO_free(a->addr_first);
263	0	OPENSSL_free(a);
264	0	}
265
266		const BIO_METHOD *BIO_s_connect(void)
267	0	{
268	0	return &methods_connectp;
269	0	}
270
271		static int conn_new(BIO *bi)
272	0	{
273	0	bi->init = 0;
274	0	bi->num = (int)INVALID_SOCKET;
275	0	bi->flags = 0;
276	0	if ((bi->ptr = (char *)BIO_CONNECT_new()) == NULL)
277	0	return 0;
278	0	else
279	0	return 1;
280	0	}
281
282		static void conn_close_socket(BIO *bio)
283	0	{
284	0	BIO_CONNECT *c;
285
286	0	c = (BIO_CONNECT *)bio->ptr;
287	0	if (bio->num != (int)INVALID_SOCKET) {
288		/* Only do a shutdown if things were established */
289	0	if (c->state == BIO_CONN_S_OK)
290	0	shutdown(bio->num, 2);
291	0	BIO_closesocket(bio->num);
292	0	bio->num = (int)INVALID_SOCKET;
293	0	}
294	0	}
295
296		static int conn_free(BIO *a)
297	0	{
298	0	BIO_CONNECT *data;
299
300	0	if (a == NULL)
301	0	return 0;
302	0	data = (BIO_CONNECT *)a->ptr;
303
304	0	if (a->shutdown) {
305	0	conn_close_socket(a);
306	0	BIO_CONNECT_free(data);
307	0	a->ptr = NULL;
308	0	a->flags = 0;
309	0	a->init = 0;
310	0	}
311	0	return 1;
312	0	}
313
314		static int conn_read(BIO b, char out, int outl)
315	0	{
316	0	int ret = 0;
317	0	BIO_CONNECT *data;
318
319	0	data = (BIO_CONNECT *)b->ptr;
320	0	if (data->state != BIO_CONN_S_OK) {
321	0	ret = conn_state(b, data);
322	0	if (ret <= 0)
323	0	return ret;
324	0	}
325
326	0	if (out != NULL) {
327	0	clear_socket_error();
328		# ifndef OPENSSL_NO_KTLS
329		if (BIO_get_ktls_recv(b))
330		ret = ktls_read_record(b->num, out, outl);
331		else
332		# endif
333	0	ret = readsocket(b->num, out, outl);
334	0	BIO_clear_retry_flags(b);
335	0	if (ret <= 0) {
336	0	if (BIO_sock_should_retry(ret))
337	0	BIO_set_retry_read(b);
338	0	else if (ret == 0)
339	0	b->flags \|= BIO_FLAGS_IN_EOF;
340	0	}
341	0	}
342	0	return ret;
343	0	}
344
345		static int conn_write(BIO b, const char in, int inl)
346	0	{
347	0	int ret;
348	0	BIO_CONNECT *data;
349
350	0	data = (BIO_CONNECT *)b->ptr;
351	0	if (data->state != BIO_CONN_S_OK) {
352	0	ret = conn_state(b, data);
353	0	if (ret <= 0)
354	0	return ret;
355	0	}
356
357	0	clear_socket_error();
358		# ifndef OPENSSL_NO_KTLS
359		if (BIO_should_ktls_ctrl_msg_flag(b)) {
360		ret = ktls_send_ctrl_message(b->num, data->record_type, in, inl);
361		if (ret >= 0) {
362		ret = inl;
363		BIO_clear_ktls_ctrl_msg_flag(b);
364		}
365		} else
366		# endif
367	0	ret = writesocket(b->num, in, inl);
368	0	BIO_clear_retry_flags(b);
369	0	if (ret <= 0) {
370	0	if (BIO_sock_should_retry(ret))
371	0	BIO_set_retry_write(b);
372	0	}
373	0	return ret;
374	0	}
375
376		static long conn_ctrl(BIO b, int cmd, long num, void ptr)
377	0	{
378	0	BIO *dbio;
379	0	int *ip;
380	0	const char **pptr = NULL;
381	0	long ret = 1;
382	0	BIO_CONNECT *data;
383		# ifndef OPENSSL_NO_KTLS
384		ktls_crypto_info_t *crypto_info;
385		# endif
386
387	0	data = (BIO_CONNECT *)b->ptr;
388
389	0	switch (cmd) {
390	0	case BIO_CTRL_RESET:
391	0	ret = 0;
392	0	data->state = BIO_CONN_S_BEFORE;
393	0	conn_close_socket(b);
394	0	BIO_ADDRINFO_free(data->addr_first);
395	0	data->addr_first = NULL;
396	0	b->flags = 0;
397	0	break;
398	0	case BIO_C_DO_STATE_MACHINE:
399		/* use this one to start the connection */
400	0	if (data->state != BIO_CONN_S_OK)
401	0	ret = (long)conn_state(b, data);
402	0	else
403	0	ret = 1;
404	0	break;
405	0	case BIO_C_GET_CONNECT:
406	0	if (ptr != NULL) {
407	0	pptr = (const char **)ptr;
408	0	if (num == 0) {
409	0	*pptr = data->param_hostname;
410	0	} else if (num == 1) {
411	0	*pptr = data->param_service;
412	0	} else if (num == 2) {
413	0	pptr = (const char )BIO_ADDRINFO_address(data->addr_iter);
414	0	} else if (num == 3) {
415	0	switch (BIO_ADDRINFO_family(data->addr_iter)) {
416	0	# ifdef AF_INET6
417	0	case AF_INET6:
418	0	ret = BIO_FAMILY_IPV6;
419	0	break;
420	0	# endif
421	0	case AF_INET:
422	0	ret = BIO_FAMILY_IPV4;
423	0	break;
424	0	case 0:
425	0	ret = data->connect_family;
426	0	break;
427	0	default:
428	0	ret = -1;
429	0	break;
430	0	}
431	0	} else {
432	0	ret = 0;
433	0	}
434	0	} else {
435	0	ret = 0;
436	0	}
437	0	break;
438	0	case BIO_C_SET_CONNECT:
439	0	if (ptr != NULL) {
440	0	b->init = 1;
441	0	if (num == 0) { /* BIO_set_conn_hostname */
442	0	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		*/
447
448	0	OPENSSL_free(data->param_hostname);
449	0	data->param_hostname = NULL;
450	0	ret = BIO_parse_hostserv(ptr,
451	0	&data->param_hostname,
452	0	&data->param_service,
453	0	BIO_PARSE_PRIO_HOST);
454	0	if (hold_service != data->param_service)
455	0	OPENSSL_free(hold_service);
456	0	} else if (num == 1) { /* BIO_set_conn_port */
457	0	OPENSSL_free(data->param_service);
458	0	if ((data->param_service = OPENSSL_strdup(ptr)) == NULL)
459	0	ret = 0;
460	0	} else if (num == 2) { /* BIO_set_conn_address */
461	0	const BIO_ADDR addr = (const BIO_ADDR )ptr;
462	0	char *host = BIO_ADDR_hostname_string(addr, 1);
463	0	char *service = BIO_ADDR_service_string(addr, 1);
464
465	0	ret = host != NULL && service != NULL;
466	0	if (ret) {
467	0	OPENSSL_free(data->param_hostname);
468	0	data->param_hostname = host;
469	0	OPENSSL_free(data->param_service);
470	0	data->param_service = service;
471	0	BIO_ADDRINFO_free(data->addr_first);
472	0	data->addr_first = NULL;
473	0	data->addr_iter = NULL;
474	0	} else {
475	0	OPENSSL_free(host);
476	0	OPENSSL_free(service);
477	0	}
478	0	} else if (num == 3) { /* BIO_set_conn_ip_family */
479	0	data->connect_family = (int )ptr;
480	0	} else {
481	0	ret = 0;
482	0	}
483	0	}
484	0	break;
485	0	case BIO_C_SET_NBIO:
486	0	if (num != 0)
487	0	data->connect_mode \|= BIO_SOCK_NONBLOCK;
488	0	else
489	0	data->connect_mode &= ~BIO_SOCK_NONBLOCK;
490	0	break;
491	0	case BIO_C_SET_CONNECT_MODE:
492	0	data->connect_mode = (int)num;
493	0	break;
494	0	case BIO_C_GET_FD:
495	0	if (b->init) {
496	0	ip = (int *)ptr;
497	0	if (ip != NULL)
498	0	*ip = b->num;
499	0	ret = b->num;
500	0	} else
501	0	ret = -1;
502	0	break;
503	0	case BIO_CTRL_GET_CLOSE:
504	0	ret = b->shutdown;
505	0	break;
506	0	case BIO_CTRL_SET_CLOSE:
507	0	b->shutdown = (int)num;
508	0	break;
509	0	case BIO_CTRL_PENDING:
510	0	case BIO_CTRL_WPENDING:
511	0	ret = 0;
512	0	break;
513	0	case BIO_CTRL_FLUSH:
514	0	break;
515	0	case BIO_CTRL_DUP:
516	0	{
517	0	dbio = (BIO *)ptr;
518	0	if (data->param_hostname)
519	0	BIO_set_conn_hostname(dbio, data->param_hostname);
520	0	if (data->param_service)
521	0	BIO_set_conn_port(dbio, data->param_service);
522	0	BIO_set_conn_ip_family(dbio, data->connect_family);
523	0	BIO_set_conn_mode(dbio, data->connect_mode);
524		/*
525		* FIXME: the cast of the function seems unlikely to be a good
526		* idea
527		*/
528	0	(void)BIO_set_info_callback(dbio, data->info_callback);
529	0	}
530	0	break;
531	0	case BIO_CTRL_SET_CALLBACK:
532	0	ret = 0; /* use callback ctrl */
533	0	break;
534	0	case BIO_CTRL_GET_CALLBACK:
535	0	{
536	0	BIO_info_cb **fptr;
537
538	0	fptr = (BIO_info_cb **)ptr;
539	0	*fptr = data->info_callback;
540	0	}
541	0	break;
542	0	case BIO_CTRL_EOF:
543	0	ret = (b->flags & BIO_FLAGS_IN_EOF) != 0;
544	0	break;
545		# ifndef OPENSSL_NO_KTLS
546		case BIO_CTRL_SET_KTLS:
547		crypto_info = (ktls_crypto_info_t *)ptr;
548		ret = ktls_start(b->num, crypto_info, num);
549		if (ret)
550		BIO_set_ktls_flag(b, num);
551		break;
552		case BIO_CTRL_GET_KTLS_SEND:
553		return BIO_should_ktls_flag(b, 1) != 0;
554		case BIO_CTRL_GET_KTLS_RECV:
555		return BIO_should_ktls_flag(b, 0) != 0;
556		case BIO_CTRL_SET_KTLS_TX_SEND_CTRL_MSG:
557		BIO_set_ktls_ctrl_msg_flag(b);
558		data->record_type = num;
559		ret = 0;
560		break;
561		case BIO_CTRL_CLEAR_KTLS_TX_CTRL_MSG:
562		BIO_clear_ktls_ctrl_msg_flag(b);
563		ret = 0;
564		break;
565		# endif
566	0	default:
567	0	ret = 0;
568	0	break;
569	0	}
570	0	return ret;
571	0	}
572
573		static long conn_callback_ctrl(BIO b, int cmd, BIO_info_cb fp)
574	0	{
575	0	long ret = 1;
576	0	BIO_CONNECT *data;
577
578	0	data = (BIO_CONNECT *)b->ptr;
579
580	0	switch (cmd) {
581	0	case BIO_CTRL_SET_CALLBACK:
582	0	{
583	0	data->info_callback = fp;
584	0	}
585	0	break;
586	0	default:
587	0	ret = 0;
588	0	break;
589	0	}
590	0	return ret;
591	0	}
592
593		static int conn_puts(BIO bp, const char str)
594	0	{
595	0	int n, ret;
596
597	0	n = strlen(str);
598	0	ret = conn_write(bp, str, n);
599	0	return ret;
600	0	}
601
602		BIO BIO_new_connect(const char str)
603	0	{
604	0	BIO *ret;
605
606	0	ret = BIO_new(BIO_s_connect());
607	0	if (ret == NULL)
608	0	return NULL;
609	0	if (BIO_set_conn_hostname(ret, str))
610	0	return ret;
611	0	BIO_free(ret);
612		return NULL;
613	0	}
614
615		#endif