--- /dev/null
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.] */
+
+#include <openssl/bio.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+
+#if !defined(OPENSSL_WINDOWS)
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#else
+OPENSSL_MSVC_PRAGMA(warning(push, 3))
+#include <winsock2.h>
+#include <ws2tcpip.h>
+OPENSSL_MSVC_PRAGMA(warning(pop))
+#endif
+
+#include <openssl/buf.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+
+#include "internal.h"
+#include "../internal.h"
+
+
+enum {
+ BIO_CONN_S_BEFORE,
+ BIO_CONN_S_BLOCKED_CONNECT,
+ BIO_CONN_S_OK,
+};
+
+typedef struct bio_connect_st {
+ int state;
+
+ char *param_hostname;
+ char *param_port;
+ int nbio;
+
+ unsigned short port;
+
+ struct sockaddr_storage them;
+ socklen_t them_length;
+
+ // the file descriptor is kept in bio->num in order to match the socket
+ // BIO.
+
+ // info_callback is 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.
+ int (*info_callback)(const BIO *bio, int state, int ret);
+} BIO_CONNECT;
+
+#if !defined(OPENSSL_WINDOWS)
+static int closesocket(int sock) {
+ return close(sock);
+}
+#endif
+
+// split_host_and_port sets |*out_host| and |*out_port| to the host and port
+// parsed from |name|. It returns one on success or zero on error. Even when
+// successful, |*out_port| may be NULL on return if no port was specified.
+static int split_host_and_port(char **out_host, char **out_port, const char *name) {
+ const char *host, *port = NULL;
+ size_t host_len = 0;
+
+ *out_host = NULL;
+ *out_port = NULL;
+
+ if (name[0] == '[') { // bracketed IPv6 address
+ const char *close = strchr(name, ']');
+ if (close == NULL) {
+ return 0;
+ }
+ host = name + 1;
+ host_len = close - host;
+ if (close[1] == ':') { // [IP]:port
+ port = close + 2;
+ } else if (close[1] != 0) {
+ return 0;
+ }
+ } else {
+ const char *colon = strchr(name, ':');
+ if (colon == NULL || strchr(colon + 1, ':') != NULL) { // IPv6 address
+ host = name;
+ host_len = strlen(name);
+ } else { // host:port
+ host = name;
+ host_len = colon - name;
+ port = colon + 1;
+ }
+ }
+
+ *out_host = BUF_strndup(host, host_len);
+ if (*out_host == NULL) {
+ return 0;
+ }
+ if (port == NULL) {
+ *out_port = NULL;
+ return 1;
+ }
+ *out_port = OPENSSL_strdup(port);
+ if (*out_port == NULL) {
+ OPENSSL_free(*out_host);
+ *out_host = NULL;
+ return 0;
+ }
+ return 1;
+}
+
+static int conn_state(BIO *bio, BIO_CONNECT *c) {
+ int ret = -1, i;
+ int (*cb)(const BIO *, int, int) = NULL;
+
+ if (c->info_callback != NULL) {
+ cb = c->info_callback;
+ }
+
+ for (;;) {
+ switch (c->state) {
+ case BIO_CONN_S_BEFORE:
+ // If there's a hostname and a port, assume that both are
+ // exactly what they say. If there is only a hostname, try
+ // (just once) to split it into a hostname and port.
+
+ if (c->param_hostname == NULL) {
+ OPENSSL_PUT_ERROR(BIO, BIO_R_NO_HOSTNAME_SPECIFIED);
+ goto exit_loop;
+ }
+
+ if (c->param_port == NULL) {
+ char *host, *port;
+ if (!split_host_and_port(&host, &port, c->param_hostname) ||
+ port == NULL) {
+ OPENSSL_free(host);
+ OPENSSL_free(port);
+ OPENSSL_PUT_ERROR(BIO, BIO_R_NO_PORT_SPECIFIED);
+ ERR_add_error_data(2, "host=", c->param_hostname);
+ goto exit_loop;
+ }
+
+ OPENSSL_free(c->param_port);
+ c->param_port = port;
+ OPENSSL_free(c->param_hostname);
+ c->param_hostname = host;
+ }
+
+ if (!bio_ip_and_port_to_socket_and_addr(
+ &bio->num, &c->them, &c->them_length, c->param_hostname,
+ c->param_port)) {
+ OPENSSL_PUT_ERROR(BIO, BIO_R_UNABLE_TO_CREATE_SOCKET);
+ ERR_add_error_data(4, "host=", c->param_hostname, ":", c->param_port);
+ goto exit_loop;
+ }
+
+ if (c->nbio) {
+ if (!bio_socket_nbio(bio->num, 1)) {
+ OPENSSL_PUT_ERROR(BIO, BIO_R_ERROR_SETTING_NBIO);
+ ERR_add_error_data(4, "host=", c->param_hostname, ":",
+ c->param_port);
+ goto exit_loop;
+ }
+ }
+
+ i = 1;
+ ret = setsockopt(bio->num, SOL_SOCKET, SO_KEEPALIVE, (char *)&i,
+ sizeof(i));
+ if (ret < 0) {
+ OPENSSL_PUT_SYSTEM_ERROR();
+ OPENSSL_PUT_ERROR(BIO, BIO_R_KEEPALIVE);
+ ERR_add_error_data(4, "host=", c->param_hostname, ":", c->param_port);
+ goto exit_loop;
+ }
+
+ BIO_clear_retry_flags(bio);
+ ret = connect(bio->num, (struct sockaddr*) &c->them, c->them_length);
+ if (ret < 0) {
+ if (bio_fd_should_retry(ret)) {
+ BIO_set_flags(bio, (BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY));
+ c->state = BIO_CONN_S_BLOCKED_CONNECT;
+ bio->retry_reason = BIO_RR_CONNECT;
+ } else {
+ OPENSSL_PUT_SYSTEM_ERROR();
+ OPENSSL_PUT_ERROR(BIO, BIO_R_CONNECT_ERROR);
+ ERR_add_error_data(4, "host=", c->param_hostname, ":",
+ c->param_port);
+ }
+ goto exit_loop;
+ } else {
+ c->state = BIO_CONN_S_OK;
+ }
+ break;
+
+ case BIO_CONN_S_BLOCKED_CONNECT:
+ i = bio_sock_error(bio->num);
+ if (i) {
+ if (bio_fd_should_retry(ret)) {
+ BIO_set_flags(bio, (BIO_FLAGS_IO_SPECIAL | BIO_FLAGS_SHOULD_RETRY));
+ c->state = BIO_CONN_S_BLOCKED_CONNECT;
+ bio->retry_reason = BIO_RR_CONNECT;
+ ret = -1;
+ } else {
+ BIO_clear_retry_flags(bio);
+ OPENSSL_PUT_SYSTEM_ERROR();
+ OPENSSL_PUT_ERROR(BIO, BIO_R_NBIO_CONNECT_ERROR);
+ ERR_add_error_data(4, "host=", c->param_hostname, ":", c->param_port);
+ ret = 0;
+ }
+ goto exit_loop;
+ } else {
+ c->state = BIO_CONN_S_OK;
+ }
+ break;
+
+ case BIO_CONN_S_OK:
+ ret = 1;
+ goto exit_loop;
+ default:
+ assert(0);
+ goto exit_loop;
+ }
+
+ if (cb != NULL) {
+ ret = cb((BIO *)bio, c->state, ret);
+ if (ret == 0) {
+ goto end;
+ }
+ }
+ }
+
+exit_loop:
+ if (cb != NULL) {
+ ret = cb((BIO *)bio, c->state, ret);
+ }
+
+end:
+ return ret;
+}
+
+static BIO_CONNECT *BIO_CONNECT_new(void) {
+ BIO_CONNECT *ret = OPENSSL_malloc(sizeof(BIO_CONNECT));
+
+ if (ret == NULL) {
+ return NULL;
+ }
+ OPENSSL_memset(ret, 0, sizeof(BIO_CONNECT));
+
+ ret->state = BIO_CONN_S_BEFORE;
+ return ret;
+}
+
+static void BIO_CONNECT_free(BIO_CONNECT *c) {
+ if (c == NULL) {
+ return;
+ }
+
+ OPENSSL_free(c->param_hostname);
+ OPENSSL_free(c->param_port);
+ OPENSSL_free(c);
+}
+
+static int conn_new(BIO *bio) {
+ bio->init = 0;
+ bio->num = -1;
+ bio->flags = 0;
+ bio->ptr = (char *)BIO_CONNECT_new();
+ return bio->ptr != NULL;
+}
+
+static void conn_close_socket(BIO *bio) {
+ BIO_CONNECT *c = (BIO_CONNECT *) bio->ptr;
+
+ if (bio->num == -1) {
+ return;
+ }
+
+ // Only do a shutdown if things were established
+ if (c->state == BIO_CONN_S_OK) {
+ shutdown(bio->num, 2);
+ }
+ closesocket(bio->num);
+ bio->num = -1;
+}
+
+static int conn_free(BIO *bio) {
+ if (bio == NULL) {
+ return 0;
+ }
+
+ if (bio->shutdown) {
+ conn_close_socket(bio);
+ }
+
+ BIO_CONNECT_free((BIO_CONNECT*) bio->ptr);
+
+ return 1;
+}
+
+static int conn_read(BIO *bio, char *out, int out_len) {
+ int ret = 0;
+ BIO_CONNECT *data;
+
+ data = (BIO_CONNECT *)bio->ptr;
+ if (data->state != BIO_CONN_S_OK) {
+ ret = conn_state(bio, data);
+ if (ret <= 0) {
+ return ret;
+ }
+ }
+
+ bio_clear_socket_error();
+ ret = recv(bio->num, out, out_len, 0);
+ BIO_clear_retry_flags(bio);
+ if (ret <= 0) {
+ if (bio_fd_should_retry(ret)) {
+ BIO_set_retry_read(bio);
+ }
+ }
+
+ return ret;
+}
+
+static int conn_write(BIO *bio, const char *in, int in_len) {
+ int ret;
+ BIO_CONNECT *data;
+
+ data = (BIO_CONNECT *)bio->ptr;
+ if (data->state != BIO_CONN_S_OK) {
+ ret = conn_state(bio, data);
+ if (ret <= 0) {
+ return ret;
+ }
+ }
+
+ bio_clear_socket_error();
+ ret = send(bio->num, in, in_len, 0);
+ BIO_clear_retry_flags(bio);
+ if (ret <= 0) {
+ if (bio_fd_should_retry(ret)) {
+ BIO_set_retry_write(bio);
+ }
+ }
+
+ return ret;
+}
+
+static long conn_ctrl(BIO *bio, int cmd, long num, void *ptr) {
+ int *ip;
+ long ret = 1;
+ BIO_CONNECT *data;
+
+ data = (BIO_CONNECT *)bio->ptr;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ ret = 0;
+ data->state = BIO_CONN_S_BEFORE;
+ conn_close_socket(bio);
+ bio->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(bio, data);
+ } else {
+ ret = 1;
+ }
+ break;
+ case BIO_C_SET_CONNECT:
+ if (ptr != NULL) {
+ bio->init = 1;
+ if (num == 0) {
+ OPENSSL_free(data->param_hostname);
+ data->param_hostname = BUF_strdup(ptr);
+ if (data->param_hostname == NULL) {
+ ret = 0;
+ }
+ } else if (num == 1) {
+ OPENSSL_free(data->param_port);
+ data->param_port = BUF_strdup(ptr);
+ if (data->param_port == NULL) {
+ ret = 0;
+ }
+ } else {
+ ret = 0;
+ }
+ }
+ break;
+ case BIO_C_SET_NBIO:
+ data->nbio = (int)num;
+ break;
+ case BIO_C_GET_FD:
+ if (bio->init) {
+ ip = (int *)ptr;
+ if (ip != NULL) {
+ *ip = bio->num;
+ }
+ ret = bio->num;
+ } else {
+ ret = -1;
+ }
+ break;
+ case BIO_CTRL_GET_CLOSE:
+ ret = bio->shutdown;
+ break;
+ case BIO_CTRL_SET_CLOSE:
+ bio->shutdown = (int)num;
+ break;
+ case BIO_CTRL_PENDING:
+ case BIO_CTRL_WPENDING:
+ ret = 0;
+ break;
+ case BIO_CTRL_FLUSH:
+ break;
+ case BIO_CTRL_GET_CALLBACK: {
+ int (**fptr)(const BIO *bio, int state, int xret);
+ fptr = (int (**)(const BIO *bio, int state, int xret))ptr;
+ *fptr = data->info_callback;
+ } break;
+ default:
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static long conn_callback_ctrl(BIO *bio, int cmd, bio_info_cb fp) {
+ long ret = 1;
+ BIO_CONNECT *data;
+
+ data = (BIO_CONNECT *)bio->ptr;
+
+ switch (cmd) {
+ case BIO_CTRL_SET_CALLBACK:
+ data->info_callback = (int (*)(const struct bio_st *, int, int))fp;
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+BIO *BIO_new_connect(const char *hostname) {
+ BIO *ret;
+
+ ret = BIO_new(BIO_s_connect());
+ if (ret == NULL) {
+ return NULL;
+ }
+ if (!BIO_set_conn_hostname(ret, hostname)) {
+ BIO_free(ret);
+ return NULL;
+ }
+ return ret;
+}
+
+static const BIO_METHOD methods_connectp = {
+ BIO_TYPE_CONNECT, "socket connect", conn_write, conn_read,
+ NULL /* puts */, NULL /* gets */, conn_ctrl, conn_new,
+ conn_free, conn_callback_ctrl,
+};
+
+const BIO_METHOD *BIO_s_connect(void) { return &methods_connectp; }
+
+int BIO_set_conn_hostname(BIO *bio, const char *name) {
+ return BIO_ctrl(bio, BIO_C_SET_CONNECT, 0, (void*) name);
+}
+
+int BIO_set_conn_port(BIO *bio, const char *port_str) {
+ return BIO_ctrl(bio, BIO_C_SET_CONNECT, 1, (void*) port_str);
+}
+
+int BIO_set_conn_int_port(BIO *bio, const int *port) {
+ char buf[DECIMAL_SIZE(int) + 1];
+ BIO_snprintf(buf, sizeof(buf), "%d", *port);
+ return BIO_set_conn_port(bio, buf);
+}
+
+int BIO_set_nbio(BIO *bio, int on) {
+ return BIO_ctrl(bio, BIO_C_SET_NBIO, on, NULL);
+}
+
+int BIO_do_connect(BIO *bio) {
+ return BIO_ctrl(bio, BIO_C_DO_STATE_MACHINE, 0, NULL);
+}
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