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-rw-r--r--src/crypto/bio/connect.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/src/crypto/bio/connect.c b/src/crypto/bio/connect.c
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--- /dev/null
+++ b/src/crypto/bio/connect.c
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+/* 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 <stdio.h>
+#include <string.h>
+
+#if !defined(OPENSSL_WINDOWS)
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+#else
+#pragma warning(push, 3)
+#include <WinSock2.h>
+#include <WS2tcpip.h>
+#pragma warning(pop)
+#endif
+
+#include <openssl/buf.h>
+#include <openssl/err.h>
+#include <openssl/mem.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;
+
+ uint8_t ip[4];
+ 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
+
+/* maybe_copy_ipv4_address sets |*ipv4| to the IPv4 address from |ss| (in
+ * big-endian order), if |ss| contains an IPv4 socket address. */
+static void maybe_copy_ipv4_address(uint8_t *ipv4,
+ const struct sockaddr_storage *ss) {
+ const struct sockaddr_in *sin;
+
+ if (ss->ss_family != AF_INET) {
+ return;
+ }
+
+ sin = (const struct sockaddr_in*) ss;
+ memcpy(ipv4, &sin->sin_addr, 4);
+}
+
+static int conn_state(BIO *bio, BIO_CONNECT *c) {
+ int ret = -1, i;
+ char *p, *q;
+ 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:
+ p = c->param_hostname;
+ if (p == NULL) {
+ OPENSSL_PUT_ERROR(BIO, conn_state, BIO_R_NO_HOSTNAME_SPECIFIED);
+ goto exit_loop;
+ }
+ for (; *p != 0; p++) {
+ if (*p == ':' || *p == '/') {
+ break;
+ }
+ }
+
+ i = *p;
+ if (i == ':' || i == '/') {
+ *(p++) = 0;
+ if (i == ':') {
+ for (q = p; *q; q++) {
+ if (*q == '/') {
+ *q = 0;
+ break;
+ }
+ }
+ if (c->param_port != NULL) {
+ OPENSSL_free(c->param_port);
+ }
+ c->param_port = BUF_strdup(p);
+ }
+ }
+
+ if (c->param_port == NULL) {
+ OPENSSL_PUT_ERROR(BIO, conn_state, BIO_R_NO_PORT_SPECIFIED);
+ ERR_add_error_data(2, "host=", c->param_hostname);
+ goto exit_loop;
+ }
+
+ 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, conn_state, BIO_R_UNABLE_TO_CREATE_SOCKET);
+ ERR_add_error_data(4, "host=", c->param_hostname, ":", c->param_port);
+ goto exit_loop;
+ }
+
+ memset(c->ip, 0, 4);
+ maybe_copy_ipv4_address(c->ip, &c->them);
+
+ if (c->nbio) {
+ if (!bio_socket_nbio(bio->num, 1)) {
+ OPENSSL_PUT_ERROR(BIO, conn_state, 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(setsockopt);
+ OPENSSL_PUT_ERROR(BIO, conn_state, 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(connect);
+ OPENSSL_PUT_ERROR(BIO, conn_state, 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(connect);
+ OPENSSL_PUT_ERROR(BIO, conn_state, 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;
+ }
+ 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;
+ }
+
+ if (c->param_hostname != NULL) {
+ OPENSSL_free(c->param_hostname);
+ }
+ if (c->param_port != NULL) {
+ 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;
+ const char **pptr;
+ 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_GET_CONNECT:
+ /* TODO(fork): can this be removed? (Or maybe this whole file). */
+ if (ptr != NULL) {
+ pptr = (const char **)ptr;
+ if (num == 0) {
+ *pptr = data->param_hostname;
+ } else if (num == 1) {
+ *pptr = data->param_port;
+ } else if (num == 2) {
+ *pptr = (char *) &data->ip[0];
+ } else if (num == 3) {
+ *((int *)ptr) = data->port;
+ }
+ if (!bio->init) {
+ *pptr = "not initialized";
+ }
+ ret = 1;
+ }
+ break;
+ case BIO_C_SET_CONNECT:
+ if (ptr != NULL) {
+ bio->init = 1;
+ if (num == 0) {
+ if (data->param_hostname != NULL) {
+ OPENSSL_free(data->param_hostname);
+ }
+ data->param_hostname = BUF_strdup(ptr);
+ } else if (num == 1) {
+ if (data->param_port != NULL) {
+ OPENSSL_free(data->param_port);
+ }
+ data->param_port = BUF_strdup(ptr);
+ } 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 = 1;
+ } else {
+ ret = 0;
+ }
+ 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_SET_CALLBACK: {
+#if 0 /* FIXME: Should this be used? -- Richard Levitte */
+ OPENSSL_PUT_ERROR(BIO, XXX, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+ ret = -1;
+#else
+ ret = 0;
+#endif
+ } 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;
+}
+
+static int conn_puts(BIO *bp, const char *str) {
+ return conn_write(bp, str, strlen(str));
+}
+
+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,
+ conn_puts, NULL /* connect_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_nbio(BIO *bio, int on) {
+ return BIO_ctrl(bio, BIO_C_SET_NBIO, on, NULL);
+}
generated by cgit v1.1 at 2024-08-07 02:04:18 +0000