diff options
Diffstat (limited to 'openssl/crypto/bio/bss_conn.c')
| -rw-r--r-- | openssl/crypto/bio/bss_conn.c | 612 |
1 files changed, 612 insertions, 0 deletions
diff --git a/openssl/crypto/bio/bss_conn.c b/openssl/crypto/bio/bss_conn.c new file mode 100644 index 0000000..7d15ad2 --- /dev/null +++ b/openssl/crypto/bio/bss_conn.c @@ -0,0 +1,612 @@ +/* crypto/bio/bss_conn.c */ +/* 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 <stdio.h> +#include <errno.h> +#define USE_SOCKETS +#include "cryptlib.h" +#include <openssl/bio.h> + +#ifndef OPENSSL_NO_SOCK + +# ifdef OPENSSL_SYS_WIN16 +# define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ +# else +# define SOCKET_PROTOCOL IPPROTO_TCP +# endif + +# if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000) +/* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */ +# undef FIONBIO +# endif + +typedef struct bio_connect_st { + int state; + char *param_hostname; + char *param_port; + int nbio; + unsigned char ip[4]; + unsigned short port; + struct sockaddr_in them; + /* + * 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 + */ + int (*info_callback) (const BIO *bio, int state, int ret); +} 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); + +static 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, +}; + +static int conn_state(BIO *b, BIO_CONNECT *c) +{ + int ret = -1, i; + unsigned long l; + 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) { + BIOerr(BIO_F_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) { + BIOerr(BIO_F_CONN_STATE, BIO_R_NO_PORT_SPECIFIED); + ERR_add_error_data(2, "host=", c->param_hostname); + goto exit_loop; + } + c->state = BIO_CONN_S_GET_IP; + break; + + case BIO_CONN_S_GET_IP: + if (BIO_get_host_ip(c->param_hostname, &(c->ip[0])) <= 0) + goto exit_loop; + c->state = BIO_CONN_S_GET_PORT; + break; + + case BIO_CONN_S_GET_PORT: + if (c->param_port == NULL) { + /* abort(); */ + goto exit_loop; + } else if (BIO_get_port(c->param_port, &c->port) <= 0) + goto exit_loop; + c->state = BIO_CONN_S_CREATE_SOCKET; + break; + + case BIO_CONN_S_CREATE_SOCKET: + /* now setup address */ + memset((char *)&c->them, 0, sizeof(c->them)); + c->them.sin_family = AF_INET; + c->them.sin_port = htons((unsigned short)c->port); + l = (unsigned long) + ((unsigned long)c->ip[0] << 24L) | + ((unsigned long)c->ip[1] << 16L) | + ((unsigned long)c->ip[2] << 8L) | ((unsigned long)c->ip[3]); + c->them.sin_addr.s_addr = htonl(l); + c->state = BIO_CONN_S_CREATE_SOCKET; + + ret = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL); + if (ret == INVALID_SOCKET) { + SYSerr(SYS_F_SOCKET, get_last_socket_error()); + ERR_add_error_data(4, "host=", c->param_hostname, + ":", c->param_port); + BIOerr(BIO_F_CONN_STATE, BIO_R_UNABLE_TO_CREATE_SOCKET); + goto exit_loop; + } + b->num = ret; + c->state = BIO_CONN_S_NBIO; + break; + + case BIO_CONN_S_NBIO: + if (c->nbio) { + if (!BIO_socket_nbio(b->num, 1)) { + BIOerr(BIO_F_CONN_STATE, BIO_R_ERROR_SETTING_NBIO); + ERR_add_error_data(4, "host=", + c->param_hostname, ":", c->param_port); + goto exit_loop; + } + } + c->state = BIO_CONN_S_CONNECT; + +# if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE) + i = 1; + i = setsockopt(b->num, SOL_SOCKET, SO_KEEPALIVE, (char *)&i, + sizeof(i)); + if (i < 0) { + SYSerr(SYS_F_SOCKET, get_last_socket_error()); + ERR_add_error_data(4, "host=", c->param_hostname, + ":", c->param_port); + BIOerr(BIO_F_CONN_STATE, BIO_R_KEEPALIVE); + goto exit_loop; + } +# endif + break; + + case BIO_CONN_S_CONNECT: + BIO_clear_retry_flags(b); + ret = connect(b->num, + (struct sockaddr *)&c->them, sizeof(c->them)); + 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; + } else { + SYSerr(SYS_F_CONNECT, get_last_socket_error()); + ERR_add_error_data(4, "host=", + c->param_hostname, ":", c->param_port); + BIOerr(BIO_F_CONN_STATE, BIO_R_CONNECT_ERROR); + } + goto exit_loop; + } else + c->state = BIO_CONN_S_OK; + break; + + case BIO_CONN_S_BLOCKED_CONNECT: + i = BIO_sock_error(b->num); + if (i) { + BIO_clear_retry_flags(b); + SYSerr(SYS_F_CONNECT, i); + ERR_add_error_data(4, "host=", + c->param_hostname, ":", c->param_port); + BIOerr(BIO_F_CONN_STATE, BIO_R_NBIO_CONNECT_ERROR); + ret = 0; + goto exit_loop; + } else + c->state = BIO_CONN_S_OK; + break; + + case BIO_CONN_S_OK: + ret = 1; + goto exit_loop; + default: + /* abort(); */ + goto exit_loop; + } + + if (cb != NULL) { + if (!(ret = cb((BIO *)b, c->state, ret))) + 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 = (BIO_CONNECT *)OPENSSL_malloc(sizeof(BIO_CONNECT))) == NULL) + return (NULL); + ret->state = BIO_CONN_S_BEFORE; + ret->param_hostname = NULL; + ret->param_port = NULL; + ret->info_callback = NULL; + ret->nbio = 0; + ret->ip[0] = 0; + ret->ip[1] = 0; + ret->ip[2] = 0; + ret->ip[3] = 0; + ret->port = 0; + memset((char *)&ret->them, 0, sizeof(ret->them)); + return (ret); +} + +void BIO_CONNECT_free(BIO_CONNECT *a) +{ + if (a == NULL) + return; + + if (a->param_hostname != NULL) + OPENSSL_free(a->param_hostname); + if (a->param_port != NULL) + OPENSSL_free(a->param_port); + OPENSSL_free(a); +} + +BIO_METHOD *BIO_s_connect(void) +{ + return (&methods_connectp); +} + +static int conn_new(BIO *bi) +{ + bi->init = 0; + bi->num = 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 != INVALID_SOCKET) { + /* Only do a shutdown if things were established */ + if (c->state == BIO_CONN_S_OK) + shutdown(bio->num, 2); + closesocket(bio->num); + bio->num = 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(); + 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); + } + } + 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(); + 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; + + data = (BIO_CONNECT *)b->ptr; + + switch (cmd) { + case BIO_CTRL_RESET: + ret = 0; + data->state = BIO_CONN_S_BEFORE; + conn_close_socket(b); + 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 (b->init) { + if (pptr != NULL) { + ret = 1; + 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 { + ret = 0; + } + } + if (num == 3) { + ret = data->port; + } + } else { + if (pptr != NULL) + *pptr = "not initialized"; + ret = 0; + } + break; + case BIO_C_SET_CONNECT: + if (ptr != NULL) { + b->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 if (num == 2) { + char buf[16]; + unsigned char *p = ptr; + + BIO_snprintf(buf, sizeof buf, "%d.%d.%d.%d", + p[0], p[1], p[2], p[3]); + if (data->param_hostname != NULL) + OPENSSL_free(data->param_hostname); + data->param_hostname = BUF_strdup(buf); + memcpy(&(data->ip[0]), ptr, 4); + } else if (num == 3) { + char buf[DECIMAL_SIZE(int) + 1]; + + BIO_snprintf(buf, sizeof buf, "%d", *(int *)ptr); + if (data->param_port != NULL) + OPENSSL_free(data->param_port); + data->param_port = BUF_strdup(buf); + data->port = *(int *)ptr; + } + } + break; + case BIO_C_SET_NBIO: + data->nbio = (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_port) + BIO_set_conn_port(dbio, data->param_port); + if (data->param_hostname) + BIO_set_conn_hostname(dbio, data->param_hostname); + BIO_set_nbio(dbio, data->nbio); + /* + * FIXME: the cast of the function seems unlikely to be a good + * idea + */ + (void)BIO_set_info_callback(dbio, + (bio_info_cb *)data->info_callback); + } + break; + case BIO_CTRL_SET_CALLBACK: + { +# if 0 /* FIXME: Should this be used? -- Richard + * Levitte */ + BIOerr(BIO_F_CONN_CTRL, 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 *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 = + (int (*)(const struct bio_st *, int, int))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); + else { + BIO_free(ret); + return (NULL); + } +} + +#endif |