wsbc.c

The Kannel Open Source WAP and SMS gateway works as both an SMS gateway, for implementing keyword b

/* ==================================================================== 
 * The Kannel Software License, Version 1.0 
 * 
 * Copyright (c) 2001-2004 Kannel Group  
 * Copyright (c) 1998-2001 WapIT Ltd.   
 * All rights reserved. 
 * 
 * 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 above 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. The end-user documentation included with the redistribution, 
 *    if any, must include the following acknowledgment: 
 *       "This product includes software developed by the 
 *        Kannel Group (http://www.kannel.org/)." 
 *    Alternately, this acknowledgment may appear in the software itself, 
 *    if and wherever such third-party acknowledgments normally appear. 
 * 
 * 4. The names "Kannel" and "Kannel Group" must not be used to 
 *    endorse or promote products derived from this software without 
 *    prior written permission. For written permission, please  
 *    contact [e-mail]. 
 * 
 * 5. Products derived from this software may not be called "Kannel", 
 *    nor may "Kannel" appear in their name, without prior written 
 *    permission of the Kannel Group. 
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 KANNEL GROUP OR ITS 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. 
 * ==================================================================== 
 * 
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Kannel Group.  For more information on  
 * the Kannel Group, please see <http://www.kannel.org/>. 
 * 
 * Portions of this software are based upon software originally written at  
 * WapIT Ltd., Helsinki, Finland for the Kannel project.  
 */ 

/*
 *
 * wsbc.c
 *
 * Author: Markku Rossi <[e-mail]>
 *
 * Copyright (c) 1999-2000 WAPIT OY LTD.
 *		 All rights reserved.
 *
 * Byte-code handling functions.
 *
 */

#include "wsint.h"
#include "wsbc.h"

/********************* Prototypes for static functions ******************/

/* Add a new pragma of type `type' to the byte-code `bc'.  The
 * function returns a pointer to an internal pragma structure that
 * must not be freed by the caller.  It is freed when the byte-code
 * `bc' is freed.  The function returns NULL if the pragma structure
 * could not be allocated. */
static WsBcPragma *add_pragma(WsBc *bc, WsBcPragmaType type);

/********************* Manipulating byte-code structure *****************/

WsBc *ws_bc_alloc(WsBcStringEncoding string_encoding)
{
    WsBc *bc = ws_calloc(1, sizeof(WsBc));

    if (bc == NULL)
        return NULL;

    bc->string_encoding = string_encoding;

    return bc;
}


void ws_bc_free(WsBc *bc)
{
    WsUInt16 i;
    WsUInt8 j;

    if (bc == NULL)
        return;

    /* Free constants. */
    for (i = 0; i < bc->num_constants; i++) {
        WsBcConstant *c = &bc->constants[i];

        if (c->type == WS_BC_CONST_TYPE_UTF8_STRING)
            ws_free(c->u.v_string.data);
    }
    ws_free(bc->constants);

    /* Free pragmas. */
    ws_free(bc->pragmas);

    /* Free function names. */
    for (j = 0; j < bc->num_function_names; j++)
        ws_free(bc->function_names[j].name);
    ws_free(bc->function_names);

    /* Free functions. */
    for (j = 0; j < bc->num_functions; j++)
        ws_free(bc->functions[j].code);
    ws_free(bc->functions);

    /* Free the byte-code structure. */
    ws_free(bc);
}


WsBool ws_bc_encode(WsBc *bc, unsigned char **data_return,
                    size_t *data_len_return)
{
    WsBuffer buffer;
    WsUInt32 ui;
    unsigned char data[64];
    unsigned char *p, *mb;
    size_t len;

    ws_buffer_init(&buffer);

    /* Append space for the header.  We do not know yet the size of the
       resulting byte-code. */
    if (!ws_buffer_append_space(&buffer, NULL, WS_BC_MAX_HEADER_LEN))
        goto error;


    /* Constants. */

    if (!ws_encode_buffer(&buffer,
                          WS_ENC_MB_UINT16, bc->num_constants,
                          WS_ENC_MB_UINT16, (WsUInt16) bc->string_encoding,
                          WS_ENC_END))
        goto error;

    for (ui = 0 ; ui < bc->num_constants; ui++) {
        switch (bc->constants[ui].type) {
        case WS_BC_CONST_TYPE_INT:
            if (WS_INT8_MIN <= bc->constants[ui].u.v_int
                && bc->constants[ui].u.v_int <= WS_INT8_MAX) {
                if (!ws_encode_buffer(&buffer,
                                      WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_INT8,
                                      WS_ENC_INT8,
                                      (WsInt8) bc->constants[ui].u.v_int,
                                      WS_ENC_END))
                    goto error;
            } else if (WS_INT16_MIN <= bc->constants[ui].u.v_int
                       && bc->constants[ui].u.v_int <= WS_INT16_MAX) {
                if (!ws_encode_buffer(&buffer,
                                      WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_INT16,
                                      WS_ENC_INT16,
                                      (WsInt16) bc->constants[ui].u.v_int,
                                      WS_ENC_END))
                    goto error;
            } else {
                if (!ws_encode_buffer(&buffer,
                                      WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_INT32,
                                      WS_ENC_INT32, bc->constants[ui].u.v_int,
                                      WS_ENC_END))
                    goto error;
            }
            break;

        case WS_BC_CONST_TYPE_FLOAT32:
        case WS_BC_CONST_TYPE_FLOAT32_NAN:
        case WS_BC_CONST_TYPE_FLOAT32_POSITIVE_INF:
        case WS_BC_CONST_TYPE_FLOAT32_NEGATIVE_INF:
            switch (bc->constants[ui].type) {
            case WS_BC_CONST_TYPE_FLOAT32:
                ws_ieee754_encode_single(bc->constants[ui].u.v_float, data);
                p = data;
                break;

            case WS_BC_CONST_TYPE_FLOAT32_NAN:
                p = ws_ieee754_nan;
                break;

            case WS_BC_CONST_TYPE_FLOAT32_POSITIVE_INF:
                p = ws_ieee754_positive_inf;
                break;

            case WS_BC_CONST_TYPE_FLOAT32_NEGATIVE_INF:
                p = ws_ieee754_negative_inf;
                break;

            default:
                ws_fatal("ws_bc_encode(): internal inconsistency");
                /* NOTREACHED */
                p = NULL; 		/* Initialized to keep compiler quiet. */
                break;
            }

            if (!ws_encode_buffer(&buffer,
                                  WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_FLOAT32,
                                  WS_ENC_DATA, p, 4,
                                  WS_ENC_END))
                goto error;
            break;

            break;

        case WS_BC_CONST_TYPE_UTF8_STRING:
            /* Encode the strings as requested. */
            switch (bc->string_encoding) {
            case WS_BC_STRING_ENC_ISO_8859_1:
                {
                    WsUtf8String *string = ws_utf8_alloc();
                    unsigned char *latin1;
                    size_t latin1_len;
                    WsBool success;

                    if (string == NULL)
                        goto error;

                    /* Create an UTF-8 string. */
                    if (!ws_utf8_set_data(string,
                                          bc->constants[ui].u.v_string.data,
                                          bc->constants[ui].u.v_string.len)) {
                        ws_utf8_free(string);
                        goto error;
                    }

                    /* Convert it to latin1. */
                    latin1 = ws_utf8_to_latin1(string, '?', &latin1_len);

                    /* We'r done with the UTF-8 string. */
                    ws_utf8_free(string);

                    if (latin1 == NULL)
                        goto error;

                    /* Encode it. */
                    success = ws_encode_buffer(
                                  &buffer,
                                  WS_ENC_UINT8,
                                  (WsUInt8) WS_BC_CONST_EXT_ENC_STRING,

                                  WS_ENC_MB_UINT32, (WsUInt32) latin1_len,
                                  WS_ENC_DATA, latin1, latin1_len,

                                  WS_ENC_END);
                    ws_utf8_free_data(latin1);

                    if (!success)
                        goto error;
                }
                break;

            case WS_BC_STRING_ENC_UTF8:
                if (!ws_encode_buffer(
                        &buffer,
                        WS_ENC_UINT8,
                        (WsUInt8) WS_BC_CONST_UTF8_STRING,

                        WS_ENC_MB_UINT32,
                        (WsUInt32) bc->constants[ui].u.v_string.len,

                        WS_ENC_DATA,
                        bc->constants[ui].u.v_string.data,
                        bc->constants[ui].u.v_string.len,

                        WS_ENC_END))
                    goto error;
                break;
            }
            break;

        case WS_BC_CONST_TYPE_EMPTY_STRING:
            if (!ws_encode_buffer(&buffer,
                                  WS_ENC_UINT8,
                                  (WsUInt8) WS_BC_CONST_EMPTY_STRING,
                                  WS_ENC_END))
                goto error;
            break;
        }
    }


    /* Pragmas. */

    if (!ws_encode_buffer(&buffer,
                          WS_ENC_MB_UINT16, bc->num_pragmas,
                          WS_ENC_END))
        goto error;

    for (ui = 0; ui < bc->num_pragmas; ui++) {
        switch (bc->pragmas[ui].type) {
        case WS_BC_PRAGMA_TYPE_ACCESS_DOMAIN:
            if (!ws_encode_buffer(&buffer,
                                  WS_ENC_UINT8,
                                  (WsUInt8) WS_BC_PRAGMA_ACCESS_DOMAIN,

                                  WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
                                  WS_ENC_END))
                goto error;
            break;

        case WS_BC_PRAGMA_TYPE_ACCESS_PATH:
            if (!ws_encode_buffer(&buffer,
                                  WS_ENC_UINT8,
                                  (WsUInt8) WS_BC_PRAGMA_ACCESS_PATH,
                                  WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
                                  WS_ENC_END))
                goto error;
            break;

        case WS_BC_PRAGMA_TYPE_USER_AGENT_PROPERTY:
            if (!ws_encode_buffer(&buffer,
                                  WS_ENC_UINT8,
                                  (WsUInt8) WS_BC_PRAGMA_USER_AGENT_PROPERTY,
                                  WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
                                  WS_ENC_MB_UINT16, bc->pragmas[ui].index_2,
                                  WS_ENC_END))
                goto error;
            break;

        case WS_BC_PRAGMA_TYPE_USER_AGENT_PROPERTY_AND_SCHEME:
            if (!ws_encode_buffer(
                    &buffer,
                    WS_ENC_UINT8,
                    (WsUInt8) WS_BC_PRAGMA_USER_AGENT_PROPERTY_AND_SCHEME,
                    WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
                    WS_ENC_MB_UINT16, bc->pragmas[ui].index_2,
                    WS_ENC_MB_UINT16, bc->pragmas[ui].index_3,
                    WS_ENC_END))
                goto error;
            break;
        }
    }


    /* Function pool. */

    if (!ws_encode_buffer(&buffer,
                          WS_ENC_UINT8, bc->num_functions,
                          WS_ENC_END))
        goto error;

    /* Function names. */

    if (!ws_encode_buffer(&buffer,
                          WS_ENC_UINT8, bc->num_function_names,
                          WS_ENC_END))
        goto error;

    for (ui = 0; ui < bc->num_function_names; ui++) {
        size_t name_len = strlen(bc->function_names[ui].name);

        if (!ws_encode_buffer(&buffer,
                              WS_ENC_UINT8, bc->function_names[ui].index,
                              WS_ENC_UINT8, (WsUInt8) name_len,
                              WS_ENC_DATA, bc->function_names[ui].name, name_len,
                              WS_ENC_END))