rtsp_start_line.h

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/*
 * Copyright 2008-2015 Arsen Chaloyan
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef RTSP_START_LINE_H
#define RTSP_START_LINE_H

/**
 * @file rtsp_start_line.h
 * @brief RTSP Start Line (request-line/status-line)
 */ 

#include "rtsp.h"
#include "apt_text_stream.h"

APT_BEGIN_EXTERN_C

/** Protocol version */
typedef enum {
    /** Unknown version */
    RTSP_VERSION_UNKNOWN = 0, 
    /** RTSP 1.0 */
    RTSP_VERSION_1 = 1, 
} rtsp_version_e;

/** RTSP message types */
typedef enum {
    RTSP_MESSAGE_TYPE_UNKNOWN,
    RTSP_MESSAGE_TYPE_REQUEST,
    RTSP_MESSAGE_TYPE_RESPONSE
} rtsp_message_type_e;

/** RTSP methods */
typedef enum{
    RTSP_METHOD_SETUP,
    RTSP_METHOD_ANNOUNCE,
    RTSP_METHOD_TEARDOWN,
    RTSP_METHOD_DESCRIBE,

    RTSP_METHOD_COUNT,
    RTSP_METHOD_UNKNOWN = RTSP_METHOD_COUNT
} rtsp_method_id;

/** Status codes */
typedef enum {
    RTSP_STATUS_CODE_UNKNOWN                   = 0,
    /** Success codes (2xx) */
    RTSP_STATUS_CODE_OK                        = 200,
    RTSP_STATUS_CODE_CREATED                   = 201,
    /** Failure codec (4xx) */
    RTSP_STATUS_CODE_BAD_REQUEST               = 400,
    RTSP_STATUS_CODE_UNAUTHORIZED              = 401,
    RTSP_STATUS_CODE_NOT_FOUND                 = 404,
    RTSP_STATUS_CODE_METHOD_NOT_ALLOWED        = 405,
    RTSP_STATUS_CODE_NOT_ACCEPTABLE            = 406,
    RTSP_STATUS_CODE_PROXY_AUTH_REQUIRED       = 407,
    RTSP_STATUS_CODE_REQUEST_TIMEOUT           = 408,
    RTSP_STATUS_CODE_SESSION_NOT_FOUND         = 454,

    RTSP_STATUS_CODE_INTERNAL_SERVER_ERROR     = 500,
    RTSP_STATUS_CODE_NOT_IMPLEMENTED           = 501,
    RTSP_STATUS_CODE_SERVICE_UNAVAILABLE       = 503
} rtsp_status_code_e;

/** Reason phrases */
typedef enum {
    RTSP_REASON_PHRASE_OK,
    RTSP_REASON_PHRASE_CREATED,
    RTSP_REASON_PHRASE_BAD_REQUEST,
    RTSP_REASON_PHRASE_UNAUTHORIZED,
    RTSP_REASON_PHRASE_NOT_FOUND,
    RTSP_REASON_PHRASE_METHOD_NOT_ALLOWED,
    RTSP_REASON_PHRASE_NOT_ACCEPTABLE,
    RTSP_REASON_PHRASE_PROXY_AUTH_REQUIRED,
    RTSP_REASON_PHRASE_REQUEST_TIMEOUT,
    RTSP_REASON_PHRASE_SESSION_NOT_FOUND,
    RTSP_REASON_PHRASE_INTERNAL_SERVER_ERROR,
    RTSP_REASON_PHRASE_NOT_IMPLEMENTED,
    RTSP_REASON_PHRASE_SERVICE_UNAVAILABLE,
    RTSP_REASON_PHRASE_COUNT,

    /** Unknown reason phrase */
    RTSP_REASON_PHRASE_UNKNOWN = RTSP_REASON_PHRASE_COUNT
} rtsp_reason_phrase_e;


/** RTSP request-line declaration */
typedef struct rtsp_request_line_t rtsp_request_line_t;
/** RTSP status-line declaration */
typedef struct rtsp_status_line_t rtsp_status_line_t;
/** RTSP start-line declaration */
typedef struct rtsp_start_line_t rtsp_start_line_t;

/** RTSP request-line */
struct rtsp_request_line_t {
    /** Method name */
    apt_str_t      method_name;
    /** Method id */
    rtsp_method_id method_id;
    /** RTSP URL */
    apt_str_t      url;
    /** Resource name parsed from RTSP URL */
    const char    *resource_name;
    /** Version of protocol in use */
    rtsp_version_e version;
};

/** RTSP status-line */
struct rtsp_status_line_t {
    /** Version of protocol in use */
    rtsp_version_e     version;
    /** success or failure or other status of the request */
    rtsp_status_code_e status_code;
    /** Reason phrase */
    apt_str_t          reason;
};

/** RTSP start-line */
struct rtsp_start_line_t {
    /** RTSP message type */
    rtsp_message_type_e     message_type;
    /** RTSP start-line */
    union {
        rtsp_request_line_t request_line;
        rtsp_status_line_t  status_line;
    } common;
};


static APR_INLINE void rtsp_request_line_init(rtsp_request_line_t *request_line)
{
    apt_string_reset(&request_line->method_name);
    request_line->method_id = RTSP_METHOD_UNKNOWN;
    apt_string_reset(&request_line->url);
    request_line->resource_name = NULL;
    request_line->version = RTSP_VERSION_1;
}

static APR_INLINE void rtsp_status_line_init(rtsp_status_line_t *status_line)
{
    status_line->version = RTSP_VERSION_1;
    status_line->status_code = RTSP_STATUS_CODE_OK;
    apt_string_reset(&status_line->reason);
}

/** Initialize RTSP start-line */
static APR_INLINE void rtsp_start_line_init(rtsp_start_line_t *start_line, rtsp_message_type_e message_type)
{
    start_line->message_type = message_type;
    if(message_type == RTSP_MESSAGE_TYPE_REQUEST) {
        rtsp_request_line_init(&start_line->common.request_line);
    }
    else if(message_type == RTSP_MESSAGE_TYPE_RESPONSE) {
        rtsp_status_line_init(&start_line->common.status_line);
    }
}

/** Parse RTSP start-line */
RTSP_DECLARE(apt_bool_t) rtsp_start_line_parse(rtsp_start_line_t *start_line, apt_str_t *str, apr_pool_t *pool);

/** Generate RTSP start-line */
RTSP_DECLARE(apt_bool_t) rtsp_start_line_generate(rtsp_start_line_t *start_line, apt_text_stream_t *text_stream);

/** Get reason phrase by status code */
RTSP_DECLARE(const apt_str_t*) rtsp_reason_phrase_get(rtsp_reason_phrase_e reason);

APT_END_EXTERN_C

#endif /* RTSP_START_LINE_H */