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rtsp: add rtsp bus
WifiDisplay uses RTSP for stream-setups. This adds a basic rtsp-bus implementations that we can use for sinks and sources. Note that the implementation is optimized for usability, not speed. RTSP is used for control-data, not streaming-data so there's no need to over-optimize it. In case inlined RTP is used, we still provide proper speed, even though that's usually not used by WifiDisplay implementations (due to the TCP requirement). Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
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David Herrmann
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0d5b431367
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5 changed files with 4224 additions and 0 deletions
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src/shared/rtsp.c
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src/shared/rtsp.c
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src/shared/rtsp.h
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src/shared/rtsp.h
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/*
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* MiracleCast - Wifi-Display/Miracast Implementation
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*
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* Copyright (c) 2013-2014 David Herrmann <dh.herrmann@gmail.com>
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*
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* MiracleCast is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* MiracleCast is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with MiracleCast; If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MIRACLE_RTSP_H
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#define MIRACLE_RTSP_H
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <systemd/sd-event.h>
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/* types */
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struct rtsp;
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struct rtsp_message;
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#define RTSP_ANY_CODE (~0U)
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#define RTSP_ANY_CHANNEL (~0U)
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enum {
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RTSP_MESSAGE_UNKNOWN,
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RTSP_MESSAGE_REQUEST,
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RTSP_MESSAGE_REPLY,
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RTSP_MESSAGE_DATA,
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RTSP_MESSAGE_CNT,
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};
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#define RTSP_TYPE_STRING 's'
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#define RTSP_TYPE_INT32 'i'
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#define RTSP_TYPE_UINT32 'u'
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#define RTSP_TYPE_RAW '&'
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#define RTSP_TYPE_HEADER_START '<'
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#define RTSP_TYPE_HEADER_END '>'
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#define RTSP_TYPE_BODY_START '{'
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#define RTSP_TYPE_BODY_END '}'
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enum {
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RTSP_CODE_CONTINUE = 100,
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RTSP_CODE_OK = 200,
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RTSP_CODE_CREATED,
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RTSP_CODE_LOW_ON_STORAGE_SPACE = 250,
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RTSP_CODE_MULTIPLE_CHOICES = 300,
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RTSP_CODE_MOVED_PERMANENTLY,
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RTSP_CODE_MOVED_TEMPORARILY,
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RTSP_CODE_SEE_OTHER,
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RTSP_CODE_NOT_MODIFIED,
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RTSP_CODE_USE_PROXY,
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RTSP_CODE_BAD_REQUEST = 400,
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RTSP_CODE_UNAUTHORIZED,
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RTSP_CODE_PAYMENT_REQUIRED,
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RTSP_CODE_FORBIDDEN,
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RTSP_CODE_NOT_FOUND,
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RTSP_CODE_METHOD_NOT_ALLOWED,
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RTSP_CODE_NOT_ACCEPTABLE,
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RTSP_CODE_PROXY_AUTHENTICATION_REQUIRED,
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RTSP_CODE_REQUEST_TIMEOUT,
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RTSP_CODE__PLACEHOLDER__1,
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RTSP_CODE_GONE,
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RTSP_CODE_LENGTH_REQUIRED,
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RTSP_CODE_PRECONDITION_FAILED,
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RTSP_CODE_REQUEST_ENTITY_TOO_LARGE,
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RTSP_CODE_REQUEST_URI_TOO_LARGE,
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RTSP_CODE_UNSUPPORTED_MEDIA_TYPE,
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RTSP_CODE_PARAMETER_NOT_UNDERSTOOD = 451,
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RTSP_CODE_CONFERENCE_NOT_FOUND,
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RTSP_CODE_NOT_ENOUGH_BANDWIDTH,
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RTSP_CODE_SESSION_NOT_FOUND,
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RTSP_CODE_METHOD_NOT_VALID_IN_THIS_STATE,
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RTSP_CODE_HEADER_FIELD_NOT_VALID_FOR_RESOURCE,
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RTSP_CODE_INVALID_RANGE,
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RTSP_CODE_PARAMETER_IS_READ_ONLY,
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RTSP_CODE_AGGREGATE_OPERATION_NOT_ALLOWED,
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RTSP_CODE_ONLY_AGGREGATE_OPERATION_ALLOWED,
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RTSP_CODE_UNSUPPORTED_TRANSPORT,
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RTSP_CODE_DESTINATION_UNREACHABLE,
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RTSP_CODE_INTERNAL_SERVER_ERROR = 500,
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RTSP_CODE_NOT_IMPLEMENTED,
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RTSP_CODE_BAD_GATEWAY,
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RTSP_CODE_SERVICE_UNAVAILABLE,
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RTSP_CODE_GATEWAY_TIMEOUT,
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RTSP_CODE_RTSP_VERSION_NOT_SUPPORTED,
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RTSP_CODE_OPTION_NOT_SUPPORTED = 551,
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RTSP_CODE_CNT
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};
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typedef int (*rtsp_callback_fn) (struct rtsp *bus,
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struct rtsp_message *m,
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void *data);
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/*
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* Bus
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*/
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int rtsp_open(struct rtsp **out, int fd);
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void rtsp_ref(struct rtsp *bus);
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void rtsp_unref(struct rtsp *bus);
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static inline void rtsp_unref_p(struct rtsp **bus)
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{
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rtsp_unref(*bus);
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}
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#define _rtsp_unref_ __attribute__((__cleanup__(rtsp_unref_p)))
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bool rtsp_is_dead(struct rtsp *bus);
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int rtsp_attach_event(struct rtsp *bus, sd_event *event, int priority);
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void rtsp_detach_event(struct rtsp *bus);
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int rtsp_add_match(struct rtsp *bus, rtsp_callback_fn cb_fn, void *data);
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void rtsp_remove_match(struct rtsp *bus, rtsp_callback_fn cb_fn, void *data);
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int rtsp_send(struct rtsp *bus, struct rtsp_message *m);
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int rtsp_call_async(struct rtsp *bus,
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struct rtsp_message *m,
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rtsp_callback_fn cb_fn,
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void *data,
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uint64_t timeout,
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uint64_t *cookie);
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void rtsp_call_async_cancel(struct rtsp *bus, uint64_t cookie);
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/*
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* Messages
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*/
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int rtsp_message_new_request(struct rtsp *bus,
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struct rtsp_message **out,
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const char *method,
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const char *uri);
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int rtsp_message_new_reply(struct rtsp *bus,
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struct rtsp_message **out,
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uint64_t cookie,
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unsigned int code,
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const char *phrase);
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int rtsp_message_new_reply_for(struct rtsp_message *orig,
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struct rtsp_message **out,
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unsigned int code,
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const char *phrase);
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int rtsp_message_new_data(struct rtsp *bus,
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struct rtsp_message **out,
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unsigned int channel,
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const void *payload,
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size_t size);
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int rtsp_message_new_from_raw(struct rtsp *bus,
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struct rtsp_message **out,
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const void *data,
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size_t len);
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void rtsp_message_ref(struct rtsp_message *m);
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void rtsp_message_unref(struct rtsp_message *m);
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static inline void rtsp_message_unref_p(struct rtsp_message **m)
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{
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rtsp_message_unref(*m);
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}
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#define _rtsp_message_unref_ __attribute__((__cleanup__(rtsp_message_unref_p)))
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bool rtsp_message_is_request(struct rtsp_message *m,
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const char *method,
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const char *uri);
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bool rtsp_message_is_reply(struct rtsp_message *m,
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unsigned int code,
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const char *phrase);
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bool rtsp_message_is_data(struct rtsp_message *m,
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unsigned int channel);
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/* message attributes */
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unsigned int rtsp_message_get_type(struct rtsp_message *m);
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const char *rtsp_message_get_method(struct rtsp_message *m);
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const char *rtsp_message_get_uri(struct rtsp_message *m);
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unsigned int rtsp_message_get_code(struct rtsp_message *m);
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const char *rtsp_message_get_phrase(struct rtsp_message *m);
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unsigned int rtsp_message_get_channel(struct rtsp_message *m);
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const void *rtsp_message_get_payload(struct rtsp_message *m);
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size_t rtsp_message_get_payload_size(struct rtsp_message *m);
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struct rtsp *rtsp_message_get_bus(struct rtsp_message *m);
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uint64_t rtsp_message_get_cookie(struct rtsp_message *m);
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bool rtsp_message_is_sealed(struct rtsp_message *m);
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/* appending arguments */
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int rtsp_message_append_line(struct rtsp_message *m, const char *line);
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int rtsp_message_open_header(struct rtsp_message *m, const char *name);
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int rtsp_message_close_header(struct rtsp_message *m);
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int rtsp_message_open_body(struct rtsp_message *m);
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int rtsp_message_close_body(struct rtsp_message *m);
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int rtsp_message_append_basic(struct rtsp_message *m,
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char type,
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...);
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int rtsp_message_appendv_basic(struct rtsp_message *m,
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char type,
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va_list args);
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int rtsp_message_append(struct rtsp_message *m,
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const char *types,
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...);
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int rtsp_message_appendv(struct rtsp_message *m,
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const char *types,
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va_list args);
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int rtsp_message_set_cookie(struct rtsp_message *m, uint64_t cookie);
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int rtsp_message_seal(struct rtsp_message *m);
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/* parsing arguments */
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int rtsp_message_enter_header(struct rtsp_message *m, const char *name);
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void rtsp_message_exit_header(struct rtsp_message *m);
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int rtsp_message_enter_body(struct rtsp_message *m);
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void rtsp_message_exit_body(struct rtsp_message *m);
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int rtsp_message_read_basic(struct rtsp_message *m,
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char type,
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...);
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int rtsp_message_readv_basic(struct rtsp_message *m,
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char type,
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va_list args);
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int rtsp_message_read(struct rtsp_message *m,
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const char *types,
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...);
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int rtsp_message_readv(struct rtsp_message *m,
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const char *types,
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va_list args);
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int rtsp_message_skip_basic(struct rtsp_message *m, char type);
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int rtsp_message_skip(struct rtsp_message *m, const char *types);
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int rtsp_message_rewind(struct rtsp_message *m, bool complete);
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void *rtsp_message_get_body(struct rtsp_message *m);
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size_t rtsp_message_get_body_size(struct rtsp_message *m);
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void *rtsp_message_get_raw(struct rtsp_message *m);
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size_t rtsp_message_get_raw_size(struct rtsp_message *m);
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#endif /* MIRACLE_RTSP_H */
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