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c8ce350226473576959ea1165cdc2ad03394372f
UxPlay/lib/raop_handlers.h
F. Duncanh c8ce350226 raop : whitespace cleanup
2025-08-08 12:52:59 -04:00

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/**
* Copyright (C) 2018 Juho Vähä-Herttua
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
*===================================================================
* modfied by fduncanh 2021-2023
*/
/* This file should be only included from raop.c as it defines static handler
* functions and depends on raop internals */
#include "dnssdint.h"
#include "utils.h"
#include <ctype.h>
#include <stdlib.h>
#include <plist/plist.h>
#define AUDIO_SAMPLE_RATE 44100 /* all supported AirPlay audio format use this sample rate */
#define SECOND_IN_USECS 1000000
#define SECOND_IN_NSECS 1000000000
#define MAX_PW_ATTEMPTS 3
typedef void (*raop_handler_t)(raop_conn_t *, http_request_t *,
http_response_t *, char **, int *);
static void
raop_handler_info(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
assert(conn->raop->dnssd);
#if 0
/* initial GET/info request sends plist with string "txtAirPlay" */
bool txtAirPlay = false;
const char* content_type = NULL;
content_type = http_request_get_header(request, "Content-Type");
if (content_type && strstr(content_type, "application/x-apple-binary-plist")) {
char *qualifier_string = NULL;
const char *data = NULL;
int data_len = 0;
data = http_request_get_data(request, &data_len);
//parsing bplist
plist_t req_root_node = NULL;
plist_from_bin(data, data_len, &req_root_node);
plist_t req_qualifier_node = plist_dict_get_item(req_root_node, "qualifier");
if (PLIST_IS_ARRAY(req_qualifier_node)) {
plist_t req_string_node = plist_array_get_item(req_qualifier_node, 0);
plist_get_string_val(req_string_node, &qualifier_string);
}
if (qualifier_string && !strcmp(qualifier_string, "txtAirPlay")) {
printf("qualifier: %s\n", qualifier_string);
txtAirPlay = true;
}
if (qualifier_string) {
free(qualifier_string);
}
}
#endif
plist_t res_node = plist_new_dict();
/* deviceID is the physical hardware address, and will not change */
int hw_addr_raw_len = 0;
const char *hw_addr_raw = dnssd_get_hw_addr(conn->raop->dnssd, &hw_addr_raw_len);
char *hw_addr = calloc(1, 3 * hw_addr_raw_len);
//int hw_addr_len =
utils_hwaddr_airplay(hw_addr, 3 * hw_addr_raw_len, hw_addr_raw, hw_addr_raw_len);
plist_t device_id_node = plist_new_string(hw_addr);
plist_dict_set_item(res_node, "deviceID", device_id_node);
/* Persistent Public Key */
int pk_len = 0;
char *pk = utils_parse_hex(conn->raop->pk_str, strlen(conn->raop->pk_str), &pk_len);
plist_t pk_node = plist_new_data(pk, pk_len);
plist_dict_set_item(res_node, "pk", pk_node);
/* airplay_txt is from the _airplay._tcp dnssd announuncement, may not be necessary */
int airplay_txt_len = 0;
const char *airplay_txt = dnssd_get_airplay_txt(conn->raop->dnssd, &airplay_txt_len);
plist_t txt_airplay_node = plist_new_data(airplay_txt, airplay_txt_len);
plist_dict_set_item(res_node, "txtAirPlay", txt_airplay_node);
uint64_t features = dnssd_get_airplay_features(conn->raop->dnssd);
plist_t features_node = plist_new_uint(features);
plist_dict_set_item(res_node, "features", features_node);
int name_len = 0;
const char *name = dnssd_get_name(conn->raop->dnssd, &name_len);
plist_t name_node = plist_new_string(name);
plist_dict_set_item(res_node, "name", name_node);
plist_t audio_latencies_node = plist_new_array();
plist_t audio_latencies_0_node = plist_new_dict();
plist_t audio_latencies_0_output_latency_micros_node = plist_new_bool(0);
plist_t audio_latencies_0_type_node = plist_new_uint(100);
plist_t audio_latencies_0_audio_type_node = plist_new_string("default");
plist_t audio_latencies_0_input_latency_micros_node = plist_new_uint(0);
plist_dict_set_item(audio_latencies_0_node, "type", audio_latencies_0_type_node);
plist_dict_set_item(audio_latencies_0_node, "inputLatencyMicros", audio_latencies_0_input_latency_micros_node);
plist_dict_set_item(audio_latencies_0_node, "audioType", audio_latencies_0_audio_type_node);
plist_dict_set_item(audio_latencies_0_node, "outputLatencyMicros", audio_latencies_0_output_latency_micros_node);
plist_array_append_item(audio_latencies_node, audio_latencies_0_node);
plist_t audio_latencies_1_node = plist_new_dict();
plist_t audio_latencies_1_output_latency_micros_node = plist_new_bool(0);
plist_t audio_latencies_1_type_node = plist_new_uint(101);
plist_t audio_latencies_1_audio_type_node = plist_new_string("default");
plist_t audio_latencies_1_input_latency_micros_node = plist_new_uint(0);
plist_dict_set_item(audio_latencies_1_node, "type", audio_latencies_1_type_node);
plist_dict_set_item(audio_latencies_1_node, "audioType", audio_latencies_1_audio_type_node);
plist_dict_set_item(audio_latencies_1_node, "inputLatencyMicros", audio_latencies_1_input_latency_micros_node);
plist_dict_set_item(audio_latencies_1_node, "outputLatencyMicros", audio_latencies_1_output_latency_micros_node);
plist_array_append_item(audio_latencies_node, audio_latencies_1_node);
plist_dict_set_item(res_node, "audioLatencies", audio_latencies_node);
plist_t audio_formats_node = plist_new_array();
plist_t audio_format_0_node = plist_new_dict();
plist_t audio_format_0_type_node = plist_new_uint(100);
plist_t audio_format_0_audio_input_formats_node = plist_new_uint(0x3fffffc);
plist_t audio_format_0_audio_output_formats_node = plist_new_uint(0x3fffffc);
plist_dict_set_item(audio_format_0_node, "audioOutputFormats", audio_format_0_audio_output_formats_node);
plist_dict_set_item(audio_format_0_node, "type", audio_format_0_type_node);
plist_dict_set_item(audio_format_0_node, "audioInputFormats", audio_format_0_audio_input_formats_node);
plist_array_append_item(audio_formats_node, audio_format_0_node);
plist_t audio_format_1_node = plist_new_dict();
plist_t audio_format_1_type_node = plist_new_uint(101);
plist_t audio_format_1_audio_input_formats_node = plist_new_uint(0x3fffffc);
plist_t audio_format_1_audio_output_formats_node = plist_new_uint(0x3fffffc);
plist_dict_set_item(audio_format_1_node, "audioOutputFormats", audio_format_1_audio_output_formats_node);
plist_dict_set_item(audio_format_1_node, "type", audio_format_1_type_node);
plist_dict_set_item(audio_format_1_node, "audioInputFormats", audio_format_1_audio_input_formats_node);
plist_array_append_item(audio_formats_node, audio_format_1_node);
plist_dict_set_item(res_node, "audioFormats", audio_formats_node);
plist_t pi_node = plist_new_string(AIRPLAY_PI);
plist_dict_set_item(res_node, "pi", pi_node);
plist_t vv_node = plist_new_uint(strtol(AIRPLAY_VV, NULL, 10));
plist_dict_set_item(res_node, "vv", vv_node);
plist_t status_flags_node = plist_new_uint(68);
plist_dict_set_item(res_node, "statusFlags", status_flags_node);
plist_t keep_alive_low_power_node = plist_new_uint(1);
plist_dict_set_item(res_node, "keepAliveLowPower", keep_alive_low_power_node);
plist_t source_version_node = plist_new_string(GLOBAL_VERSION);
plist_dict_set_item(res_node, "sourceVersion", source_version_node);
plist_t keep_alive_send_stats_as_body_node = plist_new_bool(1);
plist_dict_set_item(res_node, "keepAliveSendStatsAsBody", keep_alive_send_stats_as_body_node);
plist_t model_node = plist_new_string(GLOBAL_MODEL);
plist_dict_set_item(res_node, "model", model_node);
plist_t mac_address_node = plist_new_string(hw_addr);
plist_dict_set_item(res_node, "macAddress", mac_address_node);
plist_t displays_node = plist_new_array();
plist_t displays_0_node = plist_new_dict();
plist_t displays_0_width_physical_node = plist_new_uint(0);
plist_t displays_0_height_physical_node = plist_new_uint(0);
plist_t displays_0_uuid_node = plist_new_string("e0ff8a27-6738-3d56-8a16-cc53aacee925");
plist_t displays_0_width_node = plist_new_uint(conn->raop->width);
plist_t displays_0_height_node = plist_new_uint(conn->raop->height);
plist_t displays_0_width_pixels_node = plist_new_uint(conn->raop->width);
plist_t displays_0_height_pixels_node = plist_new_uint(conn->raop->height);
plist_t displays_0_rotation_node = plist_new_bool(0); /* set to true in AppleTV gen 3 (which has features bit 8 set */
plist_t displays_0_refresh_rate_node = plist_new_real((double) 1.0 / conn->raop->refreshRate); /* set as real 0.166666 = 60hz in AppleTV gen 3 */
plist_t displays_0_max_fps_node = plist_new_uint(conn->raop->maxFPS);
plist_t displays_0_overscanned_node = plist_new_bool(conn->raop->overscanned);
plist_t displays_0_features = plist_new_uint(14);
plist_dict_set_item(displays_0_node, "uuid", displays_0_uuid_node);
plist_dict_set_item(displays_0_node, "widthPhysical", displays_0_width_physical_node);
plist_dict_set_item(displays_0_node, "heightPhysical", displays_0_height_physical_node);
plist_dict_set_item(displays_0_node, "width", displays_0_width_node);
plist_dict_set_item(displays_0_node, "height", displays_0_height_node);
plist_dict_set_item(displays_0_node, "widthPixels", displays_0_width_pixels_node);
plist_dict_set_item(displays_0_node, "heightPixels", displays_0_height_pixels_node);
plist_dict_set_item(displays_0_node, "rotation", displays_0_rotation_node);
plist_dict_set_item(displays_0_node, "refreshRate", displays_0_refresh_rate_node);
plist_dict_set_item(displays_0_node, "maxFPS", displays_0_max_fps_node);
plist_dict_set_item(displays_0_node, "overscanned", displays_0_overscanned_node);
plist_dict_set_item(displays_0_node, "features", displays_0_features);
plist_array_append_item(displays_node, displays_0_node);
plist_dict_set_item(res_node, "displays", displays_node);
plist_to_bin(res_node, response_data, (uint32_t *) response_datalen);
plist_free(res_node);
http_response_add_header(response, "Content-Type", "application/x-apple-binary-plist");
free(pk);
free(hw_addr);
}
static void
raop_handler_pairpinstart(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen) {
logger_log(conn->raop->logger, LOGGER_INFO, "client sent PAIR-PIN-START request");
int pin_4;
if (conn->raop->pin > 9999) {
pin_4 = conn->raop->pin % 10000;
} else {
pin_4 = random_pin();
if (pin_4 < 0) {
logger_log(conn->raop->logger, LOGGER_ERR, "Failed to generate random pin");
} else {
conn->raop->pin = (unsigned short) pin_4 % 10000;
}
}
char pin[6];
snprintf(pin, 5, "%04u", pin_4);
if (conn->raop->callbacks.display_pin) {
conn->raop->callbacks.display_pin(conn->raop->callbacks.cls, pin);
}
logger_log(conn->raop->logger, LOGGER_INFO, "*** CLIENT MUST NOW ENTER PIN = \"%s\" AS AIRPLAY PASSWORD", pin);
*response_data = NULL;
response_datalen = 0;
}
static void
raop_handler_pairsetup_pin(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen) {
const char *request_data = NULL;;
int request_datalen = 0;
bool data_is_plist = false;
bool logger_debug = (logger_get_level(conn->raop->logger) >= LOGGER_DEBUG);
request_data = http_request_get_data(request, &request_datalen);
logger_log(conn->raop->logger, LOGGER_INFO, "client requested pair-setup-pin, datalen = %d", request_datalen);
if (request_datalen > 0) {
char *header_str= NULL;
http_request_get_header_string(request, &header_str);
logger_log(conn->raop->logger, LOGGER_INFO, "request header: %s", header_str);
data_is_plist = (strstr(header_str,"apple-binary-plist") != NULL);
free(header_str);
}
if (!data_is_plist) {
logger_log(conn->raop->logger, LOGGER_INFO, "did not receive expected plist from client, request_datalen = %d",
request_datalen);
goto authentication_failed;
}
/* process the pair-setup-pin request */
plist_t req_root_node = NULL;
plist_from_bin(request_data, request_datalen, &req_root_node);
plist_t req_method_node = plist_dict_get_item(req_root_node, "method");
plist_t req_user_node = plist_dict_get_item(req_root_node, "user");
plist_t req_pk_node = plist_dict_get_item(req_root_node, "pk");
plist_t req_proof_node = plist_dict_get_item(req_root_node, "proof");
plist_t req_epk_node = plist_dict_get_item(req_root_node, "epk");
plist_t req_authtag_node = plist_dict_get_item(req_root_node, "authTag");
if (PLIST_IS_STRING(req_method_node) && PLIST_IS_STRING(req_user_node)) {
/* this is the initial pair-setup-pin request */
const char *salt;
char pin[6];
const char *pk;
int len_pk, len_salt;
char *method = NULL;
char *user = NULL;
plist_get_string_val(req_method_node, &method);
if (strncmp(method, "pin", strlen (method))) {
logger_log(conn->raop->logger, LOGGER_ERR, "error, required method is \"pin\", client requested \"%s\"", method);
*response_data = NULL;
response_datalen = 0;
free (method);
plist_free (req_root_node);
return;
}
free (method);
plist_get_string_val(req_user_node, &user);
logger_log(conn->raop->logger, LOGGER_INFO, "pair-setup-pin: device_id = %s", user);
snprintf(pin, 6, "%04u", conn->raop->pin % 10000);
if (conn->raop->pin < 10000) {
conn->raop->pin = 0;
}
int ret = srp_new_user(conn->session, conn->raop->pairing, (const char *) user,
(const char *) pin, &salt, &len_salt, &pk, &len_pk);
free(user);
plist_free(req_root_node);
if (ret < 0) {
logger_log(conn->raop->logger, LOGGER_ERR, "failed to create user, err = %d", ret);
goto authentication_failed;
}
plist_t res_root_node = plist_new_dict();
plist_t res_salt_node = plist_new_data(salt, len_salt);
plist_t res_pk_node = plist_new_data(pk, len_pk);
plist_dict_set_item(res_root_node, "pk", res_pk_node);
plist_dict_set_item(res_root_node, "salt", res_salt_node);
plist_to_bin(res_root_node, response_data, (uint32_t*) response_datalen);
plist_free(res_root_node);
http_response_add_header(response, "Content-Type", "application/x-apple-binary-plist");
return;
} else if (PLIST_IS_DATA(req_pk_node) && PLIST_IS_DATA(req_proof_node)) {
/* this is the second part of pair-setup-pin request */
char *client_pk = NULL;
char *client_proof = NULL;
unsigned char proof[64];
memset(proof, 0, sizeof(proof));
uint64_t client_pk_len;
uint64_t client_proof_len;
plist_get_data_val(req_pk_node, &client_pk, &client_pk_len);
plist_get_data_val(req_proof_node, &client_proof, &client_proof_len);
if (logger_debug) {
char *str = utils_data_to_string((const unsigned char *) client_proof, client_proof_len, 20);
logger_log(conn->raop->logger, LOGGER_DEBUG, "client SRP6a proof <M> :\n%s", str);
free (str);
}
memcpy(proof, client_proof, (int) client_proof_len);
free (client_proof);
int ret = srp_validate_proof(conn->session, conn->raop->pairing, (const unsigned char *) client_pk,
(int) client_pk_len, proof, (int) client_proof_len, (int) sizeof(proof));
free (client_pk);
plist_free(req_root_node);
if (ret < 0) {
logger_log(conn->raop->logger, LOGGER_ERR, "Client Authentication Failure (client proof not validated)");
goto authentication_failed;
}
if (logger_debug) {
char *str = utils_data_to_string((const unsigned char *) proof, sizeof(proof), 20);
logger_log(conn->raop->logger, LOGGER_DEBUG, "server SRP6a proof <M1> :\n%s", str);
free (str);
}
plist_t res_root_node = plist_new_dict();
plist_t res_proof_node = plist_new_data((const char *) proof, 20);
plist_dict_set_item(res_root_node, "proof", res_proof_node);
plist_to_bin(res_root_node, response_data, (uint32_t*) response_datalen);
plist_free(res_root_node);
http_response_add_header(response, "Content-Type", "application/x-apple-binary-plist");
return;
} else if (PLIST_IS_DATA(req_epk_node) && PLIST_IS_DATA(req_authtag_node)) {
/* this is the third part of pair-setup-pin request */
char *client_epk = NULL;
char *client_authtag = NULL;
uint64_t client_epk_len;
uint64_t client_authtag_len;
unsigned char epk[ED25519_KEY_SIZE];
unsigned char authtag[GCM_AUTHTAG_SIZE];
int ret;
plist_get_data_val(req_epk_node, &client_epk, &client_epk_len);
plist_get_data_val(req_authtag_node, &client_authtag, &client_authtag_len);
if (logger_debug) {
char *str = utils_data_to_string((const unsigned char *) client_epk, client_epk_len, 16);
logger_log(conn->raop->logger, LOGGER_DEBUG, "client_epk %d:\n%s\n", (int) client_epk_len, str);
str = utils_data_to_string((const unsigned char *) client_authtag, client_authtag_len, 16);
logger_log(conn->raop->logger, LOGGER_DEBUG, "client_authtag %d:\n%s\n", (int) client_authtag_len, str);
free (str);
}
memcpy(epk, client_epk, ED25519_KEY_SIZE);
memcpy(authtag, client_authtag, GCM_AUTHTAG_SIZE);
free (client_authtag);
free (client_epk);
plist_free(req_root_node);
ret = srp_confirm_pair_setup(conn->session, conn->raop->pairing, epk, authtag);
if (ret < 0) {
logger_log(conn->raop->logger, LOGGER_ERR, "pair-pin-setup (step 3): client authentication failed\n");
goto authentication_failed;
} else {
logger_log(conn->raop->logger, LOGGER_DEBUG, "pair-pin-setup success\n");
}
pairing_session_set_setup_status(conn->session);
plist_t res_root_node = plist_new_dict();
plist_t res_epk_node = plist_new_data((const char *) epk, 32);
plist_t res_authtag_node = plist_new_data((const char *) authtag, 16);
plist_dict_set_item(res_root_node, "epk", res_epk_node);
plist_dict_set_item(res_root_node, "authTag", res_authtag_node);
plist_to_bin(res_root_node, response_data, (uint32_t*) response_datalen);
plist_free(res_root_node);
http_response_add_header(response, "Content-Type", "application/x-apple-binary-plist");
return;
}
authentication_failed:;
http_response_init(response, "RTSP/1.0", 470, "Client Authentication Failure");
}
static void
raop_handler_pairsetup(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
unsigned char public_key[ED25519_KEY_SIZE];
//const char *data;
int datalen;
//data =
http_request_get_data(request, &datalen);
if (datalen != 32) {
logger_log(conn->raop->logger, LOGGER_ERR, "Invalid pair-setup data");
return;
}
pairing_get_public_key(conn->raop->pairing, public_key);
pairing_session_set_setup_status(conn->session);
*response_data = malloc(sizeof(public_key));
if (*response_data) {
http_response_add_header(response, "Content-Type", "application/octet-stream");
memcpy(*response_data, public_key, sizeof(public_key));
*response_datalen = sizeof(public_key);
}
}
static void
raop_handler_pairverify(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
bool register_check = false;
if (pairing_session_check_handshake_status(conn->session)) {
if (conn->raop->use_pin) {
pairing_session_set_setup_status(conn->session);
register_check = true;
} else {
return;
}
}
unsigned char public_key[X25519_KEY_SIZE];
unsigned char signature[PAIRING_SIG_SIZE];
const unsigned char *data;
int datalen;
data = (unsigned char *) http_request_get_data(request, &datalen);
if (datalen < 4) {
logger_log(conn->raop->logger, LOGGER_ERR, "Invalid pair-verify data");
return;
}
switch (data[0]) {
case 1:
if (datalen != 4 + X25519_KEY_SIZE + ED25519_KEY_SIZE) {
logger_log(conn->raop->logger, LOGGER_ERR, "Invalid pair-verify data");
return;
}
/* We can fall through these errors, the result will just be garbage... */
if (pairing_session_handshake(conn->session, data + 4, data + 4 + X25519_KEY_SIZE)) {
logger_log(conn->raop->logger, LOGGER_ERR, "Error initializing pair-verify handshake");
}
if (pairing_session_get_public_key(conn->session, public_key)) {
logger_log(conn->raop->logger, LOGGER_ERR, "Error getting ECDH public key");
}
if (pairing_session_get_signature(conn->session, signature)) {
logger_log(conn->raop->logger, LOGGER_ERR, "Error getting ED25519 signature");
}
if (register_check) {
bool registered_client = true;
if (conn->raop->callbacks.check_register) {
const unsigned char *pk = data + 4 + X25519_KEY_SIZE;
char *pk64;
ed25519_pk_to_base64(pk, &pk64);
registered_client = conn->raop->callbacks.check_register(conn->raop->callbacks.cls, pk64);
free (pk64);
}
if (!registered_client) {
return;
}
}
*response_data = malloc(sizeof(public_key) + sizeof(signature));
if (*response_data) {
http_response_add_header(response, "Content-Type", "application/octet-stream");
memcpy(*response_data, public_key, sizeof(public_key));
memcpy(*response_data + sizeof(public_key), signature, sizeof(signature));
*response_datalen = sizeof(public_key) + sizeof(signature);
}
break;
case 0:
logger_log(conn->raop->logger, LOGGER_DEBUG, "2nd pair-verify step: checking signature");
if (datalen != 4 + PAIRING_SIG_SIZE) {
logger_log(conn->raop->logger, LOGGER_ERR, "Invalid pair-verify data");
return;
}
if (pairing_session_finish(conn->session, data + 4)) {
logger_log(conn->raop->logger, LOGGER_ERR, "Incorrect pair-verify signature");
http_response_set_disconnect(response, 1);
return;
}
logger_log(conn->raop->logger, LOGGER_DEBUG, "pair-verify: signature is verified");
http_response_add_header(response, "Content-Type", "application/octet-stream");
break;
}
}
static void
raop_handler_fpsetup(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
const unsigned char *data;
int datalen;
data = (unsigned char *) http_request_get_data(request, &datalen);
if (datalen == 16) {
*response_data = malloc(142);
if (*response_data) {
http_response_add_header(response, "Content-Type", "application/octet-stream");
if (!fairplay_setup(conn->fairplay, data, (unsigned char *) *response_data)) {
*response_datalen = 142;
} else {
// Handle error?
free(*response_data);
*response_data = NULL;
}
}
} else if (datalen == 164) {
*response_data = malloc(32);
if (*response_data) {
http_response_add_header(response, "Content-Type", "application/octet-stream");
if (!fairplay_handshake(conn->fairplay, data, (unsigned char *) *response_data)) {
*response_datalen = 32;
} else {
// Handle error?
free(*response_data);
*response_data = NULL;
}
}
} else {
logger_log(conn->raop->logger, LOGGER_ERR, "Invalid fp-setup data length");
return;
}
}
static void
raop_handler_options(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
http_response_add_header(response, "Public", "SETUP, RECORD, FLUSH, TEARDOWN, OPTIONS, GET_PARAMETER, SET_PARAMETER");
}
static void
raop_handler_setup(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
const char *dacp_id = NULL;
const char *active_remote_header = NULL;
bool logger_debug = (logger_get_level(conn->raop->logger) >= LOGGER_DEBUG);
const char *data = NULL;
int data_len = 0;
data = http_request_get_data(request, &data_len);
dacp_id = http_request_get_header(request, "DACP-ID");
active_remote_header = http_request_get_header(request, "Active-Remote");
if (dacp_id && active_remote_header) {
logger_log(conn->raop->logger, LOGGER_DEBUG, "DACP-ID: %s", dacp_id);
logger_log(conn->raop->logger, LOGGER_DEBUG, "Active-Remote: %s", active_remote_header);
if (conn->raop_rtp) {
raop_rtp_remote_control_id(conn->raop_rtp, dacp_id, active_remote_header);
}
}
// Parsing bplist
plist_t req_root_node = NULL;
plist_from_bin(data, data_len, &req_root_node);
plist_t req_ekey_node = plist_dict_get_item(req_root_node, "ekey");
plist_t req_eiv_node = plist_dict_get_item(req_root_node, "eiv");
// For the response
plist_t res_root_node = plist_new_dict();
if (PLIST_IS_DATA(req_eiv_node) && PLIST_IS_DATA(req_ekey_node)) {
// The first SETUP call that initializes keys and timing
unsigned char aesiv[16] = { 0 };
unsigned char aeskey[16] = { 0 };
unsigned char eaeskey[72] = { 0 };
logger_log(conn->raop->logger, LOGGER_DEBUG, "SETUP 1");
// First setup
char *deviceID = NULL;
plist_t req_deviceid_node = plist_dict_get_item(req_root_node, "deviceID");
plist_get_string_val(req_deviceid_node, &deviceID);
/* RFC2617 Digest authentication (md5 hash) of uxplay client-access password, if set */
if (!conn->authenticated && conn->raop->callbacks.passwd) {
size_t pin_len = 4;
const char *authorization = NULL;
authorization = http_request_get_header(request, "Authorization");
if (!authorization) {
// if random_pw is set, but client has changed, unset it
if (conn->raop->random_pw && strncmp(conn->raop->random_pw + pin_len + 1, deviceID, 17)) {
free(conn->raop->random_pw);
conn->raop->random_pw = NULL;
}
}
int len;
const char *password = conn->raop->callbacks.passwd(conn->raop->callbacks.cls, &len);
// len = -1 means use a random password for this connection; len = 0 means no password
if (len == -1 && conn->raop->random_pw && conn->raop->auth_fail_count >= MAX_PW_ATTEMPTS) {
// change random_pw after MAX_PW_ATTEMPTS failed authentication attempts
logger_log(conn->raop->logger, LOGGER_INFO, "Too many authentication failures: generate new random password");
free(conn->raop->random_pw);
conn->raop->random_pw = NULL;
}
if (len == -1 && !conn->raop->random_pw) {
// get and store 4 random digits
int pin_4 = random_pin();
if (pin_4 < 0) {
logger_log(conn->raop->logger, LOGGER_ERR, "Failed to generate random pin");
pin_4 = 1234;
}
conn->raop->random_pw = (char *) malloc(pin_len + 1 + 18);
char *pin = conn->raop->random_pw;
snprintf(pin, pin_len + 1, "%04u", pin_4 % 10000);
pin[pin_len] = '\0';
snprintf(pin + pin_len + 1, 18, "%s", deviceID);
conn->raop->auth_fail_count = 0;
}
if (len == -1 && !authorization && conn->raop->random_pw) {
if (conn->raop->callbacks.display_pin) {
conn->raop->callbacks.display_pin(conn->raop->callbacks.cls, conn->raop->random_pw);
}
logger_log(conn->raop->logger, LOGGER_INFO, "*** CLIENT MUST NOW ENTER PIN = \"%s\" AS AIRPLAY PASSWORD", conn->raop->random_pw);
conn->raop->auth_fail_count++;
}
if (len && !conn->authenticated) {
if (len == -1) {
password = (const char *) conn->raop->random_pw;
}
char nonce_string[33] = { '\0' };
//bool stale = false; //not implemented
if (len && authorization) {
char *ptr = strstr(authorization, "nonce=\"") + strlen("nonce=\"");
strncpy(nonce_string, ptr, 32);
const char *method = http_request_get_method(request);
conn->authenticated = pairing_digest_verify(method, authorization, password);
if (!conn->authenticated) {
// if random_pw is used, the auth_fail_count will be the number of times it is displayed after creation
if (len != -1) {
conn->raop->auth_fail_count++;
}
logger_log(conn->raop->logger, LOGGER_INFO, "*** authentication failure: count = %u", conn->raop->auth_fail_count);
}
if (conn->authenticated) {
//printf("initial authenticatication OK\n");
conn->authenticated = conn->authenticated && !strcmp(nonce_string, conn->raop->nonce);
if (!conn->authenticated) {
logger_log(conn->raop->logger, LOGGER_INFO, "authentication rejected (nonce mismatch) %s %s",
nonce_string, conn->raop->nonce);
}
}
if (conn->authenticated && conn->raop->random_pw) {
free (conn->raop->random_pw);
conn->raop->random_pw = NULL;
}
if (conn->raop->nonce) {
free(conn->raop->nonce);
conn->raop->nonce = NULL;
}
logger_log(conn->raop->logger, LOGGER_INFO, "Client authentication %s", (conn->authenticated ? "success" : "failure"));
}
if (!conn->authenticated) {
/* create a nonce */
const char *url = http_request_get_url(request);
unsigned char nonce[16] = { '\0' };
int len = 16;
uint64_t now = raop_ntp_get_local_time();
assert (!pairing_session_make_nonce(conn->session, &now, url, nonce, len));
if (conn->raop->nonce) {
free(conn->raop->nonce);
}
conn->raop->nonce = utils_hex_to_string(nonce, len);
char response_text[80] = "Digest realm=\"raop\", nonce=\"";
strncat(response_text, conn->raop->nonce, 80 - strlen(response_text) - 1);
strncat(response_text, "\"", 80 - strlen(response_text) - 1);
http_response_init(response, "RTSP/1.0", 401, "Unauthorized");
http_response_add_header(response, "WWW-Authenticate", response_text);
return;
}
}
}
char* eiv = NULL;
uint64_t eiv_len = 0;
char *model = NULL;
char *name = NULL;
bool admit_client = true;
plist_t req_model_node = plist_dict_get_item(req_root_node, "model");
plist_get_string_val(req_model_node, &model);
plist_t req_name_node = plist_dict_get_item(req_root_node, "name");
plist_get_string_val(req_name_node, &name);
if (conn->raop->callbacks.report_client_request) {
conn->raop->callbacks.report_client_request(conn->raop->callbacks.cls, deviceID, model, name, &admit_client);
}
if (admit_client && deviceID && name && conn->raop->callbacks.register_client) {
char *client_device_id = NULL;
char *client_pk = NULL; /* encoded as null-terminated base64 string, must be freed*/
get_pairing_session_client_data(conn->session, &client_device_id, &client_pk);
if (client_pk && !strcmp(deviceID, client_device_id)) {
conn->raop->callbacks.register_client(conn->raop->callbacks.cls, client_device_id, client_pk, name);
free (client_pk);
}
}
if (deviceID) {
free (deviceID);
deviceID = NULL;
}
if (model) {
free (model);
model = NULL;
}
if (name) {
free (name);
name = NULL;
}
if (admit_client == false) {
/* client is not authorized to connect */
plist_free(res_root_node);
plist_free(req_root_node);
return;
}
plist_get_data_val(req_eiv_node, &eiv, &eiv_len);
memcpy(aesiv, eiv, 16);
free(eiv);
logger_log(conn->raop->logger, LOGGER_DEBUG, "eiv_len = %llu", eiv_len);
if (logger_debug) {
char* str = utils_data_to_string(aesiv, 16, 16);
logger_log(conn->raop->logger, LOGGER_DEBUG, "16 byte aesiv (needed for AES-CBC audio decryption iv):\n%s", str);
free(str);
}
char* ekey = NULL;
uint64_t ekey_len = 0;
plist_get_data_val(req_ekey_node, &ekey, &ekey_len);
memcpy(eaeskey,ekey,72);
free(ekey);
logger_log(conn->raop->logger, LOGGER_DEBUG, "ekey_len = %llu", ekey_len);
// eaeskey is 72 bytes, aeskey is 16 bytes
if (logger_debug) {
char *str = utils_data_to_string((unsigned char *) eaeskey, ekey_len, 16);
logger_log(conn->raop->logger, LOGGER_DEBUG, "ekey:\n%s", str);
free (str);
}
int ret = fairplay_decrypt(conn->fairplay, (unsigned char*) eaeskey, aeskey);
logger_log(conn->raop->logger, LOGGER_DEBUG, "fairplay_decrypt ret = %d", ret);
if (logger_debug) {
char *str = utils_data_to_string(aeskey, 16, 16);
logger_log(conn->raop->logger, LOGGER_DEBUG, "16 byte aeskey (fairplay-decrypted from ekey):\n%s", str);
free(str);
}
const char *user_agent = http_request_get_header(request, "User-Agent");
logger_log(conn->raop->logger, LOGGER_INFO, "Client identified as User-Agent: %s", user_agent);
bool old_protocol = false;
#ifdef OLD_PROTOCOL_CLIENT_USER_AGENT_LIST /* set in global.h */
if (strstr(OLD_PROTOCOL_CLIENT_USER_AGENT_LIST, user_agent)) old_protocol = true;
#endif
if (old_protocol) { /* some windows AirPlay-client emulators use old AirPlay 1 protocol with unhashed AES key */
logger_log(conn->raop->logger, LOGGER_INFO, "Client identifed as using old protocol (unhashed) AES audio key)");
} else {
unsigned char ecdh_secret[X25519_KEY_SIZE];
if (pairing_get_ecdh_secret_key(conn->session, ecdh_secret)) {
/* In this case (legacy) pairing with client was successfully set up and created the shared ecdh_secret:
* aeskey must now be hashed with it
*
* If byte 27 of features ("supports legacy pairing") is turned off, the client does not request pairsetup
* and does NOT set up pairing (this eliminates a 5 second delay in connecting with no apparent bad effects).
* In this case, ecdh_secret does not exist, so aeskey should NOT be hashed with it.
* UxPlay may be able to function with byte 27 turned off because it currently does not support connections
* with more than one client at a time. AppleTV supports up to 12 clients, uses pairing to give each a distinct
* SessionID and ecdh_secret.
* The "old protocol" Windows AirPlay client AirMyPC seems not to respect the byte 27 setting, and always sets
* up the ecdh_secret, but decryption fails if aeskey is hashed.*/
if (logger_debug) {
char *str = utils_data_to_string(ecdh_secret, X25519_KEY_SIZE, 16);
logger_log(conn->raop->logger, LOGGER_DEBUG, "32 byte shared ecdh_secret:\n%s", str);
free(str);
}
memcpy(eaeskey, aeskey, 16);
sha_ctx_t *ctx = sha_init();
sha_update(ctx, eaeskey, 16);
sha_update(ctx, ecdh_secret, 32);
sha_final(ctx, eaeskey, NULL);
sha_destroy(ctx);
memcpy(aeskey, eaeskey, 16);
if (logger_debug) {
char *str = utils_data_to_string(aeskey, 16, 16);
logger_log(conn->raop->logger, LOGGER_DEBUG, "16 byte aeskey after sha-256 hash with ecdh_secret:\n%s", str);
free(str);
}
}
}
// Time port
plist_t req_is_remote_control_only_node = plist_dict_get_item(req_root_node, "isRemoteControlOnly");
if (req_is_remote_control_only_node) {
uint8_t bool_val = 0;
plist_get_bool_val(req_is_remote_control_only_node, &bool_val);
if (bool_val) {
logger_log(conn->raop->logger, LOGGER_ERR, "Client specified AirPlay2 \"Remote Control\" protocol\n"
" Only AirPlay v1 protocol (using NTP and timing port) is supported");
}
}
char *timing_protocol = NULL;
timing_protocol_t time_protocol = TP_NONE;
plist_t req_timing_protocol_node = plist_dict_get_item(req_root_node, "timingProtocol");
plist_get_string_val(req_timing_protocol_node, &timing_protocol);
if (timing_protocol) {
int string_len = strlen(timing_protocol);
if (strncmp(timing_protocol, "NTP", string_len) == 0) {
time_protocol = NTP;
} else if (strncmp(timing_protocol, "None", string_len) == 0) {
time_protocol = TP_NONE;
} else {
time_protocol = TP_OTHER;
}
if (time_protocol != NTP) {
logger_log(conn->raop->logger, LOGGER_ERR, "Client specified timingProtocol=%s,"
" but timingProtocol= NTP is required here", timing_protocol);
}
free (timing_protocol);
timing_protocol = NULL;
} else {
logger_log(conn->raop->logger, LOGGER_DEBUG, "Client did not specify timingProtocol,"
" old protocol without offset will be used");
time_protocol = TP_UNSPECIFIED;
}
uint64_t timing_rport = 0;
plist_t req_timing_port_node = plist_dict_get_item(req_root_node, "timingPort");
if (req_timing_port_node) {
plist_get_uint_val(req_timing_port_node, &timing_rport);
}
if (timing_rport) {
logger_log(conn->raop->logger, LOGGER_DEBUG, "timing_rport = %llu", timing_rport);
} else {
logger_log(conn->raop->logger, LOGGER_ERR, "Client did not supply timing_rport,"
" may be using unsupported AirPlay2 \"Remote Control\" protocol");
}
unsigned short timing_lport = conn->raop->timing_lport;
conn->raop_ntp = NULL;
conn->raop_rtp = NULL;
conn->raop_rtp_mirror = NULL;
char remote[40] = { 0 };
int len = utils_ipaddress_to_string(conn->remotelen, conn->remote, conn->zone_id, remote, (int) sizeof(remote));
if (!len || len > sizeof(remote)) {
char *str = utils_data_to_string(conn->remote, conn->remotelen, 16);
logger_log(conn->raop->logger, LOGGER_ERR, "failed to extract valid client ip address:\n"
"*** UxPlay will be unable to send communications to client.\n"
"*** address length %d, zone_id %u address data:\n%sparser returned \"%s\"\n",
conn->remotelen, conn->zone_id, str, remote);
free(str);
}
conn->raop_ntp = raop_ntp_init(conn->raop->logger, &conn->raop->callbacks, remote,
conn->remotelen, (unsigned short) timing_rport, &time_protocol);
raop_ntp_start(conn->raop_ntp, &timing_lport);
conn->raop_rtp = raop_rtp_init(conn->raop->logger, &conn->raop->callbacks, conn->raop_ntp,
remote, conn->remotelen, aeskey, aesiv);
conn->raop_rtp_mirror = raop_rtp_mirror_init(conn->raop->logger, &conn->raop->callbacks,
conn->raop_ntp, remote, conn->remotelen, aeskey);
/* the event port is not used in mirror mode or audio mode */
unsigned short event_port = 0;
plist_t res_event_port_node = plist_new_uint(event_port);
plist_t res_timing_port_node = plist_new_uint(timing_lport);
plist_dict_set_item(res_root_node, "timingPort", res_timing_port_node);
plist_dict_set_item(res_root_node, "eventPort", res_event_port_node);
logger_log(conn->raop->logger, LOGGER_DEBUG, "eport = %d, tport = %d", event_port, timing_lport);
}
// Process stream setup requests
plist_t req_streams_node = plist_dict_get_item(req_root_node, "streams");
if (PLIST_IS_ARRAY(req_streams_node)) {
plist_t res_streams_node = plist_new_array();
int count = plist_array_get_size(req_streams_node);
for (int i = 0; i < count; i++) {
plist_t req_stream_node = plist_array_get_item(req_streams_node, i);
plist_t req_stream_type_node = plist_dict_get_item(req_stream_node, "type");
uint64_t type;
plist_get_uint_val(req_stream_type_node, &type);
logger_log(conn->raop->logger, LOGGER_DEBUG, "type = %llu", type);
switch (type) {
case 110: {
// Mirroring
unsigned short dport = conn->raop->mirror_data_lport;
plist_t stream_id_node = plist_dict_get_item(req_stream_node, "streamConnectionID");
uint64_t stream_connection_id = 0;
plist_get_uint_val(stream_id_node, &stream_connection_id);
logger_log(conn->raop->logger, LOGGER_DEBUG, "streamConnectionID (needed for AES-CTR video decryption"
" key and iv): %llu", stream_connection_id);
if (conn->raop_rtp_mirror) {
raop_rtp_mirror_init_aes(conn->raop_rtp_mirror, &stream_connection_id);
raop_rtp_mirror_start(conn->raop_rtp_mirror, &dport, conn->raop->clientFPSdata);
logger_log(conn->raop->logger, LOGGER_DEBUG, "Mirroring initialized successfully");
} else {
logger_log(conn->raop->logger, LOGGER_ERR, "Mirroring not initialized at SETUP, playing will fail!");
http_response_set_disconnect(response, 1);
}
plist_t res_stream_node = plist_new_dict();
plist_t res_stream_data_port_node = plist_new_uint(dport);
plist_t res_stream_type_node = plist_new_uint(110);
plist_dict_set_item(res_stream_node, "dataPort", res_stream_data_port_node);
plist_dict_set_item(res_stream_node, "type", res_stream_type_node);
plist_array_append_item(res_streams_node, res_stream_node);
break;
}
case 96: {
// Audio
unsigned short cport = conn->raop->control_lport, dport = conn->raop->data_lport;
unsigned short remote_cport = 0;
unsigned char ct = 0;
unsigned int sr = AUDIO_SAMPLE_RATE; /* all AirPlay audio formats supported so far have sample rate 44.1kHz */
uint64_t uint_val = 0;
plist_t req_stream_control_port_node = plist_dict_get_item(req_stream_node, "controlPort");
plist_get_uint_val(req_stream_control_port_node, &uint_val);
remote_cport = (unsigned short) uint_val; /* must != 0 to activate audio resend requests */
plist_t req_stream_ct_node = plist_dict_get_item(req_stream_node, "ct");
plist_get_uint_val(req_stream_ct_node, &uint_val);
ct = (unsigned char) uint_val;
if (conn->raop->callbacks.audio_get_format) {
/* get additional audio format parameters */
uint64_t audioFormat = 0;
unsigned short spf = 0;
bool isMedia = false;
bool usingScreen = false;
uint8_t bool_val = 0;
plist_t req_stream_spf_node = plist_dict_get_item(req_stream_node, "spf");
plist_get_uint_val(req_stream_spf_node, &uint_val);
spf = (unsigned short) uint_val;
plist_t req_stream_audio_format_node = plist_dict_get_item(req_stream_node, "audioFormat");
plist_get_uint_val(req_stream_audio_format_node, &audioFormat);
plist_t req_stream_is_media_node = plist_dict_get_item(req_stream_node, "isMedia");
if (req_stream_is_media_node) {
plist_get_bool_val(req_stream_is_media_node, &bool_val);
isMedia = (bool) bool_val;
} else {
isMedia = false;
}
plist_t req_stream_using_screen_node = plist_dict_get_item(req_stream_node, "usingScreen");
if (req_stream_using_screen_node) {
plist_get_bool_val(req_stream_using_screen_node, &bool_val);
usingScreen = (bool) bool_val;
} else {
usingScreen = false;
}
conn->raop->callbacks.audio_get_format(conn->raop->callbacks.cls, &ct, &spf, &usingScreen, &isMedia, &audioFormat);
}
if (conn->raop_rtp) {
raop_rtp_start_audio(conn->raop_rtp, &remote_cport, &cport, &dport, &ct, &sr);
logger_log(conn->raop->logger, LOGGER_DEBUG, "RAOP initialized success");
} else {
logger_log(conn->raop->logger, LOGGER_ERR, "RAOP not initialized at SETUP, playing will fail!");
http_response_set_disconnect(response, 1);
}
plist_t res_stream_node = plist_new_dict();
plist_t res_stream_data_port_node = plist_new_uint(dport);
plist_t res_stream_control_port_node = plist_new_uint(cport);
plist_t res_stream_type_node = plist_new_uint(96);
plist_dict_set_item(res_stream_node, "dataPort", res_stream_data_port_node);
plist_dict_set_item(res_stream_node, "controlPort", res_stream_control_port_node);
plist_dict_set_item(res_stream_node, "type", res_stream_type_node);
plist_array_append_item(res_streams_node, res_stream_node);
break;
}
default:
logger_log(conn->raop->logger, LOGGER_ERR, "SETUP tries to setup stream of unknown type %llu", type);
http_response_set_disconnect(response, 1);
break;
}
}
plist_dict_set_item(res_root_node, "streams", res_streams_node);
}
plist_to_bin(res_root_node, response_data, (uint32_t*) response_datalen);
plist_free(res_root_node);
plist_free(req_root_node);
http_response_add_header(response, "Content-Type", "application/x-apple-binary-plist");
}
static void
raop_handler_get_parameter(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
const char *content_type;
const char *data;
int datalen;
content_type = http_request_get_header(request, "Content-Type");
if (!content_type) {
http_response_init(response, "RTSP/1.0", 451, "Parameter not understood");
return;
}
data = http_request_get_data(request, &datalen);
if (!strcmp(content_type, "text/parameters")) {
const char *current = data;
while (current && (datalen - (current - data) > 0)) {
const char *next;
/* This is a bit ugly, but seems to be how airport works too */
if ((datalen - (current - data) >= 8) && !strncmp(current, "volume\r\n", 8)) {
char volume[25] = "volume: 0.0\r\n";
if (conn->raop->callbacks.audio_set_client_volume) {
snprintf(volume, 25, "volume: %9.6f\r\n", conn->raop->callbacks.audio_set_client_volume(conn->raop->callbacks.cls));
}
http_response_add_header(response, "Content-Type", "text/parameters");
*response_data = strdup(volume);
if (*response_data) {
*response_datalen = strlen(*response_data);
}
return;
}
for (next = current ; (datalen - (next - data) > 0) ; ++next) {
if (*next == '\r') {
break;
}
}
if ((datalen - (next - data) >= 2) && !strncmp(next, "\r\n", 2)) {
if ((next - current) > 0) {
logger_log(conn->raop->logger, LOGGER_WARNING,
"Found an unknown parameter: %.*s", (next - current), current);
}
current = next + 2;
} else {
current = NULL;
}
}
}
}
static void
raop_handler_set_parameter(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
const char *content_type;
const char *data;
int datalen;
content_type = http_request_get_header(request, "Content-Type");
if (!content_type) {
http_response_init(response, "RTSP/1.0", 451, "Parameter not understood");
return;
}
data = http_request_get_data(request, &datalen);
if (!strcmp(content_type, "text/parameters")) {
char *datastr;
datastr = calloc(1, datalen+1);
if (data && datastr && conn->raop_rtp) {
memcpy(datastr, data, datalen);
if ((datalen >= 8) && !strncmp(datastr, "volume: ", 8)) {
float vol = 0.0;
sscanf(datastr+8, "%f", &vol);
raop_rtp_set_volume(conn->raop_rtp, vol);
} else if ((datalen >= 10) && !strncmp(datastr, "progress: ", 10)) {
unsigned int start, curr, end;
sscanf(datastr+10, "%u/%u/%u", &start, &curr, &end);
raop_rtp_set_progress(conn->raop_rtp, start, curr, end);
}
} else if (!conn->raop_rtp) {
logger_log(conn->raop->logger, LOGGER_WARNING, "RAOP not initialized at SET_PARAMETER");
}
free(datastr);
} else if (!strcmp(content_type, "image/jpeg") || !strcmp(content_type, "image/png")) {
logger_log(conn->raop->logger, LOGGER_DEBUG, "Got image data of %d bytes", datalen);
if (conn->raop_rtp) {
raop_rtp_set_coverart(conn->raop_rtp, data, datalen);
} else {
logger_log(conn->raop->logger, LOGGER_WARNING, "RAOP not initialized at SET_PARAMETER coverart");
}
} else if (!strcmp(content_type, "application/x-dmap-tagged")) {
logger_log(conn->raop->logger, LOGGER_DEBUG, "Got metadata of %d bytes", datalen);
if (conn->raop_rtp) {
raop_rtp_set_metadata(conn->raop_rtp, data, datalen);
} else {
logger_log(conn->raop->logger, LOGGER_WARNING, "RAOP not initialized at SET_PARAMETER metadata");
}
}
}
static void
raop_handler_feedback(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
logger_log(conn->raop->logger, LOGGER_DEBUG, "raop_handler_feedback");
/* register receipt of client's "heartbeat" signal */
conn->raop->callbacks.conn_feedback(conn->raop->callbacks.cls);
}
static void
raop_handler_record(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
char audio_latency[12];
unsigned int ad = (unsigned int) (((uint64_t) conn->raop->audio_delay_micros) * AUDIO_SAMPLE_RATE / SECOND_IN_USECS);
snprintf(audio_latency, sizeof(audio_latency), "%u", ad);
logger_log(conn->raop->logger, LOGGER_DEBUG, "raop_handler_record");
http_response_add_header(response, "Audio-Latency", audio_latency);
http_response_add_header(response, "Audio-Jack-Status", "connected; type=analog");
}
static void
raop_handler_flush(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
const char *rtpinfo;
int next_seq = -1;
rtpinfo = http_request_get_header(request, "RTP-Info");
if (rtpinfo) {
logger_log(conn->raop->logger, LOGGER_DEBUG, "Flush with RTP-Info: %s", rtpinfo);
if (!strncmp(rtpinfo, "seq=", 4)) {
next_seq = strtol(rtpinfo + 4, NULL, 10);
}
}
if (conn->raop_rtp) {
raop_rtp_flush(conn->raop_rtp, next_seq);
} else {
logger_log(conn->raop->logger, LOGGER_WARNING, "RAOP not initialized at FLUSH");
}
}
static void
raop_handler_teardown(raop_conn_t *conn,
http_request_t *request, http_response_t *response,
char **response_data, int *response_datalen)
{
/* get the teardown request type(s): (type 96, 110, or none) */
const char *data;
int data_len;
bool teardown_96 = false, teardown_110 = false;
data = http_request_get_data(request, &data_len);
plist_t req_root_node = NULL;
plist_from_bin(data, data_len, &req_root_node);
char * plist_xml;
uint32_t plist_len;
plist_to_xml(req_root_node, &plist_xml, &plist_len);
logger_log(conn->raop->logger, LOGGER_DEBUG, "%s", plist_xml);
free(plist_xml);
plist_t req_streams_node = plist_dict_get_item(req_root_node, "streams");
/* Process stream teardown requests */
if (PLIST_IS_ARRAY(req_streams_node)) {
uint64_t val;
int count = plist_array_get_size(req_streams_node);
for (int i = 0; i < count; i++) {
plist_t req_stream_node = plist_array_get_item(req_streams_node,i);
plist_t req_stream_type_node = plist_dict_get_item(req_stream_node, "type");
plist_get_uint_val(req_stream_type_node, &val);
if (val == 96) {
teardown_96 = true;
} else if (val == 110) {
teardown_110 = true;
}
}
}
plist_free(req_root_node);
if (conn->raop->callbacks.conn_teardown) {
conn->raop->callbacks.conn_teardown(conn->raop->callbacks.cls, &teardown_96, &teardown_110);
}
logger_log(conn->raop->logger, LOGGER_DEBUG, "TEARDOWN request, 96=%d, 110=%d", teardown_96, teardown_110);
http_response_add_header(response, "Connection", "close");
if (teardown_96) {
if (conn->raop_rtp) {
/* Stop our audio RTP session */
raop_rtp_stop(conn->raop_rtp);
/* stop any coverart rendering */
if (conn->raop->callbacks.audio_stop_coverart_rendering) {
conn->raop->callbacks.audio_stop_coverart_rendering(conn->raop->callbacks.cls);
}
}
} else if (teardown_110) {
conn->raop->callbacks.video_reset(conn->raop->callbacks.cls);
if (conn->raop_rtp_mirror) {
/* Stop our video RTP session */
raop_rtp_mirror_stop(conn->raop_rtp_mirror);
}
} else {
/* Destroy our sessions */
if (conn->raop_rtp) {
raop_rtp_destroy(conn->raop_rtp);
conn->raop_rtp = NULL;
}
if (conn->raop_rtp_mirror) {
raop_rtp_mirror_destroy(conn->raop_rtp_mirror);
conn->raop_rtp_mirror = NULL;
}
/* shut down any HLS connections */
httpd_remove_connections_by_type(conn->raop->httpd, CONNECTION_TYPE_HLS);
}
}
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