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arduino_homekit_server.cpp
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arduino_homekit_server.cpp
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#include <Arduino.h>
#include <esp_xpgm.h>
#include <ESP8266WiFi.h>
#include <WiFiServer.h>
#include <WiFiClient.h>
#include <ESP8266mDNS.h>
#include <LEAmDNS.h>
#include <wolfssl/wolfcrypt/settings.h>
#include <homekit/homekit.h>
#include <homekit/characteristics.h>
#include <homekit/tlv.h>
#include <homekit/types.h>
#include <wolfssl/wolfcrypt/hash.h> //wc_sha512
#include "constants.h"
#include "base64.h"
#include "pairing.h"
#include "storage.h"
#include "query_params.h"
#include "json.h"
#include "homekit_debug.h"
#include "port.h"
#include "http_parser.h"
#include "query_params.h"
#include "cJSON.h"
#include "cQueue.h"
#include "crypto.h"
#include "watchdog.h"
#include "arduino_homekit_server.h"
#define HOMEKIT_SERVER_PORT 5556
#define HOMEKIT_MAX_CLIENTS 8
#define HOMEKIT_MDNS_SERVICE "hap"//"_hap"
#define HOMEKIT_MDNS_PROTO "tcp"//"_tcp"
#define HOMEKIT_EVENT_QUEUE_SIZE 4 //original is 20
#define HOMEKIT_SOCKET_TIMEOUT 500 //milliseconds
//#define TCP_DEFAULT_KEEPALIVE_IDLE_SEC 7200 // 2 hours
//#define TCP_DEFAULT_KEEPALIVE_INTERVAL_SEC 75 // 75 sec
//#define TCP_DEFAULT_KEEPALIVE_COUNT 9 // fault after 9 failures
//const int idle = 180; /* 180 sec idle before start sending probes */
#define HOMEKIT_SOCKET_KEEPALIVE_IDLE_SEC 180
//const int interval = 30; /* 30 sec between probes */
#define HOMEKIT_SOCKET_KEEPALIVE_INTERVAL_SEC 30
//const int maxpkt = 4; /* Drop connection after 4 probes without response */
#define HOMEKIT_SOCKET_KEEPALIVE_IDLE_COUNT 4
// if 180 + 30 * 4 = 300 sec without socket response, disconected it.
// WiFiClient can not write big buff once.
// TCP_SND_BUF = (2 * TCP_MSS) = 1072. See lwipopts.h
// max(encrypted_chunk) = 512 + 8(chunk_info) + 18(chacha_info). See client_send_encrypted
#define HOMEKIT_JSONBUFFER_SIZE 512
#ifdef HOMEKIT_DEBUG
#define TLV_DEBUG(values) //tlv_debug(values)
#else
#define TLV_DEBUG(values)
#endif
#define CLIENT_DEBUG(client, message, ...) DEBUG("[Client %d] " message, client->socket, ##__VA_ARGS__)
#define CLIENT_INFO(client, message, ...) INFO("[Client %d] " message, client->socket, ##__VA_ARGS__)
#define CLIENT_ERROR(client, message, ...) ERROR("[Client %d] " message, client->socket, ##__VA_ARGS__)
client_context_t *current_client_context = NULL;
homekit_server_t *running_server = nullptr;
WiFiEventHandler arduino_homekit_gotiphandler;
#define HOMEKIT_NOTIFY_EVENT(server, event) \
if ((server)->config->on_event) \
(server)->config->on_event(event);
void client_context_free(client_context_t *c);
void pairing_context_free(pairing_context_t *context);
void homekit_server_close_client(homekit_server_t *server, client_context_t *context);
bool arduino_homekit_preinit(homekit_server_t *server);
homekit_server_t* server_new() {
homekit_server_t *server = (homekit_server_t*) malloc(sizeof(homekit_server_t));
server->wifi_server = new WiFiServer(HOMEKIT_SERVER_PORT);
server->wifi_server->begin();
server->wifi_server->setNoDelay(true);
DEBUG("WiFiServer begin at port: %d", HOMEKIT_SERVER_PORT);
//FD_ZERO(&server->fds);
//server->max_fd = 0;
server->nfds = 0;
server->config = NULL;
server->paired = false;
server->pairing_context = NULL;
server->clients = NULL;
return server;
}
void server_free(homekit_server_t *server) {
if (server->pairing_context)
pairing_context_free(server->pairing_context);
if (server->clients) {
client_context_t *client = server->clients;
while (client) {
client_context_t *next = client->next;
client_context_free(client);
client = next;
}
}
if (server->wifi_server) {
server->wifi_server->stop();
server->wifi_server->close();
delete server->wifi_server;
server->wifi_server = nullptr;
}
DEBUG("homekit_server_t delete WiFiServer at port: %d\n", HOMEKIT_SERVER_PORT);
if (server == running_server) {
running_server = NULL;
}
free(server);
}
void tlv_debug(const tlv_values_t *values) {
DEBUG("Got following TLV values:");
for (tlv_t *t = values->head; t; t = t->next) {
char *escaped_payload = binary_to_string(t->value, t->size);
DEBUG("Type %d value (%d bytes): %s", t->type, t->size, escaped_payload);
free(escaped_payload);
}
}
pair_verify_context_t* pair_verify_context_new() {
pair_verify_context_t *context = (pair_verify_context_t*) malloc(sizeof(pair_verify_context_t));
context->secret = NULL;
context->secret_size = 0;
context->session_key = NULL;
context->session_key_size = 0;
context->device_public_key = NULL;
context->device_public_key_size = 0;
context->accessory_public_key = NULL;
context->accessory_public_key_size = 0;
return context;
}
void pair_verify_context_free(pair_verify_context_t *context) {
if (context->secret)
free(context->secret);
if (context->session_key)
free(context->session_key);
if (context->device_public_key)
free(context->device_public_key);
if (context->accessory_public_key)
free(context->accessory_public_key);
free(context);
}
//==========================
// client_context new and free
//============================
client_context_t* client_context_new(WiFiClient *wifiClient) {
client_context_t *c = (client_context_t*) malloc(sizeof(client_context_t));
c->server = NULL;
c->endpoint_params = NULL;
c->data_size = sizeof(c->data);
c->data_available = 0;
c->body = NULL;
c->body_length = 0;
http_parser_init(&c->parser, HTTP_REQUEST);
c->parser.data = c;
c->pairing_id = -1;
c->encrypted = false;
c->count_reads = 0;
c->count_writes = 0;
c->disconnect = false;
//c->event_queue = xQueueCreate(20, sizeof(characteristic_event_t*));
c->event_queue = (Queue_t*) malloc(sizeof(Queue_t));
q_init(c->event_queue, sizeof(characteristic_event_t*),
HOMEKIT_EVENT_QUEUE_SIZE, LIFO, true);
c->verify_context = NULL;
c->next = NULL;
c->socket = wifiClient;
c->step = HOMEKIT_CLIENT_STEP_NONE;
c->error_write = false;
return c;
}
void client_context_free(client_context_t *c) {
if (c->verify_context)
pair_verify_context_free(c->verify_context);
if (c->event_queue) {
//c->event_queue->clear();
q_clean(c->event_queue);
q_kill(c->event_queue);
free(c->event_queue);
}
if (c->endpoint_params)
query_params_free(c->endpoint_params);
if (c->body)
free(c->body);
if (c->socket) {
c->socket->stop();
delete c->socket;
c->socket = nullptr;
}
free(c);
}
pairing_context_t *saved_preinit_pairing_context = nullptr;
pairing_context_t* pairing_context_new() {
pairing_context_t *context = (pairing_context_t*) malloc(sizeof(pairing_context_t));
context->srp = crypto_srp_new();
context->client = NULL;
context->public_key = NULL;
context->public_key_size = 0;
return context;
}
void pairing_context_free(pairing_context_t *context) {
if (context == saved_preinit_pairing_context) {
INFO("Free saved_preinit_pairing_context");
if (saved_preinit_pairing_context) {
saved_preinit_pairing_context = nullptr;
}
}
if (context->srp) {
crypto_srp_free(context->srp);
}
if (context->public_key) {
free(context->public_key);
}
free(context);
}
//=====================
//pairing context
//=====================
void client_notify_characteristic(homekit_characteristic_t *ch, homekit_value_t value,
void *client);
void write_characteristic_json(json_stream *json, client_context_t *client,
const homekit_characteristic_t *ch, characteristic_format_t format,
const homekit_value_t *value) {
json_string(json, "aid");
json_uint32(json, ch->service->accessory->id);
json_string(json, "iid");
json_uint32(json, ch->id);
if (format & characteristic_format_type) {
json_string(json, "type");
json_string(json, ch->type);
}
if (format & characteristic_format_perms) {
json_string(json, "perms");
json_array_start(json);
if (ch->permissions & homekit_permissions_paired_read)
json_string(json, "pr");
if (ch->permissions & homekit_permissions_paired_write)
json_string(json, "pw");
if (ch->permissions & homekit_permissions_notify)
json_string(json, "ev");
if (ch->permissions & homekit_permissions_additional_authorization)
json_string(json, "aa");
if (ch->permissions & homekit_permissions_timed_write)
json_string(json, "tw");
if (ch->permissions & homekit_permissions_hidden)
json_string(json, "hd");
json_array_end(json);
}
if ((format & characteristic_format_events) && (ch->permissions & homekit_permissions_notify)) {
bool events = homekit_characteristic_has_notify_callback(ch, client_notify_characteristic,
client);
json_string(json, "ev");
json_boolean(json, events);
}
if (format & characteristic_format_meta) {
if (ch->description) {
json_string(json, "description");
json_string(json, ch->description);
}
const char *format_str = NULL;
switch (ch->format) {
case homekit_format_bool:
format_str = "bool";
break;
case homekit_format_uint8:
format_str = "uint8";
break;
case homekit_format_uint16:
format_str = "uint16";
break;
case homekit_format_uint32:
format_str = "uint32";
break;
case homekit_format_uint64:
format_str = "uint64";
break;
case homekit_format_int:
format_str = "int";
break;
case homekit_format_float:
format_str = "float";
break;
case homekit_format_string:
format_str = "string";
break;
case homekit_format_tlv:
format_str = "tlv8";
break;
case homekit_format_data:
format_str = "data";
break;
}
if (format_str) {
json_string(json, "format");
json_string(json, format_str);
}
const char *unit_str = NULL;
switch (ch->unit) {
case homekit_unit_none:
break;
case homekit_unit_celsius:
unit_str = "celsius";
break;
case homekit_unit_percentage:
unit_str = "percentage";
break;
case homekit_unit_arcdegrees:
unit_str = "arcdegrees";
break;
case homekit_unit_lux:
unit_str = "lux";
break;
case homekit_unit_seconds:
unit_str = "seconds";
break;
}
if (unit_str) {
json_string(json, "unit");
json_string(json, unit_str);
}
if (ch->min_value) {
json_string(json, "minValue");
json_float(json, *ch->min_value);
}
if (ch->max_value) {
json_string(json, "maxValue");
json_float(json, *ch->max_value);
}
if (ch->min_step) {
json_string(json, "minStep");
json_float(json, *ch->min_step);
}
if (ch->max_len) {
json_string(json, "maxLen");
json_uint32(json, *ch->max_len);
}
if (ch->max_data_len) {
json_string(json, "maxDataLen");
json_uint32(json, *ch->max_data_len);
}
if (ch->valid_values.count) {
json_string(json, "valid-values");
json_array_start(json);
for (int i = 0; i < ch->valid_values.count; i++) {
json_uint16(json, ch->valid_values.values[i]);
}
json_array_end(json);
}
if (ch->valid_values_ranges.count) {
json_string(json, "valid-values-range");
json_array_start(json);
for (int i = 0; i < ch->valid_values_ranges.count; i++) {
json_array_start(json);
json_integer(json, ch->valid_values_ranges.ranges[i].start);
json_integer(json, ch->valid_values_ranges.ranges[i].end);
json_array_end(json);
}
json_array_end(json);
}
}
if (ch->permissions & homekit_permissions_paired_read) {
homekit_value_t v = value ? *value : ch->getter_ex ? ch->getter_ex(ch) : ch->value;
if (v.is_null) {
json_string(json, "value"); json_null(json);
} else if (v.format != ch->format) {
ERROR("Characteristic value format is different from characteristic format");
} else {
switch (v.format) {
case homekit_format_bool: {
json_string(json, "value");
json_boolean(json, v.bool_value);
break;
}
case homekit_format_uint8: {
json_string(json, "value");
json_uint8(json, v.uint8_value);
break;
}
case homekit_format_uint16: {
json_string(json, "value");
json_uint16(json, v.uint16_value);
break;
}
case homekit_format_uint32: {
json_string(json, "value");
json_uint32(json, v.uint32_value);
break;
}
case homekit_format_uint64: {
json_string(json, "value");
json_uint64(json, v.uint64_value);
break;
}
case homekit_format_int: {
json_string(json, "value");
json_integer(json, v.int_value);
break;
}
case homekit_format_float: {
json_string(json, "value");
json_float(json, v.float_value);
break;
}
case homekit_format_string: {
json_string(json, "value");
json_string(json, v.string_value);
break;
}
case homekit_format_tlv: {
json_string(json, "value");
if (!v.tlv_values) {
json_string(json, "");
} else {
size_t tlv_size = 0;
tlv_format(v.tlv_values, NULL, &tlv_size);
if (tlv_size == 0) {
json_string(json, "");
} else {
byte *tlv_data = (byte*) malloc(tlv_size);
tlv_format(v.tlv_values, tlv_data, &tlv_size);
size_t encoded_tlv_size = base64_encoded_size(tlv_data, tlv_size);
byte *encoded_tlv_data = (byte*) malloc(encoded_tlv_size + 1);
base64_encode_(tlv_data, tlv_size, encoded_tlv_data);
encoded_tlv_data[encoded_tlv_size] = 0;
json_string(json, (char*) encoded_tlv_data);
free(encoded_tlv_data);
free(tlv_data);
}
}
break;
}
case homekit_format_data: {
json_string(json, "value");
if (!v.data_value || v.data_size == 0) {
json_string(json, "");
} else {
size_t encoded_data_size = base64_encoded_size(v.data_value, v.data_size);
byte *encoded_data = (byte*) malloc(encoded_data_size + 1);
base64_encode_(v.data_value, v.data_size, encoded_data);
encoded_data[encoded_data_size] = 0;
json_string(json, (char*) encoded_data);
free(encoded_data);
}
break;
}
}
}
if (!value && ch->getter_ex) {
// called getter to get value, need to free it
homekit_value_destruct(&v);
}
}
}
void write(client_context_t *context, byte *data, int data_size) {
if ((!context) || (!context->socket) || (!context->socket->connected())) {
CLIENT_ERROR(context, "The socket is null! (or is closed)");
return;
}
if (context->error_write) {
CLIENT_ERROR(context, "Abort write data since error_write.");
return;
}
int write_size = context->socket->write(data, data_size);
CLIENT_DEBUG(context, "Sending data of size %d", data_size);
if (write_size != data_size) {
CLIENT_ERROR(context, "socket.write, data_size=%d, write_size=%d", data_size, write_size);
context->error_write = true;
// Error write when :
// 1. remote client is disconnected
// 2. data_size is larger than the tcp internal send buffer
// But We has limited the data_size to 538, and TCP_SND_BUF = 1072. (See the comments on HOMEKIT_JSONBUFFER_SIZE)
// So we believe here is disconnected.
context->disconnect = true;
homekit_server_close_client(context->server, context);
// We consider the socket is 'closed' when error in writing (eg. the remote client is disconnected, NO tcp ack receive).
// Closing the socket causes memory-leak if some data has not been sent (the write_buffer did not free)
// To fix this memory-leak, add tcp_abandon(_pcb, 0); in ClientContext.h of ESP8266WiFi-library.
}
}
int client_send_encrypted_(client_context_t *context,
byte *payload, size_t size) {
CLIENT_DEBUG(context, "Send encrypted of size %d", size);
// max(size) = HOMEKIT_JSONBUFFER_SIZE + chunk_info(8) = 512 + 8 = 520
if (!context || !context->encrypted)
return -1;
/*
HAP doc:
Each HTTP message is split into frames no larger than 1024 bytes.
Each frame has the following format:
<2:AAD for little endian length of encrypted data (n) in bytes>
<n:encrypted data according to AEAD algorithm, up to 1024 bytes>
<16:authTag according to AEAD algorithm>
Note by Wang Bin. 2020-03-07
*/
byte nonce[12];
memset(nonce, 0, sizeof(nonce));
byte encrypted[1024 + 18];
int payload_offset = 0;
while (payload_offset < size) {
size_t chunk_size = size - payload_offset;
if (chunk_size > 1024)
chunk_size = 1024;
byte aead[2] = { chunk_size % 256, chunk_size / 256 };
memcpy(encrypted, aead, 2);
byte i = 4;
int x = context->count_reads++;
while (x) {
nonce[i++] = x % 256;
x /= 256;
}
size_t available = sizeof(encrypted) - 2;
int r = crypto_chacha20poly1305_encrypt(context->read_key, nonce, aead, 2,
payload + payload_offset, chunk_size, encrypted + 2, &available);
if (r) {
ERROR("Failed to chacha encrypt payload (code %d)", r);
return -1;
}
payload_offset += chunk_size;
write(context, encrypted, available + 2);
}
return 0;
}
int client_decrypt_(client_context_t *context,
byte *payload, size_t payload_size, byte *decrypted, size_t *decrypted_size) {
if (!context || !context->encrypted)
return -1;
const size_t block_size = 1024 + 16 + 2;
size_t required_decrypted_size = payload_size / block_size * 1024;
if (payload_size % block_size > 0)
required_decrypted_size += payload_size % block_size - 16 - 2;
if (*decrypted_size < required_decrypted_size) {
*decrypted_size = required_decrypted_size;
return -2;
}
*decrypted_size = required_decrypted_size;
byte nonce[12];
memset(nonce, 0, sizeof(nonce));
int payload_offset = 0;
int decrypted_offset = 0;
while (payload_offset < payload_size) {
size_t chunk_size = payload[payload_offset] + payload[payload_offset + 1] * 256;
if (chunk_size + 18 > payload_size - payload_offset) {
// Unfinished chunk
break;
}
byte i = 4;
int x = context->count_writes++;
while (x) {
nonce[i++] = x % 256;
x /= 256;
}
size_t decrypted_len = *decrypted_size - decrypted_offset;
int r = crypto_chacha20poly1305_decrypt(context->write_key, nonce, payload + payload_offset,
2, payload + payload_offset + 2, chunk_size + 16, decrypted, &decrypted_len);
if (r) {
ERROR("Failed to chacha decrypt payload (code %d)", r);
return -1;
}
decrypted_offset += decrypted_len;
payload_offset += chunk_size + 18;
}
return payload_offset;
}
void client_notify_characteristic(homekit_characteristic_t *ch, homekit_value_t value,
void *context) {
client_context_t *client = (client_context_t*) context;
if (client->current_characteristic == ch && client->current_value
&& homekit_value_equal(client->current_value, &value)) {
// This value is set by this client, no need to send notification
CLIENT_DEBUG(client, "This value is set by this client, no need to send notification");
return;
}
CLIENT_INFO(client, "Got characteristic %d.%d change event",
ch->service->accessory->id, ch->id);
//DEBUG("Got characteristic %d.%d change event", ch->service->accessory->id, ch->id);
if (!client->event_queue) {
ERROR("Client has no event queue. Skipping notification");
return;
}
characteristic_event_t *event = (characteristic_event_t*) malloc(
sizeof(characteristic_event_t));
event->characteristic = ch;
homekit_value_copy(&event->value, &value);
DEBUG("Sending event to client %d", client->socket);
//xQueueSendToBack(client->event_queue, &event, 10);*/
//q_push第二个参数要传指针地址
q_push(client->event_queue, &event);
}
void client_send(client_context_t *context, byte *data, size_t data_size) {
CLIENT_DEBUG(context, "send data size=%d, encrypted=%s",
data_size, context->encrypted ? "true" : "false");
if (context->encrypted) {
int r = client_send_encrypted_(context, data, data_size);
if (r) {
CLIENT_ERROR(context, "Failed to encrypt response (code %d)", r);
return;
}
} else {
write(context, data, data_size);
}
}
void client_send_P(client_context_t *context, PGM_P pgm) {
XPGM_BUFFCPY_STRING(char, buff, pgm);
client_send(context, (byte*)buff, sizeof(buff) - 1);
}
void client_send_chunk(byte *data, size_t size, void *arg) {
client_context_t *context = (client_context_t*) arg;
size_t payload_size = size + 8;
byte *payload = (byte*) malloc(payload_size);
if (!payload) {
ERROR("Error malloc payload!! payload_size->%d", payload_size);
return;
}
int offset = snprintf((char*) payload, payload_size, "%x\r\n", size);
memcpy(payload + offset, data, size);
payload[offset + size] = '\r';
payload[offset + size + 1] = '\n';
CLIENT_DEBUG(context, "client_send_chunk, size=%d, offset=%d", size, offset);
client_send(context, payload, offset + size + 2);
free(payload);
}
void send_204_response(client_context_t *context) {
static const char PROGMEM response[] = "HTTP/1.1 204 No Content\r\n\r\n";
client_send_P(context, response);
}
void send_404_response(client_context_t *context) {
static const char PROGMEM response[] = "HTTP/1.1 404 Not Found\r\n\r\n";
client_send_P(context, response);
}
void send_client_events(client_context_t *context, client_event_t *events) {
CLIENT_DEBUG(context, "Sending EVENT");DEBUG_HEAP();
static const char PROGMEM http_headers[] = "EVENT/1.0 200 OK\r\n"
"Content-Type: application/hap+json\r\n"
"Transfer-Encoding: chunked\r\n\r\n";
client_send_P(context, http_headers);
// ~35 bytes per event JSON
// 256 should be enough for ~7 characteristic updates
json_stream *json = json_new(HOMEKIT_JSONBUFFER_SIZE, client_send_chunk, context);
json_object_start(json);
json_string(json, "characteristics");
json_array_start(json);
client_event_t *e = events;
while (e) {
json_object_start(json);
write_characteristic_json(json, context, e->characteristic, (characteristic_format_t) 0,
&e->value);
json_object_end(json);
e = e->next;
}
json_array_end(json);
json_object_end(json);
json_flush(json);
json_free(json);
client_send_chunk(NULL, 0, context);
}
void send_tlv_response(client_context_t *context, tlv_values_t *values);
void send_tlv_error_response(client_context_t *context, int state, TLVError error) {
tlv_values_t *response = tlv_new();
tlv_add_integer_value(response, TLVType_State, 1, state);
tlv_add_integer_value(response, TLVType_Error, 1, error);
send_tlv_response(context, response);
}
void send_tlv_response(client_context_t *context, tlv_values_t *values) {
CLIENT_DEBUG(context, "Sending TLV response");TLV_DEBUG(values);
size_t payload_size = 0;
tlv_format(values, NULL, &payload_size);
byte *payload = (byte*) malloc(payload_size);
int r = tlv_format(values, payload, &payload_size);
if (r) {
CLIENT_ERROR(context, "Failed to format TLV payload (code %d)", r);
free(payload);
return;
}
tlv_free(values);
static const char PROGMEM http_headers_pgm[] = "HTTP/1.1 200 OK\r\n"
"Content-Type: application/pairing+tlv8\r\n"
"Content-Length: %d\r\n"
"Connection: keep-alive\r\n\r\n";
XPGM_BUFFCPY_STRING(char, http_headers, http_headers_pgm);
int response_size = strlen(http_headers) + payload_size + 32;
char *response = (char*) malloc(response_size);
int response_len = snprintf(response, response_size, http_headers, payload_size);
if (response_size - response_len < payload_size + 1) {
CLIENT_ERROR(context, "Incorrect response buffer size %d: headers took %d, payload size %d",
response_size, response_len, payload_size);
free(response);
free(payload);
return;
}
memcpy(response + response_len, payload, payload_size);
response_len += payload_size;
free(payload);
client_send(context, (byte*) response, response_len);
free(response);
}
static const char PROGMEM json_200_response_headers_progmem[] = "HTTP/1.1 200 OK\r\n"
"Content-Type: application/hap+json\r\n"
"Transfer-Encoding: chunked\r\n"
"Connection: keep-alive\r\n\r\n";
static const char PROGMEM json_207_response_headers_progmem[] = "HTTP/1.1 207 Multi-Status\r\n"
"Content-Type: application/hap+json\r\n"
"Transfer-Encoding: chunked\r\n"
"Connection: keep-alive\r\n\r\n";
void send_json_response(client_context_t *context, int status_code, byte *payload,
size_t payload_size) {
CLIENT_DEBUG(context, "Sending JSON response");DEBUG_HEAP();
static const char PROGMEM http_headers_pgm[] = "HTTP/1.1 %d %s\r\n"
"Content-Type: application/hap+json\r\n"
"Content-Length: %d\r\n"
"Connection: keep-alive\r\n\r\n";
XPGM_BUFFCPY_STRING(char, http_headers, http_headers_pgm);
CLIENT_DEBUG(context, "Payload: %s", payload);
// Using PSTR and strcpy_P. Ref: ESP.getResetReason
//const char *status_text = "OK";
char status_text[32];
strcpy_P(status_text, PSTR("OK"));
switch (status_code) {
case 204:
strcpy_P(status_text, PSTR("No Content"));
break;
case 207:
strcpy_P(status_text, PSTR("Multi-Status"));
break;
case 400:
strcpy_P(status_text, PSTR("Bad Request"));
break;
case 404:
strcpy_P(status_text, PSTR("Not Found"));
break;
case 422:
strcpy_P(status_text, PSTR("Unprocessable Entity"));
break;
case 500:
strcpy_P(status_text, PSTR("Internal Server Error"));
break;
case 503:
strcpy_P(status_text, PSTR("Service Unavailable"));
break;
}
int response_size = strlen(http_headers) + payload_size + strlen(status_text) + 32;
char *response = (char*) malloc(response_size);
if (!response) {
CLIENT_ERROR(context, "Failed to allocate response buffer of size %d", response_size);
return;
}
int response_len = snprintf(response, response_size, http_headers, status_code, status_text,
payload_size);
if (response_size - response_len < payload_size + 1) {
CLIENT_ERROR(context, "Incorrect response buffer size %d: headers took %d, payload size %d",
response_size, response_len, payload_size);
free(response);
return;
}
memcpy(response + response_len, payload, payload_size);
response_len += payload_size;
response[response_len] = 0; // required for debug output
CLIENT_DEBUG(context, "Sending HTTP response: %s", response);
client_send(context, (byte*) response, response_len);
free(response);
}
void send_json_error_response(client_context_t *context, int status_code, HAPStatus status) {
byte buffer[32];
int size = snprintf((char*) buffer, sizeof(buffer), "{\"status\": %d}", status);
send_json_response(context, status_code, buffer, size);
}
homekit_client_id_t homekit_get_client_id() {
return (homekit_client_id_t) current_client_context;
}
bool homekit_client_is_admin() {
if (!current_client_context)
return false;
return current_client_context->permissions & pairing_permissions_admin;
}
int homekit_client_send(unsigned char *data, size_t size) {
if (!current_client_context)
return -1;
client_send(current_client_context, data, size);
return 0;
}
void homekit_server_on_identify(client_context_t *context) {
CLIENT_INFO(context, "Identify");DEBUG_HEAP();
if (context->server->paired) {
// Already paired
send_json_error_response(context, 400, HAPStatus_InsufficientPrivileges);
return;
}
send_204_response(context);
homekit_accessory_t *accessory = homekit_accessory_by_id(context->server->config->accessories,
1);
if (!accessory) {
return;
}
homekit_service_t *accessory_info = homekit_service_by_type(accessory,
HOMEKIT_SERVICE_ACCESSORY_INFORMATION);
if (!accessory_info) {
return;
}
homekit_characteristic_t *ch_identify = homekit_service_characteristic_by_type(accessory_info,
HOMEKIT_CHARACTERISTIC_IDENTIFY);
if (!ch_identify) {
return;
}
if (ch_identify->setter_ex) {
ch_identify->setter_ex(ch_identify, HOMEKIT_BOOL_CPP(true));
}
}
void homekit_server_on_pair_setup(client_context_t *context, const byte *data, size_t size) {
DEBUG("Pair Setup");DEBUG_HEAP();
DEBUG_TIME_BEGIN();
#ifdef HOMEKIT_OVERCLOCK_PAIR_SETUP
homekit_overclock_start();
#endif
// First set step=NONE, if pair-setup ok then set step=1or2or3
// (if pair-step error, the step is NONE)
context->step = HOMEKIT_CLIENT_STEP_NONE;
tlv_values_t *message = tlv_new();
tlv_parse(data, size, message);
TLV_DEBUG(message);
switch (tlv_get_integer_value(message, TLVType_State, -1)) {
case 1: {
CLIENT_INFO(context, "Pair Setup Step 1/3");DEBUG_HEAP();
if (context->server->paired) {
CLIENT_INFO(context, "Refusing to pair: already paired");
send_tlv_error_response(context, 2, TLVError_Unavailable);
break;
}
if (context->server->pairing_context) {
if (context->server->pairing_context->client != context) {
CLIENT_INFO(context, "Refusing to pair: another pairing in progress");
send_tlv_error_response(context, 2, TLVError_Busy);
break;
}
} else {
// arduino homekit preinit (create pairing_context)
if (!arduino_homekit_preinit(context->server)) {
CLIENT_ERROR(context, "Init pairing context error");
send_tlv_error_response(context, 2, TLVError_Unknown);
break;
}
if (saved_preinit_pairing_context == nullptr) {
CLIENT_ERROR(context, "The saved_preinit_pairing_context is NULL ?!");
send_tlv_error_response(context, 2, TLVError_Unknown);
break;
}
context->server->pairing_context = saved_preinit_pairing_context; ///pairing_context_new();