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arduino_homekit_server.cpp
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arduino_homekit_server.cpp
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#include "port_x.h"
#ifdef ARDUINO8266_SERVER_CPP
#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <WiFiServer.h>
#include <WiFiClient.h>
#include <ESP8266mDNS.h>
#include <LEAmDNS.h>
#include "user_interface.h"
//#include <wolfssl/wolfcrypt/settings.h>
#include <homekit.h>
#include <characteristics.h>
#include <tlv.h>
#include <types.h>
//#include <wolfssl/wolfcrypt/hash.h> //wc_sha512
//#include <wolfssl.h>
#include <wolfssl/wolfcrypt/hash.h>
#include <wolfssl/wolfcrypt/coding.h>
//#include "constants.h"
#include "esphap_base64.h"
#include "pairing.h"
#include "storage.h"
#include "query_params.h"
#include "esphap_cJSON.h"
#include "cJSON_memory.h"
#include "json.h"
#include "esphap_debug.h"
#include "port.h"
#include "http_parser.h"
#include "query_params.h"
#include "cQueue.h"
#include "crypto.h"
#include "watchdog.h"
#include "arduino_homekit_server.h"
#define HOMEKIT_SERVER_PORT 5556
#define HOMEKIT_ARDUINO_SERVER_PORT HOMEKIT_SERVER_PORT
#define HOMEKIT_MAX_CLIENTS 8
#define CLIENT_CONTEXT_CACHE_SIZE 8
#define HOMEKIT_MDNS_SERVICE "hap"//"_hap"
#define HOMEKIT_MDNS_PROTO "tcp"//"_tcp"
#define HOMEKIT_EVENT_QUEUE_SIZE 4 //original is 20
//See WiFiClient.h WIFICLIENT_MAX_FLUSH_WAIT_MS
#define HOMEKIT_SOCKET_FLUSH_WAIT_MS 500 //milliseconds
#define DISCONNECT_ALIVE_DELAY_S 4
#define WIFI_CLIENT_SYNC true
#define WIFI_CLIENT_NODELAY true //in theory not neccessary to set false when sync true
//#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 120
//const int interval = 30; /* 30 sec between probes */
#define HOMEKIT_SOCKET_KEEPALIVE_INTERVAL_SEC 20
//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.
#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;
WiFiEventHandler arduino_homekit_gotiphandler;
#define HOMEKIT_NOTIFY_EVENT(server, event) \
if ((server)->config->on_event) \
(server)->config->on_event(event);
extern "C" {
typedef struct {
WiFiServer *wifi_server;
char* accessory_id;
ed25519_key* accessory_key;
homekit_server_config_t *config;
byte data[1024 + 18];
byte output_buffer[1024];
#ifdef PAIRVERIFY_USE_MEMORYBUFFER
byte data_verify[1024];
#endif
bool paired;
pairing_context_t *pairing_context;
http_parser parser;
json_stream json;
//int listen_fd;
//fd_set fds;
//int max_fd;
int nfds;// arduino homekit uses this to record client count
bool request_completed;
client_context_t *clients;
} homekit_server_t;
struct _client_context_t {
homekit_server_t *server;
//int socket;
WiFiClient *socket; //new and delete
homekit_endpoint_t endpoint;
query_param_t *endpoint_params;
char *body;
size_t body_length;
//http_parser parser;
int pairing_id;
byte permissions;
bool disconnect;
homekit_characteristic_t *current_characteristic;
homekit_value_t *current_value;
bool encrypted;
byte read_key[32];
byte write_key[32];
int count_reads;
int count_writes;
bool is_wrong_endpoint = false;
//QueueHandle_t event_queue;
Queue_t *event_queue;
pair_verify_context_t *verify_context;
homekit_client_step_t step; // WangBin added
bool error_write; // WangBin added
bool is_static;
bool is_used;
long disconnect_ms;
struct _client_context_t *next;
};
}
void client_context_free(client_context_t *c);
void pairing_context_free(pairing_context_t *context);
void client_send_chunk(byte *data, size_t size, void *arg);
void homekit_server_close_client(homekit_server_t *server, client_context_t *context);
void homekit_mdns_init(homekit_server_t *server);
void homekit_init_client_context(client_context_t *c, WiFiClient *wifiClient);
homekit_server_t *running_server = nullptr;
bool arduino_homekit_preinit(homekit_server_t *server);
static client_context_t cache_client_contexts[CLIENT_CONTEXT_CACHE_SIZE];
static bool is_initialized = false;
static bool mdns_announce=false;
#ifdef USE_STATIC_HTTP_BODY
byte static_http_body[512];
#endif
homekit_value_t HOMEKIT_DEFAULT_CPP() {
homekit_value_t homekit_value;
//homekit_value.is_null = false;//该值为默认，不用设置
return homekit_value;
}
homekit_value_t HOMEKIT_NULL_CPP() {
homekit_value_t homekit_value;
homekit_value.is_null = true;
return homekit_value;
}
homekit_value_t HOMEKIT_BOOL_CPP(bool value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_bool;
homekit_value.bool_value = value;
return homekit_value;
};
homekit_value_t HOMEKIT_INT_CPP(uint8_t value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_int;
homekit_value.int_value = value;
return homekit_value;
}
homekit_value_t HOMEKIT_UINT8_CPP(uint8_t value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_uint8;
homekit_value.int_value = value;
return homekit_value;
}
homekit_value_t HOMEKIT_UINT16_CPP(uint16_t value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_uint16;
homekit_value.int_value = value;
return homekit_value;
}
homekit_value_t HOMEKIT_UINT32_CPP(uint32_t value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_uint32;
homekit_value.int_value = value;
return homekit_value;
}
homekit_value_t HOMEKIT_UINT64_CPP(uint64_t value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_uint64;
homekit_value.int_value = value;
return homekit_value;
}
homekit_value_t HOMEKIT_FLOAT_CPP(float value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_float;
homekit_value.float_value = value;
return homekit_value;
}
homekit_value_t HOMEKIT_STRING_CPP(char *value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_string;
homekit_value.string_value = value;
return homekit_value;
}
homekit_value_t HOMEKIT_TLV_CPP(tlv_values_t *value) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_tlv;
homekit_value.tlv_values = value;
return homekit_value;
}
homekit_value_t HOMEKIT_DATA_CPP(uint8_t *value, size_t size) {
homekit_value_t homekit_value = HOMEKIT_DEFAULT_CPP();
homekit_value.format = homekit_format_data;
//homekit_value.data_value = value;
//homekit_value.data_size = size;
return homekit_value;
}
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();
#ifdef WIFI_CLIENT_NODELAY
server->wifi_server->setNoDelay(WIFI_CLIENT_NODELAY);
#else
server->wifi_server->setNoDelay(true);
#endif
#ifdef WIFI_CLIENT_SYNC
WiFiClient::setDefaultSync(WIFI_CLIENT_SYNC);
#endif
#ifdef WIFI_CLIENT_NODELAY
WiFiClient::setDefaultNoDelay(WIFI_CLIENT_NODELAY);
#endif
http_parser_init(&server->parser, HTTP_REQUEST);
json_init(&server->json, server->output_buffer, sizeof(server->output_buffer),
client_send_chunk, NULL);
DEBUG("WiFiServer begin at port: %d\n", HOMEKIT_ARDUINO_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;
server->accessory_id = NULL;
server->accessory_key = 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->accessory_id)
free(server->accessory_id);
if (server->accessory_key)
crypto_ed25519_free(server->accessory_key);
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_ARDUINO_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);
context->secret = NULL;
if (context->session_key)
free(context->session_key);
context->session_key = NULL;
if (context->device_public_key)
free(context->device_public_key);
context->device_public_key = NULL;
if (context->accessory_public_key)
free(context->accessory_public_key);
context->accessory_public_key = NULL;
free(context);
}
//==========================
// client_context new and free and handling
//============================
void server_static_init() {
if (is_initialized)
return;
for (int i = 0; i < CLIENT_CONTEXT_CACHE_SIZE; i++) {
client_context_t*c = &(cache_client_contexts[i]);
homekit_init_client_context(c,NULL);
c->is_static = true;
c->is_used = false;
}
is_initialized = true;
}
void homekit_init_client_context(client_context_t *c, WiFiClient *wifiClient) {
c->server = NULL;
c->endpoint_params = NULL;
c->is_wrong_endpoint = false;
c->body = NULL;
c->body_length = 0;
c->pairing_id = -1;
c->encrypted = false;
c->count_reads = 0;
c->count_writes = 0;
c->disconnect = false;
c->disconnect_ms = 0;
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;
c->is_static = false;
c->is_used = false;
}
client_context_t* client_context_new(WiFiClient *wifiClient) {
for (int i = 0; i < CLIENT_CONTEXT_CACHE_SIZE; i++) {
client_context_t*c = &(cache_client_contexts[i]);
if (!c->is_used) {
c->socket = wifiClient;
c->is_used = true;
CLIENT_INFO(c, "Got client content from the cache %d",i);
return c;
}
}
client_context_t *c = (client_context_t*)malloc(sizeof(client_context_t));
homekit_init_client_context(c, wifiClient);
return c;
}
void client_context_free(client_context_t *c) {
CLIENT_INFO(c, "client content free");
c->body_length = 0;
c->is_wrong_endpoint = false;
c->pairing_id = -1;
c->encrypted = false;
c->count_reads = 0;
c->count_writes = 0;
c->error_write = false;
c->disconnect = false;
c->step = HOMEKIT_CLIENT_STEP_NONE;
if (c->verify_context)
pair_verify_context_free(c->verify_context);
c->verify_context = nullptr;
c->disconnect_ms = 0;
if (c->endpoint_params)
query_params_free(c->endpoint_params);
c->endpoint_params = nullptr;
#ifdef USE_STATIC_HTTP_BODY
if (c->body && c->body ==(char*) static_http_body) {
c->body = nullptr;
}
#endif
if (c->body)
free(c->body);
c->body = nullptr;
c->body_length = 0;
if (c->socket) {
c->socket->stop();
delete c->socket;
c->socket = nullptr;
}
characteristic_event_t *event = NULL;
if (c->event_queue ) {
while (q_pop(c->event_queue, &event)) {
CLIENT_INFO(c, "Client queue is not empty destruct them..");
homekit_value_destruct(&event->value);
free(event);
}
}
if (c->is_static) {
c->is_used = false;
if (c->event_queue)
q_clean(c->event_queue);
return;
}
if (c->event_queue) {
//c->event_queue->clear();
characteristic_event_t *event = NULL;
q_clean(c->event_queue);
q_kill(c->event_queue);
free(c->event_queue);
}
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_integer(json, ch->service->accessory->id);
json_string(json, "iid");
//json_uint32(json, ch->id);
json_integer(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);
json_integer(json, *ch->max_len);
}
if (ch->max_data_len) {
json_string(json, "maxDataLen");
//json_uint32(json, *ch->max_data_len);
json_integer(json, *ch->max_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_integer(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);
CLIENT_INFO(client,"write tlv json encoded_tlv_size:%d,tlv_size:%d", encoded_tlv_size, tlv_size);
//base64_encode_(tlv_data, tlv_size, encoded_tlv_data);
esphap_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 == nullptr || context->socket == nullptr) {
CLIENT_ERROR(context, "The socket is null! (or is closed)");
return;
}
if (context->disconnect) {
context->error_write = true;
return;
}
if (context->error_write ) {
CLIENT_ERROR(context, "error_in_write_data is true, abort write data");
return;
}
int availableForWrite = context->socket->availableForWrite();
bool isChunked = false;
if (availableForWrite < data_size) {
CLIENT_INFO(context, "Socket not available to write size:%d,available:%d", data_size, availableForWrite);
//if(availableForWrite)
context->socket->flush(); //???
isChunked = true;// TCP_MSS < 1460;
}
int attempts = 0;
while (!availableForWrite && attempts < 5) {
availableForWrite = context->socket->availableForWrite();
CLIENT_INFO(context, "Attempt :%d, available:%d", attempts, availableForWrite);
if (!availableForWrite) {
optimistic_yield(1000);
}
else {
isChunked = availableForWrite < data_size;
break;
}
attempts++;
}
int write_size = 0;
//CLIENT_INFO(context, "write size:%d,available:%d, sync:%d,nodelay:%d", data_size, availableForWrite, context->socket->getSync(), context->socket->getNoDelay());
if (isChunked) {
int writed = 0;
int write_oustanding = data_size;
while (availableForWrite && writed< data_size) {
int chunk_writed = context->socket->write(data+writed, min(write_oustanding,availableForWrite));
availableForWrite = context->socket->availableForWrite();
writed += chunk_writed;
write_oustanding -= chunk_writed;
CLIENT_INFO(context, "Socket send chunked :%d,available:%d", writed, availableForWrite);
context->socket->flush(); //???
}
write_size = writed;
}
else {
write_size = context->socket->write(data, data_size);
context->socket->flush();
}
optimistic_yield(1000);
// availableForWrite = context->socket->availableForWrite();
// CLIENT_DEBUG(context, "socket.write, data_size=%d, write_size=%d, availableForWrite=%d, WriteError=%d",
// data_size, write_size, availableForWrite, context->socket->getWriteError());
if (write_size != data_size) {
context->error_write = true;
//context->socket->keepAlive(1, 1, 1); // fast disconnected internally in 1 second.
CLIENT_ERROR(context, "socket.write, data_size=%d, write_size=%d", data_size, write_size);
}
}
int client_send_encrypted_(client_context_t *context,
byte *payload, size_t size) {
CLIENT_DEBUG(context, "client_send_encrypted_ size=%d", size);
if (!context || !context->encrypted)
return -1;
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;
}
//将设备的notify事件（如各种状态改变存起来）
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_DEBUG(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);*/
//client->event_queue->add(event);
//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");
#ifdef HOMEKIT_DEBUG
if (data_size < 4096) {
char *payload = binary_to_string(data, data_size);
CLIENT_DEBUG(context, "Sending payload: %s", payload);
free(payload);
}
#endif
if (context->encrypted) {
int r = client_send_encrypted_(context, data, data_size);
if (r) {