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AsyncTCP.cpp
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/*
Asynchronous TCP library for Espressif MCUs
Copyright (c) 2016 Hristo Gochkov. All rights reserved.
This file is part of the esp8266 core for Arduino environment.
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.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "Arduino.h"
#include "AsyncTCP.h"
extern "C"{
#include "lwip/opt.h"
#include "lwip/tcp.h"
#include "lwip/inet.h"
#include "lwip/dns.h"
#include "lwip/err.h"
}
#include "esp_task_wdt.h"
/*
* TCP/IP Event Task
* */
typedef enum {
LWIP_TCP_SENT, LWIP_TCP_RECV, LWIP_TCP_FIN, LWIP_TCP_ERROR, LWIP_TCP_POLL, LWIP_TCP_CLEAR, LWIP_TCP_ACCEPT, LWIP_TCP_CONNECTED, LWIP_TCP_DNS
} lwip_event_t;
typedef struct {
lwip_event_t event;
void *arg;
union {
struct {
void * pcb;
int8_t err;
} connected;
struct {
int8_t err;
} error;
struct {
tcp_pcb * pcb;
uint16_t len;
} sent;
struct {
tcp_pcb * pcb;
pbuf * pb;
int8_t err;
} recv;
struct {
tcp_pcb * pcb;
int8_t err;
} fin;
struct {
tcp_pcb * pcb;
} poll;
struct {
AsyncClient * client;
} accept;
struct {
const char * name;
ip_addr_t addr;
} dns;
};
} lwip_event_packet_t;
static xQueueHandle _async_queue;
static TaskHandle_t _async_service_task_handle = NULL;
static inline bool _init_async_event_queue(){
if(!_async_queue){
_async_queue = xQueueCreate(32, sizeof(lwip_event_packet_t *));
if(!_async_queue){
return false;
}
}
return true;
}
static inline bool _send_async_event(lwip_event_packet_t ** e){
return _async_queue && xQueueSend(_async_queue, e, portMAX_DELAY) == pdPASS;
}
static inline bool _prepend_async_event(lwip_event_packet_t ** e){
return _async_queue && xQueueSendToFront(_async_queue, e, portMAX_DELAY) == pdPASS;
}
static inline bool _get_async_event(lwip_event_packet_t ** e){
return _async_queue && xQueueReceive(_async_queue, e, portMAX_DELAY) == pdPASS;
}
static bool _remove_events_with_arg(void * arg){
lwip_event_packet_t * first_packet = NULL;
lwip_event_packet_t * packet = NULL;
if(!_async_queue){
return false;
}
//figure out which is the first packet so we can keep the order
while(!first_packet){
if(xQueueReceive(_async_queue, &first_packet, 0) != pdPASS){
return false;
}
//discard packet if matching
if((int)first_packet->arg == (int)arg){
free(first_packet);
first_packet = NULL;
//return first packet to the back of the queue
} else if(xQueueSend(_async_queue, &first_packet, portMAX_DELAY) != pdPASS){
return false;
}
}
while(xQueuePeek(_async_queue, &packet, 0) == pdPASS && packet != first_packet){
if(xQueueReceive(_async_queue, &packet, 0) != pdPASS){
return false;
}
if((int)packet->arg == (int)arg){
free(packet);
packet = NULL;
} else if(xQueueSend(_async_queue, &packet, portMAX_DELAY) != pdPASS){
return false;
}
}
return true;
}
static void _handle_async_event(lwip_event_packet_t * e){
if(e->event == LWIP_TCP_CLEAR){
_remove_events_with_arg(e->arg);
} else if(e->event == LWIP_TCP_RECV){
//ets_printf("-R: 0x%08x\n", e->recv.pcb);
AsyncClient::_s_recv(e->arg, e->recv.pcb, e->recv.pb, e->recv.err);
} else if(e->event == LWIP_TCP_FIN){
//ets_printf("-F: 0x%08x\n", e->fin.pcb);
AsyncClient::_s_fin(e->arg, e->fin.pcb, e->fin.err);
} else if(e->event == LWIP_TCP_SENT){
//ets_printf("-S: 0x%08x\n", e->sent.pcb);
AsyncClient::_s_sent(e->arg, e->sent.pcb, e->sent.len);
} else if(e->event == LWIP_TCP_POLL){
//ets_printf("-P: 0x%08x\n", e->poll.pcb);
AsyncClient::_s_poll(e->arg, e->poll.pcb);
} else if(e->event == LWIP_TCP_ERROR){
//ets_printf("-E: 0x%08x %d\n", e->arg, e->error.err);
AsyncClient::_s_error(e->arg, e->error.err);
} else if(e->event == LWIP_TCP_CONNECTED){
//ets_printf("C: 0x%08x 0x%08x %d\n", e->arg, e->connected.pcb, e->connected.err);
AsyncClient::_s_connected(e->arg, e->connected.pcb, e->connected.err);
} else if(e->event == LWIP_TCP_ACCEPT){
//ets_printf("A: 0x%08x 0x%08x\n", e->arg, e->accept.client);
AsyncServer::_s_accepted(e->arg, e->accept.client);
} else if(e->event == LWIP_TCP_DNS){
//ets_printf("D: 0x%08x %s = %s\n", e->arg, e->dns.name, ipaddr_ntoa(&e->dns.addr));
AsyncClient::_s_dns_found(e->dns.name, &e->dns.addr, e->arg);
}
free((void*)(e));
}
static void _async_service_task(void *pvParameters){
lwip_event_packet_t * packet = NULL;
for (;;) {
if(_get_async_event(&packet)){
#if CONFIG_ASYNC_TCP_USE_WDT
if(esp_task_wdt_add(NULL) != ESP_OK){
log_e("Failed to add async task to WDT");
}
#endif
_handle_async_event(packet);
#if CONFIG_ASYNC_TCP_USE_WDT
if(esp_task_wdt_delete(NULL) != ESP_OK){
log_e("Failed to remove loop task from WDT");
}
#endif
}
}
vTaskDelete(NULL);
_async_service_task_handle = NULL;
}
/*
static void _stop_async_task(){
if(_async_service_task_handle){
vTaskDelete(_async_service_task_handle);
_async_service_task_handle = NULL;
}
}
*/
static bool _start_async_task(){
if(!_init_async_event_queue()){
return false;
}
if(!_async_service_task_handle){
xTaskCreateUniversal(_async_service_task, "async_tcp", 8192 * 2, NULL, 3, &_async_service_task_handle, CONFIG_ASYNC_TCP_RUNNING_CORE);
if(!_async_service_task_handle){
return false;
}
}
return true;
}
/*
* LwIP Callbacks
* */
static int8_t _tcp_clear_events(void * arg) {
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->event = LWIP_TCP_CLEAR;
e->arg = arg;
if (!_prepend_async_event(&e)) {
free((void*)(e));
}
return ERR_OK;
}
static int8_t _tcp_connected(void * arg, tcp_pcb * pcb, int8_t err) {
//ets_printf("+C: 0x%08x\n", pcb);
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->event = LWIP_TCP_CONNECTED;
e->arg = arg;
e->connected.pcb = pcb;
e->connected.err = err;
if (!_prepend_async_event(&e)) {
free((void*)(e));
}
return ERR_OK;
}
static int8_t _tcp_poll(void * arg, struct tcp_pcb * pcb) {
//ets_printf("+P: 0x%08x\n", pcb);
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->event = LWIP_TCP_POLL;
e->arg = arg;
e->poll.pcb = pcb;
if (!_send_async_event(&e)) {
free((void*)(e));
}
return ERR_OK;
}
static int8_t _tcp_recv(void * arg, struct tcp_pcb * pcb, struct pbuf *pb, int8_t err) {
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->arg = arg;
if(pb){
//ets_printf("+R: 0x%08x\n", pcb);
e->event = LWIP_TCP_RECV;
e->recv.pcb = pcb;
e->recv.pb = pb;
e->recv.err = err;
} else {
//ets_printf("+F: 0x%08x\n", pcb);
e->event = LWIP_TCP_FIN;
e->fin.pcb = pcb;
e->fin.err = err;
//close the PCB in LwIP thread
AsyncClient::_s_lwip_fin(e->arg, e->fin.pcb, e->fin.err);
}
if (!_send_async_event(&e)) {
free((void*)(e));
}
return ERR_OK;
}
static int8_t _tcp_sent(void * arg, struct tcp_pcb * pcb, uint16_t len) {
//ets_printf("+S: 0x%08x\n", pcb);
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->event = LWIP_TCP_SENT;
e->arg = arg;
e->sent.pcb = pcb;
e->sent.len = len;
if (!_send_async_event(&e)) {
free((void*)(e));
}
return ERR_OK;
}
static void _tcp_error(void * arg, int8_t err) {
//ets_printf("+E: 0x%08x\n", arg);
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->event = LWIP_TCP_ERROR;
e->arg = arg;
e->error.err = err;
if (!_send_async_event(&e)) {
free((void*)(e));
}
}
static void _tcp_dns_found(const char * name, struct ip_addr * ipaddr, void * arg) {
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->event = LWIP_TCP_DNS;
e->arg = arg;
e->dns.name = name;
memcpy(&e->dns.addr, ipaddr, sizeof(struct ip_addr));
if (!_send_async_event(&e)) {
free((void*)(e));
}
}
//Used to switch out from LwIP thread
static int8_t _tcp_accept(void * arg, AsyncClient * client) {
lwip_event_packet_t * e = (lwip_event_packet_t *)malloc(sizeof(lwip_event_packet_t));
e->event = LWIP_TCP_ACCEPT;
e->arg = arg;
e->accept.client = client;
if (!_prepend_async_event(&e)) {
free((void*)(e));
}
return ERR_OK;
}
/*
* TCP/IP API Calls
* */
#include "lwip/priv/tcpip_priv.h"
typedef struct {
struct tcpip_api_call_data call;
tcp_pcb * pcb;
AsyncClient * client;
int8_t err;
union {
struct {
const char* data;
size_t size;
uint8_t apiflags;
} write;
size_t received;
struct {
ip_addr_t * addr;
uint16_t port;
tcp_connected_fn cb;
} connect;
struct {
ip_addr_t * addr;
uint16_t port;
} bind;
uint8_t backlog;
};
} tcp_api_call_t;
static err_t _tcp_output_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = ERR_CONN;
if(msg->client && msg->client->pcb() == msg->pcb){
msg->err = tcp_output(msg->pcb);
}
return msg->err;
}
static esp_err_t _tcp_output(tcp_pcb * pcb, AsyncClient * client) {
if(!pcb){
return ERR_CONN;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.client = client;
tcpip_api_call(_tcp_output_api, (struct tcpip_api_call_data*)&msg);
return msg.err;
}
static err_t _tcp_write_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = ERR_CONN;
if(msg->client && msg->client->pcb() == msg->pcb){
msg->err = tcp_write(msg->pcb, msg->write.data, msg->write.size, msg->write.apiflags);
}
return msg->err;
}
static esp_err_t _tcp_write(tcp_pcb * pcb, const char* data, size_t size, uint8_t apiflags, AsyncClient * client) {
if(!pcb){
return ERR_CONN;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.client = client;
msg.write.data = data;
msg.write.size = size;
msg.write.apiflags = apiflags;
tcpip_api_call(_tcp_write_api, (struct tcpip_api_call_data*)&msg);
return msg.err;
}
static err_t _tcp_recved_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = ERR_CONN;
if(msg->client && msg->client->pcb() == msg->pcb){
msg->err = 0;
tcp_recved(msg->pcb, msg->received);
}
return msg->err;
}
static esp_err_t _tcp_recved(tcp_pcb * pcb, size_t len, AsyncClient * client) {
if(!pcb){
return ERR_CONN;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.client = client;
msg.received = len;
tcpip_api_call(_tcp_recved_api, (struct tcpip_api_call_data*)&msg);
return msg.err;
}
static err_t _tcp_close_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = ERR_CONN;
if(!msg->client || msg->client->pcb() == msg->pcb){
msg->err = tcp_close(msg->pcb);
}
return msg->err;
}
static esp_err_t _tcp_close(tcp_pcb * pcb, AsyncClient * client) {
if(!pcb){
return ERR_CONN;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.client = client;
tcpip_api_call(_tcp_close_api, (struct tcpip_api_call_data*)&msg);
return msg.err;
}
static err_t _tcp_abort_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = ERR_CONN;
if(!msg->client || msg->client->pcb() == msg->pcb){
tcp_abort(msg->pcb);
}
return msg->err;
}
static esp_err_t _tcp_abort(tcp_pcb * pcb, AsyncClient * client) {
if(!pcb){
return ERR_CONN;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.client = client;
tcpip_api_call(_tcp_abort_api, (struct tcpip_api_call_data*)&msg);
return msg.err;
}
static err_t _tcp_connect_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = tcp_connect(msg->pcb, msg->connect.addr, msg->connect.port, msg->connect.cb);
return msg->err;
}
static esp_err_t _tcp_connect(tcp_pcb * pcb, ip_addr_t * addr, uint16_t port, tcp_connected_fn cb) {
if(!pcb){
return ESP_FAIL;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.connect.addr = addr;
msg.connect.port = port;
msg.connect.cb = cb;
tcpip_api_call(_tcp_connect_api, (struct tcpip_api_call_data*)&msg);
return msg.err;
}
static err_t _tcp_bind_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = tcp_bind(msg->pcb, msg->bind.addr, msg->bind.port);
return msg->err;
}
static esp_err_t _tcp_bind(tcp_pcb * pcb, ip_addr_t * addr, uint16_t port) {
if(!pcb){
return ESP_FAIL;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.bind.addr = addr;
msg.bind.port = port;
tcpip_api_call(_tcp_bind_api, (struct tcpip_api_call_data*)&msg);
return msg.err;
}
static err_t _tcp_listen_api(struct tcpip_api_call_data *api_call_msg){
tcp_api_call_t * msg = (tcp_api_call_t *)api_call_msg;
msg->err = 0;
msg->pcb = tcp_listen_with_backlog(msg->pcb, msg->backlog);
return msg->err;
}
static tcp_pcb * _tcp_listen_with_backlog(tcp_pcb * pcb, uint8_t backlog) {
if(!pcb){
return NULL;
}
tcp_api_call_t msg;
msg.pcb = pcb;
msg.backlog = backlog?backlog:0xFF;
tcpip_api_call(_tcp_listen_api, (struct tcpip_api_call_data*)&msg);
return msg.pcb;
}
/*
Async TCP Client
*/
AsyncClient::AsyncClient(tcp_pcb* pcb)
: _connect_cb(0)
, _connect_cb_arg(0)
, _discard_cb(0)
, _discard_cb_arg(0)
, _sent_cb(0)
, _sent_cb_arg(0)
, _error_cb(0)
, _error_cb_arg(0)
, _recv_cb(0)
, _recv_cb_arg(0)
, _pb_cb(0)
, _pb_cb_arg(0)
, _timeout_cb(0)
, _timeout_cb_arg(0)
, _pcb_busy(false)
, _pcb_sent_at(0)
, _ack_pcb(true)
, _rx_last_packet(0)
, _rx_since_timeout(0)
, _ack_timeout(ASYNC_MAX_ACK_TIME)
, _connect_port(0)
, prev(NULL)
, next(NULL)
{
_pcb = pcb;
if(_pcb){
_rx_last_packet = millis();
tcp_arg(_pcb, this);
tcp_recv(_pcb, &_tcp_recv);
tcp_sent(_pcb, &_tcp_sent);
tcp_err(_pcb, &_tcp_error);
tcp_poll(_pcb, &_tcp_poll, 1);
}
}
AsyncClient::~AsyncClient(){
if(_pcb) {
_close();
}
}
/*
* Operators
* */
AsyncClient& AsyncClient::operator=(const AsyncClient& other){
if (_pcb) {
_close();
}
_pcb = other._pcb;
if (_pcb) {
_rx_last_packet = millis();
tcp_arg(_pcb, this);
tcp_recv(_pcb, &_tcp_recv);
tcp_sent(_pcb, &_tcp_sent);
tcp_err(_pcb, &_tcp_error);
tcp_poll(_pcb, &_tcp_poll, 1);
}
return *this;
}
bool AsyncClient::operator==(const AsyncClient &other) {
return _pcb == other._pcb;
}
AsyncClient & AsyncClient::operator+=(const AsyncClient &other) {
if(next == NULL){
next = (AsyncClient*)(&other);
next->prev = this;
} else {
AsyncClient *c = next;
while(c->next != NULL) {
c = c->next;
}
c->next =(AsyncClient*)(&other);
c->next->prev = c;
}
return *this;
}
/*
* Callback Setters
* */
void AsyncClient::onConnect(AcConnectHandler cb, void* arg){
_connect_cb = cb;
_connect_cb_arg = arg;
}
void AsyncClient::onDisconnect(AcConnectHandler cb, void* arg){
_discard_cb = cb;
_discard_cb_arg = arg;
}
void AsyncClient::onAck(AcAckHandler cb, void* arg){
_sent_cb = cb;
_sent_cb_arg = arg;
}
void AsyncClient::onError(AcErrorHandler cb, void* arg){
_error_cb = cb;
_error_cb_arg = arg;
}
void AsyncClient::onData(AcDataHandler cb, void* arg){
_recv_cb = cb;
_recv_cb_arg = arg;
}
void AsyncClient::onPacket(AcPacketHandler cb, void* arg){
_pb_cb = cb;
_pb_cb_arg = arg;
}
void AsyncClient::onTimeout(AcTimeoutHandler cb, void* arg){
_timeout_cb = cb;
_timeout_cb_arg = arg;
}
void AsyncClient::onPoll(AcConnectHandler cb, void* arg){
_poll_cb = cb;
_poll_cb_arg = arg;
}
/*
* Main Public Methods
* */
bool AsyncClient::connect(IPAddress ip, uint16_t port){
if (_pcb){
log_w("already connected, state %d", _pcb->state);
return false;
}
if(!_start_async_task()){
log_e("failed to start task");
return false;
}
ip_addr_t addr;
addr.type = IPADDR_TYPE_V4;
addr.u_addr.ip4.addr = ip;
tcp_pcb* pcb = tcp_new_ip_type(IPADDR_TYPE_V4);
if (!pcb){
log_e("pcb == NULL");
return false;
}
tcp_arg(pcb, this);
tcp_err(pcb, &_tcp_error);
tcp_recv(pcb, &_tcp_recv);
tcp_sent(pcb, &_tcp_sent);
tcp_poll(pcb, &_tcp_poll, 1);
//_tcp_connect(pcb, &addr, port,(tcp_connected_fn)&_s_connected);
_tcp_connect(pcb, &addr, port,(tcp_connected_fn)&_tcp_connected);
return true;
}
bool AsyncClient::connect(const char* host, uint16_t port){
ip_addr_t addr;
if(!_start_async_task()){
Serial.println("failed to start task");
log_e("failed to start task");
return false;
}
err_t err = dns_gethostbyname(host, &addr, (dns_found_callback)&_tcp_dns_found, this);
if(err == ERR_OK) {
return connect(IPAddress(addr.u_addr.ip4.addr), port);
} else if(err == ERR_INPROGRESS) {
_connect_port = port;
return true;
}
log_e("error: %d", err);
return false;
}
void AsyncClient::close(bool now){
if(_pcb){
_tcp_recved(_pcb, _rx_ack_len, this);
}
_close();
}
int8_t AsyncClient::abort(){
if(_pcb) {
_tcp_abort(_pcb, this);
_pcb = NULL;
}
return ERR_ABRT;
}
size_t AsyncClient::space(){
if((_pcb != NULL) && (_pcb->state == 4)){
return tcp_sndbuf(_pcb);
}
return 0;
}
size_t AsyncClient::add(const char* data, size_t size, uint8_t apiflags) {
if(!_pcb || size == 0 || data == NULL) {
return 0;
}
size_t room = space();
if(!room) {
return 0;
}
size_t will_send = (room < size) ? room : size;
int8_t err = ERR_OK;
err = _tcp_write(_pcb, data, will_send, apiflags, this);
if(err != ERR_OK) {
return 0;
}
return will_send;
}
bool AsyncClient::send(){
int8_t err = ERR_OK;
err = _tcp_output(_pcb, this);
if(err == ERR_OK){
_pcb_busy = true;
_pcb_sent_at = millis();
return true;
}
return false;
}
size_t AsyncClient::ack(size_t len){
if(len > _rx_ack_len)
len = _rx_ack_len;
if(len){
_tcp_recved(_pcb, len, this);
}
_rx_ack_len -= len;
return len;
}
void AsyncClient::ackPacket(struct pbuf * pb){
if(!pb){
return;
}
_tcp_recved(_pcb, pb->len, this);
pbuf_free(pb);
}
/*
* Main Private Methods
* */
int8_t AsyncClient::_close(){
//ets_printf("X: 0x%08x\n", (uint32_t)this);
int8_t err = ERR_OK;
if(_pcb) {
//log_i("");
tcp_arg(_pcb, NULL);
tcp_sent(_pcb, NULL);
tcp_recv(_pcb, NULL);
tcp_err(_pcb, NULL);
tcp_poll(_pcb, NULL, 0);
_tcp_clear_events(this);
err = _tcp_close(_pcb, this);
if(err != ERR_OK) {
err = abort();
}
_pcb = NULL;
if(_discard_cb) {
_discard_cb(_discard_cb_arg, this);
}
}
return err;
}
/*
* Private Callbacks
* */
int8_t AsyncClient::_connected(void* pcb, int8_t err){
_pcb = reinterpret_cast<tcp_pcb*>(pcb);
if(_pcb){
_rx_last_packet = millis();
_pcb_busy = false;
// tcp_recv(_pcb, &_tcp_recv);
// tcp_sent(_pcb, &_tcp_sent);
// tcp_poll(_pcb, &_tcp_poll, 1);
}
if(_connect_cb) {
_connect_cb(_connect_cb_arg, this);
}
return ERR_OK;
}
void AsyncClient::_error(int8_t err) {
if(_pcb){
tcp_arg(_pcb, NULL);
tcp_sent(_pcb, NULL);
tcp_recv(_pcb, NULL);
tcp_err(_pcb, NULL);
tcp_poll(_pcb, NULL, 0);
_pcb = NULL;
}
if(_error_cb) {
_error_cb(_error_cb_arg, this, err);
}
if(_discard_cb) {
_discard_cb(_discard_cb_arg, this);
}
}
//In LwIP Thread
int8_t AsyncClient::_lwip_fin(tcp_pcb* pcb, int8_t err) {
if(!_pcb || pcb != _pcb){
log_e("0x%08x != 0x%08x", (uint32_t)pcb, (uint32_t)_pcb);
return ERR_OK;
}
tcp_arg(_pcb, NULL);
tcp_sent(_pcb, NULL);
tcp_recv(_pcb, NULL);
tcp_err(_pcb, NULL);
tcp_poll(_pcb, NULL, 0);
if(tcp_close(_pcb) != ERR_OK) {
tcp_abort(_pcb);
}
_pcb = NULL;
return ERR_OK;
}
//In Async Thread
int8_t AsyncClient::_fin(tcp_pcb* pcb, int8_t err) {
_tcp_clear_events(this);
if(_discard_cb) {
_discard_cb(_discard_cb_arg, this);
}
return ERR_OK;
}
int8_t AsyncClient::_sent(tcp_pcb* pcb, uint16_t len) {
_rx_last_packet = millis();
//log_i("%u", len);
_pcb_busy = false;
if(_sent_cb) {
_sent_cb(_sent_cb_arg, this, len, (millis() - _pcb_sent_at));
}
return ERR_OK;
}
int8_t AsyncClient::_recv(tcp_pcb* pcb, pbuf* pb, int8_t err) {
while(pb != NULL) {
_rx_last_packet = millis();
//we should not ack before we assimilate the data
_ack_pcb = true;
pbuf *b = pb;
pb = b->next;
b->next = NULL;
if(_pb_cb){
_pb_cb(_pb_cb_arg, this, b);
} else {
if(_recv_cb) {
_recv_cb(_recv_cb_arg, this, b->payload, b->len);
}
if(!_ack_pcb) {
_rx_ack_len += b->len;
} else if(_pcb) {
_tcp_recved(_pcb, b->len, this);
}
pbuf_free(b);
}
}
return ERR_OK;
}
int8_t AsyncClient::_poll(tcp_pcb* pcb){
if(!_pcb){
log_w("pcb is NULL");
return ERR_OK;
}
if(pcb != _pcb){
log_e("0x%08x != 0x%08x", (uint32_t)pcb, (uint32_t)_pcb);
return ERR_OK;
}
uint32_t now = millis();
// ACK Timeout
if(_pcb_busy && _ack_timeout && (now - _pcb_sent_at) >= _ack_timeout){
_pcb_busy = false;
log_w("ack timeout %d", pcb->state);
if(_timeout_cb)
_timeout_cb(_timeout_cb_arg, this, (now - _pcb_sent_at));
return ERR_OK;
}
// RX Timeout
if(_rx_since_timeout && (now - _rx_last_packet) >= (_rx_since_timeout * 1000)){
log_w("rx timeout %d", pcb->state);
_close();
return ERR_OK;
}
// Everything is fine
if(_poll_cb) {
_poll_cb(_poll_cb_arg, this);
}
return ERR_OK;
}
void AsyncClient::_dns_found(struct ip_addr *ipaddr){
if(ipaddr){
connect(IPAddress(ipaddr->u_addr.ip4.addr), _connect_port);
} else {
if(_error_cb) {
_error_cb(_error_cb_arg, this, -55);
}
if(_discard_cb) {
_discard_cb(_discard_cb_arg, this);
}
}
}
/*
* Public Helper Methods
* */
void AsyncClient::stop() {
close(false);
}
bool AsyncClient::free(){
if(!_pcb) {
return true;
}
if(_pcb->state == 0 || _pcb->state > 4) {
return true;
}
return false;
}
size_t AsyncClient::write(const char* data) {
if(data == NULL) {
return 0;
}
return write(data, strlen(data));
}
size_t AsyncClient::write(const char* data, size_t size, uint8_t apiflags) {
size_t will_send = add(data, size, apiflags);
if(!will_send || !send()) {
return 0;
}
return will_send;
}
void AsyncClient::setRxTimeout(uint32_t timeout){
_rx_since_timeout = timeout;
}
uint32_t AsyncClient::getRxTimeout(){
return _rx_since_timeout;
}
uint32_t AsyncClient::getAckTimeout(){
return _ack_timeout;
}
void AsyncClient::setAckTimeout(uint32_t timeout){
_ack_timeout = timeout;
}
void AsyncClient::setNoDelay(bool nodelay){
if(!_pcb) {
return;
}
if(nodelay) {
tcp_nagle_disable(_pcb);
} else {
tcp_nagle_enable(_pcb);
}
}
bool AsyncClient::getNoDelay(){
if(!_pcb) {
return false;
}