Created
November 19, 2018 23:07
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#include <WiFi.h> | |
#include <AsyncTCP.h> | |
const char* ssid = "your-ssid"; | |
const char* password = "your-pass"; | |
AsyncServer server(23); | |
typedef struct { | |
struct pbuf* pb; | |
size_t index; | |
} packet_buf_t; | |
size_t sendMax(void *obj, AsyncClient* c){ | |
if(!obj || !c || !c->space()){ | |
return 0; | |
} | |
packet_buf_t * buf = (packet_buf_t*)obj; | |
if(!buf->pb){ | |
return 0; | |
} | |
size_t space = c->space(); | |
size_t available = buf->pb->tot_len - buf->index; | |
size_t maxBytes = space; | |
if(space > available){ | |
maxBytes = available; | |
} | |
size_t written = 0; | |
size_t toRead = 0; | |
static uint8_t buffer[8192]; | |
/*uint8_t * buffer = (uint8_t *)malloc(maxBytes); | |
if(!buffer){ | |
return 0; | |
}*/ | |
while(written < maxBytes){ | |
toRead = buf->pb->len - buf->index; | |
if((maxBytes - written) < toRead){ | |
toRead = maxBytes - written; | |
} | |
memcpy(buffer + written, reinterpret_cast<char*>(buf->pb->payload) + buf->index, toRead); | |
written += toRead; | |
buf->index += toRead; | |
if(buf->index == buf->pb->len){ | |
buf->index = 0; | |
if(!buf->pb->next) { | |
c->ackPacket(buf->pb); | |
buf->pb = NULL; | |
} else { | |
struct pbuf * head = buf->pb; | |
buf->pb = buf->pb->next; | |
head->next = NULL; | |
c->ackPacket(head); | |
} | |
} | |
} | |
c->write((const char*)buffer, written, 1); | |
//free(buffer); | |
//Serial.printf("tx:%u\n", written); | |
return written; | |
} | |
void onPacket(void *obj, AsyncClient* c, struct pbuf *pb){ | |
//Serial.printf("rx:%u\n", pb->len); | |
packet_buf_t * buf = (packet_buf_t*)obj; | |
if(buf->pb) { | |
pbuf_cat(buf->pb, pb); | |
} else { | |
buf->pb = pb; | |
buf->index = 0; | |
sendMax(obj, c); | |
} | |
} | |
void onAck(void *obj, AsyncClient* c, size_t len, uint32_t time){ | |
//Serial.printf("ack:%u:%u\n", len, time); | |
sendMax(obj, c); | |
} | |
void onDisconnect(void *obj, AsyncClient* c){ | |
Serial.printf("disconnect\n"); | |
c->free(); | |
delete c; | |
packet_buf_t * buf = (packet_buf_t*)obj; | |
pbuf_free(buf->pb); | |
free(obj); | |
} | |
void onTimeout(void *obj, AsyncClient* c, uint32_t time){ | |
Serial.printf("timeout:%u\n", time); | |
c->close(); | |
} | |
void onClient(void *obj, AsyncClient* c){ | |
packet_buf_t * buf = (packet_buf_t*)malloc(sizeof(packet_buf_t)); | |
if(!buf){ | |
c->close(); | |
c->free(); | |
return; | |
} | |
Serial.printf("connect\n"); | |
buf->pb = NULL; | |
buf->index = 0; | |
c->onDisconnect(onDisconnect, buf); | |
c->onTimeout(onTimeout, buf); | |
c->onAck(onAck, buf); | |
c->onPacket(onPacket, buf); | |
} | |
void setup() { | |
Serial.begin(115200); | |
WiFi.mode(WIFI_STA); | |
WiFi.begin(ssid, password); | |
while (WiFi.waitForConnectResult() != WL_CONNECTED) { | |
Serial.println("Connection Failed! Rebooting..."); | |
delay(1000); | |
ESP.restart(); | |
} | |
Serial.println(WiFi.localIP()); | |
server.onClient(onClient, 0); | |
server.begin(); | |
} | |
void loop() {} |
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