/**
* Error handler callback.
* Although this is called `reconnect` by Espressif, this is really a connection reset callback.
*/
static void esp8266_callback_reconnectCB(
void *arg, //!< A pointer to a `struct espconn`.
sint8 err //!< The error code.
) {
struct espconn *pEspconn = (struct espconn *)arg;
struct socketData *pSocketData = (struct socketData *)pEspconn->reverse;
if (pSocketData == NULL) return; // we already closed this.
//if (pEspconn != pSocketData->pEspconn) DBG("%s: pEspconn changed in reconnectCB ***\n", DBG_LIB);
DBG("%s: socket %d connection reset: Err %d - %s\n", DBG_LIB,
pSocketData->socketId, err, esp8266_errorToString(err));
// Do the same as for a disconnect
esp8266_callback_disconnectCB(arg);
// Set the socket state as in error (unless it got freed by esp8266_callback_disconnectCB)
if (pSocketData->state != SOCKET_STATE_UNUSED)
setSocketInError(pSocketData, err);
//DBG("%s: ret from reconnectCB\n", DBG_LIB);
}
/**
* ESP8266 callback function that is invoked when new data has arrived over
* the TCP/IP connection.
*/
static void esp8266_callback_recvCB(
void *arg, //!< A pointer to a `struct espconn`.
char *pData, //!< A pointer to data received over the socket.
unsigned short len //!< The length of the data.
) {
struct espconn *pEspconn = (struct espconn *)arg;
struct socketData *pSocketData = (struct socketData *)pEspconn->reverse;
if (pSocketData == NULL) return; // we closed this socket
//if (pEspconn != pSocketData->pEspconn) DBG("%s: pEspconn changed in recvCB ***\n", DBG_LIB);
assert(pSocketData->state != SOCKET_STATE_UNUSED);
//DBG("%s: socket %d recv %d\n", DBG_LIB, pSocketData->socketId, len);
//DBG("%s: recv data: %p\n", DBG_LIB, pData);
// if this is a dead connection then just ignore the callback
if (pSocketData->state == SOCKET_STATE_ABORTING ||
pSocketData->state == SOCKET_STATE_TO_ABORT ||
pSocketData->state == SOCKET_STATE_CLOSED ||
pSocketData->state == SOCKET_STATE_DISCONNECTING) {
return;
}
// Allocate a buffer and add to the receive queue
PktBuf *buf = PktBuf_New(len);
if (!buf) {
// handle out of memory condition
DBG("%s: Out of memory allocating %d for recv\n", DBG_LIB, len);
// at this point we're gonna deallocate all receive buffers as a panic measure
while (pSocketData->rxBufQ != NULL)
pSocketData->rxBufQ = PktBuf_ShiftFree(pSocketData->rxBufQ);
// save the error
setSocketInError(pSocketData, ESPCONN_MEM);
// now reset the connection
//espconn_abort(pEspconn); // can't do this: espconn crashes!
pSocketData->state = SOCKET_STATE_TO_ABORT; // some function called from socket lib will abort
//DBG("%s: ret from recvCB\n", DBG_LIB);
return;
}
// if this is the second buffer then stop the flood!
if (pSocketData->rxBufQ != NULL) espconn_recv_hold(pEspconn);
// got buffer, fill it
os_memcpy(buf->data, pData, len);
buf->filled = len;
pSocketData->rxBufQ = PktBuf_Push(pSocketData->rxBufQ, buf);
}
/**
* Create a new socket.
* if `ipAddress == 0`, creates a server otherwise creates a client (and automatically connects). Returns >=0 on success.
*/
int net_ESP8266_BOARD_createSocket(
JsNetwork *net, //!< The Network we are going to use to create the socket.
uint32_t ipAddress, //!< The address of the partner of the socket or 0 if we are to be a server.
unsigned short port //!< The port number that the partner is listening upon.
) {
os_printf("> net_ESP8266_BOARD_createSocket: host: %d.%d.%d.%d, port:%d \n", ((char *)(&ipAddress))[0], ((char *)(&ipAddress))[1], ((char *)(&ipAddress))[2], ((char *)(&ipAddress))[3], port);
bool isServer = (ipAddress == 0);
struct socketData *pSocketData = allocateNewSocket();
if (pSocketData == NULL) { // No free socket
os_printf("< net_ESP8266_BOARD_createSocket: No free sockets\n");
return -1;
}
int newSocket = pSocketData->socketId;
pSocketData->pEspconn = (struct espconn *)os_malloc(sizeof(struct espconn));
assert(pSocketData->pEspconn);
struct espconn *pEspconn = pSocketData->pEspconn;
pEspconn->type = ESPCONN_TCP;
pEspconn->state = ESPCONN_NONE;
pEspconn->proto.tcp = (esp_tcp *)os_malloc(sizeof(esp_tcp));
pEspconn->reverse = pSocketData;
assert(pEspconn->proto.tcp != NULL);
os_memset(pEspconn->proto.tcp, 0, sizeof(esp_tcp));
// NOTE: We must not call these functions until AFTER we have allocated storage
// for the 'esp_tcp' structure.
espconn_regist_disconcb(pEspconn, esp8266_callback_disconnectCB);
espconn_regist_reconcb(pEspconn, esp8266_callback_reconnectCB);
espconn_regist_sentcb(pEspconn, esp8266_callback_sentCB);
espconn_regist_recvcb(pEspconn, esp8266_callback_recvCB);
espconn_regist_write_finish(pEspconn, esp8266_callback_writeFinishedCB);
struct ip_info ipconfig;
wifi_get_ip_info(STATION_IF, &ipconfig); // Get the local IP address
os_memcpy(pEspconn->proto.tcp->local_ip, &ipconfig.ip, 4);
// If we are not a server ...
if (isServer == false) {
pSocketData->state = SOCKET_STATE_CONNECTING;
pSocketData->creationType = SOCKET_CREATED_OUTBOUND;
pEspconn->proto.tcp->remote_port = port;
pEspconn->proto.tcp->local_port = espconn_port();
*(uint32 *)(pEspconn->proto.tcp->remote_ip) = ipAddress;
// Ensure that we have flagged this socket as NOT connected
pSocketData->isConnected = false;
espconn_regist_connectcb(pEspconn, esp8266_callback_connectCB_outbound);
// Make a call to espconn_connect.
int rc = espconn_connect(pEspconn);
if (rc != 0) {
os_printf("Err: net_ESP8266_BOARD_createSocket -> espconn_connect returned: %d. Using local port: %d\n", rc, pEspconn->proto.tcp->local_port);
setSocketInError(newSocket, "espconn_connect", rc);
}
}
// If the ipAddress IS 0 ... then we are a server.
else
{
// We are going to set ourselves up as a server
pSocketData->state = SOCKET_STATE_IDLE;
pSocketData->creationType = SOCKET_CREATED_SERVER;
pEspconn->proto.tcp->local_port = port;
espconn_regist_connectcb(pEspconn, esp8266_callback_connectCB_inbound);
// Make a call to espconn_accept
int rc = espconn_accept(pEspconn);
if (rc != 0) {
os_printf("Err: net_ESP8266_BOARD_createSocket -> espconn_accept returned: %d. Using local port: %d\n", rc, pEspconn->proto.tcp->local_port);
setSocketInError(newSocket, "espconn_accept", rc);
}
}
dumpEspConn(pEspconn);
os_printf("< net_ESP8266_BOARD_createSocket, socket=%d\n", newSocket);
return newSocket;
}
