/******************************************************************************
* FunctionName : espconn_close
* Description : The connection has been successfully closed.
* Parameters : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR espconn_tcp_disconnect(espconn_msg *pdiscon)
{
if (pdiscon != NULL){
if (pdiscon->preverse != NULL)
espconn_server_close(pdiscon, pdiscon->pcommon.pcb);
else
espconn_client_close(pdiscon, pdiscon->pcommon.pcb);
} else{
espconn_printf("espconn_server_disconnect err.\n");
}
}
/******************************************************************************
* FunctionName : espconn_close
* Description : The connection has been successfully closed.
* Parameters : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR espconn_tcp_disconnect(espconn_msg *pdiscon,uint8 type)
{
if (pdiscon != NULL){
/*disconnect with the host by send the FIN frame*/
if (pdiscon->preverse != NULL)
espconn_server_close(pdiscon, pdiscon->pcommon.pcb,type);
else
espconn_client_close(pdiscon, pdiscon->pcommon.pcb,type);
} else{
espconn_printf("espconn_tcp_disconnect err.\n");
}
}
/******************************************************************************
* FunctionName : espconn_client_recv
* Description : Data has been received on this pcb.
* Parameters : arg -- Additional argument to pass to the callback function
* pcb -- The connection pcb which received data
* p -- The received data (or NULL when the connection has been closed!)
* err -- An error code if there has been an error receiving
* Returns : ERR_ABRT: if you have called tcp_abort from within the function!
*******************************************************************************/
static err_t ICACHE_FLASH_ATTR
espconn_client_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
{
espconn_msg *precv_cb = arg;
tcp_arg(pcb, arg);
if (p != NULL) {
/*To update and advertise a larger window*/
if(precv_cb->recv_hold_flag == 0)
tcp_recved(pcb, p->tot_len);
else
precv_cb->recv_holded_buf_Len += p->tot_len;
}
if (err == ERR_OK && p != NULL) {
char *pdata = NULL;
u16_t length = 0;
/*Copy the contents of a packet buffer to an application buffer.
*to prevent memory leaks, ensure that each allocated is deleted*/
pdata = (char *)malloc(p ->tot_len + 1);
length = pbuf_copy_partial(p, pdata, p ->tot_len, 0);
pbuf_free(p);
if (length != 0) {
/*switch the state of espconn for application process*/
precv_cb->pespconn ->state = ESPCONN_READ;
precv_cb->pcommon.pcb = pcb;
if (precv_cb->pespconn->recv_callback != NULL) {
precv_cb->pespconn->recv_callback(precv_cb->pespconn, pdata, length);
}
/*switch the state of espconn for next packet copy*/
if (pcb->state == ESTABLISHED)
precv_cb->pespconn ->state = ESPCONN_CONNECT;
}
/*to prevent memory leaks, ensure that each allocated is deleted*/
free(pdata);
pdata = NULL;
}
if (err == ERR_OK && p == NULL) {
espconn_client_close(precv_cb, pcb,0);
}
return ERR_OK;
}
/******************************************************************************
* FunctionName : espconn_client_poll
* Description : The poll function is called every 2nd second.
* If there has been no data sent (which resets the retries) in 8 seconds, close.
* If the last portion of a file has not been sent in 2 seconds, close.
*
* This could be increased, but we don't want to waste resources for bad connections.
* Parameters : arg -- Additional argument to pass to the callback function
* pcb -- The connection pcb for which data has been acknowledged
* Returns : ERR_OK: try to send some data by calling tcp_output
* ERR_ABRT: if you have called tcp_abort from within the function!
*******************************************************************************/
static err_t ICACHE_FLASH_ATTR
espconn_client_poll(void *arg, struct tcp_pcb *pcb)
{
espconn_msg *ppoll_cb = arg;
espconn_printf("espconn_client_poll pcb %p %p %d\n", pcb, arg, pcb->state);
if (arg == NULL) {
tcp_abandon(pcb, 0);
tcp_poll(pcb, NULL, 0);
return ERR_OK;
}
ppoll_cb->pcommon.pcb = pcb;
if (pcb->state == ESTABLISHED) {
} else {
tcp_poll(pcb, espconn_client_poll, 0);
espconn_client_close(ppoll_cb->pespconn, pcb);
}
return ERR_OK;
}
/******************************************************************************
* FunctionName : espconn_client_recv
* Description : Data has been received on this pcb.
* Parameters : arg -- Additional argument to pass to the callback function
* pcb -- The connection pcb which received data
* p -- The received data (or NULL when the connection has been closed!)
* err -- An error code if there has been an error receiving
* Returns : ERR_ABRT: if you have called tcp_abort from within the function!
*******************************************************************************/
static err_t ICACHE_FLASH_ATTR
espconn_client_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
{
espconn_msg *precv_cb = arg;
tcp_arg(pcb, arg);
if (p != NULL) {
tcp_recved(pcb, p ->tot_len);
}
if (err == ERR_OK && p != NULL) {
char *pdata = NULL;
u16_t length = 0;
pdata = (char *)os_zalloc(p ->tot_len + 1);
length = pbuf_copy_partial(p, pdata, p ->tot_len, 0);
pbuf_free(p);
if (length != 0) {
precv_cb->pespconn ->state = ESPCONN_READ;
precv_cb->pcommon.pcb = pcb;
if (precv_cb->pespconn->recv_callback != NULL) {
precv_cb->pespconn->recv_callback(precv_cb->pespconn, pdata, length);
}
precv_cb->pespconn ->state = ESPCONN_CONNECT;
}
os_free(pdata);
pdata = NULL;
}
if (err == ERR_OK && p == NULL) {
espconn_client_close(precv_cb, pcb);
}
return ERR_OK;
}