Hi,
I've run your code, with a few changes. I am able to have TCP communication.
First thing I noticed was the large amount of data you're sending [netconn_write(conn, (const unsigned char*)(TXData), (size_t)(1500)), NETCONN_NOCOPY);] is this causing some overflow?
Next step would be checking the configuration. Is there some kind of firewall active between the 2 devices? And do you have enough memory assigned i.e. enough netbuffs/netconns etc. in lwipoprts?
Altered code, pardon my goto's but it's a quick test:
void client_netconn_thread(void* pvParam){
ip_addr_t DEST_IP;
struct netconn *conn = NULL;
struct netbuf *incoming;
IP4_ADDR(&DEST_IP, XXX, XXX, XXX, XXX);
conn = netconn_new(NETCONN_TCP);
if(conn != NULL){
if (ERR_OK != netconn_bind(conn, NULL, MODBUS_PORT))
goto err;
if (ERR_OK != netconn_connect(conn, &DEST_IP, MODBUS_PORT))
goto err;
}
while(true){
if (ERR_OK != netconn_write(conn, "request", 8, NETCONN_NOCOPY))
goto err;
vTaskDelay(500);
if (ERR_OK != netconn_recv(conn, &incoming))
goto err;
if (netconn_err(conn) == ERR_OK){
netbuf_delete(incoming);
}
}
err:
netconn_close(conn);
netconn_delete(conn);
vTaskDelete(NULL);
}
>
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| Met vriendelijke groet / Kind Regards | | Ricardo Schoof | | Embedded Software Engineer |
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-----Original Message-----
> From: lwip-users <address@hidden> On
> Behalf Of tirmalabenikasibeni
> Sent: Tuesday, 30 April 2019 14:44
> To: address@hidden
> Subject: Re: [lwip-users] TCP Client handshakes but no data transmission
>
> I've changed my code like this:
>
> void client_netconn_thread(void){
> ip_addr_t DEST_IP, LOC_IP;
> err_t err0, err2;
> struct netconn *conn;
> struct netbuf *incoming;
> char* buf;
> Ui16 buflen, i;
>
> IP4_ADDR(&LOC_IP, IP_ADDR0, IP_ADDR1, IP_ADDR2, IP_ADDR3 );
> IP4_ADDR(&DEST_IP, DEST_IP_ADDR0, DEST_IP_ADDR1, DEST_IP_ADDR2,
> DEST_IP_ADDR3);
>
> conn = netconn_new(NETCONN_TCP);
>
> if(conn != NULL){
> err0 = netconn_bind(conn, &LOC_IP, MODBUS_PORT);
> netconn_connect(conn, &DEST_IP, MODBUS_PORT);
> }
> if((err0 == ERR_OK)){
> while(TRUE){
> netconn_write(conn, (const unsigned char*)(TXData), (size_t)(1500),
> NETCONN_NOCOPY);
> osDelay(10);
> err2 = netconn_recv(conn, &incoming);
> if(err2 == ERR_OK){
> if (netconn_err(conn) == ERR_OK){
> netbuf_data(incoming, (void**)&buf, &buflen);
>
> for(i=0; i<buflen; i++){
> RXData[i] = *(Ui08 *)buf;
> buf++;
> }
> netbuf_delete(incoming);
> }
> }
> }
> }
> else netconn_delete(conn);
> }
>
> But result is the same, nothing changed. PCAPs has no difference.
>
> Thanks.
>
>
>
> --
> Sent from: http://lwip.100.n7.nabble.com/lwip-users-f3.html
>
> _______________________________________________
> lwip-users mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/lwip-users
tcp.pcapng