Re: [Contiki-developers] compilation error while using psocket

[Sapana K. <sap...@pe...>]

Hi Tom
Thanks for reply.
I have referred psock-server example while implementing this. I have already called   PSOCK_BEIGN and PSOCK_END etc.
The main difference between my code and psocket-server example code is that I have added functions recv and send and called PSCOK_SEND and PSOCK_READBUF in these functions.
I have checked definitions of PSOCK_SEND and PSOCK_READ, here they are call process wait till send and receive is completed by psocket thread. I have not found switch or case statement anywhere in definition still I am getting error “case label not within a switch statement”

Appreciate help.
Thanks
Sapana

From: Tom [mailto:my....@gm...]
Sent: Tuesday, July 08, 2014 10:01 PM
To: Contiki developer mailing list
Subject: Re: [Contiki-developers] compilation error while using psocket

Hi,
To understand the usage start looking at the psock-client or psock-server in examples folder.... From PSOCKs documentation:

 * Because each protosocket runs as a protothread, the protosocket has to be
 * started with a call to PSOCK_BEGIN() at the start of the function
 * in which the protosocket is used. Similarly, the protosocket protothread can
 * be terminated by a call to PSOCK_EXIT().

if you look at the definition of PSOCK_SEND to you will get a better idea of the compilation problem..

Regards,
Tom


On Tue, Jul 8, 2014 at 3:57 PM, Sapana Khemkar <sap...@pe...<mailto:sap...@pe...>> wrote:
Hi developers

I am trying to port polarssl library in Contiki 2.7. I am using psocket for  TCP port.

In Polarssl, I have to set underlying BIO read/write callback functions using ssl_set_bio() function.

My code is something like below

tcp_listen(UIP_HTONS(SERVER_PORT));
while(1)
{
if(uip_connected())
     {
          printf("Client connected...\n");
          PSOCK_INIT(&psocket, inputbuf, sizeof(inputbuf));
          ssl_set_bio( &ssl, recv, &psocket, send, &psocket );
/* wait until the connection is aborted, closed, or times out. */
           while(!(uip_aborted() || uip_closed() || uip_timedout()))
           {
                PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
                handle_connection(&psocket);
           }

     }
}

My recv and send functions are

static int send(void *ctx, const unsigned char *buf, size_t len)
{
     struct psock *psocket = ( struct psock *) ctx;
     //TO DO: handle case if len > PSOCK_DATALEN(psocket)
     PSOCK_SEND(psocket, inputbuf, len);
     //TO DO:check how psocket works if send fails to transmit len bytes Do we have timeout?
     return len;
}

int recv(void *ctx, unsigned char *buf, size_t len)
{
     struct psock *psocket = (struct psock *) ctx;

     PSOCK_READBUF_LEN( psocket, len );
     memcpy( buf, inputbuf, len);
     //TO DO:check how psocket works if read fails to receive len bytes Do we have timeout?
     return len;
}

static
PT_THREAD(handle_connection(struct psock *p))
{
    PSOCK_BEGIN(p);
     while( ( ret = ssl_handshake( &ssl ) ) != 0 )
     {
          if( ret != POLARSSL_ERR_NET_WANT_READ && ret != POLARSSL_ERR_NET_WANT_WRITE )
           {
                printf( " failed\n  ! ssl_handshake returned %d\n\n", ret );
          }
     }
     printf( "ssl handshake ok\n" );

     PSOCK_CLOSE(p);
     PSOCK_END(p);
}

When I compile this code for cooja, I get following compilation error in recv and send function

ssl_server_new.c: In function ârecvâ:
ssl_server_new.c:73:2: error: case label not within a switch statement
ssl_server_new.c: In function âsendâ:
ssl_server_new.c:82:2: error: case label not within a switch statement
make: *** [ssl_server_new.co<http://ssl_server_new.co>] Error 1

Can someone help me to understand what is this error? Why PSOCK_SEND and PSOCK_READBUF_LEN throwing compilation error?

Appreciate your help.

Thanks
Sapana

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