Re: [lwip-users] tcp_connect hangs

[Carl D. Blake]

Never mind.  I discovered my stupid mistake.  I was not allocating
enough memory for my state structure (lpr_state_info vs.
*lpr_state_info).  Sorry.

On Wed, 2006-12-20 at 09:49, Carl D. Blake wrote:
> I'm using lwip with rawapi.  I've successfully got a listen to work with
> the system.  However, when I attempt to connect to another computer the
> call to tcp_connect hangs.  No callbacks are called and the entire
> system stops.  The code sequence is:
> 
> {
>     struct ip_addr ipa;
>     int ret = 0;
>     err_t err;
> 
>     lpr_state_info = mem_malloc( sizeof( lpr_state_info ) );
>     if( lpr_state_info != NULL ) {
>       lpr_state_info->tpp = tcp_new();
>       if( lpr_state_info->tpp != NULL ) {
>           err = tcp_bind( lpr_state_info->tpp, IP_ADDR_ANY, 731 );
>           if( err == ERR_OK ) {
>               IP4_ADDR( &ipa, 10, 0, 1, 168 );
>               err = tcp_connect( lpr_state_info->tpp,  &ipa, 10001, 
> connect_cb );
>               if( err != ERR_OK ) {
>                   mem_free( lpr_state_info );
>                   lpr_state_info = NULL;
>                   ret = -1;
>               }
>           } else {
>               mem_free( lpr_state_info );
>               lpr_state_info = NULL;
>               ret = -1;
>           }
>       } else {
>           mem_free( lpr_state_info );
>           lpr_state_info = NULL;
>           ret = -1;
>       }
>     } else {
>       ret = -1;
>     }
> 
>     return ret;
> }
> 
> I am running this on a FreeScale MPC8271 processor (big endian).  My
> lwipopts.h file is:
> 
> #ifndef __LWIPOPTS_H__
> #define __LWIPOPTS_H__
> 
> /* #define LWIP_DEBUG */
> /* #define TCP_DEBUG  DBG_ON */
> 
> #define NO_SYS                        1
> #define LWIP_CALLBACK_API     1
> 
> /* ---------- Memory options ---------- */
> /* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
>    lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
>    byte alignment -> define MEM_ALIGNMENT to 2. */
> /* tried 4 byte alignment, but that seems to cause problems with pbuf
>  * routines */
> #define MEM_ALIGNMENT           4
> 
> /* MEM_SIZE: the size of the heap memory. If the application will send
> a lot of data that needs to be copied, this should be set high. */
> #define MEM_SIZE                100 * 1024
> 
> /* The following four are used only with the sequential API and can be
>    set to 0 if the application only will use the raw API. */
> /* MEMP_NUM_NETBUF: the number of struct netbufs. */
> #define MEMP_NUM_NETBUF         0
> /* MEMP_NUM_NETCONN: the number of struct netconns. */
> #define MEMP_NUM_NETCONN        0
> /* MEMP_NUM_APIMSG: the number of struct api_msg, used for
>    communication between the TCP/IP stack and the sequential
>    programs. */
> #define MEMP_NUM_API_MSG        0
> /* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
>    for sequential API communication and incoming packets. Used in
>    src/api/tcpip.c. */
> #define MEMP_NUM_TCPIP_MSG      0
> 
> #define PBUF_POLL_SIZE                30
> #define PBUF_POOL_BUFSIZE     1536
> #define PBUF_LINK_HLEN                16
> 
> #define TCP_MSS                       1476
> #define TCP_SND_BUF           (30 * 1024)
> #define TCP_WND                       (16 * 1024)
> 
> #endif /* __LWIPOPTS_H__ */
> 
> 
> 
> 
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