Arguments have to be always checked in the API functions.

The user can provide anything to the LWIP API as argument. There should be checked, particularly argument used as pointer inside the functions.

Exemple in Lwip_PBuf.c:
size_t
LwIP_Buf_GetTotalLength(LWIP_PBUF_H hPBuf)
{
return hPBuf->tot_len;
}
Furthermore, the hPBuf argument is verified in other functions of this module. The behavior has to be consistent.