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...
...
...
#define NX_SOURCE_CODE
#include "nx_api.h"
#include "nx_ip.h"
#include "nx_udp.h"
...
...
UINT _nxe_udp_source_extract(NX_PACKET *packet_ptr, ULONG *ip_address, UINT *port)
{
#ifndef NX_DISABLE_IPV4
UINT status;
if ((packet_ptr == NX_NULL) || (ip_address == NX_NULL) || (port == NX_NULL))
{
return(NX_PTR_ERROR);
}if ((packet_ptr == NX_NULL) || (ip_address == NX_NULL) || (port == NX_NULL)) { ... }
if (packet_ptr -> nx_packet_ip_header == NX_NULL)
{
return(NX_INVALID_PACKET);
}if (packet_ptr -> nx_packet_ip_header == NX_NULL) { ... }
if (packet_ptr -> nx_packet_ip_version != NX_IP_VERSION_V4)
{
return(NX_INVALID_PACKET);
}if (packet_ptr -> nx_packet_ip_version != NX_IP_VERSION_V4) { ... }
if ((UINT)(packet_ptr -> nx_packet_prepend_ptr - packet_ptr -> nx_packet_data_start) <
(sizeof(NX_UDP_HEADER) + sizeof(NX_IPV4_HEADER)))
{
return(NX_INVALID_PACKET);
}if ((UINT)(packet_ptr -> nx_packet_prepend_ptr - packet_ptr -> nx_packet_data_start) < (sizeof(NX_UDP_HEADER) + sizeof(NX_IPV4_HEADER))) { ... }
status = _nx_udp_source_extract(packet_ptr, ip_address, port);
return(status);/* ... */
#else
NX_PARAMETER_NOT_USED(packet_ptr);
NX_PARAMETER_NOT_USED(ip_address);
NX_PARAMETER_NOT_USED(port);
return(NX_NOT_SUPPORTED);/* ... */
#endif
}{ ... }