How to Built your own UDP Packet of lets say 524 bytes?

[raghaw]

Hello everybody,
Is there any way i can built my own UDP Packet of any size and then transmit it over the network?

[Banfa]

1. Open a UDP Socket to the destination (preferably one that is listening for incoming UDP packets).
2. Put your data in a buffer of usigned char
3. Send it
4. Close your link if you have nothing else to send

[raghaw]

ok lets say i have a structure

struct Msg_42
{
Msg_42();//constructor
U32 Vehicle_ID;
U32 CUCS_ID;
U8 Flight_Path_Control_Mode;
};
with a header structure

struct STANAG_Message_Header
{
U8 IDD [10];
U16 Mesasge_Instance_Identifier;
U16 Message_Type;
U32 Message_Length;
S16 Stream_ID;
};


and

final message

struct STANAG_Message
{
struct STANAG_Message_Header st_mh;
char * Message_Data;
U32 checksum;
};


then how tio put this into a UDP Packet

[Banfa]

Like I said you just open a connection to a UDP socket and send the data you want to in the packet in a single function call (that will mean putting all the data into a single buffer) to send (assuming you are using Berkley sockets or an implementation thereof).

The network layer will handle the nitty gritty of creating the UDP packet headers.