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Hi,

see my comments in-line.

Best regards
Michael

On Mar 20, 2005, at 8:43 Uhr, amar deka wrote:

hi all

I tried to modify the "SCTP_message" structute in
messages.h
by
typedef struct SCTP_MESSAGE
{
SCTP_common_header common_header;
guchar sctp_pdu[MAX_SCTP_PDU];
guchar my_data[MY_DATA_SIZE];
}
SCTP_message;

This is not a valid SCTP packet. Therefore none of the
internal routines will be prepared to handle it.

so that i can add some data to the SCTP message
calculated over the original message.
then i tried to modify
mdi_send_message() in distribution.c by adding
..
..
char data[MY_DATA_SIZE]="skkkksjsij........";
.
.
memcpy(message->my_data,data,MY_DATA_SIZE);

..
before the line
aux_insert_checksum((unsigned char *) message,
length);

...
then i tried to receive the message->mydata from

mdi_receiveMessage()

in a char buffer by
buffer=(char*)message->my_data;
and tried to print it.
all i get is a garbage.

what may be the problem?

See above.

Another question ...
if i have to add a new control chunk and manipulate it

It depends on the control chunk. If some of the existing control
chunks is similar to your new one, try to figure out how it is
handled in the sctplib.

what steps should i follow??
SOS plz
amar



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• [SCTP-Discussion] modifying SCTP_message structure, amar deka, 03/20/2005
  • Re: [SCTP-Discussion] modifying SCTP_message structure, Michael Tuexen, 03/20/2005

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