Re: [Lksctp-developers] SCTP Packet Header

[Aaron R. <ar...@cl...>]

Sorry,

I found it in:  include/linux/sctp.h, though I'm still curious why
checksum isn't defined in the structure in my previous email.

Thanks,

Aaron

typedef struct sctphdr {
   __be16 source;
   __be16 dest;
   __be32 vtag;
   __le32 checksum;
} __packed sctp_sctphdr_t;



On Tue, Aug 2, 2011 at 1:07 PM, Aaron Rosen <ar...@cl...> wrote:
> Hello,
>
> I'm trying to figure out where in the linux source code is the packet
> header defined.
>
> I've found (below) in include/net/sctp/structs.h but I'm confused why
> there is no _u32 checksum after vtag as specified here:
> http://www.ietf.org/rfc/rfc2960.txt
>
> Thanks,
>
> Aaron
>
> struct sctp_packet {
>   /* These are the SCTP header values (host order) for the packet. */
>   __u16 source_port;
>   __u16 destination_port;
>   __u32 vtag;
>
>   /* This contains the payload chunks.  */
>   struct list_head chunk_list;
>
>   /* This is the overhead of the sctp and ip headers. */
>   size_t overhead;
>   /* This is the total size of all chunks INCLUDING padding.  */
>   size_t size;
>
>   /* The packet is destined for this transport address.
>    * The function we finally use to pass down to the next lower
>    * layer lives in the transport structure.
>    */
>   struct sctp_transport *transport;
>
>   /* pointer to the auth chunk for this packet */
>   struct sctp_chunk *auth;
>
>   u8  has_cookie_echo:1,  /* This packet contains a COOKIE-ECHO chunk. */
>       has_sack:1,      /* This packet contains a SACK chunk. */
>       has_auth:1,      /* This packet contains an AUTH chunk */
>       has_data:1,      /* This packet contains at least 1 DATA chunk */
>       ipfragok:1,      /* So let ip fragment this packet */
>       malloced:1;      /* Is it malloced? */
> };
>
>
>
> --
> Aaron O. Rosen
> Masters Student - Network Communication
> 306B Fluor Daniel
>



-- 
Aaron O. Rosen
Masters Student - Network Communication
306B Fluor Daniel