Repository : ssh://git@open-mesh.org/batctl
On branch : master
commit c888a6284d269924e6895e2509bac62a5b6012bb Author: Martin Hundebøll martin@hundeboll.net Date: Thu May 23 16:53:02 2013 +0200
batctl: Receive fragmented packets and merge
Fragments arriving at their destination are buffered for later merge. Merged packets are passed to the main receive function as had they never been fragmented.
Fragments are forwarded without merging if the MTU of the outgoing interface is smaller than the size of the merged packet.
Signed-off-by: Martin Hundebøll martin@hundeboll.net Signed-off-by: Marek Lindner lindner_marek@yahoo.de
c888a6284d269924e6895e2509bac62a5b6012bb packet.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/packet.h b/packet.h index 96b8e57..2a73ebd 100644 --- a/packet.h +++ b/packet.h @@ -249,6 +249,33 @@ struct batadv_unicast_4addr_packet { */ };
+/** + * struct batadv_frag_packet - fragmented packet + * @header: common batman packet header with type, compatversion, and ttl + * @dest: final destination used when routing fragments + * @orig: originator of the fragment used when merging the packet + * @no: fragment number within this sequence + * @reserved: reserved byte for alignment + * @seqno: sequence identification + * @total_size: size of the merged packet + */ +struct batadv_frag_packet { + struct batadv_header header; +#if defined(__BIG_ENDIAN_BITFIELD) + uint8_t no:4; + uint8_t reserved:4; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + uint8_t reserved:4; + uint8_t no:4; +#else +#error "unknown bitfield endianess" +#endif + uint8_t dest[ETH_ALEN]; + uint8_t orig[ETH_ALEN]; + __be16 seqno; + __be16 total_size; +}; + struct batadv_bcast_packet { struct batadv_header header; uint8_t reserved;