diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/dgram.h | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/src/include/dgram.h b/src/include/dgram.h index 31f7c03..779c7ef 100644 --- a/src/include/dgram.h +++ b/src/include/dgram.h @@ -42,6 +42,7 @@ typedef tx_len_t rx_len_t; * * @length: Packet length in bytes * @reserved: Reserved for future use + * @type: Describes the type of packet (see OTYPE_*) * @reserved1: Reserved for future use * @port: Datagram port number to send on * @crc32: CRC32 checksum of data + header @@ -49,12 +50,31 @@ typedef tx_len_t rx_len_t; struct onet_dgram { uint16_t length; uint16_t reserved; - uint16_t reserved1; + uint8_t type : 3; + uint16_t reserved1 : 13; uint8_t port; uint32_t crc32; } __attribute__((packed)); /* + * ONET packet types + * + * @OTYPE_DATA: Regular data to be sent + * @OTYPE_SQUEAK: For peer discovery + * + * [ALL OTHER VALUES ARE RESERVED] + * + * -- Squeaks -- + * + * A machine may squeak at the wire and those whom the squeak is + * intended for shall squeak back. One thing to be aware of is that + * this may allow squeak storms / attacks where a machine continuously + * squeaks at a wire. + */ +#define OTYPE_DATA 0x0 +#define OTYPE_SQUEAK 0x1 + +/* * Get the total length of a datagram including * the length of the ethernet header and the header * of the datagram itself. @@ -81,12 +101,16 @@ struct onet_dgram { * * @length: Length of a packet to send * @port: Port number to send on + * @type: Packet type (OTYPE_*) * @res: Result is written here * * Returns zero on success, otherwise a less than zero * value on failure. */ -int dgram_load(uint16_t length, uint8_t port, struct onet_dgram *res); +int dgram_load( + uint16_t length, uint8_t port, + uint8_t type, struct onet_dgram *res +); /* * Send a datagram through ONET @@ -105,6 +129,17 @@ tx_len_t dgram_send( ); /* + * Send a squeak through a wire + * + * @link: Link to squeak through + * @dst: Destination address to squeak at + * + * Returns the length of the squeak on success, otherwise + * a less than zero value on failure. + */ +tx_len_t dgram_squeak(struct onet_link *link, mac_addr_t dst); + +/* * Get data from an ONET link * * @link: The ONET link to recv data from |