comm.h File Reference

contains data structures and messages used in communication between a peer and the helper More...

#include "def.h"

Go to the source code of this file.

Data Structures
struct	comm_msg_hello
	structure for a COMM_MSG_HELLO message payload More...
struct	comm_msg_pred_port
	structure to hold payload for a COMM_MSG_PORT_PRED message More...
struct	comm_msg_buddy_alloc
	structure to hold payload for a COMM_MSG_BUDDY_ALLOC message More...
struct	comm_msg_buddy_info
	structure to hold payload for a COMM_MSG_BUDDY_INFO message More...
struct	comm_msg_buddy_syn_seq
	structure to hold payload for a COMM_MSG_SYN_TO_BUDDY_SEQ message More...
struct	comm_msg_peer_syn_seq
	structure to hold the COMM_MSG_PEER_SYN_SEQ payload More...
struct	comm_msg_goodbye
	structure to hold the COMM_MSG_GOODBYE payload More...
struct	comm_msg_syn_flooded
	structure to hold the COMM_MSG_SYN_FLOODED payload More...
struct	comm_msg_bday_success_port
	structure to hold the COMM_MSG_BDAY_SUCCESS_PORT payload More...
struct	comm_msg_syn_ack_flood_seq_num
	structure to hold the COMM_MSG_SYN_ACK_FLOOD_SEQ_NUM payload More...
Defines
#define	COMM_TYPE_LEN   4
	the length of the message type field
#define	COMM_LENGTH_LEN   4
	the length of the length field
#define	COMM_MIN_LEN   (COMM_TYPE_LEN + COMM_LENGTH_LEN)
	the minimum comminication length (header size)
#define	COMM_HEADER_LEN   COMM_MIN_LEN
	the length of the header (same as COMM_MIN_LEN)
#define	COMM_MAX_LEN   1024
	the absolute maximum a message (including payload) can be
#define	COMM_MSG_HELLO   0x0001
	an intial message from a peer to helper starting everything (message includes a payload of type comm_peer_info_t)
#define	COMM_MSG_CONNECT_AGAIN   0x1000
	a message from the helper to the peer asking for a second connection to facilitate port prediction
#define	COMM_MSG_CONNECTED_AGAIN   0x0002
	a message from the peer to the helper indicating that a second port prediction connection has been made
#define	COMM_MSG_PORT_PRED   0x1002
	a message from the helper to the peer indicating the success of the first port prediction attempt
#define	COMM_MSG_WAITING_FOR_BUDDY_ALLOC   0x0003
	a message from the peer to the helper indicating the peer is now waiting to get buddy info (this message only exists to maintain the ping/pong message flow)
#define	COMM_MSG_BUDDY_ALLOC   0x1003
	a message from the helper to the peer informing the peer of the the buddy's port alloc method, and whether there is support for the connection
#define	COMM_MSG_WAITING_FOR_BUDDY_PORT   0x0004
	a message from the peer to the helper asking for the buddy's external port
#define	COMM_MSG_BUDDY_PORT   0x1004
	a message from the helper to the peer with info about the buddy
#define	COMM_MSG_BUDDY_SYN_SEQ   0x0005
	message from the peer to the helper with sequence number in the SYN packet sent to the buddy
#define	COMM_MSG_PEER_SYN_SEQ   0x1005
	message from helper to peer relaying the sequence number in the SYN from the buddy that the peer should base a forged SYN/ACK on
#define	COMM_MSG_GOODBYE   0x0006
	a message from the peer to the helper terminating the protocol
#define	COMM_MSG_SYN_FLOODED   0x0101
	a message from the peer to the helper indicating the birthay SYN flood has be done
#define	COMM_MSG_BUDDY_SYN_ACK_FLOODED   0x1101
	a message from the helper to the peer indicating that the buddy has commenced the bday synack flood
#define	COMM_MSG_BDAY_SUCCESS_PORT   0x0102
	a message from the peer to the helper indicating the port that made if through the NAT
#define	COMM_MSG_WAITING_TO_SYN_ACK_FLOOD   0x0201
	a message from the peer to the helper indicating the peer is ready to be told to do a birthday flood
#define	COMM_MSG_SYN_ACK_FLOOD_SEQ_NUM   0x1201
	a message from the helper to the peer with the sequence number that the peer used in the SYN flood
#define	COMM_MSG_SYN_ACK_FLOOD_DONE   0x0202
	a message from the peer to the helper indicating that the synack flood has been completed
#define	COMM_PORT_ALLOC_UNKNOWN   -1
	port allocation method is unknown
#define	COMM_PORT_ALLOC_SEQ   1
	port allocation method is sequential
#define	COMM_PORT_ALLOC_RAND   2
	port allocation method is random
#define	COMM_CONNECTION_UNSUPPORTED   0
	unsupported connection
#define	COMM_CONNECTION_SUPPORTED   1
	supported connection
#define	COMM_BDAY_NOT_NEEDED   0
	birthday paradox not needed for peer
#define	COMM_BDAY_NEEDED   1
	birthday paradox needed for peer
Typedefs
typedef long	comm_type_t
	a typedef for the comm type field
typedef unsigned long	comm_len_t
	a typdef for the comm length field
typedef comm_msg_hello	comm_msg_hello_t
	typedef for the COMM_MSG_HELLO payload structure
typedef comm_msg_pred_port	comm_msg_pred_port_t
	typedef for the COMM_MSG_PORT_PRED payload structure
typedef comm_msg_buddy_alloc	comm_msg_buddy_alloc_t
	typedef for the COMM_MSG_BUDDY_ALLOC payload structure
typedef comm_msg_buddy_info	comm_msg_buddy_port_t
	typedef for the COMM_MSG_BUDDY_PORT payload structure
typedef comm_msg_buddy_syn_seq	comm_msg_buddy_syn_seq_t
	a typedef for the COMM_MSG_BUDDY_SYN_SEQ message
typedef comm_msg_peer_syn_seq	comm_msg_peer_syn_seq_t
	typedef for the COMM_MSG_PEER_SYN_SEQ payload structure
typedef comm_msg_goodbye	comm_msg_goodbye_t
	typedef for the COMM_MSG_GOODBYE structure
typedef comm_msg_syn_flooded	comm_msg_syn_flooded_t
	a typedef for the COMM_MSG_SYN_FLOODED payload structure
typedef comm_msg_bday_success_port	comm_msg_bday_success_port_t
	typedef for the COMM_MSG_BDAY_SUCCESS_PORT payload structure
typedef comm_msg_syn_ack_flood_seq_num	comm_msg_syn_ack_flood_seq_num_t
	typedef for the COMM_MSG_SYN_ACK_FLOOD_SEQ_NUM payload structure
Variables
comm_msg_hello	__packed__
	structure for a COMM_MSG_HELLO message payload

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Detailed Description

contains data structures and messages used in communication between a peer and the helper

Author:

Daniel Ferullo (ferullo@cmu.edu)

Definition in file comm.h.

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