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86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/*
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* Header for the ETX-beaconing module
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* etx_beaconing.h
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*
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* Created on: Feb 26, 2013
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* Author: stephan
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*/
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#ifndef ETX_BEACONING_H_
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#define ETX_BEACONING_H_
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#include "sys/net/sixlowpan/sixlowip.h"
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#define ETX_BEACON_STACKSIZE 4500 //TODO debug stacksize, set for production
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#define ETX_RADIO_STACKSIZE 4500 //TODO debug stacksize, set for production
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#define ETX_UPDT_STACKSIZE 4500 //TODO debug stacksize, set for production
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//[option|length|ipaddr.|packetcount] with up to 15 ipaddr|packetcount pairs
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// 1 Byte 1 Byte 1 Byte 1 Byte
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#define ETX_BUF_SIZE (32)
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#define ETX_RCV_BUFFER_SIZE (128)
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//Constants for packets
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//ETX beaconing type (XXX ATTENTION! this is non-standard)
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#define ETX_BEACON 0x20//Non-standard way of saying this is an etx-pkt.
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//ETX Interval parameters
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#define MS 1000
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/*
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* ETX_INTERVAL
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*
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* Given in ms, the default is 1 second.
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* Should be divisible through 2 (For ETX_DEF_JIT_CORRECT)
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* and 5 (For ETX_MAX_JITTER) unless those values are adjusted too.
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*/
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#define ETX_INTERVAL (1000)
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#define ETX_ROUNDS (10) //10 is the default value
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#define ETX_PKT_HDR_LEN (2) //Option type + Length (1 Byte each)
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#define ETX_TUPLE_SIZE (2) //1 Byte for Addr, 1 Byte for packets rec.
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#define ETX_PKT_REC_OFFSET (ETX_TUPLE_SIZE - 1) //Offset in a tuple of (addr,pkt_rec), will always be the last byte
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#define ETX_IPV6_LAST_BYTE (15) //The last byte for an ipv6 address
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#define ETX_MAX_JITTER (ETX_INTERVAL / 5) //The default value is 20% of ETX_INTERVAL
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#define ETX_JITTER_MOD (ETX_MAX_JITTER + 1) //The modulo value for jitter computation
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#define ETX_DEF_JIT_CORRECT (ETX_MAX_JITTER / 2) //Default Jitter correction value (normally ETX_MAX_JITTER / 2)
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//prototypes
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void etx_init_beaconing(ipv6_addr_t * address);
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void etx_beacon(void);
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double etx_get_metric(ipv6_addr_t * address);
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void etx_update(void);
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void etx_radio(void);
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/*
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* The ETX beaconing packet consists of:
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*
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* 0 1 2
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - -
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* | Option Type | Option Length | Data
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- - - - - - - -
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* Option type: Set to 0x20
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*
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* Option Length: The length of the Data sent with this packet
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*
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* Option Data: 2-Octet Pairs of 8 bit for addresses and a positive integer
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* denoting the amount of packets received from that IP address
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*
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* We only need 1 octet for the ip address since RPL for now only allows for
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* 255 different addresses.
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*
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* If the length of this packet says 0, it has received no other beaconing
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* packets itself so far.
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*/
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typedef struct __attribute__((packed)) {
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uint8_t code;
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uint8_t length;
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uint8_t* data;
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} etx_probe_t;
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#endif /* ETX_BEACONING_H_ */
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