I am trying to use a 6lowpan protocol over the ieee 802.15.4.
With the dongle sniffer and WireShark i saw the packet "in the air" but the coordinator doesn't receive it correctly.
It receive the first part of the packet that is the header of 802.15.4 correctly but the 6lowpan header and the payload(sensor data) are random value. Also after the first 5 packet the end device stop transmitting data.
My question is simple, witch is the problem?
If the packet is longer than the standard the coordinator's buffer is not enough?
This is my code, we fill the packet with a function that return the pointer to the 6lowpan struct. I fill the fields with default value. But I think that the error is in the coordinator source code because the packet is correctly formed.
typedef struct pkt_6LowPan_t
{
/*Header Ipv6*/
uint8_t dispatch; /*Byte iniziale 6LP normalmente vale 01000001 per uncompressed ipv6*/
uint8_t version_traffic_flow[4]; /*Version traffic e flow label*/
uint8_t payload_len[2]; /*lunghezza pacchetto*/
uint8_t next_header; /*tipo header successivo*/
uint8_t hop_limit; /*numero di hop massimi (serve nel routing)*/
/*Indirizzi*/
long int srcdestaddress[8];
/*Data*/
//uint8_t p6Msdu[8];
} pkt6LowPan_t; /*definizione del puntatore all'inizio del pacchetto, inizializzato a null*/
/*--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
//-----------------------------------------------------------------------------------
// Type: gMcpsDataInd_c,
typedef struct mcpsDataInd_tag {
uint8_t dstAddr[8]; // First 0/2/8 bytes is the address as defined by dstAddrMode
uint8_t dstPanId[2]; // 16 bit word converted to little endian byte array
uint8_t dstAddrMode;
uint8_t srcAddr[8]; // First 0/2/8 bytes is the address as defined by srcAddrMode
uint8_t srcPanId[2]; // 16 bit word converted to little endian byte array
uint8_t srcAddrMode;
uint8_t msduLength; // 0-102 (101?)
uint8_t mpduLinkQuality;
bool_t securityUse;
uint8_t aclEntry;
pkt6LowPan_t p6LowPan;
uint8_t *pMsdu; // Data will start at this address inside the message.
} mcpsDataInd_t;
Thanks to all.
