test cases for invalid telegrams
- too short fixed data length (invalid_length2.hex)
- premature end of record at data (premature_end_of_data1.hex,
premature_end_of_data2.hex)
- premature end of record at DIF (premature_end_of_dif1.hex,
premature_end_of_dif2.hex)
- premature end of record at variable length VIF
(premature_end_of_var_vif1.hex)
- premature end of record at VIF (premature_end_of_vif1.hex)
- too long variable length VIF (too_long_var_vif.hex)
- too many DIFE (too_many_dife.hex)
- too many VIFE (too_many_vife.hex)
- too short variable header (too_short_header.hex)
Improve data parsing
- add length defines for variable data header and fixed data
- add size check for fixed data
- avoid problems with memory alignment / padding in mbus structures
(improve portability)
- abort parsing if there are too many DIFE or VIFEs
- check for premature end of variable data
- check size of variable length VIF
Merge pull request #51 from lategoodbye/master

Improve data parsing