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cper_parser.py
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cper_parser.py
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import re
def byte_parse(str):
split_text = re.split("(..)", str)
split_text = split_text[1::2]
split_text.reverse()
return "".join(split_text)
def bcd_parser(bcd):
century = str(int(bcd[-2:], 16))
year = str(int(bcd[-4:-2], 16))
month = str(int(bcd[-6:-4], 16))
day = str(int(bcd[-8:-6], 16))
hour = str(int(bcd[-12:-10], 16))
minite = str(int(bcd[-14:-12], 16))
sec = str(int(bcd[-16:-14], 16))
date = century year "/" month "/" day " " hour ":" minite ":" sec " (UTC)"
return date
def severity(sev):
sev = byte_parse(sev)
if sev == "00000000":
sev_str = f"Recoverable)"
elif sev == "00000001":
sev_str = f"Fatal"
elif sev == "00000002":
sev_str = f"Corrected"
elif sev == "00000003":
sev_str = f"Informational"
else:
sev_str = "Unknown severity"
return sev_str
def validbits_parser(valid_bits):
vb_bin = f"{int(valid_bits, 16):0>32b}"
valids = []
if vb_bin[-1]=="1":
valids.append("Platform ID")
if vb_bin[-2]=="1":
valids.append("Timestamp")
if vb_bin[-3]=="1":
valids.append("Partition ID")
return "Valid values in: " ", ".join(valids)
print("CPER Raw data parser\n")
raw = input("CPER Raw data: ")
sig_start = raw[0:8] # 4
revision = byte_parse(raw[8:12]) # 2
sig_end = raw[12:20] # 4
sec_cnt = int(byte_parse(raw[20:24])) # 2
err_sev = raw[24:32] # 4
valid_bits = byte_parse(raw[32:40]) # 4
rec_len = raw[40:48] # 4
timestmp = raw[48:64] # 8
pf_id = raw[64:96] # 16
part_id = raw[96:128] # 16
crea_id = raw[128:160] # 16
notif_type = raw[160:192] # 16
rec_id = raw[192:208] # 8
flags = byte_parse(raw[208:216]) # 4
persis_info = raw[216:232] # 8
resv = raw[232:256] # 12
sec_desc_list = []
for i in range(sec_cnt):
start = 256 i*144
end = start 144
sec_desc_list.append(raw[start:end])
def sec_parser(sec_desc):
sec_off = int(byte_parse(sec_desc[0:8]), 16) # 4
sec_len = int(byte_parse(sec_desc[8:16]), 16) # 4
sec_rev = sec_desc[16:20] # 2
sec_valid = sec_desc[20:22] # 1
sec_resv = sec_desc[22:24] # 2
sec_flags = sec_desc[24:32] # 4
sec_type = sec_desc[32:64] # 16
fru_id = sec_desc[64:96] # 16
sec_sev = sec_desc[96:104] # 8
fru_txt = sec_desc[104:144] # 20
fru_txt_ascii = bytearray.fromhex(fru_txt).decode()
content = raw[sec_off*2:(sec_off sec_len)*2]
section = \
"- Section Offset : " str(sec_off) "\n" \
"- Section Length : " str(sec_len) "\n" \
"- Section Revision : " sec_rev "\n" \
"- Section ValidBit : " sec_valid "\n" \
"- Reserved [ZERO] : " sec_resv "\n" \
"- Flags : " sec_flags "\n" \
"- Section Types : " sec_type "\n" \
"- FRU Id : " fru_id "\n" \
"- Section Severity : " severity(sec_sev) "\n" \
"- FRU Text (Hex) : " fru_txt "\n" \
"- FRU Text (Ascii) : " fru_txt_ascii "\n\n" \
"- Section Content : " content
return section
rec_header = \
"- Signature Start : " sig_start " (" bytearray.fromhex(sig_start).decode() ")" "\n" \
"- Revision : " byte_parse(revision) "\n" \
"- Signature End : " sig_end "\n" \
"- Section Count : " str(sec_cnt) "\n" \
"- Error Severity : " severity(err_sev) "\n" \
"- Validation Bits : " validbits_parser(valid_bits) "\n" \
"- Record Length : " str(int(byte_parse(rec_len), 16)) "\n" \
"- Timestamp : " bcd_parser(timestmp) "\n" \
"- Platform ID : " pf_id "\n" \
"- Partition ID : " part_id "\n" \
"- Creator ID : " crea_id "\n" \
"- Notification Type : " notif_type "\n" \
"- Record ID : " rec_id "\n" \
"- Flags : " flags "\n" \
"- Persistence Info : " persis_info "\n" \
"- Reserved [ZERO] : " resv "\n"
print("\n####################")
print("CPER Parse result")
print("\nRaw data length: " str(int(len(raw)/2)))
print("####################\n")
print("\n###################")
print("[Record Header]")
print("###################")
print(rec_header)
print("\n#########################")
print("[Sections]")
print("#########################")
for sec_desc in sec_desc_list:
num = sec_desc_list.index(sec_desc)
print(f"[Section {num}]")
print(sec_parser(sec_desc))
print("\n\n")
# print("Section 1 (Raw) :\n" raw[400:])
# print("\nPartial parse result:")
# print("Section 1 (Ascii):\n" bytearray.fromhex(raw[-40:]).decode())