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import ldns
import sys
if len(sys.argv) <= 1:
print("Usage: %s zone_file" % sys.argv[0])
sys.exit()
inp = open(sys.argv[1],"r");
# variables that preserve the parsers state
my_ttl = 3600;
my_origin = None
my_prev = None
# additional state variables
last_pos = 0
line_nr = 0
while True:
ret = ldns.ldns_rr_new_frm_fp_l_(inp, my_ttl, my_origin, my_prev)
s, rr, line_inc, new_ttl, new_origin, new_prev = ret # unpack the result
line_nr += line_inc # increase number of parsed lines
my_prev = new_prev # update ref to previous owner
if s == ldns.LDNS_STATUS_SYNTAX_TTL:
my_ttl = new_ttl # update default TTL
print("$TTL:", my_ttl)
elif s == ldns.LDNS_STATUS_SYNTAX_ORIGIN:
my_origin = new_origin # update reference to origin
print("$ORIGIN:", my_origin)
elif s == ldns.LDNS_STATUS_SYNTAX_EMPTY:
if last_pos == inp.tell():
break # no advance since last read - EOF
last_pos = inp.tell()
elif s != ldns.LDNS_STATUS_OK:
print("! parse error in line", line_nr)
else:
# we are sure to have LDNS_STATUS_OK
print(rr)
inp.close()
print("--------------------")
print("Read %d lines" % line_nr)
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