def type_five_bad(self):
'''
Send a malformed type 5 message.
'''
m5 = ais.MsgType5()
s5 = ais.Sentence(m5)
[s_p1, s_p2] = s5.get_sentences()
eng = self.INVALID_SENTENCE
if self.chance(self.FAIL_CHANCE): # invaild part 1
# bad checksum
if self.chance(self.FAIL_CHANCE):
cs = s_p1[-2:]
cs = int(cs, 16) + 1
cs = '{0:0>2}'.format(hex(cs)[2:].upper())
s_p1 = "{0}{1}".format(s_p1[:-2], cs)
# invalid msg
elif self.chance(self.FAIL_CHANCE):
s_p1 = s_p1[15:]
# invalid start chars
else:
rest = s_p1[6:]
s_p1 = "{0}{1}".format(sp.random_alpha(3,5), rest)
self.write("{0}\x07".format(s_p1))
self.read(length=len(eng), expect=eng)
else: # invalid part 2
# bad checksum
if self.chance(self.FAIL_CHANCE):
cs = s_p2[-2:]
cs = int(cs, 16) + 1
cs = '{0:0>2}'.format(hex(cs)[2:].upper())
s_p2 = "{0}{1}".format(s_p2[:-2], cs)
# invalid msg
elif self.chance(self.FAIL_CHANCE):
s_p2 = s_p2[15:]
# invalid start chars
else:
rest = s_p2[6:]
s_p2 = "{0}{1}".format(sp.random_alpha(3,5), rest)
self.write("{0}\x07".format(s_p1))
self.read(length=len(self.PARTIAL_MSG), expect=self.PARTIAL_MSG)
self.write("{0}\x07".format(s_p2))
self.read(length=len(eng), expect=eng)
def type_four_bad(self):
'''
Send a malformed type 4 message.
'''
m4 = ais.MsgType4()
s4 = ais.Sentence(m4)
[s] = s4.get_sentences()
eng = self.INVALID_SENTENCE
# bad checksum
if self.chance(self.FAIL_CHANCE):
cs = s[-2:]
cs = int(cs, 16) + 1
cs = '{0:0>2}'.format(hex(cs)[2:].upper())
s = "{0}{1}".format(s[:-2], cs)
# invalid msg
elif self.chance(self.FAIL_CHANCE):
s = s[15:]
# invalid start chars
else:
rest = s[6:]
s = "{0}{1}".format(sp.random_alpha(3,6), rest)
self.write("{0}\x07".format(s))
self.read(length=len(eng), expect=eng)
def _get_content(self):
all_chars = [chr(x) for x in range(128)]
all_chars.remove(self.TERM)
result = ''
b_len = randint(5, self.INBUFSZ - 1) #TERM is added at the end.
remaining = b_len
while 0 < remaining:
if self.chance(0.7):
result += sp.random_alpha(0,
10 if remaining > 10 else remaining)
elif self.chance(0.3):
result += sp.random_digits(0,
10 if remaining > 10 else remaining)
else:
result += ''.join(
choice(all_chars)
for _ in range(0, 10 if remaining > 10 else remaining))
if len(result) >= b_len:
break
if self.chance(0.7):
result += ' '
else:
result += '.'
if self.chance(0.1):
result += '\n'
remaining = b_len - len(result)
if True == self.DEBUG_CONTENT:
result = "Bob's discount randumb stor-E gener8r for only $12.99. Come on in.\nGet your storie today!\n"
if True == DEBUG:
r = '\\'.join(hex(ord(c)) for c in result)
print "result hex: {0}".format(r)
print "result: {0}".format(result)
return result
def _get_content(self):
all_chars = [chr(x) for x in range(128)]
all_chars.remove(self.TERM)
result = ""
b_len = randint(5, self.INBUFSZ - 1) # TERM is added at the end.
remaining = b_len
while 0 < remaining:
if self.chance(0.7):
result += sp.random_alpha(0, 10 if remaining > 10 else remaining)
elif self.chance(0.3):
result += sp.random_digits(0, 10 if remaining > 10 else remaining)
else:
result += "".join(choice(all_chars) for _ in range(0, 10 if remaining > 10 else remaining))
if len(result) >= b_len:
break
if self.chance(0.7):
result += " "
else:
result += "."
if self.chance(0.1):
result += "\n"
remaining = b_len - len(result)
if True == self.DEBUG_CONTENT:
result = "Bob's discount randumb stor-E gener8r for only $12.99. Come on in.\nGet your storie today!\n"
if True == DEBUG:
r = "\\".join(hex(ord(c)) for c in result)
print "result hex: {0}".format(r)
print "result: {0}".format(result)
return result