new IPPort class

mmgen/obj.py

@@ -20,7 +20,7 @@
 obj.py: MMGen native classes
 """
 
-import sys,os,unicodedata
+import sys,os,re,unicodedata
 from decimal import *
 from string import hexdigits,ascii_letters,digits
 
@@ -913,6 +913,33 @@ class SeedSplitSpecifier(str,Hilite,InitErrors,MMGenObject):
 class SeedSplitIDString(MMGenPWIDString):
 	desc = 'seed split ID string'
 
+class IPPort(str,Hilite,InitErrors,MMGenObject):
+	color = 'yellow'
+	width = 0
+	trunc_ok = False
+	min_len = 9  # 0.0.0.0:0
+	max_len = 21 # 255.255.255.255:65535
+	def __new__(cls,s):
+		if type(s) == cls:
+			return s
+		try:
+			m = re.fullmatch('{q}\.{q}\.{q}\.{q}:(\d{{1,10}})'.format(q=r'([0-9]{1,3})'),s)
+			assert m is not None, f'{s!r}: invalid IP:HOST specifier'
+			for e in m.groups():
+				if len(e) != 1 and e[0] == '0':
+					die(2,f'{e}: leading zeroes not permitted in dotted decimal element or port number')
+			res = [int(e) for e in m.groups()]
+			for e in res[:4]:
+				assert e <= 255, f'{e}: dotted decimal element > 255'
+			assert res[4] <= 65535, f'{res[4]}: port number > 65535'
+			me = str.__new__(cls,s)
+			me.ip = '{}.{}.{}.{}'.format(*res)
+			me.ip_num = sum( res[i] * ( 2 ** (-(i-3)*8) ) for i in range(4) )
+			me.port = res[4]
+			return me
+		except Exception as e:
+			return cls.init_fail(e,s)
+
 from collections import namedtuple
 ati = namedtuple('addrtype_info',
 	['name','pubkey_type','compressed','gen_method','addr_fmt','wif_label','extra_attrs','desc'])

test/objtest_py_d/ot_btc_mainnet.py

@@ -330,4 +330,32 @@ tests = {
 			('1:2','2:2','alice:2:2','αβ:2:2','1:'+ssm,ssm+':'+ssm)
 		)
 	},
+	'IPPort': {
+		'arg1': 's',
+		'bad': (
+			'.0.0.0:0',
+			'127.0.0.1',
+			'127.0.0.1:',
+			'20',
+			':20',
+			'127.0.0.256:0',
+			'127.0.0.1:65536',
+			'127.0.0.01:60000',
+			'0.0.0.0:00',
+		),
+		'good': (
+			(
+				'0.0.0.0:0',
+				'0.0.0.1:0',
+				'0.0.1.0:0',
+				'0.0.1.1:0',
+				'0.1.0.0:0',
+				'1.0.0.0:0',
+				'10.0.0.1:0',
+				'127.0.0.1:65535',
+				'255.0.0.0:400',
+				'255.255.255.255:65535',
+			)
+		)
+	},
 }