Removed Demo/dns -- see sf.net/projects/pydns/ instead.

Demo/dns/README

-This directory contains a module (dnslib) that implements a DNS
-(Domain Name Server) client, plus additional modules that define some
-symbolic constants used by DNS (dnstype, dnsclass, dnsopcode).
-
-Type "python dnslib.py -/" for a usage message.
-
-You can also import dnslib and write your own, more sophisticated
-client code; use the test program as an example (there is currently no
-documentation :-).
-
-NOTE: This code has been evolved into a much more enhanced package by
-Anthony Baxter; see the pydns project at SourceForge:
-
-    http://sourceforge.net/projects/pydns/

Demo/dns/asgethost.py

-import sys
-import dnslib
-import dnstype
-import dnsopcode
-import dnsclass
-import socket
-import select
-
-def main():
-    server = 'cnri.reston.va.us'        # How?
-    port = 53
-    opcode = dnsopcode.QUERY
-    rd = 0
-    qtype = dnstype.MX
-    qname = sys.argv[1:] and sys.argv[1] or 'www.python.org'
-    m = dnslib.Mpacker()
-    m.addHeader(0,
-                0, opcode, 0, 0, rd, 0, 0, 0,
-                1, 0, 0, 0)
-    m.addQuestion(qname, qtype, dnsclass.IN)
-    request = m.getbuf()
-    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
-    s.connect((server, port))
-    s.send(request)
-    while 1:
-        r, w, x = [s], [], []
-        r, w, x = select.select(r, w, x, 0.333)
-        print r, w, x
-        if r:
-            reply = s.recv(1024)
-            u = dnslib.Munpacker(reply)
-            dnslib.dumpM(u)
-            break
-
-main()

Demo/dns/dnsclass.py

-# CLASS values (section 3.2.4)
-
-IN = 1		# the Internet
-CS = 2		# the CSNET class (Obsolete - used only for examples in
-		# some obsolete RFCs)
-CH = 3		# the CHAOS class
-HS = 4		# Hesiod [Dyer 87]
-
-# QCLASS values (section 3.2.5)
-
-ANY = 255	# any class
-
-
-# Construct reverse mapping dictionary
-
-_names = dir()
-classmap = {}
-for _name in _names:
-	if _name[0] != '_': classmap[eval(_name)] = _name
-
-def classstr(klass):
-	if classmap.has_key(klass): return classmap[klass]
-	else: return `klass`

Demo/dns/dnsopcode.py

-# Opcode values in message header (section 4.1.1)
-
-QUERY = 0
-IQUERY = 1
-STATUS = 2
-
-# Construct reverse mapping dictionary
-
-_names = dir()
-opcodemap = {}
-for _name in _names:
-	if _name[0] != '_': opcodemap[eval(_name)] = _name
-
-def opcodestr(opcode):
-	if opcodemap.has_key(opcode): return opcodemap[opcode]
-	else: return `opcode`

Demo/dns/dnstype.py

-# TYPE values (section 3.2.2)
-
-A = 1		# a host address
-NS = 2		# an authoritative name server
-MD = 3		# a mail destination (Obsolete - use MX)
-MF = 4		# a mail forwarder (Obsolete - use MX)
-CNAME = 5	# the canonical name for an alias
-SOA = 6		# marks the start of a zone of authority
-MB = 7		# a mailbox domain name (EXPERIMENTAL)
-MG = 8		# a mail group member (EXPERIMENTAL)
-MR = 9		# a mail rename domain name (EXPERIMENTAL)
-NULL = 10	# a null RR (EXPERIMENTAL)
-WKS = 11	# a well known service description
-PTR = 12	# a domain name pointer
-HINFO = 13	# host information
-MINFO = 14	# mailbox or mail list information
-MX = 15		# mail exchange
-TXT = 16	# text strings
-
-# Additional TYPE values from host.c source
-
-UNAME = 110
-MP = 240
-
-# QTYPE values (section 3.2.3)
-
-AXFR = 252	# A request for a transfer of an entire zone
-MAILB = 253	# A request for mailbox-related records (MB, MG or MR)
-MAILA = 254	# A request for mail agent RRs (Obsolete - see MX)
-ANY = 255	# A request for all records
-
-# Construct reverse mapping dictionary
-
-_names = dir()
-typemap = {}
-for _name in _names:
-	if _name[0] != '_': typemap[eval(_name)] = _name
-
-def typestr(type):
-	if typemap.has_key(type): return typemap[type]
-	else: return `type`