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Factor out some clutter in dnsbl.lua

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The constructor for DNS blacklist service objects was identical in every
case. Factoring it out will reduce errors and complexity.
This commit is contained in:
dmiller
2014-02-10 19:39:07 +00:00
parent 4ea4977a37
commit 4e7e7c04f0
1 changed files with 32 additions and 115 deletions
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147
nselib/dnsbl.lua
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@@ -29,6 +29,20 @@ local table = require "table"
_ENV = stdnse.module("dnsbl", stdnse.seeall)
-- Creates a new Service instance
-- @param ip host that needs to be checked
-- @param mode string (short|long) specifying whether short or long
-- results are to be returned
-- @param config service configuration in case this service provider
-- needs user supplied configuration
-- @return o instance of Helper
local function service_new (self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end
-- The services table contains a list of valid DNSBL providers
-- Providers are categorized in categories that should contain services that
-- do DNS blacklist checks for that particular category.
@@ -80,19 +94,7 @@ SERVICES = {
["short"] = "A",
["long"] = "TXT",
},
-- Creates a new Service instance
-- @param ip host that needs to be checked
-- @param mode string (short|long) specifying whether short or long
-- results are to be returned
-- @param config service configuration in case this service provider
-- needs user supplied configuration
-- @return o instance of Helper
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
-- Sample fmt_query function, if no function is specified, the library
-- will assume that the IP should be reversed add suffixed with the
-- service name.
@@ -118,24 +120,14 @@ SERVICES = {
ns_type = {
["short"] = "A"
},
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
return ( r[1] == "127.0.0.6" and { state = "SPAM" } )
end,
},
["bl.nszones.com"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.2"] = "SPAM",
@@ -146,12 +138,7 @@ SERVICES = {
},
["all.spamrats.com"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.36"] = "DYNAMIC",
@@ -162,12 +149,7 @@ SERVICES = {
},
["list.quorum.to"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
-- this service appears to return 127.0.0.0 when the service is
-- "blocked because it has never been seen to send mail".
@@ -178,12 +160,7 @@ SERVICES = {
},
["sbl.spamhaus.org"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.2"] = "SPAM",
@@ -194,12 +171,7 @@ SERVICES = {
},
["bl.spamcop.net"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.2"] = "SPAM",
@@ -209,12 +181,7 @@ SERVICES = {
},
["dnsbl.ahbl.org"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.4"] = "SPAM",
@@ -228,12 +195,7 @@ SERVICES = {
},
["l2.apews.org"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.2"] = "SPAM",
@@ -247,12 +209,7 @@ SERVICES = {
PROXY = {
["dnsbl.tornevall.org"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
if ( "short" == self.mode and r[1] ) then
return { state = "PROXY" }
@@ -286,12 +243,7 @@ SERVICES = {
["port"] = "the port to which the target can relay to",
["ip"] = "the IP address to which the target can relay to"
},
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
fmt_query = function(self)
if ( not(self.config.port) or not(self.config.ip) ) then
return
@@ -314,12 +266,7 @@ SERVICES = {
["short"] = "A",
["long"] = "TXT",
},
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.100"] = "PROXY",
@@ -366,12 +313,7 @@ SERVICES = {
},
["dnsbl.ahbl.org"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.3"] = "PROXY",
@@ -381,12 +323,7 @@ SERVICES = {
},
["http.dnsbl.sorbs.net"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.2"] = "PROXY",
@@ -396,12 +333,7 @@ SERVICES = {
},
["socks.dnsbl.sorbs.net"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.3"] = "PROXY",
@@ -411,12 +343,7 @@ SERVICES = {
},
["misc.dnsbl.sorbs.net"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.4"] = "PROXY",
@@ -432,12 +359,7 @@ SERVICES = {
configuration = {
["apikey"] = "the http:BL API key"
},
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
fmt_query = function(self)
if ( not(self.config.apikey) ) then
return
@@ -522,12 +444,7 @@ SERVICES = {
},
["all.bl.blocklist.de"] = {
new = function(self, ip, mode, config)
local o = { ip = ip, mode = mode, config = config }
setmetatable(o, self)
self.__index = self
return o
end,
new = service_new,
resp_parser = function(self, r)
local responses = {
["127.0.0.2"] = "Amavis",