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|
-- acf model for squid
-- Copyright(c) 2007 A. Brodmann - Licensed under terms of GPL2
module (..., package.seeall)
squidconf = "/etc/squid/squid.conf"
--- the tokenizer functions - must be dislocated into a library later
tokenizer = {}
tokenizer.new = function( str, delim )
local token = {}
token.value = str;
token.delim = delim;
token.pos = 1
return token
end
tokenizer.pos = function( value, substr, pos )
local retval = pos
local done = false
while not done and retval <= #value do
if string.sub( value, retval, retval ) == substr then
done = true
else
retval = retval + 1
end
end
return retval
end
tokenizer.next = function( token )
if token.pos > #token.value then
return token, nil
end
local strpos = tokenizer.pos( token.value, token.delim, token.pos )
retval = string.sub(token.value, token.pos, strpos-1)
if retval == token.delim then
retval = ""
token.pos = token.pos + 1
else
token.pos = strpos + 1
end
return token, retval
end
---
get_status = function()
local retval = "stopped"
local ptr = io.popen( "/bin/pidof squid" )
local pid = ptr:read( "*a" )
ptr:close()
if pid ~= nil then
if #pid > 1 then
retval = "running"
end
end
return retval
end
service_control = function( control )
local retval = ""
local ptr = io.popen( "/etc/init.d/squid " .. control, "r" )
if ptr ~= nil then
local retmsg = ptr:read( "*a" )
ptr:close()
if retmsg ~= nil then
retval = retmsg
else
retval = "service_control(): Failed to read output from initscript!\n"
end
else
retval = "service_control(): Failed to start/stop/restart service!\n"
end
return retval
end
get_adv_config = function()
local retval = ""
local ptr = io.open( "/etc/squid/squid.conf", "r" )
if ptr ~= nil then
local retcfg = ptr:read( "*a" )
ptr:close()
if retcfg == nil then
retval = "\n\n Error: Failed to read /etc/squid/squid.conf!\n\n"
else
retval = retcfg
end
end
return retval
end
update_adv_config = function( config )
local retval = "Successfully updated /etc/squid/squid.conf!"
local ptr = io.open( "/etc/squid/squid.conf", "wb+" )
if ptr ~= nil then
ptr:write( config )
ptr:close()
else
retval = "update_config(): Error, failed to open /etc/squid/squid.conf!\n"
end
return retval
end
get_conf_tag = function( tag, gat )
local retval = ""
local error = ""
local found = false
local done = false
local fptr = io.open( squidconf, "r" )
if fptr == nil then
return "", "Failed to open squid config file!"
end
while not found and not done do
local line = fptr:read( "*l" )
if line == nil then
done = true
else
if string.sub( line, 1, 22 ) == tag then
found = true
end
end
end
if done then
fptr:close()
return "", "TAG not found in squid config!"
end
found = false
done = false
while not found and not done do
local line = fptr:read( "*l" )
if line == nil then
done = true
elseif string.sub( line, 1, 22 ) == gat then
found = true
else
retval = retval .. "\n" .. line
end
end
if done then
fptr:close()
return "", "End TAG (GAT) not found in squid config! '" .. gat .. "'"
end
fptr:close()
return retval, error
end
get_basic_config = function()
local error = ""
local config = { proxyip = { value="empty", type="text", label="Proxy IP" },
proxyport = { value="", type="text", label="Proxy Port" },
filterip = { value="", type="text", label="Filter IP" },
filterport = { value="", type="text", label="Filter Port" },
filterregex = { value="", type="text", label="FilterRegex" },
safeports = { value="", type="text", label="Safe_ports" },
sslports = { value="", type="text", label="SSL_ports" },
accesslog = { value="", type="select", label="Access Logs", option={ "yes", "no" } },
diskcache = { value="", type="select", label="Disk Cache Parameters", option={ "yes", "no" } },
authmethod = { value="", type="text", label="Authentication Method" }
}
local cfg1, error = get_conf_tag( "### ACF-SQUID-TAG-0001", "### ACF-SQUID-GAT-0001" )
if #error > 0 then
return config, error
end
local cfg1tok = ""
local cfg2tok = ""
local cfg3tok = ""
--- get proxyip, proxyport
cfg1tok = tokenizer.new( cfg1, "\n" )
local done = false
while not done do
local str1 = ""
cfg1tok, str1 = tokenizer.next( cfg1tok )
if str1 == nil then
return nil, "Corrupt squid.conf! Missing 'http_port' statement!"
else
if string.sub( str1, 1, 10 ) == "http_port " then
local str2 = ""
local ipport = ""
local ip = ""
local port = ""
cfg2tok = tokenizer.new( str1, " " )
cfg2tok, ipport = tokenizer.next( cfg2tok )
cfg2tok, ipport = tokenizer.next( cfg2tok )
if ipport == nil then
return config, "Corrupt squid.conf! Missing parameter #1 for 'http_port' statement!"
end
cfg3tok = tokenizer.new( ipport, ":" )
cfg3tok, ip = tokenizer.next( cfg3tok )
cfg3tok, port = tokenizer.next( cfg3tok )
if port == nil then
port = ip
ip = ""
end
config.proxyip.value = ip
config.proxyport.value = port
done = true
end
end
end
cfg1tok = nil
cfg2tok = nil
cfg3tok = nil
--- get filterip, filterport
local cfg1, error = get_conf_tag( "### ACF-SQUID-TAG-0007", "### ACF-SQUID-GAT-0007" )
if #error > 0 then
return config, error
end
cfg1tok = tokenizer.new( cfg1, "\n" )
done = false
while not done do
local str1 = ""
cfg1tok, str1 = tokenizer.next( cfg1tok )
if str1 == nil then
return nil, "Corrupt squid.conf! Missing 'cache_peer' statement!"
else
if string.sub( str1, 1, 11 ) == "cache_peer " then
local str2 = ""
local tmp = ""
local ip = ""
local port = ""
cfg2tok = tokenizer.new( str1, " " )
cfg2tok, tmp = tokenizer.next( cfg2tok )
cfg2tok, ip = tokenizer.next( cfg2tok )
cfg2tok, tmp = tokenizer.next( cfg2tok )
cfg2tok, port = tokenizer.next( cfg2tok )
if ip == nil or port == nil then
return config, "Corrupt squid.conf! Missing parameters #2 and/or #4 for 'cache_peer' statement!"
end
config.filterip.value = ip
config.filterport.value = port
done = true
end
end
end
cfg1tok = nil
cfg2tok = nil
cfg3tok = nil
--- get diskcache
local cfg1, error = get_conf_tag( "### ACF-SQUID-TAG-0002", "### ACF-SQUID-GAT-0002" )
if #error > 0 then
return config, error
end
cfg1tok = tokenizer.new( cfg1, "\n" )
done = false
while not done do
local str1 = ""
cfg1tok, str1 = tokenizer.next( cfg1tok )
if str1 == nil then
return nil, "Corrupt squid.conf! Missing 'cache_dir' statement!"
else
if string.sub( str1, 1, 15 ) == "cache_dir diskd" then
config.diskcache.value = "yes"
done = true
elseif string.sub( str1, 1, 14 ) == "cache_dir null" then
config.diskcache.value = "no"
done = true
end
end
end
cfg1tok = nil
--- authentication method
local cfg1, error = get_conf_tag( "### ACF-SQUID-TAG-0004", "### ACF-SQUID-GAT-0004" )
if #error > 0 then
return config, error
end
cfg1tok = tokenizer.new( cfg1, "\n" )
local done = false
local auth = ""
while not done do
local str1 = ""
cfg1tok, str1 = tokenizer.next( cfg1tok )
if str1 == nil then
done = true
else
if string.sub( str1, 1, 18 ) == "auth_param digest " then
if string.match( auth, "D" ) == nil then
auth = auth .. "D"
end
elseif string.sub( str1, 1, 16 ) == "auth_param ntlm " then
if string.match( auth, "N" ) == nil then
auth = auth .. "N"
end
elseif string.sub( str1, 1, 17 ) == "auth_param basic " then
if string.match( auth, "B" ) == nil then
auth = auth .. "B"
end
end
end
end
config.authmethod.value = auth
cfg1tok = nil
--- get filterregex
local cfg1, error = get_conf_tag( "### ACF-SQUID-TAG-0005", "### ACF-SQUID-GAT-0005" )
if #error > 0 then
return config, error
end
cfg1tok = tokenizer.new( cfg1, "\n" )
done = false
while not done do
local str1 = ""
cfg1tok, str1 = tokenizer.next( cfg1tok )
if str1 == nil then
return nil, "Corrupt squid.conf! Missing 'acl ContentFilter urlpath_regex -i' statement!"
else
if string.sub( str1, 1, 35 ) == "acl ContentFilter urlpath_regex -i " then
config.filterregex.value = string.sub( str1, 36 )
done = true
end
end
end
cfg1tok = nil
cfg2tok = nil
cfg3tok = nil
--- get SSL_ports, Safe_ports
local done1 = false
local done2 = false
cfg1tok = tokenizer.new( cfg1, "\n" )
while not done1 or not done2 do
local str1 = ""
cfg1tok, str1 = tokenizer.next( cfg1tok )
if str1 == nil then
return nil, "Corrupt squid.conf! Missing 'acl SSL_ports/Safe_ports' statement!"
else
if string.sub( str1, 1, 19 ) == "acl SSL_ports port " then
config.sslports.value = string.sub( str1, 20 )
done1 = true
elseif string.sub( str1, 1, 20 ) == "acl Safe_ports port " then
config.safeports.value = string.sub( str1, 21 )
done2 = true
end
end
end
cfg1tok = nil
return config, error
end
|