Mercurial > prosody-modules
annotate mod_firewall/conditions.lib.lua @ 2308:1d05491b3e84
mod_carbons: Compare with correct variable
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 23 Sep 2016 14:05:51 +0200 |
parents | 21bc4d7cddae |
children | 6848297cf40a |
rev | line source |
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1 --luacheck: globals meta idsafe |
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2 local condition_handlers = {}; |
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3 |
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4 local jid = require "util.jid"; |
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5 |
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6 -- Return a code string for a condition that checks whether the contents |
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7 -- of variable with the name 'name' matches any of the values in the |
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8 -- comma/space/pipe delimited list 'values'. |
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9 local function compile_comparison_list(name, values) |
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10 local conditions = {}; |
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11 for value in values:gmatch("[^%s,|]+") do |
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12 table.insert(conditions, ("%s == %q"):format(name, value)); |
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13 end |
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14 return table.concat(conditions, " or "); |
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15 end |
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16 |
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17 function condition_handlers.KIND(kind) |
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18 return compile_comparison_list("name", kind), { "name" }; |
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19 end |
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20 |
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21 local wildcard_equivs = { ["*"] = ".*", ["?"] = "." }; |
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22 |
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23 local function compile_jid_match_part(part, match) |
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24 if not match then |
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25 return part.." == nil"; |
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26 end |
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27 local pattern = match:match("^<(.*)>$"); |
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28 if pattern then |
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29 if pattern == "*" then |
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30 return part; |
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31 end |
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32 if pattern:find("^<.*>$") then |
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33 pattern = pattern:match("^<(.*)>$"); |
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34 else |
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35 pattern = pattern:gsub("%p", "%%%0"):gsub("%%(%p)", wildcard_equivs); |
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36 end |
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37 return ("(%s and %s:find(%q))"):format(part, part, "^"..pattern.."$"); |
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38 else |
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39 return ("%s == %q"):format(part, match); |
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40 end |
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41 end |
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42 |
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43 local function compile_jid_match(which, match_jid) |
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44 local match_node, match_host, match_resource = jid.split(match_jid); |
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45 local conditions = {}; |
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46 conditions[#conditions+1] = compile_jid_match_part(which.."_node", match_node); |
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47 conditions[#conditions+1] = compile_jid_match_part(which.."_host", match_host); |
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48 if match_resource then |
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49 conditions[#conditions+1] = compile_jid_match_part(which.."_resource", match_resource); |
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50 end |
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51 return table.concat(conditions, " and "); |
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52 end |
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53 |
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54 function condition_handlers.TO(to) |
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55 return compile_jid_match("to", to), { "split_to" }; |
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56 end |
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57 |
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58 function condition_handlers.FROM(from) |
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59 return compile_jid_match("from", from), { "split_from" }; |
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60 end |
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61 |
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62 function condition_handlers.FROM_EXACTLY(from) |
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63 return ("from == %q"):format(from), { "from" }; |
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64 end |
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65 |
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66 function condition_handlers.TO_EXACTLY(to) |
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67 return ("to == %q"):format(to), { "to" }; |
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68 end |
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69 |
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70 function condition_handlers.TYPE(type) |
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71 return compile_comparison_list("(type or (name == 'message' and 'normal') or (name == 'presence' and 'available'))", type), { "type", "name" }; |
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72 end |
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73 |
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74 local function zone_check(zone, which) |
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75 local which_not = which == "from" and "to" or "from"; |
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76 return ("(zone_%s[%s_host] or zone_%s[%s] or zone_%s[bare_%s]) " |
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77 .."and not(zone_%s[%s_host] or zone_%s[%s] or zone_%s[bare_%s])" |
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78 ) |
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79 :format(zone, which, zone, which, zone, which, |
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80 zone, which_not, zone, which_not, zone, which_not), { |
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81 "split_to", "split_from", "bare_to", "bare_from", "zone:"..zone |
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82 }; |
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83 end |
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84 |
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85 function condition_handlers.ENTERING(zone) |
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86 return zone_check(zone, "to"); |
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87 end |
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88 |
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89 function condition_handlers.LEAVING(zone) |
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90 return zone_check(zone, "from"); |
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91 end |
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92 |
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93 function condition_handlers.PAYLOAD(payload_ns) |
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94 return ("stanza:get_child(nil, %q)"):format(payload_ns); |
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95 end |
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96 |
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97 function condition_handlers.INSPECT(path) |
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98 if path:find("=") then |
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99 local query, is_pattern_match, value = path:match("(.-)(~?)=(.*)"); |
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100 if is_pattern_match ~= "" then |
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101 return ("stanza:find(%q):match(%q)"):format(path:match("(.-)~=(.*)")); |
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102 else |
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103 return ("stanza:find(%q) == %q"):format(path:match("(.-)=(.*)")); |
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|
104 end |
954
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|
105 end |
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106 return ("stanza:find(%q)"):format(path); |
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|
107 end |
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|
108 |
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109 function condition_handlers.FROM_GROUP(group_name) |
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110 return ("group_contains(%q, bare_from)"):format(group_name), { "group_contains", "bare_from" }; |
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|
111 end |
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|
112 |
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|
113 function condition_handlers.TO_GROUP(group_name) |
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114 return ("group_contains(%q, bare_to)"):format(group_name), { "group_contains", "bare_to" }; |
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|
115 end |
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|
116 |
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|
117 function condition_handlers.FROM_ADMIN_OF(host) |
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|
118 return ("is_admin(bare_from, %s)"):format(host ~= "*" and host or nil), { "is_admin", "bare_from" }; |
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|
119 end |
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|
120 |
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|
121 function condition_handlers.TO_ADMIN_OF(host) |
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|
122 return ("is_admin(bare_to, %s)"):format(host ~= "*" and host or nil), { "is_admin", "bare_to" }; |
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parents:
diff
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|
123 end |
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parents:
diff
changeset
|
124 |
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|
125 local day_numbers = { sun = 0, mon = 2, tue = 3, wed = 4, thu = 5, fri = 6, sat = 7 }; |
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|
126 |
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|
127 local function current_time_check(op, hour, minute) |
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128 hour, minute = tonumber(hour), tonumber(minute); |
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129 local adj_op = op == "<" and "<" or ">="; -- Start time inclusive, end time exclusive |
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130 if minute == 0 then |
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131 return "(current_hour"..adj_op..hour..")"; |
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|
132 else |
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|
133 return "((current_hour"..op..hour..") or (current_hour == "..hour.." and current_minute"..adj_op..minute.."))"; |
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|
134 end |
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|
135 end |
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|
136 |
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|
137 local function resolve_day_number(day_name) |
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|
138 return assert(day_numbers[day_name:sub(1,3):lower()], "Unknown day name: "..day_name); |
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|
139 end |
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|
140 |
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|
141 function condition_handlers.DAY(days) |
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|
142 local conditions = {}; |
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|
143 for day_range in days:gmatch("[^,]+") do |
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|
144 local day_start, day_end = day_range:match("(%a+)%s*%-%s*(%a+)"); |
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|
145 if day_start and day_end then |
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changeset
|
146 local day_start_num, day_end_num = resolve_day_number(day_start), resolve_day_number(day_end); |
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|
147 local op = "and"; |
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|
148 if day_end_num < day_start_num then |
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|
149 op = "or"; |
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|
150 end |
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diff
changeset
|
151 table.insert(conditions, ("current_day >= %d %s current_day <= %d"):format(day_start_num, op, day_end_num)); |
2070
2356114ff505
mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents:
2036
diff
changeset
|
152 elseif day_range:find("%a") then |
968
f3b0ddeebd9d
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diff
changeset
|
153 local day = resolve_day_number(day_range:match("%a+")); |
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diff
changeset
|
154 table.insert(conditions, "current_day == "..day); |
f3b0ddeebd9d
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diff
changeset
|
155 else |
f3b0ddeebd9d
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diff
changeset
|
156 error("Unable to parse day/day range: "..day_range); |
f3b0ddeebd9d
mod_firewall/conditions: Add DAY and TIME conditions
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parents:
965
diff
changeset
|
157 end |
f3b0ddeebd9d
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diff
changeset
|
158 end |
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diff
changeset
|
159 assert(#conditions>0, "Expected a list of days or day ranges"); |
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diff
changeset
|
160 return "("..table.concat(conditions, ") or (")..")", { "time:day" }; |
f3b0ddeebd9d
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parents:
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diff
changeset
|
161 end |
f3b0ddeebd9d
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diff
changeset
|
162 |
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diff
changeset
|
163 function condition_handlers.TIME(ranges) |
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diff
changeset
|
164 local conditions = {}; |
f3b0ddeebd9d
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diff
changeset
|
165 for range in ranges:gmatch("([^,]+)") do |
f3b0ddeebd9d
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diff
changeset
|
166 local clause = {}; |
f3b0ddeebd9d
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diff
changeset
|
167 range = range:lower() |
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diff
changeset
|
168 :gsub("(%d+):?(%d*) *am", function (h, m) return tostring(tonumber(h)%12)..":"..(tonumber(m) or "00"); end) |
f3b0ddeebd9d
mod_firewall/conditions: Add DAY and TIME conditions
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parents:
965
diff
changeset
|
169 :gsub("(%d+):?(%d*) *pm", function (h, m) return tostring(tonumber(h)%12+12)..":"..(tonumber(m) or "00"); end); |
f3b0ddeebd9d
mod_firewall/conditions: Add DAY and TIME conditions
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parents:
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diff
changeset
|
170 local start_hour, start_minute = range:match("(%d+):(%d+) *%-"); |
f3b0ddeebd9d
mod_firewall/conditions: Add DAY and TIME conditions
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parents:
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diff
changeset
|
171 local end_hour, end_minute = range:match("%- *(%d+):(%d+)"); |
f3b0ddeebd9d
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parents:
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diff
changeset
|
172 local op = tonumber(start_hour) > tonumber(end_hour) and " or " or " and "; |
f3b0ddeebd9d
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parents:
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diff
changeset
|
173 if start_hour and end_hour then |
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diff
changeset
|
174 table.insert(clause, current_time_check(">", start_hour, start_minute)); |
f3b0ddeebd9d
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diff
changeset
|
175 table.insert(clause, current_time_check("<", end_hour, end_minute)); |
f3b0ddeebd9d
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diff
changeset
|
176 end |
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diff
changeset
|
177 if #clause == 0 then |
f3b0ddeebd9d
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diff
changeset
|
178 error("Unable to parse time range: "..range); |
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diff
changeset
|
179 end |
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diff
changeset
|
180 table.insert(conditions, "("..table.concat(clause, " "..op.." ")..")"); |
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diff
changeset
|
181 end |
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changeset
|
182 return table.concat(conditions, " or "), { "time:hour,min" }; |
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diff
changeset
|
183 end |
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parents:
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diff
changeset
|
184 |
2128
21bc4d7cddae
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Matthew Wild <mwild1@gmail.com>
parents:
2127
diff
changeset
|
185 function condition_handlers.LIMIT(spec) |
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parents:
2127
diff
changeset
|
186 local name, param = spec:match("^(%w+) on (.+)$"); |
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mod_firewall: Add support for throttling based on user-defined properties (experimental)
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diff
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|
187 |
21bc4d7cddae
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diff
changeset
|
188 if not name then |
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mod_firewall: Add support for throttling based on user-defined properties (experimental)
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parents:
2127
diff
changeset
|
189 name = spec:match("^%w+$"); |
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diff
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|
190 if not name then |
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2127
diff
changeset
|
191 error("Unable to parse LIMIT specification"); |
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2127
diff
changeset
|
192 end |
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diff
changeset
|
193 else |
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2127
diff
changeset
|
194 param = meta(("%q"):format(param)); |
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2127
diff
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|
195 end |
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diff
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|
196 |
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2127
diff
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|
197 if not param then |
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diff
changeset
|
198 return ("not global_throttle_%s:poll(1)"):format(name), { "globalthrottle:"..name }; |
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2127
diff
changeset
|
199 end |
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2127
diff
changeset
|
200 return ("not multi_throttle_%s:poll_on(%s, 1)"):format(name, param), { "multithrottle:"..name }; |
971
53e158e44a44
mod_firewall: Add rate limiting capabilities, and keep zones and throttle objects in shared tables
Matthew Wild <mwild1@gmail.com>
parents:
968
diff
changeset
|
201 end |
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mod_firewall: Add rate limiting capabilities, and keep zones and throttle objects in shared tables
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968
diff
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|
202 |
2107
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
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diff
changeset
|
203 function condition_handlers.ORIGIN_MARKED(name_and_time) |
2127
59023dffbdd4
mod_firewall: Allow underscore in mark names (thanks Ge0rG)
Matthew Wild <mwild1@gmail.com>
parents:
2125
diff
changeset
|
204 local name, time = name_and_time:match("^%s*([%w_]+)%s+%(([^)]+)s%)%s*$"); |
2107
f445f43b9ba1
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diff
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|
205 if not name then |
2127
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2125
diff
changeset
|
206 name = name_and_time:match("^%s*([%w_]+)%s*$"); |
2107
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
parents:
2075
diff
changeset
|
207 end |
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mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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2075
diff
changeset
|
208 if not name then |
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
parents:
2075
diff
changeset
|
209 error("Error parsing mark name, see documentation for usage examples"); |
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
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parents:
2075
diff
changeset
|
210 end |
f445f43b9ba1
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Matthew Wild <mwild1@gmail.com>
parents:
2075
diff
changeset
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211 if time then |
2116
2bb42ba342f3
mod_firewall: Fix usage of incorrect variable current_time in ORIGIN_MARKED condition (thanks Ge0rG)
Matthew Wild <mwild1@gmail.com>
parents:
2109
diff
changeset
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212 return ("(current_timestamp - (session.firewall_marked_%s or 0)) < %d"):format(idsafe(name), tonumber(time)), { "timestamp" }; |
2107
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
parents:
2075
diff
changeset
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213 end |
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
parents:
2075
diff
changeset
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214 return ("not not session.firewall_marked_"..idsafe(name)); |
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
parents:
2075
diff
changeset
|
215 end |
f445f43b9ba1
mod_firewall: Add support for session marking (MARK_ORIGIN, UNMARK_ORIGIN, ORIGIN_MARKED)
Matthew Wild <mwild1@gmail.com>
parents:
2075
diff
changeset
|
216 |
947
c91cac3b823f
mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff
changeset
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217 return condition_handlers; |