124 lines
No EOL
3 KiB
Lua
124 lines
No EOL
3 KiB
Lua
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function mysplit (inputstr, sep)
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if sep == nil then
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sep = "%s"
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end
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local t={}
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for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
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table.insert(t, str)
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end
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return t
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end
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function table.slice(tbl, first, last, step)
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local sliced = {}
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for i = first or 1, last or #tbl, step or 1 do
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sliced[#sliced+1] = tbl[i]
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end
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return sliced
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end
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function validate(data,from,to)
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headers = {}
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begindata = false
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i = 1
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while true do
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line = mysplit(data,"\n")[i]
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if line == nil then break end
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if begindata == false then
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line = mysplit(line, ":")
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if line[1] == nil then
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begindata = true
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else
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headers[line[1]] = line[2]
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end
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else
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headers["body"] = (headers["body"] or "") .. line .. "\n"
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end
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i = i + 1
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end
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if not headers["From"] or not headers["From"]:find(from) then return false end
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if not to:find("@doesnm.cc") then return false end
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return headers
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end
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function string.starts(String,Start)
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return string.sub(String,1,string.len(Start))==Start
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end
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from = nil
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to = nil
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data = false
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dataBuf = ""
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print("220 doesnm.cc Simple Mail Transfer Service Ready")
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while true do
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line = io.read("*line")
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line = mysplit(line)
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if line[1] == "NOOP" and data == false then
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print("250 OK")
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elseif line[1] == "HELO" then
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if #line < 2 then
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print("251 Command requires argument")
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else
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print("250 Hello " .. line[2])
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end
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elseif line[1] == "EHLO" then
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if #line < 2 then
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print("251 Command requires argument")
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else
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print("250-Hello " .. line[2])
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print("250 SIZE 1000000")
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end
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elseif line[1] == "VRFY" and data == false then
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print("252 Cannot VRFY user, but will accept message")
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elseif line[1] == "QUIT" and data == false then
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print("221 Bye!")
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os.exit()
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elseif line[1] == "MAIL" and data == false then
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if #line < 2 then print("501 Incorrent number of arguments")
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else
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if string.starts(line[2],"FROM:") then
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from = table.concat(table.slice(mysplit(table.concat(line," "),":"),2))
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print("250 OK")
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else
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print("501 Incorrect number of arguments")
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end
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end
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elseif line[1] == "RCPT" and data == false then
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if #line < 2 then
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print("501 Incorrent number of arguments")
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else
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if string.starts(line[2],"TO:") then
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to = table.concat(table.slice(mysplit(table.concat(line," "),":"),2))
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print("250 OK")
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else
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print("502 Unrecognized command")
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end
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end
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elseif line[1] == "DATA" and from ~= nil and to ~= nil then
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data = true
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print("354 Send message content; End with <CRLF>.<CRLF>")
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elseif line[1] == "." and data == true then
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if not validate(dataBuf,from,to) then print("250 NOTOK")
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data = false else
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out = io.open("/var/mail/root","a")
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out:write("From " .. from .." ".. os.date("%a %b %d %H:%M:%S %Y") .. "\n")
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out:write(dataBuf)
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out:close()
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print("250 OK")
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data = false
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end
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else
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if data == true then
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dataBuf = dataBuf .. table.concat(line, " ") .. "\n"
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else
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print("502 Unrecognized command")
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end
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end
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end |