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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-2020, TBOOX Open Source Group.
--
-- @author ruki
-- @file ping.lua
--
-- imports
import("lib.detect.cache")
import("detect.tools.find_ping")
import("detect.tools.find_nmap")
import("private.async.runjobs")
-- send ping to hosts
--
-- @param hosts the hosts
-- @param opt the options
--
-- @return the time or -1
--
function main(hosts, opt)
-- init options
opt = opt or {}
-- find ping
local ping = find_ping(opt)
if not ping then
return {}
end
-- do not force ping? enable cache
local cacheinfo = nil
if not opt.force then
cacheinfo = cache.load("net.ping")
end
-- run tasks
local results = {}
hosts = table.wrap(hosts)
runjobs("ping", function (index)
local host = hosts[index]
if host then
-- get time value from cache first
local timeval = nil
if cacheinfo then
timeval = cacheinfo[host]
end
if timeval then
results[host] = timeval
else
-- ping it, timeout: 1s
local data = nil
if is_host("windows") then
data = try { function () return os.iorun("%s -n 1 -w 1000 %s", ping, host) end }
elseif is_host("macosx") then
data = try { function () return os.iorun("%s -c 1 -t 1 %s", ping, host) end }
else
data = try { function () return os.iorun("%s -c 1 -W 1 %s", ping, host) end }
end
-- find time
local timeval = "65535"
if data then
timeval = data:match("time=([%d%s%.]-)ms", 1, true) or data:match("=([%d%s%.]-)ms TTL", 1, true) or "65535"
end
if timeval == "65535" then
local nmap = find_nmap()
if nmap then
data = try { function() return os.iorun("%s -T5 --max-retries 1 -p 80 --max-rtt-timeout 1 %s", nmap, host) end }
if data then
local timeval_s = data:match("in ([%d%.]-) seconds")
if timeval_s then
timeval_s = tonumber(timeval_s:trim()) * 1000
if timeval_s > 0 then
timeval = tostring(timeval_s)
end
end
end
end
end
-- save results
if timeval then
timeval = tonumber(timeval:trim())
end
results[host] = timeval
if cacheinfo then
cacheinfo[host] = timeval
end
-- trace
vprint("pinging for the host(%s) ... %d ms", host, timeval)
end
end
end, {total = #hosts})
-- save cache
if cacheinfo then
cache.save("net.ping", cacheinfo)
end
-- ok?
return results
end
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