Re: Retrieve public IP
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- Subject: Re: Retrieve public IP
- From: Sean Conner <sean@...>
- Date: 2015年5月25日 04:55:24 -0400
It was thus said that the Great Claudio Mussoni once stated:
> Hello to everyone,I need to get the public address from my router with LUA.
> This is a PHP example: $my_public_ip = $_SERVER['REMOTE_ADDR'];
> I searched around but I' ve not found examples.Someone can help me out?Thank's a lot.ByeClaudio
Here's how I do it:
#!/usr/bin/env lua
-- http://luasnmp.luaforge.net/snmp.html
snmp = require "snmp"
OID = snmp.mib.oid
print(" Dest Mask If")
print("----------------------------------------")
router = assert(snmp.open{
peer = arg[1] or "192.168.1.1",
community = arg[2] or "public"
})
interfaces = {}
do
local max = router['ifNumber.0']
for i = 1 , max do
interfaces[i] = router['ifDescr.' .. tostring(i)]
end
end
setmetatable(interfaces,{ __index = function(t,k) return "(unknown)" end })
values =
{
addr = OID "IP-MIB::ipAdEntAddr",
mask = OID "IP-MIB::ipAdEntNetMask",
intf = OID "IP-MIB::ipAdEntIfIndex"
}
result = {}
for field,oid in pairs(values) do
local tmp = router[oid]
local i = 1;
result[field] = {}
for k,v in snmp.spairs(tmp) do
result[field][i] = v
i = i + 1
end
result.items = i - 1
end
for i=1,result.items do
print(string.format("%-16s",result.addr[i])
.. string.format("%-16s",result.mask[i])
.. interfaces[result.intf[i]]
)
end
And output:
Dest Mask If
----------------------------------------
127.0.0.1 255.0.0.0 lo
192.168.1.1 255.255.255.0 br0
74.---.---.--- 255.255.255.255 ipsec0
-spc (But this supposes your router supports SNMP and it's configured)