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|
use "die.use"
use "intparse.use"
use "option.use"
use "strfind.use"
use "types.use"
use "chartype.use"
use "fmt.use"
use "slcp.use"
use "slfill.use"
use "sleq.use"
/* FIXME: needed for decls which should be pulled in as hidden */
use "hasprefix.use"
use "utf.use"
pkg std =
type netaddr = union
`Ipv4 byte[4]
`Ipv6 byte[16]
;;
const ipparse : (ip : byte[:] -> option(netaddr))
const ip4parse : (ip : byte[:] -> option(netaddr))
const ip6parse : (ip : byte[:] -> option(netaddr))
;;
const ipparse = {ip
match strfind(ip, ":")
| `Some _: -> ip6parse(ip)
| `None: -> ip4parse(ip)
;;
}
const ip4parse = {ip
var a, b, c, d
var ok
(a, ip, ok) = num(ip, 0, 255, 10, '.', true)
(ip, ok) = delim(ip, '.', ok)
(b, ip, ok) = num(ip, 0, 255, 10, '.', ok)
(ip, ok) = delim(ip, '.', ok)
(c, ip, ok) = num(ip, 0, 255, 10, '.', ok)
(ip, ok) = delim(ip, '.', ok)
(d, ip, ok) = num(ip, 0, 255, 10, '.', ok)
if ok && ip.len == 0
-> `Some (`Ipv4 [a, b, c, d])
else
-> `None
;;
}
const ip6parse = {ip
var val : byte[16]
var expand, split
var v, ok
var i, nseg
ok = true
expand = false
split = 0
if ip.len > 2 && std.sleq(ip[:2], "::")
expand = true
split = 0
;;
nseg = 0
for i = 0; ip.len > 0 && ok; i++
/* parse 'num' segment */
(v, ip, ok) = num(ip, 0, 65536, 16, ':', ok)
nseg++
if ip.len == 0 || nseg == 8
break
;;
(ip, ok) = delim(ip, ':', ok)
/* only one '::' allowed once */
if ip.len > 0 && ip[0] == ':'castto(byte) && !expand
expand = true
split = i
(ip, ok) = delim(ip, ':', ok)
;;
/* pack it into the bytes */
val[i*2] = ((v & 0xff00) >> 8) castto(byte)
val[i*2 + 1] = (v & 0xff) castto(byte)
;;
if ok && ip.len == 0
if expand
expandsplit(val[:], split, i)
elif nseg != 8
-> `None
;;
-> `Some `Ipv6 val
else
-> `None
;;
}
/* take "a:b::c:d" and expand it to "a:b:0:0:...:0:c:d" */
const expandsplit = {ip, split, len
var width
width = 16 - len
std.slcp(ip[split:len], ip[split+width:len+width])
std.slfill(ip[len:len+width], 0)
}
const delim = {ip, sep, ok
if ip.len > 0 && ip[0] == sep castto(byte)
-> (ip[1:], ok)
else
-> ("", false)
;;
}
generic num = {ip, lo, hi, base, sep, ok -> (@a::(numeric,integral), byte[:], bool)
var len
if !ok
-> (0, "", false)
;;
for len = 0; len < ip.len; len++
if ip[len] == sep castto(byte)
break
;;
;;
match intparsebase(ip[:len], base)
| `std.Some v:
if v < lo || v > hi
-> (0, "", false)
;;
-> (v castto(@a::(numeric,integral)), ip[len:], true)
| `std.None:
-> (0, "", false)
;;
}
|
