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import str;
import vec;
import uint;
tag ip_addr { ipv4(u8, u8, u8, u8); }
fn format_addr(ip: ip_addr) -> istr {
alt ip {
ipv4(a, b, c, d) {
#ifmt["%u.%u.%u.%u", a as uint, b as uint, c as uint, d as uint]
}
_ { fail "Unsupported address type"; }
}
}
fn parse_addr(ip: &istr) -> ip_addr {
let parts = vec::map(
{ |&s| uint::from_str(s) },
istr::split(ip, ~"."[0]));
if vec::len(parts) != 4u { fail "Too many dots in IP address"; }
for i in parts { if i > 255u { fail "Invalid IP Address part."; } }
ipv4(parts[0] as u8, parts[1] as u8, parts[2] as u8, parts[3] as u8)
}
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