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use crate::common::{
bnfcore::*, errorparse::SipParseError, nom_wrappers::from_utf8_nom, traits::NomParser,
};
use core::str;
use nom::bytes::complete::{take, take_until, take_while1};
#[derive(PartialEq, Debug)]
pub struct HostPort<'a> {
pub host: &'a str,
pub port: Option<u16>,
}
fn host_char_allowed(c: u8) -> bool {
is_alphanum(c) || c == b'-' || c == b'.'
}
impl<'a> HostPort<'a> {
fn take_ipv6_host(input: &'a [u8]) -> nom::IResult<&[u8], &[u8], SipParseError> {
let (input, _) = take(1usize)(input)?;
let (input, ipv6_host) = take_until("]")(input)?;
let (input, _) = take(1usize)(input)?;
Ok((input, ipv6_host))
}
pub fn take_hostport(
input: &'a [u8],
) -> nom::IResult<&[u8], (&[u8], Option<&[u8]>), SipParseError> {
let (input, host) = if input[0] != b'[' {
take_while1(host_char_allowed)(input)?
} else {
HostPort::take_ipv6_host(input)?
};
let (input, port) = if input.len() > 3 && input[0] == b':' {
let (input, port) = take_while1(is_digit)(&input[1..])?;
(input, Some(port))
} else {
(input, None)
};
Ok((input, (host, port)))
}
}
impl<'a> NomParser<'a> for HostPort<'a> {
type ParseResult = HostPort<'a>;
fn parse(input: &'a [u8]) -> nom::IResult<&[u8], HostPort, SipParseError> {
if input.is_empty() {
return sip_parse_error!(1);
}
let (rest, (host, port)) = HostPort::take_hostport(input)?;
if port == None {
let (_, host_str) = from_utf8_nom(host)?;
return Ok((
rest,
HostPort {
host: host_str,
port: None,
},
));
}
match str::from_utf8(port.unwrap()) {
Ok(port_str) => match u16::from_str_radix(port_str, 10) {
Ok(port) => {
let (_, host_str) = from_utf8_nom(host)?;
return Ok((
rest,
HostPort {
host: host_str,
port: Some(port),
},
));
}
Err(_) => {
return sip_parse_error!(2);
}
},
Err(_) => {
return sip_parse_error!(3, "Convert bytes to utf8 is failed");
}
}
}
}
#[cfg(test)]
mod tests {
use super::*;
fn host_port_test_case(
input: &str,
expected_host: &str,
expected_port: Option<u16>,
expected_rest: &str,
) {
let (rest, hostport) = HostPort::parse(input.as_bytes()).unwrap();
assert_eq!(rest, expected_rest.as_bytes());
assert_eq!(hostport.host, expected_host);
assert_eq!(hostport.port, expected_port);
}
#[test]
fn host_parse_simple() {
host_port_test_case("127.0.0.1", "127.0.0.1", None, "");
host_port_test_case("127.0.0.1\r\n", "127.0.0.1", None, "\r\n");
host_port_test_case("127.0.0.1\n", "127.0.0.1", None, "\n");
host_port_test_case("127.0.0.1:8080", "127.0.0.1", Some(8080), "");
host_port_test_case("google.com", "google.com", None, "");
host_port_test_case("[2001:db8::10]", "2001:db8::10", None, "");
host_port_test_case("[2001:db8::10]:8080", "2001:db8::10", Some(8080), "");
}
#[test]
fn host_parse_with_rest() {
host_port_test_case(
"atlanta.com;transport=tcp",
"atlanta.com",
None,
";transport=tcp",
);
host_port_test_case(
"123.222.111.222:8081;transport=tcp",
"123.222.111.222",
Some(8081),
";transport=tcp",
);
host_port_test_case(
"atlanta.com:80?subject=project%20x&priority=urgent",
"atlanta.com",
Some(80),
"?subject=project%20x&priority=urgent",
);
host_port_test_case(
"[2001:db8::10]:8080;transport=tcp",
"2001:db8::10",
Some(8080),
";transport=tcp",
);
}
}