File size: 5,450 Bytes
afa0cbf | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | #![cfg(target_os = "linux")]
use std::net::TcpListener;
use std::time::Duration;
use std::time::Instant;
use anyhow::Result;
use tempfile::TempDir;
const BWRAP_UNAVAILABLE_ERR: &str = "bubblewrap is unavailable";
#[test]
fn sandbox_with_network_proxy_blocks_direct_loopback_access() -> Result<()> {
let codex_home = TempDir::new()?;
let listener = TcpListener::bind("127.0.0.2:0")?;
let port = listener.local_addr()?.port();
std::fs::write(
codex_home.path().join("config.toml"),
r#"
default_permissions = "network-test"
[features]
network_proxy = true
use_legacy_landlock = true
[permissions.network-test]
extends = ":workspace"
[permissions.network-test.network]
enabled = true
mode = "full"
"#,
)?;
let url = format!("http://127.0.0.2:{port}/");
let output = std::process::Command::new(codex_utils_cargo_bin::cargo_bin("codex")?)
.env("CODEX_HOME", codex_home.path())
.args([
"sandbox",
"--permission-profile",
"network-test",
"--",
"curl",
"--noproxy",
"*",
"--silent",
"--show-error",
"--connect-timeout",
"1",
"--max-time",
"2",
url.as_str(),
])
.output()?;
let stderr = String::from_utf8_lossy(&output.stderr);
if stderr.contains(BWRAP_UNAVAILABLE_ERR) {
eprintln!("skipping network proxy sandbox test: bubblewrap is unavailable");
return Ok(());
}
assert_eq!(
output.status.code(),
Some(7),
"expected direct loopback access to be blocked; status={:?}; stdout={}; stderr={}",
output.status.code(),
String::from_utf8_lossy(&output.stdout),
stderr,
);
Ok(())
}
#[test]
fn sandbox_with_network_proxy_allows_explicit_loopback_access() -> Result<()> {
let codex_home = TempDir::new()?;
let listener = TcpListener::bind("127.0.0.2:0")?;
let port = listener.local_addr()?.port();
listener.set_nonblocking(true)?;
let server = std::thread::spawn(move || -> std::io::Result<()> {
let deadline = Instant::now() + Duration::from_secs(5);
loop {
match listener.accept() {
Ok((mut stream, _)) => {
// Closing with unread request bytes can reset the connection and yield a 502.
stream.set_nonblocking(false)?;
stream.set_read_timeout(Some(Duration::from_secs(5)))?;
let mut request = Vec::new();
let mut buffer = [0_u8; 1024];
while !request.windows(4).any(|window| window == b"\r\n\r\n") {
let bytes_read = std::io::Read::read(&mut stream, &mut buffer)?;
if bytes_read == 0 || request.len() + bytes_read > 64 * 1024 {
return Err(std::io::Error::other(
"incomplete or oversized loopback request headers",
));
}
request.extend_from_slice(&buffer[..bytes_read]);
}
std::io::Write::write_all(
&mut stream,
b"HTTP/1.1 204 No Content\r\nContent-Length: 0\r\n\r\n",
)?;
return Ok(());
}
Err(err) if err.kind() == std::io::ErrorKind::WouldBlock => {
if Instant::now() >= deadline {
return Err(std::io::Error::new(
std::io::ErrorKind::TimedOut,
"timed out waiting for allowlisted loopback request",
));
}
std::thread::sleep(Duration::from_millis(10));
}
Err(err) => return Err(err),
}
}
});
std::fs::write(
codex_home.path().join("config.toml"),
r#"
default_permissions = "network-test"
[features]
network_proxy = true
use_legacy_landlock = true
[permissions.network-test]
extends = ":workspace"
[permissions.network-test.network]
enabled = true
mode = "full"
allow_local_binding = false
[permissions.network-test.network.domains]
"127.0.0.2" = "allow"
"#,
)?;
let url = format!("http://127.0.0.2:{port}/");
let output = std::process::Command::new(codex_utils_cargo_bin::cargo_bin("codex")?)
.env("CODEX_HOME", codex_home.path())
.args([
"sandbox",
"--permission-profile",
"network-test",
"--",
"curl",
"--fail",
"--silent",
"--show-error",
"--connect-timeout",
"2",
"--max-time",
"4",
url.as_str(),
])
.output()?;
let stderr = String::from_utf8_lossy(&output.stderr);
if stderr.contains(BWRAP_UNAVAILABLE_ERR) {
eprintln!("skipping network proxy sandbox test: bubblewrap is unavailable");
return Ok(());
}
assert!(
output.status.success(),
"expected allowlisted loopback access to succeed; status={:?}; stdout={}; stderr={}",
output.status.code(),
String::from_utf8_lossy(&output.stdout),
stderr,
);
server.join().expect("loopback server panicked")?;
Ok(())
}
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