systemprompt_models/
net.rs

1//! Shared network timeout constants and outbound-URL validation.
2//!
3//! Centralised [`Duration`] values for HTTP client configuration, TCP
4//! readiness probes, and long-poll image generation, so every caller
5//! uses the same tuned timeouts, plus [`validate_outbound_url`] — the
6//! single SSRF guard applied to every operator-configured webhook
7//! destination (agent integrations and the governance authz hook).
8
9use std::time::Duration;
10use thiserror::Error;
11
12/// Rejection reason for an operator-configured outbound URL.
13#[derive(Debug, Error)]
14pub enum OutboundUrlError {
15    #[error("invalid url: {0}")]
16    Parse(String),
17    #[error("unsupported url scheme: {0}")]
18    Scheme(String),
19    #[error("http url only permitted for loopback hosts")]
20    NonLoopbackHttp,
21    #[error("host {0} is in a blocked private range")]
22    BlockedHost(String),
23}
24
25pub const HTTP_CONNECT_TIMEOUT: Duration = Duration::from_secs(10);
26
27pub const HTTP_DEFAULT_TIMEOUT: Duration = Duration::from_secs(30);
28
29pub const HTTP_HEALTH_CHECK_TIMEOUT: Duration = Duration::from_secs(5);
30
31pub const HTTP_AUTH_VERIFY_TIMEOUT: Duration = Duration::from_secs(10);
32
33pub const HTTP_SYNC_DEPLOY_TIMEOUT: Duration = Duration::from_secs(60);
34
35pub const HTTP_STREAM_CONNECT_TIMEOUT: Duration = Duration::from_secs(30);
36
37pub const HTTP_KEEPALIVE: Duration = Duration::from_secs(60);
38
39pub const HTTP_POOL_IDLE_TIMEOUT: Duration = Duration::from_secs(90);
40
41pub const AGENT_MONITOR_TCP_TIMEOUT: Duration = Duration::from_secs(15);
42
43pub const AGENT_READINESS_TCP_TIMEOUT: Duration = Duration::from_secs(2);
44
45pub const IMAGE_GEN_LONG_POLL_TIMEOUT: Duration = Duration::from_secs(300);
46
47pub const IMAGE_GEN_OPENAI_TIMEOUT: Duration = Duration::from_secs(120);
48
49/// Default per-attempt timeout for a non-streaming AI provider request.
50pub const AI_PROVIDER_REQUEST_TIMEOUT: Duration = Duration::from_secs(60);
51
52/// Default maximum gap between two chunks of a streaming AI response.
53pub const AI_STREAM_IDLE_TIMEOUT: Duration = Duration::from_secs(60);
54
55/// Default timeout for a single MCP tool-call RPC (excludes connection setup).
56pub const MCP_TOOL_EXECUTION_TIMEOUT: Duration = Duration::from_secs(30);
57
58/// Validate an operator-configured outbound webhook destination, returning the
59/// parsed URL on success.
60///
61/// Rejects destinations that point at the local host or known private network
62/// ranges; these would otherwise let a configured webhook exfiltrate
63/// cloud-metadata endpoints (e.g. `169.254.169.254`) or internal services on
64/// the same subnet. The scheme must be `https` for production destinations;
65/// `http` is allowed only for explicit loopback names used during local
66/// development.
67pub fn validate_outbound_url(url: &str) -> Result<url::Url, OutboundUrlError> {
68    let parsed = url::Url::parse(url).map_err(|e| OutboundUrlError::Parse(e.to_string()))?;
69    let host = parsed
70        .host()
71        .ok_or_else(|| OutboundUrlError::Parse("missing host".to_owned()))?;
72
73    let is_loopback_host = match &host {
74        url::Host::Domain(d) => d.eq_ignore_ascii_case("localhost"),
75        url::Host::Ipv4(ip) => ip.is_loopback(),
76        url::Host::Ipv6(ip) => ip.is_loopback(),
77    };
78
79    match parsed.scheme() {
80        "https" => {},
81        "http" if is_loopback_host => {},
82        "http" => return Err(OutboundUrlError::NonLoopbackHttp),
83        scheme => return Err(OutboundUrlError::Scheme(scheme.to_owned())),
84    }
85
86    if is_loopback_host {
87        return Ok(parsed);
88    }
89
90    let blocked = match host {
91        url::Host::Domain(_) => false,
92        url::Host::Ipv4(ip) => is_blocked_v4(ip),
93        url::Host::Ipv6(ip) => {
94            // RFC 4291 §2.5.5.2: an ::ffff:0:0/96 address embeds a real IPv4
95            // address; treat it as that IPv4 address for SSRF purposes so a
96            // hand-crafted v4-mapped URL cannot bypass the v4 block list.
97            ip.to_ipv4_mapped().map_or_else(
98                || {
99                    let segments = ip.segments();
100                    let is_unique_local = (segments[0] & 0xfe00) == 0xfc00;
101                    let is_link_local = (segments[0] & 0xffc0) == 0xfe80;
102                    ip.is_loopback() || ip.is_unspecified() || is_unique_local || is_link_local
103                },
104                is_blocked_v4,
105            )
106        },
107    };
108    if blocked {
109        return Err(OutboundUrlError::BlockedHost(
110            parsed.host_str().unwrap_or_default().to_owned(),
111        ));
112    }
113    Ok(parsed)
114}
115
116/// RFC 6598 carrier-grade NAT range `100.64.0.0/10` — operator-routable but
117/// commonly bridges to internal services on cloud-provider managed networks.
118fn is_cgnat_shared_v4(ip: std::net::Ipv4Addr) -> bool {
119    let [a, b, _, _] = ip.octets();
120    a == 100 && (64..=127).contains(&b)
121}
122
123fn is_blocked_v4(ip: std::net::Ipv4Addr) -> bool {
124    ip.is_private()
125        || ip.is_loopback()
126        || ip.is_link_local()
127        || ip.is_unspecified()
128        || ip.is_broadcast()
129        || is_cgnat_shared_v4(ip)
130}
systemprompt_models/net.rs

systemprompt_models/
net.rs
