Graham McIntire
55d001d9f8
Each SNMP GET/WALK now runs in a forked child process. If libnetsnmp triggers a SIGSEGV or other fatal signal, only the child dies - the parent agent logs the crash and continues operating for all other devices. Key changes: - C helper: snmp_get_isolated() and snmp_walk_isolated() using fork+pipe pattern with 60s alarm watchdog and mutex-serialized forks - Rust: IsolationMode enum (Fork/Direct) controlled by TOWEROPS_SNMP_ISOLATION env var, defaults to Fork - New CrashRecovered error variant with signal info and logging - Device poller logs crash recovery events at error level - Startup logs active isolation mode Set TOWEROPS_SNMP_ISOLATION=direct to disable isolation for debugging.
42 lines
1.4 KiB
Rust
42 lines
1.4 KiB
Rust
fn main() {
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// Compile protobuf definitions
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prost_build::compile_protos(&["proto/agent.proto"], &["proto/"]).unwrap();
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// Compile C helper for SNMP
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cc::Build::new()
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.file("native/snmp_helper.c")
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.include("native")
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.define("SNMP_HELPER_TEST", None)
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.compile("snmp_helper");
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// Link against netsnmp library
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println!("cargo:rustc-link-lib=netsnmp");
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// On macOS with Homebrew, net-snmp depends on OpenSSL which is keg-only
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// (not linked into /usr/local/lib). Add the OpenSSL library path so the
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// linker can find libcrypto.
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#[cfg(target_os = "macos")]
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{
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if let Ok(output) = std::process::Command::new("brew")
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.args(["--prefix", "openssl@3"])
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.output()
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{
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if output.status.success() {
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let prefix = String::from_utf8_lossy(&output.stdout).trim().to_string();
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println!("cargo:rustc-link-search={}/lib", prefix);
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}
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}
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}
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// Inject compile timestamp as version
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// This allows tracking when a specific agent binary was built
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let version = get_version();
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println!("cargo:rustc-env=BUILD_VERSION={}", version);
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}
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fn get_version() -> String {
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// Generate RFC 3339 timestamp at compile time
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// Format: YYYY-MM-DDTHH:MM:SSZ
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let now = chrono::Utc::now();
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now.format("%Y-%m-%dT%H:%M:%SZ").to_string()
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}
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