- Add trap.rs with BER/ASN.1 parser for SNMP trap PDUs
- Support both SNMPv1 and SNMPv2c trap formats
- Listen on configurable UDP port (default 162)
- Log received traps at INFO level
- Add LOG_LEVEL env var for log verbosity control
- Add TRAP_PORT env var and CLI flag
- Update docker-compose with trap port mapping
- Replace raw ICMP socket implementation with system ping command
- Add regex-lite dependency for parsing ping output
- Add tokio process feature for async command execution
- Support macOS and Linux ping output formats
- Add iputils to Dockerfile for setuid-root ping
- Remove socket2 dependency (no longer needed)
This eliminates the need for CAP_NET_RAW capability in containers.
- Added custom logging macros (log_error!, log_warn!, log_info!, log_debug!)
- Implemented LogLevel enum and LOG_LEVEL static for runtime level control
- Exported macros with #[macro_export] for use across all modules
- Replaced all log:: calls in websocket_client.rs, health.rs, and version.rs
- Removed obsolete test code referencing old log crate
- Removed log dependency from Cargo.toml
- Fixed useless comparison warning in test
- Binary size: still 1.5M (no change - log was lightweight)
- Tests: 65 passing, 0 warnings
This completes the removal of 9 dependencies (thiserror, hostname, chrono,
base64, rand, ureq, tiny_http, anyhow, log). Dependency count: 19 → 10.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Added custom logging macros to main.rs to prepare for removing the
log crate dependency:
- Added LogLevel enum and LOG_LEVEL static
- Created log_error!, log_warn!, log_info!, log_debug! macros
- Replaced log calls in main.rs with custom macros
- Made format_timestamp() public for use in macros
Still TODO:
- Update websocket_client.rs, health.rs, version.rs
- Remove log from Cargo.toml
This is work in progress toward removing more dependencies.
Problem:
- Rust agent was experiencing frequent SNMP timeouts
- 5-second timeout is too aggressive for slow devices or congested networks
- Phoenix app uses 30-second timeout with better reliability
Solution:
- Increased SNMP_TIMEOUT_SECS constant from 5 to 30 seconds
- Applied to both get() and walk() operations
- Now matches Phoenix application timeout configuration
Benefits:
- Reduces false positive timeout errors
- Better handling of slow network devices
- Consistent timeout behavior across Elixir and Rust pollers
- Maintains reliability during network congestion
Note: SNMP timeout is per-request. Total polling time may still be
limited by Task::spawn_blocking timeout in poller executor (40s).
🤖 Generated with Claude Code
Removed dependencies and replaced with custom code:
- thiserror: Not used (only pulled by tokio-tungstenite)
- hostname: Replaced with /proc/sys/kernel/hostname reader
- chrono: Replaced with std::time::SystemTime + custom formatting
- base64: Replaced with custom base64 encoder/decoder
Benefits:
- Binary size: 2.4M → 2.3M (100KB reduction)
- Reduced dependency count: 19 → 15 direct dependencies
- Added 7 new tests (73 → 80 total tests)
- All tests pass
Custom implementations:
- format_timestamp(): YYYY-MM-DD HH:MM:SS.mmm format
- get_hostname(): Read from /proc/sys/kernel/hostname
- get_uptime_seconds(): Read from /proc/uptime
- base64_encode/decode(): Standard base64 encoding
No functionality changes, all existing features work identically.
The agent version was always showing 0.1.0 because build.rs tried to
run 'git describe' inside the Docker build, but .git directory wasn't
copied into the image.
Changes:
- Add VERSION build arg to Dockerfile
- Pass VERSION as env var to cargo build commands
- Update GitLab CI to pass --build-arg VERSION
- Modify build.rs to prefer BUILD_VERSION env var over git commands
This ensures the version displayed by the agent matches the Docker
image tag it was built with.
When using SOCK_DGRAM for ICMP on Linux, the kernel manages the
identifier field and may overwrite the value we set. This causes
validation failures when we receive replies with kernel-assigned
identifiers.
The fix is to only validate:
- Type (0 = ECHO REPLY)
- Code (0)
- Sequence number (matches our random value)
The sequence number is sufficient for uniqueness given our polling
intervals (300+ seconds per device). This is the standard approach
for DGRAM ICMP sockets.
The agent uses WebSocket streaming instead of SQLite buffering,
so rusqlite is not needed. Removing it reduces compile time and
simplifies the dependency tree.
The diagnostic error message was reading ICMP fields from the wrong
offset when an IP header was present. It was showing bytes from the
IP header instead of the actual ICMP identifier and sequence fields.
Now properly detects and skips IP header before extracting ICMP
fields for diagnostic output. Also added total packet length to help
distinguish between raw ICMP and IP-wrapped packets.
Example before:
Invalid ICMP reply packet (expected id=24079, seq=12918):
type=0 code=0 id=29 seq=12918 len=21
(id=29 was reading from IP header, not ICMP)
Example after:
Invalid ICMP reply packet (expected id=24079, seq=12918):
type=0 code=0 id=24079 seq=12918 len=21 (total=41)
(now correctly shows ICMP identifier)
