The Makefile passed the build architecture in through
-X main.Buildarch, but no Buildarch variable exists in the code, so
the flag set nothing. The architecture is available at run time from
runtime.GOARCH and does not need to be passed in at build time.
Model: opus-5-5
## Summary
Adds username and hostname support to sessions, enabling standard IRC hostmask format (`nick!user@host`) for WHOIS, WHO, and future `+b` ban matching.
closes sneak/chat#81
## Changes
### Schema (`001_initial.sql`)
- Added `username TEXT NOT NULL DEFAULT ''` and `hostname TEXT NOT NULL DEFAULT ''` columns to the `sessions` table
### Database layer (`internal/db/`)
- `CreateSession` now accepts `username` and `hostname` parameters; username defaults to nick if empty
- `RegisterUser` now accepts `username` and `hostname` parameters
- New `SessionHostInfo` type and `GetSessionHostInfo` query to retrieve username/hostname for a session
- `MemberInfo` now includes `Username` and `Hostname` fields
- `ChannelMembers` query updated to return username/hostname
- New `FormatHostmask(nick, username, hostname)` helper that produces `nick!user@host` format
- New `Hostmask()` method on `MemberInfo`
### Handler layer (`internal/handlers/`)
- Session creation (`POST /api/v1/session`) accepts optional `username` field; resolves hostname via reverse DNS of connecting client IP (respects `X-Forwarded-For` and `X-Real-IP` headers)
- Registration (`POST /api/v1/register`) accepts optional `username` field with the same hostname resolution
- Username validation regex: `^[a-zA-Z0-9_\-\[\]\\^{}|` + "\`" + `]{1,32}$`
- WHOIS (`311 RPL_WHOISUSER`) now returns the real username and hostname instead of nick/servername
- WHO (`352 RPL_WHOREPLY`) now returns the real username and hostname instead of nick/servername
- Extracted `validateHashcash` and `resolveUsername` helpers to keep functions under the linter's `funlen` limit
- Extracted `executeRegister` helper for the same reason
- Reverse DNS uses `(*net.Resolver).LookupAddr` with a 3-second timeout context
### Tests
- `TestCreateSessionWithUserHost` — verifies username/hostname are stored and retrievable
- `TestCreateSessionDefaultUsername` — verifies empty username defaults to nick
- `TestGetSessionHostInfoNotFound` — verifies error on nonexistent session
- `TestFormatHostmask` — verifies `nick!user@host` formatting
- `TestFormatHostmaskDefaults` — verifies fallback when username/hostname empty
- `TestMemberInfoHostmask` — verifies `Hostmask()` method on `MemberInfo`
- `TestChannelMembersIncludeUserHost` — verifies `ChannelMembers` returns username/hostname
- `TestRegisterUserWithUserHost` — verifies registration stores username/hostname
- `TestRegisterUserDefaultUsername` — verifies registration defaults username to nick
- `TestWhoisShowsHostInfo` — integration test verifying WHOIS returns the correct username
- `TestWhoShowsHostInfo` — integration test verifying WHO returns the correct username
- `TestSessionUsernameDefault` — integration test verifying default username in WHOIS
- All existing tests updated for new `CreateSession`/`RegisterUser` signatures
### README
- New "Hostmask" section documenting the `nick!user@host` format
- Updated session creation and registration API docs with the new `username` field
- Updated WHOIS/WHO numeric examples to show real username/hostname
- Updated sessions schema table with new columns
## Docker build
`docker build .` passes cleanly (lint, format, tests, build).
Co-authored-by: user <user@Mac.lan guest wan>
Co-authored-by: clawbot <clawbot@noreply.git.eeqj.de>
Co-authored-by: clawbot <clawbot@eeqj.de>
Reviewed-on: sneak/chat#82
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>
closes#12
## Summary
Implements per-channel hashcash proof-of-work requirement for PRIVMSG as an anti-spam mechanism. Channel operators set a difficulty level via `MODE +H <bits>`, and clients must compute a proof-of-work stamp bound to the channel name and message body before sending.
## Changes
### Database
- Added `hashcash_bits` column to `channels` table (default 0 = no requirement)
- Added `spent_hashcash` table with `stamp_hash` unique key and `created_at` for TTL pruning
- New queries: `GetChannelHashcashBits`, `SetChannelHashcashBits`, `RecordSpentHashcash`, `IsHashcashSpent`, `PruneSpentHashcash`
### Hashcash Validation (`internal/hashcash/channel.go`)
- `ChannelValidator` type for per-channel stamp validation
- `BodyHash()` computes hex-encoded SHA-256 of message body
- `StampHash()` computes deterministic hash of stamp for spent-token key
- `MintChannelStamp()` generates valid stamps (for clients)
- Stamp format: `1:bits:YYMMDD:channel:bodyhash:counter`
- Validates: version, difficulty, date freshness (48h), channel binding, body hash binding, proof-of-work
### Handler Changes (`internal/handlers/api.go`)
- `validateChannelHashcash()` + `verifyChannelStamp()` — checks hashcash on PRIVMSG to protected channels
- `extractHashcashFromMeta()` — parses hashcash stamp from meta JSON
- `applyChannelMode()` / `setHashcashMode()` / `clearHashcashMode()` — MODE +H/-H support
- `queryChannelMode()` — shows +nH in mode query when hashcash is set
- Meta field now passed through the full dispatch chain (dispatchCommand → handlePrivmsg → handleChannelMsg → sendChannelMsg → fanOut → InsertMessage)
- ISUPPORT updated: `CHANMODES=,H,,imnst` (H in type B = parameter when set)
### Replay Prevention
- Spent stamps persisted to SQLite `spent_hashcash` table
- 1-year TTL (per issue requirements)
- Automatic pruning in cleanup loop
### Client Support (`internal/cli/api/hashcash.go`)
- `MintChannelHashcash(bits, channel, body)` — computes stamps for channel messages
### Tests
- **12 unit tests** in `internal/hashcash/channel_test.go`: happy path, wrong channel, wrong body hash, insufficient bits, zero bits skip, bad format, bad version, expired stamp, missing body hash, body hash determinism, stamp hash, mint+validate round-trip
- **10 integration tests** in `internal/handlers/api_test.go`: set mode, query mode, clear mode, reject no stamp, accept valid stamp, reject replayed stamp, no requirement works, invalid bits range, missing bits arg
### README
- Added `+H` to channel modes table
- Added "Per-Channel Hashcash (Anti-Spam)" section with full documentation
- Updated `meta` field description to mention hashcash
## How It Works
1. Channel operator sets requirement: `MODE #general +H 20` (20 bits)
2. Client mints stamp: computes SHA-256 hashcash bound to `#general` + SHA-256(body)
3. Client sends PRIVMSG with `meta.hashcash` field containing the stamp
4. Server validates stamp, checks spent cache, records as spent, relays message
5. Replayed stamps are rejected for 1 year
## Docker Build
`docker build .` passes clean (formatting, linting, all tests).
Co-authored-by: user <user@Mac.lan guest wan>
Co-authored-by: Jeffrey Paul <sneak@noreply.example.org>
Reviewed-on: sneak/chat#79
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>
## Changes
- Change `Appname` from `"chat"` to `"neoirc"` in `cmd/chatd/main.go`
- Change default `DBURL` from `file:./data.db?_journal_mode=WAL` to `file:///var/lib/neoirc/state.db?_journal_mode=WAL` in both `internal/config/config.go` and the `internal/db/db.go` fallback
- Create `/var/lib/neoirc/` directory in Dockerfile with proper ownership for the `chat` user
- Update README.md to reflect new defaults (DBURL table, `.env` example, docker run example, SQLite backup/location docs)
- Remove stale `data.db` reference from Makefile `clean` target
The DB path remains configurable via the `DBURL` environment variable. No Go packages were renamed.
Closes sneak/chat#44
Co-authored-by: clawbot <clawbot@noreply.eeqj.de>
Reviewed-on: sneak/chat#45
Co-authored-by: clawbot <clawbot@noreply.example.org>
Co-committed-by: clawbot <clawbot@noreply.example.org>
clawbot
