Kyle Isom
564e0a9c67
Configurable maximum concurrent connections per listener. When the limit is reached, new connections are closed immediately after accept. 0 means unlimited (default, preserving existing behavior). Config: Listener gains max_connections field, validated non-negative. DB: Migration 3 adds listeners.max_connections column. UpdateListenerMaxConns method for runtime changes via gRPC. CreateListener updated to persist max_connections on seed. Server: ListenerState/ListenerData gain MaxConnections. Limit checked in serve() after Accept but before handleConn — if ActiveConnections >= MaxConnections, connection is closed and the accept loop continues. SetMaxConnections method for runtime updates. Proto: SetListenerMaxConnections RPC added. ListenerStatus gains max_connections field. Generated code regenerated. gRPC server: SetListenerMaxConnections implements write-through (DB first, then in-memory update). GetStatus includes max_connections. Client: SetListenerMaxConnections method, MaxConnections in ListenerStatus. Tests: DB CRUD and UpdateListenerMaxConns, server connection limit enforcement (accept 2, reject 3rd, close one, accept again), gRPC SetListenerMaxConnections round-trip with DB persistence, not-found error handling. Also updates PROJECT_PLAN.md with phases 6-8 and PROGRESS.md with tracking for the new features. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
66 lines
1.9 KiB
Go
66 lines
1.9 KiB
Go
package db
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import (
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"fmt"
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"strings"
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"git.wntrmute.dev/kyle/mc-proxy/internal/config"
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)
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// Seed populates the database from TOML config data. Only called when the
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// database is empty (first run).
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func (s *Store) Seed(listeners []config.Listener, fw config.Firewall) error {
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tx, err := s.db.Begin()
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if err != nil {
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return fmt.Errorf("beginning seed transaction: %w", err)
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}
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defer tx.Rollback()
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for _, l := range listeners {
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result, err := tx.Exec(
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"INSERT INTO listeners (addr, proxy_protocol, max_connections) VALUES (?, ?, ?)",
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l.Addr, l.ProxyProtocol, l.MaxConnections,
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)
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if err != nil {
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return fmt.Errorf("seeding listener %q: %w", l.Addr, err)
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}
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listenerID, _ := result.LastInsertId()
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for _, r := range l.Routes {
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mode := r.Mode
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if mode == "" {
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mode = "l4"
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}
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_, err := tx.Exec(
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`INSERT INTO routes (listener_id, hostname, backend, mode, tls_cert, tls_key, backend_tls, send_proxy_protocol)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
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listenerID, strings.ToLower(r.Hostname), r.Backend,
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mode, r.TLSCert, r.TLSKey, r.BackendTLS, r.SendProxyProtocol,
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)
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if err != nil {
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return fmt.Errorf("seeding route %q on listener %q: %w", r.Hostname, l.Addr, err)
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}
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}
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}
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for _, ip := range fw.BlockedIPs {
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if _, err := tx.Exec("INSERT INTO firewall_rules (type, value) VALUES ('ip', ?)", ip); err != nil {
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return fmt.Errorf("seeding blocked IP %q: %w", ip, err)
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}
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}
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for _, cidr := range fw.BlockedCIDRs {
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if _, err := tx.Exec("INSERT INTO firewall_rules (type, value) VALUES ('cidr', ?)", cidr); err != nil {
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return fmt.Errorf("seeding blocked CIDR %q: %w", cidr, err)
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}
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}
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for _, code := range fw.BlockedCountries {
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if _, err := tx.Exec("INSERT INTO firewall_rules (type, value) VALUES ('country', ?)", strings.ToUpper(code)); err != nil {
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return fmt.Errorf("seeding blocked country %q: %w", code, err)
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}
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}
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return tx.Commit()
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}
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