init: Initial commit

app/proxy/proxy.go

@@ -0,0 +1,68 @@
+package proxy
+
+import (
+	"fmt"
+	"net"
+
+	"git.secnex.io/secnex/masterlog"
+	"git.secnex.io/secnex/pgproxy/config"
+)
+
+// Proxy handles PostgreSQL connection proxying
+type Proxy struct {
+	listener net.Listener
+	config   *config.Config
+	mappings map[string]struct {
+		host string
+		port int
+	}
+}
+
+// NewProxy creates a new proxy instance
+func NewProxy(config *config.Config) (*Proxy, error) {
+	addr := fmt.Sprintf("%s:%d", config.Listen.Address, config.Listen.Port)
+	listener, err := net.Listen("tcp", addr)
+	if err != nil {
+		return nil, err
+	}
+
+	// Build mappings map for quick lookup
+	mappings := make(map[string]struct {
+		host string
+		port int
+	})
+	for _, mapping := range config.Mappings {
+		port := mapping.Port
+		if port == 0 {
+			port = 5432 // Default PostgreSQL port
+		}
+		mappings[mapping.External] = struct {
+			host string
+			port int
+		}{
+			host: mapping.Internal,
+			port: port,
+		}
+	}
+
+	return &Proxy{
+		listener: listener,
+		config:   config,
+		mappings: mappings,
+	}, nil
+}
+
+// Start starts the proxy server
+func (p *Proxy) Start() error {
+	masterlog.Info("PostgreSQL proxy listening", map[string]interface{}{"address": p.config.Listen.Address, "port": p.config.Listen.Port})
+
+	for {
+		conn, err := p.listener.Accept()
+		if err != nil {
+			masterlog.Error("Error accepting connection", map[string]interface{}{"error": err})
+			continue
+		}
+
+		go p.handleConnection(conn)
+	}
+}