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package internal
import (
"bufio"
"context"
"fmt"
"log"
"net"
"time"
)
func startTcpServer(ctx context.Context, config config, ch chan<- vote) error {
listener, err := net.Listen("tcp", config.Address)
if err != nil {
return fmt.Errorf("Error starting TCP server: %s", err.Error())
}
defer listener.Close()
log.Printf("TCP server started on %s\n", config.Address)
for {
conn, err := listener.Accept()
if err != nil {
log.Printf("Error accepting connection: %s\n", err.Error())
continue
}
if !config.isParticipant(conn.RemoteAddr().String()) {
log.Printf("Denying connection, peer not a participant: %v\n", conn.RemoteAddr().String())
conn.Close()
continue
}
log.Printf("Client connected: %s\n", conn.RemoteAddr().String())
go handleConnection(ctx, conn, ch)
}
}
func handleConnection(ctx context.Context, conn net.Conn, ch chan<- vote) {
defer conn.Close()
remoteAddr := conn.RemoteAddr().String()
reader := bufio.NewReader(conn)
for {
select {
case <-ctx.Done():
log.Printf("Server context done, disconnecting client %s\n", remoteAddr)
return
default:
message, err := reader.ReadString('\n')
if err != nil {
log.Printf("Client %s disconnected: %s\n", remoteAddr, err.Error())
return
}
log.Printf("Received message from %s: %s", remoteAddr, message)
ch <- vote{From: remoteAddr, time: time.Now()}
conn.Write([]byte(message))
}
}
}
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