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// SPDX-License-Identifier: GPL-3.0-or-later
package socket
import (
"bufio"
"errors"
"fmt"
"net"
"os"
"strings"
"time"
)
type tcpServer struct {
addr string
server net.Listener
rowsNumResp int
}
func (t *tcpServer) Run() (err error) {
t.server, err = net.Listen("tcp", t.addr)
if err != nil {
return
}
return t.handleConnections()
}
func (t *tcpServer) Close() (err error) {
return t.server.Close()
}
func (t *tcpServer) handleConnections() (err error) {
for {
conn, err := t.server.Accept()
if err != nil || conn == nil {
return errors.New("could not accept connection")
}
t.handleConnection(conn)
}
}
func (t *tcpServer) handleConnection(conn net.Conn) {
defer func() { _ = conn.Close() }()
_ = conn.SetDeadline(time.Now().Add(time.Millisecond * 100))
rw := bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn))
_, err := rw.ReadString('\n')
if err != nil {
_, _ = rw.WriteString("failed to read input")
_ = rw.Flush()
} else {
resp := strings.Repeat("pong\n", t.rowsNumResp)
_, _ = rw.WriteString(resp)
_ = rw.Flush()
}
}
type udpServer struct {
addr string
conn *net.UDPConn
rowsNumResp int
}
func (u *udpServer) Run() (err error) {
addr, err := net.ResolveUDPAddr("udp", u.addr)
if err != nil {
return err
}
u.conn, err = net.ListenUDP("udp", addr)
if err != nil {
return
}
u.handleConnections()
return nil
}
func (u *udpServer) Close() (err error) {
return u.conn.Close()
}
func (u *udpServer) handleConnections() {
for {
var buf [2048]byte
_, addr, _ := u.conn.ReadFromUDP(buf[0:])
resp := strings.Repeat("pong\n", u.rowsNumResp)
_, _ = u.conn.WriteToUDP([]byte(resp), addr)
}
}
type unixServer struct {
addr string
conn *net.UnixListener
rowsNumResp int
}
func (u *unixServer) Run() (err error) {
_, _ = os.CreateTemp("/tmp", "testSocketFD")
addr, err := net.ResolveUnixAddr("unix", u.addr)
if err != nil {
return err
}
u.conn, err = net.ListenUnix("unix", addr)
if err != nil {
return
}
go u.handleConnections()
return nil
}
func (u *unixServer) Close() (err error) {
_ = os.Remove(testUnixServerAddress)
return u.conn.Close()
}
func (u *unixServer) handleConnections() {
var conn net.Conn
var err error
conn, err = u.conn.AcceptUnix()
if err != nil {
panic(fmt.Errorf("could not accept connection: %v", err))
}
u.handleConnection(conn)
}
func (u *unixServer) handleConnection(conn net.Conn) {
_ = conn.SetDeadline(time.Now().Add(time.Second))
rw := bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn))
_, err := rw.ReadString('\n')
if err != nil {
_, _ = rw.WriteString("failed to read input")
_ = rw.Flush()
} else {
resp := strings.Repeat("pong\n", u.rowsNumResp)
_, _ = rw.WriteString(resp)
_ = rw.Flush()
}
}
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