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package server
import (
"errors"
"log"
"net"
"sync"
"go.rctt.net/solec/core"
)
type Server struct {
listenAddr string
name string
users map[string]User // TODO: Use full address instead of just name
servers map[string]RemoteServer
channels map[string]*Channel
usersMu sync.RWMutex
serversMu sync.RWMutex
channelsMu sync.RWMutex
Storage Storage
}
func NewServer(listenAddr string, name string, storage Storage) *Server {
return &Server{
listenAddr: listenAddr,
name: name,
users: make(map[string]User),
servers: make(map[string]RemoteServer),
channels: make(map[string]*Channel),
Storage: storage,
}
}
func (s *Server) Start() error {
ln, err := net.Listen("tcp", s.listenAddr)
if err != nil {
return err
}
for {
conn, err := ln.Accept()
if err != nil {
log.Println("cannot listen:", err)
continue
}
log.Println("client connected:", conn.RemoteAddr())
go s.handleConn(conn)
}
}
func (s *Server) AddChannel(name string) {
s.channelsMu.Lock()
defer s.channelsMu.Unlock()
s.channels[name] = NewChannel(name)
log.Println("created channel", name)
}
func (s *Server) handleConn(conn net.Conn) {
defer conn.Close()
cType, err := s.performHandshake(conn)
if err != nil {
log.Println("handshake error:", err)
return
}
switch cType {
case core.ConnTypeUnknown:
log.Println("invalid connection type")
case core.ConnTypeUser:
s.handleUserConn(conn)
case core.ConnTypeServer:
s.handleServerConn(conn)
}
}
func (s *Server) performHandshake(conn net.Conn) (core.ConnType, error) {
serverHs := core.Handshake{0, 2, core.ConnTypeServer}
if err := core.Send(conn, serverHs); err != nil {
return core.ConnTypeUnknown, err
}
clientPayload, err := core.Decode(conn)
if err != nil {
return core.ConnTypeUnknown, err
}
clientHs, ok := clientPayload.(core.Handshake)
if !ok {
return core.ConnTypeUnknown, core.ErrUnexpectedPayloadType
}
if serverHs.Major != clientHs.Major {
return clientHs.ConnType, errors.New("server and client are using different protocol version")
}
return clientHs.ConnType, nil
}
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