2020-03-13 17:13:03 +00:00
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package soju
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2020-02-06 15:18:19 +00:00
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import (
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2020-03-12 20:28:09 +00:00
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"crypto/tls"
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2020-02-06 15:18:19 +00:00
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"fmt"
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"io"
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"net"
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2020-02-07 10:46:44 +00:00
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"strings"
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2020-03-16 13:28:45 +00:00
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"sync"
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2020-03-12 20:28:09 +00:00
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"time"
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2020-02-06 15:18:19 +00:00
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2020-03-11 18:09:32 +00:00
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"golang.org/x/crypto/bcrypt"
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2020-02-06 15:18:19 +00:00
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"gopkg.in/irc.v3"
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)
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type ircError struct {
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Message *irc.Message
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}
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2020-03-11 18:09:32 +00:00
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func (err ircError) Error() string {
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return err.Message.String()
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}
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2020-02-06 15:18:19 +00:00
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func newUnknownCommandError(cmd string) ircError {
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return ircError{&irc.Message{
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Command: irc.ERR_UNKNOWNCOMMAND,
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Params: []string{
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"*",
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cmd,
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"Unknown command",
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},
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}}
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}
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func newNeedMoreParamsError(cmd string) ircError {
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return ircError{&irc.Message{
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Command: irc.ERR_NEEDMOREPARAMS,
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Params: []string{
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"*",
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cmd,
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"Not enough parameters",
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},
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}}
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}
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2020-03-11 18:09:32 +00:00
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var errAuthFailed = ircError{&irc.Message{
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Command: irc.ERR_PASSWDMISMATCH,
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Params: []string{"*", "Invalid username or password"},
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}}
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2020-02-06 15:18:19 +00:00
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2020-03-16 13:05:48 +00:00
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type ringMessage struct {
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2020-02-19 17:25:19 +00:00
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consumer *RingConsumer
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upstreamConn *upstreamConn
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}
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2020-02-06 15:18:19 +00:00
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type downstreamConn struct {
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2020-02-19 17:25:19 +00:00
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net net.Conn
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irc *irc.Conn
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srv *Server
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logger Logger
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2020-03-16 10:26:54 +00:00
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outgoing chan *irc.Message
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2020-03-16 13:05:48 +00:00
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ringMessages chan ringMessage
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2020-02-19 17:25:19 +00:00
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closed chan struct{}
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2020-02-06 20:11:35 +00:00
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2020-03-16 08:32:18 +00:00
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registered bool
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user *user
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nick string
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username string
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rawUsername string
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realname string
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password string // empty after authentication
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network *network // can be nil
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2020-03-16 13:28:45 +00:00
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lock sync.Mutex
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ourMessages map[*irc.Message]struct{}
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2020-02-06 15:18:19 +00:00
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}
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2020-02-06 20:11:35 +00:00
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func newDownstreamConn(srv *Server, netConn net.Conn) *downstreamConn {
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2020-02-17 11:36:42 +00:00
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dc := &downstreamConn{
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2020-02-19 17:25:19 +00:00
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net: netConn,
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irc: irc.NewConn(netConn),
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srv: srv,
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logger: &prefixLogger{srv.Logger, fmt.Sprintf("downstream %q: ", netConn.RemoteAddr())},
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2020-03-16 10:26:54 +00:00
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outgoing: make(chan *irc.Message, 64),
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2020-03-16 13:05:48 +00:00
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ringMessages: make(chan ringMessage),
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2020-02-19 17:25:19 +00:00
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closed: make(chan struct{}),
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2020-03-16 13:28:45 +00:00
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ourMessages: make(map[*irc.Message]struct{}),
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2020-02-06 20:11:35 +00:00
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}
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2020-02-06 20:52:04 +00:00
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go func() {
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2020-02-17 11:41:27 +00:00
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if err := dc.writeMessages(); err != nil {
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dc.logger.Printf("failed to write message: %v", err)
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2020-02-06 20:52:04 +00:00
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}
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2020-02-17 11:36:42 +00:00
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if err := dc.net.Close(); err != nil {
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dc.logger.Printf("failed to close connection: %v", err)
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2020-02-07 11:42:24 +00:00
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} else {
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2020-02-17 11:36:42 +00:00
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dc.logger.Printf("connection closed")
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2020-02-07 11:42:24 +00:00
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}
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2020-02-06 20:52:04 +00:00
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}()
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2020-02-17 11:36:42 +00:00
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return dc
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2020-02-06 20:11:35 +00:00
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}
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2020-02-17 11:36:42 +00:00
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func (dc *downstreamConn) prefix() *irc.Prefix {
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2020-02-06 21:19:31 +00:00
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return &irc.Prefix{
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2020-02-17 11:36:42 +00:00
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Name: dc.nick,
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User: dc.username,
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2020-02-06 21:19:31 +00:00
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// TODO: fill the host?
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}
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}
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2020-02-19 17:25:19 +00:00
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func (dc *downstreamConn) marshalChannel(uc *upstreamConn, name string) string {
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return name
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}
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2020-03-12 18:17:06 +00:00
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func (dc *downstreamConn) forEachNetwork(f func(*network)) {
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if dc.network != nil {
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f(dc.network)
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} else {
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dc.user.forEachNetwork(f)
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}
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}
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2020-03-04 14:44:13 +00:00
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func (dc *downstreamConn) forEachUpstream(f func(*upstreamConn)) {
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dc.user.forEachUpstream(func(uc *upstreamConn) {
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2020-03-04 17:22:58 +00:00
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if dc.network != nil && uc.network != dc.network {
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2020-03-04 14:44:13 +00:00
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return
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}
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f(uc)
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})
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}
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2020-03-12 17:33:03 +00:00
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// upstream returns the upstream connection, if any. If there are zero or if
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// there are multiple upstream connections, it returns nil.
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func (dc *downstreamConn) upstream() *upstreamConn {
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if dc.network == nil {
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return nil
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}
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var upstream *upstreamConn
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dc.forEachUpstream(func(uc *upstreamConn) {
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upstream = uc
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})
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return upstream
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}
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2020-02-19 17:25:19 +00:00
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func (dc *downstreamConn) unmarshalChannel(name string) (*upstreamConn, string, error) {
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2020-03-12 17:33:03 +00:00
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if uc := dc.upstream(); uc != nil {
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return uc, name, nil
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}
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2020-03-04 14:44:13 +00:00
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// TODO: extract network name from channel name if dc.upstream == nil
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var channel *upstreamChannel
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var err error
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dc.forEachUpstream(func(uc *upstreamConn) {
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if err != nil {
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return
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}
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if ch, ok := uc.channels[name]; ok {
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if channel != nil {
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err = fmt.Errorf("ambiguous channel name %q", name)
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} else {
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channel = ch
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}
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}
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})
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if channel == nil {
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return nil, "", ircError{&irc.Message{
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Command: irc.ERR_NOSUCHCHANNEL,
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Params: []string{name, "No such channel"},
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}}
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2020-02-19 17:25:19 +00:00
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}
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2020-03-04 14:44:13 +00:00
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return channel.conn, channel.Name, nil
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2020-02-19 17:25:19 +00:00
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}
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func (dc *downstreamConn) marshalNick(uc *upstreamConn, nick string) string {
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if nick == uc.nick {
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return dc.nick
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}
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return nick
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}
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func (dc *downstreamConn) marshalUserPrefix(uc *upstreamConn, prefix *irc.Prefix) *irc.Prefix {
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if prefix.Name == uc.nick {
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return dc.prefix()
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}
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return prefix
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}
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2020-02-17 14:46:29 +00:00
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func (dc *downstreamConn) isClosed() bool {
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select {
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case <-dc.closed:
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return true
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default:
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return false
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}
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}
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2020-03-16 11:44:59 +00:00
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func (dc *downstreamConn) readMessages(ch chan<- downstreamIncomingMessage) error {
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2020-02-17 11:36:42 +00:00
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dc.logger.Printf("new connection")
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2020-02-06 20:11:35 +00:00
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for {
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2020-02-17 11:36:42 +00:00
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msg, err := dc.irc.ReadMessage()
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2020-02-06 20:11:35 +00:00
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if err == io.EOF {
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break
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} else if err != nil {
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return fmt.Errorf("failed to read IRC command: %v", err)
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}
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2020-02-18 15:31:18 +00:00
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if dc.srv.Debug {
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dc.logger.Printf("received: %v", msg)
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}
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2020-03-16 11:44:59 +00:00
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ch <- downstreamIncomingMessage{msg, dc}
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2020-02-06 20:11:35 +00:00
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}
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2020-02-07 11:42:24 +00:00
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return nil
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2020-02-06 20:11:35 +00:00
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}
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2020-02-17 11:41:27 +00:00
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func (dc *downstreamConn) writeMessages() error {
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2020-02-17 14:46:29 +00:00
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for {
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var err error
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var closed bool
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select {
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2020-03-16 10:26:54 +00:00
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case msg := <-dc.outgoing:
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2020-02-18 15:31:18 +00:00
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if dc.srv.Debug {
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dc.logger.Printf("sent: %v", msg)
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}
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2020-02-17 14:46:29 +00:00
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err = dc.irc.WriteMessage(msg)
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2020-03-16 13:05:48 +00:00
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case ringMessage := <-dc.ringMessages:
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consumer, uc := ringMessage.consumer, ringMessage.upstreamConn
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2020-02-17 14:46:29 +00:00
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for {
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msg := consumer.Peek()
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if msg == nil {
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break
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}
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2020-03-16 13:28:45 +00:00
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dc.lock.Lock()
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_, ours := dc.ourMessages[msg]
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delete(dc.ourMessages, msg)
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dc.lock.Unlock()
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if ours {
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// The message comes from our connection, don't echo it
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// back
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continue
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}
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2020-02-19 17:25:19 +00:00
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msg = msg.Copy()
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switch msg.Command {
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case "PRIVMSG":
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// TODO: detect whether it's a user or a channel
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msg.Params[0] = dc.marshalChannel(uc, msg.Params[0])
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default:
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panic("expected to consume a PRIVMSG message")
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}
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2020-02-18 15:31:18 +00:00
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if dc.srv.Debug {
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dc.logger.Printf("sent: %v", msg)
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}
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2020-02-17 14:46:29 +00:00
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err = dc.irc.WriteMessage(msg)
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if err != nil {
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break
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}
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consumer.Consume()
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}
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case <-dc.closed:
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closed = true
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}
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if err != nil {
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2020-02-17 11:41:27 +00:00
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return err
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}
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2020-02-17 14:46:29 +00:00
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if closed {
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break
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}
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2020-02-17 11:41:27 +00:00
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}
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return nil
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}
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2020-02-17 11:36:42 +00:00
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func (dc *downstreamConn) Close() error {
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2020-02-17 14:46:29 +00:00
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if dc.isClosed() {
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2020-02-06 20:52:04 +00:00
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return fmt.Errorf("downstream connection already closed")
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}
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2020-02-07 10:56:36 +00:00
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2020-02-17 11:36:42 +00:00
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if u := dc.user; u != nil {
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2020-02-07 10:56:36 +00:00
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u.lock.Lock()
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for i := range u.downstreamConns {
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2020-02-17 11:36:42 +00:00
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if u.downstreamConns[i] == dc {
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2020-02-07 10:56:36 +00:00
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u.downstreamConns = append(u.downstreamConns[:i], u.downstreamConns[i+1:]...)
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2020-02-18 14:08:06 +00:00
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break
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2020-02-07 10:56:36 +00:00
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}
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}
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u.lock.Unlock()
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2020-02-06 15:18:19 +00:00
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}
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2020-02-07 10:56:36 +00:00
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2020-02-17 14:46:29 +00:00
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close(dc.closed)
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2020-02-07 11:42:24 +00:00
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return nil
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2020-02-06 15:18:19 +00:00
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}
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2020-02-17 11:36:42 +00:00
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func (dc *downstreamConn) SendMessage(msg *irc.Message) {
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2020-03-16 10:26:54 +00:00
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dc.outgoing <- msg
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2020-02-17 11:27:48 +00:00
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}
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2020-02-17 11:36:42 +00:00
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func (dc *downstreamConn) handleMessage(msg *irc.Message) error {
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2020-02-06 15:18:19 +00:00
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switch msg.Command {
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2020-02-06 21:22:14 +00:00
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case "QUIT":
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2020-02-17 11:36:42 +00:00
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return dc.Close()
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2020-02-06 15:18:19 +00:00
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default:
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2020-02-17 11:36:42 +00:00
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if dc.registered {
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return dc.handleMessageRegistered(msg)
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2020-02-06 15:18:19 +00:00
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} else {
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2020-02-17 11:36:42 +00:00
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return dc.handleMessageUnregistered(msg)
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2020-02-06 15:18:19 +00:00
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}
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}
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}
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2020-02-17 11:36:42 +00:00
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func (dc *downstreamConn) handleMessageUnregistered(msg *irc.Message) error {
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2020-02-06 15:18:19 +00:00
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switch msg.Command {
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case "NICK":
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2020-02-17 11:36:42 +00:00
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if err := parseMessageParams(msg, &dc.nick); err != nil {
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2020-02-07 11:36:02 +00:00
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return err
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2020-02-06 15:18:19 +00:00
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}
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case "USER":
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2020-02-07 11:36:02 +00:00
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var username string
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2020-02-17 11:36:42 +00:00
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if err := parseMessageParams(msg, &username, nil, nil, &dc.realname); err != nil {
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2020-02-07 11:36:02 +00:00
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return err
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2020-02-06 15:18:19 +00:00
|
|
|
}
|
2020-03-16 08:32:18 +00:00
|
|
|
dc.rawUsername = username
|
2020-03-11 18:09:32 +00:00
|
|
|
case "PASS":
|
|
|
|
if err := parseMessageParams(msg, &dc.password); err != nil {
|
|
|
|
return err
|
|
|
|
}
|
2020-02-06 15:18:19 +00:00
|
|
|
default:
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.logger.Printf("unhandled message: %v", msg)
|
2020-02-06 15:18:19 +00:00
|
|
|
return newUnknownCommandError(msg.Command)
|
|
|
|
}
|
2020-03-16 08:32:18 +00:00
|
|
|
if dc.rawUsername != "" && dc.nick != "" {
|
2020-02-17 11:36:42 +00:00
|
|
|
return dc.register()
|
2020-02-06 15:18:19 +00:00
|
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2020-03-12 20:28:09 +00:00
|
|
|
func sanityCheckServer(addr string) error {
|
|
|
|
dialer := net.Dialer{Timeout: 30 * time.Second}
|
|
|
|
conn, err := tls.DialWithDialer(&dialer, "tcp", addr, nil)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
return conn.Close()
|
|
|
|
}
|
|
|
|
|
2020-02-17 11:36:42 +00:00
|
|
|
func (dc *downstreamConn) register() error {
|
2020-03-16 08:32:18 +00:00
|
|
|
username := dc.rawUsername
|
2020-03-04 17:22:58 +00:00
|
|
|
var networkName string
|
2020-03-04 14:44:13 +00:00
|
|
|
if i := strings.LastIndexAny(username, "/@"); i >= 0 {
|
2020-03-04 17:22:58 +00:00
|
|
|
networkName = username[i+1:]
|
2020-03-04 14:44:13 +00:00
|
|
|
}
|
|
|
|
if i := strings.IndexAny(username, "/@"); i >= 0 {
|
|
|
|
username = username[:i]
|
|
|
|
}
|
2020-03-16 08:32:18 +00:00
|
|
|
dc.username = "~" + username
|
2020-03-04 14:44:13 +00:00
|
|
|
|
2020-03-11 18:09:32 +00:00
|
|
|
password := dc.password
|
|
|
|
dc.password = ""
|
|
|
|
|
2020-03-04 14:44:13 +00:00
|
|
|
u := dc.srv.getUser(username)
|
2020-02-07 10:39:56 +00:00
|
|
|
if u == nil {
|
2020-03-11 18:09:32 +00:00
|
|
|
dc.logger.Printf("failed authentication for %q: unknown username", username)
|
|
|
|
return errAuthFailed
|
|
|
|
}
|
|
|
|
|
|
|
|
err := bcrypt.CompareHashAndPassword([]byte(u.Password), []byte(password))
|
|
|
|
if err != nil {
|
|
|
|
dc.logger.Printf("failed authentication for %q: %v", username, err)
|
|
|
|
return errAuthFailed
|
2020-02-07 10:36:42 +00:00
|
|
|
}
|
|
|
|
|
2020-03-12 17:21:41 +00:00
|
|
|
var network *network
|
2020-03-04 17:22:58 +00:00
|
|
|
if networkName != "" {
|
2020-03-12 17:21:41 +00:00
|
|
|
network = u.getNetwork(networkName)
|
|
|
|
if network == nil {
|
2020-03-12 20:28:09 +00:00
|
|
|
addr := networkName
|
|
|
|
if !strings.ContainsRune(addr, ':') {
|
|
|
|
addr = addr + ":6697"
|
|
|
|
}
|
|
|
|
|
2020-03-13 14:12:44 +00:00
|
|
|
dc.logger.Printf("trying to connect to new network %q", addr)
|
2020-03-12 20:28:09 +00:00
|
|
|
if err := sanityCheckServer(addr); err != nil {
|
|
|
|
dc.logger.Printf("failed to connect to %q: %v", addr, err)
|
|
|
|
return ircError{&irc.Message{
|
|
|
|
Command: irc.ERR_PASSWDMISMATCH,
|
|
|
|
Params: []string{"*", fmt.Sprintf("Failed to connect to %q", networkName)},
|
|
|
|
}}
|
|
|
|
}
|
|
|
|
|
2020-03-13 14:12:44 +00:00
|
|
|
dc.logger.Printf("auto-saving network %q", networkName)
|
2020-03-12 20:28:09 +00:00
|
|
|
network, err = u.createNetwork(networkName, dc.nick)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
2020-03-04 14:44:13 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.registered = true
|
|
|
|
dc.user = u
|
2020-03-12 17:21:41 +00:00
|
|
|
dc.network = network
|
2020-02-06 15:18:19 +00:00
|
|
|
|
2020-02-07 10:56:36 +00:00
|
|
|
u.lock.Lock()
|
2020-02-17 14:46:29 +00:00
|
|
|
firstDownstream := len(u.downstreamConns) == 0
|
2020-02-17 11:36:42 +00:00
|
|
|
u.downstreamConns = append(u.downstreamConns, dc)
|
2020-02-07 10:56:36 +00:00
|
|
|
u.lock.Unlock()
|
|
|
|
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
2020-02-06 15:18:19 +00:00
|
|
|
Command: irc.RPL_WELCOME,
|
2020-03-13 17:13:03 +00:00
|
|
|
Params: []string{dc.nick, "Welcome to soju, " + dc.nick},
|
2020-02-17 11:27:48 +00:00
|
|
|
})
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
2020-02-06 15:18:19 +00:00
|
|
|
Command: irc.RPL_YOURHOST,
|
2020-02-17 11:36:42 +00:00
|
|
|
Params: []string{dc.nick, "Your host is " + dc.srv.Hostname},
|
2020-02-17 11:27:48 +00:00
|
|
|
})
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
2020-02-06 15:18:19 +00:00
|
|
|
Command: irc.RPL_CREATED,
|
2020-02-17 11:36:42 +00:00
|
|
|
Params: []string{dc.nick, "Who cares when the server was created?"},
|
2020-02-17 11:27:48 +00:00
|
|
|
})
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
2020-02-06 15:18:19 +00:00
|
|
|
Command: irc.RPL_MYINFO,
|
2020-03-13 17:13:03 +00:00
|
|
|
Params: []string{dc.nick, dc.srv.Hostname, "soju", "aiwroO", "OovaimnqpsrtklbeI"},
|
2020-02-17 11:27:48 +00:00
|
|
|
})
|
2020-03-13 11:06:02 +00:00
|
|
|
// TODO: RPL_ISUPPORT
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
2020-02-06 15:18:19 +00:00
|
|
|
Command: irc.ERR_NOMOTD,
|
2020-02-17 11:36:42 +00:00
|
|
|
Params: []string{dc.nick, "No MOTD"},
|
2020-02-17 11:27:48 +00:00
|
|
|
})
|
2020-02-06 15:18:19 +00:00
|
|
|
|
2020-03-04 14:44:13 +00:00
|
|
|
dc.forEachUpstream(func(uc *upstreamConn) {
|
2020-02-06 21:29:24 +00:00
|
|
|
for _, ch := range uc.channels {
|
|
|
|
if ch.complete {
|
2020-02-17 11:36:42 +00:00
|
|
|
forwardChannel(dc, ch)
|
2020-02-06 21:29:24 +00:00
|
|
|
}
|
|
|
|
}
|
2020-02-07 15:43:14 +00:00
|
|
|
|
2020-03-04 14:44:13 +00:00
|
|
|
historyName := dc.username
|
2020-02-17 14:46:29 +00:00
|
|
|
|
|
|
|
var seqPtr *uint64
|
|
|
|
if firstDownstream {
|
|
|
|
seq, ok := uc.history[historyName]
|
|
|
|
if ok {
|
|
|
|
seqPtr = &seq
|
2020-02-07 15:43:14 +00:00
|
|
|
}
|
|
|
|
}
|
2020-02-17 14:46:29 +00:00
|
|
|
|
2020-02-17 15:09:35 +00:00
|
|
|
consumer, ch := uc.ring.NewConsumer(seqPtr)
|
2020-02-17 14:46:29 +00:00
|
|
|
go func() {
|
|
|
|
for {
|
|
|
|
var closed bool
|
|
|
|
select {
|
|
|
|
case <-ch:
|
2020-03-16 13:05:48 +00:00
|
|
|
dc.ringMessages <- ringMessage{consumer, uc}
|
2020-02-17 14:46:29 +00:00
|
|
|
case <-dc.closed:
|
|
|
|
closed = true
|
|
|
|
}
|
|
|
|
if closed {
|
|
|
|
break
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
seq := consumer.Close()
|
|
|
|
|
|
|
|
dc.user.lock.Lock()
|
|
|
|
lastDownstream := len(dc.user.downstreamConns) == 0
|
|
|
|
dc.user.lock.Unlock()
|
|
|
|
|
|
|
|
if lastDownstream {
|
|
|
|
uc.history[historyName] = seq
|
|
|
|
}
|
|
|
|
}()
|
2020-02-07 10:46:44 +00:00
|
|
|
})
|
2020-02-07 15:43:14 +00:00
|
|
|
|
2020-02-06 15:18:19 +00:00
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2020-03-16 11:44:59 +00:00
|
|
|
func (dc *downstreamConn) runUntilRegistered() error {
|
|
|
|
for !dc.registered {
|
|
|
|
msg, err := dc.irc.ReadMessage()
|
2020-03-16 13:30:49 +00:00
|
|
|
if err != nil {
|
2020-03-16 11:44:59 +00:00
|
|
|
return fmt.Errorf("failed to read IRC command: %v", err)
|
|
|
|
}
|
|
|
|
|
|
|
|
err = dc.handleMessage(msg)
|
|
|
|
if ircErr, ok := err.(ircError); ok {
|
|
|
|
ircErr.Message.Prefix = dc.srv.prefix()
|
|
|
|
dc.SendMessage(ircErr.Message)
|
|
|
|
} else if err != nil {
|
|
|
|
return fmt.Errorf("failed to handle IRC command %q: %v", msg, err)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
2020-02-17 11:36:42 +00:00
|
|
|
func (dc *downstreamConn) handleMessageRegistered(msg *irc.Message) error {
|
2020-02-06 15:18:19 +00:00
|
|
|
switch msg.Command {
|
2020-03-16 13:32:38 +00:00
|
|
|
case "PING":
|
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
|
|
|
Command: "PONG",
|
|
|
|
Params: msg.Params,
|
|
|
|
})
|
|
|
|
return nil
|
2020-02-07 11:19:42 +00:00
|
|
|
case "USER":
|
2020-02-06 15:18:19 +00:00
|
|
|
return ircError{&irc.Message{
|
|
|
|
Command: irc.ERR_ALREADYREGISTERED,
|
2020-02-17 11:36:42 +00:00
|
|
|
Params: []string{dc.nick, "You may not reregister"},
|
2020-02-06 15:18:19 +00:00
|
|
|
}}
|
2020-02-07 11:19:42 +00:00
|
|
|
case "NICK":
|
2020-03-12 18:17:06 +00:00
|
|
|
var nick string
|
|
|
|
if err := parseMessageParams(msg, &nick); err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
var err error
|
|
|
|
dc.forEachNetwork(func(n *network) {
|
|
|
|
if err != nil {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
n.Nick = nick
|
|
|
|
err = dc.srv.db.StoreNetwork(dc.user.Username, &n.Network)
|
|
|
|
})
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
2020-03-04 14:44:13 +00:00
|
|
|
dc.forEachUpstream(func(uc *upstreamConn) {
|
2020-02-17 15:17:31 +00:00
|
|
|
uc.SendMessage(msg)
|
2020-02-07 11:19:42 +00:00
|
|
|
})
|
2020-02-19 17:25:19 +00:00
|
|
|
case "JOIN", "PART":
|
2020-02-07 12:36:32 +00:00
|
|
|
var name string
|
|
|
|
if err := parseMessageParams(msg, &name); err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
2020-02-19 17:25:19 +00:00
|
|
|
uc, upstreamName, err := dc.unmarshalChannel(name)
|
2020-02-07 12:36:32 +00:00
|
|
|
if err != nil {
|
2020-02-19 17:25:19 +00:00
|
|
|
return ircError{&irc.Message{
|
|
|
|
Command: irc.ERR_NOSUCHCHANNEL,
|
|
|
|
Params: []string{name, err.Error()},
|
|
|
|
}}
|
2020-02-07 12:36:32 +00:00
|
|
|
}
|
|
|
|
|
2020-02-19 17:25:19 +00:00
|
|
|
uc.SendMessage(&irc.Message{
|
|
|
|
Command: msg.Command,
|
|
|
|
Params: []string{upstreamName},
|
|
|
|
})
|
2020-03-12 17:33:03 +00:00
|
|
|
|
|
|
|
switch msg.Command {
|
|
|
|
case "JOIN":
|
|
|
|
err := dc.srv.db.StoreChannel(uc.network.ID, &Channel{
|
|
|
|
Name: upstreamName,
|
|
|
|
})
|
|
|
|
if err != nil {
|
|
|
|
dc.logger.Printf("failed to create channel %q in DB: %v", upstreamName, err)
|
|
|
|
}
|
|
|
|
case "PART":
|
|
|
|
if err := dc.srv.db.DeleteChannel(uc.network.ID, upstreamName); err != nil {
|
|
|
|
dc.logger.Printf("failed to delete channel %q in DB: %v", upstreamName, err)
|
|
|
|
}
|
|
|
|
}
|
2020-02-07 12:08:27 +00:00
|
|
|
case "MODE":
|
2020-02-19 17:25:19 +00:00
|
|
|
if msg.Prefix == nil {
|
|
|
|
return fmt.Errorf("missing prefix")
|
|
|
|
}
|
|
|
|
|
2020-02-07 12:08:27 +00:00
|
|
|
var name string
|
|
|
|
if err := parseMessageParams(msg, &name); err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
var modeStr string
|
|
|
|
if len(msg.Params) > 1 {
|
|
|
|
modeStr = msg.Params[1]
|
|
|
|
}
|
|
|
|
|
|
|
|
if msg.Prefix.Name != name {
|
2020-02-19 17:25:19 +00:00
|
|
|
uc, upstreamName, err := dc.unmarshalChannel(name)
|
2020-02-07 12:08:27 +00:00
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
if modeStr != "" {
|
2020-02-19 17:25:19 +00:00
|
|
|
uc.SendMessage(&irc.Message{
|
|
|
|
Command: "MODE",
|
|
|
|
Params: []string{upstreamName, modeStr},
|
|
|
|
})
|
2020-02-07 12:08:27 +00:00
|
|
|
} else {
|
2020-02-19 17:25:19 +00:00
|
|
|
ch, ok := uc.channels[upstreamName]
|
|
|
|
if !ok {
|
|
|
|
return ircError{&irc.Message{
|
|
|
|
Command: irc.ERR_NOSUCHCHANNEL,
|
|
|
|
Params: []string{name, "No such channel"},
|
|
|
|
}}
|
|
|
|
}
|
|
|
|
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
2020-02-07 12:08:27 +00:00
|
|
|
Command: irc.RPL_CHANNELMODEIS,
|
2020-02-19 17:25:19 +00:00
|
|
|
Params: []string{name, string(ch.modes)},
|
2020-02-17 11:27:48 +00:00
|
|
|
})
|
2020-02-07 12:08:27 +00:00
|
|
|
}
|
|
|
|
} else {
|
2020-02-17 11:36:42 +00:00
|
|
|
if name != dc.nick {
|
2020-02-07 12:08:27 +00:00
|
|
|
return ircError{&irc.Message{
|
|
|
|
Command: irc.ERR_USERSDONTMATCH,
|
2020-02-17 11:36:42 +00:00
|
|
|
Params: []string{dc.nick, "Cannot change mode for other users"},
|
2020-02-07 12:08:27 +00:00
|
|
|
}}
|
|
|
|
}
|
|
|
|
|
|
|
|
if modeStr != "" {
|
2020-03-04 14:44:13 +00:00
|
|
|
dc.forEachUpstream(func(uc *upstreamConn) {
|
2020-02-19 17:25:19 +00:00
|
|
|
uc.SendMessage(&irc.Message{
|
|
|
|
Command: "MODE",
|
|
|
|
Params: []string{uc.nick, modeStr},
|
|
|
|
})
|
2020-02-07 12:08:27 +00:00
|
|
|
})
|
|
|
|
} else {
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.SendMessage(&irc.Message{
|
|
|
|
Prefix: dc.srv.prefix(),
|
2020-02-07 12:08:27 +00:00
|
|
|
Command: irc.RPL_UMODEIS,
|
|
|
|
Params: []string{""}, // TODO
|
2020-02-17 11:27:48 +00:00
|
|
|
})
|
2020-02-07 12:08:27 +00:00
|
|
|
}
|
|
|
|
}
|
2020-02-17 14:56:18 +00:00
|
|
|
case "PRIVMSG":
|
|
|
|
var targetsStr, text string
|
|
|
|
if err := parseMessageParams(msg, &targetsStr, &text); err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
for _, name := range strings.Split(targetsStr, ",") {
|
2020-02-19 17:25:19 +00:00
|
|
|
uc, upstreamName, err := dc.unmarshalChannel(name)
|
2020-02-17 14:56:18 +00:00
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
2020-03-13 14:12:44 +00:00
|
|
|
if upstreamName == "NickServ" {
|
|
|
|
dc.handleNickServPRIVMSG(uc, text)
|
|
|
|
}
|
|
|
|
|
2020-02-19 17:25:19 +00:00
|
|
|
uc.SendMessage(&irc.Message{
|
2020-02-17 14:56:18 +00:00
|
|
|
Command: "PRIVMSG",
|
2020-02-19 17:25:19 +00:00
|
|
|
Params: []string{upstreamName, text},
|
2020-02-17 15:17:31 +00:00
|
|
|
})
|
2020-03-16 13:28:45 +00:00
|
|
|
|
|
|
|
dc.lock.Lock()
|
|
|
|
dc.ourMessages[msg] = struct{}{}
|
|
|
|
dc.lock.Unlock()
|
|
|
|
|
|
|
|
uc.ring.Produce(msg)
|
2020-02-17 14:56:18 +00:00
|
|
|
}
|
2020-02-06 15:18:19 +00:00
|
|
|
default:
|
2020-02-17 11:36:42 +00:00
|
|
|
dc.logger.Printf("unhandled message: %v", msg)
|
2020-02-06 15:18:19 +00:00
|
|
|
return newUnknownCommandError(msg.Command)
|
|
|
|
}
|
2020-02-07 11:19:42 +00:00
|
|
|
return nil
|
2020-02-06 15:18:19 +00:00
|
|
|
}
|
2020-03-13 14:12:44 +00:00
|
|
|
|
|
|
|
func (dc *downstreamConn) handleNickServPRIVMSG(uc *upstreamConn, text string) {
|
|
|
|
username, password, ok := parseNickServCredentials(text, uc.nick)
|
|
|
|
if !ok {
|
|
|
|
return
|
|
|
|
}
|
|
|
|
|
|
|
|
dc.logger.Printf("auto-saving NickServ credentials with username %q", username)
|
|
|
|
n := uc.network
|
|
|
|
n.SASL.Mechanism = "PLAIN"
|
|
|
|
n.SASL.Plain.Username = username
|
|
|
|
n.SASL.Plain.Password = password
|
|
|
|
if err := dc.srv.db.StoreNetwork(dc.user.Username, &n.Network); err != nil {
|
|
|
|
dc.logger.Printf("failed to save NickServ credentials: %v", err)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func parseNickServCredentials(text, nick string) (username, password string, ok bool) {
|
|
|
|
fields := strings.Fields(text)
|
|
|
|
if len(fields) < 2 {
|
|
|
|
return "", "", false
|
|
|
|
}
|
|
|
|
cmd := strings.ToUpper(fields[0])
|
|
|
|
params := fields[1:]
|
|
|
|
switch cmd {
|
|
|
|
case "REGISTER":
|
|
|
|
username = nick
|
|
|
|
password = params[0]
|
|
|
|
case "IDENTIFY":
|
|
|
|
if len(params) == 1 {
|
|
|
|
username = nick
|
|
|
|
} else {
|
|
|
|
username = params[0]
|
|
|
|
}
|
|
|
|
password = params[1]
|
|
|
|
}
|
|
|
|
return username, password, true
|
|
|
|
}
|