| 1 | package soju
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| 2 |
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| 3 | import (
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| 4 | "crypto/tls"
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| 5 | "encoding/base64"
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| 6 | "errors"
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| 7 | "fmt"
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| 8 | "io"
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| 9 | "net"
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| 10 | "strconv"
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| 11 | "strings"
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| 12 | "time"
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| 13 |
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| 14 | "github.com/emersion/go-sasl"
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| 15 | "gopkg.in/irc.v3"
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| 16 | )
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| 17 |
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| 18 | type upstreamChannel struct {
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| 19 | Name string
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| 20 | conn *upstreamConn
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| 21 | Topic string
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| 22 | TopicWho string
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| 23 | TopicTime time.Time
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| 24 | Status channelStatus
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| 25 | modes channelModes
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| 26 | creationTime string
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| 27 | Members map[string]*membership
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| 28 | complete bool
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| 29 | }
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| 30 |
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| 31 | type upstreamConn struct {
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| 32 | conn
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| 33 |
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| 34 | network *network
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| 35 | user *user
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| 36 |
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| 37 | serverName string
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| 38 | availableUserModes string
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| 39 | availableChannelModes map[byte]channelModeType
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| 40 | availableChannelTypes string
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| 41 | availableMemberships []membership
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| 42 |
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| 43 | registered bool
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| 44 | nick string
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| 45 | username string
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| 46 | realname string
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| 47 | modes userModes
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| 48 | channels map[string]*upstreamChannel
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| 49 | caps map[string]string
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| 50 | batches map[string]batch
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| 51 | away bool
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| 52 |
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| 53 | tagsSupported bool
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| 54 | labelsSupported bool
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| 55 | nextLabelID uint64
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| 56 |
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| 57 | saslClient sasl.Client
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| 58 | saslStarted bool
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| 59 |
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| 60 | // set of LIST commands in progress, per downstream
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| 61 | pendingLISTDownstreamSet map[uint64]struct{}
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| 62 |
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| 63 | messageLoggers map[string]*messageLogger
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| 64 | }
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| 65 |
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| 66 | func connectToUpstream(network *network) (*upstreamConn, error) {
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| 67 | logger := &prefixLogger{network.user.srv.Logger, fmt.Sprintf("upstream %q: ", network.Addr)}
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| 68 |
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| 69 | var scheme string
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| 70 | var addr string
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| 71 |
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| 72 | addrParts := strings.SplitN(network.Addr, "://", 2)
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| 73 | if len(addrParts) == 2 {
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| 74 | scheme = addrParts[0]
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| 75 | addr = addrParts[1]
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| 76 | } else {
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| 77 | scheme = "ircs"
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| 78 | addr = addrParts[0]
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| 79 | }
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| 80 |
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| 81 | dialer := net.Dialer{Timeout: connectTimeout}
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| 82 |
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| 83 | var netConn net.Conn
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| 84 | var err error
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| 85 | switch scheme {
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| 86 | case "ircs":
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| 87 | if !strings.ContainsRune(addr, ':') {
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| 88 | addr = addr + ":6697"
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| 89 | }
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| 90 |
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| 91 | logger.Printf("connecting to TLS server at address %q", addr)
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| 92 | netConn, err = tls.DialWithDialer(&dialer, "tcp", addr, nil)
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| 93 | case "irc+insecure":
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| 94 | if !strings.ContainsRune(addr, ':') {
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| 95 | addr = addr + ":6667"
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| 96 | }
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| 97 |
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| 98 | logger.Printf("connecting to plain-text server at address %q", addr)
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| 99 | netConn, err = dialer.Dial("tcp", addr)
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| 100 | default:
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| 101 | return nil, fmt.Errorf("failed to dial %q: unknown scheme: %v", addr, scheme)
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| 102 | }
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| 103 | if err != nil {
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| 104 | return nil, fmt.Errorf("failed to dial %q: %v", addr, err)
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| 105 | }
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| 106 |
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| 107 | uc := &upstreamConn{
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| 108 | conn: *newConn(network.user.srv, netConn, logger),
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| 109 | network: network,
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| 110 | user: network.user,
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| 111 | channels: make(map[string]*upstreamChannel),
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| 112 | caps: make(map[string]string),
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| 113 | batches: make(map[string]batch),
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| 114 | availableChannelTypes: stdChannelTypes,
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| 115 | availableChannelModes: stdChannelModes,
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| 116 | availableMemberships: stdMemberships,
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| 117 | pendingLISTDownstreamSet: make(map[uint64]struct{}),
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| 118 | messageLoggers: make(map[string]*messageLogger),
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| 119 | }
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| 120 |
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| 121 | return uc, nil
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| 122 | }
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| 123 |
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| 124 | func (uc *upstreamConn) forEachDownstream(f func(*downstreamConn)) {
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| 125 | uc.network.forEachDownstream(f)
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| 126 | }
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| 127 |
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| 128 | func (uc *upstreamConn) forEachDownstreamByID(id uint64, f func(*downstreamConn)) {
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| 129 | uc.forEachDownstream(func(dc *downstreamConn) {
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| 130 | if id != 0 && id != dc.id {
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| 131 | return
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| 132 | }
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| 133 | f(dc)
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| 134 | })
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| 135 | }
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| 136 |
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| 137 | func (uc *upstreamConn) getChannel(name string) (*upstreamChannel, error) {
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| 138 | ch, ok := uc.channels[name]
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| 139 | if !ok {
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| 140 | return nil, fmt.Errorf("unknown channel %q", name)
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| 141 | }
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| 142 | return ch, nil
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| 143 | }
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| 144 |
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| 145 | func (uc *upstreamConn) isChannel(entity string) bool {
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| 146 | if i := strings.IndexByte(uc.availableChannelTypes, entity[0]); i >= 0 {
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| 147 | return true
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| 148 | }
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| 149 | return false
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| 150 | }
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| 151 |
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| 152 | func (uc *upstreamConn) getPendingLIST() *pendingLIST {
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| 153 | for _, pl := range uc.user.pendingLISTs {
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| 154 | if _, ok := pl.pendingCommands[uc.network.ID]; !ok {
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| 155 | continue
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| 156 | }
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| 157 | return &pl
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| 158 | }
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| 159 | return nil
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| 160 | }
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| 161 |
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| 162 | func (uc *upstreamConn) endPendingLISTs(all bool) (found bool) {
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| 163 | found = false
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| 164 | for i := 0; i < len(uc.user.pendingLISTs); i++ {
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| 165 | pl := uc.user.pendingLISTs[i]
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| 166 | if _, ok := pl.pendingCommands[uc.network.ID]; !ok {
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| 167 | continue
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| 168 | }
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| 169 | delete(pl.pendingCommands, uc.network.ID)
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| 170 | if len(pl.pendingCommands) == 0 {
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| 171 | uc.user.pendingLISTs = append(uc.user.pendingLISTs[:i], uc.user.pendingLISTs[i+1:]...)
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| 172 | i--
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| 173 | uc.forEachDownstreamByID(pl.downstreamID, func(dc *downstreamConn) {
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| 174 | dc.SendMessage(&irc.Message{
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| 175 | Prefix: dc.srv.prefix(),
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| 176 | Command: irc.RPL_LISTEND,
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| 177 | Params: []string{dc.nick, "End of /LIST"},
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| 178 | })
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| 179 | })
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| 180 | }
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| 181 | found = true
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| 182 | if !all {
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| 183 | delete(uc.pendingLISTDownstreamSet, pl.downstreamID)
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| 184 | uc.user.forEachUpstream(func(uc *upstreamConn) {
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| 185 | uc.trySendLIST(pl.downstreamID)
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| 186 | })
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| 187 | return
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| 188 | }
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| 189 | }
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| 190 | return
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| 191 | }
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| 192 |
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| 193 | func (uc *upstreamConn) trySendLIST(downstreamID uint64) {
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| 194 | if _, ok := uc.pendingLISTDownstreamSet[downstreamID]; ok {
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| 195 | // a LIST command is already pending
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| 196 | // we will try again when that command is completed
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| 197 | return
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| 198 | }
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| 199 |
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| 200 | for _, pl := range uc.user.pendingLISTs {
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| 201 | if pl.downstreamID != downstreamID {
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| 202 | continue
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| 203 | }
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| 204 | // this is the first pending LIST command list of the downstream
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| 205 | listCommand, ok := pl.pendingCommands[uc.network.ID]
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| 206 | if !ok {
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| 207 | // there is no command for this upstream in these LIST commands
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| 208 | // do not send anything
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| 209 | continue
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| 210 | }
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| 211 | // there is a command for this upstream in these LIST commands
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| 212 | // send it now
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| 213 |
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| 214 | uc.SendMessageLabeled(downstreamID, listCommand)
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| 215 |
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| 216 | uc.pendingLISTDownstreamSet[downstreamID] = struct{}{}
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| 217 | return
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| 218 | }
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| 219 | }
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| 220 |
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| 221 | func (uc *upstreamConn) parseMembershipPrefix(s string) (membership *membership, nick string) {
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| 222 | for _, m := range uc.availableMemberships {
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| 223 | if m.Prefix == s[0] {
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| 224 | return &m, s[1:]
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| 225 | }
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| 226 | }
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| 227 | return nil, s
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| 228 | }
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| 229 |
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| 230 | func (uc *upstreamConn) handleMessage(msg *irc.Message) error {
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| 231 | var label string
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| 232 | if l, ok := msg.GetTag("label"); ok {
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| 233 | label = l
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| 234 | }
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| 235 |
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| 236 | var msgBatch *batch
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| 237 | if batchName, ok := msg.GetTag("batch"); ok {
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| 238 | b, ok := uc.batches[batchName]
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| 239 | if !ok {
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| 240 | return fmt.Errorf("unexpected batch reference: batch was not defined: %q", batchName)
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| 241 | }
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| 242 | msgBatch = &b
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| 243 | if label == "" {
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| 244 | label = msgBatch.Label
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| 245 | }
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| 246 | }
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| 247 |
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| 248 | var downstreamID uint64 = 0
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| 249 | if label != "" {
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| 250 | var labelOffset uint64
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| 251 | n, err := fmt.Sscanf(label, "sd-%d-%d", &downstreamID, &labelOffset)
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| 252 | if err == nil && n < 2 {
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| 253 | err = errors.New("not enough arguments")
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| 254 | }
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| 255 | if err != nil {
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| 256 | return fmt.Errorf("unexpected message label: invalid downstream reference for label %q: %v", label, err)
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| 257 | }
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| 258 | }
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| 259 |
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| 260 | if _, ok := msg.Tags["time"]; !ok {
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| 261 | msg.Tags["time"] = irc.TagValue(time.Now().UTC().Format(serverTimeLayout))
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| 262 | }
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| 263 |
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| 264 | switch msg.Command {
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| 265 | case "PING":
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| 266 | uc.SendMessage(&irc.Message{
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| 267 | Command: "PONG",
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| 268 | Params: msg.Params,
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| 269 | })
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| 270 | return nil
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| 271 | case "NOTICE":
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| 272 | if msg.Prefix.User == "" && msg.Prefix.Host == "" { // server message
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| 273 | uc.produce("", msg, nil)
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| 274 | } else { // regular user NOTICE
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| 275 | var entity, text string
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| 276 | if err := parseMessageParams(msg, &entity, &text); err != nil {
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| 277 | return err
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| 278 | }
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| 279 |
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| 280 | target := entity
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| 281 | if target == uc.nick {
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| 282 | target = msg.Prefix.Name
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| 283 | }
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| 284 | uc.produce(target, msg, nil)
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| 285 | }
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| 286 | case "CAP":
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| 287 | var subCmd string
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| 288 | if err := parseMessageParams(msg, nil, &subCmd); err != nil {
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| 289 | return err
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| 290 | }
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| 291 | subCmd = strings.ToUpper(subCmd)
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| 292 | subParams := msg.Params[2:]
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| 293 | switch subCmd {
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| 294 | case "LS":
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| 295 | if len(subParams) < 1 {
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| 296 | return newNeedMoreParamsError(msg.Command)
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| 297 | }
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| 298 | caps := strings.Fields(subParams[len(subParams)-1])
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| 299 | more := len(subParams) >= 2 && msg.Params[len(subParams)-2] == "*"
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| 300 |
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| 301 | for _, s := range caps {
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| 302 | kv := strings.SplitN(s, "=", 2)
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| 303 | k := strings.ToLower(kv[0])
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| 304 | var v string
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| 305 | if len(kv) == 2 {
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| 306 | v = kv[1]
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| 307 | }
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| 308 | uc.caps[k] = v
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| 309 | }
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| 310 |
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| 311 | if more {
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| 312 | break // wait to receive all capabilities
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| 313 | }
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| 314 |
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| 315 | requestCaps := make([]string, 0, 16)
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| 316 | for _, c := range []string{"message-tags", "batch", "labeled-response", "server-time"} {
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| 317 | if _, ok := uc.caps[c]; ok {
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| 318 | requestCaps = append(requestCaps, c)
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| 319 | }
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| 320 | }
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| 321 |
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| 322 | if uc.requestSASL() {
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| 323 | requestCaps = append(requestCaps, "sasl")
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| 324 | }
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| 325 |
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| 326 | if len(requestCaps) > 0 {
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| 327 | uc.SendMessage(&irc.Message{
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| 328 | Command: "CAP",
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| 329 | Params: []string{"REQ", strings.Join(requestCaps, " ")},
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| 330 | })
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| 331 | }
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| 332 |
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| 333 | if uc.requestSASL() {
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| 334 | break // we'll send CAP END after authentication is completed
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| 335 | }
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| 336 |
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| 337 | uc.SendMessage(&irc.Message{
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| 338 | Command: "CAP",
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| 339 | Params: []string{"END"},
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| 340 | })
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| 341 | case "ACK", "NAK":
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| 342 | if len(subParams) < 1 {
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| 343 | return newNeedMoreParamsError(msg.Command)
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| 344 | }
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| 345 | caps := strings.Fields(subParams[0])
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| 346 |
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| 347 | for _, name := range caps {
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| 348 | if err := uc.handleCapAck(strings.ToLower(name), subCmd == "ACK"); err != nil {
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| 349 | return err
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| 350 | }
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| 351 | }
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| 352 |
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| 353 | if uc.saslClient == nil {
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| 354 | uc.SendMessage(&irc.Message{
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| 355 | Command: "CAP",
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| 356 | Params: []string{"END"},
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| 357 | })
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| 358 | }
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| 359 | default:
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| 360 | uc.logger.Printf("unhandled message: %v", msg)
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| 361 | }
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| 362 | case "AUTHENTICATE":
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| 363 | if uc.saslClient == nil {
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| 364 | return fmt.Errorf("received unexpected AUTHENTICATE message")
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| 365 | }
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| 366 |
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| 367 | // TODO: if a challenge is 400 bytes long, buffer it
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| 368 | var challengeStr string
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| 369 | if err := parseMessageParams(msg, &challengeStr); err != nil {
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| 370 | uc.SendMessage(&irc.Message{
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| 371 | Command: "AUTHENTICATE",
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| 372 | Params: []string{"*"},
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| 373 | })
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| 374 | return err
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| 375 | }
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| 376 |
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| 377 | var challenge []byte
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| 378 | if challengeStr != "+" {
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| 379 | var err error
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| 380 | challenge, err = base64.StdEncoding.DecodeString(challengeStr)
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| 381 | if err != nil {
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| 382 | uc.SendMessage(&irc.Message{
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| 383 | Command: "AUTHENTICATE",
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| 384 | Params: []string{"*"},
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| 385 | })
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| 386 | return err
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| 387 | }
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| 388 | }
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| 389 |
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| 390 | var resp []byte
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| 391 | var err error
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| 392 | if !uc.saslStarted {
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| 393 | _, resp, err = uc.saslClient.Start()
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| 394 | uc.saslStarted = true
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| 395 | } else {
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| 396 | resp, err = uc.saslClient.Next(challenge)
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| 397 | }
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| 398 | if err != nil {
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| 399 | uc.SendMessage(&irc.Message{
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| 400 | Command: "AUTHENTICATE",
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| 401 | Params: []string{"*"},
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| 402 | })
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| 403 | return err
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| 404 | }
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| 405 |
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| 406 | // TODO: send response in multiple chunks if >= 400 bytes
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| 407 | var respStr = "+"
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| 408 | if resp != nil {
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| 409 | respStr = base64.StdEncoding.EncodeToString(resp)
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| 410 | }
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| 411 |
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| 412 | uc.SendMessage(&irc.Message{
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| 413 | Command: "AUTHENTICATE",
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| 414 | Params: []string{respStr},
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| 415 | })
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| 416 | case irc.RPL_LOGGEDIN:
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| 417 | var account string
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| 418 | if err := parseMessageParams(msg, nil, nil, &account); err != nil {
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| 419 | return err
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| 420 | }
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| 421 | uc.logger.Printf("logged in with account %q", account)
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| 422 | case irc.RPL_LOGGEDOUT:
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| 423 | uc.logger.Printf("logged out")
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| 424 | case irc.ERR_NICKLOCKED, irc.RPL_SASLSUCCESS, irc.ERR_SASLFAIL, irc.ERR_SASLTOOLONG, irc.ERR_SASLABORTED:
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| 425 | var info string
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| 426 | if err := parseMessageParams(msg, nil, &info); err != nil {
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| 427 | return err
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| 428 | }
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| 429 | switch msg.Command {
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| 430 | case irc.ERR_NICKLOCKED:
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| 431 | uc.logger.Printf("invalid nick used with SASL authentication: %v", info)
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| 432 | case irc.ERR_SASLFAIL:
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| 433 | uc.logger.Printf("SASL authentication failed: %v", info)
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|---|
| 434 | case irc.ERR_SASLTOOLONG:
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| 435 | uc.logger.Printf("SASL message too long: %v", info)
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|---|
| 436 | }
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| 437 |
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| 438 | uc.saslClient = nil
|
|---|
| 439 | uc.saslStarted = false
|
|---|
| 440 |
|
|---|
| 441 | uc.SendMessage(&irc.Message{
|
|---|
| 442 | Command: "CAP",
|
|---|
| 443 | Params: []string{"END"},
|
|---|
| 444 | })
|
|---|
| 445 | case irc.RPL_WELCOME:
|
|---|
| 446 | uc.registered = true
|
|---|
| 447 | uc.logger.Printf("connection registered")
|
|---|
| 448 |
|
|---|
| 449 | for _, ch := range uc.network.channels {
|
|---|
| 450 | params := []string{ch.Name}
|
|---|
| 451 | if ch.Key != "" {
|
|---|
| 452 | params = append(params, ch.Key)
|
|---|
| 453 | }
|
|---|
| 454 | uc.SendMessage(&irc.Message{
|
|---|
| 455 | Command: "JOIN",
|
|---|
| 456 | Params: params,
|
|---|
| 457 | })
|
|---|
| 458 | }
|
|---|
| 459 | case irc.RPL_MYINFO:
|
|---|
| 460 | if err := parseMessageParams(msg, nil, &uc.serverName, nil, &uc.availableUserModes, nil); err != nil {
|
|---|
| 461 | return err
|
|---|
| 462 | }
|
|---|
| 463 | case irc.RPL_ISUPPORT:
|
|---|
| 464 | if err := parseMessageParams(msg, nil, nil); err != nil {
|
|---|
| 465 | return err
|
|---|
| 466 | }
|
|---|
| 467 | for _, token := range msg.Params[1 : len(msg.Params)-1] {
|
|---|
| 468 | negate := false
|
|---|
| 469 | parameter := token
|
|---|
| 470 | value := ""
|
|---|
| 471 | if strings.HasPrefix(token, "-") {
|
|---|
| 472 | negate = true
|
|---|
| 473 | token = token[1:]
|
|---|
| 474 | } else {
|
|---|
| 475 | if i := strings.IndexByte(token, '='); i >= 0 {
|
|---|
| 476 | parameter = token[:i]
|
|---|
| 477 | value = token[i+1:]
|
|---|
| 478 | }
|
|---|
| 479 | }
|
|---|
| 480 | if !negate {
|
|---|
| 481 | switch parameter {
|
|---|
| 482 | case "CHANMODES":
|
|---|
| 483 | parts := strings.SplitN(value, ",", 5)
|
|---|
| 484 | if len(parts) < 4 {
|
|---|
| 485 | return fmt.Errorf("malformed ISUPPORT CHANMODES value: %v", value)
|
|---|
| 486 | }
|
|---|
| 487 | modes := make(map[byte]channelModeType)
|
|---|
| 488 | for i, mt := range []channelModeType{modeTypeA, modeTypeB, modeTypeC, modeTypeD} {
|
|---|
| 489 | for j := 0; j < len(parts[i]); j++ {
|
|---|
| 490 | mode := parts[i][j]
|
|---|
| 491 | modes[mode] = mt
|
|---|
| 492 | }
|
|---|
| 493 | }
|
|---|
| 494 | uc.availableChannelModes = modes
|
|---|
| 495 | case "CHANTYPES":
|
|---|
| 496 | uc.availableChannelTypes = value
|
|---|
| 497 | case "PREFIX":
|
|---|
| 498 | if value == "" {
|
|---|
| 499 | uc.availableMemberships = nil
|
|---|
| 500 | } else {
|
|---|
| 501 | if value[0] != '(' {
|
|---|
| 502 | return fmt.Errorf("malformed ISUPPORT PREFIX value: %v", value)
|
|---|
| 503 | }
|
|---|
| 504 | sep := strings.IndexByte(value, ')')
|
|---|
| 505 | if sep < 0 || len(value) != sep*2 {
|
|---|
| 506 | return fmt.Errorf("malformed ISUPPORT PREFIX value: %v", value)
|
|---|
| 507 | }
|
|---|
| 508 | memberships := make([]membership, len(value)/2-1)
|
|---|
| 509 | for i := range memberships {
|
|---|
| 510 | memberships[i] = membership{
|
|---|
| 511 | Mode: value[i+1],
|
|---|
| 512 | Prefix: value[sep+i+1],
|
|---|
| 513 | }
|
|---|
| 514 | }
|
|---|
| 515 | uc.availableMemberships = memberships
|
|---|
| 516 | }
|
|---|
| 517 | }
|
|---|
| 518 | } else {
|
|---|
| 519 | // TODO: handle ISUPPORT negations
|
|---|
| 520 | }
|
|---|
| 521 | }
|
|---|
| 522 | case "BATCH":
|
|---|
| 523 | var tag string
|
|---|
| 524 | if err := parseMessageParams(msg, &tag); err != nil {
|
|---|
| 525 | return err
|
|---|
| 526 | }
|
|---|
| 527 |
|
|---|
| 528 | if strings.HasPrefix(tag, "+") {
|
|---|
| 529 | tag = tag[1:]
|
|---|
| 530 | if _, ok := uc.batches[tag]; ok {
|
|---|
| 531 | return fmt.Errorf("unexpected BATCH reference tag: batch was already defined: %q", tag)
|
|---|
| 532 | }
|
|---|
| 533 | var batchType string
|
|---|
| 534 | if err := parseMessageParams(msg, nil, &batchType); err != nil {
|
|---|
| 535 | return err
|
|---|
| 536 | }
|
|---|
| 537 | label := label
|
|---|
| 538 | if label == "" && msgBatch != nil {
|
|---|
| 539 | label = msgBatch.Label
|
|---|
| 540 | }
|
|---|
| 541 | uc.batches[tag] = batch{
|
|---|
| 542 | Type: batchType,
|
|---|
| 543 | Params: msg.Params[2:],
|
|---|
| 544 | Outer: msgBatch,
|
|---|
| 545 | Label: label,
|
|---|
| 546 | }
|
|---|
| 547 | } else if strings.HasPrefix(tag, "-") {
|
|---|
| 548 | tag = tag[1:]
|
|---|
| 549 | if _, ok := uc.batches[tag]; !ok {
|
|---|
| 550 | return fmt.Errorf("unknown BATCH reference tag: %q", tag)
|
|---|
| 551 | }
|
|---|
| 552 | delete(uc.batches, tag)
|
|---|
| 553 | } else {
|
|---|
| 554 | return fmt.Errorf("unexpected BATCH reference tag: missing +/- prefix: %q", tag)
|
|---|
| 555 | }
|
|---|
| 556 | case "NICK":
|
|---|
| 557 | if msg.Prefix == nil {
|
|---|
| 558 | return fmt.Errorf("expected a prefix")
|
|---|
| 559 | }
|
|---|
| 560 |
|
|---|
| 561 | var newNick string
|
|---|
| 562 | if err := parseMessageParams(msg, &newNick); err != nil {
|
|---|
| 563 | return err
|
|---|
| 564 | }
|
|---|
| 565 |
|
|---|
| 566 | me := false
|
|---|
| 567 | if msg.Prefix.Name == uc.nick {
|
|---|
| 568 | uc.logger.Printf("changed nick from %q to %q", uc.nick, newNick)
|
|---|
| 569 | me = true
|
|---|
| 570 | uc.nick = newNick
|
|---|
| 571 | }
|
|---|
| 572 |
|
|---|
| 573 | for _, ch := range uc.channels {
|
|---|
| 574 | if membership, ok := ch.Members[msg.Prefix.Name]; ok {
|
|---|
| 575 | delete(ch.Members, msg.Prefix.Name)
|
|---|
| 576 | ch.Members[newNick] = membership
|
|---|
| 577 | uc.appendLog(ch.Name, msg)
|
|---|
| 578 | uc.appendHistory(ch.Name, msg)
|
|---|
| 579 | }
|
|---|
| 580 | }
|
|---|
| 581 |
|
|---|
| 582 | if !me {
|
|---|
| 583 | uc.forEachDownstream(func(dc *downstreamConn) {
|
|---|
| 584 | dc.SendMessage(dc.marshalMessage(msg, uc.network))
|
|---|
| 585 | })
|
|---|
| 586 | }
|
|---|
| 587 | case "JOIN":
|
|---|
| 588 | if msg.Prefix == nil {
|
|---|
| 589 | return fmt.Errorf("expected a prefix")
|
|---|
| 590 | }
|
|---|
| 591 |
|
|---|
| 592 | var channels string
|
|---|
| 593 | if err := parseMessageParams(msg, &channels); err != nil {
|
|---|
| 594 | return err
|
|---|
| 595 | }
|
|---|
| 596 |
|
|---|
| 597 | for _, ch := range strings.Split(channels, ",") {
|
|---|
| 598 | if msg.Prefix.Name == uc.nick {
|
|---|
| 599 | uc.logger.Printf("joined channel %q", ch)
|
|---|
| 600 | uc.channels[ch] = &upstreamChannel{
|
|---|
| 601 | Name: ch,
|
|---|
| 602 | conn: uc,
|
|---|
| 603 | Members: make(map[string]*membership),
|
|---|
| 604 | }
|
|---|
| 605 |
|
|---|
| 606 | uc.SendMessage(&irc.Message{
|
|---|
| 607 | Command: "MODE",
|
|---|
| 608 | Params: []string{ch},
|
|---|
| 609 | })
|
|---|
| 610 | } else {
|
|---|
| 611 | ch, err := uc.getChannel(ch)
|
|---|
| 612 | if err != nil {
|
|---|
| 613 | return err
|
|---|
| 614 | }
|
|---|
| 615 | ch.Members[msg.Prefix.Name] = nil
|
|---|
| 616 | }
|
|---|
| 617 |
|
|---|
| 618 | chMsg := msg.Copy()
|
|---|
| 619 | chMsg.Params[0] = ch
|
|---|
| 620 | uc.produce(ch, chMsg, nil)
|
|---|
| 621 | }
|
|---|
| 622 | case "PART":
|
|---|
| 623 | if msg.Prefix == nil {
|
|---|
| 624 | return fmt.Errorf("expected a prefix")
|
|---|
| 625 | }
|
|---|
| 626 |
|
|---|
| 627 | var channels string
|
|---|
| 628 | if err := parseMessageParams(msg, &channels); err != nil {
|
|---|
| 629 | return err
|
|---|
| 630 | }
|
|---|
| 631 |
|
|---|
| 632 | for _, ch := range strings.Split(channels, ",") {
|
|---|
| 633 | if msg.Prefix.Name == uc.nick {
|
|---|
| 634 | uc.logger.Printf("parted channel %q", ch)
|
|---|
| 635 | delete(uc.channels, ch)
|
|---|
| 636 | } else {
|
|---|
| 637 | ch, err := uc.getChannel(ch)
|
|---|
| 638 | if err != nil {
|
|---|
| 639 | return err
|
|---|
| 640 | }
|
|---|
| 641 | delete(ch.Members, msg.Prefix.Name)
|
|---|
| 642 | }
|
|---|
| 643 |
|
|---|
| 644 | chMsg := msg.Copy()
|
|---|
| 645 | chMsg.Params[0] = ch
|
|---|
| 646 | uc.produce(ch, chMsg, nil)
|
|---|
| 647 | }
|
|---|
| 648 | case "KICK":
|
|---|
| 649 | if msg.Prefix == nil {
|
|---|
| 650 | return fmt.Errorf("expected a prefix")
|
|---|
| 651 | }
|
|---|
| 652 |
|
|---|
| 653 | var channel, user string
|
|---|
| 654 | if err := parseMessageParams(msg, &channel, &user); err != nil {
|
|---|
| 655 | return err
|
|---|
| 656 | }
|
|---|
| 657 |
|
|---|
| 658 | if user == uc.nick {
|
|---|
| 659 | uc.logger.Printf("kicked from channel %q by %s", channel, msg.Prefix.Name)
|
|---|
| 660 | delete(uc.channels, channel)
|
|---|
| 661 | } else {
|
|---|
| 662 | ch, err := uc.getChannel(channel)
|
|---|
| 663 | if err != nil {
|
|---|
| 664 | return err
|
|---|
| 665 | }
|
|---|
| 666 | delete(ch.Members, user)
|
|---|
| 667 | }
|
|---|
| 668 |
|
|---|
| 669 | uc.produce(channel, msg, nil)
|
|---|
| 670 | case "QUIT":
|
|---|
| 671 | if msg.Prefix == nil {
|
|---|
| 672 | return fmt.Errorf("expected a prefix")
|
|---|
| 673 | }
|
|---|
| 674 |
|
|---|
| 675 | if msg.Prefix.Name == uc.nick {
|
|---|
| 676 | uc.logger.Printf("quit")
|
|---|
| 677 | }
|
|---|
| 678 |
|
|---|
| 679 | for _, ch := range uc.channels {
|
|---|
| 680 | if _, ok := ch.Members[msg.Prefix.Name]; ok {
|
|---|
| 681 | delete(ch.Members, msg.Prefix.Name)
|
|---|
| 682 |
|
|---|
| 683 | uc.appendLog(ch.Name, msg)
|
|---|
| 684 | uc.appendHistory(ch.Name, msg)
|
|---|
| 685 | }
|
|---|
| 686 | }
|
|---|
| 687 |
|
|---|
| 688 | if msg.Prefix.Name != uc.nick {
|
|---|
| 689 | uc.forEachDownstream(func(dc *downstreamConn) {
|
|---|
| 690 | dc.SendMessage(dc.marshalMessage(msg, uc.network))
|
|---|
| 691 | })
|
|---|
| 692 | }
|
|---|
| 693 | case irc.RPL_TOPIC, irc.RPL_NOTOPIC:
|
|---|
| 694 | var name, topic string
|
|---|
| 695 | if err := parseMessageParams(msg, nil, &name, &topic); err != nil {
|
|---|
| 696 | return err
|
|---|
| 697 | }
|
|---|
| 698 | ch, err := uc.getChannel(name)
|
|---|
| 699 | if err != nil {
|
|---|
| 700 | return err
|
|---|
| 701 | }
|
|---|
| 702 | if msg.Command == irc.RPL_TOPIC {
|
|---|
| 703 | ch.Topic = topic
|
|---|
| 704 | } else {
|
|---|
| 705 | ch.Topic = ""
|
|---|
| 706 | }
|
|---|
| 707 | case "TOPIC":
|
|---|
| 708 | var name string
|
|---|
| 709 | if err := parseMessageParams(msg, &name); err != nil {
|
|---|
| 710 | return err
|
|---|
| 711 | }
|
|---|
| 712 | ch, err := uc.getChannel(name)
|
|---|
| 713 | if err != nil {
|
|---|
| 714 | return err
|
|---|
| 715 | }
|
|---|
| 716 | if len(msg.Params) > 1 {
|
|---|
| 717 | ch.Topic = msg.Params[1]
|
|---|
| 718 | } else {
|
|---|
| 719 | ch.Topic = ""
|
|---|
| 720 | }
|
|---|
| 721 | uc.produce(ch.Name, msg, nil)
|
|---|
| 722 | case "MODE":
|
|---|
| 723 | var name, modeStr string
|
|---|
| 724 | if err := parseMessageParams(msg, &name, &modeStr); err != nil {
|
|---|
| 725 | return err
|
|---|
| 726 | }
|
|---|
| 727 |
|
|---|
| 728 | if !uc.isChannel(name) { // user mode change
|
|---|
| 729 | if name != uc.nick {
|
|---|
| 730 | return fmt.Errorf("received MODE message for unknown nick %q", name)
|
|---|
| 731 | }
|
|---|
| 732 | return uc.modes.Apply(modeStr)
|
|---|
| 733 | // TODO: notify downstreams about user mode change?
|
|---|
| 734 | } else { // channel mode change
|
|---|
| 735 | ch, err := uc.getChannel(name)
|
|---|
| 736 | if err != nil {
|
|---|
| 737 | return err
|
|---|
| 738 | }
|
|---|
| 739 |
|
|---|
| 740 | if ch.modes != nil {
|
|---|
| 741 | if err := ch.modes.Apply(uc.availableChannelModes, modeStr, msg.Params[2:]...); err != nil {
|
|---|
| 742 | return err
|
|---|
| 743 | }
|
|---|
| 744 | }
|
|---|
| 745 |
|
|---|
| 746 | uc.produce(ch.Name, msg, nil)
|
|---|
| 747 | }
|
|---|
| 748 | case irc.RPL_UMODEIS:
|
|---|
| 749 | if err := parseMessageParams(msg, nil); err != nil {
|
|---|
| 750 | return err
|
|---|
| 751 | }
|
|---|
| 752 | modeStr := ""
|
|---|
| 753 | if len(msg.Params) > 1 {
|
|---|
| 754 | modeStr = msg.Params[1]
|
|---|
| 755 | }
|
|---|
| 756 |
|
|---|
| 757 | uc.modes = ""
|
|---|
| 758 | if err := uc.modes.Apply(modeStr); err != nil {
|
|---|
| 759 | return err
|
|---|
| 760 | }
|
|---|
| 761 | // TODO: send RPL_UMODEIS to downstream connections when applicable
|
|---|
| 762 | case irc.RPL_CHANNELMODEIS:
|
|---|
| 763 | var channel string
|
|---|
| 764 | if err := parseMessageParams(msg, nil, &channel); err != nil {
|
|---|
| 765 | return err
|
|---|
| 766 | }
|
|---|
| 767 | modeStr := ""
|
|---|
| 768 | if len(msg.Params) > 2 {
|
|---|
| 769 | modeStr = msg.Params[2]
|
|---|
| 770 | }
|
|---|
| 771 |
|
|---|
| 772 | ch, err := uc.getChannel(channel)
|
|---|
| 773 | if err != nil {
|
|---|
| 774 | return err
|
|---|
| 775 | }
|
|---|
| 776 |
|
|---|
| 777 | firstMode := ch.modes == nil
|
|---|
| 778 | ch.modes = make(map[byte]string)
|
|---|
| 779 | if err := ch.modes.Apply(uc.availableChannelModes, modeStr, msg.Params[3:]...); err != nil {
|
|---|
| 780 | return err
|
|---|
| 781 | }
|
|---|
| 782 | if firstMode {
|
|---|
| 783 | modeStr, modeParams := ch.modes.Format()
|
|---|
| 784 |
|
|---|
| 785 | uc.forEachDownstream(func(dc *downstreamConn) {
|
|---|
| 786 | params := []string{dc.nick, dc.marshalEntity(uc.network, channel), modeStr}
|
|---|
| 787 | params = append(params, modeParams...)
|
|---|
| 788 |
|
|---|
| 789 | dc.SendMessage(&irc.Message{
|
|---|
| 790 | Prefix: dc.srv.prefix(),
|
|---|
| 791 | Command: irc.RPL_CHANNELMODEIS,
|
|---|
| 792 | Params: params,
|
|---|
| 793 | })
|
|---|
| 794 | })
|
|---|
| 795 | }
|
|---|
| 796 | case rpl_creationtime:
|
|---|
| 797 | var channel, creationTime string
|
|---|
| 798 | if err := parseMessageParams(msg, nil, &channel, &creationTime); err != nil {
|
|---|
| 799 | return err
|
|---|
| 800 | }
|
|---|
| 801 |
|
|---|
| 802 | ch, err := uc.getChannel(channel)
|
|---|
| 803 | if err != nil {
|
|---|
| 804 | return err
|
|---|
| 805 | }
|
|---|
| 806 |
|
|---|
| 807 | firstCreationTime := ch.creationTime == ""
|
|---|
| 808 | ch.creationTime = creationTime
|
|---|
| 809 | if firstCreationTime {
|
|---|
| 810 | uc.forEachDownstream(func(dc *downstreamConn) {
|
|---|
| 811 | dc.SendMessage(&irc.Message{
|
|---|
| 812 | Prefix: dc.srv.prefix(),
|
|---|
| 813 | Command: rpl_creationtime,
|
|---|
| 814 | Params: []string{dc.nick, channel, creationTime},
|
|---|
| 815 | })
|
|---|
| 816 | })
|
|---|
| 817 | }
|
|---|
| 818 | case rpl_topicwhotime:
|
|---|
| 819 | var name, who, timeStr string
|
|---|
| 820 | if err := parseMessageParams(msg, nil, &name, &who, &timeStr); err != nil {
|
|---|
| 821 | return err
|
|---|
| 822 | }
|
|---|
| 823 | ch, err := uc.getChannel(name)
|
|---|
| 824 | if err != nil {
|
|---|
| 825 | return err
|
|---|
| 826 | }
|
|---|
| 827 | ch.TopicWho = who
|
|---|
| 828 | sec, err := strconv.ParseInt(timeStr, 10, 64)
|
|---|
| 829 | if err != nil {
|
|---|
| 830 | return fmt.Errorf("failed to parse topic time: %v", err)
|
|---|
| 831 | }
|
|---|
| 832 | ch.TopicTime = time.Unix(sec, 0)
|
|---|
| 833 | case irc.RPL_LIST:
|
|---|
| 834 | var channel, clients, topic string
|
|---|
| 835 | if err := parseMessageParams(msg, nil, &channel, &clients, &topic); err != nil {
|
|---|
| 836 | return err
|
|---|
| 837 | }
|
|---|
| 838 |
|
|---|
| 839 | pl := uc.getPendingLIST()
|
|---|
| 840 | if pl == nil {
|
|---|
| 841 | return fmt.Errorf("unexpected RPL_LIST: no matching pending LIST")
|
|---|
| 842 | }
|
|---|
| 843 |
|
|---|
| 844 | uc.forEachDownstreamByID(pl.downstreamID, func(dc *downstreamConn) {
|
|---|
| 845 | dc.SendMessage(&irc.Message{
|
|---|
| 846 | Prefix: dc.srv.prefix(),
|
|---|
| 847 | Command: irc.RPL_LIST,
|
|---|
| 848 | Params: []string{dc.nick, dc.marshalEntity(uc.network, channel), clients, topic},
|
|---|
| 849 | })
|
|---|
| 850 | })
|
|---|
| 851 | case irc.RPL_LISTEND:
|
|---|
| 852 | ok := uc.endPendingLISTs(false)
|
|---|
| 853 | if !ok {
|
|---|
| 854 | return fmt.Errorf("unexpected RPL_LISTEND: no matching pending LIST")
|
|---|
| 855 | }
|
|---|
| 856 | case irc.RPL_NAMREPLY:
|
|---|
| 857 | var name, statusStr, members string
|
|---|
| 858 | if err := parseMessageParams(msg, nil, &statusStr, &name, &members); err != nil {
|
|---|
| 859 | return err
|
|---|
| 860 | }
|
|---|
| 861 |
|
|---|
| 862 | ch, ok := uc.channels[name]
|
|---|
| 863 | if !ok {
|
|---|
| 864 | // NAMES on a channel we have not joined, forward to downstream
|
|---|
| 865 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 866 | channel := dc.marshalEntity(uc.network, name)
|
|---|
| 867 | members := splitSpace(members)
|
|---|
| 868 | for i, member := range members {
|
|---|
| 869 | membership, nick := uc.parseMembershipPrefix(member)
|
|---|
| 870 | members[i] = membership.String() + dc.marshalEntity(uc.network, nick)
|
|---|
| 871 | }
|
|---|
| 872 | memberStr := strings.Join(members, " ")
|
|---|
| 873 |
|
|---|
| 874 | dc.SendMessage(&irc.Message{
|
|---|
| 875 | Prefix: dc.srv.prefix(),
|
|---|
| 876 | Command: irc.RPL_NAMREPLY,
|
|---|
| 877 | Params: []string{dc.nick, statusStr, channel, memberStr},
|
|---|
| 878 | })
|
|---|
| 879 | })
|
|---|
| 880 | return nil
|
|---|
| 881 | }
|
|---|
| 882 |
|
|---|
| 883 | status, err := parseChannelStatus(statusStr)
|
|---|
| 884 | if err != nil {
|
|---|
| 885 | return err
|
|---|
| 886 | }
|
|---|
| 887 | ch.Status = status
|
|---|
| 888 |
|
|---|
| 889 | for _, s := range splitSpace(members) {
|
|---|
| 890 | membership, nick := uc.parseMembershipPrefix(s)
|
|---|
| 891 | ch.Members[nick] = membership
|
|---|
| 892 | }
|
|---|
| 893 | case irc.RPL_ENDOFNAMES:
|
|---|
| 894 | var name string
|
|---|
| 895 | if err := parseMessageParams(msg, nil, &name); err != nil {
|
|---|
| 896 | return err
|
|---|
| 897 | }
|
|---|
| 898 |
|
|---|
| 899 | ch, ok := uc.channels[name]
|
|---|
| 900 | if !ok {
|
|---|
| 901 | // NAMES on a channel we have not joined, forward to downstream
|
|---|
| 902 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 903 | channel := dc.marshalEntity(uc.network, name)
|
|---|
| 904 |
|
|---|
| 905 | dc.SendMessage(&irc.Message{
|
|---|
| 906 | Prefix: dc.srv.prefix(),
|
|---|
| 907 | Command: irc.RPL_ENDOFNAMES,
|
|---|
| 908 | Params: []string{dc.nick, channel, "End of /NAMES list"},
|
|---|
| 909 | })
|
|---|
| 910 | })
|
|---|
| 911 | return nil
|
|---|
| 912 | }
|
|---|
| 913 |
|
|---|
| 914 | if ch.complete {
|
|---|
| 915 | return fmt.Errorf("received unexpected RPL_ENDOFNAMES")
|
|---|
| 916 | }
|
|---|
| 917 | ch.complete = true
|
|---|
| 918 |
|
|---|
| 919 | uc.forEachDownstream(func(dc *downstreamConn) {
|
|---|
| 920 | forwardChannel(dc, ch)
|
|---|
| 921 | })
|
|---|
| 922 | case irc.RPL_WHOREPLY:
|
|---|
| 923 | var channel, username, host, server, nick, mode, trailing string
|
|---|
| 924 | if err := parseMessageParams(msg, nil, &channel, &username, &host, &server, &nick, &mode, &trailing); err != nil {
|
|---|
| 925 | return err
|
|---|
| 926 | }
|
|---|
| 927 |
|
|---|
| 928 | parts := strings.SplitN(trailing, " ", 2)
|
|---|
| 929 | if len(parts) != 2 {
|
|---|
| 930 | return fmt.Errorf("received malformed RPL_WHOREPLY: wrong trailing parameter: %s", trailing)
|
|---|
| 931 | }
|
|---|
| 932 | realname := parts[1]
|
|---|
| 933 | hops, err := strconv.Atoi(parts[0])
|
|---|
| 934 | if err != nil {
|
|---|
| 935 | return fmt.Errorf("received malformed RPL_WHOREPLY: wrong hop count: %s", parts[0])
|
|---|
| 936 | }
|
|---|
| 937 | hops++
|
|---|
| 938 |
|
|---|
| 939 | trailing = strconv.Itoa(hops) + " " + realname
|
|---|
| 940 |
|
|---|
| 941 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 942 | channel := channel
|
|---|
| 943 | if channel != "*" {
|
|---|
| 944 | channel = dc.marshalEntity(uc.network, channel)
|
|---|
| 945 | }
|
|---|
| 946 | nick := dc.marshalEntity(uc.network, nick)
|
|---|
| 947 | dc.SendMessage(&irc.Message{
|
|---|
| 948 | Prefix: dc.srv.prefix(),
|
|---|
| 949 | Command: irc.RPL_WHOREPLY,
|
|---|
| 950 | Params: []string{dc.nick, channel, username, host, server, nick, mode, trailing},
|
|---|
| 951 | })
|
|---|
| 952 | })
|
|---|
| 953 | case irc.RPL_ENDOFWHO:
|
|---|
| 954 | var name string
|
|---|
| 955 | if err := parseMessageParams(msg, nil, &name); err != nil {
|
|---|
| 956 | return err
|
|---|
| 957 | }
|
|---|
| 958 |
|
|---|
| 959 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 960 | name := name
|
|---|
| 961 | if name != "*" {
|
|---|
| 962 | // TODO: support WHO masks
|
|---|
| 963 | name = dc.marshalEntity(uc.network, name)
|
|---|
| 964 | }
|
|---|
| 965 | dc.SendMessage(&irc.Message{
|
|---|
| 966 | Prefix: dc.srv.prefix(),
|
|---|
| 967 | Command: irc.RPL_ENDOFWHO,
|
|---|
| 968 | Params: []string{dc.nick, name, "End of /WHO list"},
|
|---|
| 969 | })
|
|---|
| 970 | })
|
|---|
| 971 | case irc.RPL_WHOISUSER:
|
|---|
| 972 | var nick, username, host, realname string
|
|---|
| 973 | if err := parseMessageParams(msg, nil, &nick, &username, &host, nil, &realname); err != nil {
|
|---|
| 974 | return err
|
|---|
| 975 | }
|
|---|
| 976 |
|
|---|
| 977 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 978 | nick := dc.marshalEntity(uc.network, nick)
|
|---|
| 979 | dc.SendMessage(&irc.Message{
|
|---|
| 980 | Prefix: dc.srv.prefix(),
|
|---|
| 981 | Command: irc.RPL_WHOISUSER,
|
|---|
| 982 | Params: []string{dc.nick, nick, username, host, "*", realname},
|
|---|
| 983 | })
|
|---|
| 984 | })
|
|---|
| 985 | case irc.RPL_WHOISSERVER:
|
|---|
| 986 | var nick, server, serverInfo string
|
|---|
| 987 | if err := parseMessageParams(msg, nil, &nick, &server, &serverInfo); err != nil {
|
|---|
| 988 | return err
|
|---|
| 989 | }
|
|---|
| 990 |
|
|---|
| 991 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 992 | nick := dc.marshalEntity(uc.network, nick)
|
|---|
| 993 | dc.SendMessage(&irc.Message{
|
|---|
| 994 | Prefix: dc.srv.prefix(),
|
|---|
| 995 | Command: irc.RPL_WHOISSERVER,
|
|---|
| 996 | Params: []string{dc.nick, nick, server, serverInfo},
|
|---|
| 997 | })
|
|---|
| 998 | })
|
|---|
| 999 | case irc.RPL_WHOISOPERATOR:
|
|---|
| 1000 | var nick string
|
|---|
| 1001 | if err := parseMessageParams(msg, nil, &nick); err != nil {
|
|---|
| 1002 | return err
|
|---|
| 1003 | }
|
|---|
| 1004 |
|
|---|
| 1005 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 1006 | nick := dc.marshalEntity(uc.network, nick)
|
|---|
| 1007 | dc.SendMessage(&irc.Message{
|
|---|
| 1008 | Prefix: dc.srv.prefix(),
|
|---|
| 1009 | Command: irc.RPL_WHOISOPERATOR,
|
|---|
| 1010 | Params: []string{dc.nick, nick, "is an IRC operator"},
|
|---|
| 1011 | })
|
|---|
| 1012 | })
|
|---|
| 1013 | case irc.RPL_WHOISIDLE:
|
|---|
| 1014 | var nick string
|
|---|
| 1015 | if err := parseMessageParams(msg, nil, &nick, nil); err != nil {
|
|---|
| 1016 | return err
|
|---|
| 1017 | }
|
|---|
| 1018 |
|
|---|
| 1019 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 1020 | nick := dc.marshalEntity(uc.network, nick)
|
|---|
| 1021 | params := []string{dc.nick, nick}
|
|---|
| 1022 | params = append(params, msg.Params[2:]...)
|
|---|
| 1023 | dc.SendMessage(&irc.Message{
|
|---|
| 1024 | Prefix: dc.srv.prefix(),
|
|---|
| 1025 | Command: irc.RPL_WHOISIDLE,
|
|---|
| 1026 | Params: params,
|
|---|
| 1027 | })
|
|---|
| 1028 | })
|
|---|
| 1029 | case irc.RPL_WHOISCHANNELS:
|
|---|
| 1030 | var nick, channelList string
|
|---|
| 1031 | if err := parseMessageParams(msg, nil, &nick, &channelList); err != nil {
|
|---|
| 1032 | return err
|
|---|
| 1033 | }
|
|---|
| 1034 | channels := splitSpace(channelList)
|
|---|
| 1035 |
|
|---|
| 1036 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 1037 | nick := dc.marshalEntity(uc.network, nick)
|
|---|
| 1038 | channelList := make([]string, len(channels))
|
|---|
| 1039 | for i, channel := range channels {
|
|---|
| 1040 | prefix, channel := uc.parseMembershipPrefix(channel)
|
|---|
| 1041 | channel = dc.marshalEntity(uc.network, channel)
|
|---|
| 1042 | channelList[i] = prefix.String() + channel
|
|---|
| 1043 | }
|
|---|
| 1044 | channels := strings.Join(channelList, " ")
|
|---|
| 1045 | dc.SendMessage(&irc.Message{
|
|---|
| 1046 | Prefix: dc.srv.prefix(),
|
|---|
| 1047 | Command: irc.RPL_WHOISCHANNELS,
|
|---|
| 1048 | Params: []string{dc.nick, nick, channels},
|
|---|
| 1049 | })
|
|---|
| 1050 | })
|
|---|
| 1051 | case irc.RPL_ENDOFWHOIS:
|
|---|
| 1052 | var nick string
|
|---|
| 1053 | if err := parseMessageParams(msg, nil, &nick); err != nil {
|
|---|
| 1054 | return err
|
|---|
| 1055 | }
|
|---|
| 1056 |
|
|---|
| 1057 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 1058 | nick := dc.marshalEntity(uc.network, nick)
|
|---|
| 1059 | dc.SendMessage(&irc.Message{
|
|---|
| 1060 | Prefix: dc.srv.prefix(),
|
|---|
| 1061 | Command: irc.RPL_ENDOFWHOIS,
|
|---|
| 1062 | Params: []string{dc.nick, nick, "End of /WHOIS list"},
|
|---|
| 1063 | })
|
|---|
| 1064 | })
|
|---|
| 1065 | case "PRIVMSG":
|
|---|
| 1066 | if msg.Prefix == nil {
|
|---|
| 1067 | return fmt.Errorf("expected a prefix")
|
|---|
| 1068 | }
|
|---|
| 1069 |
|
|---|
| 1070 | var entity, text string
|
|---|
| 1071 | if err := parseMessageParams(msg, &entity, &text); err != nil {
|
|---|
| 1072 | return err
|
|---|
| 1073 | }
|
|---|
| 1074 |
|
|---|
| 1075 | if msg.Prefix.Name == serviceNick {
|
|---|
| 1076 | uc.logger.Printf("skipping PRIVMSG from soju's service: %v", msg)
|
|---|
| 1077 | break
|
|---|
| 1078 | }
|
|---|
| 1079 | if entity == serviceNick {
|
|---|
| 1080 | uc.logger.Printf("skipping PRIVMSG to soju's service: %v", msg)
|
|---|
| 1081 | break
|
|---|
| 1082 | }
|
|---|
| 1083 |
|
|---|
| 1084 | target := entity
|
|---|
| 1085 | if target == uc.nick {
|
|---|
| 1086 | target = msg.Prefix.Name
|
|---|
| 1087 | }
|
|---|
| 1088 | uc.produce(target, msg, nil)
|
|---|
| 1089 | case "INVITE":
|
|---|
| 1090 | var nick string
|
|---|
| 1091 | var channel string
|
|---|
| 1092 | if err := parseMessageParams(msg, &nick, &channel); err != nil {
|
|---|
| 1093 | return err
|
|---|
| 1094 | }
|
|---|
| 1095 |
|
|---|
| 1096 | uc.forEachDownstream(func(dc *downstreamConn) {
|
|---|
| 1097 | dc.SendMessage(&irc.Message{
|
|---|
| 1098 | Prefix: dc.marshalUserPrefix(uc.network, msg.Prefix),
|
|---|
| 1099 | Command: "INVITE",
|
|---|
| 1100 | Params: []string{dc.marshalEntity(uc.network, nick), dc.marshalEntity(uc.network, channel)},
|
|---|
| 1101 | })
|
|---|
| 1102 | })
|
|---|
| 1103 | case irc.RPL_INVITING:
|
|---|
| 1104 | var nick string
|
|---|
| 1105 | var channel string
|
|---|
| 1106 | if err := parseMessageParams(msg, &nick, &channel); err != nil {
|
|---|
| 1107 | return err
|
|---|
| 1108 | }
|
|---|
| 1109 |
|
|---|
| 1110 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 1111 | dc.SendMessage(&irc.Message{
|
|---|
| 1112 | Prefix: dc.srv.prefix(),
|
|---|
| 1113 | Command: irc.RPL_INVITING,
|
|---|
| 1114 | Params: []string{dc.nick, dc.marshalEntity(uc.network, nick), dc.marshalEntity(uc.network, channel)},
|
|---|
| 1115 | })
|
|---|
| 1116 | })
|
|---|
| 1117 | case irc.ERR_UNKNOWNCOMMAND, irc.RPL_TRYAGAIN:
|
|---|
| 1118 | var command, reason string
|
|---|
| 1119 | if err := parseMessageParams(msg, nil, &command, &reason); err != nil {
|
|---|
| 1120 | return err
|
|---|
| 1121 | }
|
|---|
| 1122 |
|
|---|
| 1123 | if command == "LIST" {
|
|---|
| 1124 | ok := uc.endPendingLISTs(false)
|
|---|
| 1125 | if !ok {
|
|---|
| 1126 | return fmt.Errorf("unexpected response for LIST: %q: no matching pending LIST", msg.Command)
|
|---|
| 1127 | }
|
|---|
| 1128 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 1129 | dc.SendMessage(&irc.Message{
|
|---|
| 1130 | Prefix: uc.srv.prefix(),
|
|---|
| 1131 | Command: msg.Command,
|
|---|
| 1132 | Params: []string{dc.nick, "LIST", reason},
|
|---|
| 1133 | })
|
|---|
| 1134 | })
|
|---|
| 1135 | }
|
|---|
| 1136 | case irc.RPL_AWAY:
|
|---|
| 1137 | var nick, reason string
|
|---|
| 1138 | if err := parseMessageParams(msg, nil, &nick, &reason); err != nil {
|
|---|
| 1139 | return err
|
|---|
| 1140 | }
|
|---|
| 1141 |
|
|---|
| 1142 | uc.forEachDownstreamByID(downstreamID, func(dc *downstreamConn) {
|
|---|
| 1143 | dc.SendMessage(&irc.Message{
|
|---|
| 1144 | Prefix: dc.srv.prefix(),
|
|---|
| 1145 | Command: irc.RPL_AWAY,
|
|---|
| 1146 | Params: []string{dc.nick, dc.marshalEntity(uc.network, nick), reason},
|
|---|
| 1147 | })
|
|---|
| 1148 | })
|
|---|
| 1149 | case "TAGMSG":
|
|---|
| 1150 | // TODO: relay to downstream connections that accept message-tags
|
|---|
| 1151 | case "ACK":
|
|---|
| 1152 | // Ignore
|
|---|
| 1153 | case irc.RPL_NOWAWAY, irc.RPL_UNAWAY:
|
|---|
| 1154 | // Ignore
|
|---|
| 1155 | case irc.RPL_YOURHOST, irc.RPL_CREATED:
|
|---|
| 1156 | // Ignore
|
|---|
| 1157 | case irc.RPL_LUSERCLIENT, irc.RPL_LUSEROP, irc.RPL_LUSERUNKNOWN, irc.RPL_LUSERCHANNELS, irc.RPL_LUSERME:
|
|---|
| 1158 | // Ignore
|
|---|
| 1159 | case irc.RPL_MOTDSTART, irc.RPL_MOTD, irc.RPL_ENDOFMOTD:
|
|---|
| 1160 | // Ignore
|
|---|
| 1161 | case irc.RPL_LISTSTART:
|
|---|
| 1162 | // Ignore
|
|---|
| 1163 | case rpl_localusers, rpl_globalusers:
|
|---|
| 1164 | // Ignore
|
|---|
| 1165 | case irc.RPL_STATSVLINE, rpl_statsping, irc.RPL_STATSBLINE, irc.RPL_STATSDLINE:
|
|---|
| 1166 | // Ignore
|
|---|
| 1167 | default:
|
|---|
| 1168 | uc.logger.Printf("unhandled message: %v", msg)
|
|---|
| 1169 | }
|
|---|
| 1170 | return nil
|
|---|
| 1171 | }
|
|---|
| 1172 |
|
|---|
| 1173 | func splitSpace(s string) []string {
|
|---|
| 1174 | return strings.FieldsFunc(s, func(r rune) bool {
|
|---|
| 1175 | return r == ' '
|
|---|
| 1176 | })
|
|---|
| 1177 | }
|
|---|
| 1178 |
|
|---|
| 1179 | func (uc *upstreamConn) register() {
|
|---|
| 1180 | uc.nick = uc.network.Nick
|
|---|
| 1181 | uc.username = uc.network.Username
|
|---|
| 1182 | if uc.username == "" {
|
|---|
| 1183 | uc.username = uc.nick
|
|---|
| 1184 | }
|
|---|
| 1185 | uc.realname = uc.network.Realname
|
|---|
| 1186 | if uc.realname == "" {
|
|---|
| 1187 | uc.realname = uc.nick
|
|---|
| 1188 | }
|
|---|
| 1189 |
|
|---|
| 1190 | uc.SendMessage(&irc.Message{
|
|---|
| 1191 | Command: "CAP",
|
|---|
| 1192 | Params: []string{"LS", "302"},
|
|---|
| 1193 | })
|
|---|
| 1194 |
|
|---|
| 1195 | if uc.network.Pass != "" {
|
|---|
| 1196 | uc.SendMessage(&irc.Message{
|
|---|
| 1197 | Command: "PASS",
|
|---|
| 1198 | Params: []string{uc.network.Pass},
|
|---|
| 1199 | })
|
|---|
| 1200 | }
|
|---|
| 1201 |
|
|---|
| 1202 | uc.SendMessage(&irc.Message{
|
|---|
| 1203 | Command: "NICK",
|
|---|
| 1204 | Params: []string{uc.nick},
|
|---|
| 1205 | })
|
|---|
| 1206 | uc.SendMessage(&irc.Message{
|
|---|
| 1207 | Command: "USER",
|
|---|
| 1208 | Params: []string{uc.username, "0", "*", uc.realname},
|
|---|
| 1209 | })
|
|---|
| 1210 | }
|
|---|
| 1211 |
|
|---|
| 1212 | func (uc *upstreamConn) runUntilRegistered() error {
|
|---|
| 1213 | for !uc.registered {
|
|---|
| 1214 | msg, err := uc.ReadMessage()
|
|---|
| 1215 | if err != nil {
|
|---|
| 1216 | return fmt.Errorf("failed to read message: %v", err)
|
|---|
| 1217 | }
|
|---|
| 1218 |
|
|---|
| 1219 | if err := uc.handleMessage(msg); err != nil {
|
|---|
| 1220 | return fmt.Errorf("failed to handle message %q: %v", msg, err)
|
|---|
| 1221 | }
|
|---|
| 1222 | }
|
|---|
| 1223 |
|
|---|
| 1224 | for _, command := range uc.network.ConnectCommands {
|
|---|
| 1225 | m, err := irc.ParseMessage(command)
|
|---|
| 1226 | if err != nil {
|
|---|
| 1227 | uc.logger.Printf("failed to parse connect command %q: %v", command, err)
|
|---|
| 1228 | } else {
|
|---|
| 1229 | uc.SendMessage(m)
|
|---|
| 1230 | }
|
|---|
| 1231 | }
|
|---|
| 1232 |
|
|---|
| 1233 | return nil
|
|---|
| 1234 | }
|
|---|
| 1235 |
|
|---|
| 1236 | func (uc *upstreamConn) requestSASL() bool {
|
|---|
| 1237 | if uc.network.SASL.Mechanism == "" {
|
|---|
| 1238 | return false
|
|---|
| 1239 | }
|
|---|
| 1240 |
|
|---|
| 1241 | v, ok := uc.caps["sasl"]
|
|---|
| 1242 | if !ok {
|
|---|
| 1243 | return false
|
|---|
| 1244 | }
|
|---|
| 1245 | if v != "" {
|
|---|
| 1246 | mechanisms := strings.Split(v, ",")
|
|---|
| 1247 | found := false
|
|---|
| 1248 | for _, mech := range mechanisms {
|
|---|
| 1249 | if strings.EqualFold(mech, uc.network.SASL.Mechanism) {
|
|---|
| 1250 | found = true
|
|---|
| 1251 | break
|
|---|
| 1252 | }
|
|---|
| 1253 | }
|
|---|
| 1254 | if !found {
|
|---|
| 1255 | return false
|
|---|
| 1256 | }
|
|---|
| 1257 | }
|
|---|
| 1258 |
|
|---|
| 1259 | return true
|
|---|
| 1260 | }
|
|---|
| 1261 |
|
|---|
| 1262 | func (uc *upstreamConn) handleCapAck(name string, ok bool) error {
|
|---|
| 1263 | auth := &uc.network.SASL
|
|---|
| 1264 | switch name {
|
|---|
| 1265 | case "sasl":
|
|---|
| 1266 | if !ok {
|
|---|
| 1267 | uc.logger.Printf("server refused to acknowledge the SASL capability")
|
|---|
| 1268 | return nil
|
|---|
| 1269 | }
|
|---|
| 1270 |
|
|---|
| 1271 | switch auth.Mechanism {
|
|---|
| 1272 | case "PLAIN":
|
|---|
| 1273 | uc.logger.Printf("starting SASL PLAIN authentication with username %q", auth.Plain.Username)
|
|---|
| 1274 | uc.saslClient = sasl.NewPlainClient("", auth.Plain.Username, auth.Plain.Password)
|
|---|
| 1275 | default:
|
|---|
| 1276 | return fmt.Errorf("unsupported SASL mechanism %q", name)
|
|---|
| 1277 | }
|
|---|
| 1278 |
|
|---|
| 1279 | uc.SendMessage(&irc.Message{
|
|---|
| 1280 | Command: "AUTHENTICATE",
|
|---|
| 1281 | Params: []string{auth.Mechanism},
|
|---|
| 1282 | })
|
|---|
| 1283 | case "message-tags":
|
|---|
| 1284 | uc.tagsSupported = ok
|
|---|
| 1285 | case "labeled-response":
|
|---|
| 1286 | uc.labelsSupported = ok
|
|---|
| 1287 | case "batch", "server-time":
|
|---|
| 1288 | // Nothing to do
|
|---|
| 1289 | default:
|
|---|
| 1290 | uc.logger.Printf("received CAP ACK/NAK for a cap we don't support: %v", name)
|
|---|
| 1291 | }
|
|---|
| 1292 | return nil
|
|---|
| 1293 | }
|
|---|
| 1294 |
|
|---|
| 1295 | func (uc *upstreamConn) readMessages(ch chan<- event) error {
|
|---|
| 1296 | for {
|
|---|
| 1297 | msg, err := uc.ReadMessage()
|
|---|
| 1298 | if err == io.EOF {
|
|---|
| 1299 | break
|
|---|
| 1300 | } else if err != nil {
|
|---|
| 1301 | return fmt.Errorf("failed to read IRC command: %v", err)
|
|---|
| 1302 | }
|
|---|
| 1303 |
|
|---|
| 1304 | ch <- eventUpstreamMessage{msg, uc}
|
|---|
| 1305 | }
|
|---|
| 1306 |
|
|---|
| 1307 | return nil
|
|---|
| 1308 | }
|
|---|
| 1309 |
|
|---|
| 1310 | func (uc *upstreamConn) SendMessageLabeled(downstreamID uint64, msg *irc.Message) {
|
|---|
| 1311 | if uc.labelsSupported {
|
|---|
| 1312 | if msg.Tags == nil {
|
|---|
| 1313 | msg.Tags = make(map[string]irc.TagValue)
|
|---|
| 1314 | }
|
|---|
| 1315 | msg.Tags["label"] = irc.TagValue(fmt.Sprintf("sd-%d-%d", downstreamID, uc.nextLabelID))
|
|---|
| 1316 | uc.nextLabelID++
|
|---|
| 1317 | }
|
|---|
| 1318 | uc.SendMessage(msg)
|
|---|
| 1319 | }
|
|---|
| 1320 |
|
|---|
| 1321 | // TODO: handle moving logs when a network name changes, when support for this is added
|
|---|
| 1322 | func (uc *upstreamConn) appendLog(entity string, msg *irc.Message) {
|
|---|
| 1323 | if uc.srv.LogPath == "" {
|
|---|
| 1324 | return
|
|---|
| 1325 | }
|
|---|
| 1326 |
|
|---|
| 1327 | ml, ok := uc.messageLoggers[entity]
|
|---|
| 1328 | if !ok {
|
|---|
| 1329 | ml = newMessageLogger(uc.network, entity)
|
|---|
| 1330 | uc.messageLoggers[entity] = ml
|
|---|
| 1331 | }
|
|---|
| 1332 |
|
|---|
| 1333 | if err := ml.Append(msg); err != nil {
|
|---|
| 1334 | uc.logger.Printf("failed to log message: %v", err)
|
|---|
| 1335 | }
|
|---|
| 1336 | }
|
|---|
| 1337 |
|
|---|
| 1338 | // appendHistory appends a message to the history. entity can be empty.
|
|---|
| 1339 | func (uc *upstreamConn) appendHistory(entity string, msg *irc.Message) {
|
|---|
| 1340 | // If no client is offline, no need to append the message to the buffer
|
|---|
| 1341 | if len(uc.network.offlineClients) == 0 {
|
|---|
| 1342 | return
|
|---|
| 1343 | }
|
|---|
| 1344 |
|
|---|
| 1345 | history, ok := uc.network.history[entity]
|
|---|
| 1346 | if !ok {
|
|---|
| 1347 | history = &networkHistory{
|
|---|
| 1348 | offlineClients: make(map[string]uint64),
|
|---|
| 1349 | ring: NewRing(uc.srv.RingCap),
|
|---|
| 1350 | }
|
|---|
| 1351 | uc.network.history[entity] = history
|
|---|
| 1352 |
|
|---|
| 1353 | for clientName, _ := range uc.network.offlineClients {
|
|---|
| 1354 | history.offlineClients[clientName] = 0
|
|---|
| 1355 | }
|
|---|
| 1356 | }
|
|---|
| 1357 |
|
|---|
| 1358 | history.ring.Produce(msg)
|
|---|
| 1359 | }
|
|---|
| 1360 |
|
|---|
| 1361 | // produce appends a message to the logs, adds it to the history and forwards
|
|---|
| 1362 | // it to connected downstream connections.
|
|---|
| 1363 | //
|
|---|
| 1364 | // If origin is not nil and origin doesn't support echo-message, the message is
|
|---|
| 1365 | // forwarded to all connections except origin.
|
|---|
| 1366 | func (uc *upstreamConn) produce(target string, msg *irc.Message, origin *downstreamConn) {
|
|---|
| 1367 | if target != "" {
|
|---|
| 1368 | uc.appendLog(target, msg)
|
|---|
| 1369 | }
|
|---|
| 1370 |
|
|---|
| 1371 | uc.appendHistory(target, msg)
|
|---|
| 1372 |
|
|---|
| 1373 | uc.forEachDownstream(func(dc *downstreamConn) {
|
|---|
| 1374 | if dc != origin || dc.caps["echo-message"] {
|
|---|
| 1375 | dc.SendMessage(dc.marshalMessage(msg, uc.network))
|
|---|
| 1376 | }
|
|---|
| 1377 | })
|
|---|
| 1378 | }
|
|---|
| 1379 |
|
|---|
| 1380 | func (uc *upstreamConn) updateAway() {
|
|---|
| 1381 | away := true
|
|---|
| 1382 | uc.forEachDownstream(func(*downstreamConn) {
|
|---|
| 1383 | away = false
|
|---|
| 1384 | })
|
|---|
| 1385 | if away == uc.away {
|
|---|
| 1386 | return
|
|---|
| 1387 | }
|
|---|
| 1388 | if away {
|
|---|
| 1389 | uc.SendMessage(&irc.Message{
|
|---|
| 1390 | Command: "AWAY",
|
|---|
| 1391 | Params: []string{"Auto away"},
|
|---|
| 1392 | })
|
|---|
| 1393 | } else {
|
|---|
| 1394 | uc.SendMessage(&irc.Message{
|
|---|
| 1395 | Command: "AWAY",
|
|---|
| 1396 | })
|
|---|
| 1397 | }
|
|---|
| 1398 | uc.away = away
|
|---|
| 1399 | }
|
|---|
