diff options
| author |   Jason A. Donenfeld <Jason@zx2c4.com> | 2021-05-27 12:17:12 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-06-03 18:38:26 +0200 |
| commit | b52ec14d2dc335cebcc11193491a0bba16faedf3 (patch) | |
| tree | 21602c3a90eed14c2b05e2bd82d59738400b4d98 | |
| download | irc-go-b52ec14d2dc335cebcc11193491a0bba16faedf3.tar.xz irc-go-b52ec14d2dc335cebcc11193491a0bba16faedf3.zip | |
Initial commit of utilities
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -rw-r--r-- | .gitignore | 4 | ||||
| -rw-r--r-- | LICENSE | 339 | ||||
| -rw-r--r-- | Makefile | 15 | ||||
| -rw-r--r-- | README.md | 30 | ||||
| -rw-r--r-- | cmd/irc-simple-responder/main.go | 126 | ||||
| -rw-r--r-- | cmd/ircmirror/ircwriters.go | 177 | ||||
| -rw-r--r-- | cmd/ircmirror/keycache.go | 61 | ||||
| -rw-r--r-- | cmd/ircmirror/main.go | 158 | ||||
| -rw-r--r-- | cmd/ircmirror/net.go | 84 | ||||
| -rw-r--r-- | cmd/ircmirror/vpnprovider.go | 137 | ||||
| -rw-r--r-- | cmd/wurgurboo/cgit.go | 178 | ||||
| -rw-r--r-- | cmd/wurgurboo/main.go | 101 | ||||
| -rw-r--r-- | go.mod | 11 | ||||
| -rw-r--r-- | go.sum | 619 | ||||
| -rw-r--r-- | hbot/commands.go | 151 | ||||
| -rw-r--r-- | hbot/hbot.go | 314 | ||||
| -rw-r--r-- | hbot/internaltriggers.go | 112 | ||||
| -rw-r--r-- | hbot/irc_caps.go | 154 | ||||
| -rw-r--r-- | hbot/message.go | 420 | ||||
| -rw-r--r-- | hbot/message_test.go | 573 |
20 files changed, 3764 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..dc45649 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +/ircmirror +/irc-simple-responder +*.cache +.idea @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. 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To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) 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It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + <one line to give the program's name and a brief idea of what it does.> + Copyright (C) <year> <name of author> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + <signature of Ty Coon>, 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..07e9be1 --- /dev/null +++ b/Makefile @@ -0,0 +1,15 @@ +targets := $(patsubst cmd/%,%,$(wildcard cmd/*)) +input := $(wildcard hbot/* go.mod go.sum) +all: $(targets) +define gobuild +$(1): $$(wildcard cmd/$(1)/*.go) $$(input) + CGO_ENABLED=0 go build -buildmode=pie -v -o $(1) ./cmd/$(1) +endef +$(foreach target,$(targets),$(eval $(call gobuild,$(target)))) +clean: + rm -f $(targets) +fmt: + go fmt ./... +test: + go test -v ./... +.PHONY: all clean fmt test diff --git a/README.md b/README.md new file mode 100644 index 0000000..2561abc --- /dev/null +++ b/README.md @@ -0,0 +1,30 @@ +# IRC Utilities for Go + +This is a small collection of utilities for interacting with IRC in Go. + +### `hbot` - small bot and message parsing library + +Based on [hellabot](https://github.com/whyrusleeping/hellabot), [kittybot](https://github.com/ugjka/kittybot), and [sorcix-irc](https://github.com/sorcix/irc). + +This is a simple message parser and trigger-based IRC client library. + +```go +import "golang.zx2c4.com/irc/hbot" +``` + +### `ircmirror` - mirrors one channel to another, one-way + +To assist in channel migrations, this mirrors messages from one channel to another, by joining the source channel from several IP addresses via WireGuard. + +```go +go get golang.zx2c4.com/irc/cmd/ircmirror +``` + +### `irc-simple-responder` - responds to all messages + +This is best used with `+z` in a channel. It responds to all messages with a static string. + + +```go +go get golang.zx2c4.com/irc/cmd/irc-simple-responder +``` diff --git a/cmd/irc-simple-responder/main.go b/cmd/irc-simple-responder/main.go new file mode 100644 index 0000000..cd86b9f --- /dev/null +++ b/cmd/irc-simple-responder/main.go @@ -0,0 +1,126 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "bufio" + "flag" + "fmt" + "log" + "net" + "os" + "regexp" + "strings" + "sync" + "time" + + "golang.zx2c4.com/irc/hbot" +) + +func main() { + channelsArg := flag.String("channels", "", "channels to join, separated by commas") + serverArg := flag.String("server", "", "server and port") + nickArg := flag.String("nick", "", "nickname") + passwordArg := flag.String("password-file", "", "optional file with password") + messageArg := flag.String("message", "", "message with which to respond") + flag.Parse() + if matched, _ := regexp.MatchString(`^(#[a-zA-Z0-9_-]+,)*(#[a-zA-Z0-9_-]+)$`, *channelsArg); !matched { + fmt.Fprintln(os.Stderr, "Invalid channels") + flag.Usage() + os.Exit(1) + } + if _, _, err := net.SplitHostPort(*serverArg); err != nil { + fmt.Fprintln(os.Stderr, "Invalid server") + flag.Usage() + os.Exit(1) + } + if matched, _ := regexp.MatchString(`^[a-zA-Z0-9\[\]_-]{1,16}$`, *nickArg); !matched { + fmt.Fprintln(os.Stderr, "Invalid nick") + flag.Usage() + os.Exit(1) + } + password := "" + if len(*passwordArg) > 0 { + f, err := os.Open(*passwordArg) + if err != nil { + fmt.Fprintf(os.Stderr, "Unable to open password file: %v\n", err) + os.Exit(1) + } + password, err = bufio.NewReader(f).ReadString('\n') + f.Close() + if err != nil { + fmt.Fprintf(os.Stderr, "Unable to read password file: %v\n", err) + os.Exit(1) + } + if len(password) > 0 && password[len(password)-1] == '\n' { + password = password[:len(password)-1] + } + } + if len(*messageArg) == 0 { + fmt.Fprintln(os.Stderr, "Missing message") + flag.Usage() + os.Exit(1) + } + + const messengerTimeout = time.Minute * 10 + messengers := make(map[string]time.Time, 1024) + var messengersMu sync.Mutex + go func() { + for range time.Tick(messengerTimeout / 20) { + messengersMu.Lock() + for nick, last := range messengers { + if time.Since(last) >= messengerTimeout { + delete(messengers, nick) + } + } + messengersMu.Unlock() + } + }() + + bot := hbot.NewBot(&hbot.Config{ + Host: *serverArg, + Nick: *nickArg, + User: hbot.CommonBotUserPrefix + *nickArg, + Channels: strings.Split(*channelsArg, ","), + Logger: hbot.Logger{Verbosef: log.Printf, Errorf: log.Printf}, + Password: password, + }) + bot.AddTrigger(hbot.Trigger{ + Condition: func(b *hbot.Bot, m *hbot.Message) bool { + if m.Command != "PRIVMSG" || strings.HasPrefix(m.Prefix.User, hbot.CommonBotUserPrefix) || strings.HasPrefix(m.Prefix.User, "~"+hbot.CommonBotUserPrefix) { + return false + } + nick := strings.ToLower(m.Prefix.Name) + messengersMu.Lock() + defer messengersMu.Unlock() + if last, ok := messengers[nick]; ok && time.Since(last) < messengerTimeout { + return false + } + if len(messengers) > 1024*1024*1024 { + return false + } + messengers[nick] = time.Now() + return true + }, + Action: func(b *hbot.Bot, m *hbot.Message) { + message := *messageArg + target := m.Prefix.Name + if strings.Contains(m.Param(0), "#") { + target = m.Param(0) + if target[0] == '@' || target[0] == '+' { + target = target[1:] + } + message = m.Prefix.Name + ": " + message + } + log.Printf("Responding to %q in %q", m.Prefix.String(), target) + b.Msg(target, message) + }, + }) + for { + bot.Run() + time.Sleep(time.Second * 5) + } +} diff --git a/cmd/ircmirror/ircwriters.go b/cmd/ircmirror/ircwriters.go new file mode 100644 index 0000000..cd3b68b --- /dev/null +++ b/cmd/ircmirror/ircwriters.go @@ -0,0 +1,177 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "bufio" + "container/list" + "log" + "math/rand" + "net" + "os" + "regexp" + "strconv" + "strings" + "sync" + "time" + + "golang.zx2c4.com/irc/hbot" +) + +var words []string + +func init() { + f, err := os.Open("/usr/share/dict/words") + if err != nil { + log.Fatalf("Unable to open dictionary: %v", err) + } + defer f.Close() + scanner := bufio.NewScanner(f) + matcher := regexp.MustCompile(`^[a-zA-Z0-9_-]{3,}$`) + for scanner.Scan() { + word := scanner.Text() + if !matcher.MatchString(word) { + continue + } + words = append(words, word) + } + if len(words) == 0 { + log.Fatalln("Did not find any words in dictionary") + } +} + +func randomNick() string { + return words[rand.Intn(len(words))] + words[rand.Intn(len(words))] + strconv.Itoa(rand.Intn(10000)) +} + +type ircWriter struct { + mu sync.Mutex + bot *hbot.Bot + nick string + mungedNick string + usageElem *list.Element + name string +} + +type ircWriters struct { + mu sync.Mutex + byNick map[string]*ircWriter + byUsage list.List + server string + channel string +} + +func (writers *ircWriters) runWriter(name string, dialer func(network, address string) (net.Conn, error)) { + writer := &ircWriter{name: name} + startNick := randomNick() + logf := func(format string, args ...interface{}) { + log.Printf("[DST %s] "+format, append([]interface{}{name}, args...)...) + } + writer.bot = hbot.NewBot(&hbot.Config{ + Host: writers.server, + Nick: startNick, + User: hbot.CommonBotUserPrefix + startNick, + Channels: []string{writers.channel}, + Dial: dialer, + Logger: hbot.Logger{Verbosef: logf, Errorf: logf}, + }) + go func() { + <-writer.bot.Joined() + writers.mu.Lock() + defer writers.mu.Unlock() + writer.mu.Lock() + defer writer.mu.Unlock() + writer.usageElem = writers.byUsage.PushBack(writer) + }() + writer.bot.AddTrigger(hbot.Trigger{ + Condition: func(bot *hbot.Bot, m *hbot.Message) bool { + return (m.Command == "436" || m.Command == "433") && len(writer.nick) > 0 + }, + Action: func(bot *hbot.Bot, m *hbot.Message) { + logf("Failed with nick %q, trying %q\n", writer.mungedNick, writer.mungedNick+"_") + writer.mungedNick += "_" + if len(writer.mungedNick) > 16 { + usidx := strings.IndexByte(writer.mungedNick, '_') + uslen := len(writer.mungedNick[usidx:]) + if uslen >= 16 { + writer.mungedNick = writer.nick + "-" + if len(writer.mungedNick) > 16 { + writer.mungedNick = writer.nick[:15] + "-" + } + } else { + writer.mungedNick = writer.mungedNick[:16-uslen] + writer.mungedNick[usidx:] + } + } + bot.SetNick(writer.mungedNick) + }, + }) + writer.bot.Run() + writers.mu.Lock() + writer.mu.Lock() + if writer.usageElem != nil { + writers.byUsage.Remove(writer.usageElem) + delete(writers.byNick, writer.nick) + } + writer.mu.Unlock() + writers.mu.Unlock() +} + +func (writers *ircWriters) getWriter(nick string) *ircWriter { + writers.mu.Lock() + if writer, ok := writers.byNick[nick]; ok { + writer.mu.Lock() + if writer.nick == nick { + writers.byUsage.MoveToFront(writer.usageElem) + writers.mu.Unlock() + if writer.bot.Nick() != writer.mungedNick { + log.Printf("[DST %s] Changing nick to %q\n", writer.name, nick) + writer.bot.SetNick(writer.mungedNick) + } + return writer + } + writer.mu.Unlock() + } + if writers.byUsage.Len() == 0 { + writers.mu.Unlock() + return nil + } + writer := writers.byUsage.Back().Value.(*ircWriter) + writer.mu.Lock() + delete(writers.byNick, writer.nick) + writer.nick = nick + writer.mungedNick = nick + "-" + if len(writer.mungedNick) > 16 { + writer.mungedNick = nick[:15] + "-" + } + writers.byNick[nick] = writer + writers.byUsage.MoveToFront(writer.usageElem) + writers.mu.Unlock() + log.Printf("[DST %s] Changing nick to %q\n", writer.name, nick) + writer.bot.SetNick(writer.mungedNick) + return writer +} + +func (writers *ircWriters) queueMessage(from, message string) { + writer := writers.getWriter(from) + if writer == nil { + time.AfterFunc(time.Second*3, func() { + writers.queueMessage(from, message) + }) + return + } + log.Printf("[DST %s] Queueing message from %q\n", writer.name, from) + writer.bot.Msg(writers.channel, message) + writer.mu.Unlock() +} + +func newIrcWriterGroup(server, channel string) *ircWriters { + return &ircWriters{ + mu: sync.Mutex{}, + byNick: make(map[string]*ircWriter, 400), + server: server, + channel: channel, + } +} diff --git a/cmd/ircmirror/keycache.go b/cmd/ircmirror/keycache.go new file mode 100644 index 0000000..18027d1 --- /dev/null +++ b/cmd/ircmirror/keycache.go @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "crypto/rand" + "encoding/base64" + "errors" + "log" + "os" + "strings" +) + +const privateKeyCacheFile = "./private-key.cache" + +func loadCachedPrivateKey() ([]byte, error) { + bytes, err := os.ReadFile(privateKeyCacheFile) + if err != nil { + return nil, err + } + log.Println("Loading cached private key from file") + privateKeyB64 := strings.TrimSpace(string(bytes)) + privateKey, err := base64.StdEncoding.DecodeString(privateKeyB64) + if err != nil { + return nil, err + } + if len(privateKey) != 32 { + return nil, errors.New("invalid private key") + } + return privateKey, nil +} + +func saveCachedPrivateKey(privateKey []byte) error { + if len(privateKey) != 32 { + return errors.New("invalid private key") + } + return os.WriteFile(privateKeyCacheFile, []byte(base64.StdEncoding.EncodeToString(privateKey)+"\n"), 0600) +} + +func loadOrGeneratePrivateKey() ([]byte, error) { + privateKey, err := loadCachedPrivateKey() + if err == nil { + return privateKey, nil + } + log.Println("Generating new private key") + var k [32]byte + _, err = rand.Read(k[:]) + if err != nil { + return nil, err + } + k[0] &= 248 + k[31] = (k[31] & 127) | 64 + err = saveCachedPrivateKey(k[:]) + if err != nil { + return nil, err + } + return k[:], nil +} diff --git a/cmd/ircmirror/main.go b/cmd/ircmirror/main.go new file mode 100644 index 0000000..70db738 --- /dev/null +++ b/cmd/ircmirror/main.go @@ -0,0 +1,158 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "flag" + "fmt" + "log" + "math/rand" + "net" + "os" + "regexp" + "strings" + "sync" + "syscall" + "time" + + "golang.org/x/sys/unix" + "golang.zx2c4.com/irc/hbot" +) + +func raiseFileLimit() error { + var lim unix.Rlimit + err := unix.Getrlimit(syscall.RLIMIT_NOFILE, &lim) + if err != nil { + return err + } + if lim.Cur == lim.Max { + return nil + } + log.Printf("Raising file limit from %d to %d\n", lim.Cur, lim.Max) + lim.Cur = lim.Max + return unix.Setrlimit(syscall.RLIMIT_NOFILE, &lim) +} + +func main() { + accountIdArg := flag.String("account-id", "", "account ID number") + srcChannelArg := flag.String("src-channel", "", "source channel") + dstChannelArg := flag.String("dst-channel", "", "destination channel") + srcServerArg := flag.String("src-server", "", "source server") + dstServerArg := flag.String("dst-server", "", "destination server") + flag.Parse() + if matched, _ := regexp.MatchString(`^[0-9]+$`, *accountIdArg); !matched { + fmt.Fprintln(os.Stderr, "Invalid account ID") + flag.Usage() + os.Exit(1) + } + if matched, _ := regexp.MatchString(`^#[a-zA-Z0-9_-]+$`, *srcChannelArg); !matched { + fmt.Fprintln(os.Stderr, "Invalid source channel") + flag.Usage() + os.Exit(1) + } + if matched, _ := regexp.MatchString(`^#[a-zA-Z0-9_-]+$`, *dstChannelArg); !matched { + fmt.Fprintln(os.Stderr, "Invalid destination channel") + flag.Usage() + os.Exit(1) + } + if _, _, err := net.SplitHostPort(*srcServerArg); err != nil { + fmt.Fprintln(os.Stderr, "Invalid source server") + flag.Usage() + os.Exit(1) + } + if _, _, err := net.SplitHostPort(*dstServerArg); err != nil { + fmt.Fprintln(os.Stderr, "Invalid destination server") + flag.Usage() + os.Exit(1) + } + + privateKey, err := loadOrGeneratePrivateKey() + if err != nil { + log.Fatalln(err) + } + endpoints, err := getVpnEndpoints() + if err != nil { + log.Fatalln(err) + } + vpnConf, err := registerVpnConf(privateKey, *accountIdArg) + if err != nil { + log.Fatalln(err) + } + + rand.Seed(time.Now().UnixNano()) + err = raiseFileLimit() + if err != nil { + log.Fatalln(err) + } + + dialers, err := makeDialers(vpnConf, endpoints) + if err != nil { + log.Fatalln(err) + } + if len(dialers) < 2 { + log.Fatalln("Not enough dialers returned") + } + writers := newIrcWriterGroup(*dstServerArg, *dstChannelArg) + const writersPerIP = 10 + type nextDialer struct { + sync.Mutex + *dialer + } + dialNext := func(nd *nextDialer, v4 bool) { + var last *dialer + for { + nd.Lock() + if nd.dialer == last { + nd.dialer = &dialers[rand.Intn(len(dialers))] + } + last = nd.dialer + nd.Unlock() + name := last.name + dial := last.dial + if v4 { + name += "-v4" + dial, _ = last.splitByAf() + } else { + name += "-v6" + _, dial = last.splitByAf() + } + writers.runWriter(name, dial) + } + } + for i := 0; i < vpnProviderMaxEndpointsInParallel/2; i++ { + nd := new(nextDialer) + for i := 0; i < writersPerIP; i++ { + go dialNext(nd, true) + go dialNext(nd, false) + } + } + + srcDial := dialers[rand.Intn(len(dialers))] + logf := func(format string, args ...interface{}) { + log.Printf("[SRC %s] "+format, append([]interface{}{srcDial.name}, args...)...) + } + bot := hbot.NewBot(&hbot.Config{ + Host: *srcServerArg, + Nick: randomNick(), + Channels: []string{*srcChannelArg}, + Dial: srcDial.dial, + Logger: hbot.Logger{Verbosef: logf, Errorf: logf}, + }) + bot.AddTrigger(hbot.Trigger{ + Condition: func(b *hbot.Bot, m *hbot.Message) bool { + return m.Param(0) == *srcChannelArg && m.Command == "PRIVMSG" && + !strings.HasPrefix(m.Prefix.User, hbot.CommonBotUserPrefix) && + !strings.HasPrefix(m.Prefix.User, "~"+hbot.CommonBotUserPrefix) + }, + Action: func(b *hbot.Bot, m *hbot.Message) { + writers.queueMessage(m.Prefix.Name, m.Trailing()) + }, + }) + for { + bot.Run() + time.Sleep(time.Second * 5) + } +} diff --git a/cmd/ircmirror/net.go b/cmd/ircmirror/net.go new file mode 100644 index 0000000..4568d58 --- /dev/null +++ b/cmd/ircmirror/net.go @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "encoding/hex" + "fmt" + "log" + "net" + + "golang.zx2c4.com/wireguard/conn" + "golang.zx2c4.com/wireguard/device" + "golang.zx2c4.com/wireguard/tun/netstack" +) + +func makeNet(conf *vpnConf, endpoint vpnEndpoint) (*device.Device, *netstack.Net, error) { + var localAddresses, dnsServers []net.IP + for _, ip := range conf.ips { + localAddresses = append(localAddresses, ip.IPAddr().IP) + } + for _, ip := range conf.dnses { + dnsServers = append(dnsServers, ip.IPAddr().IP) + } + tun, stack, err := netstack.CreateNetTUN(localAddresses, dnsServers, 1420) + if err != nil { + return nil, nil, err + } + logf := func(format string, args ...interface{}) { + log.Printf("[NET %s] "+format, append([]interface{}{endpoint.name}, args...)...) + } + dev := device.NewDevice(tun, conn.NewStdNetBind(), &device.Logger{logf, logf}) + err = dev.IpcSet(fmt.Sprintf("private_key=%s\npublic_key=%s\nendpoint=%s\nallowed_ip=0.0.0.0/0\nallowed_ip=::/0\n", + hex.EncodeToString(conf.privateKey), hex.EncodeToString(endpoint.publicKey), endpoint.endpoint.String())) + if err != nil { + return nil, nil, err + } + err = dev.Up() + if err != nil { + return nil, nil, err + } + return dev, stack, nil +} + +type dialer struct { + name string + dial func(network, address string) (net.Conn, error) +} + +func makeDialers(conf *vpnConf, endpoints []vpnEndpoint) (dialers []dialer, err error) { + var devs []*device.Device + defer func() { + if err != nil { + for _, dev := range devs { + dev.Close() + } + } + }() + for _, endpoint := range endpoints { + dev, stack, err := makeNet(conf, endpoint) + if err != nil { + return nil, err + } + devs = append(devs, dev) + dialers = append(dialers, dialer{endpoint.name, stack.Dial}) + } + return dialers, nil +} + +func (d *dialer) splitByAf() (v4, v6 func(network, address string) (net.Conn, error)) { + return func(network, address string) (net.Conn, error) { + if len(network) == 3 { + network += "4" + } + return d.dial(network, address) + }, func(network, address string) (net.Conn, error) { + if len(network) == 3 { + network += "6" + } + return d.dial(network, address) + } +} diff --git a/cmd/ircmirror/vpnprovider.go b/cmd/ircmirror/vpnprovider.go new file mode 100644 index 0000000..634a3d5 --- /dev/null +++ b/cmd/ircmirror/vpnprovider.go @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "encoding/base64" + "encoding/json" + "errors" + "fmt" + "io" + "log" + "net/http" + "net/url" + "regexp" + "strings" + + "golang.org/x/crypto/curve25519" + "inet.af/netaddr" +) + +const vpnProviderMaxEndpointsInParallel = 20 + +type vpnEndpoint struct { + publicKey []byte + endpoint netaddr.IPPort + name string + country string +} + +type vpnConf struct { + privateKey []byte + ips []netaddr.IP + dnses []netaddr.IP +} + +type apiRelaysWireGuardV1Key []byte + +func (key *apiRelaysWireGuardV1Key) UnmarshalText(text []byte) error { + k, err := base64.StdEncoding.DecodeString(string(text)) + if err != nil { + return err + } + if len(k) != 32 { + return errors.New("key must be 32 bytes") + } + *key = k + return nil +} + +type apiRelaysWireGuardV1Relay struct { + Hostname string `json:"hostname"` + EndpointV4 netaddr.IP `json:"ipv4_addr_in"` + EndpointV6 netaddr.IP `json:"ipv6_addr_in"` + PublicKey apiRelaysWireGuardV1Key `json:"public_key"` + MultihopPort uint16 `json:"multihop_port"` +} + +type apiRelaysWireGuardV1City struct { + Name string `json:"name"` + Code string `json:"code"` + Latitude float64 `json:"latitude"` + Longitude float64 `json:"Longitude"` + Relays []apiRelaysWireGuardV1Relay `json:"relays"` +} + +type apiRelaysWireGuardV1Country struct { + Name string `json:"name"` + Code string `json:"code"` + Cities []apiRelaysWireGuardV1City `json:"cities"` +} +type apiRelaysWireGuardV1Root struct { + Countries []apiRelaysWireGuardV1Country `json:"countries"` +} + +func getVpnEndpoints() ([]vpnEndpoint, error) { + log.Println("Getting VPN server list") + resp, err := http.Get("https://api.mullvad.net/public/relays/wireguard/v1/") + if err != nil { + return nil, err + } + bytes, err := io.ReadAll(resp.Body) + if err != nil { + return nil, err + } + var relays apiRelaysWireGuardV1Root + err = json.Unmarshal(bytes, &relays) + if err != nil { + return nil, err + } + var endpoints []vpnEndpoint + for _, country := range relays.Countries { + for _, city := range country.Cities { + for _, relay := range city.Relays { + endpoints = append(endpoints, vpnEndpoint{ + publicKey: relay.PublicKey, + endpoint: netaddr.IPPortFrom(relay.EndpointV4, 51820), + name: strings.TrimSuffix(relay.Hostname, "-wireguard"), + }) + } + } + } + return endpoints, nil +} + +func registerVpnConf(privateKey []byte, accountId string) (*vpnConf, error) { + log.Println("Registering VPN private key") + publicKey, err := curve25519.X25519(privateKey, curve25519.Basepoint) + if err != nil { + return nil, err + } + resp, err := http.PostForm("https://api.mullvad.net/wg/", url.Values{ + "account": {accountId}, + "pubkey": {base64.StdEncoding.EncodeToString(publicKey)}, + }) + if err != nil { + return nil, err + } + ipBytes, err := io.ReadAll(resp.Body) + if err != nil { + return nil, err + } + if match, _ := regexp.Match(`^[0-9a-f:/.,]+$`, ipBytes); !match { + return nil, fmt.Errorf("registration rejected: %q", string(ipBytes)) + } + conf := &vpnConf{privateKey: privateKey, dnses: []netaddr.IP{netaddr.MustParseIP("193.138.218.74")}} + for _, ipStr := range strings.Split(string(ipBytes), ",") { + ip, err := netaddr.ParseIPPrefix(strings.TrimSpace(ipStr)) + if err != nil { + return nil, err + } + conf.ips = append(conf.ips, ip.IP()) + } + return conf, nil +} diff --git a/cmd/wurgurboo/cgit.go b/cmd/wurgurboo/cgit.go new file mode 100644 index 0000000..8fd56b8 --- /dev/null +++ b/cmd/wurgurboo/cgit.go @@ -0,0 +1,178 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "container/list" + "encoding/hex" + "encoding/xml" + "io" + "log" + "net/http" + "path" + "sync" + "time" +) + +type CgitCommit struct { + Text string `xml:",chardata"` + Title string `xml:"title"` + Updated string `xml:"updated"` + Author struct { + Text string `xml:",chardata"` + Name string `xml:"name"` + Email string `xml:"email"` + } `xml:"author"` + Published string `xml:"published"` + Link struct { + Text string `xml:",chardata"` + Rel string `xml:"rel,attr"` + Type string `xml:"type,attr"` + Href string `xml:"href,attr"` + } `xml:"link"` + ID string `xml:"id"` + Content []struct { + Text string `xml:",chardata"` + Type string `xml:"type,attr"` + Div struct { + Text string `xml:",chardata"` + Xmlns string `xml:"xmlns,attr"` + Pre string `xml:"pre"` + } `xml:"div"` + } `xml:"content"` +} + +type cgitFeed struct { + XMLName xml.Name `xml:"feed"` + Text string `xml:",chardata"` + Xmlns string `xml:"xmlns,attr"` + Title string `xml:"title"` + Subtitle string `xml:"subtitle"` + Link struct { + Text string `xml:",chardata"` + Rel string `xml:"rel,attr"` + Type string `xml:"type,attr"` + Href string `xml:"href,attr"` + } `xml:"link"` + Entry []CgitCommit `xml:"entry"` +} + +type cgitFeedStatus struct { + repo string + title string + seenEntries map[[32]byte]bool + orderedEntries list.List +} + +type CgitFeedMonitorer struct { + feeds []*cgitFeedStatus + updates chan CgitFeedUpdate + ticker *time.Ticker + wg sync.WaitGroup + mu sync.Mutex +} + +type CgitFeedUpdate struct { + RepoTitle string + Commit *CgitCommit +} + +func NewCgitFeedMonitorer(pollInterval time.Duration) *CgitFeedMonitorer { + fm := &CgitFeedMonitorer{ + updates: make(chan CgitFeedUpdate, 32), + ticker: time.NewTicker(pollInterval), + } + fm.wg.Add(1) + go func() { + defer fm.wg.Done() + for range fm.ticker.C { + fm.mu.Lock() + for _, feed := range fm.feeds { + fm.wg.Add(1) + go func(feed *cgitFeedStatus) { + defer fm.wg.Done() + fm.updateFeed(feed, true) + }(feed) + } + fm.mu.Unlock() + } + }() + return fm +} + +func (fm *CgitFeedMonitorer) Stop() { + fm.ticker.Stop() + fm.wg.Wait() + close(fm.updates) +} + +func (fm *CgitFeedMonitorer) Updates() <-chan CgitFeedUpdate { + return fm.updates +} + +func (fm *CgitFeedMonitorer) AddFeed(repo string) { + go func() { + status := &cgitFeedStatus{ + repo: repo, + title: path.Base(repo), + seenEntries: make(map[[32]byte]bool, 1024), + } + fm.updateFeed(status, false) + fm.mu.Lock() + fm.feeds = append(fm.feeds, status) + fm.mu.Unlock() + }() +} + +func (fm *CgitFeedMonitorer) updateFeed(fs *cgitFeedStatus, alert bool) { + feed, err := fs.fetchFeed() + if err != nil { + log.Printf("Unable to fetch commits for %q: %v", fs.title, err) + return + } + for i := len(feed.Entry) - 1; i >= 0; i-- { + commit := &feed.Entry[i] + var commitID [32]byte + if hex.DecodedLen(len(commit.ID)) > len(commitID) { + continue + } + n, err := hex.Decode(commitID[:], []byte(commit.ID)) + if err != nil || n < 20 { + continue + } + if _, ok := fs.seenEntries[commitID]; ok { + continue + } + fs.seenEntries[commitID] = true + fs.orderedEntries.PushBack(commitID) + for len(fs.seenEntries) > 1024 { + first := fs.orderedEntries.Front() + delete(fs.seenEntries, first.Value.([32]byte)) + fs.orderedEntries.Remove(first) + } + if alert { + fm.updates <- CgitFeedUpdate{fs.title, commit} + } + } +} + +func (fs *cgitFeedStatus) fetchFeed() (*cgitFeed, error) { + resp, err := http.Get(fs.repo + "/atom/") + if err != nil { + return nil, err + } + bytes, err := io.ReadAll(resp.Body) + resp.Body.Close() + if err != nil { + return nil, err + } + var feed cgitFeed + err = xml.Unmarshal(bytes, &feed) + if err != nil { + return nil, err + } + return &feed, nil +} diff --git a/cmd/wurgurboo/main.go b/cmd/wurgurboo/main.go new file mode 100644 index 0000000..6363784 --- /dev/null +++ b/cmd/wurgurboo/main.go @@ -0,0 +1,101 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2021 Jason A. Donenfeld. All Rights Reserved. + */ + +package main + +import ( + "bufio" + "flag" + "fmt" + "log" + "net" + "os" + "regexp" + "time" + + "golang.zx2c4.com/irc/hbot" +) + +func main() { + channelArg := flag.String("channel", "", "channel to join") + serverArg := flag.String("server", "", "server and port") + nickArg := flag.String("nick", "", "nickname") + passwordArg := flag.String("password-file", "", "optional file with password") + flag.Parse() + if matched, _ := regexp.MatchString(`^#[a-zA-Z0-9_-]+$`, *channelArg); !matched { + fmt.Fprintln(os.Stderr, "Invalid channel") + flag.Usage() + os.Exit(1) + } + if _, _, err := net.SplitHostPort(*serverArg); err != nil { + fmt.Fprintln(os.Stderr, "Invalid server") + flag.Usage() + os.Exit(1) + } + if matched, _ := regexp.MatchString(`^[a-zA-Z0-9\[\]_-]{1,16}$`, *nickArg); !matched { + fmt.Fprintln(os.Stderr, "Invalid nick") + flag.Usage() + os.Exit(1) + } + password := "" + if len(*passwordArg) > 0 { + f, err := os.Open(*passwordArg) + if err != nil { + fmt.Fprintf(os.Stderr, "Unable to open password file: %v\n", err) + os.Exit(1) + } + password, err = bufio.NewReader(f).ReadString('\n') + f.Close() + if err != nil { + fmt.Fprintf(os.Stderr, "Unable to read password file: %v\n", err) + os.Exit(1) + } + if len(password) > 0 && password[len(password)-1] == '\n' { + password = password[:len(password)-1] + } + } + + feeds := NewCgitFeedMonitorer(time.Second * 10) + feeds.AddFeed("https://git.zx2c4.com/wireguard-linux/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-tools/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-linux-compat/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-windows/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-go/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-freebsd/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-openbsd/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-android/") + feeds.AddFeed("https://git.zx2c4.com/android-wireguard-module-builder/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-apple/") + feeds.AddFeed("https://git.zx2c4.com/wireguard-rs/") + feeds.AddFeed("https://git.zx2c4.com/wintun/") + feeds.AddFeed("https://git.zx2c4.com/wg-dynamic/") + + bot := hbot.NewBot(&hbot.Config{ + Host: *serverArg, + Nick: *nickArg, + Realname: "Your Friendly Neighborhood WurGur Bot", + Channels: []string{*channelArg}, + Logger: hbot.Logger{Verbosef: log.Printf, Errorf: log.Printf}, + Password: password, + }) + + urlShortener := regexp.MustCompile(`(.*\?id=[a-f0-9]{8})([a-f0-9]+)$`) + go func() { + for commit := range feeds.Updates() { + <-bot.Joined() + log.Printf("New commit %s in %s", commit.Commit.ID, commit.RepoTitle) + url := commit.Commit.Link.Href + if matches := urlShortener.FindStringSubmatch(url); len(matches) == 3 { + url = matches[1] + } + bot.Msg(*channelArg, fmt.Sprintf("\x01ACTION found a new commit in \x0303%s\x0f - \x0306%s\x0f - %s\x01", commit.RepoTitle, commit.Commit.Title, url)) + } + }() + + for { + bot.Run() + time.Sleep(time.Second * 5) + } +} @@ -0,0 +1,11 @@ +module golang.zx2c4.com/irc + +go 1.16 + +require ( + golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a + golang.org/x/sys v0.0.0-20210525143221-35b2ab0089ea + golang.zx2c4.com/wireguard v0.0.0-20210525143454-64cb82f2b3f5 + golang.zx2c4.com/wireguard/tun/netstack v0.0.0-20210525143454-64cb82f2b3f5 + inet.af/netaddr v0.0.0-20210526175434-db50905a50be +) @@ -0,0 +1,619 @@ +bazil.org/fuse v0.0.0-20160811212531-371fbbdaa898/go.mod h1:Xbm+BRKSBEpa4q4hTSxohYNQpsxXPbPry4JJWOB3LB8= +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod 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+1,151 @@ +package hbot + +import ( + "bufio" + "fmt" + "strings" + "unicode/utf8" +) + +// Action sends an action to 'who' (user or channel) +func (bot *Bot) Action(who, text string) { + msg := fmt.Sprintf("\u0001ACTION %s\u0001", text) + bot.Msg(who, msg) +} + +// ChMode is used to change users modes in a channel +// operator = "+o" deop = "-o" +// ban = "+b" +func (bot *Bot) ChMode(user, channel, mode string) { + bot.Send("MODE " + channel + " " + mode + " " + user) +} + +// Join a channel +func (bot *Bot) Join(ch string) { + bot.Send("JOIN " + ch) +} + +// Msg sends a message to 'who' (user or channel) +func (bot *Bot) Msg(who, text string) { + const command = "PRIVMSG" + for _, line := range bot.splitText(text, command, who) { + bot.Send(command + " " + who + " :" + line) + } +} + +// MsgMaxSize returns maximum number of bytes that fit into one message. +// Useful, for example, if you want to generate a wall of emojis that fit into one message, +// or you want to cap some output to one message +func (bot *Bot) MsgMaxSize(who string) int { + const command = "PRIVMSG" + maxSize := bot.maxMsgSize(command, who) + return maxSize +} + +// Notice sends a NOTICE message to 'who' (user or channel) +func (bot *Bot) Notice(who, text string) { + const command = "NOTICE" + for _, line := range bot.splitText(text, command, who) { + bot.Send(command + " " + who + " :" + line) + } +} + +// NoticeMaxSize returns maximum number of bytes that fit into one message. +// Useful, for example, if you want to generate a wall of emojis that fit into one message, +// or you want to cap some output to one message +func (bot *Bot) NoticeMaxSize(who string) int { + const command = "NOTICE" + maxSize := bot.maxMsgSize(command, who) + return maxSize +} + +// Part a channel +func (bot *Bot) Part(ch, msg string) { + bot.Send("PART " + ch + " " + msg) +} + +// Reply sends a message to where the message came from (user or channel) +func (bot *Bot) Reply(m *Message, text string) { + bot.Msg(replyTarget(m), text) +} + +// ReplyMaxSize is just like MsgMaxSize +// but calculates message size for the reply target +func (bot *Bot) ReplyMaxSize(m *Message) int { + const command = "PRIVMSG" + maxSize := bot.maxMsgSize(command, replyTarget(m)) + return maxSize +} + +// Send any command to the server +func (bot *Bot) Send(command string) { + bot.outgoing <- command +} + +// SetNick sets the bots nick on the irc server. +// This does not alter *Bot.Nick, so be vary of that +func (bot *Bot) SetNick(nick string) { + bot.Send(fmt.Sprintf("NICK %s", nick)) +} + +// Topic sets the channel 'c' topic (requires bot has proper permissions) +func (bot *Bot) Topic(c, topic string) { + str := fmt.Sprintf("TOPIC %s :%s", c, topic) + bot.Send(str) +} + +func (bot *Bot) maxMsgSize(command, who string) int { + // Maximum message size that fits into 512 bytes. + // Carriage return and linefeed are not counted here as they + // are added by handleOutgoingMessages() + maxSize := 510 - len(fmt.Sprintf(":%s %s %s :", bot.Prefix(), command, who)) + if _, present := bot.CapStatus(CapIdentifyMsg); present { + maxSize-- + } + // https://ircv3.net/specs/extensions/multiline + if bot.config.MsgSafetyBuffer { + maxSize -= 10 + } + return maxSize +} + +func replyTarget(m *Message) string { + if to := m.Param(0); strings.Contains(to, "#") { + return to + } + return m.Prefix.Name +} + +// Splits a given string into a string slice, in chunks ending +// either with \n, or with \r\n, or splitting text to maximally allowed size. +func (bot *Bot) splitText(text, command, who string) []string { + var ret []string + + // Sanitize input + text = strings.ToValidUTF8(text, "") + + maxSize := bot.maxMsgSize(command, who) + + scanner := bufio.NewScanner(strings.NewReader(text)) + for scanner.Scan() { + line := scanner.Text() + for len(line) > maxSize { + totalSize := 0 + runeSize := 0 + // utf-8 aware splitting + for _, v := range line { + runeSize = utf8.RuneLen(v) + if totalSize+runeSize > maxSize { + ret = append(ret, line[:totalSize]) + line = line[totalSize:] + totalSize = runeSize + continue + } + totalSize += runeSize + } + + } + ret = append(ret, line) + } + return ret +} diff --git a/hbot/hbot.go b/hbot/hbot.go new file mode 100644 index 0000000..60fbb08 --- /dev/null +++ b/hbot/hbot.go @@ -0,0 +1,314 @@ +// Package hbot is IRCv3 enabled framework for writing IRC bots +package hbot + +import ( + "bufio" + "crypto/tls" + "fmt" + "net" + "strconv" + "strings" + "sync" + "time" +) + +// Bot implements an irc bot to be connected to a given server +type Bot struct { + config Config + con net.Conn + outgoing chan string + handlers []Handler + mu sync.Mutex + joinOnce sync.Once + closeOnce sync.Once + wg sync.WaitGroup + capHandler ircCaps + prefix Prefix + prefixMu sync.RWMutex + joined chan struct{} +} + +type Logger struct { + Verbosef func(format string, args ...interface{}) + Errorf func(format string, args ...interface{}) +} + +func DiscardLogf(format string, args ...interface{}) {} + +type TLSKnob int + +const ( + AutoTLS TLSKnob = iota + YesTLS + NoTLS +) + +type Config struct { + Host string + Nick string + Realname string + User string + Password string + Channels []string + SASL bool + MsgSafetyBuffer bool // Set it if long messages get truncated on the receiving end + Dial func(network, addr string) (net.Conn, error) // An optional custom function for connecting to the server + ThrottleDelay time.Duration // Duration to wait between sending of messages to avoid being kicked by the server for flooding (default 200ms) + PingTimeout time.Duration // Maximum time between incoming data + UseTLS TLSKnob + TLSConfig tls.Config + Logger Logger +} + +// CommonBotUserPrefix may be optionally used as a user prefix or realname to identify as a bot. +// e.g. `/mode #CHANNEL +q $~x:*!~botsan-*@*` or `/mode #CHANNEL +q $~r:botsan-*`. +const CommonBotUserPrefix = "botsan-" + +// NewBot creates a new instance of Bot +func NewBot(conf *Config) *Bot { + bot := Bot{config: *conf, joined: make(chan struct{})} + + if bot.config.ThrottleDelay == 0 { + bot.config.ThrottleDelay = 200 * time.Millisecond + } + if bot.config.PingTimeout == 0 { + bot.config.PingTimeout = 300 * time.Second + } + if bot.config.Logger.Verbosef == nil { + bot.config.Logger.Verbosef = DiscardLogf + } + if bot.config.Logger.Errorf == nil { + bot.config.Logger.Errorf = DiscardLogf + } + if len(bot.config.Realname) == 0 { + bot.config.Realname = bot.config.Nick + } + if len(bot.config.User) == 0 { + bot.config.User = bot.config.Nick + } + if len(bot.config.Nick) > 16 { + bot.config.Nick = bot.config.Nick[:16] + } + + bot.AddTrigger(pingPong) + bot.AddTrigger(joinChannels) + bot.AddTrigger(getPrefix) + bot.AddTrigger(setNick) + bot.AddTrigger(nickError) + bot.AddTrigger(&bot.capHandler) + bot.AddTrigger(saslFail) + bot.AddTrigger(saslSuccess) + bot.AddTrigger(errorLogger) + return &bot +} + +// Joined returns a channel that closes after channels are joined +func (bot *Bot) Joined() <-chan struct{} { + bot.mu.Lock() + defer bot.mu.Unlock() + return bot.joined +} + +// saslAuthenticate performs SASL authentication +// ref: https://github.com/atheme/charybdis/blob/master/doc/sasl.txt +func (bot *Bot) saslAuthenticate(user, pass string) { + bot.capHandler.saslEnable() + bot.capHandler.saslCreds(user, pass) + bot.config.Logger.Verbosef("Beginning sasl authentication") + bot.Send("CAP LS") + bot.sendUserCommand(bot.config.User, bot.config.Realname, "0") + bot.SetNick(bot.config.Nick) +} + +// standardRegistration performs a basic set of registration commands +func (bot *Bot) standardRegistration() { + bot.Send("CAP LS") + // Server registration + if bot.config.Password != "" { + bot.Send("PASS " + bot.config.Password) + } + bot.config.Logger.Verbosef("Sending standard registration") + bot.sendUserCommand(bot.config.User, bot.config.Realname, "0") + bot.SetNick(bot.config.Nick) +} + +// Set username, real name, and mode +func (bot *Bot) sendUserCommand(user, realname, mode string) { + bot.Send(fmt.Sprintf("USER %s %s * :%s", user, mode, realname)) +} + +func (bot *Bot) connect(host string) error { + bot.config.Logger.Verbosef("Connecting") + + dial := bot.config.Dial + if dial == nil { + dial = net.Dial + } + var err error + bot.con, err = dial("tcp", host) + if err != nil { + return err + } + if bot.config.UseTLS == AutoTLS { + _, portStr, _ := net.SplitHostPort(host) + port, _ := strconv.Atoi(portStr) + switch port { + case 6667: + bot.config.UseTLS = NoTLS + case 6697: + bot.config.UseTLS = YesTLS + default: + bot.config.Logger.Errorf("Warning: port is neither the standard TCP port (6667) nor the standard TLS port (6697); falling back to TCP") + bot.config.UseTLS = NoTLS + } + } + if bot.config.UseTLS == YesTLS { + if len(bot.config.TLSConfig.ServerName) == 0 { + hostname, _, err := net.SplitHostPort(host) + if err != nil { + return err + } + bot.config.TLSConfig.ServerName = hostname + } + bot.con = tls.Client(bot.con, &bot.config.TLSConfig) + } + return nil +} + +// Incoming message gathering routine +func (bot *Bot) handleIncomingMessages() { + defer bot.wg.Done() + scan := bufio.NewScanner(bot.con) + for scan.Scan() { + // Disconnect if we have seen absolutely nothing for 300 seconds + bot.con.SetDeadline(time.Now().Add(bot.config.PingTimeout)) + text := scan.Text() + msg := ParseMessage(text) + go func() { + for _, h := range bot.handlers { + go h.Handle(bot, msg) + } + }() + } + bot.close("incoming", scan.Err()) +} + +// Handles message speed throtling +func (bot *Bot) handleOutgoingMessages() { + defer bot.wg.Done() + for s := range bot.outgoing { + _, err := fmt.Fprint(bot.con, s+"\r\n") + if err != nil { + bot.close("outgoing", err) + return + } + time.Sleep(bot.config.ThrottleDelay) + } +} + +// Run starts the bot and connects to the server. Blocks until we disconnect from the server. +func (bot *Bot) Run() { + bot.mu.Lock() + bot.joinOnce = sync.Once{} + bot.closeOnce = sync.Once{} + bot.wg = sync.WaitGroup{} + bot.capHandler.reset() + bot.outgoing = make(chan string, 128) + bot.prefix = Prefix{ + Name: bot.config.Nick, + User: bot.config.Nick, + Host: strings.Repeat("*", 510-353-len(bot.config.Nick)*2), + } + bot.mu.Unlock() + + // Attempt reconnection + err := bot.connect(bot.config.Host) + if err != nil { + bot.config.Logger.Errorf("Connection error: %v", err) + return + } + bot.config.Logger.Verbosef("Connected") + + bot.wg.Add(2) + go bot.handleIncomingMessages() + go bot.handleOutgoingMessages() + if bot.config.SASL { + bot.saslAuthenticate(bot.config.Nick, bot.config.Password) + } else { + bot.standardRegistration() + } + bot.wg.Wait() + bot.mu.Lock() + bot.joined = make(chan struct{}) + bot.mu.Unlock() + bot.config.Logger.Verbosef("Disconnected") +} + +// CapStatus returns whether the server capability is enabled and present +func (bot *Bot) CapStatus(cap string) (enabled, present bool) { + bot.capHandler.mu.Lock() + defer bot.capHandler.mu.Unlock() + if v, ok := bot.capHandler.capsEnabled[cap]; ok { + return v, true + } + return false, false +} + +func (bot *Bot) close(fault string, err error) { + bot.closeOnce.Do(func() { + if err != nil { + bot.config.Logger.Errorf("Closing from %s: %v", fault, err) + } + bot.con.Close() + select { + case bot.outgoing <- "PING": + default: + } + }) +} + +// Close closes the bot +func (bot *Bot) Close() { + bot.close("", nil) +} + +// Prefix returns the bot's prefix. +func (bot *Bot) Prefix() Prefix { + bot.mu.Lock() + defer bot.mu.Unlock() + return bot.prefix +} + +// Nick returns the bot's nick. +func (bot *Bot) Nick() string { + bot.mu.Lock() + defer bot.mu.Unlock() + return bot.config.Nick +} + +// Handler is used to subscribe and react to events on the bot Server +type Handler interface { + Handle(*Bot, *Message) +} + +// Trigger is a Handler which is guarded by a condition. +// DO NOT alter *Message in your triggers or you'll have strange things happen. +type Trigger struct { + // Returns true if this trigger applies to the passed in message + Condition func(*Bot, *Message) bool + + // The action to perform if Condition is true + Action func(*Bot, *Message) +} + +// AddTrigger adds a trigger to the bot's handlers +func (bot *Bot) AddTrigger(h Handler) { + bot.handlers = append(bot.handlers, h) +} + +// Handle executes the trigger action if the condition is satisfied +func (t Trigger) Handle(bot *Bot, m *Message) { + if t.Condition(bot, m) { + t.Action(bot, m) + } +} diff --git a/hbot/internaltriggers.go b/hbot/internaltriggers.go new file mode 100644 index 0000000..4e7b1ce --- /dev/null +++ b/hbot/internaltriggers.go @@ -0,0 +1,112 @@ +package hbot + +import ( + "fmt" + "strings" +) + +// A trigger to respond to the servers ping pong messages. +// If PingPong messages are not responded to, the server assumes the +// client has timed out and will close the connection. +var pingPong = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "PING" + }, + Action: func(bot *Bot, m *Message) { + bot.Send("PONG :" + m.Trailing()) + }, +} + +var joinChannels = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "001" || m.Command == "372" + }, + Action: func(bot *Bot, m *Message) { + bot.joinOnce.Do(func() { + for _, channel := range bot.config.Channels { + splitchan := strings.SplitN(channel, ":", 2) + bot.config.Logger.Verbosef("Joining %q", channel) + if len(splitchan) == 2 { + channel = splitchan[0] + password := splitchan[1] + bot.Send(fmt.Sprintf("JOIN %s %s", channel, password)) + } else { + bot.Send(fmt.Sprintf("JOIN %s", channel)) + } + } + // Fire Joined + select { + case <-bot.joined: + default: + close(bot.joined) + } + }) + }, +} + +// Get bot's prefix by catching its own join +var getPrefix = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "JOIN" && m.Prefix.Name == bot.Nick() + }, + Action: func(bot *Bot, m *Message) { + bot.mu.Lock() + bot.config.Nick = m.Prefix.Name + bot.prefix = m.Prefix + bot.mu.Unlock() + }, +} + +// Track nick changes internally so we can adjust the bot's prefix +var setNick = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "NICK" && m.Prefix.Name == bot.Nick() + }, + Action: func(bot *Bot, m *Message) { + to := m.Param(0) + bot.mu.Lock() + bot.config.Nick = to + bot.prefix.Name = to + bot.mu.Unlock() + bot.config.Logger.Verbosef("Nick changed to %q", to) + }, +} + +// Throw errors on invalid nick changes +var nickError = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "436" || m.Command == "433" || + m.Command == "432" || m.Command == "431" || m.Command == "400" + }, + Action: func(bot *Bot, m *Message) { + bot.config.Logger.Errorf("Nick change error %q: %q", m.Command, m.Params) + }, +} + +var saslFail = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "904" || m.Command == "905" || + m.Command == "906" || m.Command == "907" + }, + Action: func(bot *Bot, m *Message) { + bot.config.Logger.Errorf("SASL error %q: %q", m.Command, m.Params) + }, +} + +var saslSuccess = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "900" || m.Command == "903" + }, + Action: func(bot *Bot, m *Message) { + bot.config.Logger.Verbosef("SASL success: %q", m.Trailing()) + }, +} + +var errorLogger = Trigger{ + Condition: func(bot *Bot, m *Message) bool { + return m.Command == "ERROR" + }, + Action: func(bot *Bot, m *Message) { + bot.config.Logger.Errorf("Server error: %q", m.Trailing()) + }, +} diff --git a/hbot/irc_caps.go b/hbot/irc_caps.go new file mode 100644 index 0000000..b5b881f --- /dev/null +++ b/hbot/irc_caps.go @@ -0,0 +1,154 @@ +package hbot + +import ( + "bytes" + "encoding/base64" + "strings" + "sync" +) + +type ircCaps struct { + saslOn bool + saslUser string + saslPass string + caps []string + capsEnabled map[string]bool + mu sync.Mutex + done bool +} + +func (c *ircCaps) saslEnable() { + c.mu.Lock() + c.saslOn = true + c.mu.Unlock() +} + +func (c *ircCaps) saslCreds(user, pass string) { + c.mu.Lock() + c.saslUser = user + c.saslPass = pass + c.mu.Unlock() +} + +func (c *ircCaps) reset() { + c.mu.Lock() + c.saslOn = false + c.done = false + c.caps = []string{} + c.capsEnabled = make(map[string]bool) + c.mu.Unlock() +} + +func (c *ircCaps) saslAuth(m *Message) bool { + return m.Command == "AUTHENTICATE" && m.Param(0) == "+" +} + +func (c *ircCaps) capLS(m *Message) bool { + return m.Command == "CAP" && m.Param(1) == "LS" +} + +func (c *ircCaps) capACK(m *Message) bool { + return m.Command == "CAP" && m.Param(1) == "ACK" +} + +func (c *ircCaps) Handle(bot *Bot, m *Message) { + c.mu.Lock() + defer c.mu.Unlock() + if c.done { + return + } + + if c.capLS(m) { + for _, cap := range strings.Split(m.Trailing(), " ") { + if _, ok := allowedCAPs[cap]; ok { + c.capsEnabled[cap] = true + c.caps = append(c.caps, cap) + } else { + c.capsEnabled[cap] = false + } + } + bot.Send("CAP REQ :" + strings.Join(c.caps, " ")) + } + + if c.capACK(m) { + if c.saslOn && strings.Contains(m.Trailing(), "sasl") { + bot.Send("AUTHENTICATE PLAIN") + } else { + if c.saslOn { + bot.config.Logger.Errorf("SASL is not supported, despite request") + } + bot.Send("CAP END") + c.done = true + } + } + + if c.saslAuth(m) { + out := bytes.Join([][]byte{[]byte(c.saslUser), []byte(c.saslUser), []byte(c.saslPass)}, []byte{0}) + encpass := base64.StdEncoding.EncodeToString(out) + bot.Send("AUTHENTICATE " + encpass) + bot.Send("CAP END") + c.done = true + } +} + +// Capabilities we can deal with +// without doing crazy things in the library +var allowedCAPs = map[string]struct{}{ + CapAccountNotify: {}, + CapAwayNotify: {}, + CapExtendedJoin: {}, + CapSASL: {}, + CapChghost: {}, + CapInviteNotify: {}, + CapMultiPrefix: {}, + CapCapNotify: {}, + CapSetName: {}, + CapServerTime: {}, + CapAccountTag: {}, + CapMessageTags: {}, +} + +// CapAccountNotify is account-notify CAP +const CapAccountNotify = "account-notify" + +// CapAwayNotify is away-notify CAP +const CapAwayNotify = "away-notify" + +// CapExtendedJoin is extended-join CAP +const CapExtendedJoin = "extended-join" + +// CapSASL is SASL CAP +const CapSASL = "sasl" + +// CapChghost is chghost CAP +const CapChghost = "chghost" + +// CapInviteNotify is invite-notify CAP +const CapInviteNotify = "invite-notify" + +// CapMultiPrefix is multi-prefix CAP +const CapMultiPrefix = "multi-prefix" + +// CapUserhostInNames is userhost-in-names CAP +const CapUserhostInNames = "userhost-in-names" + +// CapCapNotify is cap-notify CAP +const CapCapNotify = "cap-notify" + +// CapIdentifyMsg is identify-msg CAP +const CapIdentifyMsg = "identify-msg" + +// CapTLS is tls CAP +const CapTLS = "tls" + +// CapSetName is setname CAP +const CapSetName = "setname" + +// CapServerTime is server-time CAP +const CapServerTime = "server-time" + +// CapAccountTag is account-tag CAP +const CapAccountTag = "account-tag" + +// CapMessageTags is message-tags CAP +const CapMessageTags = "message-tags" diff --git a/hbot/message.go b/hbot/message.go new file mode 100644 index 0000000..4fba7c0 --- /dev/null +++ b/hbot/message.go @@ -0,0 +1,420 @@ +package hbot + +import ( + "bytes" + "strings" +) + +// Various constants used for formatting IRC messages. +const ( + tags byte = 0x40 // Tag start indicator + tagsEquals byte = 0x3D // Keys and values are separated using equal signs + tagsSeparator byte = 0x3B // Separator between multiple tags + prefix byte = 0x3A // Prefix or last argument + prefixUser byte = 0x21 // Username + prefixHost byte = 0x40 // Hostname + space byte = 0x20 // Separator + + maxLength = 510 // Maximum length is 512 - 2 for the line endings. +) + +var ( + tagEscapeReplacer = strings.NewReplacer("\\:", ";", "\\s", " ", "\\r", "\r", "\\n", "\n") +) + +func cutsetFunc(r rune) bool { + // Characters to trim from prefixes/messages. + return r == '\r' || r == '\n' +} + +// Tags represents (optional) tags added to the start of each message +// See IRCv3.2 Message Tags (http://ircv3.net/specs/core/message-tags-3.2.html) +// +// <message> ::= ['@' <tags> <SPACE>] [':' <prefix> <SPACE> ] <command> <params> <crlf> +// <tags> ::= <tag> [';' <tag>]* +// <tag> ::= <key> ['=' <escaped value>] +// <key> ::= [ <vendor> '/' ] <sequence of letters, digits, hyphens (`-`)> +// <escaped value> ::= <sequence of any characters except NUL, CR, LF, semicolon (`;`) and SPACE> +// <vendor> ::= <host> +type Tags map[string]string + +// ParseTags takes a string and attempts to create a Tags struct +func ParseTags(raw string) (t Tags) { + t = make(Tags) + + tags := strings.Split(raw, string(tagsSeparator)) + + for _, val := range tags { + replacedVal := tagEscapeReplacer.Replace(val) + tagParts := strings.SplitN(replacedVal, string(tagsEquals), 2) + // Tag must at least contain a key + if len(tagParts) < 1 { + continue + } + + // Tag only contains key, set empty value + if len(tagParts) == 1 { + t[tagParts[0]] = "" + continue + } + + t[tagParts[0]] = tagParts[1] + } + + return t +} + +// GetTag checks whether a tag with the given key exists. The boolean return value indicates whether a value was found +func (t Tags) GetTag(key string) (string, bool) { + if t != nil { + if val, ok := t[key]; ok { + return val, true + } + } + + return "", false +} + +// writeTo is an utility function to write the tags list to a bytes.Buffer. +func (t Tags) writeTo(buffer *bytes.Buffer) { + buffer.WriteByte(tags) + + i := 0 + mapLen := len(t) + for k, v := range t { + buffer.WriteString(k) + if v != "" { + buffer.WriteByte(tagsEquals) + buffer.WriteString(v) + } + if i != mapLen-1 { + buffer.WriteByte(tagsSeparator) + } + + i++ + } +} + +// Bytes returns the []byte representation of this collection of message tags +func (t Tags) Bytes() []byte { + if t == nil { + return nil + } + + buffer := new(bytes.Buffer) + t.writeTo(buffer) + return buffer.Bytes() +} + +// String returns the string representation of all set message tags +func (t Tags) String() (s string) { + return string(t.Bytes()) +} + +// Prefix represents the prefix (sender) of an IRC message. +// See RFC1459 section 2.3.1. +// +// <servername> | <nick> [ '!' <user> ] [ '@' <host> ] +// +type Prefix struct { + Name string // Nick- or servername + User string // Username + Host string // Hostname +} + +func indexByte(s string, c byte) int { + return strings.IndexByte(s, c) +} + +// ParsePrefix takes a string and attempts to create a Prefix struct. +func ParsePrefix(raw string) (p Prefix) { + user := indexByte(raw, prefixUser) + host := indexByte(raw, prefixHost) + switch { + case user > 0 && host > user: + p.Name = raw[:user] + p.User = raw[user+1 : host] + p.Host = raw[host+1:] + + case user > 0: + p.Name = raw[:user] + p.User = raw[user+1:] + + case host > 0: + p.Name = raw[:host] + p.Host = raw[host+1:] + + default: + p.Name = raw + + } + return +} + +// Empty determines whether the prefix is empty. +func (p *Prefix) Empty() bool { + return len(p.User)+len(p.Host)+len(p.Name) == 0 +} + +// Len calculates the length of the string representation of this prefix. +func (p *Prefix) Len() (length int) { + length = len(p.Name) + if len(p.User) > 0 { + length = length + len(p.User) + 1 + } + if len(p.Host) > 0 { + length = length + len(p.Host) + 1 + } + return +} + +// Bytes returns a []byte representation of this prefix. +func (p *Prefix) Bytes() []byte { + buffer := new(bytes.Buffer) + p.writeTo(buffer) + return buffer.Bytes() +} + +// String returns a string representation of this prefix. +func (p *Prefix) String() (s string) { + // Benchmarks revealed that in this case simple string concatenation + // is actually faster than using a ByteBuffer as in (*Message).String() + s = p.Name + if len(p.User) > 0 { + s = s + string(prefixUser) + p.User + } + if len(p.Host) > 0 { + s = s + string(prefixHost) + p.Host + } + return +} + +// IsHostmask returns true if this prefix looks like a user hostmask. +func (p *Prefix) IsHostmask() bool { + return len(p.User) > 0 && len(p.Host) > 0 +} + +// IsServer returns true if this prefix looks like a server name. +func (p *Prefix) IsServer() bool { + return len(p.User) <= 0 && len(p.Host) <= 0 // && indexByte(p.Name, '.') > 0 +} + +// writeTo is an utility function to write the prefix to the bytes.Buffer in Message.String(). +func (p *Prefix) writeTo(buffer *bytes.Buffer) { + buffer.WriteString(p.Name) + if len(p.User) > 0 { + buffer.WriteByte(prefixUser) + buffer.WriteString(p.User) + } + if len(p.Host) > 0 { + buffer.WriteByte(prefixHost) + buffer.WriteString(p.Host) + } + return +} + +// Message represents an IRC protocol message. +// See RFC1459 section 2.3.1. +// +// <message> ::= [':' <prefix> <SPACE> ] <command> <params> <crlf> +// <prefix> ::= <servername> | <nick> [ '!' <user> ] [ '@' <host> ] +// <command> ::= <letter> { <letter> } | <number> <number> <number> +// <SPACE> ::= ' ' { ' ' } +// <params> ::= <SPACE> [ ':' <trailing> | <middle> <params> ] +// +// <middle> ::= <Any *non-empty* sequence of octets not including SPACE +// or NUL or CR or LF, the first of which may not be ':'> +// <trailing> ::= <Any, possibly *empty*, sequence of octets not including +// NUL or CR or LF> +// +// <crlf> ::= CR LF +type Message struct { + Tags + Prefix + Command string + Params []string +} + +// Param returns the i'th parameter. +// Returns the empty string if the requested parameter does not exist. +func (m *Message) Param(i int) string { + if i < 0 || i >= len(m.Params) { + return "" + } + return m.Params[i] +} + +// Trailing returns the last parameter. +// Returns the empty string if there are no parameters. +func (m *Message) Trailing() string { + if len(m.Params) > 0 { + return m.Params[len(m.Params)-1] + } + return "" +} + +// ParseMessage takes a string and attempts to create a Message struct. +// Returns nil if the Message is invalid. +func ParseMessage(raw string) (m *Message) { + // Ignore empty messages. + if raw = strings.TrimFunc(raw, cutsetFunc); len(raw) < 2 { + return nil + } + + i, j, k := 0, 0, 0 + + m = new(Message) + + if raw[k] == tags { + // Tags end with a space + k = indexByte(raw, space) + + // Tags must not be empty if the indicator is present + if k < 2 { + return nil + } + + m.Tags = ParseTags(raw[1:k]) + // Skip space at the end of the tags + k++ + } + + if raw[k] == prefix { + // Prefix ends with a space. + i = k + indexByte(raw[k:], space) + + // Prefix string must not be empty if the indicator is present. + if i < 2 { + return nil + } + + m.Prefix = ParsePrefix(raw[k+1 : i]) + + // Skip space at the end of the prefix + i++ + } else { + i = k + } + // Find end of command + j = i + indexByte(raw[i:], space) + + // Extract command + if j > i { + m.Command = strings.ToUpper(raw[i:j]) + } else { + m.Command = strings.ToUpper(raw[i:]) + + // We're done here! + return m + } + + // Find prefix for trailer. Note that because we need to match the trailing + // argument even if it's the only one, we can't skip the space until we've + // searched for it. + i = strings.Index(raw[j:], " :") + + // Skip the space + j++ + + if i < 0 { + + // There is no trailing argument! + m.Params = strings.Split(raw[j:], string(space)) + + // We're done here! + return m + } + + // Compensate for index on substring. Note that we skipped the space after + // looking for i, so we need to subtract 1 to account for that. + i = i + j - 1 + + // Check if we need to parse arguments. + if i > j { + m.Params = strings.Split(raw[j:i], string(space)) + } + + m.Params = append(m.Params, raw[i+2:]) + + return m +} + +// Len calculates the length of the string representation of this message. +func (m *Message) Len() (length int) { + if !m.Prefix.Empty() { + length = m.Prefix.Len() + 2 // Include prefix and trailing space + } + + length = length + len(m.Command) + + if len(m.Params) > 0 { + length = length + len(m.Params) + for _, param := range m.Params { + length = length + len(param) + } + + if trailing := m.Trailing(); len(trailing) < 1 || strings.Contains(trailing, " ") || trailing[0] == ':' { + // Add one for the colon in the trailing parameter + length++ + } + } + + return +} + +// Bytes returns a []byte representation of this message. +// +// As noted in rfc2812 section 2.3, messages should not exceed 512 characters +// in length. This method forces that limit by discarding any characters +// exceeding the length limit. +func (m *Message) Bytes() []byte { + buffer := new(bytes.Buffer) + + // Message tags + if m.Tags != nil { + buffer.WriteByte(tags) + m.Tags.writeTo(buffer) + buffer.WriteByte(space) + } + + // Message prefix + if !m.Prefix.Empty() { + buffer.WriteByte(prefix) + m.Prefix.writeTo(buffer) + buffer.WriteByte(space) + } + + // Command is required + buffer.WriteString(m.Command) + + // Space separated list of arguments + if len(m.Params) > 1 { + buffer.WriteByte(space) + buffer.WriteString(strings.Join(m.Params[:len(m.Params)-1], string(space))) + } + + if len(m.Params) > 0 { + buffer.WriteByte(space) + trailing := m.Trailing() + if len(trailing) < 1 || strings.Contains(trailing, " ") || trailing[0] == ':' { + buffer.WriteByte(prefix) + } + buffer.WriteString(trailing) + } + + // We need the limit the buffer length. + if buffer.Len() > (maxLength) { + buffer.Truncate(maxLength) + } + + return buffer.Bytes() +} + +// String returns a string representation of this message. +// +// As noted in rfc2812 section 2.3, messages should not exceed 512 characters +// in length. This method forces that limit by discarding any characters +// exceeding the length limit. +func (m *Message) String() string { + return string(m.Bytes()) +} diff --git a/hbot/message_test.go b/hbot/message_test.go new file mode 100644 index 0000000..77ee486 --- /dev/null +++ b/hbot/message_test.go @@ -0,0 +1,573 @@ +package hbot + +import ( + "fmt" + "reflect" + "testing" +) + +func ExampleParseMessage() { + message := ParseMessage("JOIN #help") + + fmt.Println(message.Params[0]) + + // Output: #help +} + +func ExampleMessage_String() { + message := &Message{ + Prefix: Prefix{ + Name: "sorcix", + User: "sorcix", + Host: "myhostname", + }, + Command: "PRIVMSG", + Params: []string{"This is an example!"}, + } + + fmt.Println(message.String()) + + // Output: :sorcix!sorcix@myhostname PRIVMSG :This is an example! +} + +var messageTests = [...]*struct { + parsed *Message + rawMessage string + rawPrefix string + hostmask bool // Is it very clear that the prefix is a hostname? + server bool // Is the prefix a servername? +}{ + { + parsed: &Message{ + Prefix: Prefix{ + Name: "syrk", + User: "kalt", + Host: "millennium.stealth.net", + }, + Command: "QUIT", + Params: []string{"Gone to have lunch"}, + }, + rawMessage: ":syrk!kalt@millennium.stealth.net QUIT :Gone to have lunch", + rawPrefix: "syrk!kalt@millennium.stealth.net", + hostmask: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "Trillian", + }, + Command: "SQUIT", + Params: []string{"cm22.eng.umd.edu", "Server out of control"}, + }, + rawMessage: ":Trillian SQUIT cm22.eng.umd.edu :Server out of control", + rawPrefix: "Trillian", + server: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "WiZ", + User: "jto", + Host: "tolsun.oulu.fi", + }, + Command: "JOIN", + Params: []string{"#Twilight_zone"}, + }, + rawMessage: ":WiZ!jto@tolsun.oulu.fi JOIN #Twilight_zone", + rawPrefix: "WiZ!jto@tolsun.oulu.fi", + hostmask: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "WiZ", + User: "jto", + Host: "tolsun.oulu.fi", + }, + Command: "PART", + Params: []string{"#playzone", "I lost"}, + }, + rawMessage: ":WiZ!jto@tolsun.oulu.fi PART #playzone :I lost", + rawPrefix: "WiZ!jto@tolsun.oulu.fi", + hostmask: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "WiZ", + User: "jto", + Host: "tolsun.oulu.fi", + }, + Command: "MODE", + Params: []string{"#eu-opers", "-l"}, + }, + rawMessage: ":WiZ!jto@tolsun.oulu.fi MODE #eu-opers -l", + rawPrefix: "WiZ!jto@tolsun.oulu.fi", + hostmask: true, + }, + { + parsed: &Message{ + Command: "MODE", + Params: []string{"&oulu", "+b", "*!*@*.edu", "+e", "*!*@*.bu.edu"}, + }, + rawMessage: "MODE &oulu +b *!*@*.edu +e *!*@*.bu.edu", + }, + { + parsed: &Message{ + Command: "PRIVMSG", + Params: []string{"#channel", "Message with :colons!"}, + }, + rawMessage: "PRIVMSG #channel :Message with :colons!", + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "irc.vives.lan", + }, + Command: "251", + Params: []string{"test", "There are 2 users and 0 services on 1 servers"}, + }, + rawMessage: ":irc.vives.lan 251 test :There are 2 users and 0 services on 1 servers", + rawPrefix: "irc.vives.lan", + server: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "irc.vives.lan", + }, + Command: "376", + Params: []string{"test", "End of MOTD command"}, + }, + rawMessage: ":irc.vives.lan 376 test :End of MOTD command", + rawPrefix: "irc.vives.lan", + server: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "irc.vives.lan", + }, + Command: "250", + Params: []string{"test", "Highest connection count: 1 (1 connections received)"}, + }, + rawMessage: ":irc.vives.lan 250 test :Highest connection count: 1 (1 connections received)", + rawPrefix: "irc.vives.lan", + server: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "sorcix", + User: "~sorcix", + Host: "sorcix.users.quakenet.org", + }, + Command: "PRIVMSG", + Params: []string{"#viveslan", "\001ACTION is testing CTCP messages!\001"}, + }, + rawMessage: ":sorcix!~sorcix@sorcix.users.quakenet.org PRIVMSG #viveslan :\001ACTION is testing CTCP messages!\001", + rawPrefix: "sorcix!~sorcix@sorcix.users.quakenet.org", + hostmask: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "sorcix", + User: "~sorcix", + Host: "sorcix.users.quakenet.org", + }, + Command: "NOTICE", + Params: []string{"midnightfox", "\001PONG 1234567890\001"}, + }, + rawMessage: ":sorcix!~sorcix@sorcix.users.quakenet.org NOTICE midnightfox :\001PONG 1234567890\001", + rawPrefix: "sorcix!~sorcix@sorcix.users.quakenet.org", + hostmask: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "a", + User: "b", + Host: "c", + }, + Command: "QUIT", + }, + rawMessage: ":a!b@c QUIT", + rawPrefix: "a!b@c", + hostmask: true, + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "a", + User: "b", + }, + Command: "PRIVMSG", + Params: []string{"message"}, + }, + rawMessage: ":a!b PRIVMSG message", + rawPrefix: "a!b", + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "a", + Host: "c", + }, + Command: "NOTICE", + Params: []string{":::Hey!"}, + }, + rawMessage: ":a@c NOTICE ::::Hey!", + rawPrefix: "a@c", + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "nick", + }, + Command: "PRIVMSG", + Params: []string{"$@", "This message contains a\ttab!"}, + }, + rawMessage: ":nick PRIVMSG $@ :This message contains a\ttab!", + rawPrefix: "nick", + }, + { + parsed: &Message{ + Command: "TEST", + Params: []string{"$@", "", "param", "Trailing"}, + }, + rawMessage: "TEST $@ param Trailing", + }, + { + rawMessage: ": PRIVMSG test :Invalid message with empty prefix.", + rawPrefix: "", + }, + { + rawMessage: ": PRIVMSG test :Invalid message with space prefix", + rawPrefix: " ", + }, + { + parsed: &Message{ + Command: "TOPIC", + Params: []string{"#foo", ""}, + }, + rawMessage: "TOPIC #foo :", + rawPrefix: "", + }, + { + parsed: &Message{ + Prefix: Prefix{ + Name: "name", + User: "user", + Host: "example.org", + }, + Command: "PRIVMSG", + Params: []string{"#test", "Message with spaces at the end! "}, + }, + rawMessage: ":name!user@example.org PRIVMSG #test :Message with spaces at the end! ", + rawPrefix: "name!user@example.org", + hostmask: true, + }, + { + parsed: &Message{ + Command: "PASS", + Params: []string{"oauth:token_goes_here"}, + }, + rawMessage: "PASS oauth:token_goes_here", + rawPrefix: "", + }, + { + parsed: &Message{ + Command: "PRIVMSG", + Params: []string{"#some:channel", "http://example.com"}, + }, + rawMessage: "PRIVMSG #some:channel http://example.com", + rawPrefix: "", + }, +} + +// ----- +// PREFIX +// ----- + +func TestPrefix_IsHostmask(t *testing.T) { + + for i, test := range messageTests { + + // Skip tests that have no prefix + if test.parsed == nil || test.parsed.Prefix.Empty() { + continue + } + + if test.hostmask && !test.parsed.Prefix.IsHostmask() { + t.Errorf("Prefix %d should be recognized as a hostmask!", i) + } + + } +} + +func TestPrefix_IsServer(t *testing.T) { + + for i, test := range messageTests { + + // Skip tests that have no prefix + if test.parsed == nil || test.parsed.Prefix.Empty() { + continue + } + + if test.server && !test.parsed.Prefix.IsServer() { + t.Errorf("Prefix %d should be recognized as a server!", i) + } + + } +} + +func TestPrefix_String(t *testing.T) { + var s string + + for i, test := range messageTests { + + // Skip tests that have no prefix + if test.parsed == nil || test.parsed.Prefix.Empty() { + continue + } + + // Convert the prefix + s = test.parsed.Prefix.String() + + // Result should be the same as the value in rawMessage. + if s != test.rawPrefix { + t.Errorf("Failed to stringify prefix %d:", i) + t.Logf("Output: %s", s) + t.Logf("Expected: %s", test.rawPrefix) + } + } +} + +func TestPrefix_Len(t *testing.T) { + var l int + + for i, test := range messageTests { + + // Skip tests that have no prefix + if test.parsed == nil || test.parsed.Prefix.Empty() { + continue + } + + l = test.parsed.Prefix.Len() + + // Result should be the same as the value in rawMessage. + if l != len(test.rawPrefix) { + t.Errorf("Failed to calculate prefix length %d:", i) + t.Logf("Output: %d", l) + t.Logf("Expected: %d", len(test.rawPrefix)) + } + } +} + +func TestParsePrefix(t *testing.T) { + for i, test := range messageTests { + + // Skip tests that have no prefix + if test.parsed == nil || test.parsed.Prefix.Empty() { + continue + } + + // Parse the prefix + p := ParsePrefix(test.rawPrefix) + + // Result struct should be the same as the value in parsed. + if p != test.parsed.Prefix { + t.Errorf("Failed to parse prefix %d:", i) + t.Logf("Output: %#v", p) + t.Logf("Expected: %#v", test.parsed.Prefix) + } + } +} + +// ----- +// MESSAGE +// ----- + +func TestMessage_String(t *testing.T) { + var s string + + for i, test := range messageTests { + + // Skip tests that have no valid struct + if test.parsed == nil { + continue + } + + // Convert the prefix + s = test.parsed.String() + + // Result should be the same as the value in rawMessage. + if s != test.rawMessage { + t.Errorf("Failed to stringify message %d:", i) + t.Logf("Output: %s", s) + t.Logf("Expected: %s", test.rawMessage) + } + } +} + +func TestMessage_Len(t *testing.T) { + var l int + + for i, test := range messageTests { + + // Skip tests that have no valid struct + if test.parsed == nil { + continue + } + + l = test.parsed.Len() + + // Result should be the same as the value in rawMessage. + if l != len(test.rawMessage) { + t.Errorf("Failed to calculate message length %d:", i) + t.Logf("Output: %d", l) + t.Logf("Expected: %d", len(test.rawMessage)) + } + } +} + +func TestMessage_Param(t *testing.T) { + msg := &Message{ + Params: []string{"foo", "bar", "baz"}, + } + + tests := [...]struct { + i int + value string + }{ + {i: 0, value: "foo"}, + {i: 2, value: "baz"}, + {i: 99, value: ""}, + {i: -1, value: ""}, + } + for i, test := range tests { + p := msg.Param(test.i) + if p != test.value { + t.Errorf("Failed to get parameter: %d", i) + t.Logf("Output: %s", p) + t.Logf("Expected: %s", test.value) + } + } +} + +func TestParseMessage(t *testing.T) { + var p *Message + + for i, test := range messageTests { + + // Parse the prefix + p = ParseMessage(test.rawMessage) + + // Result struct should be the same as the value in parsed. + if !reflect.DeepEqual(p, test.parsed) { + t.Errorf("Failed to parse message %d:", i) + t.Logf("Output: %#v", p) + t.Logf("Expected: %#v", test.parsed) + } + } +} + +// ----- +// MESSAGE DECODE -> ENCODE +// ----- + +func TestMessageDecodeEncode(t *testing.T) { + var ( + p *Message + s string + ) + + for i, test := range messageTests { + + // Skip invalid messages + if test.parsed == nil { + continue + } + + // Decode the message, then encode it again. + p = ParseMessage(test.rawMessage) + s = p.String() + + // Result struct should be the same as the original. + if s != test.rawMessage { + t.Errorf("Message %d failed decode-encode sequence!", i) + } + } +} + +// ----- +// BENCHMARK +// ----- + +func BenchmarkPrefix_String_short(b *testing.B) { + b.ReportAllocs() + + prefix := new(Prefix) + prefix.Name = "Namename" + + b.ResetTimer() + for i := 0; i < b.N; i++ { + _ = prefix.String() + } +} +func BenchmarkPrefix_String_long(b *testing.B) { + b.ReportAllocs() + + prefix := new(Prefix) + prefix.Name = "Namename" + prefix.User = "Username" + prefix.Host = "Hostname" + + b.ResetTimer() + for i := 0; i < b.N; i++ { + _ = prefix.String() + } +} +func BenchmarkParsePrefix_short(b *testing.B) { + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + ParsePrefix("Namename") + } +} +func BenchmarkParsePrefix_long(b *testing.B) { + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + ParsePrefix("Namename!Username@Hostname") + } +} +func BenchmarkMessage_String(b *testing.B) { + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + _ = messageTests[0].parsed.String() + } +} +func BenchmarkParseMessage_short(b *testing.B) { + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + ParseMessage("COMMAND arg1 :Message\r\n") + } +} +func BenchmarkParseMessage_medium(b *testing.B) { + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + ParseMessage(":Namename COMMAND arg6 arg7 :Message message message\r\n") + } +} +func BenchmarkParseMessage_long(b *testing.B) { + b.ReportAllocs() + + for i := 0; i < b.N; i++ { + ParseMessage(":Namename!username@hostname COMMAND arg1 arg2 arg3 arg4 arg5 arg6 arg7 :Message message message message message\r\n") + } +} |