hid: first round of mixed fixes and cleanups
This commit is contained in:
parent
f5def2e579
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2dfb4e45d1
GPG Key ID:
A0420B94F92B9493
454
hid/main.go
454
hid/main.go
@ -16,55 +16,101 @@
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// hid is a straight-forward port of kike IRCd from C.
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package main
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/*
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import (
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"bufio"
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"crypto/sha256"
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"crypto/tls"
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"encoding/hex"
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"flag"
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"fmt"
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"io"
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"log"
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"net"
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"os"
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"os/signal"
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"os/user"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"syscall"
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"time"
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)
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// ANSI terminal formatting, would be better if we had isatty() available
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func tf(text string, ansi string) string {
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return "\x1b[0;" + ansi + "m" + text + "\x1b[0m"
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}
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var debugMode = false
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func logErrorf(format string, args ...interface{}) {
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fmt.Fprintf(os.Stderr, tf("error: "+format+"\n", "1;31"), args...)
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}
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const (
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projectName = "hid"
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// TODO: Consider using the same version number for all subprojects.
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projectVersion = "0"
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)
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func logFatalf(format string, args ...interface{}) {
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fmt.Fprintf(os.Stderr, tf("fatal: "+format+"\n", "1;31"), args...)
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os.Exit(1)
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}
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// --- Utilities ---------------------------------------------------------------
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func logFatal(object interface{}) {
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logFatalf("%s", object)
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}
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func getHome() (home string) {
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if u, _ := user.Current(); u != nil {
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home = u.HomeDir
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} else {
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home = os.Getenv("HOME")
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// Split a string by a set of UTF-8 delimiters, optionally ignoring empty items.
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func splitString(s, delims string, ignoreEmpty bool) (result []string) {
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for {
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end := strings.IndexAny(s, delims)
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if end < 0 {
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break
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}
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if !ignoreEmpty || end != 0 {
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result = append(result, s[:end])
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}
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s = s[end+1:]
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}
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if !ignoreEmpty || s != "" {
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result = append(result, s)
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}
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return
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}
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// Only handling the simple case as that's what one mostly wants.
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// TODO(p): Handle the generic case as well.
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func expandTilde(path string) string {
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if strings.HasPrefix(path, "~/") {
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return getHome() + path[1:]
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func findTildeHome(username string) string {
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if username != "" {
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if u, _ := user.Lookup(username); u != nil {
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return u.HomeDir
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}
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return path
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} else if u, _ := user.Current(); u != nil {
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return u.HomeDir
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} else if v, ok := os.LookupEnv("HOME"); ok {
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return v
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}
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return "~" + username
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}
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func getXdgHomeDir(name, def string) string {
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// Tries to expand the tilde in paths, leaving it as-is on error.
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func expandTilde(path string) string {
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if path[0] != '~' {
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return path
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}
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var n int
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for n = 0; n < len(path); n++ {
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if path[n] == '/' {
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break
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}
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}
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return findTildeHome(path[1:n]) + path[n:]
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}
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func getXDGHomeDir(name, def string) string {
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env := os.Getenv(name)
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if env != "" && env[0] == '/' {
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return env
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}
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return filepath.Join(getHome(), def)
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home := ""
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if v, ok := os.LookupEnv("HOME"); ok {
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home = v
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} else if u, _ := user.Current(); u != nil {
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home = u.HomeDir
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}
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return filepath.Join(home, def)
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}
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// Retrieve all XDG base directories for configuration files
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func getXdgConfigDirs() (result []string) {
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home := getXdgHomeDir("XDG_CONFIG_HOME", ".config")
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// Retrieve all XDG base directories for configuration files.
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func getXDGConfigDirs() (result []string) {
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home := getXDGHomeDir("XDG_CONFIG_HOME", ".config")
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if home != "" {
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result = append(result, home)
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}
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@ -80,56 +126,6 @@ func getXdgConfigDirs() (result []string) {
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return
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}
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// Read a configuration file with the given basename w/o extension
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func readConfigFile(name string, output interface{}) error {
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var suffix = filepath.Join(projectName, name+".json")
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for _, path := range getXdgConfigDirs() {
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full := filepath.Join(path, suffix)
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file, err := os.Open(full)
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if err != nil {
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if !os.IsNotExist(err) {
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return err
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}
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continue
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}
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defer file.Close()
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decoder := json.NewDecoder(file)
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err = decoder.Decode(output)
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if err != nil {
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return fmt.Errorf("%s: %s", full, err)
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}
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return nil
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}
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return errors.New("configuration file not found")
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}
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*/
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import (
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"bufio"
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"crypto/sha256"
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"crypto/tls"
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"encoding/hex"
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"flag"
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"fmt"
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"io"
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"log"
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"net"
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"os"
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"os/signal"
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"path/filepath"
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"regexp"
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"strconv"
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"strings"
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"syscall"
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"time"
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)
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var debugMode = false
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// --- Utilities ---------------------------------------------------------------
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//
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// Trivial SSL/TLS autodetection. The first block of data returned by Recvfrom
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// must be at least three octets long for this to work reliably, but that should
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@ -173,6 +169,35 @@ var config = []struct {
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{"bind", []rune(":6667"), "Address of the IRC server"},
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}
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/*
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// Read a configuration file with the given basename w/o extension.
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func readConfigFile(name string, output interface{}) error {
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var suffix = filepath.Join(projectName, name+".json")
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for _, path := range getXDGConfigDirs() {
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full := filepath.Join(path, suffix)
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file, err := os.Open(full)
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if err != nil {
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if !os.IsNotExist(err) {
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return err
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}
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continue
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}
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defer file.Close()
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// TODO: We don't want to use JSON.
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decoder := json.NewDecoder(file)
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err = decoder.Decode(output)
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if err != nil {
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return fmt.Errorf("%s: %s", full, err)
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}
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return nil
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}
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return errors.New("configuration file not found")
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}
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*/
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// --- Rate limiter ------------------------------------------------------------
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type floodDetector struct {
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@ -231,21 +256,40 @@ func ircToLower(c byte) byte {
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return c
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}
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// TODO: To support ALL CAPS initialization of maps, perhaps we should use
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// ircToUpper instead.
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// FIXME: This doesn't follow the meaning of strxfrm and perhaps should be
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// renamed to ircNormalize.
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func ircStrxfrm(ident string) string {
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func ircToUpper(c byte) byte {
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switch c {
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case '{':
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return '['
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case '}':
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return ']'
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case '|':
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return '\\'
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case '^':
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return '~'
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}
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if c >= 'a' && c <= 'z' {
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return c - ('a' - 'A')
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}
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return c
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}
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// Convert identifier to a canonical form for case-insensitive comparisons.
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// ircToUpper is used so that statically initialized maps can be in uppercase.
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func ircToCanon(ident string) string {
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var canon []byte
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for _, c := range []byte(ident) {
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canon = append(canon, ircToLower(c))
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canon = append(canon, ircToUpper(c))
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}
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return string(canon)
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}
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func ircEqual(s1, s2 string) bool {
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return ircToCanon(s1) == ircToCanon(s2)
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}
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func ircFnmatch(pattern string, s string) bool {
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pattern, s = ircStrxfrm(pattern), ircStrxfrm(s)
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// FIXME: This should not support [] ranges and handle / specially.
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pattern, s = ircToCanon(pattern), ircToCanon(s)
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// FIXME: This should not support [] ranges and handle '/' specially.
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// We could translate the pattern to a regular expression.
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matched, _ := filepath.Match(pattern, s)
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return matched
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@ -331,8 +375,8 @@ type client struct {
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transport net.Conn // underlying connection
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tls *tls.Conn // TLS, if detected
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conn connCloseWrite // high-level connection
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inQ []byte // unprocessed input
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outQ []byte // unprocessed output
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recvQ []byte // unprocessed input
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sendQ []byte // unprocessed output
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reading bool // whether a reading goroutine is running
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writing bool // whether a writing goroutine is running
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closing bool // whether we're closing the connection
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@ -461,8 +505,6 @@ var (
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users map[string]*client // maps nicknames to clients
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channels map[string]*channel // maps channel names to data
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handlers map[string]bool // TODO message handlers
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capHandlers map[string]bool // TODO CAP message handlers
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whowas map[string]*whowasInfo // WHOWAS registry
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@ -484,35 +526,35 @@ var (
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tlsConf *tls.Config
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clients = make(map[*client]bool)
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listener net.Listener
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// TODO: quitting, quitTimer as they are named in kike?
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inShutdown bool
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shutdownTimer <-chan time.Time
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quitting bool
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quitTimer <-chan time.Time
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)
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// Forcefully tear down all connections.
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func forceShutdown(reason string) {
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if !inShutdown {
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log.Fatalln("forceShutdown called without initiateShutdown")
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func forceQuit(reason string) {
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if !quitting {
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log.Fatalln("forceQuit called without initiateQuit")
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}
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log.Printf("forced shutdown (%s)\n", reason)
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for c := range clients {
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c.destroy("TODO")
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// initiateQuit has already unregistered the client.
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c.kill("Shutting down")
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}
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}
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// Initiate a clean shutdown of the whole daemon.
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func initiateShutdown() {
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func initiateQuit() {
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log.Println("shutting down")
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if err := listener.Close(); err != nil {
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log.Println(err)
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}
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for c := range clients {
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c.closeLink("TODO")
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c.closeLink("Shutting down")
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}
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shutdownTimer = time.After(5 * time.Second)
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inShutdown = true
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quitTimer = time.After(5 * time.Second)
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quitting = true
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}
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// TODO: ircChannelCreate
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@ -538,32 +580,31 @@ func ircSendToRoommates(c *client, message string) {
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// --- Clients (continued) -----------------------------------------------------
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// TODO: Perhaps we should append to *[]byte for performance.
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func clientModeToString(m uint, mode *string) {
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func clientModeToString(m uint, mode *[]byte) {
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if 0 != m&ircUserModeInvisible {
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*mode += "i"
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*mode = append(*mode, 'i')
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}
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if 0 != m&ircUserModeRxWallops {
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*mode += "w"
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*mode = append(*mode, 'w')
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}
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if 0 != m&ircUserModeRestricted {
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*mode += "r"
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*mode = append(*mode, 'r')
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}
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if 0 != m&ircUserModeOperator {
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*mode += "o"
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*mode = append(*mode, 'o')
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}
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if 0 != m&ircUserModeRxServerNotices {
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*mode += "s"
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*mode = append(*mode, 's')
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}
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}
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func (c *client) getMode() string {
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mode := ""
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var mode []byte
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if c.awayMessage != "" {
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mode += "a"
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mode = append(mode, 'a')
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}
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clientModeToString(c.mode, &mode)
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return mode
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return string(mode)
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}
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func (c *client) send(line string) {
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@ -571,14 +612,13 @@ func (c *client) send(line string) {
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return
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}
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// TODO: Rename inQ and outQ to recvQ and sendQ as they are usually named.
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oldOutQ := len(c.outQ)
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oldSendQLen := len(c.sendQ)
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// So far there's only one message tag we use, so we can do it simple;
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// note that a 1024-character limit applies to messages with tags on.
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if 0 != c.capsEnabled&ircCapServerTime {
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c.outQ = time.Now().UTC().
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AppendFormat(c.outQ, "@time=2006-01-02T15:04:05.000Z ")
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c.sendQ = time.Now().UTC().
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AppendFormat(c.sendQ, "@time=2006-01-02T15:04:05.000Z ")
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}
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bytes := []byte(line)
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@ -587,13 +627,13 @@ func (c *client) send(line string) {
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}
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// TODO: Kill the connection above some "SendQ" threshold (careful!)
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c.outQ = append(c.outQ, bytes...)
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c.outQ = append(c.outQ, "\r\n"...)
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c.flushOutQ()
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c.sendQ = append(c.sendQ, bytes...)
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c.sendQ = append(c.sendQ, "\r\n"...)
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c.flushSendQ()
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// Technically we haven't sent it yet but that's a minor detail
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c.nSentMessages++
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c.sentBytes += len(c.outQ) - oldOutQ
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c.sentBytes += len(c.sendQ) - oldSendQLen
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}
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func (c *client) sendf(format string, a ...interface{}) {
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@ -604,7 +644,14 @@ func (c *client) addToWhowas() {
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// Only keeping one entry for each nickname.
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// TODO: Make sure this list doesn't get too long, for example by
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// putting them in a linked list ordered by time.
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whowas[ircStrxfrm(c.nickname)] = newWhowasInfo(c)
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whowas[ircToCanon(c.nickname)] = newWhowasInfo(c)
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}
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func (c *client) nicknameOrStar() string {
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if c.nickname == "" {
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return "*"
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}
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return c.nickname
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}
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func (c *client) unregister(reason string) {
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@ -622,14 +669,13 @@ func (c *client) unregister(reason string) {
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}
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c.addToWhowas()
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delete(users, ircStrxfrm(c.nickname))
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delete(users, ircToCanon(c.nickname))
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c.nickname = ""
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c.registered = false
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}
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// TODO: Rename to kill.
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// Close the connection and forget about the client.
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func (c *client) destroy(reason string) {
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func (c *client) kill(reason string) {
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if reason == "" {
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reason = "Client exited"
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}
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@ -661,25 +707,20 @@ func (c *client) closeLink(reason string) {
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// We also want to avoid accidentally writing to the socket before
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// address resolution has finished.
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if c.conn == nil {
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c.destroy(reason)
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c.kill(reason)
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return
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}
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if c.closing {
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return
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}
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nickname := c.nickname
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if nickname == "" {
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nickname = "*"
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}
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// We push an "ERROR" message to the write buffer and let the writer send
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// it, with some arbitrary timeout. The "closing" state makes sure
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// that a/ we ignore any successive messages, and b/ that the connection
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// is killed after the write buffer is transferred and emptied.
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// (Since we send this message, we don't need to call CloseWrite here.)
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c.sendf("ERROR :Closing link: %s[%s] (%s)",
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nickname, c.hostname /* TODO host IP? */, reason)
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c.nicknameOrStar(), c.hostname /* TODO host IP? */, reason)
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c.closing = true
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c.unregister(reason)
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@ -720,12 +761,7 @@ func (c *client) getTLSCertFingerprint() string {
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// XXX: ap doesn't really need to be a slice.
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func (c *client) makeReply(id int, ap []interface{}) string {
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nickname := c.nickname
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if nickname == "" {
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nickname = "*"
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}
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s := fmt.Sprintf(":%s %03d %s ", serverName, id, nickname)
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s := fmt.Sprintf(":%s %03d %s ", serverName, id, c.nicknameOrStar())
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a := fmt.Sprintf(defaultReplies[id], ap...)
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return s + a
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}
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@ -809,7 +845,7 @@ func isThisMe(target string) bool {
|
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if ircFnmatch(target, serverName) {
|
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return true
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}
|
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_, ok := users[ircStrxfrm(target)]
|
||||
_, ok := users[ircToCanon(target)]
|
||||
return ok
|
||||
}
|
||||
|
||||
@ -821,21 +857,20 @@ func (c *client) sendISUPPORT() {
|
||||
}
|
||||
|
||||
func (c *client) tryFinishRegistration() {
|
||||
// TODO: Check if the realname is really required.
|
||||
if c.nickname == "" || c.username == "" || c.realname == "" {
|
||||
if c.registered || c.capNegotiating {
|
||||
return
|
||||
}
|
||||
if c.registered || c.capNegotiating {
|
||||
if c.nickname == "" || c.username == "" {
|
||||
return
|
||||
}
|
||||
|
||||
c.registered = true
|
||||
c.sendReply(RPL_WELCOME, c.nickname, c.username, c.hostname)
|
||||
|
||||
c.sendReply(RPL_YOURHOST, serverName, "TODO version")
|
||||
c.sendReply(RPL_YOURHOST, serverName, projectVersion)
|
||||
// The purpose of this message eludes me.
|
||||
c.sendReply(RPL_CREATED, time.Unix(started, 0).Format("Mon, 02 Jan 2006"))
|
||||
c.sendReply(RPL_MYINFO, serverName, "TODO version",
|
||||
c.sendReply(RPL_MYINFO, serverName, projectVersion,
|
||||
ircSupportedUserModes, ircSupportedChanModes)
|
||||
|
||||
c.sendISUPPORT()
|
||||
@ -852,7 +887,7 @@ func (c *client) tryFinishRegistration() {
|
||||
serverName, c.nickname, c.tlsCertFingerprint)
|
||||
}
|
||||
|
||||
delete(whowas, ircStrxfrm(c.nickname))
|
||||
delete(whowas, ircToCanon(c.nickname))
|
||||
}
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
@ -957,8 +992,6 @@ func (c *client) handleCAPEND(a *ircCapArgs) {
|
||||
|
||||
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
||||
|
||||
// TODO: Beware of case sensitivity, probably need to index it by ircStrxfrm,
|
||||
// which should arguably be named ircToLower and ircToUpper or something.
|
||||
var ircCapHandlers = map[string]func(*client, *ircCapArgs){
|
||||
"LS": (*client).handleCAPLS,
|
||||
"LIST": (*client).handleCAPLIST,
|
||||
@ -976,14 +1009,8 @@ func ircHandleCAP(msg *message, c *client) {
|
||||
return
|
||||
}
|
||||
|
||||
// TODO: This really does seem to warrant a method.
|
||||
nickname := c.nickname
|
||||
if nickname == "" {
|
||||
nickname = "*"
|
||||
}
|
||||
|
||||
args := &ircCapArgs{
|
||||
target: nickname,
|
||||
target: c.nicknameOrStar(),
|
||||
subcommand: msg.params[0],
|
||||
fullParams: "",
|
||||
params: []string{},
|
||||
@ -991,12 +1018,10 @@ func ircHandleCAP(msg *message, c *client) {
|
||||
|
||||
if len(msg.params) > 1 {
|
||||
args.fullParams = msg.params[1]
|
||||
// TODO: ignore_empty, likely create SplitSkipEmpty
|
||||
args.params = strings.Split(args.fullParams, " ")
|
||||
args.params = splitString(args.fullParams, " ", true)
|
||||
}
|
||||
|
||||
// FIXME: We should ASCII ToUpper the subcommand.
|
||||
if fn, ok := ircCapHandlers[ircStrxfrm(args.subcommand)]; !ok {
|
||||
if fn, ok := ircCapHandlers[ircToCanon(args.subcommand)]; !ok {
|
||||
c.sendReply(ERR_INVALIDCAPCMD, args.subcommand,
|
||||
"Invalid CAP subcommand")
|
||||
} else {
|
||||
@ -1026,8 +1051,8 @@ func ircHandleNICK(msg *message, c *client) {
|
||||
return
|
||||
}
|
||||
|
||||
nicknameNormalized := ircStrxfrm(nickname)
|
||||
if client, ok := users[nicknameNormalized]; ok && client != c {
|
||||
nicknameCanon := ircToCanon(nickname)
|
||||
if client, ok := users[nicknameCanon]; ok && client != c {
|
||||
c.sendReply(ERR_NICKNAMEINUSE, nickname)
|
||||
return
|
||||
}
|
||||
@ -1043,11 +1068,11 @@ func ircHandleNICK(msg *message, c *client) {
|
||||
|
||||
// Release the old nickname and allocate a new one.
|
||||
if c.nickname != "" {
|
||||
delete(users, ircStrxfrm(c.nickname))
|
||||
delete(users, ircToCanon(c.nickname))
|
||||
}
|
||||
|
||||
c.nickname = nickname
|
||||
users[nicknameNormalized] = c
|
||||
users[nicknameCanon] = c
|
||||
|
||||
c.tryFinishRegistration()
|
||||
}
|
||||
@ -1064,7 +1089,7 @@ func ircHandleUSER(msg *message, c *client) {
|
||||
|
||||
username, mode, realname := msg.params[0], msg.params[1], msg.params[3]
|
||||
|
||||
// Unfortunately the protocol doesn't give us any means of rejecting it
|
||||
// Unfortunately, the protocol doesn't give us any means of rejecting it.
|
||||
if !ircIsValidUsername(username) {
|
||||
username = "*"
|
||||
}
|
||||
@ -1091,7 +1116,30 @@ func ircHandleUSERHOST(msg *message, c *client) {
|
||||
return
|
||||
}
|
||||
|
||||
// TODO
|
||||
var reply []byte
|
||||
for i := 0; i < 5 && i < len(msg.params); i++ {
|
||||
nick := msg.params[i]
|
||||
target := users[ircToCanon(nick)]
|
||||
if target == nil {
|
||||
continue
|
||||
}
|
||||
if i != 0 {
|
||||
reply = append(reply, ' ')
|
||||
}
|
||||
|
||||
reply = append(reply, nick...)
|
||||
if 0 != target.mode&ircUserModeOperator {
|
||||
reply = append(reply, '*')
|
||||
}
|
||||
|
||||
if target.awayMessage != "" {
|
||||
reply = append(reply, "=-"...)
|
||||
} else {
|
||||
reply = append(reply, "=+"...)
|
||||
}
|
||||
reply = append(reply, (target.username + "@" + target.hostname)...)
|
||||
}
|
||||
c.sendReply(RPL_USERHOST, string(reply))
|
||||
}
|
||||
|
||||
func ircHandleLUSERS(msg *message, c *client) {
|
||||
@ -1162,8 +1210,8 @@ func ircHandleVERSION(msg *message, c *client) {
|
||||
postVersion = 1
|
||||
}
|
||||
|
||||
c.sendReply(RPL_VERSION, "TODO version", postVersion, serverName,
|
||||
"TODO program name"+" "+"TODO version")
|
||||
c.sendReply(RPL_VERSION, projectVersion, postVersion, serverName,
|
||||
projectName+" "+projectVersion)
|
||||
c.sendISUPPORT()
|
||||
}
|
||||
|
||||
@ -1199,13 +1247,13 @@ func ircHandleMODE(msg *message, c *client) {
|
||||
|
||||
// TODO
|
||||
target := msg.params[0]
|
||||
client := users[ircStrxfrm(target)]
|
||||
ch := users[ircStrxfrm(target)]
|
||||
client := users[ircToCanon(target)]
|
||||
ch := users[ircToCanon(target)]
|
||||
|
||||
if client != nil {
|
||||
// TODO: Think about strcmp.
|
||||
//if ircStrcmp(target, c.nickname) != 0 {
|
||||
//}
|
||||
// TODO
|
||||
if ircEqual(target, c.nickname) {
|
||||
}
|
||||
} else if ch != nil {
|
||||
// TODO
|
||||
}
|
||||
@ -1223,11 +1271,11 @@ func ircHandleUserMessage(msg *message, c *client,
|
||||
}
|
||||
|
||||
target, text := msg.params[0], msg.params[1]
|
||||
if client, ok := users[ircStrxfrm(target)]; ok {
|
||||
if client, ok := users[ircToCanon(target)]; ok {
|
||||
// TODO
|
||||
_ = client
|
||||
_ = text
|
||||
} else if ch, ok := channels[ircStrxfrm(target)]; ok {
|
||||
} else if ch, ok := channels[ircToCanon(target)]; ok {
|
||||
// TODO
|
||||
_ = ch
|
||||
} else {
|
||||
@ -1254,7 +1302,7 @@ func (c *client) onPrepared(host string, isTLS bool) {
|
||||
c.hostname = host
|
||||
c.address = net.JoinHostPort(host, c.port)
|
||||
|
||||
// TODO: If we've tried to send any data before now, we need to flushOutQ.
|
||||
// TODO: If we've tried to send any data before now, we need to flushSendQ.
|
||||
go read(c)
|
||||
c.reading = true
|
||||
}
|
||||
@ -1266,16 +1314,16 @@ func (c *client) onRead(data []byte, readErr error) {
|
||||
return
|
||||
}
|
||||
|
||||
c.inQ = append(c.inQ, data...)
|
||||
c.recvQ = append(c.recvQ, data...)
|
||||
for {
|
||||
// XXX: This accepts even simple LF newlines, even though they're not
|
||||
// really allowed by the protocol.
|
||||
advance, token, _ := bufio.ScanLines(c.inQ, false /* atEOF */)
|
||||
advance, token, _ := bufio.ScanLines(c.recvQ, false /* atEOF */)
|
||||
if advance == 0 {
|
||||
break
|
||||
}
|
||||
|
||||
c.inQ = c.inQ[advance:]
|
||||
c.recvQ = c.recvQ[advance:]
|
||||
line := string(token)
|
||||
log.Printf("-> %s\n", line)
|
||||
|
||||
@ -1298,18 +1346,18 @@ func (c *client) onRead(data []byte, readErr error) {
|
||||
|
||||
if readErr != io.EOF {
|
||||
log.Println(readErr)
|
||||
c.destroy("TODO")
|
||||
c.kill(readErr.Error())
|
||||
} else if c.closing {
|
||||
// Disregarding whether a clean shutdown has happened or not.
|
||||
log.Println("client finished shutdown")
|
||||
c.destroy("TODO")
|
||||
c.kill("TODO")
|
||||
} else {
|
||||
log.Println("client EOF")
|
||||
c.closeLink("")
|
||||
}
|
||||
} else if len(c.inQ) > 8192 {
|
||||
log.Println("client inQ overrun")
|
||||
c.closeLink("inQ overrun")
|
||||
} else if len(c.recvQ) > 8192 {
|
||||
log.Println("client recvQ overrun")
|
||||
c.closeLink("recvQ overrun")
|
||||
|
||||
// tls.Conn doesn't have the CloseRead method (and it needs to be able
|
||||
// to read from the TCP connection even for writes, so there isn't much
|
||||
@ -1319,29 +1367,29 @@ func (c *client) onRead(data []byte, readErr error) {
|
||||
}
|
||||
}
|
||||
|
||||
// Spawn a goroutine to flush the outQ if possible and necessary.
|
||||
func (c *client) flushOutQ() {
|
||||
// Spawn a goroutine to flush the sendQ if possible and necessary.
|
||||
func (c *client) flushSendQ() {
|
||||
if !c.writing && c.conn != nil {
|
||||
go write(c, c.outQ)
|
||||
go write(c, c.sendQ)
|
||||
c.writing = true
|
||||
}
|
||||
}
|
||||
|
||||
// Handle the results from trying to write to the client connection.
|
||||
func (c *client) onWrite(written int, writeErr error) {
|
||||
c.outQ = c.outQ[written:]
|
||||
c.sendQ = c.sendQ[written:]
|
||||
c.writing = false
|
||||
|
||||
if writeErr != nil {
|
||||
log.Println(writeErr)
|
||||
c.destroy("TODO")
|
||||
} else if len(c.outQ) > 0 {
|
||||
c.flushOutQ()
|
||||
c.kill(writeErr.Error())
|
||||
} else if len(c.sendQ) > 0 {
|
||||
c.flushSendQ()
|
||||
} else if c.closing {
|
||||
if c.reading {
|
||||
c.conn.CloseWrite()
|
||||
} else {
|
||||
c.destroy("TODO")
|
||||
c.kill("TODO")
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1419,7 +1467,7 @@ func read(client *client) {
|
||||
}
|
||||
}
|
||||
|
||||
// Flush outQ, which is passed by parameter so that there are no data races.
|
||||
// Flush sendQ, which is passed by parameter so that there are no data races.
|
||||
func write(client *client, data []byte) {
|
||||
// We just write as much as we can, the main goroutine does the looping.
|
||||
n, err := client.conn.Write(data)
|
||||
@ -1431,14 +1479,14 @@ func write(client *client, data []byte) {
|
||||
func processOneEvent() {
|
||||
select {
|
||||
case <-sigs:
|
||||
if inShutdown {
|
||||
forceShutdown("requested by user")
|
||||
if quitting {
|
||||
forceQuit("requested by user")
|
||||
} else {
|
||||
initiateShutdown()
|
||||
initiateQuit()
|
||||
}
|
||||
|
||||
case <-shutdownTimer:
|
||||
forceShutdown("timeout")
|
||||
case <-quitTimer:
|
||||
forceQuit("timeout")
|
||||
|
||||
case conn := <-conns:
|
||||
log.Println("accepted client connection")
|
||||
@ -1480,7 +1528,7 @@ func processOneEvent() {
|
||||
case c := <-timeouts:
|
||||
if _, ok := clients[c]; ok {
|
||||
log.Println("client timeouted")
|
||||
c.destroy("TODO")
|
||||
c.kill("TODO")
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1490,14 +1538,12 @@ func main() {
|
||||
version := flag.Bool("version", false, "show version and exit")
|
||||
flag.Parse()
|
||||
|
||||
// TODO: Consider using the same version number for all subprojects.
|
||||
if *version {
|
||||
fmt.Printf("%s %s\n", "hid", "0")
|
||||
fmt.Printf("%s %s\n", projectName, projectVersion)
|
||||
return
|
||||
}
|
||||
|
||||
// TODO: Configuration--create an INI parser, probably;
|
||||
// lift XDG_CONFIG_HOME from gitlab-notifier.
|
||||
// TODO: Configuration--create an INI parser, probably.
|
||||
if len(flag.Args()) != 3 {
|
||||
log.Fatalf("usage: %s KEY CERT ADDRESS\n", os.Args[0])
|
||||
}
|
||||
@ -1520,7 +1566,7 @@ func main() {
|
||||
go accept(listener)
|
||||
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
|
||||
|
||||
for !inShutdown || len(clients) > 0 {
|
||||
for !quitting || len(clients) > 0 {
|
||||
processOneEvent()
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user