mirror of
https://github.com/mjl-/mox.git
synced 2024-12-26 08:23:48 +03:00
686 lines
16 KiB
Go
686 lines
16 KiB
Go
package main
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import (
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"bufio"
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"context"
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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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"path/filepath"
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"runtime/debug"
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"sort"
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"strconv"
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"strings"
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"time"
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"github.com/mjl-/bstore"
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"github.com/mjl-/mox/dns"
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"github.com/mjl-/mox/message"
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"github.com/mjl-/mox/metrics"
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"github.com/mjl-/mox/mlog"
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"github.com/mjl-/mox/mox-"
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"github.com/mjl-/mox/queue"
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"github.com/mjl-/mox/smtp"
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"github.com/mjl-/mox/store"
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)
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// ctl represents a connection to the ctl unix domain socket of a running mox instance.
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// ctl provides functions to read/write commands/responses/data streams.
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type ctl struct {
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cmd string // Set for server-side of commands.
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conn net.Conn
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r *bufio.Reader // Set for first reader.
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x any // If set, errors are handled by calling panic(x) instead of log.Fatal.
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log *mlog.Log // If set, along with x, logging is done here.
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}
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// xctl opens a ctl connection.
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func xctl() *ctl {
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p := mox.DataDirPath("ctl")
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conn, err := net.Dial("unix", p)
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if err != nil {
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log.Fatalf("connecting to control socket at %q: %v", p, err)
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}
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ctl := &ctl{conn: conn}
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version := ctl.xread()
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if version != "ctlv0" {
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log.Fatalf("ctl protocol mismatch, got %q, expected ctlv0", version)
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}
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return ctl
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}
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// Interpret msg as an error.
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// If ctl.x is set, the string is also written to the ctl to be interpreted as error by the other party.
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func (c *ctl) xerror(msg string) {
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if c.x == nil {
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log.Fatalln(msg)
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}
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c.log.Debugx("ctl error", fmt.Errorf("%s", msg), mlog.Field("cmd", c.cmd))
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c.xwrite(msg)
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panic(c.x)
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}
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// Check if err is not nil. If so, handle error through ctl.x or log.Fatal. If
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// ctl.x is set, the error string is written to ctl, to be interpreted as an error
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// by the command reading from ctl.
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func (c *ctl) xcheck(err error, msg string) {
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if err == nil {
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return
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}
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if c.x == nil {
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log.Fatalf("%s: %s", msg, err)
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}
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c.log.Debugx(msg, err, mlog.Field("cmd", c.cmd))
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fmt.Fprintf(c.conn, "%s: %s\n", msg, err)
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panic(c.x)
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}
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// Read a line and return it without trailing newline.
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func (c *ctl) xread() string {
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if c.r == nil {
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c.r = bufio.NewReader(c.conn)
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}
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line, err := c.r.ReadString('\n')
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c.xcheck(err, "read from ctl")
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return strings.TrimSuffix(line, "\n")
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}
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// Read a line. If not "ok", the string is interpreted as an error.
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func (c *ctl) xreadok() {
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line := c.xread()
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if line != "ok" {
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c.xerror(line)
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}
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}
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// Write a string, typically a command or parameter.
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func (c *ctl) xwrite(text string) {
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_, err := fmt.Fprintln(c.conn, text)
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c.xcheck(err, "write")
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}
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// Write "ok" to indicate success.
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func (c *ctl) xwriteok() {
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c.xwrite("ok")
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}
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// Copy data from a stream from ctl to dst.
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func (c *ctl) xstreamto(dst io.Writer) {
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_, err := io.Copy(dst, c.reader())
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c.xcheck(err, "reading message")
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}
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// Copy data from src to a stream to ctl.
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func (c *ctl) xstreamfrom(src io.Reader) {
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w := c.writer()
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_, err := io.Copy(w, src)
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c.xcheck(err, "copying")
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w.xclose()
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}
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// Writer returns an io.Writer for a data stream to ctl.
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// When done writing, caller must call xclose to signal the end of the stream.
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// Behaviour of "x" is copied from ctl.
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func (c *ctl) writer() *ctlwriter {
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return &ctlwriter{cmd: c.cmd, conn: c.conn, x: c.x, log: c.log}
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}
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// Reader returns an io.Reader for a data stream from ctl.
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// Behaviour of "x" is copied from ctl.
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func (c *ctl) reader() *ctlreader {
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if c.r == nil {
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c.r = bufio.NewReader(c.conn)
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}
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return &ctlreader{cmd: c.cmd, conn: c.conn, r: c.r, x: c.x, log: c.log}
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}
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/*
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Ctlwriter and ctlreader implement the writing and reading a data stream. They
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implement the io.Writer and io.Reader interface. In the protocol below each
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non-data message ends with a newline that is typically stripped when
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interpreting.
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Zero or more data transactions:
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> "123" (for data size) or an error message
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> data, 123 bytes
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< "ok" or an error message
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Followed by a end of stream indicated by zero data bytes message:
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> "0"
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*/
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type ctlwriter struct {
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cmd string // Set for server-side of commands.
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conn net.Conn // Ctl socket from which messages are read.
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buf []byte // Scratch buffer, for reading response.
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x any // If not nil, errors in Write and xcheckf are handled with panic(x), otherwise with a log.Fatal.
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log *mlog.Log
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}
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func (s *ctlwriter) Write(buf []byte) (int, error) {
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_, err := fmt.Fprintf(s.conn, "%d\n", len(buf))
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s.xcheck(err, "write count")
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_, err = s.conn.Write(buf)
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s.xcheck(err, "write data")
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if s.buf == nil {
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s.buf = make([]byte, 512)
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}
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n, err := s.conn.Read(s.buf)
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s.xcheck(err, "reading response to write")
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line := strings.TrimSuffix(string(s.buf[:n]), "\n")
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if line != "ok" {
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s.xerror(line)
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}
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return len(buf), nil
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}
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func (s *ctlwriter) xerror(msg string) {
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if s.x == nil {
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log.Fatalln(msg)
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} else {
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s.log.Debugx("error", fmt.Errorf("%s", msg), mlog.Field("cmd", s.cmd))
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panic(s.x)
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}
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}
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func (s *ctlwriter) xcheck(err error, msg string) {
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if err == nil {
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return
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}
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if s.x == nil {
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log.Fatalf("%s: %s", msg, err)
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} else {
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s.log.Debugx(msg, err, mlog.Field("cmd", s.cmd))
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panic(s.x)
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}
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}
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func (s *ctlwriter) xclose() {
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_, err := fmt.Fprintf(s.conn, "0\n")
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s.xcheck(err, "write eof")
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}
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type ctlreader struct {
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cmd string // Set for server-side of command.
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conn net.Conn // For writing "ok" after reading.
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r *bufio.Reader // Buffered ctl socket.
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err error // If set, returned for each read. can also be io.EOF.
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npending int // Number of bytes that can still be read until a new count line must be read.
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x any // If set, errors are handled with panic(x) instead of log.Fatal.
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log *mlog.Log // If x is set, logging goes to log.
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}
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func (s *ctlreader) Read(buf []byte) (N int, Err error) {
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if s.err != nil {
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return 0, s.err
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}
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if s.npending == 0 {
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line, err := s.r.ReadString('\n')
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s.xcheck(err, "reading count")
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line = strings.TrimSuffix(line, "\n")
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n, err := strconv.ParseInt(line, 10, 32)
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if err != nil {
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s.xerror(line)
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}
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if n == 0 {
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s.err = io.EOF
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return 0, s.err
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}
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s.npending = int(n)
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}
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rn := len(buf)
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if rn > s.npending {
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rn = s.npending
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}
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n, err := s.r.Read(buf[:rn])
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s.xcheck(err, "read from ctl")
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s.npending -= n
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if s.npending == 0 {
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_, err = fmt.Fprintln(s.conn, "ok")
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s.xcheck(err, "writing ok after reading")
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}
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return n, err
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}
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func (s *ctlreader) xerror(msg string) {
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if s.x == nil {
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log.Fatalln(msg)
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} else {
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s.log.Debugx("error", fmt.Errorf("%s", msg), mlog.Field("cmd", s.cmd))
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panic(s.x)
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}
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}
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func (s *ctlreader) xcheck(err error, msg string) {
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if err == nil {
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return
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}
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if s.x == nil {
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log.Fatalf("%s: %s", msg, err)
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} else {
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s.log.Debugx(msg, err, mlog.Field("cmd", s.cmd))
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panic(s.x)
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}
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}
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// servectl handles requests on the unix domain socket "ctl", e.g. for graceful shutdown, local mail delivery.
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func servectl(ctx context.Context, log *mlog.Log, conn net.Conn, shutdown func()) {
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log.Debug("ctl connection")
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var stop = struct{}{} // Sentinel value for panic and recover.
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ctl := &ctl{conn: conn, x: stop, log: log}
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defer func() {
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x := recover()
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if x == nil || x == stop {
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return
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}
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log.Error("servectl panic", mlog.Field("err", x), mlog.Field("cmd", ctl.cmd))
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debug.PrintStack()
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metrics.PanicInc("ctl")
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}()
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defer conn.Close()
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ctl.xwrite("ctlv0")
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for {
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servectlcmd(ctx, ctl, shutdown)
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}
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}
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func servectlcmd(ctx context.Context, ctl *ctl, shutdown func()) {
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log := ctl.log
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cmd := ctl.xread()
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ctl.cmd = cmd
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log.Info("ctl command", mlog.Field("cmd", cmd))
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switch cmd {
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case "stop":
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shutdown()
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os.Exit(0)
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case "deliver":
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/* The protocol, double quoted are literals.
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> "deliver"
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> address
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< "ok"
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> stream
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< "ok"
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*/
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to := ctl.xread()
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a, addr, err := store.OpenEmail(to)
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ctl.xcheck(err, "lookup destination address")
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msgFile, err := store.CreateMessageTemp("ctl-deliver")
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ctl.xcheck(err, "creating temporary message file")
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defer func() {
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if msgFile != nil {
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err := os.Remove(msgFile.Name())
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log.Check(err, "removing temporary message file", mlog.Field("path", msgFile.Name()))
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err = msgFile.Close()
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log.Check(err, "closing temporary message file")
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}
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}()
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mw := &message.Writer{Writer: msgFile}
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ctl.xwriteok()
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ctl.xstreamto(mw)
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err = msgFile.Sync()
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ctl.xcheck(err, "syncing message to storage")
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msgPrefix := []byte{}
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if !mw.HaveHeaders {
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msgPrefix = []byte("\r\n\r\n")
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}
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m := &store.Message{
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Received: time.Now(),
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Size: int64(len(msgPrefix)) + mw.Size,
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MsgPrefix: msgPrefix,
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}
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a.WithWLock(func() {
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err := a.Deliver(log, addr, m, msgFile, true)
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ctl.xcheck(err, "delivering message")
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log.Info("message delivered through ctl", mlog.Field("to", to))
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})
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err = msgFile.Close()
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log.Check(err, "closing delivered message file")
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msgFile = nil
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err = a.Close()
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ctl.xcheck(err, "closing account")
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ctl.xwriteok()
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case "setaccountpassword":
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/* protocol:
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> "setaccountpassword"
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> address
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> password
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< "ok" or error
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*/
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addr := ctl.xread()
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pw := ctl.xread()
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acc, _, err := store.OpenEmail(addr)
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ctl.xcheck(err, "open account")
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defer func() {
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if acc != nil {
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err := acc.Close()
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log.Check(err, "closing account after setting password")
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}
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}()
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err = acc.SetPassword(pw)
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ctl.xcheck(err, "setting password")
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err = acc.Close()
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ctl.xcheck(err, "closing account")
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acc = nil
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ctl.xwriteok()
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case "queue":
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/* protocol:
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> "queue"
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< "ok"
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< stream
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*/
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qmsgs, err := queue.List(ctx)
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ctl.xcheck(err, "listing queue")
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ctl.xwriteok()
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xw := ctl.writer()
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fmt.Fprintln(xw, "queue:")
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for _, qm := range qmsgs {
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var lastAttempt string
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if qm.LastAttempt != nil {
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lastAttempt = time.Since(*qm.LastAttempt).Round(time.Second).String()
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}
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fmt.Fprintf(xw, "%5d %s from:%s to:%s next %s last %s error %q\n", qm.ID, qm.Queued.Format(time.RFC3339), qm.Sender().LogString(), qm.Recipient().LogString(), -time.Since(qm.NextAttempt).Round(time.Second), lastAttempt, qm.LastError)
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}
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if len(qmsgs) == 0 {
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fmt.Fprint(xw, "(empty)\n")
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}
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xw.xclose()
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case "queuekick":
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/* protocol:
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> "queuekick"
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> id
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> todomain
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> recipient
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> transport // if empty, transport is left unchanged; in future, we may want to differtiate between "leave unchanged" and "set to empty string".
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< count
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< "ok" or error
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*/
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idstr := ctl.xread()
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todomain := ctl.xread()
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recipient := ctl.xread()
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transport := ctl.xread()
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id, err := strconv.ParseInt(idstr, 10, 64)
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if err != nil {
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ctl.xwrite("0")
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ctl.xcheck(err, "parsing id")
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}
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var xtransport *string
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if transport != "" {
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xtransport = &transport
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}
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count, err := queue.Kick(ctx, id, todomain, recipient, xtransport)
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ctl.xcheck(err, "kicking queue")
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ctl.xwrite(fmt.Sprintf("%d", count))
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ctl.xwriteok()
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case "queuedrop":
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/* protocol:
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> "queuedrop"
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> id
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> todomain
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> recipient
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< count
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< "ok" or error
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*/
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idstr := ctl.xread()
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todomain := ctl.xread()
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recipient := ctl.xread()
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id, err := strconv.ParseInt(idstr, 10, 64)
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if err != nil {
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ctl.xwrite("0")
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ctl.xcheck(err, "parsing id")
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}
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count, err := queue.Drop(ctx, id, todomain, recipient)
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ctl.xcheck(err, "dropping messages from queue")
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ctl.xwrite(fmt.Sprintf("%d", count))
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ctl.xwriteok()
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case "queuedump":
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/* protocol:
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> "queuedump"
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> id
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< "ok" or error
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< stream
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*/
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idstr := ctl.xread()
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id, err := strconv.ParseInt(idstr, 10, 64)
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if err != nil {
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ctl.xcheck(err, "parsing id")
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}
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mr, err := queue.OpenMessage(ctx, id)
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ctl.xcheck(err, "opening message")
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defer func() {
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err := mr.Close()
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log.Check(err, "closing message from queue")
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}()
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ctl.xwriteok()
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ctl.xstreamfrom(mr)
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case "importmaildir", "importmbox":
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mbox := cmd == "importmbox"
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importctl(ctx, ctl, mbox)
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case "domainadd":
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/* protocol:
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> "domainadd"
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> domain
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> account
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> localpart
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< "ok" or error
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*/
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domain := ctl.xread()
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account := ctl.xread()
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localpart := ctl.xread()
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d, err := dns.ParseDomain(domain)
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ctl.xcheck(err, "parsing domain")
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err = mox.DomainAdd(ctx, d, account, smtp.Localpart(localpart))
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ctl.xcheck(err, "adding domain")
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ctl.xwriteok()
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case "domainrm":
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/* protocol:
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> "domainrm"
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> domain
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< "ok" or error
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*/
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domain := ctl.xread()
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d, err := dns.ParseDomain(domain)
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ctl.xcheck(err, "parsing domain")
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err = mox.DomainRemove(ctx, d)
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ctl.xcheck(err, "removing domain")
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ctl.xwriteok()
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case "accountadd":
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/* protocol:
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> "accountadd"
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> account
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> address
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< "ok" or error
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*/
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account := ctl.xread()
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address := ctl.xread()
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err := mox.AccountAdd(ctx, account, address)
|
|
ctl.xcheck(err, "adding account")
|
|
ctl.xwriteok()
|
|
|
|
case "accountrm":
|
|
/* protocol:
|
|
> "accountrm"
|
|
> account
|
|
< "ok" or error
|
|
*/
|
|
account := ctl.xread()
|
|
err := mox.AccountRemove(ctx, account)
|
|
ctl.xcheck(err, "removing account")
|
|
ctl.xwriteok()
|
|
|
|
case "addressadd":
|
|
/* protocol:
|
|
> "addressadd"
|
|
> address
|
|
> account
|
|
< "ok" or error
|
|
*/
|
|
address := ctl.xread()
|
|
account := ctl.xread()
|
|
err := mox.AddressAdd(ctx, address, account)
|
|
ctl.xcheck(err, "adding address")
|
|
ctl.xwriteok()
|
|
|
|
case "addressrm":
|
|
/* protocol:
|
|
> "addressrm"
|
|
> address
|
|
< "ok" or error
|
|
*/
|
|
address := ctl.xread()
|
|
err := mox.AddressRemove(ctx, address)
|
|
ctl.xcheck(err, "removing address")
|
|
ctl.xwriteok()
|
|
|
|
case "loglevels":
|
|
/* protocol:
|
|
> "loglevels"
|
|
< "ok"
|
|
< stream
|
|
*/
|
|
ctl.xwriteok()
|
|
l := mox.Conf.LogLevels()
|
|
keys := []string{}
|
|
for k := range l {
|
|
keys = append(keys, k)
|
|
}
|
|
sort.Slice(keys, func(i, j int) bool {
|
|
return keys[i] < keys[j]
|
|
})
|
|
s := ""
|
|
for _, k := range keys {
|
|
ks := k
|
|
if ks == "" {
|
|
ks = "(default)"
|
|
}
|
|
s += ks + ": " + mlog.LevelStrings[l[k]] + "\n"
|
|
}
|
|
ctl.xstreamfrom(strings.NewReader(s))
|
|
|
|
case "setloglevels":
|
|
/* protocol:
|
|
> "setloglevels"
|
|
> pkg
|
|
> level (if empty, log level for pkg will be unset)
|
|
< "ok" or error
|
|
*/
|
|
pkg := ctl.xread()
|
|
levelstr := ctl.xread()
|
|
if levelstr == "" {
|
|
mox.Conf.LogLevelRemove(pkg)
|
|
} else {
|
|
level, ok := mlog.Levels[levelstr]
|
|
if !ok {
|
|
ctl.xerror("bad level")
|
|
}
|
|
mox.Conf.LogLevelSet(pkg, level)
|
|
}
|
|
ctl.xwriteok()
|
|
|
|
case "retrain":
|
|
/* protocol:
|
|
> "retrain"
|
|
> account
|
|
< "ok" or error
|
|
*/
|
|
account := ctl.xread()
|
|
acc, err := store.OpenAccount(account)
|
|
ctl.xcheck(err, "open account")
|
|
defer func() {
|
|
if acc != nil {
|
|
err := acc.Close()
|
|
log.Check(err, "closing account after retraining")
|
|
}
|
|
}()
|
|
|
|
acc.WithWLock(func() {
|
|
conf, _ := acc.Conf()
|
|
if conf.JunkFilter == nil {
|
|
ctl.xcheck(store.ErrNoJunkFilter, "looking for junk filter")
|
|
}
|
|
|
|
// Remove existing junk filter files.
|
|
basePath := mox.DataDirPath("accounts")
|
|
dbPath := filepath.Join(basePath, acc.Name, "junkfilter.db")
|
|
bloomPath := filepath.Join(basePath, acc.Name, "junkfilter.bloom")
|
|
err := os.Remove(dbPath)
|
|
log.Check(err, "removing old junkfilter database file", mlog.Field("path", dbPath))
|
|
err = os.Remove(bloomPath)
|
|
log.Check(err, "removing old junkfilter bloom filter file", mlog.Field("path", bloomPath))
|
|
|
|
// Open junk filter, this creates new files.
|
|
jf, _, err := acc.OpenJunkFilter(ctx, ctl.log)
|
|
ctl.xcheck(err, "open new junk filter")
|
|
defer func() {
|
|
if jf == nil {
|
|
return
|
|
}
|
|
err := jf.Close()
|
|
log.Check(err, "closing junk filter during cleanup")
|
|
}()
|
|
|
|
// Read through messages with junk or nonjunk flag set, and train them.
|
|
var total, trained int
|
|
q := bstore.QueryDB[store.Message](ctx, acc.DB)
|
|
q.FilterEqual("Expunged", false)
|
|
err = q.ForEach(func(m store.Message) error {
|
|
total++
|
|
ok, err := acc.TrainMessage(ctx, ctl.log, jf, m)
|
|
if ok {
|
|
trained++
|
|
}
|
|
return err
|
|
})
|
|
ctl.xcheck(err, "training messages")
|
|
ctl.log.Info("retrained messages", mlog.Field("total", total), mlog.Field("trained", trained))
|
|
|
|
// Close junk filter, marking success.
|
|
err = jf.Close()
|
|
jf = nil
|
|
ctl.xcheck(err, "closing junk filter")
|
|
})
|
|
|
|
ctl.xwriteok()
|
|
|
|
case "backup":
|
|
backupctl(ctx, ctl)
|
|
|
|
default:
|
|
log.Info("unrecognized command", mlog.Field("cmd", cmd))
|
|
ctl.xwrite("unrecognized command")
|
|
return
|
|
}
|
|
}
|