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Split upstream connection handling to separate function 

Just a refactoring, no functional change.
This commit is contained in:
Simon Ser 2022-04-15 09:37:43 +02:00
parent 2ba13fdefc
commit 77460dfb97
1 changed files with 46 additions and 42 deletions
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88
user.go
View File

@ -5,6 +5,7 @@ import (
"crypto/sha256"
"encoding/binary"
"encoding/hex"
"errors"
"fmt"
"math/big"
"net"
@ -186,6 +187,41 @@ func userIdent(u *User) string {
return hex.EncodeToString(h[:16])
}
func (net *network) runConn(ctx context.Context) error {
net.user.srv.metrics.upstreams.Add(1)
defer net.user.srv.metrics.upstreams.Add(-1)
uc, err := connectToUpstream(ctx, net)
if err != nil {
return fmt.Errorf("failed to connect: %w", err)
}
defer uc.Close()
if net.user.srv.Identd != nil {
net.user.srv.Identd.Store(uc.RemoteAddr().String(), uc.LocalAddr().String(), userIdent(&net.user.User))
defer net.user.srv.Identd.Delete(uc.RemoteAddr().String(), uc.LocalAddr().String())
}
uc.register(ctx)
if err := uc.runUntilRegistered(ctx); err != nil {
return fmt.Errorf("failed to register: %w", err)
}
// TODO: this is racy with net.stopped. If the network is stopped
// before the user goroutine receives eventUpstreamConnected, the
// connection won't be closed.
net.user.events <- eventUpstreamConnected{uc}
defer func() {
net.user.events <- eventUpstreamDisconnected{uc}
}()
if err := uc.readMessages(net.user.events); err != nil {
return fmt.Errorf("failed to handle messages: %w", err)
}
return nil
}
func (net *network) run() {
if !net.Enabled {
return
@ -205,57 +241,25 @@ func (net *network) run() {
}
lastTry = time.Now()
net.user.srv.metrics.upstreams.Add(1)
uc, err := connectToUpstream(context.TODO(), net)
if err != nil {
net.logger.Printf("failed to connect to upstream server %q: %v", net.Addr, err)
net.user.events <- eventUpstreamConnectionError{net, fmt.Errorf("failed to connect: %v", err)}
net.user.srv.metrics.upstreams.Add(-1)
net.user.srv.metrics.upstreamConnectErrorsTotal.Inc()
continue
}
if net.user.srv.Identd != nil {
net.user.srv.Identd.Store(uc.RemoteAddr().String(), uc.LocalAddr().String(), userIdent(&net.user.User))
}
uc.register(context.TODO())
if err := uc.runUntilRegistered(context.TODO()); err != nil {
if err := net.runConn(context.TODO()); err != nil {
text := err.Error()
temp := true
if regErr, ok := err.(registrationError); ok {
text = regErr.Reason()
var regErr registrationError
if errors.As(err, &regErr) {
text = "failed to register: " + regErr.Reason()
temp = regErr.Temporary()
}
uc.logger.Printf("failed to register: %v", text)
net.user.events <- eventUpstreamConnectionError{net, fmt.Errorf("failed to register: %v", text)}
uc.Close()
net.user.srv.metrics.upstreams.Add(-1)
net.logger.Printf("connection error to %q: %v", net.Addr, text)
net.user.events <- eventUpstreamConnectionError{net, fmt.Errorf("connection error: %v", err)}
net.user.srv.metrics.upstreamConnectErrorsTotal.Inc()
if !temp {
return
}
continue
} else {
backoff.Reset()
}
// TODO: this is racy with net.stopped. If the network is stopped
// before the user goroutine receives eventUpstreamConnected, the
// connection won't be closed.
net.user.events <- eventUpstreamConnected{uc}
if err := uc.readMessages(net.user.events); err != nil {
uc.logger.Printf("failed to handle messages: %v", err)
net.user.events <- eventUpstreamError{uc, fmt.Errorf("failed to handle messages: %v", err)}
}
uc.Close()
net.user.events <- eventUpstreamDisconnected{uc}
if net.user.srv.Identd != nil {
net.user.srv.Identd.Delete(uc.RemoteAddr().String(), uc.LocalAddr().String())
}
net.user.srv.metrics.upstreams.Add(-1)
backoff.Reset()
}
}