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Always allow link-local peerings again

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This commit is contained in:
Neil Alexander 2022-10-22 16:23:25 +01:00
parent 63c4cb5c21
commit d66b3ffb7a
3 changed files with 20 additions and 23 deletions
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27
src/core/link.go
View File

@ -272,8 +272,7 @@ func (intf *link) handler() error {
var key keyArray
copy(key[:], meta.key)
if _, allowed := pinned[key]; !allowed {
intf.links.core.log.Errorf("Failed to connect to node: %q sent ed25519 key that does not match pinned keys", intf.name())
return fmt.Errorf("failed to connect: host sent ed25519 key that does not match pinned keys")
return fmt.Errorf("node public key that does not match pinned keys")
}
}
// Check if we're authorized to connect to this key / IP
@ -286,30 +285,32 @@ func (intf *link) handler() error {
}
}
if intf.incoming && !intf.force && !isallowed {
intf.links.core.log.Warnf("%s connection from %s forbidden: AllowedPublicKeys does not contain key %s",
strings.ToUpper(intf.info.linkType), intf.info.remote, hex.EncodeToString(meta.key))
_ = intf.close()
return fmt.Errorf("forbidden connection")
return fmt.Errorf("node public key %q is not in AllowedPublicKeys", hex.EncodeToString(meta.key))
}
phony.Block(intf.links, func() {
intf.links._links[intf.info] = intf
})
dir := "outbound"
if intf.incoming {
dir = "inbound"
}
remoteAddr := net.IP(address.AddrForKey(meta.key)[:]).String()
remoteStr := fmt.Sprintf("%s@%s", remoteAddr, intf.info.remote)
localStr := intf.conn.LocalAddr()
intf.links.core.log.Infof("Connected %s: %s, source %s",
strings.ToUpper(intf.info.linkType), remoteStr, localStr)
intf.links.core.log.Infof("Connected %s %s: %s, source %s",
dir, strings.ToUpper(intf.info.linkType), remoteStr, localStr)
err = intf.links.core.HandleConn(meta.key, intf.conn)
switch err {
case io.EOF, net.ErrClosed, nil:
intf.links.core.log.Infof("Disconnected %s: %s, source %s",
strings.ToUpper(intf.info.linkType), remoteStr, localStr)
intf.links.core.log.Infof("Disconnected %s %s: %s, source %s",
dir, strings.ToUpper(intf.info.linkType), remoteStr, localStr)
default:
intf.links.core.log.Infof("Disconnected %s: %s, source %s; error: %s",
strings.ToUpper(intf.info.linkType), remoteStr, localStr, err)
intf.links.core.log.Infof("Disconnected %s %s: %s, source %s; error: %s",
dir, strings.ToUpper(intf.info.linkType), remoteStr, localStr, err)
}
return nil
}
@ -318,10 +319,6 @@ func (intf *link) close() error {
return intf.conn.Close()
}
func (intf *link) name() string {
return intf.lname
}
func linkInfoFor(linkType, sintf, remote string) linkInfo {
if h, _, err := net.SplitHostPort(remote); err == nil {
remote = h

8
src/core/link_tcp.go
View File

@ -47,7 +47,7 @@ func (l *linkTCP) dial(url *url.URL, options linkOptions, sintf string) error {
if err != nil {
return err
}
return l.handler(url.String(), info, conn, options, false)
return l.handler(url.String(), info, conn, options, false, false)
}
func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
@ -84,7 +84,7 @@ func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
addr := conn.RemoteAddr().(*net.TCPAddr)
name := fmt.Sprintf("tcp://%s", addr)
info := linkInfoFor("tcp", sintf, strings.SplitN(addr.IP.String(), "%", 2)[0])
if err = l.handler(name, info, conn, linkOptions{}, true); err != nil {
if err = l.handler(name, info, conn, linkOptions{}, true, addr.IP.IsLinkLocalUnicast()); err != nil {
l.core.log.Errorln("Failed to create inbound link:", err)
}
}
@ -95,13 +95,13 @@ func (l *linkTCP) listen(url *url.URL, sintf string) (*Listener, error) {
return entry, nil
}
func (l *linkTCP) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
func (l *linkTCP) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
return l.links.create(
conn, // connection
name, // connection name
info, // connection info
incoming, // not incoming
false, // not forced
force, // not forced
options, // connection options
)
}

8
src/core/link_tls.go
View File

@ -69,7 +69,7 @@ func (l *linkTLS) dial(url *url.URL, options linkOptions, sintf, sni string) err
if err != nil {
return err
}
return l.handler(url.String(), info, conn, options, false)
return l.handler(url.String(), info, conn, options, false, false)
}
func (l *linkTLS) listen(url *url.URL, sintf string) (*Listener, error) {
@ -107,7 +107,7 @@ func (l *linkTLS) listen(url *url.URL, sintf string) (*Listener, error) {
addr := conn.RemoteAddr().(*net.TCPAddr)
name := fmt.Sprintf("tls://%s", addr)
info := linkInfoFor("tls", sintf, strings.SplitN(addr.IP.String(), "%", 2)[0])
if err = l.handler(name, info, conn, linkOptions{}, true); err != nil {
if err = l.handler(name, info, conn, linkOptions{}, true, addr.IP.IsLinkLocalUnicast()); err != nil {
l.core.log.Errorln("Failed to create inbound link:", err)
}
}
@ -165,6 +165,6 @@ func (l *linkTLS) generateConfig() (*tls.Config, error) {
}, nil
}
func (l *linkTLS) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming bool) error {
return l.tcp.handler(name, info, conn, options, incoming)
func (l *linkTLS) handler(name string, info linkInfo, conn net.Conn, options linkOptions, incoming, force bool) error {
return l.tcp.handler(name, info, conn, options, incoming, force)
}