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add a config switch to accept hostnames from WEBIRC
See #1686; this allows i2pd to pass the i2p address to Ergo, which may be useful for moderation under some circumstances.
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@ -218,6 +218,10 @@ server:
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# - "192.168.1.1"
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# - "192.168.10.1/24"
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# whether to accept the hostname parameter on the WEBIRC line as the IRC hostname
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# (the default/recommended Ergo configuration will use cloaks instead)
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accept-hostname: false
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# maximum length of clients' sendQ in bytes
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# this should be big enough to hold bursts of channel/direct messages
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max-sendq: 96k
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@ -160,13 +160,14 @@ type Session struct {
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idleTimer *time.Timer
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pingSent bool // we sent PING to a putatively idle connection and we're waiting for PONG
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sessionID int64
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socket *Socket
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realIP net.IP
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proxiedIP net.IP
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rawHostname string
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isTor bool
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hideSTS bool
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sessionID int64
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socket *Socket
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realIP net.IP
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proxiedIP net.IP
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rawHostname string
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hostnameFinalized bool
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isTor bool
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hideSTS bool
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fakelag Fakelag
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deferredFakelagCount int
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@ -488,12 +489,21 @@ func (client *Client) resizeHistory(config *Config) {
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}
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}
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// resolve an IP to an IRC-ready hostname, using reverse DNS, forward-confirming if necessary,
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// and sending appropriate notices to the client
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func (client *Client) lookupHostname(session *Session, overwrite bool) {
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// once we have the final IP address (from the connection itself or from proxy data),
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// compute the various possibilities for the hostname:
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// * In the default/recommended configuration, via the cloak algorithm
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// * If hostname lookup is enabled, via (forward-confirmed) reverse DNS
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// * If WEBIRC was used, possibly via the hostname passed on the WEBIRC line
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func (client *Client) finalizeHostname(session *Session) {
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// only allow this once, since registration can fail (e.g. if the nickname is in use)
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if session.hostnameFinalized {
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return
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}
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session.hostnameFinalized = true
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if session.isTor {
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return
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} // else: even if cloaking is enabled, look up the real hostname to show to operators
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}
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config := client.server.Config()
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ip := session.realIP
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@ -501,30 +511,27 @@ func (client *Client) lookupHostname(session *Session, overwrite bool) {
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ip = session.proxiedIP
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}
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var hostname string
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lookupSuccessful := false
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if config.Server.lookupHostnames {
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session.Notice("*** Looking up your hostname...")
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hostname, lookupSuccessful = utils.LookupHostname(ip, config.Server.ForwardConfirmHostnames)
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if lookupSuccessful {
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session.Notice("*** Found your hostname")
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// even if cloaking is enabled, we may want to look up the real hostname to show to operators:
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if session.rawHostname == "" {
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var hostname string
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lookupSuccessful := false
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if config.Server.lookupHostnames {
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session.Notice("*** Looking up your hostname...")
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hostname, lookupSuccessful = utils.LookupHostname(ip, config.Server.ForwardConfirmHostnames)
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if lookupSuccessful {
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session.Notice("*** Found your hostname")
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} else {
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session.Notice("*** Couldn't look up your hostname")
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}
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} else {
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session.Notice("*** Couldn't look up your hostname")
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hostname = utils.IPStringToHostname(ip.String())
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}
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} else {
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hostname = utils.IPStringToHostname(ip.String())
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session.rawHostname = hostname
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}
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session.rawHostname = hostname
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cloakedHostname := config.Server.Cloaks.ComputeCloak(ip)
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client.stateMutex.Lock()
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defer client.stateMutex.Unlock()
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// update the hostname if this is a new connection, but not if it's a reattach
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if overwrite || client.rawHostname == "" {
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client.rawHostname = hostname
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client.cloakedHostname = cloakedHostname
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client.updateNickMaskNoMutex()
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}
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// these will be discarded if this is actually a reattach:
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client.rawHostname = session.rawHostname
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client.cloakedHostname = config.Server.Cloaks.ComputeCloak(ip)
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}
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func (client *Client) doIdentLookup(conn net.Conn) {
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@ -32,6 +32,7 @@ type webircConfig struct {
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Fingerprint *string // legacy name for certfp, #1050
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Certfp string
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Hosts []string
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AcceptHostname bool `yaml:"accept-hostname"`
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allowedNets []net.IPNet
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}
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@ -3512,8 +3512,9 @@ func webircHandler(server *Server, client *Client, msg ircmsg.Message, rb *Respo
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}
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}
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config := server.Config()
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givenPassword := []byte(msg.Params[0])
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for _, info := range server.Config().Server.WebIRC {
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for _, info := range config.Server.WebIRC {
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if utils.IPInNets(client.realIP, info.allowedNets) {
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// confirm password and/or fingerprint
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if 0 < len(info.Password) && bcrypt.CompareHashAndPassword(info.Password, givenPassword) != nil {
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@ -3523,11 +3524,23 @@ func webircHandler(server *Server, client *Client, msg ircmsg.Message, rb *Respo
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continue
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}
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err, quitMsg := client.ApplyProxiedIP(rb.session, net.ParseIP(msg.Params[3]), secure)
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candidateIP := msg.Params[3]
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err, quitMsg := client.ApplyProxiedIP(rb.session, net.ParseIP(candidateIP), secure)
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if err != nil {
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client.Quit(quitMsg, rb.session)
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return true
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} else {
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if info.AcceptHostname {
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candidateHostname := msg.Params[2]
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if candidateHostname != candidateIP {
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if utils.IsHostname(candidateHostname) {
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rb.session.rawHostname = candidateHostname
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} else {
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// log this at debug level since it may be spammy
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server.logger.Debug("internal", "invalid hostname from WEBIRC", candidateHostname)
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}
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}
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}
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return false
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}
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}
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@ -314,9 +314,7 @@ func (server *Server) checkBanScriptExemptSASL(config *Config, session *Session)
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func (server *Server) tryRegister(c *Client, session *Session) (exiting bool) {
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// XXX PROXY or WEBIRC MUST be sent as the first line of the session;
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// if we are here at all that means we have the final value of the IP
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if session.rawHostname == "" {
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session.client.lookupHostname(session, false)
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}
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c.finalizeHostname(session)
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// try to complete registration normally
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// XXX(#1057) username can be filled in by an ident query without the client
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@ -192,6 +192,9 @@ server:
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# - "192.168.1.1"
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# - "192.168.10.1/24"
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# whether to accept the hostname parameter on the WEBIRC line as the IRC hostname
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accept-hostname: true
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# maximum length of clients' sendQ in bytes
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# this should be big enough to hold bursts of channel/direct messages
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max-sendq: 96k
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