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Fix proxied DLINE/throttle/etc error messages

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This commit is contained in:
Daniel Oaks 2017-09-29 07:18:08 +10:00
parent a9e4ed237e
commit ffe7375a68
2 changed files with 12 additions and 19 deletions
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8
irc/connection_throttling.go
View File

@ -7,8 +7,6 @@ import (
"fmt" "fmt"
"net" "net"
"time" "time"
"github.com/goshuirc/irc-go/ircmsg"
) )
// ThrottleDetails holds the connection-throttling details for a subnet/IP. // ThrottleDetails holds the connection-throttling details for a subnet/IP.
@ -115,12 +113,6 @@ func NewConnectionThrottle(config ConnectionThrottleConfig) (*ConnectionThrottle
ct.BanDuration = config.BanDuration ct.BanDuration = config.BanDuration
ct.BanMessage = config.BanMessage ct.BanMessage = config.BanMessage
ircmsgOutput := ircmsg.MakeMessage(nil, "", "ERROR", ct.BanMessage)
msg, err := ircmsgOutput.Line()
if err != nil {
return nil, fmt.Errorf("Could not make error message: %s", err.Error())
}
ct.BanMessageBytes = []byte(msg)
// assemble exempted nets // assemble exempted nets
for _, cidr := range config.Exempted { for _, cidr := range config.Exempted {

21
irc/server.go
View File

@ -31,10 +31,11 @@ import (
) )
var ( var (
// common error line to sub values into
errorMsg, _ = (&[]ircmsg.IrcMessage{ircmsg.MakeMessage(nil, "", "ERROR", "%s ")}[0]).Line()
// common error responses // common error responses
tooManyClientsMsg, _ = (&[]ircmsg.IrcMessage{ircmsg.MakeMessage(nil, "", "ERROR", "Too many clients from your network")}[0]).Line()
couldNotParseIPMsg, _ = (&[]ircmsg.IrcMessage{ircmsg.MakeMessage(nil, "", "ERROR", "Unable to parse your IP address")}[0]).Line() couldNotParseIPMsg, _ = (&[]ircmsg.IrcMessage{ircmsg.MakeMessage(nil, "", "ERROR", "Unable to parse your IP address")}[0]).Line()
bannedFromServerMsg, _ = (&[]ircmsg.IrcMessage{ircmsg.MakeMessage(nil, "", "ERROR", "You are banned from this server (%s)")}[0]).Line()
) )
const ( const (
@ -275,7 +276,8 @@ func (server *Server) Run() {
isBanned, banMsg := server.checkBans(ipaddr) isBanned, banMsg := server.checkBans(ipaddr)
if isBanned { if isBanned {
conn.Conn.Write(banMsg) // this might not show up properly on some clients, but our objective here is just to close the connection out before it has a load impact on us
conn.Conn.Write([]byte(fmt.Sprintf(errorMsg, banMsg)))
conn.Conn.Close() conn.Conn.Close()
continue continue
} }
@ -289,11 +291,11 @@ func (server *Server) Run() {
} }
} }
func (server *Server) checkBans(ipaddr net.IP) (banned bool, message []byte) { func (server *Server) checkBans(ipaddr net.IP) (banned bool, message string) {
// check DLINEs // check DLINEs
isBanned, info := server.dlines.CheckIP(ipaddr) isBanned, info := server.dlines.CheckIP(ipaddr)
if isBanned { if isBanned {
return true, []byte(info.BanMessage(bannedFromServerMsg)) return true, info.BanMessage("You are banned from this server (%s)")
} }
// check connection limits // check connection limits
@ -302,8 +304,7 @@ func (server *Server) checkBans(ipaddr net.IP) (banned bool, message []byte) {
server.connectionLimitsMutex.Unlock() server.connectionLimitsMutex.Unlock()
if err != nil { if err != nil {
// too many connections from one client, tell the client and close the connection // too many connections from one client, tell the client and close the connection
// this might not show up properly on some clients, but our objective here is just to close it out before it has a load impact on us return true, "Too many clients from your network"
return true, []byte(tooManyClientsMsg)
} }
// check connection throttle // check connection throttle
@ -323,10 +324,10 @@ func (server *Server) checkBans(ipaddr net.IP) (banned bool, message []byte) {
server.connectionThrottle.ResetFor(ipaddr) server.connectionThrottle.ResetFor(ipaddr)
// this might not show up properly on some clients, but our objective here is just to close it out before it has a load impact on us // this might not show up properly on some clients, but our objective here is just to close it out before it has a load impact on us
return true, []byte(server.connectionThrottle.BanMessageBytes) return true, server.connectionThrottle.BanMessage
} }
return false, nil return false, ""
} }
// //
@ -2196,7 +2197,7 @@ func proxyHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
isBanned, banMsg := server.checkBans(parsedProxiedIP) isBanned, banMsg := server.checkBans(parsedProxiedIP)
if isBanned { if isBanned {
client.Quit(string(banMsg)) client.Quit(banMsg)
return true return true
} }