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chasquid: Break connections after 10 errors

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If a connection has accumulated 10 errors, it's very likely that
something has gone significantly wrong, or they're just probing/abusing
the service.

This patch makes chasquid break the connection after 10 errors.
The number is arbitrary, we may adjust it later.
This commit is contained in:
Alberto Bertogli
2016-10-10 10:38:38 +01:00
parent aa0486b54e
commit 008cd98e39
1 changed files with 10 additions and 1 deletions
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11
chasquid.go
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@@ -474,6 +474,7 @@ func (c *Conn) Handle() {
var cmd, params string var cmd, params string
var err error var err error
var errCount int
loop: loop:
for { for {
@@ -538,9 +539,17 @@ loop:
if code > 0 { if code > 0 {
c.tr.Debugf("<- %d %s", code, msg) c.tr.Debugf("<- %d %s", code, msg)
// Be verbose about errors, to help troubleshooting.
if code >= 400 { if code >= 400 {
// Be verbose about errors, to help troubleshooting.
c.tr.Errorf("%s failed: %d %s", cmd, code, msg) c.tr.Errorf("%s failed: %d %s", cmd, code, msg)
errCount++
if errCount > 10 {
// https://tools.ietf.org/html/rfc5321#section-4.3.2
c.tr.Errorf("too many errors, breaking connection")
c.writeResponse(421, "too many errors, bye")
break
}
} }
err = c.writeResponse(code, msg) err = c.writeResponse(code, msg)