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prevent nick reservation land-grabs

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This commit is contained in:
Shivaram Lingamneni 2019-02-05 19:03:42 -05:00
parent 726dbedab6
commit 775ead700f
4 changed files with 31 additions and 26 deletions
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10
irc/accounts.go
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@ -306,8 +306,16 @@ func (am *AccountManager) Register(client *Client, account string, callbackNames
return errAccountAlreadyRegistered
}
// can't register a guest nickname
config := am.server.AccountConfig()
// if nick reservation is enabled, you can only register your current nickname
// as an account; this prevents "land-grab" situations where someone else
// registers your nick out from under you and then NS GHOSTs you
// n.b. client is nil during a SAREGISTER:
if config.NickReservation.Enabled && client != nil && client.Nick() != account {
return errAccountMustHoldNick
}
// can't register a guest nickname
renamePrefix := strings.ToLower(config.NickReservation.RenamePrefix)
if renamePrefix != "" && strings.HasPrefix(casefoldedAccount, renamePrefix) {
return errAccountAlreadyRegistered