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allow a client if its IP is both allowed and denied

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this allows you to define a group deny policy that can be overridden
on a per-user basis.

This is a backward incompatible change

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>
This commit is contained in:
Nicola Murino
2022-09-15 19:51:17 +02:00
parent e58709c822
commit e54237ff70
2 changed files with 13 additions and 12 deletions
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20
internal/dataprovider/user.go
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@@ -1170,7 +1170,7 @@ func (u *User) GetBandwidthForIP(clientIP, connectionID string) (int64, int64) {
// IsLoginFromAddrAllowed returns true if the login is allowed from the specified remoteAddr.
// If AllowedIP is defined only the specified IP/Mask can login.
// If DeniedIP is defined the specified IP/Mask cannot login.
// If an IP is both allowed and denied then login will be denied
// If an IP is both allowed and denied then login will be allowed
func (u *User) IsLoginFromAddrAllowed(remoteAddr string) bool {
if len(u.Filters.AllowedIP) == 0 && len(u.Filters.DeniedIP) == 0 {
return true
@@ -1181,15 +1181,6 @@ func (u *User) IsLoginFromAddrAllowed(remoteAddr string) bool {
logger.Warn(logSender, "", "login allowed for invalid IP. remote address: %#v", remoteAddr)
return true
}
for _, IPMask := range u.Filters.DeniedIP {
_, IPNet, err := net.ParseCIDR(IPMask)
if err != nil {
return false
}
if IPNet.Contains(remoteIP) {
return false
}
}
for _, IPMask := range u.Filters.AllowedIP {
_, IPNet, err := net.ParseCIDR(IPMask)
if err != nil {
@@ -1199,6 +1190,15 @@ func (u *User) IsLoginFromAddrAllowed(remoteAddr string) bool {
return true
}
}
for _, IPMask := range u.Filters.DeniedIP {
_, IPNet, err := net.ParseCIDR(IPMask)
if err != nil {
return false
}
if IPNet.Contains(remoteIP) {
return false
}
}
return len(u.Filters.AllowedIP) == 0
}