65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
|
/*
|
||
|
|
GoToSocial
|
||
|
|
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
|
||
|
|
|
||
|
|
This program is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU Affero General Public License as published by
|
||
|
|
the Free Software Foundation, either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
This program is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU Affero General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Affero General Public License
|
||
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
package httpclient
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net/netip"
|
||
|
|
"syscall"
|
||
|
|
|
||
|
|
"github.com/superseriousbusiness/gotosocial/internal/netutil"
|
||
|
|
)
|
||
|
|
|
||
|
|
type sanitizer struct {
|
||
|
|
allow []netip.Prefix
|
||
|
|
block []netip.Prefix
|
||
|
|
}
|
||
|
|
|
||
|
|
// Sanitize implements the required net.Dialer.Control function signature.
|
||
|
|
func (s *sanitizer) Sanitize(ntwrk, addr string, _ syscall.RawConn) error {
|
||
|
|
// Parse IP+port from addr
|
||
|
|
ipport, err := netip.ParseAddrPort(addr)
|
||
|
|
if err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
// Seperate the IP
|
||
|
|
ip := ipport.Addr()
|
||
|
|
|
||
|
|
// Check if this is explicitly allowed
|
||
|
|
for i := 0; i < len(s.allow); i++ {
|
||
|
|
if s.allow[i].Contains(ip) {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Now check if explicity blocked
|
||
|
|
for i := 0; i < len(s.block); i++ {
|
||
|
|
if s.block[i].Contains(ip) {
|
||
|
|
return ErrReservedAddr
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Validate this is a safe IP
|
||
|
|
if !netutil.ValidateIP(ip) {
|
||
|
|
return ErrReservedAddr
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|