mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-06-25 00:20:35 +00:00
69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package httpclient
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import (
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"net/netip"
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"syscall"
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"github.com/superseriousbusiness/gotosocial/internal/netutil"
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)
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type sanitizer struct {
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allow []netip.Prefix
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block []netip.Prefix
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}
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// Sanitize implements the required net.Dialer.Control function signature.
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func (s *sanitizer) Sanitize(ntwrk, addr string, _ syscall.RawConn) error {
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// Parse IP+port from addr
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ipport, err := netip.ParseAddrPort(addr)
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if err != nil {
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return err
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}
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if !(ntwrk == "tcp4" || ntwrk == "tcp6") {
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return ErrInvalidNetwork
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}
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// Seperate the IP
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ip := ipport.Addr()
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// Check if this is explicitly allowed
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for i := 0; i < len(s.allow); i++ {
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if s.allow[i].Contains(ip) {
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return nil
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}
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}
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// Now check if explicity blocked
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for i := 0; i < len(s.block); i++ {
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if s.block[i].Contains(ip) {
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return ErrReservedAddr
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}
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}
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// Validate this is a safe IP
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if !netutil.ValidateIP(ip) {
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return ErrReservedAddr
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}
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return nil
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}
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