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sshServerVersionPicker.go
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/
sshServerVersionPicker.go
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/*
* Copyright (c) 2019, Psiphon Inc.
* All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package server
import (
"sync/atomic"
"github.com/Psiphon-Labs/psiphon-tunnel-core/psiphon/common/prng"
)
var registeredSSHServerVersionPicker atomic.Value
func RegisterSSHServerVersionPicker(picker func(*prng.Seed) string) {
registeredSSHServerVersionPicker.Store(picker)
}
func pickSSHServerVersion(seed *prng.Seed) string {
picker := registeredSSHServerVersionPicker.Load()
if picker != nil {
return picker.(func(*prng.Seed) string)(seed)
}
return ""
}