brouzouf/ftp
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Revert accidental code removal.

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This commit is contained in:
Logan Freijo 2024-04-12 11:39:05 -04:00 committed by GitHub
parent 6e8e713355
commit acf978cd45
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1 changed files with 18 additions and 0 deletions
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18
ftp.go
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@ -541,9 +541,27 @@ func (c *ServerConn) pasv() (host string, port int, err error) {
// Make the IP address to connect to
host = strings.Join(pasvData[0:4], ".")
if c.host != host {
if cmdIP := net.ParseIP(c.host); cmdIP != nil {
if dataIP := net.ParseIP(host); dataIP != nil {
if isBogusDataIP(cmdIP, dataIP) {
return c.host, port, nil
}
}
}
}
return host, port, nil
}
func isBogusDataIP(cmdIP, dataIP net.IP) bool {
// Logic stolen from lftp (https://github.com/lavv17/lftp/blob/d67fc14d085849a6b0418bb3e912fea2e94c18d1/src/ftpclass.cc#L769)
return dataIP.IsMulticast() ||
cmdIP.IsPrivate() != dataIP.IsPrivate() ||
cmdIP.IsLoopback() != dataIP.IsLoopback()
}
// getDataConnPort returns a host, port for a new data connection
// it uses the best available method to do so
func (c *ServerConn) getDataConnPort() (string, int, error) {