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add support for data transfer bandwidth limits

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with total limit or separate settings for uploads and downloads and
overrides based on the client's IP address.

Limits can be reset using the REST API

Signed-off-by: Nicola Murino <nicola.murino@gmail.com>
This commit is contained in:
Nicola Murino
2022-01-30 11:42:36 +01:00
parent aca71bff7a
commit 1df1225eed
55 changed files with 3573 additions and 643 deletions
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19
sftpd/transfer.go
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@@ -95,6 +95,9 @@ func (t *transfer) ReadAt(p []byte, off int64) (n int, err error) {
n, err = t.readerAt.ReadAt(p, off)
atomic.AddInt64(&t.BytesSent, int64(n))
if err == nil {
err = t.CheckRead()
}
if err != nil && err != io.EOF {
if t.GetType() == common.TransferDownload {
t.TransferError(err)
@@ -118,8 +121,8 @@ func (t *transfer) WriteAt(p []byte, off int64) (n int, err error) {
n, err = t.writerAt.WriteAt(p, off)
atomic.AddInt64(&t.BytesReceived, int64(n))
if t.MaxWriteSize > 0 && err == nil && atomic.LoadInt64(&t.BytesReceived) > t.MaxWriteSize {
err = common.ErrQuotaExceeded
if err == nil {
err = t.CheckWrite()
}
if err != nil {
t.TransferError(err)
@@ -197,12 +200,16 @@ func (t *transfer) copyFromReaderToWriter(dst io.Writer, src io.Reader) (int64,
written += int64(nw)
if isDownload {
atomic.StoreInt64(&t.BytesSent, written)
if errCheck := t.CheckRead(); errCheck != nil {
err = errCheck
break
}
} else {
atomic.StoreInt64(&t.BytesReceived, written)
}
if t.MaxWriteSize > 0 && written > t.MaxWriteSize {
err = common.ErrQuotaExceeded
break
if errCheck := t.CheckWrite(); errCheck != nil {
err = errCheck
break
}
}
}
if ew != nil {