Add the internals of is_smb2_recvfile_write.

This turns on the real receivefile detection, and completes
the receivefile code path changes.

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan (metze) Metzmacher <metze@samba.org>

diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c
index 226db15d732eb08af9718f6e797066ca2bdeb15e..57e9c7bfa80174a6ffabb4664fb1c7e799d23a7f 100644 (file)
--- a/source3/smbd/smb2_server.c
+++ b/source3/smbd/smb2_server.c
@@ -2894,7 +2894,43 @@ static struct tevent_req *smbd_smb2_request_read_send(TALLOC_CTX *mem_ctx,
 
 static bool is_smb2_recvfile_write(struct smbd_smb2_request_read_state *state)
 {
-       return false;
+       uint32_t flags;
+
+       if (IVAL(state->pktbuf, 0) == SMB2_TF_MAGIC) {
+               /* Transform header. Cannot recvfile. */
+               return false;
+       }
+       if (IVAL(state->pktbuf, 0) != SMB2_MAGIC) {
+               /* Not SMB2. Normal error path will cope. */
+               return false;
+       }
+       if (SVAL(state->pktbuf, 4) != SMB2_HDR_BODY) {
+               /* Not SMB2. Normal error path will cope. */
+               return false;
+       }
+       if (SVAL(state->pktbuf, SMB2_HDR_OPCODE) != SMB2_OP_WRITE) {
+               /* Needs to be a WRITE. */
+               return false;
+       }
+       if (IVAL(state->pktbuf, SMB2_HDR_NEXT_COMMAND) != 0) {
+               /* Chained. Cannot recvfile. */
+               return false;
+       }
+       flags = IVAL(state->pktbuf, SMB2_HDR_FLAGS);
+       if (flags & SMB2_HDR_FLAG_CHAINED) {
+               /* Chained. Cannot recvfile. */
+               return false;
+       }
+       if (flags & SMB2_HDR_FLAG_SIGNED) {
+               /* Signed. Cannot recvfile. */
+               return false;
+       }
+
+       DEBUG(10,("Doing recvfile write len = %u\n",
+               (unsigned int)(state->pktlen -
+               SMBD_SMB2_SHORT_RECEIVEFILE_WRITE_LEN)));
+
+       return true;
 }
 
 static int smbd_smb2_request_next_vector(struct tstream_context *stream,