Add cli_pull_reply

[abartlet/samba.git/.git] / source3 / libsmb / async_smb.c

diff --git a/source3/libsmb/async_smb.c b/source3/libsmb/async_smb.c
index e58b753da2bff099b68edf36a9cd854fd6cc04a3..32f0e8abd6124f96bfda972fc1ee3668b8d1b004 100644 (file)
--- a/source3/libsmb/async_smb.c
+++ b/source3/libsmb/async_smb.c
@@ -230,6 +230,60 @@ struct async_req *cli_request_send(TALLOC_CTX *mem_ctx,
        return result;
 }
 
+/**
+ * @brief Pull reply data out of a request
+ * @param[in] req              The request that we just received a reply for
+ * @param[out] pwct            How many words did the server send?
+ * @param[out] pvwv            The words themselves
+ * @param[out] pnum_bytes      How many bytes did the server send?
+ * @param[out] pbytes          The bytes themselves
+ * @retval Was the reply formally correct?
+ */
+
+NTSTATUS cli_pull_reply(struct async_req *req,
+                       uint8_t *pwct, uint16_t **pvwv,
+                       uint16_t *pnum_bytes, uint8_t **pbytes)
+{
+       struct cli_request *cli_req = cli_request_get(req);
+       uint8_t wct, cmd;
+       uint16_t num_bytes;
+       size_t wct_ofs, bytes_offset;
+       NTSTATUS status;
+
+       status = cli_pull_error(cli_req->inbuf);
+
+       if (NT_STATUS_IS_ERR(status)) {
+               cli_set_error(cli_req->cli, status);
+               return status;
+       }
+
+       cmd = CVAL(cli_req->inbuf, smb_com);
+       wct_ofs = smb_wct;
+
+       wct = CVAL(cli_req->inbuf, wct_ofs);
+
+       bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
+       num_bytes = SVAL(cli_req->inbuf, bytes_offset);
+
+       /*
+        * wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
+        * is a 16-bit value. So bytes_offset being size_t should be far from
+        * wrapping.
+        */
+
+       if ((bytes_offset + 2 > talloc_get_size(cli_req->inbuf))
+           || (bytes_offset > 0xffff)) {
+               return NT_STATUS_INVALID_NETWORK_RESPONSE;
+       }
+
+       *pwct = wct;
+       *pvwv = (uint16_t *)(cli_req->inbuf + wct_ofs + 1);
+       *pnum_bytes = num_bytes;
+       *pbytes = (uint8_t *)cli_req->inbuf + bytes_offset + 2;
+
+       return NT_STATUS_OK;
+}
+
 /*
  * Convenience function to get the SMB part out of an async_req
  */