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s3:smb2_server: add smbd_smb2_request_verify_sizes()

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metze
This commit is contained in:
Stefan Metzmacher 2011-09-06 14:00:04 +02:00
parent fcd0c0e19e
commit 6985a1378b
2 changed files with 45 additions and 0 deletions
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3
source3/smbd/globals.h
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@ -269,6 +269,9 @@ NTSTATUS smbd_smb2_request_pending_queue(struct smbd_smb2_request *req,
struct smb_request *smbd_smb2_fake_smb_request(struct smbd_smb2_request *req);
void remove_smb2_chained_fsp(files_struct *fsp);
NTSTATUS smbd_smb2_request_verify_sizes(struct smbd_smb2_request *req,
size_t expected_body_size);
NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
NTSTATUS smbd_smb2_request_process_logoff(struct smbd_smb2_request *req);

42
source3/smbd/smb2_server.c
View File

@ -1250,6 +1250,48 @@ static NTSTATUS smbd_smb2_request_check_session(struct smbd_smb2_request *req)
return NT_STATUS_OK;
}
NTSTATUS smbd_smb2_request_verify_sizes(struct smbd_smb2_request *req,
size_t expected_body_size)
{
const uint8_t *inbody;
int i = req->current_idx;
size_t body_size;
/*
* The following should be checked already.
*/
if ((i+2) > req->in.vector_count) {
return NT_STATUS_INTERNAL_ERROR;
}
if (req->in.vector[i+0].iov_len != SMB2_HDR_BODY) {
return NT_STATUS_INTERNAL_ERROR;
}
if (req->in.vector[i+1].iov_len < 2) {
return NT_STATUS_INTERNAL_ERROR;
}
/*
* Now check the expected body size,
* where the last byte might be in the
* dynnamic section..
*/
if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
return NT_STATUS_INVALID_PARAMETER;
}
if (req->in.vector[i+2].iov_len < (expected_body_size & 0x00000001)) {
return NT_STATUS_INVALID_PARAMETER;
}
inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
body_size = SVAL(inbody, 0x00);
if (body_size != expected_body_size) {
return NT_STATUS_INVALID_PARAMETER;
}
return NT_STATUS_OK;
}
NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
{
const uint8_t *inhdr;