/**
* The idle state is invoked before and after every transaction. Consequently,
* it will start a new transaction when data is available and finalise a transaction
* which has been processed.
*
* @param connp
* @returns HTP_OK on state change, HTTP_ERROR on error, or HTP_DATA when more data is needed.
*/
int htp_connp_REQ_IDLE(htp_connp_t * connp) {
// If we're here and a transaction object exists that
// means we've just completed parsing a request. We need
// to run the final hook and start over.
if (connp->in_tx != NULL) {
// Run hook REQUEST
int rc = hook_run_all(connp->cfg->hook_request, connp);
if (rc != HOOK_OK) {
htp_log(connp, HTP_LOG_MARK, HTP_LOG_ERROR, 0,
"Request callback returned error (%d)", rc);
return HTP_ERROR;
}
// Start afresh
connp->in_tx = NULL;
}
// We want to start parsing the next request (and change
// the state from IDLE) only if there's at least one
// byte of data available. Otherwise we could be creating
// new structures even if there's no more data on the
// connection.
IN_TEST_NEXT_BYTE_OR_RETURN(connp);
// Detect pipelining
if (list_size(connp->conn->transactions) > connp->out_next_tx_index) {
connp->conn->flags |= PIPELINED_CONNECTION;
}
// Parsing a new request
connp->in_tx = htp_tx_create(connp->cfg, CFG_SHARED, connp->conn);
if (connp->in_tx == NULL) return HTP_ERROR;
connp->in_tx->connp = connp;
list_add(connp->conn->transactions, connp->in_tx);
connp->in_content_length = -1;
connp->in_body_data_left = -1;
connp->in_header_line_index = -1;
connp->in_header_line_counter = 0;
connp->in_chunk_request_index = connp->in_chunk_count;
// Run hook TRANSACTION_START
int rc = hook_run_all(connp->cfg->hook_transaction_start, connp);
if (rc != HOOK_OK) {
htp_log(connp, HTP_LOG_MARK, HTP_LOG_ERROR, 0,
"Transaction start callback returned error (%d)", rc);
return HTP_ERROR;
}
// Change state into request line parsing
connp->in_state = htp_connp_REQ_LINE;
connp->in_tx->progress[0] = TX_PROGRESS_REQ_LINE;
return HTP_OK;
}
/**
* The idle state is where the parser will end up after a transaction is processed.
* If there is more data available, a new request will be started.
*
* @param[in] connp
* @returns HTP_OK on state change, HTP_ERROR on error, or HTP_DATA when more data is needed.
*/
htp_status_t htp_connp_REQ_IDLE(htp_connp_t * connp) {
// We want to start parsing the next request (and change
// the state from IDLE) only if there's at least one
// byte of data available. Otherwise we could be creating
// new structures even if there's no more data on the
// connection.
IN_TEST_NEXT_BYTE_OR_RETURN(connp);
connp->in_tx = htp_connp_tx_create(connp);
if (connp->in_tx == NULL) return HTP_ERROR;
// Change state to TRANSACTION_START
htp_tx_state_request_start(connp->in_tx);
return HTP_OK;
}
