/**
* Parses request headers.
*
* @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_HEADERS(htp_connp_t *connp) {
for (;;) {
IN_COPY_BYTE_OR_RETURN(connp);
// Have we reached the end of the line?
if (connp->in_next_byte == LF) {
unsigned char *data;
size_t len;
htp_connp_req_consolidate_data(connp, &data, &len);
#ifdef HTP_DEBUG
fprint_raw_data(stderr, __FUNCTION__, data, len);
#endif
// Should we terminate headers?
if (htp_connp_is_line_terminator(connp, data, len)) {
// Parse previous header, if any.
if (connp->in_header != NULL) {
if (connp->cfg->process_request_header(connp, bstr_ptr(connp->in_header),
bstr_len(connp->in_header)) != HTP_OK) return HTP_ERROR;
bstr_free(connp->in_header);
connp->in_header = NULL;
}
htp_connp_req_clear_buffer(connp);
// We've seen all the request headers.
return htp_tx_state_request_headers(connp->in_tx);
}
htp_chomp(data, &len);
// Check for header folding.
if (htp_connp_is_line_folded(data, len) == 0) {
// New header line.
// Parse previous header, if any.
if (connp->in_header != NULL) {
if (connp->cfg->process_request_header(connp, bstr_ptr(connp->in_header),
bstr_len(connp->in_header)) != HTP_OK) return HTP_ERROR;
bstr_free(connp->in_header);
connp->in_header = NULL;
}
IN_PEEK_NEXT(connp);
if (htp_is_folding_char(connp->in_next_byte) == 0) {
// Because we know this header is not folded, we can process the buffer straight away.
if (connp->cfg->process_request_header(connp, data, len) != HTP_OK) return HTP_ERROR;
} else {
// Keep the partial header data for parsing later.
connp->in_header = bstr_dup_mem(data, len);
if (connp->in_header == NULL) return HTP_ERROR;
}
} else {
// Folding; check that there's a previous header line to add to.
if (connp->in_header == NULL) {
// Invalid folding.
// Warn only once per transaction.
if (!(connp->in_tx->flags & HTP_INVALID_FOLDING)) {
connp->in_tx->flags |= HTP_INVALID_FOLDING;
htp_log(connp, HTP_LOG_MARK, HTP_LOG_WARNING, 0, "Invalid request field folding");
}
// Keep the header data for parsing later.
connp->in_header = bstr_dup_mem(data, len);
if (connp->in_header == NULL) return HTP_ERROR;
} else {
// Add to the existing header.
bstr *new_in_header = bstr_add_mem(connp->in_header, data, len);
if (new_in_header == NULL) return HTP_ERROR;
connp->in_header = new_in_header;
}
}
htp_connp_req_clear_buffer(connp);
}
}
return HTP_ERROR;
}
/**
* Parses response headers.
*
* @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_RES_HEADERS(htp_connp_t *connp) {
for (;;) {
OUT_COPY_BYTE_OR_RETURN(connp);
// Have we reached the end of the line?
if (connp->out_next_byte == LF) {
unsigned char *data;
size_t len;
htp_connp_res_consolidate_data(connp, &data, &len);
#ifdef HTP_DEBUG
fprint_raw_data(stderr, __FUNCTION__, data, len);
#endif
// Should we terminate headers?
if (htp_connp_is_line_terminator(connp, data, len)) {
// Parse previous header, if any.
if (connp->out_header != NULL) {
if (connp->cfg->process_response_header(connp, bstr_ptr(connp->out_header),
bstr_len(connp->out_header)) != HTP_OK) return HTP_ERROR;
bstr_free(connp->out_header);
connp->out_header = NULL;
}
htp_connp_res_clear_buffer(connp);
// We've seen all response headers.
if (connp->out_tx->progress == HTP_RESPONSE_HEADERS) {
// Response headers.
// The next step is to determine if this response has a body.
connp->out_state = htp_connp_RES_BODY_DETERMINE;
} else {
// Response trailer.
// Finalize sending raw trailer data.
htp_status_t rc = htp_connp_res_receiver_finalize_clear(connp);
if (rc != HTP_OK) return rc;
// Run hook response_TRAILER.
rc = htp_hook_run_all(connp->cfg->hook_response_trailer, connp);
if (rc != HTP_OK) return rc;
// The next step is to finalize this response.
connp->out_state = htp_connp_RES_FINALIZE;
}
return HTP_OK;
}
htp_chomp(data, &len);
// Check for header folding.
if (htp_connp_is_line_folded(data, len) == 0) {
// New header line.
// Parse previous header, if any.
if (connp->out_header != NULL) {
if (connp->cfg->process_response_header(connp, bstr_ptr(connp->out_header),
bstr_len(connp->out_header)) != HTP_OK) return HTP_ERROR;
bstr_free(connp->out_header);
connp->out_header = NULL;
}
OUT_PEEK_NEXT(connp);
if (htp_is_folding_char(connp->out_next_byte) == 0) {
// Because we know this header is not folded, we can process the buffer straight away.
if (connp->cfg->process_response_header(connp, data, len) != HTP_OK) return HTP_ERROR;
} else {
// Keep the partial header data for parsing later.
connp->out_header = bstr_dup_mem(data, len);
if (connp->out_header == NULL) return HTP_ERROR;
}
} else {
// Folding; check that there's a previous header line to add to.
if (connp->out_header == NULL) {
// Invalid folding.
// Warn only once per transaction.
if (!(connp->out_tx->flags & HTP_INVALID_FOLDING)) {
connp->out_tx->flags |= HTP_INVALID_FOLDING;
htp_log(connp, HTP_LOG_MARK, HTP_LOG_WARNING, 0, "Invalid response field folding");
}
// Keep the header data for parsing later.
connp->out_header = bstr_dup_mem(data, len);
if (connp->out_header == NULL) return HTP_ERROR;
} else {
// Add to the existing header.
bstr *new_out_header = bstr_add_mem(connp->out_header, data, len);
if (new_out_header == NULL) return HTP_ERROR;
connp->out_header = new_out_header;
}
}
htp_connp_res_clear_buffer(connp);
}
}
return HTP_ERROR;
}
