| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| */ |
| |
| #include "dispatcher.h" |
| |
| #include "engine-internal.h" |
| #include "framing.h" |
| #include "logger_private.h" |
| #include "protocol.h" |
| |
| #include "dispatch_actions.h" |
| |
| int pni_bad_frame(pn_transport_t *transport, uint8_t frame_type, uint16_t channel, pn_data_t *args, const pn_bytes_t *payload) { |
| PN_LOG(&transport->logger, PN_SUBSYSTEM_AMQP, PN_LEVEL_ERROR, "Error dispatching frame: type: %d: Unknown performative", frame_type); |
| return PN_ERR; |
| } |
| |
| int pni_bad_frame_type(pn_transport_t *transport, uint8_t frame_type, uint16_t channel, pn_data_t *args, const pn_bytes_t *payload) { |
| PN_LOG(&transport->logger, PN_SUBSYSTEM_AMQP, PN_LEVEL_ERROR, "Error dispatching frame: Unknown frame type: %d", frame_type); |
| return PN_ERR; |
| } |
| |
| // We could use a table based approach here if we needed to dynamically |
| // add new performatives |
| static inline int pni_dispatch_action(pn_transport_t* transport, uint64_t lcode, uint8_t frame_type, uint16_t channel, pn_data_t *args, const pn_bytes_t *payload) |
| { |
| pn_action_t *action; |
| switch (frame_type) { |
| case AMQP_FRAME_TYPE: |
| /* Regular AMQP frames */ |
| switch (lcode) { |
| case OPEN: action = pn_do_open; break; |
| case BEGIN: action = pn_do_begin; break; |
| case ATTACH: action = pn_do_attach; break; |
| case FLOW: action = pn_do_flow; break; |
| case TRANSFER: action = pn_do_transfer; break; |
| case DISPOSITION: action = pn_do_disposition; break; |
| case DETACH: action = pn_do_detach; break; |
| case END: action = pn_do_end; break; |
| case CLOSE: action = pn_do_close; break; |
| default: action = pni_bad_frame; break; |
| }; |
| break; |
| case SASL_FRAME_TYPE: |
| /* SASL frames */ |
| switch (lcode) { |
| case SASL_MECHANISMS: action = pn_do_mechanisms; break; |
| case SASL_INIT: action = pn_do_init; break; |
| case SASL_CHALLENGE: action = pn_do_challenge; break; |
| case SASL_RESPONSE: action = pn_do_response; break; |
| case SASL_OUTCOME: action = pn_do_outcome; break; |
| default: action = pni_bad_frame; break; |
| }; |
| break; |
| default: action = pni_bad_frame_type; break; |
| }; |
| return action(transport, frame_type, channel, args, payload); |
| } |
| |
| static int pni_dispatch_frame(pn_transport_t * transport, pn_data_t *args, pn_frame_t frame) |
| { |
| if (frame.size == 0) { // ignore null frames |
| PN_LOG(&transport->logger, PN_SUBSYSTEM_AMQP, PN_LEVEL_FRAME, "%u <- (EMPTY FRAME)", frame.channel); |
| return 0; |
| } |
| |
| ssize_t dsize = pn_data_decode(args, frame.payload, frame.size); |
| if (dsize < 0) { |
| pn_string_format(transport->scratch, |
| "Error decoding frame: %s %s\n", pn_code(dsize), |
| pn_error_text(pn_data_error(args))); |
| pn_quote(transport->scratch, frame.payload, frame.size); |
| PN_LOG(&transport->logger, PN_SUBSYSTEM_AMQP, PN_LEVEL_ERROR, pn_string_get(transport->scratch)); |
| return dsize; |
| } |
| |
| uint8_t frame_type = frame.type; |
| uint16_t channel = frame.channel; |
| // XXX: assuming numeric - |
| // if we get a symbol we should map it to the numeric value and dispatch on that |
| uint64_t lcode; |
| bool scanned; |
| int e = pn_data_scan(args, "D?L.", &scanned, &lcode); |
| if (e) { |
| PN_LOG(&transport->logger, PN_SUBSYSTEM_AMQP, PN_LEVEL_ERROR, "Scan error"); |
| return e; |
| } |
| if (!scanned) { |
| PN_LOG(&transport->logger, PN_SUBSYSTEM_AMQP, PN_LEVEL_ERROR, "Error dispatching frame"); |
| return PN_ERR; |
| } |
| size_t payload_size = frame.size - dsize; |
| const char *payload_mem = payload_size ? frame.payload + dsize : NULL; |
| pn_bytes_t payload = {payload_size, payload_mem}; |
| |
| pn_do_trace(transport, channel, IN, args, payload_mem, payload_size); |
| |
| int err = pni_dispatch_action(transport, lcode, frame_type, channel, args, &payload); |
| |
| pn_data_clear(args); |
| |
| return err; |
| } |
| |
| ssize_t pn_dispatcher_input(pn_transport_t *transport, const char *bytes, size_t available, bool batch, bool *halt) |
| { |
| size_t read = 0; |
| |
| while (available && !*halt) { |
| pn_frame_t frame; |
| |
| ssize_t n = pn_read_frame(&frame, bytes + read, available, transport->local_max_frame); |
| if (n > 0) { |
| read += n; |
| available -= n; |
| transport->input_frames_ct += 1; |
| int e = pni_dispatch_frame(transport, transport->args, frame); |
| if (e) return e; |
| } else if (n < 0) { |
| pn_do_error(transport, "amqp:connection:framing-error", "malformed frame"); |
| return n; |
| } else { |
| break; |
| } |
| |
| if (!batch) break; |
| } |
| |
| return read; |
| } |
| |
| ssize_t pn_dispatcher_output(pn_transport_t *transport, char *bytes, size_t size) |
| { |
| int n = pn_buffer_get(transport->output_buffer, 0, size, bytes); |
| pn_buffer_trim(transport->output_buffer, n, 0); |
| // XXX: need to check for errors |
| return n; |
| } |