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185 lines
5.4 KiB
185 lines
5.4 KiB
//
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// Created by MightyPork on 2017/12/19.
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//
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#include <malloc.h>
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#include <assert.h>
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#include "utils/payload_parser.h"
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#include "utils/payload_builder.h"
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#define GEX_H // to allow including other headers
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#include "gex_defines.h"
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#include "gex_message_types.h"
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#include "gex_unit.h"
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#include "gex_internal.h"
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/**
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* Low level query
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*
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* @param unit - GEX unit to address. The unit is available in userdata1 of the response message, if any
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* @param cmd - command byte, or TYPE if raw query is used
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* @param payload - payload buffer
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* @param len - payload length
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* @param lst - TF listener to handle the response, can be NULL
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* @param userdata2 userdata2 argument for the TF listener's message
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*/
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static void GEX_LL_Query(GexUnit *unit, uint8_t cmd,
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const uint8_t *payload, uint32_t len,
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GexSession session, bool is_reply,
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TF_Listener lst, void *userdata2,
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bool raw_pld)
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{
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assert(unit != NULL);
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assert(unit->gex != NULL);
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GexClient *gex = unit->gex;
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uint8_t callsign = 0;
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uint8_t *pld = NULL;
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if (!raw_pld) {
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callsign = unit->callsign;
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assert(callsign != 0);
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pld = malloc(len + 2);
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} else {
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pld = malloc(len);
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}
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assert(pld != NULL);
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{
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if (!raw_pld) {
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// prefix the actual payload with the callsign and command bytes.
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// TODO provide TF API for sending the payload externally in smaller chunks? Will avoid the malloc here
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pld[0] = callsign;
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pld[1] = cmd;
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memcpy(pld + 2, payload, len);
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} else {
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memcpy(pld, payload, len);
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}
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TF_Msg msg;
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TF_ClearMsg(&msg);
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msg.type = (raw_pld ? cmd : (uint8_t) MSG_UNIT_REQUEST);
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msg.data = pld;
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msg.len = (TF_LEN) (len + (raw_pld?0:2));
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msg.userdata = unit;
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msg.userdata2 = userdata2;
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msg.frame_id = session;
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msg.is_response = is_reply; // This ensures the frame_id is not re-generated
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TF_Query(gex->tf, &msg, lst, 0);
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}
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free(pld);
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}
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/** Send with no listener, don't wait for response */
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void GEX_Send(GexUnit *unit, uint8_t cmd, const uint8_t *payload, uint32_t len)
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{
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assert(unit != NULL);
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assert(unit->gex != NULL);
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GEX_LL_Query(unit, cmd, payload, len, 0, false, NULL, NULL, false);
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}
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/** Send with no listener, don't wait for response */
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void GEX_SendEx(GexUnit *unit, uint8_t cmd,
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const uint8_t *payload, uint32_t len,
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GexSession session, bool is_reply, bool raw_pld)
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{
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assert(unit != NULL);
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assert(unit->gex != NULL);
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GEX_LL_Query(unit, cmd, payload, len, session, is_reply, NULL, NULL, raw_pld);
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}
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/** listener for the synchronous query functionality */
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static TF_Result sync_query_lst(TinyFrame *tf, TF_Msg *msg)
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{
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GexClient *gex = tf->userdata;
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assert(gex != NULL);
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// clone the message
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gex->squery_msg.len = msg->len;
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gex->squery_msg.unit = msg->userdata;
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gex->squery_msg.type = msg->type;
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gex->squery_msg.session = msg->frame_id;
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// clone the buffer
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if (msg->len > 0) memcpy(gex->squery_buffer, msg->data, msg->len);
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// re-link the buffer
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gex->squery_msg.payload = gex->squery_buffer;
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gex->squery_ok = true;
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return TF_CLOSE;
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}
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/** Static query */
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GexMsg GEX_QueryEx(GexUnit *unit, uint8_t cmd,
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const uint8_t *payload, uint32_t len,
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GexSession session, bool is_reply,
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bool raw_pld) // FIXME this is horrible, split to multiple functions or use a struct
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{
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assert(unit != NULL);
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assert(unit->gex != NULL);
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GexClient *gex = unit->gex;
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gex->squery_ok = false;
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// Default response that will be used if nothing is received
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gex->squery_msg.unit = unit;
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gex->squery_msg.type = MSG_ERROR;
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gex->squery_msg.session = 0;
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sprintf((char *) gex->squery_buffer, "TIMEOUT");
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gex->squery_msg.len = (uint32_t) strlen("TIMEOUT");
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gex->squery_msg.payload = gex->squery_buffer;
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GEX_LL_Query(unit, cmd, payload, len, session, is_reply, sync_query_lst, NULL, raw_pld);
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GEX_Poll(gex);
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if (!gex->squery_ok) {
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fprintf(stderr, "No response to query of unit %s!\n", unit->name);
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}
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return gex->squery_msg;
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}
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/** Static query */
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GexMsg GEX_Query(GexUnit *unit, uint8_t cmd, const uint8_t *payload, uint32_t len)
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{
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assert(unit != NULL);
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assert(unit->gex != NULL);
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return GEX_QueryEx(unit, cmd, payload, len, 0, false, false);
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}
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/** listener for the synchronous query functionality */
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static TF_Result async_query_lst(TinyFrame *tf, TF_Msg *msg)
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{
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(void)tf;
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GexMsg gexMsg;
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// clone the message
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gexMsg.len = msg->len;
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gexMsg.unit = msg->userdata; // Unit passed to "userdata" in GEX_LL_Query
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gexMsg.type = msg->type;
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gexMsg.session = msg->frame_id;
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gexMsg.payload = (uint8_t *) msg->data;
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assert( gexMsg.unit != NULL);
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GexEventListener lst = msg->userdata2;
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assert(lst != NULL);
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lst(gexMsg);
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return TF_CLOSE;
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}
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/** Sync query, without poll */
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void GEX_QueryAsync(GexUnit *unit, uint8_t cmd, const uint8_t *payload, uint32_t len, GexEventListener lst)
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{
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assert(unit != NULL);
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assert(unit->gex != NULL);
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// Async query does not poll, instead the user listener is attached to the message
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GEX_LL_Query(unit, cmd, payload, len, 0, false, async_query_lst, lst, false);
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}
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