72 lines
2.1 KiB
C
72 lines
2.1 KiB
C
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#include <string.h>
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#include "coap_io.h"
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#include "node.h"
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#include "espconn.h"
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#include "coap_timer.h"
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extern coap_queue_t *gQueue;
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/* releases space allocated by PDU if free_pdu is set */
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coap_tid_t coap_send(struct espconn *pesp_conn, coap_pdu_t *pdu) {
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coap_tid_t id = COAP_INVALID_TID;
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uint32_t ip = 0, port = 0;
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if ( !pesp_conn || !pdu )
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return id;
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espconn_sent(pesp_conn, (unsigned char *)(pdu->msg.p), pdu->msg.len);
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if(pesp_conn->type == ESPCONN_TCP){
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memcpy(&ip, pesp_conn->proto.tcp->remote_ip, sizeof(ip));
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port = pesp_conn->proto.tcp->remote_port;
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}else{
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memcpy(&ip, pesp_conn->proto.udp->remote_ip, sizeof(ip));
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port = pesp_conn->proto.udp->remote_port;
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}
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coap_transaction_id(ip, port, pdu->pkt, &id);
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return id;
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}
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coap_tid_t coap_send_confirmed(struct espconn *pesp_conn, coap_pdu_t *pdu) {
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coap_queue_t *node;
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coap_tick_t diff;
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uint32_t r;
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node = coap_new_node();
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if (!node) {
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NODE_DBG("coap_send_confirmed: insufficient memory\n");
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return COAP_INVALID_TID;
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}
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node->retransmit_cnt = 0;
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node->id = coap_send(pesp_conn, pdu);
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if (COAP_INVALID_TID == node->id) {
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NODE_DBG("coap_send_confirmed: error sending pdu\n");
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coap_free_node(node);
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return COAP_INVALID_TID;
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}
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r = rand();
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/* add randomized RESPONSE_TIMEOUT to determine retransmission timeout */
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node->timeout = COAP_DEFAULT_RESPONSE_TIMEOUT * COAP_TICKS_PER_SECOND +
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(COAP_DEFAULT_RESPONSE_TIMEOUT >> 1) *
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((COAP_TICKS_PER_SECOND * (r & 0xFF)) >> 8);
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node->pconn = pesp_conn;
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node->pdu = pdu;
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/* Set timer for pdu retransmission. If this is the first element in
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* the retransmission queue, the base time is set to the current
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* time and the retransmission time is node->timeout. If there is
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* already an entry in the sendqueue, we must check if this node is
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* to be retransmitted earlier. Therefore, node->timeout is first
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* normalized to the timeout and then inserted into the queue with
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* an adjusted relative time.
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*/
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coap_timer_stop();
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coap_timer_update(&gQueue);
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node->t = node->timeout;
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coap_insert_node(&gQueue, node);
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coap_timer_start(&gQueue);
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return node->id;
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}
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