先占个位，获取文件链接，待完善:-)
三、runicast_send
//runicast_send(&c->c, receiver, MAX_TRANSMISSIONS);
int runicast_send(struct runicast_conn *c, const rimeaddr_t *receiver, uint8_t max_retransmissions) { int ret; if(runicast_is_transmitting(c)) { PRINTF("%d.%d: runicast: already transmitting\n", rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]); return 0; } packetbuf_set_attr(PACKETBUF_ATTR_RELIABLE, 1); packetbuf_set_attr(PACKETBUF_ATTR_PACKET_TYPE, PACKETBUF_ATTR_PACKET_TYPE_DATA); packetbuf_set_attr(PACKETBUF_ATTR_PACKET_ID, c->sndnxt); packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, 3); c->max_rxmit = max_retransmissions; c->rxmit = 0; c->is_tx = 1; RIMESTATS_ADD(reliabletx); PRINTF("%d.%d: runicast: sending packet %d\n", rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1], c->sndnxt); ret = stunicast_send_stubborn(&c->c, receiver, REXMIT_TIME); if(!ret) { c->is_tx = 0; } return ret; }
四、stunicast_send_stubborn
//stunicast_send_stubborn(&c->c, receiver, REXMIT_TIME)
int stunicast_send_stubborn(struct stunicast_conn *c, const rimeaddr_t *receiver, clock_time_t rxmittime) { if(c->buf != NULL) { queuebuf_free(c->buf); } c->buf = queuebuf_new_from_packetbuf(); if(c->buf == NULL) { return 0; } rimeaddr_copy(&c->receiver, receiver); ctimer_set(&c->t, rxmittime, send, c);
PRINTF("%d.%d: stunicast_send_stubborn to %d.%d\n", rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1], c->receiver.u8[0],c->receiver.u8[1]); unicast_send(&c->c, &c->receiver); /* if(c->u->sent != NULL) { c->u->sent(c); }*/ return 1; }
五、unicast_send
int unicast_send(struct unicast_conn *c, const rimeaddr_t *receiver) { PRINTF("%d.%d: unicast_send to %d.%d\n", rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1], receiver->u8[0], receiver->u8[1]); packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, receiver); return broadcast_send(&c->c); }
六、broadcast_send
int broadcast_send(struct broadcast_conn *c) { PRINTF("%d.%d: broadcast_send\n", rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1]); packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr); return abc_send(&c->c); }
int abc_send(struct abc_conn *c) { PRINTF("%d.%d: abc: abc_send on channel %d\n", rimeaddr_node_addr.u8[0],rimeaddr_node_addr.u8[1], c->channel.channelno); return rime_output(&c->channel); }
int rime_output(struct channel *c) { RIMESTATS_ADD(tx); if(chameleon_create(c)) { packetbuf_compact();
NETSTACK_MAC.send(packet_sent, c); return 1; } return 0; }
#ifndef NETSTACK_MAC #ifdef NETSTACK_CONF_MAC #define NETSTACK_MAC NETSTACK_CONF_MAC #else #define NETSTACK_MAC nullmac_driver #endif #endif
#ifndef NETSTACK_CONF_MAC #define NETSTACK_CONF_MAC csma_driver #endif
const struct mac_driver csma_driver = { "CSMA", init, send_packet, input_packet, on, off, channel_check_interval, };
/** * The structure of a MAC protocol driver in Contiki. */ struct mac_driver { char *name;
/** Initialize the MAC driver */ void (* init)(void);
/** Send a packet from the Rime buffer */ void (* send)(mac_callback_t sent_callback, void *ptr);
/** Callback for getting notified of incoming packet. */ void (* input)(void); /** Turn the MAC layer on. */ int (* on)(void);
/** Turn the MAC layer off. */ int (* off)(int keep_radio_on);
/** Returns the channel check interval, expressed in clock_time_t ticks. */ unsigned short (* channel_check_interval)(void); };