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59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#ifndef FLOWCONTROL_H
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#define FLOWCONTROL_H
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#include <stdint.h>
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#include <vtimer.h>
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#include "semaphore.h"
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#include "sixlowip.h"
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#include "sixlowborder.h"
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#include "bordermultiplex.h"
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/* packet types for flowcontrol */
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#define BORDER_PACKET_ACK_TYPE 1
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/* configuration types for flowcontrol */
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#define BORDER_CONF_SYN 0
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#define BORDER_CONF_SYNACK 1
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#define BORDER_SWS 1
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#define BORDER_RWS 1
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#define BORDER_SL_TIMEOUT 500 // microseconds, maybe smaller
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#define SENDING_SLOT_STACK_SIZE (256)
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typedef struct flowcontrol_stat_t {
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/* Sender state */
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uint8_t last_ack;
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uint8_t last_frame;
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sem_t send_win_not_full;
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struct send_slot {
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vtimer_t timeout;
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uint8_t frame[BORDER_BUFFER_SIZE];
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size_t frame_len;
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} send_win[BORDER_SWS];
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/* Receiver state */
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uint8_t next_exp;
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struct recv_slot {
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int8_t received;
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uint8_t frame[BORDER_BUFFER_SIZE];
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size_t frame_len;
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} recv_win[BORDER_RWS];
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} flowcontrol_stat_t;
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typedef struct __attribute__ ((packed)) border_syn_packet_t {
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uint8_t empty;
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uint8_t type;
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uint8_t next_seq_num;
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uint8_t conftype;
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uint8_t next_exp;
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ipv6_addr_t addr;
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} border_syn_packet_t;
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ipv6_addr_t flowcontrol_init();
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void flowcontrol_send_over_uart(border_packet_t *packet, int len);
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void flowcontrol_deliver_from_uart(border_packet_t *packet, int len);
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#endif /* FLOWCONTROL_H*/
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