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78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/**
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* 6lowpan border router flow control
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*
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* Copyright (C) 2013 INRIA.
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*
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* This file subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* details.
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*
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* @ingroup sixlowpan
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* @{
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* @file flowcontrol.h
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* @brief data structs for border router flowcontrol
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* @author Martin Lenders <mlenders@inf.fu-berlin.de>
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* @author Oliver Hahm <oliver.hahm@inria.fr>
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* @}
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*/
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#ifndef _SIXLOWPAN_FLOWCONTROL_H
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#define _SIXLOWPAN_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 "ip.h"
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#include "border.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 (MINIMUM_STACK_SIZE + 256)
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typedef struct {
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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)) {
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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(void);
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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 /* _SIXLOWPAN_FLOWCONTROL_H*/
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