Ashley Mills / Mbed 2 deprecated tinydtls_test_ethernet

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Dependencies:   EthernetInterface mbed-rtos mbed tinydtls

Fork of tinydtls_test_ethernet by Ashley Mills

tinydtls/netq.h@0:6ae42a2aff75, 2013-10-09 (annotated)

Committer:
ashleymills
Date:
Wed Oct 09 14:48:52 2013 +0000
Revision:
0:6ae42a2aff75
Test program for mbed port of tinydtls

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ashleymills 0:6ae42a2aff75 1 /* netq.h -- Simple packet queue
ashleymills 0:6ae42a2aff75 2 *
ashleymills 0:6ae42a2aff75 3 * Copyright (C) 2010--2012 Olaf Bergmann <bergmann@tzi.org>
ashleymills 0:6ae42a2aff75 4 *
ashleymills 0:6ae42a2aff75 5 * This file is part of the library tinyDTLS. Please see the file
ashleymills 0:6ae42a2aff75 6 * LICENSE for terms of use.
ashleymills 0:6ae42a2aff75 7 */
ashleymills 0:6ae42a2aff75 8
ashleymills 0:6ae42a2aff75 9 #ifndef _NETQ_H_
ashleymills 0:6ae42a2aff75 10 #define _NETQ_H_
ashleymills 0:6ae42a2aff75 11
ashleymills 0:6ae42a2aff75 12 #include "config.h"
ashleymills 0:6ae42a2aff75 13 #include "global.h"
ashleymills 0:6ae42a2aff75 14 //#include "dtls.h"
ashleymills 0:6ae42a2aff75 15 #include "time.h"
ashleymills 0:6ae42a2aff75 16 #include "peer.h"
ashleymills 0:6ae42a2aff75 17
ashleymills 0:6ae42a2aff75 18 /**
ashleymills 0:6ae42a2aff75 19 * \defgroup netq Network Packet Queue
ashleymills 0:6ae42a2aff75 20 * The netq utility functions implement an ordered queue of data packets
ashleymills 0:6ae42a2aff75 21 * to send over the network and can also be used to queue received packets
ashleymills 0:6ae42a2aff75 22 * from the network.
ashleymills 0:6ae42a2aff75 23 * @{
ashleymills 0:6ae42a2aff75 24 */
ashleymills 0:6ae42a2aff75 25
ashleymills 0:6ae42a2aff75 26 #ifndef NETQ_MAXCNT
ashleymills 0:6ae42a2aff75 27 #define NETQ_MAXCNT 4 /**< maximum number of elements in netq structure */
ashleymills 0:6ae42a2aff75 28 #endif
ashleymills 0:6ae42a2aff75 29
ashleymills 0:6ae42a2aff75 30 /**
ashleymills 0:6ae42a2aff75 31 * Datagrams in the netq_t structure have a fixed maximum size of
ashleymills 0:6ae42a2aff75 32 * DTLS_MAX_BUF to simplify memory management on constrained nodes. */
ashleymills 0:6ae42a2aff75 33 typedef unsigned char netq_packet_t[DTLS_MAX_BUF];
ashleymills 0:6ae42a2aff75 34
ashleymills 0:6ae42a2aff75 35 typedef struct netq_t {
ashleymills 0:6ae42a2aff75 36 struct netq_t *next;
ashleymills 0:6ae42a2aff75 37
ashleymills 0:6ae42a2aff75 38 clock_time_t t; /**< when to send PDU for the next time */
ashleymills 0:6ae42a2aff75 39 unsigned char retransmit_cnt; /**< retransmission counter, will be removed when zero */
ashleymills 0:6ae42a2aff75 40 unsigned int timeout; /**< randomized timeout value */
ashleymills 0:6ae42a2aff75 41
ashleymills 0:6ae42a2aff75 42 dtls_peer_t *peer; /**< remote address */
ashleymills 0:6ae42a2aff75 43
ashleymills 0:6ae42a2aff75 44 size_t length; /**< actual length of data */
ashleymills 0:6ae42a2aff75 45 netq_packet_t data; /**< the datagram to send */
ashleymills 0:6ae42a2aff75 46 } netq_t;
ashleymills 0:6ae42a2aff75 47
ashleymills 0:6ae42a2aff75 48 /**
ashleymills 0:6ae42a2aff75 49 * Adds a node to the given queue, ordered by their time-stamp t.
ashleymills 0:6ae42a2aff75 50 * This function returns @c 0 on error, or non-zero if @p node has
ashleymills 0:6ae42a2aff75 51 * been added successfully.
ashleymills 0:6ae42a2aff75 52 *
ashleymills 0:6ae42a2aff75 53 * @param queue A pointer to the queue head where @p node will be added.
ashleymills 0:6ae42a2aff75 54 * @param node The new item to add.
ashleymills 0:6ae42a2aff75 55 * @return @c 0 on error, or non-zero if the new item was added.
ashleymills 0:6ae42a2aff75 56 */
ashleymills 0:6ae42a2aff75 57 int netq_insert_node(netq_t **queue, netq_t *node);
ashleymills 0:6ae42a2aff75 58
ashleymills 0:6ae42a2aff75 59 /** Destroys specified node and releases any memory that was allocated
ashleymills 0:6ae42a2aff75 60 * for the associated datagram. */
ashleymills 0:6ae42a2aff75 61 void netq_node_free(netq_t *node);
ashleymills 0:6ae42a2aff75 62
ashleymills 0:6ae42a2aff75 63 /** Removes all items from given queue and frees the allocated storage */
ashleymills 0:6ae42a2aff75 64 void netq_delete_all(netq_t *queue);
ashleymills 0:6ae42a2aff75 65
ashleymills 0:6ae42a2aff75 66 /** Creates a new node suitable for adding to a netq_t queue. */
ashleymills 0:6ae42a2aff75 67 netq_t *netq_node_new();
ashleymills 0:6ae42a2aff75 68
ashleymills 0:6ae42a2aff75 69 /**
ashleymills 0:6ae42a2aff75 70 * Returns a pointer to the first item in given queue or NULL if
ashleymills 0:6ae42a2aff75 71 * empty.
ashleymills 0:6ae42a2aff75 72 */
ashleymills 0:6ae42a2aff75 73 netq_t *netq_head(netq_t **queue);
ashleymills 0:6ae42a2aff75 74
ashleymills 0:6ae42a2aff75 75 /**
ashleymills 0:6ae42a2aff75 76 * Removes the first item in given queue and returns a pointer to the
ashleymills 0:6ae42a2aff75 77 * removed element. If queue is empty when netq_pop_first() is called,
ashleymills 0:6ae42a2aff75 78 * this function returns NULL.
ashleymills 0:6ae42a2aff75 79 */
ashleymills 0:6ae42a2aff75 80 netq_t *netq_pop_first(netq_t **queue);
ashleymills 0:6ae42a2aff75 81
ashleymills 0:6ae42a2aff75 82 /**@}*/
ashleymills 0:6ae42a2aff75 83
ashleymills 0:6ae42a2aff75 84 #endif /* _NETQ_H_ */