mirror of
https://github.com/obgm/libcoap.git
synced 2026-11-14 20:29:43 +03:00
Jon Shallow
2f25c950af
If a response packet is received that is badly formatted, invoke the nack handler (if defined) with COAP_NACK_BAD_RESPONSE so that the requestor knows there is an issue, rather than timing out. However, if the response packet is so badly formatted, or it is not possible to find the requesting packet, then this nack event will not trigger, but an event is triggered with COAP_EVENT_BAD_PACKET.
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
/*
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* coap_io.h -- Default network I/O functions for libcoap
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*
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* Copyright (C) 2012-2013,2022 Olaf Bergmann <bergmann@tzi.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* This file is part of the CoAP library libcoap. Please see README for terms
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* of use.
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*/
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/**
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* @file coap_io.h
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* @brief Default network I/O functions
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*/
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#ifndef COAP_IO_H_
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#define COAP_IO_H_
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#include <sys/types.h>
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#include "coap_address.h"
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#ifdef RIOT_VERSION
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#include "net/gnrc.h"
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#endif /* RIOT_VERSION */
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#ifndef COAP_RXBUFFER_SIZE
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#define COAP_RXBUFFER_SIZE 1472
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#endif /* COAP_RXBUFFER_SIZE */
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/*
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* It may may make sense to define this larger on busy systems
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* (lots of sessions, large number of which are active), by using
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* -DCOAP_MAX_EPOLL_EVENTS=nn at compile time.
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*/
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#ifndef COAP_MAX_EPOLL_EVENTS
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#define COAP_MAX_EPOLL_EVENTS 10
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#endif /* COAP_MAX_EPOLL_EVENTS */
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#ifdef _WIN32
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typedef SOCKET coap_fd_t;
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#define coap_closesocket closesocket
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#define COAP_SOCKET_ERROR SOCKET_ERROR
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#define COAP_INVALID_SOCKET INVALID_SOCKET
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#else
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typedef int coap_fd_t;
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#define coap_closesocket close
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#define COAP_SOCKET_ERROR (-1)
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#define COAP_INVALID_SOCKET (-1)
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#endif
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typedef uint16_t coap_socket_flags_t;
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typedef struct coap_addr_tuple_t {
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coap_address_t remote; /**< remote address and port */
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coap_address_t local; /**< local address and port */
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} coap_addr_tuple_t;
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const char *coap_socket_strerror( void );
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/**
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* Check whether TCP is available.
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*
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* @return @c 1 if support for TCP is enabled, or @c 0 otherwise.
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*/
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int coap_tcp_is_supported(void);
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typedef enum {
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COAP_NACK_TOO_MANY_RETRIES,
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COAP_NACK_NOT_DELIVERABLE,
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COAP_NACK_RST,
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COAP_NACK_TLS_FAILED,
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COAP_NACK_ICMP_ISSUE,
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COAP_NACK_BAD_RESPONSE
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} coap_nack_reason_t;
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#endif /* COAP_IO_H_ */
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