153 lines
3.9 KiB
C
153 lines
3.9 KiB
C
/*
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* address.h -- representation of network addresses
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*
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* Copyright (C) 2010-2011,2015-2016 Olaf Bergmann <bergmann@tzi.org>
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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 address.h
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* @brief Representation of network addresses
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*/
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#ifndef _COAP_ADDRESS_H_
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#define _COAP_ADDRESS_H_
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#include <assert.h>
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#include <stdint.h>
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#include <string.h>
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#include <sys/types.h>
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#include "libcoap.h"
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#ifdef WITH_LWIP
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#include <lwip/ip_addr.h>
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typedef struct coap_address_t {
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uint16_t port;
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ip_addr_t addr;
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} coap_address_t;
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#define _coap_address_equals_impl(A, B) (!!ip_addr_cmp(&(A)->addr,&(B)->addr))
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#define _coap_address_isany_impl(A) ip_addr_isany(&(A)->addr)
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#define _coap_is_mcast_impl(Address) ip_addr_ismulticast(&(Address)->addr)
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#endif /* WITH_LWIP */
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#ifdef WITH_CONTIKI
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#include "uip.h"
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typedef struct coap_address_t {
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uip_ipaddr_t addr;
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unsigned short port;
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} coap_address_t;
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#define _coap_address_equals_impl(A,B) \
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((A)->port == (B)->port \
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&& uip_ipaddr_cmp(&((A)->addr),&((B)->addr)))
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/** @todo implementation of _coap_address_isany_impl() for Contiki */
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#define _coap_address_isany_impl(A) 0
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#define _coap_is_mcast_impl(Address) uip_is_addr_mcast(&((Address)->addr))
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#endif /* WITH_CONTIKI */
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#ifdef WITH_POSIX
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/** multi-purpose address abstraction */
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typedef struct coap_address_t {
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socklen_t size; /**< size of addr */
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union {
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struct sockaddr sa;
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struct sockaddr_storage st;
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struct sockaddr_in sin;
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struct sockaddr_in6 sin6;
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} addr;
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} coap_address_t;
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/**
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* Compares given address objects @p a and @p b. This function returns @c 1 if
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* addresses are equal, @c 0 otherwise. The parameters @p a and @p b must not be
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* @c NULL;
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*/
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int coap_address_equals(const coap_address_t *a, const coap_address_t *b);
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static inline int
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_coap_address_isany_impl(const coap_address_t *a) {
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/* need to compare only relevant parts of sockaddr_in6 */
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switch (a->addr.sa.sa_family) {
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case AF_INET:
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return a->addr.sin.sin_addr.s_addr == INADDR_ANY;
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case AF_INET6:
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return memcmp(&in6addr_any,
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&a->addr.sin6.sin6_addr,
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sizeof(in6addr_any)) == 0;
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default:
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;
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}
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return 0;
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}
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#endif /* WITH_POSIX */
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/**
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* Resets the given coap_address_t object @p addr to its default values. In
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* particular, the member size must be initialized to the available size for
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* storing addresses.
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*
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* @param addr The coap_address_t object to initialize.
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*/
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static inline void
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coap_address_init(coap_address_t *addr) {
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assert(addr);
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memset(addr, 0, sizeof(coap_address_t));
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#ifdef WITH_POSIX
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/* lwip and Contiki have constant address sizes and doesn't need the .size part */
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addr->size = sizeof(addr->addr);
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#endif
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}
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#ifndef WITH_POSIX
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/**
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* Compares given address objects @p a and @p b. This function returns @c 1 if
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* addresses are equal, @c 0 otherwise. The parameters @p a and @p b must not be
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* @c NULL;
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*/
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static inline int
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coap_address_equals(const coap_address_t *a, const coap_address_t *b) {
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assert(a); assert(b);
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return _coap_address_equals_impl(a, b);
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}
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#endif
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/**
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* Checks if given address object @p a denotes the wildcard address. This
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* function returns @c 1 if this is the case, @c 0 otherwise. The parameters @p
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* a must not be @c NULL;
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*/
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static inline int
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coap_address_isany(const coap_address_t *a) {
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assert(a);
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return _coap_address_isany_impl(a);
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}
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#ifdef WITH_POSIX
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/**
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* Checks if given address @p a denotes a multicast address. This function
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* returns @c 1 if @p a is multicast, @c 0 otherwise.
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*/
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int coap_is_mcast(const coap_address_t *a);
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#else /* WITH_POSIX */
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/**
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* Checks if given address @p a denotes a multicast address. This function
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* returns @c 1 if @p a is multicast, @c 0 otherwise.
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*/
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static inline int
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coap_is_mcast(const coap_address_t *a) {
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return a && _coap_is_mcast_impl(a);
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}
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#endif /* WITH_POSIX */
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#endif /* _COAP_ADDRESS_H_ */
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