coap_address.c: Make coap_is_bcast() more generic for different builds

CMakeLists.txt

@@ -235,6 +235,7 @@ check_include_file(strings.h HAVE_STRINGS_H)
 check_include_file(string.h HAVE_STRING_H)
 check_include_file(sys/sysctl.h HAVE_SYS_SYSCTL_H)
 check_include_file(net/if.h HAVE_NET_IF_H)
+check_include_file(ifaddrs.h HAVE_IFADDRS_H)
 check_include_file(netinet/in.h HAVE_NETINET_IN_H)
 check_include_file(sys/epoll.h HAVE_EPOLL_H)
 check_include_file(sys/timerfd.h HAVE_TIMERFD_H)

configure.ac

@@ -925,7 +925,7 @@ fi
 AC_CHECK_HEADERS([assert.h arpa/inet.h limits.h netdb.h netinet/in.h \
                   pthread.h errno.h winsock2.h ws2tcpip.h \
                   stdlib.h string.h strings.h sys/socket.h sys/time.h \
-                  time.h unistd.h sys/unistd.h sys/ioctl.h net/if.h])
+                  time.h unistd.h sys/unistd.h sys/ioctl.h net/if.h ifaddrs.h])
 
 # For epoll, need two headers (sys/epoll.h sys/timerfd.h), but set up one #define
 AC_CHECK_HEADER([sys/epoll.h])

src/coap_address.c

@@ -25,6 +25,12 @@
 #ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
 #endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+#ifdef HAVE_IFADDRS_H
+#include <ifaddrs.h>
+#endif
 #ifdef HAVE_WS2TCPIP_H
 #include <ws2tcpip.h>
 #endif
@@ -139,8 +145,6 @@ coap_is_mcast(const coap_address_t *a) {
   return 0;
 }
 
-#if !defined(WIN32) && !defined(__ZEPHYR__)
-
 #ifndef COAP_BCST_CNT
 #define COAP_BCST_CNT 15
 #endif /* COAP_BCST_CNT */
@@ -150,25 +154,20 @@ coap_is_mcast(const coap_address_t *a) {
 #define COAP_BCST_REFRESH_SECS 30
 #endif /* COAP_BCST_REFRESH_SECS */
 
-#if COAP_IPV4_SUPPORT && !defined(ESPIDF_VERSION)
+#if COAP_IPV4_SUPPORT && defined(HAVE_IFADDRS_H)
 static int bcst_cnt = -1;
 static coap_tick_t last_refresh;
 static struct in_addr b_ipv4[COAP_BCST_CNT];
-#endif /* COAP_IPV4_SUPPORT && ! ESPIDF_VERSION */
-
-#if !defined(ESPIDF_VERSION)
-#include <net/if.h>
-#include <ifaddrs.h>
-#endif /* ! ESPIDF_VERSION */
+#endif /* COAP_IPV4_SUPPORT && HAVE_IFADDRS_H */
 
 int
 coap_is_bcast(const coap_address_t *a) {
 #if COAP_IPV4_SUPPORT
   struct in_addr ipv4;
-#if !defined(ESPIDF_VERSION)
+#if defined(HAVE_IFADDRS_H)
   int i;
   coap_tick_t now;
-#endif /* ! ESPIDF_VERSION */
+#endif /* HAVE_IFADDRS_H */
 #endif /* COAP_IPV4_SUPPORT */
 
   if (!a)
@@ -195,10 +194,13 @@ coap_is_bcast(const coap_address_t *a) {
     return 0;
   }
 #if COAP_IPV4_SUPPORT
+#ifndef INADDR_BROADCAST
+#define INADDR_BROADCAST ((uint32_t)0xffffffffUL)
+#endif /* !INADDR_BROADCAST */
   if (ipv4.s_addr == INADDR_BROADCAST)
     return 1;
 
-#if !defined(ESPIDF_VERSION)
+#if defined(HAVE_IFADDRS_H)
   coap_ticks(&now);
   if (bcst_cnt == -1 ||
       (now - last_refresh) > (COAP_BCST_REFRESH_SECS * COAP_TICKS_PER_SECOND)) {
@@ -230,17 +232,10 @@ coap_is_bcast(const coap_address_t *a) {
     if (ipv4.s_addr == b_ipv4[i].s_addr)
       return 1;
   }
-#endif /* ESPIDF_VERSION */
+#endif /* HAVE_IFADDRS_H */
   return 0;
 #endif /* COAP_IPV4_SUPPORT */
 }
-#else /* WIN32 || __ZEPHYR__ */
-int
-coap_is_bcast(const coap_address_t *a) {
-  (void)a;
-  return 0;
-}
-#endif /* WIN32 || __ZEPHYR__ */
 
 #endif /* !defined(WITH_CONTIKI) && !defined(WITH_LWIP) */