utilities: Avoid inclusion of network headers

No-OS applications most likely don't have <net/if.h>. This header was
included from dns_sd.h, which was included in utilities.c.

utilities.c only needed dns_sd.h for the FQDN_LEN macro; so move this
macro to network.h instead, which does not include any non-standard
headers.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>

dns_sd.h

@@ -24,7 +24,6 @@
 
 /* IPv6 Max = 4*8 + 7 + 1 for '%' + interface length */
 #define DNS_SD_ADDRESS_STR_MAX (40 + IF_NAMESIZE)
-#define FQDN_LEN (255)              /* RFC 1035 */
 
 /* MacOS doesn't include ENOMEDIUM (No medium found) like Linux does */
 #ifndef ENOMEDIUM

dns_sd_bonjour.c

@@ -8,6 +8,7 @@
  */
 
 #include "dns_sd.h"
+#include "network.h" // for FQDN_LEN
 
 #include <arpa/inet.h>
 #include <netinet/in.h>

network.h

@@ -12,6 +12,8 @@
 
 #include <stdbool.h>
 
+#define FQDN_LEN (255)              /* RFC 1035 */
+
 struct iio_context_params;
 struct iio_context_pdata;
 struct addrinfo;

utilities.c

@@ -9,9 +9,9 @@
 /* Force the XSI version of strerror_r */
 #undef _GNU_SOURCE
 
-#include "dns_sd.h"
 #include "iio-config.h"
 #include "iio-private.h"
+#include "network.h" // for FQDN_LEN
 
 #include <errno.h>
 #include <iio/iio-debug.h>