From 1ae38f7ba738c2adaaebc66576143f96cdd5e962 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Tue, 9 Jun 2015 10:59:42 +0200
Subject: [PATCH] ptp: Check for the actual API we use instead of just looking
 for __APPLE__

Should fix the build on FreeBSD, DragonFly and other BSDs.

https://bugzilla.gnome.org/show_bug.cgi?id=750530
---
 configure.ac                      | 38 ++++++++++++++++++++++++++++++++++++++
 libs/gst/helpers/gst-ptp-helper.c | 14 +++++++++-----
 2 files changed, 47 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index 71309c9..3717518 100644
--- a/configure.ac
+++ b/configure.ac
@@ -325,6 +325,44 @@ AC_PATH_PROG([SETCAP], [setcap], [no], [$PATH:/usr/bin:/bin:/usr/sbin:/sbin])
 if test "x$HAVE_PTP" = "xyes"; then
 AC_DEFINE(HAVE_PTP, 1, [PTP support available])
 
+AC_MSG_CHECKING([for SIOCGIFCONF, SIOCGIFFLAGS and SIOCGIFHWADDR])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+    [[
+        #include <sys/ioctl.h>
+        #include <net/if.h>
+    ]],
+    [[
+        struct ifreq ifr;
+        struct ifconf ifc;
+        ioctl(0, SIOCGIFCONF, &ifc);
+        ioctl(0, SIOCGIFFLAGS, &ifr);
+        ioctl(0, SIOCGIFHWADDR, &ifr);
+        int dummy = ifr.ifr_hwaddr.sa_data[0];
+    ]])], [
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE_SIOCGIFCONF_SIOCGIFFLAGS_SIOCGIFHWADDR, 1, [SIOCGIFCONF, SIOCGIFFLAGS and SIOCGIFHWADDR is available])
+    ], [
+        AC_MSG_RESULT(no)
+])
+
+AC_MSG_CHECKING([for getifaddrs() and AF_LINK])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+    [[
+        #include <ifaddrs.h>
+        #include <net/if.h>
+        #include <net/if_dl.h>
+    ]],
+    [[
+        struct ifaddrs *ifaddr;
+        getifaddrs(&ifaddr);
+        int dummy = (ifaddr->ifa_flags & IFF_LOOPBACK) && ifaddr->ifa_addr->sa_family != AF_LINK;
+    ]])], [
+        AC_MSG_RESULT(yes)
+        AC_DEFINE(HAVE_GETIFADDRS_AF_LINK, 1, [getifaddrs() and AF_LINK is available])
+    ], [
+        AC_MSG_RESULT(no)
+    ])
+
 AC_MSG_CHECKING([how to install gst-ptp-helper])
 if test "x$with_ptp_helper_permissions" = "xauto"; then
     if test "x$gst_ptp_have_cap" = "xyes" -a "x$SETCAP" != "xno"; then
diff --git a/libs/gst/helpers/gst-ptp-helper.c b/libs/gst/helpers/gst-ptp-helper.c
index 45a0206..6c753df 100644
--- a/libs/gst/helpers/gst-ptp-helper.c
+++ b/libs/gst/helpers/gst-ptp-helper.c
@@ -41,7 +41,7 @@
 #include <netinet/in.h>
 #include <string.h>
 
-#ifdef __APPLE__
+#ifdef HAVE_GETIFADDRS_AF_LINK
 #include <ifaddrs.h>
 #include <net/if_dl.h>
 #endif
@@ -240,7 +240,7 @@ setup_sockets (void)
 
   /* Probe all non-loopback interfaces */
   if (!ifaces) {
-#ifndef __APPLE__
+#if defined(HAVE_SIOCGIFCONF_SIOCGIFFLAGS_SIOCGIFHWADDR)
     struct ifreq ifr;
     struct ifconf ifc;
     gchar buf[8192];
@@ -269,7 +269,7 @@ setup_sockets (void)
           ifaces = probed_ifaces;
       }
     }
-#else
+#elif defined(HAVE_GETIFADDRS_AF_LINK)
     struct ifaddrs *ifaddr, *ifa;
 
     if (getifaddrs (&ifaddr) != -1) {
@@ -291,6 +291,8 @@ setup_sockets (void)
       g_ptr_array_add (arr, NULL);
       ifaces = probed_ifaces = (gchar **) g_ptr_array_free (arr, FALSE);
     }
+#else
+#warning "Implement something to list all network interfaces"
 #endif
   }
 
@@ -298,7 +300,7 @@ setup_sockets (void)
   if (clock_id == (guint64) - 1) {
     gboolean success = FALSE;
 
-#ifndef __APPLE__
+#if defined(HAVE_SIOCGIFCONF_SIOCGIFFLAGS_SIOCGIFHWADDR)
     struct ifreq ifr;
 
     if (ifaces) {
@@ -356,7 +358,7 @@ setup_sockets (void)
         }
       }
     }
-#else
+#elif defined(HAVE_GETIFADDRS_AF_LINK)
     struct ifaddrs *ifaddr, *ifa;
 
     if (getifaddrs (&ifaddr) != -1) {
@@ -405,6 +407,8 @@ setup_sockets (void)
 
       freeifaddrs (ifaddr);
     }
+#else
+#warning "Implement something to get MAC addresses of network interfaces"
 #endif
 
     if (!success) {
-- 
2.1.4