From e7ddf8788f1eb9da7351d21a19c2c53228aac164 Mon Sep 17 00:00:00 2001
From: naruse <naruse@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 31 Aug 2017 08:29:38 +0000
Subject: Add Socket::Ifaddr.vhid on supported platforms [Feature #13803]

patched by Alan Somers

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59702 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/socket/ifaddr.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'ext/socket/ifaddr.c')

diff --git a/ext/socket/ifaddr.c b/ext/socket/ifaddr.c
index a954163369..4e2fc065c0 100644
--- a/ext/socket/ifaddr.c
+++ b/ext/socket/ifaddr.c
@@ -256,6 +256,27 @@ ifaddr_dstaddr(VALUE self)
     return Qnil;
 }
 
+#ifdef HAVE_STRUCT_IF_DATA_IFI_VHID
+/*
+ * call-seq:
+ *   ifaddr.vhid => Integer
+ *
+ * Returns the vhid address of _ifaddr_.
+ * nil is returned if there is no vhid
+ */
+
+static VALUE
+ifaddr_vhid(VALUE self)
+{
+    rb_ifaddr_t *rifaddr = get_ifaddr(self);
+    struct ifaddrs *ifa = rifaddr->ifaddr;
+    if (ifa->ifa_data)
+        return (INT2FIX(((struct if_data*)ifa->ifa_data)->ifi_vhid));
+    else
+        return Qnil;
+}
+#endif
+
 static void
 ifaddr_inspect_flags(ifa_flags_t flags, VALUE result)
 {
@@ -453,6 +474,9 @@ rsock_init_sockifaddr(void)
     rb_define_method(rb_cSockIfaddr, "netmask", ifaddr_netmask, 0);
     rb_define_method(rb_cSockIfaddr, "broadaddr", ifaddr_broadaddr, 0);
     rb_define_method(rb_cSockIfaddr, "dstaddr", ifaddr_dstaddr, 0);
+#ifdef HAVE_STRUCT_IF_DATA_IFI_VHID
+    rb_define_method(rb_cSockIfaddr, "vhid", ifaddr_vhid, 0);
+#endif
 #endif
 
     rb_define_singleton_method(rb_cSocket, "getifaddrs", socket_s_getifaddrs, 0);
-- 
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