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From 95329b0fbbbd6c7258c275a27ed904bdae11caad Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Tue, 7 May 2013 12:05:36 +0200
Subject: [PATCH 437/482] 	New variables 'net_default_*' to determine
 MAC/IP of default interface.

---
 ChangeLog             |  4 +++
 grub-core/net/bootp.c |  3 +++
 grub-core/net/net.c   | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 75 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 67b4c6f..cbd5d97 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 2013-05-07  Vladimir Serbinenko  <phcoder@gmail.com>
 
+	New variables 'net_default_*' to determine MAC/IP of default interface.
+
+2013-05-07  Vladimir Serbinenko  <phcoder@gmail.com>
+
 	* tests/gettext_strings_test.in: A test to check for strings not
 	marked for translation.
 
diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index 33f860a..c8ef4d6 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -211,6 +211,9 @@ grub_net_configure_by_dhcp_ack (const char *name,
       grub_print_error ();
     }
 
+  if (is_def)
+    grub_env_set ("net_default_interface", name);
+
   if (device && !*device && bp->server_ip)
     {
       *device = grub_xasprintf ("tftp,%d.%d.%d.%d",
diff --git a/grub-core/net/net.c b/grub-core/net/net.c
index aebbe4b..8ea6906 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -1,6 +1,6 @@
 /*
  *  GRUB  --  GRand Unified Bootloader
- *  Copyright (C) 2010,2011  Free Software Foundation, Inc.
+ *  Copyright (C) 2010,2011,2012,2013  Free Software Foundation, Inc.
  *
  *  GRUB is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -813,6 +813,69 @@ defserver_get_env (struct grub_env_var *var __attribute__ ((unused)),
   return grub_net_default_server ? : "";
 }
 
+static const char *
+defip_get_env (struct grub_env_var *var __attribute__ ((unused)),
+	       const char *val __attribute__ ((unused)))
+{
+  const char *intf = grub_env_get ("net_default_interface");
+  const char *ret = NULL;
+  if (intf)
+    {
+      char *buf = grub_xasprintf ("net_%s_ip", intf);
+      if (buf)
+	ret = grub_env_get (buf);
+      grub_free (buf);
+    }
+  return ret;
+}
+
+static char *
+defip_set_env (struct grub_env_var *var __attribute__ ((unused)),
+	       const char *val)
+{
+  const char *intf = grub_env_get ("net_default_interface");
+  if (intf)
+    {
+      char *buf = grub_xasprintf ("net_%s_ip", intf);
+      if (buf)
+	grub_env_set (buf, val);
+      grub_free (buf);
+    }
+  return NULL;
+}
+
+
+static const char *
+defmac_get_env (struct grub_env_var *var __attribute__ ((unused)),
+	       const char *val __attribute__ ((unused)))
+{
+  const char *intf = grub_env_get ("net_default_interface");
+  const char *ret = NULL;
+  if (intf)
+    {
+      char *buf = grub_xasprintf ("net_%s_mac", intf);
+      if (buf)
+	ret = grub_env_get (buf);
+      grub_free (buf);
+    }
+  return ret;
+}
+
+static char *
+defmac_set_env (struct grub_env_var *var __attribute__ ((unused)),
+	       const char *val)
+{
+  const char *intf = grub_env_get ("net_default_interface");
+  if (intf)
+    {
+      char *buf = grub_xasprintf ("net_%s_mac", intf);
+      if (buf)
+	grub_env_set (buf, val);
+      grub_free (buf);
+    }
+  return NULL;
+}
+
 
 static void
 grub_net_network_level_interface_register (struct grub_net_network_level_interface *inter)
@@ -1560,6 +1623,10 @@ GRUB_MOD_INIT(net)
 			       defserver_set_env);
   grub_register_variable_hook ("pxe_default_server", defserver_get_env,
 			       defserver_set_env);
+  grub_register_variable_hook ("net_default_ip", defip_get_env,
+			       defip_set_env);
+  grub_register_variable_hook ("net_default_mac", defmac_get_env,
+			       defmac_set_env);
 
   cmd_addaddr = grub_register_command ("net_add_addr", grub_cmd_addaddr,
 					/* TRANSLATORS: HWADDRESS stands for
-- 
1.8.2.1