Hook network protocols

grub-core/Makefile.am

@@ -74,6 +74,7 @@ KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/term.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/time.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/mm_private.h
 KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/boot.h
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/net.h
 
 if COND_i386_pc
 KERNEL_HEADER_FILES += $(top_builddir)/include/grub/machine/memory.h

grub-core/commands/net.c

@@ -269,6 +269,37 @@ grub_cmd_addroute (struct grub_command *cmd __attribute__ ((unused)),
   return GRUB_ERR_NONE;
 }
 
+grub_net_app_level_t grub_net_app_level_list;
+
+static grub_net_t
+grub_net_open_real (const char *name)
+{
+  const char *comma = grub_strchr (name, ',');
+  grub_net_app_level_t proto;
+
+  if (!comma)
+    comma = name + grub_strlen (name);
+  FOR_NET_APP_LEVEL (proto)
+  {
+    if (comma - name == (grub_ssize_t) grub_strlen (proto->name)
+	&& grub_memcmp (proto->name, name, comma - name) == 0)
+      {
+	grub_net_t ret = grub_malloc (sizeof (*ret));
+	if (!ret)
+	  return NULL;
+	ret->protocol = proto;
+	ret->name = grub_strdup (name);
+	if (!ret->name)
+	  {
+	    grub_free (ret);
+	    return NULL;
+	  }
+	return ret;
+      }
+  }
+  return NULL;
+}
+
 static grub_command_t cmd_addaddr, cmd_deladdr, cmd_addroute, cmd_delroute;
 
 GRUB_MOD_INIT(net)
@@ -285,6 +316,7 @@ GRUB_MOD_INIT(net)
   cmd_delroute = grub_register_command ("net_del_route", grub_cmd_delroute,
 					"SHORTNAME",
 					N_("Delete a network route."));
+  grub_net_open = grub_net_open_real;
 }
 
 GRUB_MOD_FINI(net)
@@ -293,4 +325,5 @@ GRUB_MOD_FINI(net)
   grub_unregister_command (cmd_deladdr);
   grub_unregister_command (cmd_addroute);
   grub_unregister_command (cmd_delroute);
+  grub_net_open = NULL;
 }

grub-core/kern/device.c

@@ -26,6 +26,8 @@
 #include <grub/env.h>
 #include <grub/partition.h>
 
+grub_net_t (*grub_net_open) (const char *name) = NULL;
+
 grub_device_t
 grub_device_open (const char *name)
 {
@@ -46,15 +48,16 @@ grub_device_open (const char *name)
   if (! dev)
     goto fail;
 
+  dev->net = NULL;
   /* Try to open a disk.  */
-  disk = grub_disk_open (name);
-  if (! disk)
-    goto fail;
+  dev->disk = grub_disk_open (name);
+  if (dev->disk)
+    return dev;
+  if (grub_net_open)
+    dev->net = grub_net_open (name); 
 
-  dev->disk = disk;
-  dev->net = 0;	/* FIXME */
-
-  return dev;
+  if (dev->net)
+    return dev;
 
  fail:
   if (disk)
@@ -71,6 +74,12 @@ grub_device_close (grub_device_t device)
   if (device->disk)
     grub_disk_close (device->disk);
 
+  if (device->net)
+    {
+      grub_free (device->net->name);
+      grub_free (device->net);
+    }
+
   grub_free (device);
 
   return grub_errno;

grub-core/kern/fs.c

@@ -95,7 +95,7 @@ grub_fs_probe (grub_device_t device)
 	}
     }
   else if (device->net)
-    return device->net->fs;
+    return device->net->protocol;
 
   grub_error (GRUB_ERR_UNKNOWN_FS, "unknown filesystem");
   return 0;

include/grub/device.h

@@ -24,12 +24,7 @@
 #include <grub/err.h>
 
 struct grub_disk;
-struct grub_fs;
-struct grub_net
-{
-  char *name;
-  struct grub_fs *fs;
-};
+struct grub_net;
 
 struct grub_device
 {

include/grub/net.h

@@ -22,6 +22,17 @@
 #include <grub/types.h>
 #include <grub/err.h>
 #include <grub/list.h>
+#include <grub/fs.h>
+
+typedef struct grub_fs *grub_net_app_level_t;
+
+typedef struct grub_net
+{
+  char *name;
+  grub_net_app_level_t protocol;
+} *grub_net_t;
+
+extern grub_net_t (*EXPORT_VAR (grub_net_open)) (const char *name);
 
 struct grub_net_card;
 
@@ -46,7 +57,7 @@ struct grub_net_network_level_interface;
 typedef union grub_net_network_level_address
 {
   grub_uint32_t ipv4;
-} grub_net_network_level_netaddress_t;
+} grub_net_network_level_address_t;
 
 typedef union grub_net_network_level_netaddress
 {
@@ -54,7 +65,7 @@ typedef union grub_net_network_level_netaddress
     grub_uint32_t base;
     int masksize; 
   } ipv4;
-} grub_net_network_level_address_t;
+} grub_net_network_level_netaddress_t;
 
 typedef enum grub_network_level_protocol_id 
 {
@@ -163,6 +174,28 @@ grub_net_network_level_interface_unregister (struct grub_net_network_level_inter
 
 #define FOR_NET_NETWORK_LEVEL_INTERFACES(var) for (var = grub_net_network_level_interfaces; var; var = var->next)
 
+extern grub_net_app_level_t grub_net_app_level_list;
+
+#ifndef GRUB_LST_GENERATOR
+static inline void
+grub_net_app_level_register (grub_net_app_level_t proto)
+{
+  grub_list_push (GRUB_AS_LIST_P (&grub_net_app_level_list),
+		  GRUB_AS_LIST (proto));
+}
+#endif
+
+static inline void
+grub_net_app_level_unregister (grub_net_app_level_t proto)
+{
+  grub_list_remove (GRUB_AS_LIST_P (&grub_net_app_level_list),
+		    GRUB_AS_LIST (proto));
+}
+
+#define FOR_NET_APP_LEVEL(var) FOR_LIST_ELEMENTS((var), \
+						 (grub_net_app_level_list))
+
+
 extern struct grub_net_route *grub_net_routes;
 
 static inline void