From 1fd8a7701291a47e189eaa87d2cc5f06290c4c59 Mon Sep 17 00:00:00 2001
From: Martine Lenders <m.lenders@fu-berlin.de>
Date: Thu, 7 Jul 2016 21:38:08 +0200
Subject: [PATCH] cpu/native: adapt start-up and auto-init for multiple
 netdev2_tap

---
 cpu/native/include/netdev2_tap_params.h     | 50 +++++++++++++++++++++
 cpu/native/startup.c                        | 15 ++++---
 sys/auto_init/netif/auto_init_netdev2_tap.c | 35 +++++++--------
 3 files changed, 73 insertions(+), 27 deletions(-)
 create mode 100644 cpu/native/include/netdev2_tap_params.h

diff --git a/cpu/native/include/netdev2_tap_params.h b/cpu/native/include/netdev2_tap_params.h
new file mode 100644
index 0000000000000..7a22f6d07c0c6
--- /dev/null
+++ b/cpu/native/include/netdev2_tap_params.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2016 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     netdev2
+ * @brief
+ * @{
+ *
+ * @file
+ * @brief       Default configuration for the netdev2_tap driver
+ *
+ * @author  Martine Lenders <m.lenders@fu-berlin.de>
+ */
+#ifndef NETDEV2_TAP_PARAMS_H_
+#define NETDEV2_TAP_PARAMS_H_
+
+#include "netdev2_tap.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief   Number of allocated parameters at @ref netdev2_tap_params
+ *
+ * @note    This was decided to only be configurable on compile-time to be
+ *          more similar to actual boards
+ */
+#ifndef NETDEV2_TAP_MAX
+#define NETDEV2_TAP_MAX             (1)
+#endif
+
+/**
+ * @brief   Configuration parameters for @ref netdev2_tap_t
+ *
+ * @note    This variable is set on native start-up based on arguments provided
+ */
+extern netdev2_tap_params_t netdev2_tap_params[NETDEV2_TAP_MAX];
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETDEV2_TAP_PARAMS_H_ */
+/** @} */
diff --git a/cpu/native/startup.c b/cpu/native/startup.c
index 7851d4c5c4c39..3bc089eed6b66 100644
--- a/cpu/native/startup.c
+++ b/cpu/native/startup.c
@@ -49,8 +49,9 @@ int _native_rng_mode = 0;
 const char *_native_unix_socket_path = NULL;
 
 #ifdef MODULE_NETDEV2_TAP
-#include "netdev2_tap.h"
-extern netdev2_tap_t netdev2_tap;
+#include "netdev2_tap_params.h"
+
+netdev2_tap_params_t netdev2_tap_params[NETDEV2_TAP_MAX];
 #endif
 
 /**
@@ -246,7 +247,7 @@ __attribute__((constructor)) static void startup(int argc, char **argv)
 
 #if defined(MODULE_NETDEV2_TAP)
     if (
-            (argc < 2)
+           (argc < (NETDEV2_TAP_MAX + 1)) /* one arg per tap + 0 for command */
             || (
                 (strcmp("-h", argv[argp]) == 0)
                 || (strcmp("--help", argv[argp]) == 0)
@@ -254,7 +255,7 @@ __attribute__((constructor)) static void startup(int argc, char **argv)
        ) {
         usage_exit();
     }
-    argp++;
+    argp += NETDEV2_TAP_MAX;
 #endif
 
     for (; argp < argc; argp++) {
@@ -327,9 +328,9 @@ __attribute__((constructor)) static void startup(int argc, char **argv)
     native_cpu_init();
     native_interrupt_init();
 #ifdef MODULE_NETDEV2_TAP
-    netdev2_tap_params_t p;
-    p.tap_name = &(argv[1]);
-    netdev2_tap_setup(&netdev2_tap, &p);
+    for (int i = 0; i < NETDEV2_TAP_MAX; i++) {
+        netdev2_tap_params[i].tap_name = &(argv[i + 1]);
+    }
 #endif
 
     board_init();
diff --git a/sys/auto_init/netif/auto_init_netdev2_tap.c b/sys/auto_init/netif/auto_init_netdev2_tap.c
index 9058ac04f5058..1cf1b6cf6954b 100644
--- a/sys/auto_init/netif/auto_init_netdev2_tap.c
+++ b/sys/auto_init/netif/auto_init_netdev2_tap.c
@@ -22,33 +22,28 @@
 #define ENABLE_DEBUG (0)
 #include "debug.h"
 
-#include "netdev2_tap.h"
-#include "net/gnrc/netdev2.h"
+#include "netdev2_tap_params.h"
 #include "net/gnrc/netdev2/eth.h"
 
-extern netdev2_tap_t netdev2_tap;
-
-/**
- * @brief   Define stack parameters for the MAC layer thread
- * @{
- */
 #define TAP_MAC_STACKSIZE           (THREAD_STACKSIZE_DEFAULT + DEBUG_EXTRA_STACKSIZE)
-#ifndef TAP_MAC_PRIO
-#define TAP_MAC_PRIO                (GNRC_NETDEV2_MAC_PRIO)
-#endif
+#define TAP_MAC_PRIO                (THREAD_PRIORITY_MAIN - 3)
 
-/**
- * @brief   Stacks for the MAC layer threads
- */
-static char _netdev2_eth_stack[TAP_MAC_STACKSIZE + DEBUG_EXTRA_STACKSIZE];
-static gnrc_netdev2_t _gnrc_netdev2_tap;
+static netdev2_tap_t netdev2_tap[NETDEV2_TAP_MAX];
+static char _netdev2_eth_stack[NETDEV2_TAP_MAX][TAP_MAC_STACKSIZE + DEBUG_EXTRA_STACKSIZE];
+static gnrc_netdev2_t _gnrc_netdev2_tap[NETDEV2_TAP_MAX];
 
 void auto_init_netdev2_tap(void)
 {
-    gnrc_netdev2_eth_init(&_gnrc_netdev2_tap, (netdev2_t*)&netdev2_tap);
-
-    gnrc_netdev2_init(_netdev2_eth_stack, TAP_MAC_STACKSIZE,
-            TAP_MAC_PRIO, "gnrc_netdev2_tap", &_gnrc_netdev2_tap);
+    for (int i = 0; i < NETDEV2_TAP_MAX; i++) {
+        const netdev2_tap_params_t *p = &netdev2_tap_params[i];
+        DEBUG("Initializing netdev2_tap on TAP %s\n", *(p->tap_name));
+        netdev2_tap_setup(&netdev2_tap[i], p);
+        gnrc_netdev2_eth_init(&_gnrc_netdev2_tap[i], (netdev2_t*)&netdev2_tap[i]);
+
+        gnrc_netdev2_init(_netdev2_eth_stack[i], TAP_MAC_STACKSIZE,
+                          TAP_MAC_PRIO, "gnrc_netdev2_tap",
+                          &_gnrc_netdev2_tap[i]);
+    }
 }
 
 #else