From cc9aa3550d3bcf0e8c56ce6e80f3d7ca617cb665 Mon Sep 17 00:00:00 2001
From: Martine Lenders <mlenders@inf.fu-berlin.de>
Date: Mon, 31 Aug 2015 04:09:43 +0200
Subject: [PATCH] shell_commands: provide command for 6Lo context
administration
---
sys/shell/commands/Makefile | 5 +
sys/shell/commands/sc_gnrc_6ctx.c | 173 ++++++++++++++++++++++++++++
sys/shell/commands/shell_commands.c | 11 ++
3 files changed, 189 insertions(+)
create mode 100644 sys/shell/commands/sc_gnrc_6ctx.c
diff --git a/sys/shell/commands/Makefile b/sys/shell/commands/Makefile
index 948529eeae..74a86b495f 100644
--- a/sys/shell/commands/Makefile
+++ b/sys/shell/commands/Makefile
@@ -56,6 +56,11 @@ endif
ifneq (,$(filter gnrc_rpl,$(USEMODULE)))
SRC += sc_gnrc_rpl.c
endif
+ifneq (,$(filter gnrc_sixlowpan_ctx,$(USEMODULE)))
+ifneq (,$(filter gnrc_sixlowpan_nd_border_router,$(USEMODULE)))
+ SRC += sc_gnrc_6ctx.c
+endif
+endif
# TODO
# Conditional building not possible at the moment due to
diff --git a/sys/shell/commands/sc_gnrc_6ctx.c b/sys/shell/commands/sc_gnrc_6ctx.c
new file mode 100644
index 0000000000..17d3b72b59
--- /dev/null
+++ b/sys/shell/commands/sc_gnrc_6ctx.c
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2015 Martine Lenders <mlenders@inf.fu-berlin.de>
+ *
+ * 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.
+ */
+
+/**
+ * @{
+ *
+ * @file
+ */
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "net/ipv6/addr.h"
+#include "net/gnrc/ipv6/netif.h"
+#include "net/gnrc/ndp/internal.h"
+#include "net/gnrc/sixlowpan/ctx.h"
+#include "net/gnrc/sixlowpan/nd.h"
+#include "timex.h"
+#include "xtimer.h"
+
+static xtimer_t del_timer[GNRC_SIXLOWPAN_CTX_SIZE];
+static gnrc_sixlowpan_nd_router_abr_t *abr = NULL;
+
+void _del_cb(void *ptr)
+{
+ gnrc_sixlowpan_ctx_t *ctx = ptr;
+ uint8_t cid = ctx->flags_id & GNRC_SIXLOWPAN_CTX_FLAGS_CID_MASK;
+ ctx->prefix_len = 0;
+ gnrc_sixlowpan_nd_router_abr_rem_ctx(abr, cid);
+ del_timer[cid].callback = NULL;
+}
+
+static void _usage(char *cmd_str)
+{
+ printf("usage: %s [{add <0-15> <prefix>/<prefix_len> <ltime in min>|del <ctx>}]\n", cmd_str);
+ puts(" `del` will only invalidate the context for compression. It can be");
+ puts(" reassigned after 5 min.");
+}
+
+int _gnrc_6ctx_list(void)
+{
+ puts("cid|prefix |C|ltime");
+ puts("-----------------------------------------------------------");
+ for (uint8_t i = 0; i < GNRC_SIXLOWPAN_CTX_SIZE; i++) {
+ gnrc_sixlowpan_ctx_t *ctx = gnrc_sixlowpan_ctx_lookup_id(i);
+ if (ctx != NULL) {
+ char addr_str[IPV6_ADDR_MAX_STR_LEN];
+ printf(" %2" PRIu8 "|%39s/%-3" PRIu8 "|%" PRIx8 "|%5" PRIu16 " min\n", i,
+ ipv6_addr_to_str(addr_str, &ctx->prefix, sizeof(addr_str)), ctx->prefix_len,
+ (ctx->flags_id & 0xf0) >> 4, ctx->ltime);
+ }
+ }
+ return 0;
+}
+
+static void _adv_ctx(void)
+{
+ kernel_pid_t ifs[GNRC_NETIF_NUMOF];
+ size_t ifnum = gnrc_netif_get(ifs);
+ for (size_t i = 0; i < ifnum; i++) {
+ gnrc_ipv6_netif_t *iface = gnrc_ipv6_netif_get(ifs[i]);
+ if ((iface != NULL) && (iface->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN)) {
+ gnrc_ndp_internal_send_rtr_adv(ifs[i], NULL, NULL, false);
+ }
+ }
+}
+
+int _gnrc_6ctx_add(char *cmd_str, char *ctx_str, char *prefix_str, char *ltime_str)
+{
+ ipv6_addr_t prefix;
+ char *addr_str, *prefix_len_str, *save_ptr;
+ unsigned prefix_len;
+ unsigned ltime;
+ unsigned ctx = (unsigned)atoi(ctx_str);
+ if (ctx >= GNRC_SIXLOWPAN_CTX_SIZE) {
+ _usage(cmd_str);
+ return 1;
+ }
+ addr_str = strtok_r(prefix_str, "/", &save_ptr);
+ if (addr_str == NULL) {
+ _usage(cmd_str);
+ return 1;
+ }
+ prefix_len_str = strtok_r(NULL, "/", &save_ptr);
+ if (addr_str == NULL) {
+ _usage(cmd_str);
+ return 1;
+ }
+ prefix_len = (unsigned)atoi(prefix_len_str);
+ if ((prefix_len - 1U) > 128U) {
+ puts("ERROR: prefix_len < 1 || prefix_len > 128");
+ return 1;
+ }
+ ipv6_addr_from_str(&prefix, addr_str);
+ if (ipv6_addr_is_unspecified(&prefix)) {
+ puts("ERROR: prefix may not be ::");
+ return 1;
+ }
+ if (abr == NULL) {
+ abr = gnrc_sixlowpan_nd_router_abr_get();
+ }
+ if (gnrc_sixlowpan_nd_router_abr_add_ctx(abr, ctx) < 0) {
+ puts("ERROR: can not add context");
+ return 1;
+ }
+ ltime = (unsigned)atoi(ltime_str);
+ if (gnrc_sixlowpan_ctx_update((uint8_t)ctx, &prefix, (uint8_t)prefix_len, ltime,
+ true) == NULL) {
+ puts("ERROR: can not add context");
+ return 1;
+ }
+ /* advertise new/updated context */
+ _adv_ctx();
+ return 0;
+}
+
+int _gnrc_6ctx_del(char *cmd_str, char *ctx_str)
+{
+ gnrc_sixlowpan_ctx_t *ctx;
+ unsigned cid = (unsigned)atoi(ctx_str);
+ if (cid >= GNRC_SIXLOWPAN_CTX_SIZE) {
+ _usage(cmd_str);
+ return 1;
+ }
+ else if (del_timer[cid].callback == NULL) {
+ ctx = gnrc_sixlowpan_ctx_lookup_id(cid);
+ if (ctx != NULL) {
+ ctx->flags_id &= ~GNRC_SIXLOWPAN_CTX_FLAGS_COMP;
+ ctx->ltime = 0;
+ del_timer[cid].callback = _del_cb;
+ del_timer[cid].arg = ctx;
+ xtimer_set(&del_timer[cid], GNRC_SIXLOWPAN_ND_RTR_MIN_CTX_DELAY * SEC_IN_USEC);
+ }
+ }
+ else {
+ printf("Context %u already marked for removal\n", cid);
+ return 1;
+ }
+ /* advertise updated context */
+ _adv_ctx();
+ return 0;
+}
+
+int _gnrc_6ctx(int argc, char **argv)
+{
+ if (argc < 2) {
+ _gnrc_6ctx_list();
+ }
+ else if (strcmp("add", argv[1]) == 0) {
+ if (argc < 5) {
+ _usage(argv[0]);
+ return 1;
+ }
+ return _gnrc_6ctx_add(argv[0], argv[2], argv[3], argv[4]);
+ }
+ else if (strcmp("del", argv[1]) == 0) {
+ return _gnrc_6ctx_del(argv[0], argv[2]);
+ }
+ else {
+ _usage(argv[0]);
+ return 1;
+ }
+ return 0;
+}
+
+/** @} */
diff --git a/sys/shell/commands/shell_commands.c b/sys/shell/commands/shell_commands.c
index e8a7340592..c4a3fd02cd 100644
--- a/sys/shell/commands/shell_commands.c
+++ b/sys/shell/commands/shell_commands.c
@@ -120,6 +120,12 @@ extern int _zep_init(int argc, char **argv);
extern int _gnrc_rpl(int argc, char **argv);
#endif
+#ifdef MODULE_GNRC_SIXLOWPAN_CTX
+#ifdef MODULE_GNRC_SIXLOWPAN_ND_BORDER_ROUTER
+extern int _gnrc_6ctx(int argc, char **argv);
+#endif
+#endif
+
const shell_command_t _shell_command_list[] = {
{"reboot", "Reboot the node", _reboot_handler},
#ifdef MODULE_CONFIG
@@ -197,6 +203,11 @@ const shell_command_t _shell_command_list[] = {
#endif
#ifdef MODULE_GNRC_RPL
{"rpl", "rpl configuration tool [help|init|rm|root|show]", _gnrc_rpl },
+#endif
+#ifdef MODULE_GNRC_SIXLOWPAN_CTX
+#ifdef MODULE_GNRC_SIXLOWPAN_ND_BORDER_ROUTER
+ {"6ctx", "6LoWPAN context configuration tool", _gnrc_6ctx },
+#endif
#endif
{NULL, NULL, NULL}
};
--
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