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RIOT/sys/shell/cmds/gnrc_ipv6_nib.c

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/*
* Copyright (C) 2017 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.
*/
/**
* @{
*
* @file
* @author Martine Lenders <m.lenders@fu-berlin.de>
*/
#include <stdio.h>
#include "kernel_defines.h"
#include "net/gnrc/ipv6/nib.h"
#include "net/gnrc/netif.h"
#include "net/ipv6/addr.h"
#include "shell.h"
#include "timex.h"
static void _usage(char **argv);
static int _nib_neigh(int argc, char **argv);
static int _nib_prefix(int argc, char **argv);
static int _nib_route(int argc, char **argv);
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C)
static int _nib_abr(int argc, char **argv);
#endif /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C */
/* TODO: updated tests/net/gnrc_dhcpv6_client to no longer abuse this shell command
* and add static qualifier */
int _gnrc_ipv6_nib(int argc, char **argv)
{
int res = 1;
if ((argc < 2) || (strcmp(argv[1], "help") == 0)) {
_usage(argv);
res = 0;
}
else if (strcmp(argv[1], "neigh") == 0) {
res = _nib_neigh(argc, argv);
}
else if (strcmp(argv[1], "prefix") == 0) {
res = _nib_prefix(argc, argv);
}
else if (strcmp(argv[1], "route") == 0) {
res = _nib_route(argc, argv);
}
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C)
else if (strcmp(argv[1], "abr") == 0) {
res = _nib_abr(argc, argv);
}
#endif /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C */
else {
_usage(argv);
}
return res;
}
SHELL_COMMAND(nib, "Configure neighbor information base", _gnrc_ipv6_nib);
static void _usage(char **argv)
{
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C)
printf("usage: %s {neigh|prefix|route|abr|help} ...\n", argv[0]);
#else /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C */
printf("usage: %s {neigh|prefix|route|help} ...\n", argv[0]);
#endif /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C */
}
static void _usage_nib_neigh(char **argv)
{
printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
printf(" %s %s add <iface> <ipv6 addr> [<l2 addr>]\n", argv[0], argv[1]);
printf(" %s %s del <iface> <ipv6 addr>\n", argv[0], argv[1]);
printf(" %s %s show [iface]\n", argv[0], argv[1]);
}
static void _usage_nib_prefix(char **argv)
{
printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
printf(" %s %s add <iface> <prefix>[/<prefix_len>] [<valid in sec>] [<pref in sec>]\n",
argv[0], argv[1]);
printf(" %s %s del <iface> <prefix>[/<prefix_len>]\n", argv[0], argv[1]);
printf(" %s %s show [iface]\n", argv[0], argv[1]);
}
static void _usage_nib_route(char **argv)
{
printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
printf(" %s %s add <iface> <prefix>[/<prefix_len>] <next_hop> [<ltime in sec>]\n",
argv[0], argv[1]);
printf(" %s %s del <iface> <prefix>[/<prefix_len>]\n", argv[0], argv[1]);
printf(" %s %s show [iface]\n", argv[0], argv[1]);
}
static inline gnrc_netif_t *_get_iface(unsigned iface)
{
/* To prevent integer overflow we can't use pid_is_valid() since it
* itself would cause an overflow due to the cast to `kernel_pid_t` */
return (iface <= ((unsigned)KERNEL_PID_LAST))
? gnrc_netif_get_by_pid(iface)
: NULL;
}
static int _nib_neigh(int argc, char **argv)
{
if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
gnrc_ipv6_nib_nc_t entry;
void *state = NULL;
unsigned iface = 0U;
if (argc > 3) {
iface = atoi(argv[3]);
}
while (gnrc_ipv6_nib_nc_iter(iface, &state, &entry)) {
gnrc_ipv6_nib_nc_print(&entry);
}
}
else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
_usage_nib_neigh(argv);
}
else if ((argc > 4) && (strcmp(argv[2], "add") == 0)) {
ipv6_addr_t ipv6_addr;
uint8_t l2addr[CONFIG_GNRC_IPV6_NIB_L2ADDR_MAX_LEN];
size_t l2addr_len = 0;
unsigned iface = atoi(argv[3]);
if (_get_iface(iface) == NULL) {
printf("Interface %u does not exist\n", iface);
return 1;
}
if (ipv6_addr_from_str(&ipv6_addr, argv[4]) == NULL) {
_usage_nib_neigh(argv);
return 1;
}
if ((argc > 5) && /* TODO also check if interface supports link-layers or not */
(l2addr_len = gnrc_netif_addr_from_str(argv[5], l2addr)) == 0) {
_usage_nib_neigh(argv);
return 1;
}
if (gnrc_ipv6_nib_nc_set(&ipv6_addr, iface, l2addr, l2addr_len) < 0) {
printf("Unable to add %s%%%u to neighbor cache\n",
argv[4], iface);
}
}
else if ((argc > 3) && (strcmp(argv[2], "del") == 0)) {
ipv6_addr_t ipv6_addr;
unsigned iface = atoi(argv[3]);
if (_get_iface(iface) == NULL) {
printf("Interface %u does not exist\n", iface);
return 1;
}
if (ipv6_addr_from_str(&ipv6_addr, argv[4]) == NULL) {
_usage_nib_neigh(argv);
return 1;
}
gnrc_ipv6_nib_nc_del(&ipv6_addr, iface);
}
else {
_usage_nib_neigh(argv);
return 1;
}
return 0;
}
static int _nib_prefix(int argc, char **argv)
{
if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
gnrc_ipv6_nib_pl_t entry;
void *state = NULL;
unsigned iface = 0U;
if (argc > 3) {
iface = atoi(argv[3]);
if (_get_iface(iface) == NULL) {
printf("Interface %u does not exist\n", iface);
return 1;
}
}
while (gnrc_ipv6_nib_pl_iter(iface, &state, &entry)) {
gnrc_ipv6_nib_pl_print(&entry);
}
}
else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
_usage_nib_prefix(argv);
}
else if ((argc > 4) && (strcmp(argv[2], "add") == 0)) {
ipv6_addr_t pfx;
unsigned iface = atoi(argv[3]);
unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
uint32_t valid_ltime = UINT32_MAX, pref_ltime = UINT32_MAX;
if (_get_iface(iface) == NULL) {
printf("Interface %u does not exist\n", iface);
return 1;
}
if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
_usage_nib_prefix(argv);
return 1;
}
if (argc > 5) {
uint32_t ltime_ms = atoi(argv[5]);
valid_ltime = (ltime_ms > UINT32_MAX / MS_PER_SEC) ?
UINT32_MAX - 1 :
ltime_ms * MS_PER_SEC;
}
if (argc > 6) {
uint32_t ltime_ms = atoi(argv[6]);
pref_ltime = (ltime_ms > UINT32_MAX / MS_PER_SEC) ?
UINT32_MAX - 1 :
ltime_ms * MS_PER_SEC;
}
gnrc_ipv6_nib_pl_set(iface, &pfx, pfx_len, valid_ltime, pref_ltime);
}
else if ((argc > 4) && (strcmp(argv[2], "del") == 0)) {
ipv6_addr_t pfx;
unsigned iface = atoi(argv[3]);
unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
if (_get_iface(iface) == NULL) {
printf("Interface %u does not exist\n", iface);
return 1;
}
if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
_usage_nib_prefix(argv);
return 1;
}
gnrc_ipv6_nib_pl_del(iface, &pfx, pfx_len);
}
else {
_usage_nib_prefix(argv);
return 1;
}
return 0;
}
static int _nib_route(int argc, char **argv)
{
if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
gnrc_ipv6_nib_ft_t entry;
void *state = NULL;
unsigned iface = 0U;
if (argc > 3) {
iface = atoi(argv[3]);
if (_get_iface(iface) == NULL) {
printf("Interface %u does not exist\n", iface);
return 1;
}
}
while (gnrc_ipv6_nib_ft_iter(NULL, iface, &state, &entry)) {
gnrc_ipv6_nib_ft_print(&entry);
}
}
else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
_usage_nib_route(argv);
}
else if ((argc > 5) && (strcmp(argv[2], "add") == 0)) {
ipv6_addr_t pfx = IPV6_ADDR_UNSPECIFIED, next_hop;
unsigned iface = atoi(argv[3]);
unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
uint16_t ltime = 0;
if (_get_iface(iface) == NULL) {
printf("Interface %u does not exist\n", iface);
return 1;
}
if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
/* check if string equals "default"
* => keep pfx as unspecified address == default route */
if (strcmp(argv[4], "default") != 0) {
_usage_nib_route(argv);
return 1;
}
}
if (ipv6_addr_from_str(&next_hop, argv[5]) == NULL) {
_usage_nib_route(argv);
return 1;
}
if (argc > 6) {
ltime = atoi(argv[6]);
}
gnrc_ipv6_nib_ft_add(&pfx, pfx_len, &next_hop, iface, ltime);
}
else if ((argc > 4) && (strcmp(argv[2], "del") == 0)) {
ipv6_addr_t pfx;
unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
_usage_nib_route(argv);
return 1;
}
gnrc_ipv6_nib_ft_del(&pfx, pfx_len);
}
else {
_usage_nib_route(argv);
return 1;
}
return 0;
}
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C)
static void _usage_nib_abr(char **argv)
{
if (IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_6LBR)) {
printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
printf(" %s %s add <ipv6 global addr>\n", argv[0], argv[1]);
printf(" %s %s del <ipv6 global addr>\n", argv[0], argv[1]);
}
else {
printf("usage: %s %s [show|help]\n", argv[0], argv[1]);
}
printf(" %s %s show\n", argv[0], argv[1]);
}
static int _nib_abr(int argc, char **argv)
{
if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
gnrc_ipv6_nib_abr_t entry;
void *state = NULL;
while (gnrc_ipv6_nib_abr_iter(&state, &entry)) {
gnrc_ipv6_nib_abr_print(&entry);
}
}
else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
_usage_nib_abr(argv);
}
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_6LBR)
else if ((argc > 3) && (strcmp(argv[2], "del") == 0)) {
ipv6_addr_t addr = IPV6_ADDR_UNSPECIFIED;
if (ipv6_addr_from_str(&addr, argv[3]) == NULL) {
_usage_nib_abr(argv);
return 1;
}
gnrc_ipv6_nib_abr_del(&addr);
}
else if ((argc > 3) && (strcmp(argv[2], "add") == 0)) {
gnrc_netif_t *netif;
ipv6_addr_t addr = IPV6_ADDR_UNSPECIFIED;
if (ipv6_addr_from_str(&addr, argv[3]) == NULL) {
_usage_nib_abr(argv);
return 1;
}
/* check addr */
if (ipv6_addr_is_link_local(&addr)) {
printf("address %s must be global\n", argv[3]);
return 1;
}
if (!(((netif = gnrc_netif_get_by_ipv6_addr(&addr)) != NULL) &&
gnrc_netif_is_6lbr(netif))) {
printf("address %s is not assigned to a 6LBR interface\n",
argv[3]);
return 1;
}
if (gnrc_ipv6_nib_abr_add(&addr) < 0) {
printf("unable to add border router %s\n", argv[3]);
return 1;
}
}
#endif /* CONFIG_GNRC_IPV6_NIB_6LBR */
else {
_usage_nib_abr(argv);
return 1;
}
return 0;
}
#endif /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C */
/** @} */
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