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28204e0a4f
Currently an interface's existence is not checked when it is supplied by the user with the `nib` command. This can lead to assertion errors as soon as the generated entry tries to resolve an address or route generated with that command and the network interface not being found.
286 lines
8.6 KiB
C
286 lines
8.6 KiB
C
/*
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* Copyright (C) 2017 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @{
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*
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* @file
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* @author Martine Lenders <m.lenders@fu-berlin.de>
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*/
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#include <stdio.h>
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#include "net/gnrc/ipv6/nib.h"
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#include "net/gnrc/netif.h"
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#include "net/ipv6/addr.h"
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static void _usage(char **argv);
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static int _nib_neigh(int argc, char **argv);
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static int _nib_prefix(int argc, char **argv);
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static int _nib_route(int argc, char **argv);
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int _gnrc_ipv6_nib(int argc, char **argv)
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{
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int res = 1;
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if ((argc < 2) || (strcmp(argv[1], "help") == 0)) {
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_usage(argv);
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res = 0;
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}
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else if (strcmp(argv[1], "neigh") == 0) {
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res = _nib_neigh(argc, argv);
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}
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else if (strcmp(argv[1], "prefix") == 0) {
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res = _nib_prefix(argc, argv);
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}
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else if (strcmp(argv[1], "route") == 0) {
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res = _nib_route(argc, argv);
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}
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else {
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_usage(argv);
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}
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return res;
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}
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static void _usage(char **argv)
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{
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printf("usage: %s {neigh|prefix|route|help} ...\n", argv[0]);
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}
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static void _usage_nib_neigh(char **argv)
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{
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printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
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printf(" %s %s add <iface> <ipv6 addr> [<l2 addr>]\n", argv[0], argv[1]);
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printf(" %s %s del <iface> <ipv6 addr>\n", argv[0], argv[1]);
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printf(" %s %s show [iface]\n", argv[0], argv[1]);
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}
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static void _usage_nib_prefix(char **argv)
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{
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printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
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printf(" %s %s add <iface> <prefix>[/<prefix_len>] [<valid in sec>] [<pref in sec>]\n",
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argv[0], argv[1]);
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printf(" %s %s del <iface> <prefix>[/<prefix_len>]\n", argv[0], argv[1]);
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printf(" %s %s show [iface]\n", argv[0], argv[1]);
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}
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static void _usage_nib_route(char **argv)
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{
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printf("usage: %s %s [show|add|del|help]\n", argv[0], argv[1]);
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printf(" %s %s add <iface> <prefix>[/<prefix_len>] <next_hop> [<ltime in sec>]\n",
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argv[0], argv[1]);
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printf(" %s %s del <iface> <prefix>[/<prefix_len>]\n", argv[0], argv[1]);
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printf(" %s %s show [iface]\n", argv[0], argv[1]);
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}
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static inline gnrc_netif_t *_get_iface(unsigned iface)
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{
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/* To prevent integer overflow we can't use pid_is_valid() since it
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* itself would cause an overflow due to the cast to `kernel_pid_t` */
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return (iface <= ((unsigned)KERNEL_PID_LAST))
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? gnrc_netif_get_by_pid(iface)
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: NULL;
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}
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static int _nib_neigh(int argc, char **argv)
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{
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if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
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gnrc_ipv6_nib_nc_t entry;
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void *state = NULL;
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unsigned iface = 0U;
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if (argc > 3) {
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iface = atoi(argv[3]);
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}
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while (gnrc_ipv6_nib_nc_iter(iface, &state, &entry)) {
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gnrc_ipv6_nib_nc_print(&entry);
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}
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}
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else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
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_usage_nib_neigh(argv);
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}
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else if ((argc > 4) && (strcmp(argv[2], "add") == 0)) {
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ipv6_addr_t ipv6_addr;
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uint8_t l2addr[GNRC_IPV6_NIB_L2ADDR_MAX_LEN];
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size_t l2addr_len = 0;
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unsigned iface = atoi(argv[3]);
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if (_get_iface(iface) == NULL) {
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printf("Interface %u does not exist\n", iface);
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return 1;
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}
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if (ipv6_addr_from_str(&ipv6_addr, argv[4]) == NULL) {
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_usage_nib_neigh(argv);
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return 1;
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}
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if ((argc > 5) && /* TODO also check if interface supports link-layers or not */
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(l2addr_len = gnrc_netif_addr_from_str(argv[5], l2addr)) == 0) {
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_usage_nib_neigh(argv);
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return 1;
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}
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gnrc_ipv6_nib_nc_set(&ipv6_addr, iface, l2addr, l2addr_len);
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}
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else if ((argc > 3) && (strcmp(argv[2], "del") == 0)) {
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ipv6_addr_t ipv6_addr;
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unsigned iface = atoi(argv[3]);
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if (_get_iface(iface) == NULL) {
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printf("Interface %u does not exist\n", iface);
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return 1;
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}
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if (ipv6_addr_from_str(&ipv6_addr, argv[4]) == NULL) {
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_usage_nib_neigh(argv);
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return 1;
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}
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gnrc_ipv6_nib_nc_del(&ipv6_addr, iface);
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}
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else {
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_usage_nib_neigh(argv);
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return 1;
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}
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return 0;
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}
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static int _nib_prefix(int argc, char **argv)
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{
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if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
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gnrc_ipv6_nib_pl_t entry;
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void *state = NULL;
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unsigned iface = 0U;
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if (argc > 3) {
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iface = atoi(argv[3]);
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if (_get_iface(iface) == NULL) {
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printf("Interface %u does not exist\n", iface);
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return 1;
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}
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}
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while (gnrc_ipv6_nib_pl_iter(iface, &state, &entry)) {
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gnrc_ipv6_nib_pl_print(&entry);
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}
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}
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else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
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_usage_nib_prefix(argv);
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}
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else if ((argc > 4) && (strcmp(argv[2], "add") == 0)) {
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ipv6_addr_t pfx;
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unsigned iface = atoi(argv[3]);
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unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
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uint32_t valid_ltime = UINT32_MAX, pref_ltime = UINT32_MAX;
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if (_get_iface(iface) == NULL) {
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printf("Interface %u does not exist\n", iface);
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return 1;
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}
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if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
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_usage_nib_prefix(argv);
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return 1;
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}
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if (argc > 5) {
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uint32_t ltime_ms = atoi(argv[5]);
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valid_ltime = (ltime_ms > UINT32_MAX / MS_PER_SEC) ?
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UINT32_MAX - 1 :
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ltime_ms * MS_PER_SEC;
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}
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if (argc > 6) {
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uint32_t ltime_ms = atoi(argv[6]);
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pref_ltime = (ltime_ms > UINT32_MAX / MS_PER_SEC) ?
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UINT32_MAX - 1 :
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ltime_ms * MS_PER_SEC;
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}
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gnrc_ipv6_nib_pl_set(iface, &pfx, pfx_len, valid_ltime, pref_ltime);
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}
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else if ((argc > 4) && (strcmp(argv[2], "del") == 0)) {
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ipv6_addr_t pfx;
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unsigned iface = atoi(argv[3]);
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unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
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if (_get_iface(iface) == NULL) {
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printf("Interface %u does not exist\n", iface);
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return 1;
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}
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if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
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_usage_nib_prefix(argv);
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return 1;
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}
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gnrc_ipv6_nib_pl_del(iface, &pfx, pfx_len);
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}
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else {
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_usage_nib_prefix(argv);
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return 1;
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}
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return 0;
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}
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static int _nib_route(int argc, char **argv)
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{
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if ((argc == 2) || (strcmp(argv[2], "show") == 0)) {
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gnrc_ipv6_nib_ft_t entry;
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void *state = NULL;
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unsigned iface = 0U;
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if (argc > 3) {
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iface = atoi(argv[3]);
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if (_get_iface(iface) == NULL) {
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printf("Interface %u does not exist\n", iface);
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return 1;
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}
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}
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while (gnrc_ipv6_nib_ft_iter(NULL, iface, &state, &entry)) {
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gnrc_ipv6_nib_ft_print(&entry);
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}
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}
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else if ((argc > 2) && (strcmp(argv[2], "help") == 0)) {
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_usage_nib_route(argv);
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}
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else if ((argc > 5) && (strcmp(argv[2], "add") == 0)) {
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ipv6_addr_t pfx = IPV6_ADDR_UNSPECIFIED, next_hop;
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unsigned iface = atoi(argv[3]);
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unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
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uint16_t ltime = 0;
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if (_get_iface(iface) == NULL) {
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printf("Interface %u does not exist\n", iface);
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return 1;
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}
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if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
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/* check if string equals "default"
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* => keep pfx as unspecified address == default route */
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if (strcmp(argv[4], "default") != 0) {
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_usage_nib_route(argv);
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return 1;
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}
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}
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if (ipv6_addr_from_str(&next_hop, argv[5]) == NULL) {
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_usage_nib_route(argv);
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return 1;
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}
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if (argc > 6) {
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ltime = (uint16_t)atoi(argv[6]);
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}
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gnrc_ipv6_nib_ft_add(&pfx, pfx_len, &next_hop, iface, ltime);
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}
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else if ((argc > 4) && (strcmp(argv[2], "del") == 0)) {
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ipv6_addr_t pfx;
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unsigned pfx_len = ipv6_addr_split_prefix(argv[4]);
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if (ipv6_addr_from_str(&pfx, argv[4]) == NULL) {
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_usage_nib_route(argv);
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return 1;
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}
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gnrc_ipv6_nib_ft_del(&pfx, pfx_len);
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}
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else {
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_usage_nib_route(argv);
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return 1;
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}
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return 0;
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}
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/** @} */
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