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net_if.c
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/*
* Copyright (c) 2016 Intel Corporation.
* Copyright (c) 2023 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(net_if, CONFIG_NET_IF_LOG_LEVEL);
#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <zephyr/linker/sections.h>
#include <zephyr/random/random.h>
#include <zephyr/internal/syscall_handler.h>
#include <stdlib.h>
#include <string.h>
#include <zephyr/net/igmp.h>
#include <zephyr/net/ipv4_autoconf.h>
#include <zephyr/net/mld.h>
#include <zephyr/net/net_core.h>
#include <zephyr/net/net_event.h>
#include <zephyr/net/net_pkt.h>
#include <zephyr/net/net_if.h>
#include <zephyr/net/net_mgmt.h>
#include <zephyr/net/ethernet.h>
#ifdef CONFIG_WIFI_NM
#include <zephyr/net/wifi_nm.h>
#endif
#include <zephyr/net/offloaded_netdev.h>
#include <zephyr/net/virtual.h>
#include <zephyr/net/socket.h>
#include <zephyr/sys/iterable_sections.h>
#include "net_private.h"
#include "ipv4.h"
#include "ipv6.h"
#include "net_stats.h"
#define REACHABLE_TIME (MSEC_PER_SEC * 30) /* in ms */
/*
* split the min/max random reachable factors into numerator/denominator
* so that integer-based math works better
*/
#define MIN_RANDOM_NUMER (1)
#define MIN_RANDOM_DENOM (2)
#define MAX_RANDOM_NUMER (3)
#define MAX_RANDOM_DENOM (2)
static K_MUTEX_DEFINE(lock);
/* net_if dedicated section limiters */
extern struct net_if _net_if_list_start[];
extern struct net_if _net_if_list_end[];
static struct net_if *default_iface;
#if defined(CONFIG_NET_NATIVE_IPV4) || defined(CONFIG_NET_NATIVE_IPV6)
static struct net_if_router routers[CONFIG_NET_MAX_ROUTERS];
static struct k_work_delayable router_timer;
static sys_slist_t active_router_timers;
#endif
#if defined(CONFIG_NET_NATIVE_IPV6)
/* Timer that triggers network address renewal */
static struct k_work_delayable address_lifetime_timer;
/* Track currently active address lifetime timers */
static sys_slist_t active_address_lifetime_timers;
/* Timer that triggers IPv6 prefix lifetime */
static struct k_work_delayable prefix_lifetime_timer;
/* Track currently active IPv6 prefix lifetime timers */
static sys_slist_t active_prefix_lifetime_timers;
#if defined(CONFIG_NET_IPV6_DAD)
/** Duplicate address detection (DAD) timer */
static struct k_work_delayable dad_timer;
static sys_slist_t active_dad_timers;
#endif
#if defined(CONFIG_NET_IPV6_ND)
static struct k_work_delayable rs_timer;
static sys_slist_t active_rs_timers;
#endif
#endif /* CONFIG_NET_NATIVE_IPV6 */
#if defined(CONFIG_NET_IPV6)
static struct {
struct net_if_ipv6 ipv6;
struct net_if *iface;
} ipv6_addresses[CONFIG_NET_IF_MAX_IPV6_COUNT];
#endif /* CONFIG_NET_NATIVE_IPV6 */
#if defined(CONFIG_NET_IPV4)
static struct {
struct net_if_ipv4 ipv4;
struct net_if *iface;
} ipv4_addresses[CONFIG_NET_IF_MAX_IPV4_COUNT];
#endif /* CONFIG_NET_NATIVE_IPV4 */
/* We keep track of the link callbacks in this list.
*/
static sys_slist_t link_callbacks;
#if defined(CONFIG_NET_NATIVE_IPV4) || defined(CONFIG_NET_NATIVE_IPV6)
/* Multicast join/leave tracking.
*/
static sys_slist_t mcast_monitor_callbacks;
#endif
#if defined(CONFIG_NET_PKT_TIMESTAMP_THREAD)
#if !defined(CONFIG_NET_PKT_TIMESTAMP_STACK_SIZE)
#define CONFIG_NET_PKT_TIMESTAMP_STACK_SIZE 1024
#endif
K_KERNEL_STACK_DEFINE(tx_ts_stack, CONFIG_NET_PKT_TIMESTAMP_STACK_SIZE);
K_FIFO_DEFINE(tx_ts_queue);
static struct k_thread tx_thread_ts;
/* We keep track of the timestamp callbacks in this list.
*/
static sys_slist_t timestamp_callbacks;
#endif /* CONFIG_NET_PKT_TIMESTAMP_THREAD */
#if CONFIG_NET_IF_LOG_LEVEL >= LOG_LEVEL_DBG
#define debug_check_packet(pkt) \
do { \
NET_DBG("Processing (pkt %p, prio %d) network packet " \
"iface %d (%p)", \
pkt, net_pkt_priority(pkt), \
net_if_get_by_iface(net_pkt_iface(pkt)), \
net_pkt_iface(pkt)); \
\
NET_ASSERT(pkt->frags); \
} while (false)
#else
#define debug_check_packet(...)
#endif /* CONFIG_NET_IF_LOG_LEVEL >= LOG_LEVEL_DBG */
struct net_if *z_impl_net_if_get_by_index(int index)
{
if (index <= 0) {
return NULL;
}
if (&_net_if_list_start[index - 1] >= _net_if_list_end) {
NET_DBG("Index %d is too large", index);
return NULL;
}
return &_net_if_list_start[index - 1];
}
#ifdef CONFIG_USERSPACE
struct net_if *z_vrfy_net_if_get_by_index(int index)
{
struct net_if *iface;
iface = net_if_get_by_index(index);
if (!iface) {
return NULL;
}
if (!k_object_is_valid(iface, K_OBJ_NET_IF)) {
return NULL;
}
return iface;
}
#include <zephyr/syscalls/net_if_get_by_index_mrsh.c>
#endif
#if defined(CONFIG_NET_NATIVE)
static inline void net_context_send_cb(struct net_context *context,
int status)
{
if (!context) {
return;
}
if (context->send_cb) {
context->send_cb(context, status, context->user_data);
}
if (IS_ENABLED(CONFIG_NET_UDP) &&
net_context_get_proto(context) == IPPROTO_UDP) {
net_stats_update_udp_sent(net_context_get_iface(context));
} else if (IS_ENABLED(CONFIG_NET_TCP) &&
net_context_get_proto(context) == IPPROTO_TCP) {
net_stats_update_tcp_seg_sent(net_context_get_iface(context));
}
}
static void update_txtime_stats_detail(struct net_pkt *pkt,
uint32_t start_time, uint32_t stop_time)
{
uint32_t val, prev = start_time;
int i;
for (i = 0; i < net_pkt_stats_tick_count(pkt); i++) {
if (!net_pkt_stats_tick(pkt)[i]) {
break;
}
val = net_pkt_stats_tick(pkt)[i] - prev;
prev = net_pkt_stats_tick(pkt)[i];
net_pkt_stats_tick(pkt)[i] = val;
}
}
static bool net_if_tx(struct net_if *iface, struct net_pkt *pkt)
{
struct net_linkaddr ll_dst = { 0 };
struct net_context *context;
uint32_t create_time;
int status;
/* We collect send statistics for each socket priority if enabled */
uint8_t pkt_priority;
if (!pkt) {
return false;
}
create_time = net_pkt_create_time(pkt);
debug_check_packet(pkt);
/* If there're any link callbacks, with such a callback receiving
* a destination address, copy that address out of packet, just in
* case packet is freed before callback is called.
*/
if (!sys_slist_is_empty(&link_callbacks)) {
if (net_linkaddr_set(&ll_dst,
net_pkt_lladdr_dst(pkt)->addr,
net_pkt_lladdr_dst(pkt)->len) < 0) {
return false;
}
}
context = net_pkt_context(pkt);
if (net_if_flag_is_set(iface, NET_IF_LOWER_UP)) {
if (IS_ENABLED(CONFIG_NET_PKT_TXTIME_STATS) ||
IS_ENABLED(CONFIG_TRACING_NET_CORE)) {
pkt_priority = net_pkt_priority(pkt);
if (IS_ENABLED(CONFIG_NET_PKT_TXTIME_STATS_DETAIL)) {
/* Make sure the statistics information is not
* lost by keeping the net_pkt over L2 send.
*/
net_pkt_ref(pkt);
}
}
net_if_tx_lock(iface);
status = net_if_l2(iface)->send(iface, pkt);
net_if_tx_unlock(iface);
if (status < 0) {
NET_WARN("iface %d pkt %p send failure status %d",
net_if_get_by_iface(iface), pkt, status);
}
if (IS_ENABLED(CONFIG_NET_PKT_TXTIME_STATS) ||
IS_ENABLED(CONFIG_TRACING_NET_CORE)) {
uint32_t end_tick = k_cycle_get_32();
net_pkt_set_tx_stats_tick(pkt, end_tick);
net_stats_update_tc_tx_time(iface,
pkt_priority,
create_time,
end_tick);
SYS_PORT_TRACING_FUNC(net, tx_time, pkt, end_tick);
if (IS_ENABLED(CONFIG_NET_PKT_TXTIME_STATS_DETAIL)) {
update_txtime_stats_detail(
pkt,
create_time,
end_tick);
net_stats_update_tc_tx_time_detail(
iface, pkt_priority,
net_pkt_stats_tick(pkt));
/* For TCP connections, we might keep the pkt
* longer so that we can resend it if needed.
* Because of that we need to clear the
* statistics here.
*/
net_pkt_stats_tick_reset(pkt);
net_pkt_unref(pkt);
}
}
} else {
/* Drop packet if interface is not up */
NET_WARN("iface %d is down", net_if_get_by_iface(iface));
status = -ENETDOWN;
}
if (status < 0) {
net_pkt_unref(pkt);
} else {
net_stats_update_bytes_sent(iface, status);
}
if (context) {
NET_DBG("Calling context send cb %p status %d",
context, status);
net_context_send_cb(context, status);
}
if (ll_dst.len > 0) {
net_if_call_link_cb(iface, &ll_dst, status);
}
return true;
}
void net_process_tx_packet(struct net_pkt *pkt)
{
struct net_if *iface;
net_pkt_set_tx_stats_tick(pkt, k_cycle_get_32());
iface = net_pkt_iface(pkt);
net_if_tx(iface, pkt);
#if defined(CONFIG_NET_POWER_MANAGEMENT)
iface->tx_pending--;
#endif
}
void net_if_try_queue_tx(struct net_if *iface, struct net_pkt *pkt, k_timeout_t timeout)
{
if (!net_pkt_filter_send_ok(pkt)) {
/* Silently drop the packet, but update the statistics in order
* to be able to monitor filter activity.
*/
net_stats_update_filter_tx_drop(net_pkt_iface(pkt));
net_pkt_unref(pkt);
return;
}
size_t len = net_pkt_get_len(pkt);
uint8_t prio = net_pkt_priority(pkt);
uint8_t tc = net_tx_priority2tc(prio);
#if NET_TC_TX_COUNT > 1
NET_DBG("TC %d with prio %d pkt %p", tc, prio, pkt);
#endif
/* For highest priority packet, skip the TX queue and push directly to
* the driver. Also if there are no TX queue/thread, push the packet
* directly to the driver.
*/
if ((IS_ENABLED(CONFIG_NET_TC_TX_SKIP_FOR_HIGH_PRIO) &&
prio >= NET_PRIORITY_CA) || NET_TC_TX_COUNT == 0) {
net_pkt_set_tx_stats_tick(pkt, k_cycle_get_32());
net_if_tx(net_pkt_iface(pkt), pkt);
} else {
if (net_tc_try_submit_to_tx_queue(tc, pkt, timeout) != NET_OK) {
goto drop;
}
#if defined(CONFIG_NET_POWER_MANAGEMENT)
iface->tx_pending++;
#endif
}
net_stats_update_tc_sent_pkt(iface, tc);
net_stats_update_tc_sent_bytes(iface, tc, len);
net_stats_update_tc_sent_priority(iface, tc, prio);
return;
drop:
net_pkt_unref(pkt);
net_stats_update_tc_sent_dropped(iface, tc);
return;
}
#endif /* CONFIG_NET_NATIVE */
void net_if_stats_reset(struct net_if *iface)
{
#if defined(CONFIG_NET_STATISTICS_PER_INTERFACE)
STRUCT_SECTION_FOREACH(net_if, tmp) {
if (iface == tmp) {
net_if_lock(iface);
memset(&iface->stats, 0, sizeof(iface->stats));
net_if_unlock(iface);
return;
}
}
#else
ARG_UNUSED(iface);
#endif
}
void net_if_stats_reset_all(void)
{
#if defined(CONFIG_NET_STATISTICS_PER_INTERFACE)
STRUCT_SECTION_FOREACH(net_if, iface) {
net_if_lock(iface);
memset(&iface->stats, 0, sizeof(iface->stats));
net_if_unlock(iface);
}
#endif
}
static inline void init_iface(struct net_if *iface)
{
const struct net_if_api *api = net_if_get_device(iface)->api;
if (!api || !api->init) {
NET_ERR("Iface %p driver API init NULL", iface);
return;
}
/* By default IPv4 and IPv6 are enabled for a given network interface.
* These can be turned off later if needed.
*/
#if defined(CONFIG_NET_NATIVE_IPV4)
net_if_flag_set(iface, NET_IF_IPV4);
#endif
#if defined(CONFIG_NET_NATIVE_IPV6)
net_if_flag_set(iface, NET_IF_IPV6);
#endif
net_virtual_init(iface);
NET_DBG("On iface %d", net_if_get_by_iface(iface));
#ifdef CONFIG_USERSPACE
k_object_init(iface);
#endif
k_mutex_init(&iface->lock);
k_mutex_init(&iface->tx_lock);
api->init(iface);
net_ipv6_pe_init(iface);
}
#if defined(CONFIG_NET_NATIVE)
enum net_verdict net_if_try_send_data(struct net_if *iface, struct net_pkt *pkt,
k_timeout_t timeout)
{
const struct net_l2 *l2;
struct net_context *context = net_pkt_context(pkt);
struct net_linkaddr *dst = net_pkt_lladdr_dst(pkt);
enum net_verdict verdict = NET_OK;
int status = -EIO;
if (!net_if_flag_is_set(iface, NET_IF_LOWER_UP) ||
net_if_flag_is_set(iface, NET_IF_SUSPENDED)) {
/* Drop packet if interface is not up */
NET_WARN("iface %d is down", net_if_get_by_iface(iface));
verdict = NET_DROP;
status = -ENETDOWN;
goto done;
}
/* The check for CONFIG_NET_*_OFFLOAD here is an optimization;
* This is currently the only way for net_if_l2 to be NULL or missing send().
*/
if (IS_ENABLED(CONFIG_NET_OFFLOAD) || IS_ENABLED(CONFIG_NET_SOCKETS_OFFLOAD)) {
l2 = net_if_l2(iface);
if (l2 == NULL) {
/* Offloaded ifaces may choose not to use an L2 at all. */
NET_WARN("no l2 for iface %d, discard pkt", net_if_get_by_iface(iface));
verdict = NET_DROP;
goto done;
} else if (l2->send == NULL) {
/* Or, their chosen L2 (for example, OFFLOADED_NETDEV_L2)
* might simply not implement send.
*/
NET_WARN("l2 for iface %d cannot send, discard pkt",
net_if_get_by_iface(iface));
verdict = NET_DROP;
goto done;
}
}
/* If the ll address is not set at all, then we must set
* it here.
* Workaround Linux bug, see:
* https://github.com/zephyrproject-rtos/zephyr/issues/3111
*/
if (!net_if_flag_is_set(iface, NET_IF_POINTOPOINT) &&
net_pkt_lladdr_src(pkt)->len == 0) {
(void)net_linkaddr_set(net_pkt_lladdr_src(pkt),
net_pkt_lladdr_if(pkt)->addr,
net_pkt_lladdr_if(pkt)->len);
}
#if defined(CONFIG_NET_LOOPBACK)
/* If the packet is destined back to us, then there is no need to do
* additional checks, so let the packet through.
*/
if (net_if_l2(iface) == &NET_L2_GET_NAME(DUMMY)) {
goto done;
}
#endif
/* Bypass the IP stack with AF_INET(6)/SOCK_RAW */
if (context && net_context_get_type(context) == SOCK_RAW &&
(net_context_get_family(context) == AF_INET ||
net_context_get_family(context) == AF_INET6)) {
goto done;
}
/* If the ll dst address is not set check if it is present in the nbr
* cache.
*/
if (IS_ENABLED(CONFIG_NET_IPV6) && net_pkt_family(pkt) == AF_INET6) {
verdict = net_ipv6_prepare_for_send(pkt);
}
if (IS_ENABLED(CONFIG_NET_IPV4) && net_pkt_family(pkt) == AF_INET) {
verdict = net_ipv4_prepare_for_send(pkt);
}
done:
/* NET_OK in which case packet has checked successfully. In this case
* the net_context callback is called after successful delivery in
* net_if_tx_thread().
*
* NET_DROP in which case we call net_context callback that will
* give the status to user application.
*
* NET_CONTINUE in which case the sending of the packet is delayed.
* This can happen for example if we need to do IPv6 ND to figure
* out link layer address.
*/
if (verdict == NET_DROP) {
if (context) {
NET_DBG("Calling ctx send cb %p verdict %d",
context, verdict);
net_context_send_cb(context, status);
}
if (dst->len > 0) {
net_if_call_link_cb(iface, dst, status);
}
} else if (verdict == NET_OK) {
/* Packet is ready to be sent by L2, let's queue */
net_if_try_queue_tx(iface, pkt, timeout);
}
return verdict;
}
#endif /* CONFIG_NET_NATIVE */
int net_if_set_link_addr_locked(struct net_if *iface,
uint8_t *addr, uint8_t len,
enum net_link_type type)
{
int ret;
net_if_lock(iface);
ret = net_if_set_link_addr_unlocked(iface, addr, len, type);
net_if_unlock(iface);
return ret;
}
struct net_if *net_if_get_by_link_addr(struct net_linkaddr *ll_addr)
{
STRUCT_SECTION_FOREACH(net_if, iface) {
net_if_lock(iface);
if (!memcmp(net_if_get_link_addr(iface)->addr, ll_addr->addr,
ll_addr->len)) {
net_if_unlock(iface);
return iface;
}
net_if_unlock(iface);
}
return NULL;
}
struct net_if *net_if_lookup_by_dev(const struct device *dev)
{
STRUCT_SECTION_FOREACH(net_if, iface) {
if (net_if_get_device(iface) == dev) {
return iface;
}
}
return NULL;
}
void net_if_set_default(struct net_if *iface)
{
default_iface = iface;
}
struct net_if *net_if_get_default(void)
{
struct net_if *iface = NULL;
if (&_net_if_list_start[0] == &_net_if_list_end[0]) {
NET_WARN("No default interface found!");
return NULL;
}
if (default_iface != NULL) {
return default_iface;
}
#if defined(CONFIG_NET_DEFAULT_IF_ETHERNET)
iface = net_if_get_first_by_type(&NET_L2_GET_NAME(ETHERNET));
#endif
#if defined(CONFIG_NET_DEFAULT_IF_IEEE802154)
iface = net_if_get_first_by_type(&NET_L2_GET_NAME(IEEE802154));
#endif
#if defined(CONFIG_NET_DEFAULT_IF_DUMMY)
iface = net_if_get_first_by_type(&NET_L2_GET_NAME(DUMMY));
#endif
#if defined(CONFIG_NET_DEFAULT_IF_OFFLOAD)
iface = net_if_get_first_by_type(NULL);
#endif
#if defined(CONFIG_NET_DEFAULT_IF_CANBUS_RAW)
iface = net_if_get_first_by_type(&NET_L2_GET_NAME(CANBUS_RAW));
#endif
#if defined(CONFIG_NET_DEFAULT_IF_PPP)
iface = net_if_get_first_by_type(&NET_L2_GET_NAME(PPP));
#endif
#if defined(CONFIG_NET_DEFAULT_IF_OFFLOADED_NETDEV)
iface = net_if_get_first_by_type(&NET_L2_GET_NAME(OFFLOADED_NETDEV));
#endif
#if defined(CONFIG_NET_DEFAULT_IF_UP)
iface = net_if_get_first_up();
#endif
#if defined(CONFIG_NET_DEFAULT_IF_WIFI)
iface = net_if_get_first_wifi();
#endif
return iface ? iface : _net_if_list_start;
}
struct net_if *net_if_get_first_by_type(const struct net_l2 *l2)
{
STRUCT_SECTION_FOREACH(net_if, iface) {
if (IS_ENABLED(CONFIG_NET_OFFLOAD) &&
!l2 && net_if_offload(iface)) {
return iface;
}
if (net_if_l2(iface) == l2) {
return iface;
}
}
return NULL;
}
struct net_if *net_if_get_first_up(void)
{
STRUCT_SECTION_FOREACH(net_if, iface) {
if (net_if_flag_is_set(iface, NET_IF_UP)) {
return iface;
}
}
return NULL;
}
static enum net_l2_flags l2_flags_get(struct net_if *iface)
{
enum net_l2_flags flags = 0;
if (net_if_l2(iface) && net_if_l2(iface)->get_flags) {
flags = net_if_l2(iface)->get_flags(iface);
}
return flags;
}
#if defined(CONFIG_NET_IP)
/* Return how many bits are shared between two IP addresses */
static uint8_t get_ipaddr_diff(const uint8_t *src, const uint8_t *dst, int addr_len)
{
uint8_t j, k, xor;
uint8_t len = 0U;
for (j = 0U; j < addr_len; j++) {
if (src[j] == dst[j]) {
len += 8U;
} else {
xor = src[j] ^ dst[j];
for (k = 0U; k < 8; k++) {
if (!(xor & 0x80)) {
len++;
xor <<= 1;
} else {
break;
}
}
break;
}
}
return len;
}
#endif /* CONFIG_NET_IP */
#if defined(CONFIG_NET_NATIVE_IPV4) || defined(CONFIG_NET_NATIVE_IPV6)
static struct net_if_router *iface_router_lookup(struct net_if *iface,
uint8_t family, void *addr)
{
struct net_if_router *router = NULL;
int i;
k_mutex_lock(&lock, K_FOREVER);
for (i = 0; i < CONFIG_NET_MAX_ROUTERS; i++) {
if (!routers[i].is_used ||
routers[i].address.family != family ||
routers[i].iface != iface) {
continue;
}
if ((IS_ENABLED(CONFIG_NET_IPV6) && family == AF_INET6 &&
net_ipv6_addr_cmp(net_if_router_ipv6(&routers[i]),
(struct in6_addr *)addr)) ||
(IS_ENABLED(CONFIG_NET_IPV4) && family == AF_INET &&
net_ipv4_addr_cmp(net_if_router_ipv4(&routers[i]),
(struct in_addr *)addr))) {
router = &routers[i];
goto out;
}
}
out:
k_mutex_unlock(&lock);
return router;
}
static void iface_router_notify_deletion(struct net_if_router *router,
const char *delete_reason)
{
if (IS_ENABLED(CONFIG_NET_IPV6) &&
router->address.family == AF_INET6) {
NET_DBG("IPv6 router %s %s",
net_sprint_ipv6_addr(net_if_router_ipv6(router)),
delete_reason);
net_mgmt_event_notify_with_info(NET_EVENT_IPV6_ROUTER_DEL,
router->iface,
&router->address.in6_addr,
sizeof(struct in6_addr));
} else if (IS_ENABLED(CONFIG_NET_IPV4) &&
router->address.family == AF_INET) {
NET_DBG("IPv4 router %s %s",
net_sprint_ipv4_addr(net_if_router_ipv4(router)),
delete_reason);
net_mgmt_event_notify_with_info(NET_EVENT_IPV4_ROUTER_DEL,
router->iface,
&router->address.in_addr,
sizeof(struct in6_addr));
}
}
static inline int32_t iface_router_ends(const struct net_if_router *router,
uint32_t now)
{
uint32_t ends = router->life_start;
ends += MSEC_PER_SEC * router->lifetime;
/* Signed number of ms until router lifetime ends */
return (int32_t)(ends - now);
}
static void iface_router_update_timer(uint32_t now)
{
struct net_if_router *router, *next;
uint32_t new_delay = UINT32_MAX;
k_mutex_lock(&lock, K_FOREVER);
SYS_SLIST_FOR_EACH_CONTAINER_SAFE(&active_router_timers,
router, next, node) {
int32_t ends = iface_router_ends(router, now);
if (ends <= 0) {
new_delay = 0;
break;
}
new_delay = MIN((uint32_t)ends, new_delay);
}
if (new_delay == UINT32_MAX) {
k_work_cancel_delayable(&router_timer);
} else {
k_work_reschedule(&router_timer, K_MSEC(new_delay));
}
k_mutex_unlock(&lock);
}
static void iface_router_expired(struct k_work *work)
{
uint32_t current_time = k_uptime_get_32();
struct net_if_router *router, *next;
sys_snode_t *prev_node = NULL;
ARG_UNUSED(work);
k_mutex_lock(&lock, K_FOREVER);
SYS_SLIST_FOR_EACH_CONTAINER_SAFE(&active_router_timers,
router, next, node) {
int32_t ends = iface_router_ends(router, current_time);
if (ends > 0) {
/* We have to loop on all active routers as their
* lifetime differ from each other.
*/
prev_node = &router->node;
continue;
}
iface_router_notify_deletion(router, "has expired");
sys_slist_remove(&active_router_timers,
prev_node, &router->node);
router->is_used = false;
}
iface_router_update_timer(current_time);
k_mutex_unlock(&lock);
}
static struct net_if_router *iface_router_add(struct net_if *iface,
uint8_t family, void *addr,
bool is_default,
uint16_t lifetime)
{
struct net_if_router *router = NULL;
int i;
k_mutex_lock(&lock, K_FOREVER);
for (i = 0; i < CONFIG_NET_MAX_ROUTERS; i++) {
if (routers[i].is_used) {
continue;
}
routers[i].is_used = true;
routers[i].iface = iface;
routers[i].address.family = family;
if (lifetime) {
routers[i].is_default = true;
routers[i].is_infinite = false;
routers[i].lifetime = lifetime;
routers[i].life_start = k_uptime_get_32();
sys_slist_append(&active_router_timers,
&routers[i].node);
iface_router_update_timer(routers[i].life_start);
} else {
routers[i].is_default = false;
routers[i].is_infinite = true;
routers[i].lifetime = 0;
}
if (IS_ENABLED(CONFIG_NET_IPV6) && family == AF_INET6) {
memcpy(net_if_router_ipv6(&routers[i]), addr,
sizeof(struct in6_addr));
net_mgmt_event_notify_with_info(
NET_EVENT_IPV6_ROUTER_ADD, iface,
&routers[i].address.in6_addr,
sizeof(struct in6_addr));
NET_DBG("interface %p router %s lifetime %u default %d "
"added", iface,
net_sprint_ipv6_addr((struct in6_addr *)addr),
lifetime, routers[i].is_default);
} else if (IS_ENABLED(CONFIG_NET_IPV4) && family == AF_INET) {
memcpy(net_if_router_ipv4(&routers[i]), addr,
sizeof(struct in_addr));
routers[i].is_default = is_default;
net_mgmt_event_notify_with_info(
NET_EVENT_IPV4_ROUTER_ADD, iface,
&routers[i].address.in_addr,
sizeof(struct in_addr));
NET_DBG("interface %p router %s lifetime %u default %d "
"added", iface,
net_sprint_ipv4_addr((struct in_addr *)addr),
lifetime, is_default);
}
router = &routers[i];
goto out;
}
out:
k_mutex_unlock(&lock);
return router;
}
static bool iface_router_rm(struct net_if_router *router)
{
bool ret = false;
k_mutex_lock(&lock, K_FOREVER);
if (!router->is_used) {
goto out;
}
iface_router_notify_deletion(router, "has been removed");
/* We recompute the timer if only the router was time limited */
if (sys_slist_find_and_remove(&active_router_timers, &router->node)) {
iface_router_update_timer(k_uptime_get_32());
}
router->is_used = false;
ret = true;
out:
k_mutex_unlock(&lock);
return ret;
}
void net_if_router_rm(struct net_if_router *router)
{
k_mutex_lock(&lock, K_FOREVER);
router->is_used = false;
/* FIXME - remove timer */
k_mutex_unlock(&lock);
}
static struct net_if_router *iface_router_find_default(struct net_if *iface,
uint8_t family, void *addr)
{
struct net_if_router *router = NULL;
int i;
/* Todo: addr will need to be handled */
ARG_UNUSED(addr);
k_mutex_lock(&lock, K_FOREVER);
for (i = 0; i < CONFIG_NET_MAX_ROUTERS; i++) {
if (!routers[i].is_used ||
!routers[i].is_default ||
routers[i].address.family != family) {
continue;
}
if (iface && iface != routers[i].iface) {
continue;
}
router = &routers[i];
goto out;
}
out:
k_mutex_unlock(&lock);
return router;
}
static void iface_router_init(void)
{
k_work_init_delayable(&router_timer, iface_router_expired);
sys_slist_init(&active_router_timers);
}
#else
#define iface_router_init(...)
#endif /* CONFIG_NET_NATIVE_IPV4 || CONFIG_NET_NATIVE_IPV6 */