100 lines
1.5 KiB
C
100 lines
1.5 KiB
C
/** @file
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* @brief Promiscuous mode support
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*
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* Allow user to receive all network packets that are seen by a
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* network interface. This requires that network device driver
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* supports promiscuous mode.
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*/
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/*
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* Copyright (c) 2018 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define LOG_MODULE_NAME net_promisc
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#define NET_LOG_LEVEL CONFIG_NET_PROMISC_LOG_LEVEL
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#include <kernel.h>
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#include <errno.h>
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#include <net/net_if.h>
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#include <net/net_core.h>
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#include <net/net_pkt.h>
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static K_FIFO_DEFINE(promiscuous_queue);
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static atomic_t enabled = ATOMIC_INIT(0);
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struct net_pkt *net_promisc_mode_wait_data(s32_t timeout)
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{
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return k_fifo_get(&promiscuous_queue, timeout);
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}
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int net_promisc_mode_on(struct net_if *iface)
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{
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int ret;
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if (!iface) {
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return -EINVAL;
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}
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ret = net_if_set_promisc(iface);
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if (!ret) {
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atomic_inc(&enabled);
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}
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return ret;
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}
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static void flush_queue(void)
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{
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struct net_pkt *pkt;
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while (1) {
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pkt = k_fifo_get(&promiscuous_queue, K_NO_WAIT);
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if (!pkt) {
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return;
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}
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net_pkt_unref(pkt);
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}
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}
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int net_promisc_mode_off(struct net_if *iface)
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{
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atomic_val_t prev;
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bool ret;
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ret = net_if_is_promisc(iface);
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if (ret) {
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net_if_unset_promisc(iface);
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prev = atomic_dec(&enabled);
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if (!prev) {
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atomic_clear(&enabled);
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flush_queue();
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}
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return 0;
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}
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return -EALREADY;
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}
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enum net_verdict net_promisc_mode_input(struct net_pkt *pkt)
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{
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if (!pkt) {
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return NET_CONTINUE;
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}
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if (!atomic_get(&enabled)) {
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return NET_DROP;
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}
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k_fifo_put(&promiscuous_queue, pkt);
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return NET_OK;
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}
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