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fix(lwip): Fix potential data-race in ping tcpip callback

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Need to use tcpip_api_call() instead of tcpip_callback(), since the
former waits for the tcpip task to complete and thus prevents potential
data races with subsequent TCP/IP tasks.
This commit is contained in:
David Cermak 2025-01-20 10:43:18 +01:00 committed by David Čermák
parent 9d3c8f0532
commit 8b0c488184
1 changed files with 7 additions and 9 deletions
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16
components/lwip/apps/ping/ping_sock.c
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@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2019-2024 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2019-2025 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@ -27,28 +27,26 @@
#include "esp_check.h"
#ifndef CONFIG_LWIP_NETIF_API
#include "lwip/priv/tcpip_priv.h"
// If POSIX NETIF_API not enabled, we need to supply the implementation of if_indextoname()
// using tcpip_callback()
// using tcpip_api_call()
#include "lwip/priv/tcpip_priv.h"
struct tcpip_netif_name {
struct tcpip_api_call_data call;
u8_t ifindex;
char *ifname;
err_t err;
};
static void do_netif_index_to_name(void *ctx)
static err_t do_netif_index_to_name(struct tcpip_api_call_data *msg)
{
struct tcpip_netif_name *params = ctx;
params->err = netif_index_to_name(params->ifindex, params->ifname) ? ERR_OK : ERR_IF;
struct tcpip_netif_name *params = __containerof(msg, struct tcpip_netif_name, call);
return netif_index_to_name(params->ifindex, params->ifname) ? ERR_OK : ERR_IF;
}
char *if_indextoname(unsigned int ifindex, char *ifname)
{
struct tcpip_netif_name params = { .ifindex = ifindex, .ifname = ifname };
if (tcpip_callback(do_netif_index_to_name, &params) != ERR_OK || params.err != ERR_OK) {
if (tcpip_api_call(do_netif_index_to_name, &params.call) != ERR_OK) {
return NULL;
}
return ifname;