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esp_netif: initialize TCP ISN hook if enabled in configuration

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This commit is contained in:
Mahavir Jain 2020-10-15 19:10:38 +05:30 committed by bot
parent 7d226ce542
commit a57576cec4
1 changed files with 16 additions and 0 deletions
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16
components/esp_netif/lwip/esp_netif_lwip.c
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@ -33,6 +33,10 @@
#include "lwip/dns.h"
#endif
#if CONFIG_LWIP_TCP_ISN_HOOK
#include "tcp_isn.h"
#endif
#include "esp_netif_lwip_ppp.h"
#include "dhcpserver/dhcpserver.h"
#include "dhcpserver/dhcpserver_options.h"
@ -263,6 +267,18 @@ esp_err_t esp_netif_init(void)
{
if (tcpip_initialized == false) {
tcpip_initialized = true;
#if CONFIG_LWIP_TCP_ISN_HOOK
uint8_t rand_buf[16];
/*
* This is early startup code where WiFi/BT is yet to be enabled and hence
* relevant entropy source is not available. However, bootloader enables
* SAR ADC based entropy source at its initialization, and our requirement
* of random bytes is pretty small (16), so we can assume that following
* API will provide sufficiently random data.
*/
esp_fill_random(rand_buf, sizeof(rand_buf));
lwip_init_tcp_isn(esp_log_timestamp(), rand_buf);
#endif
tcpip_init(NULL, NULL);
ESP_LOGD(TAG, "LwIP stack has been initialized");
}