[lwip-devel] New Hook IP function for output packages

[Daniel Lastanao]

I already wrote a thread a few months ago about implementing the functions  LWIP_HOOK_IP4_OUTPUT and LWIP_HOOK_IP6_OUTPUT. Now that I´m implementing it. I define these functions in ip4_output and in ip6_output as follows. 

ip4_output(struct pbuf *p, const ip4_addr_t *src, const ip4_addr_t *dest,

           u8_t ttl, u8_t tos, u8_t proto)

{

  struct netif *netif;

  ...

  #ifdef LWIP_HOOK_IP4_OUTPUT

  if (LWIP_HOOK_IP4_OUTPUT(p, src, dest, ttl, tos, proto, netif)) {

    /* the packet has been eaten */

    return ERR_OK;

  }

#endif

  return ip4_output_if(p, src, dest, ttl, tos, proto, netif);

}

I try to see if these functions work by printing a sentence each time the ESP32 sends a package and the program does not enter the function every time the esp32 sends a packet.

The function is defined in the opt.h file and in my files to use it in my main.cpp.

All help is welcome.