[lwip-devel] [bug #55252] Gratuitous ARP sent before valid ip address is obtained

[Dirk Ziegelmeier]

Follow-up Comment #1, bug #55252 (project lwip):

This code does not seem to exist in git head or 2.1.2 - do you run a patched
version of lwIP or do I miss something??

Currently, the only usage of etharp_gratuitous() is here, and its encapsulated
with an ip4_addr_isany_val() check:

static void
netif_issue_reports(struct netif *netif, u8_t report_type)
{

[...]

#if LWIP_IPV4
  if ((report_type & NETIF_REPORT_TYPE_IPV4) &&
      !ip4_addr_isany_val(*netif_ip4_addr(netif))) {
#if LWIP_ARP && !LWIP_ACD
    /* For Ethernet network interfaces:
     * we would like to send a "gratuitous ARP".
     * Only needs to be done here if ACD isn't configured.
     */
    if (netif->flags & (NETIF_FLAG_ETHARP)) {
      etharp_gratuitous(netif);
    }


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