lwIP 2.1.1 Lightweight IP stack

Macros
Multicast
lwIP » Options (lwipopts.h) » Infrastructure

## Macros
#define | LWIP_MULTICAST_TX_OPTIONS ((LWIP_IGMP || LWIP_IPV6_MLD) && (LWIP_UDP || LWIP_RAW))

## Detailed Description

## Macro Definition Documentation

## ◆ LWIP_MULTICAST_TX_OPTIONS

#define LWIP_MULTICAST_TX_OPTIONS ((LWIP_IGMP || LWIP_IPV6_MLD) && (LWIP_UDP || LWIP_RAW))

LWIP_MULTICAST_TX_OPTIONS==1: Enable multicast TX support like the socket options IP_MULTICAST_TTL/IP_MULTICAST_IF/IP_MULTICAST_LOOP, as well as (currently only) core support for the corresponding IPv6 options.