From a6e3b29004b3905ac3e06b442e0f48c531f187fb Mon Sep 17 00:00:00 2001
From: Shelby Merrick <sporadic@forkineye.com>
Date: Sun, 6 Jan 2019 14:29:38 -0500
Subject: [PATCH] Added support for using TCPIP_ADAPTER_IF_MAX to join igmp
 groups on all (#2279)

interfaces
---
 libraries/AsyncUDP/src/AsyncUDP.cpp | 48 +++++++++++++++++++++--------
 1 file changed, 35 insertions(+), 13 deletions(-)

diff --git a/libraries/AsyncUDP/src/AsyncUDP.cpp b/libraries/AsyncUDP/src/AsyncUDP.cpp
index 313d7ed4a..5faf43938 100644
--- a/libraries/AsyncUDP/src/AsyncUDP.cpp
+++ b/libraries/AsyncUDP/src/AsyncUDP.cpp
@@ -561,26 +561,48 @@ static esp_err_t joinMulticastGroup(const ip_addr_t *addr, bool join, tcpip_adap
             return ESP_ERR_INVALID_ARG;
         }
         netif = (struct netif *)nif;
-    }
 
-    if (addr->type == IPADDR_TYPE_V4) {
-        if(join){
-            if (igmp_joingroup_netif(netif, (const ip4_addr *)&(addr->u_addr.ip4))) {
-                return ESP_ERR_INVALID_STATE;
+        if (addr->type == IPADDR_TYPE_V4) {
+            if(join){
+                if (igmp_joingroup_netif(netif, (const ip4_addr *)&(addr->u_addr.ip4))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
+            } else {
+                if (igmp_leavegroup_netif(netif, (const ip4_addr *)&(addr->u_addr.ip4))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
             }
         } else {
-            if (igmp_leavegroup_netif(netif, (const ip4_addr *)&(addr->u_addr.ip4))) {
-                return ESP_ERR_INVALID_STATE;
+            if(join){
+                if (mld6_joingroup_netif(netif, &(addr->u_addr.ip6))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
+            } else {
+                if (mld6_leavegroup_netif(netif, &(addr->u_addr.ip6))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
             }
         }
-    } else {
-        if(join){
-            if (mld6_joingroup_netif(netif, &(addr->u_addr.ip6))) {
-                return ESP_ERR_INVALID_STATE;
+    }  else {
+        if (addr->type == IPADDR_TYPE_V4) {
+            if(join){
+                if (igmp_joingroup((const ip4_addr *)IP4_ADDR_ANY, (const ip4_addr *)&(addr->u_addr.ip4))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
+            } else {
+                if (igmp_leavegroup((const ip4_addr *)IP4_ADDR_ANY, (const ip4_addr *)&(addr->u_addr.ip4))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
             }
         } else {
-            if (mld6_leavegroup_netif(netif, &(addr->u_addr.ip6))) {
-                return ESP_ERR_INVALID_STATE;
+            if(join){
+                if (mld6_joingroup((const ip6_addr *)IP6_ADDR_ANY, &(addr->u_addr.ip6))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
+            } else {
+                if (mld6_leavegroup((const ip6_addr *)IP6_ADDR_ANY, &(addr->u_addr.ip6))) {
+                    return ESP_ERR_INVALID_STATE;
+                }
             }
         }
     }
-- 
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