From d23ddff97160ff5d1e9d7baff0ed360fa3b6a2d9 Mon Sep 17 00:00:00 2001
From: Jeff Epler <jepler@gmail.com>
Date: Mon, 21 Aug 2023 15:57:45 -0500
Subject: [PATCH] Add several constants needed to use multicast UDP

This was verified by @todbot to work on esp32 s2 and s3;
the constant should match any system that uses LWIP numbering.
---
 shared-bindings/socketpool/SocketPool.c | 6 ++++++
 shared-bindings/socketpool/SocketPool.h | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/shared-bindings/socketpool/SocketPool.c b/shared-bindings/socketpool/SocketPool.c
index 3023721378..381291fbaf 100644
--- a/shared-bindings/socketpool/SocketPool.c
+++ b/shared-bindings/socketpool/SocketPool.c
@@ -82,6 +82,10 @@ MP_DEFINE_EXCEPTION(gaierror, OSError)
 //|     TCP_NODELAY: int
 //|
 //|     IPPROTO_TCP: int
+//|     IPPROTO_IP: int
+//|
+//|     IP_MULTICAST_TTL: int
+//|
 //|     def socket(self, family: int = AF_INET, type: int = SOCK_STREAM) -> socketpool.Socket:
 //|         """Create a new socket
 //|
@@ -182,6 +186,8 @@ STATIC const mp_rom_map_elem_t socketpool_socketpool_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_TCP_NODELAY), MP_ROM_INT(SOCKETPOOL_TCP_NODELAY) },
 
     { MP_ROM_QSTR(MP_QSTR_IPPROTO_TCP), MP_ROM_INT(SOCKETPOOL_IPPROTO_TCP) },
+    { MP_ROM_QSTR(MP_QSTR_IPPROTO_IP), MP_ROM_INT(SOCKETPOOL_IPPROTO_IP) },
+    { MP_ROM_QSTR(MP_QSTR_IP_MULTICAST_TTL), MP_ROM_INT(SOCKETPOOL_IP_MULTICAST_TTL) },
 
     { MP_ROM_QSTR(MP_QSTR_EAI_NONAME), MP_ROM_INT(SOCKETPOOL_EAI_NONAME) },
 };
diff --git a/shared-bindings/socketpool/SocketPool.h b/shared-bindings/socketpool/SocketPool.h
index 6409f8c763..9e9d7fde4f 100644
--- a/shared-bindings/socketpool/SocketPool.h
+++ b/shared-bindings/socketpool/SocketPool.h
@@ -45,6 +45,7 @@ typedef enum {
 } socketpool_socketpool_addressfamily_t;
 
 typedef enum {
+    SOCKETPOOL_IPPROTO_IP = 0,
     SOCKETPOOL_IPPROTO_TCP = 6,
 } socketpool_socketpool_ipproto_t;
 
@@ -52,6 +53,10 @@ typedef enum {
     SOCKETPOOL_TCP_NODELAY = 1,
 } socketpool_socketpool_tcpopt_t;
 
+typedef enum {
+    SOCKETPOOL_IP_MULTICAST_TTL = 5,
+} socketpool_socketpool_ipopt_t;
+
 typedef enum {
     SOCKETPOOL_EAI_NONAME  = -2,
 } socketpool_eai_t;