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/* ... */
#pragma once
#include <stdbool.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#define IPV6_MULTICAST_IF 0x300
#define IPV6_MULTICAST_HOPS 0x301
#define IPV6_MULTICAST_LOOP 0x302
struct lwip_sock;
bool lwip_setsockopt_impl_ext(struct lwip_sock* sock, int level, int optname, const void *optval, uint32_t optlen, int *err);
bool lwip_getsockopt_impl_ext(struct lwip_sock* sock, int level, int optname, void *optval, uint32_t *optlen, int *err);
#ifdef __cplusplus
}{...}
#endif