Linux中是否有API将IPv6端点地址（如ff02::d5%eth0）解析为sockaddr_in6结构，或者我必须手动解析它并在作用域ID上调用if_nametoindex？
我试了getaddrinfo，inet_pton，都没有用。
这是我的测试程序

#include <arpa/inet.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <iostream>

int main(int argc, char** argv)
{
    struct addrinfo hints = {
        .ai_flags = AI_PASSIVE | AI_ALL,
        .ai_family = AF_INET6,
        .ai_socktype = SOCK_DGRAM,
    };
    struct addrinfo *res = nullptr;

    if (argc < 2) {
        fprintf(stderr, "Usage: %s <addr>\n", argv[0]);
        return 1;
    }

    int rc = getaddrinfo(argv[1], "5683", &hints, &res);

    if (rc) {
        std::cout << "rc = " << rc << ", res = " << (void*)res << std::endl;
        return 1;
    }

    if (res) {
        char buf[128];
        sockaddr_in *sin = (sockaddr_in *)res->ai_addr;
        switch (sin->sin_family) {
            case AF_INET:
                std::cout << inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf)) << std::endl;
                break;
            case AF_INET6:
                std::cout << inet_ntop(sin->sin_family, &((sockaddr_in6 *)sin)->sin6_addr, buf, sizeof(buf)) << std::endl;
                break;
        }
        freeaddrinfo(res);
    }

}

它可以处理1.1.1.1、::1等参数，但在提供ff02::d5%eth0、::1%lo、[::1%lo]等作用域ID时，EAI_NONAME会失败。