determine client ipv4 or ipv6

[kang joni]

how to check if client is connected using ipv4 or ipv6 in libuv?
I have this code,

struct sockaddr_storage cp;
int ilen=sizeof(cp);
uv_tcp_getpeername((uv_tcp_t*)client, (struct sockaddr*)&cp,&ilen);
int ret=uv_ip6_name((const struct sockaddr_in6*)&cp,(char*)ipname,sizeof(ipname));
//I don't think this is correct, but I haven't any clues
if (retip<0 || std::string("::")==ipname)
{
retip=uv_ip4_name((const struct sockaddr_in*)&cp,(char*)ipname, sizeof(ipname));

}

any corrections ? thanks

[Ben Noordhuis]

You can simply check if ilen == sizeof(struct sockaddr_in) or ilen ==
sizeof(struct sockaddr_in6) but a more thorough solution is to check
the address family:

struct sockaddr *sa = (struct sockaddr *) &cp;
switch (sa->sa_family) {
case AF_INET: /* ... */; break;
case AF_INET6: /* ... */; break;
}

[kang joni]

using second AF_INETXx seems more robust approach, thank you.

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