DST_IP4
CHECK(DST_IP4, dst_ip) ||
if ((ctx->user_ip4 >> 24) == (bpf_htonl(DST_IP4) >> 24) &&
if (ctx->local_ip4 != DST_IP4)
if (LSB(ctx->local_ip4, 0) != ((DST_IP4 >> 0) & 0xff) ||
LSB(ctx->local_ip4, 1) != ((DST_IP4 >> 8) & 0xff) ||
LSB(ctx->local_ip4, 2) != ((DST_IP4 >> 16) & 0xff) ||
LSB(ctx->local_ip4, 3) != ((DST_IP4 >> 24) & 0xff))
if (LSW(ctx->local_ip4, 0) != ((DST_IP4 >> 0) & 0xffff) ||
LSW(ctx->local_ip4, 1) != ((DST_IP4 >> 16) & 0xffff))
static const __u32 DST_IP4 = IP4(127, 0, 0, 1);