PF_AA_ANCHOR
snl_add_msg_attr_string(&nw, PF_AA_ANCHOR, pa->anchor);
snl_add_msg_attr_string(&nw, PF_AA_ANCHOR, anchor);
{ .type = PF_AA_ANCHOR, .off = _OUT(anchor), .arg_u32 = MAXPATHLEN, .cb = snl_attr_copy_string },
snl_add_msg_attr_string(&nw, PF_AA_ANCHOR, anchor);
{ .type = PF_AA_ANCHOR, .off = _OUT(anchor), .arg = (void *)MAXPATHLEN, .cb = nlattr_get_chara },
nlattr_add_string(nw, PF_AA_ANCHOR, attrs.anchor);