171 static struct rtattr *rtattr_add(struct nlmsghdr *nh, unsigned short type,  in rtattr_add()  argument
175 		(struct rtattr *)((uint8_t *)nh + RTA_ALIGN(nh->nlmsg_len));  in rtattr_add()
178 	nh->nlmsg_len = RTA_ALIGN(nh->nlmsg_len) + RTA_ALIGN(rta->rta_len);  in rtattr_add()
182 static struct rtattr *rtattr_add_str(struct nlmsghdr *nh, unsigned short type,  in rtattr_add_str()  argument
185 	struct rtattr *rta = rtattr_add(nh, type, strlen(s));  in rtattr_add_str()
191 static struct rtattr *rtattr_begin(struct nlmsghdr *nh, unsigned short type)  in rtattr_begin()  argument
193 	return rtattr_add(nh, type, 0);  in rtattr_begin()
196 static void rtattr_end(struct nlmsghdr *nh, struct rtattr *attr)  in rtattr_end()  argument
198 	uint8_t *end = (uint8_t *)nh + nh->nlmsg_len;  in rtattr_end()
206 		struct nlmsghdr nh;  in setup_xfrmi_external_dev()  member
213 	struct nlmsghdr *nh;  in setup_xfrmi_external_dev()  local
216 	nh = &req.nh;  in setup_xfrmi_external_dev()
217 	nh->nlmsg_len = NLMSG_LENGTH(sizeof(req.info));  in setup_xfrmi_external_dev()
218 	nh->nlmsg_type = RTM_NEWLINK;  in setup_xfrmi_external_dev()
219 	nh->nlmsg_flags |= NLM_F_CREATE | NLM_F_REQUEST;  in setup_xfrmi_external_dev()
221 	rtattr_add_str(nh, IFLA_IFNAME, "ipsec0");  in setup_xfrmi_external_dev()
222 	link_info = rtattr_begin(nh, IFLA_LINKINFO);  in setup_xfrmi_external_dev()
223 	rtattr_add_str(nh, IFLA_INFO_KIND, "xfrm");  in setup_xfrmi_external_dev()
224 	info_data = rtattr_begin(nh, IFLA_INFO_DATA);  in setup_xfrmi_external_dev()
225 	rtattr_add(nh, IFLA_XFRM_COLLECT_METADATA, 0);  in setup_xfrmi_external_dev()
226 	rtattr_end(nh, info_data);  in setup_xfrmi_external_dev()
227 	rtattr_end(nh, link_info);  in setup_xfrmi_external_dev()
236 	ret = send(sock, nh, nh->nlmsg_len, 0);  in setup_xfrmi_external_dev()
237 	if (!ASSERT_EQ(ret, nh->nlmsg_len, "netlink send length"))  in setup_xfrmi_external_dev()