33 static struct rtattr *rtattr_add(struct nlmsghdr *nh, unsigned short type,  in rtattr_add()  argument
37 		(struct rtattr *)((uint8_t *)nh + RTA_ALIGN(nh->nlmsg_len));  in rtattr_add()
40 	nh->nlmsg_len = RTA_ALIGN(nh->nlmsg_len) + RTA_ALIGN(rta->rta_len);  in rtattr_add()
44 static struct rtattr *rtattr_begin(struct nlmsghdr *nh, unsigned short type)  in rtattr_begin()  argument
46 	return rtattr_add(nh, type, 0);  in rtattr_begin()
49 static void rtattr_end(struct nlmsghdr *nh, struct rtattr *attr)  in rtattr_end()  argument
51 	uint8_t *end = (uint8_t *)nh + nh->nlmsg_len;  in rtattr_end()
56 static struct rtattr *rtattr_add_str(struct nlmsghdr *nh, unsigned short type,  in rtattr_add_str()  argument
59 	struct rtattr *rta = rtattr_add(nh, type, strlen(s));  in rtattr_add_str()
65 static struct rtattr *rtattr_add_strsz(struct nlmsghdr *nh, unsigned short type,  in rtattr_add_strsz()  argument
68 	struct rtattr *rta = rtattr_add(nh, type, strlen(s) + 1);  in rtattr_add_strsz()
74 static struct rtattr *rtattr_add_any(struct nlmsghdr *nh, unsigned short type,  in rtattr_add_any()  argument
77 	struct rtattr *rta = rtattr_add(nh, type, len);  in rtattr_add_any()
84 		      int (*fill_rtattr)(struct nlmsghdr *nh),  in dev_create()  argument
85 		      int (*fill_info_data)(struct nlmsghdr *nh))  in dev_create()  argument
88 		struct nlmsghdr nh;  in dev_create()  member
102 	req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));  in dev_create()
103 	req.nh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE;  in dev_create()
104 	req.nh.nlmsg_type = RTM_NEWLINK;  in dev_create()
112 	rtattr_add_str(&req.nh, IFLA_IFNAME, dev);  in dev_create()
115 		ret = fill_rtattr(&req.nh);  in dev_create()
120 	link_info = rtattr_begin(&req.nh, IFLA_LINKINFO);  in dev_create()
122 	rtattr_add_strsz(&req.nh, IFLA_INFO_KIND, link_type);  in dev_create()
125 		info_data = rtattr_begin(&req.nh, IFLA_INFO_DATA);  in dev_create()
126 		ret = fill_info_data(&req.nh);  in dev_create()
129 		rtattr_end(&req.nh, info_data);  in dev_create()
132 	rtattr_end(&req.nh, link_info);  in dev_create()
134 	ret = send(rtnl, &req, req.nh.nlmsg_len, 0);  in dev_create()
137 	ret = (unsigned int)ret != req.nh.nlmsg_len;  in dev_create()
146 		struct nlmsghdr nh;  in dev_delete()  member
159 	req.nh.nlmsg_len = NLMSG_LENGTH(sizeof(req.info));  in dev_delete()
160 	req.nh.nlmsg_flags = NLM_F_REQUEST;  in dev_delete()
161 	req.nh.nlmsg_type = RTM_DELLINK;  in dev_delete()
165 	rtattr_add_str(&req.nh, IFLA_IFNAME, dev);  in dev_delete()
167 	ret = send(rtnl, &req, req.nh.nlmsg_len, 0);  in dev_delete()
171 	ret = (unsigned int)ret != req.nh.nlmsg_len;  in dev_delete()
177 static int macvtap_fill_rtattr(struct nlmsghdr *nh)  in macvtap_fill_rtattr()  argument
187 	rtattr_add_any(nh, IFLA_LINK, &ifindex, sizeof(ifindex));  in macvtap_fill_rtattr()
188 	rtattr_add_any(nh, IFLA_ADDRESS, param_hwaddr_src, ETH_ALEN);  in macvtap_fill_rtattr()