1#include <stdint.h>
 2
 3/* linux/netlink.h */
 4
 5#define NETLINK_ROUTE 0
 6
 7struct nlmsghdr {
 8	uint32_t	nlmsg_len;
 9	uint16_t	nlmsg_type;
10	uint16_t	nlmsg_flags;
11	uint32_t	nlmsg_seq;
12	uint32_t	nlmsg_pid;
13};
14
15#define NLM_F_REQUEST	1
16#define NLM_F_MULTI	2
17#define NLM_F_ACK	4
18
19#define NLM_F_ROOT	0x100
20#define NLM_F_MATCH	0x200
21#define NLM_F_ATOMIC	0x400
22#define NLM_F_DUMP	(NLM_F_ROOT|NLM_F_MATCH)
23
24#define NLMSG_NOOP	0x1
25#define NLMSG_ERROR	0x2
26#define NLMSG_DONE	0x3
27#define NLMSG_OVERRUN	0x4
28
29/* linux/rtnetlink.h */
30
31#define RTM_NEWLINK	16
32#define RTM_GETLINK	18
33#define RTM_NEWADDR	20
34#define RTM_GETADDR	22
35
36struct rtattr {
37	unsigned short	rta_len;
38	unsigned short	rta_type;
39};
40
41struct rtgenmsg {
42	unsigned char	rtgen_family;
43};
44
45struct ifinfomsg {
46	unsigned char	ifi_family;
47	unsigned char	__ifi_pad;
48	unsigned short	ifi_type;
49	int		ifi_index;
50	unsigned	ifi_flags;
51	unsigned	ifi_change;
52};
53
54/* linux/if_link.h */
55
56#define IFLA_ADDRESS	1
57#define IFLA_BROADCAST	2
58#define IFLA_IFNAME	3
59#define IFLA_STATS	7
60
61/* linux/if_addr.h */
62
63struct ifaddrmsg {
64	uint8_t		ifa_family;
65	uint8_t		ifa_prefixlen;
66	uint8_t		ifa_flags;
67	uint8_t		ifa_scope;
68	uint32_t	ifa_index;
69};
70
71#define IFA_ADDRESS	1
72#define IFA_LOCAL	2
73#define IFA_LABEL	3
74#define IFA_BROADCAST	4
75
76/* musl */
77
78#define NETLINK_ALIGN(len)	(((len)+3) & ~3)
79#define NLMSG_DATA(nlh)		((void*)((char*)(nlh)+sizeof(struct nlmsghdr)))
80#define NLMSG_DATALEN(nlh)	((nlh)->nlmsg_len-sizeof(struct nlmsghdr))
81#define NLMSG_DATAEND(nlh)	((char*)(nlh)+(nlh)->nlmsg_len)
82#define NLMSG_NEXT(nlh)		(struct nlmsghdr*)((char*)(nlh)+NETLINK_ALIGN((nlh)->nlmsg_len))
83#define NLMSG_OK(nlh,end)	((char*)(end)-(char*)(nlh) >= sizeof(struct nlmsghdr))
84
85#define RTA_DATA(rta)		((void*)((char*)(rta)+sizeof(struct rtattr)))
86#define RTA_DATALEN(rta)	((rta)->rta_len-sizeof(struct rtattr))
87#define RTA_DATAEND(rta)	((char*)(rta)+(rta)->rta_len)
88#define RTA_NEXT(rta)		(struct rtattr*)((char*)(rta)+NETLINK_ALIGN((rta)->rta_len))
89#define RTA_OK(rta,end)		((char*)(end)-(char*)(rta) >= sizeof(struct rtattr))
90
91#define NLMSG_RTA(nlh,len)	((void*)((char*)(nlh)+sizeof(struct nlmsghdr)+NETLINK_ALIGN(len)))
92#define NLMSG_RTAOK(rta,nlh)	RTA_OK(rta,NLMSG_DATAEND(nlh))
93
94hidden int __rtnetlink_enumerate(int link_af, int addr_af, int (*cb)(void *ctx, struct nlmsghdr *h), void *ctx);