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(nlh, 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 94int __rtnetlink_enumerate(int link_af, int addr_af, int (*cb)(void* ctx, struct nlmsghdr* h), 95 void* ctx); 96