src/network/netlink.h

   1 #include <stdint.h>
   2
   3 /* linux/netlink.h */
   4
   5 #define NETLINK_ROUTE 0
   6
   7 struct 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
  36 struct rtattr {
  37         unsigned short  rta_len;
  38         unsigned short  rta_type;
  39 };
  40
  41 struct rtgenmsg {
  42         unsigned char   rtgen_family;
  43 };
  44
  45 struct 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
  63 struct 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
  94 hidden int __rtnetlink_enumerate(int link_af, int addr_af, int (*cb)(void *ctx, struct nlmsghdr *h), void *ctx);