mdw@git.distorted.org.uk Git - secnet/blob - netlink.h

   1 #ifndef netlink_h
   2 #define netlink_h
   3
   4 #include "ipaddr.h"
   5
   6 #define DEFAULT_BUFSIZE 2048
   7 #define DEFAULT_MTU 1000
   8 #define ICMP_BUFSIZE 1024
   9
  10 struct netlink;
  11
  12 struct netlink_client {
  13     closure_t cl;
  14     struct netlink_if ops;
  15     struct netlink *nst;
  16     struct subnet_list networks;
  17     netlink_deliver_fn *deliver;
  18     void *dst;
  19     string_t name;
  20     uint32_t link_quality;
  21     uint32_t options;
  22     struct netlink_client *next;
  23 };
  24
  25 struct netlink_route {
  26     struct subnet net;
  27     bool_t hard;
  28     bool_t allow_route;
  29     bool_t up;
  30     bool_t kup;
  31     uint32_t quality; /* provided by client */
  32     uint32_t outcount;
  33     struct netlink_client *c;
  34 };
  35
  36 typedef bool_t netlink_route_fn(void *cst, struct netlink_route *route);
  37
  38 /* Netlink provides one function to the device driver, to call to deliver
  39    a packet from the device. The device driver provides one function to
  40    netlink, for it to call to deliver a packet to the device. */
  41
  42 struct netlink {
  43     closure_t cl;
  44     void *dst; /* Pointer to host interface state */
  45     string_t name;
  46     uint32_t max_start_pad;
  47     uint32_t max_end_pad;
  48     struct subnet_list networks;
  49     struct subnet_list exclude_remote_networks;
  50     uint32_t secnet_address; /* our own address, or the address of the
  51                                 other end of a point-to-point link */
  52     bool_t ptp;
  53     uint32_t mtu;
  54     struct netlink_client *clients;
  55     netlink_deliver_fn *deliver_to_host; /* Provided by driver */
  56     netlink_route_fn *set_route; /* Provided by driver */
  57     struct buffer_if icmp; /* Buffer for assembly of outgoing ICMP */
  58     uint32_t n_routes; /* How many routes do we know about? */
  59     struct netlink_route *routes;
  60     uint32_t outcount; /* Packets sent to host */
  61     uint32_t localcount; /* Packets sent to secnet */
  62 };
  63
  64 extern netlink_deliver_fn *netlink_init(struct netlink *st,
  65                                         void *dst, struct cloc loc,
  66                                         dict_t *dict, string_t description,
  67                                         netlink_route_fn *set_route,
  68                                         netlink_deliver_fn *to_host);
  69
  70 #endif /* netlink_h */