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 ipset *networks;
  17     struct subnet_list *subnets; /* Same information as 'networks' */
  18     netlink_deliver_fn *deliver;
  19     void *dst;
  20     string_t name;
  21     uint32_t link_quality;
  22     uint32_t options;
  23     struct netlink_client *next;
  24 };
  25
  26 struct netlink_route {
  27     struct subnet net;
  28     bool_t hard;
  29     bool_t allow_route;
  30     bool_t up;
  31     bool_t kup;
  32     uint32_t quality; /* provided by client */
  33     uint32_t outcount;
  34     struct netlink_client *c;
  35 };
  36
  37 typedef bool_t netlink_route_fn(void *cst, struct netlink_route *route);
  38
  39 /* Netlink provides one function to the device driver, to call to deliver
  40    a packet from the device. The device driver provides one function to
  41    netlink, for it to call to deliver a packet to the device. */
  42
  43 struct netlink {
  44     closure_t cl;
  45     void *dst; /* Pointer to host interface state */
  46     string_t name;
  47     uint32_t max_start_pad;
  48     uint32_t max_end_pad;
  49     struct ipset *networks; /* Local networks */
  50     struct subnet_list *subnets; /* Same information as networks */
  51     struct ipset *remote_networks; /* Allowable remote networks */
  52     uint32_t secnet_address; /* our own address, or the address of the
  53                                 other end of a point-to-point link */
  54     bool_t ptp;
  55     uint32_t mtu;
  56     struct netlink_client *clients;
  57     netlink_deliver_fn *deliver_to_host; /* Provided by driver */
  58     netlink_route_fn *set_route; /* Provided by driver */
  59     struct buffer_if icmp; /* Buffer for assembly of outgoing ICMP */
  60     uint32_t n_routes; /* How many routes do we know about? */
  61     struct netlink_route *routes;
  62     uint32_t outcount; /* Packets sent to host */
  63     uint32_t localcount; /* Packets sent to secnet */
  64 };
  65
  66 extern netlink_deliver_fn *netlink_init(struct netlink *st,
  67                                         void *dst, struct cloc loc,
  68                                         dict_t *dict, string_t description,
  69                                         netlink_route_fn *set_route,
  70                                         netlink_deliver_fn *to_host);
  71
  72 #endif /* netlink_h */