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     uint32_t priority; /* Higher priority clients have their networks
  19                           checked first during routing.  This allows
  20                           things like laptops to supersede whole
  21                           networks. */
  22     netlink_deliver_fn *deliver;
  23     void *dst;
  24     string_t name;
  25     uint32_t link_quality;
  26     int32_t mtu;
  27     uint32_t options;
  28     uint32_t outcount;
  29     bool_t up; /* Should these routes exist in the kernel? */
  30     bool_t kup; /* Do these routes exist in the kernel? */
  31     struct netlink_client *next;
  32 };
  33
  34 /* options field in 'struct netlink_client' */
  35 #define OPT_SOFTROUTE   1
  36 #define OPT_ALLOWROUTE  2
  37
  38 typedef bool_t netlink_route_fn(void *cst, struct netlink_client *routes);
  39
  40 /* Netlink provides one function to the device driver, to call to deliver
  41    a packet from the device. The device driver provides one function to
  42    netlink, for it to call to deliver a packet to the device. */
  43
  44 struct netlink {
  45     closure_t cl;
  46     void *dst; /* Pointer to host interface state */
  47     cstring_t name;
  48     struct ipset *networks; /* Local networks */
  49     struct subnet_list *subnets; /* Same as networks, for display */
  50     struct ipset *remote_networks; /* Allowable remote networks */
  51     uint32_t local_address; /* host interface address */
  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     int32_t mtu;
  56     struct netlink_client *clients; /* Linked list of clients */
  57     struct netlink_client **routes; /* Array of clients, sorted by priority */
  58     int32_t n_clients;
  59     netlink_deliver_fn *deliver_to_host; /* Provided by driver */
  60     netlink_route_fn *set_routes; /* Provided by driver */
  61     struct buffer_if icmp; /* Buffer for assembly of outgoing ICMP */
  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, cstring_t description,
  69                                         netlink_route_fn *set_routes,
  70                                         netlink_deliver_fn *to_host);
  71
  72 #endif /* netlink_h */