chiark / gitweb /
Static buffers: Provide new rotating static buffer macros
[secnet] / netlink.h
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1#ifndef netlink_h
2#define netlink_h
3
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4#include "ipaddr.h"
5
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6#define DEFAULT_BUFSIZE 2048
7#define DEFAULT_MTU 1000
8#define ICMP_BUFSIZE 1024
9
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10struct netlink;
11
9d3a4132 12struct netlink_client {
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13 closure_t cl;
14 struct netlink_if ops;
15 struct netlink *nst;
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16 struct ipset *networks;
17 struct subnet_list *subnets; /* Same information as 'networks' */
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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. */
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22 netlink_deliver_fn *deliver;
23 void *dst;
24 string_t name;
25 uint32_t link_quality;
1caa23ff 26 int32_t mtu;
3454dce4 27 uint32_t options;
469fd1d9 28 uint32_t outcount;
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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;
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32};
33
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34/* options field in 'struct netlink_client' */
35#define OPT_SOFTROUTE 1
36#define OPT_ALLOWROUTE 2
37
d3fe100d 38typedef bool_t netlink_route_fn(void *cst, struct netlink_client *routes);
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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
44struct netlink {
45 closure_t cl;
9d3a4132 46 void *dst; /* Pointer to host interface state */
fe5e9cc4 47 cstring_t name;
794f2398 48 struct ipset *networks; /* Local networks */
d3fe100d 49 struct subnet_list *subnets; /* Same as networks, for display */
794f2398 50 struct ipset *remote_networks; /* Allowable remote networks */
091433c6 51 uint32_t local_address; /* host interface address */
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52 uint32_t secnet_address; /* our own address, or the address of the
53 other end of a point-to-point link */
c6f79b17 54 bool_t ptp;
1caa23ff 55 int32_t mtu;
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56 struct netlink_client *clients; /* Linked list of clients */
57 struct netlink_client **routes; /* Array of clients, sorted by priority */
1caa23ff 58 int32_t n_clients;
9d3a4132 59 netlink_deliver_fn *deliver_to_host; /* Provided by driver */
d3fe100d 60 netlink_route_fn *set_routes; /* Provided by driver */
9d3a4132 61 struct buffer_if icmp; /* Buffer for assembly of outgoing ICMP */
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62 uint32_t outcount; /* Packets sent to host */
63 uint32_t localcount; /* Packets sent to secnet */
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64};
65
66extern netlink_deliver_fn *netlink_init(struct netlink *st,
67 void *dst, struct cloc loc,
fe5e9cc4 68 dict_t *dict, cstring_t description,
d3fe100d 69 netlink_route_fn *set_routes,
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70 netlink_deliver_fn *to_host);
71
72#endif /* netlink_h */