2 * This file is part of secnet.
3 * See README for full list of copyright holders.
5 * secnet is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or
8 * (at your option) any later version.
10 * secnet is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * version 3 along with secnet; if not, see
17 * https://www.gnu.org/licenses/gpl.html.
25 #define DEFAULT_BUFSIZE 2048
26 #define DEFAULT_MTU 1000
27 #define ICMP_BUFSIZE 1024
31 struct netlink_client {
33 struct netlink_if ops;
35 struct ipset *networks;
36 struct subnet_list *subnets; /* Same information as 'networks' */
37 uint32_t priority; /* Higher priority clients have their networks
38 checked first during routing. This allows
39 things like laptops to supersede whole
41 netlink_deliver_fn *deliver;
44 uint32_t link_quality;
48 bool_t up; /* Should these routes exist in the kernel? */
49 bool_t kup; /* Do these routes exist in the kernel? */
50 struct netlink_client *next;
53 /* options field in 'struct netlink_client' */
54 #define OPT_SOFTROUTE 1
55 #define OPT_ALLOWROUTE 2
57 typedef bool_t netlink_route_fn(void *cst, struct netlink_client *routes);
59 /* Netlink provides one function to the device driver, to call to deliver
60 a packet from the device. The device driver provides one function to
61 netlink, for it to call to deliver a packet to the device. */
65 void *dst; /* Pointer to host interface state */
67 struct ipset *networks; /* Local networks */
68 struct subnet_list *subnets; /* Same as networks, for display */
69 struct ipset *remote_networks; /* Allowable remote networks */
70 uint32_t local_address; /* host interface address */
71 uint32_t secnet_address; /* our own address, or the address of the
72 other end of a point-to-point link */
75 struct netlink_client *clients; /* Linked list of clients */
76 struct netlink_client **routes; /* Array of clients, sorted by priority */
78 netlink_deliver_fn *deliver_to_host; /* Provided by driver */
79 netlink_route_fn *set_routes; /* Provided by driver */
80 struct buffer_if icmp; /* Buffer for assembly of outgoing ICMP */
81 uint32_t outcount; /* Packets sent to host */
82 uint32_t localcount; /* Packets sent to secnet */
85 extern netlink_deliver_fn *netlink_init(struct netlink *st,
86 void *dst, struct cloc loc,
87 dict_t *dict, cstring_t description,
88 netlink_route_fn *set_routes,
89 netlink_deliver_fn *to_host);
91 #endif /* netlink_h */