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/*
* This file is part of secnet.
* See README for full list of copyright holders.
*
* secnet is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* secnet is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* version 3 along with secnet; if not, see
* https://www.gnu.org/licenses/gpl.html.
*/
#ifndef netlink_h
#define netlink_h
#include "ipaddr.h"
#define DEFAULT_BUFSIZE 2048
#define DEFAULT_MTU 1000
#define ICMP_BUFSIZE 1024
struct netlink;
struct netlink_client {
closure_t cl;
struct netlink_if ops;
struct netlink *nst;
struct ipset *networks;
struct subnet_list *subnets; /* Same information as 'networks' */
uint32_t priority; /* Higher priority clients have their networks
checked first during routing. This allows
things like laptops to supersede whole
networks. */
netlink_deliver_fn *deliver;
void *dst;
string_t name;
uint32_t link_quality;
int32_t mtu;
uint32_t options;
uint32_t outcount;
bool_t up; /* Should these routes exist in the kernel? */
bool_t kup; /* Do these routes exist in the kernel? */
struct netlink_client *next;
};
/* options field in 'struct netlink_client' */
#define OPT_SOFTROUTE 1
#define OPT_ALLOWROUTE 2
typedef bool_t netlink_route_fn(void *cst, struct netlink_client *routes);
/* Netlink provides one function to the device driver, to call to deliver
a packet from the device. The device driver provides one function to
netlink, for it to call to deliver a packet to the device. */
struct netlink {
closure_t cl;
void *dst; /* Pointer to host interface state */
cstring_t name;
struct ipset *networks; /* Local networks */
struct subnet_list *subnets; /* Same as networks, for display */
struct ipset *remote_networks; /* Allowable remote networks */
uint32_t local_address; /* host interface address */
uint32_t secnet_address; /* our own address, or the address of the
other end of a point-to-point link */
bool_t ptp;
int32_t mtu;
struct netlink_client *clients; /* Linked list of clients */
struct netlink_client **routes; /* Array of clients, sorted by priority */
int32_t n_clients;
netlink_deliver_fn *deliver_to_host; /* Provided by driver */
netlink_route_fn *set_routes; /* Provided by driver */
struct buffer_if icmp; /* Buffer for assembly of outgoing ICMP */
uint32_t outcount; /* Packets sent to host */
uint32_t localcount; /* Packets sent to secnet */
};
extern netlink_deliver_fn *netlink_init(struct netlink *st,
void *dst, struct cloc loc,
dict_t *dict, cstring_t description,
netlink_route_fn *set_routes,
netlink_deliver_fn *to_host);
#endif /* netlink_h */
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