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-rw-r--r--src/libhydra/kernel/kernel_net.h196
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diff --git a/src/libhydra/kernel/kernel_net.h b/src/libhydra/kernel/kernel_net.h
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-/*
- * Copyright (C) 2008-2012 Tobias Brunner
- * Copyright (C) 2007 Martin Willi
- * Hochschule fuer Technik Rapperswil
- *
- * This program 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 2 of the License, or (at your
- * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
- *
- * This program 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.
- */
-
-/**
- * @defgroup kernel_net kernel_net
- * @{ @ingroup hkernel
- */
-
-#ifndef KERNEL_NET_H_
-#define KERNEL_NET_H_
-
-typedef struct kernel_net_t kernel_net_t;
-typedef enum kernel_address_type_t kernel_address_type_t;
-
-#include <collections/enumerator.h>
-#include <networking/host.h>
-#include <plugins/plugin.h>
-#include <kernel/kernel_interface.h>
-
-/**
- * Type of addresses (e.g. when enumerating them)
- */
-enum kernel_address_type_t {
- /** normal addresses (on regular, up, non-ignored) interfaces */
- ADDR_TYPE_REGULAR = (1 << 0),
- /** addresses on down interfaces */
- ADDR_TYPE_DOWN = (1 << 1),
- /** addresses on ignored interfaces */
- ADDR_TYPE_IGNORED = (1 << 2),
- /** addresses on loopback interfaces */
- ADDR_TYPE_LOOPBACK = (1 << 3),
- /** virtual IP addresses */
- ADDR_TYPE_VIRTUAL = (1 << 4),
- /** to enumerate all available addresses */
- ADDR_TYPE_ALL = (1 << 5) - 1,
-};
-
-/**
- * Interface to the network subsystem of the kernel.
- *
- * The kernel network interface handles the communication with the kernel
- * for interface and IP address management.
- */
-struct kernel_net_t {
-
- /**
- * Get the feature set supported by this kernel backend.
- *
- * @return ORed feature-set of backend
- */
- kernel_feature_t (*get_features)(kernel_net_t *this);
-
- /**
- * Get our outgoing source address for a destination.
- *
- * Does a route lookup to get the source address used to reach dest.
- * The returned host is allocated and must be destroyed.
- * An optional src address can be used to check if a route is available
- * for the given source to dest.
- *
- * @param dest target destination address
- * @param src source address to check, or NULL
- * @return outgoing source address, NULL if unreachable
- */
- host_t* (*get_source_addr)(kernel_net_t *this, host_t *dest, host_t *src);
-
- /**
- * Get the next hop for a destination.
- *
- * Does a route lookup to get the next hop used to reach dest.
- * The returned host is allocated and must be destroyed.
- * An optional src address can be used to check if a route is available
- * for the given source to dest.
- *
- * @param dest target destination address
- * @param prefix prefix length if dest is a subnet, -1 for auto
- * @param src source address to check, or NULL
- * @return next hop address, NULL if unreachable
- */
- host_t* (*get_nexthop)(kernel_net_t *this, host_t *dest, int prefix,
- host_t *src);
-
- /**
- * Get the interface name of a local address. Interfaces that are down or
- * ignored by config are not considered.
- *
- * @param host address to get interface name from
- * @param name allocated interface name (optional)
- * @return TRUE if interface found and usable
- */
- bool (*get_interface) (kernel_net_t *this, host_t *host, char **name);
-
- /**
- * Creates an enumerator over all local addresses.
- *
- * This function blocks an internal cached address list until the
- * enumerator gets destroyed.
- * The hosts are read-only, do not modify of free.
- *
- * @param which a combination of address types to enumerate
- * @return enumerator over host_t's
- */
- enumerator_t *(*create_address_enumerator) (kernel_net_t *this,
- kernel_address_type_t which);
-
- /**
- * Add a virtual IP to an interface.
- *
- * Virtual IPs are attached to an interface. If an IP is added multiple
- * times, the IP is refcounted and not removed until del_ip() was called
- * as many times as add_ip().
- *
- * @param virtual_ip virtual ip address to assign
- * @param prefix prefix length to install with IP address, -1 for auto
- * @param iface interface to install virtual IP on
- * @return SUCCESS if operation completed
- */
- status_t (*add_ip) (kernel_net_t *this, host_t *virtual_ip, int prefix,
- char *iface);
-
- /**
- * Remove a virtual IP from an interface.
- *
- * The kernel interface uses refcounting, see add_ip().
- *
- * @param virtual_ip virtual ip address to remove
- * @param prefix prefix length of the IP to uninstall, -1 for auto
- * @param wait TRUE to wait until IP is gone
- * @return SUCCESS if operation completed
- */
- status_t (*del_ip) (kernel_net_t *this, host_t *virtual_ip, int prefix,
- bool wait);
-
- /**
- * Add a route.
- *
- * @param dst_net destination net
- * @param prefixlen destination net prefix length
- * @param gateway gateway for this route
- * @param src_ip source ip of the route
- * @param if_name name of the interface the route is bound to
- * @return SUCCESS if operation completed
- * ALREADY_DONE if the route already exists
- */
- status_t (*add_route) (kernel_net_t *this, chunk_t dst_net,
- u_int8_t prefixlen, host_t *gateway, host_t *src_ip,
- char *if_name);
-
- /**
- * Delete a route.
- *
- * @param dst_net destination net
- * @param prefixlen destination net prefix length
- * @param gateway gateway for this route
- * @param src_ip source ip of the route
- * @param if_name name of the interface the route is bound to
- * @return SUCCESS if operation completed
- */
- status_t (*del_route) (kernel_net_t *this, chunk_t dst_net,
- u_int8_t prefixlen, host_t *gateway, host_t *src_ip,
- char *if_name);
-
- /**
- * Destroy the implementation.
- */
- void (*destroy) (kernel_net_t *this);
-};
-
-/**
- * Helper function to (un-)register net kernel interfaces from plugin features.
- *
- * This function is a plugin_feature_callback_t and can be used with the
- * PLUGIN_CALLBACK macro to register an net kernel interface constructor.
- *
- * @param plugin plugin registering the kernel interface
- * @param feature associated plugin feature
- * @param reg TRUE to register, FALSE to unregister
- * @param data data passed to callback, an kernel_net_constructor_t
- */
-bool kernel_net_register(plugin_t *plugin, plugin_feature_t *feature,
- bool reg, void *data);
-
-#endif /** KERNEL_NET_H_ @}*/