merging modularized kernel interface back to trunk
This commit is contained in:
Tobias Brunner
+166
-2943
File diff suppressed because it is too large
Load Diff
@@ -26,45 +26,37 @@
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#ifndef KERNEL_INTERFACE_H_
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#define KERNEL_INTERFACE_H_
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typedef enum policy_dir_t policy_dir_t;
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typedef struct kernel_interface_t kernel_interface_t;
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#include <utils/host.h>
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#include <crypto/prf_plus.h>
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#include <encoding/payloads/proposal_substructure.h>
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#include <kernel/kernel_ipsec.h>
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#include <kernel/kernel_net.h>
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/**
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* Direction of a policy. These are equal to those
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* defined in xfrm.h, but we want to stay implementation
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* neutral here.
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* Constructor function for ipsec kernel interface
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*/
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enum policy_dir_t {
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/** Policy for inbound traffic */
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POLICY_IN = 0,
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/** Policy for outbound traffic */
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POLICY_OUT = 1,
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/** Policy for forwarded traffic */
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POLICY_FWD = 2,
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};
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typedef kernel_ipsec_t* (*kernel_ipsec_constructor_t)(void);
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/**
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* Interface to the kernel.
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* Constructor function for network kernel interface
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*/
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typedef kernel_net_t* (*kernel_net_constructor_t)(void);
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/**
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* Manager and wrapper for different kernel interfaces.
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*
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* The kernel interface handles the communication with the kernel
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* for SA and policy management. It allows setup of these, and provides
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* further the handling of kernel events.
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* Policy information are cached in the interface. This is necessary to do
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* reference counting. The Linux kernel does not allow the same policy
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* installed twice, but we need this as CHILD_SA exist multiple times
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* when rekeying. Thats why we do reference counting of policies.
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* for SA and policy management and interface and IP address management.
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*/
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struct kernel_interface_t {
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/**
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* Get a SPI from the kernel.
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*
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* @warning get_spi() implicitely creates an SA with
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* @warning get_spi() implicitly creates an SA with
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* the allocated SPI, therefore the replace flag
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* in add_sa() must be set when installing this SA.
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*
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@@ -107,7 +99,7 @@ struct kernel_interface_t {
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* @param protocol protocol for this SA (ESP/AH)
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* @param reqid unique ID for this SA
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* @param expire_soft lifetime in seconds before rekeying
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* @param expire_hard lieftime in seconds before delete
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* @param expire_hard lifetime in seconds before delete
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* @param enc_alg Algorithm to use for encryption (ESP only)
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* @param enc_size key length of encryption algorithm, if dynamic
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* @param int_alg Algorithm to use for integrity protection
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@@ -167,7 +159,7 @@ struct kernel_interface_t {
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protocol_id_t protocol, u_int32_t *use_time);
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/**
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* Delete a previusly installed SA from the SAD.
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* Delete a previously installed SA from the SAD.
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*
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* @param dst destination address for this SA
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* @param spi SPI allocated by us or remote peer
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@@ -189,7 +181,7 @@ struct kernel_interface_t {
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* @param dst_ts traffic selector to match traffic dest
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* @param direction direction of traffic, POLICY_IN, POLICY_OUT, POLICY_FWD
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* @param protocol protocol to use to protect traffic (AH/ESP)
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* @param reqid uniqe ID of an SA to use to enforce policy
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* @param reqid unique ID of an SA to use to enforce policy
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* @param high_prio if TRUE, uses a higher priority than any with FALSE
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* @param mode mode of SA (tunnel, transport)
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* @param ipcomp the IPComp transform used
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@@ -249,6 +241,17 @@ struct kernel_interface_t {
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*/
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host_t* (*get_source_addr)(kernel_interface_t *this, host_t *dest);
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/**
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* Get the next hop for a destination.
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*
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* Does a route lookup to get the next hop used to reach dest.
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* The returned host is allocated and must be destroyed.
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*
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* @param dest target destination address
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* @return next hop address, NULL if unreachable
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*/
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host_t* (*get_nexthop)(kernel_interface_t *this, host_t *dest);
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/**
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* Get the interface name of a local address.
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*
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@@ -258,15 +261,18 @@ struct kernel_interface_t {
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char* (*get_interface) (kernel_interface_t *this, host_t *host);
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/**
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* Creates an iterator over all local addresses.
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*
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* Creates an enumerator over all local addresses.
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*
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* This function blocks an internal cached address list until the
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* iterator gets destroyed.
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* These hosts are read-only, do not modify or free.
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*
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* @return iterator over host_t's
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* enumerator gets destroyed.
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* The hosts are read-only, do not modify of free.
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*
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* @param include_down_ifaces TRUE to enumerate addresses from down interfaces
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* @param include_virtual_ips TRUE to enumerate virtual ip addresses
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* @return enumerator over host_t's
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*/
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iterator_t *(*create_address_iterator) (kernel_interface_t *this);
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enumerator_t *(*create_address_enumerator) (kernel_interface_t *this,
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bool include_down_ifaces, bool include_virtual_ips);
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/**
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* Add a virtual IP to an interface.
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@@ -294,9 +300,73 @@ struct kernel_interface_t {
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status_t (*del_ip) (kernel_interface_t *this, host_t *virtual_ip);
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/**
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* Destroys a kernel_interface object.
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* Add a route.
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*
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* @param dst_net destination net
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* @param prefixlen destination net prefix length
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* @param gateway gateway for this route
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* @param src_ip sourc ip of the route
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* @param if_name name of the interface the route is bound to
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* @return SUCCESS if operation completed
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* ALREADY_DONE if the route already exists
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*/
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void (*destroy) (kernel_interface_t *kernel_interface);
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status_t (*add_route) (kernel_interface_t *this, chunk_t dst_net, u_int8_t prefixlen,
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host_t *gateway, host_t *src_ip, char *if_name);
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/**
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* Delete a route.
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*
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* @param dst_net destination net
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* @param prefixlen destination net prefix length
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* @param gateway gateway for this route
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* @param src_ip sourc ip of the route
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* @param if_name name of the interface the route is bound to
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* @return SUCCESS if operation completed
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*/
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status_t (*del_route) (kernel_interface_t *this, chunk_t dst_net, u_int8_t prefixlen,
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host_t *gateway, host_t *src_ip, char *if_name);
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/**
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* manager methods
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*/
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/**
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* Register an ipsec kernel interface constructor on the manager.
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*
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* @param create constructor to register
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*/
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void (*add_ipsec_interface)(kernel_interface_t *this, kernel_ipsec_constructor_t create);
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/**
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* Unregister an ipsec kernel interface constructor.
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*
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* @param create constructor to unregister
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*/
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void (*remove_ipsec_interface)(kernel_interface_t *this, kernel_ipsec_constructor_t create);
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/**
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* Register a network kernel interface constructor on the manager.
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*
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* @param create constructor to register
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*/
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void (*add_net_interface)(kernel_interface_t *this, kernel_net_constructor_t create);
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/**
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* Unregister a network kernel interface constructor.
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*
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* @param create constructor to unregister
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*/
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void (*remove_net_interface)(kernel_interface_t *this, kernel_net_constructor_t create);
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/**
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* Create the kernel interfaces classes.
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*/
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void (*create_interfaces)(kernel_interface_t *this);
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/**
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* Destroys a kernel_interface_manager_t object.
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*/
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void (*destroy) (kernel_interface_t *this);
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};
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/**
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@@ -304,4 +374,4 @@ struct kernel_interface_t {
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*/
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kernel_interface_t *kernel_interface_create(void);
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#endif /*KERNEL_INTERFACE_H_ @} */
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#endif /* KERNEL_INTERFACE_H_ @} */
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@@ -0,0 +1,246 @@
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/*
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* Copyright (C) 2006-2008 Tobias Brunner
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* Copyright (C) 2006 Daniel Roethlisberger
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* Copyright (C) 2005-2006 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* $Id$
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*/
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/**
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* @defgroup kernel_ipsec kernel_ipsec
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* @{ @ingroup kernel
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*/
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#ifndef KERNEL_IPSEC_H_
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#define KERNEL_IPSEC_H_
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typedef enum policy_dir_t policy_dir_t;
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typedef struct kernel_ipsec_t kernel_ipsec_t;
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#include <utils/host.h>
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#include <crypto/prf_plus.h>
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#include <encoding/payloads/proposal_substructure.h>
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/**
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* Direction of a policy. These are equal to those
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* defined in xfrm.h, but we want to stay implementation
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* neutral here.
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*/
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enum policy_dir_t {
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/** Policy for inbound traffic */
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POLICY_IN = 0,
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/** Policy for outbound traffic */
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POLICY_OUT = 1,
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/** Policy for forwarded traffic */
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POLICY_FWD = 2,
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};
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/**
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* Interface to the ipsec subsystem of the kernel.
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*
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* The kernel ipsec interface handles the communication with the kernel
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* for SA and policy management. It allows setup of these, and provides
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* further the handling of kernel events.
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* Policy information are cached in the interface. This is necessary to do
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* reference counting. The Linux kernel does not allow the same policy
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* installed twice, but we need this as CHILD_SA exist multiple times
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* when rekeying. Thats why we do reference counting of policies.
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*/
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struct kernel_ipsec_t {
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/**
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* Get a SPI from the kernel.
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*
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* @warning get_spi() implicitly creates an SA with
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* the allocated SPI, therefore the replace flag
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* in add_sa() must be set when installing this SA.
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*
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* @param src source address of SA
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* @param dst destination address of SA
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* @param protocol protocol for SA (ESP/AH)
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* @param reqid unique ID for this SA
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* @param spi allocated spi
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* @return SUCCESS if operation completed
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*/
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status_t (*get_spi)(kernel_ipsec_t *this, host_t *src, host_t *dst,
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protocol_id_t protocol, u_int32_t reqid, u_int32_t *spi);
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/**
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* Get a Compression Parameter Index (CPI) from the kernel.
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*
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* @param src source address of SA
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* @param dst destination address of SA
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* @param reqid unique ID for the corresponding SA
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* @param cpi allocated cpi
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* @return SUCCESS if operation completed
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*/
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status_t (*get_cpi)(kernel_ipsec_t *this, host_t *src, host_t *dst,
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u_int32_t reqid, u_int16_t *cpi);
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/**
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* Add an SA to the SAD.
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*
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* add_sa() may update an already allocated
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* SPI (via get_spi). In this case, the replace
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* flag must be set.
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* This function does install a single SA for a
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* single protocol in one direction. The kernel-interface
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* gets the keys itself from the PRF, as we don't know
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* his algorithms and key sizes.
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*
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* @param src source address for this SA
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* @param dst destination address for this SA
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* @param spi SPI allocated by us or remote peer
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* @param protocol protocol for this SA (ESP/AH)
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* @param reqid unique ID for this SA
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* @param expire_soft lifetime in seconds before rekeying
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* @param expire_hard lifetime in seconds before delete
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* @param enc_alg Algorithm to use for encryption (ESP only)
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* @param enc_size key length of encryption algorithm, if dynamic
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* @param int_alg Algorithm to use for integrity protection
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* @param int_size key length of integrity algorithm, if dynamic
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* @param prf_plus PRF to derive keys from
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* @param mode mode of the SA (tunnel, transport)
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* @param ipcomp IPComp transform to use
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* @param encap enable UDP encapsulation for NAT traversal
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* @param replace Should an already installed SA be updated?
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* @return SUCCESS if operation completed
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*/
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status_t (*add_sa) (kernel_ipsec_t *this,
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host_t *src, host_t *dst, u_int32_t spi,
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protocol_id_t protocol, u_int32_t reqid,
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u_int64_t expire_soft, u_int64_t expire_hard,
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u_int16_t enc_alg, u_int16_t enc_size,
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u_int16_t int_alg, u_int16_t int_size,
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prf_plus_t *prf_plus, mode_t mode,
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u_int16_t ipcomp, bool encap,
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bool update);
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/**
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* Update the hosts on an installed SA.
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*
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* We cannot directly update the destination address as the kernel
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* requires the spi, the protocol AND the destination address (and family)
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* to identify SAs. Therefore if the destination address changed we
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* create a new SA and delete the old one.
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*
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* @param spi SPI of the SA
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* @param protocol protocol for this SA (ESP/AH)
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* @param src current source address
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* @param dst current destination address
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* @param new_src new source address
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* @param new_dst new destination address
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* @param encap use UDP encapsulation
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* @return SUCCESS if operation completed
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*/
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status_t (*update_sa)(kernel_ipsec_t *this,
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u_int32_t spi, protocol_id_t protocol,
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host_t *src, host_t *dst,
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host_t *new_src, host_t *new_dst, bool encap);
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/**
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* Query the use time of an SA.
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*
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* The use time of an SA is not the time of the last usage, but
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* the time of the first usage of the SA.
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*
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* @param dst destination address for this SA
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* @param spi SPI allocated by us or remote peer
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* @param protocol protocol for this SA (ESP/AH)
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* @param use_time pointer receives the time of this SA's last use
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* @return SUCCESS if operation completed
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*/
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status_t (*query_sa) (kernel_ipsec_t *this, host_t *dst, u_int32_t spi,
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protocol_id_t protocol, u_int32_t *use_time);
|
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|
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/**
|
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* Delete a previusly installed SA from the SAD.
|
||||
*
|
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* @param dst destination address for this SA
|
||||
* @param spi SPI allocated by us or remote peer
|
||||
* @param protocol protocol for this SA (ESP/AH)
|
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* @return SUCCESS if operation completed
|
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*/
|
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status_t (*del_sa) (kernel_ipsec_t *this, host_t *dst, u_int32_t spi,
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protocol_id_t protocol);
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/**
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* Add a policy to the SPD.
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*
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* A policy is always associated to an SA. Traffic which matches a
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* policy is handled by the SA with the same reqid.
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*
|
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* @param src source address of SA
|
||||
* @param dst dest address of SA
|
||||
* @param src_ts traffic selector to match traffic source
|
||||
* @param dst_ts traffic selector to match traffic dest
|
||||
* @param direction direction of traffic, POLICY_IN, POLICY_OUT, POLICY_FWD
|
||||
* @param protocol protocol to use to protect traffic (AH/ESP)
|
||||
* @param reqid unique ID of an SA to use to enforce policy
|
||||
* @param high_prio if TRUE, uses a higher priority than any with FALSE
|
||||
* @param mode mode of SA (tunnel, transport)
|
||||
* @param ipcomp the IPComp transform used
|
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* @return SUCCESS if operation completed
|
||||
*/
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status_t (*add_policy) (kernel_ipsec_t *this,
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host_t *src, host_t *dst,
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traffic_selector_t *src_ts,
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traffic_selector_t *dst_ts,
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policy_dir_t direction, protocol_id_t protocol,
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u_int32_t reqid, bool high_prio, mode_t mode,
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u_int16_t ipcomp);
|
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/**
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* Query the use time of a policy.
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*
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* The use time of a policy is the time the policy was used
|
||||
* for the last time.
|
||||
*
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||||
* @param src_ts traffic selector to match traffic source
|
||||
* @param dst_ts traffic selector to match traffic dest
|
||||
* @param direction direction of traffic, POLICY_IN, POLICY_OUT, POLICY_FWD
|
||||
* @param[out] use_time the time of this SA's last use
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||||
* @return SUCCESS if operation completed
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*/
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status_t (*query_policy) (kernel_ipsec_t *this,
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traffic_selector_t *src_ts,
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traffic_selector_t *dst_ts,
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policy_dir_t direction, u_int32_t *use_time);
|
||||
|
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/**
|
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* Remove a policy from the SPD.
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*
|
||||
* The kernel interface implements reference counting for policies.
|
||||
* If the same policy is installed multiple times (in the case of rekeying),
|
||||
* the reference counter is increased. del_policy() decreases the ref counter
|
||||
* and removes the policy only when no more references are available.
|
||||
*
|
||||
* @param src_ts traffic selector to match traffic source
|
||||
* @param dst_ts traffic selector to match traffic dest
|
||||
* @param direction direction of traffic, POLICY_IN, POLICY_OUT, POLICY_FWD
|
||||
* @return SUCCESS if operation completed
|
||||
*/
|
||||
status_t (*del_policy) (kernel_ipsec_t *this,
|
||||
traffic_selector_t *src_ts,
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||||
traffic_selector_t *dst_ts,
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||||
policy_dir_t direction);
|
||||
|
||||
/**
|
||||
* Destroy the implementation.
|
||||
*/
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||||
void (*destroy) (kernel_ipsec_t *this);
|
||||
};
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||||
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||||
#endif /* KERNEL_IPSEC_H_ @} */
|
||||
@@ -0,0 +1,142 @@
|
||||
/*
|
||||
* Copyright (C) 2008 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.
|
||||
*
|
||||
* $Id$
|
||||
*/
|
||||
|
||||
/**
|
||||
* @defgroup kernel_net kernel_net
|
||||
* @{ @ingroup kernel
|
||||
*/
|
||||
|
||||
#ifndef KERNEL_NET_H_
|
||||
#define KERNEL_NET_H_
|
||||
|
||||
typedef struct kernel_net_t kernel_net_t;
|
||||
|
||||
#include <utils/enumerator.h>
|
||||
#include <utils/host.h>
|
||||
|
||||
/**
|
||||
* 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 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.
|
||||
*
|
||||
* @param dest target destination address
|
||||
* @return outgoing source address, NULL if unreachable
|
||||
*/
|
||||
host_t* (*get_source_addr)(kernel_net_t *this, host_t *dest);
|
||||
|
||||
/**
|
||||
* 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.
|
||||
*
|
||||
* @param dest target destination address
|
||||
* @return next hop address, NULL if unreachable
|
||||
*/
|
||||
host_t* (*get_nexthop)(kernel_net_t *this, host_t *dest);
|
||||
|
||||
/**
|
||||
* Get the interface name of a local address.
|
||||
*
|
||||
* @param host address to get interface name from
|
||||
* @return allocated interface name, or NULL if not found
|
||||
*/
|
||||
char* (*get_interface) (kernel_net_t *this, host_t *host);
|
||||
|
||||
/**
|
||||
* 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 include_down_ifaces TRUE to enumerate addresses from down interfaces
|
||||
* @param include_virtual_ips TRUE to enumerate virtual ip addresses
|
||||
* @return enumerator over host_t's
|
||||
*/
|
||||
enumerator_t *(*create_address_enumerator) (kernel_net_t *this,
|
||||
bool include_down_ifaces, bool include_virtual_ips);
|
||||
|
||||
/**
|
||||
* 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().
|
||||
* The virtual IP is attached to the interface where the iface_ip is found.
|
||||
*
|
||||
* @param virtual_ip virtual ip address to assign
|
||||
* @param iface_ip IP of an interface to attach virtual IP
|
||||
* @return SUCCESS if operation completed
|
||||
*/
|
||||
status_t (*add_ip) (kernel_net_t *this, host_t *virtual_ip,
|
||||
host_t *iface_ip);
|
||||
|
||||
/**
|
||||
* Remove a virtual IP from an interface.
|
||||
*
|
||||
* The kernel interface uses refcounting, see add_ip().
|
||||
*
|
||||
* @param virtual_ip virtual ip address to assign
|
||||
* @return SUCCESS if operation completed
|
||||
*/
|
||||
status_t (*del_ip) (kernel_net_t *this, host_t *virtual_ip);
|
||||
|
||||
/**
|
||||
* Add a route.
|
||||
*
|
||||
* @param dst_net destination net
|
||||
* @param prefixlen destination net prefix length
|
||||
* @param gateway gateway for this route
|
||||
* @param src_ip sourc 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 sourc 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);
|
||||
};
|
||||
|
||||
#endif /* KERNEL_NET_H_ @} */
|
||||
Reference in New Issue
Block a user