2005-12-04 19:05:52 +00:00
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/**
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* @file kernel_interface.c
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*
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* @brief Implementation of kernel_interface_t.
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*
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*/
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/*
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2007-02-28 14:04:36 +00:00
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* Copyright (C) 2006-2007 Fabian Hartmann, Noah Heusser
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* Copyright (C) 2006-2007 Tobias Brunner
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* Copyright (C) 2006 Daniel Roethlisberger
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2006-07-07 08:49:06 +00:00
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* Copyright (C) 2005-2006 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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2005-12-04 19:05:52 +00:00
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* Hochschule fuer Technik Rapperswil
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2005-12-13 11:19:48 +00:00
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* Copyright (C) 2003 Herbert Xu.
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*
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* Contains modified parts from pluto.
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2005-12-04 19:05:52 +00:00
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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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#include <sys/types.h>
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#include <sys/socket.h>
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#include <linux/netlink.h>
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2006-06-22 06:36:28 +00:00
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#include <linux/rtnetlink.h>
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2006-07-18 12:53:54 +00:00
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#include <linux/xfrm.h>
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2006-07-10 14:24:04 +00:00
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#include <linux/udp.h>
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2005-12-04 19:05:52 +00:00
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#include <pthread.h>
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2005-12-05 16:09:42 +00:00
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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2007-02-28 14:04:36 +00:00
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include <ifaddrs.h>
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2005-12-04 19:05:52 +00:00
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#include "kernel_interface.h"
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2005-12-05 16:09:42 +00:00
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#include <daemon.h>
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2005-12-04 19:05:52 +00:00
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#include <utils/linked_list.h>
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2006-05-31 14:23:15 +00:00
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#include <queues/jobs/delete_child_sa_job.h>
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#include <queues/jobs/rekey_child_sa_job.h>
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2006-07-21 13:31:53 +00:00
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#include <queues/jobs/acquire_job.h>
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2005-12-04 19:05:52 +00:00
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2006-07-12 11:42:36 +00:00
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/** kernel level protocol identifiers */
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2006-02-16 09:55:07 +00:00
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#define KERNEL_ESP 50
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#define KERNEL_AH 51
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2006-07-12 11:42:36 +00:00
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/** default priority of installed policies */
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2006-09-08 13:10:52 +00:00
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#define PRIO_LOW 3000
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#define PRIO_HIGH 2000
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2006-02-22 16:14:40 +00:00
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2006-06-22 06:36:28 +00:00
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#define BUFFER_SIZE 1024
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2006-03-02 09:56:30 +00:00
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2006-07-12 11:42:36 +00:00
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/**
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* returns a pointer to the first rtattr following the nlmsghdr *nlh and the
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* 'usual' netlink data x like 'struct xfrm_usersa_info'
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*/
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2006-06-22 06:36:28 +00:00
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#define XFRM_RTA(nlh, x) ((struct rtattr*)(NLMSG_DATA(nlh) + NLMSG_ALIGN(sizeof(x))))
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2006-07-12 11:42:36 +00:00
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/**
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* returns a pointer to the next rtattr following rta.
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* !!! do not use this to parse messages. use RTA_NEXT and RTA_OK instead !!!
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*/
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2006-07-04 13:25:00 +00:00
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#define XFRM_RTA_NEXT(rta) ((struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
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2006-07-12 11:42:36 +00:00
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/**
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* returns the total size of attached rta data
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* (after 'usual' netlink data x like 'struct xfrm_usersa_info')
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*/
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2006-06-22 06:36:28 +00:00
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#define XFRM_PAYLOAD(nlh, x) NLMSG_PAYLOAD(nlh, sizeof(x))
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2005-12-04 19:05:52 +00:00
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2006-06-09 07:31:30 +00:00
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typedef struct kernel_algorithm_t kernel_algorithm_t;
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/**
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* Mapping from the algorithms defined in IKEv2 to
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* kernel level algorithm names and their key length
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*/
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struct kernel_algorithm_t {
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/**
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* Identifier specified in IKEv2
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*/
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int ikev2_id;
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/**
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* Name of the algorithm, as used as kernel identifier
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*/
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char *name;
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/**
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* Key length in bits, if fixed size
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*/
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u_int key_size;
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};
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#define END_OF_LIST -1
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/**
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* Algorithms for encryption
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*/
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kernel_algorithm_t encryption_algs[] = {
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/* {ENCR_DES_IV64, "***", 0}, */
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{ENCR_DES, "des", 64},
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{ENCR_3DES, "des3_ede", 192},
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/* {ENCR_RC5, "***", 0}, */
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/* {ENCR_IDEA, "***", 0}, */
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{ENCR_CAST, "cast128", 0},
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{ENCR_BLOWFISH, "blowfish", 0},
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/* {ENCR_3IDEA, "***", 0}, */
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/* {ENCR_DES_IV32, "***", 0}, */
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{ENCR_NULL, "cipher_null", 0},
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{ENCR_AES_CBC, "aes", 0},
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/* {ENCR_AES_CTR, "***", 0}, */
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{END_OF_LIST, NULL, 0},
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};
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/**
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* Algorithms for integrity protection
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*/
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kernel_algorithm_t integrity_algs[] = {
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{AUTH_HMAC_MD5_96, "md5", 128},
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{AUTH_HMAC_SHA1_96, "sha1", 160},
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/* {AUTH_DES_MAC, "***", 0}, */
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/* {AUTH_KPDK_MD5, "***", 0}, */
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/* {AUTH_AES_XCBC_96, "***", 0}, */
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{END_OF_LIST, NULL, 0},
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};
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/**
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* Look up a kernel algorithm name and its key size
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*/
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2006-07-12 11:42:36 +00:00
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char* lookup_algorithm(kernel_algorithm_t *kernel_algo,
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algorithm_t *ikev2_algo, u_int *key_size)
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2006-06-09 07:31:30 +00:00
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{
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while (kernel_algo->ikev2_id != END_OF_LIST)
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{
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if (ikev2_algo->algorithm == kernel_algo->ikev2_id)
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{
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/* match, evaluate key length */
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if (ikev2_algo->key_size)
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{ /* variable length */
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*key_size = ikev2_algo->key_size;
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}
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else
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{ /* fixed length */
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*key_size = kernel_algo->key_size;
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}
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return kernel_algo->name;
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}
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kernel_algo++;
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}
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return NULL;
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}
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2005-12-04 19:05:52 +00:00
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2007-02-28 14:04:36 +00:00
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typedef struct rt_refcount_t rt_refcount_t;
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2006-07-12 11:42:36 +00:00
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2007-02-28 14:04:36 +00:00
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struct rt_refcount_t {
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/** Index of the interface the route is bound to */
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int if_index;
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/** Source ip of the route */
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host_t *src_ip;
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/** Destination net */
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chunk_t dst_net;
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/** Destination net prefixlen */
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u_int8_t prefixlen;
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};
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2006-07-12 11:42:36 +00:00
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typedef struct kernel_policy_t kernel_policy_t;
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/**
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* Installed kernel policy.
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*/
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struct kernel_policy_t {
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/** direction of this policy: in, out, forward */
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u_int8_t direction;
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/** reqid of the policy */
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u_int32_t reqid;
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/** parameters of installed policy */
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struct xfrm_selector sel;
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2007-02-28 14:04:36 +00:00
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/** associated route installed for this policy */
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rt_refcount_t *route;
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2006-07-12 11:42:36 +00:00
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/** by how many CHILD_SA's this policy is used */
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u_int refcount;
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};
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2007-02-28 14:04:36 +00:00
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typedef struct vip_refcount_t vip_refcount_t;
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/**
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* Reference counter for for virtual ips.
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*/
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struct vip_refcount_t {
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/** Index of the interface the ip is bound to */
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u_int8_t if_index;
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/** The ip address */
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host_t *ip;
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/** Number of times this ip is used */
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u_int refcount;
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};
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2006-07-12 11:42:36 +00:00
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2005-12-04 19:05:52 +00:00
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typedef struct private_kernel_interface_t private_kernel_interface_t;
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2006-07-12 11:42:36 +00:00
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/**
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2007-02-28 14:04:36 +00:00
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* Private variables and functions of kernel_interface class.
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2005-12-04 19:05:52 +00:00
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*/
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struct private_kernel_interface_t {
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/**
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2005-12-06 16:36:42 +00:00
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* Public part of the kernel_interface_t object.
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2005-12-04 19:05:52 +00:00
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*/
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2006-02-16 09:55:07 +00:00
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kernel_interface_t public;
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2006-07-12 11:42:36 +00:00
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/**
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* List of installed policies (kernel_policy_t)
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*/
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linked_list_t *policies;
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/**
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* Mutex locks access to policies list.
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*/
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pthread_mutex_t pol_mutex;
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2006-02-16 09:55:07 +00:00
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/**
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2007-02-28 14:04:36 +00:00
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* Netlink communication socket for XFRM IPsec.
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2006-02-16 09:55:07 +00:00
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*/
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2007-02-28 14:04:36 +00:00
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int xfrm_socket;
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/**
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* Netlink communication socket for routing & addresses.
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*/
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int rt_socket;
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2006-02-16 09:55:07 +00:00
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2006-04-12 08:36:40 +00:00
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/**
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* Process id of kernel thread
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*/
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2005-12-05 16:09:42 +00:00
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pid_t pid;
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2006-04-12 08:36:40 +00:00
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2006-02-16 09:55:07 +00:00
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/**
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* Sequence number for messages.
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*/
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u_int32_t seq;
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/**
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* List of responded messages.
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*/
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linked_list_t *responses;
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/**
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2007-02-28 14:04:36 +00:00
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* Thread which receives xfrm messages.
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*/
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pthread_t xfrm_thread;
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/**
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* Thread which receives rt messages.
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2006-02-16 09:55:07 +00:00
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*/
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2007-02-28 14:04:36 +00:00
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pthread_t rt_thread;
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2006-02-16 09:55:07 +00:00
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/**
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* Mutex locks access to replies list.
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*/
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2006-07-12 11:42:36 +00:00
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pthread_mutex_t rep_mutex;
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2006-02-16 09:55:07 +00:00
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/**
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* Condvar allows signaling of threads waiting for a reply.
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*/
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pthread_cond_t condvar;
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2007-02-28 14:04:36 +00:00
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/**
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* List of reference counter objects for all virtual ips.
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*/
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linked_list_t *vips;
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2006-07-12 11:42:36 +00:00
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2007-02-28 14:04:36 +00:00
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/**
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* Mutex to lock access to vip list.
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*/
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pthread_mutex_t vip_mutex;
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};
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2006-07-12 11:42:36 +00:00
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/**
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2007-02-28 14:04:36 +00:00
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* Sends a message down to the kernel and waits for its response
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2006-07-12 11:42:36 +00:00
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*/
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static status_t send_message(private_kernel_interface_t *this,
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2007-02-28 14:04:36 +00:00
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struct nlmsghdr *request,
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struct nlmsghdr **response,
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int socket)
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2006-07-12 11:42:36 +00:00
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{
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size_t length;
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struct sockaddr_nl addr;
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2006-04-12 08:36:40 +00:00
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2006-07-12 11:42:36 +00:00
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request->nlmsg_seq = ++this->seq;
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2007-02-28 14:04:36 +00:00
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request->nlmsg_pid = getpid();
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2006-02-16 09:55:07 +00:00
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2006-07-12 11:42:36 +00:00
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memset(&addr, 0, sizeof(struct sockaddr_nl));
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addr.nl_family = AF_NETLINK;
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addr.nl_pid = 0;
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addr.nl_groups = 0;
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2007-02-28 14:04:36 +00:00
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length = sendto(socket,(void *)request, request->nlmsg_len, 0,
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2006-07-12 11:42:36 +00:00
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(struct sockaddr *)&addr, sizeof(addr));
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if (length < 0)
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{
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return FAILED;
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}
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else if (length != request->nlmsg_len)
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{
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2007-03-02 17:08:38 +00:00
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DBG1(DBG_KNL, "error sending to netlink socket: %m");
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2006-07-12 11:42:36 +00:00
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return FAILED;
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}
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pthread_mutex_lock(&(this->rep_mutex));
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2007-03-02 17:08:38 +00:00
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DBG3(DBG_KNL, "waiting for netlink message with seq: %d",
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request->nlmsg_seq);
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2006-07-12 11:42:36 +00:00
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while (TRUE)
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{
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2006-10-24 14:20:45 +00:00
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iterator_t *iterator;
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struct nlmsghdr *listed_response;
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2006-07-12 11:42:36 +00:00
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bool found = FALSE;
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2006-10-24 14:20:45 +00:00
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|
|
2006-07-12 11:42:36 +00:00
|
|
|
/* search list, break if found */
|
|
|
|
iterator = this->responses->create_iterator(this->responses, TRUE);
|
2006-10-24 14:20:45 +00:00
|
|
|
while (iterator->iterate(iterator, (void**)&listed_response))
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
|
|
|
if (listed_response->nlmsg_seq == request->nlmsg_seq)
|
|
|
|
{
|
|
|
|
/* matches our request, this is the reply */
|
|
|
|
*response = listed_response;
|
|
|
|
iterator->remove(iterator);
|
|
|
|
found = TRUE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
|
|
|
|
if (found)
|
|
|
|
{
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
/* TODO: we should time out, if something goes wrong!??? */
|
|
|
|
pthread_cond_wait(&(this->condvar), &(this->rep_mutex));
|
|
|
|
}
|
|
|
|
|
|
|
|
pthread_mutex_unlock(&(this->rep_mutex));
|
|
|
|
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
static int supersocket;
|
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
/**
|
2007-02-28 14:04:36 +00:00
|
|
|
* Reads from a netlink socket and returns the message in a buffer.
|
2006-07-12 11:42:36 +00:00
|
|
|
*/
|
2007-02-28 14:04:36 +00:00
|
|
|
static void netlink_package_receiver(int socket, unsigned char *response, int response_size)
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
while (TRUE)
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
struct sockaddr_nl addr;
|
|
|
|
socklen_t addr_length;
|
|
|
|
size_t length;
|
|
|
|
addr_length = sizeof(addr);
|
2007-03-02 17:08:38 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
length = recvfrom(socket, response, response_size, 0, (struct sockaddr*)&addr, &addr_length);
|
|
|
|
if (length < 0)
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
if (errno == EINTR)
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
/* interrupted, try again */
|
2007-03-02 17:08:38 +00:00
|
|
|
DBG1(DBG_IKE, "wtf1");
|
2006-07-12 11:42:36 +00:00
|
|
|
continue;
|
|
|
|
}
|
2007-02-28 14:04:36 +00:00
|
|
|
charon->kill(charon, "receiving from netlink socket failed\n");
|
2006-07-12 11:42:36 +00:00
|
|
|
}
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (!NLMSG_OK((struct nlmsghdr *)response, length))
|
|
|
|
{
|
|
|
|
/* bad netlink message */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (addr.nl_pid != 0)
|
|
|
|
{
|
|
|
|
/* not from kernel. not interested, try another one */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
/* good message, handle it */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Takes a Netlink package from the response buffer and writes it to this->responses.
|
|
|
|
* Then it signals all waiting threads.
|
|
|
|
*/
|
|
|
|
static void add_to_package_list(private_kernel_interface_t *this, unsigned char *response)
|
|
|
|
{
|
|
|
|
struct nlmsghdr *hdr = (struct nlmsghdr*)response;
|
|
|
|
/* add response to queue */
|
|
|
|
struct nlmsghdr *listed_response = malloc(hdr->nlmsg_len);
|
|
|
|
memcpy(listed_response, response, hdr->nlmsg_len);
|
|
|
|
|
|
|
|
pthread_mutex_lock(&(this->rep_mutex));
|
|
|
|
this->responses->insert_last(this->responses, (void*)listed_response);
|
|
|
|
pthread_mutex_unlock(&(this->rep_mutex));
|
|
|
|
/* signal ALL waiting threads */
|
|
|
|
pthread_cond_broadcast(&(this->condvar));
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Receives packages from this->xfrm_socket and puts them to this->package_list
|
|
|
|
*/
|
|
|
|
static void receive_xfrm_messages(private_kernel_interface_t *this)
|
|
|
|
{
|
|
|
|
while(TRUE)
|
|
|
|
{
|
|
|
|
unsigned char response[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
netlink_package_receiver(this->xfrm_socket, response, sizeof(response));
|
|
|
|
|
2006-07-21 13:31:53 +00:00
|
|
|
/* we handle ACQUIRE and EXPIRE messages directly */
|
2006-07-12 11:42:36 +00:00
|
|
|
hdr = (struct nlmsghdr*)response;
|
|
|
|
if (hdr->nlmsg_type == XFRM_MSG_ACQUIRE)
|
|
|
|
{
|
2006-07-21 13:31:53 +00:00
|
|
|
u_int32_t reqid = 0;
|
|
|
|
job_t *job;
|
|
|
|
struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_user_acquire);
|
|
|
|
size_t rtsize = XFRM_PAYLOAD(hdr, struct xfrm_user_tmpl);
|
|
|
|
if (RTA_OK(rthdr, rtsize))
|
|
|
|
{
|
|
|
|
if (rthdr->rta_type == XFRMA_TMPL)
|
|
|
|
{
|
|
|
|
struct xfrm_user_tmpl* tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rthdr);
|
|
|
|
reqid = tmpl->reqid;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (reqid == 0)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "received a XFRM_MSG_ACQUIRE, but no reqid found");
|
2006-07-21 13:31:53 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "received a XFRM_MSG_ACQUIRE");
|
|
|
|
DBG1(DBG_KNL, "creating acquire job for CHILD_SA with reqid %d",
|
2006-07-21 13:31:53 +00:00
|
|
|
reqid);
|
|
|
|
job = (job_t*)acquire_job_create(reqid);
|
|
|
|
charon->job_queue->add(charon->job_queue, job);
|
|
|
|
}
|
2006-07-12 11:42:36 +00:00
|
|
|
}
|
|
|
|
else if (hdr->nlmsg_type == XFRM_MSG_EXPIRE)
|
|
|
|
{
|
|
|
|
job_t *job;
|
|
|
|
protocol_id_t protocol;
|
2006-07-21 13:31:53 +00:00
|
|
|
u_int32_t spi, reqid;
|
2006-07-12 11:42:36 +00:00
|
|
|
struct xfrm_user_expire *expire;
|
|
|
|
|
|
|
|
expire = (struct xfrm_user_expire*)NLMSG_DATA(hdr);
|
|
|
|
protocol = expire->state.id.proto == KERNEL_ESP ?
|
|
|
|
PROTO_ESP : PROTO_AH;
|
|
|
|
spi = expire->state.id.spi;
|
2006-07-21 13:31:53 +00:00
|
|
|
reqid = expire->state.reqid;
|
2006-07-12 11:42:36 +00:00
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "received a XFRM_MSG_EXPIRE");
|
|
|
|
DBG1(DBG_KNL, "creating %s job for %N CHILD_SA 0x%x (reqid %d)",
|
2006-07-12 11:42:36 +00:00
|
|
|
expire->hard ? "delete" : "rekey",
|
2006-10-18 11:46:13 +00:00
|
|
|
protocol_id_names, protocol, ntohl(spi),
|
2006-07-21 13:31:53 +00:00
|
|
|
reqid);
|
2006-07-12 11:42:36 +00:00
|
|
|
if (expire->hard)
|
|
|
|
{
|
2006-07-21 13:31:53 +00:00
|
|
|
job = (job_t*)delete_child_sa_job_create(reqid, protocol, spi);
|
2006-07-12 11:42:36 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2006-07-21 13:31:53 +00:00
|
|
|
job = (job_t*)rekey_child_sa_job_create(reqid, protocol, spi);
|
2006-07-12 11:42:36 +00:00
|
|
|
}
|
|
|
|
charon->job_queue->add(charon->job_queue, job);
|
|
|
|
}
|
2007-02-28 14:04:36 +00:00
|
|
|
/* NLMSG_ERROR is sent back for acknowledge (or on error).
|
|
|
|
* XFRM_MSG_NEWSA is returned when we alloc spis and when
|
|
|
|
* updating SAs.
|
|
|
|
* XFRM_MSG_NEWPOLICY is returned when we query a policy.
|
|
|
|
*/
|
2007-03-02 17:08:38 +00:00
|
|
|
else if (hdr->nlmsg_type == NLMSG_ERROR ||
|
|
|
|
hdr->nlmsg_type == XFRM_MSG_NEWSA ||
|
|
|
|
hdr->nlmsg_type == XFRM_MSG_NEWPOLICY)
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
add_to_package_list(this, response);
|
|
|
|
}
|
|
|
|
/* we are not interested in anything other.
|
|
|
|
* anyway, move on to the next message
|
|
|
|
*/
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Receives packages from this->rt_socket and puts them to this->package_list
|
|
|
|
*/
|
|
|
|
static void receive_rt_messages(private_kernel_interface_t *this)
|
|
|
|
{
|
|
|
|
while(TRUE)
|
|
|
|
{
|
2007-03-02 17:08:38 +00:00
|
|
|
unsigned char response[BUFFER_SIZE*3];
|
2007-02-28 14:04:36 +00:00
|
|
|
struct nlmsghdr *hdr;
|
2007-03-02 17:08:38 +00:00
|
|
|
supersocket = this->rt_socket;
|
|
|
|
netlink_package_receiver(this->rt_socket,response, sizeof(response));
|
2007-02-28 14:04:36 +00:00
|
|
|
|
|
|
|
hdr = (struct nlmsghdr*)response;
|
|
|
|
/* NLMSG_ERROR is sent back for acknowledge (or on error).
|
|
|
|
* RTM_NEWROUTE is returned when we add a route.
|
|
|
|
*/
|
|
|
|
if (hdr->nlmsg_type == NLMSG_ERROR ||
|
2007-03-02 17:08:38 +00:00
|
|
|
hdr->nlmsg_type == RTM_NEWROUTE ||
|
|
|
|
hdr->nlmsg_type == RTM_NEWLINK ||
|
|
|
|
hdr->nlmsg_type == RTM_NEWADDR)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
|
|
|
add_to_package_list(this, response);
|
2006-07-12 11:42:36 +00:00
|
|
|
}
|
|
|
|
/* we are not interested in anything other.
|
2007-02-28 14:04:36 +00:00
|
|
|
* anyway, move on to the next message.
|
|
|
|
*/
|
2006-07-12 11:42:36 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
2005-12-05 16:09:42 +00:00
|
|
|
|
2006-07-18 12:53:54 +00:00
|
|
|
/**
|
|
|
|
* convert a host_t to a struct xfrm_address
|
|
|
|
*/
|
|
|
|
static void host2xfrm(host_t *host, xfrm_address_t *xfrm)
|
|
|
|
{
|
|
|
|
chunk_t chunk = host->get_address(host);
|
2007-01-03 09:25:57 +00:00
|
|
|
memcpy(xfrm, chunk.ptr, min(chunk.len, sizeof(xfrm_address_t)));
|
2006-07-18 12:53:54 +00:00
|
|
|
}
|
|
|
|
|
2006-03-02 09:56:30 +00:00
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.get_spi.
|
|
|
|
*/
|
2006-02-22 16:14:40 +00:00
|
|
|
static status_t get_spi(private_kernel_interface_t *this,
|
2006-07-18 12:53:54 +00:00
|
|
|
host_t *src, host_t *dst,
|
2006-02-22 16:14:40 +00:00
|
|
|
protocol_id_t protocol, u_int32_t reqid,
|
|
|
|
u_int32_t *spi)
|
2005-12-05 16:09:42 +00:00
|
|
|
{
|
2006-06-22 06:36:28 +00:00
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *response;
|
2006-07-12 11:42:36 +00:00
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct xfrm_userspi_info *userspi;
|
|
|
|
|
2006-06-22 06:36:28 +00:00
|
|
|
memset(&request, 0, sizeof(request));
|
2006-02-22 16:14:40 +00:00
|
|
|
status_t status = SUCCESS;
|
2005-12-05 16:09:42 +00:00
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "getting spi");
|
2006-04-12 08:36:40 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
hdr = (struct nlmsghdr*)request;
|
2006-06-22 06:36:28 +00:00
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST;
|
|
|
|
hdr->nlmsg_type = XFRM_MSG_ALLOCSPI;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userspi_info));
|
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
userspi = (struct xfrm_userspi_info*)NLMSG_DATA(hdr);
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(src, &userspi->info.saddr);
|
|
|
|
host2xfrm(dst, &userspi->info.id.daddr);
|
2006-06-22 06:36:28 +00:00
|
|
|
userspi->info.id.proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
|
|
|
|
userspi->info.mode = TRUE; /* tunnel mode */
|
|
|
|
userspi->info.reqid = reqid;
|
|
|
|
userspi->info.family = src->get_family(src);
|
|
|
|
userspi->min = 0xc0000000;
|
|
|
|
userspi->max = 0xcFFFFFFF;
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &response, this->xfrm_socket) != SUCCESS)
|
2006-02-16 09:55:07 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-04-12 08:36:40 +00:00
|
|
|
return FAILED;
|
2006-02-16 09:55:07 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (response->nlmsg_type == NLMSG_ERROR)
|
2006-02-16 09:55:07 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_ALLOCSPI got an error: %s",
|
2006-06-22 06:36:28 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error));
|
2006-02-22 16:14:40 +00:00
|
|
|
status = FAILED;
|
2006-02-16 09:55:07 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (response->nlmsg_type != XFRM_MSG_NEWSA)
|
2006-02-16 09:55:07 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_ALLOCSPI got a unknown reply");
|
2006-02-22 16:14:40 +00:00
|
|
|
status = FAILED;
|
2006-02-16 09:55:07 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (response->nlmsg_len < NLMSG_LENGTH(sizeof(struct xfrm_usersa_info)))
|
2006-02-16 09:55:07 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_ALLOCSPI got an invalid reply");
|
2006-02-22 16:14:40 +00:00
|
|
|
status = FAILED;
|
2006-02-16 09:55:07 +00:00
|
|
|
}
|
2006-04-12 08:36:40 +00:00
|
|
|
else
|
|
|
|
{
|
2006-06-22 06:36:28 +00:00
|
|
|
*spi = ((struct xfrm_usersa_info*)NLMSG_DATA(response))->id.spi;
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "SPI is 0x%x", *spi);
|
2006-04-12 08:36:40 +00:00
|
|
|
}
|
2006-04-10 08:07:38 +00:00
|
|
|
free(response);
|
2006-02-16 09:55:07 +00:00
|
|
|
|
2006-02-22 16:14:40 +00:00
|
|
|
return status;
|
2005-12-05 16:09:42 +00:00
|
|
|
}
|
2005-12-04 19:05:52 +00:00
|
|
|
|
2006-03-02 09:56:30 +00:00
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.add_sa.
|
|
|
|
*/
|
2006-06-22 06:36:28 +00:00
|
|
|
static status_t add_sa(private_kernel_interface_t *this,
|
2006-07-18 12:53:54 +00:00
|
|
|
host_t *src, host_t *dst, u_int32_t spi,
|
|
|
|
protocol_id_t protocol, u_int32_t reqid,
|
2006-06-22 06:36:28 +00:00
|
|
|
u_int64_t expire_soft, u_int64_t expire_hard,
|
|
|
|
algorithm_t *enc_alg, algorithm_t *int_alg,
|
2006-12-21 14:35:17 +00:00
|
|
|
prf_plus_t *prf_plus, natt_conf_t *natt, mode_t mode,
|
2006-06-22 06:36:28 +00:00
|
|
|
bool replace)
|
2005-12-05 16:09:42 +00:00
|
|
|
{
|
2006-06-22 06:36:28 +00:00
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *response;
|
2006-06-09 07:31:30 +00:00
|
|
|
char *alg_name;
|
2006-10-31 21:37:25 +00:00
|
|
|
u_int key_size;
|
2006-07-12 11:42:36 +00:00
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct xfrm_usersa_info *sa;
|
2006-06-09 07:31:30 +00:00
|
|
|
|
|
|
|
memset(&request, 0, sizeof(request));
|
2006-06-22 06:36:28 +00:00
|
|
|
status_t status = SUCCESS;
|
2006-04-12 08:36:40 +00:00
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "adding SA");
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
hdr = (struct nlmsghdr*)request;
|
2006-06-22 06:36:28 +00:00
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
|
|
|
|
hdr->nlmsg_type = replace ? XFRM_MSG_UPDSA : XFRM_MSG_NEWSA;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info));
|
2006-02-16 09:55:07 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
sa = (struct xfrm_usersa_info*)NLMSG_DATA(hdr);
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(src, &sa->saddr);
|
|
|
|
host2xfrm(dst, &sa->id.daddr);
|
2006-06-22 06:36:28 +00:00
|
|
|
sa->id.spi = spi;
|
|
|
|
sa->id.proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
|
2006-07-18 12:53:54 +00:00
|
|
|
sa->family = src->get_family(src);
|
2006-12-21 14:35:17 +00:00
|
|
|
sa->mode = mode;
|
2006-06-22 06:36:28 +00:00
|
|
|
sa->replay_window = 32;
|
|
|
|
sa->reqid = reqid;
|
2006-05-31 14:23:15 +00:00
|
|
|
/* we currently do not expire SAs by volume/packet count */
|
2006-06-22 06:36:28 +00:00
|
|
|
sa->lft.soft_byte_limit = XFRM_INF;
|
|
|
|
sa->lft.hard_byte_limit = XFRM_INF;
|
|
|
|
sa->lft.soft_packet_limit = XFRM_INF;
|
|
|
|
sa->lft.hard_packet_limit = XFRM_INF;
|
2006-05-31 14:23:15 +00:00
|
|
|
/* we use lifetimes since added, not since used */
|
2006-06-22 06:36:28 +00:00
|
|
|
sa->lft.soft_add_expires_seconds = expire_soft;
|
|
|
|
sa->lft.hard_add_expires_seconds = expire_hard;
|
|
|
|
sa->lft.soft_use_expires_seconds = 0;
|
|
|
|
sa->lft.hard_use_expires_seconds = 0;
|
2006-02-16 09:55:07 +00:00
|
|
|
|
2006-07-04 13:25:00 +00:00
|
|
|
struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_usersa_info);
|
|
|
|
|
2006-06-09 07:31:30 +00:00
|
|
|
if (enc_alg->algorithm != ENCR_UNDEFINED)
|
2006-02-16 09:55:07 +00:00
|
|
|
{
|
2006-06-22 06:36:28 +00:00
|
|
|
rthdr->rta_type = XFRMA_ALG_CRYPT;
|
2006-06-09 07:31:30 +00:00
|
|
|
alg_name = lookup_algorithm(encryption_algs, enc_alg, &key_size);
|
|
|
|
if (alg_name == NULL)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
|
2006-10-18 11:46:13 +00:00
|
|
|
encryption_algorithm_names, enc_alg->algorithm);
|
2006-06-09 07:31:30 +00:00
|
|
|
return FAILED;
|
|
|
|
}
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, " using encryption algorithm %N with key size %d",
|
2006-10-18 11:46:13 +00:00
|
|
|
encryption_algorithm_names, enc_alg->algorithm, key_size);
|
2006-06-22 06:36:28 +00:00
|
|
|
|
|
|
|
rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo) + key_size);
|
|
|
|
hdr->nlmsg_len += rthdr->rta_len;
|
|
|
|
if (hdr->nlmsg_len > sizeof(request))
|
2006-03-02 09:56:30 +00:00
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
|
|
|
|
struct xfrm_algo* algo = (struct xfrm_algo*)RTA_DATA(rthdr);
|
|
|
|
algo->alg_key_len = key_size;
|
|
|
|
strcpy(algo->alg_name, alg_name);
|
|
|
|
prf_plus->get_bytes(prf_plus, key_size / 8, algo->alg_key);
|
2006-07-04 13:25:00 +00:00
|
|
|
|
|
|
|
rthdr = XFRM_RTA_NEXT(rthdr);
|
2006-02-16 09:55:07 +00:00
|
|
|
}
|
|
|
|
|
2006-06-09 07:31:30 +00:00
|
|
|
if (int_alg->algorithm != AUTH_UNDEFINED)
|
2006-02-16 09:55:07 +00:00
|
|
|
{
|
2006-06-22 06:36:28 +00:00
|
|
|
rthdr->rta_type = XFRMA_ALG_AUTH;
|
2006-06-09 07:31:30 +00:00
|
|
|
alg_name = lookup_algorithm(integrity_algs, int_alg, &key_size);
|
|
|
|
if (alg_name == NULL)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "algorithm %N not supported by kernel!",
|
2006-10-18 11:46:13 +00:00
|
|
|
integrity_algorithm_names, int_alg->algorithm);
|
2006-06-09 07:31:30 +00:00
|
|
|
return FAILED;
|
|
|
|
}
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, " using integrity algorithm %N with key size %d",
|
2006-10-18 11:46:13 +00:00
|
|
|
integrity_algorithm_names, int_alg->algorithm, key_size);
|
2006-06-22 06:36:28 +00:00
|
|
|
|
|
|
|
rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_algo) + key_size);
|
|
|
|
hdr->nlmsg_len += rthdr->rta_len;
|
|
|
|
if (hdr->nlmsg_len > sizeof(request))
|
2006-03-02 09:56:30 +00:00
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
|
|
|
|
struct xfrm_algo* algo = (struct xfrm_algo*)RTA_DATA(rthdr);
|
|
|
|
algo->alg_key_len = key_size;
|
|
|
|
strcpy(algo->alg_name, alg_name);
|
|
|
|
prf_plus->get_bytes(prf_plus, key_size / 8, algo->alg_key);
|
2006-07-04 13:25:00 +00:00
|
|
|
|
|
|
|
rthdr = XFRM_RTA_NEXT(rthdr);
|
2006-02-16 09:55:07 +00:00
|
|
|
}
|
|
|
|
|
2006-06-22 06:36:28 +00:00
|
|
|
/* TODO: add IPComp here */
|
2006-02-16 09:55:07 +00:00
|
|
|
|
2006-06-22 06:36:28 +00:00
|
|
|
if (natt)
|
|
|
|
{
|
|
|
|
rthdr->rta_type = XFRMA_ENCAP;
|
|
|
|
rthdr->rta_len = RTA_LENGTH(sizeof(struct xfrm_encap_tmpl));
|
|
|
|
|
|
|
|
hdr->nlmsg_len += rthdr->rta_len;
|
|
|
|
if (hdr->nlmsg_len > sizeof(request))
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct xfrm_encap_tmpl* encap = (struct xfrm_encap_tmpl*)RTA_DATA(rthdr);
|
2006-07-10 14:24:04 +00:00
|
|
|
encap->encap_type = UDP_ENCAP_ESPINUDP;
|
2006-07-18 12:53:54 +00:00
|
|
|
encap->encap_sport = htons(natt->sport);
|
|
|
|
encap->encap_dport = htons(natt->dport);
|
2006-06-22 06:36:28 +00:00
|
|
|
memset(&encap->encap_oa, 0, sizeof (xfrm_address_t));
|
|
|
|
/* encap_oa could probably be derived from the
|
|
|
|
* traffic selectors [rfc4306, p39]. In the netlink kernel implementation
|
|
|
|
* pluto does the same as we do here but it uses encap_oa in the
|
|
|
|
* pfkey implementation. BUT as /usr/src/linux/net/key/af_key.c indicates
|
|
|
|
* the kernel ignores it anyway
|
|
|
|
* -> does that mean that NAT-T encap doesn't work in transport mode?
|
|
|
|
* No. The reason the kernel ignores NAT-OA is that it recomputes
|
|
|
|
* (or, rather, just ignores) the checksum. If packets pass
|
2007-02-28 14:04:36 +00:00
|
|
|
* the IPsec checks it marks them "checksum ok" so OA isn't needed. */
|
2006-07-04 13:25:00 +00:00
|
|
|
|
|
|
|
rthdr = XFRM_RTA_NEXT(rthdr);
|
2006-06-22 06:36:28 +00:00
|
|
|
}
|
2007-01-03 09:25:57 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &response, this->xfrm_socket) != SUCCESS)
|
2006-02-16 09:55:07 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-04-12 08:36:40 +00:00
|
|
|
return FAILED;
|
2006-02-22 16:14:40 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (response->nlmsg_type != NLMSG_ERROR)
|
2006-02-22 16:14:40 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_NEWSA not acknowledged");
|
2006-02-22 16:14:40 +00:00
|
|
|
status = FAILED;
|
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (((struct nlmsgerr*)NLMSG_DATA(response))->error)
|
2006-02-22 16:14:40 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_NEWSA got an error: %s",
|
2006-10-18 11:46:13 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error));
|
2006-02-22 16:14:40 +00:00
|
|
|
status = FAILED;
|
2006-02-16 09:55:07 +00:00
|
|
|
}
|
|
|
|
|
2006-04-10 08:07:38 +00:00
|
|
|
free(response);
|
2006-04-12 08:36:40 +00:00
|
|
|
return status;
|
2005-12-05 16:09:42 +00:00
|
|
|
}
|
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
/**
|
2006-07-18 12:53:54 +00:00
|
|
|
* Implementation of kernel_interface_t.update_sa.
|
2006-07-12 11:42:36 +00:00
|
|
|
*/
|
2006-07-18 12:53:54 +00:00
|
|
|
static status_t update_sa(
|
2006-06-22 06:36:28 +00:00
|
|
|
private_kernel_interface_t *this,
|
|
|
|
host_t *src, host_t *dst,
|
|
|
|
host_t *new_src, host_t *new_dst,
|
2006-07-18 12:53:54 +00:00
|
|
|
host_diff_t src_changes, host_diff_t dst_changes,
|
2006-06-22 06:36:28 +00:00
|
|
|
u_int32_t spi, protocol_id_t protocol)
|
2006-03-01 15:56:51 +00:00
|
|
|
{
|
2006-06-22 06:36:28 +00:00
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *update, *response;
|
2006-07-12 11:42:36 +00:00
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct xfrm_usersa_id *sa_id;
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2006-03-01 15:56:51 +00:00
|
|
|
memset(&request, 0, sizeof(request));
|
2006-04-12 08:36:40 +00:00
|
|
|
status_t status = SUCCESS;
|
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "getting SA");
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
hdr = (struct nlmsghdr*)request;
|
2006-07-10 14:24:04 +00:00
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST;
|
2006-06-22 06:36:28 +00:00
|
|
|
hdr->nlmsg_type = XFRM_MSG_GETSA;
|
2006-07-10 14:24:04 +00:00
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(dst, &sa_id->daddr);
|
2006-06-22 06:36:28 +00:00
|
|
|
sa_id->spi = spi;
|
|
|
|
sa_id->proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
|
|
|
|
sa_id->family = dst->get_family(dst);
|
2006-07-21 13:31:53 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &update, this->xfrm_socket) != SUCCESS)
|
2006-06-22 06:36:28 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-06-22 06:36:28 +00:00
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (update->nlmsg_type == NLMSG_ERROR)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETSA got an error: %s",
|
2006-10-18 11:46:13 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(update))->error));
|
2006-06-22 06:36:28 +00:00
|
|
|
free(update);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (update->nlmsg_type != XFRM_MSG_NEWSA)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETSA got a unknown reply");
|
2006-06-22 06:36:28 +00:00
|
|
|
free(update);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (update->nlmsg_len < NLMSG_LENGTH(sizeof(struct xfrm_usersa_info)))
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETSA got an invalid reply");
|
2006-06-22 06:36:28 +00:00
|
|
|
free(update);
|
|
|
|
return FAILED;
|
|
|
|
}
|
2006-03-01 15:56:51 +00:00
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "updating SA");
|
2006-06-22 06:36:28 +00:00
|
|
|
update->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
|
|
|
|
update->nlmsg_type = XFRM_MSG_UPDSA;
|
2006-03-01 15:56:51 +00:00
|
|
|
|
2006-06-22 06:36:28 +00:00
|
|
|
struct xfrm_usersa_info *sa = (struct xfrm_usersa_info*)NLMSG_DATA(update);
|
|
|
|
if (src_changes & HOST_DIFF_ADDR)
|
|
|
|
{
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(new_src, &sa->saddr);
|
2006-06-22 06:36:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (dst_changes & HOST_DIFF_ADDR)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "destination address changed! replacing SA");
|
2006-06-22 06:36:28 +00:00
|
|
|
|
|
|
|
update->nlmsg_type = XFRM_MSG_NEWSA;
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(new_dst, &sa->id.daddr);
|
2006-06-22 06:36:28 +00:00
|
|
|
}
|
2006-03-01 15:56:51 +00:00
|
|
|
|
2006-06-22 06:36:28 +00:00
|
|
|
if (src_changes & HOST_DIFF_PORT || dst_changes & HOST_DIFF_PORT)
|
|
|
|
{
|
|
|
|
struct rtattr *rthdr = XFRM_RTA(update, struct xfrm_usersa_info);
|
|
|
|
size_t rtsize = XFRM_PAYLOAD(update, struct xfrm_usersa_info);
|
|
|
|
while (RTA_OK(rthdr, rtsize))
|
|
|
|
{
|
|
|
|
if (rthdr->rta_type == XFRMA_ENCAP)
|
|
|
|
{
|
|
|
|
struct xfrm_encap_tmpl* encap = (struct xfrm_encap_tmpl*)RTA_DATA(rthdr);
|
|
|
|
encap->encap_sport = ntohs(new_src->get_port(new_src));
|
|
|
|
encap->encap_dport = ntohs(new_dst->get_port(new_dst));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
rthdr = RTA_NEXT(rthdr, rtsize);
|
|
|
|
}
|
|
|
|
}
|
2006-07-21 13:31:53 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, update, &response, this->xfrm_socket) != SUCCESS)
|
2006-06-22 06:36:28 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-06-22 06:36:28 +00:00
|
|
|
free(update);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (response->nlmsg_type != NLMSG_ERROR)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_XXXSA not acknowledged");
|
2006-06-22 06:36:28 +00:00
|
|
|
status = FAILED;
|
|
|
|
}
|
|
|
|
else if (((struct nlmsgerr*)NLMSG_DATA(response))->error)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_XXXSA got an error: %s",
|
2006-10-18 11:46:13 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error));
|
2006-06-22 06:36:28 +00:00
|
|
|
status = FAILED;
|
|
|
|
}
|
|
|
|
else if (dst_changes & HOST_DIFF_ADDR)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "deleting old SA");
|
2006-06-22 06:36:28 +00:00
|
|
|
status = this->public.del_sa(&this->public, dst, spi, protocol);
|
|
|
|
}
|
2006-07-21 13:31:53 +00:00
|
|
|
|
2006-06-22 06:36:28 +00:00
|
|
|
free(update);
|
|
|
|
free(response);
|
|
|
|
return status;
|
|
|
|
}
|
2006-07-12 11:42:36 +00:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.query_sa.
|
|
|
|
*/
|
|
|
|
static status_t query_sa(private_kernel_interface_t *this, host_t *dst,
|
2006-07-18 12:53:54 +00:00
|
|
|
u_int32_t spi, protocol_id_t protocol, u_int32_t *use_time)
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *response;
|
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct xfrm_usersa_id *sa_id;
|
|
|
|
struct xfrm_usersa_info *sa_info;
|
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "querying SA");
|
2006-07-12 11:42:36 +00:00
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
|
|
|
|
hdr = (struct nlmsghdr*)request;
|
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST;
|
|
|
|
hdr->nlmsg_type = XFRM_MSG_GETSA;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_info));
|
|
|
|
|
|
|
|
sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(dst, &sa_id->daddr);
|
2006-07-12 11:42:36 +00:00
|
|
|
sa_id->spi = spi;
|
|
|
|
sa_id->proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
|
|
|
|
sa_id->family = dst->get_family(dst);
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &response, this->xfrm_socket) != SUCCESS)
|
2006-07-12 11:42:36 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-07-12 11:42:36 +00:00
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (response->nlmsg_type != XFRM_MSG_NEWSA)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETSA not acknowledged");
|
2006-07-12 11:42:36 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (response->nlmsg_len < NLMSG_LENGTH(sizeof(struct xfrm_usersa_info)))
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETSA got an invalid reply");
|
2006-07-12 11:42:36 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
sa_info = (struct xfrm_usersa_info*)NLMSG_DATA(response);
|
2006-07-18 12:53:54 +00:00
|
|
|
*use_time = sa_info->curlft.use_time;
|
2006-03-01 15:56:51 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
free(response);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.del_sa.
|
|
|
|
*/
|
|
|
|
static status_t del_sa(private_kernel_interface_t *this, host_t *dst,
|
|
|
|
u_int32_t spi, protocol_id_t protocol)
|
2006-06-22 06:36:28 +00:00
|
|
|
{
|
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *response;
|
2006-07-12 11:42:36 +00:00
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct xfrm_usersa_id *sa_id;
|
2006-06-22 06:36:28 +00:00
|
|
|
|
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
status_t status = SUCCESS;
|
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "deleting SA");
|
2006-07-12 11:42:36 +00:00
|
|
|
|
|
|
|
hdr = (struct nlmsghdr*)request;
|
2006-06-22 06:36:28 +00:00
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
|
|
|
|
hdr->nlmsg_type = XFRM_MSG_DELSA;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_usersa_id));
|
2006-07-12 11:42:36 +00:00
|
|
|
|
|
|
|
sa_id = (struct xfrm_usersa_id*)NLMSG_DATA(hdr);
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(dst, &sa_id->daddr);
|
2006-06-22 06:36:28 +00:00
|
|
|
sa_id->spi = spi;
|
|
|
|
sa_id->proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
|
|
|
|
sa_id->family = dst->get_family(dst);
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &response, this->xfrm_socket) != SUCCESS)
|
2006-03-01 15:56:51 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-04-12 08:36:40 +00:00
|
|
|
return FAILED;
|
2006-03-01 15:56:51 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (response->nlmsg_type != NLMSG_ERROR)
|
2006-03-01 15:56:51 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_DELSA not acknowledged");
|
2006-03-01 15:56:51 +00:00
|
|
|
status = FAILED;
|
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (((struct nlmsgerr*)NLMSG_DATA(response))->error)
|
2006-03-01 15:56:51 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_DELSA got an error: %s",
|
2006-06-22 06:36:28 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error));
|
2006-03-01 15:56:51 +00:00
|
|
|
status = FAILED;
|
|
|
|
}
|
|
|
|
|
2006-04-10 08:07:38 +00:00
|
|
|
free(response);
|
2006-04-12 08:36:40 +00:00
|
|
|
return status;
|
2006-03-01 15:56:51 +00:00
|
|
|
}
|
|
|
|
|
2006-07-18 12:53:54 +00:00
|
|
|
/**
|
|
|
|
* convert a traffic selector address range to subnet and its mask.
|
|
|
|
*/
|
|
|
|
static void ts2subnet(traffic_selector_t* ts,
|
|
|
|
xfrm_address_t *net, u_int8_t *mask)
|
|
|
|
{
|
|
|
|
/* there is no way to do this cleanly, as the address range may
|
|
|
|
* be anything else but a subnet. We use from_addr as subnet
|
|
|
|
* and try to calculate a usable subnet mask.
|
2007-02-28 14:04:36 +00:00
|
|
|
*/
|
2006-08-30 17:12:56 +00:00
|
|
|
int byte, bit;
|
|
|
|
bool found = FALSE;
|
|
|
|
chunk_t from, to;
|
|
|
|
size_t size = (ts->get_type(ts) == TS_IPV4_ADDR_RANGE) ? 4 : 16;
|
2006-07-18 12:53:54 +00:00
|
|
|
|
2006-08-30 17:12:56 +00:00
|
|
|
from = ts->get_from_address(ts);
|
|
|
|
to = ts->get_to_address(ts);
|
2006-07-18 12:53:54 +00:00
|
|
|
|
2006-08-30 17:12:56 +00:00
|
|
|
*mask = (size * 8);
|
|
|
|
/* go trough all bits of the addresses, beginning in the front.
|
2007-02-28 14:04:36 +00:00
|
|
|
* as long as they are equal, the subnet gets larger
|
|
|
|
*/
|
2006-08-30 17:12:56 +00:00
|
|
|
for (byte = 0; byte < size; byte++)
|
2006-07-18 12:53:54 +00:00
|
|
|
{
|
2006-08-30 17:12:56 +00:00
|
|
|
for (bit = 7; bit >= 0; bit--)
|
2006-07-18 12:53:54 +00:00
|
|
|
{
|
2006-08-30 17:12:56 +00:00
|
|
|
if ((1<<bit & from.ptr[byte]) != (1<<bit & to.ptr[byte]))
|
2006-07-18 12:53:54 +00:00
|
|
|
{
|
2006-08-30 17:12:56 +00:00
|
|
|
*mask = ((7 - bit) + (byte * 8));
|
|
|
|
found = TRUE;
|
|
|
|
break;
|
2006-07-18 12:53:54 +00:00
|
|
|
}
|
|
|
|
}
|
2006-08-30 17:12:56 +00:00
|
|
|
if (found)
|
2006-07-18 12:53:54 +00:00
|
|
|
{
|
2006-08-30 17:12:56 +00:00
|
|
|
break;
|
2006-07-18 12:53:54 +00:00
|
|
|
}
|
|
|
|
}
|
2006-08-30 17:12:56 +00:00
|
|
|
memcpy(net, from.ptr, from.len);
|
|
|
|
chunk_free(&from);
|
|
|
|
chunk_free(&to);
|
2006-07-18 12:53:54 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* convert a traffic selector port range to port/portmask
|
|
|
|
*/
|
|
|
|
static void ts2ports(traffic_selector_t* ts,
|
|
|
|
u_int16_t *port, u_int16_t *mask)
|
|
|
|
{
|
|
|
|
/* linux does not seem to accept complex portmasks. Only
|
|
|
|
* any or a specific port is allowed. We set to any, if we have
|
|
|
|
* a port range, or to a specific, if we have one port only.
|
|
|
|
*/
|
|
|
|
u_int16_t from, to;
|
|
|
|
|
|
|
|
from = ts->get_from_port(ts);
|
|
|
|
to = ts->get_to_port(ts);
|
|
|
|
|
|
|
|
if (from == to)
|
|
|
|
{
|
|
|
|
*port = htons(from);
|
|
|
|
*mask = ~0;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
*port = 0;
|
|
|
|
*mask = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* convert a pair of traffic_selectors to a xfrm_selector
|
|
|
|
*/
|
|
|
|
static struct xfrm_selector ts2selector(traffic_selector_t *src,
|
|
|
|
traffic_selector_t *dst)
|
|
|
|
{
|
|
|
|
struct xfrm_selector sel;
|
|
|
|
|
|
|
|
memset(&sel, 0, sizeof(sel));
|
|
|
|
sel.family = src->get_type(src) == TS_IPV4_ADDR_RANGE ? AF_INET : AF_INET6;
|
|
|
|
/* src or dest proto may be "any" (0), use more restrictive one */
|
|
|
|
sel.proto = max(src->get_protocol(src), dst->get_protocol(dst));
|
|
|
|
ts2subnet(dst, &sel.daddr, &sel.prefixlen_d);
|
|
|
|
ts2subnet(src, &sel.saddr, &sel.prefixlen_s);
|
|
|
|
ts2ports(dst, &sel.dport, &sel.dport_mask);
|
|
|
|
ts2ports(src, &sel.sport, &sel.sport_mask);
|
|
|
|
sel.ifindex = 0;
|
|
|
|
sel.user = 0;
|
|
|
|
|
|
|
|
return sel;
|
|
|
|
}
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
/**
|
|
|
|
* Tries to find an ip address of a local interface that is included in the
|
|
|
|
* supplied traffic selector.
|
|
|
|
*/
|
|
|
|
static status_t find_addr_by_ts(traffic_selector_t *ts, host_t **ip)
|
|
|
|
{
|
2007-03-01 11:42:08 +00:00
|
|
|
host_t *try = NULL, *local;
|
|
|
|
int family;
|
|
|
|
|
|
|
|
/* if we have a family which includes localhost, we do not
|
|
|
|
* search for an IP, we use the default */
|
|
|
|
family = ts->get_type(ts) == TS_IPV4_ADDR_RANGE ? AF_INET : AF_INET6;
|
|
|
|
|
|
|
|
if (family == AF_INET)
|
|
|
|
{
|
|
|
|
local = host_create_from_string("127.0.0.1", 0);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
local = host_create_from_string("::1", 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (ts->includes(ts, local))
|
|
|
|
{
|
|
|
|
*ip = host_create_any(family);
|
|
|
|
local->destroy(local);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
local->destroy(local);
|
2007-02-28 14:04:36 +00:00
|
|
|
|
|
|
|
#ifdef HAVE_GETIFADDRS
|
|
|
|
struct ifaddrs *list;
|
|
|
|
struct ifaddrs *cur;
|
|
|
|
|
|
|
|
if (getifaddrs(&list) < 0)
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (cur = list; cur != NULL; cur = cur->ifa_next)
|
|
|
|
{
|
|
|
|
if (!(cur->ifa_flags & IFF_UP) || !cur->ifa_addr)
|
|
|
|
{
|
|
|
|
/* ignore interfaces which are down or have no address assigned */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
try = host_create_from_sockaddr(cur->ifa_addr);
|
|
|
|
|
|
|
|
if (try && ts->includes(ts, try))
|
|
|
|
{
|
|
|
|
if (ip)
|
|
|
|
{
|
|
|
|
*ip = try;
|
|
|
|
}
|
|
|
|
freeifaddrs(list);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
DESTROY_IF(try);
|
|
|
|
}
|
|
|
|
freeifaddrs(list);
|
|
|
|
return FAILED;
|
|
|
|
#else /* !HAVE_GETIFADDRS */
|
|
|
|
|
|
|
|
/* only IPv4 supported yet */
|
2007-03-01 12:35:21 +00:00
|
|
|
if (ts->get_type(ts) != TS_IPV4_ADDR_RANGE)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
int skt = socket(PF_INET, SOCK_DGRAM, 0);
|
|
|
|
struct ifconf conf;
|
|
|
|
struct ifreq reqs[16];
|
|
|
|
|
|
|
|
conf.ifc_len = sizeof(reqs);
|
|
|
|
conf.ifc_req = reqs;
|
|
|
|
|
|
|
|
if (ioctl(skt, SIOCGIFCONF, &conf) == -1)
|
|
|
|
{
|
|
|
|
DBG1(DBG_NET, "checking address using ioctl() failed: %m");
|
|
|
|
close(skt);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
close(skt);
|
|
|
|
|
|
|
|
while (conf.ifc_len >= sizeof(struct ifreq))
|
|
|
|
{
|
|
|
|
/* only IPv4 supported yet */
|
|
|
|
if (conf.ifc_req->ifr_addr.sa_family != AF_INET)
|
|
|
|
{
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2007-03-01 12:35:21 +00:00
|
|
|
try = host_create_from_sockaddr(&conf.ifc_req->ifr_addr);
|
2007-02-28 14:04:36 +00:00
|
|
|
|
|
|
|
if (try && ts->includes(ts, try))
|
|
|
|
{
|
|
|
|
if (ip)
|
|
|
|
{
|
|
|
|
*ip = try;
|
|
|
|
}
|
|
|
|
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
DESTROY_IF(try);
|
|
|
|
|
|
|
|
conf.ifc_len -= sizeof(struct ifreq);
|
|
|
|
conf.ifc_req++;
|
|
|
|
}
|
|
|
|
return FAILED;
|
|
|
|
#endif /* HAVE_GETIFADDRS */
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* forward declarations
|
|
|
|
*/
|
|
|
|
static status_t manage_srcroute(private_kernel_interface_t*,int,int,rt_refcount_t*);
|
|
|
|
static int get_iface(private_kernel_interface_t*,host_t*);
|
|
|
|
static void rt_refcount_destroy(rt_refcount_t*);
|
|
|
|
|
2006-03-02 09:56:30 +00:00
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.add_policy.
|
|
|
|
*/
|
2006-02-22 16:14:40 +00:00
|
|
|
static status_t add_policy(private_kernel_interface_t *this,
|
2006-07-18 12:53:54 +00:00
|
|
|
host_t *src, host_t *dst,
|
|
|
|
traffic_selector_t *src_ts,
|
|
|
|
traffic_selector_t *dst_ts,
|
|
|
|
policy_dir_t direction, protocol_id_t protocol,
|
2006-12-21 14:35:17 +00:00
|
|
|
u_int32_t reqid, bool high_prio, mode_t mode,
|
|
|
|
bool update)
|
2006-02-22 16:14:40 +00:00
|
|
|
{
|
2006-07-12 11:42:36 +00:00
|
|
|
iterator_t *iterator;
|
|
|
|
kernel_policy_t *current, *policy;
|
|
|
|
bool found = FALSE;
|
2006-06-22 06:36:28 +00:00
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *response;
|
2006-07-12 11:42:36 +00:00
|
|
|
struct xfrm_userpolicy_info *policy_info;
|
|
|
|
struct nlmsghdr *hdr;
|
2006-02-22 16:14:40 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
/* create a policy */
|
|
|
|
policy = malloc_thing(kernel_policy_t);
|
|
|
|
memset(policy, 0, sizeof(kernel_policy_t));
|
2006-07-18 12:53:54 +00:00
|
|
|
policy->sel = ts2selector(src_ts, dst_ts);
|
2006-07-12 11:42:36 +00:00
|
|
|
policy->direction = direction;
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
/* find the policy, which matches EXACTLY */
|
|
|
|
pthread_mutex_lock(&this->pol_mutex);
|
|
|
|
iterator = this->policies->create_iterator(this->policies, TRUE);
|
|
|
|
while (iterator->iterate(iterator, (void**)¤t))
|
|
|
|
{
|
2006-12-21 14:35:17 +00:00
|
|
|
if (memcmp(¤t->sel, &policy->sel, sizeof(struct xfrm_selector)) == 0 &&
|
2006-07-12 11:42:36 +00:00
|
|
|
policy->direction == current->direction)
|
|
|
|
{
|
2006-07-18 12:53:54 +00:00
|
|
|
free(policy);
|
2006-07-12 11:42:36 +00:00
|
|
|
/* use existing policy */
|
|
|
|
if (!update)
|
|
|
|
{
|
|
|
|
current->refcount++;
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "policy already exists, increasing refcount");
|
2006-09-08 13:10:52 +00:00
|
|
|
if (!high_prio)
|
|
|
|
{
|
|
|
|
/* if added policy is for a ROUTED child_sa, do not
|
|
|
|
* overwrite existing INSTALLED policy */
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
pthread_mutex_unlock(&this->pol_mutex);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
2006-07-12 11:42:36 +00:00
|
|
|
}
|
|
|
|
policy = current;
|
|
|
|
found = TRUE;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
if (!found)
|
|
|
|
{ /* apply the new one, if we have no such policy */
|
|
|
|
this->policies->insert_last(this->policies, policy);
|
|
|
|
policy->refcount = 1;
|
|
|
|
}
|
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "adding policy");
|
2006-07-12 11:42:36 +00:00
|
|
|
|
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
hdr = (struct nlmsghdr*)request;
|
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
|
|
|
|
hdr->nlmsg_type = XFRM_MSG_UPDPOLICY;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info));
|
|
|
|
|
|
|
|
policy_info = (struct xfrm_userpolicy_info*)NLMSG_DATA(hdr);
|
|
|
|
policy_info->sel = policy->sel;
|
2006-07-18 12:53:54 +00:00
|
|
|
policy_info->dir = policy->direction;
|
2006-09-08 13:10:52 +00:00
|
|
|
/* calculate priority based on source selector size, small size = high prio */
|
|
|
|
policy_info->priority = high_prio ? PRIO_HIGH : PRIO_LOW;
|
|
|
|
policy_info->priority -= policy->sel.prefixlen_s * 10;
|
|
|
|
policy_info->priority -= policy->sel.proto ? 2 : 0;
|
|
|
|
policy_info->priority -= policy->sel.sport_mask ? 1 : 0;
|
2006-07-12 11:42:36 +00:00
|
|
|
policy_info->action = XFRM_POLICY_ALLOW;
|
|
|
|
policy_info->share = XFRM_SHARE_ANY;
|
|
|
|
pthread_mutex_unlock(&this->pol_mutex);
|
|
|
|
|
|
|
|
/* policies don't expire */
|
|
|
|
policy_info->lft.soft_byte_limit = XFRM_INF;
|
|
|
|
policy_info->lft.soft_packet_limit = XFRM_INF;
|
|
|
|
policy_info->lft.hard_byte_limit = XFRM_INF;
|
|
|
|
policy_info->lft.hard_packet_limit = XFRM_INF;
|
|
|
|
policy_info->lft.soft_add_expires_seconds = 0;
|
|
|
|
policy_info->lft.hard_add_expires_seconds = 0;
|
|
|
|
policy_info->lft.soft_use_expires_seconds = 0;
|
|
|
|
policy_info->lft.hard_use_expires_seconds = 0;
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2006-07-04 13:25:00 +00:00
|
|
|
struct rtattr *rthdr = XFRM_RTA(hdr, struct xfrm_userpolicy_info);
|
2006-06-22 06:36:28 +00:00
|
|
|
rthdr->rta_type = XFRMA_TMPL;
|
|
|
|
|
|
|
|
rthdr->rta_len = sizeof(struct xfrm_user_tmpl);
|
|
|
|
rthdr->rta_len = RTA_LENGTH(rthdr->rta_len);
|
|
|
|
|
|
|
|
hdr->nlmsg_len += rthdr->rta_len;
|
|
|
|
if (hdr->nlmsg_len > sizeof(request))
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
struct xfrm_user_tmpl *tmpl = (struct xfrm_user_tmpl*)RTA_DATA(rthdr);
|
|
|
|
tmpl->reqid = reqid;
|
2006-07-21 13:31:53 +00:00
|
|
|
tmpl->id.proto = (protocol == PROTO_AH) ? KERNEL_AH : KERNEL_ESP;
|
2006-06-22 06:36:28 +00:00
|
|
|
tmpl->aalgos = tmpl->ealgos = tmpl->calgos = ~0;
|
2006-12-21 14:35:17 +00:00
|
|
|
tmpl->mode = mode;
|
2006-08-30 17:12:56 +00:00
|
|
|
tmpl->family = src->get_family(src);
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2006-07-18 12:53:54 +00:00
|
|
|
host2xfrm(src, &tmpl->saddr);
|
|
|
|
host2xfrm(dst, &tmpl->id.daddr);
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &response, this->xfrm_socket) != SUCCESS)
|
2006-02-22 16:14:40 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-04-12 08:36:40 +00:00
|
|
|
return FAILED;
|
2006-02-22 16:14:40 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (response->nlmsg_type != NLMSG_ERROR)
|
2006-02-22 16:14:40 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_UPDPOLICY not acknowledged");
|
2007-02-28 14:04:36 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
2006-02-22 16:14:40 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (((struct nlmsgerr*)NLMSG_DATA(response))->error)
|
2006-02-22 16:14:40 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_UPDPOLICY got an error: %s",
|
2006-10-18 11:46:13 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error));
|
2007-02-28 14:04:36 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
2006-02-22 16:14:40 +00:00
|
|
|
}
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
|
|
|
|
if (direction == POLICY_FWD)
|
|
|
|
{
|
|
|
|
policy->route = malloc_thing(rt_refcount_t);
|
|
|
|
if (find_addr_by_ts(dst_ts, &policy->route->src_ip) == SUCCESS)
|
|
|
|
{
|
2007-03-02 17:08:38 +00:00
|
|
|
policy->route->if_index = get_iface(this, dst);
|
2007-02-28 14:04:36 +00:00
|
|
|
policy->route->dst_net = chunk_alloc(policy->sel.family == AF_INET ? 4 : 16);
|
|
|
|
memcpy(policy->route->dst_net.ptr, &policy->sel.saddr, policy->route->dst_net.len);
|
|
|
|
policy->route->prefixlen = policy->sel.prefixlen_s;
|
|
|
|
|
|
|
|
if (manage_srcroute(this, RTM_NEWROUTE, NLM_F_CREATE | NLM_F_EXCL,
|
|
|
|
policy->route) != SUCCESS)
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "error installing route");
|
|
|
|
rt_refcount_destroy(policy->route);
|
|
|
|
policy->route = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
free(policy->route);
|
|
|
|
policy->route = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-04-10 08:07:38 +00:00
|
|
|
free(response);
|
2007-02-28 14:04:36 +00:00
|
|
|
return SUCCESS;
|
2006-02-22 16:14:40 +00:00
|
|
|
}
|
|
|
|
|
2006-07-18 12:53:54 +00:00
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.query_policy.
|
|
|
|
*/
|
|
|
|
static status_t query_policy(private_kernel_interface_t *this,
|
|
|
|
traffic_selector_t *src_ts,
|
|
|
|
traffic_selector_t *dst_ts,
|
|
|
|
policy_dir_t direction, u_int32_t *use_time)
|
|
|
|
{
|
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *response;
|
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct xfrm_userpolicy_id *policy_id;
|
|
|
|
struct xfrm_userpolicy_info *policy;
|
|
|
|
|
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
status_t status = SUCCESS;
|
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "querying policy");
|
2006-07-18 12:53:54 +00:00
|
|
|
|
|
|
|
hdr = (struct nlmsghdr*)request;
|
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST;
|
|
|
|
hdr->nlmsg_type = XFRM_MSG_GETPOLICY;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
|
|
|
|
|
|
|
|
policy_id = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
|
|
|
|
policy_id->sel = ts2selector(src_ts, dst_ts);
|
|
|
|
policy_id->dir = direction;
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &response, this->xfrm_socket) != SUCCESS)
|
2006-07-18 12:53:54 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-07-18 12:53:54 +00:00
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (response->nlmsg_type == NLMSG_ERROR)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETPOLICY got an error: %s",
|
2006-10-18 11:46:13 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error));
|
2006-07-18 12:53:54 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (response->nlmsg_type != XFRM_MSG_NEWPOLICY)
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETPOLICY got an unknown reply");
|
2006-07-18 12:53:54 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (response->nlmsg_len < NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_info)))
|
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_GETPOLICY got an invalid reply");
|
2006-07-18 12:53:54 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
policy = (struct xfrm_userpolicy_info*)NLMSG_DATA(response);
|
|
|
|
|
|
|
|
*use_time = (time_t)policy->curlft.use_time;
|
|
|
|
|
|
|
|
free(response);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.del_policy.
|
|
|
|
*/
|
|
|
|
static status_t del_policy(private_kernel_interface_t *this,
|
2006-07-18 12:53:54 +00:00
|
|
|
traffic_selector_t *src_ts,
|
|
|
|
traffic_selector_t *dst_ts,
|
|
|
|
policy_dir_t direction)
|
2006-06-23 14:02:30 +00:00
|
|
|
{
|
2006-07-12 11:42:36 +00:00
|
|
|
kernel_policy_t *current, policy, *to_delete = NULL;
|
2007-02-28 14:04:36 +00:00
|
|
|
rt_refcount_t *route;
|
2006-06-23 14:02:30 +00:00
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *response;
|
2006-07-12 11:42:36 +00:00
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct xfrm_userpolicy_id *policy_id;
|
|
|
|
iterator_t *iterator;
|
2006-06-23 14:02:30 +00:00
|
|
|
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "deleting policy");
|
2006-06-23 14:02:30 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
/* create a policy */
|
|
|
|
memset(&policy, 0, sizeof(kernel_policy_t));
|
2006-07-18 12:53:54 +00:00
|
|
|
policy.sel = ts2selector(src_ts, dst_ts);
|
2006-07-12 11:42:36 +00:00
|
|
|
policy.direction = direction;
|
|
|
|
|
|
|
|
/* find the policy */
|
|
|
|
pthread_mutex_lock(&this->pol_mutex);
|
|
|
|
iterator = this->policies->create_iterator(this->policies, TRUE);
|
|
|
|
while (iterator->iterate(iterator, (void**)¤t))
|
2006-06-23 14:02:30 +00:00
|
|
|
{
|
2006-07-12 11:42:36 +00:00
|
|
|
if (memcmp(¤t->sel, &policy.sel, sizeof(struct xfrm_selector)) == 0 &&
|
|
|
|
policy.direction == current->direction)
|
|
|
|
{
|
|
|
|
to_delete = current;
|
|
|
|
if (--to_delete->refcount > 0)
|
|
|
|
{
|
|
|
|
/* is used by more SAs, keep in kernel */
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG2(DBG_KNL, "is used by other SAs, not removed");
|
2006-07-12 11:42:36 +00:00
|
|
|
iterator->destroy(iterator);
|
|
|
|
pthread_mutex_unlock(&this->pol_mutex);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
/* remove if last reference */
|
|
|
|
iterator->remove(iterator);
|
|
|
|
break;
|
|
|
|
}
|
2006-06-23 14:02:30 +00:00
|
|
|
}
|
2006-07-12 11:42:36 +00:00
|
|
|
iterator->destroy(iterator);
|
|
|
|
pthread_mutex_unlock(&this->pol_mutex);
|
|
|
|
if (!to_delete)
|
2006-06-23 14:02:30 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "no such policy found");
|
2006-07-12 11:42:36 +00:00
|
|
|
return NOT_FOUND;
|
2006-06-23 14:02:30 +00:00
|
|
|
}
|
2006-04-12 08:36:40 +00:00
|
|
|
|
2006-03-01 15:56:51 +00:00
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
hdr = (struct nlmsghdr*)request;
|
2006-06-22 06:36:28 +00:00
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
|
|
|
|
hdr->nlmsg_type = XFRM_MSG_DELPOLICY;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct xfrm_userpolicy_id));
|
2006-03-01 15:56:51 +00:00
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
policy_id = (struct xfrm_userpolicy_id*)NLMSG_DATA(hdr);
|
|
|
|
policy_id->sel = to_delete->sel;
|
|
|
|
policy_id->dir = direction;
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
route = to_delete->route;
|
2006-07-12 11:42:36 +00:00
|
|
|
free(to_delete);
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (send_message(this, hdr, &response, this->xfrm_socket) != SUCCESS)
|
2006-03-01 15:56:51 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
2006-04-12 08:36:40 +00:00
|
|
|
return FAILED;
|
2006-03-01 15:56:51 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (response->nlmsg_type != NLMSG_ERROR)
|
2006-03-01 15:56:51 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_DELPOLICY not acknowledged");
|
2007-02-28 14:04:36 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
2006-03-01 15:56:51 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
else if (((struct nlmsgerr*)NLMSG_DATA(response))->error)
|
2006-03-01 15:56:51 +00:00
|
|
|
{
|
2006-10-26 09:46:56 +00:00
|
|
|
DBG1(DBG_KNL, "netlink request XFRM_MSG_DELPOLICY got an error: %s",
|
2006-10-18 11:46:13 +00:00
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error));
|
2007-02-28 14:04:36 +00:00
|
|
|
free(response);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (route)
|
|
|
|
{
|
|
|
|
if (manage_srcroute(this, RTM_DELROUTE, 0, route) != SUCCESS)
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "error uninstalling route");
|
|
|
|
}
|
|
|
|
rt_refcount_destroy(route);
|
2006-03-01 15:56:51 +00:00
|
|
|
}
|
|
|
|
|
2006-04-10 08:07:38 +00:00
|
|
|
free(response);
|
2007-02-28 14:04:36 +00:00
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Sends an RT_NETLINK request to the kernel.
|
|
|
|
*/
|
|
|
|
static status_t send_rtrequest(private_kernel_interface_t *this, struct nlmsghdr *hdr)
|
|
|
|
{
|
|
|
|
struct nlmsghdr *response;
|
|
|
|
|
|
|
|
if (send_message(this, hdr, &response, this->rt_socket) != SUCCESS)
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "netlink communication failed");
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
else if (((struct nlmsgerr*)NLMSG_DATA(response))->error)
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "netlink request got an error: %s (%d)",
|
|
|
|
strerror(-((struct nlmsgerr*)NLMSG_DATA(response))->error),
|
|
|
|
-((struct nlmsgerr*)NLMSG_DATA(response))->error);
|
|
|
|
free(response);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
free(response);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Creates an rtattr and adds it to the netlink message.
|
|
|
|
*/
|
|
|
|
static status_t add_rtattr(struct nlmsghdr *hdr, int max_len,
|
|
|
|
int rta_type, void *data, int data_len)
|
|
|
|
{
|
|
|
|
struct rtattr *rta;
|
|
|
|
|
|
|
|
if (NLMSG_ALIGN(hdr->nlmsg_len) + RTA_ALIGN(data_len) > max_len)
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "netlink message exceeded bound of %d", max_len);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
rta = (struct rtattr*)(((char*)hdr) + NLMSG_ALIGN(hdr->nlmsg_len));
|
|
|
|
|
|
|
|
rta->rta_type = rta_type;
|
|
|
|
rta->rta_len = RTA_LENGTH(data_len);
|
|
|
|
memcpy(RTA_DATA(rta), data, data_len);
|
|
|
|
|
|
|
|
hdr->nlmsg_len = NLMSG_ALIGN(hdr->nlmsg_len) + rta->rta_len;
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Manages the creation and deletion of ip addresses on an interface.
|
|
|
|
* By setting the appropriate nlmsg_type, the ip will be set or unset.
|
|
|
|
*/
|
|
|
|
static status_t manage_ipaddr(private_kernel_interface_t *this, int nlmsg_type,
|
|
|
|
int flags, int if_index, host_t *ip)
|
|
|
|
{
|
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct ifaddrmsg *msg;
|
|
|
|
chunk_t chunk;
|
|
|
|
|
|
|
|
DBG2(DBG_KNL, "adding virtual IP %H to interface %d", ip, if_index);
|
|
|
|
|
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
|
|
|
|
chunk = ip->get_address(ip);
|
|
|
|
|
|
|
|
hdr = (struct nlmsghdr*)request;
|
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
|
|
|
|
hdr->nlmsg_type = nlmsg_type;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
|
|
|
|
|
|
|
|
msg = (struct ifaddrmsg*)NLMSG_DATA(hdr);
|
|
|
|
msg->ifa_family = ip->get_family(ip);
|
|
|
|
msg->ifa_flags = 0;
|
|
|
|
msg->ifa_prefixlen = 8 * chunk.len;
|
|
|
|
msg->ifa_scope = RT_SCOPE_UNIVERSE;
|
|
|
|
msg->ifa_index = if_index;
|
|
|
|
|
|
|
|
if (add_rtattr(hdr, sizeof(request), IFA_LOCAL,
|
|
|
|
chunk.ptr, chunk.len) != SUCCESS)
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
return send_rtrequest(this, hdr);
|
|
|
|
}
|
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
/**
|
|
|
|
* send a netlink message and wait for a reply
|
|
|
|
*/
|
|
|
|
static status_t netlink_send(int socket, struct nlmsghdr *in,
|
|
|
|
struct nlmsghdr **out, size_t *out_len)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
2007-03-02 17:08:38 +00:00
|
|
|
int len, addr_len;
|
|
|
|
struct sockaddr_nl addr;
|
|
|
|
chunk_t result = chunk_empty, tmp;
|
|
|
|
struct nlmsghdr *msg, peek;
|
2007-02-28 14:04:36 +00:00
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
static int seq = 200;
|
|
|
|
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
|
2007-02-28 14:04:36 +00:00
|
|
|
|
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
pthread_mutex_lock(&mutex);
|
|
|
|
|
|
|
|
in->nlmsg_seq = ++seq;
|
|
|
|
in->nlmsg_pid = getpid();
|
|
|
|
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
|
|
addr.nl_family = AF_NETLINK;
|
|
|
|
addr.nl_pid = 0;
|
|
|
|
addr.nl_groups = 0;
|
2007-02-28 14:04:36 +00:00
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
while (TRUE)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
2007-03-02 17:08:38 +00:00
|
|
|
len = sendto(socket, in, in->nlmsg_len, 0,
|
|
|
|
(struct sockaddr*)&addr, sizeof(addr));
|
|
|
|
|
|
|
|
if (len != in->nlmsg_len)
|
|
|
|
{
|
|
|
|
if (errno == EINTR)
|
|
|
|
{
|
|
|
|
/* interrupted, try again */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
pthread_mutex_unlock(&mutex);
|
|
|
|
DBG1(DBG_KNL, "error sending to netlink socket: %m");
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
break;
|
2007-02-28 14:04:36 +00:00
|
|
|
}
|
2007-03-02 17:08:38 +00:00
|
|
|
|
|
|
|
for(;;)
|
|
|
|
{
|
|
|
|
tmp = chunk_alloca(2048);
|
|
|
|
msg = (struct nlmsghdr*)tmp.ptr;
|
|
|
|
|
|
|
|
len = recvfrom(socket, tmp.ptr, tmp.len, 0,
|
|
|
|
(struct sockaddr*)&addr, &addr_len);
|
|
|
|
if (len < 0)
|
|
|
|
{
|
|
|
|
if (errno == EINTR)
|
|
|
|
{
|
|
|
|
/* interrupted, try again */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
DBG1(DBG_IKE, "error reading from netlink socket: %m");
|
|
|
|
pthread_mutex_unlock(&mutex);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
if (!NLMSG_OK(msg, len))
|
|
|
|
{
|
|
|
|
DBG1(DBG_IKE, "received corrupted netlink message");
|
|
|
|
pthread_mutex_unlock(&mutex);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
if (msg->nlmsg_seq != seq)
|
|
|
|
{
|
|
|
|
DBG1(DBG_IKE, "received invalid netlink sequence number");
|
|
|
|
if (msg->nlmsg_seq < seq)
|
|
|
|
{
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
pthread_mutex_unlock(&mutex);
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
tmp.len = len;
|
|
|
|
result = chunk_cata("cc", result, tmp);
|
|
|
|
|
|
|
|
/* NLM_F_MULTI flag does not seem to be set correctly, we use sequence
|
|
|
|
* numbers to detect multi header messages */
|
|
|
|
len = recvfrom(socket, &peek, sizeof(peek), MSG_PEEK | MSG_DONTWAIT,
|
|
|
|
(struct sockaddr*)&addr, &addr_len);
|
|
|
|
|
|
|
|
if (len == sizeof(peek) && peek.nlmsg_seq == seq)
|
|
|
|
{
|
|
|
|
/* seems to be multipart */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
break;
|
2007-02-28 14:04:36 +00:00
|
|
|
}
|
2007-03-02 17:08:38 +00:00
|
|
|
|
|
|
|
*out_len = result.len;
|
|
|
|
*out = (struct nlmsghdr*)clalloc(result.ptr, result.len);
|
|
|
|
|
|
|
|
pthread_mutex_unlock(&mutex);
|
|
|
|
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int get_iface(private_kernel_interface_t *this, host_t* ip)
|
|
|
|
{
|
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
struct nlmsghdr *hdr, *tofree;
|
|
|
|
struct rtgenmsg *msg;
|
|
|
|
int ifindex = 0;
|
|
|
|
size_t len;
|
|
|
|
chunk_t target, current;
|
|
|
|
|
|
|
|
memset(&request, 0, sizeof(request));
|
2007-02-28 14:04:36 +00:00
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
hdr = (struct nlmsghdr*)request;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
|
|
|
|
hdr->nlmsg_type = RTM_GETADDR;
|
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_MATCH | NLM_F_ROOT;
|
|
|
|
|
|
|
|
msg = (struct rtgenmsg*)NLMSG_DATA(hdr);
|
|
|
|
msg->rtgen_family = AF_UNSPEC;
|
|
|
|
|
|
|
|
target = ip->get_address(ip);
|
|
|
|
|
|
|
|
if (netlink_send(this->rt_socket, hdr, &hdr, &len) == SUCCESS)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
2007-03-02 17:08:38 +00:00
|
|
|
tofree = hdr;
|
|
|
|
while (NLMSG_OK(hdr, len))
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
2007-03-02 17:08:38 +00:00
|
|
|
switch (hdr->nlmsg_type)
|
|
|
|
{
|
|
|
|
case RTM_NEWADDR:
|
|
|
|
{
|
|
|
|
struct ifaddrmsg* msg = (struct ifaddrmsg*)(NLMSG_DATA(hdr));
|
|
|
|
struct rtattr *rta = IFA_RTA(msg);
|
|
|
|
size_t rtasize = IFA_PAYLOAD (hdr);
|
|
|
|
|
|
|
|
while(RTA_OK(rta, rtasize))
|
|
|
|
{
|
|
|
|
if (rta->rta_type == IFA_ADDRESS)
|
|
|
|
{
|
|
|
|
current.len = rta->rta_len - 4;
|
|
|
|
current.ptr = RTA_DATA(rta);
|
|
|
|
if (chunk_equals(current, target))
|
|
|
|
{
|
|
|
|
ifindex = msg->ifa_index;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
rta = RTA_NEXT(rta, rtasize);
|
|
|
|
}
|
|
|
|
hdr = NLMSG_NEXT(hdr, len);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
hdr = NLMSG_NEXT(hdr, len);
|
|
|
|
continue;
|
|
|
|
case NLMSG_DONE:
|
|
|
|
break;
|
|
|
|
}
|
2007-02-28 14:04:36 +00:00
|
|
|
break;
|
|
|
|
}
|
2007-03-02 17:08:38 +00:00
|
|
|
free(tofree);
|
2007-02-28 14:04:36 +00:00
|
|
|
}
|
2007-03-02 17:08:38 +00:00
|
|
|
else
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
2007-03-02 17:08:38 +00:00
|
|
|
DBG1(DBG_IKE, "unable to get interface address for %H", ip);
|
2007-02-28 14:04:36 +00:00
|
|
|
}
|
|
|
|
return ifindex;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Manages source routes in the routing table.
|
|
|
|
* By setting the appropriate nlmsg_type, the route will be set or unset.
|
|
|
|
*/
|
|
|
|
static status_t manage_srcroute(private_kernel_interface_t *this,
|
|
|
|
int nlmsg_type, int flags, rt_refcount_t *route)
|
|
|
|
{
|
|
|
|
struct nlmsghdr *hdr;
|
|
|
|
struct rtmsg *msg;
|
|
|
|
unsigned char request[BUFFER_SIZE];
|
|
|
|
chunk_t src;
|
|
|
|
|
2007-03-01 11:42:08 +00:00
|
|
|
/* if route is 0.0.0.0/0, we can't install it, as it would
|
|
|
|
* overwrite the default route. Instead, we add two routes:
|
|
|
|
* 0.0.0.0/1 and 128.0.0.0/1 */
|
|
|
|
if (route->prefixlen == 0)
|
|
|
|
{
|
|
|
|
rt_refcount_t half;
|
|
|
|
status_t status;
|
|
|
|
|
|
|
|
half.dst_net = chunk_alloca(route->dst_net.len);
|
|
|
|
memset(half.dst_net.ptr, 0, half.dst_net.len);
|
|
|
|
half.src_ip = route->src_ip;
|
|
|
|
half.if_index = route->if_index;
|
|
|
|
half.prefixlen = 1;
|
|
|
|
|
|
|
|
status = manage_srcroute(this, nlmsg_type, flags, &half);
|
|
|
|
half.dst_net.ptr[0] |= 0x80;
|
|
|
|
status = manage_srcroute(this, nlmsg_type, flags, &half);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
|
|
|
|
hdr = (struct nlmsghdr*)request;
|
|
|
|
hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags;
|
|
|
|
hdr->nlmsg_type = nlmsg_type;
|
|
|
|
hdr->nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
|
|
|
|
|
|
|
|
msg = (struct rtmsg*)NLMSG_DATA(hdr);
|
|
|
|
msg->rtm_family = route->src_ip->get_family(route->src_ip);
|
|
|
|
msg->rtm_dst_len = route->prefixlen;
|
|
|
|
msg->rtm_table = RT_TABLE_MAIN;
|
|
|
|
msg->rtm_protocol = RTPROT_STATIC;
|
|
|
|
msg->rtm_type = RTN_UNICAST;
|
|
|
|
msg->rtm_scope = RT_SCOPE_UNIVERSE;
|
|
|
|
|
|
|
|
if (add_rtattr(hdr, sizeof(request), RTA_DST,
|
|
|
|
route->dst_net.ptr, route->dst_net.len) != SUCCESS)
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
2007-03-01 11:42:08 +00:00
|
|
|
src = route->src_ip->get_address(route->src_ip);
|
2007-02-28 14:04:36 +00:00
|
|
|
if (add_rtattr(hdr, sizeof(request), RTA_PREFSRC,
|
|
|
|
src.ptr, src.len) != SUCCESS)
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (add_rtattr(hdr, sizeof(request), RTA_OIF,
|
|
|
|
&route->if_index, sizeof(route->if_index)) != SUCCESS)
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
return send_rtrequest(this, hdr);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* destroy an rt_refcount object
|
|
|
|
*/
|
|
|
|
static void rt_refcount_destroy(rt_refcount_t *this)
|
|
|
|
{
|
|
|
|
this->src_ip->destroy(this->src_ip);
|
|
|
|
chunk_free(&this->dst_net);
|
|
|
|
free(this);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* destroy a vip_refcount object
|
|
|
|
*/
|
|
|
|
static void vip_refcount_destroy(vip_refcount_t *this)
|
|
|
|
{
|
|
|
|
this->ip->destroy(this->ip);
|
|
|
|
free(this);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.add_ip.
|
|
|
|
*/
|
|
|
|
static status_t add_ip(private_kernel_interface_t *this,
|
2007-03-02 17:08:38 +00:00
|
|
|
host_t *virtual_ip, host_t *iface_ip)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
|
|
|
int targetif;
|
|
|
|
vip_refcount_t *listed;
|
|
|
|
iterator_t *iterator;
|
|
|
|
|
|
|
|
DBG2(DBG_KNL, "adding ip addr: %H", virtual_ip);
|
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
targetif = get_iface(this, iface_ip);
|
2007-02-28 14:04:36 +00:00
|
|
|
if (targetif == 0)
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* beware of deadlocks (e.g. send/receive packets while holding the lock) */
|
|
|
|
iterator = this->vips->create_iterator_locked(this->vips, &(this->vip_mutex));
|
|
|
|
while (iterator->iterate(iterator, (void**)&listed))
|
|
|
|
{
|
|
|
|
if (listed->if_index == targetif &&
|
|
|
|
virtual_ip->ip_equals(virtual_ip, listed->ip))
|
|
|
|
{
|
|
|
|
listed->refcount++;
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
|
|
|
|
if (manage_ipaddr(this, RTM_NEWADDR, NLM_F_CREATE | NLM_F_EXCL,
|
|
|
|
targetif, virtual_ip) == SUCCESS)
|
|
|
|
{
|
|
|
|
listed = malloc_thing(vip_refcount_t);
|
|
|
|
listed->ip = virtual_ip->clone(virtual_ip);
|
|
|
|
listed->if_index = targetif;
|
|
|
|
listed->refcount = 1;
|
|
|
|
this->vips->insert_last(this->vips, listed);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Implementation of kernel_interface_t.del_ip.
|
|
|
|
*/
|
|
|
|
static status_t del_ip(private_kernel_interface_t *this,
|
2007-03-02 17:08:38 +00:00
|
|
|
host_t *virtual_ip, host_t *iface_ip)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
|
|
|
int targetif;
|
|
|
|
vip_refcount_t *listed;
|
|
|
|
iterator_t *iterator;
|
|
|
|
|
|
|
|
DBG2(DBG_KNL, "deleting ip addr: %H", virtual_ip);
|
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
targetif = get_iface(this, iface_ip);
|
2007-02-28 14:04:36 +00:00
|
|
|
if (targetif == 0)
|
|
|
|
{
|
|
|
|
return FAILED;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* beware of deadlocks (e.g. send/receive packets while holding the lock) */
|
|
|
|
iterator = this->vips->create_iterator_locked(this->vips, &(this->vip_mutex));
|
|
|
|
while (iterator->iterate(iterator, (void**)&listed))
|
|
|
|
{
|
|
|
|
if (listed->if_index == targetif &&
|
|
|
|
virtual_ip->ip_equals(virtual_ip, listed->ip))
|
|
|
|
{
|
|
|
|
listed->refcount--;
|
|
|
|
if (listed->refcount == 0)
|
|
|
|
{
|
|
|
|
iterator->remove(iterator);
|
|
|
|
vip_refcount_destroy(listed);
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
return manage_ipaddr(this, RTM_DELADDR, 0, targetif, virtual_ip);
|
|
|
|
}
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
return SUCCESS;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
iterator->destroy(iterator);
|
|
|
|
|
|
|
|
return FAILED;
|
2006-03-01 15:56:51 +00:00
|
|
|
}
|
|
|
|
|
2005-12-05 16:09:42 +00:00
|
|
|
/**
|
2005-12-06 16:36:42 +00:00
|
|
|
* Implementation of kernel_interface_t.destroy.
|
2005-12-04 19:05:52 +00:00
|
|
|
*/
|
2005-12-05 16:09:42 +00:00
|
|
|
static void destroy(private_kernel_interface_t *this)
|
2007-02-28 14:04:36 +00:00
|
|
|
{
|
|
|
|
pthread_cancel(this->xfrm_thread);
|
|
|
|
pthread_join(this->xfrm_thread, NULL);
|
|
|
|
pthread_cancel(this->rt_thread);
|
|
|
|
pthread_join(this->rt_thread, NULL);
|
|
|
|
close(this->xfrm_socket);
|
|
|
|
close(this->rt_socket);
|
|
|
|
this->vips->destroy_function(this->vips, (void*)vip_refcount_destroy);
|
2005-12-05 16:09:42 +00:00
|
|
|
this->responses->destroy(this->responses);
|
2006-07-12 11:42:36 +00:00
|
|
|
this->policies->destroy(this->policies);
|
2006-04-10 08:07:38 +00:00
|
|
|
free(this);
|
2005-12-04 19:05:52 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2005-12-06 16:36:42 +00:00
|
|
|
* Described in header.
|
2005-12-04 19:05:52 +00:00
|
|
|
*/
|
|
|
|
kernel_interface_t *kernel_interface_create()
|
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
struct sockaddr_nl addr_xfrm;
|
|
|
|
struct sockaddr_nl addr_rt;
|
2006-04-10 08:07:38 +00:00
|
|
|
private_kernel_interface_t *this = malloc_thing(private_kernel_interface_t);
|
2005-12-04 19:05:52 +00:00
|
|
|
|
|
|
|
/* public functions */
|
2006-02-22 16:14:40 +00:00
|
|
|
this->public.get_spi = (status_t(*)(kernel_interface_t*,host_t*,host_t*,protocol_id_t,u_int32_t,u_int32_t*))get_spi;
|
2006-12-21 14:35:17 +00:00
|
|
|
this->public.add_sa = (status_t(*)(kernel_interface_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,u_int64_t,u_int64_t,algorithm_t*,algorithm_t*,prf_plus_t*,natt_conf_t*,mode_t,bool))add_sa;
|
2006-07-18 12:53:54 +00:00
|
|
|
this->public.update_sa = (status_t(*)(kernel_interface_t*,host_t*,u_int32_t,protocol_id_t,host_t*,host_t*,host_diff_t,host_diff_t))update_sa;
|
|
|
|
this->public.query_sa = (status_t(*)(kernel_interface_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t*))query_sa;
|
2006-03-02 09:56:30 +00:00
|
|
|
this->public.del_sa = (status_t(*)(kernel_interface_t*,host_t*,u_int32_t,protocol_id_t))del_sa;
|
2006-12-21 14:35:17 +00:00
|
|
|
this->public.add_policy = (status_t(*)(kernel_interface_t*,host_t*,host_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,protocol_id_t,u_int32_t,bool,mode_t,bool))add_policy;
|
2006-07-18 12:53:54 +00:00
|
|
|
this->public.query_policy = (status_t(*)(kernel_interface_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t*))query_policy;
|
|
|
|
this->public.del_policy = (status_t(*)(kernel_interface_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t))del_policy;
|
2007-02-28 14:04:36 +00:00
|
|
|
this->public.add_ip = (status_t(*)(kernel_interface_t*,host_t*,host_t*)) add_ip;
|
|
|
|
this->public.del_ip = (status_t(*)(kernel_interface_t*,host_t*,host_t*)) del_ip;
|
2005-12-04 19:05:52 +00:00
|
|
|
this->public.destroy = (void(*)(kernel_interface_t*)) destroy;
|
|
|
|
|
|
|
|
/* private members */
|
2005-12-05 16:09:42 +00:00
|
|
|
this->pid = getpid();
|
|
|
|
this->responses = linked_list_create();
|
2007-02-28 14:04:36 +00:00
|
|
|
this->vips = linked_list_create();
|
2006-07-12 11:42:36 +00:00
|
|
|
this->policies = linked_list_create();
|
|
|
|
pthread_mutex_init(&(this->rep_mutex),NULL);
|
|
|
|
pthread_mutex_init(&(this->pol_mutex),NULL);
|
2007-02-28 14:04:36 +00:00
|
|
|
pthread_mutex_init(&(this->vip_mutex),NULL);
|
2005-12-05 16:09:42 +00:00
|
|
|
pthread_cond_init(&(this->condvar),NULL);
|
|
|
|
this->seq = 0;
|
2006-05-31 14:23:15 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
/* open xfrm netlink socket */
|
|
|
|
this->xfrm_socket = socket(PF_NETLINK, SOCK_RAW, NETLINK_XFRM);
|
|
|
|
if (this->xfrm_socket <= 0)
|
2005-12-05 16:09:42 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
DBG1(DBG_KNL, "Unable to create xfrm netlink socket");
|
|
|
|
goto kill;
|
2005-12-05 16:09:42 +00:00
|
|
|
}
|
2006-06-22 06:36:28 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
/* bind the xfrm socket and reqister for ACQUIRE & EXPIRE */
|
|
|
|
addr_xfrm.nl_family = AF_NETLINK;
|
2007-03-02 17:08:38 +00:00
|
|
|
addr_xfrm.nl_pid = 0;
|
2007-02-28 14:04:36 +00:00
|
|
|
addr_xfrm.nl_groups = XFRMGRP_ACQUIRE | XFRMGRP_EXPIRE;
|
|
|
|
if (bind(this->xfrm_socket, (struct sockaddr*)&addr_xfrm, sizeof(addr_xfrm)))
|
2006-05-31 14:23:15 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
DBG1(DBG_KNL, "Unable to bind xfrm netlink socket");
|
|
|
|
goto kill_xfrm;
|
2006-05-31 14:23:15 +00:00
|
|
|
}
|
2005-12-05 16:09:42 +00:00
|
|
|
|
2007-02-28 14:04:36 +00:00
|
|
|
if (pthread_create(&this->xfrm_thread, NULL,
|
|
|
|
(void*(*)(void*))receive_xfrm_messages, this))
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "Unable to create xfrm netlink thread");
|
|
|
|
goto kill_xfrm;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* open rt netlink socket */
|
|
|
|
this->rt_socket = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
|
|
|
|
if (this->rt_socket <= 0)
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "Unable to create rt netlink socket");
|
|
|
|
goto kill_xfrm_all;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* bind the socket_rt */
|
|
|
|
addr_rt.nl_family = AF_NETLINK;
|
2007-03-02 17:08:38 +00:00
|
|
|
addr_rt.nl_pid = 0;
|
2007-02-28 14:04:36 +00:00
|
|
|
addr_rt.nl_groups = 0;
|
|
|
|
if (bind(this->rt_socket, (struct sockaddr*)&addr_rt, sizeof(addr_rt)))
|
2005-12-05 16:09:42 +00:00
|
|
|
{
|
2007-02-28 14:04:36 +00:00
|
|
|
DBG1(DBG_KNL, "Unable to bind rt netlink socket");
|
|
|
|
goto kill_rt;
|
2005-12-05 16:09:42 +00:00
|
|
|
}
|
2005-12-04 19:05:52 +00:00
|
|
|
|
2007-03-02 17:08:38 +00:00
|
|
|
if (pthread_create(&this->rt_thread, NULL,
|
2007-02-28 14:04:36 +00:00
|
|
|
(void*(*)(void*))receive_rt_messages, this))
|
|
|
|
{
|
|
|
|
DBG1(DBG_KNL, "Unable to create rt netlink thread");
|
|
|
|
goto kill_rt;
|
|
|
|
}
|
|
|
|
|
2006-07-12 11:42:36 +00:00
|
|
|
return &this->public;
|
2007-02-28 14:04:36 +00:00
|
|
|
|
|
|
|
kill_rt:
|
|
|
|
close(this->rt_socket);
|
|
|
|
kill_xfrm_all:
|
|
|
|
pthread_cancel(this->xfrm_thread);
|
|
|
|
pthread_join(this->xfrm_thread, NULL);
|
|
|
|
kill_xfrm:
|
|
|
|
close(this->xfrm_socket);
|
|
|
|
kill:
|
|
|
|
this->responses->destroy(this->responses);
|
|
|
|
this->policies->destroy(this->policies);
|
|
|
|
this->vips->destroy(this->vips);
|
|
|
|
free(this);
|
|
|
|
charon->kill(charon, "Unable to create kernel_interface");
|
|
|
|
return NULL;
|
2005-12-04 19:05:52 +00:00
|
|
|
}
|
2007-02-28 14:04:36 +00:00
|
|
|
|
|
|
|
/* vim: set ts=4 sw=4 noet: */
|
|
|
|
|