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strongswan/src/libfreeswan/pfkey_v2_build.c

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/*
* RFC2367 PF_KEYv2 Key management API message parser
* Copyright (C) 1999, 2000, 2001 Richard Guy Briggs.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* RCSID $Id: pfkey_v2_build.c,v 1.4 2005/04/07 19:43:52 as Exp $
*/
/*
* Template from klips/net/ipsec/ipsec/ipsec_parser.c.
*/
char pfkey_v2_build_c_version[] = "$Id: pfkey_v2_build.c,v 1.4 2005/04/07 19:43:52 as Exp $";
/*
* Some ugly stuff to allow consistent debugging code for use in the
* kernel and in user space
*/
#ifdef __KERNEL__
# include <linux/kernel.h> /* for printk */
# include "freeswan/ipsec_kversion.h" /* for malloc switch */
# ifdef MALLOC_SLAB
# include <linux/slab.h> /* kmalloc() */
# else /* MALLOC_SLAB */
# include <linux/malloc.h> /* kmalloc() */
# endif /* MALLOC_SLAB */
# include <linux/errno.h> /* error codes */
# include <linux/types.h> /* size_t */
# include <linux/interrupt.h> /* mark_bh */
# include <linux/netdevice.h> /* struct device, and other headers */
# include <linux/etherdevice.h> /* eth_type_trans */
# include <linux/ip.h> /* struct iphdr */
# if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
# include <linux/ipv6.h> /* struct ipv6hdr */
# endif /* if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
# define MALLOC(size) kmalloc(size, GFP_ATOMIC)
# define FREE(obj) kfree(obj)
# include <freeswan.h>
#else /* __KERNEL__ */
# include <sys/types.h>
# include <linux/types.h>
# include <linux/errno.h>
# include <malloc.h>
# include <string.h> /* memset */
# include <freeswan.h>
unsigned int pfkey_lib_debug = 0;
void (*pfkey_debug_func)(const char *message, ...) PRINTF_LIKE(1);
/* #define PLUTO */
#define DEBUGGING(args...) if(pfkey_lib_debug) { \
if(pfkey_debug_func != NULL) { \
(*pfkey_debug_func)("pfkey_lib_debug:" args); \
} else { \
printf("pfkey_lib_debug:" args); \
} }
# define MALLOC(size) malloc(size)
# define FREE(obj) free(obj)
#endif /* __KERNEL__ */
#include <pfkeyv2.h>
#include <pfkey.h>
#ifdef __KERNEL__
#include "freeswan/radij.h" /* rd_nodes */
#include "freeswan/ipsec_encap.h" /* sockaddr_encap */
# define DEBUGGING(args...) \
KLIPS_PRINT(debug_pfkey, "klips_debug:" args)
#endif /* __KERNEL__ */
#include "ipsec_sa.h" /* IPSEC_SAREF_NULL, IPSEC_SA_REF_TABLE_IDX_WIDTH */
#define SENDERR(_x) do { error = -(_x); goto errlab; } while (0)
void
pfkey_extensions_init(struct sadb_ext *extensions[SADB_EXT_MAX + 1])
{
int i;
for (i = 0; i != SADB_EXT_MAX + 1; i++) {
extensions[i] = NULL;
}
}
void
pfkey_extensions_free(struct sadb_ext *extensions[SADB_EXT_MAX + 1])
{
int i;
if (!extensions) {
return;
}
if (extensions[0]) {
memset(extensions[0], 0, sizeof(struct sadb_msg));
FREE(extensions[0]);
extensions[0] = NULL;
}
for (i = 1; i != SADB_EXT_MAX + 1; i++) {
if(extensions[i]) {
memset(extensions[i], 0, extensions[i]->sadb_ext_len * IPSEC_PFKEYv2_ALIGN);
FREE(extensions[i]);
extensions[i] = NULL;
}
}
}
void
pfkey_msg_free(struct sadb_msg **pfkey_msg)
{
if (*pfkey_msg) {
memset(*pfkey_msg, 0, (*pfkey_msg)->sadb_msg_len * IPSEC_PFKEYv2_ALIGN);
FREE(*pfkey_msg);
*pfkey_msg = NULL;
}
}
/* Default extension builders taken from the KLIPS code */
int
pfkey_msg_hdr_build(struct sadb_ext** pfkey_ext,
uint8_t msg_type,
uint8_t satype,
uint8_t msg_errno,
uint32_t seq,
uint32_t pid)
{
int error = 0;
struct sadb_msg *pfkey_msg = (struct sadb_msg *)*pfkey_ext;
DEBUGGING(
"pfkey_msg_hdr_build:\n");
DEBUGGING(
"pfkey_msg_hdr_build: "
"on_entry &pfkey_ext=0p%p pfkey_ext=0p%p *pfkey_ext=0p%p.\n",
&pfkey_ext,
pfkey_ext,
*pfkey_ext);
/* sanity checks... */
if (pfkey_msg) {
DEBUGGING(
"pfkey_msg_hdr_build: "
"why is pfkey_msg already pointing to something?\n");
SENDERR(EINVAL);
}
if (!msg_type) {
DEBUGGING(
"pfkey_msg_hdr_build: "
"msg type not set, must be non-zero..\n");
SENDERR(EINVAL);
}
if (msg_type > SADB_MAX) {
DEBUGGING(
"pfkey_msg_hdr_build: "
"msg type too large:%d.\n",
msg_type);
SENDERR(EINVAL);
}
if (satype > SADB_SATYPE_MAX) {
DEBUGGING(
"pfkey_msg_hdr_build: "
"satype %d > max %d\n",
satype, SADB_SATYPE_MAX);
SENDERR(EINVAL);
}
pfkey_msg = (struct sadb_msg*)MALLOC(sizeof(struct sadb_msg));
*pfkey_ext = (struct sadb_ext*)pfkey_msg;
if (pfkey_msg == NULL) {
DEBUGGING(
"pfkey_msg_hdr_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_msg, 0, sizeof(struct sadb_msg));
pfkey_msg->sadb_msg_len = sizeof(struct sadb_msg) / IPSEC_PFKEYv2_ALIGN;
pfkey_msg->sadb_msg_type = msg_type;
pfkey_msg->sadb_msg_satype = satype;
pfkey_msg->sadb_msg_version = PF_KEY_V2;
pfkey_msg->sadb_msg_errno = msg_errno;
pfkey_msg->sadb_msg_reserved = 0;
pfkey_msg->sadb_msg_seq = seq;
pfkey_msg->sadb_msg_pid = pid;
DEBUGGING(
"pfkey_msg_hdr_build: "
"on_exit &pfkey_ext=0p%p pfkey_ext=0p%p *pfkey_ext=0p%p.\n",
&pfkey_ext,
pfkey_ext,
*pfkey_ext);
errlab:
return error;
}
int
pfkey_sa_ref_build(struct sadb_ext ** pfkey_ext,
uint16_t exttype,
uint32_t spi,
uint8_t replay_window,
uint8_t sa_state,
uint8_t auth,
uint8_t encrypt,
uint32_t flags,
uint32_t/*IPsecSAref_t*/ ref)
{
int error = 0;
struct sadb_sa *pfkey_sa = (struct sadb_sa *)*pfkey_ext;
DEBUGGING(
"pfkey_sa_build: "
"spi=%08x replay=%d sa_state=%d auth=%d encrypt=%d flags=%d\n",
ntohl(spi), /* in network order */
replay_window,
sa_state,
auth,
encrypt,
flags);
/* sanity checks... */
if (pfkey_sa) {
DEBUGGING(
"pfkey_sa_build: "
"why is pfkey_sa already pointing to something?\n");
SENDERR(EINVAL);
}
if (exttype != SADB_EXT_SA
&& exttype != SADB_X_EXT_SA2) {
DEBUGGING(
"pfkey_sa_build: "
"invalid exttype=%d.\n",
exttype);
SENDERR(EINVAL);
}
if (replay_window > 64) {
DEBUGGING(
"pfkey_sa_build: "
"replay window size: %d -- must be 0 <= size <= 64\n",
replay_window);
SENDERR(EINVAL);
}
if (auth > SADB_AALG_MAX) {
DEBUGGING(
"pfkey_sa_build: "
"auth=%d > SADB_AALG_MAX=%d.\n",
auth,
SADB_AALG_MAX);
SENDERR(EINVAL);
}
if (encrypt > SADB_EALG_MAX) {
DEBUGGING(
"pfkey_sa_build: "
"encrypt=%d > SADB_EALG_MAX=%d.\n",
encrypt,
SADB_EALG_MAX);
SENDERR(EINVAL);
}
if (sa_state > SADB_SASTATE_MAX) {
DEBUGGING(
"pfkey_sa_build: "
"sa_state=%d exceeds MAX=%d.\n",
sa_state,
SADB_SASTATE_MAX);
SENDERR(EINVAL);
}
if (sa_state == SADB_SASTATE_DEAD) {
DEBUGGING(
"pfkey_sa_build: "
"sa_state=%d is DEAD=%d is not allowed.\n",
sa_state,
SADB_SASTATE_DEAD);
SENDERR(EINVAL);
}
if ((IPSEC_SAREF_NULL != ref) && (ref >= (1 << IPSEC_SA_REF_TABLE_IDX_WIDTH))) {
DEBUGGING(
"pfkey_sa_build: "
"SAref=%d must be (SAref == IPSEC_SAREF_NULL(%d) || SAref < IPSEC_SA_REF_TABLE_NUM_ENTRIES(%d)).\n",
ref,
IPSEC_SAREF_NULL,
IPSEC_SA_REF_TABLE_NUM_ENTRIES);
SENDERR(EINVAL);
}
pfkey_sa = (struct sadb_sa*)MALLOC(sizeof(struct sadb_sa));
*pfkey_ext = (struct sadb_ext*)pfkey_sa;
if (pfkey_sa == NULL) {
DEBUGGING(
"pfkey_sa_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_sa, 0, sizeof(struct sadb_sa));
pfkey_sa->sadb_sa_len = sizeof(*pfkey_sa) / IPSEC_PFKEYv2_ALIGN;
pfkey_sa->sadb_sa_exttype = exttype;
pfkey_sa->sadb_sa_spi = spi;
pfkey_sa->sadb_sa_replay = replay_window;
pfkey_sa->sadb_sa_state = sa_state;
pfkey_sa->sadb_sa_auth = auth;
pfkey_sa->sadb_sa_encrypt = encrypt;
pfkey_sa->sadb_sa_flags = flags;
pfkey_sa->sadb_x_sa_ref = ref;
errlab:
return error;
}
int
pfkey_sa_build(struct sadb_ext ** pfkey_ext,
uint16_t exttype,
uint32_t spi,
uint8_t replay_window,
uint8_t sa_state,
uint8_t auth,
uint8_t encrypt,
uint32_t flags)
{
return pfkey_sa_ref_build(pfkey_ext,
exttype,
spi,
replay_window,
sa_state,
auth,
encrypt,
flags,
IPSEC_SAREF_NULL);
}
int
pfkey_lifetime_build(struct sadb_ext ** pfkey_ext,
uint16_t exttype,
uint32_t allocations,
uint64_t bytes,
uint64_t addtime,
uint64_t usetime,
uint32_t packets)
{
int error = 0;
struct sadb_lifetime *pfkey_lifetime = (struct sadb_lifetime *)*pfkey_ext;
DEBUGGING(
"pfkey_lifetime_build:\n");
/* sanity checks... */
if (pfkey_lifetime) {
DEBUGGING(
"pfkey_lifetime_build: "
"why is pfkey_lifetime already pointing to something?\n");
SENDERR(EINVAL);
}
if (exttype != SADB_EXT_LIFETIME_CURRENT
&& exttype != SADB_EXT_LIFETIME_HARD
&& exttype != SADB_EXT_LIFETIME_SOFT) {
DEBUGGING(
"pfkey_lifetime_build: "
"invalid exttype=%d.\n",
exttype);
SENDERR(EINVAL);
}
pfkey_lifetime = (struct sadb_lifetime*)MALLOC(sizeof(struct sadb_lifetime));
*pfkey_ext = (struct sadb_ext*)pfkey_lifetime;
if (pfkey_lifetime == NULL) {
DEBUGGING(
"pfkey_lifetime_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_lifetime, 0, sizeof(struct sadb_lifetime));
pfkey_lifetime->sadb_lifetime_len = sizeof(struct sadb_lifetime) / IPSEC_PFKEYv2_ALIGN;
pfkey_lifetime->sadb_lifetime_exttype = exttype;
pfkey_lifetime->sadb_lifetime_allocations = allocations;
pfkey_lifetime->sadb_lifetime_bytes = bytes;
pfkey_lifetime->sadb_lifetime_addtime = addtime;
pfkey_lifetime->sadb_lifetime_usetime = usetime;
pfkey_lifetime->sadb_x_lifetime_packets = packets;
errlab:
return error;
}
int
pfkey_address_build(struct sadb_ext** pfkey_ext,
uint16_t exttype,
uint8_t proto,
uint8_t prefixlen,
struct sockaddr* address)
{
int error = 0;
int saddr_len = 0;
char ipaddr_txt[ADDRTOT_BUF + 6/*extra for port number*/];
struct sadb_address *pfkey_address = (struct sadb_address *)*pfkey_ext;
DEBUGGING(
"pfkey_address_build: "
"exttype=%d proto=%d prefixlen=%d\n",
exttype,
proto,
prefixlen);
/* sanity checks... */
if (pfkey_address) {
DEBUGGING(
"pfkey_address_build: "
"why is pfkey_address already pointing to something?\n");
SENDERR(EINVAL);
}
if (!address) {
DEBUGGING("pfkey_address_build: "
"address is NULL\n");
SENDERR(EINVAL);
}
switch(exttype) {
case SADB_EXT_ADDRESS_SRC:
case SADB_EXT_ADDRESS_DST:
case SADB_EXT_ADDRESS_PROXY:
case SADB_X_EXT_ADDRESS_DST2:
case SADB_X_EXT_ADDRESS_SRC_FLOW:
case SADB_X_EXT_ADDRESS_DST_FLOW:
case SADB_X_EXT_ADDRESS_SRC_MASK:
case SADB_X_EXT_ADDRESS_DST_MASK:
#ifdef NAT_TRAVERSAL
case SADB_X_EXT_NAT_T_OA:
#endif
break;
default:
DEBUGGING(
"pfkey_address_build: "
"unrecognised ext_type=%d.\n",
exttype);
SENDERR(EINVAL);
}
switch (address->sa_family) {
case AF_INET:
DEBUGGING(
"pfkey_address_build: "
"found address family AF_INET.\n");
saddr_len = sizeof(struct sockaddr_in);
sprintf(ipaddr_txt, "%d.%d.%d.%d:%d"
, (((struct sockaddr_in*)address)->sin_addr.s_addr >> 0) & 0xFF
, (((struct sockaddr_in*)address)->sin_addr.s_addr >> 8) & 0xFF
, (((struct sockaddr_in*)address)->sin_addr.s_addr >> 16) & 0xFF
, (((struct sockaddr_in*)address)->sin_addr.s_addr >> 24) & 0xFF
, ntohs(((struct sockaddr_in*)address)->sin_port));
break;
case AF_INET6:
DEBUGGING(
"pfkey_address_build: "
"found address family AF_INET6.\n");
saddr_len = sizeof(struct sockaddr_in6);
sprintf(ipaddr_txt, "%x:%x:%x:%x:%x:%x:%x:%x-%x"
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[0])
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[1])
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[2])
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[3])
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[4])
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[5])
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[6])
, ntohs(((struct sockaddr_in6*)address)->sin6_addr.s6_addr16[7])
, ntohs(((struct sockaddr_in6*)address)->sin6_port));
break;
default:
DEBUGGING(
"pfkey_address_build: "
"address->sa_family=%d not supported.\n",
address->sa_family);
SENDERR(EPFNOSUPPORT);
}
DEBUGGING(
"pfkey_address_build: "
"found address=%s.\n",
ipaddr_txt);
if (prefixlen != 0) {
DEBUGGING(
"pfkey_address_build: "
"address prefixes not supported yet.\n");
SENDERR(EAFNOSUPPORT); /* not supported yet */
}
pfkey_address = (struct sadb_address*)
MALLOC(ALIGN_N(sizeof(struct sadb_address) + saddr_len, IPSEC_PFKEYv2_ALIGN));
*pfkey_ext = (struct sadb_ext*)pfkey_address;
if (pfkey_address == NULL) {
DEBUGGING(
"pfkey_lifetime_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_address,
0,
ALIGN_N(sizeof(struct sadb_address) + saddr_len,
IPSEC_PFKEYv2_ALIGN));
pfkey_address->sadb_address_len = DIVUP(sizeof(struct sadb_address) + saddr_len,
IPSEC_PFKEYv2_ALIGN);
pfkey_address->sadb_address_exttype = exttype;
pfkey_address->sadb_address_proto = proto;
pfkey_address->sadb_address_prefixlen = prefixlen;
pfkey_address->sadb_address_reserved = 0;
memcpy((char*)pfkey_address + sizeof(struct sadb_address),
address,
saddr_len);
#if 0
for (i = 0; i < sizeof(struct sockaddr_in) - offsetof(struct sockaddr_in, sin_zero); i++) {
pfkey_address_s_ska.sin_zero[i] = 0;
}
#endif
DEBUGGING(
"pfkey_address_build: "
"successful.\n");
errlab:
return error;
}
int
pfkey_key_build(struct sadb_ext** pfkey_ext,
uint16_t exttype,
uint16_t key_bits,
char* key)
{
int error = 0;
struct sadb_key *pfkey_key = (struct sadb_key *)*pfkey_ext;
DEBUGGING(
"pfkey_key_build:\n");
/* sanity checks... */
if (pfkey_key) {
DEBUGGING(
"pfkey_key_build: "
"why is pfkey_key already pointing to something?\n");
SENDERR(EINVAL);
}
if (!key_bits) {
DEBUGGING(
"pfkey_key_build: "
"key_bits is zero, it must be non-zero.\n");
SENDERR(EINVAL);
}
if ( !((exttype == SADB_EXT_KEY_AUTH) || (exttype == SADB_EXT_KEY_ENCRYPT))) {
DEBUGGING(
"pfkey_key_build: "
"unsupported extension type=%d.\n",
exttype);
SENDERR(EINVAL);
}
pfkey_key = (struct sadb_key*)
MALLOC(sizeof(struct sadb_key) +
DIVUP(key_bits, 64) * IPSEC_PFKEYv2_ALIGN);
*pfkey_ext = (struct sadb_ext*)pfkey_key;
if (pfkey_key == NULL) {
DEBUGGING(
"pfkey_key_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_key,
0,
sizeof(struct sadb_key) +
DIVUP(key_bits, 64) * IPSEC_PFKEYv2_ALIGN);
pfkey_key->sadb_key_len = DIVUP(sizeof(struct sadb_key) * IPSEC_PFKEYv2_ALIGN + key_bits,
64);
pfkey_key->sadb_key_exttype = exttype;
pfkey_key->sadb_key_bits = key_bits;
pfkey_key->sadb_key_reserved = 0;
memcpy((char*)pfkey_key + sizeof(struct sadb_key),
key,
DIVUP(key_bits, 8));
errlab:
return error;
}
int
pfkey_ident_build(struct sadb_ext** pfkey_ext,
uint16_t exttype,
uint16_t ident_type,
uint64_t ident_id,
uint8_t ident_len,
char* ident_string)
{
int error = 0;
struct sadb_ident *pfkey_ident = (struct sadb_ident *)*pfkey_ext;
int data_len = ident_len * IPSEC_PFKEYv2_ALIGN - sizeof(struct sadb_ident);
DEBUGGING(
"pfkey_ident_build:\n");
/* sanity checks... */
if (pfkey_ident) {
DEBUGGING(
"pfkey_ident_build: "
"why is pfkey_ident already pointing to something?\n");
SENDERR(EINVAL);
}
if ( !((exttype == SADB_EXT_IDENTITY_SRC) ||
(exttype == SADB_EXT_IDENTITY_DST))) {
DEBUGGING(
"pfkey_ident_build: "
"unsupported extension type=%d.\n",
exttype);
SENDERR(EINVAL);
}
if (ident_type == SADB_IDENTTYPE_RESERVED) {
DEBUGGING(
"pfkey_ident_build: "
"ident_type must be non-zero.\n");
SENDERR(EINVAL);
}
if (ident_type > SADB_IDENTTYPE_MAX) {
DEBUGGING(
"pfkey_ident_build: "
"identtype=%d out of range.\n",
ident_type);
SENDERR(EINVAL);
}
if ((ident_type == SADB_IDENTTYPE_PREFIX ||
ident_type == SADB_IDENTTYPE_FQDN) &&
!ident_string) {
DEBUGGING(
"pfkey_ident_build: "
"string required to allocate size of extension.\n");
SENDERR(EINVAL);
}
#if 0
if (ident_type == SADB_IDENTTYPE_USERFQDN) {
}
#endif
pfkey_ident = (struct sadb_ident*)
MALLOC(ident_len * IPSEC_PFKEYv2_ALIGN);
*pfkey_ext = (struct sadb_ext*)pfkey_ident;
if (pfkey_ident == NULL) {
DEBUGGING(
"pfkey_ident_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_ident, 0, ident_len * IPSEC_PFKEYv2_ALIGN);
pfkey_ident->sadb_ident_len = ident_len;
pfkey_ident->sadb_ident_exttype = exttype;
pfkey_ident->sadb_ident_type = ident_type;
pfkey_ident->sadb_ident_reserved = 0;
pfkey_ident->sadb_ident_id = ident_id;
memcpy((char*)pfkey_ident + sizeof(struct sadb_ident),
ident_string,
data_len);
errlab:
return error;
}
int
pfkey_sens_build(struct sadb_ext** pfkey_ext,
uint32_t dpd,
uint8_t sens_level,
uint8_t sens_len,
uint64_t* sens_bitmap,
uint8_t integ_level,
uint8_t integ_len,
uint64_t* integ_bitmap)
{
int error = 0;
struct sadb_sens *pfkey_sens = (struct sadb_sens *)*pfkey_ext;
int i;
uint64_t* bitmap;
DEBUGGING(
"pfkey_sens_build:\n");
/* sanity checks... */
if (pfkey_sens) {
DEBUGGING(
"pfkey_sens_build: "
"why is pfkey_sens already pointing to something?\n");
SENDERR(EINVAL);
}
DEBUGGING(
"pfkey_sens_build: "
"Sorry, I can't build exttype=%d yet.\n",
(*pfkey_ext)->sadb_ext_type);
SENDERR(EINVAL); /* don't process these yet */
pfkey_sens = (struct sadb_sens*)
MALLOC(sizeof(struct sadb_sens) +
(sens_len + integ_len) * sizeof(uint64_t));
*pfkey_ext = (struct sadb_ext*)pfkey_sens;
if (pfkey_sens == NULL) {
DEBUGGING(
"pfkey_sens_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_sens,
0,
sizeof(struct sadb_sens) +
(sens_len + integ_len) * sizeof(uint64_t));
pfkey_sens->sadb_sens_len = (sizeof(struct sadb_sens) +
(sens_len + integ_len) * sizeof(uint64_t)) / IPSEC_PFKEYv2_ALIGN;
pfkey_sens->sadb_sens_exttype = SADB_EXT_SENSITIVITY;
pfkey_sens->sadb_sens_dpd = dpd;
pfkey_sens->sadb_sens_sens_level = sens_level;
pfkey_sens->sadb_sens_sens_len = sens_len;
pfkey_sens->sadb_sens_integ_level = integ_level;
pfkey_sens->sadb_sens_integ_len = integ_len;
pfkey_sens->sadb_sens_reserved = 0;
bitmap = (uint64_t*)((char*)pfkey_ext + sizeof(struct sadb_sens));
for (i = 0; i < sens_len; i++) {
*bitmap = sens_bitmap[i];
bitmap++;
}
for (i = 0; i < integ_len; i++) {
*bitmap = integ_bitmap[i];
bitmap++;
}
errlab:
return error;
}
int
pfkey_prop_build(struct sadb_ext** pfkey_ext,
uint8_t replay,
unsigned int comb_num,
struct sadb_comb* comb)
{
int error = 0;
int i;
struct sadb_prop *pfkey_prop = (struct sadb_prop *)*pfkey_ext;
struct sadb_comb *combp;
DEBUGGING(
"pfkey_prop_build:\n");
/* sanity checks... */
if (pfkey_prop) {
DEBUGGING(
"pfkey_prop_build: "
"why is pfkey_prop already pointing to something?\n");
SENDERR(EINVAL);
}
pfkey_prop = (struct sadb_prop*)
MALLOC(sizeof(struct sadb_prop) +
comb_num * sizeof(struct sadb_comb));
*pfkey_ext = (struct sadb_ext*)pfkey_prop;
if (pfkey_prop == NULL) {
DEBUGGING(
"pfkey_prop_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_prop,
0,
sizeof(struct sadb_prop) +
comb_num * sizeof(struct sadb_comb));
pfkey_prop->sadb_prop_len = (sizeof(struct sadb_prop) +
comb_num * sizeof(struct sadb_comb)) / IPSEC_PFKEYv2_ALIGN;
pfkey_prop->sadb_prop_exttype = SADB_EXT_PROPOSAL;
pfkey_prop->sadb_prop_replay = replay;
for (i=0; i<3; i++) {
pfkey_prop->sadb_prop_reserved[i] = 0;
}
combp = (struct sadb_comb*)((char*)*pfkey_ext + sizeof(struct sadb_prop));
for (i = 0; i < comb_num; i++) {
memcpy (combp, &(comb[i]), sizeof(struct sadb_comb));
combp++;
}
#if 0
uint8_t sadb_comb_auth;
uint8_t sadb_comb_encrypt;
uint16_t sadb_comb_flags;
uint16_t sadb_comb_auth_minbits;
uint16_t sadb_comb_auth_maxbits;
uint16_t sadb_comb_encrypt_minbits;
uint16_t sadb_comb_encrypt_maxbits;
uint32_t sadb_comb_reserved;
uint32_t sadb_comb_soft_allocations;
uint32_t sadb_comb_hard_allocations;
uint64_t sadb_comb_soft_bytes;
uint64_t sadb_comb_hard_bytes;
uint64_t sadb_comb_soft_addtime;
uint64_t sadb_comb_hard_addtime;
uint64_t sadb_comb_soft_usetime;
uint64_t sadb_comb_hard_usetime;
uint32_t sadb_comb_soft_packets;
uint32_t sadb_comb_hard_packets;
#endif
errlab:
return error;
}
int
pfkey_supported_build(struct sadb_ext** pfkey_ext,
uint16_t exttype,
unsigned int alg_num,
struct sadb_alg* alg)
{
int error = 0;
unsigned int i;
struct sadb_supported *pfkey_supported = (struct sadb_supported *)*pfkey_ext;
struct sadb_alg *pfkey_alg;
/* sanity checks... */
if (pfkey_supported) {
DEBUGGING(
"pfkey_supported_build: "
"why is pfkey_supported already pointing to something?\n");
SENDERR(EINVAL);
}
if ( !((exttype == SADB_EXT_SUPPORTED_AUTH) || (exttype == SADB_EXT_SUPPORTED_ENCRYPT))) {
DEBUGGING(
"pfkey_supported_build: "
"unsupported extension type=%d.\n",
exttype);
SENDERR(EINVAL);
}
pfkey_supported = (struct sadb_supported*)
MALLOC(sizeof(struct sadb_supported) +
alg_num * sizeof(struct sadb_alg));
*pfkey_ext = (struct sadb_ext*)pfkey_supported;
if (pfkey_supported == NULL) {
DEBUGGING(
"pfkey_supported_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_supported,
0,
sizeof(struct sadb_supported) +
alg_num *
sizeof(struct sadb_alg));
pfkey_supported->sadb_supported_len = (sizeof(struct sadb_supported) +
alg_num *
sizeof(struct sadb_alg)) /
IPSEC_PFKEYv2_ALIGN;
pfkey_supported->sadb_supported_exttype = exttype;
pfkey_supported->sadb_supported_reserved = 0;
pfkey_alg = (struct sadb_alg*)((char*)pfkey_supported + sizeof(struct sadb_supported));
for(i = 0; i < alg_num; i++) {
memcpy (pfkey_alg, &(alg[i]), sizeof(struct sadb_alg));
pfkey_alg->sadb_alg_reserved = 0;
pfkey_alg++;
}
#if 0
DEBUGGING(
"pfkey_supported_build: "
"Sorry, I can't build exttype=%d yet.\n",
(*pfkey_ext)->sadb_ext_type);
SENDERR(EINVAL); /* don't process these yet */
uint8_t sadb_alg_id;
uint8_t sadb_alg_ivlen;
uint16_t sadb_alg_minbits;
uint16_t sadb_alg_maxbits;
uint16_t sadb_alg_reserved;
#endif
errlab:
return error;
}
int
pfkey_spirange_build(struct sadb_ext** pfkey_ext,
uint16_t exttype,
uint32_t min, /* in network order */
uint32_t max) /* in network order */
{
int error = 0;
struct sadb_spirange *pfkey_spirange = (struct sadb_spirange *)*pfkey_ext;
/* sanity checks... */
if (pfkey_spirange) {
DEBUGGING(
"pfkey_spirange_build: "
"why is pfkey_spirange already pointing to something?\n");
SENDERR(EINVAL);
}
if (ntohl(max) < ntohl(min)) {
DEBUGGING(
"pfkey_spirange_build: "
"minspi=%08x must be < maxspi=%08x.\n",
ntohl(min),
ntohl(max));
SENDERR(EINVAL);
}
if (ntohl(min) <= 255) {
DEBUGGING(
"pfkey_spirange_build: "
"minspi=%08x must be > 255.\n",
ntohl(min));
SENDERR(EEXIST);
}
pfkey_spirange = (struct sadb_spirange*)
MALLOC(sizeof(struct sadb_spirange));
*pfkey_ext = (struct sadb_ext*)pfkey_spirange;
if (pfkey_spirange == NULL) {
DEBUGGING(
"pfkey_spirange_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_spirange,
0,
sizeof(struct sadb_spirange));
pfkey_spirange->sadb_spirange_len = sizeof(struct sadb_spirange) / IPSEC_PFKEYv2_ALIGN;
pfkey_spirange->sadb_spirange_exttype = SADB_EXT_SPIRANGE;
pfkey_spirange->sadb_spirange_min = min;
pfkey_spirange->sadb_spirange_max = max;
pfkey_spirange->sadb_spirange_reserved = 0;
errlab:
return error;
}
int
pfkey_x_kmprivate_build(struct sadb_ext** pfkey_ext)
{
int error = 0;
struct sadb_x_kmprivate *pfkey_x_kmprivate = (struct sadb_x_kmprivate *)*pfkey_ext;
/* sanity checks... */
if (pfkey_x_kmprivate) {
DEBUGGING(
"pfkey_x_kmprivate_build: "
"why is pfkey_x_kmprivate already pointing to something?\n");
SENDERR(EINVAL);
}
pfkey_x_kmprivate->sadb_x_kmprivate_reserved = 0;
DEBUGGING(
"pfkey_x_kmprivate_build: "
"Sorry, I can't build exttype=%d yet.\n",
(*pfkey_ext)->sadb_ext_type);
SENDERR(EINVAL); /* don't process these yet */
pfkey_x_kmprivate = (struct sadb_x_kmprivate*)
MALLOC(sizeof(struct sadb_x_kmprivate));
*pfkey_ext = (struct sadb_ext*)pfkey_x_kmprivate;
if (pfkey_x_kmprivate == NULL) {
DEBUGGING(
"pfkey_x_kmprivate_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_x_kmprivate,
0,
sizeof(struct sadb_x_kmprivate));
pfkey_x_kmprivate->sadb_x_kmprivate_len =
sizeof(struct sadb_x_kmprivate) / IPSEC_PFKEYv2_ALIGN;
pfkey_x_kmprivate->sadb_x_kmprivate_exttype = SADB_X_EXT_KMPRIVATE;
pfkey_x_kmprivate->sadb_x_kmprivate_reserved = 0;
errlab:
return error;
}
int
pfkey_x_satype_build(struct sadb_ext** pfkey_ext,
uint8_t satype)
{
int error = 0;
int i;
struct sadb_x_satype *pfkey_x_satype = (struct sadb_x_satype *)*pfkey_ext;
DEBUGGING(
"pfkey_x_satype_build:\n");
/* sanity checks... */
if (pfkey_x_satype) {
DEBUGGING(
"pfkey_x_satype_build: "
"why is pfkey_x_satype already pointing to something?\n");
SENDERR(EINVAL);
}
if (!satype) {
DEBUGGING(
"pfkey_x_satype_build: "
"SA type not set, must be non-zero.\n");
SENDERR(EINVAL);
}
if (satype > SADB_SATYPE_MAX) {
DEBUGGING(
"pfkey_x_satype_build: "
"satype %d > max %d\n",
satype, SADB_SATYPE_MAX);
SENDERR(EINVAL);
}
pfkey_x_satype = (struct sadb_x_satype*)
MALLOC(sizeof(struct sadb_x_satype));
*pfkey_ext = (struct sadb_ext*)pfkey_x_satype;
if (pfkey_x_satype == NULL) {
DEBUGGING(
"pfkey_x_satype_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
memset(pfkey_x_satype,
0,
sizeof(struct sadb_x_satype));
pfkey_x_satype->sadb_x_satype_len = sizeof(struct sadb_x_satype) / IPSEC_PFKEYv2_ALIGN;
pfkey_x_satype->sadb_x_satype_exttype = SADB_X_EXT_SATYPE2;
pfkey_x_satype->sadb_x_satype_satype = satype;
for (i=0; i<3; i++) {
pfkey_x_satype->sadb_x_satype_reserved[i] = 0;
}
errlab:
return error;
}
int
pfkey_x_debug_build(struct sadb_ext** pfkey_ext,
uint32_t tunnel,
uint32_t netlink,
uint32_t xform,
uint32_t eroute,
uint32_t spi,
uint32_t radij,
uint32_t esp,
uint32_t ah,
uint32_t rcv,
uint32_t pfkey,
uint32_t ipcomp,
uint32_t verbose)
{
int error = 0;
int i;
struct sadb_x_debug *pfkey_x_debug = (struct sadb_x_debug *)*pfkey_ext;
DEBUGGING(
"pfkey_x_debug_build:\n");
/* sanity checks... */
if (pfkey_x_debug) {
DEBUGGING(
"pfkey_x_debug_build: "
"why is pfkey_x_debug already pointing to something?\n");
SENDERR(EINVAL);
}
DEBUGGING(
"pfkey_x_debug_build: "
"tunnel=%x netlink=%x xform=%x eroute=%x spi=%x radij=%x esp=%x ah=%x rcv=%x pfkey=%x ipcomp=%x verbose=%x?\n",
tunnel, netlink, xform, eroute, spi, radij, esp, ah, rcv, pfkey, ipcomp, verbose);
pfkey_x_debug = (struct sadb_x_debug*)
MALLOC(sizeof(struct sadb_x_debug));
*pfkey_ext = (struct sadb_ext*)pfkey_x_debug;
if (pfkey_x_debug == NULL) {
DEBUGGING(
"pfkey_x_debug_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
#if 0
memset(pfkey_x_debug,
0,
sizeof(struct sadb_x_debug));
#endif
pfkey_x_debug->sadb_x_debug_len = sizeof(struct sadb_x_debug) / IPSEC_PFKEYv2_ALIGN;
pfkey_x_debug->sadb_x_debug_exttype = SADB_X_EXT_DEBUG;
pfkey_x_debug->sadb_x_debug_tunnel = tunnel;
pfkey_x_debug->sadb_x_debug_netlink = netlink;
pfkey_x_debug->sadb_x_debug_xform = xform;
pfkey_x_debug->sadb_x_debug_eroute = eroute;
pfkey_x_debug->sadb_x_debug_spi = spi;
pfkey_x_debug->sadb_x_debug_radij = radij;
pfkey_x_debug->sadb_x_debug_esp = esp;
pfkey_x_debug->sadb_x_debug_ah = ah;
pfkey_x_debug->sadb_x_debug_rcv = rcv;
pfkey_x_debug->sadb_x_debug_pfkey = pfkey;
pfkey_x_debug->sadb_x_debug_ipcomp = ipcomp;
pfkey_x_debug->sadb_x_debug_verbose = verbose;
for (i=0; i<4; i++) {
pfkey_x_debug->sadb_x_debug_reserved[i] = 0;
}
errlab:
return error;
}
#ifdef NAT_TRAVERSAL
int
pfkey_x_nat_t_type_build(struct sadb_ext** pfkey_ext,
uint8_t type)
{
int error = 0;
int i;
struct sadb_x_nat_t_type *pfkey_x_nat_t_type = (struct sadb_x_nat_t_type *)*pfkey_ext;
DEBUGGING(
"pfkey_x_nat_t_type_build:\n");
/* sanity checks... */
if (pfkey_x_nat_t_type) {
DEBUGGING(
"pfkey_x_nat_t_type_build: "
"why is pfkey_x_nat_t_type already pointing to something?\n");
SENDERR(EINVAL);
}
DEBUGGING(
"pfkey_x_nat_t_type_build: "
"type=%d\n", type);
pfkey_x_nat_t_type = (struct sadb_x_nat_t_type*)
MALLOC(sizeof(struct sadb_x_nat_t_type));
*pfkey_ext = (struct sadb_ext*)pfkey_x_nat_t_type;
if (pfkey_x_nat_t_type == NULL) {
DEBUGGING(
"pfkey_x_nat_t_type_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
pfkey_x_nat_t_type->sadb_x_nat_t_type_len = sizeof(struct sadb_x_nat_t_type) / IPSEC_PFKEYv2_ALIGN;
pfkey_x_nat_t_type->sadb_x_nat_t_type_exttype = SADB_X_EXT_NAT_T_TYPE;
pfkey_x_nat_t_type->sadb_x_nat_t_type_type = type;
for (i=0; i<3; i++) {
pfkey_x_nat_t_type->sadb_x_nat_t_type_reserved[i] = 0;
}
errlab:
return error;
}
int
pfkey_x_nat_t_port_build(struct sadb_ext** pfkey_ext,
uint16_t exttype,
uint16_t port)
{
int error = 0;
struct sadb_x_nat_t_port *pfkey_x_nat_t_port = (struct sadb_x_nat_t_port *)*pfkey_ext;
DEBUGGING(
"pfkey_x_nat_t_port_build:\n");
/* sanity checks... */
if (pfkey_x_nat_t_port) {
DEBUGGING(
"pfkey_x_nat_t_port_build: "
"why is pfkey_x_nat_t_port already pointing to something?\n");
SENDERR(EINVAL);
}
switch (exttype) {
case SADB_X_EXT_NAT_T_SPORT:
case SADB_X_EXT_NAT_T_DPORT:
break;
default:
DEBUGGING(
"pfkey_nat_t_port_build: "
"unrecognised ext_type=%d.\n",
exttype);
SENDERR(EINVAL);
}
DEBUGGING(
"pfkey_x_nat_t_port_build: "
"ext=%d, port=%d\n", exttype, port);
pfkey_x_nat_t_port = (struct sadb_x_nat_t_port*)
MALLOC(sizeof(struct sadb_x_nat_t_port));
*pfkey_ext = (struct sadb_ext*)pfkey_x_nat_t_port;
if (pfkey_x_nat_t_port == NULL) {
DEBUGGING(
"pfkey_x_nat_t_port_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
pfkey_x_nat_t_port->sadb_x_nat_t_port_len = sizeof(struct sadb_x_nat_t_port) / IPSEC_PFKEYv2_ALIGN;
pfkey_x_nat_t_port->sadb_x_nat_t_port_exttype = exttype;
pfkey_x_nat_t_port->sadb_x_nat_t_port_port = port;
pfkey_x_nat_t_port->sadb_x_nat_t_port_reserved = 0;
errlab:
return error;
}
#endif
int pfkey_x_protocol_build(struct sadb_ext **pfkey_ext,
uint8_t protocol)
{
int error = 0;
struct sadb_protocol * p = (struct sadb_protocol *)*pfkey_ext;
DEBUGGING("pfkey_x_protocol_build: protocol=%u\n", protocol);
/* sanity checks... */
if (p != 0) {
DEBUGGING("pfkey_x_protocol_build: bogus protocol pointer\n");
SENDERR(EINVAL);
}
if ((p = (struct sadb_protocol*)MALLOC(sizeof(*p))) == 0) {
DEBUGGING("pfkey_build: memory allocation failed\n");
SENDERR(ENOMEM);
}
*pfkey_ext = (struct sadb_ext *)p;
p->sadb_protocol_len = sizeof(*p) / sizeof(uint64_t);
p->sadb_protocol_exttype = SADB_X_EXT_PROTOCOL;
p->sadb_protocol_proto = protocol;
p->sadb_protocol_flags = 0;
p->sadb_protocol_reserved2 = 0;
errlab:
return error;
}
#if I_DONT_THINK_THIS_WILL_BE_USEFUL
int (*ext_default_builders[SADB_EXT_MAX +1])(struct sadb_msg*, struct sadb_ext*)
=
{
NULL, /* pfkey_msg_build, */
pfkey_sa_build,
pfkey_lifetime_build,
pfkey_lifetime_build,
pfkey_lifetime_build,
pfkey_address_build,
pfkey_address_build,
pfkey_address_build,
pfkey_key_build,
pfkey_key_build,
pfkey_ident_build,
pfkey_ident_build,
pfkey_sens_build,
pfkey_prop_build,
pfkey_supported_build,
pfkey_supported_build,
pfkey_spirange_build,
pfkey_x_kmprivate_build,
pfkey_x_satype_build,
pfkey_sa_build,
pfkey_address_build,
pfkey_address_build,
pfkey_address_build,
pfkey_address_build,
pfkey_address_build,
pfkey_x_ext_debug_build
};
#endif
int
pfkey_msg_build(struct sadb_msg **pfkey_msg, struct sadb_ext *extensions[], int dir)
{
int error = 0;
unsigned ext;
unsigned total_size;
struct sadb_ext *pfkey_ext;
int extensions_seen = 0;
struct sadb_ext *extensions_check[SADB_EXT_MAX + 1];
if (!extensions[0]) {
DEBUGGING(
"pfkey_msg_build: "
"extensions[0] must be specified (struct sadb_msg).\n");
SENDERR(EINVAL);
}
total_size = sizeof(struct sadb_msg) / IPSEC_PFKEYv2_ALIGN;
for (ext = 1; ext <= SADB_EXT_MAX; ext++) {
if(extensions[ext]) {
total_size += (extensions[ext])->sadb_ext_len;
}
}
if (!(*pfkey_msg = (struct sadb_msg*)MALLOC(total_size * IPSEC_PFKEYv2_ALIGN))) {
DEBUGGING(
"pfkey_msg_build: "
"memory allocation failed\n");
SENDERR(ENOMEM);
}
DEBUGGING(
"pfkey_msg_build: "
"pfkey_msg=0p%p allocated %lu bytes, &(extensions[0])=0p%p\n",
*pfkey_msg,
(unsigned long)(total_size * IPSEC_PFKEYv2_ALIGN),
&(extensions[0]));
memcpy(*pfkey_msg,
extensions[0],
sizeof(struct sadb_msg));
(*pfkey_msg)->sadb_msg_len = total_size;
(*pfkey_msg)->sadb_msg_reserved = 0;
extensions_seen = 1 ;
pfkey_ext = (struct sadb_ext*)(((char*)(*pfkey_msg)) + sizeof(struct sadb_msg));
for (ext = 1; ext <= SADB_EXT_MAX; ext++) {
/* copy from extension[ext] to buffer */
if (extensions[ext]) {
/* Is this type of extension permitted for this type of message? */
if (!(extensions_bitmaps[dir][EXT_BITS_PERM][(*pfkey_msg)->sadb_msg_type] &
1<<ext)) {
DEBUGGING(
"pfkey_msg_build: "
"ext type %d not permitted, exts_perm=%08x, 1<<type=%08x\n",
ext,
extensions_bitmaps[dir][EXT_BITS_PERM][(*pfkey_msg)->sadb_msg_type],
1<<ext);
SENDERR(EINVAL);
}
DEBUGGING(
"pfkey_msg_build: "
"copying %lu bytes from extensions[%u]=0p%p to=0p%p\n",
(unsigned long)(extensions[ext]->sadb_ext_len * IPSEC_PFKEYv2_ALIGN),
ext,
extensions[ext],
pfkey_ext);
memcpy(pfkey_ext,
extensions[ext],
(extensions[ext])->sadb_ext_len * IPSEC_PFKEYv2_ALIGN);
{
char *pfkey_ext_c = (char *)pfkey_ext;
pfkey_ext_c += (extensions[ext])->sadb_ext_len * IPSEC_PFKEYv2_ALIGN;
pfkey_ext = (struct sadb_ext *)pfkey_ext_c;
}
/* Mark that we have seen this extension and remember the header location */
extensions_seen |= ( 1 << ext );
}
}
/* check required extensions */
DEBUGGING(
"pfkey_msg_build: "
"extensions permitted=%08x, seen=%08x, required=%08x.\n",
extensions_bitmaps[dir][EXT_BITS_PERM][(*pfkey_msg)->sadb_msg_type],
extensions_seen,
extensions_bitmaps[dir][EXT_BITS_REQ][(*pfkey_msg)->sadb_msg_type]);
if ((extensions_seen &
extensions_bitmaps[dir][EXT_BITS_REQ][(*pfkey_msg)->sadb_msg_type]) !=
extensions_bitmaps[dir][EXT_BITS_REQ][(*pfkey_msg)->sadb_msg_type]) {
DEBUGGING(
"pfkey_msg_build: "
"required extensions missing:%08x.\n",
extensions_bitmaps[dir][EXT_BITS_REQ][(*pfkey_msg)->sadb_msg_type] -
(extensions_seen &
extensions_bitmaps[dir][EXT_BITS_REQ][(*pfkey_msg)->sadb_msg_type]) );
SENDERR(EINVAL);
}
error = pfkey_msg_parse(*pfkey_msg, NULL, extensions_check, dir);
if (error) {
DEBUGGING(
"pfkey_msg_build: "
"Trouble parsing newly built pfkey message, error=%d.\n",
error);
SENDERR(-error);
}
errlab:
return error;
}
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