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sp.c
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sp.c
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/* SPDX-License-Identifier: LGPL-2.1-only */
/*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/**
* @ingroup xfrmnl
* @defgroup sp Security Policy
* @brief
*/
#include "nl-default.h"
#include <netlink/netlink.h>
#include <netlink/cache.h>
#include <netlink/object.h>
#include <netlink/xfrm/selector.h>
#include <netlink/xfrm/lifetime.h>
#include <netlink/xfrm/template.h>
#include <netlink/xfrm/sp.h>
#include "nl-xfrm.h"
#include "nl-priv-dynamic-core/object-api.h"
#include "nl-priv-dynamic-core/nl-core.h"
#include "nl-priv-dynamic-core/cache-api.h"
struct xfrmnl_userpolicy_type {
uint8_t type;
uint16_t reserved1;
uint16_t reserved2;
};
struct xfrmnl_sp {
NLHDR_COMMON
struct xfrmnl_sel* sel;
struct xfrmnl_ltime_cfg* lft;
struct xfrmnl_lifetime_cur curlft;
uint32_t priority;
uint32_t index;
uint8_t dir;
uint8_t action;
uint8_t flags;
uint8_t share;
struct xfrmnl_user_sec_ctx* sec_ctx;
struct xfrmnl_userpolicy_type uptype;
uint32_t nr_user_tmpl;
struct nl_list_head usertmpl_list;
struct xfrmnl_mark mark;
};
/** @cond SKIP */
#define XFRM_SP_ATTR_SEL 0x01
#define XFRM_SP_ATTR_LTIME_CFG 0x02
#define XFRM_SP_ATTR_LTIME_CUR 0x04
#define XFRM_SP_ATTR_PRIO 0x08
#define XFRM_SP_ATTR_INDEX 0x10
#define XFRM_SP_ATTR_DIR 0x20
#define XFRM_SP_ATTR_ACTION 0x40
#define XFRM_SP_ATTR_FLAGS 0x80
#define XFRM_SP_ATTR_SHARE 0x100
#define XFRM_SP_ATTR_POLTYPE 0x200
#define XFRM_SP_ATTR_SECCTX 0x400
#define XFRM_SP_ATTR_TMPL 0x800
#define XFRM_SP_ATTR_MARK 0x1000
static struct nl_cache_ops xfrmnl_sp_ops;
static struct nl_object_ops xfrm_sp_obj_ops;
/** @endcond */
static void xfrm_sp_alloc_data(struct nl_object *c)
{
struct xfrmnl_sp* sp = nl_object_priv (c);
if ((sp->sel = xfrmnl_sel_alloc ()) == NULL)
return;
if ((sp->lft = xfrmnl_ltime_cfg_alloc ()) == NULL)
return;
nl_init_list_head(&sp->usertmpl_list);
return;
}
static void xfrm_sp_free_data(struct nl_object *c)
{
struct xfrmnl_sp* sp = nl_object_priv (c);
struct xfrmnl_user_tmpl *utmpl, *tmp;
if (sp == NULL)
return;
xfrmnl_sel_put (sp->sel);
xfrmnl_ltime_cfg_put (sp->lft);
if (sp->sec_ctx) {
free(sp->sec_ctx);
}
nl_list_for_each_entry_safe(utmpl, tmp, &sp->usertmpl_list, utmpl_list) {
xfrmnl_sp_remove_usertemplate (sp, utmpl);
xfrmnl_user_tmpl_free (utmpl);
}
}
static int xfrm_sp_clone(struct nl_object *_dst, struct nl_object *_src)
{
struct xfrmnl_sp* dst = nl_object_priv(_dst);
struct xfrmnl_sp* src = nl_object_priv(_src);
struct xfrmnl_user_tmpl *utmpl;
struct xfrmnl_user_tmpl *new;
dst->sel = NULL;
dst->lft = NULL;
dst->sec_ctx = NULL;
nl_init_list_head(&dst->usertmpl_list);
if (src->sel) {
if ((dst->sel = xfrmnl_sel_clone (src->sel)) == NULL)
return -NLE_NOMEM;
}
if (src->lft) {
if ((dst->lft = xfrmnl_ltime_cfg_clone (src->lft)) == NULL)
return -NLE_NOMEM;
}
if (src->sec_ctx) {
uint32_t len = sizeof (struct xfrmnl_user_sec_ctx) + src->sec_ctx->ctx_len;
if ((dst->sec_ctx = malloc (len)) == NULL)
return -NLE_NOMEM;
memcpy(dst->sec_ctx, src->sec_ctx, len);
}
nl_list_for_each_entry(utmpl, &src->usertmpl_list, utmpl_list) {
new = xfrmnl_user_tmpl_clone (utmpl);
if (!new)
return -NLE_NOMEM;
xfrmnl_sp_add_usertemplate(dst, new);
}
return 0;
}
static uint64_t xfrm_sp_compare(struct nl_object *_a, struct nl_object *_b,
uint64_t attrs, int flags)
{
struct xfrmnl_sp* a = (struct xfrmnl_sp *) _a;
struct xfrmnl_sp* b = (struct xfrmnl_sp *) _b;
struct xfrmnl_user_tmpl *tmpl_a, *tmpl_b;
uint64_t diff = 0;
#define _DIFF(ATTR, EXPR) ATTR_DIFF(attrs, ATTR, a, b, EXPR)
diff |= _DIFF(XFRM_SP_ATTR_SEL, xfrmnl_sel_cmp(a->sel, b->sel));
diff |= _DIFF(XFRM_SP_ATTR_LTIME_CFG,
xfrmnl_ltime_cfg_cmp(a->lft, b->lft));
diff |= _DIFF(XFRM_SP_ATTR_PRIO, a->priority != b->priority);
diff |= _DIFF(XFRM_SP_ATTR_INDEX, a->index != b->index);
diff |= _DIFF(XFRM_SP_ATTR_DIR, a->dir != b->dir);
diff |= _DIFF(XFRM_SP_ATTR_ACTION, a->action != b->action);
diff |= _DIFF(XFRM_SP_ATTR_FLAGS, a->flags != b->flags);
diff |= _DIFF(XFRM_SP_ATTR_SHARE, a->share != b->share);
diff |= _DIFF(XFRM_SP_ATTR_SECCTX,
((a->sec_ctx->len != b->sec_ctx->len) ||
(a->sec_ctx->exttype != b->sec_ctx->exttype) ||
(a->sec_ctx->ctx_alg != b->sec_ctx->ctx_alg) ||
(a->sec_ctx->ctx_doi != b->sec_ctx->ctx_doi) ||
(a->sec_ctx->ctx_len != b->sec_ctx->ctx_len) ||
strcmp(a->sec_ctx->ctx, b->sec_ctx->ctx)));
diff |= _DIFF(XFRM_SP_ATTR_POLTYPE, (a->uptype.type != b->uptype.type));
diff |= _DIFF(XFRM_SP_ATTR_TMPL, (a->nr_user_tmpl != b->nr_user_tmpl));
diff |= _DIFF(XFRM_SP_ATTR_MARK,
(a->mark.m != b->mark.m) || (a->mark.v != b->mark.v));
/* Compare the templates */
nl_list_for_each_entry(tmpl_b, &b->usertmpl_list, utmpl_list)
nl_list_for_each_entry(tmpl_a, &a->usertmpl_list, utmpl_list)
diff |= xfrmnl_user_tmpl_cmp (tmpl_a, tmpl_b);
#undef _DIFF
return diff;
}
/**
* @name XFRM SP Attribute Translations
* @{
*/
static const struct trans_tbl sp_attrs[] = {
__ADD(XFRM_SP_ATTR_SEL, selector),
__ADD(XFRM_SP_ATTR_LTIME_CFG, lifetime_cfg),
__ADD(XFRM_SP_ATTR_LTIME_CUR, lifetime_cur),
__ADD(XFRM_SP_ATTR_PRIO, priority),
__ADD(XFRM_SP_ATTR_INDEX, index),
__ADD(XFRM_SP_ATTR_DIR, direction),
__ADD(XFRM_SP_ATTR_ACTION, action),
__ADD(XFRM_SP_ATTR_FLAGS, flags),
__ADD(XFRM_SP_ATTR_SHARE, share),
__ADD(XFRM_SP_ATTR_POLTYPE, policy_type),
__ADD(XFRM_SP_ATTR_SECCTX, security_context),
__ADD(XFRM_SP_ATTR_TMPL, user_template),
__ADD(XFRM_SP_ATTR_MARK, mark),
};
static char* xfrm_sp_attrs2str(int attrs, char *buf, size_t len)
{
return __flags2str (attrs, buf, len, sp_attrs, ARRAY_SIZE(sp_attrs));
}
/** @} */
/**
* @name XFRM SP Action Translations
* @{
*/
static const struct trans_tbl sa_actions[] = {
__ADD(XFRM_POLICY_ALLOW, allow),
__ADD(XFRM_POLICY_BLOCK, block),
};
char* xfrmnl_sp_action2str(int action, char *buf, size_t len)
{
return __type2str (action, buf, len, sa_actions, ARRAY_SIZE(sa_actions));
}
int xfrmnl_sp_str2action(const char *name)
{
return __str2type (name, sa_actions, ARRAY_SIZE(sa_actions));
}
/** @} */
/**
* @name XFRM SP Flags Translations
* @{
*/
static const struct trans_tbl sp_flags[] = {
__ADD(XFRM_POLICY_LOCALOK, allow policy override by user),
__ADD(XFRM_POLICY_ICMP, auto include ICMP in policy),
};
char* xfrmnl_sp_flags2str(int flags, char *buf, size_t len)
{
return __flags2str (flags, buf, len, sp_flags, ARRAY_SIZE(sp_flags));
}
int xfrmnl_sp_str2flag(const char *name)
{
return __str2flags(name, sp_flags, ARRAY_SIZE(sp_flags));
}
/** @} */
/**
* @name XFRM SP Type Translations
* @{
*/
static const struct trans_tbl sp_types[] = {
__ADD(XFRM_POLICY_TYPE_MAIN, main),
__ADD(XFRM_POLICY_TYPE_SUB, sub),
__ADD(XFRM_POLICY_TYPE_MAX, max),
__ADD(XFRM_POLICY_TYPE_ANY, any),
};
char* xfrmnl_sp_type2str(int type, char *buf, size_t len)
{
return __type2str(type, buf, len, sp_types, ARRAY_SIZE(sp_types));
}
int xfrmnl_sp_str2type(const char *name)
{
return __str2type(name, sp_types, ARRAY_SIZE(sp_types));
}
/** @} */
/**
* @name XFRM SP Direction Translations
* @{
*/
static const struct trans_tbl sp_dir[] = {
__ADD(XFRM_POLICY_IN, in),
__ADD(XFRM_POLICY_OUT, out),
__ADD(XFRM_POLICY_FWD, fwd),
__ADD(XFRM_POLICY_MASK, mask),
};
char* xfrmnl_sp_dir2str(int dir, char *buf, size_t len)
{
return __type2str (dir, buf, len, sp_dir, ARRAY_SIZE(sp_dir));
}
int xfrmnl_sp_str2dir(const char *name)
{
return __str2type (name, sp_dir, ARRAY_SIZE(sp_dir));
}
int xfrmnl_sp_index2dir (unsigned int index)
{
return index & 0x7;
}
/** @} */
/**
* @name XFRM SP Share Translations
* @{
*/
static const struct trans_tbl sp_share[] = {
__ADD(XFRM_SHARE_ANY, any),
__ADD(XFRM_SHARE_SESSION, session),
__ADD(XFRM_SHARE_USER, user),
__ADD(XFRM_SHARE_UNIQUE, unique),
};
char* xfrmnl_sp_share2str(int share, char *buf, size_t len)
{
return __type2str (share, buf, len, sp_share, ARRAY_SIZE(sp_share));
}
int xfrmnl_sp_str2share(const char *name)
{
return __str2type (name, sp_share, ARRAY_SIZE(sp_share));
}
/** @} */
static void xfrm_sp_dump_line(struct nl_object *a, struct nl_dump_params *p)
{
struct xfrmnl_sp* sp = (struct xfrmnl_sp *) a;
char dir[32], action[32], share[32], flags[32];
char dst[INET6_ADDRSTRLEN+5], src[INET6_ADDRSTRLEN+5];
time_t add_time, use_time;
struct tm *add_time_tm, *use_time_tm;
struct tm tm_buf;
nl_addr2str(xfrmnl_sel_get_saddr (sp->sel), src, sizeof(src));
nl_addr2str (xfrmnl_sel_get_daddr (sp->sel), dst, sizeof (dst));
nl_af2str (xfrmnl_sel_get_family (sp->sel), dir, 32);
nl_dump_line(p, "src %s dst %s family: %s\n", src, dst, dir);
nl_dump_line (p, "src port/mask: %d/%d dst port/mask: %d/%d\n",
xfrmnl_sel_get_dport (sp->sel), xfrmnl_sel_get_dportmask (sp->sel),
xfrmnl_sel_get_sport (sp->sel), xfrmnl_sel_get_sportmask (sp->sel));
nl_dump_line (p, "protocol: %s ifindex: %u uid: %u\n",
nl_ip_proto2str (xfrmnl_sel_get_proto (sp->sel), dir, sizeof(dir)),
xfrmnl_sel_get_ifindex (sp->sel),
xfrmnl_sel_get_userid (sp->sel));
xfrmnl_sp_dir2str (sp->dir, dir, 32);
xfrmnl_sp_action2str (sp->action, action, 32);
xfrmnl_sp_share2str (sp->share, share, 32);
xfrmnl_sp_flags2str (sp->flags, flags, 32);
nl_dump_line(p, "\tdir: %s action: %s index: %u priority: %u share: %s flags: %s(0x%x) \n",
dir, action, sp->index, sp->priority, share, flags, sp->flags);
nl_dump_line(p, "\tlifetime configuration: \n");
if (sp->lft->soft_byte_limit == XFRM_INF)
sprintf (dir, "INF");
else
sprintf (dir, "%" PRIu64, sp->lft->soft_byte_limit);
if (sp->lft->soft_packet_limit == XFRM_INF)
sprintf (action, "INF");
else
sprintf (action, "%" PRIu64, sp->lft->soft_packet_limit);
if (sp->lft->hard_byte_limit == XFRM_INF)
sprintf (flags, "INF");
else
sprintf (flags, "%" PRIu64, sp->lft->hard_byte_limit);
if (sp->lft->hard_packet_limit == XFRM_INF)
sprintf (share, "INF");
else
sprintf (share, "%" PRIu64, sp->lft->hard_packet_limit);
nl_dump_line(p, "\t\tsoft limit: %s (bytes), %s (packets) \n", dir,
action);
nl_dump_line(p, "\t\thard limit: %s (bytes), %s (packets) \n", flags,
share);
nl_dump_line(
p,
"\t\tsoft add_time: %llu (seconds), soft use_time: %llu (seconds) \n",
(long long unsigned)sp->lft->soft_add_expires_seconds,
(long long unsigned)sp->lft->soft_use_expires_seconds);
nl_dump_line(
p,
"\t\thard add_time: %llu (seconds), hard use_time: %llu (seconds) \n",
(long long unsigned)sp->lft->hard_add_expires_seconds,
(long long unsigned)sp->lft->hard_use_expires_seconds);
nl_dump_line(p, "\tlifetime current: \n");
nl_dump_line(p, "\t\t%llu bytes, %llu packets\n",
(long long unsigned)sp->curlft.bytes,
(long long unsigned)sp->curlft.packets);
if (sp->curlft.add_time != 0)
{
add_time = sp->curlft.add_time;
add_time_tm = gmtime_r (&add_time, &tm_buf);
strftime (dst, INET6_ADDRSTRLEN+5, "%Y-%m-%d %H-%M-%S", add_time_tm);
}
else
{
sprintf (dst, "%s", "-");
}
if (sp->curlft.use_time != 0)
{
use_time = sp->curlft.use_time;
use_time_tm = gmtime_r (&use_time, &tm_buf);
strftime (src, INET6_ADDRSTRLEN+5, "%Y-%m-%d %H-%M-%S", use_time_tm);
}
else
{
sprintf (src, "%s", "-");
}
nl_dump_line(p, "\t\tadd_time: %s, use_time: %s\n", dst, src);
if (sp->ce_mask & XFRM_SP_ATTR_SECCTX)
{
nl_dump_line(p, "\tUser security context: \n");
nl_dump_line(p, "\t\tlen: %d exttype: %d Algo: %d DOI: %d ctxlen: %d\n",
sp->sec_ctx->len, sp->sec_ctx->exttype,
sp->sec_ctx->ctx_alg, sp->sec_ctx->ctx_doi, sp->sec_ctx->ctx_len);
nl_dump_line (p, "\t\tctx: %s \n", sp->sec_ctx->ctx);
}
xfrmnl_sp_type2str (sp->uptype.type, flags, 32);
if (sp->ce_mask & XFRM_SP_ATTR_POLTYPE)
nl_dump_line(p, "\tUser policy type: %s\n", flags);
if (sp->ce_mask & XFRM_SP_ATTR_TMPL)
{
struct xfrmnl_user_tmpl* utmpl;
nl_dump_line(p, "\tUser template: \n");
nl_list_for_each_entry(utmpl, &sp->usertmpl_list, utmpl_list)
xfrmnl_user_tmpl_dump (utmpl, p);
}
if (sp->ce_mask & XFRM_SP_ATTR_MARK)
nl_dump_line(p, "\tMark mask: 0x%x Mark value: 0x%x\n", sp->mark.m, sp->mark.v);
nl_dump(p, "\n");
}
static void xfrm_sp_dump_details(struct nl_object *a, struct nl_dump_params *p)
{
xfrm_sp_dump_line(a, p);
}
static void xfrm_sp_dump_stats(struct nl_object *a, struct nl_dump_params *p)
{
xfrm_sp_dump_details(a, p);
return;
}
/**
* @name XFRM SP Object Allocation/Freeage
* @{
*/
struct xfrmnl_sp* xfrmnl_sp_alloc(void)
{
return (struct xfrmnl_sp*) nl_object_alloc(&xfrm_sp_obj_ops);
}
void xfrmnl_sp_put(struct xfrmnl_sp* sp)
{
nl_object_put((struct nl_object *) sp);
}
/** @} */
/**
* @name SP Cache Managament
* @{
*/
/**
* Build a SP cache including all SPs currently configured in the kernel.
* @arg sock Netlink socket.
* @arg result Pointer to store resulting cache.
*
* Allocates a new SP cache, initializes it properly and updates it
* to include all SPs currently configured in the kernel.
*
* @return 0 on success or a negative error code.
*/
int xfrmnl_sp_alloc_cache(struct nl_sock *sock, struct nl_cache **result)
{
return nl_cache_alloc_and_fill(&xfrmnl_sp_ops, sock, result);
}
/**
* Look up a SP by policy id and direction
* @arg cache SP cache
* @arg index Policy Id
* @arg dir direction
* @return sp handle or NULL if no match was found.
*/
struct xfrmnl_sp* xfrmnl_sp_get(struct nl_cache* cache, unsigned int index, unsigned int dir)
{
struct xfrmnl_sp *sp;
//nl_list_for_each_entry(sp, &cache->c_items, ce_list) {
for (sp = (struct xfrmnl_sp*)nl_cache_get_first (cache);
sp != NULL;
sp = (struct xfrmnl_sp*)nl_cache_get_next ((struct nl_object*)sp))
{
if (sp->index == index && sp->dir == dir)
{
nl_object_get((struct nl_object *) sp);
return sp;
}
}
return NULL;
}
/** @} */
static struct nla_policy xfrm_sp_policy[XFRMA_MAX+1] = {
[XFRMA_POLICY] = { .minlen = sizeof(struct xfrm_userpolicy_info)},
[XFRMA_SEC_CTX] = { .minlen = sizeof(struct xfrm_sec_ctx) },
[XFRMA_TMPL] = { .minlen = sizeof(struct xfrm_user_tmpl) },
[XFRMA_POLICY_TYPE] = { .minlen = sizeof(struct xfrm_userpolicy_type)},
[XFRMA_MARK] = { .minlen = sizeof(struct xfrm_mark) },
};
static int xfrm_sp_request_update(struct nl_cache *c, struct nl_sock *h)
{
return nl_send_simple (h, XFRM_MSG_GETPOLICY, NLM_F_DUMP, NULL, 0);
}
int xfrmnl_sp_parse(struct nlmsghdr *n, struct xfrmnl_sp **result)
{
struct xfrmnl_sp *sp;
struct nlattr *tb[XFRMA_MAX + 1];
struct xfrm_userpolicy_info *sp_info;
int len, err;
struct nl_addr* addr;
sp = xfrmnl_sp_alloc();
if (!sp) {
err = -NLE_NOMEM;
goto errout;
}
sp->ce_msgtype = n->nlmsg_type;
if (n->nlmsg_type == XFRM_MSG_DELPOLICY)
{
sp_info = (struct xfrm_userpolicy_info*)((char *)nlmsg_data(n) + sizeof (struct xfrm_userpolicy_id) + NLA_HDRLEN);
}
else
{
sp_info = nlmsg_data(n);
}
err = nlmsg_parse(n, sizeof(struct xfrm_userpolicy_info), tb, XFRMA_MAX, xfrm_sp_policy);
if (err < 0)
{
printf ("parse error: %d \n", err);
goto errout;
}
if (sp_info->sel.family == AF_INET)
addr = nl_addr_build (sp_info->sel.family, &sp_info->sel.daddr.a4, sizeof (sp_info->sel.daddr.a4));
else
addr = nl_addr_build (sp_info->sel.family, &sp_info->sel.daddr.a6, sizeof (sp_info->sel.daddr.a6));
nl_addr_set_prefixlen (addr, sp_info->sel.prefixlen_d);
xfrmnl_sel_set_daddr (sp->sel, addr);
/* Drop the reference count from the above set operation */
nl_addr_put(addr);
xfrmnl_sel_set_prefixlen_d (sp->sel, sp_info->sel.prefixlen_d);
if (sp_info->sel.family == AF_INET)
addr = nl_addr_build (sp_info->sel.family, &sp_info->sel.saddr.a4, sizeof (sp_info->sel.saddr.a4));
else
addr = nl_addr_build (sp_info->sel.family, &sp_info->sel.saddr.a6, sizeof (sp_info->sel.saddr.a6));
nl_addr_set_prefixlen (addr, sp_info->sel.prefixlen_s);
xfrmnl_sel_set_saddr (sp->sel, addr);
/* Drop the reference count from the above set operation */
nl_addr_put(addr);
xfrmnl_sel_set_prefixlen_s (sp->sel, sp_info->sel.prefixlen_s);
xfrmnl_sel_set_dport (sp->sel, ntohs (sp_info->sel.dport));
xfrmnl_sel_set_dportmask (sp->sel, ntohs (sp_info->sel.dport_mask));
xfrmnl_sel_set_sport (sp->sel, ntohs (sp_info->sel.sport));
xfrmnl_sel_set_sportmask (sp->sel, ntohs (sp_info->sel.sport_mask));
xfrmnl_sel_set_family (sp->sel, sp_info->sel.family);
xfrmnl_sel_set_proto (sp->sel, sp_info->sel.proto);
xfrmnl_sel_set_ifindex (sp->sel, sp_info->sel.ifindex);
xfrmnl_sel_set_userid (sp->sel, sp_info->sel.user);
sp->ce_mask |= XFRM_SP_ATTR_SEL;
sp->lft->soft_byte_limit = sp_info->lft.soft_byte_limit;
sp->lft->hard_byte_limit = sp_info->lft.hard_byte_limit;
sp->lft->soft_packet_limit = sp_info->lft.soft_packet_limit;
sp->lft->hard_packet_limit = sp_info->lft.hard_packet_limit;
sp->lft->soft_add_expires_seconds = sp_info->lft.soft_add_expires_seconds;
sp->lft->hard_add_expires_seconds = sp_info->lft.hard_add_expires_seconds;
sp->lft->soft_use_expires_seconds = sp_info->lft.soft_use_expires_seconds;
sp->lft->hard_use_expires_seconds = sp_info->lft.hard_use_expires_seconds;
sp->ce_mask |= XFRM_SP_ATTR_LTIME_CFG;
sp->curlft.bytes = sp_info->curlft.bytes;
sp->curlft.packets = sp_info->curlft.packets;
sp->curlft.add_time = sp_info->curlft.add_time;
sp->curlft.use_time = sp_info->curlft.use_time;
sp->ce_mask |= XFRM_SP_ATTR_LTIME_CUR;
sp->priority = sp_info->priority;
sp->index = sp_info->index;
sp->dir = sp_info->dir;
sp->action = sp_info->action;
sp->flags = sp_info->flags;
sp->share = sp_info->share;
sp->ce_mask |= (XFRM_SP_ATTR_PRIO | XFRM_SP_ATTR_INDEX |
XFRM_SP_ATTR_DIR | XFRM_SP_ATTR_ACTION |
XFRM_SP_ATTR_FLAGS | XFRM_SP_ATTR_SHARE);
if (tb[XFRMA_SEC_CTX]) {
struct xfrm_user_sec_ctx* ctx = nla_data(tb[XFRMA_SEC_CTX]);
len = sizeof (struct xfrmnl_user_sec_ctx) + ctx->ctx_len;
if ((sp->sec_ctx = calloc (1, len)) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
memcpy ((void *)sp->sec_ctx, (void *)ctx, len);
sp->ce_mask |= XFRM_SP_ATTR_SECCTX;
}
if (tb[XFRMA_POLICY_TYPE]) {
struct xfrm_userpolicy_type* up = nla_data(tb[XFRMA_POLICY_TYPE]);
memcpy ((void *)&sp->uptype, (void *)up, sizeof (struct xfrm_userpolicy_type));
sp->ce_mask |= XFRM_SP_ATTR_POLTYPE;
}
if (tb[XFRMA_TMPL]) {
struct xfrm_user_tmpl* tmpl = nla_data(tb[XFRMA_TMPL]);
struct xfrmnl_user_tmpl* sputmpl;
uint32_t i;
uint32_t num_tmpls = nla_len(tb[XFRMA_TMPL]) / sizeof (*tmpl);
struct nl_addr* addr;
for (i = 0; (i < num_tmpls) && (tmpl); i ++, tmpl++)
{
if ((sputmpl = xfrmnl_user_tmpl_alloc ()) == NULL)
{
err = -NLE_NOMEM;
goto errout;
}
if (tmpl->family == AF_INET)
addr = nl_addr_build(tmpl->family, &tmpl->id.daddr.a4, sizeof (tmpl->id.daddr.a4));
else
addr = nl_addr_build(tmpl->family, &tmpl->id.daddr.a6, sizeof (tmpl->id.daddr.a6));
xfrmnl_user_tmpl_set_daddr (sputmpl, addr);
/* Drop the reference count from the above set operation */
nl_addr_put(addr);
xfrmnl_user_tmpl_set_spi (sputmpl, ntohl(tmpl->id.spi));
xfrmnl_user_tmpl_set_proto (sputmpl, tmpl->id.proto);
xfrmnl_user_tmpl_set_family (sputmpl, tmpl->family);
if (tmpl->family == AF_INET)
addr = nl_addr_build(tmpl->family, &tmpl->saddr.a4, sizeof (tmpl->saddr.a4));
else
addr = nl_addr_build(tmpl->family, &tmpl->saddr.a6, sizeof (tmpl->saddr.a6));
xfrmnl_user_tmpl_set_saddr (sputmpl, addr);
/* Drop the reference count from the above set operation */
nl_addr_put(addr);
xfrmnl_user_tmpl_set_reqid (sputmpl, tmpl->reqid);
xfrmnl_user_tmpl_set_mode (sputmpl, tmpl->mode);
xfrmnl_user_tmpl_set_share (sputmpl, tmpl->share);
xfrmnl_user_tmpl_set_optional (sputmpl, tmpl->optional);
xfrmnl_user_tmpl_set_aalgos (sputmpl, tmpl->aalgos);
xfrmnl_user_tmpl_set_ealgos (sputmpl, tmpl->ealgos);
xfrmnl_user_tmpl_set_calgos (sputmpl, tmpl->calgos);
xfrmnl_sp_add_usertemplate (sp, sputmpl);
sp->ce_mask |= XFRM_SP_ATTR_TMPL;
}
}
if (tb[XFRMA_MARK]) {
struct xfrm_mark* m = nla_data(tb[XFRMA_MARK]);
sp->mark.m = m->m;
sp->mark.v = m->v;
sp->ce_mask |= XFRM_SP_ATTR_MARK;
}
*result = sp;
return 0;
errout:
xfrmnl_sp_put(sp);
return err;
}
static int xfrm_sp_msg_parser(struct nl_cache_ops *ops, struct sockaddr_nl *who,
struct nlmsghdr *n, struct nl_parser_param *pp)
{
struct xfrmnl_sp* sp;
int err;
if ((err = xfrmnl_sp_parse(n, &sp)) < 0)
{
printf ("received error: %d \n", err);
return err;
}
err = pp->pp_cb((struct nl_object *) sp, pp);
xfrmnl_sp_put(sp);
return err;
}
/**
* @name XFRM SP Get
* @{
*/
int xfrmnl_sp_build_get_request(unsigned int index, unsigned int dir, unsigned int mark_v, unsigned int mark_m, struct nl_msg **result)
{
struct nl_msg *msg;
struct xfrm_userpolicy_id spid;
struct xfrm_mark mark;
memset(&spid, 0, sizeof(spid));
spid.index = index;
spid.dir = dir;
if (!(msg = nlmsg_alloc_simple(XFRM_MSG_GETPOLICY, 0)))
return -NLE_NOMEM;
if (nlmsg_append(msg, &spid, sizeof(spid), NLMSG_ALIGNTO) < 0)
goto nla_put_failure;
if ((mark_m & mark_v) != 0)
{
memset(&mark, 0, sizeof(struct xfrm_mark));
mark.m = mark_m;
mark.v = mark_v;
NLA_PUT (msg, XFRMA_MARK, sizeof (struct xfrm_mark), &mark);
}
*result = msg;
return 0;
nla_put_failure:
nlmsg_free(msg);
return -NLE_MSGSIZE;
}
int xfrmnl_sp_get_kernel(struct nl_sock* sock, unsigned int index, unsigned int dir, unsigned int mark_v, unsigned int mark_m, struct xfrmnl_sp** result)
{
struct nl_msg *msg = NULL;
struct nl_object *obj;
int err;
if ((err = xfrmnl_sp_build_get_request(index, dir, mark_m, mark_v, &msg)) < 0)
return err;
err = nl_send_auto(sock, msg);
nlmsg_free(msg);
if (err < 0)
return err;
if ((err = nl_pickup(sock, &xfrm_sp_msg_parser, &obj)) < 0)
return err;
/* We have used xfrm_sp_msg_parser(), object is definitely a xfrm ae */
*result = (struct xfrmnl_sp *) obj;
/* If an object has been returned, we also need to wait for the ACK */
if (err == 0 && obj)
nl_wait_for_ack(sock);
return 0;
}
/** @} */
static int build_xfrm_sp_message(struct xfrmnl_sp *tmpl, int cmd, int flags, struct nl_msg **result)
{
struct nl_msg* msg;
struct xfrm_userpolicy_info sp_info;
uint32_t len;
struct nl_addr* addr;
if (!(tmpl->ce_mask & XFRM_SP_ATTR_DIR) ||
(!(tmpl->ce_mask & XFRM_SP_ATTR_INDEX) &&
!(tmpl->ce_mask & XFRM_SP_ATTR_SEL)))
return -NLE_MISSING_ATTR;
memset ((void*)&sp_info, 0, sizeof (sp_info));
if (tmpl->ce_mask & XFRM_SP_ATTR_SEL)
{
addr = xfrmnl_sel_get_daddr (tmpl->sel);
memcpy ((void*)&sp_info.sel.daddr, (void*)nl_addr_get_binary_addr (addr), sizeof (uint8_t) * nl_addr_get_len (addr));
addr = xfrmnl_sel_get_saddr (tmpl->sel);
memcpy ((void*)&sp_info.sel.saddr, (void*)nl_addr_get_binary_addr (addr), sizeof (uint8_t) * nl_addr_get_len (addr));
sp_info.sel.dport = htons (xfrmnl_sel_get_dport (tmpl->sel));
sp_info.sel.dport_mask = htons (xfrmnl_sel_get_dportmask (tmpl->sel));
sp_info.sel.sport = htons (xfrmnl_sel_get_sport (tmpl->sel));
sp_info.sel.sport_mask = htons (xfrmnl_sel_get_sportmask (tmpl->sel));
sp_info.sel.family = xfrmnl_sel_get_family (tmpl->sel);
sp_info.sel.prefixlen_d = xfrmnl_sel_get_prefixlen_d (tmpl->sel);
sp_info.sel.prefixlen_s = xfrmnl_sel_get_prefixlen_s (tmpl->sel);
sp_info.sel.proto = xfrmnl_sel_get_proto (tmpl->sel);
sp_info.sel.ifindex = xfrmnl_sel_get_ifindex (tmpl->sel);
sp_info.sel.user = xfrmnl_sel_get_userid (tmpl->sel);
}
if (tmpl->ce_mask & XFRM_SP_ATTR_LTIME_CFG)
{
sp_info.lft.soft_byte_limit = xfrmnl_ltime_cfg_get_soft_bytelimit (tmpl->lft);
sp_info.lft.hard_byte_limit = xfrmnl_ltime_cfg_get_hard_bytelimit (tmpl->lft);
sp_info.lft.soft_packet_limit = xfrmnl_ltime_cfg_get_soft_packetlimit (tmpl->lft);
sp_info.lft.hard_packet_limit = xfrmnl_ltime_cfg_get_hard_packetlimit (tmpl->lft);
sp_info.lft.soft_add_expires_seconds = xfrmnl_ltime_cfg_get_soft_addexpires (tmpl->lft);
sp_info.lft.hard_add_expires_seconds = xfrmnl_ltime_cfg_get_hard_addexpires (tmpl->lft);
sp_info.lft.soft_use_expires_seconds = xfrmnl_ltime_cfg_get_soft_useexpires (tmpl->lft);
sp_info.lft.hard_use_expires_seconds = xfrmnl_ltime_cfg_get_hard_useexpires (tmpl->lft);
}
//Skip current lifetime: cur lifetime can be updated only via AE
if (tmpl->ce_mask & XFRM_SP_ATTR_PRIO)
sp_info.priority = tmpl->priority;
if (tmpl->ce_mask & XFRM_SP_ATTR_INDEX)
sp_info.index = tmpl->index;
if (tmpl->ce_mask & XFRM_SP_ATTR_DIR)
sp_info.dir = tmpl->dir;
if (tmpl->ce_mask & XFRM_SP_ATTR_ACTION)
sp_info.action = tmpl->action;
if (tmpl->ce_mask & XFRM_SP_ATTR_FLAGS)
sp_info.flags = tmpl->flags;
if (tmpl->ce_mask & XFRM_SP_ATTR_SHARE)
sp_info.share = tmpl->share;
msg = nlmsg_alloc_simple(cmd, flags);
if (!msg)
return -NLE_NOMEM;
if (nlmsg_append(msg, &sp_info, sizeof(sp_info), NLMSG_ALIGNTO) < 0)
goto nla_put_failure;
if (tmpl->ce_mask & XFRM_SP_ATTR_SECCTX) {
len = (sizeof (struct xfrm_user_sec_ctx)) + tmpl->sec_ctx->ctx_len;
NLA_PUT (msg, XFRMA_SEC_CTX, len, tmpl->sec_ctx);
}
if (tmpl->ce_mask & XFRM_SP_ATTR_POLTYPE) {
len = sizeof (struct xfrm_userpolicy_type);
NLA_PUT (msg, XFRMA_POLICY_TYPE, len, &tmpl->uptype);
}
if (tmpl->ce_mask & XFRM_SP_ATTR_TMPL) {
struct nlattr* tmpls;
struct xfrmnl_user_tmpl* utmpl;
struct nl_addr* addr;
if (!(tmpls = nla_nest_start(msg, XFRMA_TMPL)))
goto nla_put_failure;
nl_list_for_each_entry(utmpl, &tmpl->usertmpl_list, utmpl_list) {
struct xfrm_user_tmpl* tmpl;
tmpl = nlmsg_reserve(msg, sizeof(*tmpl), NLMSG_ALIGNTO);
if (!tmpl)
goto nla_put_failure;
addr = xfrmnl_user_tmpl_get_daddr (utmpl);
memcpy ((void *)&tmpl->id.daddr, nl_addr_get_binary_addr (addr),
nl_addr_get_len (addr));
tmpl->id.spi = htonl(xfrmnl_user_tmpl_get_spi (utmpl));
tmpl->id.proto = xfrmnl_user_tmpl_get_proto (utmpl);
tmpl->family = xfrmnl_user_tmpl_get_family (utmpl);
addr = xfrmnl_user_tmpl_get_saddr (utmpl);
memcpy ((void *)&tmpl->saddr, nl_addr_get_binary_addr (addr),
nl_addr_get_len (addr));
tmpl->reqid = xfrmnl_user_tmpl_get_reqid (utmpl);
tmpl->mode = xfrmnl_user_tmpl_get_mode (utmpl);
tmpl->share = xfrmnl_user_tmpl_get_share (utmpl);
tmpl->optional = xfrmnl_user_tmpl_get_optional (utmpl);
tmpl->aalgos = xfrmnl_user_tmpl_get_aalgos (utmpl);
tmpl->ealgos = xfrmnl_user_tmpl_get_ealgos (utmpl);
tmpl->calgos = xfrmnl_user_tmpl_get_calgos (utmpl);
}
nla_nest_end(msg, tmpls);
}
if (tmpl->ce_mask & XFRM_SP_ATTR_MARK) {
NLA_PUT (msg, XFRMA_MARK, sizeof (struct xfrm_mark), &tmpl->mark);
}
*result = msg;
return 0;
nla_put_failure:
nlmsg_free(msg);
return -NLE_MSGSIZE;
}
/**
* @name XFRM SP Add
* @{
*/
int xfrmnl_sp_build_add_request(struct xfrmnl_sp* tmpl, int flags, struct nl_msg **result)
{
return build_xfrm_sp_message (tmpl, XFRM_MSG_NEWPOLICY, flags, result);
}
int xfrmnl_sp_add(struct nl_sock* sk, struct xfrmnl_sp* tmpl, int flags)
{
int err;
struct nl_msg *msg;
if ((err = xfrmnl_sp_build_add_request(tmpl, flags, &msg)) < 0)
return err;
err = nl_send_auto_complete(sk, msg);
nlmsg_free(msg);
if (err < 0)
return err;
return nl_wait_for_ack(sk);
}
/**
* @name XFRM SP Update
* @{
*/
int xfrmnl_sp_build_update_request(struct xfrmnl_sp* tmpl, int flags, struct nl_msg **result)
{
return build_xfrm_sp_message (tmpl, XFRM_MSG_UPDPOLICY, flags, result);
}
int xfrmnl_sp_update(struct nl_sock* sk, struct xfrmnl_sp* tmpl, int flags)
{
int err;
struct nl_msg *msg;
if ((err = xfrmnl_sp_build_update_request(tmpl, flags, &msg)) < 0)
return err;
err = nl_send_auto_complete(sk, msg);
nlmsg_free(msg);
if (err < 0)
return err;
return nl_wait_for_ack(sk);
}
/** @} */
/**
* \brief Builds a xfrm_sp_delete_message. Uses either index and direction
* or security-context (not set is a valid value), selector and
* direction for identification.
* Returns error if necessary values aren't set.
*
* \param tmpl The policy template.