--- /dev/null
+/*
+ * NetLabel CIPSO/IPv4 Support
+ *
+ * This file defines the CIPSO/IPv4 functions for the NetLabel system. The
+ * NetLabel system manages static and dynamic label mappings for network
+ * protocols such as CIPSO and RIPSO.
+ *
+ * Author: Paul Moore <paul.moore@hp.com>
+ *
+ */
+
+/*
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/string.h>
+#include <linux/skbuff.h>
+#include <linux/audit.h>
+#include <net/sock.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <net/netlabel.h>
+#include <net/cipso_ipv4.h>
+
+#include "netlabel_user.h"
+#include "netlabel_cipso_v4.h"
+
+/* Argument struct for cipso_v4_doi_walk() */
+struct netlbl_cipsov4_doiwalk_arg {
+ struct netlink_callback *nl_cb;
+ struct sk_buff *skb;
+ u32 seq;
+};
+
+/* NetLabel Generic NETLINK CIPSOv4 family */
+static struct genl_family netlbl_cipsov4_gnl_family = {
+ .id = GENL_ID_GENERATE,
+ .hdrsize = 0,
+ .name = NETLBL_NLTYPE_CIPSOV4_NAME,
+ .version = NETLBL_PROTO_VERSION,
+ .maxattr = NLBL_CIPSOV4_A_MAX,
+};
+
+/* NetLabel Netlink attribute policy */
+static struct nla_policy netlbl_cipsov4_genl_policy[NLBL_CIPSOV4_A_MAX + 1] = {
+ [NLBL_CIPSOV4_A_DOI] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MTYPE] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_TAG] = { .type = NLA_U8 },
+ [NLBL_CIPSOV4_A_TAGLST] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSLVLLOC] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSLVLREM] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSLVL] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSLVLLST] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSCATLOC] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSCATREM] = { .type = NLA_U32 },
+ [NLBL_CIPSOV4_A_MLSCAT] = { .type = NLA_NESTED },
+ [NLBL_CIPSOV4_A_MLSCATLST] = { .type = NLA_NESTED },
+};
+
+/*
+ * Helper Functions
+ */
+
+/**
+ * netlbl_cipsov4_doi_free - Frees a CIPSO V4 DOI definition
+ * @entry: the entry's RCU field
+ *
+ * Description:
+ * This function is designed to be used as a callback to the call_rcu()
+ * function so that the memory allocated to the DOI definition can be released
+ * safely.
+ *
+ */
+static void netlbl_cipsov4_doi_free(struct rcu_head *entry)
+{
+ struct cipso_v4_doi *ptr;
+
+ ptr = container_of(entry, struct cipso_v4_doi, rcu);
+ switch (ptr->type) {
+ case CIPSO_V4_MAP_STD:
+ kfree(ptr->map.std->lvl.cipso);
+ kfree(ptr->map.std->lvl.local);
+ kfree(ptr->map.std->cat.cipso);
+ kfree(ptr->map.std->cat.local);
+ break;
+ }
+ kfree(ptr);
+}
+
+/**
+ * netlbl_cipsov4_add_common - Parse the common sections of a ADD message
+ * @info: the Generic NETLINK info block
+ * @doi_def: the CIPSO V4 DOI definition
+ *
+ * Description:
+ * Parse the common sections of a ADD message and fill in the related values
+ * in @doi_def. Returns zero on success, negative values on failure.
+ *
+ */
+static int netlbl_cipsov4_add_common(struct genl_info *info,
+ struct cipso_v4_doi *doi_def)
+{
+ struct nlattr *nla;
+ int nla_rem;
+ u32 iter = 0;
+
+ doi_def->doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+
+ if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_TAGLST],
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ return -EINVAL;
+
+ nla_for_each_nested(nla, info->attrs[NLBL_CIPSOV4_A_TAGLST], nla_rem)
+ if (nla->nla_type == NLBL_CIPSOV4_A_TAG) {
+ if (iter >= CIPSO_V4_TAG_MAXCNT)
+ return -EINVAL;
+ doi_def->tags[iter++] = nla_get_u8(nla);
+ }
+ while (iter < CIPSO_V4_TAG_MAXCNT)
+ doi_def->tags[iter++] = CIPSO_V4_TAG_INVALID;
+
+ return 0;
+}
+
+/*
+ * NetLabel Command Handlers
+ */
+
+/**
+ * netlbl_cipsov4_add_std - Adds a CIPSO V4 DOI definition
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Create a new CIPSO_V4_MAP_STD DOI definition based on the given ADD message
+ * and add it to the CIPSO V4 engine. Return zero on success and non-zero on
+ * error.
+ *
+ */
+static int netlbl_cipsov4_add_std(struct genl_info *info)
+{
+ int ret_val = -EINVAL;
+ struct cipso_v4_doi *doi_def = NULL;
+ struct nlattr *nla_a;
+ struct nlattr *nla_b;
+ int nla_a_rem;
+ int nla_b_rem;
+ u32 iter;
+
+ if (!info->attrs[NLBL_CIPSOV4_A_TAGLST] ||
+ !info->attrs[NLBL_CIPSOV4_A_MLSLVLLST])
+ return -EINVAL;
+
+ if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ return -EINVAL;
+
+ doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
+ if (doi_def == NULL)
+ return -ENOMEM;
+ doi_def->map.std = kzalloc(sizeof(*doi_def->map.std), GFP_KERNEL);
+ if (doi_def->map.std == NULL) {
+ ret_val = -ENOMEM;
+ goto add_std_failure;
+ }
+ doi_def->type = CIPSO_V4_MAP_STD;
+
+ ret_val = netlbl_cipsov4_add_common(info, doi_def);
+ if (ret_val != 0)
+ goto add_std_failure;
+ ret_val = -EINVAL;
+
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSLVL) {
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
+ nla_for_each_nested(nla_b, nla_a, nla_b_rem)
+ switch (nla_b->nla_type) {
+ case NLBL_CIPSOV4_A_MLSLVLLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_LVLS)
+ goto add_std_failure;
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->lvl.local_size)
+ doi_def->map.std->lvl.local_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ case NLBL_CIPSOV4_A_MLSLVLREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_LVLS)
+ goto add_std_failure;
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->lvl.cipso_size)
+ doi_def->map.std->lvl.cipso_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ }
+ }
+ doi_def->map.std->lvl.local = kcalloc(doi_def->map.std->lvl.local_size,
+ sizeof(u32),
+ GFP_KERNEL);
+ if (doi_def->map.std->lvl.local == NULL) {
+ ret_val = -ENOMEM;
+ goto add_std_failure;
+ }
+ doi_def->map.std->lvl.cipso = kcalloc(doi_def->map.std->lvl.cipso_size,
+ sizeof(u32),
+ GFP_KERNEL);
+ if (doi_def->map.std->lvl.cipso == NULL) {
+ ret_val = -ENOMEM;
+ goto add_std_failure;
+ }
+ for (iter = 0; iter < doi_def->map.std->lvl.local_size; iter++)
+ doi_def->map.std->lvl.local[iter] = CIPSO_V4_INV_LVL;
+ for (iter = 0; iter < doi_def->map.std->lvl.cipso_size; iter++)
+ doi_def->map.std->lvl.cipso[iter] = CIPSO_V4_INV_LVL;
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSLVLLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSLVL) {
+ struct nlattr *lvl_loc;
+ struct nlattr *lvl_rem;
+
+ lvl_loc = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSLVLLOC);
+ lvl_rem = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSLVLREM);
+ if (lvl_loc == NULL || lvl_rem == NULL)
+ goto add_std_failure;
+ doi_def->map.std->lvl.local[nla_get_u32(lvl_loc)] =
+ nla_get_u32(lvl_rem);
+ doi_def->map.std->lvl.cipso[nla_get_u32(lvl_rem)] =
+ nla_get_u32(lvl_loc);
+ }
+
+ if (info->attrs[NLBL_CIPSOV4_A_MLSCATLST]) {
+ if (nla_validate_nested(info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
+
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSCAT) {
+ if (nla_validate_nested(nla_a,
+ NLBL_CIPSOV4_A_MAX,
+ netlbl_cipsov4_genl_policy) != 0)
+ goto add_std_failure;
+ nla_for_each_nested(nla_b, nla_a, nla_b_rem)
+ switch (nla_b->nla_type) {
+ case NLBL_CIPSOV4_A_MLSCATLOC:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_LOC_CATS)
+ goto add_std_failure;
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->cat.local_size)
+ doi_def->map.std->cat.local_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ case NLBL_CIPSOV4_A_MLSCATREM:
+ if (nla_get_u32(nla_b) >
+ CIPSO_V4_MAX_REM_CATS)
+ goto add_std_failure;
+ if (nla_get_u32(nla_b) >=
+ doi_def->map.std->cat.cipso_size)
+ doi_def->map.std->cat.cipso_size =
+ nla_get_u32(nla_b) + 1;
+ break;
+ }
+ }
+ doi_def->map.std->cat.local = kcalloc(
+ doi_def->map.std->cat.local_size,
+ sizeof(u32),
+ GFP_KERNEL);
+ if (doi_def->map.std->cat.local == NULL) {
+ ret_val = -ENOMEM;
+ goto add_std_failure;
+ }
+ doi_def->map.std->cat.cipso = kcalloc(
+ doi_def->map.std->cat.cipso_size,
+ sizeof(u32),
+ GFP_KERNEL);
+ if (doi_def->map.std->cat.cipso == NULL) {
+ ret_val = -ENOMEM;
+ goto add_std_failure;
+ }
+ for (iter = 0; iter < doi_def->map.std->cat.local_size; iter++)
+ doi_def->map.std->cat.local[iter] = CIPSO_V4_INV_CAT;
+ for (iter = 0; iter < doi_def->map.std->cat.cipso_size; iter++)
+ doi_def->map.std->cat.cipso[iter] = CIPSO_V4_INV_CAT;
+ nla_for_each_nested(nla_a,
+ info->attrs[NLBL_CIPSOV4_A_MLSCATLST],
+ nla_a_rem)
+ if (nla_a->nla_type == NLBL_CIPSOV4_A_MLSCAT) {
+ struct nlattr *cat_loc;
+ struct nlattr *cat_rem;
+
+ cat_loc = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSCATLOC);
+ cat_rem = nla_find_nested(nla_a,
+ NLBL_CIPSOV4_A_MLSCATREM);
+ if (cat_loc == NULL || cat_rem == NULL)
+ goto add_std_failure;
+ doi_def->map.std->cat.local[
+ nla_get_u32(cat_loc)] =
+ nla_get_u32(cat_rem);
+ doi_def->map.std->cat.cipso[
+ nla_get_u32(cat_rem)] =
+ nla_get_u32(cat_loc);
+ }
+ }
+
+ ret_val = cipso_v4_doi_add(doi_def);
+ if (ret_val != 0)
+ goto add_std_failure;
+ return 0;
+
+add_std_failure:
+ if (doi_def)
+ netlbl_cipsov4_doi_free(&doi_def->rcu);
+ return ret_val;
+}
+
+/**
+ * netlbl_cipsov4_add_pass - Adds a CIPSO V4 DOI definition
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Create a new CIPSO_V4_MAP_PASS DOI definition based on the given ADD message
+ * and add it to the CIPSO V4 engine. Return zero on success and non-zero on
+ * error.
+ *
+ */
+static int netlbl_cipsov4_add_pass(struct genl_info *info)
+{
+ int ret_val;
+ struct cipso_v4_doi *doi_def = NULL;
+
+ if (!info->attrs[NLBL_CIPSOV4_A_TAGLST])
+ return -EINVAL;
+
+ doi_def = kmalloc(sizeof(*doi_def), GFP_KERNEL);
+ if (doi_def == NULL)
+ return -ENOMEM;
+ doi_def->type = CIPSO_V4_MAP_PASS;
+
+ ret_val = netlbl_cipsov4_add_common(info, doi_def);
+ if (ret_val != 0)
+ goto add_pass_failure;
+
+ ret_val = cipso_v4_doi_add(doi_def);
+ if (ret_val != 0)
+ goto add_pass_failure;
+ return 0;
+
+add_pass_failure:
+ netlbl_cipsov4_doi_free(&doi_def->rcu);
+ return ret_val;
+}
+
+/**
+ * netlbl_cipsov4_add - Handle an ADD message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Create a new DOI definition based on the given ADD message and add it to the
+ * CIPSO V4 engine. Returns zero on success, negative values on failure.
+ *
+ */
+static int netlbl_cipsov4_add(struct sk_buff *skb, struct genl_info *info)
+
+{
+ int ret_val = -EINVAL;
+ u32 type;
+ u32 doi;
+ const char *type_str = "(unknown)";
+ struct audit_buffer *audit_buf;
+ struct netlbl_audit audit_info;
+
+ if (!info->attrs[NLBL_CIPSOV4_A_DOI] ||
+ !info->attrs[NLBL_CIPSOV4_A_MTYPE])
+ return -EINVAL;
+
+ doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+ netlbl_netlink_auditinfo(skb, &audit_info);
+
+ type = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_MTYPE]);
+ switch (type) {
+ case CIPSO_V4_MAP_STD:
+ type_str = "std";
+ ret_val = netlbl_cipsov4_add_std(info);
+ break;
+ case CIPSO_V4_MAP_PASS:
+ type_str = "pass";
+ ret_val = netlbl_cipsov4_add_pass(info);
+ break;
+ }
+
+ audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_ADD,
+ &audit_info);
+ if (audit_buf != NULL) {
+ audit_log_format(audit_buf,
+ " cipso_doi=%u cipso_type=%s res=%u",
+ doi,
+ type_str,
+ ret_val == 0 ? 1 : 0);
+ audit_log_end(audit_buf);
+ }
+
+ return ret_val;
+}
+
+/**
+ * netlbl_cipsov4_list - Handle a LIST message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated LIST message and respond accordingly. While the
+ * response message generated by the kernel is straightforward, determining
+ * before hand the size of the buffer to allocate is not (we have to generate
+ * the message to know the size). In order to keep this function sane what we
+ * do is allocate a buffer of NLMSG_GOODSIZE and try to fit the response in
+ * that size, if we fail then we restart with a larger buffer and try again.
+ * We continue in this manner until we hit a limit of failed attempts then we
+ * give up and just send an error message. Returns zero on success and
+ * negative values on error.
+ *
+ */
+static int netlbl_cipsov4_list(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val;
+ struct sk_buff *ans_skb = NULL;
+ u32 nlsze_mult = 1;
+ void *data;
+ u32 doi;
+ struct nlattr *nla_a;
+ struct nlattr *nla_b;
+ struct cipso_v4_doi *doi_def;
+ u32 iter;
+
+ if (!info->attrs[NLBL_CIPSOV4_A_DOI]) {
+ ret_val = -EINVAL;
+ goto list_failure;
+ }
+
+list_start:
+ ans_skb = nlmsg_new(NLMSG_DEFAULT_SIZE * nlsze_mult, GFP_KERNEL);
+ if (ans_skb == NULL) {
+ ret_val = -ENOMEM;
+ goto list_failure;
+ }
+ data = genlmsg_put_reply(ans_skb, info, &netlbl_cipsov4_gnl_family,
+ 0, NLBL_CIPSOV4_C_LIST);
+ if (data == NULL) {
+ ret_val = -ENOMEM;
+ goto list_failure;
+ }
+
+ doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+
+ rcu_read_lock();
+ doi_def = cipso_v4_doi_getdef(doi);
+ if (doi_def == NULL) {
+ ret_val = -EINVAL;
+ goto list_failure;
+ }
+
+ ret_val = nla_put_u32(ans_skb, NLBL_CIPSOV4_A_MTYPE, doi_def->type);
+ if (ret_val != 0)
+ goto list_failure_lock;
+
+ nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_TAGLST);
+ if (nla_a == NULL) {
+ ret_val = -ENOMEM;
+ goto list_failure_lock;
+ }
+ for (iter = 0;
+ iter < CIPSO_V4_TAG_MAXCNT &&
+ doi_def->tags[iter] != CIPSO_V4_TAG_INVALID;
+ iter++) {
+ ret_val = nla_put_u8(ans_skb,
+ NLBL_CIPSOV4_A_TAG,
+ doi_def->tags[iter]);
+ if (ret_val != 0)
+ goto list_failure_lock;
+ }
+ nla_nest_end(ans_skb, nla_a);
+
+ switch (doi_def->type) {
+ case CIPSO_V4_MAP_STD:
+ nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSLVLLST);
+ if (nla_a == NULL) {
+ ret_val = -ENOMEM;
+ goto list_failure_lock;
+ }
+ for (iter = 0;
+ iter < doi_def->map.std->lvl.local_size;
+ iter++) {
+ if (doi_def->map.std->lvl.local[iter] ==
+ CIPSO_V4_INV_LVL)
+ continue;
+
+ nla_b = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSLVL);
+ if (nla_b == NULL) {
+ ret_val = -ENOMEM;
+ goto list_retry;
+ }
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSLVLLOC,
+ iter);
+ if (ret_val != 0)
+ goto list_retry;
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSLVLREM,
+ doi_def->map.std->lvl.local[iter]);
+ if (ret_val != 0)
+ goto list_retry;
+ nla_nest_end(ans_skb, nla_b);
+ }
+ nla_nest_end(ans_skb, nla_a);
+
+ nla_a = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSCATLST);
+ if (nla_a == NULL) {
+ ret_val = -ENOMEM;
+ goto list_retry;
+ }
+ for (iter = 0;
+ iter < doi_def->map.std->cat.local_size;
+ iter++) {
+ if (doi_def->map.std->cat.local[iter] ==
+ CIPSO_V4_INV_CAT)
+ continue;
+
+ nla_b = nla_nest_start(ans_skb, NLBL_CIPSOV4_A_MLSCAT);
+ if (nla_b == NULL) {
+ ret_val = -ENOMEM;
+ goto list_retry;
+ }
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSCATLOC,
+ iter);
+ if (ret_val != 0)
+ goto list_retry;
+ ret_val = nla_put_u32(ans_skb,
+ NLBL_CIPSOV4_A_MLSCATREM,
+ doi_def->map.std->cat.local[iter]);
+ if (ret_val != 0)
+ goto list_retry;
+ nla_nest_end(ans_skb, nla_b);
+ }
+ nla_nest_end(ans_skb, nla_a);
+
+ break;
+ }
+ rcu_read_unlock();
+
+ genlmsg_end(ans_skb, data);
+
+ ret_val = genlmsg_reply(ans_skb, info);
+ if (ret_val != 0)
+ goto list_failure;
+
+ return 0;
+
+list_retry:
+ /* XXX - this limit is a guesstimate */
+ if (nlsze_mult < 4) {
+ rcu_read_unlock();
+ kfree_skb(ans_skb);
+ nlsze_mult++;
+ goto list_start;
+ }
+list_failure_lock:
+ rcu_read_unlock();
+list_failure:
+ kfree_skb(ans_skb);
+ return ret_val;
+}
+
+/**
+ * netlbl_cipsov4_listall_cb - cipso_v4_doi_walk() callback for LISTALL
+ * @doi_def: the CIPSOv4 DOI definition
+ * @arg: the netlbl_cipsov4_doiwalk_arg structure
+ *
+ * Description:
+ * This function is designed to be used as a callback to the
+ * cipso_v4_doi_walk() function for use in generating a response for a LISTALL
+ * message. Returns the size of the message on success, negative values on
+ * failure.
+ *
+ */
+static int netlbl_cipsov4_listall_cb(struct cipso_v4_doi *doi_def, void *arg)
+{
+ int ret_val = -ENOMEM;
+ struct netlbl_cipsov4_doiwalk_arg *cb_arg = arg;
+ void *data;
+
+ data = genlmsg_put(cb_arg->skb, NETLINK_CB(cb_arg->nl_cb->skb).pid,
+ cb_arg->seq, &netlbl_cipsov4_gnl_family,
+ NLM_F_MULTI, NLBL_CIPSOV4_C_LISTALL);
+ if (data == NULL)
+ goto listall_cb_failure;
+
+ ret_val = nla_put_u32(cb_arg->skb, NLBL_CIPSOV4_A_DOI, doi_def->doi);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+ ret_val = nla_put_u32(cb_arg->skb,
+ NLBL_CIPSOV4_A_MTYPE,
+ doi_def->type);
+ if (ret_val != 0)
+ goto listall_cb_failure;
+
+ return genlmsg_end(cb_arg->skb, data);
+
+listall_cb_failure:
+ genlmsg_cancel(cb_arg->skb, data);
+ return ret_val;
+}
+
+/**
+ * netlbl_cipsov4_listall - Handle a LISTALL message
+ * @skb: the NETLINK buffer
+ * @cb: the NETLINK callback
+ *
+ * Description:
+ * Process a user generated LISTALL message and respond accordingly. Returns
+ * zero on success and negative values on error.
+ *
+ */
+static int netlbl_cipsov4_listall(struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct netlbl_cipsov4_doiwalk_arg cb_arg;
+ int doi_skip = cb->args[0];
+
+ cb_arg.nl_cb = cb;
+ cb_arg.skb = skb;
+ cb_arg.seq = cb->nlh->nlmsg_seq;
+
+ cipso_v4_doi_walk(&doi_skip, netlbl_cipsov4_listall_cb, &cb_arg);
+
+ cb->args[0] = doi_skip;
+ return skb->len;
+}
+
+/**
+ * netlbl_cipsov4_remove - Handle a REMOVE message
+ * @skb: the NETLINK buffer
+ * @info: the Generic NETLINK info block
+ *
+ * Description:
+ * Process a user generated REMOVE message and respond accordingly. Returns
+ * zero on success, negative values on failure.
+ *
+ */
+static int netlbl_cipsov4_remove(struct sk_buff *skb, struct genl_info *info)
+{
+ int ret_val = -EINVAL;
+ u32 doi = 0;
+ struct audit_buffer *audit_buf;
+ struct netlbl_audit audit_info;
+
+ if (!info->attrs[NLBL_CIPSOV4_A_DOI])
+ return -EINVAL;
+
+ doi = nla_get_u32(info->attrs[NLBL_CIPSOV4_A_DOI]);
+ netlbl_netlink_auditinfo(skb, &audit_info);
+
+ ret_val = cipso_v4_doi_remove(doi,
+ &audit_info,
+ netlbl_cipsov4_doi_free);
+
+ audit_buf = netlbl_audit_start_common(AUDIT_MAC_CIPSOV4_DEL,
+ &audit_info);
+ if (audit_buf != NULL) {
+ audit_log_format(audit_buf,
+ " cipso_doi=%u res=%u",
+ doi,
+ ret_val == 0 ? 1 : 0);
+ audit_log_end(audit_buf);
+ }
+
+ return ret_val;
+}
+
+/*
+ * NetLabel Generic NETLINK Command Definitions
+ */
+
+static struct genl_ops netlbl_cipsov4_genl_c_add = {
+ .cmd = NLBL_CIPSOV4_C_ADD,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_cipsov4_genl_policy,
+ .doit = netlbl_cipsov4_add,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_cipsov4_genl_c_remove = {
+ .cmd = NLBL_CIPSOV4_C_REMOVE,
+ .flags = GENL_ADMIN_PERM,
+ .policy = netlbl_cipsov4_genl_policy,
+ .doit = netlbl_cipsov4_remove,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_cipsov4_genl_c_list = {
+ .cmd = NLBL_CIPSOV4_C_LIST,
+ .flags = 0,
+ .policy = netlbl_cipsov4_genl_policy,
+ .doit = netlbl_cipsov4_list,
+ .dumpit = NULL,
+};
+
+static struct genl_ops netlbl_cipsov4_genl_c_listall = {
+ .cmd = NLBL_CIPSOV4_C_LISTALL,
+ .flags = 0,
+ .policy = netlbl_cipsov4_genl_policy,
+ .doit = NULL,
+ .dumpit = netlbl_cipsov4_listall,
+};
+
+/*
+ * NetLabel Generic NETLINK Protocol Functions
+ */
+
+/**
+ * netlbl_cipsov4_genl_init - Register the CIPSOv4 NetLabel component
+ *
+ * Description:
+ * Register the CIPSOv4 packet NetLabel component with the Generic NETLINK
+ * mechanism. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_cipsov4_genl_init(void)
+{
+ int ret_val;
+
+ ret_val = genl_register_family(&netlbl_cipsov4_gnl_family);
+ if (ret_val != 0)
+ return ret_val;
+
+ ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
+ &netlbl_cipsov4_genl_c_add);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
+ &netlbl_cipsov4_genl_c_remove);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
+ &netlbl_cipsov4_genl_c_list);
+ if (ret_val != 0)
+ return ret_val;
+ ret_val = genl_register_ops(&netlbl_cipsov4_gnl_family,
+ &netlbl_cipsov4_genl_c_listall);
+ if (ret_val != 0)
+ return ret_val;
+
+ return 0;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff