set.c
/*
* (C) 2012-2013 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* 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 code has been sponsored by Sophos Astaro <http://www.sophos.com>
*/
#include "internal.h"
#include <time.h>
#include <endian.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <netinet/in.h>
#include <limits.h>
#include <errno.h>
#include <libmnl/libmnl.h>
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nf_tables.h>
#include <libnftnl/set.h>
#include <libnftnl/expr.h>
EXPORT_SYMBOL(nftnl_set_alloc);
struct nftnl_set *nftnl_set_alloc(void)
{
struct nftnl_set *s;
s = calloc(1, sizeof(struct nftnl_set));
if (s == NULL)
return NULL;
INIT_LIST_HEAD(&s->element_list);
INIT_LIST_HEAD(&s->expr_list);
return s;
}
EXPORT_SYMBOL(nftnl_set_free);
void nftnl_set_free(const struct nftnl_set *s)
{
struct nftnl_set_elem *elem, *tmp;
struct nftnl_expr *expr, *next;
if (s->flags & (1 << NFTNL_SET_TABLE))
xfree(s->table);
if (s->flags & (1 << NFTNL_SET_NAME))
xfree(s->name);
if (s->flags & (1 << NFTNL_SET_USERDATA))
xfree(s->user.data);
list_for_each_entry_safe(expr, next, &s->expr_list, head)
nftnl_expr_free(expr);
list_for_each_entry_safe(elem, tmp, &s->element_list, head) {
list_del(&elem->head);
nftnl_set_elem_free(elem);
}
xfree(s);
}
EXPORT_SYMBOL(nftnl_set_is_set);
bool nftnl_set_is_set(const struct nftnl_set *s, uint16_t attr)
{
return s->flags & (1 << attr);
}
EXPORT_SYMBOL(nftnl_set_unset);
void nftnl_set_unset(struct nftnl_set *s, uint16_t attr)
{
struct nftnl_expr *expr, *tmp;
if (!(s->flags & (1 << attr)))
return;
switch (attr) {
case NFTNL_SET_TABLE:
xfree(s->table);
break;
case NFTNL_SET_NAME:
xfree(s->name);
break;
case NFTNL_SET_HANDLE:
case NFTNL_SET_FLAGS:
case NFTNL_SET_KEY_TYPE:
case NFTNL_SET_KEY_LEN:
case NFTNL_SET_DATA_TYPE:
case NFTNL_SET_DATA_LEN:
case NFTNL_SET_OBJ_TYPE:
case NFTNL_SET_FAMILY:
case NFTNL_SET_ID:
case NFTNL_SET_POLICY:
case NFTNL_SET_DESC_SIZE:
case NFTNL_SET_DESC_CONCAT:
case NFTNL_SET_TIMEOUT:
case NFTNL_SET_GC_INTERVAL:
break;
case NFTNL_SET_USERDATA:
xfree(s->user.data);
break;
case NFTNL_SET_EXPR:
case NFTNL_SET_EXPRESSIONS:
list_for_each_entry_safe(expr, tmp, &s->expr_list, head)
nftnl_expr_free(expr);
break;
default:
return;
}
s->flags &= ~(1 << attr);
}
static uint32_t nftnl_set_validate[NFTNL_SET_MAX + 1] = {
[NFTNL_SET_HANDLE] = sizeof(uint64_t),
[NFTNL_SET_FLAGS] = sizeof(uint32_t),
[NFTNL_SET_KEY_TYPE] = sizeof(uint32_t),
[NFTNL_SET_KEY_LEN] = sizeof(uint32_t),
[NFTNL_SET_DATA_TYPE] = sizeof(uint32_t),
[NFTNL_SET_DATA_LEN] = sizeof(uint32_t),
[NFTNL_SET_OBJ_TYPE] = sizeof(uint32_t),
[NFTNL_SET_FAMILY] = sizeof(uint32_t),
[NFTNL_SET_POLICY] = sizeof(uint32_t),
[NFTNL_SET_DESC_SIZE] = sizeof(uint32_t),
[NFTNL_SET_TIMEOUT] = sizeof(uint64_t),
[NFTNL_SET_GC_INTERVAL] = sizeof(uint32_t),
};
EXPORT_SYMBOL(nftnl_set_set_data);
int nftnl_set_set_data(struct nftnl_set *s, uint16_t attr, const void *data,
uint32_t data_len)
{
struct nftnl_expr *expr, *tmp;
nftnl_assert_attr_exists(attr, NFTNL_SET_MAX);
nftnl_assert_validate(data, nftnl_set_validate, attr, data_len);
switch(attr) {
case NFTNL_SET_TABLE:
if (s->flags & (1 << NFTNL_SET_TABLE))
xfree(s->table);
s->table = strdup(data);
if (!s->table)
return -1;
break;
case NFTNL_SET_NAME:
if (s->flags & (1 << NFTNL_SET_NAME))
xfree(s->name);
s->name = strdup(data);
if (!s->name)
return -1;
break;
case NFTNL_SET_HANDLE:
memcpy(&s->handle, data, sizeof(s->handle));
break;
case NFTNL_SET_FLAGS:
memcpy(&s->set_flags, data, sizeof(s->set_flags));
break;
case NFTNL_SET_KEY_TYPE:
memcpy(&s->key_type, data, sizeof(s->key_type));
break;
case NFTNL_SET_KEY_LEN:
memcpy(&s->key_len, data, sizeof(s->key_len));
break;
case NFTNL_SET_DATA_TYPE:
memcpy(&s->data_type, data, sizeof(s->data_type));
break;
case NFTNL_SET_DATA_LEN:
memcpy(&s->data_len, data, sizeof(s->data_len));
break;
case NFTNL_SET_OBJ_TYPE:
memcpy(&s->obj_type, data, sizeof(s->obj_type));
break;
case NFTNL_SET_FAMILY:
memcpy(&s->family, data, sizeof(s->family));
break;
case NFTNL_SET_ID:
memcpy(&s->id, data, sizeof(s->id));
break;
case NFTNL_SET_POLICY:
memcpy(&s->policy, data, sizeof(s->policy));
break;
case NFTNL_SET_DESC_SIZE:
memcpy(&s->desc.size, data, sizeof(s->desc.size));
break;
case NFTNL_SET_DESC_CONCAT:
memcpy(&s->desc.field_len, data, data_len);
while (s->desc.field_len[++s->desc.field_count]);
break;
case NFTNL_SET_TIMEOUT:
memcpy(&s->timeout, data, sizeof(s->timeout));
break;
case NFTNL_SET_GC_INTERVAL:
memcpy(&s->gc_interval, data, sizeof(s->gc_interval));
break;
case NFTNL_SET_USERDATA:
if (s->flags & (1 << NFTNL_SET_USERDATA))
xfree(s->user.data);
s->user.data = malloc(data_len);
if (!s->user.data)
return -1;
memcpy(s->user.data, data, data_len);
s->user.len = data_len;
break;
case NFTNL_SET_EXPR:
list_for_each_entry_safe(expr, tmp, &s->expr_list, head)
nftnl_expr_free(expr);
expr = (void *)data;
list_add(&expr->head, &s->expr_list);
break;
}
s->flags |= (1 << attr);
return 0;
}
int nftnl_set_set(struct nftnl_set *s, uint16_t attr, const void *data) __visible;
int nftnl_set_set(struct nftnl_set *s, uint16_t attr, const void *data)
{
return nftnl_set_set_data(s, attr, data, nftnl_set_validate[attr]);
}
EXPORT_SYMBOL(nftnl_set_set_u32);
void nftnl_set_set_u32(struct nftnl_set *s, uint16_t attr, uint32_t val)
{
nftnl_set_set_data(s, attr, &val, sizeof(uint32_t));
}
EXPORT_SYMBOL(nftnl_set_set_u64);
void nftnl_set_set_u64(struct nftnl_set *s, uint16_t attr, uint64_t val)
{
nftnl_set_set_data(s, attr, &val, sizeof(uint64_t));
}
EXPORT_SYMBOL(nftnl_set_set_str);
int nftnl_set_set_str(struct nftnl_set *s, uint16_t attr, const char *str)
{
return nftnl_set_set_data(s, attr, str, strlen(str) + 1);
}
EXPORT_SYMBOL(nftnl_set_get_data);
const void *nftnl_set_get_data(const struct nftnl_set *s, uint16_t attr,
uint32_t *data_len)
{
struct nftnl_expr *expr;
if (!(s->flags & (1 << attr)))
return NULL;
switch(attr) {
case NFTNL_SET_TABLE:
*data_len = strlen(s->table) + 1;
return s->table;
case NFTNL_SET_NAME:
*data_len = strlen(s->name) + 1;
return s->name;
case NFTNL_SET_HANDLE:
*data_len = sizeof(uint64_t);
return &s->handle;
case NFTNL_SET_FLAGS:
*data_len = sizeof(uint32_t);
return &s->set_flags;
case NFTNL_SET_KEY_TYPE:
*data_len = sizeof(uint32_t);
return &s->key_type;
case NFTNL_SET_KEY_LEN:
*data_len = sizeof(uint32_t);
return &s->key_len;
case NFTNL_SET_DATA_TYPE:
*data_len = sizeof(uint32_t);
return &s->data_type;
case NFTNL_SET_DATA_LEN:
*data_len = sizeof(uint32_t);
return &s->data_len;
case NFTNL_SET_OBJ_TYPE:
*data_len = sizeof(uint32_t);
return &s->obj_type;
case NFTNL_SET_FAMILY:
*data_len = sizeof(uint32_t);
return &s->family;
case NFTNL_SET_ID:
*data_len = sizeof(uint32_t);
return &s->id;
case NFTNL_SET_POLICY:
*data_len = sizeof(uint32_t);
return &s->policy;
case NFTNL_SET_DESC_SIZE:
*data_len = sizeof(uint32_t);
return &s->desc.size;
case NFTNL_SET_DESC_CONCAT:
*data_len = s->desc.field_count;
return s->desc.field_len;
case NFTNL_SET_TIMEOUT:
*data_len = sizeof(uint64_t);
return &s->timeout;
case NFTNL_SET_GC_INTERVAL:
*data_len = sizeof(uint32_t);
return &s->gc_interval;
case NFTNL_SET_USERDATA:
*data_len = s->user.len;
return s->user.data;
case NFTNL_SET_EXPR:
list_for_each_entry(expr, &s->expr_list, head)
break;
return expr;
}
return NULL;
}
EXPORT_SYMBOL(nftnl_set_get);
const void *nftnl_set_get(const struct nftnl_set *s, uint16_t attr)
{
uint32_t data_len;
return nftnl_set_get_data(s, attr, &data_len);
}
EXPORT_SYMBOL(nftnl_set_get_str);
const char *nftnl_set_get_str(const struct nftnl_set *s, uint16_t attr)
{
return nftnl_set_get(s, attr);
}
EXPORT_SYMBOL(nftnl_set_get_u32);
uint32_t nftnl_set_get_u32(const struct nftnl_set *s, uint16_t attr)
{
uint32_t data_len;
const uint32_t *val = nftnl_set_get_data(s, attr, &data_len);
nftnl_assert(val, attr, data_len == sizeof(uint32_t));
return val ? *val : 0;
}
EXPORT_SYMBOL(nftnl_set_get_u64);
uint64_t nftnl_set_get_u64(const struct nftnl_set *s, uint16_t attr)
{
uint32_t data_len;
const uint64_t *val = nftnl_set_get_data(s, attr, &data_len);
nftnl_assert(val, attr, data_len == sizeof(uint64_t));
return val ? *val : 0;
}
struct nftnl_set *nftnl_set_clone(const struct nftnl_set *set)
{
struct nftnl_set *newset;
struct nftnl_set_elem *elem, *newelem;
newset = nftnl_set_alloc();
if (newset == NULL)
return NULL;
memcpy(newset, set, sizeof(*set));
if (set->flags & (1 << NFTNL_SET_TABLE)) {
newset->table = strdup(set->table);
if (!newset->table)
goto err;
}
if (set->flags & (1 << NFTNL_SET_NAME)) {
newset->name = strdup(set->name);
if (!newset->name)
goto err;
}
INIT_LIST_HEAD(&newset->element_list);
list_for_each_entry(elem, &set->element_list, head) {
newelem = nftnl_set_elem_clone(elem);
if (newelem == NULL)
goto err;
list_add_tail(&newelem->head, &newset->element_list);
}
return newset;
err:
nftnl_set_free(newset);
return NULL;
}
static void nftnl_set_nlmsg_build_desc_size_payload(struct nlmsghdr *nlh,
struct nftnl_set *s)
{
mnl_attr_put_u32(nlh, NFTA_SET_DESC_SIZE, htonl(s->desc.size));
}
static void nftnl_set_nlmsg_build_desc_concat_payload(struct nlmsghdr *nlh,
struct nftnl_set *s)
{
struct nlattr *nest;
int i;
nest = mnl_attr_nest_start(nlh, NFTA_SET_DESC_CONCAT);
for (i = 0; i < NFT_REG32_COUNT && i < s->desc.field_count; i++) {
struct nlattr *nest_elem;
nest_elem = mnl_attr_nest_start(nlh, NFTA_LIST_ELEM);
mnl_attr_put_u32(nlh, NFTA_SET_FIELD_LEN,
htonl(s->desc.field_len[i]));
mnl_attr_nest_end(nlh, nest_elem);
}
mnl_attr_nest_end(nlh, nest);
}
static void
nftnl_set_nlmsg_build_desc_payload(struct nlmsghdr *nlh, struct nftnl_set *s)
{
struct nlattr *nest;
nest = mnl_attr_nest_start(nlh, NFTA_SET_DESC);
if (s->flags & (1 << NFTNL_SET_DESC_SIZE))
nftnl_set_nlmsg_build_desc_size_payload(nlh, s);
if (s->flags & (1 << NFTNL_SET_DESC_CONCAT))
nftnl_set_nlmsg_build_desc_concat_payload(nlh, s);
mnl_attr_nest_end(nlh, nest);
}
EXPORT_SYMBOL(nftnl_set_nlmsg_build_payload);
void nftnl_set_nlmsg_build_payload(struct nlmsghdr *nlh, struct nftnl_set *s)
{
int num_exprs = 0;
if (s->flags & (1 << NFTNL_SET_TABLE))
mnl_attr_put_strz(nlh, NFTA_SET_TABLE, s->table);
if (s->flags & (1 << NFTNL_SET_NAME))
mnl_attr_put_strz(nlh, NFTA_SET_NAME, s->name);
if (s->flags & (1 << NFTNL_SET_HANDLE))
mnl_attr_put_u64(nlh, NFTA_SET_HANDLE, htobe64(s->handle));
if (s->flags & (1 << NFTNL_SET_FLAGS))
mnl_attr_put_u32(nlh, NFTA_SET_FLAGS, htonl(s->set_flags));
if (s->flags & (1 << NFTNL_SET_KEY_TYPE))
mnl_attr_put_u32(nlh, NFTA_SET_KEY_TYPE, htonl(s->key_type));
if (s->flags & (1 << NFTNL_SET_KEY_LEN))
mnl_attr_put_u32(nlh, NFTA_SET_KEY_LEN, htonl(s->key_len));
/* These are only used to map matching -> action (1:1) */
if (s->flags & (1 << NFTNL_SET_DATA_TYPE))
mnl_attr_put_u32(nlh, NFTA_SET_DATA_TYPE, htonl(s->data_type));
if (s->flags & (1 << NFTNL_SET_DATA_LEN))
mnl_attr_put_u32(nlh, NFTA_SET_DATA_LEN, htonl(s->data_len));
if (s->flags & (1 << NFTNL_SET_OBJ_TYPE))
mnl_attr_put_u32(nlh, NFTA_SET_OBJ_TYPE, htonl(s->obj_type));
if (s->flags & (1 << NFTNL_SET_ID))
mnl_attr_put_u32(nlh, NFTA_SET_ID, htonl(s->id));
if (s->flags & (1 << NFTNL_SET_POLICY))
mnl_attr_put_u32(nlh, NFTA_SET_POLICY, htonl(s->policy));
if (s->flags & (1 << NFTNL_SET_DESC_SIZE | 1 << NFTNL_SET_DESC_CONCAT))
nftnl_set_nlmsg_build_desc_payload(nlh, s);
if (s->flags & (1 << NFTNL_SET_TIMEOUT))
mnl_attr_put_u64(nlh, NFTA_SET_TIMEOUT, htobe64(s->timeout));
if (s->flags & (1 << NFTNL_SET_GC_INTERVAL))
mnl_attr_put_u32(nlh, NFTA_SET_GC_INTERVAL, htonl(s->gc_interval));
if (s->flags & (1 << NFTNL_SET_USERDATA))
mnl_attr_put(nlh, NFTA_SET_USERDATA, s->user.len, s->user.data);
if (!list_empty(&s->expr_list)) {
struct nftnl_expr *expr;
list_for_each_entry(expr, &s->expr_list, head)
num_exprs++;
if (num_exprs == 1) {
struct nlattr *nest1;
nest1 = mnl_attr_nest_start(nlh, NFTA_SET_EXPR);
list_for_each_entry(expr, &s->expr_list, head)
nftnl_expr_build_payload(nlh, expr);
mnl_attr_nest_end(nlh, nest1);
} else if (num_exprs > 1) {
struct nlattr *nest1, *nest2;
nest1 = mnl_attr_nest_start(nlh, NFTA_SET_EXPRESSIONS);
list_for_each_entry(expr, &s->expr_list, head) {
nest2 = mnl_attr_nest_start(nlh, NFTA_LIST_ELEM);
nftnl_expr_build_payload(nlh, expr);
mnl_attr_nest_end(nlh, nest2);
}
mnl_attr_nest_end(nlh, nest1);
}
}
}
EXPORT_SYMBOL(nftnl_set_add_expr);
void nftnl_set_add_expr(struct nftnl_set *s, struct nftnl_expr *expr)
{
list_add_tail(&expr->head, &s->expr_list);
}
EXPORT_SYMBOL(nftnl_set_expr_foreach);
int nftnl_set_expr_foreach(const struct nftnl_set *s,
int (*cb)(struct nftnl_expr *e, void *data),
void *data)
{
struct nftnl_expr *cur, *tmp;
int ret;
list_for_each_entry_safe(cur, tmp, &s->expr_list, head) {
ret = cb(cur, data);
if (ret < 0)
return ret;
}
return 0;
}
static int nftnl_set_parse_attr_cb(const struct nlattr *attr, void *data)
{
const struct nlattr **tb = data;
int type = mnl_attr_get_type(attr);
if (mnl_attr_type_valid(attr, NFTA_SET_MAX) < 0)
return MNL_CB_OK;
switch(type) {
case NFTA_SET_TABLE:
case NFTA_SET_NAME:
if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
abi_breakage();
break;
case NFTA_SET_HANDLE:
if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
abi_breakage();
break;
case NFTA_SET_FLAGS:
case NFTA_SET_KEY_TYPE:
case NFTA_SET_KEY_LEN:
case NFTA_SET_DATA_TYPE:
case NFTA_SET_DATA_LEN:
case NFTA_SET_ID:
case NFTA_SET_POLICY:
case NFTA_SET_GC_INTERVAL:
if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
abi_breakage();
break;
case NFTA_SET_USERDATA:
if (mnl_attr_validate(attr, MNL_TYPE_BINARY) < 0)
abi_breakage();
break;
case NFTA_SET_TIMEOUT:
if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
abi_breakage();
break;
case NFTA_SET_DESC:
case NFTA_SET_EXPR:
case NFTA_SET_EXPRESSIONS:
if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
abi_breakage();
break;
}
tb[type] = attr;
return MNL_CB_OK;
}
static int
nftnl_set_desc_concat_field_parse_attr_cb(const struct nlattr *attr, void *data)
{
int type = mnl_attr_get_type(attr);
struct nftnl_set *s = data;
if (type != NFTA_SET_FIELD_LEN)
return MNL_CB_OK;
if (mnl_attr_validate(attr, MNL_TYPE_U32))
return MNL_CB_ERROR;
s->desc.field_len[s->desc.field_count] = ntohl(mnl_attr_get_u32(attr));
s->desc.field_count++;
return MNL_CB_OK;
}
static int
nftnl_set_desc_concat_parse_attr_cb(const struct nlattr *attr, void *data)
{
int type = mnl_attr_get_type(attr);
struct nftnl_set *s = data;
if (type != NFTA_LIST_ELEM)
return MNL_CB_OK;
return mnl_attr_parse_nested(attr,
nftnl_set_desc_concat_field_parse_attr_cb,
s);
}
static int nftnl_set_desc_parse_attr_cb(const struct nlattr *attr, void *data)
{
int type = mnl_attr_get_type(attr), err;
struct nftnl_set *s = data;
if (mnl_attr_type_valid(attr, NFTA_SET_DESC_MAX) < 0)
return MNL_CB_OK;
switch (type) {
case NFTA_SET_DESC_SIZE:
if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) {
abi_breakage();
break;
}
s->desc.size = ntohl(mnl_attr_get_u32(attr));
s->flags |= (1 << NFTNL_SET_DESC_SIZE);
break;
case NFTA_SET_DESC_CONCAT:
err = mnl_attr_parse_nested(attr,
nftnl_set_desc_concat_parse_attr_cb,
s);
if (err != MNL_CB_OK)
abi_breakage();
s->flags |= (1 << NFTNL_SET_DESC_CONCAT);
break;
default:
break;
}
return MNL_CB_OK;
}
static int nftnl_set_desc_parse(struct nftnl_set *s, const struct nlattr *attr)
{
return mnl_attr_parse_nested(attr, nftnl_set_desc_parse_attr_cb, s);
}
EXPORT_SYMBOL(nftnl_set_nlmsg_parse);
int nftnl_set_nlmsg_parse(const struct nlmsghdr *nlh, struct nftnl_set *s)
{
struct nlattr *tb[NFTA_SET_MAX+1] = {};
struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
struct nftnl_expr *expr, *next;
int ret;
if (mnl_attr_parse(nlh, sizeof(*nfg), nftnl_set_parse_attr_cb, tb) < 0)
return -1;
if (tb[NFTA_SET_TABLE]) {
if (s->flags & (1 << NFTNL_SET_TABLE))
xfree(s->table);
s->table = strdup(mnl_attr_get_str(tb[NFTA_SET_TABLE]));
if (!s->table)
return -1;
s->flags |= (1 << NFTNL_SET_TABLE);
}
if (tb[NFTA_SET_NAME]) {
if (s->flags & (1 << NFTNL_SET_NAME))
xfree(s->name);
s->name = strdup(mnl_attr_get_str(tb[NFTA_SET_NAME]));
if (!s->name)
return -1;
s->flags |= (1 << NFTNL_SET_NAME);
}
if (tb[NFTA_SET_HANDLE]) {
s->handle = be64toh(mnl_attr_get_u64(tb[NFTA_SET_HANDLE]));
s->flags |= (1 << NFTNL_SET_HANDLE);
}
if (tb[NFTA_SET_FLAGS]) {
s->set_flags = ntohl(mnl_attr_get_u32(tb[NFTA_SET_FLAGS]));
s->flags |= (1 << NFTNL_SET_FLAGS);
}
if (tb[NFTA_SET_KEY_TYPE]) {
s->key_type = ntohl(mnl_attr_get_u32(tb[NFTA_SET_KEY_TYPE]));
s->flags |= (1 << NFTNL_SET_KEY_TYPE);
}
if (tb[NFTA_SET_KEY_LEN]) {
s->key_len = ntohl(mnl_attr_get_u32(tb[NFTA_SET_KEY_LEN]));
s->flags |= (1 << NFTNL_SET_KEY_LEN);
}
if (tb[NFTA_SET_DATA_TYPE]) {
s->data_type = ntohl(mnl_attr_get_u32(tb[NFTA_SET_DATA_TYPE]));
s->flags |= (1 << NFTNL_SET_DATA_TYPE);
}
if (tb[NFTA_SET_DATA_LEN]) {
s->data_len = ntohl(mnl_attr_get_u32(tb[NFTA_SET_DATA_LEN]));
s->flags |= (1 << NFTNL_SET_DATA_LEN);
}
if (tb[NFTA_SET_OBJ_TYPE]) {
s->obj_type = ntohl(mnl_attr_get_u32(tb[NFTA_SET_OBJ_TYPE]));
s->flags |= (1 << NFTNL_SET_OBJ_TYPE);
}
if (tb[NFTA_SET_ID]) {
s->id = ntohl(mnl_attr_get_u32(tb[NFTA_SET_ID]));
s->flags |= (1 << NFTNL_SET_ID);
}
if (tb[NFTA_SET_POLICY]) {
s->policy = ntohl(mnl_attr_get_u32(tb[NFTA_SET_POLICY]));
s->flags |= (1 << NFTNL_SET_POLICY);
}
if (tb[NFTA_SET_TIMEOUT]) {
s->timeout = be64toh(mnl_attr_get_u64(tb[NFTA_SET_TIMEOUT]));
s->flags |= (1 << NFTNL_SET_TIMEOUT);
}
if (tb[NFTA_SET_GC_INTERVAL]) {
s->gc_interval = ntohl(mnl_attr_get_u32(tb[NFTA_SET_GC_INTERVAL]));
s->flags |= (1 << NFTNL_SET_GC_INTERVAL);
}
if (tb[NFTA_SET_USERDATA]) {
ret = nftnl_set_set_data(s, NFTNL_SET_USERDATA,
mnl_attr_get_payload(tb[NFTA_SET_USERDATA]),
mnl_attr_get_payload_len(tb[NFTA_SET_USERDATA]));
if (ret < 0)
return ret;
}
if (tb[NFTA_SET_DESC]) {
ret = nftnl_set_desc_parse(s, tb[NFTA_SET_DESC]);
if (ret < 0)
return ret;
}
if (tb[NFTA_SET_EXPR]) {
expr = nftnl_expr_parse(tb[NFTA_SET_EXPR]);
if (!expr)
goto out_set_expr;
list_add(&expr->head, &s->expr_list);
s->flags |= (1 << NFTNL_SET_EXPR);
} else if (tb[NFTA_SET_EXPRESSIONS]) {
struct nlattr *attr;
mnl_attr_for_each_nested(attr, tb[NFTA_SET_EXPRESSIONS]) {
if (mnl_attr_get_type(attr) != NFTA_LIST_ELEM)
goto out_set_expr;
expr = nftnl_expr_parse(attr);
if (expr == NULL)
goto out_set_expr;
list_add_tail(&expr->head, &s->expr_list);
}
s->flags |= (1 << NFTNL_SET_EXPRESSIONS);
}
s->family = nfg->nfgen_family;
s->flags |= (1 << NFTNL_SET_FAMILY);
return 0;
out_set_expr:
list_for_each_entry_safe(expr, next, &s->expr_list, head)
nftnl_expr_free(expr);
return -1;
}
static int nftnl_set_do_parse(struct nftnl_set *s, enum nftnl_parse_type type,
const void *data, struct nftnl_parse_err *err,
enum nftnl_parse_input input)
{
int ret;
struct nftnl_parse_err perr = {};
switch (type) {
case NFTNL_PARSE_JSON:
case NFTNL_PARSE_XML:
default:
ret = -1;
errno = EOPNOTSUPP;
break;
}
if (err != NULL)
*err = perr;
return ret;
}
EXPORT_SYMBOL(nftnl_set_parse);
int nftnl_set_parse(struct nftnl_set *s, enum nftnl_parse_type type,
const char *data, struct nftnl_parse_err *err)
{
return nftnl_set_do_parse(s, type, data, err, NFTNL_PARSE_BUFFER);
}
EXPORT_SYMBOL(nftnl_set_parse_file);
int nftnl_set_parse_file(struct nftnl_set *s, enum nftnl_parse_type type,
FILE *fp, struct nftnl_parse_err *err)
{
return nftnl_set_do_parse(s, type, fp, err, NFTNL_PARSE_FILE);
}
static int nftnl_set_snprintf_default(char *buf, size_t size,
const struct nftnl_set *s,
uint32_t type, uint32_t flags)
{
int ret;
int remain = size, offset = 0;
struct nftnl_set_elem *elem;
ret = snprintf(buf, remain, "%s %s %x",
s->name, s->table, s->set_flags);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
if (s->flags & (1 << NFTNL_SET_TIMEOUT)) {
ret = snprintf(buf + offset, remain, " timeout %"PRIu64"ms",
s->timeout);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
}
if (s->flags & (1 << NFTNL_SET_GC_INTERVAL)) {
ret = snprintf(buf + offset, remain, " gc_interval %ums",
s->gc_interval);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
}
if (s->flags & (1 << NFTNL_SET_POLICY)) {
ret = snprintf(buf + offset, remain, " policy %u", s->policy);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
}
if (s->flags & (1 << NFTNL_SET_DESC_SIZE)) {
ret = snprintf(buf + offset, remain, " size %u", s->desc.size);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
}
/* Empty set? Skip printinf of elements */
if (list_empty(&s->element_list))
return offset;
ret = snprintf(buf + offset, remain, "\n");
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
list_for_each_entry(elem, &s->element_list, head) {
ret = snprintf(buf + offset, remain, "\t");
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
ret = nftnl_set_elem_snprintf(buf + offset, remain, elem, type,
flags);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
}
return offset;
}
static int nftnl_set_cmd_snprintf(char *buf, size_t size,
const struct nftnl_set *s, uint32_t cmd,
uint32_t type, uint32_t flags)
{
int ret, remain = size, offset = 0;
uint32_t inner_flags = flags;
if (type == NFTNL_OUTPUT_XML)
return 0;
/* prevent set_elems to print as events */
inner_flags &= ~NFTNL_OF_EVENT_ANY;
switch(type) {
case NFTNL_OUTPUT_DEFAULT:
ret = nftnl_set_snprintf_default(buf + offset, remain, s, type,
inner_flags);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
break;
default:
return -1;
}
return offset;
}
EXPORT_SYMBOL(nftnl_set_snprintf);
int nftnl_set_snprintf(char *buf, size_t size, const struct nftnl_set *s,
uint32_t type, uint32_t flags)
{
if (size)
buf[0] = '\0';
return nftnl_set_cmd_snprintf(buf, size, s, nftnl_flag2cmd(flags), type,
flags);
}
static int nftnl_set_do_snprintf(char *buf, size_t size, const void *s,
uint32_t cmd, uint32_t type, uint32_t flags)
{
return nftnl_set_snprintf(buf, size, s, type, flags);
}
EXPORT_SYMBOL(nftnl_set_fprintf);
int nftnl_set_fprintf(FILE *fp, const struct nftnl_set *s, uint32_t type,
uint32_t flags)
{
return nftnl_fprintf(fp, s, NFTNL_CMD_UNSPEC, type, flags,
nftnl_set_do_snprintf);
}
EXPORT_SYMBOL(nftnl_set_elem_add);
void nftnl_set_elem_add(struct nftnl_set *s, struct nftnl_set_elem *elem)
{
list_add_tail(&elem->head, &s->element_list);
}
#define SET_NAME_HSIZE 512
struct nftnl_set_list {
struct list_head list;
struct hlist_head name_hash[SET_NAME_HSIZE];
};
EXPORT_SYMBOL(nftnl_set_list_alloc);
struct nftnl_set_list *nftnl_set_list_alloc(void)
{
struct nftnl_set_list *list;
int i;
list = calloc(1, sizeof(struct nftnl_set_list));
if (list == NULL)
return NULL;
INIT_LIST_HEAD(&list->list);
for (i = 0; i < SET_NAME_HSIZE; i++)
INIT_HLIST_HEAD(&list->name_hash[i]);
return list;
}
EXPORT_SYMBOL(nftnl_set_list_free);
void nftnl_set_list_free(struct nftnl_set_list *list)
{
struct nftnl_set *s, *tmp;
list_for_each_entry_safe(s, tmp, &list->list, head) {
list_del(&s->head);
hlist_del(&s->hnode);
nftnl_set_free(s);
}
xfree(list);
}
EXPORT_SYMBOL(nftnl_set_list_is_empty);
int nftnl_set_list_is_empty(const struct nftnl_set_list *list)
{
return list_empty(&list->list);
}
static uint32_t djb_hash(const char *key)
{
uint32_t i, hash = 5381;
for (i = 0; i < strlen(key); i++)
hash = ((hash << 5) + hash) + key[i];
return hash;
}
EXPORT_SYMBOL(nftnl_set_list_add);
void nftnl_set_list_add(struct nftnl_set *s, struct nftnl_set_list *list)
{
int key = djb_hash(s->name) % SET_NAME_HSIZE;
hlist_add_head(&s->hnode, &list->name_hash[key]);
list_add(&s->head, &list->list);
}
EXPORT_SYMBOL(nftnl_set_list_add_tail);
void nftnl_set_list_add_tail(struct nftnl_set *s, struct nftnl_set_list *list)
{
int key = djb_hash(s->name) % SET_NAME_HSIZE;
hlist_add_head(&s->hnode, &list->name_hash[key]);
list_add_tail(&s->head, &list->list);
}
EXPORT_SYMBOL(nftnl_set_list_del);
void nftnl_set_list_del(struct nftnl_set *s)
{
list_del(&s->head);
hlist_del(&s->hnode);
}
EXPORT_SYMBOL(nftnl_set_list_foreach);
int nftnl_set_list_foreach(struct nftnl_set_list *set_list,
int (*cb)(struct nftnl_set *t, void *data), void *data)
{
struct nftnl_set *cur, *tmp;
int ret;
list_for_each_entry_safe(cur, tmp, &set_list->list, head) {
ret = cb(cur, data);
if (ret < 0)
return ret;
}
return 0;
}
struct nftnl_set_list_iter {
const struct nftnl_set_list *list;
struct nftnl_set *cur;
};
EXPORT_SYMBOL(nftnl_set_list_iter_create);
struct nftnl_set_list_iter *
nftnl_set_list_iter_create(const struct nftnl_set_list *l)
{
struct nftnl_set_list_iter *iter;
iter = calloc(1, sizeof(struct nftnl_set_list_iter));
if (iter == NULL)
return NULL;
iter->list = l;
if (nftnl_set_list_is_empty(l))
iter->cur = NULL;
else
iter->cur = list_entry(l->list.next, struct nftnl_set, head);
return iter;
}
EXPORT_SYMBOL(nftnl_set_list_iter_cur);
struct nftnl_set *
nftnl_set_list_iter_cur(const struct nftnl_set_list_iter *iter)
{
return iter->cur;
}
EXPORT_SYMBOL(nftnl_set_list_iter_next);
struct nftnl_set *nftnl_set_list_iter_next(struct nftnl_set_list_iter *iter)
{
struct nftnl_set *s = iter->cur;
if (s == NULL)
return NULL;
/* get next rule, if any */
iter->cur = list_entry(iter->cur->head.next, struct nftnl_set, head);
if (&iter->cur->head == iter->list->list.next)
return NULL;
return s;
}
EXPORT_SYMBOL(nftnl_set_list_iter_destroy);
void nftnl_set_list_iter_destroy(const struct nftnl_set_list_iter *iter)
{
xfree(iter);
}
EXPORT_SYMBOL(nftnl_set_list_lookup_byname);
struct nftnl_set *
nftnl_set_list_lookup_byname(struct nftnl_set_list *set_list, const char *set)
{
int key = djb_hash(set) % SET_NAME_HSIZE;
struct hlist_node *n;
struct nftnl_set *s;
hlist_for_each_entry(s, n, &set_list->name_hash[key], hnode) {
if (!strcmp(set, s->name))
return s;
}
return NULL;
}
int nftnl_set_lookup_id(struct nftnl_expr *e,
struct nftnl_set_list *set_list, uint32_t *set_id)
{
const char *set_name;
struct nftnl_set *s;
set_name = nftnl_expr_get_str(e, NFTNL_EXPR_LOOKUP_SET);
if (set_name == NULL)
return 0;
s = nftnl_set_list_lookup_byname(set_list, set_name);
if (s == NULL)
return 0;
*set_id = nftnl_set_get_u32(s, NFTNL_SET_ID);
return 1;
}
nftnl_set_list_iter
Definition: set.c:990
nftnl_set_list
Definition: set.c:899