flowtable.c
#include "internal.h"
#include <time.h>
#include <endian.h>
#include <stdint.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <netinet/in.h>
#include <errno.h>
#include <inttypes.h>
#include <libmnl/libmnl.h>
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nf_tables.h>
#include <linux/netfilter.h>
#include <linux/netfilter_arp.h>
#include <libnftnl/flowtable.h>
struct nftnl_flowtable {
struct list_head head;
const char *name;
const char *table;
int family;
uint32_t hooknum;
int32_t prio;
uint32_t size;
const char **dev_array;
uint32_t dev_array_len;
uint32_t ft_flags;
uint32_t use;
uint32_t flags;
uint64_t handle;
};
EXPORT_SYMBOL(nftnl_flowtable_alloc);
struct nftnl_flowtable *nftnl_flowtable_alloc(void)
{
return calloc(1, sizeof(struct nftnl_flowtable));
}
EXPORT_SYMBOL(nftnl_flowtable_free);
void nftnl_flowtable_free(const struct nftnl_flowtable *c)
{
int i;
if (c->flags & (1 << NFTNL_FLOWTABLE_NAME))
xfree(c->name);
if (c->flags & (1 << NFTNL_FLOWTABLE_TABLE))
xfree(c->table);
if (c->flags & (1 << NFTNL_FLOWTABLE_DEVICES)) {
for (i = 0; i < c->dev_array_len; i++)
xfree(c->dev_array[i]);
xfree(c->dev_array);
}
xfree(c);
}
EXPORT_SYMBOL(nftnl_flowtable_is_set);
bool nftnl_flowtable_is_set(const struct nftnl_flowtable *c, uint16_t attr)
{
return c->flags & (1 << attr);
}
EXPORT_SYMBOL(nftnl_flowtable_unset);
void nftnl_flowtable_unset(struct nftnl_flowtable *c, uint16_t attr)
{
int i;
if (!(c->flags & (1 << attr)))
return;
switch (attr) {
case NFTNL_FLOWTABLE_NAME:
xfree(c->name);
break;
case NFTNL_FLOWTABLE_TABLE:
xfree(c->table);
break;
case NFTNL_FLOWTABLE_HOOKNUM:
case NFTNL_FLOWTABLE_PRIO:
case NFTNL_FLOWTABLE_USE:
case NFTNL_FLOWTABLE_FAMILY:
case NFTNL_FLOWTABLE_FLAGS:
case NFTNL_FLOWTABLE_HANDLE:
break;
case NFTNL_FLOWTABLE_DEVICES:
for (i = 0; i < c->dev_array_len; i++)
xfree(c->dev_array[i]);
xfree(c->dev_array);
break;
default:
return;
}
c->flags &= ~(1 << attr);
}
static uint32_t nftnl_flowtable_validate[NFTNL_FLOWTABLE_MAX + 1] = {
[NFTNL_FLOWTABLE_HOOKNUM] = sizeof(uint32_t),
[NFTNL_FLOWTABLE_PRIO] = sizeof(int32_t),
[NFTNL_FLOWTABLE_FAMILY] = sizeof(uint32_t),
[NFTNL_FLOWTABLE_FLAGS] = sizeof(uint32_t),
[NFTNL_FLOWTABLE_HANDLE] = sizeof(uint64_t),
};
EXPORT_SYMBOL(nftnl_flowtable_set_data);
int nftnl_flowtable_set_data(struct nftnl_flowtable *c, uint16_t attr,
const void *data, uint32_t data_len)
{
const char **dev_array;
int len = 0, i;
nftnl_assert_attr_exists(attr, NFTNL_FLOWTABLE_MAX);
nftnl_assert_validate(data, nftnl_flowtable_validate, attr, data_len);
switch(attr) {
case NFTNL_FLOWTABLE_NAME:
if (c->flags & (1 << NFTNL_FLOWTABLE_NAME))
xfree(c->name);
c->name = strdup(data);
if (!c->name)
return -1;
break;
case NFTNL_FLOWTABLE_TABLE:
if (c->flags & (1 << NFTNL_FLOWTABLE_TABLE))
xfree(c->table);
c->table = strdup(data);
if (!c->table)
return -1;
break;
case NFTNL_FLOWTABLE_HOOKNUM:
memcpy(&c->hooknum, data, sizeof(c->hooknum));
break;
case NFTNL_FLOWTABLE_PRIO:
memcpy(&c->prio, data, sizeof(c->prio));
break;
case NFTNL_FLOWTABLE_FAMILY:
memcpy(&c->family, data, sizeof(c->family));
break;
case NFTNL_FLOWTABLE_DEVICES:
dev_array = (const char **)data;
while (dev_array[len] != NULL)
len++;
if (c->flags & (1 << NFTNL_FLOWTABLE_DEVICES)) {
for (i = 0; i < c->dev_array_len; i++)
xfree(c->dev_array[i]);
xfree(c->dev_array);
}
c->dev_array = calloc(len + 1, sizeof(char *));
if (!c->dev_array)
return -1;
for (i = 0; i < len; i++)
c->dev_array[i] = strdup(dev_array[i]);
c->dev_array_len = len;
break;
case NFTNL_FLOWTABLE_SIZE:
memcpy(&c->size, data, sizeof(c->size));
break;
case NFTNL_FLOWTABLE_FLAGS:
memcpy(&c->ft_flags, data, sizeof(c->ft_flags));
break;
case NFTNL_FLOWTABLE_HANDLE:
memcpy(&c->handle, data, sizeof(c->handle));
break;
}
c->flags |= (1 << attr);
return 0;
}
void nftnl_flowtable_set(struct nftnl_flowtable *c, uint16_t attr, const void *data) __visible;
void nftnl_flowtable_set(struct nftnl_flowtable *c, uint16_t attr, const void *data)
{
nftnl_flowtable_set_data(c, attr, data, nftnl_flowtable_validate[attr]);
}
EXPORT_SYMBOL(nftnl_flowtable_set_u32);
void nftnl_flowtable_set_u32(struct nftnl_flowtable *c, uint16_t attr, uint32_t data)
{
nftnl_flowtable_set_data(c, attr, &data, sizeof(uint32_t));
}
EXPORT_SYMBOL(nftnl_flowtable_set_s32);
void nftnl_flowtable_set_s32(struct nftnl_flowtable *c, uint16_t attr, int32_t data)
{
nftnl_flowtable_set_data(c, attr, &data, sizeof(int32_t));
}
EXPORT_SYMBOL(nftnl_flowtable_set_str);
int nftnl_flowtable_set_str(struct nftnl_flowtable *c, uint16_t attr, const char *str)
{
return nftnl_flowtable_set_data(c, attr, str, strlen(str) + 1);
}
EXPORT_SYMBOL(nftnl_flowtable_set_u64);
void nftnl_flowtable_set_u64(struct nftnl_flowtable *c, uint16_t attr, uint64_t data)
{
nftnl_flowtable_set_data(c, attr, &data, sizeof(uint64_t));
}
EXPORT_SYMBOL(nftnl_flowtable_set_array);
int nftnl_flowtable_set_array(struct nftnl_flowtable *c, uint16_t attr,
const char **data)
{
return nftnl_flowtable_set_data(c, attr, data, 0);
}
EXPORT_SYMBOL(nftnl_flowtable_get_data);
const void *nftnl_flowtable_get_data(const struct nftnl_flowtable *c,
uint16_t attr, uint32_t *data_len)
{
if (!(c->flags & (1 << attr)))
return NULL;
switch(attr) {
case NFTNL_FLOWTABLE_NAME:
*data_len = strlen(c->name) + 1;
return c->name;
case NFTNL_FLOWTABLE_TABLE:
*data_len = strlen(c->table) + 1;
return c->table;
case NFTNL_FLOWTABLE_HOOKNUM:
*data_len = sizeof(uint32_t);
return &c->hooknum;
case NFTNL_FLOWTABLE_PRIO:
*data_len = sizeof(int32_t);
return &c->prio;
case NFTNL_FLOWTABLE_FAMILY:
*data_len = sizeof(int32_t);
return &c->family;
case NFTNL_FLOWTABLE_DEVICES:
*data_len = 0;
return &c->dev_array[0];
case NFTNL_FLOWTABLE_SIZE:
*data_len = sizeof(int32_t);
return &c->size;
case NFTNL_FLOWTABLE_FLAGS:
*data_len = sizeof(int32_t);
return &c->ft_flags;
case NFTNL_FLOWTABLE_HANDLE:
*data_len = sizeof(uint64_t);
return &c->handle;
}
return NULL;
}
EXPORT_SYMBOL(nftnl_flowtable_get);
const void *nftnl_flowtable_get(const struct nftnl_flowtable *c, uint16_t attr)
{
uint32_t data_len;
return nftnl_flowtable_get_data(c, attr, &data_len);
}
EXPORT_SYMBOL(nftnl_flowtable_get_str);
const char *nftnl_flowtable_get_str(const struct nftnl_flowtable *c, uint16_t attr)
{
return nftnl_flowtable_get(c, attr);
}
EXPORT_SYMBOL(nftnl_flowtable_get_u32);
uint32_t nftnl_flowtable_get_u32(const struct nftnl_flowtable *c, uint16_t attr)
{
uint32_t data_len = 0;
const uint32_t *val = nftnl_flowtable_get_data(c, attr, &data_len);
nftnl_assert(val, attr, data_len == sizeof(uint32_t));
return val ? *val : 0;
}
EXPORT_SYMBOL(nftnl_flowtable_get_u64);
uint64_t nftnl_flowtable_get_u64(const struct nftnl_flowtable *c, uint16_t attr)
{
uint32_t data_len = 0;
const uint64_t *val = nftnl_flowtable_get_data(c, attr, &data_len);
nftnl_assert(val, attr, data_len == sizeof(uint64_t));
return val ? *val : 0;
}
EXPORT_SYMBOL(nftnl_flowtable_get_s32);
int32_t nftnl_flowtable_get_s32(const struct nftnl_flowtable *c, uint16_t attr)
{
uint32_t data_len = 0;
const int32_t *val = nftnl_flowtable_get_data(c, attr, &data_len);
nftnl_assert(val, attr, data_len == sizeof(int32_t));
return val ? *val : 0;
}
EXPORT_SYMBOL(nftnl_flowtable_get_array);
const char *const *nftnl_flowtable_get_array(const struct nftnl_flowtable *c, uint16_t attr)
{
uint32_t data_len;
const char * const *val = nftnl_flowtable_get_data(c, attr, &data_len);
nftnl_assert(val, attr, attr == NFTNL_FLOWTABLE_DEVICES);
return val;
}
EXPORT_SYMBOL(nftnl_flowtable_nlmsg_build_payload);
void nftnl_flowtable_nlmsg_build_payload(struct nlmsghdr *nlh,
const struct nftnl_flowtable *c)
{
struct nlattr *nest = NULL;
int i;
if (c->flags & (1 << NFTNL_FLOWTABLE_TABLE))
mnl_attr_put_strz(nlh, NFTA_FLOWTABLE_TABLE, c->table);
if (c->flags & (1 << NFTNL_FLOWTABLE_NAME))
mnl_attr_put_strz(nlh, NFTA_FLOWTABLE_NAME, c->name);
if (c->flags & (1 << NFTNL_FLOWTABLE_HOOKNUM) ||
c->flags & (1 << NFTNL_FLOWTABLE_PRIO) ||
c->flags & (1 << NFTNL_FLOWTABLE_DEVICES))
nest = mnl_attr_nest_start(nlh, NFTA_FLOWTABLE_HOOK);
if (c->flags & (1 << NFTNL_FLOWTABLE_HOOKNUM))
mnl_attr_put_u32(nlh, NFTA_FLOWTABLE_HOOK_NUM, htonl(c->hooknum));
if (c->flags & (1 << NFTNL_FLOWTABLE_PRIO))
mnl_attr_put_u32(nlh, NFTA_FLOWTABLE_HOOK_PRIORITY, htonl(c->prio));
if (c->flags & (1 << NFTNL_FLOWTABLE_DEVICES)) {
struct nlattr *nest_dev;
nest_dev = mnl_attr_nest_start(nlh, NFTA_FLOWTABLE_HOOK_DEVS);
for (i = 0; i < c->dev_array_len; i++) {
mnl_attr_put_strz(nlh, NFTA_DEVICE_NAME,
c->dev_array[i]);
}
mnl_attr_nest_end(nlh, nest_dev);
}
if (nest)
mnl_attr_nest_end(nlh, nest);
if (c->flags & (1 << NFTNL_FLOWTABLE_FLAGS))
mnl_attr_put_u32(nlh, NFTA_FLOWTABLE_FLAGS, htonl(c->ft_flags));
if (c->flags & (1 << NFTNL_FLOWTABLE_USE))
mnl_attr_put_u32(nlh, NFTA_FLOWTABLE_USE, htonl(c->use));
if (c->flags & (1 << NFTNL_FLOWTABLE_HANDLE))
mnl_attr_put_u64(nlh, NFTA_FLOWTABLE_HANDLE, htobe64(c->handle));
}
static int nftnl_flowtable_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_FLOWTABLE_MAX) < 0)
return MNL_CB_OK;
switch(type) {
case NFTA_FLOWTABLE_NAME:
case NFTA_FLOWTABLE_TABLE:
if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
abi_breakage();
break;
case NFTA_FLOWTABLE_HOOK:
if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
abi_breakage();
break;
case NFTA_FLOWTABLE_FLAGS:
case NFTA_FLOWTABLE_USE:
if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
abi_breakage();
break;
case NFTA_FLOWTABLE_HANDLE:
if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
abi_breakage();
break;
}
tb[type] = attr;
return MNL_CB_OK;
}
static int nftnl_flowtable_parse_hook_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_FLOWTABLE_HOOK_MAX) < 0)
return MNL_CB_OK;
switch(type) {
case NFTA_FLOWTABLE_HOOK_NUM:
case NFTA_FLOWTABLE_HOOK_PRIORITY:
if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
abi_breakage();
break;
case NFTA_FLOWTABLE_HOOK_DEVS:
if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
abi_breakage();
break;
}
tb[type] = attr;
return MNL_CB_OK;
}
static int nftnl_flowtable_parse_devs(struct nlattr *nest,
struct nftnl_flowtable *c)
{
const char **dev_array, **tmp;
int len = 0, size = 8;
struct nlattr *attr;
dev_array = calloc(8, sizeof(char *));
if (!dev_array)
return -1;
mnl_attr_for_each_nested(attr, nest) {
if (mnl_attr_get_type(attr) != NFTA_DEVICE_NAME)
goto err;
dev_array[len++] = strdup(mnl_attr_get_str(attr));
if (len >= size) {
tmp = realloc(dev_array, size * 2 * sizeof(char *));
if (!tmp)
goto err;
size *= 2;
memset(&tmp[len], 0, (size - len) * sizeof(char *));
dev_array = tmp;
}
}
c->dev_array = dev_array;
c->dev_array_len = len;
return 0;
err:
while (len--)
xfree(dev_array[len]);
xfree(dev_array);
return -1;
}
static int nftnl_flowtable_parse_hook(struct nlattr *attr, struct nftnl_flowtable *c)
{
struct nlattr *tb[NFTA_FLOWTABLE_HOOK_MAX + 1] = {};
int ret;
if (mnl_attr_parse_nested(attr, nftnl_flowtable_parse_hook_cb, tb) < 0)
return -1;
if (tb[NFTA_FLOWTABLE_HOOK_NUM]) {
c->hooknum = ntohl(mnl_attr_get_u32(tb[NFTA_FLOWTABLE_HOOK_NUM]));
c->flags |= (1 << NFTNL_FLOWTABLE_HOOKNUM);
}
if (tb[NFTA_FLOWTABLE_HOOK_PRIORITY]) {
c->prio = ntohl(mnl_attr_get_u32(tb[NFTA_FLOWTABLE_HOOK_PRIORITY]));
c->flags |= (1 << NFTNL_FLOWTABLE_PRIO);
}
if (tb[NFTA_FLOWTABLE_HOOK_DEVS]) {
ret = nftnl_flowtable_parse_devs(tb[NFTA_FLOWTABLE_HOOK_DEVS], c);
if (ret < 0)
return -1;
c->flags |= (1 << NFTNL_FLOWTABLE_DEVICES);
}
return 0;
}
EXPORT_SYMBOL(nftnl_flowtable_nlmsg_parse);
int nftnl_flowtable_nlmsg_parse(const struct nlmsghdr *nlh, struct nftnl_flowtable *c)
{
struct nlattr *tb[NFTA_FLOWTABLE_MAX + 1] = {};
struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
int ret = 0;
if (mnl_attr_parse(nlh, sizeof(*nfg), nftnl_flowtable_parse_attr_cb, tb) < 0)
return -1;
if (tb[NFTA_FLOWTABLE_NAME]) {
if (c->flags & (1 << NFTNL_FLOWTABLE_NAME))
xfree(c->name);
c->name = strdup(mnl_attr_get_str(tb[NFTA_FLOWTABLE_NAME]));
if (!c->name)
return -1;
c->flags |= (1 << NFTNL_FLOWTABLE_NAME);
}
if (tb[NFTA_FLOWTABLE_TABLE]) {
if (c->flags & (1 << NFTNL_FLOWTABLE_TABLE))
xfree(c->table);
c->table = strdup(mnl_attr_get_str(tb[NFTA_FLOWTABLE_TABLE]));
if (!c->table)
return -1;
c->flags |= (1 << NFTNL_FLOWTABLE_TABLE);
}
if (tb[NFTA_FLOWTABLE_HOOK]) {
ret = nftnl_flowtable_parse_hook(tb[NFTA_FLOWTABLE_HOOK], c);
if (ret < 0)
return ret;
}
if (tb[NFTA_FLOWTABLE_FLAGS]) {
c->ft_flags = ntohl(mnl_attr_get_u32(tb[NFTA_FLOWTABLE_FLAGS]));
c->flags |= (1 << NFTNL_FLOWTABLE_FLAGS);
}
if (tb[NFTA_FLOWTABLE_USE]) {
c->use = ntohl(mnl_attr_get_u32(tb[NFTA_FLOWTABLE_USE]));
c->flags |= (1 << NFTNL_FLOWTABLE_USE);
}
if (tb[NFTA_FLOWTABLE_HANDLE]) {
c->handle = be64toh(mnl_attr_get_u64(tb[NFTA_FLOWTABLE_HANDLE]));
c->flags |= (1 << NFTNL_FLOWTABLE_HANDLE);
}
c->family = nfg->nfgen_family;
c->flags |= (1 << NFTNL_FLOWTABLE_FAMILY);
return ret;
}
static const char *nftnl_hooknum2str(int family, int hooknum)
{
switch (family) {
case NFPROTO_IPV4:
case NFPROTO_IPV6:
case NFPROTO_INET:
case NFPROTO_BRIDGE:
switch (hooknum) {
case NF_INET_PRE_ROUTING:
return "prerouting";
case NF_INET_LOCAL_IN:
return "input";
case NF_INET_FORWARD:
return "forward";
case NF_INET_LOCAL_OUT:
return "output";
case NF_INET_POST_ROUTING:
return "postrouting";
}
break;
case NFPROTO_ARP:
switch (hooknum) {
case NF_ARP_IN:
return "input";
case NF_ARP_OUT:
return "output";
case NF_ARP_FORWARD:
return "forward";
}
break;
case NFPROTO_NETDEV:
switch (hooknum) {
case NF_NETDEV_INGRESS:
return "ingress";
}
break;
}
return "unknown";
}
static inline int nftnl_str2hooknum(int family, const char *hook)
{
int hooknum;
for (hooknum = 0; hooknum < NF_INET_NUMHOOKS; hooknum++) {
if (strcmp(hook, nftnl_hooknum2str(family, hooknum)) == 0)
return hooknum;
}
return -1;
}
EXPORT_SYMBOL(nftnl_flowtable_parse);
int nftnl_flowtable_parse(struct nftnl_flowtable *c, enum nftnl_parse_type type,
const char *data, struct nftnl_parse_err *err)
{
errno = EOPNOTSUPP;
return -1;
}
EXPORT_SYMBOL(nftnl_flowtable_parse_file);
int nftnl_flowtable_parse_file(struct nftnl_flowtable *c,
enum nftnl_parse_type type,
FILE *fp, struct nftnl_parse_err *err)
{
errno = EOPNOTSUPP;
return -1;
}
static int nftnl_flowtable_snprintf_default(char *buf, size_t size,
const struct nftnl_flowtable *c)
{
int ret, remain = size, offset = 0, i;
ret = snprintf(buf, remain, "flow table %s %s use %u size %u flags %x",
c->table, c->name, c->use, c->size, c->ft_flags);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
if (c->flags & (1 << NFTNL_FLOWTABLE_HOOKNUM)) {
ret = snprintf(buf + offset, remain, " hook %s prio %d ",
nftnl_hooknum2str(c->family, c->hooknum),
c->prio);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
if (c->flags & (1 << NFTNL_FLOWTABLE_DEVICES)) {
ret = snprintf(buf + offset, remain, " dev { ");
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
for (i = 0; i < c->dev_array_len; i++) {
ret = snprintf(buf + offset, remain, " %s ",
c->dev_array[i]);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
}
ret = snprintf(buf + offset, remain, " } ");
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
}
}
return offset;
}
static int nftnl_flowtable_cmd_snprintf(char *buf, size_t size,
const struct nftnl_flowtable *c,
uint32_t cmd, uint32_t type,
uint32_t flags)
{
int ret, remain = size, offset = 0;
switch (type) {
case NFTNL_OUTPUT_DEFAULT:
ret = nftnl_flowtable_snprintf_default(buf + offset, remain, c);
SNPRINTF_BUFFER_SIZE(ret, remain, offset);
break;
case NFTNL_OUTPUT_XML:
case NFTNL_OUTPUT_JSON:
break;
default:
return -1;
}
return offset;
}
EXPORT_SYMBOL(nftnl_flowtable_snprintf);
int nftnl_flowtable_snprintf(char *buf, size_t size, const struct nftnl_flowtable *c,
uint32_t type, uint32_t flags)
{
if (size)
buf[0] = '\0';
return nftnl_flowtable_cmd_snprintf(buf, size, c, nftnl_flag2cmd(flags),
type, flags);
}
static int nftnl_flowtable_do_snprintf(char *buf, size_t size, const void *c,
uint32_t cmd, uint32_t type, uint32_t flags)
{
return nftnl_flowtable_snprintf(buf, size, c, type, flags);
}
EXPORT_SYMBOL(nftnl_flowtable_fprintf);
int nftnl_flowtable_fprintf(FILE *fp, const struct nftnl_flowtable *c,
uint32_t type, uint32_t flags)
{
return nftnl_fprintf(fp, c, NFTNL_CMD_UNSPEC, type, flags,
nftnl_flowtable_do_snprintf);
}
struct nftnl_flowtable_list {
struct list_head list;
};
EXPORT_SYMBOL(nftnl_flowtable_list_alloc);
struct nftnl_flowtable_list *nftnl_flowtable_list_alloc(void)
{
struct nftnl_flowtable_list *list;
list = calloc(1, sizeof(struct nftnl_flowtable_list));
if (list == NULL)
return NULL;
INIT_LIST_HEAD(&list->list);
return list;
}
EXPORT_SYMBOL(nftnl_flowtable_list_free);
void nftnl_flowtable_list_free(struct nftnl_flowtable_list *list)
{
struct nftnl_flowtable *s, *tmp;
list_for_each_entry_safe(s, tmp, &list->list, head) {
list_del(&s->head);
nftnl_flowtable_free(s);
}
xfree(list);
}
EXPORT_SYMBOL(nftnl_flowtable_list_is_empty);
int nftnl_flowtable_list_is_empty(const struct nftnl_flowtable_list *list)
{
return list_empty(&list->list);
}
EXPORT_SYMBOL(nftnl_flowtable_list_add);
void nftnl_flowtable_list_add(struct nftnl_flowtable *s,
struct nftnl_flowtable_list *list)
{
list_add(&s->head, &list->list);
}
EXPORT_SYMBOL(nftnl_flowtable_list_add_tail);
void nftnl_flowtable_list_add_tail(struct nftnl_flowtable *s,
struct nftnl_flowtable_list *list)
{
list_add_tail(&s->head, &list->list);
}
EXPORT_SYMBOL(nftnl_flowtable_list_del);
void nftnl_flowtable_list_del(struct nftnl_flowtable *s)
{
list_del(&s->head);
}
EXPORT_SYMBOL(nftnl_flowtable_list_foreach);
int nftnl_flowtable_list_foreach(struct nftnl_flowtable_list *flowtable_list,
int (*cb)(struct nftnl_flowtable *t, void *data), void *data)
{
struct nftnl_flowtable *cur, *tmp;
int ret;
list_for_each_entry_safe(cur, tmp, &flowtable_list->list, head) {
ret = cb(cur, data);
if (ret < 0)
return ret;
}
return 0;
}
nftnl_flowtable_list
Definition: flowtable.c:673
nftnl_flowtable
Definition: flowtable.c:21