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natflow_path.c
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natflow_path.c
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/*
* Author: Chen Minqiang <[email protected]>
* Date : Mon, 14 May 2018 14:49:40 +0800
*/
#include <linux/ctype.h>
#include <linux/device.h>
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/in6.h>
#include <linux/inetdevice.h>
#include <linux/netfilter.h>
#include <linux/skbuff.h>
#include <linux/string.h>
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/version.h>
#include <linux/netfilter.h>
#include <linux/netfilter_bridge.h>
#include <net/ipv6.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_extend.h>
#include <net/netfilter/nf_conntrack_acct.h>
#include <linux/if_pppox.h>
#include <linux/ppp_defs.h>
#if (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
#include <net/netfilter/nf_flow_table.h>
#endif
#include "natflow_common.h"
#include "natflow_path.h"
#include "natflow_user.h"
#ifndef ARPHRD_RAWIP
#define ARPHRD_RAWIP 519
#endif
static inline struct net_device *vlan_find_dev_rcu(struct net_device *real_dev,
__be16 vlan_proto, u16 vlan_id)
{
if (real_dev->vlan_info)
return __vlan_find_dev_deep_rcu(real_dev, vlan_proto, vlan_id);
return NULL;
}
#define fastnat_for_all 0
#define fastnat_ifname_group_only 1
#define fastnat_ifname_group_bypass 2
int ifname_group_type = fastnat_for_all;
int ifname_group_add(const unsigned char *ifname)
{
int ret = -ENOENT;
struct net_device *dev;
rcu_read_lock();
dev = first_net_device(&init_net);
while (dev) {
if (strncmp(dev->name, ifname, IFNAMSIZ) == 0) {
dev->flags |= IFF_IFNAME_GROUP;
NATFLOW_println("Success ifname_group_add %s", ifname);
ret = 0;
break;
}
dev = next_net_device(dev);
}
rcu_read_unlock();
return ret;
}
void ifname_group_clear(void)
{
struct net_device *dev = NULL;
rcu_read_lock();
dev = first_net_device(&init_net);
while (dev) {
if ((dev->flags & IFF_IFNAME_GROUP)) {
dev->flags &= ~IFF_IFNAME_GROUP;
}
dev = next_net_device(dev);
}
rcu_read_unlock();
}
struct net_device *ifname_group_get(int idx)
{
int idx_cnt = 0;
struct net_device *dev = NULL;
rcu_read_lock();
dev = first_net_device(&init_net);
while (dev) {
if ((dev->flags & IFF_IFNAME_GROUP)) {
idx_cnt++;
if (idx_cnt == idx + 1) {
dev_hold(dev);
break;
}
}
dev = next_net_device(dev);
}
rcu_read_unlock();
return dev;
}
#if (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
unsigned short hwnat = 1;
#if defined(CONFIG_NET_MEDIATEK_SOC_WED)
unsigned short hwnat_wed_disabled = 0;
#else
unsigned short hwnat_wed_disabled = 1;
#endif
#endif
unsigned int delay_pkts = 0;
unsigned int go_slowpath_if_no_qos = 0;
static int disabled = 1;
void natflow_disabled_set(int v)
{
disabled = v;
}
int natflow_disabled_get(void)
{
return disabled;
}
static unsigned short natflow_path_magic = 0;
void natflow_update_magic(int init)
{
if (init) {
natflow_path_magic = jiffies + get_random_u32();
} else {
natflow_path_magic++;
}
}
#ifdef CONFIG_NETFILTER_INGRESS
static natflow_fastnat_node_t *natflow_fast_nat_table = NULL;
static inline void natflow_update_ct_timeout(struct nf_conn *ct, unsigned long extra_jiffies)
{
if (!nf_ct_is_confirmed(ct)) {
/* nothing to do */
} else {
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0)
extra_jiffies += ct->timeout.expires;
if (extra_jiffies - ct->timeout.expires >= HZ) {
mod_timer_pending(&ct->timeout, extra_jiffies);
}
#else
extra_jiffies += ct->timeout;
ct->timeout = extra_jiffies;
#endif
}
}
static inline natflow_fastnat_node_t *nfn_invert_get(natflow_fastnat_node_t *nfn) {
unsigned int hash;
unsigned long diff_jiffies;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_tuple_hash *h;
memset(&tuple, 0, sizeof(tuple));
tuple.src.u3.ip = nfn->saddr;
tuple.src.u.all = nfn->source;
tuple.dst.u3.ip = nfn->daddr;
tuple.dst.u.all = nfn->dest;
tuple.src.l3num = PF_INET;
tuple.dst.protonum = NFN_PROTO_DEC(nfn->flags);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
h = nf_conntrack_find_get(&init_net, NF_CT_DEFAULT_ZONE, &tuple);
#else
h = nf_conntrack_find_get(&init_net, &nf_ct_zone_dflt, &tuple);
#endif
if (h) {
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
int d = !NF_CT_DIRECTION(h);
__be32 saddr = ct->tuplehash[d].tuple.src.u3.ip;
__be32 daddr = ct->tuplehash[d].tuple.dst.u3.ip;
__be16 source = ct->tuplehash[d].tuple.src.u.all;
__be16 dest = ct->tuplehash[d].tuple.dst.u.all;
__be16 protonum = ct->tuplehash[d].tuple.dst.protonum;
hash = natflow_hash_v4(saddr, daddr, source, dest);
nfn = &natflow_fast_nat_table[hash];
if (nfn->saddr != saddr || nfn->daddr != daddr ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (nfn->saddr != saddr || nfn->daddr != daddr ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
if (nfn->saddr != saddr || nfn->daddr != daddr ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#endif
diff_jiffies = ulongmindiff(jiffies, nfn->jiffies);
if (nfn->magic == natflow_path_magic &&
(u32)diff_jiffies < NATFLOW_FF_TIMEOUT_LOW &&
nfn->saddr == saddr && nfn->daddr == daddr &&
nfn->source == source && nfn->dest == dest &&
NFN_PROTO_DEC(nfn->flags) == protonum) {
nf_ct_put(ct);
return nfn;
}
nf_ct_put(ct);
}
return NULL;
}
static inline natflow_fastnat_node_t *nfn_invert_get6(natflow_fastnat_node_t *nfn) {
unsigned int hash;
unsigned long diff_jiffies;
struct nf_conntrack_tuple tuple;
struct nf_conntrack_tuple_hash *h;
memset(&tuple, 0, sizeof(tuple));
memcpy(tuple.src.u3.ip6, nfn->saddr6, 16);
tuple.src.u.all = nfn->source;
memcpy(tuple.dst.u3.ip6, nfn->daddr6, 16);
tuple.dst.u.all = nfn->dest;
tuple.src.l3num = AF_INET6;
tuple.dst.protonum = NFN_PROTO_DEC(nfn->flags);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
h = nf_conntrack_find_get(&init_net, NF_CT_DEFAULT_ZONE, &tuple);
#else
h = nf_conntrack_find_get(&init_net, &nf_ct_zone_dflt, &tuple);
#endif
if (h) {
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
int d = !NF_CT_DIRECTION(h);
struct in6_addr saddr = ct->tuplehash[d].tuple.src.u3.in6;
struct in6_addr daddr = ct->tuplehash[d].tuple.dst.u3.in6;
__be16 source = ct->tuplehash[d].tuple.src.u.all;
__be16 dest = ct->tuplehash[d].tuple.dst.u.all;
__be16 protonum = ct->tuplehash[d].tuple.dst.protonum;
hash = natflow_hash_v6(saddr.s6_addr32, daddr.s6_addr32, source, dest);
nfn = &natflow_fast_nat_table[hash];
if (memcmp(nfn->saddr6, saddr.s6_addr32, 16) || memcmp(nfn->daddr6, daddr.s6_addr32, 16) ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (memcmp(nfn->saddr6, saddr.s6_addr32, 16) || memcmp(nfn->daddr6, daddr.s6_addr32, 16) ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
if (memcmp(nfn->saddr6, saddr.s6_addr32, 16) || memcmp(nfn->daddr6, daddr.s6_addr32, 16) ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#endif
diff_jiffies = ulongmindiff(jiffies, nfn->jiffies);
if (nfn->magic == natflow_path_magic &&
(u32)diff_jiffies < NATFLOW_FF_TIMEOUT_LOW &&
memcmp(nfn->saddr6, saddr.s6_addr32, 16) == 0 && memcmp(nfn->daddr6, daddr.s6_addr32, 16) == 0 &&
nfn->source == source && nfn->dest == dest &&
NFN_PROTO_DEC(nfn->flags) == protonum) {
nf_ct_put(ct);
return nfn;
}
nf_ct_put(ct);
}
return NULL;
}
static int natflow_offload_keepalive(unsigned int hash, unsigned long bytes, unsigned long packets, unsigned int *speed_bytes, unsigned int *speed_packets, int hw, unsigned long current_jiffies)
{
struct nf_conn_acct *acct;
natflow_fastnat_node_t *nfn, *nfn_i = NULL;
unsigned long diff_jiffies = 0;
hash = hash % NATFLOW_FASTNAT_TABLE_SIZE;
nfn = &natflow_fast_nat_table[hash];
diff_jiffies = ulongmindiff(current_jiffies, nfn->jiffies);
if (nfn->magic == natflow_path_magic && (u32)diff_jiffies < NATFLOW_FF_TIMEOUT_LOW) {
struct nf_conntrack_tuple tuple;
struct nf_conntrack_tuple_hash *h;
nfn->jiffies = current_jiffies;
memset(&tuple, 0, sizeof(tuple));
if (NFN_L3NUM_DEC(nfn->flags) == AF_INET6) {
goto __keepalive_ipv6_main;
}
tuple.src.u3.ip = nfn->saddr;
tuple.src.u.all = nfn->source;
tuple.dst.u3.ip = nfn->daddr;
tuple.dst.u.all = nfn->dest;
tuple.src.l3num = PF_INET;
tuple.dst.protonum = NFN_PROTO_DEC(nfn->flags);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
h = nf_conntrack_find_get(&init_net, NF_CT_DEFAULT_ZONE, &tuple);
#else
h = nf_conntrack_find_get(&init_net, &nf_ct_zone_dflt, &tuple);
#endif
if (h) {
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
int d = !NF_CT_DIRECTION(h);
__be32 saddr = ct->tuplehash[d].tuple.src.u3.ip;
__be32 daddr = ct->tuplehash[d].tuple.dst.u3.ip;
__be16 source = ct->tuplehash[d].tuple.src.u.all;
__be16 dest = ct->tuplehash[d].tuple.dst.u.all;
__be16 protonum = ct->tuplehash[d].tuple.dst.protonum;
if (d == 1) {
diff_jiffies = ulongmindiff(current_jiffies, nfn->keepalive_jiffies);
nfn->keepalive_jiffies = current_jiffies;
NATFLOW_INFO("keepalive[%u] nfn[%pI4:%u->%pI4:%u] ct%d diff_jiffies=%u HZ=%u bytes=%lu hw=%d\n",
hash, &nfn->saddr, ntohs(nfn->source), &nfn->daddr, ntohs(nfn->dest), !d, (unsigned int)diff_jiffies, HZ, bytes, hw);
natflow_update_ct_timeout(ct, diff_jiffies);
}
nfn_i = nfn;
hash = natflow_hash_v4(saddr, daddr, source, dest);
nfn = &natflow_fast_nat_table[hash];
if (nfn->saddr != saddr || nfn->daddr != daddr ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (nfn->saddr != saddr || nfn->daddr != daddr ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
if (nfn->saddr != saddr || nfn->daddr != daddr ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#endif
diff_jiffies = ulongmindiff(current_jiffies, nfn->jiffies);
if ((u32)diff_jiffies < NATFLOW_FF_TIMEOUT_LOW &&
nfn->saddr == saddr && nfn->daddr == daddr &&
nfn->source == source && nfn->dest == dest &&
NFN_PROTO_DEC(nfn->flags) == protonum) {
nfn->jiffies = current_jiffies;
if (d == 0) {
diff_jiffies = ulongmindiff(current_jiffies, nfn->keepalive_jiffies);
nfn->keepalive_jiffies = current_jiffies;
NATFLOW_INFO("keepalive[%u] nfn[%pI4:%u->%pI4:%u] ct%d diff_jiffies=%u HZ=%u bytes=%lu hw=%d\n",
hash, &nfn->saddr, ntohs(nfn->source), &nfn->daddr, ntohs(nfn->dest), !d, (unsigned int)diff_jiffies, HZ, bytes, hw);
natflow_update_ct_timeout(ct, diff_jiffies);
}
}
acct = nf_conn_acct_find(ct);
if (acct) {
struct nf_conn_counter *counter = acct->counter;
atomic64_add(packets, &counter[!d].packets);
atomic64_add(bytes, &counter[!d].bytes);
}
/* stats to net_device */
do {
struct natflow_t *nf;
nf = natflow_session_get(ct);
if (nf) {
struct net_device *dev;
dev = nf->rroute[!d].outdev;
#if (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (hw && (((nf->status & NF_FF_ORIGINAL_DSA) && d == NF_FF_DIR_REPLY) ||
((nf->status & NF_FF_REPLY_DSA) && d == NF_FF_DIR_ORIGINAL))) {
struct net_device_stats *stats = &dev->stats;
stats->tx_bytes += bytes;
stats->tx_packets += packets;
}
#endif
if (nf->rroute[!d].vlan_present) {
dev = vlan_lookup_dev(dev, nf->rroute[!d].vlan_tci);
if (dev) {
struct vlan_pcpu_stats *vpstats = this_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats);
u64_stats_update_begin(&vpstats->syncp);
compat_u64_stats_add(&vpstats->tx_bytes, bytes);
compat_u64_stats_add(&vpstats->tx_packets, packets);
u64_stats_update_end(&vpstats->syncp);
}
}
dev = nf->rroute[d].outdev;
#if (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (hw && (((nf->status & NF_FF_ORIGINAL_DSA) && (!d) == NF_FF_DIR_REPLY) ||
((nf->status & NF_FF_REPLY_DSA) && (!d) == NF_FF_DIR_ORIGINAL))) {
struct net_device_stats *stats = &dev->stats;
stats->rx_bytes += bytes;
stats->rx_packets += packets;
}
#endif
if (nf->rroute[d].vlan_present) {
dev = vlan_lookup_dev(dev, nf->rroute[d].vlan_tci);
if (dev) {
struct vlan_pcpu_stats *vpstats = this_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats);
u64_stats_update_begin(&vpstats->syncp);
compat_u64_stats_add(&vpstats->rx_bytes, bytes);
compat_u64_stats_add(&vpstats->rx_packets, packets);
u64_stats_update_end(&vpstats->syncp);
}
}
}
} while(0);
/* stats to user */
do {
unsigned int hw_speed_bytes[4] = {0, 0, 0, 0};
unsigned int hw_speed_packets[4] = {0, 0, 0, 0};
natflow_fakeuser_t *user;
struct fakeuser_data_t *fud;
user = natflow_user_get(ct);
if (NULL == user) {
break;
}
if (user->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip != ct->tuplehash[!d].tuple.src.u3.ip)
d = 0; /* download */
else
d = 1; /* upload */
acct = nf_conn_acct_find(user);
if (acct) {
struct nf_conn_counter *counter = acct->counter;
atomic64_add(packets, &counter[d].packets);
atomic64_add(bytes, &counter[d].bytes);
}
if (hw == 2 && !speed_bytes) {
unsigned int i = ((unsigned int)current_jiffies/HZ/2) % 4;
unsigned int per_i = (unsigned int)current_jiffies % (HZ * 2);
speed_bytes = hw_speed_bytes;
speed_packets = hw_speed_packets;
speed_bytes[i] = bytes * per_i / (HZ * 2);
speed_packets[i] = packets * per_i / (HZ * 2);
i = (i + 3) % 4;
speed_bytes[i] = bytes * (HZ * 2 - per_i + 1) / (HZ * 2);
speed_packets[i] = packets * (HZ * 2 - per_i + 1) / (HZ * 2);
}
if (!speed_bytes) {
break;
}
fud = natflow_fakeuser_data(user);
if (d == 0) {
unsigned int rx_speed_jiffies = atomic_xchg(&fud->rx_speed_jiffies, (unsigned int)current_jiffies);
unsigned int i = ((unsigned int)current_jiffies/HZ/2) % 4;
unsigned int j = (rx_speed_jiffies/HZ/2) % 4;
int diff = 0;
diff_jiffies = uintmindiff(current_jiffies, rx_speed_jiffies);
if (diff_jiffies >= HZ * 2 * 4) {
for(j = 0; j < 4; j++) {
atomic_set(&fud->rx_speed_bytes[j], 0);
atomic_set(&fud->rx_speed_packets[j], 0);
}
j = i;
}
for (; j != i; ) {
diff++;
j = (j + 1) % 4;
atomic_set(&fud->rx_speed_bytes[j], speed_bytes[j]);
atomic_set(&fud->rx_speed_packets[j], speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
for (; diff < 4; diff++) {
j = (j + 1) % 4;
atomic_add(speed_bytes[j], &fud->rx_speed_bytes[j]);
atomic_add(speed_packets[j], &fud->rx_speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
} else {
unsigned int tx_speed_jiffies = atomic_xchg(&fud->tx_speed_jiffies, (unsigned int)current_jiffies);
unsigned int i = ((unsigned int)current_jiffies/HZ/2) % 4;
unsigned int j = (tx_speed_jiffies/HZ/2) % 4;
int diff = 0;
diff_jiffies = uintmindiff(current_jiffies, tx_speed_jiffies);
if (diff_jiffies >= HZ * 2 * 4) {
for(j = 0; j < 4; j++) {
atomic_set(&fud->tx_speed_bytes[j], 0);
atomic_set(&fud->tx_speed_packets[j], 0);
}
j = i;
}
for (; j != i; ) {
diff++;
j = (j + 1) % 4;
atomic_set(&fud->tx_speed_bytes[j], speed_bytes[j]);
atomic_set(&fud->tx_speed_packets[j], speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
for (; diff < 4; diff++) {
j = (j + 1) % 4;
atomic_add(speed_bytes[j], &fud->tx_speed_bytes[j]);
atomic_add(speed_packets[j], &fud->tx_speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
}
if (fud->auth_status == AUTH_BLOCK) {
struct natflow_t *nf;
nf = natflow_session_get(ct);
/* tell FF do not emit pkts */
if (nf && !(nf->status & NF_FF_USER_USE)) {
/* tell FF -user- need to use this conn */
simple_set_bit(NF_FF_USER_USE_BIT, &nf->status);
}
clear_bit(IPS_NATFLOW_USER_BYPASS_BIT, &ct->status);
nfn->jiffies = jiffies - NATFLOW_FF_TIMEOUT_HIGH;
nfn_i->jiffies = jiffies - NATFLOW_FF_TIMEOUT_HIGH;
NATFLOW_INFO("keepalive[%u] nfn[%pI4:%u->%pI4:%u] diff_jiffies=%u user is AUTH_BLOCK\n",
hash, &nfn->saddr, ntohs(nfn->source), &nfn->daddr, ntohs(nfn->dest), (unsigned int)diff_jiffies);
nf_ct_put(ct);
return -1;
}
} while (0);
nf_ct_put(ct);
return 0;
}
NATFLOW_INFO("keepalive[%u] nfn[%pI4:%u->%pI4:%u] diff_jiffies=%u ct not found\n",
hash, &nfn->saddr, ntohs(nfn->source), &nfn->daddr, ntohs(nfn->dest), (unsigned int)diff_jiffies);
nfn->jiffies = jiffies - NATFLOW_FF_TIMEOUT_HIGH;
return -1;
__keepalive_ipv6_main:
memcpy(tuple.src.u3.ip6, nfn->saddr6, 16);
tuple.src.u.all = nfn->source;
memcpy(tuple.dst.u3.ip6, nfn->daddr6, 16);
tuple.dst.u.all = nfn->dest;
tuple.src.l3num = AF_INET6;
tuple.dst.protonum = NFN_PROTO_DEC(nfn->flags);
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 3, 0)
h = nf_conntrack_find_get(&init_net, NF_CT_DEFAULT_ZONE, &tuple);
#else
h = nf_conntrack_find_get(&init_net, &nf_ct_zone_dflt, &tuple);
#endif
if (h) {
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
int d = !NF_CT_DIRECTION(h);
struct in6_addr saddr = ct->tuplehash[d].tuple.src.u3.in6;
struct in6_addr daddr = ct->tuplehash[d].tuple.dst.u3.in6;
__be16 source = ct->tuplehash[d].tuple.src.u.all;
__be16 dest = ct->tuplehash[d].tuple.dst.u.all;
__be16 protonum = ct->tuplehash[d].tuple.dst.protonum;
if (d == 1) {
diff_jiffies = ulongmindiff(current_jiffies, nfn->keepalive_jiffies);
nfn->keepalive_jiffies = current_jiffies;
NATFLOW_INFO("keepalive[%u] nfn[%pI6.%u->%pI6.%u] ct%d diff_jiffies=%u HZ=%u bytes=%lu hw=%d\n",
hash, nfn->saddr6, ntohs(nfn->source), nfn->daddr6, ntohs(nfn->dest), !d, (unsigned int)diff_jiffies, HZ, bytes, hw);
natflow_update_ct_timeout(ct, diff_jiffies);
}
nfn_i = nfn;
hash = natflow_hash_v6(saddr.s6_addr32, daddr.s6_addr32, source, dest);
nfn = &natflow_fast_nat_table[hash];
if (memcmp(nfn->saddr6, saddr.s6_addr32, 16) || memcmp(nfn->daddr6, daddr.s6_addr32, 16) ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (memcmp(nfn->saddr6, saddr.s6_addr32, 16) || memcmp(nfn->daddr6, daddr.s6_addr32, 16) ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
if (memcmp(nfn->saddr6, saddr.s6_addr32, 16) || memcmp(nfn->daddr6, daddr.s6_addr32, 16) ||
nfn->source != source || nfn->dest != dest ||
NFN_PROTO_DEC(nfn->flags) != protonum) {
hash += 1;
nfn = &natflow_fast_nat_table[hash];
}
#endif
diff_jiffies = ulongmindiff(current_jiffies, nfn->jiffies);
if ((u32)diff_jiffies < NATFLOW_FF_TIMEOUT_LOW &&
memcmp(nfn->saddr6, saddr.s6_addr32, 16) == 0 && memcmp(nfn->daddr6, daddr.s6_addr32, 16) == 0 &&
nfn->source == source && nfn->dest == dest &&
NFN_PROTO_DEC(nfn->flags) == protonum) {
nfn->jiffies = current_jiffies;
if (d == 0) {
diff_jiffies = ulongmindiff(current_jiffies, nfn->keepalive_jiffies);
nfn->keepalive_jiffies = current_jiffies;
NATFLOW_INFO("keepalive[%u] nfn[%pI6.%u->%pI6.%u] ct%d diff_jiffies=%u HZ=%u bytes=%lu hw=%d\n",
hash, nfn->saddr6, ntohs(nfn->source), nfn->daddr6, ntohs(nfn->dest), !d, (unsigned int)diff_jiffies, HZ, bytes, hw);
natflow_update_ct_timeout(ct, diff_jiffies);
}
}
acct = nf_conn_acct_find(ct);
if (acct) {
struct nf_conn_counter *counter = acct->counter;
atomic64_add(packets, &counter[!d].packets);
atomic64_add(bytes, &counter[!d].bytes);
}
/* stats to net_device */
do {
struct natflow_t *nf;
nf = natflow_session_get(ct);
if (nf) {
struct net_device *dev;
dev = nf->rroute[!d].outdev;
#if (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (hw && (((nf->status & NF_FF_ORIGINAL_DSA) && d == NF_FF_DIR_REPLY) ||
((nf->status & NF_FF_REPLY_DSA) && d == NF_FF_DIR_ORIGINAL))) {
struct net_device_stats *stats = &dev->stats;
stats->tx_bytes += bytes;
stats->tx_packets += packets;
}
#endif
if (nf->rroute[!d].vlan_present) {
dev = vlan_lookup_dev(dev, nf->rroute[!d].vlan_tci);
if (dev) {
struct vlan_pcpu_stats *vpstats = this_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats);
u64_stats_update_begin(&vpstats->syncp);
compat_u64_stats_add(&vpstats->tx_bytes, bytes);
compat_u64_stats_add(&vpstats->tx_packets, packets);
u64_stats_update_end(&vpstats->syncp);
}
}
dev = nf->rroute[d].outdev;
#if (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (hw && (((nf->status & NF_FF_ORIGINAL_DSA) && (!d) == NF_FF_DIR_REPLY) ||
((nf->status & NF_FF_REPLY_DSA) && (!d) == NF_FF_DIR_ORIGINAL))) {
struct net_device_stats *stats = &dev->stats;
stats->rx_bytes += bytes;
stats->rx_packets += packets;
}
#endif
if (nf->rroute[d].vlan_present) {
dev = vlan_lookup_dev(dev, nf->rroute[d].vlan_tci);
if (dev) {
struct vlan_pcpu_stats *vpstats = this_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats);
u64_stats_update_begin(&vpstats->syncp);
compat_u64_stats_add(&vpstats->rx_bytes, bytes);
compat_u64_stats_add(&vpstats->rx_packets, packets);
u64_stats_update_end(&vpstats->syncp);
}
}
}
} while(0);
/* stats to user */
do {
unsigned int hw_speed_bytes[4] = {0, 0, 0, 0};
unsigned int hw_speed_packets[4] = {0, 0, 0, 0};
natflow_fakeuser_t *user;
struct fakeuser_data_t *fud;
user = natflow_user_get(ct);
if (NULL == user) {
break;
}
if (memcmp(&user->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3, &ct->tuplehash[!d].tuple.src.u3, sizeof(union nf_inet_addr)) != 0)
d = 0; /* download */
else
d = 1; /* upload */
acct = nf_conn_acct_find(user);
if (acct) {
struct nf_conn_counter *counter = acct->counter;
atomic64_add(packets, &counter[d].packets);
atomic64_add(bytes, &counter[d].bytes);
}
if (hw == 2 && !speed_bytes) {
unsigned int i = ((unsigned int)current_jiffies/HZ/2) % 4;
unsigned int per_i = (unsigned int)current_jiffies % (HZ * 2);
speed_bytes = hw_speed_bytes;
speed_packets = hw_speed_packets;
speed_bytes[i] = bytes * per_i / (HZ * 2);
speed_packets[i] = packets * per_i / (HZ * 2);
i = (i + 3) % 4;
speed_bytes[i] = bytes * (HZ * 2 - per_i + 1) / (HZ * 2);
speed_packets[i] = packets * (HZ * 2 - per_i + 1) / (HZ * 2);
}
if (!speed_bytes) {
break;
}
fud = natflow_fakeuser_data(user);
if (d == 0) {
unsigned int rx_speed_jiffies = atomic_xchg(&fud->rx_speed_jiffies, (unsigned int)current_jiffies);
unsigned int i = ((unsigned int)current_jiffies/HZ/2) % 4;
unsigned int j = (rx_speed_jiffies/HZ/2) % 4;
int diff = 0;
diff_jiffies = uintmindiff(current_jiffies, rx_speed_jiffies);
if (diff_jiffies >= HZ * 2 * 4) {
for(j = 0; j < 4; j++) {
atomic_set(&fud->rx_speed_bytes[j], 0);
atomic_set(&fud->rx_speed_packets[j], 0);
}
j = i;
}
for (; j != i; ) {
diff++;
j = (j + 1) % 4;
atomic_set(&fud->rx_speed_bytes[j], speed_bytes[j]);
atomic_set(&fud->rx_speed_packets[j], speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
for (; diff < 4; diff++) {
j = (j + 1) % 4;
atomic_add(speed_bytes[j], &fud->rx_speed_bytes[j]);
atomic_add(speed_packets[j], &fud->rx_speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
} else {
unsigned int tx_speed_jiffies = atomic_xchg(&fud->tx_speed_jiffies, (unsigned int)current_jiffies);
unsigned int i = ((unsigned int)current_jiffies/HZ/2) % 4;
unsigned int j = (tx_speed_jiffies/HZ/2) % 4;
int diff = 0;
diff_jiffies = uintmindiff(current_jiffies, tx_speed_jiffies);
if (diff_jiffies >= HZ * 2 * 4) {
for(j = 0; j < 4; j++) {
atomic_set(&fud->tx_speed_bytes[j], 0);
atomic_set(&fud->tx_speed_packets[j], 0);
}
j = i;
}
for (; j != i; ) {
diff++;
j = (j + 1) % 4;
atomic_set(&fud->tx_speed_bytes[j], speed_bytes[j]);
atomic_set(&fud->tx_speed_packets[j], speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
for (; diff < 4; diff++) {
j = (j + 1) % 4;
atomic_add(speed_bytes[j], &fud->tx_speed_bytes[j]);
atomic_add(speed_packets[j], &fud->tx_speed_packets[j]);
speed_bytes[j] = speed_packets[j] = 0;
}
}
if (fud->auth_status == AUTH_BLOCK) {
struct natflow_t *nf;
nf = natflow_session_get(ct);
/* tell FF do not emit pkts */
if (nf && !(nf->status & NF_FF_USER_USE)) {
/* tell FF -user- need to use this conn */
simple_set_bit(NF_FF_USER_USE_BIT, &nf->status);
}
clear_bit(IPS_NATFLOW_USER_BYPASS_BIT, &ct->status);
nfn->jiffies = jiffies - NATFLOW_FF_TIMEOUT_HIGH;
nfn_i->jiffies = jiffies - NATFLOW_FF_TIMEOUT_HIGH;
NATFLOW_INFO("keepalive[%u] nfn[%pI6.%u->%pI6.%u] diff_jiffies=%u ct not found\n",
hash, nfn->saddr6, ntohs(nfn->source), nfn->daddr6, ntohs(nfn->dest), (unsigned int)diff_jiffies);
nf_ct_put(ct);
return -1;
}
} while (0);
nf_ct_put(ct);
return 0;
}
NATFLOW_INFO("keepalive[%u] nfn[%pI6.%u->%pI6.%u] diff_jiffies=%u ct not found\n",
hash, nfn->saddr6, ntohs(nfn->source), nfn->daddr6, ntohs(nfn->dest), (unsigned int)diff_jiffies);
nfn->jiffies = jiffies - NATFLOW_FF_TIMEOUT_HIGH;
return -1;
}
if (NFN_L3NUM_DEC(nfn->flags) == AF_INET6) {
NATFLOW_INFO("keepalive[%u] nfn[%pI6.%u->%pI6.%u] diff_jiffies=%u timeout\n",
hash, nfn->saddr6, ntohs(nfn->source), nfn->daddr6, ntohs(nfn->dest), (unsigned int)diff_jiffies);
} else {
NATFLOW_INFO("keepalive[%u] nfn[%pI4:%u->%pI4:%u] diff_jiffies=%u timeout\n",
hash, &nfn->saddr, ntohs(nfn->source), &nfn->daddr, ntohs(nfn->dest), (unsigned int)diff_jiffies);
}
return -2;
}
#if (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
static struct net_device *ppe_dev = NULL;
#if defined(NATFLOW_OFFLOAD_HWNAT_FAKE)
#else
typedef struct flow_offload flow_offload_t;
typedef struct flow_offload_tuple flow_offload_tuple_t;
typedef struct flow_offload_hw_path flow_offload_hw_path_t;
typedef enum flow_offload_type flow_offload_type_t;
#endif
struct natflow_offload {
flow_offload_t flow;
};
static struct natflow_offload *natflow_offload_alloc(struct nf_conn *ct, natflow_t *nf)
{
static struct natflow_offload natflow_offload[NR_CPUS];
int dir;
flow_offload_tuple_t *ft;
struct nf_conntrack_tuple *ctt;
struct natflow_offload *natflow = &natflow_offload[smp_processor_id()];
flow_offload_t *flow = &natflow->flow;
int orig_hash, reply_hash;
natflow_fastnat_node_t *nfn;
dir = 0;
ft = &flow->tuplehash[dir].tuple;
ctt = &ct->tuplehash[dir].tuple;
if (ctt->src.l3num == AF_INET) {
ft->src_v4 = ctt->src.u3.in;
ft->dst_v4 = ctt->dst.u3.in;
} else {
ft->src_v6 = ctt->src.u3.in6;
ft->dst_v6 = ctt->dst.u3.in6;
}
ft->l3proto = ctt->src.l3num;
ft->l4proto = ctt->dst.protonum;
ft->src_port = ctt->src.u.all;
ft->dst_port = ctt->dst.u.all;
if (ctt->src.l3num == AF_INET) {
orig_hash = natflow_hash_v4(ft->src_v4.s_addr, ft->dst_v4.s_addr, ft->src_port, ft->dst_port);
nfn = &natflow_fast_nat_table[orig_hash];
if (nfn->saddr != ft->src_v4.s_addr || nfn->daddr != ft->dst_v4.s_addr ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
orig_hash += 1;
nfn = &natflow_fast_nat_table[orig_hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (nfn->saddr != ft->src_v4.s_addr || nfn->daddr != ft->dst_v4.s_addr ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
orig_hash += 1;
nfn = &natflow_fast_nat_table[orig_hash];
}
if (nfn->saddr != ft->src_v4.s_addr || nfn->daddr != ft->dst_v4.s_addr ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
orig_hash += 1;
nfn = &natflow_fast_nat_table[orig_hash];
}
#endif
} else {
orig_hash = natflow_hash_v6(ft->src_v6.s6_addr32, ft->dst_v6.s6_addr32, ft->src_port, ft->dst_port);
nfn = &natflow_fast_nat_table[orig_hash];
if (memcmp(nfn->saddr6, ft->src_v6.s6_addr32, 16) || memcmp(nfn->daddr6, ft->dst_v6.s6_addr32, 16) ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
orig_hash += 1;
nfn = &natflow_fast_nat_table[orig_hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (memcmp(nfn->saddr6, ft->src_v6.s6_addr32, 16) || memcmp(nfn->daddr6, ft->dst_v6.s6_addr32, 16) ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
orig_hash += 1;
nfn = &natflow_fast_nat_table[orig_hash];
}
if (memcmp(nfn->saddr6, ft->src_v6.s6_addr32, 16) || memcmp(nfn->daddr6, ft->dst_v6.s6_addr32, 16) ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
orig_hash += 1;
nfn = &natflow_fast_nat_table[orig_hash];
}
#endif
}
dir = 1;
ft = &flow->tuplehash[dir].tuple;
ctt = &ct->tuplehash[dir].tuple;
if (ctt->src.l3num == AF_INET) {
ft->src_v4 = ctt->src.u3.in;
ft->dst_v4 = ctt->dst.u3.in;
} else {
ft->src_v6 = ctt->src.u3.in6;
ft->dst_v6 = ctt->dst.u3.in6;
}
ft->l3proto = ctt->src.l3num;
ft->l4proto = ctt->dst.protonum;
ft->src_port = ctt->src.u.all;
ft->dst_port = ctt->dst.u.all;
if (ctt->src.l3num == AF_INET) {
reply_hash = natflow_hash_v4(ft->src_v4.s_addr, ft->dst_v4.s_addr, ft->src_port, ft->dst_port);
nfn = &natflow_fast_nat_table[reply_hash];
if (nfn->saddr != ft->src_v4.s_addr || nfn->daddr != ft->dst_v4.s_addr ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
reply_hash += 1;
nfn = &natflow_fast_nat_table[reply_hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (nfn->saddr != ft->src_v4.s_addr || nfn->daddr != ft->dst_v4.s_addr ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
reply_hash += 1;
nfn = &natflow_fast_nat_table[reply_hash];
}
if (nfn->saddr != ft->src_v4.s_addr || nfn->daddr != ft->dst_v4.s_addr ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
reply_hash += 1;
nfn = &natflow_fast_nat_table[reply_hash];
}
#endif
} else {
reply_hash = natflow_hash_v6(ft->src_v6.s6_addr32, ft->dst_v6.s6_addr32, ft->src_port, ft->dst_port);
nfn = &natflow_fast_nat_table[reply_hash];
if (memcmp(nfn->saddr6, ft->src_v6.s6_addr32, 16) || memcmp(nfn->daddr6, ft->dst_v6.s6_addr32, 16) ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
reply_hash += 1;
nfn = &natflow_fast_nat_table[reply_hash];
}
#if (defined(CONFIG_PINCTRL_MT7988) || defined(CONFIG_PINCTRL_MT7986) || defined(CONFIG_PINCTRL_MT7981)) && (defined(CONFIG_NET_RALINK_OFFLOAD) || defined(NATFLOW_OFFLOAD_HWNAT_FAKE) && defined(CONFIG_NET_MEDIATEK_SOC))
if (memcmp(nfn->saddr6, ft->src_v6.s6_addr32, 16) || memcmp(nfn->daddr6, ft->dst_v6.s6_addr32, 16) ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
reply_hash += 1;
nfn = &natflow_fast_nat_table[reply_hash];
}
if (memcmp(nfn->saddr6, ft->src_v6.s6_addr32, 16) || memcmp(nfn->daddr6, ft->dst_v6.s6_addr32, 16) ||
nfn->source != ft->src_port || nfn->dest != ft->dst_port ||
NFN_PROTO_DEC(nfn->flags) != ft->l4proto)
{
reply_hash += 1;
nfn = &natflow_fast_nat_table[reply_hash];
}
#endif
}
/*XXX: in fact ppe don't care flags */
flow->flags = 0;
if ((void *)flow->priv != (void *)natflow_offload_keepalive) {
flow->priv = (void *)natflow_offload_keepalive;
}
flow->timeout = (orig_hash << 16) | reply_hash;
return natflow;
}
#endif
#endif
void natflow_session_learn(struct sk_buff *skb, struct nf_conn *ct, natflow_t *nf, int dir)
{
int magic = natflow_path_magic;
struct iphdr *iph = ip_hdr(skb);
struct net_device *dev;
if (!skb->dev) {
return;
}
dev = skb->dev;
#ifdef CONFIG_NETFILTER_INGRESS
if (netif_is_bridge_master(dev) ||
netif_is_ovs_master(dev) ||
netif_is_bond_master(dev) ||
netif_is_macvlan(dev)) {
return;
}
if (dev->type == ARPHRD_PPP) {
if ((dev->flags & IFF_PPPOE))
return;
if (*(__be16 *)((void *)ip_hdr(skb) - 2) == __constant_htons(PPP_IP) || *(__be16 *)((void *)ip_hdr(skb) - 2) == __constant_htons(PPP_IPV6))
return;
}
#endif
if (nf->magic != magic) {
simple_clear_bit(NF_FF_ORIGINAL_CHECK_BIT, &nf->status);