#define pr_fmt(fmt) "IPv6: " fmt
#include <linux/module.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/in.h>
#include <linux/kernel.h>
#include <linux/timer.h>
#include <linux/string.h>
#include <linux/sockios.h>
#include <linux/net.h>
#include <linux/fcntl.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/icmpv6.h>
#include <linux/netfilter_ipv6.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/udp.h>
#include <net/udplite.h>
#include <net/tcp.h>
#include <net/ping.h>
#include <net/protocol.h>
#include <net/inet_common.h>
#include <net/route.h>
#include <net/transp_v6.h>
#include <net/ip6_route.h>
#include <net/addrconf.h>
#include <net/ipv6_stubs.h>
#include <net/ndisc.h>
#ifdef CONFIG_IPV6_TUNNEL
#include <net/ip6_tunnel.h>
#endif
#include <net/calipso.h>
#include <net/seg6.h>
#include <net/rpl.h>
#include <net/compat.h>
#include <net/xfrm.h>
#include <net/ioam6.h>
#include <net/rawv6.h>
#include <net/rps.h>
#include <linux/uaccess.h>
#include <linux/mroute6.h>
#include "ip6_offload.h"
MODULE_AUTHOR("Cast of dozens");
MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
MODULE_LICENSE("GPL");
static struct list_head inetsw6[SOCK_MAX];
static DEFINE_SPINLOCK(inetsw6_lock);
struct ipv6_params ipv6_defaults = {
.disable_ipv6 = 0,
.autoconf = 1,
};
module_param_named(disable, disable_ipv6_mod, int, 0444);
MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
static struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
{
const int offset = sk->sk_prot->ipv6_pinfo_offset;
return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
}
void inet6_sock_destruct(struct sock *sk)
{
inet6_cleanup_sock(sk);
inet_sock_destruct(sk);
}
EXPORT_SYMBOL_GPL(inet6_sock_destruct);
static int inet6_create(struct net *net, struct socket *sock, int protocol,
int kern)
{
struct inet_sock *inet;
struct ipv6_pinfo *np;
struct sock *sk;
struct inet_protosw *answer;
struct proto *answer_prot;
unsigned char answer_flags;
int try_loading_module = 0;
int err;
if (protocol < 0 || protocol >= IPPROTO_MAX)
return -EINVAL;
lookup_protocol:
err = -ESOCKTNOSUPPORT;
rcu_read_lock();
list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
err = 0;
if (protocol == answer->protocol) {
if (protocol != IPPROTO_IP)
break;
} else {
if (IPPROTO_IP == protocol) {
protocol = answer->protocol;
break;
}
if (IPPROTO_IP == answer->protocol)
break;
}
err = -EPROTONOSUPPORT;
}
if (err) {
if (try_loading_module < 2) {
rcu_read_unlock();
if (++try_loading_module == 1)
request_module("net-pf-%d-proto-%d-type-%d",
PF_INET6, protocol, sock->type);
else
request_module("net-pf-%d-proto-%d",
PF_INET6, protocol);
goto lookup_protocol;
} else
goto out_rcu_unlock;
}
err = -EPERM;
if (sock->type == SOCK_RAW && !kern &&
!ns_capable(net->user_ns, CAP_NET_RAW))
goto out_rcu_unlock;
sock->ops = answer->ops;
answer_prot = answer->prot;
answer_flags = answer->flags;
rcu_read_unlock();
WARN_ON(!answer_prot->slab);
err = -ENOBUFS;
sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
if (!sk)
goto out;
sock_init_data(sock, sk);
err = 0;
if (INET_PROTOSW_REUSE & answer_flags)
sk->sk_reuse = SK_CAN_REUSE;
if (INET_PROTOSW_ICSK & answer_flags)
inet_init_csk_locks(sk);
inet = inet_sk(sk);
inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags);
if (SOCK_RAW == sock->type) {
inet->inet_num = protocol;
if (IPPROTO_RAW == protocol)
inet_set_bit(HDRINCL, sk);
}
sk->sk_destruct = inet6_sock_destruct;
sk->sk_family = PF_INET6;
sk->sk_protocol = protocol;
sk->sk_backlog_rcv = answer->prot->backlog_rcv;
inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
np->hop_limit = -1;
np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
inet6_set_bit(MC6_LOOP, sk);
inet6_set_bit(MC6_ALL, sk);
np->pmtudisc = IPV6_PMTUDISC_WANT;
inet6_assign_bit(REPFLOW, sk, READ_ONCE(net->ipv6.sysctl.flowlabel_reflect) &
FLOWLABEL_REFLECT_ESTABLISHED);
sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash);
inet->uc_ttl = -1;
inet_set_bit(MC_LOOP, sk);
inet->mc_ttl = 1;
inet->mc_index = 0;
RCU_INIT_POINTER(inet->mc_list, NULL);
inet->rcv_tos = 0;
if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
inet->pmtudisc = IP_PMTUDISC_DONT;
else
inet->pmtudisc = IP_PMTUDISC_WANT;
if (inet->inet_num) {
inet->inet_sport = htons(inet->inet_num);
err = sk->sk_prot->hash(sk);
if (err)
goto out_sk_release;
}
if (sk->sk_prot->init) {
err = sk->sk_prot->init(sk);
if (err)
goto out_sk_release;
}
if (!kern) {
err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
if (err)
goto out_sk_release;
}
out:
return err;
out_rcu_unlock:
rcu_read_unlock();
goto out;
out_sk_release:
sk_common_release(sk);
sock->sk = NULL;
goto out;
}
static int __inet6_bind(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len,
u32 flags)
{
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct net *net = sock_net(sk);
__be32 v4addr = 0;
unsigned short snum;
bool saved_ipv6only;
int addr_type = 0;
int err = 0;
if (addr->sin6_family != AF_INET6)
return -EAFNOSUPPORT;
addr_type = ipv6_addr_type(&addr->sin6_addr);
if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
return -EINVAL;
snum = ntohs(addr->sin6_port);
if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
snum && inet_port_requires_bind_service(net, snum) &&
!ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
return -EACCES;
if (flags & BIND_WITH_LOCK)
lock_sock(sk);
if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
err = -EINVAL;
goto out;
}
if (addr_type == IPV6_ADDR_MAPPED) {
struct net_device *dev = NULL;
int chk_addr_ret;
if (ipv6_only_sock(sk)) {
err = -EINVAL;
goto out;
}
rcu_read_lock();
if (sk->sk_bound_dev_if) {
dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
if (!dev) {
err = -ENODEV;
goto out_unlock;
}
}
v4addr = addr->sin6_addr.s6_addr32[3];
chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
rcu_read_unlock();
if (!inet_addr_valid_or_nonlocal(net, inet, v4addr,
chk_addr_ret)) {
err = -EADDRNOTAVAIL;
goto out;
}
} else {
if (addr_type != IPV6_ADDR_ANY) {
struct net_device *dev = NULL;
rcu_read_lock();
if (__ipv6_addr_needs_scope_id(addr_type)) {
if (addr_len >= sizeof(struct sockaddr_in6) &&
addr->sin6_scope_id) {
sk->sk_bound_dev_if = addr->sin6_scope_id;
}
if (!sk->sk_bound_dev_if) {
err = -EINVAL;
goto out_unlock;
}
}
if (sk->sk_bound_dev_if) {
dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
if (!dev) {
err = -ENODEV;
goto out_unlock;
}
}
v4addr = LOOPBACK4_IPV6;
if (!(addr_type & IPV6_ADDR_MULTICAST)) {
if (!ipv6_can_nonlocal_bind(net, inet) &&
!ipv6_chk_addr(net, &addr->sin6_addr,
dev, 0)) {
err = -EADDRNOTAVAIL;
goto out_unlock;
}
}
rcu_read_unlock();
}
}
inet->inet_rcv_saddr = v4addr;
inet->inet_saddr = v4addr;
sk->sk_v6_rcv_saddr = addr->sin6_addr;
if (!(addr_type & IPV6_ADDR_MULTICAST))
np->saddr = addr->sin6_addr;
saved_ipv6only = sk->sk_ipv6only;
if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
sk->sk_ipv6only = 1;
if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) ||
(flags & BIND_FORCE_ADDRESS_NO_PORT))) {
err = sk->sk_prot->get_port(sk, snum);
if (err) {
sk->sk_ipv6only = saved_ipv6only;
inet_reset_saddr(sk);
goto out;
}
if (!(flags & BIND_FROM_BPF)) {
err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
if (err) {
sk->sk_ipv6only = saved_ipv6only;
inet_reset_saddr(sk);
if (sk->sk_prot->put_port)
sk->sk_prot->put_port(sk);
goto out;
}
}
}
if (addr_type != IPV6_ADDR_ANY)
sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
if (snum)
sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
inet->inet_sport = htons(inet->inet_num);
inet->inet_dport = 0;
inet->inet_daddr = 0;
out:
if (flags & BIND_WITH_LOCK)
release_sock(sk);
return err;
out_unlock:
rcu_read_unlock();
goto out;
}
int inet6_bind_sk(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len)
{
u32 flags = BIND_WITH_LOCK;
const struct proto *prot;
int err = 0;
prot = READ_ONCE(sk->sk_prot);
if (prot->bind)
return prot->bind(sk, uaddr, addr_len);
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, &addr_len,
CGROUP_INET6_BIND, &flags);
if (err)
return err;
return __inet6_bind(sk, uaddr, addr_len, flags);
}
int inet6_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
{
return inet6_bind_sk(sock->sk, uaddr, addr_len);
}
EXPORT_SYMBOL(inet6_bind);
int inet6_release(struct socket *sock)
{
struct sock *sk = sock->sk;
if (!sk)
return -EINVAL;
ipv6_sock_mc_close(sk);
ipv6_sock_ac_close(sk);
return inet_release(sock);
}
EXPORT_SYMBOL(inet6_release);
void inet6_cleanup_sock(struct sock *sk)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
struct ipv6_txoptions *opt;
skb = xchg(&np->pktoptions, NULL);
kfree_skb(skb);
skb = xchg(&np->rxpmtu, NULL);
kfree_skb(skb);
fl6_free_socklist(sk);
opt = unrcu_pointer(xchg(&np->opt, NULL));
if (opt) {
atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
txopt_put(opt);
}
}
EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
int peer)
{
struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
int sin_addr_len = sizeof(*sin);
struct sock *sk = sock->sk;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
sin->sin6_family = AF_INET6;
sin->sin6_flowinfo = 0;
sin->sin6_scope_id = 0;
lock_sock(sk);
if (peer) {
if (!inet->inet_dport ||
(((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
peer == 1)) {
release_sock(sk);
return -ENOTCONN;
}
sin->sin6_port = inet->inet_dport;
sin->sin6_addr = sk->sk_v6_daddr;
if (inet6_test_bit(SNDFLOW, sk))
sin->sin6_flowinfo = np->flow_label;
BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
CGROUP_INET6_GETPEERNAME);
} else {
if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
sin->sin6_addr = np->saddr;
else
sin->sin6_addr = sk->sk_v6_rcv_saddr;
sin->sin6_port = inet->inet_sport;
BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
CGROUP_INET6_GETSOCKNAME);
}
sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
sk->sk_bound_dev_if);
release_sock(sk);
return sin_addr_len;
}
EXPORT_SYMBOL(inet6_getname);
int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
struct sock *sk = sock->sk;
struct net *net = sock_net(sk);
const struct proto *prot;
switch (cmd) {
case SIOCADDRT:
case SIOCDELRT: {
struct in6_rtmsg rtmsg;
if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
return -EFAULT;
return ipv6_route_ioctl(net, cmd, &rtmsg);
}
case SIOCSIFADDR:
return addrconf_add_ifaddr(net, argp);
case SIOCDIFADDR:
return addrconf_del_ifaddr(net, argp);
case SIOCSIFDSTADDR:
return addrconf_set_dstaddr(net, argp);
default:
prot = READ_ONCE(sk->sk_prot);
if (!prot->ioctl)
return -ENOIOCTLCMD;
return sk_ioctl(sk, cmd, (void __user *)arg);
}
return 0;
}
EXPORT_SYMBOL(inet6_ioctl);
#ifdef CONFIG_COMPAT
struct compat_in6_rtmsg {
struct in6_addr rtmsg_dst;
struct in6_addr rtmsg_src;
struct in6_addr rtmsg_gateway;
u32 rtmsg_type;
u16 rtmsg_dst_len;
u16 rtmsg_src_len;
u32 rtmsg_metric;
u32 rtmsg_info;
u32 rtmsg_flags;
s32 rtmsg_ifindex;
};
static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
struct compat_in6_rtmsg __user *ur)
{
struct in6_rtmsg rt;
if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
3 * sizeof(struct in6_addr)) ||
get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
return -EFAULT;
return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
}
int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
void __user *argp = compat_ptr(arg);
struct sock *sk = sock->sk;
switch (cmd) {
case SIOCADDRT:
case SIOCDELRT:
return inet6_compat_routing_ioctl(sk, cmd, argp);
default:
return -ENOIOCTLCMD;
}
}
EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
#endif
INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
size_t));
int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
{
struct sock *sk = sock->sk;
const struct proto *prot;
if (unlikely(inet_send_prepare(sk)))
return -EAGAIN;
prot = READ_ONCE(sk->sk_prot);
return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
sk, msg, size);
}
INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
size_t, int, int *));
int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
int flags)
{
struct sock *sk = sock->sk;
const struct proto *prot;
int addr_len = 0;
int err;
if (likely(!(flags & MSG_ERRQUEUE)))
sock_rps_record_flow(sk);
prot = READ_ONCE(sk->sk_prot);
err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
sk, msg, size, flags, &addr_len);
if (err >= 0)
msg->msg_namelen = addr_len;
return err;
}
const struct proto_ops inet6_stream_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_stream_connect,
.socketpair = sock_no_socketpair,
.accept = inet_accept,
.getname = inet6_getname,
.poll = tcp_poll,
.ioctl = inet6_ioctl,
.gettstamp = sock_gettstamp,
.listen = inet_listen,
.shutdown = inet_shutdown,
.setsockopt = sock_common_setsockopt,
.getsockopt = sock_common_getsockopt,
.sendmsg = inet6_sendmsg,
.recvmsg = inet6_recvmsg,
#ifdef CONFIG_MMU
.mmap = tcp_mmap,
#endif
.splice_eof = inet_splice_eof,
.sendmsg_locked = tcp_sendmsg_locked,
.splice_read = tcp_splice_read,
.set_peek_off = sk_set_peek_off,
.read_sock = tcp_read_sock,
.read_skb = tcp_read_skb,
.peek_len = tcp_peek_len,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
#endif
.set_rcvlowat = tcp_set_rcvlowat,
};
EXPORT_SYMBOL_GPL(inet6_stream_ops);
const struct proto_ops inet6_dgram_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_dgram_connect,
.socketpair = sock_no_socketpair,
.accept = sock_no_accept,
.getname = inet6_getname,
.poll = udp_poll,
.ioctl = inet6_ioctl,
.gettstamp = sock_gettstamp,
.listen = sock_no_listen,
.shutdown = inet_shutdown,
.setsockopt = sock_common_setsockopt,
.getsockopt = sock_common_getsockopt,
.sendmsg = inet6_sendmsg,
.recvmsg = inet6_recvmsg,
.read_skb = udp_read_skb,
.mmap = sock_no_mmap,
.set_peek_off = udp_set_peek_off,
#ifdef CONFIG_COMPAT
.compat_ioctl = inet6_compat_ioctl,
#endif
};
static const struct net_proto_family inet6_family_ops = {
.family = PF_INET6,
.create = inet6_create,
.owner = THIS_MODULE,
};
int inet6_register_protosw(struct inet_protosw *p)
{
struct list_head *lh;
struct inet_protosw *answer;
struct list_head *last_perm;
int protocol = p->protocol;
int ret;
spin_lock_bh(&inetsw6_lock);
ret = -EINVAL;
if (p->type >= SOCK_MAX)
goto out_illegal;
answer = NULL;
ret = -EPERM;
last_perm = &inetsw6[p->type];
list_for_each(lh, &inetsw6[p->type]) {
answer = list_entry(lh, struct inet_protosw, list);
if (INET_PROTOSW_PERMANENT & answer->flags) {
if (protocol == answer->protocol)
break;
last_perm = lh;
}
answer = NULL;
}
if (answer)
goto out_permanent;
list_add_rcu(&p->list, last_perm);
ret = 0;
out:
spin_unlock_bh(&inetsw6_lock);
return ret;
out_permanent:
pr_err("Attempt to override permanent protocol %d\n", protocol);
goto out;
out_illegal:
pr_err("Ignoring attempt to register invalid socket type %d\n",
p->type);
goto out;
}
EXPORT_SYMBOL(inet6_register_protosw);
void
inet6_unregister_protosw(struct inet_protosw *p)
{
if (INET_PROTOSW_PERMANENT & p->flags) {
pr_err("Attempt to unregister permanent protocol %d\n",
p->protocol);
} else {
spin_lock_bh(&inetsw6_lock);
list_del_rcu(&p->list);
spin_unlock_bh(&inetsw6_lock);
synchronize_net();
}
}
EXPORT_SYMBOL(inet6_unregister_protosw);
int inet6_sk_rebuild_header(struct sock *sk)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct inet_sock *inet = inet_sk(sk);
struct in6_addr *final_p;
struct dst_entry *dst;
struct flowi6 *fl6;
dst = __sk_dst_check(sk, np->dst_cookie);
if (dst)
return 0;
fl6 = &inet->cork.fl.u.ip6;
memset(fl6, 0, sizeof(*fl6));
fl6->flowi6_proto = sk->sk_protocol;
fl6->daddr = sk->sk_v6_daddr;
fl6->saddr = np->saddr;
fl6->flowlabel = np->flow_label;
fl6->flowi6_oif = sk->sk_bound_dev_if;
fl6->flowi6_mark = sk->sk_mark;
fl6->fl6_dport = inet->inet_dport;
fl6->fl6_sport = inet->inet_sport;
fl6->flowi6_uid = sk_uid(sk);
security_sk_classify_flow(sk, flowi6_to_flowi_common(fl6));
rcu_read_lock();
final_p = fl6_update_dst(fl6, rcu_dereference(np->opt), &np->final);
rcu_read_unlock();
dst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p);
if (IS_ERR(dst)) {
sk->sk_route_caps = 0;
WRITE_ONCE(sk->sk_err_soft, -PTR_ERR(dst));
return PTR_ERR(dst);
}
ip6_dst_store(sk, dst, false, false);
return 0;
}
bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
const struct inet6_skb_parm *opt)
{
const struct ipv6_pinfo *np = inet6_sk(sk);
if (np->rxopt.all) {
if (((opt->flags & IP6SKB_HOPBYHOP) &&
(np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
(ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
np->rxopt.bits.rxflow) ||
(opt->srcrt && (np->rxopt.bits.srcrt ||
np->rxopt.bits.osrcrt)) ||
((opt->dst1 || opt->dst0) &&
(np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
return true;
}
return false;
}
static struct packet_type ipv6_packet_type __read_mostly = {
.type = cpu_to_be16(ETH_P_IPV6),
.func = ipv6_rcv,
.list_func = ipv6_list_rcv,
};
static int __init ipv6_packet_init(void)
{
dev_add_pack(&ipv6_packet_type);
return 0;
}
static void ipv6_packet_cleanup(void)
{
dev_remove_pack(&ipv6_packet_type);
}
static int __net_init ipv6_init_mibs(struct net *net)
{
int i;
net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
if (!net->mib.udp_stats_in6)
return -ENOMEM;
net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
if (!net->mib.udplite_stats_in6)
goto err_udplite_mib;
net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
if (!net->mib.ipv6_statistics)
goto err_ip_mib;
for_each_possible_cpu(i) {
struct ipstats_mib *af_inet6_stats;
af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
u64_stats_init(&af_inet6_stats->syncp);
}
net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
if (!net->mib.icmpv6_statistics)
goto err_icmp_mib;
net->mib.icmpv6msg_statistics = kzalloc_obj(struct icmpv6msg_mib);
if (!net->mib.icmpv6msg_statistics)
goto err_icmpmsg_mib;
return 0;
err_icmpmsg_mib:
free_percpu(net->mib.icmpv6_statistics);
err_icmp_mib:
free_percpu(net->mib.ipv6_statistics);
err_ip_mib:
free_percpu(net->mib.udplite_stats_in6);
err_udplite_mib:
free_percpu(net->mib.udp_stats_in6);
return -ENOMEM;
}
static void ipv6_cleanup_mibs(struct net *net)
{
free_percpu(net->mib.udp_stats_in6);
free_percpu(net->mib.udplite_stats_in6);
free_percpu(net->mib.ipv6_statistics);
free_percpu(net->mib.icmpv6_statistics);
kfree(net->mib.icmpv6msg_statistics);
}
static int __net_init inet6_net_init(struct net *net)
{
int err = 0;
net->ipv6.sysctl.bindv6only = 0;
net->ipv6.sysctl.icmpv6_time = HZ / 10;
net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0;
net->ipv6.sysctl.icmpv6_errors_extension_mask = 0;
bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
net->ipv6.sysctl.flowlabel_consistency = 1;
net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
net->ipv6.sysctl.idgen_retries = 3;
net->ipv6.sysctl.idgen_delay = 1 * HZ;
net->ipv6.sysctl.flowlabel_state_ranges = 0;
net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
net->ipv6.sysctl.fib_notify_on_flag_change = 0;
atomic_set(&net->ipv6.fib6_sernum, 1);
net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
err = ipv6_init_mibs(net);
if (err)
return err;
#ifdef CONFIG_PROC_FS
err = udp6_proc_init(net);
if (err)
goto out;
err = tcp6_proc_init(net);
if (err)
goto proc_tcp6_fail;
err = ac6_proc_init(net);
if (err)
goto proc_ac6_fail;
#endif
return err;
#ifdef CONFIG_PROC_FS
proc_ac6_fail:
tcp6_proc_exit(net);
proc_tcp6_fail:
udp6_proc_exit(net);
out:
ipv6_cleanup_mibs(net);
return err;
#endif
}
static void __net_exit inet6_net_exit(struct net *net)
{
#ifdef CONFIG_PROC_FS
udp6_proc_exit(net);
tcp6_proc_exit(net);
ac6_proc_exit(net);
#endif
ipv6_cleanup_mibs(net);
}
static struct pernet_operations inet6_net_ops = {
.init = inet6_net_init,
.exit = inet6_net_exit,
};
static int ipv6_route_input(struct sk_buff *skb)
{
ip6_route_input(skb);
return skb_dst(skb)->error;
}
static const struct ipv6_stub ipv6_stub_impl = {
.ipv6_sock_mc_join = ipv6_sock_mc_join,
.ipv6_sock_mc_drop = ipv6_sock_mc_drop,
.ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
.ipv6_route_input = ipv6_route_input,
.fib6_get_table = fib6_get_table,
.fib6_table_lookup = fib6_table_lookup,
.fib6_lookup = fib6_lookup,
.fib6_select_path = fib6_select_path,
.ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
.fib6_nh_init = fib6_nh_init,
.fib6_nh_release = fib6_nh_release,
.fib6_nh_release_dsts = fib6_nh_release_dsts,
.fib6_update_sernum = fib6_update_sernum_stub,
.fib6_rt_update = fib6_rt_update,
.ip6_del_rt = ip6_del_rt,
.udpv6_encap_enable = udpv6_encap_enable,
.ndisc_send_na = ndisc_send_na,
#if IS_ENABLED(CONFIG_XFRM)
.xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
.xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
.xfrm6_gro_udp_encap_rcv = xfrm6_gro_udp_encap_rcv,
.xfrm6_rcv_encap = xfrm6_rcv_encap,
#endif
.nd_tbl = &nd_tbl,
.ipv6_fragment = ip6_fragment,
.ipv6_dev_find = ipv6_dev_find,
.ip6_xmit = ip6_xmit,
};
static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
.inet6_bind = __inet6_bind,
.udp6_lib_lookup = __udp6_lib_lookup,
.ipv6_setsockopt = do_ipv6_setsockopt,
.ipv6_getsockopt = do_ipv6_getsockopt,
.ipv6_dev_get_saddr = ipv6_dev_get_saddr,
};
static int __init inet6_init(void)
{
struct list_head *r;
int err = 0;
sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
INIT_LIST_HEAD(r);
raw_hashinfo_init(&raw_v6_hashinfo);
if (disable_ipv6_mod) {
pr_info("Loaded, but administratively disabled, reboot required to enable\n");
goto out;
}
err = proto_register(&tcpv6_prot, 1);
if (err)
goto out;
err = proto_register(&udpv6_prot, 1);
if (err)
goto out_unregister_tcp_proto;
err = proto_register(&udplitev6_prot, 1);
if (err)
goto out_unregister_udp_proto;
err = proto_register(&rawv6_prot, 1);
if (err)
goto out_unregister_udplite_proto;
err = proto_register(&pingv6_prot, 1);
if (err)
goto out_unregister_raw_proto;
err = rawv6_init();
if (err)
goto out_unregister_ping_proto;
err = sock_register(&inet6_family_ops);
if (err)
goto out_sock_register_fail;
err = register_pernet_subsys(&inet6_net_ops);
if (err)
goto register_pernet_fail;
err = ip6_mr_init();
if (err)
goto ipmr_fail;
err = icmpv6_init();
if (err)
goto icmp_fail;
err = ndisc_init();
if (err)
goto ndisc_fail;
err = igmp6_init();
if (err)
goto igmp_fail;
err = ipv6_netfilter_init();
if (err)
goto netfilter_fail;
#ifdef CONFIG_PROC_FS
err = -ENOMEM;
if (raw6_proc_init())
goto proc_raw6_fail;
if (udplite6_proc_init())
goto proc_udplite6_fail;
if (ipv6_misc_proc_init())
goto proc_misc6_fail;
if (if6_proc_init())
goto proc_if6_fail;
#endif
err = ip6_route_init();
if (err)
goto ip6_route_fail;
err = ndisc_late_init();
if (err)
goto ndisc_late_fail;
err = ip6_flowlabel_init();
if (err)
goto ip6_flowlabel_fail;
err = ipv6_anycast_init();
if (err)
goto ipv6_anycast_fail;
err = addrconf_init();
if (err)
goto addrconf_fail;
err = ipv6_exthdrs_init();
if (err)
goto ipv6_exthdrs_fail;
err = ipv6_frag_init();
if (err)
goto ipv6_frag_fail;
err = udpv6_init();
if (err)
goto udpv6_fail;
err = udplitev6_init();
if (err)
goto udplitev6_fail;
err = udpv6_offload_init();
if (err)
goto udpv6_offload_fail;
err = tcpv6_init();
if (err)
goto tcpv6_fail;
err = ipv6_packet_init();
if (err)
goto ipv6_packet_fail;
err = pingv6_init();
if (err)
goto pingv6_fail;
err = calipso_init();
if (err)
goto calipso_fail;
err = seg6_init();
if (err)
goto seg6_fail;
err = rpl_init();
if (err)
goto rpl_fail;
err = ioam6_init();
if (err)
goto ioam6_fail;
err = igmp6_late_init();
if (err)
goto igmp6_late_err;
#ifdef CONFIG_SYSCTL
err = ipv6_sysctl_register();
if (err)
goto sysctl_fail;
#endif
wmb();
ipv6_stub = &ipv6_stub_impl;
ipv6_bpf_stub = &ipv6_bpf_stub_impl;
out:
return err;
#ifdef CONFIG_SYSCTL
sysctl_fail:
igmp6_late_cleanup();
#endif
igmp6_late_err:
ioam6_exit();
ioam6_fail:
rpl_exit();
rpl_fail:
seg6_exit();
seg6_fail:
calipso_exit();
calipso_fail:
pingv6_exit();
pingv6_fail:
ipv6_packet_cleanup();
ipv6_packet_fail:
tcpv6_exit();
tcpv6_fail:
udpv6_offload_exit();
udpv6_offload_fail:
udplitev6_exit();
udplitev6_fail:
udpv6_exit();
udpv6_fail:
ipv6_frag_exit();
ipv6_frag_fail:
ipv6_exthdrs_exit();
ipv6_exthdrs_fail:
addrconf_cleanup();
addrconf_fail:
ipv6_anycast_cleanup();
ipv6_anycast_fail:
ip6_flowlabel_cleanup();
ip6_flowlabel_fail:
ndisc_late_cleanup();
ndisc_late_fail:
ip6_route_cleanup();
ip6_route_fail:
#ifdef CONFIG_PROC_FS
if6_proc_exit();
proc_if6_fail:
ipv6_misc_proc_exit();
proc_misc6_fail:
udplite6_proc_exit();
proc_udplite6_fail:
raw6_proc_exit();
proc_raw6_fail:
#endif
ipv6_netfilter_fini();
netfilter_fail:
igmp6_cleanup();
igmp_fail:
ndisc_cleanup();
ndisc_fail:
icmpv6_cleanup();
icmp_fail:
ip6_mr_cleanup();
ipmr_fail:
unregister_pernet_subsys(&inet6_net_ops);
register_pernet_fail:
sock_unregister(PF_INET6);
rtnl_unregister_all(PF_INET6);
out_sock_register_fail:
rawv6_exit();
out_unregister_ping_proto:
proto_unregister(&pingv6_prot);
out_unregister_raw_proto:
proto_unregister(&rawv6_prot);
out_unregister_udplite_proto:
proto_unregister(&udplitev6_prot);
out_unregister_udp_proto:
proto_unregister(&udpv6_prot);
out_unregister_tcp_proto:
proto_unregister(&tcpv6_prot);
goto out;
}
module_init(inet6_init);
MODULE_ALIAS_NETPROTO(PF_INET6);
