Release 4.11 net/ipv6/af_inet6.c
/*
* PF_INET6 socket protocol family
* Linux INET6 implementation
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
* Adapted from linux/net/ipv4/af_inet.c
*
* Fixes:
* piggy, Karl Knutson : Socket protocol table
* Hideaki YOSHIFUJI : sin6_scope_id support
* Arnaldo Melo : check proc_net_create return, cleanups
*
* 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.
*/
#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/ndisc.h>
#ifdef CONFIG_IPV6_TUNNEL
#include <net/ip6_tunnel.h>
#endif
#include <net/calipso.h>
#include <net/seg6.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");
/* The inetsw6 table contains everything that inet6_create needs to
* build a new socket.
*/
static struct list_head inetsw6[SOCK_MAX];
static DEFINE_SPINLOCK(inetsw6_lock);
struct ipv6_params ipv6_defaults = {
.disable_ipv6 = 0,
.autoconf = 1,
};
static int disable_ipv6_mod;
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");
bool ipv6_mod_enabled(void)
{
return disable_ipv6_mod == 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
David Ahern | 12 | 100.00% | 1 | 100.00% |
Total | 12 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
{
const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
}
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;
/* Look for the requested type/protocol pair. */
lookup_protocol:
err = -ESOCKTNOSUPPORT;
rcu_read_lock();
list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
err = 0;
/* Check the non-wild match. */
if (protocol == answer->protocol) {
if (protocol != IPPROTO_IP)
break;
} else {
/* Check for the two wild cases. */
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();
/*
* Be more specific, e.g. net-pf-10-proto-132-type-1
* (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
*/
if (++try_loading_module == 1)
request_module("net-pf-%d-proto-%d-type-%d",
PF_INET6, protocol, sock->type);
/*
* Fall back to generic, e.g. net-pf-10-proto-132
* (net-pf-PF_INET6-proto-IPPROTO_SCTP)
*/
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;
inet = inet_sk(sk);
inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
if (SOCK_RAW == sock->type) {
inet->inet_num = protocol;
if (IPPROTO_RAW == protocol)
inet->hdrincl = 1;
}
sk->sk_destruct = inet_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;
np->mc_loop = 1;
np->pmtudisc = IPV6_PMTUDISC_WANT;
np->autoflowlabel = ip6_default_np_autolabel(sock_net(sk));
sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
/* Init the ipv4 part of the socket since we can have sockets
* using v6 API for ipv4.
*/
inet->uc_ttl = -1;
inet->mc_loop = 1;
inet->mc_ttl = 1;
inet->mc_index = 0;
inet->mc_list = NULL;
inet->rcv_tos = 0;
if (net->ipv4.sysctl_ip_no_pmtu_disc)
inet->pmtudisc = IP_PMTUDISC_DONT;
else
inet->pmtudisc = IP_PMTUDISC_WANT;
/*
* Increment only the relevant sk_prot->socks debug field, this changes
* the previous behaviour of incrementing both the equivalent to
* answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
*
* This allows better debug granularity as we'll know exactly how many
* UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
* transport protocol socks. -acme
*/
sk_refcnt_debug_inc(sk);
if (inet->inet_num) {
/* It assumes that any protocol which allows
* the user to assign a number at socket
* creation time automatically shares.
*/
inet->inet_sport = htons(inet->inet_num);
err = sk->sk_prot->hash(sk);
if (err) {
sk_common_release(sk);
goto out;
}
}
if (sk->sk_prot->init) {
err = sk->sk_prot->init(sk);
if (err) {
sk_common_release(sk);
goto out;
}
}
if (!kern) {
err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
if (err) {
sk_common_release(sk);
goto out;
}
}
out:
return err;
out_rcu_unlock:
rcu_read_unlock();
goto out;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 196 | 30.62% | 10 | 20.41% |
Arnaldo Carvalho de Melo | 99 | 15.47% | 6 | 12.24% |
Linus Torvalds | 81 | 12.66% | 1 | 2.04% |
Hideaki Yoshifuji / 吉藤英明 | 79 | 12.34% | 4 | 8.16% |
David S. Miller | 46 | 7.19% | 4 | 8.16% |
David Ahern | 28 | 4.38% | 1 | 2.04% |
Hannes Frederic Sowa | 18 | 2.81% | 2 | 4.08% |
Craig Gallek | 16 | 2.50% | 1 | 2.04% |
Eric W. Biedermann | 14 | 2.19% | 3 | 6.12% |
Tom Herbert | 12 | 1.88% | 1 | 2.04% |
Eric Paris | 11 | 1.72% | 3 | 6.12% |
Paul E. McKenney | 7 | 1.09% | 1 | 2.04% |
Jiri Benc | 6 | 0.94% | 1 | 2.04% |
Eric Dumazet | 6 | 0.94% | 2 | 4.08% |
Stephen Hemminger | 5 | 0.78% | 1 | 2.04% |
Daniel Lezcano | 5 | 0.78% | 1 | 2.04% |
Paul Moore | 4 | 0.62% | 2 | 4.08% |
Pavel Emelyanov | 3 | 0.47% | 2 | 4.08% |
Ian Morris | 2 | 0.31% | 1 | 2.04% |
Ilpo Järvinen | 1 | 0.16% | 1 | 2.04% |
Al Viro | 1 | 0.16% | 1 | 2.04% |
Total | 640 | 100.00% | 49 | 100.00% |
/* bind for INET6 API */
int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
{
struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
struct sock *sk = sock->sk;
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;
int addr_type = 0;
int err = 0;
/* If the socket has its own bind function then use it. */
if (sk->sk_prot->bind)
return sk->sk_prot->bind(sk, uaddr, addr_len);
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
if (addr->sin6_family != AF_INET6)
return -EAFNOSUPPORT;
addr_type = ipv6_addr_type(&addr->sin6_addr);
if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
return -EINVAL;
snum = ntohs(addr->sin6_port);
if (snum && snum < inet_prot_sock(net) &&
!ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
return -EACCES;
lock_sock(sk);
/* Check these errors (active socket, double bind). */
if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
err = -EINVAL;
goto out;
}
/* Check if the address belongs to the host. */
if (addr_type == IPV6_ADDR_MAPPED) {
int chk_addr_ret;
/* Binding to v4-mapped address on a v6-only socket
* makes no sense
*/
if (sk->sk_ipv6only) {
err = -EINVAL;
goto out;
}
/* Reproduce AF_INET checks to make the bindings consistent */
v4addr = addr->sin6_addr.s6_addr32[3];
chk_addr_ret = inet_addr_type(net, v4addr);
if (!net->ipv4.sysctl_ip_nonlocal_bind &&
!(inet->freebind || inet->transparent) &&
v4addr != htonl(INADDR_ANY) &&
chk_addr_ret != RTN_LOCAL &&
chk_addr_ret != RTN_MULTICAST &&
chk_addr_ret != RTN_BROADCAST) {
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) {
/* Override any existing binding, if another one
* is supplied by user.
*/
sk->sk_bound_dev_if = addr->sin6_scope_id;
}
/* Binding to link-local address requires an interface */
if (!sk->sk_bound_dev_if) {
err = -EINVAL;
goto out_unlock;
}
dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
if (!dev) {
err = -ENODEV;
goto out_unlock;
}
}
/* ipv4 addr of the socket is invalid. Only the
* unspecified and mapped address have a v4 equivalent.
*/
v4addr = LOOPBACK4_IPV6;
if (!(addr_type & IPV6_ADDR_MULTICAST)) {
if (!net->ipv6.sysctl.ip_nonlocal_bind &&
!(inet->freebind || inet->transparent) &&
!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;
/* Make sure we are allowed to bind here. */
if ((snum || !inet->bind_address_no_port) &&
sk->sk_prot->get_port(sk, snum)) {
inet_reset_saddr(sk);
err = -EADDRINUSE;
goto out;
}
if (addr_type != IPV6_ADDR_ANY) {
sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
if (addr_type != IPV6_ADDR_MAPPED)
sk->sk_ipv6only = 1;
}
if (snum)
sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
inet->inet_sport = htons(inet->inet_num);
inet->inet_dport = 0;
inet->inet_daddr = 0;
out:
release_sock(sk);
return err;
out_unlock:
rcu_read_unlock();
goto out;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 285 | 44.60% | 8 | 19.05% |
Ville Nuorvala | 134 | 20.97% | 2 | 4.76% |
Vladislav Yasevich | 65 | 10.17% | 3 | 7.14% |
Eric Dumazet | 39 | 6.10% | 5 | 11.90% |
David S. Miller | 27 | 4.23% | 2 | 4.76% |
Arnaldo Carvalho de Melo | 12 | 1.88% | 3 | 7.14% |
Marcus Meissner | 12 | 1.88% | 2 | 4.76% |
Benjamin Thery | 10 | 1.56% | 1 | 2.38% |
Tom Herbert | 9 | 1.41% | 1 | 2.38% |
Eric W. Biedermann | 7 | 1.10% | 3 | 7.14% |
Bruno Prémont | 7 | 1.10% | 1 | 2.38% |
Maciej Żenczykowski | 6 | 0.94% | 1 | 2.38% |
Balazs Scheidler | 5 | 0.78% | 1 | 2.38% |
Vincent Bernat | 4 | 0.63% | 1 | 2.38% |
Krister Johansen | 4 | 0.63% | 1 | 2.38% |
Hannes Frederic Sowa | 3 | 0.47% | 1 | 2.38% |
Hideaki Yoshifuji / 吉藤英明 | 3 | 0.47% | 1 | 2.38% |
Alexey Dobriyan | 2 | 0.31% | 1 | 2.38% |
Al Viro | 2 | 0.31% | 2 | 4.76% |
Daniel Lezcano | 2 | 0.31% | 1 | 2.38% |
Uwe Kleine-König | 1 | 0.16% | 1 | 2.38% |
Total | 639 | 100.00% | 42 | 100.00% |
EXPORT_SYMBOL(inet6_bind);
int inet6_release(struct socket *sock)
{
struct sock *sk = sock->sk;
if (!sk)
return -EINVAL;
/* Free mc lists */
ipv6_sock_mc_close(sk);
/* Free ac lists */
ipv6_sock_ac_close(sk);
return inet_release(sock);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 39 | 84.78% | 2 | 50.00% |
David L Stevens | 6 | 13.04% | 1 | 25.00% |
Ian Morris | 1 | 2.17% | 1 | 25.00% |
Total | 46 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(inet6_release);
void inet6_destroy_sock(struct sock *sk)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
struct ipv6_txoptions *opt;
/* Release rx options */
skb = xchg(&np->pktoptions, NULL);
if (skb)
kfree_skb(skb);
skb = xchg(&np->rxpmtu, NULL);
if (skb)
kfree_skb(skb);
/* Free flowlabels */
fl6_free_socklist(sk);
/* Free tx options */
opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
if (opt) {
atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
txopt_put(opt);
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 60 | 49.18% | 2 | 28.57% |
Eric Dumazet | 20 | 16.39% | 1 | 14.29% |
Brian Haley | 18 | 14.75% | 2 | 28.57% |
David S. Miller | 12 | 9.84% | 1 | 14.29% |
Eldad Zack | 12 | 9.84% | 1 | 14.29% |
Total | 122 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL_GPL(inet6_destroy_sock);
/*
* This does both peername and sockname.
*/
int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
int *uaddr_len, int peer)
{
struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
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;
if (peer) {
if (!inet->inet_dport)
return -ENOTCONN;
if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
peer == 1)
return -ENOTCONN;
sin->sin6_port = inet->inet_dport;
sin->sin6_addr = sk->sk_v6_daddr;
if (np->sndflow)
sin->sin6_flowinfo = np->flow_label;
} 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;
}
sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
sk->sk_bound_dev_if);
*uaddr_len = sizeof(*sin);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 172 | 78.18% | 6 | 40.00% |
David S. Miller | 25 | 11.36% | 2 | 13.33% |
Eric Dumazet | 9 | 4.09% | 2 | 13.33% |
Hannes Frederic Sowa | 7 | 3.18% | 1 | 6.67% |
Arnaldo Carvalho de Melo | 3 | 1.36% | 2 | 13.33% |
Alexey Dobriyan | 3 | 1.36% | 1 | 6.67% |
Hideaki Yoshifuji / 吉藤英明 | 1 | 0.45% | 1 | 6.67% |
Total | 220 | 100.00% | 15 | 100.00% |
EXPORT_SYMBOL(inet6_getname);
int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct sock *sk = sock->sk;
struct net *net = sock_net(sk);
switch (cmd) {
case SIOCGSTAMP:
return sock_get_timestamp(sk, (struct timeval __user *)arg);
case SIOCGSTAMPNS:
return sock_get_timestampns(sk, (struct timespec __user *)arg);
case SIOCADDRT:
case SIOCDELRT:
return ipv6_route_ioctl(net, cmd, (void __user *)arg);
case SIOCSIFADDR:
return addrconf_add_ifaddr(net, (void __user *) arg);
case SIOCDIFADDR:
return addrconf_del_ifaddr(net, (void __user *) arg);
case SIOCSIFDSTADDR:
return addrconf_set_dstaddr(net, (void __user *) arg);
default:
if (!sk->sk_prot->ioctl)
return -ENOIOCTLCMD;
return sk->sk_prot->ioctl(sk, cmd, arg);
}
/*NOTREACHED*/
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 124 | 69.66% | 3 | 25.00% |
Eric Dumazet | 17 | 9.55% | 1 | 8.33% |
Daniel Lezcano | 15 | 8.43% | 2 | 16.67% |
Christoph Hellwig | 6 | 3.37% | 1 | 8.33% |
Andi Kleen | 5 | 2.81% | 1 | 8.33% |
Al Viro | 4 | 2.25% | 1 | 8.33% |
Arnaldo Carvalho de Melo | 3 | 1.69% | 1 | 8.33% |
Hideaki Yoshifuji / 吉藤英明 | 3 | 1.69% | 1 | 8.33% |
Linus Torvalds | 1 | 0.56% | 1 | 8.33% |
Total | 178 | 100.00% | 12 | 100.00% |
EXPORT_SYMBOL(inet6_ioctl);
const struct proto_ops inet6_stream_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_stream_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = inet_accept, /* ok */
.getname = inet6_getname,
.poll = tcp_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
.listen = inet_listen, /* ok */
.shutdown = inet_shutdown, /* ok */
.setsockopt = sock_common_setsockopt, /* ok */
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = inet_recvmsg, /* ok */
.mmap = sock_no_mmap,
.sendpage = inet_sendpage,
.splice_read = tcp_splice_read,
.read_sock = tcp_read_sock,
.peek_len = tcp_peek_len,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
#endif
};
const struct proto_ops inet6_dgram_ops = {
.family = PF_INET6,
.owner = THIS_MODULE,
.release = inet6_release,
.bind = inet6_bind,
.connect = inet_dgram_connect, /* ok */
.socketpair = sock_no_socketpair, /* a do nothing */
.accept = sock_no_accept, /* a do nothing */
.getname = inet6_getname,
.poll = udp_poll, /* ok */
.ioctl = inet6_ioctl, /* must change */
.listen = sock_no_listen, /* ok */
.shutdown = inet_shutdown, /* ok */
.setsockopt = sock_common_setsockopt, /* ok */
.getsockopt = sock_common_getsockopt, /* ok */
.sendmsg = inet_sendmsg, /* ok */
.recvmsg = inet_recvmsg, /* ok */
.mmap = sock_no_mmap,
.sendpage = sock_no_sendpage,
.set_peek_off = sk_set_peek_off,
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
#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;
/* If we are trying to override a permanent protocol, bail. */
answer = NULL;
ret = -EPERM;
last_perm = &inetsw6[p->type];
list_for_each(lh, &inetsw6[p->type]) {
answer = list_entry(lh, struct inet_protosw, list);
/* Check only the non-wild match. */
if (INET_PROTOSW_PERMANENT & answer->flags) {
if (protocol == answer->protocol)
break;
last_perm = lh;
}
answer = NULL;
}
if (answer)
goto out_permanent;
/* Add the new entry after the last permanent entry if any, so that
* the new entry does not override a permanent entry when matched with
* a wild-card protocol. But it is allowed to override any existing
* non-permanent entry. This means that when we remove this entry, the
* system automatically returns to the old behavior.
*/
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;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds | 120 | 65.22% | 1 | 14.29% |
Sridhar Samudrala | 26 | 14.13% | 1 | 14.29% |
Daniel Lezcano | 25 | 13.59% | 1 | 14.29% |
Stephen Hemminger | 7 | 3.80% | 1 | 14.29% |
Joe Perches | 4 | 2.17% | 1 | 14.29% |
Patrick McHardy | 1 | 0.54% | 1 | 14.29% |
Hideaki Yoshifuji / 吉藤英明 | 1 | 0.54% | 1 | 14.29% |
Total | 184 | 100.00% | 7 | 100.00% |
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();
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Stephen Hemminger | 39 | 70.91% | 2 | 50.00% |
Linus Torvalds | 14 | 25.45% | 1 | 25.00% |
Joe Perches | 2 | 3.64% | 1 | 25.00% |
Total | 55 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(inet6_unregister_protosw);
int inet6_sk_rebuild_header(struct sock *sk)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct dst_entry *dst;
dst = __sk_dst_check(sk, np->dst_cookie);
if (!dst) {
struct inet_sock *inet = inet_sk(sk);
struct in6_addr *final_p, final;
struct flowi6 fl6;
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->sk_uid;
security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
rcu_read_lock();
final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
&final);
rcu_read_unlock();
dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
if (IS_ERR(dst)) {
sk->sk_route_caps = 0;
sk->sk_err_soft = -PTR_ERR(dst);
return PTR_ERR(dst);
}
ip6_dst_store(sk, dst, NULL, NULL);
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Arnaldo Carvalho de Melo | 147 | 61.00% | 1 | 6.67% |
David S. Miller | 48 | 19.92% | 3 | 20.00% |
Eric Dumazet | 14 | 5.81% | 4 | 26.67% |
Lorenzo Colitti | 8 | 3.32% | 1 | 6.67% |
Venkat Yekkirala | 7 | 2.90% | 1 | 6.67% |
Arnaud Ebalard | 7 | 2.90% | 1 | 6.67% |
Brian Haley | 5 | 2.07% | 1 | 6.67% |
Hideaki Yoshifuji / 吉藤英明 | 2 | 0.83% | 1 | 6.67% |
Alexey Dobriyan | 2 | 0.83% | 1 | 6.67% |
Ian Morris | 1 | 0.41% | 1 | 6.67% |
Total | 241 | 100.00% | 15 | 100.00% |
EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
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)