Release 4.11 net/ipv6/datagram.c
/*
* common UDP/RAW code
* Linux INET6 implementation
*
* Authors:
* Pedro Roque <roque@di.fc.ul.pt>
*
* 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.
*/
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/in6.h>
#include <linux/ipv6.h>
#include <linux/route.h>
#include <linux/slab.h>
#include <linux/export.h>
#include <net/ipv6.h>
#include <net/ndisc.h>
#include <net/addrconf.h>
#include <net/transp_v6.h>
#include <net/ip6_route.h>
#include <net/tcp_states.h>
#include <net/dsfield.h>
#include <linux/errqueue.h>
#include <linux/uaccess.h>
static bool ipv6_mapped_addr_any(const struct in6_addr *a)
{
return ipv6_addr_v4mapped(a) && (a->s6_addr32[3] == 0);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Max Matveev | 28 | 96.55% | 1 | 50.00% |
Eric Dumazet | 1 | 3.45% | 1 | 50.00% |
Total | 29 | 100.00% | 2 | 100.00% |
static void ip6_datagram_flow_key_init(struct flowi6 *fl6, struct sock *sk)
{
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
memset(fl6, 0, sizeof(*fl6));
fl6->flowi6_proto = sk->sk_protocol;
fl6->daddr = sk->sk_v6_daddr;
fl6->saddr = np->saddr;
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->flowlabel = np->flow_label;
fl6->flowi6_uid = sk->sk_uid;
if (!fl6->flowi6_oif)
fl6->flowi6_oif = np->sticky_pktinfo.ipi6_ifindex;
if (!fl6->flowi6_oif && ipv6_addr_is_multicast(&fl6->daddr))
fl6->flowi6_oif = np->mcast_oif;
security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin KaFai Lau | 134 | 78.36% | 1 | 20.00% |
Hideaki Yoshifuji / 吉藤英明 | 27 | 15.79% | 1 | 20.00% |
Lorenzo Colitti | 8 | 4.68% | 1 | 20.00% |
Arnaldo Carvalho de Melo | 1 | 0.58% | 1 | 20.00% |
Eric Dumazet | 1 | 0.58% | 1 | 20.00% |
Total | 171 | 100.00% | 5 | 100.00% |
int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr)
{
struct ip6_flowlabel *flowlabel = NULL;
struct in6_addr *final_p, final;
struct ipv6_txoptions *opt;
struct dst_entry *dst;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct flowi6 fl6;
int err = 0;
if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) {
flowlabel = fl6_sock_lookup(sk, np->flow_label);
if (!flowlabel)
return -EINVAL;
}
ip6_datagram_flow_key_init(&fl6, sk);
rcu_read_lock();
opt = flowlabel ? flowlabel->opt : rcu_dereference(np->opt);
final_p = fl6_update_dst(&fl6, opt, &final);
rcu_read_unlock();
dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
if (IS_ERR(dst)) {
err = PTR_ERR(dst);
goto out;
}
if (fix_sk_saddr) {
if (ipv6_addr_any(&np->saddr))
np->saddr = fl6.saddr;
if (ipv6_addr_any(&sk->sk_v6_rcv_saddr)) {
sk->sk_v6_rcv_saddr = fl6.saddr;
inet->inet_rcv_saddr = LOOPBACK4_IPV6;
if (sk->sk_prot->rehash)
sk->sk_prot->rehash(sk);
}
}
ip6_dst_store(sk, dst,
ipv6_addr_equal(&fl6.daddr, &sk->sk_v6_daddr) ?
&sk->sk_v6_daddr : NULL,
#ifdef CONFIG_IPV6_SUBTREES
ipv6_addr_equal(&fl6.saddr, &np->saddr) ?
&np->saddr :
#endif
NULL);
out:
fl6_sock_release(flowlabel);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin KaFai Lau | 172 | 56.58% | 2 | 16.67% |
Hideaki Yoshifuji / 吉藤英明 | 96 | 31.58% | 1 | 8.33% |
Eric Dumazet | 23 | 7.57% | 3 | 25.00% |
Arnaud Ebalard | 3 | 0.99% | 1 | 8.33% |
Kazunori Miyazawa | 3 | 0.99% | 1 | 8.33% |
David S. Miller | 2 | 0.66% | 1 | 8.33% |
Hannes Frederic Sowa | 2 | 0.66% | 1 | 8.33% |
Brian Haley | 2 | 0.66% | 1 | 8.33% |
Max Matveev | 1 | 0.33% | 1 | 8.33% |
Total | 304 | 100.00% | 12 | 100.00% |
void ip6_datagram_release_cb(struct sock *sk)
{
struct dst_entry *dst;
if (ipv6_addr_v4mapped(&sk->sk_v6_daddr))
return;
rcu_read_lock();
dst = __sk_dst_get(sk);
if (!dst || !dst->obsolete ||
dst->ops->check(dst, inet6_sk(sk)->dst_cookie)) {
rcu_read_unlock();
return;
}
rcu_read_unlock();
ip6_datagram_dst_update(sk, false);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Martin KaFai Lau | 63 | 80.77% | 1 | 33.33% |
Hideaki Yoshifuji / 吉藤英明 | 14 | 17.95% | 1 | 33.33% |
Brian Haley | 1 | 1.28% | 1 | 33.33% |
Total | 78 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(ip6_datagram_release_cb);
int __ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
struct sockaddr_in6 *usin = (struct sockaddr_in6 *) uaddr;
struct inet_sock *inet = inet_sk(sk);
struct ipv6_pinfo *np = inet6_sk(sk);
struct in6_addr *daddr;
int addr_type;
int err;
__be32 fl6_flowlabel = 0;
if (usin->sin6_family == AF_INET) {
if (__ipv6_only_sock(sk))
return -EAFNOSUPPORT;
err = __ip4_datagram_connect(sk, uaddr, addr_len);
goto ipv4_connected;
}
if (addr_len < SIN6_LEN_RFC2133)
return -EINVAL;
if (usin->sin6_family != AF_INET6)
return -EAFNOSUPPORT;
if (np->sndflow)
fl6_flowlabel = usin->sin6_flowinfo & IPV6_FLOWINFO_MASK;
if (ipv6_addr_any(&usin->sin6_addr)) {
/*
* connect to self
*/
if (ipv6_addr_v4mapped(&sk->sk_v6_rcv_saddr))
ipv6_addr_set_v4mapped(htonl(INADDR_LOOPBACK),
&usin->sin6_addr);
else
usin->sin6_addr = in6addr_loopback;
}
addr_type = ipv6_addr_type(&usin->sin6_addr);
daddr = &usin->sin6_addr;
if (addr_type & IPV6_ADDR_MAPPED) {
struct sockaddr_in sin;
if (__ipv6_only_sock(sk)) {
err = -ENETUNREACH;
goto out;
}
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = daddr->s6_addr32[3];
sin.sin_port = usin->sin6_port;
err = __ip4_datagram_connect(sk,
(struct sockaddr *) &sin,
sizeof(sin));
ipv4_connected:
if (err)
goto out;
ipv6_addr_set_v4mapped(inet->inet_daddr, &sk->sk_v6_daddr);
if (ipv6_addr_any(&np->saddr) ||
ipv6_mapped_addr_any(&np->saddr))
ipv6_addr_set_v4mapped(inet->inet_saddr, &np->saddr);
if (ipv6_addr_any(&sk->sk_v6_rcv_saddr) ||
ipv6_mapped_addr_any(&sk->sk_v6_rcv_saddr)) {
ipv6_addr_set_v4mapped(inet->inet_rcv_saddr,
&sk->sk_v6_rcv_saddr);
if (sk->sk_prot->rehash)
sk->sk_prot->rehash(sk);
}
goto out;
}
if (__ipv6_addr_needs_scope_id(addr_type)) {
if (addr_len >= sizeof(struct sockaddr_in6) &&
usin->sin6_scope_id) {
if (sk->sk_bound_dev_if &&
sk->sk_bound_dev_if != usin->sin6_scope_id) {
err = -EINVAL;
goto out;
}
sk->sk_bound_dev_if = usin->sin6_scope_id;
}
if (!sk->sk_bound_dev_if && (addr_type & IPV6_ADDR_MULTICAST))
sk->sk_bound_dev_if = np->mcast_oif;
/* Connect to link-local address requires an interface */
if (!sk->sk_bound_dev_if) {
err = -EINVAL;
goto out;
}
}
sk->sk_v6_daddr = *daddr;
np->flow_label = fl6_flowlabel;
inet->inet_dport = usin->sin6_port;
/*
* Check for a route to destination an obtain the
* destination cache for it.
*/
err = ip6_datagram_dst_update(sk, true);
if (err)
goto out;
sk->sk_state = TCP_ESTABLISHED;
sk_set_txhash(sk);
out:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Hideaki Yoshifuji / 吉藤英明 | 374 | 71.10% | 2 | 7.41% |
Jonathan T. Leighton | 39 | 7.41% | 1 | 3.70% |
Eric Dumazet | 39 | 7.41% | 5 | 18.52% |
Brian Haley | 15 | 2.85% | 3 | 11.11% |
Martin KaFai Lau | 12 | 2.28% | 3 | 11.11% |
Kazunori Miyazawa | 10 | 1.90% | 1 | 3.70% |
Max Matveev | 10 | 1.90% | 1 | 3.70% |
Alexey Dobriyan | 6 | 1.14% | 2 | 7.41% |
Tom Herbert | 5 | 0.95% | 2 | 7.41% |
Venkat Yekkirala | 4 | 0.76% | 1 | 3.70% |
David S. Miller | 3 | 0.57% | 2 | 7.41% |
Arnaud Ebalard | 3 | 0.57% | 1 | 3.70% |
Paolo Abeni | 3 | 0.57% | 1 | 3.70% |
Hannes Frederic Sowa | 2 | 0.38% | 1 | 3.70% |
Arnaldo Carvalho de Melo | 1 | 0.19% | 1 | 3.70% |
Total | 526 | 100.00% | 27 | 100.00% |
EXPORT_SYMBOL_GPL(__ip6_datagram_connect);
int ip6_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
{
int res;
lock_sock(sk);
res = __ip6_datagram_connect(sk, uaddr, addr_len);
release_sock(sk);
return res;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Eric Dumazet | 45 | 100.00% | 1 | 100.00% |
Total | 45 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(ip6_datagram_connect);
int ip6_datagram_connect_v6_only(struct sock *sk, struct sockaddr *uaddr,
int addr_len)
{
DECLARE_SOCKADDR(struct sockaddr_in6 *, sin6, uaddr);
if (sin6->sin6_family != AF_INET6)
return -EAFNOSUPPORT;
return ip6_datagram_connect(sk, uaddr, addr_len);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Hannes Frederic Sowa | 51 | 100.00% | 1 | 100.00% |
Total | 51 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(ip6_datagram_connect_v6_only);
void ipv6_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
__be16 port, u32 info, u8 *payload)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct icmp6hdr *icmph = icmp6_hdr(skb);
struct sock_exterr_skb *serr;
if (!np->recverr)
return;
skb = skb_clone(skb, GFP_ATOMIC);
if (!skb)
return;
skb->protocol = htons(ETH_P_IPV6);
serr = SKB_EXT_ERR(skb);
serr->ee.ee_errno = err;
serr->ee.ee_origin = SO_EE_ORIGIN_ICMP6;
serr->ee.ee_type = icmph->icmp6_type;
serr->ee.ee_code = icmph->icmp6_code;
serr->ee.ee_pad = 0;
serr->ee.ee_info = info;
serr->ee.ee_data = 0;
serr->addr_offset = (u8 *)&(((struct ipv6hdr *)(icmph + 1))->daddr) -
skb_network_header(skb);
serr->port = port;
__skb_pull(skb, payload - skb->data);
skb_reset_transport_header(skb);
if (sock_queue_err_skb(sk, skb))
kfree_skb(skb);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 186 | 84.93% | 1 | 12.50% |
David S. Miller | 11 | 5.02% | 1 | 12.50% |
Arnaldo Carvalho de Melo | 11 | 5.02% | 3 | 37.50% |
Brian Haley | 9 | 4.11% | 1 | 12.50% |
Linus Torvalds | 1 | 0.46% | 1 | 12.50% |
Al Viro | 1 | 0.46% | 1 | 12.50% |
Total | 219 | 100.00% | 8 | 100.00% |
void ipv6_local_error(struct sock *sk, int err, struct flowi6 *fl6, u32 info)
{
const struct ipv6_pinfo *np = inet6_sk(sk);
struct sock_exterr_skb *serr;
struct ipv6hdr *iph;
struct sk_buff *skb;
if (!np->recverr)
return;
skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC);
if (!skb)
return;
skb->protocol = htons(ETH_P_IPV6);
skb_put(skb, sizeof(struct ipv6hdr));
skb_reset_network_header(skb);
iph = ipv6_hdr(skb);
iph->daddr = fl6->daddr;
serr = SKB_EXT_ERR(skb);
serr->ee.ee_errno = err;
serr->ee.ee_origin = SO_EE_ORIGIN_LOCAL;
serr->ee.ee_type = 0;
serr->ee.ee_code = 0;
serr->ee.ee_pad = 0;
serr->ee.ee_info = info;
serr->ee.ee_data = 0;
serr->addr_offset = (u8 *)&iph->daddr - skb_network_header(skb);
serr->port = fl6->fl6_dport;
__skb_pull(skb, skb_tail_pointer(skb) - skb->data);
skb_reset_transport_header(skb);
if (sock_queue_err_skb(sk, skb))
kfree_skb(skb);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 186 | 78.81% | 1 | 7.69% |
Arnaldo Carvalho de Melo | 21 | 8.90% | 5 | 38.46% |
David S. Miller | 17 | 7.20% | 3 | 23.08% |
Brian Haley | 9 | 3.81% | 1 | 7.69% |
Alexey Dobriyan | 1 | 0.42% | 1 | 7.69% |
Linus Torvalds | 1 | 0.42% | 1 | 7.69% |
Eric Dumazet | 1 | 0.42% | 1 | 7.69% |
Total | 236 | 100.00% | 13 | 100.00% |
void ipv6_local_rxpmtu(struct sock *sk, struct flowi6 *fl6, u32 mtu)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct ipv6hdr *iph;
struct sk_buff *skb;
struct ip6_mtuinfo *mtu_info;
if (!np->rxopt.bits.rxpmtu)
return;
skb = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC);
if (!skb)
return;
skb_put(skb, sizeof(struct ipv6hdr));
skb_reset_network_header(skb);
iph = ipv6_hdr(skb);
iph->daddr = fl6->daddr;
mtu_info = IP6CBMTU(skb);
mtu_info->ip6m_mtu = mtu;
mtu_info->ip6m_addr.sin6_family = AF_INET6;
mtu_info->ip6m_addr.sin6_port = 0;
mtu_info->ip6m_addr.sin6_flowinfo = 0;
mtu_info->ip6m_addr.sin6_scope_id = fl6->flowi6_oif;
mtu_info->ip6m_addr.sin6_addr = ipv6_hdr(skb)->daddr;
__skb_pull(skb, skb_tail_pointer(skb) - skb->data);
skb_reset_transport_header(skb);
skb = xchg(&np->rxpmtu, skb);
kfree_skb(skb);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Brian Haley | 193 | 96.02% | 1 | 33.33% |
David S. Miller | 6 | 2.99% | 1 | 33.33% |
Alexey Dobriyan | 2 | 1.00% | 1 | 33.33% |
Total | 201 | 100.00% | 3 | 100.00% |
/* For some errors we have valid addr_offset even with zero payload and
* zero port. Also, addr_offset should be supported if port is set.
*/
static inline bool ipv6_datagram_support_addr(struct sock_exterr_skb *serr)
{
return serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6 ||
serr->ee.ee_origin == SO_EE_ORIGIN_ICMP ||
serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL || serr->port;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Julian Anastasov | 41 | 100.00% | 1 | 100.00% |
Total | 41 | 100.00% | 1 | 100.00% |
/* IPv6 supports cmsg on all origins aside from SO_EE_ORIGIN_LOCAL.
*
* At one point, excluding local errors was a quick test to identify icmp/icmp6
* errors. This is no longer true, but the test remained, so the v6 stack,
* unlike v4, also honors cmsg requests on all wifi and timestamp errors.
*/
static bool ip6_datagram_support_cmsg(struct sk_buff *skb,
struct sock_exterr_skb *serr)
{
if (serr->ee.ee_origin == SO_EE_ORIGIN_ICMP ||
serr->ee.ee_origin == SO_EE_ORIGIN_ICMP6)
return true;
if (serr->ee.ee_origin == SO_EE_ORIGIN_LOCAL)
return false;
if (!IP6CB(skb)->iif)
return false;
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Willem de Bruijn | 66 | 100.00% | 3 | 100.00% |
Total | 66 | 100.00% | 3 | 100.00% |
/*
* Handle MSG_ERRQUEUE
*/
int ipv6_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sock_exterr_skb *serr;
struct sk_buff *skb;
DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name);
struct {
struct sock_extended_err ee;
struct sockaddr_in6 offender;
} errhdr;
int err;
int copied;
err = -EAGAIN;
skb = sock_dequeue_err_skb(sk);
if (!skb)
goto out;
copied = skb->len;
if (copied > len) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
err = skb_copy_datagram_msg(skb, 0, msg, copied);
if (unlikely(err)) {
kfree_skb(skb);
return err;
}
sock_recv_timestamp(msg, sk, skb);
serr = SKB_EXT_ERR(skb);
if (sin && ipv6_datagram_support_addr(serr)) {
const unsigned char *nh = skb_network_header(skb);
sin->sin6_family = AF_INET6;
sin->sin6_flowinfo = 0;
sin->sin6_port = serr->port;
if (skb->protocol == htons(ETH_P_IPV6)) {
const struct ipv6hdr *ip6h = container_of((struct in6_addr *)(nh + serr->addr_offset),
struct ipv6hdr, daddr);
sin->sin6_addr = ip6h->daddr;
if (np->sndflow)
sin->sin6_flowinfo = ip6_flowinfo(ip6h);
sin->sin6_scope_id =
ipv6_iface_scope_id(&sin->sin6_addr,
IP6CB(skb)->iif);
} else {
ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset),
&sin->sin6_addr);
sin->sin6_scope_id = 0;
}
*addr_len = sizeof(*sin);
}
memcpy(&errhdr.ee, &serr->ee, sizeof(struct sock_extended_err));
sin = &errhdr.offender;
memset(sin, 0, sizeof(*sin));
if (ip6_datagram_support_cmsg(skb, serr)) {
sin->sin6_family = AF_INET6;
if (np->rxopt.all)
ip6_datagram_recv_common_ctl(sk, msg, skb);
if (skb->protocol == htons(ETH_P_IPV6)) {
sin->sin6_addr = ipv6_hdr(skb)->saddr;
if (np->rxopt.all)
ip6_datagram_recv_specific_ctl(sk, msg, skb);
sin->sin6_scope_id =
ipv6_iface_scope_id(&sin->sin6_addr,
IP6CB(skb)->iif);
} else {
ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr,
&sin->sin6_addr);
if (inet_sk(sk)->cmsg_flags)
ip_cmsg_recv(msg, skb);
}
}
put_cmsg(msg, SOL_IPV6, IPV6_RECVERR, sizeof(errhdr), &errhdr);
/* Now we could try to dump offended packet options */
msg->msg_flags |= MSG_ERRQUEUE;
err = copied;
consume_skb(skb);
out:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Linus Torvalds (pre-git) | 327 | 61.47% | 5 | 16.67% |
Hannes Frederic Sowa | 51 | 9.59% | 3 | 10.00% |
Hideaki Yoshifuji / 吉藤英明 | 34 | 6.39% | 3 | 10.00% |
Arnaldo Carvalho de Melo | 24 | 4.51% | 4 | 13.33% |
Willem de Bruijn | 24 | 4.51% | 4 | 13.33% |
Brian Haley | 24 | 4.51% | 2 | 6.67% |
Eric Dumazet | 14 | 2.63% | 1 | 3.33% |
David S. Miller | 13 | 2.44% | 2 | 6.67% |
Steffen Hurrle | 11 | 2.07% | 1 | 3.33% |
Linus Torvalds | 4 | 0.75% | 1 | 3.33% |
Julian Anastasov | 3 | 0.56% | 1 | 3.33% |
Alexey Dobriyan | 1 | 0.19% | 1 | 3.33% |
Al Viro | 1 | 0.19% | 1 | 3.33% |
Ian Morris | 1 | 0.19% | 1 | 3.33% |
Total | 532 | 100.00% | 30 | 100.00% |
EXPORT_SYMBOL_GPL(ipv6_recv_error);
/*
* Handle IPV6_RECVPATHMTU
*/
int ipv6_recv_rxpmtu(struct sock *sk, struct msghdr *msg, int len,
int *addr_len)
{
struct ipv6_pinfo *np = inet6_sk(sk);
struct sk_buff *skb;
struct ip6_mtuinfo mtu_info;
DECLARE_SOCKADDR(struct sockaddr_in6 *, sin, msg->msg_name);
int err;
int copied;
err = -EAGAIN;
skb = xchg(&np->rxpmtu, NULL);
if (!skb)
goto out;
copied = skb->len;
if (copied > len) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
err = skb_copy_datagram_msg(skb, 0, msg, copied);
if (err)
goto out_free_skb;
sock_recv_timestamp(msg, sk, skb);
memcpy(&mtu_info, IP6CBMTU(skb), sizeof(mtu_info));
if (sin) {
sin->sin6_family = AF_INET6;
sin->sin6_flowinfo = 0;
sin->sin6_port = 0;
sin->sin6_scope_id = mtu_info.ip6m_addr.sin6_scope_id;
sin->sin6_addr = mtu_info.ip6m_addr.sin6_addr;
*addr_len = sizeof(*sin);
}
put_cmsg(msg, SOL_IPV6, IPV6_PATHMTU, sizeof(mtu_info), &mtu_info);
err = copied;
out_free_skb:
kfree_skb(skb);
out:
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Brian Haley | 211 | 87.92% | 1 | 16.67% |
Hannes Frederic Sowa | 13 | 5.42% | 1 | 16.67% |
Steffen Hurrle | 13 | 5.42% | 1 | 16.67% |
David S. Miller | 1 | 0.42% | 1 | 16.67% |
Ian Morris | 1 | 0.42% | 1 | 16.67% |
Alexey Dobriyan | 1 | 0.42% | 1 | 16.67% |
Total | 240 | 100.00% | 6 | 100.00% |
void ip6_datagram_recv_common_ctl(struct sock *sk, struct msghdr *msg,
struct sk_buff *skb)
{
struct ipv6_pinfo *np = inet6_sk(sk);
bool is_ipv6 = skb->protocol == htons(ETH_P_IPV6);
if (np->rxopt.bits.rxinfo) {
struct in6_pktinfo src_info;
if (is_ipv6) {
src_info.ipi6_ifindex = IP6CB(skb)->iif;
src_info.ipi6_addr = ipv6_hdr(skb)->daddr;
} else {
src_info.ipi6_ifindex =
PKTINFO_SKB_CB(skb)->ipi_ifindex;
ipv6_addr_set_v4mapped(ip_hdr(skb)->daddr,
&src_info.ipi6_addr);
}
if (src_info.ipi6_ifindex >= 0)