2005-04-16 16:20:36 -06:00
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the IP module.
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*
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* Version: @(#)ip.h 1.0.2 05/07/93
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*
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2005-05-05 17:16:16 -06:00
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* Authors: Ross Biro
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2005-04-16 16:20:36 -06:00
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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* Alan Cox, <gw4pts@gw4pts.ampr.org>
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*
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* Changes:
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* Mike McLagan : Routing by source
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _IP_H
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#define _IP_H
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#include <linux/types.h>
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#include <linux/ip.h>
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#include <linux/in.h>
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2007-03-12 17:09:15 -06:00
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#include <linux/skbuff.h>
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2005-12-26 21:43:12 -07:00
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#include <net/inet_sock.h>
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2013-09-24 07:43:09 -06:00
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#include <net/route.h>
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2005-04-16 16:20:36 -06:00
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#include <net/snmp.h>
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2008-10-01 08:44:42 -06:00
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#include <net/flow.h>
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2005-04-16 16:20:36 -06:00
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struct sock;
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2009-11-02 20:26:03 -07:00
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struct inet_skb_parm {
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2005-04-16 16:20:36 -06:00
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struct ip_options opt; /* Compiled IP options */
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unsigned char flags;
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2006-01-07 00:04:01 -07:00
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#define IPSKB_FORWARDED 1
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#define IPSKB_XFRM_TUNNEL_SIZE 2
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2006-01-07 00:04:54 -07:00
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#define IPSKB_XFRM_TRANSFORMED 4
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#define IPSKB_FRAG_COMPLETE 8
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2006-02-15 16:10:22 -07:00
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#define IPSKB_REROUTED 16
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2012-08-26 11:13:55 -06:00
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u16 frag_max_size;
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2005-04-16 16:20:36 -06:00
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};
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2007-03-12 17:09:15 -06:00
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static inline unsigned int ip_hdrlen(const struct sk_buff *skb)
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{
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2007-04-20 23:47:35 -06:00
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return ip_hdr(skb)->ihl * 4;
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2007-03-12 17:09:15 -06:00
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}
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2009-11-02 20:26:03 -07:00
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struct ipcm_cookie {
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2006-09-27 19:28:28 -06:00
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__be32 addr;
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2005-04-16 16:20:36 -06:00
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int oif;
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2011-04-21 03:45:37 -06:00
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struct ip_options_rcu *opt;
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2010-08-17 02:59:14 -06:00
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__u8 tx_flags;
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2013-09-24 07:43:08 -06:00
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__u8 ttl;
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__s16 tos;
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char priority;
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2005-04-16 16:20:36 -06:00
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};
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#define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb))
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2014-01-19 19:43:08 -07:00
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#define PKTINFO_SKB_CB(skb) ((struct in_pktinfo *)((skb)->cb))
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2005-04-16 16:20:36 -06:00
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2009-11-02 20:26:03 -07:00
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struct ip_ra_chain {
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2010-10-24 21:32:44 -06:00
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struct ip_ra_chain __rcu *next;
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2005-04-16 16:20:36 -06:00
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struct sock *sk;
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2010-06-09 10:21:07 -06:00
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union {
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void (*destructor)(struct sock *);
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struct sock *saved_sk;
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};
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2010-06-06 21:12:08 -06:00
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struct rcu_head rcu;
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2005-04-16 16:20:36 -06:00
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};
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2010-10-24 21:32:44 -06:00
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extern struct ip_ra_chain __rcu *ip_ra_chain;
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2005-04-16 16:20:36 -06:00
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/* IP flags. */
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#define IP_CE 0x8000 /* Flag: "Congestion" */
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#define IP_DF 0x4000 /* Flag: "Don't Fragment" */
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#define IP_MF 0x2000 /* Flag: "More Fragments" */
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#define IP_OFFSET 0x1FFF /* "Fragment Offset" part */
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#define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */
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2005-12-26 21:43:12 -07:00
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struct msghdr;
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struct net_device;
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struct packet_type;
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struct rtable;
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struct sockaddr;
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2014-01-10 17:09:45 -07:00
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int igmp_mc_init(void);
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2005-04-16 16:20:36 -06:00
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/*
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* Functions provided by ip.c
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*/
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2013-09-21 11:22:42 -06:00
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int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
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__be32 saddr, __be32 daddr,
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struct ip_options_rcu *opt);
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int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
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struct net_device *orig_dev);
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int ip_local_deliver(struct sk_buff *skb);
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int ip_mr_input(struct sk_buff *skb);
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2014-04-15 11:47:15 -06:00
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int ip_output(struct sock *sk, struct sk_buff *skb);
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int ip_mc_output(struct sock *sk, struct sk_buff *skb);
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2013-09-21 11:22:42 -06:00
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int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
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int ip_do_nat(struct sk_buff *skb);
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void ip_send_check(struct iphdr *ip);
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int __ip_local_out(struct sk_buff *skb);
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2014-04-15 11:47:15 -06:00
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int ip_local_out_sk(struct sock *sk, struct sk_buff *skb);
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static inline int ip_local_out(struct sk_buff *skb)
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{
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return ip_local_out_sk(skb->sk, skb);
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}
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2014-04-15 10:58:34 -06:00
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int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl);
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2013-09-21 11:22:42 -06:00
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void ip_init(void);
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int ip_append_data(struct sock *sk, struct flowi4 *fl4,
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int getfrag(void *from, char *to, int offset, int len,
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int odd, struct sk_buff *skb),
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void *from, int len, int protolen,
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struct ipcm_cookie *ipc,
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struct rtable **rt,
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unsigned int flags);
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int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd,
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struct sk_buff *skb);
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ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
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int offset, size_t size, int flags);
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struct sk_buff *__ip_make_skb(struct sock *sk, struct flowi4 *fl4,
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struct sk_buff_head *queue,
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struct inet_cork *cork);
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int ip_send_skb(struct net *net, struct sk_buff *skb);
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int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4);
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void ip_flush_pending_frames(struct sock *sk);
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struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4,
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int getfrag(void *from, char *to, int offset,
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int len, int odd, struct sk_buff *skb),
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void *from, int length, int transhdrlen,
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struct ipcm_cookie *ipc, struct rtable **rtp,
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unsigned int flags);
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2011-02-28 19:36:47 -07:00
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2011-05-08 18:12:19 -06:00
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static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4)
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2011-02-28 19:36:47 -07:00
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{
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2011-05-08 18:12:19 -06:00
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return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
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2011-02-28 19:36:47 -07:00
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}
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2005-04-16 16:20:36 -06:00
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2013-09-24 07:43:09 -06:00
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static inline __u8 get_rttos(struct ipcm_cookie* ipc, struct inet_sock *inet)
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{
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return (ipc->tos != -1) ? RT_TOS(ipc->tos) : RT_TOS(inet->tos);
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}
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static inline __u8 get_rtconn_flags(struct ipcm_cookie* ipc, struct sock* sk)
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{
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return (ipc->tos != -1) ? RT_CONN_FLAGS_TOS(sk, ipc->tos) : RT_CONN_FLAGS(sk);
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}
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2005-04-16 16:20:36 -06:00
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/* datagram.c */
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2013-09-21 11:22:42 -06:00
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int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
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2005-04-16 16:20:36 -06:00
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2013-09-21 11:22:42 -06:00
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void ip4_datagram_release_cb(struct sock *sk);
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2013-01-20 19:00:03 -07:00
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2005-04-16 16:20:36 -06:00
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struct ip_reply_arg {
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struct kvec iov[1];
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2008-10-01 08:41:00 -06:00
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int flags;
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2006-11-14 22:26:08 -07:00
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__wsum csum;
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2005-04-16 16:20:36 -06:00
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int csumoffset; /* u16 offset of csum in iov[0].iov_base */
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/* -1 if not needed */
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2007-06-04 22:32:46 -06:00
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int bound_dev_if;
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2011-10-24 01:06:21 -06:00
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u8 tos;
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2005-04-16 16:20:36 -06:00
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};
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2008-10-01 08:41:00 -06:00
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#define IP_REPLY_ARG_NOSRCCHECK 1
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2008-10-01 08:44:42 -06:00
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static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg)
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{
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return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0;
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}
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2012-07-19 01:34:03 -06:00
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void ip_send_unicast_reply(struct net *net, struct sk_buff *skb, __be32 daddr,
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2012-06-28 04:21:41 -06:00
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__be32 saddr, const struct ip_reply_arg *arg,
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unsigned int len);
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2005-04-16 16:20:36 -06:00
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2010-06-30 14:31:19 -06:00
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#define IP_INC_STATS(net, field) SNMP_INC_STATS64((net)->mib.ip_statistics, field)
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#define IP_INC_STATS_BH(net, field) SNMP_INC_STATS64_BH((net)->mib.ip_statistics, field)
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#define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS64((net)->mib.ip_statistics, field, val)
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#define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS64_BH((net)->mib.ip_statistics, field, val)
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#define IP_UPD_PO_STATS(net, field, val) SNMP_UPD_PO_STATS64((net)->mib.ip_statistics, field, val)
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#define IP_UPD_PO_STATS_BH(net, field, val) SNMP_UPD_PO_STATS64_BH((net)->mib.ip_statistics, field, val)
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2008-07-18 05:03:08 -06:00
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#define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field)
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#define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field)
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#define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field)
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2014-03-06 13:03:17 -07:00
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#define NET_ADD_STATS(net, field, adnd) SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd)
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2008-07-18 05:03:08 -06:00
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#define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd)
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#define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd)
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2005-04-16 16:20:36 -06:00
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2013-09-21 11:22:42 -06:00
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unsigned long snmp_fold_field(void __percpu *mib[], int offt);
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2010-06-30 14:31:19 -06:00
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#if BITS_PER_LONG==32
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2013-09-21 11:22:42 -06:00
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u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t sync_off);
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2010-06-30 14:31:19 -06:00
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#else
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static inline u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_off)
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{
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return snmp_fold_field(mib, offt);
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}
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#endif
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2013-09-21 11:22:42 -06:00
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int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align);
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2013-09-01 20:06:53 -06:00
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static inline void snmp_mib_free(void __percpu *ptr[SNMP_ARRAY_SZ])
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{
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int i;
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BUG_ON(ptr == NULL);
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for (i = 0; i < SNMP_ARRAY_SZ; i++) {
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free_percpu(ptr[i]);
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ptr[i] = NULL;
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}
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}
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2007-04-20 16:57:15 -06:00
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2013-09-28 15:10:59 -06:00
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void inet_get_local_port_range(struct net *net, int *low, int *high);
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2007-10-10 18:30:46 -06:00
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2010-05-04 18:27:06 -06:00
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extern unsigned long *sysctl_local_reserved_ports;
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static inline int inet_is_reserved_local_port(int port)
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{
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return test_bit(port, sysctl_local_reserved_ports);
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}
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2005-06-13 16:12:33 -06:00
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extern int sysctl_ip_nonlocal_bind;
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2005-04-16 16:20:36 -06:00
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2005-08-15 23:18:02 -06:00
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/* From inetpeer.c */
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extern int inet_peer_threshold;
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extern int inet_peer_minttl;
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extern int inet_peer_maxttl;
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2012-06-21 07:58:31 -06:00
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/* From ip_input.c */
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extern int sysctl_ip_early_demux;
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2005-08-15 23:18:02 -06:00
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/* From ip_output.c */
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extern int sysctl_ip_dynaddr;
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2013-09-21 11:22:42 -06:00
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void ipfrag_init(void);
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2005-08-15 23:18:02 -06:00
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2013-09-21 11:22:42 -06:00
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void ip_static_sysctl_init(void);
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2008-07-15 14:00:59 -06:00
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2011-06-23 22:28:52 -06:00
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static inline bool ip_is_fragment(const struct iphdr *iph)
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{
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return (iph->frag_off & htons(IP_MF | IP_OFFSET)) != 0;
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}
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2005-04-16 16:20:36 -06:00
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#ifdef CONFIG_INET
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2005-12-26 21:43:12 -07:00
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#include <net/dst.h>
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2005-04-16 16:20:36 -06:00
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/* The function in 2.2 was invalid, producing wrong result for
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* check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */
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static inline
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int ip_decrease_ttl(struct iphdr *iph)
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{
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2006-11-14 22:42:26 -07:00
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u32 check = (__force u32)iph->check;
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check += (__force u32)htons(0x0100);
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iph->check = (__force __sum16)(check + (check>=0xFFFF));
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2005-04-16 16:20:36 -06:00
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return --iph->ttl;
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}
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static inline
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int ip_dont_fragment(struct sock *sk, struct dst_entry *dst)
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{
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2010-09-22 14:43:57 -06:00
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return inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO ||
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2005-04-16 16:20:36 -06:00
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(inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT &&
|
2010-09-22 14:43:57 -06:00
|
|
|
!(dst_metric_locked(dst, RTAX_MTU)));
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
2014-01-09 02:01:15 -07:00
|
|
|
static inline bool ip_sk_accept_pmtu(const struct sock *sk)
|
|
|
|
{
|
2014-02-25 17:20:42 -07:00
|
|
|
return inet_sk(sk)->pmtudisc != IP_PMTUDISC_INTERFACE &&
|
|
|
|
inet_sk(sk)->pmtudisc != IP_PMTUDISC_OMIT;
|
2014-01-09 02:01:15 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
static inline bool ip_sk_use_pmtu(const struct sock *sk)
|
|
|
|
{
|
|
|
|
return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE;
|
|
|
|
}
|
|
|
|
|
2014-02-25 17:20:42 -07:00
|
|
|
static inline bool ip_sk_local_df(const struct sock *sk)
|
|
|
|
{
|
|
|
|
return inet_sk(sk)->pmtudisc < IP_PMTUDISC_DO ||
|
|
|
|
inet_sk(sk)->pmtudisc == IP_PMTUDISC_OMIT;
|
|
|
|
}
|
|
|
|
|
2014-01-09 02:01:15 -07:00
|
|
|
static inline unsigned int ip_dst_mtu_maybe_forward(const struct dst_entry *dst,
|
|
|
|
bool forwarding)
|
|
|
|
{
|
|
|
|
struct net *net = dev_net(dst->dev);
|
|
|
|
|
|
|
|
if (net->ipv4.sysctl_ip_fwd_use_pmtu ||
|
|
|
|
dst_metric_locked(dst, RTAX_MTU) ||
|
|
|
|
!forwarding)
|
|
|
|
return dst_mtu(dst);
|
|
|
|
|
|
|
|
return min(dst->dev->mtu, IP_MAX_MTU);
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline unsigned int ip_skb_dst_mtu(const struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
if (!skb->sk || ip_sk_use_pmtu(skb->sk)) {
|
|
|
|
bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED;
|
|
|
|
return ip_dst_mtu_maybe_forward(skb_dst(skb), forwarding);
|
|
|
|
} else {
|
|
|
|
return min(skb_dst(skb)->dev->mtu, IP_MAX_MTU);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2013-09-21 11:22:42 -06:00
|
|
|
void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2013-09-18 16:29:53 -06:00
|
|
|
static inline void ip_select_ident(struct sk_buff *skb, struct dst_entry *dst, struct sock *sk)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2013-09-18 16:29:53 -06:00
|
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
|
|
|
|
if ((iph->frag_off & htons(IP_DF)) && !skb->local_df) {
|
2005-04-16 16:20:36 -06:00
|
|
|
/* This is only to work around buggy Windows95/2000
|
|
|
|
* VJ compression implementations. If the ID field
|
|
|
|
* does not change, they drop every other packet in
|
|
|
|
* a TCP stream using header compression.
|
|
|
|
*/
|
2009-10-15 00:30:45 -06:00
|
|
|
iph->id = (sk && inet_sk(sk)->inet_daddr) ?
|
|
|
|
htons(inet_sk(sk)->inet_id++) : 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
} else
|
|
|
|
__ip_select_ident(iph, dst, 0);
|
|
|
|
}
|
|
|
|
|
2013-09-18 16:29:53 -06:00
|
|
|
static inline void ip_select_ident_more(struct sk_buff *skb, struct dst_entry *dst, struct sock *sk, int more)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2013-09-18 16:29:53 -06:00
|
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
|
|
|
|
if ((iph->frag_off & htons(IP_DF)) && !skb->local_df) {
|
2009-10-15 00:30:45 -06:00
|
|
|
if (sk && inet_sk(sk)->inet_daddr) {
|
|
|
|
iph->id = htons(inet_sk(sk)->inet_id);
|
|
|
|
inet_sk(sk)->inet_id += 1 + more;
|
2005-04-16 16:20:36 -06:00
|
|
|
} else
|
|
|
|
iph->id = 0;
|
|
|
|
} else
|
|
|
|
__ip_select_ident(iph, dst, more);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Map a multicast IP onto multicast MAC for type ethernet.
|
|
|
|
*/
|
|
|
|
|
2006-11-14 21:51:49 -07:00
|
|
|
static inline void ip_eth_mc_map(__be32 naddr, char *buf)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2006-11-14 21:51:49 -07:00
|
|
|
__u32 addr=ntohl(naddr);
|
2005-04-16 16:20:36 -06:00
|
|
|
buf[0]=0x01;
|
|
|
|
buf[1]=0x00;
|
|
|
|
buf[2]=0x5e;
|
|
|
|
buf[5]=addr&0xFF;
|
|
|
|
addr>>=8;
|
|
|
|
buf[4]=addr&0xFF;
|
|
|
|
addr>>=8;
|
|
|
|
buf[3]=addr&0x7F;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Map a multicast IP onto multicast MAC for type IP-over-InfiniBand.
|
|
|
|
* Leave P_Key as 0 to be filled in by driver.
|
|
|
|
*/
|
|
|
|
|
2007-12-10 13:38:41 -07:00
|
|
|
static inline void ip_ib_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2006-11-14 21:51:49 -07:00
|
|
|
__u32 addr;
|
2007-12-10 13:38:41 -07:00
|
|
|
unsigned char scope = broadcast[5] & 0xF;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
buf[0] = 0; /* Reserved */
|
|
|
|
buf[1] = 0xff; /* Multicast QPN */
|
|
|
|
buf[2] = 0xff;
|
|
|
|
buf[3] = 0xff;
|
2006-11-14 21:51:49 -07:00
|
|
|
addr = ntohl(naddr);
|
2005-04-16 16:20:36 -06:00
|
|
|
buf[4] = 0xff;
|
2007-12-10 13:38:41 -07:00
|
|
|
buf[5] = 0x10 | scope; /* scope from broadcast address */
|
2005-04-16 16:20:36 -06:00
|
|
|
buf[6] = 0x40; /* IPv4 signature */
|
|
|
|
buf[7] = 0x1b;
|
2007-12-10 13:38:41 -07:00
|
|
|
buf[8] = broadcast[8]; /* P_Key */
|
|
|
|
buf[9] = broadcast[9];
|
2005-04-16 16:20:36 -06:00
|
|
|
buf[10] = 0;
|
|
|
|
buf[11] = 0;
|
|
|
|
buf[12] = 0;
|
|
|
|
buf[13] = 0;
|
|
|
|
buf[14] = 0;
|
|
|
|
buf[15] = 0;
|
|
|
|
buf[19] = addr & 0xff;
|
|
|
|
addr >>= 8;
|
|
|
|
buf[18] = addr & 0xff;
|
|
|
|
addr >>= 8;
|
|
|
|
buf[17] = addr & 0xff;
|
|
|
|
addr >>= 8;
|
|
|
|
buf[16] = addr & 0x0f;
|
|
|
|
}
|
|
|
|
|
2011-03-28 16:40:53 -06:00
|
|
|
static inline void ip_ipgre_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf)
|
|
|
|
{
|
|
|
|
if ((broadcast[0] | broadcast[1] | broadcast[2] | broadcast[3]) != 0)
|
|
|
|
memcpy(buf, broadcast, 4);
|
|
|
|
else
|
|
|
|
memcpy(buf, &naddr, sizeof(naddr));
|
|
|
|
}
|
|
|
|
|
2011-12-10 02:48:31 -07:00
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
2005-04-16 16:20:36 -06:00
|
|
|
#include <linux/ipv6.h>
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static __inline__ void inet_reset_saddr(struct sock *sk)
|
|
|
|
{
|
2009-10-15 00:30:45 -06:00
|
|
|
inet_sk(sk)->inet_rcv_saddr = inet_sk(sk)->inet_saddr = 0;
|
2011-12-10 02:48:31 -07:00
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
2005-04-16 16:20:36 -06:00
|
|
|
if (sk->sk_family == PF_INET6) {
|
|
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
|
|
|
|
memset(&np->saddr, 0, sizeof(np->saddr));
|
ipv6: make lookups simpler and faster
TCP listener refactoring, part 4 :
To speed up inet lookups, we moved IPv4 addresses from inet to struct
sock_common
Now is time to do the same for IPv6, because it permits us to have fast
lookups for all kind of sockets, including upcoming SYN_RECV.
Getting IPv6 addresses in TCP lookups currently requires two extra cache
lines, plus a dereference (and memory stall).
inet6_sk(sk) does the dereference of inet_sk(__sk)->pinet6
This patch is way bigger than its IPv4 counter part, because for IPv4,
we could add aliases (inet_daddr, inet_rcv_saddr), while on IPv6,
it's not doable easily.
inet6_sk(sk)->daddr becomes sk->sk_v6_daddr
inet6_sk(sk)->rcv_saddr becomes sk->sk_v6_rcv_saddr
And timewait socket also have tw->tw_v6_daddr & tw->tw_v6_rcv_saddr
at the same offset.
We get rid of INET6_TW_MATCH() as INET6_MATCH() is now the generic
macro.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-10-03 16:42:29 -06:00
|
|
|
memset(&sk->sk_v6_rcv_saddr, 0, sizeof(sk->sk_v6_rcv_saddr));
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
2010-01-06 21:37:01 -07:00
|
|
|
static inline int sk_mc_loop(struct sock *sk)
|
|
|
|
{
|
|
|
|
if (!sk)
|
|
|
|
return 1;
|
|
|
|
switch (sk->sk_family) {
|
|
|
|
case AF_INET:
|
|
|
|
return inet_sk(sk)->mc_loop;
|
2011-12-10 02:48:31 -07:00
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
2010-01-06 21:37:01 -07:00
|
|
|
case AF_INET6:
|
|
|
|
return inet6_sk(sk)->mc_loop;
|
|
|
|
#endif
|
|
|
|
}
|
2010-01-13 19:10:36 -07:00
|
|
|
WARN_ON(1);
|
2010-01-06 21:37:01 -07:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
2013-09-21 11:22:42 -06:00
|
|
|
bool ip_call_ra_chain(struct sk_buff *skb);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
2008-01-01 22:13:09 -07:00
|
|
|
* Functions provided by ip_fragment.c
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
|
2009-11-02 20:26:03 -07:00
|
|
|
enum ip_defrag_users {
|
2005-04-16 16:20:36 -06:00
|
|
|
IP_DEFRAG_LOCAL_DELIVER,
|
|
|
|
IP_DEFRAG_CALL_RA_CHAIN,
|
|
|
|
IP_DEFRAG_CONNTRACK_IN,
|
2010-05-24 15:33:03 -06:00
|
|
|
__IP_DEFRAG_CONNTRACK_IN_END = IP_DEFRAG_CONNTRACK_IN + USHRT_MAX,
|
2005-04-16 16:20:36 -06:00
|
|
|
IP_DEFRAG_CONNTRACK_OUT,
|
2010-05-24 15:33:03 -06:00
|
|
|
__IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
|
2009-12-15 08:59:59 -07:00
|
|
|
IP_DEFRAG_CONNTRACK_BRIDGE_IN,
|
2010-05-24 15:33:03 -06:00
|
|
|
__IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
|
2005-04-16 16:20:36 -06:00
|
|
|
IP_DEFRAG_VS_IN,
|
|
|
|
IP_DEFRAG_VS_OUT,
|
2011-07-05 02:05:48 -06:00
|
|
|
IP_DEFRAG_VS_FWD,
|
|
|
|
IP_DEFRAG_AF_PACKET,
|
2011-10-06 04:28:31 -06:00
|
|
|
IP_DEFRAG_MACVLAN,
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
2007-10-14 01:38:32 -06:00
|
|
|
int ip_defrag(struct sk_buff *skb, u32 user);
|
2011-10-06 04:28:31 -06:00
|
|
|
#ifdef CONFIG_INET
|
|
|
|
struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user);
|
|
|
|
#else
|
|
|
|
static inline struct sk_buff *ip_check_defrag(struct sk_buff *skb, u32 user)
|
|
|
|
{
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
#endif
|
2008-01-22 07:07:25 -07:00
|
|
|
int ip_frag_mem(struct net *net);
|
2008-01-22 07:06:23 -07:00
|
|
|
int ip_frag_nqueues(struct net *net);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Functions provided by ip_forward.c
|
|
|
|
*/
|
|
|
|
|
2013-09-21 11:22:42 -06:00
|
|
|
int ip_forward(struct sk_buff *skb);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Functions provided by ip_options.c
|
|
|
|
*/
|
|
|
|
|
2013-09-21 11:22:42 -06:00
|
|
|
void ip_options_build(struct sk_buff *skb, struct ip_options *opt,
|
|
|
|
__be32 daddr, struct rtable *rt, int is_frag);
|
|
|
|
int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb);
|
|
|
|
void ip_options_fragment(struct sk_buff *skb);
|
|
|
|
int ip_options_compile(struct net *net, struct ip_options *opt,
|
|
|
|
struct sk_buff *skb);
|
|
|
|
int ip_options_get(struct net *net, struct ip_options_rcu **optp,
|
|
|
|
unsigned char *data, int optlen);
|
|
|
|
int ip_options_get_from_user(struct net *net, struct ip_options_rcu **optp,
|
|
|
|
unsigned char __user *data, int optlen);
|
|
|
|
void ip_options_undo(struct ip_options *opt);
|
|
|
|
void ip_forward_options(struct sk_buff *skb);
|
|
|
|
int ip_options_rcv_srr(struct sk_buff *skb);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* Functions provided by ip_sockglue.c
|
|
|
|
*/
|
|
|
|
|
2013-10-07 10:01:40 -06:00
|
|
|
void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb);
|
2013-09-21 11:22:42 -06:00
|
|
|
void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb);
|
2014-02-18 13:38:08 -07:00
|
|
|
int ip_cmsg_send(struct net *net, struct msghdr *msg,
|
|
|
|
struct ipcm_cookie *ipc, bool allow_ipv6);
|
2013-09-21 11:22:42 -06:00
|
|
|
int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
|
|
|
|
unsigned int optlen);
|
|
|
|
int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
|
|
|
|
int __user *optlen);
|
|
|
|
int compat_ip_setsockopt(struct sock *sk, int level, int optname,
|
|
|
|
char __user *optval, unsigned int optlen);
|
|
|
|
int compat_ip_getsockopt(struct sock *sk, int level, int optname,
|
|
|
|
char __user *optval, int __user *optlen);
|
|
|
|
int ip_ra_control(struct sock *sk, unsigned char on,
|
|
|
|
void (*destructor)(struct sock *));
|
|
|
|
|
2013-11-22 16:46:12 -07:00
|
|
|
int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len);
|
2013-09-21 11:22:42 -06:00
|
|
|
void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err, __be16 port,
|
|
|
|
u32 info, u8 *payload);
|
|
|
|
void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport,
|
|
|
|
u32 info);
|
2005-04-16 16:20:36 -06:00
|
|
|
|
2005-08-15 23:18:02 -06:00
|
|
|
#ifdef CONFIG_PROC_FS
|
2013-09-21 11:22:42 -06:00
|
|
|
int ip_misc_proc_init(void);
|
2005-08-15 23:18:02 -06:00
|
|
|
#endif
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif /* _IP_H */
|