mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-16 14:02:10 +00:00
0bbeafd011
Signed-off-by: Satoru SATOH <satoru.satoh@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
395 lines
11 KiB
C
395 lines
11 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Definitions for the IP module.
|
|
*
|
|
* Version: @(#)ip.h 1.0.2 05/07/93
|
|
*
|
|
* Authors: Ross Biro
|
|
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
|
|
* Alan Cox, <gw4pts@gw4pts.ampr.org>
|
|
*
|
|
* Changes:
|
|
* Mike McLagan : Routing by source
|
|
*
|
|
* 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.
|
|
*/
|
|
#ifndef _IP_H
|
|
#define _IP_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/ip.h>
|
|
#include <linux/in.h>
|
|
#include <linux/skbuff.h>
|
|
|
|
#include <net/inet_sock.h>
|
|
#include <net/snmp.h>
|
|
|
|
struct sock;
|
|
|
|
struct inet_skb_parm
|
|
{
|
|
struct ip_options opt; /* Compiled IP options */
|
|
unsigned char flags;
|
|
|
|
#define IPSKB_FORWARDED 1
|
|
#define IPSKB_XFRM_TUNNEL_SIZE 2
|
|
#define IPSKB_XFRM_TRANSFORMED 4
|
|
#define IPSKB_FRAG_COMPLETE 8
|
|
#define IPSKB_REROUTED 16
|
|
};
|
|
|
|
static inline unsigned int ip_hdrlen(const struct sk_buff *skb)
|
|
{
|
|
return ip_hdr(skb)->ihl * 4;
|
|
}
|
|
|
|
struct ipcm_cookie
|
|
{
|
|
__be32 addr;
|
|
int oif;
|
|
struct ip_options *opt;
|
|
};
|
|
|
|
#define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb))
|
|
|
|
struct ip_ra_chain
|
|
{
|
|
struct ip_ra_chain *next;
|
|
struct sock *sk;
|
|
void (*destructor)(struct sock *);
|
|
};
|
|
|
|
extern struct ip_ra_chain *ip_ra_chain;
|
|
extern rwlock_t ip_ra_lock;
|
|
|
|
/* IP flags. */
|
|
#define IP_CE 0x8000 /* Flag: "Congestion" */
|
|
#define IP_DF 0x4000 /* Flag: "Don't Fragment" */
|
|
#define IP_MF 0x2000 /* Flag: "More Fragments" */
|
|
#define IP_OFFSET 0x1FFF /* "Fragment Offset" part */
|
|
|
|
#define IP_FRAG_TIME (30 * HZ) /* fragment lifetime */
|
|
|
|
struct msghdr;
|
|
struct net_device;
|
|
struct packet_type;
|
|
struct rtable;
|
|
struct sockaddr;
|
|
|
|
extern int igmp_mc_proc_init(void);
|
|
|
|
/*
|
|
* Functions provided by ip.c
|
|
*/
|
|
|
|
extern int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
|
|
__be32 saddr, __be32 daddr,
|
|
struct ip_options *opt);
|
|
extern int ip_rcv(struct sk_buff *skb, struct net_device *dev,
|
|
struct packet_type *pt, struct net_device *orig_dev);
|
|
extern int ip_local_deliver(struct sk_buff *skb);
|
|
extern int ip_mr_input(struct sk_buff *skb);
|
|
extern int ip_output(struct sk_buff *skb);
|
|
extern int ip_mc_output(struct sk_buff *skb);
|
|
extern int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *));
|
|
extern int ip_do_nat(struct sk_buff *skb);
|
|
extern void ip_send_check(struct iphdr *ip);
|
|
extern int __ip_local_out(struct sk_buff *skb);
|
|
extern int ip_local_out(struct sk_buff *skb);
|
|
extern int ip_queue_xmit(struct sk_buff *skb, int ipfragok);
|
|
extern void ip_init(void);
|
|
extern int ip_append_data(struct sock *sk,
|
|
int getfrag(void *from, char *to, int offset, int len,
|
|
int odd, struct sk_buff *skb),
|
|
void *from, int len, int protolen,
|
|
struct ipcm_cookie *ipc,
|
|
struct rtable *rt,
|
|
unsigned int flags);
|
|
extern int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb);
|
|
extern ssize_t ip_append_page(struct sock *sk, struct page *page,
|
|
int offset, size_t size, int flags);
|
|
extern int ip_push_pending_frames(struct sock *sk);
|
|
extern void ip_flush_pending_frames(struct sock *sk);
|
|
|
|
/* datagram.c */
|
|
extern int ip4_datagram_connect(struct sock *sk,
|
|
struct sockaddr *uaddr, int addr_len);
|
|
|
|
/*
|
|
* Map a multicast IP onto multicast MAC for type Token Ring.
|
|
* This conforms to RFC1469 Option 2 Multicasting i.e.
|
|
* using a functional address to transmit / receive
|
|
* multicast packets.
|
|
*/
|
|
|
|
static inline void ip_tr_mc_map(__be32 addr, char *buf)
|
|
{
|
|
buf[0]=0xC0;
|
|
buf[1]=0x00;
|
|
buf[2]=0x00;
|
|
buf[3]=0x04;
|
|
buf[4]=0x00;
|
|
buf[5]=0x00;
|
|
}
|
|
|
|
struct ip_reply_arg {
|
|
struct kvec iov[1];
|
|
__wsum csum;
|
|
int csumoffset; /* u16 offset of csum in iov[0].iov_base */
|
|
/* -1 if not needed */
|
|
int bound_dev_if;
|
|
};
|
|
|
|
void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *arg,
|
|
unsigned int len);
|
|
|
|
struct ipv4_config
|
|
{
|
|
int log_martians;
|
|
int no_pmtu_disc;
|
|
};
|
|
|
|
extern struct ipv4_config ipv4_config;
|
|
DECLARE_SNMP_STAT(struct ipstats_mib, ip_statistics);
|
|
#define IP_INC_STATS(field) SNMP_INC_STATS(ip_statistics, field)
|
|
#define IP_INC_STATS_BH(field) SNMP_INC_STATS_BH(ip_statistics, field)
|
|
#define IP_INC_STATS_USER(field) SNMP_INC_STATS_USER(ip_statistics, field)
|
|
#define IP_ADD_STATS_BH(field, val) SNMP_ADD_STATS_BH(ip_statistics, field, val)
|
|
DECLARE_SNMP_STAT(struct linux_mib, net_statistics);
|
|
#define NET_INC_STATS(field) SNMP_INC_STATS(net_statistics, field)
|
|
#define NET_INC_STATS_BH(field) SNMP_INC_STATS_BH(net_statistics, field)
|
|
#define NET_INC_STATS_USER(field) SNMP_INC_STATS_USER(net_statistics, field)
|
|
#define NET_ADD_STATS_BH(field, adnd) SNMP_ADD_STATS_BH(net_statistics, field, adnd)
|
|
#define NET_ADD_STATS_USER(field, adnd) SNMP_ADD_STATS_USER(net_statistics, field, adnd)
|
|
|
|
extern unsigned long snmp_fold_field(void *mib[], int offt);
|
|
extern int snmp_mib_init(void *ptr[2], size_t mibsize);
|
|
extern void snmp_mib_free(void *ptr[2]);
|
|
|
|
extern void inet_get_local_port_range(int *low, int *high);
|
|
|
|
extern int sysctl_ip_default_ttl;
|
|
extern int sysctl_ip_nonlocal_bind;
|
|
|
|
extern struct ctl_path net_ipv4_ctl_path[];
|
|
|
|
/* From inetpeer.c */
|
|
extern int inet_peer_threshold;
|
|
extern int inet_peer_minttl;
|
|
extern int inet_peer_maxttl;
|
|
extern int inet_peer_gc_mintime;
|
|
extern int inet_peer_gc_maxtime;
|
|
|
|
/* From ip_output.c */
|
|
extern int sysctl_ip_dynaddr;
|
|
|
|
extern void ipfrag_init(void);
|
|
|
|
#ifdef CONFIG_INET
|
|
#include <net/dst.h>
|
|
|
|
/* The function in 2.2 was invalid, producing wrong result for
|
|
* check=0xFEFF. It was noticed by Arthur Skawina _year_ ago. --ANK(000625) */
|
|
static inline
|
|
int ip_decrease_ttl(struct iphdr *iph)
|
|
{
|
|
u32 check = (__force u32)iph->check;
|
|
check += (__force u32)htons(0x0100);
|
|
iph->check = (__force __sum16)(check + (check>=0xFFFF));
|
|
return --iph->ttl;
|
|
}
|
|
|
|
static inline
|
|
int ip_dont_fragment(struct sock *sk, struct dst_entry *dst)
|
|
{
|
|
return (inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO ||
|
|
(inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT &&
|
|
!(dst_metric_locked(dst, RTAX_MTU))));
|
|
}
|
|
|
|
extern void __ip_select_ident(struct iphdr *iph, struct dst_entry *dst, int more);
|
|
|
|
static inline void ip_select_ident(struct iphdr *iph, struct dst_entry *dst, struct sock *sk)
|
|
{
|
|
if (iph->frag_off & htons(IP_DF)) {
|
|
/* 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.
|
|
*/
|
|
iph->id = (sk && inet_sk(sk)->daddr) ?
|
|
htons(inet_sk(sk)->id++) : 0;
|
|
} else
|
|
__ip_select_ident(iph, dst, 0);
|
|
}
|
|
|
|
static inline void ip_select_ident_more(struct iphdr *iph, struct dst_entry *dst, struct sock *sk, int more)
|
|
{
|
|
if (iph->frag_off & htons(IP_DF)) {
|
|
if (sk && inet_sk(sk)->daddr) {
|
|
iph->id = htons(inet_sk(sk)->id);
|
|
inet_sk(sk)->id += 1 + more;
|
|
} else
|
|
iph->id = 0;
|
|
} else
|
|
__ip_select_ident(iph, dst, more);
|
|
}
|
|
|
|
/*
|
|
* Map a multicast IP onto multicast MAC for type ethernet.
|
|
*/
|
|
|
|
static inline void ip_eth_mc_map(__be32 naddr, char *buf)
|
|
{
|
|
__u32 addr=ntohl(naddr);
|
|
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.
|
|
*/
|
|
|
|
static inline void ip_ib_mc_map(__be32 naddr, const unsigned char *broadcast, char *buf)
|
|
{
|
|
__u32 addr;
|
|
unsigned char scope = broadcast[5] & 0xF;
|
|
|
|
buf[0] = 0; /* Reserved */
|
|
buf[1] = 0xff; /* Multicast QPN */
|
|
buf[2] = 0xff;
|
|
buf[3] = 0xff;
|
|
addr = ntohl(naddr);
|
|
buf[4] = 0xff;
|
|
buf[5] = 0x10 | scope; /* scope from broadcast address */
|
|
buf[6] = 0x40; /* IPv4 signature */
|
|
buf[7] = 0x1b;
|
|
buf[8] = broadcast[8]; /* P_Key */
|
|
buf[9] = broadcast[9];
|
|
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;
|
|
}
|
|
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
#include <linux/ipv6.h>
|
|
#endif
|
|
|
|
static __inline__ void inet_reset_saddr(struct sock *sk)
|
|
{
|
|
inet_sk(sk)->rcv_saddr = inet_sk(sk)->saddr = 0;
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
if (sk->sk_family == PF_INET6) {
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
memset(&np->saddr, 0, sizeof(np->saddr));
|
|
memset(&np->rcv_saddr, 0, sizeof(np->rcv_saddr));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif
|
|
|
|
extern int ip_call_ra_chain(struct sk_buff *skb);
|
|
|
|
/*
|
|
* Functions provided by ip_fragment.c
|
|
*/
|
|
|
|
enum ip_defrag_users
|
|
{
|
|
IP_DEFRAG_LOCAL_DELIVER,
|
|
IP_DEFRAG_CALL_RA_CHAIN,
|
|
IP_DEFRAG_CONNTRACK_IN,
|
|
IP_DEFRAG_CONNTRACK_OUT,
|
|
IP_DEFRAG_VS_IN,
|
|
IP_DEFRAG_VS_OUT,
|
|
IP_DEFRAG_VS_FWD
|
|
};
|
|
|
|
int ip_defrag(struct sk_buff *skb, u32 user);
|
|
int ip_frag_mem(struct net *net);
|
|
int ip_frag_nqueues(struct net *net);
|
|
|
|
/*
|
|
* Functions provided by ip_forward.c
|
|
*/
|
|
|
|
extern int ip_forward(struct sk_buff *skb);
|
|
|
|
/*
|
|
* Functions provided by ip_options.c
|
|
*/
|
|
|
|
extern void ip_options_build(struct sk_buff *skb, struct ip_options *opt, __be32 daddr, struct rtable *rt, int is_frag);
|
|
extern int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb);
|
|
extern void ip_options_fragment(struct sk_buff *skb);
|
|
extern int ip_options_compile(struct net *net,
|
|
struct ip_options *opt, struct sk_buff *skb);
|
|
extern int ip_options_get(struct net *net, struct ip_options **optp,
|
|
unsigned char *data, int optlen);
|
|
extern int ip_options_get_from_user(struct net *net, struct ip_options **optp,
|
|
unsigned char __user *data, int optlen);
|
|
extern void ip_options_undo(struct ip_options * opt);
|
|
extern void ip_forward_options(struct sk_buff *skb);
|
|
extern int ip_options_rcv_srr(struct sk_buff *skb);
|
|
|
|
/*
|
|
* Functions provided by ip_sockglue.c
|
|
*/
|
|
|
|
extern void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb);
|
|
extern int ip_cmsg_send(struct net *net,
|
|
struct msghdr *msg, struct ipcm_cookie *ipc);
|
|
extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen);
|
|
extern int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen);
|
|
extern int compat_ip_setsockopt(struct sock *sk, int level,
|
|
int optname, char __user *optval, int optlen);
|
|
extern int compat_ip_getsockopt(struct sock *sk, int level,
|
|
int optname, char __user *optval, int __user *optlen);
|
|
extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *));
|
|
|
|
extern int ip_recv_error(struct sock *sk, struct msghdr *msg, int len);
|
|
extern void ip_icmp_error(struct sock *sk, struct sk_buff *skb, int err,
|
|
__be16 port, u32 info, u8 *payload);
|
|
extern void ip_local_error(struct sock *sk, int err, __be32 daddr, __be16 dport,
|
|
u32 info);
|
|
|
|
/* sysctl helpers - any sysctl which holds a value that ends up being
|
|
* fed into the routing cache should use these handlers.
|
|
*/
|
|
int ipv4_doint_and_flush(ctl_table *ctl, int write,
|
|
struct file* filp, void __user *buffer,
|
|
size_t *lenp, loff_t *ppos);
|
|
int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen,
|
|
void __user *oldval, size_t __user *oldlenp,
|
|
void __user *newval, size_t newlen);
|
|
#ifdef CONFIG_PROC_FS
|
|
extern int ip_misc_proc_init(void);
|
|
#endif
|
|
|
|
#endif /* _IP_H */
|