forked from Minki/linux
591 lines
17 KiB
C
591 lines
17 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/route.h>
|
|
#include <net/snmp.h>
|
|
#include <net/flow.h>
|
|
#include <net/flow_dissector.h>
|
|
|
|
struct sock;
|
|
|
|
struct inet_skb_parm {
|
|
struct ip_options opt; /* Compiled IP options */
|
|
unsigned char flags;
|
|
|
|
#define IPSKB_FORWARDED BIT(0)
|
|
#define IPSKB_XFRM_TUNNEL_SIZE BIT(1)
|
|
#define IPSKB_XFRM_TRANSFORMED BIT(2)
|
|
#define IPSKB_FRAG_COMPLETE BIT(3)
|
|
#define IPSKB_REROUTED BIT(4)
|
|
#define IPSKB_DOREDIRECT BIT(5)
|
|
#define IPSKB_FRAG_PMTU BIT(6)
|
|
|
|
u16 frag_max_size;
|
|
};
|
|
|
|
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_rcu *opt;
|
|
__u8 tx_flags;
|
|
__u8 ttl;
|
|
__s16 tos;
|
|
char priority;
|
|
};
|
|
|
|
#define IPCB(skb) ((struct inet_skb_parm*)((skb)->cb))
|
|
#define PKTINFO_SKB_CB(skb) ((struct in_pktinfo *)((skb)->cb))
|
|
|
|
struct ip_ra_chain {
|
|
struct ip_ra_chain __rcu *next;
|
|
struct sock *sk;
|
|
union {
|
|
void (*destructor)(struct sock *);
|
|
struct sock *saved_sk;
|
|
};
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
extern struct ip_ra_chain __rcu *ip_ra_chain;
|
|
|
|
/* 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;
|
|
|
|
int igmp_mc_init(void);
|
|
|
|
/*
|
|
* Functions provided by ip.c
|
|
*/
|
|
|
|
int ip_build_and_send_pkt(struct sk_buff *skb, const struct sock *sk,
|
|
__be32 saddr, __be32 daddr,
|
|
struct ip_options_rcu *opt);
|
|
int ip_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt,
|
|
struct net_device *orig_dev);
|
|
int ip_local_deliver(struct sk_buff *skb);
|
|
int ip_mr_input(struct sk_buff *skb);
|
|
int ip_output(struct sock *sk, struct sk_buff *skb);
|
|
int ip_mc_output(struct sock *sk, struct sk_buff *skb);
|
|
int ip_do_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
|
|
int (*output)(struct net *, struct sock *, struct sk_buff *));
|
|
void ip_send_check(struct iphdr *ip);
|
|
int __ip_local_out(struct sk_buff *skb);
|
|
int ip_local_out_sk(struct sock *sk, struct sk_buff *skb);
|
|
static inline int ip_local_out(struct sk_buff *skb)
|
|
{
|
|
return ip_local_out_sk(skb->sk, skb);
|
|
}
|
|
|
|
int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl);
|
|
void ip_init(void);
|
|
int ip_append_data(struct sock *sk, struct flowi4 *fl4,
|
|
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);
|
|
int ip_generic_getfrag(void *from, char *to, int offset, int len, int odd,
|
|
struct sk_buff *skb);
|
|
ssize_t ip_append_page(struct sock *sk, struct flowi4 *fl4, struct page *page,
|
|
int offset, size_t size, int flags);
|
|
struct sk_buff *__ip_make_skb(struct sock *sk, struct flowi4 *fl4,
|
|
struct sk_buff_head *queue,
|
|
struct inet_cork *cork);
|
|
int ip_send_skb(struct net *net, struct sk_buff *skb);
|
|
int ip_push_pending_frames(struct sock *sk, struct flowi4 *fl4);
|
|
void ip_flush_pending_frames(struct sock *sk);
|
|
struct sk_buff *ip_make_skb(struct sock *sk, struct flowi4 *fl4,
|
|
int getfrag(void *from, char *to, int offset,
|
|
int len, int odd, struct sk_buff *skb),
|
|
void *from, int length, int transhdrlen,
|
|
struct ipcm_cookie *ipc, struct rtable **rtp,
|
|
unsigned int flags);
|
|
|
|
static inline struct sk_buff *ip_finish_skb(struct sock *sk, struct flowi4 *fl4)
|
|
{
|
|
return __ip_make_skb(sk, fl4, &sk->sk_write_queue, &inet_sk(sk)->cork.base);
|
|
}
|
|
|
|
static inline __u8 get_rttos(struct ipcm_cookie* ipc, struct inet_sock *inet)
|
|
{
|
|
return (ipc->tos != -1) ? RT_TOS(ipc->tos) : RT_TOS(inet->tos);
|
|
}
|
|
|
|
static inline __u8 get_rtconn_flags(struct ipcm_cookie* ipc, struct sock* sk)
|
|
{
|
|
return (ipc->tos != -1) ? RT_CONN_FLAGS_TOS(sk, ipc->tos) : RT_CONN_FLAGS(sk);
|
|
}
|
|
|
|
/* datagram.c */
|
|
int __ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
|
|
int ip4_datagram_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len);
|
|
|
|
void ip4_datagram_release_cb(struct sock *sk);
|
|
|
|
struct ip_reply_arg {
|
|
struct kvec iov[1];
|
|
int flags;
|
|
__wsum csum;
|
|
int csumoffset; /* u16 offset of csum in iov[0].iov_base */
|
|
/* -1 if not needed */
|
|
int bound_dev_if;
|
|
u8 tos;
|
|
};
|
|
|
|
#define IP_REPLY_ARG_NOSRCCHECK 1
|
|
|
|
static inline __u8 ip_reply_arg_flowi_flags(const struct ip_reply_arg *arg)
|
|
{
|
|
return (arg->flags & IP_REPLY_ARG_NOSRCCHECK) ? FLOWI_FLAG_ANYSRC : 0;
|
|
}
|
|
|
|
void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
|
|
const struct ip_options *sopt,
|
|
__be32 daddr, __be32 saddr,
|
|
const struct ip_reply_arg *arg,
|
|
unsigned int len);
|
|
|
|
#define IP_INC_STATS(net, field) SNMP_INC_STATS64((net)->mib.ip_statistics, field)
|
|
#define IP_INC_STATS_BH(net, field) SNMP_INC_STATS64_BH((net)->mib.ip_statistics, field)
|
|
#define IP_ADD_STATS(net, field, val) SNMP_ADD_STATS64((net)->mib.ip_statistics, field, val)
|
|
#define IP_ADD_STATS_BH(net, field, val) SNMP_ADD_STATS64_BH((net)->mib.ip_statistics, field, val)
|
|
#define IP_UPD_PO_STATS(net, field, val) SNMP_UPD_PO_STATS64((net)->mib.ip_statistics, field, val)
|
|
#define IP_UPD_PO_STATS_BH(net, field, val) SNMP_UPD_PO_STATS64_BH((net)->mib.ip_statistics, field, val)
|
|
#define NET_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.net_statistics, field)
|
|
#define NET_INC_STATS_BH(net, field) SNMP_INC_STATS_BH((net)->mib.net_statistics, field)
|
|
#define NET_INC_STATS_USER(net, field) SNMP_INC_STATS_USER((net)->mib.net_statistics, field)
|
|
#define NET_ADD_STATS(net, field, adnd) SNMP_ADD_STATS((net)->mib.net_statistics, field, adnd)
|
|
#define NET_ADD_STATS_BH(net, field, adnd) SNMP_ADD_STATS_BH((net)->mib.net_statistics, field, adnd)
|
|
#define NET_ADD_STATS_USER(net, field, adnd) SNMP_ADD_STATS_USER((net)->mib.net_statistics, field, adnd)
|
|
|
|
u64 snmp_get_cpu_field(void __percpu *mib, int cpu, int offct);
|
|
unsigned long snmp_fold_field(void __percpu *mib, int offt);
|
|
#if BITS_PER_LONG==32
|
|
u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct,
|
|
size_t syncp_offset);
|
|
u64 snmp_fold_field64(void __percpu *mib, int offt, size_t sync_off);
|
|
#else
|
|
static inline u64 snmp_get_cpu_field64(void __percpu *mib, int cpu, int offct,
|
|
size_t syncp_offset)
|
|
{
|
|
return snmp_get_cpu_field(mib, cpu, offct);
|
|
|
|
}
|
|
|
|
static inline u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_off)
|
|
{
|
|
return snmp_fold_field(mib, offt);
|
|
}
|
|
#endif
|
|
|
|
void inet_get_local_port_range(struct net *net, int *low, int *high);
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
static inline int inet_is_local_reserved_port(struct net *net, int port)
|
|
{
|
|
if (!net->ipv4.sysctl_local_reserved_ports)
|
|
return 0;
|
|
return test_bit(port, net->ipv4.sysctl_local_reserved_ports);
|
|
}
|
|
|
|
static inline bool sysctl_dev_name_is_allowed(const char *name)
|
|
{
|
|
return strcmp(name, "default") != 0 && strcmp(name, "all") != 0;
|
|
}
|
|
|
|
#else
|
|
static inline int inet_is_local_reserved_port(struct net *net, int port)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* From inetpeer.c */
|
|
extern int inet_peer_threshold;
|
|
extern int inet_peer_minttl;
|
|
extern int inet_peer_maxttl;
|
|
|
|
/* From ip_input.c */
|
|
extern int sysctl_ip_early_demux;
|
|
|
|
/* From ip_output.c */
|
|
extern int sysctl_ip_dynaddr;
|
|
|
|
void ipfrag_init(void);
|
|
|
|
void ip_static_sysctl_init(void);
|
|
|
|
#define IP4_REPLY_MARK(net, mark) \
|
|
((net)->ipv4.sysctl_fwmark_reflect ? (mark) : 0)
|
|
|
|
static inline bool ip_is_fragment(const struct iphdr *iph)
|
|
{
|
|
return (iph->frag_off & htons(IP_MF | IP_OFFSET)) != 0;
|
|
}
|
|
|
|
#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(const struct sock *sk, const struct dst_entry *dst)
|
|
{
|
|
u8 pmtudisc = READ_ONCE(inet_sk(sk)->pmtudisc);
|
|
|
|
return pmtudisc == IP_PMTUDISC_DO ||
|
|
(pmtudisc == IP_PMTUDISC_WANT &&
|
|
!(dst_metric_locked(dst, RTAX_MTU)));
|
|
}
|
|
|
|
static inline bool ip_sk_accept_pmtu(const struct sock *sk)
|
|
{
|
|
return inet_sk(sk)->pmtudisc != IP_PMTUDISC_INTERFACE &&
|
|
inet_sk(sk)->pmtudisc != IP_PMTUDISC_OMIT;
|
|
}
|
|
|
|
static inline bool ip_sk_use_pmtu(const struct sock *sk)
|
|
{
|
|
return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE;
|
|
}
|
|
|
|
static inline bool ip_sk_ignore_df(const struct sock *sk)
|
|
{
|
|
return inet_sk(sk)->pmtudisc < IP_PMTUDISC_DO ||
|
|
inet_sk(sk)->pmtudisc == IP_PMTUDISC_OMIT;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
u32 ip_idents_reserve(u32 hash, int segs);
|
|
void __ip_select_ident(struct net *net, struct iphdr *iph, int segs);
|
|
|
|
static inline void ip_select_ident_segs(struct net *net, struct sk_buff *skb,
|
|
struct sock *sk, int segs)
|
|
{
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
if ((iph->frag_off & htons(IP_DF)) && !skb->ignore_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.
|
|
*/
|
|
if (sk && inet_sk(sk)->inet_daddr) {
|
|
iph->id = htons(inet_sk(sk)->inet_id);
|
|
inet_sk(sk)->inet_id += segs;
|
|
} else {
|
|
iph->id = 0;
|
|
}
|
|
} else {
|
|
__ip_select_ident(net, iph, segs);
|
|
}
|
|
}
|
|
|
|
static inline void ip_select_ident(struct net *net, struct sk_buff *skb,
|
|
struct sock *sk)
|
|
{
|
|
ip_select_ident_segs(net, skb, sk, 1);
|
|
}
|
|
|
|
static inline __wsum inet_compute_pseudo(struct sk_buff *skb, int proto)
|
|
{
|
|
return csum_tcpudp_nofold(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr,
|
|
skb->len, proto, 0);
|
|
}
|
|
|
|
/* copy IPv4 saddr & daddr to flow_keys, possibly using 64bit load/store
|
|
* Equivalent to : flow->v4addrs.src = iph->saddr;
|
|
* flow->v4addrs.dst = iph->daddr;
|
|
*/
|
|
static inline void iph_to_flow_copy_v4addrs(struct flow_keys *flow,
|
|
const struct iphdr *iph)
|
|
{
|
|
BUILD_BUG_ON(offsetof(typeof(flow->addrs), v4addrs.dst) !=
|
|
offsetof(typeof(flow->addrs), v4addrs.src) +
|
|
sizeof(flow->addrs.v4addrs.src));
|
|
memcpy(&flow->addrs.v4addrs, &iph->saddr, sizeof(flow->addrs.v4addrs));
|
|
flow->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
|
|
}
|
|
|
|
static inline __wsum inet_gro_compute_pseudo(struct sk_buff *skb, int proto)
|
|
{
|
|
const struct iphdr *iph = skb_gro_network_header(skb);
|
|
|
|
return csum_tcpudp_nofold(iph->saddr, iph->daddr,
|
|
skb_gro_len(skb), proto, 0);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
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));
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
#include <linux/ipv6.h>
|
|
#endif
|
|
|
|
static __inline__ void inet_reset_saddr(struct sock *sk)
|
|
{
|
|
inet_sk(sk)->inet_rcv_saddr = inet_sk(sk)->inet_saddr = 0;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
if (sk->sk_family == PF_INET6) {
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
|
|
memset(&np->saddr, 0, sizeof(np->saddr));
|
|
memset(&sk->sk_v6_rcv_saddr, 0, sizeof(sk->sk_v6_rcv_saddr));
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif
|
|
|
|
static inline unsigned int ipv4_addr_hash(__be32 ip)
|
|
{
|
|
return (__force unsigned int) ip;
|
|
}
|
|
|
|
bool 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_IN_END = IP_DEFRAG_CONNTRACK_IN + USHRT_MAX,
|
|
IP_DEFRAG_CONNTRACK_OUT,
|
|
__IP_DEFRAG_CONNTRACK_OUT_END = IP_DEFRAG_CONNTRACK_OUT + USHRT_MAX,
|
|
IP_DEFRAG_CONNTRACK_BRIDGE_IN,
|
|
__IP_DEFRAG_CONNTRACK_BRIDGE_IN = IP_DEFRAG_CONNTRACK_BRIDGE_IN + USHRT_MAX,
|
|
IP_DEFRAG_VS_IN,
|
|
IP_DEFRAG_VS_OUT,
|
|
IP_DEFRAG_VS_FWD,
|
|
IP_DEFRAG_AF_PACKET,
|
|
IP_DEFRAG_MACVLAN,
|
|
};
|
|
|
|
/* Return true if the value of 'user' is between 'lower_bond'
|
|
* and 'upper_bond' inclusively.
|
|
*/
|
|
static inline bool ip_defrag_user_in_between(u32 user,
|
|
enum ip_defrag_users lower_bond,
|
|
enum ip_defrag_users upper_bond)
|
|
{
|
|
return user >= lower_bond && user <= upper_bond;
|
|
}
|
|
|
|
int ip_defrag(struct sk_buff *skb, u32 user);
|
|
#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
|
|
int ip_frag_mem(struct net *net);
|
|
|
|
/*
|
|
* Functions provided by ip_forward.c
|
|
*/
|
|
|
|
int ip_forward(struct sk_buff *skb);
|
|
|
|
/*
|
|
* Functions provided by ip_options.c
|
|
*/
|
|
|
|
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,
|
|
const struct ip_options *sopt);
|
|
static inline int ip_options_echo(struct ip_options *dopt, struct sk_buff *skb)
|
|
{
|
|
return __ip_options_echo(dopt, skb, &IPCB(skb)->opt);
|
|
}
|
|
|
|
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);
|
|
|
|
/*
|
|
* Functions provided by ip_sockglue.c
|
|
*/
|
|
|
|
void ipv4_pktinfo_prepare(const struct sock *sk, struct sk_buff *skb);
|
|
void ip_cmsg_recv_offset(struct msghdr *msg, struct sk_buff *skb, int offset);
|
|
int ip_cmsg_send(struct net *net, struct msghdr *msg,
|
|
struct ipcm_cookie *ipc, bool allow_ipv6);
|
|
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 *));
|
|
|
|
int ip_recv_error(struct sock *sk, struct msghdr *msg, int len, int *addr_len);
|
|
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);
|
|
|
|
static inline void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb)
|
|
{
|
|
ip_cmsg_recv_offset(msg, skb, 0);
|
|
}
|
|
|
|
bool icmp_global_allow(void);
|
|
extern int sysctl_icmp_msgs_per_sec;
|
|
extern int sysctl_icmp_msgs_burst;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
int ip_misc_proc_init(void);
|
|
#endif
|
|
|
|
#endif /* _IP_H */
|