Release 4.15 include/net/ip.h

/*
 * 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>


#define IPV4_MAX_PMTU		65535U		
/* RFC 2675, Section 5.1 */

#define IPV4_MIN_MTU		68			
/* RFC 791 */

struct sock;


struct inet_skb_parm {
	
int			iif;
	
struct ip_options	opt;		/* Compiled IP options          */
	
u16			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)

#define IPSKB_L3SLAVE		BIT(7)

	
u16			frag_max_size;
};



static inline bool ipv4_l3mdev_skb(u16 flags)
{
	return !!(flags & IPSKB_L3SLAVE);
}

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static inline unsigned int ip_hdrlen(const struct sk_buff *skb)
{
	return ip_hdr(skb)->ihl * 4;
}

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struct ipcm_cookie {
	
struct sockcm_cookie	sockc;
	
__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))

/* return enslaved device index if relevant */


static inline int inet_sdif(struct sk_buff *skb)
{
#if IS_ENABLED(CONFIG_NET_L3_MASTER_DEV)
	if (skb && ipv4_l3mdev_skb(IPCB(skb)->flags))
		return IPCB(skb)->iif;
#endif
	return 0;
}

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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 net *net, struct sock *sk, struct sk_buff *skb);
int ip_mc_output(struct net *net, 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 net *net, struct sock *sk, struct sk_buff *skb);
int ip_local_out(struct net *net, struct sock *sk, struct sk_buff *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);
}

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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);
}

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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);
}

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/* 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;
	
kuid_t	    uid;
}; 


#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;
}

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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(net, field)	__SNMP_INC_STATS64((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(net, field, val) __SNMP_ADD_STATS64((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(net, field, val) __SNMP_UPD_PO_STATS64((net)->mib.ip_statistics, field, val)

#define NET_INC_STATS(net, field)	SNMP_INC_STATS((net)->mib.net_statistics, field)

#define __NET_INC_STATS(net, field)	__SNMP_INC_STATS((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(net, field, adnd) __SNMP_ADD_STATS((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);

}

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static inline u64 snmp_fold_field64(void __percpu *mib, int offt, size_t syncp_off)
{
	return snmp_fold_field(mib, offt);
}
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#endif


#define snmp_get_cpu_field64_batch(buff64, stats_list, mib_statistic, offset) \
{ \
        int i, c; \
        for_each_possible_cpu(c) { \
                for (i = 0; stats_list[i].name; i++) \
                        buff64[i] += snmp_get_cpu_field64( \
                                        mib_statistic, \
                                        c, stats_list[i].entry, \
                                        offset); \
        } \
}


#define snmp_get_cpu_field_batch(buff, stats_list, mib_statistic) \
{ \
        int i, c; \
        for_each_possible_cpu(c) { \
                for (i = 0; stats_list[i].name; i++) \
                        buff[i] += snmp_get_cpu_field( \
                                                mib_statistic, \
                                                c, stats_list[i].entry); \
        } \
}

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);
}

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static inline bool sysctl_dev_name_is_allowed(const char *name)
{
	return strcmp(name, "default") != 0  && strcmp(name, "all") != 0;
}

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static inline int inet_prot_sock(struct net *net)
{
	return net->ipv4.sysctl_ip_prot_sock;
}

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#else


static inline int inet_is_local_reserved_port(struct net *net, int port)
{
	return 0;
}

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static inline int inet_prot_sock(struct net *net)
{
	return PROT_SOCK;
}
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#endif

__be32 inet_current_timestamp(void);

/* From inetpeer.c */
extern int inet_peer_threshold;
extern int inet_peer_minttl;
extern int inet_peer_maxttl;

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;
}

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#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;
}

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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)));
}

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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;
}

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static inline bool ip_sk_use_pmtu(const struct sock *sk)
{
	return inet_sk(sk)->pmtudisc < IP_PMTUDISC_PROBE;
}

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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;
}

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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(READ_ONCE(dst->dev->mtu), IP_MAX_MTU);
}

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static inline unsigned int ip_skb_dst_mtu(struct sock *sk,
					  const struct sk_buff *skb)
{
	if (!sk || !sk_fullsock(sk) || ip_sk_use_pmtu(sk)) {
		bool forwarding = IPCB(skb)->flags & IPSKB_FORWARDED;

		return ip_dst_mtu_maybe_forward(skb_dst(skb), forwarding);
	}

	return min(READ_ONCE(skb_dst(skb)->dev->mtu), IP_MAX_MTU);
}

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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);
	}
}

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static inline void ip_select_ident(struct net *net, struct sk_buff *skb,
				   struct sock *sk)
{
	ip_select_ident_segs(net, skb, sk, 1);
}

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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);
}

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/* 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;
}

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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);
}

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/*
 *      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;
}

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100.00%

/*
 *      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;
}

Contributors
Person
Tokens
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CommitProp
Roland Dreier
179
83.64%
1
33.33%
Rolf Manderscheid
29
13.55%
1
33.33%
Al Viro
6
2.80%
1
33.33%
Total
214
100.00%
3
100.00%



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));
}

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Timo Teräs
69
100.00%
1
100.00%
Total
69
100.00%
1
100.00%

#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
}

Contributors
Person
Tokens
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Commits
CommitProp
Arnaldo Carvalho de Melo
83
92.22%
2
40.00%
Eric Dumazet
7
7.78%
3
60.00%
Total
90
100.00%
5
100.00%

#endif



static inline unsigned int ipv4_addr_hash(__be32 ip)
{
	return (__force unsigned int) ip;
}

Contributors
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Tokens
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CommitProp
David Ahern
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%

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;
}

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Andy Zhou
27
100.00%
1
100.00%
Total
27
100.00%
1
100.00%

int ip_defrag(struct net *net, struct sk_buff *skb, u32 user);
#ifdef CONFIG_INET
struct sk_buff *ip_check_defrag(struct net *net, struct sk_buff *skb, u32 user);
#else


static inline struct sk_buff *ip_check_defrag(struct net *net, struct sk_buff *skb, u32 user)
{
	return skb;
}
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Person
Tokens
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Eric Dumazet
20
80.00%
1
50.00%
Eric W. Biedermann
5
20.00%
1
50.00%
Total
25
100.00%
2
100.00%

#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 net *net, struct ip_options *dopt,
		      struct sk_buff *skb, const struct ip_options *sopt);


static inline int ip_options_echo(struct net *net, struct ip_options *dopt,
				  struct sk_buff *skb)
{
	return __ip_options_echo(net, dopt, skb, &IPCB(skb)->opt);
}

Contributors
Person
Tokens
Prop
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CommitProp
Eric Dumazet
33
82.50%
1
50.00%
Paolo Abeni
7
17.50%
1
50.00%
Total
40
100.00%
2
100.00%

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 sock *sk,
			 struct sk_buff *skb, int tlen, int offset);
int ip_cmsg_send(struct sock *sk, 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->sk, skb, 0, 0);
}

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CommitProp
Tom Herbert
26
81.25%
1
33.33%
Paolo Abeni
4
12.50%
1
33.33%
Eric Dumazet
2
6.25%
1
33.33%
Total
32
100.00%
3
100.00%

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 */
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Linus Torvalds (pre-git)
734
21.63%
30
14.85%
Eric Dumazet
341
10.05%
33
16.34%
Hannes Frederic Sowa
257
7.57%
7
3.47%
Tom Herbert
213
6.28%
5
2.48%
Alexey Kuznetsov
200
5.89%
4
1.98%
Arnaldo Carvalho de Melo
190
5.60%
9
4.46%
Roland Dreier
180
5.30%
1
0.50%
Herbert Xu
151
4.45%
6
2.97%
David S. Miller
114
3.36%
15
7.43%
Américo Wang
96
2.83%
5
2.48%
Francesco Fusco
94
2.77%
2
0.99%
David Ahern
91
2.68%
4
1.98%
Timo Teräs
69
2.03%
1
0.50%
Patrick McHardy
69
2.03%
9
4.46%
Raghavendra K T
64
1.89%
1
0.50%
Eric W. Biedermann
64
1.89%
9
4.46%
Dmitry Mishin
48
1.41%
1
0.50%
Al Viro
44
1.30%
12
5.94%
KOVACS Krisztian
36
1.06%
2
0.99%
Krister Johansen
34
1.00%
1
0.50%
Neil Horman
29
0.85%
1
0.50%
Rolf Manderscheid
29
0.85%
1
0.50%
Andy Zhou
29
0.85%
2
0.99%
Pavel Emelyanov
27
0.80%
10
4.95%
Jia He
26
0.77%
1
0.50%
Paolo Abeni
21
0.62%
2
0.99%
Hideaki Yoshifuji / 吉藤英明
19
0.56%
2
0.99%
Denis V. Lunev
18
0.53%
3
1.49%
Ansis Atteka
18
0.53%
1
0.50%
Lorenzo Colitti
13
0.38%
2
0.99%
Stephen Hemminger
11
0.32%
1
0.50%
Steffen Klassert
9
0.27%
1
0.50%
Ravikiran G. Thirumalai
7
0.21%
1
0.50%
Shawn Bohrer
6
0.18%
1
0.50%
Soheil Hassas Yeganeh
6
0.18%
1
0.50%
Deepa Dinamani
6
0.18%
1
0.50%
Gao Feng
5
0.15%
1
0.50%
Shmulik Ladkani
5
0.15%
1
0.50%
Florian Westphal
4
0.12%
1
0.50%
James Morris
3
0.09%
1
0.50%
Alexey Dobriyan
3
0.09%
1
0.50%
Oliver Hartkopp
2
0.06%
1
0.50%
Satoru SATOH
2
0.06%
1
0.50%
Linus Torvalds
1
0.03%
1
0.50%
Rami Rosen
1
0.03%
1
0.50%
Lance Richardson
1
0.03%
1
0.50%
Patrick Ohly
1
0.03%
1
0.50%
Jiri Pirko
1
0.03%
1
0.50%
Tejun Heo
1
0.03%
1
0.50%
Jesper Juhl
1
0.03%
1
0.50%
Total
3394
100.00%
202
100.00%
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