[mirror_ubuntu-bionic-kernel.git] / include / net / ping.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 "ping" module.
 *
 *		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 _PING_H
#define _PING_H

#include <net/icmp.h>
#include <net/netns/hash.h>

/* PING_HTABLE_SIZE must be power of 2 */
#define PING_HTABLE_SIZE 	64
#define PING_HTABLE_MASK 	(PING_HTABLE_SIZE-1)

#define ping_portaddr_for_each_entry(__sk, node, list) \
	hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)

/*
 * gid_t is either uint or ushort.  We want to pass it to
 * proc_dointvec_minmax(), so it must not be larger than MAX_INT
 */
#define GID_T_MAX (((gid_t)~0U) >> 1)

/* Compatibility glue so we can support IPv6 when it's compiled as a module */
struct pingv6_ops {
	int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len);
	int (*ip6_datagram_recv_ctl)(struct sock *sk, struct msghdr *msg,
				     struct sk_buff *skb);
	int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
	void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
				__be16 port, u32 info, u8 *payload);
	int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
			     struct net_device *dev, int strict);
};

struct ping_table {
	struct hlist_nulls_head	hash[PING_HTABLE_SIZE];
	rwlock_t		lock;
};

struct ping_iter_state {
	struct seq_net_private  p;
	int			bucket;
};

extern struct proto ping_prot;
extern struct ping_table ping_table;
#if IS_ENABLED(CONFIG_IPV6)
extern struct pingv6_ops pingv6_ops;
#endif

struct pingfakehdr {
	struct icmphdr icmph;
	struct iovec *iov;
	sa_family_t family;
	__wsum wcheck;
};

int  ping_get_port(struct sock *sk, unsigned short ident);
void ping_hash(struct sock *sk);
void ping_unhash(struct sock *sk);

int  ping_init_sock(struct sock *sk);
void ping_close(struct sock *sk, long timeout);
int  ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
void ping_err(struct sk_buff *skb, int offset, u32 info);
int  ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
		  struct sk_buff *);

int  ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
		  size_t len, int noblock, int flags, int *addr_len);
int  ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
			 void *user_icmph, size_t icmph_len);
int  ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
		     size_t len);
int  ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
		     size_t len);
int  ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
void ping_rcv(struct sk_buff *skb);

#ifdef CONFIG_PROC_FS
extern int __init ping_proc_init(void);
extern void ping_proc_exit(void);
#endif

void __init ping_init(void);
int  __init pingv6_init(void);
void pingv6_exit(void);

#endif /* _PING_H */
Commit	Line	Data
c319b4d7 VK	1	/*
	2	* INET An implementation of the TCP/IP protocol suite for the LINUX
	3	* operating system. INET is implemented using the BSD Socket
	4	* interface as the means of communication with the user level.
	5	*
	6	* Definitions for the "ping" module.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* as published by the Free Software Foundation; either version
	11	* 2 of the License, or (at your option) any later version.
	12	*/
	13	#ifndef _PING_H
	14	#define _PING_H
	15
6d0bfe22	16	#include <net/icmp.h>
c319b4d7 VK	17	#include <net/netns/hash.h>
	18
	19	/* PING_HTABLE_SIZE must be power of 2 */
	20	#define PING_HTABLE_SIZE 64
	21	#define PING_HTABLE_MASK (PING_HTABLE_SIZE-1)
	22
	23	#define ping_portaddr_for_each_entry(__sk, node, list) \
	24	hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
	25
	26	/*
	27	* gid_t is either uint or ushort. We want to pass it to
	28	* proc_dointvec_minmax(), so it must not be larger than MAX_INT
	29	*/
	30	#define GID_T_MAX (((gid_t)~0U) >> 1)
	31
6d0bfe22 LC	32	/* Compatibility glue so we can support IPv6 when it's compiled as a module */
	33	struct pingv6_ops {
	34	int (ipv6_recv_error)(struct sock sk, struct msghdr *msg, int len);
	35	int (ip6_datagram_recv_ctl)(struct sock sk, struct msghdr *msg,
	36	struct sk_buff *skb);
	37	int (icmpv6_err_convert)(u8 type, u8 code, int err);
	38	void (ipv6_icmp_error)(struct sock sk, struct sk_buff *skb, int err,
	39	__be16 port, u32 info, u8 *payload);
	40	int (ipv6_chk_addr)(struct net net, const struct in6_addr *addr,
	41	struct net_device *dev, int strict);
	42	};
	43
c319b4d7 VK	44	struct ping_table {
	45	struct hlist_nulls_head hash[PING_HTABLE_SIZE];
	46	rwlock_t lock;
	47	};
	48
	49	struct ping_iter_state {
	50	struct seq_net_private p;
	51	int bucket;
	52	};
	53
	54	extern struct proto ping_prot;
6d0bfe22 LC	55	extern struct ping_table ping_table;
	56	#if IS_ENABLED(CONFIG_IPV6)
	57	extern struct pingv6_ops pingv6_ops;
	58	#endif
c319b4d7	59
6d0bfe22 LC	60	struct pingfakehdr {
	61	struct icmphdr icmph;
	62	struct iovec *iov;
	63	sa_family_t family;
	64	__wsum wcheck;
	65	};
c319b4d7	66
6d0bfe22 LC	67	int ping_get_port(struct sock *sk, unsigned short ident);
	68	void ping_hash(struct sock *sk);
	69	void ping_unhash(struct sock *sk);
	70
	71	int ping_init_sock(struct sock *sk);
	72	void ping_close(struct sock *sk, long timeout);
	73	int ping_bind(struct sock sk, struct sockaddr uaddr, int addr_len);
	74	void ping_err(struct sk_buff *skb, int offset, u32 info);
	75	int ping_getfrag(void from, char to, int offset, int fraglen, int odd,
	76	struct sk_buff *);
	77
	78	int ping_recvmsg(struct kiocb iocb, struct sock sk, struct msghdr *msg,
	79	size_t len, int noblock, int flags, int *addr_len);
	80	int ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
	81	void *user_icmph, size_t icmph_len);
	82	int ping_v4_sendmsg(struct kiocb iocb, struct sock sk, struct msghdr *msg,
	83	size_t len);
	84	int ping_v6_sendmsg(struct kiocb iocb, struct sock sk, struct msghdr *msg,
	85	size_t len);
	86	int ping_queue_rcv_skb(struct sock sk, struct sk_buff skb);
	87	void ping_rcv(struct sk_buff *skb);
c319b4d7	88
c319b4d7 VK	89	#ifdef CONFIG_PROC_FS
	90	extern int __init ping_proc_init(void);
	91	extern void ping_proc_exit(void);
	92	#endif
	93
	94	void __init ping_init(void);
6d0bfe22 LC	95	int __init pingv6_init(void);
6d0bfe22 LC	96	void pingv6_exit(void);
c319b4d7 VK	97
c319b4d7 VK	98	#endif /* _PING_H */