1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Definitions for the "ping" module.
8 */
9 #ifndef _PING_H
10 #define _PING_H
11
12 #include <net/icmp.h>
13 #include <net/netns/hash.h>
14
15 /* PING_HTABLE_SIZE must be power of 2 */
16 #define PING_HTABLE_SIZE 64
17 #define PING_HTABLE_MASK (PING_HTABLE_SIZE-1)
18
19 #define GID_T_MAX (((gid_t)~0U) - 1)
20
21 /* Compatibility glue so we can support IPv6 when it's compiled as a module */
22 struct pingv6_ops {
23 int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len,
24 int *addr_len);
25 void (*ip6_datagram_recv_common_ctl)(struct sock *sk,
26 struct msghdr *msg,
27 struct sk_buff *skb);
28 void (*ip6_datagram_recv_specific_ctl)(struct sock *sk,
29 struct msghdr *msg,
30 struct sk_buff *skb);
31 int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
32 void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
33 __be16 port, u32 info, u8 *payload);
34 int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
35 const struct net_device *dev, int strict);
36 };
37
38 struct ping_iter_state {
39 struct seq_net_private p;
40 int bucket;
41 sa_family_t family;
42 };
43
44 extern struct proto ping_prot;
45 #if IS_ENABLED(CONFIG_IPV6)
46 extern struct pingv6_ops pingv6_ops;
47 #endif
48
49 struct pingfakehdr {
50 struct icmphdr icmph;
51 struct msghdr *msg;
52 sa_family_t family;
53 __wsum wcheck;
54 };
55
56 int ping_get_port(struct sock *sk, unsigned short ident);
57 int ping_hash(struct sock *sk);
58 void ping_unhash(struct sock *sk);
59
60 int ping_init_sock(struct sock *sk);
61 void ping_close(struct sock *sk, long timeout);
62 int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
63 void ping_err(struct sk_buff *skb, int offset, u32 info);
64 int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
65 struct sk_buff *);
66
67 int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
68 int flags, int *addr_len);
69 int ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
70 void *user_icmph, size_t icmph_len);
71 int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
72 enum skb_drop_reason ping_rcv(struct sk_buff *skb);
73
74 #ifdef CONFIG_PROC_FS
75 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family);
76 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos);
77 void ping_seq_stop(struct seq_file *seq, void *v);
78
79 int __init ping_proc_init(void);
80 void ping_proc_exit(void);
81 #endif
82
83 void __init ping_init(void);
84 int __init pingv6_init(void);
85 void pingv6_exit(void);
86
87 #endif /* _PING_H */
88
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