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 16 #include <net/icmp.h> 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 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 *addr_len); 36 void (*ip6_datagram_recv_common_ctl)(struct sock *sk, 37 struct msghdr *msg, 38 struct sk_buff *skb); 39 void (*ip6_datagram_recv_specific_ctl)(struct sock *sk, 40 struct msghdr *msg, 41 struct sk_buff *skb); 42 int (*icmpv6_err_convert)(u8 type, u8 code, int *err); 43 void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err, 44 __be16 port, u32 info, u8 *payload); 45 int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr, 46 const struct net_device *dev, int strict); 47 }; 48 49 struct ping_iter_state { 50 struct seq_net_private p; 51 int bucket; 52 sa_family_t family; 53 }; 54 55 extern struct proto ping_prot; 56 #if IS_ENABLED(CONFIG_IPV6) 57 extern struct pingv6_ops pingv6_ops; 58 #endif 59 60 struct pingfakehdr { 61 struct icmphdr icmph; 62 struct msghdr *msg; 63 sa_family_t family; 64 __wsum wcheck; 65 }; 66 67 int ping_get_port(struct sock *sk, unsigned short ident); 68 int 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 sock *sk, struct msghdr *msg, size_t len, int noblock, 79 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_queue_rcv_skb(struct sock *sk, struct sk_buff *skb); 83 bool ping_rcv(struct sk_buff *skb); 84 85 #ifdef CONFIG_PROC_FS 86 struct ping_seq_afinfo { 87 char *name; 88 sa_family_t family; 89 const struct file_operations *seq_fops; 90 const struct seq_operations seq_ops; 91 }; 92 93 extern const struct file_operations ping_seq_fops; 94 95 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family); 96 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos); 97 void ping_seq_stop(struct seq_file *seq, void *v); 98 int ping_proc_register(struct net *net, struct ping_seq_afinfo *afinfo); 99 void ping_proc_unregister(struct net *net, struct ping_seq_afinfo *afinfo); 100 101 int __init ping_proc_init(void); 102 void ping_proc_exit(void); 103 #endif 104 105 void __init ping_init(void); 106 int __init pingv6_init(void); 107 void pingv6_exit(void); 108 109 #endif /* _PING_H */ 110