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 (*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 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; 55 extern struct ping_table ping_table; 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 iovec *iov; 63 sa_family_t family; 64 __wsum wcheck; 65 }; 66 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 void ping_v4_err(struct sk_buff *skb, u32 info); 76 int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd, 77 struct sk_buff *); 78 79 int ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 80 size_t len, int noblock, int flags, int *addr_len); 81 int ping_common_sendmsg(int family, struct msghdr *msg, size_t len, 82 void *user_icmph, size_t icmph_len); 83 int ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 84 size_t len); 85 int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, 86 size_t len); 87 int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb); 88 void ping_rcv(struct sk_buff *skb); 89 90 #ifdef CONFIG_PROC_FS 91 extern int __init ping_proc_init(void); 92 extern void ping_proc_exit(void); 93 #endif 94 95 void __init ping_init(void); 96 int __init pingv6_init(void); 97 void pingv6_exit(void); 98 99 #endif /* _PING_H */ 100