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 void (*ip6_datagram_recv_common_ctl)(struct sock *sk, 25 struct msghdr *msg, 26 struct sk_buff *skb); 27 void (*ip6_datagram_recv_specific_ctl)(struct sock *sk, 28 struct msghdr *msg, 29 struct sk_buff *skb); 30 int (*icmpv6_err_convert)(u8 type, u8 code, int *err); 31 void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err, 32 __be16 port, u32 info, u8 *payload); 33 int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr, 34 const struct net_device *dev, int strict); 35 }; 36 37 struct ping_iter_state { 38 struct seq_net_private p; 39 int bucket; 40 sa_family_t family; 41 }; 42 43 extern struct proto ping_prot; 44 #if IS_ENABLED(CONFIG_IPV6) 45 extern struct pingv6_ops pingv6_ops; 46 #endif 47 48 struct pingfakehdr { 49 struct icmphdr icmph; 50 struct msghdr *msg; 51 sa_family_t family; 52 __wsum wcheck; 53 }; 54 55 int ping_get_port(struct sock *sk, unsigned short ident); 56 void ping_unhash(struct sock *sk); 57 58 int ping_init_sock(struct sock *sk); 59 void ping_close(struct sock *sk, long timeout); 60 int ping_bind(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len); 61 void ping_err(struct sk_buff *skb, int offset, u32 info); 62 int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd, 63 struct sk_buff *); 64 65 int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 66 int flags); 67 int ping_common_sendmsg(int family, struct msghdr *msg, size_t len, 68 void *user_icmph, size_t icmph_len); 69 int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb); 70 enum skb_drop_reason ping_rcv(struct sk_buff *skb); 71 72 #ifdef CONFIG_PROC_FS 73 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family); 74 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos); 75 void ping_seq_stop(struct seq_file *seq, void *v); 76 77 int __init ping_proc_init(void); 78 void ping_proc_exit(void); 79 #endif 80 81 void __init ping_init(void); 82 int __init pingv6_init(void); 83 void pingv6_exit(void); 84 85 #endif /* _PING_H */ 86