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 /* 20 * gid_t is either uint or ushort. We want to pass it to 21 * proc_dointvec_minmax(), so it must not be larger than MAX_INT 22 */ 23 #define GID_T_MAX (((gid_t)~0U) >> 1) 24 25 /* Compatibility glue so we can support IPv6 when it's compiled as a module */ 26 struct pingv6_ops { 27 int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len, 28 int *addr_len); 29 void (*ip6_datagram_recv_common_ctl)(struct sock *sk, 30 struct msghdr *msg, 31 struct sk_buff *skb); 32 void (*ip6_datagram_recv_specific_ctl)(struct sock *sk, 33 struct msghdr *msg, 34 struct sk_buff *skb); 35 int (*icmpv6_err_convert)(u8 type, u8 code, int *err); 36 void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err, 37 __be16 port, u32 info, u8 *payload); 38 int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr, 39 const struct net_device *dev, int strict); 40 }; 41 42 struct ping_iter_state { 43 struct seq_net_private p; 44 int bucket; 45 sa_family_t family; 46 }; 47 48 extern struct proto ping_prot; 49 #if IS_ENABLED(CONFIG_IPV6) 50 extern struct pingv6_ops pingv6_ops; 51 #endif 52 53 struct pingfakehdr { 54 struct icmphdr icmph; 55 struct msghdr *msg; 56 sa_family_t family; 57 __wsum wcheck; 58 }; 59 60 int ping_get_port(struct sock *sk, unsigned short ident); 61 int ping_hash(struct sock *sk); 62 void ping_unhash(struct sock *sk); 63 64 int ping_init_sock(struct sock *sk); 65 void ping_close(struct sock *sk, long timeout); 66 int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len); 67 void ping_err(struct sk_buff *skb, int offset, u32 info); 68 int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd, 69 struct sk_buff *); 70 71 int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, 72 int flags, int *addr_len); 73 int ping_common_sendmsg(int family, struct msghdr *msg, size_t len, 74 void *user_icmph, size_t icmph_len); 75 int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb); 76 enum skb_drop_reason ping_rcv(struct sk_buff *skb); 77 78 #ifdef CONFIG_PROC_FS 79 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family); 80 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos); 81 void ping_seq_stop(struct seq_file *seq, void *v); 82 83 int __init ping_proc_init(void); 84 void ping_proc_exit(void); 85 #endif 86 87 void __init ping_init(void); 88 int __init pingv6_init(void); 89 void pingv6_exit(void); 90 91 #endif /* _PING_H */ 92