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 ping_portaddr_for_each_entry(__sk, node, list) \ 20 hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node) 21 22 /* 23 * gid_t is either uint or ushort. We want to pass it to 24 * proc_dointvec_minmax(), so it must not be larger than MAX_INT 25 */ 26 #define GID_T_MAX (((gid_t)~0U) >> 1) 27 28 /* Compatibility glue so we can support IPv6 when it's compiled as a module */ 29 struct pingv6_ops { 30 int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len, 31 int *addr_len); 32 void (*ip6_datagram_recv_common_ctl)(struct sock *sk, 33 struct msghdr *msg, 34 struct sk_buff *skb); 35 void (*ip6_datagram_recv_specific_ctl)(struct sock *sk, 36 struct msghdr *msg, 37 struct sk_buff *skb); 38 int (*icmpv6_err_convert)(u8 type, u8 code, int *err); 39 void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err, 40 __be16 port, u32 info, u8 *payload); 41 int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr, 42 const struct net_device *dev, int strict); 43 }; 44 45 struct ping_iter_state { 46 struct seq_net_private p; 47 int bucket; 48 sa_family_t family; 49 }; 50 51 extern struct proto ping_prot; 52 #if IS_ENABLED(CONFIG_IPV6) 53 extern struct pingv6_ops pingv6_ops; 54 #endif 55 56 struct pingfakehdr { 57 struct icmphdr icmph; 58 struct msghdr *msg; 59 sa_family_t family; 60 __wsum wcheck; 61 }; 62 63 int ping_get_port(struct sock *sk, unsigned short ident); 64 int ping_hash(struct sock *sk); 65 void ping_unhash(struct sock *sk); 66 67 int ping_init_sock(struct sock *sk); 68 void ping_close(struct sock *sk, long timeout); 69 int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len); 70 void ping_err(struct sk_buff *skb, int offset, u32 info); 71 int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd, 72 struct sk_buff *); 73 74 int ping_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int noblock, 75 int flags, int *addr_len); 76 int ping_common_sendmsg(int family, struct msghdr *msg, size_t len, 77 void *user_icmph, size_t icmph_len); 78 int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb); 79 bool ping_rcv(struct sk_buff *skb); 80 81 #ifdef CONFIG_PROC_FS 82 void *ping_seq_start(struct seq_file *seq, loff_t *pos, sa_family_t family); 83 void *ping_seq_next(struct seq_file *seq, void *v, loff_t *pos); 84 void ping_seq_stop(struct seq_file *seq, void *v); 85 86 int __init ping_proc_init(void); 87 void ping_proc_exit(void); 88 #endif 89 90 void __init ping_init(void); 91 int __init pingv6_init(void); 92 void pingv6_exit(void); 93 94 #endif /* _PING_H */ 95