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6d0bfe2261
This adds the ability to send ICMPv6 echo requests without a
raw socket. The equivalent ability for ICMPv4 was added in
2011.
Instead of having separate code paths for IPv4 and IPv6, make
most of the code in net/ipv4/ping.c dual-stack and only add a
few IPv6-specific bits (like the protocol definition) to a new
net/ipv6/ping.c. Hopefully this will reduce divergence and/or
duplication of bugs in the future.
Caveats:
- Setting options via ancillary data (e.g., using IPV6_PKTINFO
to specify the outgoing interface) is not yet supported.
- There are no separate security settings for IPv4 and IPv6;
everything is controlled by /proc/net/ipv4/ping_group_range.
- The proc interface does not yet display IPv6 ping sockets
properly.
Tested with a patched copy of ping6 and using raw socket calls.
Compiles and works with all of CONFIG_IPV6={n,m,y}.
Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Definitions for the "ping" module.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _PING_H
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#define _PING_H
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#include <net/icmp.h>
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#include <net/netns/hash.h>
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/* PING_HTABLE_SIZE must be power of 2 */
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#define PING_HTABLE_SIZE 64
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#define PING_HTABLE_MASK (PING_HTABLE_SIZE-1)
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#define ping_portaddr_for_each_entry(__sk, node, list) \
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hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node)
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/*
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* gid_t is either uint or ushort. We want to pass it to
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* proc_dointvec_minmax(), so it must not be larger than MAX_INT
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*/
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#define GID_T_MAX (((gid_t)~0U) >> 1)
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/* Compatibility glue so we can support IPv6 when it's compiled as a module */
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struct pingv6_ops {
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int (*ipv6_recv_error)(struct sock *sk, struct msghdr *msg, int len);
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int (*ip6_datagram_recv_ctl)(struct sock *sk, struct msghdr *msg,
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struct sk_buff *skb);
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int (*icmpv6_err_convert)(u8 type, u8 code, int *err);
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void (*ipv6_icmp_error)(struct sock *sk, struct sk_buff *skb, int err,
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__be16 port, u32 info, u8 *payload);
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int (*ipv6_chk_addr)(struct net *net, const struct in6_addr *addr,
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struct net_device *dev, int strict);
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};
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struct ping_table {
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struct hlist_nulls_head hash[PING_HTABLE_SIZE];
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rwlock_t lock;
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};
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struct ping_iter_state {
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struct seq_net_private p;
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int bucket;
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};
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extern struct proto ping_prot;
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extern struct ping_table ping_table;
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#if IS_ENABLED(CONFIG_IPV6)
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extern struct pingv6_ops pingv6_ops;
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#endif
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struct pingfakehdr {
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struct icmphdr icmph;
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struct iovec *iov;
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sa_family_t family;
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__wsum wcheck;
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};
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int ping_get_port(struct sock *sk, unsigned short ident);
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void ping_hash(struct sock *sk);
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void ping_unhash(struct sock *sk);
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int ping_init_sock(struct sock *sk);
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void ping_close(struct sock *sk, long timeout);
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int ping_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len);
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void ping_err(struct sk_buff *skb, int offset, u32 info);
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int ping_getfrag(void *from, char *to, int offset, int fraglen, int odd,
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struct sk_buff *);
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int ping_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
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size_t len, int noblock, int flags, int *addr_len);
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int ping_common_sendmsg(int family, struct msghdr *msg, size_t len,
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void *user_icmph, size_t icmph_len);
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int ping_v4_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
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size_t len);
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int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
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size_t len);
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int ping_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
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void ping_rcv(struct sk_buff *skb);
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#ifdef CONFIG_PROC_FS
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extern int __init ping_proc_init(void);
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extern void ping_proc_exit(void);
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#endif
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void __init ping_init(void);
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int __init pingv6_init(void);
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void pingv6_exit(void);
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#endif /* _PING_H */
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