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1fd07f33c3
This patch builds off of commit 2b246b2569
and adds functionality to respond to ICMPV6 PROBE requests.
Add icmp_build_probe function to construct PROBE requests for both
ICMPV4 and ICMPV6.
Modify icmpv6_rcv to detect ICMPV6 PROBE messages and call the
icmpv6_echo_reply handler.
Modify icmpv6_echo_reply to build a PROBE response message based on the
queried interface.
This patch has been tested using a branch of the iputils git repo which can
be found here: https://github.com/Juniper-Clinic-2020/iputils/tree/probe-request
Signed-off-by: Andreas Roeseler <andreas.a.roeseler@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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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 ICMP module.
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*
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* Version: @(#)icmp.h 1.0.4 05/13/93
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*
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* Authors: Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*/
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#ifndef _ICMP_H
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#define _ICMP_H
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#include <linux/icmp.h>
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#include <net/inet_sock.h>
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#include <net/snmp.h>
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#include <net/ip.h>
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struct icmp_err {
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int errno;
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unsigned int fatal:1;
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};
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extern const struct icmp_err icmp_err_convert[];
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#define ICMP_INC_STATS(net, field) SNMP_INC_STATS((net)->mib.icmp_statistics, field)
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#define __ICMP_INC_STATS(net, field) __SNMP_INC_STATS((net)->mib.icmp_statistics, field)
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#define ICMPMSGOUT_INC_STATS(net, field) SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field+256)
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#define ICMPMSGIN_INC_STATS(net, field) SNMP_INC_STATS_ATOMIC_LONG((net)->mib.icmpmsg_statistics, field)
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struct dst_entry;
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struct net_proto_family;
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struct sk_buff;
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struct net;
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void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info,
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const struct ip_options *opt);
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static inline void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
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{
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__icmp_send(skb_in, type, code, info, &IPCB(skb_in)->opt);
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}
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#if IS_ENABLED(CONFIG_NF_NAT)
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void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info);
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#else
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static inline void icmp_ndo_send(struct sk_buff *skb_in, int type, int code, __be32 info)
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{
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struct ip_options opts = { 0 };
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__icmp_send(skb_in, type, code, info, &opts);
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}
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#endif
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int icmp_rcv(struct sk_buff *skb);
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int icmp_err(struct sk_buff *skb, u32 info);
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int icmp_init(void);
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void icmp_out_count(struct net *net, unsigned char type);
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bool icmp_build_probe(struct sk_buff *skb, struct icmphdr *icmphdr);
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#endif /* _ICMP_H */
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