178c49d9f9
The RFC 4884 spec is largely the same between IPv4 and IPv6. Factor out the IPv4 specific parts in preparation for IPv6 support: - icmp types supported - icmp header size, and thus offset to original datagram start - datagram length field offset in icmp(6)hdr. - datagram length field word size: 4B for IPv4, 8B for IPv6. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
44 lines
1 KiB
C
44 lines
1 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 protocol.
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*
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* Version: @(#)icmp.h 1.0.3 04/28/93
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*
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* Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*/
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#ifndef _LINUX_ICMP_H
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#define _LINUX_ICMP_H
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#include <linux/skbuff.h>
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#include <uapi/linux/icmp.h>
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#include <uapi/linux/errqueue.h>
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static inline struct icmphdr *icmp_hdr(const struct sk_buff *skb)
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{
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return (struct icmphdr *)skb_transport_header(skb);
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}
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static inline bool icmp_is_err(int type)
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{
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switch (type) {
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case ICMP_DEST_UNREACH:
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case ICMP_SOURCE_QUENCH:
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case ICMP_REDIRECT:
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case ICMP_TIME_EXCEEDED:
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case ICMP_PARAMETERPROB:
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return true;
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}
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return false;
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}
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void ip_icmp_error_rfc4884(const struct sk_buff *skb,
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struct sock_ee_data_rfc4884 *out,
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int thlen, int off);
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#endif /* _LINUX_ICMP_H */
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