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46 lines
1.6 KiB
46 lines
1.6 KiB
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* icmp.c - convenience functions for translating ICMP and ICMPv6 packets.
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*/
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#ifndef __ICMP_H__
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#define __ICMP_H__
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#include <stdint.h>
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// Guesses the number of hops a received packet has traversed based on its TTL.
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uint8_t icmp_guess_ttl(uint8_t ttl);
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// Determines whether an ICMP type is an error message.
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int is_icmp_error(uint8_t type);
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// Determines whether an ICMPv6 type is an error message.
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int is_icmp6_error(uint8_t type);
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// Maps ICMP types to ICMPv6 types. Partial implementation of RFC 6145, section 4.2.
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uint8_t icmp_to_icmp6_type(uint8_t type, uint8_t code);
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// Maps ICMP codes to ICMPv6 codes. Partial implementation of RFC 6145, section 4.2.
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uint8_t icmp_to_icmp6_code(uint8_t type, uint8_t code);
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// Maps ICMPv6 types to ICMP types. Partial implementation of RFC 6145, section 5.2.
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uint8_t icmp6_to_icmp_type(uint8_t type, uint8_t code);
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// Maps ICMPv6 codes to ICMP codes. Partial implementation of RFC 6145, section 5.2.
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uint8_t icmp6_to_icmp_code(uint8_t type, uint8_t code);
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#endif /* __ICMP_H__ */
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