47 lines
997 B
C++
47 lines
997 B
C++
/*
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* eth_icmp.cpp
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*
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* Created on: 14 мар. 2023 г.
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* Author: sychev
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*/
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#include "free_rtos/ethernet_ip/eth_icmp.hpp"
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#include "free_rtos/ethernet_ip/eth_icmp_types.h"
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#include "free_rtos/ethernet_ip/eth_ip_checksum.h"
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#include "free_rtos/base/swap.h"
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int32_t free_rtos::EthIcmp::Process(uint8_t * p_data, uint32_t len)
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{
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TIcmpEchoHeader * hdr = (TIcmpEchoHeader*)p_data;
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uint32_t ul_icmp_len = len;
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if (hdr->type != ICMP_ECHO_REQUEST) {
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return 0;
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}
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hdr->type = ICMP_ECHO_REPLY;
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hdr->code = 0;
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hdr->cksum = 0;
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/* Checksum of the ICMP message */
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if (ul_icmp_len % 2)
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{
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*(((uint8_t *) hdr) + ul_icmp_len) = 0;
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++ul_icmp_len;
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}
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ul_icmp_len = ul_icmp_len / 2;
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uint16_t chsum = eth_ip_calcChecksum((uint16_t *)hdr, ul_icmp_len);
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hdr->cksum = BASE_SWAP16(chsum);
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++rx_cnt_;
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return len;
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}
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uint16_t free_rtos::EthIcmp::Sender(HandlerArgs& handlerArgs, size_t scatter_segment)
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{
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return 0;
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}
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