WebNov 12, 2024 · 1 Answer. Sorted by: 1. Your ip_header calculation has a problem with operator precedence. The cast of data will happen before the addition, with the result that you'll be reading the header from the wrong memory location. The fix is simple, add some parentheses: iphdr *ip_header = (struct iphdr *) (data + ETH_HLEN); Share. WebThis repo contains samples that demonstrate the API used in Windows classic desktop applications. - Windows-classic-samples/iphdr.h at main · microsoft/Windows-classic-samples
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WebApr 6, 2024 · 一、关于 ARP 响应中遇到的一些问题. ARP 响应之前,判断一下目标 IP 是否与自己相关,如果不相关,就把报文给抛掉,不要一遇见 ARP 请求报文就回复,可能会造成安全隐患,同时对系统也是一大笔开销,开发的时候可能会忽略这种小问题;. ARP 响应的时 … Webstruct ip 和struct iphdr. struct ip and struct iphdr are two different definitions of the same underlying structure, brought in from different places. struct ip is defined in , … the principle of excluded middle
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Web结构体 (struct)是由一系列具有相同类型或不同类型的数据构成的数据集合,也叫结构。. 结构体和其他类型基础数据类型一样,例如int类型, char类型 只不过结构体可以做成你想要的数据类型。. 以方便日后的使用。. 在实际项目中,结构体是大量存在的。. 研发 ... WebApr 14, 2024 · 이 코드에서는 calculate_ip_checksum () 함수가 IP 헤더의 체크섬 필드를 계산합니다. 이 함수는 IP 헤더 구조체를 입력으로 받아서, 구조체의 체크섬 필드를 0으로 초기화한 뒤에 IP 헤더의 각 2바이트를 16비트 체크섬 값에 더합니다. 그리고 체크섬 계산 결과에 carry를 ... WebApr 7, 2024 · 先看看ip头结构: struct iphdr { #if defined(__LITTLE_ENDIAN_BITFIELD) // 小端 __u8 ihl:4, // 首部长度(4位):首部长度指的是IP层头部占32 bit字的数目(也就是IP层头部 … the principle of effective stress