libpcap绕过了Linux内核收包流程中协议栈部分的处理,使得用户空间API可以直接调用套接字PF_PACKET从链路层驱动程序中获得数据报文的拷贝,将其从内核缓冲区拷贝至用户空间缓冲区(第4次拷贝) 回到顶部 3.2 libpcap-mmap libpcap-mmap是对旧的libpcap实现的改进,新版本的libpcap基本都采用packet_mmap机制(见3.4 PACKET_...
首先查看一下源代码 shell#>vim /usr/include/bits/socket.h line 62 /* Protocol families. */ line 83 #define PF_PACKET 17 /* Packet family. */ line 94 /* Address families. */ line115 #define AF_PACKET PF_PACKET 看来数值上是相等的,都是 0x0011。不同之处是,一个代表协议族,一个代表...
static int packet_create(struct net *net, struct socket *sock, int protocol, int kern) { struct sock *sk; struct packet_sock *po; __be16 proto = (__force __be16)protocol; /* weird, but documented */ ... sk = sk_alloc(net, PF_PACKET, GFP_KERNEL, &packet_proto); ... sock...
packet_set_ring->tpacket_rcv: 漏洞代码: staticinttpacket_rcv(structsk_buff*skb,structnet_device*dev,structpacket_type*pt,structnet_device*orig_dev){// ...if(sk->sk_type==SOCK_DGRAM){macoff=netoff=TPACKET_ALIGN(po->tp_hdrlen)+16+po->tp_reserve;}else{unsignedintmaclen=skb_network_...
1、前言 linux提供了原始套接字RAW_SOCKET,可以抓取数据链路层的报文。这样可以对报文进行深入分析。今天介绍一下AF_PACKET的用法,分为两种方式。第一种方法是通过套接字,打开指定的网卡,然后使用recvmsg读取,实际过程需要需要将报文从内核区拷贝到用户区。第二种方法
fd = socket(AF_PACKET, SOCK_RAW, PF_PACKET); IS_ERR(fd == -1, "socket"); strcpy((char *)&ifr.ifr_name, "lo"); err = ioctl(fd, SIOCGIFINDEX, &ifr); IS_ERR(err == -1, "ioctl SIOCGIFINDEX"); index = ifr.ifr_ifindex; ...
This patch set switches the "networking" functionality of Ski from using PF_INET to using AF_PACKET instead. Running a Ski instance with this patch set applied will no longer cause the host kernel ...
问AF_INET和PF_INET常量之间有什么区别？EN随着时间的推移，云计算技术对于组织来说变得越来越重要。在...
PF_INET 和AF_INET 的区别 在写网络程序的时候,建立TCP socket: 然后再绑定本地地址或连接远程地址时需要初始化sockaddr_in结构,其中指定address family时一般设置问AF_INET,即使用IP。 相关的头文件定义:AF= Address Family PF = Protocol Family Socket编程 ...
A simple program to compare traffic capture technologies: libpcap, pfring and afpacket - stachdude/packetcapture