raw_loop.zip_RAW_linux raw socket_raw socket

#include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <sys/socket.h> #include <linux/sockios.h> #include <netpacket/packet.h> #include <net/ethernet.h> #include <linux/if.h> #include <errno.h> #include <unistd.h> #include <netinet/in.h> int main(int argc, char **argv) { struct ifreq stIfr; int iSockFd = -1, i; struct sockaddr_ll stSll; int iRcvNum, iLen = sizeof(stSll); unsigned char ucDataBuf[1600], ucTmp; unsigned int k = 0; if (argc != 2) { printf("usage: ./loop ethername.\n"); return 1; } if ((iSockFd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL))) < 0) { printf("create socket error. errno=%d\n", errno); return 1; } strcpy(stIfr.ifr_name, argv[1]); ioctl(iSockFd, SIOCGIFINDEX, &stIfr); bzero(&stSll, sizeof(stSll)); stSll.sll_family = AF_PACKET; stSll.sll_halen = 6; stSll.sll_ifindex = stIfr.ifr_ifindex; if (bind(iSockFd, (struct sockaddr *)&stSll, sizeof(stSll)) == -1) { printf("bind error.errno. errno=%d\n", errno); } while(1) { iRcvNum = recvfrom(iSockFd, ucDataBuf, 1500, 0, (struct sockaddr*)&stSll, &iLen); printf("%.2x ", ucDataBuf[18]); printf("%.2x ", ucDataBuf[19]); } return 0; }