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[/] [minsoc/] [branches/] [rc-1.0/] [utils/] [contributions/] [eth_transf_linux/] [eth1_mac_recv.c] - Rev 112
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#include <stdio.h> #include <string.h> //packet socket #include <sys/socket.h> #include <netpacket/packet.h> #include <net/ethernet.h> //protocol #include <linux/if_ether.h> //netdevice stuff #include <sys/ioctl.h> #include <net/if.h> //file open stuff #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> //arp stuff //#include <linux/if_arp.h> #define MAC_ADDR_LEN 6 typedef unsigned char MacAddress[MAC_ADDR_LEN]; int main() { int socket_id, new_sock, iRet = -1; int addrlen, bytesread, nfound =0; int i = 0; MacAddress localMac = {0x00, 0x00, 0xC0, 0x41, 0x36, 0xD3}; // MacAddress localMac = {0xD3, 0x36, 0x41, 0xC0, 0x00, 0x00}; char buf[256]; struct sockaddr_ll my_addr; struct ifreq ethreq; int if_index; //create packet socket from type sock_dgram where headers are automatically thrown out if ( ( socket_id = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_ALL) ) ) < 0 ) { perror("socket"); exit(1); } else { printf("Socket has been created: socket_number %d\n", socket_id); } //GET ethreq for if "eth1" strncpy(ethreq.ifr_name,"eth1",IFNAMSIZ); ioctl(socket_id, SIOCGIFFLAGS, ðreq); //SET promisc mode for if ethreq // ethreq.ifr_flags |= IFF_PROMISC; // ioctl(socket_id, SIOCSIFFLAGS, ðreq); //request index ioctl(socket_id, SIOCGIFINDEX, ðreq); if_index = ethreq.ifr_ifindex; printf("This is the index of the interface: %d\n", if_index ); memset(&my_addr, '0', sizeof(my_addr) ); my_addr.sll_family = AF_PACKET; my_addr.sll_protocol = htons(ETH_P_ALL); //defaults to socket protocol my_addr.sll_ifindex = if_index; // my_addr.sll_hatype = htons(ARPHRD_ETHER); // my_addr.sll_pkttype = PACKET_OTHERHOST; my_addr.sll_halen = 6; memcpy( &(my_addr.sll_addr), localMac, MAC_ADDR_LEN ); //request hw_addres ioctl(socket_id, SIOCGIFHWADDR, ðreq); printf("This is the address of my card: %d\n", my_addr.sll_addr[5] ); //bind to interface goten from ioctl SIOCGIFHWADDR directive (otherwise all packets are recved) if ( bind( socket_id, (struct sockaddr *) &my_addr, sizeof(my_addr) ) ) { perror("bind"); exit(1); } struct sockaddr_ll from; int fromlen; fromlen = sizeof(from); for (;;) { iRet = recvfrom(socket_id, buf, 256, 0, &from, &fromlen); if ( iRet == -1 ) { perror("recvfrom"); exit(1); } else { printf("Received %d bytes of data.\n", iRet); printf("This is the received data:\n"); for ( i = 0; i < iRet; i++) printf("Byte %d: %X\n", i, (int)buf[i]); printf("End of transmission!\n"); } } return 0; }
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