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peteralieb |
// rawethernet.cpp
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#include "rawethernet.hpp"
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#include <sys/socket.h>
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#include <netpacket/packet.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <arpa/inet.h>
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#include <iostream>
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#include <cstring>
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using namespace std;
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RawEthernet::RawEthernet()
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{
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this->protocol = 0x0800;
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}
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RawEthernet::~RawEthernet()
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{
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}
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bool RawEthernet::connect(byte addr[])
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{
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struct sockaddr_ll socket_address;
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socket_address.sll_family = AF_PACKET;
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socket_address.sll_protocol = 0;//htons(ETH_P_IP); //0
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socket_address.sll_ifindex = if_nametoindex("eth0");
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socket_address.sll_hatype = 0;//ARPHRD_ETHER; //0
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socket_address.sll_pkttype = 0;//PACKET_OTHERHOST; //0
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socket_address.sll_halen = ETH_ALEN;
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/*MAC - begin*/
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socket_address.sll_addr[0] = addr[0];
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socket_address.sll_addr[1] = addr[1];
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socket_address.sll_addr[2] = addr[2];
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socket_address.sll_addr[3] = addr[3];
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socket_address.sll_addr[4] = addr[4];
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socket_address.sll_addr[5] = addr[5];
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/*MAC - end*/
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socket_address.sll_addr[6] = 0x00;/*not used*/
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socket_address.sll_addr[7] = 0x00;/*not used*/
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return this->connect(&socket_address);
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}
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bool RawEthernet::connect(struct sockaddr_ll *socket_address)
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{
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this->socketid = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
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if (this->socketid < 0)
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{
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cout << "Socket Error!" << endl;
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perror("socket");
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return false;
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}
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memcpy((void*)&(this->socket_address), socket_address, sizeof(struct sockaddr_ll));
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if (bind(this->socketid, (struct sockaddr*)socket_address, sizeof(struct sockaddr_ll))<0)
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{
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cout << "Binding Error!" << endl;
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perror("bind");
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return false;
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}
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return true;
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}
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void RawEthernet::disconnect()
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{
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}
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bool RawEthernet::sendData(byte data[], int len)
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{
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memcpy((void*)this->buffer, (void*)(this->socket_address.sll_addr), ETH_ALEN);
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memcpy((void*)(this->buffer+ETH_ALEN), (void*)(this->src_mac), ETH_ALEN);
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*((short*)&(this->buffer[ETH_ALEN+ETH_ALEN])) = htons(this->protocol);
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memcpy((void*)(this->buffer+ETH_HLEN), (void*)data, len);
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if (len < ETH_DATA_LEN)
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{
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memset((void*)(this->buffer+ETH_HLEN+len), 0, ETH_DATA_LEN-len);
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}
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int send_result = sendto(this->socketid, this->buffer, ETH_FRAME_LEN, 0,
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(struct sockaddr*)&(this->socket_address), sizeof(struct sockaddr_ll));
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if (send_result == -1)
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{
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cout << "Send Errer!" << endl;
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perror("sendto");
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return false;
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}
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return true;
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}
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bool RawEthernet::requestData(int len, byte *data)
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{
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int length = recvfrom(this->socketid, this->buffer, ETH_FRAME_LEN, 0, NULL, NULL);
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if (length == -1)
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{
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cout << "Receive Error!" << endl;
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perror("recvfrom");
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return false;
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}
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if (ntohs(*((short*)(&this->buffer[12]))) != this->protocol) return false;
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memcpy((void*)data, (void*)(this->buffer+14), len);
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return true;
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}
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const byte RawEthernet::src_mac[] = {0x0, 0x1b, 0x21, 0x82, 0xaf, 0xad};// len=8
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