int main(int argc, char **argv){
char* interface = argv[1];
unsigned char *packet_header;
struct sockaddr sa;
int sock, ethhdr_len;
uint16_t len ;
unsigned char buffer[100] ;
struct frame header ;
FILE *fp;
struct ifreq ethreq;
long int counter = 0;
if(argc != 6){
printf("Wrong number of arguments\n") ;
printf("Usage:\n\t./node interface <input file> <own mac> <router mac> <output file>\n\n") ;
exit(0) ;
}
outFile = argv[5] ;
sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
if (sock == -1) {
printf("when opening socket in PAListener");
}
fp = fopen(argv[2], "rb") ;
if(fp == NULL)
printf("No such file exists\n") ;
header.type = 0x4e ;
BindRawSocketToInterface(argv[1], sock, ETH_P_ALL);
CreateEthernetHeader(&header, argv[3], argv[4], ETH_P_ALL);
ethhdr_len = sizeof(struct sniff_ethernet);
pthread_t interfaceSniffer;
int res ;
res = pthread_create(&interfaceSniffer, NULL, sniffer, (void *)sock);
if( res != 0){
fprintf(stderr, "TCP read thread creation failed\n") ;
exit(EXIT_FAILURE) ;
}
printf("hello\n") ;
int wait ;
scanf("Enter when ready %d", &wait) ;
while(!feof(fp)){
if (fscanf(fp, "%s" , header.buf) == EOF)
break ;
printf("Sent %s\n", header.buf) ;
if(write(sock,&header,ethhdr_len+FRAME_LEN) < 0){
perror("sendto");
}
usleep(100) ;
}
pthread_join(interfaceSniffer, NULL) ;
}
/* argv[1] is the device e.g. eth0
argv[2] is the number of packets to send
*/
int main(int argc, char **argv){
if (argc < 1){
perror("Arguments?\n");
return 1;
}
int raw;
unsigned char* packet;
struct ethhdr *ethernet_header;
struct iphdr *ip_header;
struct tcphdr *tcp_header;
unsigned char *data;
int num_of_pkts;
int pkt_len;
/* Create the raw socket */
raw = CreateRawSocket(ETH_P_ALL);
/* Bind raw socket to interface */
BindRawSocketToInterface(argv[1], raw, ETH_P_ALL);
//num_of_pkts = atoi(argv[2]);
ethernet_header = CreateEthernetHeader();
ip_header = CreateIPHeader();
tcp_header = CreateTcpHeader();
data = CreateData(DATA_SIZE);
/* Create PseudoHeader and compute TCP Checksum */
CreatePseudoHeaderAndComputeTcpChecksum(tcp_header, ip_header, data);
//pkt_len = sizeof(struct ethhdr) + sizeof(struct iphdr);
pkt_len = sizeof(struct ethhdr) + ntohs(ip_header->tot_len);
packet = (unsigned char *) malloc(pkt_len);
memcpy(packet, ethernet_header, sizeof(struct ethhdr));
memcpy((packet + sizeof(struct ethhdr)), ip_header, ip_header->ihl*4);
memcpy((packet + sizeof(struct ethhdr) + ip_header->ihl*4),tcp_header, tcp_header->doff*4);
memcpy((packet + sizeof(struct ethhdr) + ip_header->ihl*4 + tcp_header->doff*4), data, DATA_SIZE);
//while((num_of_pkts--)>0){
if(!SendRawPacket(raw, packet, pkt_len))
perror("Error sending packet");
else
printf("Packet sent successfully\n");
//}
/*free(ethernet_header);
free(ip_header);
free(tcp_header);
free(data);
free(packet);*/
close(raw);
return 0;
}
