/* function assumes that header is a pointer to an allocated but un-initialized
setec_astronomy_header struct */
void create_header(struct setec_astronomy_header * header, int iv_len,
int salt_len, int hash_count, const char * password,
int hash_len)
{
int err;
header->salt_len = salt_len;
init_random_buffer(&(header->salt), header->salt_len);
header->hash_count = hash_count;
header->hash_len = hash_len;
header->hash = malloc(header->hash_len);
err = PKCS5_PBKDF2_HMAC_SHA1(password, strlen(password), header->salt,
header->salt_len, header->hash_count*2,
header->hash_len, header->hash);
header->iv_len = iv_len;
init_random_buffer(&(header->iv), header->iv_len);
}
int main(int argc, char *argv[]) {
int sockfd_snd, sockfd_rcv_sender, sockfd_rcv_monitor, sockfd_monitor=-1;
struct sockaddr_in my_addr; // my address information
struct sockaddr_in their_addr; // connector's address information
fd_set read_fds_copy, write_fds_copy;
socklen_t sin_size;
struct timeval start_tv, left_tv;
int yes=1;//, flag_send_monitor=0;
struct timeval packet_deadline;
struct in_addr addr;
int flag_measure=0;
char ch;
unsigned short standalone_port = SENDER_PORT;
// Do we use live data? Or previously recorded data?
FILE * logfile = NULL;
unsigned long quantum_no=0;
int logflags = LOG_NOTHING;
int select_count = 0;
gettimeofday(&packet_deadline, NULL);
init();
//set up debug flag
if (getenv("Debug")!=NULL)
flag_debug=1;
else
flag_debug=0;
flag_standalone = 0;
/*
* Process command-line arguments
*/
while ((ch = getopt(argc,argv,"df:l:b:rst")) != -1) {
switch (ch) {
case 'd':
flag_debug = 1; break;
case 'f':
if (logfile == NULL)
{
logfile = fopen(optarg, "a");
if (logfile == NULL)
{
perror("Log fopen()");
exit(1);
}
}
break;
case 'b':
if (strcmp(optarg, "average") == 0)
{
bandwidth_method = BANDWIDTH_AVERAGE;
} else if (strcmp(optarg, "max") == 0) {
bandwidth_method = BANDWIDTH_MAX;
} else if (strcmp(optarg, "vegas") == 0) {
bandwidth_method = BANDWIDTH_VEGAS;
} else if (strcmp(optarg, "buffer") == 0) {
bandwidth_method = BANDWIDTH_BUFFER;
} else {
fprintf(stderr, "Unknown bandwidth method\n");
usage();
exit(1);
}
break;
case 'l':
if (strcmp(optarg, "everything") == 0)
{
logflags = LOG_EVERYTHING;
}
else if (strcmp(optarg, "nothing") == 0)
{
logflags = LOG_NOTHING;
}
else if (strcmp(optarg, "control-send") == 0)
{
logflags = logflags | CONTROL_SEND;
}
else if (strcmp(optarg, "control-receive") == 0)
{
logflags = logflags | CONTROL_RECEIVE;
}
else if (strcmp(optarg, "tcptrace-send") == 0)
{
logflags = logflags | TCPTRACE_SEND;
}
else if (strcmp(optarg, "tcptrace-receive") == 0)
{
logflags = logflags | TCPTRACE_RECEIVE;
}
else if (strcmp(optarg, "sniff-send") == 0)
{
logflags = logflags | SNIFF_SEND;
}
else if (strcmp(optarg, "sniff-receive") == 0)
{
logflags = logflags | SNIFF_RECEIVE;
}
else if (strcmp(optarg, "peer-write") == 0)
{
logflags = logflags | PEER_WRITE;
}
else if (strcmp(optarg, "peer-read") == 0)
{
logflags = logflags | PEER_READ;
}
else if (strcmp(optarg, "main-loop") == 0)
{
logflags = logflags | MAIN_LOOP;
}
else if (strcmp(optarg, "lookup-db") == 0)
{
logflags = logflags | LOOKUP_DB;
}
else if (strcmp(optarg, "delay-detail") == 0)
{
logflags = logflags | DELAY_DETAIL;
}
else if (strcmp(optarg, "packet-buffer-detail") == 0)
{
logflags = logflags | PACKET_BUFFER_DETAIL;
}
else
{
fprintf(stderr, "Unknown logging option %s\n", optarg);
usage();
exit(1);
}
break;
case 's':
flag_standalone = 1; break;
case 'r':
flag_standalone = 1;
is_live = 0;
break;
case 't':
flag_testmode = 1; break;
default:
fprintf(stderr,"Unknown option %c\n",ch);
usage(); exit(1);
}
}
argc -= optind;
argv += optind;
if (logfile == NULL)
{
logfile = stderr;
}
logInit(logfile, logflags, 1);
if (flag_standalone) {
if (argc != 3) {
fprintf(stderr,"Wrong number of options for standalone: %i\n",argc);
usage();
exit(1);
} else {
flag_measure = 1;
// rcvdb[0].valid = 1;
standalone_port = atoi(argv[2]);
inet_aton(argv[1], &addr);
insert_fake(addr.s_addr, standalone_port);
// rcvdb[0].ip = addr.s_addr;
// rcvdb[0].sockfd= -1; //show error if used
// rcvdb[0].last_usetime = time(NULL);
}
printf("Running in standalone mode\n");
} else {
if (argc != 1) {
fprintf(stderr,"Wrong number of options: %i\n",argc);
usage();
exit(1);
}
}
if (flag_testmode) {
printf("Running in testmode\n");
test_state = TEST_NOTSTARTED;
}
if (strlen(argv[0]) > 127) {
fprintf(stderr,"Error: the <sniff-interface> name must be less than 127 characters \n");
exit(1);
}
// strcpy(sniff_interface, argv[0]);
//set up the sender connection listener
if ((sockfd_rcv_sender = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
if (setsockopt(sockfd_rcv_sender, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
perror("setsockopt");
exit(1);
}
my_addr.sin_family = AF_INET; // host byte order
my_addr.sin_port = htons(SENDER_PORT); // short, network byte order
my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
// memset(&(my_addr.sin_zero), '\0', 8); // zero the rest of the struct
if (flag_debug) printf("Listen on %s\n",inet_ntoa(my_addr.sin_addr));
if (bind(sockfd_rcv_sender, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1) {
perror("bind");
exit(1);
}
if (listen(sockfd_rcv_sender, PENDING_CONNECTIONS) == -1) {
perror("listen");
exit(1);
}
//set up the monitor connection listener
if ((sockfd_rcv_monitor = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("socket");
exit(1);
}
if (setsockopt(sockfd_rcv_monitor, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) {
perror("setsockopt");
exit(1);
}
my_addr.sin_family = AF_INET; // host byte order
my_addr.sin_port = htons(MONITOR_PORT); // short, network byte order
my_addr.sin_addr.s_addr = INADDR_ANY; // automatically fill with my IP
// memset(&(my_addr.sin_zero), '\0', 8); // zero the rest of the struct
if (flag_debug) printf("Listen on %s\n",inet_ntoa(my_addr.sin_addr));
if (bind(sockfd_rcv_monitor, (struct sockaddr *)&my_addr, sizeof(struct sockaddr)) == -1) {
perror("bind");
exit(1);
}
if (listen(sockfd_rcv_monitor, 1) == -1) {
perror("listen");
exit(1);
}
//initialization
packet_buffer_init();
init_random_buffer();
init_pcap(SNIFF_TIMEOUT, standalone_port, argv[0]);
FD_ZERO(&read_fds);
FD_ZERO(&read_fds_copy);
FD_ZERO(&write_fds);
FD_ZERO(&write_fds_copy);
FD_SET(pcapfd, &read_fds);
FD_SET(sockfd_rcv_sender, &read_fds);
FD_SET(sockfd_rcv_monitor, &read_fds);
maxfd = pcapfd; //socket order
sin_size = sizeof(struct sockaddr_in);
//main loop - the stubd runs forever
while (1) {
// flag_send_monitor=0; //reset flag for each quanta
gettimeofday(&start_tv, NULL); //reset start time for each quanta
// printf("Total: %d\n", total_size);
// printf("========== Quantum %lu ==========\n", quantum_no);
logWrite(MAIN_LOOP, NULL, "Quantum %lu", quantum_no);
if (is_live)
{
update_stats();
logWrite(MAIN_LOOP, NULL, "PCAP Received: %u Dropped: %u",
received_stat(), dropped_stat());
}
quantum_no++;
//while in a quanta
while(have_time(&start_tv, &left_tv)) {
read_fds_copy = read_fds;
write_fds_copy = write_fds;
select_count = select(maxfd+1, &read_fds_copy, &write_fds_copy, NULL,
&left_tv);
if (select_count == -1)
{
perror("select");
clean_exit(1);
}
// fprintf(stderr, "Select count: %d\n", select_count);
// Send out packets to our peers if the deadline has passed.
// logWrite(MAIN_LOOP, NULL, "Send normal packets to peers");
handle_packet_buffer(&packet_deadline, &write_fds_copy);
// send to destinations which are writeable and are behind.
// logWrite(MAIN_LOOP, NULL, "Send pending packets to peers");
#ifdef USE_PACKET_BUFFER
for_each_pending(try_pending, &write_fds_copy);
#endif
// receive from existing senders
// logWrite(MAIN_LOOP, NULL, "Receive packets from peers");
for_each_readable_sender(receive_sender, &read_fds_copy);
/*
//receive from existent senders
for (i=0; i<CONCURRENT_SENDERS; i++){
// Send pending data if it exists.
if (snddb[i].valid==1 && FD_ISSET(snddb[i].sockfd, &read_fds_copy)) {
receive_sender(i);
}
}
*/
//handle new senders
if (FD_ISSET(sockfd_rcv_sender, &read_fds_copy)) {
if ((sockfd_snd = accept(sockfd_rcv_sender, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
perror("accept");
continue;
} else {
logWrite(MAIN_LOOP, NULL, "Accept new peer (%s)",
inet_ntoa(their_addr.sin_addr));
replace_sender_by_stub_port(their_addr.sin_addr.s_addr,
ntohs(their_addr.sin_port), sockfd_snd,
&read_fds);
// insert_db(their_addr.sin_addr.s_addr, their_addr.sin_port,
// SENDER_PORT, sockfd_snd, 1); //insert snddb
// FD_SET(sockfd_snd, &read_fds); // add to master set
// if (sockfd_snd > maxfd) { // keep track of the maximum
// maxfd = sockfd_snd;
// }
if (flag_debug) printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
}
}
//handle the new monitor
if (FD_ISSET(sockfd_rcv_monitor, &read_fds_copy)) {
if ((sockfd_monitor = accept(sockfd_rcv_monitor, (struct sockaddr *)&their_addr, &sin_size)) == -1) {
perror("accept");
continue;
} else {
int nodelay = 1;
int nodelay_error = setsockopt(sockfd_monitor, IPPROTO_TCP,
TCP_NODELAY, &nodelay,
sizeof(nodelay));
if (nodelay_error == -1)
{
perror("setsockopt (TCP_NODELAY)");
clean_exit(1);
}
logWrite(MAIN_LOOP, NULL, "Accept new monitor (%s)",
inet_ntoa(their_addr.sin_addr));
FD_CLR(sockfd_rcv_monitor, &read_fds); //allow only one monitor connection
FD_SET(sockfd_monitor, &read_fds); //check the monitor connection for read
// FD_SET(sockfd_monitor, &write_fds); //check the monitor connection for write
if (sockfd_monitor > maxfd) { //keep track of the maximum
maxfd = sockfd_monitor;
}
if (flag_debug) printf("server: got connection from %s\n",inet_ntoa(their_addr.sin_addr));
}
}
//receive from the monitor
if (sockfd_monitor!=-1 && FD_ISSET(sockfd_monitor, &read_fds_copy)) {
logWrite(MAIN_LOOP, NULL, "Receive control message from monitor");
if (receive_monitor(sockfd_monitor, &packet_deadline) == 0) { //socket_monitor closed by peer
FD_CLR(sockfd_monitor, &read_fds); //stop checking the monitor socket
// FD_CLR(sockfd_monitor, &write_fds);
sockfd_monitor = -1;
FD_SET(sockfd_rcv_monitor, &read_fds); //start checking the receiver control socket
if (sockfd_rcv_monitor > maxfd) { // keep track of the maximum
maxfd = sockfd_rcv_monitor;
}
}
}
//sniff packets
if (FD_ISSET(pcapfd, &read_fds_copy)) {
logWrite(MAIN_LOOP, NULL, "Sniff packet stream");
sniff();
}
} //while in quanta
//send measurements to the monitor once in each quanta
if (sockfd_monitor!=-1)
// && FD_ISSET(sockfd_monitor, &write_fds_copy)) {
{
logWrite(MAIN_LOOP, NULL, "Send control message to monitor");
if (send_monitor(sockfd_monitor) == 0) { //socket_monitor closed by peer
logWrite(MAIN_LOOP, NULL, "Message to monitor failed");
FD_CLR(sockfd_monitor, &read_fds); //stop checking the monitor socket
// FD_CLR(sockfd_monitor, &write_fds);
sockfd_monitor = -1;
FD_SET(sockfd_rcv_monitor, &read_fds); //start checking the receiver control socket
if (sockfd_rcv_monitor > maxfd) { // keep track of the maximum
maxfd = sockfd_rcv_monitor;
}
} else {
logWrite(MAIN_LOOP, NULL, "Message to monitor succeeded");
// flag_send_monitor=1;
}
}
// In testmode, we only start printing in the quanta we first see a packet
if (flag_standalone) {
print_measurements();
}
// If running in testmode, and the test is over, exit!
if (flag_testmode && test_state == TEST_DONE) {
printf("Test done - total bytes transmitted: %llu\n",total_bytes);
break;
}
} //while forever
packet_buffer_cleanup();
return 0;
}
