int main(int argc, const char * argv[]) {
int i;
char *arg_interface = NULL;
char *token, *dup;
int num_input_interfaces = 0;
struct interface *input_interface;
if (argc <= 1) {
print_usage();
exit(1);
}
// Read command line arguments
if (strcmp("-i", argv[1]) == 0) {
arg_interface = strdup(argv[2]);
}
/*
* CPU Prioritization
*
*/
// Increase the priority of the process (max priority is -20, min is 19)
if (setpriority(PRIO_PROCESS, 0, -20) < 0) {
fprintf(stderr, "** It is recommend to run as a superuser! **\n");
}
/*
* Listening Interfaces - defined in command line arguments
*
*/
// Realloc doesn't work so we count commas to approx the number of interfaces
for (i=0; i<strlen(arg_interface); i++) {
if (arg_interface[i] == ',') num_input_interfaces++;
}
num_input_interfaces++;
// Allocate input interface array
input_interface = (struct interface *) malloc(num_input_interfaces * sizeof(struct interface));
// Parse input interfaces
num_input_interfaces = 0;
dup = strdup(arg_interface);
while ((token = strtok(dup, ",")) != NULL) {
strcpy(input_interface[num_input_interfaces].interface_name, token);
fill_interface_info(&input_interface[num_input_interfaces]);
// Interface name is valid
if (input_interface[num_input_interfaces].interface_index != -1) {
num_input_interfaces++;
}
dup = NULL;
}
free(arg_interface);
// Print listening interfaces information
#ifdef _VERBOSE
fprintf(stderr, "[LISTENING INTERFACES]\n");
fprintf(stderr, " Number of listening interfaces: %d\n", num_input_interfaces);
fprintf(stderr, " %-5s %-6s %-19s %-15s\n", "Dev", "DevId", "Interface MAC addr", "Inf IP addr");
for(i=0; i<num_input_interfaces; i++) {
fprintf(stderr, "%2d ", i+1);
fprintf_interface(stderr, &input_interface[i]);
}
fprintf(stderr, "\n");
#endif
/*
* Start packet sniffing threads
*
*/
pthread_t thread[num_input_interfaces];
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
struct sniffer_thread_parameter params[num_input_interfaces];
for (i=0; i<num_input_interfaces; i++) {
fprintf(stderr, "[Start sniffer #%d - %s]\n", i+1, input_interface[i].interface_name);
params[i].interfaces = &input_interface;
params[i].num_interfaces = num_input_interfaces;
params[i].sniff_interface = i;
if (pthread_create(&thread[i], &attr, sniffer_thread, (void *) ¶ms[i]) < 0) {
fprintf(stderr, "Error: Can not create a thread for the sniffer_thread in main()\n");
}
}
for (i=0; i<num_input_interfaces; i++) {
pthread_join(thread[i], NULL);
}
return 0;
}
int main(int argc, const char * argv[]) {
FILE *file;
long file_size = -1;
char *file_path, *file_name;
struct stat file_stat;
unsigned char required_acks = FSCP_DEFAULT_NUMBER_OF_ACKS;
uchar_t *packet;
uint16_t recvfrom_addr;
struct layer2 *l2;
struct layer3 *l3;
struct layer4_udp *l4;
int i;
char *dup, *token;
uint8_t port;
struct interface output_interface;
size_t bandwidth = ~0;
if (argc <= 1) {
print_usage();
exit(1);
}
// Increase the priority of the process (max priority is -20, min is 19)
if (setpriority(PRIO_PROCESS, 0, -15) < 0) {
fprintf(stderr, "** It is recommend to run as a superuser! **\n");
}
// Initializing packet and its header
packet = (uchar_t *) malloc(MTU);
memset(packet, 0, MTU);
l2 = (struct layer2 *) packet;
l3 = (struct layer3 *) (packet + sizeof(struct layer2));
l4 = (struct layer4_udp *) (packet + sizeof(struct layer2) + sizeof(struct layer3));
l3->type = TYPE_UDP;
if (strcmp("-r", argv[1]) == 0) {
//Begin receiving the file
if (argc >= 11) {
if (strcmp("-src", argv[2]) == 0) {
l2->original_source_addr = htons((uint16_t) atoi(argv[3]));
}
else {
print_usage();
exit(1);
}
if (strcmp("-from", argv[4]) == 0) {
recvfrom_addr = (uint16_t) atoi(argv[5]);
}
else {
print_usage();
exit(1);
}
if (strcmp("-path", argv[6]) == 0) {
i = 0;
dup = strdup(argv[7]);
while ((token = strtok(dup, ",")) != NULL) {
l3->source_routing[i] = atoi(token);
i++;
dup = NULL;
if (i > MAX_HOPS-1) break;
}
free(dup);
}
else {
print_usage();
exit(1);
}
if (strcmp("-port", argv[8]) == 0) {
port = (uint8_t) atoi(argv[9]);
l4->sport = port;
l4->dport = port;
l4->len = htons(FSCP_UDP_ID_BYTES);
}
else {
print_usage();
exit(1);
}
if (strcmp("-dev", argv[10]) == 0) {
strcpy(output_interface.interface_name, argv[11]);
fill_interface_info(&output_interface);
}
else {
print_usage();
exit(1);
}
if ((argc >= 13) && (strcmp("-f", argv[12]) == 0)) {
if (argc >= 14) {
file_name = (char *) malloc(sizeof(char) * (strlen(argv[13]) + 1));
strcpy(file_name, argv[13]);
}
else {
print_usage();
exit(1);
}
}
else {
file_name = strdup("");
}
init_receiver(packet, recvfrom_addr, port, &output_interface, file_name);
}
else {
print_usage();
exit(1);
}
}
else if (strcmp("-s", argv[1]) == 0) {
if (argc >= 14) {
if (strcmp("-src", argv[2]) == 0) {
l2->original_source_addr = htons((uint16_t) atoi(argv[3]));
}
else {
print_usage();
exit(1);
}
if (strcmp("-dest", argv[4]) == 0) {
recvfrom_addr = (uint16_t) atoi(argv[5]);
}
else {
print_usage();
exit(1);
}
if (strcmp("-path", argv[6]) == 0) {
i = 0;
dup = strdup(argv[7]);
while ((token = strtok(dup, ",")) != NULL) {
l3->source_routing[i] = atoi(token);
i++;
dup = NULL;
if (i > MAX_HOPS-1) break;
}
free(dup);
}
else {
print_usage();
exit(1);
}
if (strcmp("-port", argv[8]) == 0) {
port = (uint8_t) atoi(argv[9]);
l4->sport = port;
l4->dport = port;
}
else {
print_usage();
exit(1);
}
if (strcmp("-dev", argv[10]) == 0) {
strcpy(output_interface.interface_name, argv[11]);
fill_interface_info(&output_interface);
}
else {
print_usage();
exit(1);
}
if (strcmp("-f", argv[12]) == 0) {
file = fopen(argv[13], "r");
if(!file) {
fprintf(stderr, "Error: cannot read the file %s\n", argv[13]);
exit(1);
}
stat(argv[13], &file_stat);
file_size = file_stat.st_size;
file_path = strdup(argv[13]);
file_name = strdup(basename(file_path));
}
else {
print_usage();
exit(1);
}
if (argc >= 15) {
if ((strcmp("-ack", argv[14]) == 0) && (argc >= 16)) {
required_acks = atoi(argv[15]);
if (required_acks == 0) {
required_acks = FSCP_DEFAULT_NUMBER_OF_ACKS;
}
}
#ifdef _THROTTLING_ENABLED
else if ((strcmp("-bw", argv[14]) == 0) && (argc >= 16)) {
bandwidth = atoi(argv[15]);
bandwidth *= 125 * 1000;
}
#endif
else {
print_usage();
exit(1);
}
}
#ifdef _THROTTLING_ENABLED
if (argc >= 17) {
if ((strcmp("-bw", argv[16]) == 0) && (argc >= 18)) {
bandwidth = atoi(argv[17]);
bandwidth *= 125 * 1000;
}
else {
print_usage();
exit(1);
}
}
#endif
init_sender(packet, recvfrom_addr, port, port, &output_interface, file, file_size, file_name, required_acks, bandwidth);
}
else {
print_usage();
exit(1);
}
}
else {
print_usage();
exit(1);
}
return 0;
}
int main(int argc, const char * argv[]) {
char *keystoredir;
char *arg_interface = NULL;
char *token, *dup;
int i;
int num_input_interfaces = 0;
uint16_t src;
struct stat s;
struct interface *input_interface;
if (argc <= 5) {
print_usage();
exit(1);
}
if (!((strcmp("-s", argv[1]) == 0) || (strcmp("-c", argv[1]) == 0))) {
print_usage();
exit(1);
}
if (strcmp("-src", argv[2]) != 0) {
print_usage();
exit(1);
}
if (strcmp("-d", argv[4]) != 0) {
print_usage();
exit(1);
}
if (strcmp("-i", argv[6]) != 0) {
print_usage();
exit(1);
}
src = (uint16_t) atoi(argv[3]);
keystoredir = strdup(argv[5]);
// Remove / if the dirname ends with a slash
if (keystoredir[strlen(keystoredir)-1] == '/') {
keystoredir[strlen(keystoredir)-1] = '\0';
}
// Check if the keystore directory exists
if (stat(keystoredir, &s) == -1) {
fprintf(stderr, "Error: keystore %s does not exist\n", keystoredir);
exit(1);
}
else {
if(!S_ISDIR(s.st_mode)) {
fprintf(stderr, "Error: keystore %s is not a directory\n", keystoredir);
exit(1);
}
}
arg_interface = strdup(argv[7]);
/*
* Network Interfaces
*
*/
// Count commas to get the upper bound of the number of interfaces
for (i=0; i<strlen(arg_interface); i++) {
if (arg_interface[i] == ',') num_input_interfaces++;
}
num_input_interfaces++;
// Allocate input interface array
input_interface = (struct interface *) malloc(num_input_interfaces * sizeof(struct interface));
// Parse input interfaces
num_input_interfaces = 0;
dup = strdup(arg_interface);
while ((token = strtok(dup, ",")) != NULL) {
strcpy(input_interface[num_input_interfaces].interface_name, token);
fill_interface_info(&input_interface[num_input_interfaces]);
// Interface name is valid
if (input_interface[num_input_interfaces].interface_index != -1) {
num_input_interfaces++;
}
dup = NULL;
}
free(arg_interface);
free(token);
// Check if the number of interfaces is at least 1
if (num_input_interfaces <= 0) {
fprintf(stderr, "Error: no valid network interfaces\n");
exit(1);
}
// Print listening interfaces information
#ifdef _VERBOSE
fprintf(stderr, "[NETWORK INTERFACES]\n");
fprintf(stderr, " Number of network interfaces: %d\n", num_input_interfaces);
fprintf(stderr, " %-5s %-6s %-19s %-15s\n", "Dev", "DevId", "Interface MAC addr", "Inf IP addr");
for(i=0; i<num_input_interfaces; i++) {
fprintf(stderr, "%2d ", i+1);
fprintf_interface(stderr, &input_interface[i]);
}
fprintf(stderr, "\n");
#endif
if (strcmp("-s", argv[1]) == 0) {
server(src, keystoredir, num_input_interfaces, &input_interface);
}
else if (strcmp("-c", argv[1]) == 0) {
client(src, keystoredir, num_input_interfaces, &input_interface);
}
return 0;
}