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total_read = s->read_stats.bytes;
total_write = s->write_stats.bytes;
app_read = s->read_stats.app_bytes;
app_write = s->write_stats.app_bytes;
}
printf("[RESULTS] BYTE STATISITICS:\n");
printf("[RESULTS] Bytes read: %d\n", total_read);
printf("[RESULTS] Application bytes read: %d [Expected %d]\n", app_read, sizeCheck);
printf("[RESULTS] Block padding bytes read: %d\n", s->read_stats.pad_bytes);
printf("[RESULTS] Header bytes read: %d\n", s->read_stats.header_bytes);
printf("[RESULTS] Handshake bytes read: %d\n", s->read_stats.handshake_bytes);
printf("[RESULTS] MAC bytes read: %d\n", s->read_stats.mac_bytes);
printf("[RESULTS] Alert bytes read: %d\n", s->read_stats.alert_bytes);
printf("[RESULTS] Bytes write: %d\n", total_write);
printf("[RESULTS] Application bytes write: %d\n", app_write);
printf("[RESULTS] Block padding bytes write: %d\n", s->write_stats.pad_bytes);
printf("[RESULTS] Header bytes write: %d\n", s->write_stats.header_bytes);
printf("[RESULTS] Handshake bytes write: %d\n", s->write_stats.handshake_bytes);
printf("[RESULTS] MAC bytes write: %d\n", s->write_stats.mac_bytes);
printf("[RESULTS] Alert bytes write: %d\n", s->write_stats.alert_bytes);
// In one line (so it's easy for plotting script).
// num_slices num_mboxes file_size total app_total padding_total header_total handshake_total MAC_total alert_bytes
printf("[RESULTS] ByteStatsSummary %d %d %d %d %d %d %d %d %d %d\n",
experiment_info->num_slices,
experiment_info->num_proxies,
experiment_info->file_size,
total_read + total_write,
app_read + app_write,
s->read_stats.pad_bytes + s->write_stats.pad_bytes,
s->read_stats.header_bytes + s->write_stats.header_bytes,
s->read_stats.handshake_bytes + s->write_stats.handshake_bytes,
s->read_stats.mac_bytes + s->write_stats.mac_bytes,
s->read_stats.alert_bytes + s->write_stats.alert_bytes);
}
// Usage function
void usage(void){
printf("usage: wclient -s -r -w -i -f -o -a -c -b\n");
printf("-s: number of slices requested (min 1)\n");
printf("-r: number of proxies with read access (per slice)\n");
printf("-w: number of proxies with write access (per slice)\n");
printf("-i: integrity check\n");
printf("-f: file for http GET (either via <name> (require file to exhist both at server and client[for testing reasons]) or via <size>)\n");
printf("-o: {1=test handshake ; 2=200 OK ; 3=file transfer ; 4=browser-like behavior}\n");
printf("-a: action file for browser-like behavior\n");
printf("-c: protocol chosen (ssl ; spp; pln; fwd; spp-mod; ssl-mod; fwd-mod; pln-mod)\n");
printf("-b: report byte statistics\n");
exit(-1);
}
/* Compute a time difference - NOTE: Return 1 if the difference is negative, otherwise 0 [now defined in the library]
int timeval_subtract(struct timeval *result, struct timeval *t2, struct timeval *t1)
{
long int diff = (t2->tv_usec + 1000000 * t2->tv_sec) - (t1->tv_usec + 1000000 * t1->tv_sec);
result->tv_sec = diff / 1000000;
result->tv_usec = diff % 1000000;
return (diff<0);
}
*/
// Main function
int main(int argc, char **argv){
SSL_CTX *ctx; // SSL context
BIO *sbio;
int sock; // socket descriptor
extern char *optarg; // user input parameters
int c; // user iput from getopt
char *filename = "proxyList"; // filename for proxy
int r = 0, w = 0; // slice related parameters
char *file_requested = "index.html"; // file requeste for HTTP GET
SPP_SLICE **slice_set; // slice array
SPP_PROXY **proxies; // proxy array
int N_proxies = 0; // number of proxies in path
int action = 0; // specify client/server behavior (handshake, 200OK, serve file, browser-like)
char *file_action = NULL; // file action to use for browser-liek behavior
struct timeval tvBeginConnect;
struct timeval tvEndConnect;
struct timeval tvBegin, tvEnd;
struct timeval tvConnect, tvDuration; // time structures for handshake duration
experiment_info = (ExperimentInfo*)malloc(sizeof(ExperimentInfo));
experiment_info->app_bytes_read = 0;
experiment_info->app_bytes_written = 0;
#ifdef DEBUG
printf("\n\n******************** CLIENT STARTING ********************\n");
#endif
// Handle user input parameters
while((c = getopt(argc, argv, "s:r:w:i:f:c:o:a:b:")) != -1){
switch(c){
// Number of slices
case 's': if(! (slices_len = atoi(optarg) )){
err_exit("Bogus number of slices specified (no. of slices need to be > 1)");
}
experiment_info->num_slices = slices_len;
break;
// Number of proxies with read access (per slice)
case 'r': r = atoi(optarg);
break;
// Number of proxies with write access (per slice)
case 'w': w = atoi(optarg);
break;
// Integrity check requested
case 'i': require_server_auth = 0;
break;
// Protocol chosen
case 'c': if(! (proto = strdup(optarg) )){
err_exit("Out of memory");
}
if (strcmp(proto, "spp_mod") == 0){
proto = "spp";
disable_nagle = 1;
}
if (strcmp(proto, "ssl_mod") == 0){
proto = "ssl";
disable_nagle = 1;
}
if (strcmp(proto, "fwd_mod") == 0){
proto = "fwd";
disable_nagle = 1;
}
if (strcmp(proto, "pln_mod") == 0){
proto = "pln";
disable_nagle = 1;
}
if (strcmp(proto, "fwd") == 0){
proto = "ssl";
}
break;
// File requested for HTTP GET
case 'f': if(! (file_requested = strdup(optarg) )){
err_exit("Out of memory");
}
break;
// Client/Server behavior
case 'o': action = atoi(optarg);
if (action == 2)
{
action = 3;
file_requested = "1";
}
break;
// Action file
// NOTE: necessary only if -o 4, i.e., browser-like behavior
case 'a': if(! (file_action = strdup(optarg) )){
err_exit("Out of memory");
}
break;
// Print byte statistics
case 'b': stats = atoi(optarg);
break;
// default case
default: usage();
break;
}
}
// Read number of proxy from file
N_proxies = read_proxy_count(filename);
experiment_info->num_proxies = N_proxies - 1;
// Check that input parameters are correct
#ifdef DEBUG
printf("[DEBUG] Parameters count: %d\n", argc);
#endif
if (argc == 1){
usage();
}
if ((strcmp(proto, "spp") == 0) && slices_len < 1){
printf("No. of slices need to be > 0");
usage();
}
if (action < 1 || action > 4){
usage();
}
if ((strcmp(proto, "spp") != 0) && (strcmp(proto, "ssl") != 0) && (strcmp(proto, "pln") != 0)){
printf("Protocol type specified (%s) is not supported. Supported protocols are: spp, ssl, pln\n", proto);
usage();
}
if (N_proxies == 0){
printf ("At least one proxy needs to be defined, i.e., the final server\n");
usage();
}
if (r > N_proxies || w > N_proxies){
printf ("The values for r and w need to be <= than the number of proxies\n");
usage();
}
if(action == 4){
if (file_action == NULL){
printf ("Action file (-a path_to_file) is required with -o 4\n");
usage();
}else{
FILE *fp;
fp = fopen(file_action,"r");
int ch=0;
// Check for errors while opening file
if(fp == NULL){
printf("Error while opening file %s.\r\n", file_action);
exit(-1);
}
while( ! feof(fp)){
ch = fgetc(fp);
if(ch == '\n'){
lines++;
}
}
fclose(fp);
}
}
// Generate a clientID
time_t t;
srand((unsigned) time(&t));
clientID = rand() % MAX_CONC_CLIENT;
// Construct string for client/server behavior
char *temp_str;
if (action == 1){
temp_str = "handshake_only";
}
if (action == 2){
temp_str = "200_OK";
}
if (action == 3){
temp_str = "serve_file";
}
if (action == 4){
temp_str = "browser_like";
}
// Logging input parameters
#ifdef DEBUG
printf("[DEBUG] CLIENT-ID=%d host=%s port=%d slices=%d read=%d write=%d n_proxies=%d proto=%s action=%d(%s)\n", clientID, host, port, slices_len, r, w, N_proxies, proto, action, temp_str);
#endif
// Build SSL context
ctx = initialize_ctx(KEYFILE, PASSWORD, proto);
ssl = SSL_new(ctx);
// Allocate memory for proxies
proxies = malloc( N_proxies * sizeof (SPP_PROXY*));
// Read proxy list
read_proxy_list(filename, proxies);
// Print proxy list
#ifdef DEBUG
print_proxy_list(proxies, N_proxies);
#endif
// Start timer for SPP (do not count slice creation for SSL instead)
if (strcmp(proto, "spp") == 0){
gettimeofday(&tvBegin, NULL);
}
// Create slices_n slices with incremental purpose
slice_set = malloc( slices_len * sizeof (SPP_SLICE*));
#ifdef DEBUG
printf("[DEBUG] Generating %d slices\n", slices_len);
#endif
int i;
for (i = 0; i < slices_len; i++){
char *newPurpose;
char str[30];
sprintf (str, "slices_%d", (i + 2));
newPurpose = (char *)malloc(strlen(str)+1);
strcpy(newPurpose, str);
slice_set[i] = SPP_generate_slice(ssl, newPurpose);
#ifdef DEBUG
printf("\t[DEBUG] Generated slices %d with purpose %s\n", slice_set[i]->slice_id, slice_set[i]->purpose);
#endif
}
// Assign write access to proxies for all slices
// Find MAX between r and w
int MAX = r;
if (w > r)
MAX = w;
// Iterate among proxies
for (i = 0; i < MAX ; i++){
// assign read access if requested
if (i < r){
if (SPP_assign_proxy_read_slices(ssl, proxies[i], slice_set, slices_len) == 1 ) {
#ifdef DEBUG
printf ("[DEBUG] Proxy %s assigned read access to slice-set (READ_COUNT=%d)\n", proxies[i]->address, (i + 1));
#endif
}
}
// assign write access if requested
if (i < w){
if (SPP_assign_proxy_write_slices(ssl, proxies[i], slice_set, slices_len) == 1 ) {
#ifdef DEBUG
printf ("Proxy %s correctly assigned write access to slice-set (WRITE COUNT=%d)\n", proxies[i]->address, (i + 1));
#endif
}
}
}
// Start timer for "ssl" and "pln"
if (strcmp(proto, "ssl") == 0 || strcmp(proto, "pln") == 0){
gettimeofday(&tvBegin, NULL);
}
// TCP Connect
char* address = (char*)malloc(strlen(proxies[0]->address) + 1); // Large enough for string+\0
memcpy(address, proxies[0]->address, strlen(proxies[0]->address) + 1);
host = strtok(address, ":");
port = atoi(strtok(NULL, ":"));
#ifdef DEBUG
printf("[DEBUG] Opening socket to host: %s, port %d\n", host, port);
#endif
sock = tcp_connect(host, port);
plain_socket = sock;
// Connect TCP socket to SSL socket
// don't init ssl for unencrypted data...
if (strcmp(proto, "pln") != 0)
{
sbio = BIO_new_socket(sock, BIO_NOCLOSE);
SSL_set_bio(ssl, sbio, sbio);
}
// SSL Connect
gettimeofday(&tvBeginConnect, NULL);
if (strcmp(proto, "pln") != 0){
doConnect (proto, slices_len, N_proxies, slice_set, proxies);
}
// Measure duration of "ssl"/"spp" connect (it does not apply to "pln" of course)
gettimeofday(&tvEndConnect, NULL);
timeval_subtract(&tvConnect, &tvEndConnect, &tvBegin);
// Switch across possible client-server behavior
// // NOTE: here we can add more complex strategies
switch(action){
// Handshake only
case 1: break;
// Send simple request, wait for 200 OK
case 2: http_request(file_requested, proto, false, &tvEnd);
break;
// Send HTTP GET request and wait for file to be received
case 3: http_request(file_requested, proto, true, &tvEnd);
break;
// Send several GET request following a browser-like behavior
case 4: http_complex(proto, file_action, &tvEnd);
break;
// Unknown option
default: usage();
break;
}
// Compute duration of action
if (action > 1){
timeval_subtract(&tvDuration, &tvEnd, &tvBegin);
}
// Remove SSL context
destroy_ctx(ctx);
// Clode socket
close(sock);
//Free memory
#ifdef DEBUG
printf("[DEBUG] Freeing memory\n");
#endif
for (i = 0; i < N_proxies ; i++){
free(proxies[i]);
}
for (i = 0; i < slices_len; i++){
free(slice_set[i]);
}
free(proxies);
free(slice_set);
free(experiment_info);
// Report time statistics
if (action > 1){
printf("[RESULTS] No_Slices %d Action %s_%d Duration %ld.%06ld\n", slices_len, temp_str, sizeCheck, tvDuration.tv_sec, tvDuration.tv_usec);
}else{
printf("[RESULTS] No_Slices %d Action %s Handshake_Dur %ld.%06ld\n", slices_len, temp_str, tvConnect.tv_sec, tvConnect.tv_usec);
}
// All good
return 0;
}