EXPORT void oneSubkey(
double * traces, /* double * */
uint8_t * datain, /* uint8_t * */
uint8_t * dataout, /* uint8_t * */
size_t tracedim_n, /* Size of traces array, number of traces in array */
size_t tracedim_p, /* Total size of traces array, points in each trace */
size_t traceoffset, /* Starting trace to use in analysis */
size_t ntraces, /* Number of traces to use in analysis */
size_t pointoffset, /* Starting point to use in analysis */
size_t npoints, /* Number of points to use in analysis */
analysis_state_t * state,
void * model, /* Model */
void * modeldata, /* Model Data */
double * diffoutput)
{
double htmp;
double sumden1, sumden2, sumnum;
const int nguess = 256;
//printf("ntraces = %d\nnpoints=%d\n", ntraces, npoints);
state->totalTraces += ntraces;
/* Things which don't require guesses */
for(size_t t = 0; t < ntraces; t++){
for(size_t p = 0; p < npoints; p++){
state->sumtq[p] += trace_point(t,p) * trace_point(t,p);
state->sumt[p] += trace_point(t,p);
}
}
/* Things which require guesses */
for(unsigned int guess = 0; guess < nguess; guess++){
for(size_t t = 0; t < ntraces; t++){
htmp = aes_model(guess, datain + 16*t, dataout + 16*t, modeldata);
state->hyp[t] = htmp;
state->sumh[guess] += htmp;
state->sumhq[guess] += htmp*htmp;
//printf("%f\n", htmp);
}
for(size_t t = 0; t < ntraces; t++){
for(size_t p = 0; p < npoints; p++){
state->sumht[tracedim_p*guess + p] += trace_point(t,p) * state->hyp[t];
}
}
sumden1 = (state->sumh[guess] * state->sumh[guess]) - ((double)state->totalTraces) * state->sumhq[guess];
//printf("%f %f\n", state->sumh[1], state->sumhq[1]);
for(size_t p = 0; p < npoints; p++){
sumden2 = (state->sumt[p] * state->sumt[p]) - (((double)state->totalTraces) * state->sumtq[p]);
sumnum = ((double)state->totalTraces) * state->sumht[tracedim_p*guess + p] - state->sumh[guess]*state->sumt[p];
diffoutput[tracedim_p*guess + p] = sumnum / sqrt(sumden1 * sumden2);
//printf("%e %e %e\n", sumden1, sumden2, sumnum);
}
}
}
/*rtsp状态机，服务器端*/
void RTSP_state_machine(RTSP_buffer * pRtspBuf, int method)
{
#ifdef RTSP_DEBUG
trace_point();
#endif
/*除了播放过程中发送的最后一个数据流，
*所有的状态迁移都在这里被处理
* 状态迁移位于stream_event中
*/
char *s;
RTSP_session *pRtspSess;
long int session_id;
char trash[255];
char szDebug[255];
/*找到会话位置*/
if ((s = strstr(pRtspBuf->in_buffer, HDR_SESSION)) != NULL)
{
if (sscanf(s, "%254s %ld", trash, &session_id) != 2)
{
fprintf(stderr,"Invalid Session number %s,%i\n", __FILE__, __LINE__);
send_reply(454, 0, pRtspBuf); /* 没有此会话*/
return;
}
}
/*打开会话列表*/
pRtspSess = pRtspBuf->session_list;
if (pRtspSess == NULL)
{
return;
}
#ifdef RTSP_DEBUG
sprintf(szDebug,"state_machine:current state is ");
strcat(szDebug,((pRtspSess->cur_state==0)?"init state":((pRtspSess->cur_state==1)?"ready state":"play state")));
printf("%s\n", szDebug);
#endif
/*根据状态迁移规则，从当前状态开始迁移*/
switch (pRtspSess->cur_state)
{
case INIT_STATE: /*初始态*/
{
#ifdef RTSP_DEBUG
fprintf(stderr,"current method code is: %d \n",method);
#endif
switch (method)
{
case RTSP_ID_DESCRIBE: //状态不变
RTSP_describe(pRtspBuf);
//printf("3\r\n");
break;
case RTSP_ID_SETUP: //状态变为就绪态
//printf("4\r\n");
if (RTSP_setup(pRtspBuf) == ERR_NOERROR)
{
//printf("5\r\n");
pRtspSess->cur_state = READY_STATE;
fprintf(stderr,"TRANSFER TO READY STATE!\n");
}
break;
case RTSP_ID_TEARDOWN: //状态不变
RTSP_teardown(pRtspBuf);
break;
case RTSP_ID_OPTIONS:
if (RTSP_options(pRtspBuf) == ERR_NOERROR)
{
pRtspSess->cur_state = INIT_STATE; //状态不变
}
break;
case RTSP_ID_PLAY: //method not valid this state.
case RTSP_ID_PAUSE:
send_reply(455, 0, pRtspBuf);
break;
default:
send_reply(501, 0, pRtspBuf);
break;
}
break;
}
case READY_STATE:
{
#ifdef RTSP_DEBUG
fprintf(stderr,"current method code is:%d\n",method);
#endif
switch (method)
{
case RTSP_ID_PLAY: //状态迁移为播放态
if (RTSP_play(pRtspBuf) == ERR_NOERROR)
{
fprintf(stderr,"\tStart Playing!\n");
pRtspSess->cur_state = PLAY_STATE;
}
break;
case RTSP_ID_SETUP:
if (RTSP_setup(pRtspBuf) == ERR_NOERROR) //状态不变
{
pRtspSess->cur_state = READY_STATE;
}
break;
case RTSP_ID_TEARDOWN:
RTSP_teardown(pRtspBuf); //状态变为初始态 ?
break;
case RTSP_ID_OPTIONS:
if (RTSP_options(pRtspBuf) == ERR_NOERROR)
{
pRtspSess->cur_state = INIT_STATE; //状态不变
}
break;
case RTSP_ID_PAUSE: // method not valid this state.
send_reply(455, 0, pRtspBuf);
break;
case RTSP_ID_DESCRIBE:
RTSP_describe(pRtspBuf);
break;
default:
send_reply(501, 0, pRtspBuf);
break;
}
break;
}
case PLAY_STATE:
{
switch (method)
{
case RTSP_ID_PLAY:
// Feature not supported
fprintf(stderr,"UNSUPPORTED: Play while playing.\n");
send_reply(551, 0, pRtspBuf); // Option not supported
break;
/* //不支持暂停命令
case RTSP_ID_PAUSE: //状态变为就绪态
if (RTSP_pause(pRtspBuf) == ERR_NOERROR)
{
pRtspSess->cur_state = READY_STATE;
}
break;
*/
case RTSP_ID_TEARDOWN:
RTSP_teardown(pRtspBuf); //状态迁移为初始态
break;
case RTSP_ID_OPTIONS:
break;
case RTSP_ID_DESCRIBE:
RTSP_describe(pRtspBuf);
break;
case RTSP_ID_SETUP:
break;
}
break;
}/* PLAY state */
default:
{
/* invalid/unexpected current state. */
fprintf(stderr,"%s State error: unknown state=%d, method code=%d\n", __FUNCTION__, pRtspSess->cur_state, method);
}
break;
}/* end of current state switch */
#ifdef RTSP_DEBUG
printf("leaving rtsp_state_machine!\n");
#endif
}
