/**
* 扫描器开始工作
* @type 扫描方式
* @arg1, @arg2 由方式解释
*/
int scanner_work(int type, int arg1, int arg2)
{
int i = 0;
long k;
switch(type)
{
case SCAN_OPEN_PORT_ONLY:
for(i = 0; i < sizeof(open_ports) / sizeof(int); i ++)
{
scan_one(open_ports[i]);
}
break;
case SCAN_LOW:
for(i = 0; i < 1024; i ++)
{
scan_one(i);
}
break;
case SCAN_HIGH:
for(i = 1025; i <= PORT_MAX; i ++)
scan_one(i);
break;
case SCAN_ALL:
for(i = 0; i <= PORT_MAX; i ++)
scan_one(i);
break;
case SCAN_PART:
for(i = 0; i < 2000; i ++)
scan_one(i);
break;
case SCAN_FIXED:
scan_one(arg1);
break;
case SCAN_RANGE:
for(i = arg1; i <= arg2; i ++)
scan_one(i);
break;
case SCAN_LOW_RAND_HIGH:
for(i = 0; i < 1024; i ++)
scan_one(i);
srandom(time(NULL));
for(i = 1025; i <= PORT_MAX; i += 100)
{
k = random();
k %= 100;
scan_one(i + k);
}
break;
default:
errno = EINVAL;
return -EINVAL;
}
/*收尾处理*/
over_handle();
return 0;
}
int read_proc(unsigned long int * const prcs_run, unsigned long int * const prcs_blked)
{
char StatBuf[2048], *ptr = &StatBuf[0];
unsigned long int running, blocked;
ssize_t len;
size_t skip;
FILE *stat;
*prcs_run = 0;
*prcs_blked = 0;
if ((stat = fopen("/proc/stat", "r")) == (FILE*)0) {
fprintf(stderr, "ERROR: could not open /proc/stat: %s\n", strerror(errno));
return 1;
}
len = sizeof(StatBuf);
while ((len > 0) && (fgets(ptr, len, stat))) {
if (ptr[0] != 'p')
continue;
skip = strlen(ptr);
len -= skip;
ptr += skip;
}
fclose(stat);
/* These fields are not present in /proc/stat for 2.4 kernels or GNU/kFreeBSD */
running = scan_one(StatBuf, "procs_running");
blocked = scan_one(StatBuf, "procs_blocked");
if (running == ~0UL || blocked == ~0UL)
return 1;
*prcs_run = running;
*prcs_blked = blocked;
return 0;
}
static void processMemInfo()
{
scan_one(MemInfoBuf, "MemTotal", &Total);
scan_one(MemInfoBuf, "MemFree", &MFree);
scan_one(MemInfoBuf, "Buffers", &Buffers);
scan_one(MemInfoBuf, "Cached", &Cached);
scan_one(MemInfoBuf, "SwapTotal", &STotal);
scan_one(MemInfoBuf, "SwapFree", &SFree);
Used = Total - MFree;
Appl = (Used - (Buffers + Cached));
if(STotal == 0) /* no swap activated */
SUsed = 0;
else
SUsed = STotal - SFree;
Dirty = 0;
}
