/*
* Try to generate a fresh tuple of n values
* - tau[i] = type for a[i]
* - return false if this fails
*/
static bool gen_fresh_tuple(fresh_val_maker_t *maker, uint32_t n, type_t *tau, value_t *a) {
type_table_t *types;
value_table_t *vtbl;
tuple_counter_t *ctr;
uint32_t j;
value_t v;
types = maker->types;
vtbl = maker->vtbl;
// search for an infinite tau[j]
for (j=0; j<n; j++) {
if (! is_finite_type(types, tau[j])) {
break;
}
}
if (j < n) {
// tau[j] is infinite
fill_tuple(vtbl, n, tau, a, j);
a[j] = make_fresh_value(maker, tau[j]);
return true;
}
// all types are finite: try to get a fresh element
// for one of tau[j]
for (j=0; j<n; j++) {
v = make_fresh_value(maker, tau[j]);
if (v != null_value) break;
}
if (j < n) {
// we have a fresh v of type tau[j]
fill_tuple(vtbl, n, tau, a, j);
a[j] = v;
return true;
}
// all tau[i] are finite and saturated: use the counter
ctr = get_tuple_counter(maker, n, tau);
j = ctr->count;
while (j < ctr->card && vtbl_test_object_tuple(vtbl, n, tau, j)) {
j++;
}
if (j < ctr->card) {
vtbl_gen_object_tuple(vtbl, n, tau, j, a);
ctr->count = j+1;
return true;
}
// failed
ctr->count = j;
return false;
}
void cluster::_Run()
{
std::string thread_name = device_name + "_cluster";
prctl(PR_SET_NAME, thread_name.c_str());
int len = 2048;
u_char *buffer = new u_char[len];
struct pfring_pkthdr *hdr = (pfring_pkthdr *)buffer;
u_char* lpPkt = buffer + sizeof(struct pfring_pkthdr);
int waitable = 1; /* 0-->non-blocking, otherwise blocking*/
//u_int8_t level = 4; /* 2 of OSI-7*/
//u_int8_t addtimestamp = 1; /* 1 --> add timetamp */
//u_int8_t addhash = 0; /* 0 --> don't add hash */
pfring_enable_ring(ring);
//解码的结果集
_nic_stat_session_tuple tuple;
for(;;)
{
int ret = pfring_recv(ring, (u_char**)&lpPkt, PF_CAP_LEN, hdr, waitable);
if( ret > 0 )
{
decode((uint8_t *)lpPkt, hdr->caplen);
tuple.init();
fill_tuple(tuple, hdr->caplen);
cluster_stat_flow(&tuple);
}
}
}
void fill_tuple(typename tuple_wrapper<T, Elements...>::type & _t, const T& dat,const Elements&... args)
{
_t.current = dat;
fill_tuple(_t.forward, args...);
}
