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#include <pthread.h>
#include <time.h>
#include "loop.h"
#include "conf.h"
#include "main.h"
#include "sblist.h"
#include "sock.h"
struct loop_record {
union sockaddr_union addr;
time_t tstamp;
};
static sblist *loop_records;
static pthread_mutex_t loop_records_lock = PTHREAD_MUTEX_INITIALIZER;
void loop_records_init(void) {
loop_records = sblist_new(sizeof (struct loop_record), 32);
}
void loop_records_destroy(void) {
sblist_free(loop_records);
loop_records = 0;
}
#if 0
static void su_to_str(union sockaddr_union *addr, char *buf) {
int af = addr->v4.sin_family;
unsigned port = ntohs(af == AF_INET ? addr->v4.sin_port : addr->v6.sin6_port);
char portb[32];
sprintf(portb, ":%u", port);
getpeer_information (addr, buf, 256);
strcat(buf, portb);
}
#endif
void loop_records_add(union sockaddr_union *addr) {
time_t now =time(0);
struct loop_record rec;
pthread_mutex_lock(&loop_records_lock);
rec.tstamp = now;
rec.addr = *addr;
sblist_add(loop_records, &rec);
pthread_mutex_unlock(&loop_records_lock);
}
#define TIMEOUT_SECS 15
int connection_loops (union sockaddr_union *addr) {
int ret = 0, af, our_af = addr->v4.sin_family;
void *ipdata, *our_ipdata = our_af == AF_INET ? (void*)&addr->v4.sin_addr.s_addr : (void*)&addr->v6.sin6_addr.s6_addr;
size_t i, cmp_len = our_af == AF_INET ? sizeof(addr->v4.sin_addr.s_addr) : sizeof(addr->v6.sin6_addr.s6_addr);
unsigned port, our_port = ntohs(our_af == AF_INET ? addr->v4.sin_port : addr->v6.sin6_port);
time_t now = time(0);
pthread_mutex_lock(&loop_records_lock);
for (i = 0; i < sblist_getsize(loop_records); ) {
struct loop_record *rec = sblist_get(loop_records, i);
if (rec->tstamp + TIMEOUT_SECS < now) {
sblist_delete(loop_records, i);
continue;
}
if (!ret) {
af = rec->addr.v4.sin_family;
if (af != our_af) goto next;
port = ntohs(af == AF_INET ? rec->addr.v4.sin_port : rec->addr.v6.sin6_port);
if (port != our_port) goto next;
ipdata = af == AF_INET ? (void*)&rec->addr.v4.sin_addr.s_addr : (void*)&rec->addr.v6.sin6_addr.s6_addr;
if (!memcmp(ipdata, our_ipdata, cmp_len)) {
ret = 1;
}
}
next:
i++;
}
pthread_mutex_unlock(&loop_records_lock);
return ret;
}
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