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fix infinite loop AAAA requests

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This commit is contained in:
Pieter Wuille 2012-05-26 00:09:07 +02:00
parent 2b29f0a760
commit 8530bfa64d
1 changed files with 11 additions and 5 deletions
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16
main.cpp
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@ -132,7 +132,8 @@ extern "C" int GetIPList(void *thread, addr_t *addr, int max, int ipv4, int ipv6
class CDnsThread {
public:
dns_opt_t dns_opt;
dns_opt_t dns_opt; // must be first
const int id;
vector<addr_t> cache;
int nIPv4, nIPv6;
time_t cacheTime;
@ -179,7 +180,7 @@ public:
}
}
CDnsThread(CDnsSeedOpts* opts) {
CDnsThread(CDnsSeedOpts* opts, int idIn) : id(idIn) {
dns_opt.host = opts->host;
dns_opt.ns = opts->ns;
dns_opt.mbox = opts->mbox;
@ -206,9 +207,12 @@ public:
extern "C" int GetIPList(void *data, addr_t* addr, int max, int ipv4, int ipv6) {
CDnsThread *thread = (CDnsThread*)data;
thread->cacheHit();
unsigned int size = (ipv4 ? thread->nIPv4 : 0) + (ipv6 ? thread->nIPv6 : 0);
unsigned int size = thread->cache.size();
unsigned int maxmax = (ipv4 ? thread->nIPv4 : 0) + (ipv6 ? thread->nIPv6 : 0);
if (max > size)
max = size;
if (max > maxmax)
max = maxmax;
int i=0;
while (i<max) {
int j = i + (rand() % (size - i));
@ -216,7 +220,9 @@ extern "C" int GetIPList(void *data, addr_t* addr, int max, int ipv4, int ipv6)
bool ok = (ipv4 && thread->cache[j].v == 4) ||
(ipv6 && thread->cache[j].v == 6);
if (ok) break;
j = i + ((j - i + 1) % (size - i));
j++;
if (j==size)
j=i;
} while(1);
addr[i] = thread->cache[j];
thread->cache[j] = thread->cache[i];
@ -347,7 +353,7 @@ int main(int argc, char **argv) {
printf("Starting %i DNS threads for %s on %s (port %i)...", opts.nDnsThreads, opts.host, opts.ns, opts.nPort);
dnsThread.clear();
for (int i=0; i<opts.nDnsThreads; i++) {
dnsThread.push_back(new CDnsThread(&opts));
dnsThread.push_back(new CDnsThread(&opts, i));
pthread_create(&threadDns, NULL, ThreadDNS, dnsThread[i]);
printf(".");
Sleep(20);