> Do you have a specific use case for when this causes problems? It could help
> to make a test case for it so that a restructure of the code can be tested
> against a good scenario.
Attached code reproduces the issue, at least part of it.
--
Paras
#include <curl/curl.h>
void multi_perform(CURLM *multi) {
int still_running;
int i;
curl_multi_perform(multi, &still_running);
do {
struct timeval timeout;
int rc;
fd_set fdread;
fd_set fdwrite;
fd_set fdexcep;
int maxfd = -1;
long curl_timeo = -1;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
curl_multi_timeout(multi, &curl_timeo);
if(curl_timeo >= 0) {
timeout.tv_sec = curl_timeo / 1000;
if(timeout.tv_sec > 1)
timeout.tv_sec = 1;
else
timeout.tv_usec = (curl_timeo % 1000) * 1000;
}
curl_multi_fdset(multi, &fdread, &fdwrite, &fdexcep, &maxfd);
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
switch(rc) {
case -1:
break;
case 0:
default:
curl_multi_perform(multi, &still_running);
break;
}
} while(still_running);
}
int main(int argc, char** argv) {
CURL *easy1 = curl_easy_init();
curl_easy_setopt(easy1, CURLOPT_USERPWD, "user1:pwd");
curl_easy_setopt(easy1, CURLOPT_HTTPAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
curl_easy_setopt(easy1, CURLOPT_URL, "https://www.ntlm.com/";);
curl_easy_setopt(easy1, CURLOPT_MAXREDIRS, 2L);
//curl_easy_setopt(easy1, CURLOPT_VERBOSE, 1L);
CURL *easy2 = curl_easy_duphandle(easy1);
curl_easy_setopt(easy1, CURLOPT_USERPWD, "user2:pwd");
CURLM *multi = curl_multi_init();
curl_multi_setopt(multi, CURLMOPT_MAXCONNECTS, 1L);
curl_multi_add_handle(multi, easy1);
multi_perform(multi);
int messages_left;
CURLMsg *msg = curl_multi_info_read(multi, &messages_left);
//Should be success
printf("%s\n", msg->data.result == CURLE_OK ? "Success" : "Failure");
curl_multi_add_handle(multi, easy2);
multi_perform(multi);
msg = curl_multi_info_read(multi, &messages_left);
//Failure indicates that the previous connection has interfered with the
current operation,
//specifically, an extra redirect was needed because cleaning up the previous
connection has reset state.authhost.picked
printf("%s\n", msg->data.result == CURLE_OK ? "Success" : "Failure");
curl_multi_cleanup(multi);
curl_easy_cleanup(easy1);
curl_easy_cleanup(easy2);
return 0;
}
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