run it under gdb and post a stack trace at least On 26 January 2015 at 10:15, Mario Reif <[email protected]> wrote: > Hello, > > I am using libcurl on Raspberry-Pi with a C++ Programm to connect to a > webservice over https. > > > In my testcase the libcurl establishes a valid https connection to my > webserver,. Then I simply stopped my Apache daemon (not graceful) to > simulate a network failure. The drop of the connection was recognized well > by libcurl, curl_easy_perform returned a valid error code and my program > continued to work as expected. After I restarted my Apache daemon my program > tried to reconnect, but doing this it crashed. Crashed means that the > program stopped without any error message. I mean the process was not > hanging, it has simply terminated and was not running any more. > > I also tried to use CURLOPT_FRESH_CONNECT after an error was recognized by > libcurl, but it didn't help. > > > My question: Would a newer version of libcurl solve this problem? Can I do > anything within my program to catch the failure and prevent my program to > crash? > > > I am using the following versions: > > > Package: libcurl4-openssl-dev > > Version: 7.26.0-1+wheezy12 > > Package: openssl > > Version: 1.0.1e-2+rvt+deb7u14 > > Linux raspi20501 3.12.35+ #730 PREEMPT Fri Dec 19 18:31:24 GMT 2014 armv6l > GNU/Linux > > > This is the verbose output from libcurl: > > > * Connection #0 seems to be dead! > > * Closing connection #0 > > * About to connect() to fmdevsignaldetection port 443 (#0) > > * Trying 192.168.1.104... > > * connected > > * Connected to fmdevsignaldetection (192.168.1.104) port 443 (#0) > > * successfully set certificate verify locations: > > * CAfile: none > > CApath: /etc/ssl/certs > > * SSL re-using session ID > > * SSL connection using DHE-RSA-AES256-SHA > > * Server certificate: > > * subject: C=at; ST=Steiermark; L=Graz; O=FactoryMiner e.U.; > CN=fmdevsignaldetection > > * start date: 2013-09-08 05:07:17 GMT > > * expire date: 2023-09-06 05:07:17 GMT > > * common name: fmdevsignaldetection (matched) > > * issuer: C=at; ST=Steiermark; L=Graz; O=FactoryMiner e.U.; > CN=fmdevsignaldetection > > * SSL certificate verify result: self signed certificate (18), continuing > anyway. > >> POST /framework/scripts/app_portal.php HTTP/1.1 > > User-Agent: signaldetection.service > > Host: fmdevsignaldetection > > Accept: */* > > Cookie: PHPSESSID=[deleted] > > Content-Length: 3241 > > Expect: 100-continue > > Content-Type: multipart/form-data; > boundary=----------------------------d08b8f8f2e20 > > * Empty reply from server > > * Connection #0 to host fmdevsignaldetection left intact > > * Server returned nothing (no headers, no data) > > > → The connection is lost, but the program is still running fine. Libcurl > returned a valid errorcode. > > > * Connection #0 seems to be dead! > > * Closing connection #0 > > → Here the program stops working. It crashed without any error messages... > > > > > Best regards > Mario Reif > > > > -- > Dipl.-Ing. Mario Reif, B.Sc. > > T: +43 (0)699 1129 1606 > M: [email protected] > W: www.factoryminer.com > > FACTORYMINER KG > Neubaugasse 34/5, 8020 Graz > > Rechtsform: Kommanditgesellschaft > Firmenbuchnummer: 414866 y > Firmenbuchgericht: Landesgericht für ZRS Graz > > > ------------------------------------------------------------------- > List admin: http://cool.haxx.se/list/listinfo/curl-library > Etiquette: http://curl.haxx.se/mail/etiquette.html
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