Indeed the used signal to terminate the extcap is SIGTERM. Is your signal handler called? Did you run a debugger to see which signal is interrupting your code? Did you try your code on unix?
On Mon, Nov 23, 2020 at 10:31 AM Timmy Brolin <t...@hms.se> wrote: > I am writing a extcap plugin for Wireshark (Windows version). The > documentation on how Wireshark stops a extcap capture is a bit sketchy, but > it seems it simply terminates the extcap plugin. > > If I run the extcap binary standalone, and stops it with Ctrl+C, > everything works as expected. The written pcapng file contains all blocks. > But when Wireshark runs the extcap binary, the last block, the "interface > statistics block", never shows up in the Wireshark capture. > > Is this a bug in Wireshark? Does Wireshark ignore any additional blocks in > the pcapng fifo after it has sent the signal to kill the extcap binary? > > The essential parts of the extcap plugin looks like this: > > > > static volatile int keepRunning = 1; > > void intHandler(int dummy) { > > keepRunning = 0; > > } > > > > int main(int argc, char *argv[]) > > { > > ... Parse arguments ... > > > > fp = fopen (pcOutputFilename, "wb"); > > fwrite( &sSHB, sizeof(sSHB), 1, fp ); // write section header block to > pcapng file. > > fwrite( &sIDB, sizeof(sIDB), 1, fp ); // write interface description block > to pcapng file. > > > > signal(SIGINT, intHandler); > > signal(SIGTERM, intHandler); > > > > do{ > > ... Capture frames and write to fp ... > > } > > while( keepRunning ); > > > > fwrite( &sISB, sizeof(sISB), 1, fp ); // write interface statistics block > to pcapng file. > > > > fclose(fp); > > } > > > > > > > > Regards, > > Timmy Brolin > > > ___________________________________________________________________________ > Sent via: Wireshark-dev mailing list <wireshark-dev@wireshark.org> > Archives: https://www.wireshark.org/lists/wireshark-dev > Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev > mailto:wireshark-dev-requ...@wireshark.org > ?subject=unsubscribe -- Naima is online.
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