rfbInitClient() does not parse IPv6 addresses correctly

[bk138]

[bk138]

	  char* colon = NULL;
	  size_t colon_count = 0;
	  char *str = argv[i];
	  while(str && *str) {
	      if(*str == ':')
		  ++colon_count;
	      ++str;
	  }

	  if(colon_count > 1) {
	      /* probably IPv6, need [] to parse port */
	      char *closingbracket = strrchr(argv[i],']');
	      if(closingbracket && *(closingbracket+1) == ':')
		  colon = closingbracket+1;
	  } else
	      colon = strrchr(argv[i],':');

[willbprog127]

Greetings!

Is there any progress on this bug? My open-source project uses libvncclient and I cannot gain access to IPv6 servers - I receive "Unable to assign address" from libvncclient when trying.

Sorry, due to certain circumstances, I'm unable to submit a patch.

Thanks! 👍

[bk138]

Hi @willbprog127 this will still take some time if I do it, I'm currently overwhelmed with job-related work.

[willbprog127]

Hi again in November 2025.

Is there any progress on this? My open-source project still uses libvncclient. IPv6 is becoming more widely used these days, so this is going to be a growing issue for my project's users. If you're unable, are there any alternative libraries you recommend?

Thank you 👍

[bk138]

@willbprog127 there you go! https://buymeacoffee.com/christianbeier if you want to :-)

[willbprog127]

@willbprog127 there you go! https://buymeacoffee.com/christianbeier if you want to :-)

I'd love to, but they don't take my only available form of payment. Will try later with something else. Thank you so much! 👍