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    dnsmasq to support ProxyDHCP for UEFI ?

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    • Wayne Workman
      Wayne Workman last edited by

      I’m on dnsmasq’s mailing list, got this in my inbox today:


      Re: ProxyDHCP mode is broken for serving ipxe.efi to UEFI pxe
      clents (Michael Kuron)

      Message: 1
      Date: Sat, 14 May 2016 19:47:06 +0200
      From: Michael Kuron michael-lists@physcip.uni-stuttgart.de
      To: dnsmasq-discuss@lists.thekelleys.org.uk
      Subject: Re: [Dnsmasq-discuss] ProxyDHCP mode is broken for serving
      ipxe.efi to UEFI pxe clents
      Message-ID:
      C5794A5E-3A85-4D49-A7D6-1084B7263A52@physcip.uni-stuttgart.de
      Content-Type: text/plain; charset=us-ascii

      I have included a patch below that makes essentially two modifications to get PXE working with the UEFI firmware in VMware.

      • It only appends the layer number to the file name on BIOS x86.
      • It always redirects the client to port 4011. To do that, only the siaddr is set and neither a boot file nor a PXE menu are included in the Offer sent upon receiving the Discover. In reaction to the ACK it then sends an ACK which includes either the single boot file name and server, or the PXE menu.

      This patch works to the same degree as my patch did. VMware boots fine with a single boot service, and the menu also works if you specify multiple, however you have to blindly navigate the menu because it is not shown on screen.

      Michael

      --- a/src/rfc2131.c
      +++ b/src/rfc2131.c
      @@ -63,7 +63,7 @@ static void pxe_misc(struct dhcp_packet *mess, unsigned char *end, unsigned char
       static int prune_vendor_opts(struct dhcp_netid *netid);
       static struct dhcp_opt *pxe_opts(int pxe_arch, struct dhcp_netid *netid, struct in_addr local, time_t now);
       struct dhcp_boot *find_boot(struct dhcp_netid *netid);
      -static int pxe_uefi_workaround(int pxe_arch, struct dhcp_netid *netid, struct dhcp_packet *mess, struct in_addr local, time_t now);
      +static int pxe_uefi_workaround(int pxe_arch, struct dhcp_netid *netid, struct dhcp_packet *mess, struct in_addr local, time_t now, int pxe);
      
       size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
                        size_t sz, time_t now, int unicast_dest, int *is_inform, int pxe, struct in_addr fallback)
      @@ -824,7 +824,10 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
                else
                  mess->siaddr = context->local;
      
      -         snprintf((char *)mess->file, sizeof(mess->file), "%s.%d", service->basename, layer);
      +         if (pxearch == 0)
      +             snprintf((char *)mess->file, sizeof(mess->file), "%s.%d", service->basename, layer);
      +         else
      +             strncpy((char *)mess->file, service->basename, sizeof(mess->file));
                option_put(mess, end, OPTION_MESSAGE_TYPE, 1, DHCPACK);
                option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(context->local.s_addr));
                pxe_misc(mess, end, uuid);
      @@ -879,11 +882,10 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
      
                        clear_packet(mess, end);
      
      -                 /* Only do workaround for replies to 4011 */
      -                 if (!pxe)
      -                   mess->siaddr = tmp->local;
      -                 else
      -                   workaround = pxe_uefi_workaround(pxearch, tagif_netid, mess, tmp->local, now);
      +                 /* Redirect the client to port 4011 */
      +                 mess->siaddr = tmp->local;
      +                 /* Returns true if only one matching service is available. On port 4011, it also inserts the boot file and server name. */
      +                 workaround = pxe_uefi_workaround(pxearch, tagif_netid, mess, tmp->local, now, pxe);
      
                        if (!workaround && boot)
                          {
      @@ -903,7 +905,7 @@ size_t dhcp_reply(struct dhcp_context *context, char *iface_name, int int_index,
                        option_put(mess, end, OPTION_SERVER_IDENTIFIER, INADDRSZ, htonl(tmp->local.s_addr));
                        pxe_misc(mess, end, uuid);
                        prune_vendor_opts(tagif_netid);
      -                 if (!workaround)
      +                 if (pxe && !workaround)
                          do_encap_opts(pxe_opts(pxearch, tagif_netid, tmp->local, now), OPTION_VENDOR_CLASS_OPT, DHOPT_VENDOR_MATCH, mess, end, 0);
      
                        log_packet("PXE", NULL, emac, emac_len, iface_name, ignore ? "proxy-ignored" : "proxy", NULL, mess->xid);
      @@ -1989,7 +1991,7 @@ static int prune_vendor_opts(struct dhcp_netid *netid)
          and jamb the data direct into the DHCP file, siaddr and sname fields.
          Note that in this case, we have to assume that layer zero would be requested
          by the client PXE stack. */
      -static int pxe_uefi_workaround(int pxe_arch, struct dhcp_netid *netid, struct dhcp_packet *mess, struct in_addr local, time_t now)
      +static int pxe_uefi_workaround(int pxe_arch, struct dhcp_netid *netid, struct dhcp_packet *mess, struct in_addr local, time_t now, int pxe)
       {
         struct pxe_service *service, *found;
      
      @@ -2009,6 +2011,9 @@ static int pxe_uefi_workaround(int pxe_arch, struct dhcp_netid *netid, struct dh
         if (!found)
           return 0; /* No relevant menu items. */
      
      +  if (!pxe)
      +     return 1;
      +
         if (found->sname)
           {
             mess->siaddr = a_record_from_hosts(found->sname, now);
      @@ -2024,7 +2029,10 @@ static int pxe_uefi_workaround(int pxe_arch, struct dhcp_netid *netid, struct dh
             inet_ntop(AF_INET, &mess->siaddr, (char *)mess->sname, INET_ADDRSTRLEN);
           }
      
      -  snprintf((char *)mess->file, sizeof(mess->file), "%s.0", found->basename);
      +  if (pxe_arch == 0)
      +      snprintf((char *)mess->file, sizeof(mess->file), "%s.0", service->basename);
      +  else
      +      strncpy((char *)mess->file, found->basename, sizeof(mess->file));
      
         return 1;
       }
      @@ -2563,7 +2571,7 @@ static void do_options(struct dhcp_context *context,
         if (context && pxe_arch != -1)
           {
             pxe_misc(mess, end, uuid);
      -      if (!pxe_uefi_workaround(pxe_arch, tagif, mess, context->local, now))
      +      if (!pxe_uefi_workaround(pxe_arch, tagif, mess, context->local, now, 0))
              config_opts = pxe_opts(pxe_arch, tagif, context->local, now);
           }
      

      Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
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      https://fogtesting.fogproject.us/
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      • Wayne Workman
        Wayne Workman last edited by

        Message: 1
        Date: Wed, 18 May 2016 16:44:39 +0100
        From: Simon Kelley simon@thekelleys.org.uk
        To: dnsmasq-discuss Dnsmasq-discuss@lists.thekelleys.org.uk
        Subject: [Dnsmasq-discuss] Announce: dnsmasq-2.76
        Message-ID: 573C8DE7.3030603@thekelleys.org.uk
        Content-Type: text/plain; charset=utf-8

        I’ve just released dnsmasq 2.76.

        Download from http://thekelleys.org.uk/dnsmasq/dnsmasq-2.76.tar.gz

        It’s more than nine months since the last release, so get the new code
        quick, there’s lots to go at.

        Cheers,

        Simon.

        Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
        Daily Clean Installation Results:
        https://fogtesting.fogproject.us/
        FOG Reporting:
        https://fog-external-reporting-results.fogproject.us/

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        • Wayne Workman
          Wayne Workman last edited by Wayne Workman

          @Sebastian-Roth Binaries of the release candidate:
          https://dl.bintray.com/dreamcat4/linux/dnsmasq/

          Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
          Daily Clean Installation Results:
          https://fogtesting.fogproject.us/
          FOG Reporting:
          https://fog-external-reporting-results.fogproject.us/

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          • S
            Sebastian Roth Moderator last edited by

            So who is gonna build it from source and give it a try? 😄

            Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

            Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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            • Wayne Workman
              Wayne Workman last edited by

              My message:


              Hello,

              I’m inquiring about the status of dnsmasq being able to operate in ProxyDHCP mode and serve option 066 and 067 boot file and file name to UEFI type systems.

              In the last digest, Vol 132, Issue 17 it was talked about but in regards to VMware. I’m wondering if there has been any progress with regular physical UEFI type machines?

              Thanks,
              Wayne


              Reply:


              It looks like this is solved problem for the forthcoming 2.76 release,
              for physical as well as virtual hosts.

              Cheers,

              Simon.

              Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
              Daily Clean Installation Results:
              https://fogtesting.fogproject.us/
              FOG Reporting:
              https://fog-external-reporting-results.fogproject.us/

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              • S
                Sebastian Roth Moderator last edited by Sebastian Roth

                Interesting stuff! Looking forward to see if dnsmasq will be able to PXE boot any kind of UEFI machines in the near future. Co-existence configuration with BIOS will still be a huge mess I reckon. 🙂

                Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

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                • Wayne Workman
                  Wayne Workman last edited by

                  I’ve sent an email requesting clarification. I’ll post the response when it’s released.

                  Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
                  Daily Clean Installation Results:
                  https://fogtesting.fogproject.us/
                  FOG Reporting:
                  https://fog-external-reporting-results.fogproject.us/

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                  • Wayne Workman
                    Wayne Workman @Tom Elliott last edited by

                    @Tom-Elliott I guess, I’m honestly not all that savvy with… you know… all that stuff above. Perhaps the issue was specific to VMware? I should ask again about regular UEFI ProxyDHCP. I did maybe a year ago and Simon said he would work on it… The thread about it is somewhere around here. I’ll ask again.

                    Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
                    Daily Clean Installation Results:
                    https://fogtesting.fogproject.us/
                    FOG Reporting:
                    https://fog-external-reporting-results.fogproject.us/

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                    • Tom Elliott
                      Tom Elliott @Wayne Workman last edited by

                      @Wayne-Workman I suppose that would mean for anything really right?

                      Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                      Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                      Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

                      Wayne Workman 1 Reply Last reply Reply Quote 0
                      • Wayne Workman
                        Wayne Workman @Tom Elliott last edited by

                        @Tom-Elliott It means that Simon Kelly and the Dnsmasq community are actively working on supporting UEFI based ProxyDHCP for dnsmasq in VMware.

                        Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG!
                        Daily Clean Installation Results:
                        https://fogtesting.fogproject.us/
                        FOG Reporting:
                        https://fog-external-reporting-results.fogproject.us/

                        Tom Elliott 1 Reply Last reply Reply Quote 0
                        • Tom Elliott
                          Tom Elliott last edited by

                          What does this mean?

                          Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.

                          Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)

                          Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG

                          Wayne Workman 1 Reply Last reply Reply Quote 0
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