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</o:shapelayout></xml><![endif]--></head><body lang=DE link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Hi all,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>this is concerning the ubox package. If there is a more specific mailing list/issue tracker for this, please tell me so.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>We have found that the during validation of an NTP server in [1], the validation as “host” fails if the “host” is a link-local IPv6 address.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>If you track the issue through the various wrappers, it narrows down to<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>inet_pton(AF_INET6, s->value, &a);<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>in [2].<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Eventually, the problem is inet_pton not understanding the scope ID present in a link-local IPv6 address.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>From googling how to address this, a possible solution would be a switch to getaddrinfo [3].<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Another (less desirable) solution would be to just split at the % and then only validate the left part; however, I cannot judge whether this is easy to do in C.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Since I’m not very confident about my C capabilities and I did not find a way to build the ubox package separately (for testing), I hope someone is interested in having a look into this.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Adrian<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>[1] <a href="https://github.com/openwrt/openwrt/blob/master/package/utils/busybox/files/sysntpd#L31">https://github.com/openwrt/openwrt/blob/master/package/utils/busybox/files/sysntpd#L31</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[2] <a href="https://git.openwrt.org/?p=project/ubox.git;a=blob;f=validate/validate.c;h=e72b8117ecd8b680778b0f5c7637ed6546a7736b;hb=876c7f5bfb9b13d48e6d7960dd114082a0a95a6d#l398">https://git.openwrt.org/?p=project/ubox.git;a=blob;f=validate/validate.c;h=e72b8117ecd8b680778b0f5c7637ed6546a7736b;hb=876c7f5bfb9b13d48e6d7960dd114082a0a95a6d#l398</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>[3] <a href="http://man7.org/linux/man-pages/man3/getaddrinfo.3.html">http://man7.org/linux/man-pages/man3/getaddrinfo.3.html</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>