[En-Nut-Discussion] Nut/OS 3.2 DHCP Patch

[Harald Kipp]

Tomohiro Haraikawa provided the following patch to Version 3.2
pro/dhcpc.c

      2) Incompatibility with some DHCP servers including broadband
         routers

           Some DHCP servers discard Nut/NET DHCP discover telegram
         because it doesn't satisfy upward compatibility with BOOTP
         packet. Most DHCP clients pad NULs to make the packet len-
         gth to 300 octets.

==================================================================
333a334
 >     u_short len;
340,341c341,346
<     return NutUdpSendTo(sock, daddr, dport, bp,
<                         (u_short) cp - (u_short) bp);
---
 >     /* DHCP discover telegram should be upward compatible with BOOTP */
 >     len = (u_short) cp - (u_short) bp;
 >     if (len < (char *)&bp->bp_options - (char *)bp + 64)
 >         len = (char *)&bp->bp_options - (char *)bp + 64;
 >
 >     return NutUdpSendTo(sock, daddr, dport, bp, len);
==================================================================

Many thanks,

Harald