On Sat, Aug 20, 2011 at 11:12:10PM +0500, Tahir Rauf wrote: > I got a little question regarding wildcards of nw_src address. I have > written a controller application which sets the wildcards as following > > 1. ofm->match.wildcards = htonl((((OFPFW_ALL & ~ OFPFW_DL_SRC) & ~ > OFPFW_DL_DST) & ~ OFPFW_DL_TYPE) & ~ OFPFW_NW_SRC_ALL); > The above statement yields wildcards 0000 0000 0011 1111 11*01 1111* 1110 > 0011. > > 2. The bits in 'bold' represents the nw_src_mask. The 0 at extreme left > tells that not every bit of nw_src is wildcarded. (if that bit is '1', it > will say to wildcard each and every bit of nw_src. right?)
Yes. > 3. The value of rest of bits represents that how many LSBs should be > wildcarded. In our example, it tells that least 31 bits should be > wildcarded. O.K? Not "at least" but exactly 31 bits. > An IP netmask is generated with a 1 in each bit that must match and a > 0 in each bit that is wildcarded. I am expecting that OVS should > generate the value of nw_src_mask = 1111 1111 1111 1111 1111 1111 1111 > 1111. I don't see how that wildcards any bits at all, let alone 31 bits. > (On the other hand, the value of nw_dst_mask = 0000 0000 0000 0000 > 0000 0000 0000 0000). For nw_dst_mask, the results are according to > expectations. But this is not the case for nw_src_mask. OVS is > generating the nw_src_mask = 0x80000000. 0x80000000 specifies that the highest bit must match and that the other 31 bits are wildcarded. Isn't that what you are asking for? _______________________________________________ discuss mailing list [email protected] http://openvswitch.org/mailman/listinfo/discuss
