On Tue, Apr 27, 2004 at 11:16:39PM +0200, Mark Santcroos wrote: > Hi, > > On Tue, Apr 27, 2004 at 10:05:43PM +0300, Ruslan Ermilov wrote: > > Have the raw IP code set csum_flags |= CSUM_UDP (and set csum_data > > correctly) in m->m_pkthdr, if ip_p == IPPROTO_UDP && uh_csum == 0. > > Do the same thing for IPPROTO_TCP. > > Like I said, I'm willing to tackle this in the kernel, but for now I also > need a userland-only solution. > OK.
> I guess I can fetch the IP address from the first ethernet iface and use > that as the src address for the IP packet. > getifaddrs(3). > Then I have enough information to calculate the UDP checksum in userland, > don't I? > Yes, you do. Another possibility would be to emit UDP datagrams unchecksummed, by leaving the checksum field as zero. Cheers, -- Ruslan Ermilov [EMAIL PROTECTED] FreeBSD committer
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