Forward this to expose to wider audience. ----- Forwarded message from Sten Spans <[EMAIL PROTECTED]> -----
From: Sten Spans <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Cc: Julian Elischer <[EMAIL PROTECTED]> Subject: if_tap unaligned access problem Date: Wed, 27 Apr 2005 14:54:29 +0200 (CEST) Delivered-To: [EMAIL PROTECTED] A quick question about if_tap, the tapwrite function ( which copies an ethernet frame into an mbuf using uiotombuf ) is broken on alpha and sparc64. The 14 byte ethernet header causes the rest of the frame to be misaligned on 4 byte boundaries. This causes crashes in various other parts of the kernel. The solution would be to shift the mbuf by two bytes, but I am not quite sure where this should happen. If_tun which is almost the same code has no such problem because it lacks the 14 byte ethernet header. Openbsd has a combined tun/tap driver, with some alignment hacks to fix this. Should I create a pr for this problem, or is there a simple quick fix possible ? -- Sten Spans "There is a crack in everything, that's how the light gets in." Leonard Cohen - Anthem ----- End forwarded message ----- -- Totus tuus, Glebius. GLEBIUS-RIPN GLEB-RIPE _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[EMAIL PROTECTED]"
