There are a few problems here. I believe that your call to output will cause the packet to go through your output filter again. I'm not sure why you're calling m_copym. You could just pass m to dlil_inject_if_output and return EJUSTRETURN. -josh On Monday, July 7, 2003, at 10:13, Hale, Darrian J wrote: Hello, Has anyone ever used dlil_inject_if_output or dlil_inject_pr_output successfully? I cant seem to get either one to work correctly. Whenever I use either of them i seem to get repeat packets. I don't get this problem using dlil_inject_xx_input however. A simple test I tried for the interface filter is as follows: u_long if_hook_id; // Do some startup to get if_hook_id // Function that gets called on outbound packet int if_hook_output(caddr_t cookie, struct ifnet **ifp, struct mbuf **m) { int ret = 0; struct mbuf *mbf = NULL; mbf = m_copym(*m,0,M_COPYALL,M_WAIT); if((ret = dlil_inject_if_output(mbf,if_hook_id)) != 0) printf("dlil_inject_if_output failure, errno %d...\n",ret); return -1; } Thanks for your help, Darrian _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel@lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.