Messages in this thread | | | From | Paul Rusty Russell <> | Subject | Injecting packets back into IP system... | Date | Wed, 20 May 1998 22:52:20 +0930 |
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Hi all,
I'm using the NETLINK device (from the firewall chains) to copy packets out to userspace, but reinjecting the packets doesn't seem to have the desired effect if the packet is destined for the same machine. For example, injecting a raw ICMP ping packet does not elicit an echo response (and I am told that a TCP syn packet is treated with similar distain). Here is the code I am using (minus error checks):
struct sockaddr_in dst; fw_reinject_handle = socket(AF_INET, SOCK_RAW, IPPROTO_RAW);
dst.sin_addr.s_addr = pkt->daddr; dst.sin_family = AF_INET;
sendto(fw_reinject_handle, pkt, ntohs(pkt->tot_len), 0, (struct sockaddr *)&dst, sizeof dst);
Is there a better way to do this, and have the packet treated as if it is real? Or am I going to have to hack something (if so, where?)
Thanks, Rusty. -- .sig lost in the mail.
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