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IP_HDRINCL fails on Intel-Mac

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IP_HDRINCL fails on Intel-Mac

Subject: IP_HDRINCL fails on Intel-Mac
From: Stephanie Wist <email@hidden>
Date: Thu, 28 Dec 2006 21:57:04 +0100


Hello,

I have encountered a strange problem: I'm using raw sockets ( socket(AF_INET, SOCK_RAW, IPPROTO_RAW) ) with the option IP_HDRINCL set to 1. ( setsockopt(sock, 0, IP_HDRINCL, &one, sizeof(one) ). This works fine for me on my Powerbook running on Jaguar and Panther, but fails on a new MacbookPro when calling sendto() with EINVAL.

I'm pretty sure that my self-built IP-header is correct, I compared the packet-data before sending and they were the same on the Powerbook and the MacbookPro.

Am I overlooking something? Is the option IP_HDRINCL disabled by purpose on the new Macs, as it is on WinXP (although the manpages state otherwise)? Or has anyone a functioning code snippet using raw sockets with IP_HDRINCL on a MacbookPro?


Wondering,
- Stephanie Wist

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