(please CC your reply to me directly at ogg@research.natlab.philips.com) Hi ! For several weeks now I have been trying to set a flow label and/or Traffic Class in IPv6 UDP messages (kernel 2.4.18). There seems to be no documentation available about this apart from -IETF: Advanced sockets API for IPv6 (lacking the FLOWLABEL_MGR approach taken in Linux) - IETF: drafts on IPv6 API (flow labels API has been withdrawn) - IPv6 Flow Labels In Linux-2.2 (by Alexey N. Kuznetsov) 1999. (lacks #include requirements) -everything in /usr/include and /usr/src/linux-2.4.18 The problem is: What header-files should I include when compiling a program that uses IPv6 sockets and requests a specific flow label from the flow label manager system? When I include <linux/in6.h> which contains the necessary #define's even without ANY other #include statements GCC breaks with a "redefinition" error?!? I conclude from this that <linux/in6.h> was not meant to be included in user level applications (the same goes for <linux/ipv66.h>). The question remains: "which header SHOULD be included for this to work?" Attached you canl find my simple UDP sender program, wich does not compile. Ofcourse I don't expect you to start debugging my code, but I suppose it may be helpful. _____________________________________________ Felix Ogg (TU/e graduate student) Netherlands
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