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net: implement a SO_DOMAIN getsockoption

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This sockopt goes in line with SO_TYPE and SO_PROTOCOL. It makes it
possible for userspace programs to pass around file descriptors — I
am referring to arguments-to-functions, but it may even work for the
fd passing over UNIX sockets — without needing to also pass the
auxiliary information (PF_INET6/IPPROTO_TCP).

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jan Engelhardt 2009-08-04 07:28:29 +00:00 • committed by David S. Miller
parent 49c794e946
commit 0d6038ee76
20 changed files with 24 additions and 0 deletions
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include/asm-generic/socket.h
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@ -61,5 +61,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* __ASM_GENERIC_SOCKET_H */