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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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1
arch/alpha/include/asm/socket.h
View file

@ -33,6 +33,7 @@
#define SO_SNDTIMEO 0x1013
#define SO_ACCEPTCONN 0x1014
#define SO_PROTOCOL 0x1028
#define SO_DOMAIN 0x1029
/* linux-specific, might as well be the same as on i386 */
#define SO_NO_CHECK 11

1
arch/arm/include/asm/socket.h
View file

@ -58,5 +58,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_SOCKET_H */

1
arch/avr32/include/asm/socket.h
View file

@ -58,5 +58,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* __ASM_AVR32_SOCKET_H */

1
arch/cris/include/asm/socket.h
View file

@ -60,6 +60,7 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_SOCKET_H */

1
arch/frv/include/asm/socket.h
View file

@ -58,6 +58,7 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_SOCKET_H */

1
arch/h8300/include/asm/socket.h
View file

@ -58,5 +58,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_SOCKET_H */

1
arch/ia64/include/asm/socket.h
View file

@ -67,5 +67,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_IA64_SOCKET_H */

1
arch/m32r/include/asm/socket.h
View file

@ -58,5 +58,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_M32R_SOCKET_H */

1
arch/m68k/include/asm/socket.h
View file

@ -58,5 +58,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_SOCKET_H */

1
arch/microblaze/include/asm/socket.h
View file

@ -67,5 +67,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_MICROBLAZE_SOCKET_H */

1
arch/mips/include/asm/socket.h
View file

@ -43,6 +43,7 @@ To add: #define SO_REUSEPORT 0x0200 /* Allow local address and port reuse. */
#define SO_RCVTIMEO 0x1006 /* receive timeout */
#define SO_ACCEPTCONN 0x1009
#define SO_PROTOCOL 0x1028 /* protocol type */
#define SO_DOMAIN 0x1029 /* domain/socket family */
/* linux-specific, might as well be the same as on i386 */
#define SO_NO_CHECK 11

1
arch/mn10300/include/asm/socket.h
View file

@ -58,5 +58,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_SOCKET_H */

1
arch/parisc/include/asm/socket.h
View file

@ -25,6 +25,7 @@
#define SO_ERROR 0x1007
#define SO_TYPE 0x1008
#define SO_PROTOCOL 0x1028
#define SO_DOMAIN 0x1029
#define SO_PEERNAME 0x2000
#define SO_NO_CHECK 0x400b

1
arch/powerpc/include/asm/socket.h
View file

@ -65,5 +65,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_POWERPC_SOCKET_H */

1
arch/s390/include/asm/socket.h
View file

@ -66,5 +66,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_SOCKET_H */

1
arch/sparc/include/asm/socket.h
View file

@ -30,6 +30,7 @@
#define SO_ERROR 0x1007
#define SO_TYPE 0x1008
#define SO_PROTOCOL 0x1028
#define SO_DOMAIN 0x1029
/* Linux specific, keep the same. */

1
arch/x86/include/asm/socket.h
View file

@ -58,5 +58,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _ASM_X86_SOCKET_H */

1
arch/xtensa/include/asm/socket.h
View file

@ -69,5 +69,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* _XTENSA_SOCKET_H */

1
include/asm-generic/socket.h
View file

@ -61,5 +61,6 @@
#define SCM_TIMESTAMPING SO_TIMESTAMPING
#define SO_PROTOCOL 38
#define SO_DOMAIN 39
#endif /* __ASM_GENERIC_SOCKET_H */

5
net/core/sock.c
View file

@ -483,6 +483,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
break;
case SO_TYPE:
case SO_PROTOCOL:
case SO_DOMAIN:
case SO_ERROR:
ret = -ENOPROTOOPT;
break;
@ -769,6 +770,10 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
v.val = sk->sk_protocol;
break;
case SO_DOMAIN:
v.val = sk->sk_family;
break;
case SO_ERROR:
v.val = -sock_error(sk);
if (v.val == 0)