From: Jan Engelhardt Date: Tue, 4 Aug 2009 07:28:28 +0000 (+0000) Subject: net: implement a SO_PROTOCOL getsockoption X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=49c794e94649020248e37b78db16cd25bad38b4f;p=linux.git net: implement a SO_PROTOCOL getsockoption Similar to SO_TYPE returning the socket type, SO_PROTOCOL allows to retrieve the protocol used with a given socket. I am not quite sure why we have that-many copies of socket.h, and why the values are not the same on all arches either, but for where hex numbers dominate, I use 0x1029 for SO_PROTOCOL as that seems to be the next free unused number across a bunch of operating systems, or so Google results make me want to believe. SO_PROTOCOL for others just uses the next free Linux number, 38. Signed-off-by: Jan Engelhardt Signed-off-by: David S. Miller --- diff --git a/arch/alpha/include/asm/socket.h b/arch/alpha/include/asm/socket.h index 3641ec1452f49..2f8b4d3777497 100644 --- a/arch/alpha/include/asm/socket.h +++ b/arch/alpha/include/asm/socket.h @@ -32,6 +32,7 @@ #define SO_RCVTIMEO 0x1012 #define SO_SNDTIMEO 0x1013 #define SO_ACCEPTCONN 0x1014 +#define SO_PROTOCOL 0x1028 /* linux-specific, might as well be the same as on i386 */ #define SO_NO_CHECK 11 diff --git a/arch/arm/include/asm/socket.h b/arch/arm/include/asm/socket.h index 537de4e0ef506..7f47454ffbf3e 100644 --- a/arch/arm/include/asm/socket.h +++ b/arch/arm/include/asm/socket.h @@ -57,4 +57,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_SOCKET_H */ diff --git a/arch/avr32/include/asm/socket.h b/arch/avr32/include/asm/socket.h index 04c8606197007..6af2866a4f003 100644 --- a/arch/avr32/include/asm/socket.h +++ b/arch/avr32/include/asm/socket.h @@ -57,4 +57,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* __ASM_AVR32_SOCKET_H */ diff --git a/arch/cris/include/asm/socket.h b/arch/cris/include/asm/socket.h index d5cf740054082..f3859fb0990c6 100644 --- a/arch/cris/include/asm/socket.h +++ b/arch/cris/include/asm/socket.h @@ -59,6 +59,8 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_SOCKET_H */ diff --git a/arch/frv/include/asm/socket.h b/arch/frv/include/asm/socket.h index 57c3d4054e8bd..8dab3486ffa40 100644 --- a/arch/frv/include/asm/socket.h +++ b/arch/frv/include/asm/socket.h @@ -57,5 +57,7 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_SOCKET_H */ diff --git a/arch/h8300/include/asm/socket.h b/arch/h8300/include/asm/socket.h index 602518a70a1a4..ba770d09cd637 100644 --- a/arch/h8300/include/asm/socket.h +++ b/arch/h8300/include/asm/socket.h @@ -57,4 +57,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_SOCKET_H */ diff --git a/arch/ia64/include/asm/socket.h b/arch/ia64/include/asm/socket.h index 745421225ec6b..091cd9d47d0fe 100644 --- a/arch/ia64/include/asm/socket.h +++ b/arch/ia64/include/asm/socket.h @@ -66,4 +66,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_IA64_SOCKET_H */ diff --git a/arch/m32r/include/asm/socket.h b/arch/m32r/include/asm/socket.h index be7ed589af5cb..d36f5928fb798 100644 --- a/arch/m32r/include/asm/socket.h +++ b/arch/m32r/include/asm/socket.h @@ -57,4 +57,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_M32R_SOCKET_H */ diff --git a/arch/m68k/include/asm/socket.h b/arch/m68k/include/asm/socket.h index ca87f938b03f1..060cb7ed024fc 100644 --- a/arch/m68k/include/asm/socket.h +++ b/arch/m68k/include/asm/socket.h @@ -57,4 +57,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_SOCKET_H */ diff --git a/arch/microblaze/include/asm/socket.h b/arch/microblaze/include/asm/socket.h index 8259368603149..96bf8bfa935e1 100644 --- a/arch/microblaze/include/asm/socket.h +++ b/arch/microblaze/include/asm/socket.h @@ -66,4 +66,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_MICROBLAZE_SOCKET_H */ diff --git a/arch/mips/include/asm/socket.h b/arch/mips/include/asm/socket.h index 2abca17801696..289ce5f5f2a30 100644 --- a/arch/mips/include/asm/socket.h +++ b/arch/mips/include/asm/socket.h @@ -42,6 +42,7 @@ To add: #define SO_REUSEPORT 0x0200 /* Allow local address and port reuse. */ #define SO_SNDTIMEO 0x1005 /* send timeout */ #define SO_RCVTIMEO 0x1006 /* receive timeout */ #define SO_ACCEPTCONN 0x1009 +#define SO_PROTOCOL 0x1028 /* protocol type */ /* linux-specific, might as well be the same as on i386 */ #define SO_NO_CHECK 11 diff --git a/arch/mn10300/include/asm/socket.h b/arch/mn10300/include/asm/socket.h index fb5daf438ec92..19d7cf709b77b 100644 --- a/arch/mn10300/include/asm/socket.h +++ b/arch/mn10300/include/asm/socket.h @@ -57,4 +57,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_SOCKET_H */ diff --git a/arch/parisc/include/asm/socket.h b/arch/parisc/include/asm/socket.h index 885472bf7b788..a658b09df624e 100644 --- a/arch/parisc/include/asm/socket.h +++ b/arch/parisc/include/asm/socket.h @@ -24,6 +24,7 @@ #define SO_RCVTIMEO 0x1006 #define SO_ERROR 0x1007 #define SO_TYPE 0x1008 +#define SO_PROTOCOL 0x1028 #define SO_PEERNAME 0x2000 #define SO_NO_CHECK 0x400b diff --git a/arch/powerpc/include/asm/socket.h b/arch/powerpc/include/asm/socket.h index 1e5cfad0e3f7d..609049d7117e9 100644 --- a/arch/powerpc/include/asm/socket.h +++ b/arch/powerpc/include/asm/socket.h @@ -64,4 +64,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_POWERPC_SOCKET_H */ diff --git a/arch/s390/include/asm/socket.h b/arch/s390/include/asm/socket.h index 02330c50241b1..65baa9a83abc3 100644 --- a/arch/s390/include/asm/socket.h +++ b/arch/s390/include/asm/socket.h @@ -65,4 +65,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_SOCKET_H */ diff --git a/arch/sparc/include/asm/socket.h b/arch/sparc/include/asm/socket.h index 982a12f959f47..9cbbfafd05384 100644 --- a/arch/sparc/include/asm/socket.h +++ b/arch/sparc/include/asm/socket.h @@ -29,6 +29,8 @@ #define SO_RCVBUFFORCE 0x100b #define SO_ERROR 0x1007 #define SO_TYPE 0x1008 +#define SO_PROTOCOL 0x1028 + /* Linux specific, keep the same. */ #define SO_NO_CHECK 0x000b diff --git a/arch/x86/include/asm/socket.h b/arch/x86/include/asm/socket.h index ca8bf2cd0ba99..1077d2535a320 100644 --- a/arch/x86/include/asm/socket.h +++ b/arch/x86/include/asm/socket.h @@ -57,4 +57,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _ASM_X86_SOCKET_H */ diff --git a/arch/xtensa/include/asm/socket.h b/arch/xtensa/include/asm/socket.h index dd1a7a4a1ceaa..e47f172142f1e 100644 --- a/arch/xtensa/include/asm/socket.h +++ b/arch/xtensa/include/asm/socket.h @@ -68,4 +68,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* _XTENSA_SOCKET_H */ diff --git a/include/asm-generic/socket.h b/include/asm-generic/socket.h index 5d79e409241ce..7e24d186616e0 100644 --- a/include/asm-generic/socket.h +++ b/include/asm-generic/socket.h @@ -60,4 +60,6 @@ #define SO_TIMESTAMPING 37 #define SCM_TIMESTAMPING SO_TIMESTAMPING +#define SO_PROTOCOL 38 + #endif /* __ASM_GENERIC_SOCKET_H */ diff --git a/net/core/sock.c b/net/core/sock.c index a324a80c163ef..ebce661234acd 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -482,6 +482,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname, sk->sk_reuse = valbool; break; case SO_TYPE: + case SO_PROTOCOL: case SO_ERROR: ret = -ENOPROTOOPT; break; @@ -764,6 +765,10 @@ int sock_getsockopt(struct socket *sock, int level, int optname, v.val = sk->sk_type; break; + case SO_PROTOCOL: + v.val = sk->sk_protocol; + break; + case SO_ERROR: v.val = -sock_error(sk); if (v.val == 0)