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net, syscall: Use native endianness for GNU/Linux netlink code.

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From-SVN: r186640
This commit is contained in:
Ian Lance Taylor 2012-04-20 20:11:28 +00:00
parent 63d1e46df0
commit d25a12fc2d
7 changed files with 14 additions and 67 deletions
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1
libgo/Makefile.am
View File

@ -1559,7 +1559,6 @@ s-syscall_arch: Makefile
echo "package syscall" > syscall_arch.go.tmp
echo 'const ARCH = "'$(GOARCH)'"' >> syscall_arch.go.tmp
echo 'const OS = "'$(GOOS)'"' >> syscall_arch.go.tmp
echo 'const BigEndian = $(GO_BIGENDIAN)' >> syscall_arch.go.tmp
$(SHELL) $(srcdir)/../move-if-change syscall_arch.go.tmp syscall_arch.go
$(STAMP) $@

2
libgo/Makefile.in
View File

@ -369,7 +369,6 @@ GOARCH = @GOARCH@
GOC = @GOC@
GOCFLAGS = $(CFLAGS)
GOOS = @GOOS@
GO_BIGENDIAN = @GO_BIGENDIAN@
GO_LIBCALL_OS_ARCH_FILE = @GO_LIBCALL_OS_ARCH_FILE@
GO_LIBCALL_OS_FILE = @GO_LIBCALL_OS_FILE@
GO_SYSCALL_OS_ARCH_FILE = @GO_SYSCALL_OS_ARCH_FILE@
@ -4372,7 +4371,6 @@ s-syscall_arch: Makefile
echo "package syscall" > syscall_arch.go.tmp
echo 'const ARCH = "'$(GOARCH)'"' >> syscall_arch.go.tmp
echo 'const OS = "'$(GOOS)'"' >> syscall_arch.go.tmp
echo 'const BigEndian = $(GO_BIGENDIAN)' >> syscall_arch.go.tmp
$(SHELL) $(srcdir)/../move-if-change syscall_arch.go.tmp syscall_arch.go
$(STAMP) $@

11
libgo/configure vendored
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@ -612,7 +612,6 @@ HAVE_STRERROR_R_FALSE
HAVE_STRERROR_R_TRUE
HAVE_SYS_MMAN_H_FALSE
HAVE_SYS_MMAN_H_TRUE
GO_BIGENDIAN
PTHREAD_LIBS
PTHREAD_CFLAGS
NET_LIBS
@ -11101,7 +11100,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 11104 "configure"
#line 11103 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -11207,7 +11206,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 11210 "configure"
#line 11209 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -14409,12 +14408,6 @@ $as_echo "#define AC_APPLE_UNIVERSAL_BUILD 1" >>confdefs.h
presetting ac_cv_c_bigendian=no (or yes) will help" "$LINENO" 5 ;;
esac
case $ac_cv_c_bigendian in
yes) GO_BIGENDIAN=true ;;
no) GO_BIGENDIAN=false ;;
*) as_fn_error "unknown endianness" "$LINENO" 5 ;;
esac

6
libgo/configure.ac
View File

@ -400,12 +400,6 @@ dnl Test if -lrt is required for sched_yield.
AC_SEARCH_LIBS([sched_yield], [rt])
AC_C_BIGENDIAN
case $ac_cv_c_bigendian in
yes) GO_BIGENDIAN=true ;;
no) GO_BIGENDIAN=false ;;
*) AC_MSG_ERROR([unknown endianness]) ;;
esac
AC_SUBST(GO_BIGENDIAN)
GCC_CHECK_UNWIND_GETIPINFO

17
libgo/go/net/interface_linux.go
View File

@ -64,11 +64,7 @@ func newLink(ifim *syscall.IfInfomsg, attrs []syscall.NetlinkRouteAttr) Interfac
case syscall.IFLA_IFNAME:
ifi.Name = string(a.Value[:len(a.Value)-1])
case syscall.IFLA_MTU:
if syscall.BigEndian {
ifi.MTU = int(uint32(a.Value[0])<<24 | uint32(a.Value[1])<<16 | uint32(a.Value[2])<<8 | uint32(a.Value[3]))
} else {
ifi.MTU = int(uint32(a.Value[3])<<24 | uint32(a.Value[2])<<16 | uint32(a.Value[1])<<8 | uint32(a.Value[0]))
}
ifi.MTU = int(*(*uint32)(unsafe.Pointer(&a.Value[:4][0])))
}
}
return ifi
@ -197,15 +193,14 @@ func parseProcNetIGMP(path string, ifi *Interface) []Addr {
name = f[1]
case len(f[0]) == 8:
if ifi == nil || name == ifi.Name {
// The Linux kernel puts the IP
// address in /proc/net/igmp in native
// endianness.
for i := 0; i+1 < len(f[0]); i += 2 {
b[i/2], _ = xtoi2(f[0][i:i+2], 0)
}
var ifma IPAddr
if syscall.BigEndian {
ifma = IPAddr{IP: IPv4(b[0], b[1], b[2], b[3])}
} else {
ifma = IPAddr{IP: IPv4(b[3], b[2], b[1], b[0])}
}
i := *(*uint32)(unsafe.Pointer(&b[:4][0]))
ifma := IPAddr{IP: IPv4(byte(i>>24), byte(i>>16), byte(i>>8), byte(i))}
ifmat = append(ifmat, ifma.toAddr())
}
}

43
libgo/go/syscall/netlink_linux.go
View File

@ -30,43 +30,12 @@ type NetlinkRouteRequest struct {
func (rr *NetlinkRouteRequest) toWireFormat() []byte {
b := make([]byte, rr.Header.Len)
if BigEndian {
b[0] = byte(rr.Header.Len >> 24)
b[1] = byte(rr.Header.Len >> 16)
b[2] = byte(rr.Header.Len >> 8)
b[3] = byte(rr.Header.Len)
b[4] = byte(rr.Header.Type >> 8)
b[5] = byte(rr.Header.Type)
b[6] = byte(rr.Header.Flags >> 8)
b[7] = byte(rr.Header.Flags)
b[8] = byte(rr.Header.Seq >> 24)
b[9] = byte(rr.Header.Seq >> 16)
b[10] = byte(rr.Header.Seq >> 8)
b[11] = byte(rr.Header.Seq)
b[12] = byte(rr.Header.Pid >> 24)
b[13] = byte(rr.Header.Pid >> 16)
b[14] = byte(rr.Header.Pid >> 8)
b[15] = byte(rr.Header.Pid)
b[16] = byte(rr.Data.Family)
} else {
b[0] = byte(rr.Header.Len)
b[1] = byte(rr.Header.Len >> 8)
b[2] = byte(rr.Header.Len >> 16)
b[3] = byte(rr.Header.Len >> 24)
b[4] = byte(rr.Header.Type)
b[5] = byte(rr.Header.Type >> 8)
b[6] = byte(rr.Header.Flags)
b[7] = byte(rr.Header.Flags >> 8)
b[8] = byte(rr.Header.Seq)
b[9] = byte(rr.Header.Seq >> 8)
b[10] = byte(rr.Header.Seq >> 16)
b[11] = byte(rr.Header.Seq >> 24)
b[12] = byte(rr.Header.Pid)
b[13] = byte(rr.Header.Pid >> 8)
b[14] = byte(rr.Header.Pid >> 16)
b[15] = byte(rr.Header.Pid >> 24)
b[16] = byte(rr.Data.Family)
}
*(*uint32)(unsafe.Pointer(&b[0:4][0])) = rr.Header.Len
*(*uint16)(unsafe.Pointer(&b[4:6][0])) = rr.Header.Type
*(*uint16)(unsafe.Pointer(&b[6:8][0])) = rr.Header.Flags
*(*uint32)(unsafe.Pointer(&b[8:12][0])) = rr.Header.Seq
*(*uint32)(unsafe.Pointer(&b[12:16][0])) = rr.Header.Pid
b[16] = byte(rr.Data.Family)
return b
}

1
libgo/testsuite/Makefile.in
View File

@ -86,7 +86,6 @@ GOARCH = @GOARCH@
GOC = @GOC@
GOCFLAGS = @GOCFLAGS@
GOOS = @GOOS@
GO_BIGENDIAN = @GO_BIGENDIAN@
GO_LIBCALL_OS_ARCH_FILE = @GO_LIBCALL_OS_ARCH_FILE@
GO_LIBCALL_OS_FILE = @GO_LIBCALL_OS_FILE@
GO_SYSCALL_OS_ARCH_FILE = @GO_SYSCALL_OS_ARCH_FILE@