move src/syscall to src/lib/syscall.

enforce rule: all kernel data structures and constants
	go in syscall module.
move things that should be in syscall out of net.
make net a single package.

R=r
OCL=15985
CL=15994

1 files changed, 70 insertions, 0 deletions

diff --git a/src/lib/net/net_linux.go b/src/lib/net/net_linux.go
new file mode 100644
index 0000000000..bc0b8f6d3a
--- /dev/null
+++ b/src/lib/net/net_linux.go
@@ -0,0 +1,70 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package net
+
+import (
+	"os";
+	"syscall";
+	"net"
+)
+
+export func IPv4ToSockaddr(p *[]byte, port int) (sa1 *syscall.Sockaddr, err *os.Error) {
+	p = ToIPv4(p)
+	if p == nil || port < 0 || port > 0xFFFF {
+		return nil, os.EINVAL
+	}
+	sa := new(syscall.SockaddrInet4);
+	sa.family = syscall.AF_INET;
+	sa.port[0] = byte(port>>8);
+	sa.port[1] = byte(port);
+	for i := 0; i < IPv4len; i++ {
+		sa.addr[i] = p[i]
+	}
+	return syscall.SockaddrInet4ToSockaddr(sa), nil
+}
+
+export func IPv6ToSockaddr(p *[]byte, port int) (sa1 *syscall.Sockaddr, err *os.Error) {
+	p = ToIPv6(p)
+	if p == nil || port < 0 || port > 0xFFFF {
+		return nil, os.EINVAL
+	}
+	sa := new(syscall.SockaddrInet6);
+	sa.family = syscall.AF_INET6;
+	sa.port[0] = byte(port>>8);
+	sa.port[1] = byte(port);
+	for i := 0; i < IPv6len; i++ {
+		sa.addr[i] = p[i]
+	}
+	return syscall.SockaddrInet6ToSockaddr(sa), nil
+}
+
+export func SockaddrToIP(sa1 *syscall.Sockaddr) (p *[]byte, port int, err *os.Error) {
+	switch sa1.family {
+	case syscall.AF_INET:
+		sa := syscall.SockaddrToSockaddrInet4(sa1);
+		a := ToIPv6(&sa.addr)
+		if a == nil {
+			return nil, 0, os.EINVAL
+		}
+		return a, int(sa.port[0])<<8 + int(sa.port[1]), nil
+	case syscall.AF_INET6:
+		sa := syscall.SockaddrToSockaddrInet6(sa1);
+		a := ToIPv6(&sa.addr)
+		if a == nil {
+			return nil, 0, os.EINVAL
+		}
+		return a, int(sa.port[0])<<8 + int(sa.port[1]), nil
+	default:
+		return nil, 0, os.EINVAL
+	}
+	return nil, 0, nil	// not reached
+}
+
+export func ListenBacklog() int64 {
+	// TODO: Read the limit from /proc/sys/net/core/somaxconn,
+	// to take advantage of kernels that have raised the limit.
+	return syscall.SOMAXCONN
+}
+