export var (
DNS_InternalError = os.NewError("internal dns error");
DNS_MissingConfig = os.NewError("no dns configuration");
- DNS_NoAnswer = os.NewError("dns got no answer");
+ DNS_No_Answer = os.NewError("dns got no answer");
DNS_BadRequest = os.NewError("malformed dns request");
DNS_BadReply = os.NewError("malformed dns reply");
DNS_ServerFailure = os.NewError("dns server failure");
// Send a request on the connection and hope for a reply.
// Up to cfg.attempts attempts.
-func Exchange(cfg *DNS_Config, c Conn, name string) (m *DNS_Msg, err *os.Error) {
+func _Exchange(cfg *DNS_Config, c Conn, name string) (m *DNS_Msg, err *os.Error) {
if len(name) >= 256 {
return nil, DNS_NameTooLong
}
}
return in, nil
}
- return nil, DNS_NoAnswer
+ return nil, DNS_No_Answer
}
// Find answer for name in dns message.
// On return, if err == nil, addrs != nil.
// TODO(rsc): Maybe return [][]byte (==[]IPAddr) instead?
-func Answer(name string, dns *DNS_Msg) (addrs []string, err *os.Error) {
+func _Answer(name string, dns *DNS_Msg) (addrs []string, err *os.Error) {
addrs = make([]string, 0, len(dns.answer));
if dns.rcode == DNS_RcodeNameError && dns.authoritative {
}
// Do a lookup for a single name, which must be rooted
-// (otherwise Answer will not find the answers).
-func TryOneName(cfg *DNS_Config, name string) (addrs []string, err *os.Error) {
+// (otherwise _Answer will not find the answers).
+func _TryOneName(cfg *DNS_Config, name string) (addrs []string, err *os.Error) {
err = DNS_NoServers;
for i := 0; i < len(cfg.servers); i++ {
// Calling Dial here is scary -- we have to be sure
err = cerr;
continue;
}
- msg, merr := Exchange(cfg, c, name);
+ msg, merr := _Exchange(cfg, c, name);
c.Close();
if merr != nil {
err = merr;
continue;
}
- addrs, aerr := Answer(name, msg);
+ addrs, aerr := _Answer(name, msg);
if aerr != nil && aerr != DNS_NameNotFound {
err = aerr;
continue;
var cfg *DNS_Config
-func LoadConfig() {
+func _LoadConfig() {
cfg = DNS_ReadConfig();
}
// TODO(rsc): Pick out obvious non-DNS names to avoid
// sending stupid requests to the server?
- once.Do(&LoadConfig);
+ once.Do(&_LoadConfig);
if cfg == nil {
err = DNS_MissingConfig;
return;
rname += ".";
}
// Can try as ordinary name.
- addrs, aerr := TryOneName(cfg, rname);
+ addrs, aerr := _TryOneName(cfg, rname);
if aerr == nil {
return rname, addrs, nil;
}
if newname[len(newname)-1] != '.' {
newname += "."
}
- addrs, aerr := TryOneName(cfg, newname);
+ addrs, aerr := _TryOneName(cfg, newname);
if aerr == nil {
return newname, addrs, nil;
}
// of the host name to get the default search domain.
// We assume it's in resolv.conf anyway.
export func DNS_ReadConfig() *DNS_Config {
- file := Open("/etc/resolv.conf");
+ file := _Open("/etc/resolv.conf");
if file == nil {
return nil
}
conf.rotate = false;
var err *os.Error;
for line, ok := file.ReadLine(); ok; line, ok = file.ReadLine() {
- f := GetFields(line);
+ f := _GetFields(line);
if len(f) < 1 {
continue;
}
s := f[i];
switch {
case len(s) >= 6 && s[0:6] == "ndots:":
- n, i, ok := Dtoi(s, 6);
+ n, i, ok := _Dtoi(s, 6);
if n < 1 {
n = 1
}
conf.ndots = n;
case len(s) >= 8 && s[0:8] == "timeout:":
- n, i, ok := Dtoi(s, 8);
+ n, i, ok := _Dtoi(s, 8);
if n < 1 {
n = 1
}
conf.timeout = n;
case len(s) >= 8 && s[0:9] == "attempts:":
- n, i, ok := Dtoi(s, 9);
+ n, i, ok := _Dtoi(s, 9);
if n < 1 {
n = 1
}
"reflect";
)
-// Packet formats
+// _Packet formats
// Wire constants.
export const (
)
// The wire format for the DNS packet header.
-type DNS_Header struct {
+type _DNS_Header struct {
id uint16;
bits uint16;
qdcount, ancount, nscount, arcount uint16;
}
const (
- // DNS_Header.bits
- QR = 1<<15; // query/response (response=1)
- AA = 1<<10; // authoritative
- TC = 1<<9; // truncated
- RD = 1<<8; // recursion desired
- RA = 1<<7; // recursion available
+ // _DNS_Header.bits
+ _QR = 1<<15; // query/response (response=1)
+ _AA = 1<<10; // authoritative
+ _TC = 1<<9; // truncated
+ _RD = 1<<8; // recursion desired
+ _RA = 1<<7; // recursion available
)
// DNS queries.
}
-// Packing and unpacking.
+// _Packing and unpacking.
//
// All the packers and unpackers take a (msg []byte, off int)
// and return (off1 int, ok bool). If they return ok==false, they
DNS_TypeA: func() DNS_RR { return new(DNS_RR_A) },
}
-// Pack a domain name s into msg[off:].
+// _Pack a domain name s into msg[off:].
// Domain names are a sequence of counted strings
// split at the dots. They end with a zero-length string.
-func PackDomainName(s string, msg []byte, off int) (off1 int, ok bool) {
+func _PackDomainName(s string, msg []byte, off int) (off1 int, ok bool) {
// Add trailing dot to canonicalize name.
if n := len(s); n == 0 || s[n-1] != '.' {
s += ".";
return off, true
}
-// Unpack a domain name.
+// _Unpack a domain name.
// In addition to the simple sequences of counted strings above,
// domain names are allowed to refer to strings elsewhere in the
// packet, to avoid repeating common suffixes when returning
// which is where the next record will start.
// In theory, the pointers are only allowed to jump backward.
// We let them jump anywhere and stop jumping after a while.
-func UnpackDomainName(msg []byte, off int) (s string, off1 int, ok bool) {
+func _UnpackDomainName(msg []byte, off int) (s string, off1 int, ok bool) {
s = "";
ptr := 0; // number of pointers followed
Loop:
return s, off1, true
}
-// Pack a reflect.StructValue into msg. Struct members can only be uint16, uint32, string,
+// _Pack a reflect.StructValue into msg. Struct members can only be uint16, uint32, string,
// and other (often anonymous) structs.
-func PackStructValue(val reflect.StructValue, msg []byte, off int) (off1 int, ok bool) {
+func _PackStructValue(val reflect.StructValue, msg []byte, off int) (off1 int, ok bool) {
for i := 0; i < val.Len(); i++ {
fld := val.Field(i);
name, typ, tag, xxx := val.Type().(reflect.StructType).Field(i);
fmt.Fprintf(os.Stderr, "net: dns: unknown packing type %v", fld.Type());
return len(msg), false;
case reflect.StructKind:
- off, ok = PackStructValue(fld.(reflect.StructValue), msg, off);
+ off, ok = _PackStructValue(fld.(reflect.StructValue), msg, off);
case reflect.Uint16Kind:
i := fld.(reflect.Uint16Value).Get();
if off+2 > len(msg) {
fmt.Fprintf(os.Stderr, "net: dns: unknown string tag %v", tag);
return len(msg), false;
case "domain-name":
- off, ok = PackDomainName(s, msg, off);
+ off, ok = _PackDomainName(s, msg, off);
if !ok {
return len(msg), false
}
return off, true
}
-func PackStruct(any interface{}, msg []byte, off int) (off1 int, ok bool) {
+func _PackStruct(any interface{}, msg []byte, off int) (off1 int, ok bool) {
val := reflect.NewValue(any).(reflect.PtrValue).Sub().(reflect.StructValue);
- off, ok = PackStructValue(val, msg, off);
+ off, ok = _PackStructValue(val, msg, off);
return off, ok
}
-// Unpack a reflect.StructValue from msg.
-// Same restrictions as PackStructValue.
-func UnpackStructValue(val reflect.StructValue, msg []byte, off int) (off1 int, ok bool) {
+// _Unpack a reflect.StructValue from msg.
+// Same restrictions as _PackStructValue.
+func _UnpackStructValue(val reflect.StructValue, msg []byte, off int) (off1 int, ok bool) {
for i := 0; i < val.Len(); i++ {
name, typ, tag, xxx := val.Type().(reflect.StructType).Field(i);
fld := val.Field(i);
fmt.Fprintf(os.Stderr, "net: dns: unknown packing type %v", fld.Type());
return len(msg), false;
case reflect.StructKind:
- off, ok = UnpackStructValue(fld.(reflect.StructValue), msg, off);
+ off, ok = _UnpackStructValue(fld.(reflect.StructValue), msg, off);
case reflect.Uint16Kind:
if off+2 > len(msg) {
return len(msg), false
fmt.Fprintf(os.Stderr, "net: dns: unknown string tag %v", tag);
return len(msg), false;
case "domain-name":
- s, off, ok = UnpackDomainName(msg, off);
+ s, off, ok = _UnpackDomainName(msg, off);
if !ok {
return len(msg), false
}
return off, true
}
-func UnpackStruct(any interface{}, msg []byte, off int) (off1 int, ok bool) {
+func _UnpackStruct(any interface{}, msg []byte, off int) (off1 int, ok bool) {
val := reflect.NewValue(any).(reflect.PtrValue).Sub().(reflect.StructValue);
- off, ok = UnpackStructValue(val, msg, off);
+ off, ok = _UnpackStructValue(val, msg, off);
return off, ok
}
// Doesn't care about the string tag "domain-name",
// but does look for an "ipv4" tag on uint32 variables,
// printing them as IP addresses.
-func PrintStructValue(val reflect.StructValue) string {
+func _PrintStructValue(val reflect.StructValue) string {
s := "{";
for i := 0; i < val.Len(); i++ {
if i > 0 {
kind := fld.Kind();
switch {
case kind == reflect.StructKind:
- s += PrintStructValue(fld.(reflect.StructValue));
+ s += _PrintStructValue(fld.(reflect.StructValue));
case kind == reflect.Uint32Kind && tag == "ipv4":
i := fld.(reflect.Uint32Value).Get();
s += fmt.Sprintf("%d.%d.%d.%d", (i>>24)&0xFF, (i>>16)&0xFF, (i>>8)&0xFF, i&0xFF);
return s;
}
-func PrintStruct(any interface{}) string {
+func _PrintStruct(any interface{}) string {
val := reflect.NewValue(any).(reflect.PtrValue).Sub().(reflect.StructValue);
- s := PrintStructValue(val);
+ s := _PrintStructValue(val);
return s
}
// Resource record packer.
-func PackRR(rr DNS_RR, msg []byte, off int) (off2 int, ok bool) {
+func _PackRR(rr DNS_RR, msg []byte, off int) (off2 int, ok bool) {
var off1 int;
// pack twice, once to find end of header
// and again to find end of packet.
// a bit inefficient but this doesn't need to be fast.
// off1 is end of header
// off2 is end of rr
- off1, ok = PackStruct(rr.Header(), msg, off);
- off2, ok = PackStruct(rr, msg, off);
+ off1, ok = _PackStruct(rr.Header(), msg, off);
+ off2, ok = _PackStruct(rr, msg, off);
if !ok {
return len(msg), false
}
// pack a third time; redo header with correct data length
rr.Header().rdlength = uint16(off2 - off1);
- PackStruct(rr.Header(), msg, off);
+ _PackStruct(rr.Header(), msg, off);
return off2, true
}
// Resource record unpacker.
-func UnpackRR(msg []byte, off int) (rr DNS_RR, off1 int, ok bool) {
+func _UnpackRR(msg []byte, off int) (rr DNS_RR, off1 int, ok bool) {
// unpack just the header, to find the rr type and length
var h DNS_RR_Header;
off0 := off;
- if off, ok = UnpackStruct(&h, msg, off); !ok {
+ if off, ok = _UnpackStruct(&h, msg, off); !ok {
return nil, len(msg), false
}
end := off+int(h.rdlength);
return &h, end, true
}
rr = mk();
- off, ok = UnpackStruct(rr, msg, off0);
+ off, ok = _UnpackStruct(rr, msg, off0);
if off != end {
return &h, end, true
}
// A manually-unpacked version of (id, bits).
// This is in its own struct for easy printing.
-type DNS_Msg_Top struct {
+type _DNS_Msg_Top struct {
id uint16;
response bool;
opcode int;
}
export type DNS_Msg struct {
- DNS_Msg_Top;
+ _DNS_Msg_Top;
question []DNS_Question;
answer []DNS_RR;
ns []DNS_RR;
func (dns *DNS_Msg) Pack() (msg []byte, ok bool) {
- var dh DNS_Header;
+ var dh _DNS_Header;
- // Convert convenient DNS_Msg into wire-like DNS_Header.
+ // Convert convenient DNS_Msg into wire-like _DNS_Header.
dh.id = dns.id;
dh.bits = uint16(dns.opcode)<<11 | uint16(dns.rcode);
if dns.recursion_available {
- dh.bits |= RA;
+ dh.bits |= _RA;
}
if dns.recursion_desired {
- dh.bits |= RD;
+ dh.bits |= _RD;
}
if dns.truncated {
- dh.bits |= TC;
+ dh.bits |= _TC;
}
if dns.authoritative {
- dh.bits |= AA;
+ dh.bits |= _AA;
}
if dns.response {
- dh.bits |= QR;
+ dh.bits |= _QR;
}
// Prepare variable sized arrays.
// big enough to hurt the allocator.
msg = make([]byte, 2000);
- // Pack it in: header and then the pieces.
+ // _Pack it in: header and then the pieces.
off := 0;
- off, ok = PackStruct(&dh, msg, off);
+ off, ok = _PackStruct(&dh, msg, off);
for i := 0; i < len(question); i++ {
- off, ok = PackStruct(&question[i], msg, off);
+ off, ok = _PackStruct(&question[i], msg, off);
}
for i := 0; i < len(answer); i++ {
- off, ok = PackStruct(answer[i], msg, off);
+ off, ok = _PackStruct(answer[i], msg, off);
}
for i := 0; i < len(ns); i++ {
- off, ok = PackStruct(ns[i], msg, off);
+ off, ok = _PackStruct(ns[i], msg, off);
}
for i := 0; i < len(extra); i++ {
- off, ok = PackStruct(extra[i], msg, off);
+ off, ok = _PackStruct(extra[i], msg, off);
}
if !ok {
return nil, false
func (dns *DNS_Msg) Unpack(msg []byte) bool {
// Header.
- var dh DNS_Header;
+ var dh _DNS_Header;
off := 0;
var ok bool;
- if off, ok = UnpackStruct(&dh, msg, off); !ok {
+ if off, ok = _UnpackStruct(&dh, msg, off); !ok {
return false
}
dns.id = dh.id;
- dns.response = (dh.bits & QR) != 0;
+ dns.response = (dh.bits & _QR) != 0;
dns.opcode = int(dh.bits >> 11) & 0xF;
- dns.authoritative = (dh.bits & AA) != 0;
- dns.truncated = (dh.bits & TC) != 0;
- dns.recursion_desired = (dh.bits & RD) != 0;
- dns.recursion_available = (dh.bits & RA) != 0;
+ dns.authoritative = (dh.bits & _AA) != 0;
+ dns.truncated = (dh.bits & _TC) != 0;
+ dns.recursion_desired = (dh.bits & _RD) != 0;
+ dns.recursion_available = (dh.bits & _RA) != 0;
dns.rcode = int(dh.bits & 0xF);
// Arrays.
dns.extra = make([]DNS_RR, dh.arcount);
for i := 0; i < len(dns.question); i++ {
- off, ok = UnpackStruct(&dns.question[i], msg, off);
+ off, ok = _UnpackStruct(&dns.question[i], msg, off);
}
for i := 0; i < len(dns.answer); i++ {
- dns.answer[i], off, ok = UnpackRR(msg, off);
+ dns.answer[i], off, ok = _UnpackRR(msg, off);
}
for i := 0; i < len(dns.ns); i++ {
- dns.ns[i], off, ok = UnpackRR(msg, off);
+ dns.ns[i], off, ok = _UnpackRR(msg, off);
}
for i := 0; i < len(dns.extra); i++ {
- dns.extra[i], off, ok = UnpackRR(msg, off);
+ dns.extra[i], off, ok = _UnpackRR(msg, off);
}
if !ok {
return false
}
func (dns *DNS_Msg) String() string {
- s := "DNS: "+PrintStruct(&dns.DNS_Msg_Top)+"\n";
+ s := "DNS: "+_PrintStruct(&dns._DNS_Msg_Top)+"\n";
if len(dns.question) > 0 {
s += "-- Questions\n";
for i := 0; i < len(dns.question); i++ {
- s += PrintStruct(&dns.question[i])+"\n";
+ s += _PrintStruct(&dns.question[i])+"\n";
}
}
if len(dns.answer) > 0 {
s += "-- Answers\n";
for i := 0; i < len(dns.answer); i++ {
- s += PrintStruct(dns.answer[i])+"\n";
+ s += _PrintStruct(dns.answer[i])+"\n";
}
}
if len(dns.ns) > 0 {
s += "-- Name servers\n";
for i := 0; i < len(dns.ns); i++ {
- s += PrintStruct(dns.ns[i])+"\n";
+ s += _PrintStruct(dns.ns[i])+"\n";
}
}
if len(dns.extra) > 0 {
s += "-- Extra\n";
for i := 0; i < len(dns.extra); i++ {
- s += PrintStruct(dns.extra[i])+"\n";
+ s += _PrintStruct(dns.extra[i])+"\n";
}
}
return s;
}
// Make reads and writes on fd return EAGAIN instead of blocking.
-func SetNonblock(fd int64) *os.Error {
+func _SetNonblock(fd int64) *os.Error {
flags, e := syscall.fcntl(fd, syscall.F_GETFL, 0);
if e != 0 {
return os.ErrnoToError(e)
}
-// A PollServer helps FDs determine when to retry a non-blocking
+// A _PollServer helps FDs determine when to retry a non-blocking
// read or write after they get EAGAIN. When an FD needs to wait,
// send the fd on s.cr (for a read) or s.cw (for a write) to pass the
// request to the poll server. Then receive on fd.cr/fd.cw.
-// When the PollServer finds that i/o on FD should be possible
+// When the _PollServer finds that i/o on FD should be possible
// again, it will send fd on fd.cr/fd.cw to wake any waiting processes.
// This protocol is implemented as s.WaitRead() and s.WaitWrite().
//
// To resolve this, the poll server waits not just on the FDs it has
// been given but also its own pipe. After sending on the
// buffered channel s.cr/s.cw, WaitRead/WaitWrite writes a
-// byte to the pipe, causing the PollServer's poll system call to
-// return. In response to the pipe being readable, the PollServer
+// byte to the pipe, causing the _PollServer's poll system call to
+// return. In response to the pipe being readable, the _PollServer
// re-polls its request channels.
//
// Note that the ordering is "send request" and then "wake up server".
// to send the request. Because the send must complete before the wakeup,
// the request channel must be buffered. A buffer of size 1 is sufficient
// for any request load. If many processes are trying to submit requests,
-// one will succeed, the PollServer will read the request, and then the
+// one will succeed, the _PollServer will read the request, and then the
// channel will be empty for the next process's request. A larger buffer
// might help batch requests.
-type PollServer struct {
+type _PollServer struct {
cr, cw chan *FD; // buffered >= 1
pr, pw *os.FD;
pending map[int64] *FD;
poll *Pollster; // low-level OS hooks
}
-func (s *PollServer) Run();
+func (s *_PollServer) Run();
-func NewPollServer() (s *PollServer, err *os.Error) {
- s = new(PollServer);
+func _NewPollServer() (s *_PollServer, err *os.Error) {
+ s = new(_PollServer);
s.cr = make(chan *FD, 1);
s.cw = make(chan *FD, 1);
if s.pr, s.pw, err = os.Pipe(); err != nil {
return nil, err
}
- if err = SetNonblock(s.pr.fd); err != nil {
+ if err = _SetNonblock(s.pr.fd); err != nil {
Error:
s.pr.Close();
s.pw.Close();
return nil, err
}
- if err = SetNonblock(s.pw.fd); err != nil {
+ if err = _SetNonblock(s.pw.fd); err != nil {
goto Error
}
if s.poll, err = NewPollster(); err != nil {
return s, nil
}
-func (s *PollServer) AddFD(fd *FD, mode int) {
+func (s *_PollServer) AddFD(fd *FD, mode int) {
if err := s.poll.AddFD(fd.fd, mode, false); err != nil {
- print("PollServer AddFD: ", err.String(), "\n");
+ print("_PollServer AddFD: ", err.String(), "\n");
return
}
s.pending[key] = fd
}
-func (s *PollServer) LookupFD(fd int64, mode int) *FD {
+func (s *_PollServer) LookupFD(fd int64, mode int) *FD {
key := fd << 1;
if mode == 'w' {
key++;
return netfd
}
-func (s *PollServer) Run() {
+func (s *_PollServer) Run() {
var scratch [100]byte;
for {
fd, mode, err := s.poll.WaitFD();
if err != nil {
- print("PollServer WaitFD: ", err.String(), "\n");
+ print("_PollServer WaitFD: ", err.String(), "\n");
return
}
if fd == s.pr.fd {
} else {
netfd := s.LookupFD(fd, mode);
if netfd == nil {
- print("PollServer: unexpected wakeup for fd=", netfd, " mode=", string(mode), "\n");
+ print("_PollServer: unexpected wakeup for fd=", netfd, " mode=", string(mode), "\n");
continue
}
if mode == 'r' {
}
}
-func (s *PollServer) Wakeup() {
+func (s *_PollServer) Wakeup() {
var b [1]byte;
s.pw.Write(b)
}
-func (s *PollServer) WaitRead(fd *FD) {
+func (s *_PollServer) WaitRead(fd *FD) {
s.cr <- fd;
s.Wakeup();
<-fd.cr
}
-func (s *PollServer) WaitWrite(fd *FD) {
+func (s *_PollServer) WaitWrite(fd *FD) {
s.cr <- fd;
s.Wakeup();
<-fd.cr
// Network FD methods.
-// All the network FDs use a single PollServer.
+// All the network FDs use a single _PollServer.
-var pollserver *PollServer
+var pollserver *_PollServer
-func StartServer() {
- p, err := NewPollServer();
+func _StartServer() {
+ p, err := _NewPollServer();
if err != nil {
- print("Start PollServer: ", err.String(), "\n")
+ print("Start _PollServer: ", err.String(), "\n")
}
pollserver = p
}
export func NewFD(fd int64) (f *FD, err *os.Error) {
if pollserver == nil {
- once.Do(&StartServer);
+ once.Do(&_StartServer);
}
- if err = SetNonblock(fd); err != nil {
+ if err = _SetNonblock(fd); err != nil {
return nil, err
}
f = new(FD);
)
// Make the 4 bytes into an IPv4 address (in IPv6 form)
-func MakeIPv4(a, b, c, d byte) []byte {
+func _MakeIPv4(a, b, c, d byte) []byte {
p := make([]byte, IPv6len);
for i := 0; i < 10; i++ {
p[i] = 0
export var IPv4bcast, IPv4allsys, IPv4allrouter, IPv4prefix, IPallbits, IPnoaddr []byte
func init() {
- IPv4bcast = MakeIPv4(0xff, 0xff, 0xff, 0xff);
- IPv4allsys = MakeIPv4(0xe0, 0x00, 0x00, 0x01);
- IPv4allrouter = MakeIPv4(0xe0, 0x00, 0x00, 0x02);
- IPv4prefix = MakeIPv4(0, 0, 0, 0);
+ IPv4bcast = _MakeIPv4(0xff, 0xff, 0xff, 0xff);
+ IPv4allsys = _MakeIPv4(0xe0, 0x00, 0x00, 0x01);
+ IPv4allrouter = _MakeIPv4(0xe0, 0x00, 0x00, 0x02);
+ IPv4prefix = _MakeIPv4(0, 0, 0, 0);
IPallbits = make([]byte, IPv6len);
for i := 0; i < IPv6len; i++ {
IPallbits[i] = 0xff
}
// Is p all zeros?
-func IsZeros(p []byte) bool {
+func _IsZeros(p []byte) bool {
for i := 0; i < len(p); i++ {
if p[i] != 0 {
return false
return p
}
if len(p) == IPv6len
- && IsZeros(p[0:10])
+ && _IsZeros(p[0:10])
&& p[10] == 0xff
&& p[11] == 0xff {
return p[12:16]
// Convert p to IPv6 form.
export func ToIPv6(p []byte) []byte {
if len(p) == IPv4len {
- return MakeIPv4(p[0], p[1], p[2], p[3])
+ return _MakeIPv4(p[0], p[1], p[2], p[3])
}
if len(p) == IPv6len {
return p
// Default route masks for IPv4.
export var (
- ClassAMask = MakeIPv4(0xff, 0, 0, 0);
- ClassBMask = MakeIPv4(0xff, 0xff, 0, 0);
- ClassCMask = MakeIPv4(0xff, 0xff, 0xff, 0);
+ ClassAMask = _MakeIPv4(0xff, 0, 0, 0);
+ ClassBMask = _MakeIPv4(0xff, 0xff, 0, 0);
+ ClassCMask = _MakeIPv4(0xff, 0xff, 0xff, 0);
)
export func DefaultMask(p []byte) []byte {
// If mask is a sequence of 1 bits followed by 0 bits,
// return the number of 1 bits.
-func SimpleMaskLength(mask []byte) int {
+func _SimpleMaskLength(mask []byte) int {
var i int;
for i = 0; i < len(mask); i++ {
if mask[i] != 0xFF {
export func MaskToString(mask []byte) string {
switch len(mask) {
case 4:
- n := SimpleMaskLength(mask);
+ n := _SimpleMaskLength(mask);
if n >= 0 {
return itod(uint(n+(IPv6len-IPv4len)*8))
}
case 16:
- n := SimpleMaskLength(mask);
+ n := _SimpleMaskLength(mask);
if n >= 0 {
return itod(uint(n))
}
}
// Parse IPv4 address (d.d.d.d).
-func ParseIPv4(s string) []byte {
+func _ParseIPv4(s string) []byte {
var p [IPv4len]byte;
i := 0;
for j := 0; j < IPv4len; j++ {
n int;
ok bool
)
- n, i, ok = Dtoi(s, i);
+ n, i, ok = _Dtoi(s, i);
if !ok || n > 0xFF {
return nil
}
if i != len(s) {
return nil
}
- return MakeIPv4(p[0], p[1], p[2], p[3])
+ return _MakeIPv4(p[0], p[1], p[2], p[3])
}
// Parse IPv6 address. Many forms.
// * A run of zeros can be replaced with "::".
// * The last 32 bits can be in IPv4 form.
// Thus, ::ffff:1.2.3.4 is the IPv4 address 1.2.3.4.
-func ParseIPv6(s string) []byte {
+func _ParseIPv6(s string) []byte {
p := make([]byte, 16);
ellipsis := -1; // position of ellipsis in p
i := 0; // index in string s
j := 0;
L: for j < IPv6len {
// Hex number.
- n, i1, ok := Xtoi(s, i);
+ n, i1, ok := _Xtoi(s, i);
if !ok || n > 0xFFFF {
return nil
}
// Not enough room.
return nil
}
- p4 := ParseIPv4(s[i:len(s)]);
+ p4 := _ParseIPv4(s[i:len(s)]);
if p4 == nil {
return nil
}
}
export func ParseIP(s string) []byte {
- p := ParseIPv4(s);
+ p := _ParseIPv4(s);
if p != nil {
return p
}
- return ParseIPv6(s)
+ return _ParseIPv6(s)
}
UnknownHost = os.NewError("unknown host");
DNS_Error = os.NewError("dns error looking up host");
UnknownPort = os.NewError("unknown port");
- UnknownSocketFamily = os.NewError("unknown socket family");
+ Unknown_SocketFamily = os.NewError("unknown socket family");
)
export func LookupHost(name string) (name1 string, addrs []string, err *os.Error)
// Split "host:port" into "host" and "port".
// Host cannot contain colons unless it is bracketed.
-func SplitHostPort(hostport string) (host, port string, err *os.Error) {
+func _SplitHostPort(hostport string) (host, port string, err *os.Error) {
// The port starts after the last colon.
var i int;
for i = len(hostport)-1; i >= 0; i-- {
host = host[1:len(host)-1]
} else {
// ... but if there are no brackets, no colons.
- if ByteIndex(host, ':') >= 0 {
+ if _ByteIndex(host, ':') >= 0 {
return "", "", BadAddress
}
}
// Join "host" and "port" into "host:port".
// If host contains colons, will join into "[host]:port".
-func JoinHostPort(host, port string) string {
+func _JoinHostPort(host, port string) string {
// If host has colons, have to bracket it.
- if ByteIndex(host, ':') >= 0 {
+ if _ByteIndex(host, ':') >= 0 {
return "[" + host + "]:" + port
}
return host + ":" + port
// Convert "host:port" into IP address and port.
// For now, host and port must be numeric literals.
// Eventually, we'll have name resolution.
-func HostPortToIP(net, hostport, mode string) (ip []byte, iport int, err *os.Error) {
+func _HostPortToIP(net, hostport, mode string) (ip []byte, iport int, err *os.Error) {
var host, port string;
- host, port, err = SplitHostPort(hostport);
+ host, port, err = _SplitHostPort(hostport);
if err != nil {
return nil, 0, err
}
}
}
- p, i, ok := Dtoi(port, 0);
+ p, i, ok := _Dtoi(port, 0);
if !ok || i != len(port) {
p, ok = LookupPort(net, port);
if !ok {
}
// Convert socket address into "host:port".
-func SockaddrToHostPort(sa *syscall.Sockaddr) (hostport string, err *os.Error) {
+func _SockaddrToHostPort(sa *syscall.Sockaddr) (hostport string, err *os.Error) {
switch sa.family {
case syscall.AF_INET, syscall.AF_INET6:
addr, port, e := SockaddrToIP(sa);
return "", e
}
host := IPToString(addr);
- return JoinHostPort(host, strconv.Itoa(port)), nil;
+ return _JoinHostPort(host, strconv.Itoa(port)), nil;
default:
- return "", UnknownSocketFamily
+ return "", Unknown_SocketFamily
}
return "", nil // not reached
}
return 0
}
-// Generic Socket creation.
-func Socket(f, p, t int64, la, ra *syscall.Sockaddr) (fd *FD, err *os.Error) {
+// Generic _Socket creation.
+func _Socket(f, p, t int64, la, ra *syscall.Sockaddr) (fd *FD, err *os.Error) {
s, e := syscall.socket(f, p, t);
if e != 0 {
return nil, os.ErrnoToError(e)
// Generic implementation of Conn interface; not exported.
-type ConnBase struct {
+type _ConnBase struct {
fd *FD;
raddr string;
}
-func (c *ConnBase) FD() int64 {
+func (c *_ConnBase) FD() int64 {
if c == nil || c.fd == nil {
return -1
}
return c.fd.fd
}
-func (c *ConnBase) Read(b []byte) (n int, err *os.Error) {
+func (c *_ConnBase) Read(b []byte) (n int, err *os.Error) {
n, err = c.fd.Read(b);
return n, err
}
-func (c *ConnBase) Write(b []byte) (n int, err *os.Error) {
+func (c *_ConnBase) Write(b []byte) (n int, err *os.Error) {
n, err = c.fd.Write(b);
return n, err
}
-func (c *ConnBase) ReadFrom(b []byte) (n int, raddr string, err *os.Error) {
+func (c *_ConnBase) ReadFrom(b []byte) (n int, raddr string, err *os.Error) {
if c == nil {
return -1, "", os.EINVAL
}
return n, c.raddr, err
}
-func (c *ConnBase) WriteTo(raddr string, b []byte) (n int, err *os.Error) {
+func (c *_ConnBase) WriteTo(raddr string, b []byte) (n int, err *os.Error) {
if c == nil {
return -1, os.EINVAL
}
return n, err
}
-func (c *ConnBase) Close() *os.Error {
+func (c *_ConnBase) Close() *os.Error {
if c == nil {
return os.EINVAL
}
return os.ErrnoToError(syscall.setsockopt_tv(fd, level, opt, nsec));
}
-func (c *ConnBase) SetReadBuffer(bytes int) *os.Error {
+func (c *_ConnBase) SetReadBuffer(bytes int) *os.Error {
return setsockopt_int(c.FD(), syscall.SOL_SOCKET, syscall.SO_RCVBUF, bytes);
}
-func (c *ConnBase) SetWriteBuffer(bytes int) *os.Error {
+func (c *_ConnBase) SetWriteBuffer(bytes int) *os.Error {
return setsockopt_int(c.FD(), syscall.SOL_SOCKET, syscall.SO_SNDBUF, bytes);
}
-func (c *ConnBase) SetReadTimeout(nsec int64) *os.Error {
+func (c *_ConnBase) SetReadTimeout(nsec int64) *os.Error {
return setsockopt_tv(c.FD(), syscall.SOL_SOCKET, syscall.SO_RCVTIMEO, nsec);
}
-func (c *ConnBase) SetWriteTimeout(nsec int64) *os.Error {
+func (c *_ConnBase) SetWriteTimeout(nsec int64) *os.Error {
return setsockopt_tv(c.FD(), syscall.SOL_SOCKET, syscall.SO_SNDTIMEO, nsec);
}
-func (c *ConnBase) SetTimeout(nsec int64) *os.Error {
+func (c *_ConnBase) SetTimeout(nsec int64) *os.Error {
if e := c.SetReadTimeout(nsec); e != nil {
return e
}
return c.SetWriteTimeout(nsec)
}
-func (c *ConnBase) SetReuseAddr(reuse bool) *os.Error {
+func (c *_ConnBase) SetReuseAddr(reuse bool) *os.Error {
return setsockopt_int(c.FD(), syscall.SOL_SOCKET, syscall.SO_REUSEADDR, boolint(reuse));
}
-func (c *ConnBase) BindToDevice(dev string) *os.Error {
+func (c *_ConnBase) BindToDevice(dev string) *os.Error {
// TODO: call setsockopt with null-terminated string pointer
return os.EINVAL
}
-func (c *ConnBase) SetDontRoute(dontroute bool) *os.Error {
+func (c *_ConnBase) SetDontRoute(dontroute bool) *os.Error {
return setsockopt_int(c.FD(), syscall.SOL_SOCKET, syscall.SO_DONTROUTE, boolint(dontroute));
}
-func (c *ConnBase) SetKeepAlive(keepalive bool) *os.Error {
+func (c *_ConnBase) SetKeepAlive(keepalive bool) *os.Error {
return setsockopt_int(c.FD(), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, boolint(keepalive));
}
-func (c *ConnBase) SetLinger(sec int) *os.Error {
+func (c *_ConnBase) SetLinger(sec int) *os.Error {
e := syscall.setsockopt_linger(c.FD(), syscall.SOL_SOCKET, syscall.SO_LINGER, sec);
return os.ErrnoToError(e);
}
// understands IPv6, it's okay to pass IPv4 addresses to the IPv6
// interface. That simplifies our code and is most general.
// If we need to build on a system without IPv6 support, setting
-// PreferIPv4 here should fall back to the IPv4 socket interface when possible.
-const PreferIPv4 = false
+// _PreferIPv4 here should fall back to the IPv4 socket interface when possible.
+const _PreferIPv4 = false
-func InternetSocket(net, laddr, raddr string, proto int64, mode string) (fd *FD, err *os.Error) {
+func _InternetSocket(net, laddr, raddr string, proto int64, mode string) (fd *FD, err *os.Error) {
// Parse addresses (unless they are empty).
var lip, rip []byte;
var lport, rport int;
var lerr, rerr *os.Error;
if laddr != "" {
- lip, lport, lerr = HostPortToIP(net, laddr, mode);
+ lip, lport, lerr = _HostPortToIP(net, laddr, mode);
if lerr != nil {
return nil, lerr
}
}
if raddr != "" {
- rip, rport, rerr = HostPortToIP(net, raddr, mode);
+ rip, rport, rerr = _HostPortToIP(net, raddr, mode);
if rerr != nil {
return nil, rerr
}
default:
// Otherwise, guess.
// If the addresses are IPv4 and we prefer IPv4, use 4; else 6.
- if PreferIPv4 && ToIPv4(lip) != nil && ToIPv4(rip) != nil {
+ if _PreferIPv4 && ToIPv4(lip) != nil && ToIPv4(rip) != nil {
vers = 4
} else {
vers = 6
}
}
- fd, err = Socket(family, proto, 0, la, ra);
+ fd, err = _Socket(family, proto, 0, la, ra);
return fd, err
}
// TCP connections.
export type ConnTCP struct {
- ConnBase
+ _ConnBase
}
func (c *ConnTCP) SetNoDelay(nodelay bool) *os.Error {
return setsockopt_int(c.FD(), syscall.IPPROTO_TCP, syscall.TCP_NODELAY, boolint(nodelay))
}
-func NewConnTCP(fd *FD, raddr string) *ConnTCP {
+func _NewConnTCP(fd *FD, raddr string) *ConnTCP {
c := new(ConnTCP);
c.fd = fd;
c.raddr = raddr;
if raddr == "" {
return nil, MissingAddress
}
- fd, e := InternetSocket(net, laddr, raddr, syscall.SOCK_STREAM, "dial");
+ fd, e := _InternetSocket(net, laddr, raddr, syscall.SOCK_STREAM, "dial");
if e != nil {
return nil, e
}
- return NewConnTCP(fd, raddr), nil
+ return _NewConnTCP(fd, raddr), nil
}
// TODO(rsc): UDP headers mode
export type ConnUDP struct {
- ConnBase
+ _ConnBase
}
-func NewConnUDP(fd *FD, raddr string) *ConnUDP {
+func _NewConnUDP(fd *FD, raddr string) *ConnUDP {
c := new(ConnUDP);
c.fd = fd;
c.raddr = raddr;
if raddr == "" {
return nil, MissingAddress
}
- fd, e := InternetSocket(net, laddr, raddr, syscall.SOCK_DGRAM, "dial");
+ fd, e := _InternetSocket(net, laddr, raddr, syscall.SOCK_DGRAM, "dial");
if e != nil {
return nil, e
}
- return NewConnUDP(fd, raddr), nil
+ return _NewConnUDP(fd, raddr), nil
}
}
export func ListenTCP(net, laddr string) (l *ListenerTCP, err *os.Error) {
- fd, e := InternetSocket(net, laddr, "", syscall.SOCK_STREAM, "listen");
+ fd, e := _InternetSocket(net, laddr, "", syscall.SOCK_STREAM, "listen");
if e != nil {
return nil, e
}
if e != nil {
return nil, "", e
}
- raddr, err = SockaddrToHostPort(&sa);
+ raddr, err = _SockaddrToHostPort(&sa);
if err != nil {
fd.Close();
return nil, "", err
}
- return NewConnTCP(fd, raddr), raddr, nil
+ return _NewConnTCP(fd, raddr), raddr, nil
}
func (l *ListenerTCP) Accept() (c Conn, raddr string, err *os.Error) {
"os";
)
-package type File struct {
+type _File struct {
fd *os.FD;
data []byte;
}
-func (f *File) Close() {
+func (f *_File) Close() {
f.fd.Close()
}
-func (f *File) GetLineFromData() (s string, ok bool) {
+func (f *_File) GetLineFromData() (s string, ok bool) {
data := f.data;
for i := 0; i < len(data); i++ {
if data[i] == '\n' {
return
}
-func (f *File) ReadLine() (s string, ok bool) {
+func (f *_File) ReadLine() (s string, ok bool) {
if s, ok = f.GetLineFromData(); ok {
return
}
return
}
-package func Open(name string) *File {
+func _Open(name string) *_File {
fd, err := os.Open(name, os.O_RDONLY, 0);
if err != nil {
return nil
}
- return &File{fd, make([]byte, 1024)[0:0]};
+ return &_File{fd, make([]byte, 1024)[0:0]};
}
-package func ByteIndex(s string, c byte) int {
+func _ByteIndex(s string, c byte) int {
for i := 0; i < len(s); i++ {
if s[i] == c {
return i
}
// Count occurrences in s of any bytes in t.
-package func CountAnyByte(s string, t string) int {
+func _CountAnyByte(s string, t string) int {
n := 0;
for i := 0; i < len(s); i++ {
- if ByteIndex(t, s[i]) >= 0 {
+ if _ByteIndex(t, s[i]) >= 0 {
n++;
}
}
}
// Split s at any bytes in t.
-package func SplitAtBytes(s string, t string) []string {
- a := make([]string, 1+CountAnyByte(s, t));
+func _SplitAtBytes(s string, t string) []string {
+ a := make([]string, 1+_CountAnyByte(s, t));
n := 0;
last := 0;
for i := 0; i < len(s); i++ {
- if ByteIndex(t, s[i]) >= 0 {
+ if _ByteIndex(t, s[i]) >= 0 {
if last < i {
a[n] = string(s[last:i]);
n++;
return a[0:n];
}
-package func GetFields(s string) []string {
- return SplitAtBytes(s, " \r\t\n");
+func _GetFields(s string) []string {
+ return _SplitAtBytes(s, " \r\t\n");
}
// Bigger than we need, not too big to worry about overflow
-const Big = 0xFFFFFF
+const _Big = 0xFFFFFF
// Decimal to integer starting at &s[i0].
// Returns number, new offset, success.
-package func Dtoi(s string, i0 int) (n int, i int, ok bool) {
+func _Dtoi(s string, i0 int) (n int, i int, ok bool) {
n = 0;
for i = i0; i < len(s) && '0' <= s[i] && s[i] <= '9'; i++ {
n = n*10 + int(s[i] - '0');
- if n >= Big {
+ if n >= _Big {
return 0, i, false
}
}
// Hexadecimal to integer starting at &s[i0].
// Returns number, new offset, success.
-package func Xtoi(s string, i0 int) (n int, i int, ok bool) {
+func _Xtoi(s string, i0 int) (n int, i int, ok bool) {
n = 0;
for i = i0; i < len(s); i++ {
if '0' <= s[i] && s[i] <= '9' {
} else {
break
}
- if n >= Big {
+ if n >= _Big {
return 0, i, false
}
}
export func TestReadLine(t *testing.T) {
filename := "/etc/services"; // a nice big file
- fd, err := os.Open(filename, os.O_RDONLY, 0);
+ fd, err := os._Open(filename, os.O_RDONLY, 0);
if err != nil {
t.Fatalf("open %s: %v", filename, err);
}
t.Fatalf("bufio.NewBufRead: %v", err1);
}
- file := Open(filename);
+ file := _Open(filename);
if file == nil {
- t.Fatalf("net.Open(%s) = nil", filename);
+ t.Fatalf("net._Open(%s) = nil", filename);
}
lineno := 1;
var services map[string] map[string] int
-func ReadServices() {
+func _ReadServices() {
services = make(map[string] map[string] int);
- file := Open("/etc/services");
+ file := _Open("/etc/services");
for line, ok := file.ReadLine(); ok; line, ok = file.ReadLine() {
// "http 80/tcp www www-http # World Wide Web HTTP"
- if i := ByteIndex(line, '#'); i >= 0 {
+ if i := _ByteIndex(line, '#'); i >= 0 {
line = line[0:i];
}
- f := GetFields(line);
+ f := _GetFields(line);
if len(f) < 2 {
continue;
}
portnet := f[1]; // "tcp/80"
- port, j, ok := Dtoi(portnet, 0);
+ port, j, ok := _Dtoi(portnet, 0);
if !ok || port <= 0 || j >= len(portnet) || portnet[j] != '/' {
continue
}
}
export func LookupPort(netw, name string) (port int, ok bool) {
- once.Do(&ReadServices);
+ once.Do(&_ReadServices);
switch netw {
case "tcp4", "tcp6":