Interprocess kominukace Unix x W95

[Jan Matejka]

Jindrich Kubec wrote in message <36A49060.75E2E71D na asw.cz>...
>Dobrej!
>
>Pro zacatek - pouzivam ActiveState Perl pro W95. Je jedno proc. :)
>
>Potrebuju si napsat CGI, ktery bude pracovat s nejakou databazi.
>Protoze neumim (a nemam cas se ucit) pracovat s nejakyma
>sofistikovanyma, pouziju nejaky svuj Perlovy engine. Protoze ale bych to
>musel pokazde natahovat do pameti a to by bylo zcela jiste pomaly, chci
>to udelat tak, aby jeden program sedel v pameti furt (server) a to CGI
>by bylo jen klient. Pri zadani do formu by se CGI dotazalo serveru, ten
>by mu vratil vysledek.
>
>Podminka je, ze to musi bezet i na Unixu i na W95.
>
>Pod W95 to tim padem nemuze byt "multithreadove". Neni tam fork, jak to
>udelat jinak nevim.
>
>Jak maji mezi sebou komunikovat? Pouzil jsem sockety.
>
>Problem ale mam, jakmile mi spadne server, ten pitomej klient udela
>nejakou neznamou chybu.
>
>Co by mela na Unixu vratit funkce connect na port, kde nikdo neodpovida?
>Pod W95 to vraci Unknown error.
>
>Na Unixu to ted nemam moznost odzkouset.
>
>Diky za kazdou dobrou radu,
>--
>Jindrich Kubec <kubecj na asw.cz>
>For Atari utils check http://www.asw.cz/~kubecj

Na W9x a NT vraci Perl standardni Microsoftske chybove kody, ktere jsou
zcela odlisne od Unixovych.
Jejich seznam prikladam ze souboru WSAPI22.DOC, ktery se da najit (sockets
2.x) na

ftp://ftp.microsoft.com//bussys/WinSock/winsock2

resp. verze 1.1

ftp://ftp.microsoft.com//bussys/WinSock/spec11


A.1.2 Error Codes - Extended Description
The following is a list of possible error codes returned by the
WSAGetLastError() call, along with their extended explanations.  Errors are
listed in alphabetical order by error macro.  Some error codes defined in
WINSOCK2.H are not returned from any function - these have not been listed
here.
WSAEACCES (10013) Permission denied.
An attempt was made to access a socket in a way forbidden by its access
permissions. An example is using a broadcast address for sendto() without
broadcast permission being set using setsockopt(SO_BROADCAST).

WSAEADDRINUSE  (10048)  Address already in use.
Only one usage of each socket address (protocol/IP address/port) is normally
permitted. This error  occurs if an application attempts to bind() a socket
to an IP address/port that has already been used for an existing socket, or
a socket that wasn't closed properly, or one that is still in the process of
closing. For server applications that need to bind() multiple sockets to the
same port number, consider using setsockopt(SO_REUSEADDR). Client
applications usually need not call bind() at all - connect() will choose an
unused port automatically.

WSAEADDRNOTAVAIL  (10049)  Cannot assign requested address.
The requested address is not valid in its context. Normally results from an
attempt to bind() to an address that is not valid for the local machine, or
connect()/sendto() an address or port that is not valid for a remote machine
(e.g. port 0).

WSAEAFNOSUPPORT (10047)  Address family not supported by protocol family.
An address incompatible with the requested protocol was used. All sockets
are created with an associated "address family" (i.e. AF_INET for Internet
Protocols) and a generic protocol type (i.e. SOCK_STREAM). This error will
be returned if an incorrect protocol is explicitly requested in the socket()
call, or if an address of the wrong family is used for a socket, e.g. in
sendto().

WSAEALREADY  (10037) Operation already in progress.
An operation was attempted on a non-blocking socket that already had an
operation in progress - i.e. calling connect() a second time on a
non-blocking socket that is already connecting, or canceling an asynchronous
request (WSAAsyncGetXbyY()) that has already been canceled or completed.
WSAECONNABORTED (10053)  Software caused connection abort.
An established connection was aborted by the software in your host machine,
possibly due to a data transmission timeout or protocol error.

WSAECONNREFUSED (10061)  Connection refused.
No connection could be made because the target machine actively refused it.
This usually results from trying to connect to a service that is inactive on
the foreign host - i.e. one with no server application running.

WSAECONNRESET (10054)  Connection reset by peer.
A existing connection was forcibly closed by the remote host. This normally
results if the peer application on the remote host is suddenly stopped, the
host is rebooted, or the remote host used a "hard close" (see
setsockopt(SO_LINGER)) on the remote socket.

WSAEDESTADDRREQ  (10039)  Destination address required.
A required address was omitted from an operation on a socket. For example,
this error will be returned if sendto() is called with the remote address of
ADDR_ANY.

WSAEFAULT (10014)  Bad address.
The system detected an invalid pointer address in attempting to use a
pointer argument of a call.  This error occurs if an application passes an
invalid pointer value, or if the length of the buffer is too small.  For
instance, if the length of an argument which is a struct sockaddr is smaller
than sizeof(struct sockaddr).

WSAEHOSTDOWN (10064)  Host is down.
A socket operation failed because the destination host was down.  A socket
operation encountered a dead host.  Networking activity on the local host
has not been initiated. These conditions are more likely to be indicated by
the error WSAETIMEDOUT.

WSAEHOSTUNREACH (10065)  No route to host.
A socket operation was attempted to an unreachable host. See WSAENETUNREACH

WSAEINPROGRESS  (10036) Operation now in progress.
A blocking operation is currently executing. Windows Sockets only allows a
single blocking operation to be outstanding per task (or thread), and if any
other function call is made  (whether or not it references that or any other
socket) the function fails with the WSAEINPROGRESS error.

WSAEINTR  (10004)  Interrupted function call.
A blocking operation was interrupted by a call to WSACancelBlockingCall().

WSAEINVAL (10022)  Invalid argument.
Some invalid argument was supplied (for example, specifying an invalid level
to the setsockopt() function). In some instances, it also refers to the
current state of the socket - for instance, calling accept() on a socket
that is not listen()ing.

WSAEISCONN (10056)  Socket is already connected.
A connect request was made on an already connected socket. Some
implementations also return this error if sendto() is called on a connected
SOCK_DGRAM socket (For SOCK_STREAM sockets, the to parameter in sendto() is
ignored), although other implementations treat this as a legal occurrence.

WSAEMFILE  (10024)  Too many open files.
Too many open sockets. Each implementation may have a maximum number of
socket handles available, either globally, per process or per thread.

WSAEMSGSIZE  (10040) Message too long.
A message sent on a datagram socket was larger than the internal message
buffer or some other network limit, or the buffer used to receive a datagram
into was smaller than the datagram itself.

WSAENETDOWN (10050)  Network is down.
A socket operation encountered a dead network. This could indicate a serious
failure of the network system (i.e. the protocol stack that the WinSock DLL
runs over), the network interface, or the local network itself.

WSAENETRESET (10052)  Network dropped connection on reset.
The host you were connected to crashed and rebooted. May also be returned by
setsockopt() if an attempt is made to set SO_KEEPALIVE on a connection that
has already failed.

WSAENETUNREACH (10051)  Network is unreachable.
A socket operation was attempted to an unreachable network. This usually
means the local software knows no route to reach the remote host.

WSAENOBUFS (10055)  No buffer space available.
An operation on a socket could not be performed because the system lacked
sufficient buffer space or because a queue was full.

WSAENOPROTOOPT (10042)  Bad protocol option.
An unknown, invalid or unsupported option or level was specified in a
getsockopt() or setsockopt() call.

WSAENOTCONN  (10057)  Socket is not connected.
A request to send or receive data was disallowed because the socket is not
connected and (when sending on a datagram socket using sendto()) no address
was supplied. Any other type of operation might also return this error - for
example, setsockopt() setting SO_KEEPALIVE if the connection has been reset.

WSAENOTSOCK  (10038) Socket operation on non-socket.
An operation was attempted on something that is not a socket. Either the
socket handle parameter did not reference a valid socket, or for select(), a
member of  an fd_set was not valid.

WSAEOPNOTSUPP  (10045)  Operation not supported.
The attempted operation is not supported for the type of object referenced.
Usually this occurs when a socket descriptor to a socket that cannot support
this operation, for example, trying to accept a connection on a datagram
socket.

WSAEPFNOSUPPORT  (10046)  Protocol family not supported.
The protocol family has not been configured into the system or no
implementation for it exists. Has a slightly different meaning to
WSAEAFNOSUPPORT, but is interchangeable in most cases, and all Windows
Sockets functions that return one of these specify WSAEAFNOSUPPORT.

WSAEPROCLIM (10067)  Too many processes.
A Windows Sockets implementation may have a limit on the number of
applications that may use it simultaneously. WSAStartup() may fail with this
error if the limit has been reached.

WSAEPROTONOSUPPORT (10043)  Protocol not supported.
The requested protocol has not been configured into the system, or no
implementation for it exists. For example, a socket() call requests a
SOCK_DGRAM socket, but specifies a stream protocol.

WSAEPROTOTYPE  (10041)  Protocol wrong type for socket.
A protocol was specified in the socket() function call that does not support
the semantics of the socket type requested.  For example,  the ARPA Internet
UDP protocol cannot be specified with a socket type of SOCK_STREAM.

WSAESHUTDOWN (10058)  Cannot send after socket shutdown.
A request to send or receive data was disallowed because the socket had
already been shut down in that direction with a previous shutdown() call. By
calling shutdown() a  partial close of a socket is requested, which is a
signal that sending or receiving or both has been discontinued.

WSAESOCKTNOSUPPORT  (10044)  Socket type not supported.
The support for the specified socket type does not exist in this address
family. For example, the optional type SOCK_RAW might be selected in a
socket() call, and the implementation does not support SOCK_RAW sockets at
all.

WSAETIMEDOUT (10060)  Connection timed out.
A connection attempt failed because the connected party did not properly
respond after a period of time, or established connection failed because
connected host has failed to respond.

WSAEWOULDBLOCK  (10035)  Resource temporarily unavailable.
This error is returned from operations on non-blocking sockets that cannot
be completed immediately, for example recv() when no data is queued to be
read from the socket. It is a non-fatal error, and the operation should be
retried later. It is normal for WSAEWOULDBLOCK to be reported as the result
from calling connect() on a non-blocking SOCK_STREAM socket, since some time
must elapse for the connection to be established.

WSAHOST_NOT_FOUND (11001) Host not found.
No such host is known.  The name is not an official hostname or alias, or it
cannot be found in the database(s) being queried. This error may also be
returned for protocol and service queries, and means the specified name
could not be found in the relevant database.

WSA_INVALID_HANDLE (OS dependent) Specified event object handle is invalid.
An application attempts to use an event object, but the specified handle is
not valid.

WSA_INVALID_PARAMETER (OS dependent) One or more parameters are invalid.
An application used a WinSock function which directly maps to a Win32
function.  The Win32 function is indicating a problem with one or more
parameters.

WSAINVALIDPROCTABLE (OS dependent)  Invalid procedure table from service
provider.
A service provider returned a bogus proc table to WS2_32.DLL.  (Usually
caused by one or more of the function pointers being NULL.)

WSAINVALIDPROVIDER (OS dependent)  Invalid service provider version number.
A service provider returned a version number other than 2.0. WSA_IO_PENDING
(OS dependent) Overlapped operations will complete later.
The application has initiated an overlapped operation which cannot be
completed immediately.  A completion indication will be given at a later
time when the operation has been completed.

WSA_IO_INCOMPLETE (OS dependent) Overlapped I/O event object not in signaled
state.
The application has tried to determine the status of an overlapped operation
which is not yet completed.  Applications that use
WSAWaitForMultipleEvents() in a polling mode to determine when an overlapped
operation has completed will get this error code until the operation is
complete.

WSA_NOT_ENOUGH_MEMORY  (OS dependent) Insufficient memory available.
An application used a WinSock function which directly maps to a Win32
function.  The Win32 function is indicating a lack of required memory
resources.

WSANOTINITIALISED (10093)  Successful WSAStartup() not yet performed.
Either the application hasn稚 called WSAStartup(), or WSAStartup() failed.
The application may be accessing a socket which the current active task does
not own (i.e. trying to share a socket between tasks), or WSACleanup() has
been called too many times.

WSANO_DATA (11004)  Valid name, no data record of requested type.
The requested name is valid and was found in the database, but it does not
have the correct associated data being resolved for. The usual example for
this is a hostname -> address translation attempt (using gethostbyname() or
WSAAsyncGetHostByName()) which uses the DNS (Domain Name Server), and an MX
record is returned but no A record - indicating the host itself exists, but
is not directly reachable.

WSANO_RECOVERY (11003)  This is a non-recoverable error.
This indicates some sort of non-recoverable error occurred during a database
lookup. This may be because the database files (e.g. BSD-compatible HOSTS,
SERVICES or PROTOCOLS files) could not be found, or a DNS request was
returned by the server with a severe error.

WSAPROVIDERFAILEDINIT (OS dependent)  Unable to initialize a service
provider.
Either a service provider's DLL could not be loaded (LoadLibrary() failed)
or the provider's WSPStartup/NSPStartup function failed.

WSASYSCALLFAILURE (OS dependent)  System call failure..
Returned when a system call that should never fail does. For example, if a
call to WaitForMultipleObjects() fails or one of the registry APIs fails
trying to manipulate the
protocol/namespace catalogs.

WSASYSNOTREADY (10091)  Network subsystem is unavailable.
This error is returned by WSAStartup() if the Windows Sockets implementation
cannot function at this time because the underlying system it uses to
provide network services is currently unavailable. Users should check:
* that the appropriate  Windows SocketsDLL file is in the current path,
* * that they are not trying to use more than one WinSock implementation
simultaneously.  If there is  more than one WINSOCK DLL on your system, be
sure the first one in the path is appropriate for the network subsystem
currently loaded.
* the WinSock implementation documentation to be sure all necessary
components are currently installed and configured correctly.

WSATRY_AGAIN (11002)  Non-authoritative host not found.
This is usually a temporary error during hostname resolution and means that
the local server did not receive a response from an authoritative server.  A
retry at some time later may be successful.

WSAVERNOTSUPPORTED (10092)  WINSOCK.DLL version out of range.
The current WinSock implementation does not support the Windows Sockets
specification version requested by the application. Check that no old
Windows SocketsDLL files are being accessed.

WSAEDISCON (10094)  Graceful shutdown in progress.
Returned by recv(), WSARecv() to indicate the remote party has initiated a
graceful shutdown sequence.

WSA_OPERATION_ABORTED   (OS dependent) Overlapped operation aborted.
An overlapped operation was canceled due to the closure of the socket, or
the execution of the SIO_FLUSH command in WSAIoctl()