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|
/*
* src/interfaces/libpq/win32.c
*
*
* FILE
* win32.c
*
* DESCRIPTION
* Win32 support functions.
*
* Contains table and functions for looking up win32 socket error
* descriptions. But will/may contain other win32 helper functions
* for libpq.
*
* The error constants are taken from the Frambak Bakfram LGSOCKET
* library guys who in turn took them from the Winsock FAQ.
*
* Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*/
/* Make stuff compile faster by excluding not used stuff */
#define VC_EXTRALEAN
#ifndef __MINGW32__
#define NOGDI
#endif
#define NOCRYPT
#include "postgres_fe.h"
#include "win32.h"
/* Declared here to avoid pulling in all includes, which causes name collisions */
#ifdef ENABLE_NLS
extern char *libpq_gettext(const char *msgid) pg_attribute_format_arg(1);
#else
#define libpq_gettext(x) (x)
#endif
static struct WSErrorEntry
{
DWORD error;
const char *description;
} WSErrors[] =
{
{
0, "No error"
},
{
WSAEINTR, "Interrupted system call"
},
{
WSAEBADF, "Bad file number"
},
{
WSAEACCES, "Permission denied"
},
{
WSAEFAULT, "Bad address"
},
{
WSAEINVAL, "Invalid argument"
},
{
WSAEMFILE, "Too many open sockets"
},
{
WSAEWOULDBLOCK, "Operation would block"
},
{
WSAEINPROGRESS, "Operation now in progress"
},
{
WSAEALREADY, "Operation already in progress"
},
{
WSAENOTSOCK, "Socket operation on non-socket"
},
{
WSAEDESTADDRREQ, "Destination address required"
},
{
WSAEMSGSIZE, "Message too long"
},
{
WSAEPROTOTYPE, "Protocol wrong type for socket"
},
{
WSAENOPROTOOPT, "Bad protocol option"
},
{
WSAEPROTONOSUPPORT, "Protocol not supported"
},
{
WSAESOCKTNOSUPPORT, "Socket type not supported"
},
{
WSAEOPNOTSUPP, "Operation not supported on socket"
},
{
WSAEPFNOSUPPORT, "Protocol family not supported"
},
{
WSAEAFNOSUPPORT, "Address family not supported"
},
{
WSAEADDRINUSE, "Address already in use"
},
{
WSAEADDRNOTAVAIL, "Cannot assign requested address"
},
{
WSAENETDOWN, "Network is down"
},
{
WSAENETUNREACH, "Network is unreachable"
},
{
WSAENETRESET, "Net connection reset"
},
{
WSAECONNABORTED, "Software caused connection abort"
},
{
WSAECONNRESET, "Connection reset by peer"
},
{
WSAENOBUFS, "No buffer space available"
},
{
WSAEISCONN, "Socket is already connected"
},
{
WSAENOTCONN, "Socket is not connected"
},
{
WSAESHUTDOWN, "Cannot send after socket shutdown"
},
{
WSAETOOMANYREFS, "Too many references, cannot splice"
},
{
WSAETIMEDOUT, "Connection timed out"
},
{
WSAECONNREFUSED, "Connection refused"
},
{
WSAELOOP, "Too many levels of symbolic links"
},
{
WSAENAMETOOLONG, "File name too long"
},
{
WSAEHOSTDOWN, "Host is down"
},
{
WSAEHOSTUNREACH, "No route to host"
},
{
WSAENOTEMPTY, "Directory not empty"
},
{
WSAEPROCLIM, "Too many processes"
},
{
WSAEUSERS, "Too many users"
},
{
WSAEDQUOT, "Disc quota exceeded"
},
{
WSAESTALE, "Stale NFS file handle"
},
{
WSAEREMOTE, "Too many levels of remote in path"
},
{
WSASYSNOTREADY, "Network system is unavailable"
},
{
WSAVERNOTSUPPORTED, "Winsock version out of range"
},
{
WSANOTINITIALISED, "WSAStartup not yet called"
},
{
WSAEDISCON, "Graceful shutdown in progress"
},
{
WSAHOST_NOT_FOUND, "Host not found"
},
{
WSATRY_AGAIN, "NA Host not found / SERVFAIL"
},
{
WSANO_RECOVERY, "Non recoverable FORMERR||REFUSED||NOTIMP"
},
{
WSANO_DATA, "No host data of that type was found"
},
{
0, 0
} /* End of table */
};
/*
* Returns 0 if not found, linear but who cares, at this moment
* we're already in pain :)
*/
static int
LookupWSErrorMessage(DWORD err, char *dest)
{
struct WSErrorEntry *e;
for (e = WSErrors; e->description; e++)
{
if (e->error == err)
{
strcpy(dest, e->description);
return 1;
}
}
return 0;
}
struct MessageDLL
{
const char *dll_name;
void *handle;
int loaded; /* BOOL */
} dlls[] =
{
{
"netmsg.dll", 0, 0
},
{
"winsock.dll", 0, 0
},
{
"ws2_32.dll", 0, 0
},
{
"wsock32n.dll", 0, 0
},
{
"mswsock.dll", 0, 0
},
{
"ws2help.dll", 0, 0
},
{
"ws2thk.dll", 0, 0
},
{
0, 0, 1
} /* Last one, no dll, always loaded */
};
#define DLLS_SIZE (sizeof(dlls)/sizeof(struct MessageDLL))
/*
* Returns a description of the socket error by first trying
* to find it in the lookup table, and if that fails, tries
* to load any of the winsock dlls to find that message.
* The DLL thing works from Nt4 (spX ?) up, but some special
* versions of winsock might have this as well (seen on Win98 SE
* special install) / Magnus Naeslund (mag@fbab.net)
*
*/
const char *
winsock_strerror(int err, char *strerrbuf, size_t buflen)
{
unsigned long flags;
int offs,
i;
int success = LookupWSErrorMessage(err, strerrbuf);
for (i = 0; !success && i < DLLS_SIZE; i++)
{
if (!dlls[i].loaded)
{
dlls[i].loaded = 1; /* Only load once */
dlls[i].handle = (void *) LoadLibraryEx(dlls[i].dll_name,
0,
LOAD_LIBRARY_AS_DATAFILE);
}
if (dlls[i].dll_name && !dlls[i].handle)
continue; /* Didn't load */
flags = FORMAT_MESSAGE_FROM_SYSTEM
| FORMAT_MESSAGE_IGNORE_INSERTS
| (dlls[i].handle ? FORMAT_MESSAGE_FROM_HMODULE : 0);
success = 0 != FormatMessage(flags,
dlls[i].handle, err,
MAKELANGID(LANG_ENGLISH, SUBLANG_DEFAULT),
strerrbuf, buflen - 64,
0);
}
if (!success)
sprintf(strerrbuf, libpq_gettext("unrecognized socket error: 0x%08X/%d"), err, err);
else
{
strerrbuf[buflen - 1] = '\0';
offs = strlen(strerrbuf);
if (offs > (int) buflen - 64)
offs = buflen - 64;
sprintf(strerrbuf + offs, " (0x%08X/%d)", err, err);
}
return strerrbuf;
}
|