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load ws2_32.dll dynamically in wxGetFullHostName()

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@22327 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2003-07-28 00:18:10 +00:00
parent e9877ed3a8
commit 15cdcf6a0e
1 changed files with 61 additions and 32 deletions
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63
src/msw/utils.cpp
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@@ -32,6 +32,7 @@
#endif //WX_PRECOMP
#include "wx/apptrait.h"
#include "wx/dynload.h"
#include "wx/msw/private.h" // includes <windows.h>
#include "wx/msw/missing.h" // CHARSET_HANGUL
@@ -143,30 +144,56 @@ bool wxGetHostName(wxChar *buf, int maxSize)
// get full hostname (with domain name if possible)
bool wxGetFullHostName(wxChar *buf, int maxSize)
{
#if defined(__WIN32__) && !defined(__WXMICROWIN__) && ! (defined(__GNUWIN32__) && !defined(__MINGW32__))
#ifndef __WXMICROWIN__
// TODO should use GetComputerNameEx() when available
// the idea is that if someone had set wxUSE_SOCKETS to 0 the code
// shouldn't use winsock.dll (a.k.a. ws2_32.dll) at all so only use this
// code if we link with it anyhow
#if wxUSE_SOCKETS
// we don't want to always link with Winsock DLL as we might not use it at
// all, so load it dynamically here if needed
wxDynamicLibrary dllWinsock(_T("ws2_32.dll"), wxDL_VERBATIM);
if ( dllWinsock.IsLoaded() )
{
typedef int (PASCAL *WSAStartup_t)(WORD, WSADATA *);
typedef int (PASCAL *gethostname_t)(char *, int);
typedef hostent* (PASCAL *gethostbyname_t)(const char *);
typedef hostent* (PASCAL *gethostbyaddr_t)(const char *, int , int);
typedef int (PASCAL *WSACleanup_t)(void);
#define LOAD_WINSOCK_FUNC(func) \
func ## _t \
pfn ## func = (func ## _t)dllWinsock.GetSymbol(_T(#func))
LOAD_WINSOCK_FUNC(WSAStartup);
WSADATA wsa;
if ( WSAStartup(MAKEWORD(1, 1), &wsa) == 0 )
if ( pfnWSAStartup && pfnWSAStartup(MAKEWORD(1, 1), &wsa) == 0 )
{
LOAD_WINSOCK_FUNC(gethostname);
wxString host;
char bufA[256];
if ( gethostname(bufA, WXSIZEOF(bufA)) == 0 )
if ( pfngethostname )
{
// gethostname() won't usually include the DNS domain name, for
// this we need to work a bit more
char bufA[256];
if ( pfngethostname(bufA, WXSIZEOF(bufA)) == 0 )
{
// gethostname() won't usually include the DNS domain name,
// for this we need to work a bit more
if ( !strchr(bufA, '.') )
{
struct hostent *pHostEnt = gethostbyname(bufA);
LOAD_WINSOCK_FUNC(gethostbyname);
struct hostent *pHostEnt = pfngethostbyname
? pfngethostbyname(bufA)
: NULL;
if ( pHostEnt )
{
// Windows will use DNS internally now
pHostEnt = gethostbyaddr(pHostEnt->h_addr, 4, AF_INET);
LOAD_WINSOCK_FUNC(gethostbyaddr);
pHostEnt = pfngethostbyaddr
? pfngethostbyaddr(pHostEnt->h_addr,
4, AF_INET)
: NULL;
}
if ( pHostEnt )
@@ -175,8 +202,12 @@ bool wxGetFullHostName(wxChar *buf, int maxSize)
}
}
}
}
LOAD_WINSOCK_FUNC(WSACleanup);
if ( pfnWSACleanup )
pfnWSACleanup();
WSACleanup();
if ( !host.empty() )
{
@@ -185,10 +216,8 @@ bool wxGetFullHostName(wxChar *buf, int maxSize)
return TRUE;
}
}
#endif // wxUSE_SOCKETS
#endif // Win32
}
#endif // !__WXMICROWIN__
return wxGetHostName(buf, maxSize);
}