1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#undef __CRT__NO_INLINE
#define __CRT__NO_INLINE
#include <winsock2.h>
#include <wspiapi.h>
int WINAPI
WspiapiLookupNode (const char *pszNodeName,
int iSocketType, int iProtocol,
WORD wPort, WINBOOL bAI_CANONNAME,
struct addrinfo **pptResult)
{
int err = 0, cntAlias = 0;
char name[NI_MAXHOST] = "";
char alias[NI_MAXHOST] = "";
char *pname = name, *palias = alias, *tmp = NULL;
strncpy (pname, pszNodeName, NI_MAXHOST - 1);
pname[NI_MAXHOST - 1] = 0;
for (;;)
{
err = WspiapiQueryDNS (pszNodeName, iSocketType, iProtocol, wPort, palias, pptResult);
if (err)
break;
if (*pptResult)
break;
++cntAlias;
if (strlen (palias) == 0 || !strcmp (pname, palias) || cntAlias == 16)
{
err = EAI_FAIL;
break;
}
WspiapiSwap(pname, palias, tmp);
}
if (!err && bAI_CANONNAME)
{
(*pptResult)->ai_canonname = WspiapiStrdup (palias);
if (!(*pptResult)->ai_canonname)
err = EAI_MEMORY;
}
return err;
}
|
