GetIpAddrTable 抛出堆栈错误

如何解决GetIpAddrTable 抛出堆栈错误

谁能解释为什么这段代码在第一次调用 GetIpAddrTable 时会抛出异常？运行时库抱怨堆损坏。 重启后的第一次调用有效，但之后就不行了。

#define MALLOC(x) HeapAlloc(GetProcessHeap(),(x))
#define FREE(x) HeapFree(GetProcessHeap(),(x))

BOOL GetMyIPAddress(LPVOID addressBuffer) {
    int i;
    BOOL result = FALSE;
    IN_ADDR loopbacksubnet = { 0 },loopbackNetwork = { 0 };
    IN6_ADDR ipv6Loopback;
    ZeroMemory(&ipv6Loopback,sizeof(IN6_ADDR));

    inet_pton(AF_INET,"255.255.0.0",&loopbacksubnet);
    inet_pton(AF_INET,"127.0.0.1",&loopbackNetwork);
    inet_pton(AF_INET6,"::1",&ipv6Loopback);

    /* Variables used by GetIpAddrTable */
    PMIB_IPADDRTABLE pIPAddrTable = (MIB_IPADDRTABLE*)MALLOC(sizeof(MIB_IPADDRTABLE));
    if (pIPAddrTable)
    {
        DWORD dwSize = 0;
        ZeroMemory(pIPAddrTable,dwSize);
        DWORD dwRetVal = 0;
        IN_ADDR IPAddr = { 0 };

        /* Variables used to return error message */
        LPVOID lpMsgBuf = NULL;
        // Make an initial call to GetIpAddrTable to get the
        // necessary size into the dwSize variable
        if (GetIpAddrTable(pIPAddrTable,&dwSize,FALSE) == ERROR_INSUFFICIENT_BUFFER) {
            FREE(pIPAddrTable);
            pIPAddrTable = (MIB_IPADDRTABLE*)MALLOC(dwSize);
            if (pIPAddrTable == NULL) {
                printf("Memory allocation Failed for GetIpAddrTable\n");
                return FALSE;
            }
            else {
                ZeroMemory(pIPAddrTable,dwSize);
                // Make a second call to GetIpAddrTable to get the
                // actual data we want
                dwRetVal = GetIpAddrTable(pIPAddrTable,FALSE);
                if (dwRetVal != NO_ERROR) {
                    printf("GetIpAddrTable Failed with error %d\n",dwRetVal);
                    if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYstem | FORMAT_MESSAGE_IGnorE_INSERTS,NULL,dwRetVal,MAKELANGID(LANG_NEUTRAL,SUBLANG_DEFAULT),// Default language
                        (LPTSTR)&lpMsgBuf,NULL)) {
                        _RPT1(_CRT_WARN,"\tError: %s",lpMsgBuf);
                        LocalFree(lpMsgBuf);
                        return FALSE;
                    }
                }
                for (i = 0; i < (int)pIPAddrTable->dwNumEntries; i++) {
                    IPAddr.S_un.S_addr = (u_long)pIPAddrTable->table[i].dwAddr;
                    if (((IPAddr.S_un.S_addr & loopbacksubnet.S_un.S_addr) ^ (loopbackNetwork.S_un.S_addr & loopbacksubnet.S_un.S_addr)) != 0)
                    {
                        ((IN_ADDR*)addressBuffer)->S_un.S_addr = IPAddr.S_un.S_addr;
                        result = TRUE;
                        break;
                    }
                }
                FREE(pIPAddrTable);
                pIPAddrTable = NULL;
            }
        }
    }
    return result;
}

它是从这里解除的： https://docs.microsoft.com/en-us/windows/win32/api/iphlpapi/nf-iphlpapi-getipaddrtable

解决方法

谢谢大家 - 我想我已经解决了这个问题。是其他地方的问题 - 我讨厌调试服务！