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https://gitee.com/acl-dev/acl.git
synced 2024-12-15 01:10:52 +08:00
76 lines
1.5 KiB
C++
76 lines
1.5 KiB
C++
#include "StdAfx.h"
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#include <IPTypes.h>
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#include <Iphlpapi.h>
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#include "util.h"
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#pragma comment(lib, "Iphlpapi.lib")
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#ifndef VC6
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typedef FIXED_INFO_W2KSP1 FIXED_INFO;
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#endif
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static size_t collect(const FIXED_INFO *fi, std::vector<acl::string>& dns_list)
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{
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const IP_ADDR_STRING* next = &fi->DnsServerList;
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do
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{
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dns_list.push_back(next->IpAddress.String);
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next = next->Next;
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} while (next != NULL);
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return dns_list.size();
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}
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size_t util::get_dns(std::vector<acl::string>& dns_list)
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{
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FIXED_INFO *fi;
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ULONG n;
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n = sizeof(FIXED_INFO);
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fi= (FIXED_INFO*) acl_mycalloc(1, n) ;
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#if (NTDDI_VERSION >= NTDDI_WIN2KSP1)
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DWORD ret = ::GetNetworkParams(fi, &n);
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#endif
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if (ret == ERROR_SUCCESS)
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{
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size_t n1 = collect(fi, dns_list);
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acl_myfree(fi);
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return n1;
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}
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else if (ret != ERROR_BUFFER_OVERFLOW)
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{
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acl_myfree(fi);
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return 0;
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}
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acl_myfree(fi);
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fi= (FIXED_INFO*) acl_mycalloc(1, n);
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ret = ::GetNetworkParams(fi, &n);
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if (ret != ERROR_SUCCESS)
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{
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acl_myfree(fi);
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return 0;
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}
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size_t n2 = collect(fi, dns_list);
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acl_myfree(fi);
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return n2;
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}
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double util::stamp_sub(const struct timeval *from, const struct timeval *sub_by)
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{
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struct timeval res;
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memcpy(&res, from, sizeof(struct timeval));
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res.tv_usec -= sub_by->tv_usec;
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if (res.tv_usec < 0) {
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--res.tv_sec;
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res.tv_usec += 1000000;
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}
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res.tv_sec -= sub_by->tv_sec;
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return (res.tv_sec * 1000.0 + res.tv_usec/1000.0);
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}
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