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reactos/base/applications/network/netstat/netstat.c
Pierre Schweitzer 29c883e2a5
[NETSTAT] Add support for displaying UDP connections owning process 
Our netstat can basically look like this now:
https://twitter.com/HeisSpiter/status/1066430887208919040
2018-11-24 21:41:11 +01:00

678 lines
22 KiB
C
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/*
* PROJECT: ReactOS netstat utility
* LICENSE: GPL - See COPYING in the top level directory
* FILE: base/applications/network/netstat/netstat.c
* PURPOSE: display IP stack statistics
* COPYRIGHT: Copyright 2005 Ged Murphy <gedmurphy@gmail.com>
*/
/*
* TODO:
* sort function return values.
* implement -b, -o and -v
* clean up GetIpHostName
* command line parser needs more work
*/
#define WIN32_NO_STATUS
#include <stdarg.h>
#include <windef.h>
#include <winbase.h>
#define _INC_WINDOWS
#include <winsock2.h>
#include <tchar.h>
#include <stdio.h>
#include <stdlib.h>
#include <iphlpapi.h>
#include "netstat.h"
enum ProtoType {IP, TCP, UDP, ICMP} Protocol;
DWORD Interval; /* time to pause between printing output */
/* TCP endpoint states */
TCHAR TcpState[][32] = {
_T("???"),
_T("CLOSED"),
_T("LISTENING"),
_T("SYN_SENT"),
_T("SYN_RCVD"),
_T("ESTABLISHED"),
_T("FIN_WAIT1"),
_T("FIN_WAIT2"),
_T("CLOSE_WAIT"),
_T("CLOSING"),
_T("LAST_ACK"),
_T("TIME_WAIT"),
_T("DELETE_TCB")
};
/*
* format message string and display output
*/
DWORD DoFormatMessage(DWORD ErrorCode)
{
LPVOID lpMsgBuf;
DWORD RetVal;
if ((RetVal = FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
ErrorCode,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
(LPTSTR) &lpMsgBuf,
0,
NULL )))
{
_tprintf(_T("%s"), (LPTSTR)lpMsgBuf);
LocalFree(lpMsgBuf);
/* return number of TCHAR's stored in output buffer
* excluding '\0' - as FormatMessage does*/
return RetVal;
}
else
return 0;
}
/*
*
* Parse command line parameters and set any options
*
*/
BOOL ParseCmdline(int argc, char* argv[])
{
LPSTR Proto;
CHAR c;
INT i;
if ((argc == 1) || (_istdigit(*argv[1])))
bNoOptions = TRUE;
/* Parse command line for options we have been given. */
for (i = 1; i < argc; i++)
{
if ((argc > 1) && (argv[i][0] == '-' || argv[i][0] == '/'))
{
while ((c = *++argv[i]) != '\0')
{
switch (tolower(c))
{
case 'a' :
bDoShowAllCons = TRUE;
break;
case 'b' :
bDoShowProcName = TRUE;
break;
case 'e' :
bDoShowEthStats = TRUE;
break;
case 'n' :
bDoShowNumbers = TRUE;
break;
case 'p' :
bDoShowProtoCons = TRUE;
Proto = argv[i+1];
if (!_stricmp("IP", Proto))
Protocol = IP;
else if (!_stricmp("ICMP", Proto))
Protocol = ICMP;
else if (!_stricmp("TCP", Proto))
Protocol = TCP;
else if (!_stricmp("UDP", Proto))
Protocol = UDP;
else
{
Usage();
return EXIT_FAILURE;
}
break;
case 'r' :
bDoShowRouteTable = TRUE;
break;
case 's' :
bDoShowProtoStats = TRUE;
break;
case 'o' :
bDoShowProcessId = TRUE;
break;
case 'v' :
_tprintf(_T("got v\n"));
bDoDispSeqComp = TRUE;
break;
default :
Usage();
return EXIT_FAILURE;
}
}
}
else if (_istdigit(*argv[i]))
{
if (_stscanf(argv[i], "%lu", &Interval) != EOF)
bLoopOutput = TRUE;
else
return EXIT_FAILURE;
}
// else
// {
// Usage();
// EXIT_FAILURE;
// }
}
return EXIT_SUCCESS;
}
/*
* Display table header
*/
VOID DisplayTableHeader()
{
_tprintf(_T("\n Proto Local Address Foreign Address State"));
if (bDoShowProcessId)
_tprintf(_T(" Process\n"));
else
_tprintf(_T("\n"));
}
/*
* Simulate Microsofts netstat utility output
*/
BOOL DisplayOutput()
{
if (bNoOptions)
{
DisplayTableHeader();
ShowTcpTable();
return EXIT_SUCCESS;
}
if (bDoShowRouteTable)
{
/* mingw doesn't have lib for _tsystem */
if (system("route print") == -1)
{
_tprintf(_T("cannot find 'route.exe'\n"));
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
if (bDoShowEthStats)
{
ShowEthernetStatistics();
return EXIT_SUCCESS;
}
if (bDoShowProtoCons)
{
switch (Protocol)
{
case IP :
if (bDoShowProtoStats)
{
ShowIpStatistics();
return EXIT_SUCCESS;
}
break;
case ICMP :
if (bDoShowProtoStats)
{
ShowIcmpStatistics();
return EXIT_SUCCESS;
}
break;
case TCP :
if (bDoShowProtoStats)
ShowTcpStatistics();
_tprintf(_T("\nActive Connections\n"));
DisplayTableHeader();
ShowTcpTable();
break;
case UDP :
if (bDoShowProtoStats)
ShowUdpStatistics();
_tprintf(_T("\nActive Connections\n"));
DisplayTableHeader();
ShowUdpTable();
break;
default :
break;
}
}
else if (bDoShowProtoStats)
{
ShowIpStatistics();
ShowIcmpStatistics();
ShowTcpStatistics();
ShowUdpStatistics();
return EXIT_SUCCESS;
}
else
{
_tprintf(_T("\nActive Connections\n"));
DisplayTableHeader();
ShowTcpTable();
if (bDoShowAllCons)
ShowUdpTable();
}
return EXIT_SUCCESS;
}
VOID ShowIpStatistics()
{
PMIB_IPSTATS pIpStats;
DWORD dwRetVal;
pIpStats = (MIB_IPSTATS*) HeapAlloc(GetProcessHeap(), 0, sizeof(MIB_IPSTATS));
if ((dwRetVal = GetIpStatistics(pIpStats)) == NO_ERROR)
{
_tprintf(_T("\nIPv4 Statistics\n\n"));
_tprintf(_T(" %-34s = %lu\n"), _T("Packets Received"), pIpStats->dwInReceives);
_tprintf(_T(" %-34s = %lu\n"), _T("Received Header Errors"), pIpStats->dwInHdrErrors);
_tprintf(_T(" %-34s = %lu\n"), _T("Received Address Errors"), pIpStats->dwInAddrErrors);
_tprintf(_T(" %-34s = %lu\n"), _T("Datagrams Forwarded"), pIpStats->dwForwDatagrams);
_tprintf(_T(" %-34s = %lu\n"), _T("Unknown Protocols Received"), pIpStats->dwInUnknownProtos);
_tprintf(_T(" %-34s = %lu\n"), _T("Received Packets Discarded"), pIpStats->dwInDiscards);
_tprintf(_T(" %-34s = %lu\n"), _T("Received Packets Delivered"), pIpStats->dwInDelivers);
_tprintf(_T(" %-34s = %lu\n"), _T("Output Requests"), pIpStats->dwOutRequests);
_tprintf(_T(" %-34s = %lu\n"), _T("Routing Discards"), pIpStats->dwRoutingDiscards);
_tprintf(_T(" %-34s = %lu\n"), _T("Discarded Output Packets"), pIpStats->dwOutDiscards);
_tprintf(_T(" %-34s = %lu\n"), _T("Output Packets No Route"), pIpStats->dwOutNoRoutes);
_tprintf(_T(" %-34s = %lu\n"), _T("Reassembly Required"), pIpStats->dwReasmReqds);
_tprintf(_T(" %-34s = %lu\n"), _T("Reassembly Succesful"), pIpStats->dwReasmOks);
_tprintf(_T(" %-34s = %lu\n"), _T("Reassembly Failures"), pIpStats->dwReasmFails);
// _tprintf(_T(" %-34s = %lu\n"), _T("Datagrams successfully fragmented"), NULL); /* FIXME: what is this one? */
_tprintf(_T(" %-34s = %lu\n"), _T("Datagrams Failing Fragmentation"), pIpStats->dwFragFails);
_tprintf(_T(" %-34s = %lu\n"), _T("Fragments Created"), pIpStats->dwFragCreates);
}
else
DoFormatMessage(dwRetVal);
HeapFree(GetProcessHeap(), 0, pIpStats);
}
VOID ShowIcmpStatistics()
{
PMIB_ICMP pIcmpStats;
DWORD dwRetVal;
pIcmpStats = (MIB_ICMP*) HeapAlloc(GetProcessHeap(), 0, sizeof(MIB_ICMP));
if ((dwRetVal = GetIcmpStatistics(pIcmpStats)) == NO_ERROR)
{
_tprintf(_T("\nICMPv4 Statistics\n\n"));
_tprintf(_T(" Received Sent\n"));
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Messages"),
pIcmpStats->stats.icmpInStats.dwMsgs, pIcmpStats->stats.icmpOutStats.dwMsgs);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Errors"),
pIcmpStats->stats.icmpInStats.dwErrors, pIcmpStats->stats.icmpOutStats.dwErrors);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Destination Unreachable"),
pIcmpStats->stats.icmpInStats.dwDestUnreachs, pIcmpStats->stats.icmpOutStats.dwDestUnreachs);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Time Exceeded"),
pIcmpStats->stats.icmpInStats.dwTimeExcds, pIcmpStats->stats.icmpOutStats.dwTimeExcds);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Parameter Problems"),
pIcmpStats->stats.icmpInStats.dwParmProbs, pIcmpStats->stats.icmpOutStats.dwParmProbs);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Source Quenches"),
pIcmpStats->stats.icmpInStats.dwSrcQuenchs, pIcmpStats->stats.icmpOutStats.dwSrcQuenchs);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Redirects"),
pIcmpStats->stats.icmpInStats.dwRedirects, pIcmpStats->stats.icmpOutStats.dwRedirects);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Echos"),
pIcmpStats->stats.icmpInStats.dwEchos, pIcmpStats->stats.icmpOutStats.dwEchos);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Echo Replies"),
pIcmpStats->stats.icmpInStats.dwEchoReps, pIcmpStats->stats.icmpOutStats.dwEchoReps);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Timestamps"),
pIcmpStats->stats.icmpInStats.dwTimestamps, pIcmpStats->stats.icmpOutStats.dwTimestamps);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Timestamp Replies"),
pIcmpStats->stats.icmpInStats.dwTimestampReps, pIcmpStats->stats.icmpOutStats.dwTimestampReps);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Address Masks"),
pIcmpStats->stats.icmpInStats.dwAddrMasks, pIcmpStats->stats.icmpOutStats.dwAddrMasks);
_tprintf(_T(" %-25s %-11lu %lu\n"), _T("Address Mask Replies"),
pIcmpStats->stats.icmpInStats.dwAddrMaskReps, pIcmpStats->stats.icmpOutStats.dwAddrMaskReps);
}
else
DoFormatMessage(dwRetVal);
HeapFree(GetProcessHeap(), 0, pIcmpStats);
}
VOID ShowTcpStatistics()
{
PMIB_TCPSTATS pTcpStats;
DWORD dwRetVal;
pTcpStats = (MIB_TCPSTATS*) HeapAlloc(GetProcessHeap(), 0, sizeof(MIB_TCPSTATS));
if ((dwRetVal = GetTcpStatistics(pTcpStats)) == NO_ERROR)
{
_tprintf(_T("\nTCP Statistics for IPv4\n\n"));
_tprintf(_T(" %-35s = %lu\n"), _T("Active Opens"), pTcpStats->dwActiveOpens);
_tprintf(_T(" %-35s = %lu\n"), _T("Passive Opens"), pTcpStats->dwPassiveOpens);
_tprintf(_T(" %-35s = %lu\n"), _T("Failed Connection Attempts"), pTcpStats->dwAttemptFails);
_tprintf(_T(" %-35s = %lu\n"), _T("Reset Connections"), pTcpStats->dwEstabResets);
_tprintf(_T(" %-35s = %lu\n"), _T("Current Connections"), pTcpStats->dwCurrEstab);
_tprintf(_T(" %-35s = %lu\n"), _T("Segments Received"), pTcpStats->dwInSegs);
_tprintf(_T(" %-35s = %lu\n"), _T("Segments Sent"), pTcpStats->dwOutSegs);
_tprintf(_T(" %-35s = %lu\n"), _T("Segments Retransmitted"), pTcpStats->dwRetransSegs);
}
else
DoFormatMessage(dwRetVal);
HeapFree(GetProcessHeap(), 0, pTcpStats);
}
VOID ShowUdpStatistics()
{
PMIB_UDPSTATS pUdpStats;
DWORD dwRetVal;
pUdpStats = (MIB_UDPSTATS*) HeapAlloc(GetProcessHeap(), 0, sizeof(MIB_UDPSTATS));
if ((dwRetVal = GetUdpStatistics(pUdpStats)) == NO_ERROR)
{
_tprintf(_T("\nUDP Statistics for IPv4\n\n"));
_tprintf(_T(" %-21s = %lu\n"), _T("Datagrams Received"), pUdpStats->dwInDatagrams);
_tprintf(_T(" %-21s = %lu\n"), _T("No Ports"), pUdpStats->dwNoPorts);
_tprintf(_T(" %-21s = %lu\n"), _T("Receive Errors"), pUdpStats->dwInErrors);
_tprintf(_T(" %-21s = %lu\n"), _T("Datagrams Sent"), pUdpStats->dwOutDatagrams);
}
else
DoFormatMessage(dwRetVal);
HeapFree(GetProcessHeap(), 0, pUdpStats);
}
VOID ShowEthernetStatistics()
{
PMIB_IFTABLE pIfTable;
DWORD dwSize = 0;
DWORD dwRetVal = 0;
pIfTable = (MIB_IFTABLE*) HeapAlloc(GetProcessHeap(), 0, sizeof(MIB_IFTABLE));
if (GetIfTable(pIfTable, &dwSize, 0) == ERROR_INSUFFICIENT_BUFFER)
{
HeapFree(GetProcessHeap(), 0, pIfTable);
pIfTable = (MIB_IFTABLE*) HeapAlloc(GetProcessHeap(), 0, dwSize);
if ((dwRetVal = GetIfTable(pIfTable, &dwSize, 0)) == NO_ERROR)
{
_tprintf(_T("Interface Statistics\n\n"));
_tprintf(_T(" Received Sent\n\n"));
_tprintf(_T("%-20s %14lu %15lu\n"), _T("Bytes"),
pIfTable->table[0].dwInOctets, pIfTable->table[0].dwOutOctets);
_tprintf(_T("%-20s %14lu %15lu\n"), _T("Unicast packets"),
pIfTable->table[0].dwInUcastPkts, pIfTable->table[0].dwOutUcastPkts);
_tprintf(_T("%-20s %14lu %15lu\n"), _T("Non-unicast packets"),
pIfTable->table[0].dwInNUcastPkts, pIfTable->table[0].dwOutNUcastPkts);
_tprintf(_T("%-20s %14lu %15lu\n"), _T("Discards"),
pIfTable->table[0].dwInDiscards, pIfTable->table[0].dwOutDiscards);
_tprintf(_T("%-20s %14lu %15lu\n"), _T("Errors"),
pIfTable->table[0].dwInErrors, pIfTable->table[0].dwOutErrors);
_tprintf(_T("%-20s %14lu\n"), _T("Unknown Protocols"),
pIfTable->table[0].dwInUnknownProtos);
}
else
DoFormatMessage(dwRetVal);
}
HeapFree(GetProcessHeap(), 0, pIfTable);
}
VOID ShowTcpTable()
{
PMIB_TCPTABLE_OWNER_PID tcpTable;
DWORD error, dwSize;
DWORD i;
CHAR HostIp[HOSTNAMELEN], HostPort[PORTNAMELEN];
CHAR RemoteIp[HOSTNAMELEN], RemotePort[PORTNAMELEN];
CHAR Host[ADDRESSLEN];
CHAR Remote[ADDRESSLEN];
CHAR PID[64];
/* Get the table of TCP endpoints */
dwSize = sizeof (MIB_TCPTABLE_OWNER_PID);
/* Should also work when we get new connections between 2 GetTcpTable()
* calls: */
do
{
tcpTable = (PMIB_TCPTABLE_OWNER_PID) HeapAlloc(GetProcessHeap(), 0, dwSize);
error = GetExtendedTcpTable(tcpTable, &dwSize, TRUE, AF_INET, TCP_TABLE_OWNER_PID_ALL, 0);
if ( error != NO_ERROR )
HeapFree(GetProcessHeap(), 0, tcpTable);
}
while ( error == ERROR_INSUFFICIENT_BUFFER );
if (error != NO_ERROR)
{
printf("Failed to snapshot TCP endpoints.\n");
DoFormatMessage(error);
exit(EXIT_FAILURE);
}
/* Dump the TCP table */
for (i = 0; i < tcpTable->dwNumEntries; i++)
{
/* If we aren't showing all connections, only display established, close wait
* and time wait. This is the default output for netstat */
if (bDoShowAllCons || (tcpTable->table[i].dwState == MIB_TCP_STATE_ESTAB)
|| (tcpTable->table[i].dwState == MIB_TCP_STATE_CLOSE_WAIT)
|| (tcpTable->table[i].dwState == MIB_TCP_STATE_TIME_WAIT))
{
/* I've split this up so it's easier to follow */
GetIpHostName(TRUE, tcpTable->table[i].dwLocalAddr, HostIp, HOSTNAMELEN);
GetPortName(tcpTable->table[i].dwLocalPort, "tcp", HostPort, PORTNAMELEN);
sprintf(Host, "%s:%s", HostIp, HostPort);
if (tcpTable->table[i].dwState == MIB_TCP_STATE_LISTEN)
{
sprintf(Remote, "%s:0", HostIp);
}
else
{
GetIpHostName(FALSE, tcpTable->table[i].dwRemoteAddr, RemoteIp, HOSTNAMELEN);
GetPortName(tcpTable->table[i].dwRemotePort, "tcp", RemotePort, PORTNAMELEN);
sprintf(Remote, "%s:%s", RemoteIp, RemotePort);
}
if (bDoShowProcessId)
{
sprintf(PID, "%ld", tcpTable->table[i].dwOwningPid);
}
else
{
PID[0] = 0;
}
_tprintf(_T(" %-6s %-22s %-22s %-11s %s\n"), _T("TCP"),
Host, Remote, TcpState[tcpTable->table[i].dwState], PID);
}
}
HeapFree(GetProcessHeap(), 0, tcpTable);
}
VOID ShowUdpTable()
{
PMIB_UDPTABLE_OWNER_PID udpTable;
DWORD error, dwSize;
DWORD i;
CHAR HostIp[HOSTNAMELEN], HostPort[PORTNAMELEN];
CHAR Host[ADDRESSLEN];
CHAR PID[64];
/* Get the table of UDP endpoints */
dwSize = 0;
error = GetExtendedUdpTable(NULL, &dwSize, TRUE, AF_INET, UDP_TABLE_OWNER_PID, 0);
if (error != ERROR_INSUFFICIENT_BUFFER)
{
printf("Failed to snapshot UDP endpoints.\n");
DoFormatMessage(error);
exit(EXIT_FAILURE);
}
udpTable = (PMIB_UDPTABLE_OWNER_PID) HeapAlloc(GetProcessHeap(), 0, dwSize);
error = GetExtendedUdpTable(udpTable, &dwSize, TRUE, AF_INET, UDP_TABLE_OWNER_PID, 0);
if (error)
{
printf("Failed to snapshot UDP endpoints table.\n");
DoFormatMessage(error);
HeapFree(GetProcessHeap(), 0, udpTable);
exit(EXIT_FAILURE);
}
/* Dump the UDP table */
for (i = 0; i < udpTable->dwNumEntries; i++)
{
/* I've split this up so it's easier to follow */
GetIpHostName(TRUE, udpTable->table[i].dwLocalAddr, HostIp, HOSTNAMELEN);
GetPortName(udpTable->table[i].dwLocalPort, "tcp", HostPort, PORTNAMELEN);
sprintf(Host, "%s:%s", HostIp, HostPort);
if (bDoShowProcessId)
{
sprintf(PID, "%ld", udpTable->table[i].dwOwningPid);
}
else
{
PID[0] = 0;
}
_tprintf(_T(" %-6s %-22s %-34s %s\n"), _T("UDP"), Host, _T("*:*"), PID);
}
HeapFree(GetProcessHeap(), 0, udpTable);
}
/*
* Translate port numbers into their text equivalent if there is one
*/
PCHAR
GetPortName(UINT Port, PCSTR Proto, CHAR Name[], INT NameLen)
{
struct servent *pServent;
if (bDoShowNumbers)
{
sprintf(Name, "%d", htons((WORD)Port));
return Name;
}
/* Try to translate to a name */
if ((pServent = getservbyport(Port, Proto)))
strcpy(Name, pServent->s_name );
else
sprintf(Name, "%d", htons((WORD)Port));
return Name;
}
/*
* convert addresses into dotted decimal or hostname
*/
PCHAR
GetIpHostName(BOOL Local, UINT IpAddr, CHAR Name[], int NameLen)
{
// struct hostent *phostent;
UINT nIpAddr;
/* display dotted decimal */
nIpAddr = htonl(IpAddr);
if (bDoShowNumbers) {
sprintf(Name, "%d.%d.%d.%d",
(nIpAddr >> 24) & 0xFF,
(nIpAddr >> 16) & 0xFF,
(nIpAddr >> 8) & 0xFF,
(nIpAddr) & 0xFF);
return Name;
}
Name[0] = _T('\0');
/* try to resolve the name */
if (!IpAddr) {
if (!Local) {
sprintf(Name, "%d.%d.%d.%d",
(nIpAddr >> 24) & 0xFF,
(nIpAddr >> 16) & 0xFF,
(nIpAddr >> 8) & 0xFF,
(nIpAddr) & 0xFF);
} else {
if (gethostname(Name, NameLen) != 0)
DoFormatMessage(WSAGetLastError());
}
} else if (IpAddr == 0x0100007f) {
if (Local) {
if (gethostname(Name, NameLen) != 0)
DoFormatMessage(WSAGetLastError());
} else {
_tcsncpy(Name, _T("localhost"), 10);
}
// } else if (phostent = gethostbyaddr((char*)&ipaddr, sizeof(nipaddr), PF_INET)) {
// strcpy(name, phostent->h_name);
} else {
sprintf(Name, "%d.%d.%d.%d",
((nIpAddr >> 24) & 0x000000FF),
((nIpAddr >> 16) & 0x000000FF),
((nIpAddr >> 8) & 0x000000FF),
((nIpAddr) & 0x000000FF));
}
return Name;
}
VOID Usage()
{
_tprintf(_T("\nDisplays current TCP/IP protocol statistics and network connections.\n\n"
"NETSTAT [-a] [-e] [-n] [-p proto] [-r] [-s] [interval]\n\n"
" -a Displays all connections and listening ports.\n"
" -e Displays Ethernet statistics. May be combined with -s\n"
" option\n"
" -n Displays address and port numbers in numeric form.\n"
" -p proto Shows connections for protocol 'proto' TCP or UDP.\n"
" If used with the -s option to display\n"
" per-protocol statistics, 'proto' may be TCP, UDP, or IP.\n"
" -r Displays the current routing table.\n"
" -s Displays per-protocol statistics. By default, Statistics are\n"
" shown for IP, ICMP, TCP and UDP;\n"
" the -p option may be used to specify a subset of the default.\n"
" -o Displays the process ID for each connection.\n"
" interval Redisplays selected statistics every 'interval' seconds.\n"
" Press CTRL+C to stop redisplaying. By default netstat will\n"
" print the current information only once.\n"));
}
/*
*
* Parse command line parameters and set any options
* Run display output, looping over set intervals if a number is given
*
*/
int main(int argc, char *argv[])
{
WSADATA wsaData;
if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
_tprintf(_T("WSAStartup() failed : %d\n"), WSAGetLastError());
return -1;
}
if (ParseCmdline(argc, argv))
return -1;
if (bLoopOutput)
{
while (1)
{
if (DisplayOutput())
return -1;
Sleep(Interval*1000);
}
}
if (DisplayOutput())
return -1;
else
return 0;
}
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