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#include "stdafx.h"
struct CONNECTION *GetConnectionsTable()
{
// Declare and initialize variables
MIB_TCPTABLE_OWNER_PID *pTcpTable = (MIB_TCPTABLE_OWNER_PID *)MALLOC(sizeof(MIB_TCPTABLE_OWNER_PID));
if (pTcpTable == NULL) {
//printf("Error allocating memory!\n");
return NULL;
}
DWORD dwSize = sizeof(MIB_TCPTABLE_OWNER_PID);
// Make an initial call to GetTcpTable to
// get the necessary size into the dwSize variable
DWORD dwRetVal = GetExtendedTcpTable(pTcpTable, &dwSize, TRUE, AF_INET, TCP_TABLE_OWNER_PID_ALL, 0);
if (dwRetVal == ERROR_INSUFFICIENT_BUFFER) {
FREE(pTcpTable);
pTcpTable = (MIB_TCPTABLE_OWNER_PID *)MALLOC(dwSize);
if (pTcpTable == NULL) {
//printf("Error allocating memory\n");
return NULL;
}
}
// Make a second call to GetTcpTable to get
// the actual data we require
if ((dwRetVal = GetExtendedTcpTable(pTcpTable, &dwSize, TRUE, AF_INET, TCP_TABLE_OWNER_PID_ALL, 0)) != NO_ERROR) {
//printf("\tGetTcpTable() failed with return value %d\n", dwRetVal);
FREE(pTcpTable);
return NULL;
}
//printf("\tLocal Addr\tLocal Port\tRemote Addr\tRemote Port\n");
//printf("Number of entries: %d\n", (int) pTcpTable->dwNumEntries);
struct in_addr IpAddr;
struct CONNECTION *connHead = NULL;
for (DWORD i = 0; i < pTcpTable->dwNumEntries; i++) {
struct CONNECTION *newConn = (struct CONNECTION*)mir_alloc(sizeof(struct CONNECTION));
memset(newConn, 0, sizeof(struct CONNECTION));
//pid2name(pTcpTable->table[i].dwOwningPid,&newConn->Pname);
if (pTcpTable->table[i].dwLocalAddr) {
IpAddr.S_un.S_addr = (ULONG)pTcpTable->table[i].dwLocalAddr;
//_snprintf(newConn->strIntIp,_countof(newConn->strIntIp),"%d.%d.%d.%d",IpAddr.S_un.S_un_b.s_b1,IpAddr.S_un.S_un_b.s_b2,IpAddr.S_un.S_un_b.s_b3,IpAddr.S_un.S_un_b.s_b4);
TCHAR *strIntIp = mir_a2t(inet_ntoa(IpAddr));
_tcsncpy(newConn->strIntIp, strIntIp, SIZEOF(newConn->strIntIp) - 1);
mir_free(strIntIp);
}
if (pTcpTable->table[i].dwRemoteAddr) {
IpAddr.S_un.S_addr = (u_long)pTcpTable->table[i].dwRemoteAddr;
TCHAR *strExtIp = mir_a2t(inet_ntoa(IpAddr));
_tcsncpy(newConn->strExtIp, strExtIp, SIZEOF(newConn->strExtIp) - 1);
mir_free(strExtIp);
}
newConn->state = pTcpTable->table[i].dwState;
newConn->intIntPort = ntohs((u_short)pTcpTable->table[i].dwLocalPort);
newConn->intExtPort = ntohs((u_short)pTcpTable->table[i].dwRemotePort);
newConn->Pid = pTcpTable->table[i].dwOwningPid;
switch (pTcpTable->table[i].dwState) {
case MIB_TCP_STATE_CLOSED:
//printf("CLOSED\n");
break;
case MIB_TCP_STATE_LISTEN:
//printf("LISTEN\n");
break;
case MIB_TCP_STATE_SYN_SENT:
//printf("SYN-SENT\n");
break;
case MIB_TCP_STATE_SYN_RCVD:
//printf("SYN-RECEIVED\n");
break;
case MIB_TCP_STATE_ESTAB:
//printf("ESTABLISHED\n");
break;
case MIB_TCP_STATE_FIN_WAIT1:
//printf("FIN-WAIT-1\n");
break;
case MIB_TCP_STATE_FIN_WAIT2:
//printf("FIN-WAIT-2 \n");
break;
case MIB_TCP_STATE_CLOSE_WAIT:
//printf("CLOSE-WAIT\n");
break;
case MIB_TCP_STATE_CLOSING:
//printf("CLOSING\n");
break;
case MIB_TCP_STATE_LAST_ACK:
//printf("LAST-ACK\n");
break;
case MIB_TCP_STATE_TIME_WAIT:
//printf("TIME-WAIT\n");
break;
case MIB_TCP_STATE_DELETE_TCB:
//printf("DELETE-TCB\n");
break;
default:
//printf("UNKNOWN dwState value\n");
break;
}
newConn->next = connHead;
connHead = newConn;
//printf("TCP[%d]:%s%15d%20s%15d\n", i, szLocalAddr,ntohs((u_short)pTcpTable->table[i].dwLocalPort), szRemoteAddr,ntohs((u_short)pTcpTable->table[i].dwRemotePort));
//printf("\tTCP[%d] Local Addr: %s\n", i, szLocalAddr);
// printf("\tTCP[%d] Local Port: %d \n", i, ntohs((u_short)pTcpTable->table[i].dwLocalPort));
//printf("\tTCP[%d] Remote Addr: %s\n", i, szRemoteAddr);
//printf("\tTCP[%d] Remote Port: %d\n", i, ntohs((u_short)pTcpTable->table[i].dwRemotePort));
}
FREE(pTcpTable);
return connHead;
}
void deleteConnectionsTable(struct CONNECTION *head)
{
struct CONNECTION *cur = head, *del;
while (cur != NULL) {
del = cur;
cur = cur->next;
mir_free(del);
head = cur;
}
head = NULL;
}
struct CONNECTION *searchConnection(struct CONNECTION *head, TCHAR *intIp, TCHAR *extIp, int intPort, int extPort, int state)
{
for (struct CONNECTION *cur = head; cur != NULL; cur = cur->next) {
if (_tcscmp(cur->strIntIp, intIp) == 0 &&
_tcscmp(cur->strExtIp, extIp) == 0 &&
cur->intExtPort == extPort &&
cur->intIntPort == intPort &&
cur->state == state)
return cur;
}
return NULL;
}
void getDnsName(TCHAR *strIp, TCHAR *strHostName, size_t len)
{
in_addr iaHost;
char *szStrIP = mir_t2a(strIp);
iaHost.s_addr = inet_addr(szStrIP);
mir_free(szStrIP);
hostent *h = gethostbyaddr((char *)&iaHost, sizeof(struct in_addr), AF_INET);
_tcsncpy_s(strHostName, len, (h == NULL) ? strIp : _A2T(h->h_name), _TRUNCATE);
}
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