| 7 | |
| 8 | |
| 9 | int WinSys::ActiveConnectionTracker::EnumConnections() { |
| 10 | DWORD size = 1 << 16; |
| 11 | auto orgSize = size; |
| 12 | DWORD error = NO_ERROR; |
| 13 | void* buffer = nullptr; |
| 14 | |
| 15 | bool first = _connections.empty(); |
| 16 | _newConnections.clear(); |
| 17 | _closedConnections.clear(); |
| 18 | if (first) { |
| 19 | _connectionMap.reserve(512); |
| 20 | _newConnections.reserve(16); |
| 21 | _closedConnections.reserve(16); |
| 22 | } |
| 23 | |
| 24 | auto map = _connectionMap; |
| 25 | std::vector<std::shared_ptr<Connection>> local; |
| 26 | local.reserve(256); |
| 27 | if ((_trackedConnections & ConnectionType::Tcp) == ConnectionType::Tcp) { |
| 28 | do |
| 29 | { |
| 30 | buffer = ::VirtualAlloc(nullptr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); |
| 31 | if (!buffer) |
| 32 | return -1; |
| 33 | error = ::GetExtendedTcpTable(buffer, &size, FALSE, AF_INET, TCP_TABLE_OWNER_MODULE_ALL, 0); |
| 34 | if (error != NO_ERROR) |
| 35 | ::VirtualFree(buffer, 0, MEM_RELEASE); |
| 36 | } while (error == ERROR_INSUFFICIENT_BUFFER); |
| 37 | |
| 38 | if (error == NOERROR) { |
| 39 | auto table = (PMIB_TCPTABLE_OWNER_MODULE)buffer; |
| 40 | AddTcp4Connections(table, map, local, first); |
| 41 | ::VirtualFree(buffer,0,MEM_RELEASE); |
| 42 | } |
| 43 | } |
| 44 | if ((_trackedConnections & ConnectionType::TcpV6) == ConnectionType::TcpV6) { |
| 45 | size = orgSize; |
| 46 | do |
| 47 | { |
| 48 | buffer = ::VirtualAlloc(nullptr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); |
| 49 | if (!buffer) |
| 50 | return -1; |
| 51 | error = ::GetExtendedTcpTable(buffer, &size, FALSE, AF_INET6, TCP_TABLE_OWNER_MODULE_ALL, 0); |
| 52 | if (error != NO_ERROR) |
| 53 | ::VirtualFree(buffer, 0, MEM_RELEASE); |
| 54 | } while (error == ERROR_INSUFFICIENT_BUFFER); |
| 55 | if (error == NOERROR) { |
| 56 | auto table = (PMIB_TCP6TABLE_OWNER_MODULE)buffer; |
| 57 | AddTcp6Connections(table, map, local, first); |
| 58 | ::VirtualFree(buffer, 0, MEM_RELEASE); |
| 59 | } |
| 60 | } |
| 61 | if ((_trackedConnections & ConnectionType::Udp) == ConnectionType::Udp) { |
| 62 | size = orgSize; |
| 63 | do |
| 64 | { |
| 65 | buffer = ::VirtualAlloc(nullptr, size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE); |
| 66 | if (!buffer) |