Function AcceptConnection

src/net.cpp:860–932

static list<CNode*> vNodesDisconnected;

static void AcceptConnection(const ListenSocket& hListenSocket) {

    struct sockaddr_storage sockaddr;
    socklen_t len = sizeof(sockaddr);
    SOCKET hSocket = accept(hListenSocket.socket, (struct sockaddr *) &sockaddr, &len);
    CAddress addr;
    int nInbound = 0;
    int nMaxOutbound = 0;
    int nMaxInbound = nMaxConnections - (nMaxOutbound);

    if (hSocket != INVALID_SOCKET)
        if (!addr.SetSockAddr((const struct sockaddr *) &sockaddr))
            LogPrintf("Warning: Unknown socket family\n");

    bool whitelisted = hListenSocket.whitelisted || CNode::IsWhitelistedRange(addr);

    vector<CNode*> vNodesCopy;
    {
        LOCK(cs_vNodes);
        vNodesCopy = vNodes;
    }

    for (CNode *pnode : vNodesCopy)
        if (pnode && pnode->fInbound)
            nInbound++;

    if (hSocket == INVALID_SOCKET) {
        int nErr = WSAGetLastError();
        if (nErr != WSAEWOULDBLOCK)
            LogPrintf("socket error accept failed: %s\n", NetworkErrorString(nErr));
        return;
    }

    if (!IsSelectableSocket(hSocket)) {
        LogPrintf("connection from %s dropped: non-selectable socket\n", addr.ToString());
        CloseSocket(hSocket);
        return;
    }

    if (CNode::IsBanned(addr) && !whitelisted) {
        LogPrintf("connection from %s dropped (banned)\n", addr.ToString());
        CloseSocket(hSocket);
        return;
    }

    if (nInbound >= nMaxInbound) {
        LogPrint("net", "connection from %s dropped (full)\n", addr.ToString());
        CloseSocket(hSocket);
        return;
    }

    if (nInbound >= nMaxConnections - MAX_OUTBOUND_CONNECTIONS) {
        LogPrint("net", "connection from %s dropped (full)\n", addr.ToString());
        CloseSocket(hSocket);
        return;
    }

    if (!fNetworkActive) {