httpd_states.dot

digraph g {
    rankdir=LR;

    node       [shape = circle];
    //
    P_R_L         [label = "Parsing\nRequest\nLine"];
    T_C_I         [label = "Try\nConnection\nIP"];
    S_D_R         [label = "Send\nDoh\nRequest"];
    A_D_R         [label = "Await\nDOH\nResponse"];
    S_R_L         [label = "Send\nRequest\nLine"];
    CONNECTED     [label = "Connected"];
    CLOSING       [label = "Closing"];
    EMPTY_BUF     [label = "Empty\nBuffers"];
    ERROR          [label = "Error"];
    DONE          [label = "Done", shape = doublecircle];

    P_R_L -> T_C_I   [label= "Host Type IP"];
    P_R_L -> S_D_R   [label= "Host Type Domain"];
    P_R_L -> ERROR   [label= "Error"];
    
    T_C_I -> S_R_L   [label= "Connected to origin"];
    T_C_I -> S_D_R   [label= "Fail IPV4 DNS,\nTry IPV6"];
    T_C_I -> ERROR   [label= "Error"];

    S_R_L -> CONNECTED   [label= "Request Line Sent"];
    S_R_L -> ERROR   [label= "Error"];

    S_D_R -> A_D_R   [label= "Send Request"];
    S_D_R -> ERROR   [label= "Error"];

    A_D_R -> T_C_I   [label= "Try Resolved IP"];
    A_D_R -> ERROR   [label= "Error"];

    CONNECTED -> CLOSING   [label= "One Side Closed Connection"];

    CLOSING -> EMPTY_BUF   [label= "Send Leftover Data"];
    CLOSING -> DONE   [label= "No Data Left"];

    EMPTY_BUF -> DONE   [label= "No Data Left"];

    ERROR -> DONE   [label= "Send Error"];



    
}