CLIInterface.c

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/************************************************************************************
* Copyright (C) 2020                                                               *
* TETCOS, Bangalore. India                                                         *
*                                                                                  *
* Tetcos owns the intellectual property rights in the Product and its content.     *
* The copying, redistribution, reselling or publication of any or all of the       *
* Product or its content without express prior written consent of Tetcos is        *
* prohibited. Ownership and / or any other right relating to the software and all  *
* intellectual property rights therein shall remain at all times with Tetcos.      *
*                                                                                  *
* Author:    Shashi Kant Suman                                                     *
*                                                                                  *
* ---------------------------------------------------------------------------------*/
#include "main.h"
#include "OpenFlow.h"
#include "CLIInterface.h"
 
void openFlow_saveHandle(NETSIM_ID d,
                         UINT id,
                         void* handle)
{
    ptrOPENFLOW of = GET_OPENFLOW_VAR(d);
    ptrHANDLEINFO h = calloc(1, sizeof* h);
    h->handle = handle;
    h->id = id;
    if (of->handleInfo)
    {
        ptrHANDLEINFO t = of->handleInfo;
        while (t->next)
            t = t->next;
        t->next = h;
    }
    else
    {
        of->handleInfo = h;
    }
}
 
ptrHANDLEINFO openFlow_getHandle(NETSIM_ID d,
                                 UINT id)
{
    ptrOPENFLOW of = GET_OPENFLOW_VAR(d);
    ptrHANDLEINFO t = of->handleInfo;
    ptrHANDLEINFO p = NULL;
    while (t)
    {
        if (t->id == id)
        {
            if (p)
                p->next = t->next;
            else
                of->handleInfo = t->next;
            void* h = t->handle;
            free(t);
            return h;
        }
        p = t;
        t = t->next;
    }
    return NULL;
}
 
 
static bool validate_input(CLIHANDLE handle, ptrCOMMANDARRAY cmd)
{
    if (!isSDNController(pstruEventDetails->nDeviceId))
    {
        CLI_SEND_MESSAGE(handle, "%d (%s) device is not a SDN controller\n",
                         DEVICE_CONFIGID(pstruEventDetails->nDeviceId),
                         DEVICE_NAME(pstruEventDetails->nDeviceId));
        return false;
    }
    NETSIM_ID c = fn_NetSim_Stack_GetDeviceId_asName(cmd->commands[0]);
    if (!c ||
        !isOPENFLOWConfigured(c))
    {
        CLI_SEND_MESSAGE(handle, "%d (%s) device is not an OPEN_FLOW compatible device.\n",
                         c,
                         cmd->commands[0]);
        return false;
    }
    return true;
}
 
typedef struct stru_multArgs
{
    NETSIM_ID d;
    UINT id;
    void* handle;
}MULTARG, *ptrMULTARG;
bool openflow_multiple_response_handler(ptrMULTARG arg,
                                        char* msg,
                                        int len,
                                        bool isMore)
{
    if (!arg->id)
    {
        CLI_PRINT_MESSAGE(arg->handle, msg, len);
        if (!isMore)
            CLI_STOP_WAITING(arg->handle);
    }
    else
    {
        openFlow_send_response(arg->d,
                               arg->id,
                               msg,
                               len,
                               isMore);
    }
    if (!isMore)
        free(arg);
    return isMore;
}
 
void handle_cli_input()
{
    CLIHANDLE handle = pstruEventDetails->szOtherDetails;
    ptrCOMMANDARRAY cmd = CLI_GET_CMDARRAY_FROM_HANDLE(handle);
 
    if (validate_input(handle, cmd))
    {
        CLI_SEND_MESSAGE(handle, "Input is validated\n");
        NETSIM_ID d = fn_NetSim_Stack_GetDeviceId_asName(cmd->commands[0]);
        cmd = remove_first_word_from_commandArray(cmd);
        if (d == pstruEventDetails->nDeviceId)
        {
            CLI_SEND_MESSAGE(handle, "Command is for SDN Controller\n");
            int len = 0;
            ptrMULTARG arg = calloc(1, sizeof* arg);
            arg->d = d;
            arg->handle = handle;
            bool isMore;
            char* ret = CLI_EXECUTE_COMMAND(cmd,
                                            d,
                                            &len,
                                            openflow_multiple_response_handler,
                                            arg,
                                            &isMore);
            CLI_PRINT_MESSAGE(handle, ret, len);
            if (!isMore)
            {
                free(arg);
                CLI_STOP_WAITING(handle);
            }
        }
        else
        {
            CLI_SEND_MESSAGE(handle, "Sending command to client device %d\n", d);
            if (!fn_NetSim_OPEN_FLOW_SendCommand(d, handle, cmd, cmd->length))
                CLI_STOP_WAITING(handle);
        }
    }
    else
    {
        CLI_STOP_WAITING(handle);
    }
}
 
char* openFlow_execute_command(void* handle, NETSIM_ID d, UINT id, int* len, bool* isMore)
{
    ptrMULTARG arg = calloc(1, sizeof* arg);
    arg->d = d;
    arg->id = id;
    return CLI_EXECUTE_COMMAND(handle, d, len, openflow_multiple_response_handler, arg, isMore);
}
 
void openFlow_print_response(NETSIM_ID d,
                             UINT id,
                             void* msg,
                             int len,
                             bool isMore)
{
    void* handle = openFlow_getHandle(d, id);
    if (handle)
    {
        CLI_PRINT_MESSAGE(handle, msg, len);
        if (!isMore)
            CLI_STOP_WAITING(handle);
        else
            openFlow_saveHandle(d, id, handle);
    }
}