text: /*
   * Copyright (c) 2017-2019 Cisco and/or its affiliates.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at:
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifdef WITH_POLICY
  
  #include <hicn/hicn-light/config.h>
  
  #include <ctype.h>
  #include <parc/algol/parc_List.h>
  #include <parc/algol/parc_Memory.h>
  #include <parc/algol/parc_Network.h>
  #include <parc/assert/parc_Assert.h>
  #include <stdbool.h>
  #include <stdint.h>
  #include <stdio.h>
  #include <stdlib.h>
  
  #include <hicn/utils/address.h>
  
  #include <hicn/config/controlRemovePolicy.h>
  
  #include <hicn/utils/commands.h>
  #include <hicn/utils/utils.h>
  
  static CommandReturn _controlRemovePolicy_Execute(CommandParser *parser,
                                                   CommandOps *ops,
                                                   PARCList *args,
                                                   char *output,
                                                   size_t output_size);
  static CommandReturn _controlRemovePolicy_HelpExecute(CommandParser *parser,
                                                       CommandOps *ops,
                                                       PARCList *args,
                                                       char *output,
                                                       size_t output_size);
  
  // ===================================================
  
  static const char *_commandRemovePolicy = "remove policy";
  static const char *_commandRemovePolicyHelp = "help remove policy";
  
  // ====================================================
  
  CommandOps *controlRemovePolicy_Create(ControlState *state) {
    return commandOps_Create(state, _commandRemovePolicy, NULL,
                             _controlRemovePolicy_Execute, commandOps_Destroy);
  }
  
  CommandOps *controlRemovePolicy_HelpCreate(ControlState *state) {
    return commandOps_Create(state, _commandRemovePolicyHelp, NULL,
                             _controlRemovePolicy_HelpExecute, commandOps_Destroy);
  }
  
  // ====================================================
  
  static CommandReturn _controlRemovePolicy_HelpExecute(CommandParser *parser,
                                                       CommandOps *ops,
                                                       PARCList *args,
                                                       char *output,
                                                       size_t output_size) {
    snprintf(output, output_size, "commands:\n"
                                  "    remove policy <prefix>\n");
    return CommandReturn_Success;
  }
  
  static CommandReturn _controlRemovePolicy_Execute(CommandParser *parser,
                                                   CommandOps *ops,
                                                   PARCList *args,
                                                   char *output,
                                                   size_t output_size) {
    ControlState *state = ops->closure;
  
    if (parcList_Size(args) != 3) {
      _controlRemovePolicy_HelpExecute(parser, ops, args, output, output_size);
      return CommandReturn_Failure;
    }
  
    const char *prefixStr = parcList_GetAtIndex(args, 2);
    char *addr = (char *)malloc(sizeof(char) * (strlen(prefixStr) + 1));
  
    // separate address and len
    char *slash;
    uint32_t len = 0;
    strcpy(addr, prefixStr);
    slash = strrchr(addr, '/');
    if (slash != NULL) {
      len = atoi(slash + 1);
      *slash = '\0';
    }
  
    // allocate command payload
    remove_policy_command *removePolicyCommand =
        parcMemory_AllocateAndClear(sizeof(remove_policy_command));
  
    // check and set IP address
    if (inet_pton(AF_INET, addr, &removePolicyCommand->address.v4.as_u32) == 1) {
      if (len > 32) {
        snprintf(output, output_size, "ERROR: exceeded INET mask length, max=32\n");
        parcMemory_Deallocate(&removePolicyCommand);
        free(addr);
        return CommandReturn_Failure;
      }
      removePolicyCommand->addressType = ADDR_INET;
    } else if (inet_pton(AF_INET6, addr, &removePolicyCommand->address.v6.as_in6addr) ==
               1) {
      if (len > 128) {
        snprintf(output, output_size, "ERROR: exceeded INET6 mask length, max=128\n");
        parcMemory_Deallocate(&removePolicyCommand);
        free(addr);
        return CommandReturn_Failure;
      }
      removePolicyCommand->addressType = ADDR_INET6;
    } else {
      snprintf(output, output_size, "Error: %s is not a valid network address \n", addr);
      parcMemory_Deallocate(&removePolicyCommand);
      free(addr);
      return CommandReturn_Failure;
    }
  
    free(addr);
    // Fill remaining payload fields
    removePolicyCommand->len = len;
  
    // send message and receive response
    struct iovec *response = utils_SendRequest(
        state, REMOVE_POLICY, removePolicyCommand, sizeof(remove_policy_command));
  
    if (!response) {  // get NULL pointer
      return CommandReturn_Failure;
    }
  
    parcMemory_Deallocate(&response);  // free iovec pointer
    return CommandReturn_Success;
  }
  
  #endif /* WITH_POLICY */
  