Kea: flex_option_callouts.cc File Reference

| Kea 3.2.0-git

flex_option_callouts.cc File Reference
`#include <config.h>`
`#include <flex_option.h>`
`#include <flex_option_log.h>`
`#include <cc/command_interpreter.h>`
`#include <hooks/hooks.h>`
`#include <dhcp/pkt4.h>`
`#include <dhcp/pkt6.h>`
`#include <dhcpsrv/cfgmgr.h>`
`#include <process/daemon.h>`
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Go to the source code of this file.

## Namespaces
namespace | isc
| Defines the logger used by the top-level component of kea-lfc.
namespace | isc::flex_option

## Functions
int | load (LibraryHandle &handle)
| This function is called when the library is loaded.
int | multi_threading_compatible ()
| This function is called to retrieve the multi-threading compatibility.
int | pkt4_send (CalloutHandle &handle)
| This callout is called at the "pkt4_send" hook.
int | pkt6_send (CalloutHandle &handle)
| This callout is called at the "pkt6_send" hook.
int | unload ()
| This function is called when the library is unloaded.

## Variables
FlexOptionImplPtr | isc::flex_option::impl

## Function Documentation

## ◆ load()

int load | ( | LibraryHandle & | handle | ) |

This function is called when the library is loaded.

Parameters

  handle | library handle

Returns
  0 when initialization is successful, 1 otherwise

Definition at line 124 of file flex_option_callouts.cc.

References FLEX_OPTION_LOAD_ERROR, isc::flex_option::flex_option_logger, isc::dhcp::CfgMgr::getFamily(), isc::hooks::LibraryHandle::getParameter(), isc::process::Daemon::getProcName(), isc::flex_option::impl, isc::dhcp::CfgMgr::instance(), isc_throw, and LOG_ERROR.

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## ◆ multi_threading_compatible()

int multi_threading_compatible | ( |  | ) |

This function is called to retrieve the multi-threading compatibility.

Returns
  1 which means compatible with multi-threading.

Definition at line 165 of file flex_option_callouts.cc.

## ◆ pkt4_send()

int pkt4_send | ( | CalloutHandle & | handle | ) |

This callout is called at the "pkt4_send" hook.

It retrieves v4 query and response packets, and then adds, supersedes or removes option values in the response according to expressions evaluated on the query.

Parameters

  handle | CalloutHandle.

Returns
  0 upon success, non-zero otherwise

Definition at line 47 of file flex_option_callouts.cc.

References isc::flex_option::flex_option_logger, FLEX_OPTION_PROCESS_ERROR, isc::hooks::CalloutHandle::getArgument(), isc::hooks::CalloutHandle::getStatus(), isc::flex_option::impl, isc_throw, LOG_ERROR, CalloutHandle::NEXT_STEP_DROP, CalloutHandle::NEXT_STEP_SKIP, and isc::dhcp::Option::V4.

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## ◆ pkt6_send()

int pkt6_send | ( | CalloutHandle & | handle | ) |

This callout is called at the "pkt6_send" hook.

It retrieves v6 query and response packets, and then adds, supersedes or removes option values in the response according to expressions evaluated on the query.

Parameters

  handle | CalloutHandle.

Returns
  0 upon success, non-zero otherwise

Definition at line 88 of file flex_option_callouts.cc.

References isc::flex_option::flex_option_logger, FLEX_OPTION_PROCESS_ERROR, isc::hooks::CalloutHandle::getArgument(), isc::hooks::CalloutHandle::getStatus(), isc::flex_option::impl, isc_throw, LOG_ERROR, CalloutHandle::NEXT_STEP_DROP, CalloutHandle::NEXT_STEP_SKIP, and isc::dhcp::Option::V6.

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## ◆ unload()

int unload | ( |  | ) |

This function is called when the library is unloaded.

Returns
  always 0.

Definition at line 156 of file flex_option_callouts.cc.

References isc::flex_option::flex_option_logger, FLEX_OPTION_UNLOAD, isc::flex_option::impl, and LOG_INFO.