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path: root/src/CMakeLists.txt
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# Copyright (c) 2018 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.

cmake_minimum_required(VERSION 3.13)

set(CMAKE_C_COMPILER_NAMES
  clang-13
  clang-12
  clang-11
  clang-10
  clang-9
  gcc-10
  gcc-9
  cc
)

project(vpp C)

if(NOT DEFINED CMAKE_INSTALL_LIBDIR AND EXISTS "/etc/debian_version")
  set(CMAKE_INSTALL_LIBDIR "lib/${CMAKE_LIBRARY_ARCHITECTURE}")
endif()

include(CheckCCompilerFlag)
include(CheckIPOSupported)
include(GNUInstallDirs)
include(cmake/misc.cmake)
include(cmake/cpu.cmake)
include(cmake/ccache.cmake)

##############################################################################
# VPP Version
##############################################################################
execute_process(
  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  COMMAND scripts/version
  OUTPUT_VARIABLE VPP_VERSION
  OUTPUT_STRIP_TRAILING_WHITESPACE
)
string(REPLACE "-" ";" VPP_LIB_VERSION ${VPP_VERSION})
list(GET VPP_LIB_VERSION 0 VPP_LIB_VERSION)

##############################################################################
# cross compiling
##############################################################################
if(CMAKE_CROSSCOMPILING)
  set(CMAKE_IGNORE_PATH
    /usr/lib/${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu/
    /usr/lib/${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu/lib/
  )
endif()
set(CMAKE_C_COMPILER_TARGET ${CMAKE_SYSTEM_PROCESSOR}-linux-gnu)

##############################################################################
# build config
##############################################################################
check_c_compiler_flag("-Wno-address-of-packed-member"
		      compiler_flag_no_address_of_packed_member)
set(VPP_RUNTIME_DIR ${CMAKE_INSTALL_BINDIR} CACHE STRING "Relative runtime directory path")
set(VPP_LIBRARY_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING "Relative library directory path")

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${VPP_RUNTIME_DIR})
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/${VPP_LIBRARY_DIR})
set(VPP_BINARY_DIR ${CMAKE_BINARY_DIR}/CMakeFiles)
set(PYENV PYTHONPYCACHEPREFIX=${CMAKE_BINARY_DIR}/CMakeFiles/__pycache__)

if (CMAKE_BUILD_TYPE)
  add_compile_options(-g -Werror -Wall)
endif()

if (compiler_flag_no_address_of_packed_member)
  add_compile_options(-Wno-address-of-packed-member)
endif()

string(TOLOWER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_LC)
string(TOUPPER "${CMAKE_BUILD_TYPE}" CMAKE_BUILD_TYPE_UC)

set(CMAKE_C_FLAGS_RELEASE "")
set(CMAKE_C_FLAGS_DEBUG "")

if (${CMAKE_BUILD_TYPE_LC} MATCHES "release")
  add_compile_options(-O3 -fstack-protector -fno-common)
  add_compile_definitions(_FORTIFY_SOURCE=2)
elseif (${CMAKE_BUILD_TYPE_LC} MATCHES "debug")
  add_compile_options(-O0 -fstack-protector -fno-common)
  add_compile_definitions(CLIB_DEBUG)
elseif (${CMAKE_BUILD_TYPE_LC} MATCHES "coverity")
  add_compile_options(-O0)
  add_compile_definitions(__COVERITY__)
elseif (${CMAKE_BUILD_TYPE_LC} MATCHES "gcov")
  add_compile_options(-O0 -fprofile-arcs -ftest-coverage)
  add_compile_definitions(CLIB_DEBUG CLIB_GCOV)
endif()

set(BUILD_TYPES release debug coverity gcov)
string(REPLACE ";" " " BUILD_TYPES_STR "${BUILD_TYPES}")
set_property(CACHE CMAKE_BUILD_TYPE PROPERTY
	     HELPSTRING "Build type - valid options are: ${BUILD_TYPES_STR}")

##############################################################################
# link time optimizations
##############################################################################
if (CMAKE_BUILD_TYPE_UC STREQUAL "RELEASE")
  check_ipo_supported(RESULT _result)
  if (_result)
    option(VPP_USE_LTO "Link time optimization of release binaries" ON)
  endif()
endif()

if(VPP_USE_LTO)
  check_c_compiler_flag("-Wno-stringop-overflow"
		        compiler_flag_no_stringop_overflow)
endif()
##############################################################################
# sanitizers
##############################################################################

option(VPP_ENABLE_SANITIZE_ADDR "Enable Address Sanitizer" OFF)
set(VPP_SANITIZE_ADDR_OPTIONS
  "unmap_shadow_on_exit=1:disable_coredump=0:abort_on_error=1:detect_leaks=0"
  CACHE
  STRING "Address sanitizer arguments"
)

if (VPP_ENABLE_SANITIZE_ADDR)
  add_compile_options(-fsanitize=address)
  add_compile_definitions(CLIB_SANITIZE_ADDR)
  add_link_options(-fsanitize=address)
endif (VPP_ENABLE_SANITIZE_ADDR)

##############################################################################
# trajectory trace
##############################################################################

option(VPP_ENABLE_TRAJECTORY_TRACE "Build vpp with trajectory tracing enabled" OFF)
if(VPP_ENABLE_TRAJECTORY_TRACE)
  add_compile_definitions(VLIB_BUFFER_TRACE_TRAJECTORY=1)
endif()

##############################################################################
# unittest with clang ode coverage
##############################################################################

if("${CMAKE_VERSION}" VERSION_GREATER_EQUAL "3.13" AND "${CMAKE_C_COMPILER_ID}" MATCHES "(Apple)?[Cc]lang")
  option(VPP_BUILD_TESTS_WITH_COVERAGE "Build unit tests with code coverage" OFF)
endif()

##############################################################################
# install config
##############################################################################
option(VPP_SET_RPATH "Set rpath for resulting binaries and libraries." ON)
if(VPP_SET_RPATH)
  set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${VPP_LIBRARY_DIR}")
endif()
set(CMAKE_INSTALL_MESSAGE NEVER)

include_directories (
	${CMAKE_SOURCE_DIR}
	${VPP_BINARY_DIR}
)
set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME "vpp")

set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

include(cmake/syscall.cmake)
include(cmake/api.cmake)
include(cmake/library.cmake)
include(cmake/exec.cmake)
include(cmake/plugin.cmake)

##############################################################################
# subdirs - order matters
##############################################################################
option(VPP_HOST_TOOLS_ONLY "Build only host tools" OFF)
if(VPP_HOST_TOOLS_ONLY)
  set(SUBDIRS tools/vppapigen cmake)
elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
  find_package(OpenSSL)
  set(SUBDIRS
    vppinfra svm vlib vlibmemory vlibapi vnet vpp vat vat2 vcl vpp-api
    plugins tools/vppapigen tools/g2 tools/perftool cmake pkg
    tools/appimage
  )
elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
  set(SUBDIRS vppinfra)
else()
  message(FATAL_ERROR "Unsupported system: ${CMAKE_SYSTEM_NAME}")
endif()

foreach(DIR ${SUBDIRS})
  add_subdirectory(${DIR} ${VPP_BINARY_DIR}/${DIR})
endforeach()

##############################################################################
# detect if we are inside git repo and add configure dependency
##############################################################################
execute_process(
  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  COMMAND git rev-parse --show-toplevel
  OUTPUT_VARIABLE VPP_GIT_TOPLEVEL_DIR
  OUTPUT_STRIP_TRAILING_WHITESPACE
  ERROR_QUIET
)

if (VPP_GIT_TOPLEVEL_DIR)
  set_property(
    DIRECTORY APPEND PROPERTY
    CMAKE_CONFIGURE_DEPENDS ${VPP_GIT_TOPLEVEL_DIR}/.git/index
  )
endif()

##############################################################################
# custom targets
##############################################################################

add_custom_target(run
  COMMAND ./${VPP_RUNTIME_DIR}/vpp -c startup.conf
  COMMENT "Starting VPP..."
  USES_TERMINAL
)

add_custom_target(debug
  COMMAND gdb --args ./${VPP_RUNTIME_DIR}/vpp -c startup.conf
  COMMENT "Starting VPP in the debugger..."
  USES_TERMINAL
)

add_custom_target(config
  COMMAND ccmake ${CMAKE_BINARY_DIR}
  COMMENT "Starting Configuration TUI..."
  USES_TERMINAL
)

foreach(bt ${BUILD_TYPES})
  add_custom_target(set-build-type-${bt}
    COMMAND cmake -DCMAKE_BUILD_TYPE:STRING=${bt} .
    COMMENT "Changing build type to ${bt}"
    USES_TERMINAL
  )
endforeach()

mark_as_advanced(CLEAR
  CMAKE_C_FLAGS
  CMAKE_C_COMPILER
  CMAKE_EXPORT_COMPILE_COMMANDS
  CMAKE_INSTALL_PREFIX
  CMAKE_LINKER
  CMAKE_SHARED_LINKER_FLAGS
  CMAKE_VERBOSE_MAKEFILE
)

##############################################################################
# print configuration
##############################################################################
message(STATUS "Configuration:")
pr("VPP version" ${VPP_VERSION})
pr("VPP library version" ${VPP_LIB_VERSION})
pr("GIT toplevel dir" ${VPP_GIT_TOPLEVEL_DIR})
pr("Build type" ${CMAKE_BUILD_TYPE})
pr("C compiler" ${CMAKE_C_COMPILER})
pr("C flags" ${CMAKE_C_FLAGS}${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UC}})
pr("Linker flags (apps)" ${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE_UC}})
pr("Linker flags (libs)" ${CMAKE_SHARED_LINKER_FLAGS} ${CMAKE_SHARED_LINKER_FLAGS_${CMAKE_BUILD_TYPE_UC}})
pr("Host processor" ${CMAKE_HOST_SYSTEM_PROCESSOR})
pr("Target processor" ${CMAKE_SYSTEM_PROCESSOR})
pr("Prefix path" ${CMAKE_PREFIX_PATH})
pr("Install prefix" ${CMAKE_INSTALL_PREFIX})
pr("Library dir" ${VPP_LIBRARY_DIR})
ghlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */ } 
/*
 *------------------------------------------------------------------
 * memory_client.c - API message handling, client code.
 *
 * Copyright (c) 2010 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.
 *------------------------------------------------------------------
 */

#include <setjmp.h>

#include <svm/svm.h>
#include <svm/ssvm.h>
#include <vppinfra/serialize.h>
#include <vppinfra/hash.h>
#include <vlibmemory/memory_client.h>

/* A hack. vl_client_get_first_plugin_msg_id depends on it */
#include <vlibmemory/socket_client.h>

#include <vlibmemory/vl_memory_msg_enum.h>

#define vl_typedefs		/* define message structures */
#include <vlibmemory/vl_memory_api_h.h>
#undef vl_typedefs

#define vl_endianfun		/* define message structures */
#include <vlibmemory/vl_memory_api_h.h>
#undef vl_endianfun

/* instantiate all the print functions we know about */
#define vl_print(handle, ...) clib_warning (__VA_ARGS__)
#define vl_printfun
#include <vlibmemory/vl_memory_api_h.h>
#undef vl_printfun

typedef struct
{
  u8 rx_thread_jmpbuf_valid;
  u8 connected_to_vlib;
  jmp_buf rx_thread_jmpbuf;
  pthread_t rx_thread_handle;
  /* Plugin message base lookup scheme */
  volatile u8 first_msg_id_reply_ready;
  u16 first_msg_id_reply;
} memory_client_main_t;

memory_client_main_t memory_client_main;

static void *
rx_thread_fn (void *arg)
{
  svm_queue_t *q;
  memory_client_main_t *mm = &memory_client_main;
  api_main_t *am = &api_main;
  int i;

  q = am->vl_input_queue;

  /* So we can make the rx thread terminate cleanly */
  if (setjmp (mm->rx_thread_jmpbuf) == 0)
    {
      mm->rx_thread_jmpbuf_valid = 1;
      /*
       * Find an unused slot in the per-cpu-mheaps array,
       * and grab it for this thread. We need to be able to
       * push/pop the thread heap without affecting other thread(s).
       */
      if (__os_thread_index == 0)
	{
	  for (i = 0; i < ARRAY_LEN (clib_per_cpu_mheaps); i++)
	    {
	      if (clib_per_cpu_mheaps[i] == 0)
		{
		  /* Copy the main thread mheap pointer */
		  clib_per_cpu_mheaps[i] = clib_per_cpu_mheaps[0];
		  __os_thread_index = i;
		  break;
		}
	    }
	  ASSERT (__os_thread_index > 0);
	}
      while (1)
	vl_msg_api_queue_handler (q);
    }
  pthread_exit (0);
}

static void
vl_api_rx_thread_exit_t_handler (vl_api_rx_thread_exit_t * mp)
{
  memory_client_main_t *mm = &memory_client_main;
  vl_msg_api_free (mp);
  longjmp (mm->rx_thread_jmpbuf, 1);
}

static void
vl_api_name_and_crc_free (void)
{
  api_main_t *am = &api_main;
  int i;
  u8 **keys = 0;
  hash_pair_t *hp;

  if (!am->msg_index_by_name_and_crc)
    return;

  /* *INDENT-OFF* */
  hash_foreach_pair (hp, am->msg_index_by_name_and_crc,
      ({
        vec_add1 (keys, (u8 *) hp->key);
      }));
  /* *INDENT-ON* */
  for (i = 0; i < vec_len (keys); i++)
    vec_free (keys[i]);
  vec_free (keys);
  hash_free (am->msg_index_by_name_and_crc);
}

static void
vl_api_memclnt_create_reply_t_handler (vl_api_memclnt_create_reply_t * mp)
{
  serialize_main_t _sm, *sm = &_sm;
  api_main_t *am = &api_main;
  u8 *tblv;
  u32 nmsgs;
  int i;
  u8 *name_and_crc;
  u32 msg_index;

  am->my_client_index = mp->index;
  am->my_registration = (vl_api_registration_t *) (uword) mp->handle;

  /* Clean out any previous hash table (unlikely) */
  vl_api_name_and_crc_free ();

  am->msg_index_by_name_and_crc = hash_create_string (0, sizeof (uword));

  /* Recreate the vnet-side API message handler table */
  tblv = uword_to_pointer (mp->message_table, u8 *);
  unserialize_open_data (sm, tblv, vec_len (tblv));
  unserialize_integer (sm, &nmsgs, sizeof (u32));

  for (i = 0; i < nmsgs; i++)
    {
      msg_index = unserialize_likely_small_unsigned_integer (sm);
      unserialize_cstring (sm, (char **) &name_and_crc);
      hash_set_mem (am->msg_index_by_name_and_crc, name_and_crc, msg_index);
    }
}

static void
noop_handler (void *notused)
{
}

int
vl_client_connect (const char *name, int ctx_quota, int input_queue_size)
{
  svm_region_t *svm;
  vl_api_memclnt_create_t *mp;
  vl_api_memclnt_create_reply_t *rp;
  svm_queue_t *vl_input_queue;
  vl_shmem_hdr_t *shmem_hdr;
  int rv = 0;
  void *oldheap;
  api_main_t *am = &api_main;

  if (am->my_registration)
    {
      clib_warning ("client %s already connected...", name);
      return -1;
    }

  if (am->vlib_rp == 0)
    {
      clib_warning ("am->vlib_rp NULL");
      return -1;
    }

  svm = am->vlib_rp;
  shmem_hdr = am->shmem_hdr;

  if (shmem_hdr == 0 || shmem_hdr->vl_input_queue == 0)
    {
      clib_warning ("shmem_hdr / input queue NULL");
      return -1;
    }

  pthread_mutex_lock (&svm->mutex);
  oldheap = svm_push_data_heap (svm);
  vl_input_queue = svm_queue_alloc_and_init (input_queue_size, sizeof (uword),
					     getpid ());
  svm_pop_heap (oldheap);
  pthread_mutex_unlock (&svm->mutex);

  am->my_client_index = ~0;
  am->my_registration = 0;
  am->vl_input_queue = vl_input_queue;

  mp = vl_msg_api_alloc (sizeof (vl_api_memclnt_create_t));
  memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_MEMCLNT_CREATE);
  mp->ctx_quota = ctx_quota;
  mp->input_queue = (uword) vl_input_queue;
  strncpy ((char *) mp->name, name, sizeof (mp->name) - 1);

  vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & mp);

  while (1)
    {
      int qstatus;
      struct timespec ts, tsrem;
      int i;

      /* Wait up to 10 seconds */
      for (i = 0; i < 1000; i++)
	{
	  qstatus = svm_queue_sub (vl_input_queue, (u8 *) & rp,
				   SVM_Q_NOWAIT, 0);
	  if (qstatus == 0)
	    goto read_one_msg;
	  ts.tv_sec = 0;
	  ts.tv_nsec = 10000 * 1000;	/* 10 ms */
	  while (nanosleep (&ts, &tsrem) < 0)
	    ts = tsrem;
	}
      /* Timeout... */
      clib_warning ("memclnt_create_reply timeout");
      return -1;

    read_one_msg:
      if (ntohs (rp->_vl_msg_id) != VL_API_MEMCLNT_CREATE_REPLY)
	{
	  clib_warning ("unexpected reply: id %d", ntohs (rp->_vl_msg_id));
	  continue;
	}
      rv = clib_net_to_host_u32 (rp->response);

      vl_msg_api_handler ((void *) rp);
      break;
    }
  return (rv);
}

static void
vl_api_memclnt_delete_reply_t_handler (vl_api_memclnt_delete_reply_t * mp)
{
  void *oldheap;
  api_main_t *am = &api_main;

  pthread_mutex_lock (&am->vlib_rp->mutex);
  oldheap = svm_push_data_heap (am->vlib_rp);
  svm_queue_free (am->vl_input_queue);
  pthread_mutex_unlock (&am->vlib_rp->mutex);
  svm_pop_heap (oldheap);

  am->my_client_index = ~0;
  am->my_registration = 0;
  am->vl_input_queue = 0;
}

int
vl_client_disconnect (void)
{
  vl_api_memclnt_delete_t *mp;
  vl_api_memclnt_delete_reply_t *rp;
  svm_queue_t *vl_input_queue;
  vl_shmem_hdr_t *shmem_hdr;
  time_t begin;
  api_main_t *am = &api_main;

  ASSERT (am->vlib_rp);
  shmem_hdr = am->shmem_hdr;
  ASSERT (shmem_hdr && shmem_hdr->vl_input_queue);

  vl_input_queue = am->vl_input_queue;

  mp = vl_msg_api_alloc (sizeof (vl_api_memclnt_delete_t));
  memset (mp, 0, sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_MEMCLNT_DELETE);
  mp->index = am->my_client_index;
  mp->handle = (uword) am->my_registration;

  vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & mp);

  /*
   * Have to be careful here, in case the client is disconnecting
   * because e.g. the vlib process died, or is unresponsive.
   */
  begin = time (0);
  while (1)
    {
      time_t now;

      now = time (0);

      if (now >= (begin + 2))
	{
	  clib_warning ("peer unresponsive, give up");
	  am->my_client_index = ~0;
	  am->my_registration = 0;
	  am->shmem_hdr = 0;
	  return -1;
	}
      if (svm_queue_sub (vl_input_queue, (u8 *) & rp, SVM_Q_NOWAIT, 0) < 0)
	continue;

      /* drain the queue */
      if (ntohs (rp->_vl_msg_id) != VL_API_MEMCLNT_DELETE_REPLY)
	{
	  clib_warning ("queue drain: %d", ntohs (rp->_vl_msg_id));
	  vl_msg_api_handler ((void *) rp);
	  continue;
	}
      vl_msg_api_handler ((void *) rp);
      break;
    }

  vl_api_name_and_crc_free ();
  return 0;
}

/**
 * Stave off the binary API dead client reaper
 * Only sent to inactive clients
 */
static void
vl_api_memclnt_keepalive_t_handler (vl_api_memclnt_keepalive_t * mp)
{
  vl_api_memclnt_keepalive_reply_t *rmp;
  api_main_t *am;
  vl_shmem_hdr_t *shmem_hdr;

  am = &api_main;
  shmem_hdr = am->shmem_hdr;

  rmp = vl_msg_api_alloc_as_if_client (sizeof (*rmp));
  memset (rmp, 0, sizeof (*rmp));
  rmp->_vl_msg_id = ntohs (VL_API_MEMCLNT_KEEPALIVE_REPLY);
  rmp->context = mp->context;
  vl_msg_api_send_shmem (shmem_hdr->vl_input_queue, (u8 *) & rmp);
}

#define foreach_api_msg                         \
_(RX_THREAD_EXIT, rx_thread_exit)               \
_(MEMCLNT_CREATE_REPLY, memclnt_create_reply)   \
_(MEMCLNT_DELETE_REPLY, memclnt_delete_reply)	\
_(MEMCLNT_KEEPALIVE, memclnt_keepalive)

void
vl_client_install_client_message_handlers (void)
{

#define _(N,n)                                                  \
    vl_msg_api_set_handlers(VL_API_##N, #n,                     \
                            vl_api_##n##_t_handler,             \
                            noop_handler,                       \
                            vl_api_##n##_t_endian,              \
                            vl_api_##n##_t_print,               \
                            sizeof(vl_api_##n##_t), 1);
  foreach_api_msg;
#undef _
}

int
vl_client_api_map (const char *region_name)
{
  int rv;

  if ((rv = vl_map_shmem (region_name, 0 /* is_vlib */ )) < 0)
    return rv;

  vl_client_install_client_message_handlers ();
  return 0;
}

void
vl_client_api_unmap (void)
{
  vl_unmap_shmem_client ();
}

u8
vl_mem_client_is_connected (void)
{
  return (memory_client_main.connected_to_vlib != 0);
}

static int
connect_to_vlib_internal (const char *svm_name,
			  const char *client_name,
			  int rx_queue_size, int want_pthread, int do_map)
{
  int rv = 0;
  memory_client_main_t *mm = &memory_client_main;

  if (do_map && (rv = vl_client_api_map (svm_name)))
    {
      clib_warning ("vl_client_api map rv %d", rv);
      return rv;
    }

  if (vl_client_connect (client_name, 0 /* punt quota */ ,
			 rx_queue_size /* input queue */ ) < 0)
    {
      vl_client_api_unmap ();
      return -1;
    }

  /* Start the rx queue thread */

  if (want_pthread)
    {
      rv = pthread_create (&mm->rx_thread_handle,
			   NULL /*attr */ , rx_thread_fn, 0);
      if (rv)
	clib_warning ("pthread_create returned %d", rv);
    }

  mm->connected_to_vlib = 1;
  return 0;
}

int
vl_client_connect_to_vlib (const char *svm_name,
			   const char *client_name, int rx_queue_size)
{
  return connect_to_vlib_internal (svm_name, client_name, rx_queue_size,
				   1 /* want pthread */ ,
				   1 /* do map */ );
}

int
vl_client_connect_to_vlib_no_rx_pthread (const char *svm_name,
					 const char *client_name,
					 int rx_queue_size)
{
  return connect_to_vlib_internal (svm_name, client_name, rx_queue_size,
				   0 /* want pthread */ ,
				   1 /* do map */ );
}

int
vl_client_connect_to_vlib_no_map (const char *svm_name,
				  const char *client_name, int rx_queue_size)
{
  return connect_to_vlib_internal (svm_name, client_name, rx_queue_size,
				   1 /* want pthread */ ,
				   0 /* dont map */ );
}

static void
disconnect_from_vlib_internal (u8 do_unmap)
{
  memory_client_main_t *mm = &memory_client_main;
  api_main_t *am = &api_main;
  uword junk;

  if (mm->rx_thread_jmpbuf_valid)
    {
      vl_api_rx_thread_exit_t *ep;
      ep = vl_msg_api_alloc (sizeof (*ep));
      ep->_vl_msg_id = ntohs (VL_API_RX_THREAD_EXIT);
      vl_msg_api_send_shmem (am->vl_input_queue, (u8 *) & ep);
      pthread_join (mm->rx_thread_handle, (void **) &junk);
    }
  if (mm->connected_to_vlib)
    {
      vl_client_disconnect ();
      if (do_unmap)
	vl_client_api_unmap ();
    }
  memset (mm, 0, sizeof (*mm));
}

void
vl_client_disconnect_from_vlib (void)
{
  disconnect_from_vlib_internal (1);
}

void
vl_client_disconnect_from_vlib_no_unmap (void)
{
  disconnect_from_vlib_internal (0);
}

static void vl_api_get_first_msg_id_reply_t_handler
  (vl_api_get_first_msg_id_reply_t * mp)
{
  memory_client_main_t *mm = &memory_client_main;
  i32 retval = ntohl (mp->retval);

  mm->first_msg_id_reply = (retval >= 0) ? ntohs (mp->first_msg_id) : ~0;
  mm->first_msg_id_reply_ready = 1;
}

u16
vl_client_get_first_plugin_msg_id (const char *plugin_name)
{
  vl_api_get_first_msg_id_t *mp;
  api_main_t *am = &api_main;
  memory_client_main_t *mm = &memory_client_main;
  f64 timeout;
  void *old_handler;
  clib_time_t clib_time;
  u16 rv = ~0;

  if (strlen (plugin_name) + 1 > sizeof (mp->name))
    return (rv);

  memset (&clib_time, 0, sizeof (clib_time));
  clib_time_init (&clib_time);

  /* Push this plugin's first_msg_id_reply handler */
  old_handler = am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY];
  am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = (void *)
    vl_api_get_first_msg_id_reply_t_handler;

  /* Ask the data-plane for the message-ID base of the indicated plugin */
  mm->first_msg_id_reply_ready = 0;

  /* Not using shm client */
  if (!am->my_registration)
    {
      mp = vl_socket_client_msg_alloc (sizeof (*mp));
      memset (mp, 0, sizeof (*mp));
      mp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID);
      mp->client_index = am->my_client_index;
      strncpy ((char *) mp->name, plugin_name, sizeof (mp->name) - 1);

      if (vl_socket_client_write () <= 0)
	goto sock_err;
      if (vl_socket_client_read (1))
	goto sock_err;

      if (mm->first_msg_id_reply_ready == 1)
	{
	  rv = mm->first_msg_id_reply;
	  goto result;
	}

    sock_err:
      /* Restore old handler */
      am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = old_handler;

      return -1;
    }
  else
    {
      mp = vl_msg_api_alloc (sizeof (*mp));
      memset (mp, 0, sizeof (*mp));
      mp->_vl_msg_id = ntohs (VL_API_GET_FIRST_MSG_ID);
      mp->client_index = am->my_client_index;
      strncpy ((char *) mp->name, plugin_name, sizeof (mp->name) - 1);

      vl_msg_api_send_shmem (am->shmem_hdr->vl_input_queue, (u8 *) & mp);

      /* Synchronously wait for the answer */
      timeout = clib_time_now (&clib_time) + 1.0;
      while (clib_time_now (&clib_time) < timeout)
	{
	  if (mm->first_msg_id_reply_ready == 1)
	    {
	      rv = mm->first_msg_id_reply;
	      goto result;
	    }
	}
      /* Restore old handler */
      am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = old_handler;

      return rv;
    }

result:

  /* Restore the old handler */
  am->msg_handlers[VL_API_GET_FIRST_MSG_ID_REPLY] = old_handler;

  if (rv == (u16) ~ 0)
    clib_warning ("plugin '%s' not registered", plugin_name);

  return rv;
}

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */