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zebra_mlag.c
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zebra_mlag.c
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/* Zebra Mlag Code.
* Copyright (C) 2018 Cumulus Networks, Inc.
* Donald Sharp
*
* This file is part of FRR.
*
* FRR is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* FRR is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with FRR; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include "zebra.h"
#include "command.h"
#include "hook.h"
#include "frr_pthread.h"
#include "mlag.h"
#include "zebra/zebra_mlag.h"
#include "zebra/zebra_router.h"
#include "zebra/zebra_memory.h"
#include "zebra/zapi_msg.h"
#include "zebra/debug.h"
#ifndef VTYSH_EXTRACT_PL
#include "zebra/zebra_mlag_clippy.c"
#endif
DEFINE_HOOK(zebra_mlag_private_write_data,
(uint8_t *data, uint32_t len), (data, len))
DEFINE_HOOK(zebra_mlag_private_monitor_state, (), ())
DEFINE_HOOK(zebra_mlag_private_open_channel, (), ())
DEFINE_HOOK(zebra_mlag_private_close_channel, (), ())
DEFINE_HOOK(zebra_mlag_private_cleanup_data, (), ())
#define ZEBRA_MLAG_METADATA_LEN 4
#define ZEBRA_MLAG_MSG_BCAST 0xFFFFFFFF
uint8_t mlag_wr_buffer[ZEBRA_MLAG_BUF_LIMIT];
uint8_t mlag_rd_buffer[ZEBRA_MLAG_BUF_LIMIT];
uint32_t mlag_rd_buf_offset;
static bool test_mlag_in_progress;
static int zebra_mlag_signal_write_thread(void);
static int zebra_mlag_terminate_pthread(struct thread *event);
static int zebra_mlag_post_data_from_main_thread(struct thread *thread);
static void zebra_mlag_publish_process_state(struct zserv *client,
zebra_message_types_t msg_type);
/**********************MLAG Interaction***************************************/
/*
* API to post the Registration to MLAGD
* MLAG will not process any messages with out the registration
*/
void zebra_mlag_send_register(void)
{
struct stream *s = NULL;
s = stream_new(sizeof(struct mlag_msg));
stream_putl(s, MLAG_REGISTER);
stream_putw(s, MLAG_MSG_NULL_PAYLOAD);
stream_putw(s, MLAG_MSG_NO_BATCH);
stream_fifo_push_safe(zrouter.mlag_info.mlag_fifo, s);
zebra_mlag_signal_write_thread();
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: Enqueued MLAG Register to MLAG Thread ",
__func__);
}
/*
* API to post the De-Registration to MLAGD
* MLAG will not process any messages after the de-registration
*/
void zebra_mlag_send_deregister(void)
{
struct stream *s = NULL;
s = stream_new(sizeof(struct mlag_msg));
stream_putl(s, MLAG_DEREGISTER);
stream_putw(s, MLAG_MSG_NULL_PAYLOAD);
stream_putw(s, MLAG_MSG_NO_BATCH);
stream_fifo_push_safe(zrouter.mlag_info.mlag_fifo, s);
zebra_mlag_signal_write_thread();
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: Enqueued MLAG De-Register to MLAG Thread ",
__func__);
}
/*
* API To handle MLAG Received data
* Decodes the data using protobuf and enqueue to main thread
* main thread publish this to clients based on client subscription
*/
void zebra_mlag_process_mlag_data(uint8_t *data, uint32_t len)
{
struct stream *s = NULL;
struct stream *s1 = NULL;
int msg_type = 0;
s = stream_new(ZEBRA_MAX_PACKET_SIZ);
msg_type = zebra_mlag_protobuf_decode_message(s, data, len);
if (msg_type <= 0) {
/* Something went wrong in decoding */
stream_free(s);
zlog_err("%s: failed to process mlag data-%d, %u", __func__,
msg_type, len);
return;
}
/*
* additional four bytes are for message type
*/
s1 = stream_new(stream_get_endp(s) + ZEBRA_MLAG_METADATA_LEN);
stream_putl(s1, msg_type);
stream_put(s1, s->data, stream_get_endp(s));
thread_add_event(zrouter.master, zebra_mlag_post_data_from_main_thread,
s1, 0, NULL);
stream_free(s);
}
/**********************End of MLAG Interaction********************************/
/************************MLAG Thread Processing*******************************/
/*
* after posting every 'ZEBRA_MLAG_POST_LIMIT' packets, MLAG Thread will be
* yielded to give CPU for other threads
*/
#define ZEBRA_MLAG_POST_LIMIT 100
/*
* This thread reads the clients data from the Global queue and encodes with
* protobuf and pass on to the MLAG socket.
*/
static int zebra_mlag_client_msg_handler(struct thread *event)
{
struct stream *s;
uint32_t wr_count = 0;
uint32_t msg_type = 0;
uint32_t max_count = 0;
int len = 0;
wr_count = stream_fifo_count_safe(zrouter.mlag_info.mlag_fifo);
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(":%s: Processing MLAG write, %u messages in queue",
__func__, wr_count);
max_count = MIN(wr_count, ZEBRA_MLAG_POST_LIMIT);
for (wr_count = 0; wr_count < max_count; wr_count++) {
s = stream_fifo_pop_safe(zrouter.mlag_info.mlag_fifo);
if (!s) {
zlog_debug(":%s: Got a NULL Messages, some thing wrong",
__func__);
break;
}
/*
* Encode the data now
*/
len = zebra_mlag_protobuf_encode_client_data(s, &msg_type);
/*
* write to MCLAGD
*/
if (len > 0) {
hook_call(zebra_mlag_private_write_data,
mlag_wr_buffer, len);
/*
* If message type is De-register, send a signal to main
* thread, so that necessary cleanup will be done by
* main thread.
*/
if (msg_type == MLAG_DEREGISTER) {
thread_add_event(zrouter.master,
zebra_mlag_terminate_pthread,
NULL, 0, NULL);
}
}
stream_free(s);
}
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(":%s: Posted %d messages to MLAGD", __func__,
wr_count);
/*
* Currently there is only message write task is enqueued to this
* thread, yielding was added for future purpose, so that this thread
* can server other tasks also and in case FIFO is empty, this task will
* be schedule when main thread adds some messages
*/
if (wr_count >= ZEBRA_MLAG_POST_LIMIT)
zebra_mlag_signal_write_thread();
return 0;
}
/*
* API to handle the process state.
* In case of Down, Zebra keep monitoring the MLAG state.
* all the state Notifications will be published to clients
*/
void zebra_mlag_handle_process_state(enum zebra_mlag_state state)
{
if (state == MLAG_UP) {
zrouter.mlag_info.connected = true;
zebra_mlag_publish_process_state(NULL, ZEBRA_MLAG_PROCESS_UP);
zebra_mlag_send_register();
} else if (state == MLAG_DOWN) {
zrouter.mlag_info.connected = false;
zebra_mlag_publish_process_state(NULL, ZEBRA_MLAG_PROCESS_DOWN);
hook_call(zebra_mlag_private_monitor_state);
}
}
/***********************End of MLAG Thread processing*************************/
/*************************Multi-entratnt Api's********************************/
/*
* Provider api to signal that work/events are available
* for the Zebra MLAG Write pthread.
* This API is called from 2 pthreads..
* 1) by main thread when client posts a MLAG Message
* 2) by MLAG Thread, in case of yield
* though this api, is called from two threads we don't need any locking
* because Thread task enqueue is thread safe means internally it had
* necessary protection
*/
static int zebra_mlag_signal_write_thread(void)
{
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(":%s: Scheduling MLAG write", __func__);
/*
* This api will be called from Both main & MLAG Threads.
* main thread writes, "zrouter.mlag_info.th_master" only
* during Zebra Init/after MLAG thread is destroyed.
* so it is safe to use without any locking
*/
thread_add_event(zrouter.mlag_info.th_master,
zebra_mlag_client_msg_handler, NULL, 0,
&zrouter.mlag_info.t_write);
return 0;
}
/*
* API will be used to publish the MLAG state to interested clients
* In case client is passed, state is posted only for that client,
* otherwise to all interested clients
* this api can be called from two threads.
* 1) from main thread: when client is passed
* 2) from MLAG Thread: when client is NULL
*
* In second case, to avoid global data access data will be post to Main
* thread, so that actual posting to clients will happen from Main thread.
*/
static void zebra_mlag_publish_process_state(struct zserv *client,
zebra_message_types_t msg_type)
{
struct stream *s;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: Publishing MLAG process state:%s to %s Client",
__func__,
(msg_type == ZEBRA_MLAG_PROCESS_UP) ? "UP" : "DOWN",
(client) ? "one" : "all");
if (client) {
s = stream_new(ZEBRA_HEADER_SIZE);
zclient_create_header(s, msg_type, VRF_DEFAULT);
zserv_send_message(client, s);
return;
}
/*
* additional four bytes are for mesasge type
*/
s = stream_new(ZEBRA_HEADER_SIZE + ZEBRA_MLAG_METADATA_LEN);
stream_putl(s, ZEBRA_MLAG_MSG_BCAST);
zclient_create_header(s, msg_type, VRF_DEFAULT);
thread_add_event(zrouter.master, zebra_mlag_post_data_from_main_thread,
s, 0, NULL);
}
/**************************End of Multi-entrant Apis**************************/
/***********************Zebra Main thread processing**************************/
/*
* To avoid data corruption, messages will be post to clients only from
* main thread, because for that access was needed for clients list.
* so instead of forcing the locks, messages will be posted from main thread.
*/
static int zebra_mlag_post_data_from_main_thread(struct thread *thread)
{
struct stream *s = THREAD_ARG(thread);
struct stream *zebra_s = NULL;
struct listnode *node;
struct zserv *client;
uint32_t msg_type = 0;
uint32_t msg_len = 0;
if (!s)
return -1;
STREAM_GETL(s, msg_type);
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"%s: Posting MLAG data for msg_type:0x%x to interested cleints",
__func__, msg_type);
msg_len = s->endp - ZEBRA_MLAG_METADATA_LEN;
for (ALL_LIST_ELEMENTS_RO(zrouter.client_list, node, client)) {
if (client->mlag_updates_interested == true) {
if (msg_type != ZEBRA_MLAG_MSG_BCAST
&& !CHECK_FLAG(client->mlag_reg_mask1,
(1 << msg_type))) {
continue;
}
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"%s: Posting MLAG data of length-%d to client:%d ",
__func__, msg_len, client->proto);
zebra_s = stream_new(msg_len);
STREAM_GET(zebra_s->data, s, msg_len);
zebra_s->endp = msg_len;
stream_putw_at(zebra_s, 0, msg_len);
/*
* This stream will be enqueued to client_obuf, it will
* be freed after posting to client socket.
*/
zserv_send_message(client, zebra_s);
zebra_s = NULL;
}
}
stream_free(s);
return 0;
stream_failure:
stream_free(s);
if (zebra_s)
stream_free(zebra_s);
return 0;
}
/*
* Start the MLAG Thread, this will be used to write client data on to
* MLAG Process and to read the data from MLAG and post to cleints.
* when all clients are un-registered, this Thread will be
* suspended.
*/
static void zebra_mlag_spawn_pthread(void)
{
/* Start MLAG write pthread */
struct frr_pthread_attr pattr = {.start =
frr_pthread_attr_default.start,
.stop = frr_pthread_attr_default.stop};
zrouter.mlag_info.zebra_pth_mlag =
frr_pthread_new(&pattr, "Zebra MLAG thread", "Zebra MLAG");
zrouter.mlag_info.th_master = zrouter.mlag_info.zebra_pth_mlag->master;
/* Enqueue an initial event to the Newly spawn MLAG pthread */
zebra_mlag_signal_write_thread();
frr_pthread_run(zrouter.mlag_info.zebra_pth_mlag, NULL);
}
/*
* all clients are un-registered for MLAG Updates, terminate the
* MLAG write thread
*/
static int zebra_mlag_terminate_pthread(struct thread *event)
{
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Zebra MLAG write thread terminate called");
if (zrouter.mlag_info.clients_interested_cnt) {
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"Zebra MLAG: still some clients are interested");
return 0;
}
frr_pthread_stop(zrouter.mlag_info.zebra_pth_mlag, NULL);
/* Destroy pthread */
frr_pthread_destroy(zrouter.mlag_info.zebra_pth_mlag);
zrouter.mlag_info.zebra_pth_mlag = NULL;
zrouter.mlag_info.th_master = NULL;
zrouter.mlag_info.t_read = NULL;
zrouter.mlag_info.t_write = NULL;
/*
* Send Notification to clean private data
*/
hook_call(zebra_mlag_private_cleanup_data);
return 0;
}
/*
* API to register zebra client for MLAG Updates
*/
void zebra_mlag_client_register(ZAPI_HANDLER_ARGS)
{
struct stream *s;
uint32_t reg_mask = 0;
int rc = 0;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Received MLAG Registration from client-proto:%d",
client->proto);
/* Get input stream. */
s = msg;
/* Get data. */
STREAM_GETL(s, reg_mask);
if (client->mlag_updates_interested == true) {
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"Client is registered, existing mask: 0x%x, new mask: 0x%x",
client->mlag_reg_mask1, reg_mask);
if (client->mlag_reg_mask1 != reg_mask)
client->mlag_reg_mask1 = reg_mask;
/*
* Client might missed MLAG-UP Notification, post-it again
*/
zebra_mlag_publish_process_state(client, ZEBRA_MLAG_PROCESS_UP);
return;
}
client->mlag_updates_interested = true;
client->mlag_reg_mask1 = reg_mask;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Registering for MLAG Updates with mask: 0x%x, ",
client->mlag_reg_mask1);
zrouter.mlag_info.clients_interested_cnt++;
if (zrouter.mlag_info.clients_interested_cnt == 1) {
/*
* First-client for MLAG Updates,open the communication channel
* with MLAG
*/
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"First client, opening the channel with MLAG");
zebra_mlag_spawn_pthread();
rc = hook_call(zebra_mlag_private_open_channel);
if (rc < 0) {
/*
* For some reason, zebra not able to open the
* comm-channel with MLAG, so post MLAG-DOWN to client.
* later when the channel is open, zebra will send
* MLAG-UP
*/
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"Fail to open channel with MLAG,rc:%d, post Proto-down",
rc);
zebra_mlag_publish_process_state(
client, ZEBRA_MLAG_PROCESS_DOWN);
}
}
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Client Registered successfully for MLAG Updates");
if (zrouter.mlag_info.connected == true)
zebra_mlag_publish_process_state(client, ZEBRA_MLAG_PROCESS_UP);
stream_failure:
return;
}
/*
* API to un-register for MLAG Updates
*/
void zebra_mlag_client_unregister(ZAPI_HANDLER_ARGS)
{
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Received MLAG De-Registration from client-proto:%d",
client->proto);
if (client->mlag_updates_interested == false)
/* Unexpected */
return;
client->mlag_updates_interested = false;
client->mlag_reg_mask1 = 0;
zrouter.mlag_info.clients_interested_cnt--;
if (zrouter.mlag_info.clients_interested_cnt == 0) {
/*
* No-client is interested for MLAG Updates,close the
* communication channel with MLAG
*/
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Last client for MLAG, close the channel ");
/*
* Clean up flow:
* =============
* 1) main thread calls socket close which posts De-register
* to MLAG write thread
* 2) after MLAG write thread posts De-register it sends a
* signal back to main thread to do the thread cleanup
* this was mainly to make sure De-register is posted to MCLAGD.
*/
hook_call(zebra_mlag_private_close_channel);
}
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"Client De-Registered successfully for MLAG Updates");
}
/*
* Does following things.
* 1) allocated new local stream, and copies the client data and enqueue
* to MLAG Thread
* 2) MLAG Thread after dequeing, encode the client data using protobuf
* and write on to MLAG
*/
void zebra_mlag_forward_client_msg(ZAPI_HANDLER_ARGS)
{
struct stream *zebra_s;
struct stream *mlag_s;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Received Client MLAG Data from client-proto:%d",
client->proto);
/* Get input stream. */
zebra_s = msg;
mlag_s = stream_new(zebra_s->endp);
/*
* Client data is | Zebra Header + MLAG Data |
* we need to enqueue only the MLAG data, skipping Zebra Header
*/
stream_put(mlag_s, zebra_s->data + zebra_s->getp,
STREAM_READABLE(zebra_s));
stream_fifo_push_safe(zrouter.mlag_info.mlag_fifo, mlag_s);
zebra_mlag_signal_write_thread();
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: Enqueued Client:%d data to MLAG Thread ",
__func__, client->proto);
}
/***********************End of Zebra Main thread processing*************/
enum mlag_role zebra_mlag_get_role(void)
{
return zrouter.mlag_info.role;
}
DEFUN_HIDDEN (show_mlag,
show_mlag_cmd,
"show zebra mlag",
SHOW_STR
ZEBRA_STR
"The mlag role on this machine\n")
{
char buf[MLAG_ROLE_STRSIZE];
vty_out(vty, "MLag is configured to: %s\n",
mlag_role2str(zrouter.mlag_info.role, buf, sizeof(buf)));
return CMD_SUCCESS;
}
DEFPY_HIDDEN(test_mlag, test_mlag_cmd,
"test zebra mlag <none$none|primary$primary|secondary$secondary>",
"Test code\n"
ZEBRA_STR
"Modify the Mlag state\n"
"Mlag is not setup on the machine\n"
"Mlag is setup to be primary\n"
"Mlag is setup to be the secondary\n")
{
enum mlag_role orig = zrouter.mlag_info.role;
char buf1[MLAG_ROLE_STRSIZE], buf2[MLAG_ROLE_STRSIZE];
if (none)
zrouter.mlag_info.role = MLAG_ROLE_NONE;
if (primary)
zrouter.mlag_info.role = MLAG_ROLE_PRIMARY;
if (secondary)
zrouter.mlag_info.role = MLAG_ROLE_SECONDARY;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("Test: Changing role from %s to %s",
mlag_role2str(orig, buf1, sizeof(buf1)),
mlag_role2str(orig, buf2, sizeof(buf2)));
if (orig != zrouter.mlag_info.role) {
zsend_capabilities_all_clients();
if (zrouter.mlag_info.role != MLAG_ROLE_NONE) {
if (zrouter.mlag_info.clients_interested_cnt == 0
&& test_mlag_in_progress == false) {
if (zrouter.mlag_info.zebra_pth_mlag == NULL)
zebra_mlag_spawn_pthread();
zrouter.mlag_info.clients_interested_cnt++;
test_mlag_in_progress = true;
hook_call(zebra_mlag_private_open_channel);
}
} else {
if (test_mlag_in_progress == true) {
test_mlag_in_progress = false;
zrouter.mlag_info.clients_interested_cnt--;
hook_call(zebra_mlag_private_close_channel);
}
}
}
return CMD_SUCCESS;
}
void zebra_mlag_init(void)
{
install_element(VIEW_NODE, &show_mlag_cmd);
install_element(ENABLE_NODE, &test_mlag_cmd);
/*
* Intialiaze the MLAG Global variables
* write thread will be created during actual registration with MCLAG
*/
zrouter.mlag_info.clients_interested_cnt = 0;
zrouter.mlag_info.connected = false;
zrouter.mlag_info.timer_running = false;
zrouter.mlag_info.mlag_fifo = stream_fifo_new();
zrouter.mlag_info.zebra_pth_mlag = NULL;
zrouter.mlag_info.th_master = NULL;
zrouter.mlag_info.t_read = NULL;
zrouter.mlag_info.t_write = NULL;
test_mlag_in_progress = false;
zebra_mlag_reset_read_buffer();
}
void zebra_mlag_terminate(void)
{
}
/*
*
* ProtoBuf Encoding APIs
*/
#ifdef HAVE_PROTOBUF
DEFINE_MTYPE_STATIC(ZEBRA, MLAG_PBUF, "ZEBRA MLAG PROTOBUF")
int zebra_mlag_protobuf_encode_client_data(struct stream *s, uint32_t *msg_type)
{
ZebraMlagHeader hdr = ZEBRA_MLAG__HEADER__INIT;
struct mlag_msg mlag_msg;
uint8_t tmp_buf[ZEBRA_MLAG_BUF_LIMIT];
int len = 0;
int n_len = 0;
int rc = 0;
char buf[ZLOG_FILTER_LENGTH_MAX];
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: Entering..", __func__);
rc = mlag_lib_decode_mlag_hdr(s, &mlag_msg);
if (rc)
return rc;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: Mlag ProtoBuf encoding of message:%s, len:%d",
__func__,
mlag_lib_msgid_to_str(mlag_msg.msg_type, buf,
sizeof(buf)),
mlag_msg.data_len);
*msg_type = mlag_msg.msg_type;
switch (mlag_msg.msg_type) {
case MLAG_MROUTE_ADD: {
struct mlag_mroute_add msg;
ZebraMlagMrouteAdd pay_load = ZEBRA_MLAG_MROUTE_ADD__INIT;
uint32_t vrf_name_len = 0;
rc = mlag_lib_decode_mroute_add(s, &msg);
if (rc)
return rc;
vrf_name_len = strlen(msg.vrf_name) + 1;
pay_load.vrf_name = XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load.vrf_name, msg.vrf_name, vrf_name_len);
pay_load.source_ip = msg.source_ip;
pay_load.group_ip = msg.group_ip;
pay_load.cost_to_rp = msg.cost_to_rp;
pay_load.owner_id = msg.owner_id;
pay_load.am_i_dr = msg.am_i_dr;
pay_load.am_i_dual_active = msg.am_i_dual_active;
pay_load.vrf_id = msg.vrf_id;
if (msg.owner_id == MLAG_OWNER_INTERFACE) {
vrf_name_len = strlen(msg.intf_name) + 1;
pay_load.intf_name =
XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load.intf_name, msg.intf_name,
vrf_name_len);
}
len = zebra_mlag_mroute_add__pack(&pay_load, tmp_buf);
XFREE(MTYPE_MLAG_PBUF, pay_load.vrf_name);
if (msg.owner_id == MLAG_OWNER_INTERFACE)
XFREE(MTYPE_MLAG_PBUF, pay_load.intf_name);
} break;
case MLAG_MROUTE_DEL: {
struct mlag_mroute_del msg;
ZebraMlagMrouteDel pay_load = ZEBRA_MLAG_MROUTE_DEL__INIT;
uint32_t vrf_name_len = 0;
rc = mlag_lib_decode_mroute_del(s, &msg);
if (rc)
return rc;
vrf_name_len = strlen(msg.vrf_name) + 1;
pay_load.vrf_name = XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load.vrf_name, msg.vrf_name, vrf_name_len);
pay_load.source_ip = msg.source_ip;
pay_load.group_ip = msg.group_ip;
pay_load.owner_id = msg.owner_id;
pay_load.vrf_id = msg.vrf_id;
if (msg.owner_id == MLAG_OWNER_INTERFACE) {
vrf_name_len = strlen(msg.intf_name) + 1;
pay_load.intf_name =
XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load.intf_name, msg.intf_name,
vrf_name_len);
}
len = zebra_mlag_mroute_del__pack(&pay_load, tmp_buf);
XFREE(MTYPE_MLAG_PBUF, pay_load.vrf_name);
if (msg.owner_id == MLAG_OWNER_INTERFACE)
XFREE(MTYPE_MLAG_PBUF, pay_load.intf_name);
} break;
case MLAG_MROUTE_ADD_BULK: {
struct mlag_mroute_add msg;
ZebraMlagMrouteAddBulk Bulk_msg =
ZEBRA_MLAG_MROUTE_ADD_BULK__INIT;
ZebraMlagMrouteAdd **pay_load = NULL;
int i;
bool cleanup = false;
Bulk_msg.n_mroute_add = mlag_msg.msg_cnt;
pay_load = XMALLOC(MTYPE_MLAG_PBUF, sizeof(ZebraMlagMrouteAdd *)
* mlag_msg.msg_cnt);
for (i = 0; i < mlag_msg.msg_cnt; i++) {
uint32_t vrf_name_len = 0;
rc = mlag_lib_decode_mroute_add(s, &msg);
if (rc) {
cleanup = true;
break;
}
pay_load[i] = XMALLOC(MTYPE_MLAG_PBUF,
sizeof(ZebraMlagMrouteAdd));
zebra_mlag_mroute_add__init(pay_load[i]);
vrf_name_len = strlen(msg.vrf_name) + 1;
pay_load[i]->vrf_name =
XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load[i]->vrf_name, msg.vrf_name,
vrf_name_len);
pay_load[i]->source_ip = msg.source_ip;
pay_load[i]->group_ip = msg.group_ip;
pay_load[i]->cost_to_rp = msg.cost_to_rp;
pay_load[i]->owner_id = msg.owner_id;
pay_load[i]->am_i_dr = msg.am_i_dr;
pay_load[i]->am_i_dual_active = msg.am_i_dual_active;
pay_load[i]->vrf_id = msg.vrf_id;
if (msg.owner_id == MLAG_OWNER_INTERFACE) {
vrf_name_len = strlen(msg.intf_name) + 1;
pay_load[i]->intf_name =
XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load[i]->intf_name, msg.intf_name,
vrf_name_len);
}
}
if (cleanup == false) {
Bulk_msg.mroute_add = pay_load;
len = zebra_mlag_mroute_add_bulk__pack(&Bulk_msg,
tmp_buf);
}
for (i = 0; i < mlag_msg.msg_cnt; i++) {
if (pay_load[i]->vrf_name)
XFREE(MTYPE_MLAG_PBUF, pay_load[i]->vrf_name);
if (pay_load[i]->owner_id == MLAG_OWNER_INTERFACE
&& pay_load[i]->intf_name)
XFREE(MTYPE_MLAG_PBUF, pay_load[i]->intf_name);
if (pay_load[i])
XFREE(MTYPE_MLAG_PBUF, pay_load[i]);
}
XFREE(MTYPE_MLAG_PBUF, pay_load);
if (cleanup == true)
return -1;
} break;
case MLAG_MROUTE_DEL_BULK: {
struct mlag_mroute_del msg;
ZebraMlagMrouteDelBulk Bulk_msg =
ZEBRA_MLAG_MROUTE_DEL_BULK__INIT;
ZebraMlagMrouteDel **pay_load = NULL;
int i;
bool cleanup = false;
Bulk_msg.n_mroute_del = mlag_msg.msg_cnt;
pay_load = XMALLOC(MTYPE_MLAG_PBUF, sizeof(ZebraMlagMrouteDel *)
* mlag_msg.msg_cnt);
for (i = 0; i < mlag_msg.msg_cnt; i++) {
uint32_t vrf_name_len = 0;
rc = mlag_lib_decode_mroute_del(s, &msg);
if (rc) {
cleanup = true;
break;
}
pay_load[i] = XMALLOC(MTYPE_MLAG_PBUF,
sizeof(ZebraMlagMrouteDel));
zebra_mlag_mroute_del__init(pay_load[i]);
vrf_name_len = strlen(msg.vrf_name) + 1;
pay_load[i]->vrf_name =
XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load[i]->vrf_name, msg.vrf_name,
vrf_name_len);
pay_load[i]->source_ip = msg.source_ip;
pay_load[i]->group_ip = msg.group_ip;
pay_load[i]->owner_id = msg.owner_id;
pay_load[i]->vrf_id = msg.vrf_id;
if (msg.owner_id == MLAG_OWNER_INTERFACE) {
vrf_name_len = strlen(msg.intf_name) + 1;
pay_load[i]->intf_name =
XMALLOC(MTYPE_MLAG_PBUF, vrf_name_len);
strlcpy(pay_load[i]->intf_name, msg.intf_name,
vrf_name_len);
}
}
if (!cleanup) {
Bulk_msg.mroute_del = pay_load;
len = zebra_mlag_mroute_del_bulk__pack(&Bulk_msg,
tmp_buf);
}
for (i = 0; i < mlag_msg.msg_cnt; i++) {
if (pay_load[i]->vrf_name)
XFREE(MTYPE_MLAG_PBUF, pay_load[i]->vrf_name);
if (pay_load[i]->owner_id == MLAG_OWNER_INTERFACE
&& pay_load[i]->intf_name)
XFREE(MTYPE_MLAG_PBUF, pay_load[i]->intf_name);
if (pay_load[i])
XFREE(MTYPE_MLAG_PBUF, pay_load[i]);
}
XFREE(MTYPE_MLAG_PBUF, pay_load);
if (cleanup)
return -1;
} break;
default:
break;
}
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: length of Mlag ProtoBuf encoded message:%s, %d",
__func__,
mlag_lib_msgid_to_str(mlag_msg.msg_type, buf,
sizeof(buf)),
len);
hdr.type = (ZebraMlagHeader__MessageType)mlag_msg.msg_type;
if (len != 0) {
hdr.data.len = len;
hdr.data.data = XMALLOC(MTYPE_MLAG_PBUF, len);
memcpy(hdr.data.data, tmp_buf, len);
}
/*
* ProtoBuf Infra will not support to demarc the pointers whem multiple
* messages are posted inside a single Buffer.
* 2 -solutions exist to solve this
* 1. add Unenoced length at the beginning of every message, this will
* be used to point to next message in the buffer
* 2. another solution is defining all messages insides another message
* But this will permit only 32 messages. this can be extended with
* multiple levels.
* for simplicity we are going with solution-1.
*/
len = zebra_mlag__header__pack(&hdr,
(mlag_wr_buffer + ZEBRA_MLAG_LEN_SIZE));
n_len = htonl(len);
memcpy(mlag_wr_buffer, &n_len, ZEBRA_MLAG_LEN_SIZE);
len += ZEBRA_MLAG_LEN_SIZE;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug(
"%s: length of Mlag ProtoBuf message:%s with Header %d",
__func__,
mlag_lib_msgid_to_str(mlag_msg.msg_type, buf,
sizeof(buf)),
len);
if (hdr.data.data)
XFREE(MTYPE_MLAG_PBUF, hdr.data.data);
return len;
}
int zebra_mlag_protobuf_decode_message(struct stream *s, uint8_t *data,
uint32_t len)
{
uint32_t msg_type;
ZebraMlagHeader *hdr;
char buf[80];
hdr = zebra_mlag__header__unpack(NULL, len, data);
if (hdr == NULL)
return -1;
/*
* ADD The MLAG Header
*/
zclient_create_header(s, ZEBRA_MLAG_FORWARD_MSG, VRF_DEFAULT);
msg_type = hdr->type;
if (IS_ZEBRA_DEBUG_MLAG)
zlog_debug("%s: Mlag ProtoBuf decoding of message:%s", __func__,
mlag_lib_msgid_to_str(msg_type, buf, 80));
/*
* Internal MLAG Message-types & MLAG.proto message types should
* always match, otherwise there can be decoding errors
* To avoid exposing clients with Protobuf flags, using internal
* message-types
*/
stream_putl(s, hdr->type);
if (hdr->data.len == 0) {
/* NULL Payload */
stream_putw(s, MLAG_MSG_NULL_PAYLOAD);
/* No Batching */
stream_putw(s, MLAG_MSG_NO_BATCH);
} else {
switch (msg_type) {
case ZEBRA_MLAG__HEADER__MESSAGE_TYPE__ZEBRA_MLAG_STATUS_UPDATE: {
ZebraMlagStatusUpdate *msg = NULL;
msg = zebra_mlag_status_update__unpack(
NULL, hdr->data.len, hdr->data.data);
if (msg == NULL) {
zebra_mlag__header__free_unpacked(hdr, NULL);
return -1;
}
/* Payload len */
stream_putw(s, sizeof(struct mlag_status));
/* No Batching */
stream_putw(s, MLAG_MSG_NO_BATCH);
/* Actual Data */
stream_put(s, msg->peerlink, INTERFACE_NAMSIZ);
stream_putl(s, msg->my_role);