I am working with dpdk-stable-18.05.1 on Linux with an Intel X710 NIC.
The above NIC is capable of sending a packet size up to 9000 Bytes. My application is not able to send a packet size of more than 1500. Here is my code:
const struct rte_eth_conf default_port_conf = { .rxmode = { .max_rx_pkt_len = 9000, .offloads = DEV_RX_OFFLOAD_JUMBO_FRAME, .jumbo_frame = 1,}
.txmode = { .offloads = DEV_TX_OFFLOAD_MULTI_SEGS, } }
I am trying to send the IPV4 packet size of 8192Bytes but on the RX side, we are getting 2048Bytes.
(sample pcap is attached).
I also tried with rte_eth_dev_set_mtu(pid, 9000); But no luck.
Anything if I am missing please let me know.
Intel NIC x710 has no issues in supporting multi-segmented Jumbo frames. This can be easily verified using DPDK 18.11.7 LTS (always use LTS for better support and fixes) and DPDK example skeleton.
To enable multi-segmented JUMBO frames please change the port_conf to
static const struct rte_eth_conf port_conf_default = {
.rxmode = {
.max_rx_pkt_len = 9000,
.split_hdr_size = 0,
.offloads = (DEV_RX_OFFLOAD_JUMBO_FRAME),
},
.txmode = {
.mq_mode = ETH_MQ_TX_NONE,
.offloads = (DEV_TX_OFFLOAD_IPV4_CKSUM |
DEV_TX_OFFLOAD_MULTI_SEGS),
},
};
The only conflicting configuration is using jumbo_frame = 1 along with DEV_RX_OFFLOAD_JUMBO_FRAME. As per DPDK releases (18.11 LTS) it is recommended to use DEV_RX_OFFLOAD_JUMBO_FRAME as jumbo_frame is deprecated.
Hence the assumption of x710 NIC not supporting Multi-segmented Jumbo frames is incorrect.
CMD:
# ./build/basicfwd -w 0000:08:00.0 -w 0000:08:00.1 -w 0000:08:00.2 -w 0000:08:00.3
EAL: Detected 88 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'VA'
EAL: Probing VFIO support...
EAL: VFIO support initialized
EAL: PCI device 0000:08:00.0 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: using IOMMU type 1 (Type 1)
EAL: PCI device 0000:08:00.1 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:08:00.2 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
EAL: PCI device 0000:08:00.3 on NUMA socket 0
EAL: probe driver: 8086:1572 net_i40e
Port 0 MAC: 3c fd fe 9f 3a 00
Port 1 MAC: 3c fd fe 9f 3a 01
Port 2 MAC: 3c fd fe 9f 3a 02
Port 3 MAC: 3c fd fe 9f 3a 03
WARNING: Too many lcores enabled. Only 1 used.
Core 0 forwarding packets. [Ctrl+C to quit]
Related
I use the server example in apps to simulate BACNET MS/TP SERVER, by modifying the environment variable to set the baud rate 38400, MAC address 0x78.
The operation effect is as follows：
/var/user/app/device_supervisor # ./bacserv 20000
BACnet Server Demo
BACnet Stack Version 1.0.0
BACnet Device ID: 20000
Max APDU: 480
pyh defined MSTP
MS/TP Interface: /dev/ttyO3
RS485: Initializing /dev/ttyO3 at Baud Rate 38400=success!
MS/TP MAC: 78
MS/TP Max_Master: 7F
MS/TP Max_Info_Frames: 1
I use the readprop example in apps to simulate the BACNET MS/TP CLIENT, by modifying the environment variable to set the baud rate of 38400, MAC address 0x79,
The operation effect is as follows：
root#pyhao-VirtualBox:~/pyhao/tmp/bacnet-stack-1.0.0-yuan/apps/readprop# ./bacrp_mstp_x86 20000 0 0 85 --mac 78
pyh defined MSTP
MS/TP Interface: /dev/ttyS1
RS485: Initializing /dev/ttyS1 at Baud Rate 38400=success!
MS/TP MAC: 79
MS/TP Max_Master: 7F
MS/TP Max_Info_Frames: 10
pyh send read req
pyh Send_Read_Property_Request_Address
pyh dlmstp_send_pdu
pyh Ringbuf_Data_Put
pyh bytes_sent = 13
pyh pdu len = 0
pyh pdu len = 0
pyh pdu len = 0
pyh pdu len = 0
pyh pdu len = 0
pyh pdu len = 0
pyh pdu len = 0
bacnet-stack-1.0.0-yuan/apps/readprop/main.c
/* returns 0 bytes on timeout */
pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);
printf("pyh pdu len = %d\n", pdu_len);
As shown above, when I ran the client program I did not read the value of the property, and the server did not print anything, I was sure that my connection was okay because I used rs485.c for the 485 test and sent and received data normally.
The same way I used bacnet/ip to communicate normally, but it didn't work in mstp mode, I searched for some materials, but it didn't help me with the problem I was having
I am building a system that creates a WLAN AP over which the end user can Connect/disconnect the ESP to another AP ( For example a router) by posting a JSON String to a URL. In APSTA mode. When this is done a bool "_STA_START" is set to true. And the login parameters are saved in _STA_WIFI_SSID and _STA_WIFI_PASS.
I encounter a problem when writing the Task that manages the esp as Station. When the vTaskDelay() is called the code in the vTask_Manage_STA_Connection() just stops running. If I delete the statement. The code runs very fast until it casues a stack overflow and resets the esp.
start_Manage_STA_Connection() is called in main.c after I initialise the esp as Access Point.
Right now I see on the monitor that the loop in the vTask_Manage_STA_Connection runs a single time.
Below you can find my Tasks.c and Task.h
Task.h
#ifndef INCLUDE
#define INCLUDE
#include "config.h"
#endif
#ifndef INCLUDE_WLAN_STA
#define INCLUDE_WLAN_STA
#include "WLAN_STA.h"
#endif
// Dimensions the buffer that the task being created will use as its stack.
// NOTE: This is the number of words the stack will hold, not the number of
// bytes. For example, if each stack item is 32-bits, and this is set to 100,
// then 400 bytes (100 * 32-bits) will be allocated.
#define STACK_SIZE 2048
/// #brief Starts a Task to Manage the STA Connection
/// #param pvParameters
void vTask_Manage_STA_Connection( void * pvParameters );
/// #brief Calls vTask_Manage_STA_Connection in main.c
/// #param
void start_Manage_STA_Connection( void );
Tasks.c
#include "Tasks.h"
static const char *TAG_Manage_STA = "Manage STA Connection";
// Task to be created.
void vTask_Manage_STA_Connection(void *pvParameters)
{
for (;;)
{
// Task code goes here.
if (_STA_START == true)
{
ESP_LOGI(TAG_Manage_STA, "Connecting to Station...");
wifi_init_sta(
_STA_WIFI_SSID,
_STA_WIFI_PASS);
_STA_START = false;
}
ESP_LOGI(TAG_Manage_STA, "Managing STA Connection...");
vTaskDelay(100/portTICK_PERIOD_MS);
}
}
// Function that creates a task.
void start_Manage_STA_Connection(void)
{
static uint8_t ucParameterToPass;
TaskHandle_t xHandle = NULL;
// Create the task pinned to core 0, storing the handle. Note that the passed parameter ucParameterToPass
// must exist for the lifetime of the task, so in this case is declared static. If it was just an
// an automatic stack variable it might no longer exist, or at least have been corrupted, by the time
// the new task attempts to access it.
xTaskCreatePinnedToCore(vTask_Manage_STA_Connection,
"Manage_STA_Connection",
STACK_SIZE,
&ucParameterToPass,
(configMAX_PRIORITIES-1),
&xHandle, 0);
configASSERT(xHandle);
// Use the handle to delete the task.
if (xHandle != NULL)
{
vTaskDelete(xHandle);
}
}
The Monitor Output:
I (0) cpu_start: App cpu up.
I (388) cpu_start: Pro cpu start user code
I (388) cpu_start: cpu freq: 160000000
I (388) cpu_start: Application information:
I (392) cpu_start: Project name: wifi_softAP
I (398) cpu_start: App version: 1
I (402) cpu_start: Compile time: Dec 5 2022 11:50:36
I (408) cpu_start: ELF file SHA256: 3597702b82953470...
I (414) cpu_start: ESP-IDF: v4.4.2
I (419) heap_init: Initializing. RAM available for dynamic allocation:
I (426) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM
I (432) heap_init: At 3FFB7508 len 00028AF8 (162 KiB): DRAM
I (438) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (445) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (451) heap_init: At 400944E0 len 0000BB20 (46 KiB): IRAM
I (459) spi_flash: detected chip: gd
I (462) spi_flash: flash io: dio
I (467) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (559) MAIN: ESP_WIFI_MODE_AP/STA
I (569) WLAN AP: Wifi Loop Started
I (579) wifi:wifi driver task: 3ffc0378, prio:23, stack:6656, core=0
I (579) system_api: Base MAC address is not set
I (579) system_api: read default base MAC address from EFUSE
I (609) wifi:wifi firmware version: eeaa27d
I (609) wifi:wifi certification version: v7.0
I (609) wifi:config NVS flash: enabled
I (609) wifi:config nano formating: disabled
I (609) wifi:Init data frame dynamic rx buffer num: 32
I (619) wifi:Init management frame dynamic rx buffer num: 32
I (619) wifi:Init management short buffer num: 32
I (629) wifi:Init dynamic tx buffer num: 32
I (629) wifi:Init static rx buffer size: 1600
I (629) wifi:Init static rx buffer num: 10
I (639) wifi:Init dynamic rx buffer num: 32
I (639) wifi_init: rx ba win: 6
I (649) wifi_init: tcpip mbox: 32
I (649) wifi_init: udp mbox: 6
I (649) wifi_init: tcp mbox: 6
I (659) wifi_init: tcp tx win: 5744
I (659) wifi_init: tcp rx win: 5744
I (669) wifi_init: tcp mss: 1440
I (669) wifi_init: WiFi IRAM OP enabled
I (669) wifi_init: WiFi RX IRAM OP enabled
I (689) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07
I (789) wifi:mode : sta (30:ae:a4:80:4e:88) + softAP (30:ae:a4:80:4e:89)
I (789) wifi:enable tsf
I (789) wifi:Total power save buffer number: 16
I (789) wifi:Init max length of beacon: 752/752
I (789) wifi:Init max length of beacon: 752/752
I (799) WLAN AP: Error: Unknown AP Exception
I (799) WLAN AP: wifi_init_softap finished. SSID:myssid password:mypassword channel:4
I (799) WLAN AP: Access point started!
I (819) Manage STA Connection: Managing STA Connection...
I (91529) wifi:new:<1,1>, old:<1,1>, ap:<1,1>, sta:<0,0>, prof:1
I (91529) wifi:station: 1c:bf:ce:ca:79:de join, AID=1, bgn, 40U
I (91549) WLAN AP: station 1c:bf:ce:ca:79:de join, AID=1
I (91559) esp_netif_lwip: DHCP server assigned IP to a station, IP is: 192.168.5.2
I (91559) AP Webserver: Starting webserver
I (91559) AP Webserver: Starting server on port: '80'
I (91569) AP Webserver: Registering URI handlers
W (95189) wifi:<ba-add>idx:2 (ifx:1, 1c:bf:ce:ca:79:de), tid:0, ssn:190, winSize:64
I started with ESP32 last week and currently I am trying to put together the example codes for the BLE iBeacon and a 1-sec-alarm timer. I receive the error abort() was called at PC 0x403774b7 on core 0 0x403774b7: lock_acquire_generic at /home/boko/esp/esp-idf/components/newlib/locks.c:130 when running the program. I have a single ESP_LOGI() statement within the timer callback timer_alarm_cb, which seems to cause the issue, but I don't know why and how (if I remove the statment, the program works fine). What I want to achieve with the code is to get a debug print every 1 second as a visual feedback in order to know how many and which iBeacons have been detected within a 1 sec interval.
So, my 2 questions are:
Why the ESP_LOGI() statement within the timer callback causes the program to abort ?
What is the otherwise correct way to get debug print every 1 sec using a timer in ESP32?
My code is:
* SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Unlicense OR CC0-1.0
*/
/****************************************************************************
*
* This file is for iBeacon demo. It supports both iBeacon sender and receiver
* which is distinguished by macros IBEACON_SENDER and IBEACON_RECEIVER,
*
* iBeacon is a trademark of Apple Inc. Before building devices which use iBeacon technology,
* visit https://developer.apple.com/ibeacon/ to obtain a license.
*
****************************************************************************/
#include <stdint.h>
#include <string.h>
#include <stdbool.h>
#include <stdio.h>
#include "nvs_flash.h"
#include "esp_bt.h"
#include "esp_gap_ble_api.h"
#include "esp_gattc_api.h"
#include "esp_gatt_defs.h"
#include "esp_bt_main.h"
#include "esp_bt_defs.h"
#include "esp_ibeacon_api.h"
#include "esp_log.h"
#include "freertos/FreeRTOS.h" // If you include FreeRTOS.h before task.h then portmacro.h will be included for you (do not include portmacro.h manually, just include FreeRTOS.h). However, if you fail to include FreeRTOS.h before tasks.h, then your code will not build
// #include "freertos/task.h" // BaseType_t
#include "driver/gptimer.h"
static const char* PROGRAM_NAME = "iBeacon2Omnicomm" ; // "iBeacons-ESP32-Tracker-Server" ; // "IBEACON_DEMO";
extern esp_ble_ibeacon_vendor_t vendor_config;
///Declare static functions
static void esp_gap_cb(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param);
#if (IBEACON_MODE == IBEACON_RECEIVER)
static esp_ble_scan_params_t ble_scan_params = {
.scan_type = BLE_SCAN_TYPE_ACTIVE,
.own_addr_type = BLE_ADDR_TYPE_PUBLIC,
.scan_filter_policy = BLE_SCAN_FILTER_ALLOW_ALL,
.scan_interval = 0x50, // 50 ms scan interval, i.e. start scanning for BLE devices every 50 ms elapsed
.scan_window = 0x30, // 30 ms scan duration, i.e. whenever a scan interval starts, keep scanning for 30 ms
.scan_duplicate = BLE_SCAN_DUPLICATE_DISABLE
};
#elif (IBEACON_MODE == IBEACON_SENDER)
static esp_ble_adv_params_t ble_adv_params = {
.adv_int_min = 0x20,
.adv_int_max = 0x40,
.adv_type = ADV_TYPE_NONCONN_IND,
.own_addr_type = BLE_ADDR_TYPE_PUBLIC,
.channel_map = ADV_CHNL_ALL,
.adv_filter_policy = ADV_FILTER_ALLOW_SCAN_ANY_CON_ANY,
};
#endif
static void esp_gap_cb(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param)
{
esp_err_t err;
switch (event) {
case ESP_GAP_BLE_ADV_DATA_RAW_SET_COMPLETE_EVT:{
#if (IBEACON_MODE == IBEACON_SENDER)
esp_ble_gap_start_advertising(&ble_adv_params);
#endif
break;
}
case ESP_GAP_BLE_SCAN_PARAM_SET_COMPLETE_EVT: {
#if (IBEACON_MODE == IBEACON_RECEIVER)
//the unit of the duration is second, 0 means scan permanently
uint32_t duration = 0;
ESP_LOGI(PROGRAM_NAME, "starting a scan == calling esp_ble_gap_start_scanning()");
esp_ble_gap_start_scanning(duration);
#endif
break;
}
case ESP_GAP_BLE_SCAN_START_COMPLETE_EVT:
//scan start complete event to indicate scan start successfully or failed
if ((err = param->scan_start_cmpl.status) != ESP_BT_STATUS_SUCCESS) {
ESP_LOGE(PROGRAM_NAME, "Scan start failed: %s", esp_err_to_name(err));
} else {
ESP_LOGI(PROGRAM_NAME, "Scan start successful");
}
break;
case ESP_GAP_BLE_ADV_START_COMPLETE_EVT:
//adv start complete event to indicate adv start successfully or failed
if ((err = param->adv_start_cmpl.status) != ESP_BT_STATUS_SUCCESS) {
ESP_LOGE(PROGRAM_NAME, "Adv start failed: %s", esp_err_to_name(err));
}
break;
case ESP_GAP_BLE_SCAN_RESULT_EVT: {
esp_ble_gap_cb_param_t *scan_result = (esp_ble_gap_cb_param_t *)param; // make a local copy of the passed address of parameters
switch (scan_result->scan_rst.search_evt) {
case ESP_GAP_SEARCH_INQ_RES_EVT:
/* Search for BLE iBeacon Packet */
if (esp_ble_is_ibeacon_packet(scan_result->scan_rst.ble_adv, scan_result->scan_rst.adv_data_len)){
esp_ble_ibeacon_t *ibeacon_data = (esp_ble_ibeacon_t*)(scan_result->scan_rst.ble_adv);
// ESP_LOGI("iBeacon Found:"); // error: macro "ESP_LOGI" requires 3 arguments, but only 1 given
ESP_LOGI(PROGRAM_NAME, "iBeacon Found ==========");
esp_log_buffer_hex("MAC address:", scan_result->scan_rst.bda, ESP_BD_ADDR_LEN );
esp_log_buffer_hex("UUID:", ibeacon_data->ibeacon_vendor.proximity_uuid, ESP_UUID_LEN_128);
uint16_t major = ENDIAN_CHANGE_U16(ibeacon_data->ibeacon_vendor.major);
uint16_t minor = ENDIAN_CHANGE_U16(ibeacon_data->ibeacon_vendor.minor);
ESP_LOGI(PROGRAM_NAME, "Major: 0x%04x (%d)", major, major);
ESP_LOGI(PROGRAM_NAME, "Minor: 0x%04x (%d)", minor, minor);
//ESP_LOGI(PROGRAM_NAME, "Measured power (RSSI at a 1m distance):%d dbm", ibeacon_data->ibeacon_vendor.measured_power);
ESP_LOGI(PROGRAM_NAME, "RSSI:%d dbm", scan_result->scan_rst.rssi);
}
break;
default:
break;
}
break;
}
case ESP_GAP_BLE_SCAN_STOP_COMPLETE_EVT:
if ((err = param->scan_stop_cmpl.status) != ESP_BT_STATUS_SUCCESS){
ESP_LOGE(PROGRAM_NAME, "Scan stop failed: %s", esp_err_to_name(err));
}
else {
ESP_LOGI(PROGRAM_NAME, "Stop scan successfully");
}
break;
case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT:
if ((err = param->adv_stop_cmpl.status) != ESP_BT_STATUS_SUCCESS){
ESP_LOGE(PROGRAM_NAME, "Adv stop failed: %s", esp_err_to_name(err));
}
else {
ESP_LOGI(PROGRAM_NAME, "Stop adv successfully");
}
break;
default:
break;
}
}
void ble_ibeacon_appRegister(void)
{
esp_err_t status;
ESP_LOGI(PROGRAM_NAME, "registering callback == calling esp_ble_gap_register_callback()");
//register the scan callback function to the gap module:
if ((status = esp_ble_gap_register_callback(esp_gap_cb)) != ESP_OK) {
ESP_LOGE(PROGRAM_NAME, "gap register error: %s", esp_err_to_name(status));
return;
} else {
ESP_LOGI(PROGRAM_NAME, "successful");
}
}
void ble_ibeacon_init(void)
{
esp_bluedroid_init();
esp_bluedroid_enable();
ble_ibeacon_appRegister();
}
//## BaseType_t timerOverflow = pdFALSE;
// IRAM_ATTR: Forces code into IRAM instead of flash
static bool IRAM_ATTR timer_alarm_cb ( gptimer_handle_t timer, const gptimer_alarm_event_data_t * edata, void * user_data ) { // == ISR on timer overflow event
/*
BaseType_t high_task_awoken = pdFALSE;
QueueHandle_t queue = (QueueHandle_t) user_data;
// Retrieve count value and send to queue
example_queue_element_t ele = {
.event_count = edata->count_value
};
xQueueSendFromISR(queue, &ele, &high_task_awoken);
// return whether we need to yield at the end of ISR
return (high_task_awoken == pdTRUE);
*/
//## timerOverflow = pdTRUE ; // #define pdTRUE ( ( BaseType_t ) 1 ) --> typedef portBASE_TYPE BaseType_t; --> #define portBASE_TYPE int
ESP_LOGI(PROGRAM_NAME, "1 s elapsed");
// #return Whether a high priority task has been waken up by this function:
return pdFALSE ;
}
// if prototype declared as "static bool IRAM_ATTR ..." --> error: no return statement in function returning non-void [-Werror=return-type]
void app_main(void) {
ESP_ERROR_CHECK(nvs_flash_init());
ESP_ERROR_CHECK(esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT));
esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
esp_bt_controller_init(&bt_cfg);
esp_bt_controller_enable(ESP_BT_MODE_BLE);
ble_ibeacon_init();
/* set scan parameters */
#if (IBEACON_MODE == IBEACON_RECEIVER)
ESP_LOGI(PROGRAM_NAME, "setting RECEIVER scan parameters == calling esp_ble_gap_set_scan_params()");
esp_ble_gap_set_scan_params(&ble_scan_params);
#elif (IBEACON_MODE == IBEACON_SENDER)
esp_ble_ibeacon_t ibeacon_adv_data;
esp_err_t status = esp_ble_config_ibeacon_data (&vendor_config, &ibeacon_adv_data);
if (status == ESP_OK){
esp_ble_gap_config_adv_data_raw((uint8_t*)&ibeacon_adv_data, sizeof(ibeacon_adv_data));
}
else {
ESP_LOGE(PROGRAM_NAME, "Config iBeacon data failed: %s\n", esp_err_to_name(status));
}
#endif
// Creating a GPTimer Handle with Resolution (frequency) of 1 MHz:
ESP_LOGI(PROGRAM_NAME, "Creating new timer (handle)");
gptimer_handle_t gptimer = NULL;
gptimer_config_t timer_config = {
.clk_src = GPTIMER_CLK_SRC_DEFAULT,
.direction = GPTIMER_COUNT_UP,
.resolution_hz = 1 * 1000 * 1000, // 1MHz, 1 tick = 1us
};
ESP_ERROR_CHECK(gptimer_new_timer(&timer_config, &gptimer));
// Prepare Triggering of Periodic Events (set up the alarm action before starting the timer !) every 1 sec:
ESP_LOGI(PROGRAM_NAME, "Setting alarm action");
gptimer_alarm_config_t alarm_config = {
.reload_count = 0, // counter will reload with 0 on alarm event
.alarm_count = 1000000, // period = 1s #resolution 1MHz
.flags.auto_reload_on_alarm = true, // enable auto-reload
};
ESP_ERROR_CHECK(gptimer_set_alarm_action(gptimer, &alarm_config));
ESP_LOGI(PROGRAM_NAME, "Registering callback function to execute on alarm event");
gptimer_event_callbacks_t cbs = {
.on_alarm = timer_alarm_cb, // register user callback
};
ESP_ERROR_CHECK(gptimer_register_event_callbacks(gptimer, &cbs, NULL));
ESP_ERROR_CHECK(gptimer_enable(gptimer));
ESP_LOGI(PROGRAM_NAME, "Starting timer");
ESP_ERROR_CHECK(gptimer_start(gptimer));
/*
while ( 1 ) {
if ( timerOverflow ) {
timerOverflow = pdFALSE ;
ESP_LOGI(PROGRAM_NAME, "1 s elapsed");
}
}
*/
}
An example terminal output is:
/home/boko/.espressif/python_env/idf5.1_py3.10_envboko#boko-HP-EliteBook-850-G8-Notebook-PC:~/Desktop/ESP32/ble_ibeacon$ export IDF_PATH=/home/boko/esp/esp-idf
boko#boko-HP-EliteBook-850-G8-Notebook-PC:~/Desktop/ESP32/ble_ibeacon$ /home/boko/.espressif/python_env/idf5.1_py3.10_env/bin/python /home/boko/esp/esp-idf/tools/idf_monitor.py -p /dev/ttyUSB0 -b 115200 --toolchain-prefix xtensa-esp32s3-elf- --target esp32s3 /home/boko/Desktop/ESP32/ble_ibeacon/build/ble_ibeacon_demo.elf
--- idf_monitor on /dev/ttyUSB0 115200 ---
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---
) UUID:: fd a5�ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3810,len:0x16ac
load:0x403c9700,len:0xbc8
load:0x403cc700,len:0x2d64
entry 0x403c98fc
I (25) boot: ESP-IDF v5.1-dev-1626-g4b6d9c8ad3 2nd stage bootloader
I (25) boot: compile time Nov 11 2022 16:57:52
I (25) boot: chip revision: V001
I (29) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (36) boot.esp32s3: Boot SPI Speed : 80MHz
I (41) boot.esp32s3: SPI Mode : DIO
I (46) boot.esp32s3: SPI Flash Size : 2MB
I (51) boot: Enabling RNG early entropy source...
I (56) boot: Partition Table:
I (60) boot: ## Label Usage Type ST Offset Length
I (67) boot: 0 nvs WiFi data 01 02 00009000 00006000
I (74) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (82) boot: 2 factory factory app 00 00 00010000 00100000
I (89) boot: End of partition table
I (93) boot_comm: chip revision: 1, min. application chip revision: 0
I (101) esp_image: segment 0: paddr=00010020 vaddr=3c080020 size=1e524h (124196) map
I (131) esp_image: segment 1: paddr=0002e54c vaddr=3fc96a00 size=01acch ( 6860) load
I (133) esp_image: segment 2: paddr=00030020 vaddr=42000020 size=7514ch (479564) map
I (223) esp_image: segment 3: paddr=000a5174 vaddr=3fc984cc size=02484h ( 9348) load
I (225) esp_image: segment 4: paddr=000a7600 vaddr=40374000 size=12998h ( 76184) load
I (253) boot: Loaded app from partition at offset 0x10000
I (253) boot: Disabling RNG early entropy source...
I (265) cpu_start: Pro cpu up.
I (265) cpu_start: Starting app cpu, entry point is 0x403753cc
0x403753cc: call_start_cpu1 at /home/boko/esp/esp-idf/components/esp_system/port/cpu_start.c:146
I (0) cpu_start: App cpu up.
I (279) cpu_start: Pro cpu start user code
I (279) cpu_start: cpu freq: 160000000 Hz
I (280) cpu_start: Application information:
I (282) cpu_start: Project name: ble_ibeacon_demo
I (288) cpu_start: App version: 1
I (293) cpu_start: Compile time: Nov 11 2022 16:57:45
I (299) cpu_start: ELF file SHA256: 2432859c4fe13f02...
I (305) cpu_start: ESP-IDF: v5.1-dev-1626-g4b6d9c8ad3
I (311) heap_init: Initializing. RAM available for dynamic allocation:
I (318) heap_init: At 3FC9E8F8 len 0004AE18 (299 KiB): D/IRAM
I (325) heap_init: At 3FCE9710 len 00005724 (21 KiB): STACK/DRAM
I (332) heap_init: At 3FCF0000 len 00008000 (32 KiB): DRAM
I (338) heap_init: At 600FE010 len 00001FF0 (7 KiB): RTCRAM
I (345) spi_flash: detected chip: generic
I (349) spi_flash: flash io: dio
W (353) spi_flash: Detected size(8192k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (366) coexist: coexist rom version e7ae62f
I (371) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (415) BT_INIT: BT controller compile version [76c24c9]
I (415) phy_init: phy_version 503,13653eb,Jun 1 2022,17:47:08
I (455) system_api: Base MAC address is not set
I (455) system_api: read default base MAC address from EFUSE
I (455) BT_INIT: Bluetooth MAC: 7c:df:a1:e3:55:fa
I (485) iBeacon2Omnicomm: registering callback == calling esp_ble_gap_register_callback()
I (485) iBeacon2Omnicomm: successful
I (485) iBeacon2Omnicomm: setting RECEIVER scan parameters == calling esp_ble_gap_set_scan_params()
I (495) iBeacon2Omnicomm: starting a scan == calling esp_ble_gap_start_scanning()
I (505) iBeacon2Omnicomm: Scan start successful
I (505) iBeacon2Omnicomm: Creating new timer (handle)
I (515) iBeacon2Omnicomm: Setting alarm action
I (515) iBeacon2Omnicomm: Registering callback function to execute on alarm event
I (525) iBeacon2Omnicomm: Starting timer
I (755) iBeacon2Omnicomm: iBeacon Found ==========
I (755) MAC address:: ac 23 3f a8 c3 a8
I (755) UUID:: fd a5 06 93 a4 e2 4f b1 af cf c6 eb 07 64 78 25
I (765) iBeacon2Omnicomm: Major: 0x08ae (2222)
I (765) iBeacon2Omnicomm: Minor: 0x08ae (2222)
I (775) iBeacon2Omnicomm: RSSI:-48 dbm
I (805) iBeacon2Omnicomm: iBeacon Found ==========
I (805) MAC address:: ac 23 3f a8 c3 a8
I (805) UUID:: fd a5 06 93 a4 e2 4f b1 af cf c6 eb 07 64 78 25
I (805) iBeacon2Omnicomm: Major: 0x04d2 (1234)
I (815) iBeacon2Omnicomm: Minor: 0x269e (9886)
I (815) iBeacon2Omnicomm: RSSI:-43 dbm
abort() was called at PC 0x403774b7 on core 0
0x403774b7: lock_acquire_generic at /home/boko/esp/esp-idf/components/newlib/locks.c:130
Backtrace: 0x40375ebe:0x3fc979f0 0x4037ec61:0x3fc97a10 0x403846a6:0x3fc97a30 0x403774b7:0x3fc97aa0 0x403775cd:0x3fc97ad0 0x4037769c:0x3fc97af0 0x420653c1:0x3fc97b20 0x42068505:0x3fc97e30 0x42075151:0x3fc97e60 0x40384555:0x3fc97e90 0x40377b75:0x3fc97ee0 0x40379d85:0x3fc97f00 0x40377295:0x3fc97f30 0x4037d8a7:0x3fcf3fb0 0x42003bc2:0x3fcf3fd0 0x40380151:0x3fcf3ff0 0x4038195d:0x3fcf4010
0x40375ebe: panic_abort at /home/boko/esp/esp-idf/components/esp_system/panic.c:423
0x4037ec61: esp_system_abort at /home/boko/esp/esp-idf/components/esp_system/esp_system.c:135
0x403846a6: abort at /home/boko/esp/esp-idf/components/newlib/abort.c:38
0x403774b7: lock_acquire_generic at /home/boko/esp/esp-idf/components/newlib/locks.c:130
0x403775cd: _lock_acquire_recursive at /home/boko/esp/esp-idf/components/newlib/locks.c:158
0x4037769c: __retarget_lock_acquire_recursive at /home/boko/esp/esp-idf/components/newlib/locks.c:314 (discriminator 3)
0x420653c1: _vfprintf_r at ??:?
0x42068505: vprintf at /builds/idf/crosstool-NG/.build/xtensa-esp32s3-elf/src/newlib/newlib/libc/stdio/vprintf.c:34 (discriminator 5)
0x42075151: esp_log_writev at /home/boko/esp/esp-idf/components/log/log.c:200
0x40384555: esp_log_write at /home/boko/esp/esp-idf/components/log/log.c:210
0x40377b75: timer_alarm_cb at /home/boko/Desktop/ESP32/ble_ibeacon/main/ibeacon_demo.c:200
0x40379d85: gptimer_default_isr at /home/boko/esp/esp-idf/components/driver/gptimer.c:512
0x40377295: _xt_lowint1 at /home/boko/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/xtensa_vectors.S:1118
0x4037d8a7: xt_utils_wait_for_intr at /home/boko/esp/esp-idf/components/xtensa/include/xt_utils.h:81
(inlined by) esp_cpu_wait_for_intr at /home/boko/esp/esp-idf/components/esp_hw_support/cpu.c:115
0x42003bc2: esp_vApplicationIdleHook at /home/boko/esp/esp-idf/components/esp_system/freertos_hooks.c:59
0x40380151: prvIdleTask at /home/boko/esp/esp-idf/components/freertos/FreeRTOS-Kernel/tasks.c:4273 (discriminator 1)
0x4038195d: vPortTaskWrapper at /home/boko/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/port.c:152
ELF file SHA256: 2432859c4fe13f02
Rebooting...
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x3 (RTC_SW_SYS_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x4037585c
0x4037585c: esp_restart_noos_dig at /home/boko/esp/esp-idf/components/esp_system/esp_system.c:46 (discriminator 1)
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fce3810,len:0x16ac
load:0x403c9700,len:0xbc8
load:0x403cc700,len:0x2d64
entry 0x403c98fc
I (29) boot: ESP-IDF v5.1-dev-1626-g4b6d9c8ad3 2nd stage bootloader
I (29) boot: compile time Nov 11 2022 16:57:52
I (30) boot: chip revision: V001
I (34) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (41) boot.esp32s3: Boot SPI Speed : 80MHz
I (46) boot.esp32s3: SPI Mode : DIO
I (50) boot.esp32s3: SPI Flash Size : 2MB
I (55) boot: Enabling RNG early entropy source...
I (60) boot: Partition Table:
I (64) boot: ## Label Usage Type ST Offset Length
I (79) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (86) boot: 2 factory factory app 00 00 00010000 00100000
I (94) boot: End of partition table
I (98) boot_comm: chip revision: 1, min. application chip revision: 0
I (105) esp_image: segment 0: paddr=00010020 vaddr=3c080020 size=1e524h (124196) map
I (136) esp_image: segment 1: paddr=0002e54c vaddr=3fc96a00 size=01acch ( 6860) load
I (138) esp_image: segment 2: paddr=00030020 vaddr=42000020 size=7514ch (479564) map
I (228) esp_image: segment 3: paddr=000a5174 vaddr=3fc984cc size=02484h ( 9348) load
I (230) esp_image: segment 4: paddr=000a7600 vaddr=40374000 size=12998h ( 76184) load
I (258) boot: Loaded app from partition at offset 0x10000
I (258) boot: Disabling RNG early entropy source...
I (269) cpu_start: Pro cpu up.
I (269) cpu_start: Starting app cpu, entry point is 0x403753cc
0x403753cc: call_start_cpu1 at /home/boko/esp/esp-idf/components/esp_system/port/cpu_start.c:146
I (0) cpu_start: App cpu up.
I (284) cpu_start: Pro cpu start user code
I (284) cpu_start: cpu freq: 160000000 Hz
I (284) cpu_start: Application information:
I (287) cpu_start: Project name: ble_ibeacon_demo
I (293) cpu_start: App version: 1
I (297) cpu_start: Compile time: Nov 11 2022 16:57:45
I (303) cpu_start: ELF file SHA256: 2432859c4fe13f02...
I (309) cpu_start: ESP-IDF: v5.1-dev-1626-g4b6d9c8ad3
I (316) heap_init: Initializing. RAM available for dynamic allocation:
I (323) heap_init: At 3FC9E8F8 len 0004AE18 (299 KiB): D/IRAM
I (329) heap_init: At 3FCE9710 len 00005724 (21 KiB): STACK/DRAM
I (336) heap_init: At 3FCF0000 len 00008000 (32 KiB): DRAM
I (342) heap_init: At 600FE010 len 00001FF0 (7 KiB): RTCRAM
I (349) spi_flash: detected chip: generic
I (353) spi_flash: flash io: dio
W (357) spi_flash: Detected size(8192k) larger than the size in the binary image header(2048k). Using the size in the binary image header.
I (371) coexist: coexist rom version e7ae62f
I (375) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (420) BT_INIT: BT controller compile version [76c24c9]
I (420) phy_init: phy_version 503,13653eb,Jun 1 2022,17:47:08
I (460) system_api: Base MAC address is not set
I (460) system_api: read default base MAC address from EFUSE
I (460) BT_INIT: Bluetooth MAC: 7c:df:a1:e3:55:fa
I (490) iBeacon2Omnicomm: registering callback == calling esp_ble_gap_register_callback()
I (490) iBeacon2Omnicomm: successful
I (490) iBeacon2Omnicomm: setting RECEIVER scan parameters == calling esp_ble_gap_set_scan_params()
I (500) iBeacon2Omnicomm: starting a scan == calling esp_ble_gap_start_scanning()
I (510) iBeacon2Omnicomm: Scan start successful
I (510) iBeacon2Omnicomm: Creating new timer (handle)
I (520) iBeacon2Omnicomm: Setting alarm action
I (520) iBeacon2Omnicomm: Registering callback function to execute on alarm event
I (530) iBeacon2Omnicomm: Starting timer
I (580) iBeacon2Omnicomm: iBeacon Found ==========
I (580) MAC address:: ac 23 3f a8 c3 a8
I (580) UUID:: fd a5 06 93 a4 e2 4f b1 af cf c6 eb 07 64 78 25
I (590) iBeacon2Omnicomm: Major: 0x2711 (10001)
I (590) iBeacon2Omnicomm: Minor: 0x4cb9 (19641)
I (600) iBeacon2Omnicomm: RSSI:-37 dbm
I (1220) iBeacon2Omnicomm: iBeacon Found ==========
I (1220) MAC address:: ac 23 3f a8 c3 a8
I (1220) UUID:: fd a5 06 93 a4 e2 4f b1 af cf c6 eb 07 64 78 25
I (1230) iBeacon2Omnicomm: Major: 0x04d2 (1234)
I (1230) iBeacon2Omnicomm: Minor: 0x269e (9886)
I (1240) iBeacon2Omnicomm: RSSI:-51 dbm
abort() was called at PC 0x403774b7 on core 0
0x403774b7: lock_acquire_generic at /home/boko/esp/esp-idf/components/newlib/locks.c:130
Backtrace: 0x40375ebe:0x3fc979f0 0x4037ec61:0x3fc97a10 0x403846a6:0x3fc97a30 0x403774b7:0x3fc97aa0 0x403775cd:0x3fc97ad0 0x4037769c:0x3fc97af0 0x420653c1:0x3fc97b20 0x42068505:0x3fc97e30 0x42075151:0x3fc97e60 0x40384555:0x3fc97e90 0x40377b75:0x3fc97ee0 0x40379d85:0x3fc97f00 0x40377295:0x3fc97f30 0x4037d8a7:0x3fcf3fb0 0x42003bc2:0x3fcf3fd0 0x40380151:0x3fcf3ff0 0x4038195d:0x3fcf4010
0x40375ebe: panic_abort at /home/boko/esp/esp-idf/components/esp_system/panic.c:423
0x4037ec61: esp_system_abort at /home/boko/esp/esp-idf/components/esp_system/esp_system.c:135
0x403846a6: abort at /home/boko/esp/esp-idf/components/newlib/abort.c:38
0x403774b7: lock_acquire_generic at /home/boko/esp/esp-idf/components/newlib/locks.c:130
0x403775cd: _lock_acquire_recursive at /home/boko/esp/esp-idf/components/newlib/locks.c:158
0x4037769c: __retarget_lock_acquire_recursive at /home/boko/esp/esp-idf/components/newlib/locks.c:314 (discriminator 3)
0x420653c1: _vfprintf_r at ??:?
0x42068505: vprintf at /builds/idf/crosstool-NG/.build/xtensa-esp32s3-elf/src/newlib/newlib/libc/stdio/vprintf.c:34 (discriminator 5)
0x42075151: esp_log_writev at /home/boko/esp/esp-idf/components/log/log.c:200
0x40384555: esp_log_write at /home/boko/esp/esp-idf/components/log/log.c:210
0x40377b75: timer_alarm_cb at /home/boko/Desktop/ESP32/ble_ibeacon/main/ibeacon_demo.c:200
0x40379d85: gptimer_default_isr at /home/boko/esp/esp-idf/components/driver/gptimer.c:512
0x40377295: _xt_lowint1 at /home/boko/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/xtensa_vectors.S:1118
0x4037d8a7: xt_utils_wait_for_intr at /home/boko/esp/esp-idf/components/xtensa/include/xt_utils.h:81
(inlined by) esp_cpu_wait_for_intr at /home/boko/esp/esp-idf/components/esp_hw_support/cpu.c:115
0x42003bc2: esp_vApplicationIdleHook at /home/boko/esp/esp-idf/components/esp_system/freertos_hooks.c:59
0x40380151: prvIdleTask at /home/boko/esp/esp-idf/components/freertos/FreeRTOS-Kernel/tasks.c:4273 (discriminator 1)
0x4038195d: vPortTaskWrapper at /home/boko/esp/esp-idf/components/freertos/FreeRTOS-Kernel/portable/xtensa/port.c:152
You're trying to log from within a General Purpose Timer interrupt. Quoting from documentation for Logging library:
This function or these macros should not be used from an interrupt.
There's also a longer comment from an Espressif developer explaining why. There seems to be another macro ESP_DRAM_LOGE for printing from within an interrupt (which is usually not a good idea).
Anyway, for anything except the most stringent real-time criteria I'd recommend using the High Resolution Timer instead. It's still run on top of the hardware timer peripheral, but processing of callbacks is deferred to a dedicated timer task (yes, you have to wait for a short time until the scheduler gets around to executing that task). This means your callbacks run in a regular task and can call logging functions. Don't go overboard - you still want the deferred timer callbacks to be reasonably quick to avoid timing jittering.
I've created a program in C that sends data with UDP packets.
Socket is made don't fragment using
int optval = IP_PMTUDISC_DO;
if(setsockopt(sd,IPPROTO_IP,IP_MTU_DISCOVER,&optval,sizeof(int))!=0)
{
perror("setsocketopt()");
return 0;
}
Checking with TSHARK at the server (debian 8 KVM virtualizied), for all packets don't fragment has been set:
But at the client, large packets receiving fragmented!!
Then I figured something more wired. The IPv4 ID field has been set to 0!
I thought it might be because of the don't fragment effect (because no packet is going to be fragmented).
Then I started Openvpn program and sniffed its packets at the server but the packets had IPv4 ID != 0 while don't fragment was set.
Do you guys have any idea that why is this happening to me?!
Edit: Here is another sample of a large packet at server copy and pasted from tshark result.
Frame 1049: 1514 bytes on wire (12112 bits), 1514 bytes captured (12112 bits) on interface 0
Ethernet II, Src: server_mac, Dst: gateway_mac
Internet Protocol Version 4, Src: server_ip, Dst: client_ip
Version: 4
Header Length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00: Not-ECT (Not ECN-Capable Transport))
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..00 = Explicit Congestion Notification: Not-ECT (Not ECN-Capable Transport) (0x00)
Total Length: 1500
Identification: 0x0000 (0)
Flags: 0x02 (Don't Fragment)
0... .... = Reserved bit: Not set
.1.. .... = Don't fragment: Set
..0. .... = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: UDP (17)
Header checksum: 0xa52d [validation disabled]
[Good: False]
[Bad: False]
Source: server_ip
Destination: client_ip
[Source GeoIP: Unknown]
[Destination GeoIP: Unknown]
User Datagram Protocol, Src Port: 7554 (7554), Dst Port: 45376 (45376)
Data (1472 bytes)
Like you see, don't fragment has been set, while all packets larger than PMTU are receiving fragmented to client side.
This is a packet trace example of openvpn on the same server. like you see it at least has IPv4 ID calculated!
Frame 3749: 1455 bytes on wire (11640 bits), 1455 bytes captured (11640 bits) on interface 0
Ethernet II, Src: SERVER_MAC, Dst: GATEWAY_MAC
Internet Protocol Version 4, Src: SERVER_IP, Dst: CLIENT_IP
Version: 4
Header Length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00: Not-ECT (Not ECN-Capable Transport))
0000 00.. = Differentiated Services Codepoint: Default (0x00)
.... ..00 = Explicit Congestion Notification: Not-ECT (Not ECN-Capable Transport) (0x00)
Total Length: 1441
Identification: 0xcc96 (52374)
Flags: 0x02 (Don't Fragment)
0... .... = Reserved bit: Not set
.1.. .... = Don't fragment: Set
..0. .... = More fragments: Not set
Fragment offset: 0
Time to live: 64
Protocol: UDP (17)
Header checksum: 0xe252 [validation disabled]
[Good: False]
[Bad: False]
Source: SERVER_IP
Destination: CLIENT_IP
[Source GeoIP: Unknown]
[Destination GeoIP: Unknown]
User Datagram Protocol, Src Port: 19234 (19234), Dst Port: 46921 (46921)
Data (1413 bytes)
I wrote a program to send 1460 byte data using TCP client and server continuously. My system interface MTU is 1500.
Here is my program of client
if((sockfd = socket(AF_INET, SOCK_STREAM, 0))< 0)
{
printf("\n Error : Could not create socket \n");
return 1;
}
setsockopt(sockfd,SOL_TCP,TCP_NODELAY,&one,sizeof(one));
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(9998);
serv_addr.sin_addr.s_addr = inet_addr("10.10.12.1");
if(connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr))<0)
{
printf("\n Error : Connect Failed \n");
return 1;
}
while(1)
{
write(sockfd, send_buff, 1448) ;
}
In wireshark initial 15 to 30 packets are showing that 1514 byte of packet is going but afterwards showing as below
wireshark output of some packet
No. Time Source Destination Protocol Length Info
16 0.000000 10.10.12.2 10.10.12.1 TCP 5858 53649 > distinct32 [ACK] Seq=3086892290 Ack=250285353 Win=14608 Len=5792 TSval=23114307 TSecr=23833274
Frame 16: 5858 bytes on wire (46864 bits), 5858 bytes captured (46864 bits)
Ethernet II, Src: 6c:3b:e5:14:9a:a2 (6c:3b:e5:14:9a:a2), Dst: Ibm_b5:86:85 (00:1a:64:b5:86:85)
Internet Protocol Version 4, Src: 10.10.12.2 (10.10.12.2), Dst: 10.10.12.1 (10.10.12.1)
Version: 4
Header length: 20 bytes
Differentiated Services Field: 0x00 (DSCP 0x00: Default; ECN: 0x00: Not-ECT (Not ECN-Capable Transport))
Total Length: 5844
Identification: 0x8480 (33920)
Flags: 0x00
Fragment offset: 0
Time to live: 64
Protocol: TCP (6)
Header checksum: 0xb38d [correct]
Source: 10.10.12.2 (10.10.12.2)
Destination: 10.10.12.1 (10.10.12.1)
Transmission Control Protocol, Src Port: 53649 (53649), Dst Port: distinct32 (9998), Seq: 3086892290, Ack: 250285353, Len: 5792
Source port: 53649 (53649)
Destination port: distinct32 (9998)
[Stream index: 0]
Sequence number: 3086892290
[Next sequence number: 3086898082]
Acknowledgement number: 250285353
Header length: 32 bytes
Flags: 0x010 (ACK)
Window size value: 913
[Calculated window size: 14608]
[Window size scaling factor: 16]
Checksum: 0x42dd [validation disabled]
Options: (12 bytes)
No-Operation (NOP)
No-Operation (NOP)
Timestamps: TSval 23114307, TSecr 23833274
Data (5792 bytes)
On wireshark it is showing that more than 5792, 7000, 65535 byte of packet are going.
But i am sending 1514 byte of packet in one go. on other side i am receiving 1514 byte of packets only due to network mtu.
So my question is
why this much of huge packets are going ?
I tried without NODELAY option also but it is not working.
Is there any solution to send particular packet size (such as 1514 byte) can be send, no jumbo frames ?
I update my tcp_rmem and tcp_wmem also for tcp sending buffer and receiving buffer also. But did not found any solution.
TCP, by design, bundles up multiple write() calls into larger packets. Also, TCP coalesces packets by default according to Nagle's Algorithm.
If you want more control over the actual size of network packets, use UDP.
These are "jumbo frames", and they're faster than traditional frame sizes because they don't load up a CPU as much.
Consider yourself fortunate that you're getting them without futzing around with your IP stack's settings.
I searched a lot and found that, we need to change some parameter on interface.
On my interface eth0 default option are
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp-segmentation-offload: on
udp-fragmentation-offload: off
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: off
now using ethtool we need to off some sending side segementation offload.
For that
sudo ethtool -K eth0 tso off gso off
using this
Offload parameters for eth0:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp-segmentation-offload: off
udp-fragmentation-offload: off
generic-segmentation-offload: off
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: off
After this your interface will send packets whatever you want to send.