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ESP32/components/iperf/iperf.c

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C
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#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_log.h"
#include "esp_err.h"
#include "esp_timer.h"
#include "nvs_flash.h"
#include "nvs.h"
#include "esp_event.h"
#include "esp_netif.h"
#include "esp_wifi.h"
#include "iperf.h"
static const char *TAG = "iperf";
// --- LED STATE MANAGEMENT ---
typedef enum {
LED_OFF,
LED_BLUE_SOLID, // Monitor Mode
LED_RED_FLASH, // No WiFi
LED_AMBER_SOLID, // Connected, No IP
LED_GREEN_SOLID, // Got IP / Ready
LED_PURPLE_SOLID, // Transmitting
LED_PURPLE_FLASH // Socket Error
} led_state_t;
static led_state_t s_led_state = LED_RED_FLASH;
// --- Helper: Set Physical LED ---
static void iperf_set_physical_led(uint8_t r, uint8_t g, uint8_t b) {
// Implement hardware specific LED driver here
}
// --- LED Task ---
static void status_led_task(void *arg) {
bool toggle = false;
while (1) {
switch (s_led_state) {
case LED_BLUE_SOLID: iperf_set_physical_led(0, 0, 64); vTaskDelay(pdMS_TO_TICKS(500)); break;
case LED_RED_FLASH: iperf_set_physical_led(toggle ? 64 : 0, 0, 0); vTaskDelay(pdMS_TO_TICKS(250)); toggle = !toggle; break;
case LED_AMBER_SOLID: iperf_set_physical_led(32, 16, 0); vTaskDelay(pdMS_TO_TICKS(500)); break;
case LED_GREEN_SOLID: iperf_set_physical_led(0, 64, 0); vTaskDelay(pdMS_TO_TICKS(500)); break;
case LED_PURPLE_SOLID: iperf_set_physical_led(64, 0, 64); vTaskDelay(pdMS_TO_TICKS(200)); break;
case LED_PURPLE_FLASH: iperf_set_physical_led(toggle ? 64 : 0, 0, 64); vTaskDelay(pdMS_TO_TICKS(250)); toggle = !toggle; break;
default: iperf_set_physical_led(0, 0, 0); vTaskDelay(pdMS_TO_TICKS(500)); break;
}
}
}
// --- Synchronization ---
static EventGroupHandle_t s_iperf_event_group = NULL;
#define IPERF_IP_READY_BIT (1 << 0)
#define IPERF_STOP_REQ_BIT (1 << 1)
typedef struct {
iperf_cfg_t cfg;
bool finish;
uint32_t total_len;
uint32_t buffer_len;
uint8_t *buffer;
uint32_t sockfd;
} iperf_ctrl_t;
static iperf_ctrl_t s_iperf_ctrl = {0};
static TaskHandle_t s_iperf_task_handle = NULL;
static esp_event_handler_instance_t instance_any_id;
static esp_event_handler_instance_t instance_got_ip;
// --- Network Event Handler ---
static void iperf_network_event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data)
{
if (s_iperf_event_group == NULL) return;
if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_CONNECTED) {
s_led_state = LED_AMBER_SOLID;
}
else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
xEventGroupSetBits(s_iperf_event_group, IPERF_IP_READY_BIT);
if (s_led_state != LED_PURPLE_SOLID && s_led_state != LED_PURPLE_FLASH) {
s_led_state = LED_GREEN_SOLID;
}
}
else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
xEventGroupClearBits(s_iperf_event_group, IPERF_IP_READY_BIT);
s_led_state = LED_RED_FLASH;
}
}
// --- Wait for IP ---
static bool iperf_wait_for_ip(void) {
if (!s_iperf_event_group) s_iperf_event_group = xEventGroupCreate();
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &iperf_network_event_handler, NULL, &instance_any_id));
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &iperf_network_event_handler, NULL, &instance_got_ip));
esp_netif_t *netif = esp_netif_get_handle_from_ifkey("WIFI_STA_DEF");
if (netif) {
esp_netif_ip_info_t ip_info;
if (esp_netif_get_ip_info(netif, &ip_info) == ESP_OK) {
if (ip_info.ip.addr != 0) {
xEventGroupSetBits(s_iperf_event_group, IPERF_IP_READY_BIT);
s_led_state = LED_GREEN_SOLID;
} else {
wifi_ap_record_t ap_info;
if (esp_wifi_sta_get_ap_info(&ap_info) == ESP_OK) s_led_state = LED_AMBER_SOLID;
}
}
}
ESP_LOGI(TAG, "Waiting for IP address...");
EventBits_t bits = xEventGroupWaitBits(s_iperf_event_group, IPERF_IP_READY_BIT | IPERF_STOP_REQ_BIT, pdFALSE, pdFALSE, portMAX_DELAY);
esp_event_handler_instance_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID, instance_any_id);
esp_event_handler_instance_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP, instance_got_ip);
if (bits & IPERF_STOP_REQ_BIT) return false;
return true;
}
// --- Read NVS ---
static void iperf_read_nvs_config(iperf_cfg_t *cfg) {
nvs_handle_t my_handle;
esp_err_t err = nvs_open("storage", NVS_READONLY, &my_handle);
if (err != ESP_OK) return;
size_t required_size;
uint32_t val = 0;
if (nvs_get_u32(my_handle, NVS_KEY_IPERF_RATE, &val) == ESP_OK && val > 0) cfg->bw_lim = val;
if (nvs_get_u32(my_handle, NVS_KEY_IPERF_BURST, &val) == ESP_OK && val > 0) cfg->burst_count = val; else cfg->burst_count = 1;
if (nvs_get_u32(my_handle, NVS_KEY_IPERF_LEN, &val) == ESP_OK && val > 0) cfg->send_len = val; else cfg->send_len = IPERF_UDP_TX_LEN;
if (nvs_get_str(my_handle, NVS_KEY_IPERF_DST_IP, NULL, &required_size) == ESP_OK) {
char *ip_str = malloc(required_size);
if (ip_str) { nvs_get_str(my_handle, NVS_KEY_IPERF_DST_IP, ip_str, &required_size); cfg->dip = inet_addr(ip_str); free(ip_str); }
}
if (nvs_get_str(my_handle, NVS_KEY_IPERF_ROLE, NULL, &required_size) == ESP_OK) {
char *role = malloc(required_size);
if (role) {
nvs_get_str(my_handle, NVS_KEY_IPERF_ROLE, role, &required_size);
if (strcmp(role, "SERVER") == 0) { cfg->flag &= ~IPERF_FLAG_CLIENT; cfg->flag |= IPERF_FLAG_SERVER; }
else { cfg->flag &= ~IPERF_FLAG_SERVER; cfg->flag |= IPERF_FLAG_CLIENT; }
free(role);
}
}
if (nvs_get_str(my_handle, NVS_KEY_IPERF_PROTO, NULL, &required_size) == ESP_OK) {
char *proto = malloc(required_size);
if (proto) {
nvs_get_str(my_handle, NVS_KEY_IPERF_PROTO, proto, &required_size);
if (strcmp(proto, "TCP") == 0) { cfg->flag &= ~IPERF_FLAG_UDP; cfg->flag |= IPERF_FLAG_TCP; }
else { cfg->flag &= ~IPERF_FLAG_TCP; cfg->flag |= IPERF_FLAG_UDP; }
free(proto);
}
}
nvs_close(my_handle);
}
// --- Stubbed / Unused Functions (Marked to silence warnings) ---
static void __attribute__((unused)) socket_send(int sockfd, const uint8_t *buffer, int len) {
// Stub
}
static int __attribute__((unused)) socket_recv(int sockfd, uint8_t *buffer, int len, TickType_t timeout_ticks) {
return 0; // Stub
}
static esp_err_t iperf_start_tcp_server(iperf_ctrl_t *ctrl) {
ESP_LOGW(TAG, "TCP Server not implemented");
return ESP_FAIL;
}
static esp_err_t iperf_start_tcp_client(iperf_ctrl_t *ctrl) {
ESP_LOGW(TAG, "TCP Client not implemented");
return ESP_FAIL;
}
static esp_err_t iperf_start_udp_server(iperf_ctrl_t *ctrl) {
ESP_LOGW(TAG, "UDP Server not implemented");
return ESP_FAIL;
}
// -----------------------------------------------------------------------------
// MAIN UDP CLIENT
// -----------------------------------------------------------------------------
static esp_err_t iperf_start_udp_client(iperf_ctrl_t *ctrl)
{
if (!iperf_wait_for_ip()) return ESP_FAIL;
struct sockaddr_in addr;
int sockfd;
struct timeval tv;
sockfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (sockfd < 0) {
ESP_LOGE(TAG, "Unable to create socket: errno %d", errno);
s_led_state = LED_RED_FLASH;
return ESP_FAIL;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(ctrl->cfg.dport);
addr.sin_addr.s_addr = ctrl->cfg.dip;
uint32_t burst_count = ctrl->cfg.burst_count ? ctrl->cfg.burst_count : 1;
uint32_t payload_len = ctrl->cfg.send_len ? ctrl->cfg.send_len : IPERF_UDP_TX_LEN;
double target_bandwidth_mbps = (double)ctrl->cfg.bw_lim;
if (target_bandwidth_mbps <= 0) target_bandwidth_mbps = 1.0;
double target_bps = target_bandwidth_mbps * 1000000.0;
double total_pps = target_bps / (payload_len * 8.0);
double bursts_per_sec = total_pps / (double)burst_count;
double pacing_interval_us = 1000000.0 / bursts_per_sec;
s_led_state = LED_PURPLE_SOLID; // Transmitting
uint64_t total_len = 0;
uint32_t packet_count = 0;
int64_t start_time_us = esp_timer_get_time();
int64_t next_send_time = start_time_us;
int64_t end_time_us = start_time_us + ((int64_t)ctrl->cfg.time * 1000000LL);
double interval_accum = 0.0;
while (!ctrl->finish && esp_timer_get_time() < end_time_us) {
int64_t current_time = esp_timer_get_time();
if (current_time >= next_send_time) {
for (int k = 0; k < burst_count; k++) {
udp_datagram *header = (udp_datagram *)ctrl->buffer;
gettimeofday(&tv, NULL);
header->id = htonl(packet_count);
header->tv_sec = htonl(tv.tv_sec);
header->tv_usec = htonl(tv.tv_usec);
header->id2 = 0;
if (packet_count == 0) {
client_hdr_v1 *client_hdr = (client_hdr_v1 *)(ctrl->buffer + sizeof(udp_datagram));
client_hdr->flags = htonl(HEADER_VERSION1);
client_hdr->numThreads = htonl(1);
client_hdr->mPort = htonl(ctrl->cfg.dport);
client_hdr->mBufLen = htonl(payload_len);
client_hdr->mWinBand = htonl((int)target_bps);
client_hdr->mAmount = htonl(-(int)(ctrl->cfg.time * 100));
}
int send_len = sendto(sockfd, ctrl->buffer, payload_len, 0, (struct sockaddr *)&addr, sizeof(addr));
if (send_len > 0) {
total_len += send_len;
packet_count++;
} else {
ESP_LOGE(TAG, "UDP send failed: %d", errno);
s_led_state = LED_PURPLE_FLASH;
goto exit_client;
}
}
interval_accum += pacing_interval_us;
int64_t steps = (int64_t)interval_accum;
if (steps > 0) { next_send_time += steps; interval_accum -= steps; }
if (esp_timer_get_time() > next_send_time + 4000) next_send_time = esp_timer_get_time() + (int64_t)pacing_interval_us;
} else {
int64_t wait = next_send_time - current_time;
if (wait > 2000) vTaskDelay(pdMS_TO_TICKS(wait/1000));
}
}
exit_client:
if (s_led_state != LED_PURPLE_FLASH) s_led_state = LED_GREEN_SOLID;
close(sockfd);
return ESP_OK;
}
static void iperf_task(void *arg)
{
iperf_ctrl_t *ctrl = (iperf_ctrl_t *)arg;
if (ctrl->cfg.flag & IPERF_FLAG_TCP) {
if (ctrl->cfg.flag & IPERF_FLAG_SERVER) iperf_start_tcp_server(ctrl);
else iperf_start_tcp_client(ctrl);
} else {
if (ctrl->cfg.flag & IPERF_FLAG_SERVER) iperf_start_udp_server(ctrl);
else iperf_start_udp_client(ctrl);
}
if (ctrl->buffer) { free(ctrl->buffer); ctrl->buffer = NULL; }
if (s_iperf_event_group) { vEventGroupDelete(s_iperf_event_group); s_iperf_event_group = NULL; }
s_iperf_task_handle = NULL;
vTaskDelete(NULL);
}
void iperf_start(iperf_cfg_t *cfg)
{
static bool led_task_started = false;
if (!led_task_started) {
xTaskCreate(status_led_task, "status_led", 2048, NULL, 1, NULL);
led_task_started = true;
}
nvs_handle_t my_handle;
uint8_t enabled = 1;
if (nvs_open("storage", NVS_READONLY, &my_handle) == ESP_OK) {
nvs_get_u8(my_handle, NVS_KEY_IPERF_ENABLE, &enabled);
size_t req;
if (nvs_get_str(my_handle, "mode", NULL, &req) == ESP_OK) {
char m[10]; nvs_get_str(my_handle, "mode", m, &req);
if (strcmp(m, "MONITOR") == 0) s_led_state = LED_BLUE_SOLID;
}
nvs_close(my_handle);
}
if (enabled == 0) return;
if (s_iperf_task_handle != NULL) return;
memcpy(&s_iperf_ctrl.cfg, cfg, sizeof(iperf_cfg_t));
iperf_read_nvs_config(&s_iperf_ctrl.cfg);
s_iperf_ctrl.finish = false;
s_iperf_ctrl.buffer_len = 2048;
s_iperf_ctrl.buffer = malloc(s_iperf_ctrl.buffer_len);
memset(s_iperf_ctrl.buffer, 0, s_iperf_ctrl.buffer_len);
s_iperf_event_group = xEventGroupCreate();
xTaskCreate(iperf_task, "iperf", 4096, &s_iperf_ctrl, IPERF_TRAFFIC_TASK_PRIORITY, &s_iperf_task_handle);
}
void iperf_stop(void) {
if (s_iperf_task_handle != NULL) {
s_iperf_ctrl.finish = true;
if (s_iperf_event_group) xEventGroupSetBits(s_iperf_event_group, IPERF_STOP_REQ_BIT);
}
}
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