esp-idf/components/lwip/test_apps/main/lwip_test.c

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/*
* SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
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#include <stdio.h>
#include <string.h>
#include <esp_types.h>
#include "freertos/FreeRTOS.h"
#include "freertos/event_groups.h"
#include "test_utils.h"
#include "unity.h"
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#include "unity_fixture.h"
#include "soc/soc_caps.h"
#include "lwip/inet.h"
#include "lwip/netdb.h"
#include "lwip/sockets.h"
#include "lwip/tcpip.h"
#include "lwip/prot/iana.h"
#include "ping/ping_sock.h"
#include "dhcpserver/dhcpserver.h"
#include "dhcpserver/dhcpserver_options.h"
#include "esp_sntp.h"
#define ETH_PING_END_BIT BIT(1)
#define ETH_PING_DURATION_MS (5000)
#define ETH_PING_END_TIMEOUT_MS (ETH_PING_DURATION_MS * 2)
#define TEST_ICMP_DESTINATION_DOMAIN_NAME "127.0.0.1"
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TEST_GROUP(lwip);
TEST_SETUP(lwip)
{
}
TEST_TEAR_DOWN(lwip)
{
}
static void test_on_ping_success(esp_ping_handle_t hdl, void *args)
{
uint8_t ttl;
uint16_t seqno;
uint32_t elapsed_time, recv_len;
ip_addr_t target_addr;
esp_ping_get_profile(hdl, ESP_PING_PROF_SEQNO, &seqno, sizeof(seqno));
esp_ping_get_profile(hdl, ESP_PING_PROF_TTL, &ttl, sizeof(ttl));
esp_ping_get_profile(hdl, ESP_PING_PROF_IPADDR, &target_addr, sizeof(target_addr));
esp_ping_get_profile(hdl, ESP_PING_PROF_SIZE, &recv_len, sizeof(recv_len));
esp_ping_get_profile(hdl, ESP_PING_PROF_TIMEGAP, &elapsed_time, sizeof(elapsed_time));
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printf("%" PRId32 "bytes from %s icmp_seq=%d ttl=%d time=%" PRId32 " ms\n",
recv_len, inet_ntoa(target_addr.u_addr.ip4), seqno, ttl, elapsed_time);
}
static void test_on_ping_timeout(esp_ping_handle_t hdl, void *args)
{
uint16_t seqno;
ip_addr_t target_addr;
esp_ping_get_profile(hdl, ESP_PING_PROF_SEQNO, &seqno, sizeof(seqno));
esp_ping_get_profile(hdl, ESP_PING_PROF_IPADDR, &target_addr, sizeof(target_addr));
printf("From %s icmp_seq=%d timeout\n", inet_ntoa(target_addr.u_addr.ip4), seqno);
}
static void test_on_ping_end(esp_ping_handle_t hdl, void *args)
{
EventGroupHandle_t eth_event_group = (EventGroupHandle_t)args;
uint32_t transmitted;
uint32_t received;
uint32_t total_time_ms;
esp_ping_get_profile(hdl, ESP_PING_PROF_REQUEST, &transmitted, sizeof(transmitted));
esp_ping_get_profile(hdl, ESP_PING_PROF_REPLY, &received, sizeof(received));
esp_ping_get_profile(hdl, ESP_PING_PROF_DURATION, &total_time_ms, sizeof(total_time_ms));
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printf("%" PRId32 " packets transmitted, %" PRId32 " received, time %" PRId32 "ms\n", transmitted, received, total_time_ms);
if (transmitted == received) {
xEventGroupSetBits(eth_event_group, ETH_PING_END_BIT);
}
}
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TEST(lwip, localhost_ping_test)
{
EventBits_t bits;
EventGroupHandle_t eth_event_group = xEventGroupCreate();
TEST_ASSERT(eth_event_group != NULL);
test_case_uses_tcpip();
// Parse IP address: Destination is a localhost address, so we don't need any interface (esp-netif/driver)
ip_addr_t target_addr;
struct addrinfo hint;
struct addrinfo *res = NULL;
memset(&hint, 0, sizeof(hint));
memset(&target_addr, 0, sizeof(target_addr));
/* convert URL to IP */
TEST_ASSERT(getaddrinfo(TEST_ICMP_DESTINATION_DOMAIN_NAME, NULL, &hint, &res) == 0);
struct in_addr addr4 = ((struct sockaddr_in *)(res->ai_addr))->sin_addr;
inet_addr_to_ip4addr(ip_2_ip4(&target_addr), &addr4);
freeaddrinfo(res);
esp_ping_config_t ping_config = ESP_PING_DEFAULT_CONFIG();
ping_config.timeout_ms = 2000;
ping_config.target_addr = target_addr;
ping_config.count = 0; // ping in infinite mode
/* set callback functions */
esp_ping_callbacks_t cbs;
cbs.on_ping_success = test_on_ping_success;
cbs.on_ping_timeout = test_on_ping_timeout;
cbs.on_ping_end = test_on_ping_end;
cbs.cb_args = eth_event_group;
esp_ping_handle_t ping;
TEST_ESP_OK(esp_ping_new_session(&ping_config, &cbs, &ping));
/* start ping */
TEST_ESP_OK(esp_ping_start(ping));
/* ping for a while */
vTaskDelay(pdMS_TO_TICKS(ETH_PING_DURATION_MS));
/* stop ping */
TEST_ESP_OK(esp_ping_stop(ping));
/* wait for end of ping */
bits = xEventGroupWaitBits(eth_event_group, ETH_PING_END_BIT, true, true, pdMS_TO_TICKS(ETH_PING_END_TIMEOUT_MS));
TEST_ASSERT((bits & ETH_PING_END_BIT) == ETH_PING_END_BIT);
/* restart ping */
TEST_ESP_OK(esp_ping_start(ping));
vTaskDelay(pdMS_TO_TICKS(ETH_PING_DURATION_MS));
TEST_ESP_OK(esp_ping_stop(ping));
bits = xEventGroupWaitBits(eth_event_group, ETH_PING_END_BIT, true, true, pdMS_TO_TICKS(ETH_PING_END_TIMEOUT_MS));
TEST_ASSERT((bits & ETH_PING_END_BIT) == ETH_PING_END_BIT);
/* de-initialize ping process */
TEST_ESP_OK(esp_ping_delete_session(ping));
vEventGroupDelete(eth_event_group);
}
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TEST(lwip, dhcp_server_init_deinit)
{
dhcps_t *dhcps = dhcps_new();
TEST_ASSERT_NOT_NULL(dhcps);
ip4_addr_t ip = { .addr = IPADDR_ANY };
TEST_ASSERT(dhcps_start(dhcps, NULL, ip) == ERR_ARG);
TEST_ASSERT(dhcps_stop(dhcps, NULL) == ERR_ARG);
dhcps_delete(dhcps);
}
struct dhcps_api {
EventGroupHandle_t event;
ip4_addr_t netmask;
ip4_addr_t ip;
err_t ret_start;
err_t ret_stop;
};
static void dhcps_test_net_classes_api(void* ctx)
{
struct netif *netif;
struct dhcps_api *api = ctx;
NETIF_FOREACH(netif) {
if (netif->name[0] == 'l' && netif->name[1] == 'o') {
break;
}
}
TEST_ASSERT_NOT_NULL(netif);
dhcps_t *dhcps = dhcps_new();
dhcps_set_option_info(dhcps, SUBNET_MASK, (void*)&api->netmask, sizeof(api->netmask));
api->ret_start = dhcps_start(dhcps, netif, api->ip);
api->ret_stop = dhcps_stop(dhcps, netif);
dhcps_delete(dhcps);
xEventGroupSetBits(api->event, 1);
}
static void dhcps_test_net_classes(uint32_t ip, uint32_t mask, bool pass)
{
struct dhcps_api api = {
.ret_start = ERR_IF,
.ret_stop = ERR_IF,
.ip = {.addr = PP_HTONL(ip)},
.netmask = {.addr = PP_HTONL(mask)},
.event = xEventGroupCreate()
};
tcpip_callback(dhcps_test_net_classes_api, &api);
xEventGroupWaitBits(api.event, 1, true, true, pdMS_TO_TICKS(5000));
vEventGroupDelete(api.event);
err_t ret_start_expected = pass ? ERR_OK : ERR_ARG;
TEST_ASSERT(api.ret_start == ret_start_expected);
TEST_ASSERT(api.ret_stop == ERR_OK);
}
TEST(lwip, dhcp_server_start_stop_localhost)
{
test_case_uses_tcpip();
// Class A: IP: 127.0.0.1, Mask: 255.0.0.0
dhcps_test_net_classes(0x7f000001, 0xFF000000, true);
// Class B: IP: 128.1.1.1, Mask: 255.255.0.0
dhcps_test_net_classes(0x80010101, 0xFFFF0000, true);
// Class C: IP: 192.168.1.1, Mask: 255.255.255.0
dhcps_test_net_classes(0xC0A80101, 0xFFFFFF00, true);
// Class C: IP: 192.168.4.1, Mask: 255.255.0.0
dhcps_test_net_classes(0xC0A80401, 0xFFFF0000, true);
// Class C: IP: 192.168.4.1, Mask: 255.0.0.0
dhcps_test_net_classes(0xC0A80401, 0xFF000000, true);
// Class A: IP: 127.0.0.1, with inaccurate Mask: 255.248.255.0
// expect dhcps_start() to fail
dhcps_test_net_classes(0x7f000001, 0xFFF8FF00, false);
// Class C: IP: 192.168.200.8, with inaccurate Mask: 255.255.255.248
// expect dhcps_start() to fail
dhcps_test_net_classes(0xC0A8C808, 0xFFFFFFF8, false);
}
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int test_sntp_server_create(void)
{
struct sockaddr_in dest_addr_ip4;
int sock = -1;
dest_addr_ip4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
dest_addr_ip4.sin_family = AF_INET;
dest_addr_ip4.sin_port = htons(LWIP_IANA_PORT_SNTP);
sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
TEST_ASSERT_GREATER_OR_EQUAL(0, sock);
int reuse_en = 1;
TEST_ASSERT_GREATER_OR_EQUAL(0, setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &reuse_en, sizeof(reuse_en)));
TEST_ASSERT_GREATER_OR_EQUAL(0, bind(sock, (struct sockaddr*) &dest_addr_ip4, sizeof(dest_addr_ip4)));
return sock;
}
bool test_sntp_server_reply_with_time(int sock, int year, bool msb_flag)
{
struct sntp_timestamp {
uint32_t seconds;
uint32_t fraction;
};
const int SNTP_MSG_LEN = 48;
const int SNTP_MODE_CLIENT = 0x03;
const int SNTP_MODE_SERVER = 0x04;
const int SNTP_MODE_MASK = 0x07;
const int SNTP_OFFSET_STRATUM = 1;
char rx_buffer[SNTP_MSG_LEN];
struct sockaddr_storage source_addr;
socklen_t socklen = sizeof(source_addr);
int len = recvfrom(sock, rx_buffer, SNTP_MSG_LEN, 0, (struct sockaddr *)&source_addr, &socklen);
if (len == SNTP_MSG_LEN && source_addr.ss_family == PF_INET && (SNTP_MODE_MASK & rx_buffer[0]) == SNTP_MODE_CLIENT) {
// modify the client's request to act as a server's response with the injected *xmit* timestamp
rx_buffer[0] &= ~SNTP_MODE_CLIENT;
rx_buffer[0] |= SNTP_MODE_SERVER;
rx_buffer[SNTP_OFFSET_STRATUM] = 0x1;
// set the desired timestamp
struct sntp_timestamp *timestamp = (struct sntp_timestamp *)(rx_buffer + SNTP_MSG_LEN - sizeof(struct sntp_timestamp)); // xmit is the last timestamp in the datagram
int64_t seconds_since_1900 = (365*24*60*60 /* seconds per year */ + 24*60*60/4 /* ~ seconds per leap year */ )*(year-1900);
// apply the MSB convention (set: 1968-2036, cleared: 2036-2104)
timestamp->seconds = htonl( (msb_flag ? 0x80000000 : 0) | (0xFFFFFFFF & seconds_since_1900) );
len = sendto(sock, rx_buffer, SNTP_MSG_LEN, 0, (struct sockaddr *)&source_addr, sizeof(source_addr));
if (len == SNTP_MSG_LEN) {
return true;
}
}
return false;
}
void test_sntp_timestamps(int year, bool msb_flag)
{
int sock = test_sntp_server_create();
// init and start the SNTP
esp_sntp_setoperatingmode(SNTP_OPMODE_POLL);
esp_sntp_setservername(0, "127.0.0.1");
esp_sntp_init();
// wait until time sync
int retry = 0;
while (sntp_get_sync_status() == SNTP_SYNC_STATUS_RESET) {
TEST_ASSERT_TRUE(test_sntp_server_reply_with_time(sock, year, msb_flag)); // post the SNTP server's reply
retry++;
TEST_ASSERT_LESS_THAN(3, retry);
}
// check time and assert the year
time_t now;
struct tm timeinfo;
time(&now);
localtime_r(&now, &timeinfo);
TEST_ASSERT_EQUAL(year, 1900 + timeinfo.tm_year);
// close the SNTP and the fake server
esp_sntp_stop();
close(sock);
}
TEST(lwip, sntp_client_time_2015)
{
test_case_uses_tcpip();
test_sntp_timestamps(2015, true); // NTP timestamp MSB is set for time before 2036
}
TEST(lwip, sntp_client_time_2048)
{
test_case_uses_tcpip();
test_sntp_timestamps(2048, false); // NTP timestamp MSB is cleared for time after 2036
}
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TEST_GROUP_RUNNER(lwip)
{
RUN_TEST_CASE(lwip, localhost_ping_test)
RUN_TEST_CASE(lwip, dhcp_server_init_deinit)
RUN_TEST_CASE(lwip, dhcp_server_start_stop_localhost)
RUN_TEST_CASE(lwip, sntp_client_time_2015)
RUN_TEST_CASE(lwip, sntp_client_time_2048)
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}
void app_main(void)
{
UNITY_MAIN(lwip);
}