1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
#include "network.h"
#include "esp_log.h"
#include "esp_log_level.h"
#include "esp_netif.h"
#include "esp_netif_ip_addr.h"
#include "esp_netif_types.h"
#include "esp_wifi_default.h"
#include "esp_wifi_types_generic.h"
#include "config.h"
#include "freertos/idf_additions.h"
#include "freertos/projdefs.h"
#include <netdb.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#define TAG "sprayduck"
static EventGroupHandle_t s_wifi_event_group;
static esp_netif_ip_info_t* ip_address = NULL;
void wifi_event_handler(void* handler_arg, esp_event_base_t base, int32_t id, void* event_data) {
if (base != WIFI_EVENT) {
return;
}
if (id == WIFI_EVENT_STA_START) {
// If station mode has started successfully, attempt a connection
ESP_LOGI(TAG, "Connecting...");
ESP_ERROR_CHECK(esp_wifi_connect());
ESP_LOGI(TAG, "CONNECTED...");
} else if (id == WIFI_EVENT_STA_DISCONNECTED) {
// If we disconnected, attempt a reconnect
ESP_LOGI(TAG, "Attempting reconnection...");
ESP_ERROR_CHECK(esp_wifi_connect());
// Mark connection as not ready
xEventGroupClearBits(s_wifi_event_group, BIT0);
ip_address = NULL;
}
}
void ip_event_handler(void* handler_arg, esp_event_base_t base, int32_t id, void* event_data) {
if (base != IP_EVENT) {
return;
}
if (id == IP_EVENT_STA_GOT_IP) {
// Got IP
ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
// Mark connection as ready
xEventGroupSetBits(s_wifi_event_group, BIT0);
ip_address = &event->ip_info;
}
}
void setup_network() {
// Event group to be notified when ready to connect
s_wifi_event_group = xEventGroupCreate();
xEventGroupClearBits(s_wifi_event_group, BIT0);
// Set logging level to verbose
esp_log_level_set("sprayduck", ESP_LOG_VERBOSE);
// Setup TCP/IP stack - create event loop which registers events from TC/IP
// stack
esp_netif_init();
// We must create the event loop before anything because the drivers need to
// register system handlers, which require the event loop
esp_event_loop_create_default();
// Setup Wi-fi driver, configured in Station (client) mode This step involves
// attaching system handlers to the above created default event loop. This
// must be done before attaching any user event handlers because this has
// higer priority
esp_netif_create_default_wifi_sta();
// Configuration for how the wifi will be setup
wifi_init_config_t config = WIFI_INIT_CONFIG_DEFAULT();
// Disable nvs memory, not needed
config.nvs_enable = 0;
// Initalize above declared wifi configuration This initalizes the wifi
// driver, and starts the driver task
ESP_ERROR_CHECK(esp_wifi_init(&config));
//Set to station mode
ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
// Connect to AP with provided SSID and PASSWORD
wifi_sta_config_t sta_config = {
.ssid = SSID,
.password = PASSWORD,
};
// Apply above define configuration
ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, (wifi_config_t*) &sta_config));
esp_event_handler_instance_t instance_any_id;
esp_event_handler_instance_t instance_got_ip;
// All Wifi related events are handled here
ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
ESP_EVENT_ANY_ID,
&wifi_event_handler,
NULL,
&instance_any_id));
// All IP related events are handled here
ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
IP_EVENT_STA_GOT_IP,
&ip_event_handler,
NULL,
&instance_got_ip));
// Start the client
ESP_ERROR_CHECK(esp_wifi_start());
}
void send_packet(char* data) {
ESP_LOGI(TAG, "Sending packet");
EventBits_t bits = xEventGroupGetBits(s_wifi_event_group);
// We are connected and have a valid ip_address
if (bits & BIT0 && ip_address != NULL) {
ESP_LOGI(TAG, "Have IP, Sending packet");
// char ip[20];
// sprintf(ip, IPSTR, IP2STR(&ip_address->ip));
int sock;
struct addrinfo hints, *p, *res;
memset(&hints, 0, sizeof hints);
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
if (getaddrinfo(SERVER_IP, SERVER_PORT, &hints, &res) != 0) {
return;
}
if ((sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) ==
-1) {
fprintf(stderr, "%s: socket (%d): %s\n", TAG, errno, strerror(errno));
return ;
}
if (connect(sock, res->ai_addr, res->ai_addrlen) == -1) {
fprintf(stderr, "%s: connect (%d): %s\n", TAG, errno, strerror(errno));
return ;
}
int len = strlen(data);
int bytes_sent = 0;
int total_bytes_sent = 0;
while (1) {
if ((bytes_sent = send(sock, data, len, 0)) == -1) {
fprintf(stderr, "%s: send (%d): %s\n", TAG, errno, strerror(errno));
return ;
}
total_bytes_sent += bytes_sent;
if (bytes_sent == len) {
break;
}
}
close(sock);
freeaddrinfo(res);
return ;
}
}
|
