1 #include <rtthread.h>
2
3 #include <sys/socket.h> /* 使用BSD socket，需要包含sockets.h头文件 */
4 #include "netdb.h"
5
6 #define DEBUG_UDP_CLIENT
7
8 #define DBG_ENABLE
9 #define DBG_SECTION_NAME "UDP"
10 #ifdef DEBUG_UDP_CLIENT
11 #define DBG_LEVEL DBG_LOG
12 #else
13 #define DBG_LEVEL DBG_INFO /* DBG_ERROR */
14 #endif
15 #define DBG_COLOR
16 #include <rtdbg.h>
17
18 static int started = 0;
19 static int is_running = 0;
20 static char url[256];
21 static int port = 8080;
22 static int count = 10;
23 const char send_data[] = "This is UDP Client from RT-Thread.\n"; /* 发送用到的数据 */
24
udpclient(void * arg)25 static void udpclient(void *arg)
26 {
27 int sock;
28 struct hostent *host;
29 struct sockaddr_in server_addr;
30
31 /* 通过函数入口参数url获得host地址（如果是域名，会做域名解析） */
32 host = (struct hostent *) gethostbyname(url);
33 if (host == RT_NULL)
34 {
35 LOG_E("Get host by name failed!");
36 return;
37 }
38
39 /* 创建一个socket，类型是SOCK_DGRAM，UDP类型 */
40 if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
41 {
42 LOG_E("Create socket error");
43 return;
44 }
45
46 /* 初始化预连接的服务端地址 */
47 server_addr.sin_family = AF_INET;
48 server_addr.sin_port = htons(port);
49 server_addr.sin_addr = *((struct in_addr *)host->h_addr);
50 rt_memset(&(server_addr.sin_zero), 0, sizeof(server_addr.sin_zero));
51
52 started = 1;
53 is_running = 1;
54
55 /* 总计发送count次数据 */
56 while (count && is_running)
57 {
58 /* 发送数据到服务远端 */
59 sendto(sock, send_data, rt_strlen(send_data), 0,
60 (struct sockaddr *)&server_addr, sizeof(struct sockaddr));
61
62 /* 线程休眠一段时间 */
63 rt_thread_mdelay(1000);
64
65 /* 计数值减一 */
66 count --;
67 }
68
69 if (count == 0)
70 {
71 LOG_I("UDP client send data finished!");
72 }
73
74 /* 关闭这个socket */
75 if (sock >= 0)
76 {
77 closesocket(sock);
78 sock = -1;
79 }
80 started = 0;
81 is_running = 0;
82 }
83
usage(void)84 static void usage(void)
85 {
86 rt_kprintf("Usage: udpclient -h <host> -p <port> [--cnt] [count]\n");
87 rt_kprintf(" udpclient --stop\n");
88 rt_kprintf(" udpclient --help\n");
89 rt_kprintf("\n");
90 rt_kprintf("Miscellaneous:\n");
91 rt_kprintf(" -h Specify host address\n");
92 rt_kprintf(" -p Specify the host port number\n");
93 rt_kprintf(" --cnt Specify the send data count\n");
94 rt_kprintf(" --stop Stop tcpclient program\n");
95 rt_kprintf(" --help Print help information\n");
96 }
97
udpclient_test(int argc,char ** argv)98 static void udpclient_test(int argc, char** argv)
99 {
100 rt_thread_t tid;
101
102 if (argc == 1 || argc > 7)
103 {
104 LOG_I("Please check the command you entered!\n");
105 goto __usage;
106 }
107 else
108 {
109 if (rt_strcmp(argv[1], "--help") == 0)
110 {
111 goto __usage;
112 }
113 else if (rt_strcmp(argv[1], "--stop") == 0)
114 {
115 is_running = 0;
116 return;
117 }
118 else if (rt_strcmp(argv[1], "-h") == 0 && rt_strcmp(argv[3], "-p") == 0)
119 {
120 if (started)
121 {
122 LOG_I("The tcpclient has started!");
123 LOG_I("Please stop tcpclient firstly, by: tcpclient --stop");
124 return;
125 }
126
127 if (argc == 7 && rt_strcmp(argv[6], "--cnt") == 0)
128 {
129 count = atoi(argv[7]);
130 }
131
132 if (rt_strlen(argv[2]) > sizeof(url))
133 {
134 LOG_E("The input url is too long, max %d bytes!", sizeof(url));
135 return;
136 }
137 rt_memset(url, 0x0, sizeof(url));
138 rt_strncpy(url, argv[2], rt_strlen(argv[2]));
139 port = atoi(argv[4]);
140 }
141 else
142 {
143 goto __usage;
144 }
145 }
146
147 tid = rt_thread_create("udp_client",
148 udpclient, RT_NULL,
149 2048, RT_THREAD_PRIORITY_MAX/3, 20);
150 if (tid != RT_NULL)
151 {
152 rt_thread_startup(tid);
153 }
154 return;
155
156 __usage:
157 usage();
158 }
159
160 #ifdef RT_USING_FINSH
161 MSH_CMD_EXPORT_ALIAS(udpclient_test, udpclient,
162 Start a udp client. Help: udpclient --help);
163 #endif
164