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
|
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <assert.h>
#include <fcntl.h> // Flags for open()
#include <sys/stat.h> // Open() system call
#include <sys/types.h> // Types for open()
#include <unistd.h> // Close() system call
#include <string.h> // Memory setting and copying
#include <getopt.h> // Option parsing
#include <errno.h> // Error codes
#include<sys/socket.h>
#include<netinet/in.h>
#include <pthread.h>
#define DEFAULT_PORT 7
#define MAXLINE 4096
int socket_fd, connect_fd;
int flag1;
struct test {
int flag1;
};
/*----------------------------------------------------------------------------
* DMA File Transfer Functions
*----------------------------------------------------------------------------*/
void *receive_file(void *arg)
{
struct test *my = (struct test *)arg;
while (1) {
if (my->flag1 == 1) {
printf("test1\n");
} else if (my->flag1 == 2) {
printf("test2\n");
}
sleep(1);
}
// pthread_exit(NULL);
return NULL;
}
/*----------------------------------------------------------------------------
* Main
*----------------------------------------------------------------------------*/
int main(void)
{
// Socket相关变量
struct sockaddr_in servaddr;
unsigned char buff[MAXLINE];
int n;
int err;
pthread_t tid;
struct test *ts = (struct test *)malloc(sizeof(struct test));
ts->flag1 = 0;
//初始化Socket
if( (socket_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1 ) {
printf("create socket error: %s(errno: %d)\n",strerror(errno),errno);
exit(0);
}
// 解决 Address already in use 问题
int opt = 1;
setsockopt(socket_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
//初始化
memset(&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_addr.s_addr = htonl(INADDR_ANY);//IP地址设置成INADDR_ANY,让系统自动获取本机的IP地址。
servaddr.sin_port = htons(DEFAULT_PORT);//设置的端口为DEFAULT_PORT
//将本地地址绑定到所创建的套接字上
if( bind(socket_fd, (struct sockaddr*)&servaddr, sizeof(servaddr)) == -1) {
printf("bind socket error: %s(errno: %d)\n",strerror(errno),errno);
exit(0);
}
//开始监听是否有客户端连接
if( listen(socket_fd, 2) == -1) {
printf("listen socket error: %s(errno: %d)\n",strerror(errno),errno);
exit(0);
}
printf("======waiting for client's request======\n");
// 启动线程
if ((err = pthread_create(&tid, NULL, &receive_file, ts)) != 0) {
printf("err = %d, can't create thread", err);
}
pthread_detach(tid); //分离线程，避免僵尸进程
while (1) {
//阻塞直到有客户端连接，不然多浪费CPU资源。
if( (connect_fd = accept(socket_fd, (struct sockaddr*)NULL, NULL)) == -1) {
printf("accept socket error: %s(errno: %d)",strerror(errno),errno);
continue;
}
while (1) {
//接受客户端传过来的数据
n = recv(connect_fd, buff, MAXLINE, 0);
if(n > 0) {
// 判断是开始还是停止
if (buff[0] == 0xFA && buff[7] == 0x01) {
ts->flag1 = 1;
printf("start\n");
}
else if (buff[0] == 0xFA && buff[7] == 0x02) {
ts->flag1 = 2;
// 停止
printf("stop\n");
} else if (buff[0] == 0xFA && buff[7] == 0x03) {
ts->flag1 = 3;
}
} else {
close(connect_fd);
break;
}
}
usleep(100);
}
close(connect_fd);
close(socket_fd);
return 0;
}
|