-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathsocket_option_test.cpp
More file actions
87 lines (73 loc) · 2.51 KB
/
socket_option_test.cpp
File metadata and controls
87 lines (73 loc) · 2.51 KB
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
/**
* ==================================================
* @file udp_client.cpp
* @brief 常用socket选项设置的示例代码
* @author ywj
* @date 2025-06-18 22:36
* @version 1.0
* @copyright Copyright (c) 2025 ywj. All Rights Reserved.
* ==================================================
*/
//注意：设置端口复用/地址复用的时候要在bind之前设置
// 设置接受缓冲区/发送缓冲区的时候要在listen之前设置
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int main() {
int sockfd;
struct sockaddr_in addr;
// 创建 TCP 套接字
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
perror("socket creation failed");
exit(EXIT_FAILURE);
}
// 设置 SO_REUSEADDR 和 SO_REUSEPORT
int enable = 1;
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable)) < 0) {
perror("setsockopt(SO_REUSEADDR) failed");
close(sockfd);
exit(EXIT_FAILURE);
}
if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEPORT, &enable, sizeof(enable)) < 0) {
perror("setsockopt(SO_REUSEPORT) failed");
close(sockfd);
exit(EXIT_FAILURE);
}
// 设置接收缓冲区大小（单位：字节）
int rcvbuf = 256 * 1024; // 256 KB
if (setsockopt(sockfd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(rcvbuf)) < 0) {
perror("setsockopt(SO_RCVBUF) failed");
close(sockfd);
exit(EXIT_FAILURE);
}
// 设置发送缓冲区大小（单位：字节）
int sndbuf = 256 * 1024; // 256 KB
if (setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)) < 0) {
perror("setsockopt(SO_SNDBUF) failed");
close(sockfd);
exit(EXIT_FAILURE);
}
// 绑定地址与端口
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("192.168.0.100"); // 替换为你的 IP
addr.sin_port = htons(8888); // 指定监听端口
if (bind(sockfd, (const struct sockaddr *)&addr, sizeof(addr)) < 0) {
perror("bind failed");
close(sockfd);
exit(EXIT_FAILURE);
}
printf("Socket configured successfully: address/port reuse enabled, buffer size set.\n");
// 监听（仅用于 TCP）
listen(sockfd, 5);
printf("Listening on port 8888...\n");
// 程序保持运行（演示用）
pause();
close(sockfd);
return 0;
}