linux C 套接字编程 有个地方不懂 求指教,该如何解决
linux C 套接字编程 有个地方不懂 求指教
代码所做的事：在客户端定义一个字符'A'，在服务器端将其加1，然后在客户端输出。代码没有错误。
客户端代码：
服务器端代码：
代码所做的事：在客户端定义一个字符'A'，在服务器端将其加1，然后在客户端输出。代码没有错误。
客户端代码：
1 #include <sys/types.h>
2 #include <sys/socket.h>
3 #include <stdio.h>
4 #include <sys/un.h>
5 #include <unistd.h>
6 #include <stdlib.h>
7
8 int main()
9 {
10 int sockfd;
11 int len;
12 struct sockaddr_un address;
13 int result;
14 char ch = 'A';
15
16 sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
17 address.sun_family = AF_UNIX;
18 strcpy(address.sun_path, "server_socket");
19 len = sizeof(address);
20
21 result = connect(sockfd, (struct sockaddr *)&address, len);
22 if (result == -1)
23 {
24 perror("oops:client1");
25 exit(1);
26 }
27 write(sockfd, &ch, 1);
28 printf("char from server = %c\n", ch);
29 read(sockfd, &ch, 1);
30 printf("char from server = %c\n", ch);
31 close(sockfd);
32 exit(0);
33
34 }
~
服务器端代码：
1 #include <sys/types.h>
2 #include <sys/socket.h>
3 #include <stdio.h>
4 #include <stdlib.h>
5 #include <sys/un.h>
6 #include <unistd.h>
7
8 int main()
9 {
10 int server_sockfd, client_sockfd;
11 int server_len, client_len;
12 struct sockaddr_un server_address;
13 struct sockaddr_un client_address;
14
15 unlink("server_socket");
16 server_sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
17
18 server_address.sun_family = AF_UNIX;
19 strcpy(server_address.sun_path, "server_socket");
20 server_len = sizeof(server_address);
21 bind(server_sockfd, (struct sockaddr *)&server_address, server_len);
22
23 listen(server_sockfd, 5);
24 while(1)
25 {
26 char c;
27 printf("sever waiting\n");
28
29 client_len = sizeof(client_address);
30 client_sockfd= accept(server_sockfd, (struct sockaddr *)&client_address, &client_len);
31
32 read(client_sockfd, &c, 1);