mirror of
https://github.com/riba2534/TCP-IP-NetworkNote.git
synced 2026-02-09 21:05:03 +08:00
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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void error_handling(char *message);
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int main(int argc, char *argv[])
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{
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int serv_sock;
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int clnt_sock;
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int str_len, i;
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struct sockaddr_in serv_addr;
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struct sockaddr_in clnt_addr;
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socklen_t clnt_addr_size;
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char msg1[]="Hello client!";
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char msg2[]="I'm server.";
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char msg3[]="Nice to meet you.";
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char* str_arr[]={msg1, msg2, msg3};
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char read_buf[100];
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if(argc!=2){
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printf("Usage : %s <port>\n", argv[0]);
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exit(1);
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}
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serv_sock=socket(PF_INET, SOCK_STREAM, 0);
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if(serv_sock == -1)
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error_handling("socket() error");
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memset(&serv_addr, 0, sizeof(serv_addr));
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serv_addr.sin_family=AF_INET;
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serv_addr.sin_addr.s_addr=htonl(INADDR_ANY);
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serv_addr.sin_port=htons(atoi(argv[1]));
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if(bind(serv_sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr))==-1)
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error_handling("bind() error");
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if(listen(serv_sock, 5)==-1)
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error_handling("listen() error");
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clnt_addr_size=sizeof(clnt_addr);
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clnt_sock=accept(serv_sock, (struct sockaddr*)&clnt_addr,&clnt_addr_size);
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if(clnt_sock==-1)
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error_handling("accept() error");
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for(i=0; i<3; i++)
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{
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//需要写入的字符串的长度
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str_len=strlen(str_arr[i])+1;
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write(clnt_sock, (char*)(&str_len), 4);
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//写入字符串
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write(clnt_sock, str_arr[i], str_len);
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//读取的字符串长度
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read(clnt_sock, (char*)(&str_len), 4);
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//读取的字符串
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read(clnt_sock, read_buf, str_len);
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puts(read_buf);
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}
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close(clnt_sock);
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close(serv_sock);
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return 0;
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}
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void error_handling(char *message)
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{
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fputs(message, stderr);
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fputc('\n', stderr);
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exit(1);
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}
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