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server.cpp
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server.cpp
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#define BUFF_SIZE 1024
void error_handling(const char *message);
int main(int argc,char *argv[])
{
int serv_sock; //服务端套接字
int clnt_sock; //客户端套接字
struct sockaddr_in serv_addr;
struct sockaddr_in clnt_addr;
socklen_t clnt_addr_size;
char message[BUFF_SIZE];
char file_name[30];
int read_len;
FILE *file;
long long FILE_SIZE;
if(argc!=2){
printf("Usage:%s<port>\n",argv[0]);
exit(1);
}
serv_sock=socket(PF_INET,SOCK_STREAM,0);
if(serv_sock==-1){
error_handling("error serv_sock");
}
memset(&serv_addr,0,sizeof(serv_addr));
serv_addr.sin_family=AF_INET;
serv_addr.sin_addr.s_addr=htonl(INADDR_ANY);
serv_addr.sin_port=htons(atoi(argv[1]));
if(bind(serv_sock,(struct sockaddr*)&serv_addr,sizeof(serv_addr))==-1)
error_handling("bind()error");
if(listen(serv_sock,5)==-1)
error_handling("listen() error");
clnt_addr_size=sizeof(clnt_addr);
clnt_sock=accept(serv_sock,(struct sockaddr*)&clnt_addr,&clnt_addr_size);
if(clnt_sock==-1)
error_handling("accept() error");
memset(file_name,0,sizeof(file_name));
read_len=read(clnt_sock,file_name,sizeof(file_name)-1);
file_name[read_len]=0;
file=fopen(file_name, "r");
if (file == NULL){
printf("File:\t%s Not Found!\n", file_name);
exit(1);
}
while(1){
memset(message,0,BUFF_SIZE);
int file_length = fread(message, sizeof(char), BUFF_SIZE, file);
if(file_length<BUFF_SIZE){
write(clnt_sock,message,file_length);
break;
}
write(clnt_sock,message,BUFF_SIZE);
}
shutdown(clnt_sock,SHUT_WR);
memset(message,0,BUFF_SIZE);
read(clnt_sock,message,sizeof(message));
printf("message from client: %s\n",message);
fclose(file);
close(clnt_sock);
close(serv_sock);
return 0;
}
void error_handling(const char *message){
fputs(message,stderr);
fputc('\n',stderr);
exit(1);
}