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linux下用户数据报协议大文件传输
代码在 redhat下编译通过。
最大测试无差错传输文件:288M
最大测试传输速度:6.5M/S
包含了可以解决丢包问题的代码级实现方法。
服务器端:
CODE:
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#define SERV_PORT 2500
#define MAX_SIZE 1024*40
void recvUDP(char name[20],int sockfd)
{
int ret,fd;
mode_t fdmode = (S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
char mesg[MAX_SIZE];
fd_set rdset;
struct timeval tv;
int rlen,wlen;
int i;
fd = open(name,O_RDWR|O_CREAT|O_APPEND,fdmode);
if(fd == -1)
{
printf("open file %s error:%n",name,strerror(errno));
exit(-1);
}
for(i=0;;i++)
{
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&rdset);
FD_SET(sockfd,&rdset);
ret = select(sockfd+1,&rdset,NULL,NULL,&tv);
if(ret == -1)
{
printf("select error %s\n",strerror(errno));
exit(-1);
}
else if(ret==0)
{
printf("select timeout,continue circle\n");
continue;
}
if(FD_ISSET(sockfd,&rdset))
{
memset(mesg,0,MAX_SIZE);
rlen = read(sockfd,mesg,MAX_SIZE);
if(rlen
客户端:
CODE:
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#include;
#define MAX_SIZE 1024*40
#define SERV_PORT 2500
void connectUDP(char name[20],int sockfd,struct sockaddr *pservaddr,socklen_t servlen)
{
char buf[MAX_SIZE];
fd_set wrset;
struct timeval tv;
int rlen,wlen;
int fd;
int ret;
int i;
if(connect(sockfd,(struct sockaddr *)pservaddr,servlen) == -1)
{
perror("connet error");
exit(1);
}
else
printf("connect server ok!\n");
fd = open(name,O_RDONLY);
if(fd==-1)
{
printf("fopen error %s\n",strerror(errno));
exit(-1);
}
i=0;
while(1)
{
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&wrset);
FD_SET(sockfd,&wrset);
ret = select(sockfd+1,NULL,&wrset,NULL,&tv);
if(ret == -1)
{
printf("select error %s\n",strerror(errno));
exit(-1);
}
else if(ret==0)
{
printf("select timeout,continue circle\n");
continue;
}
memset(buf,0,MAX_SIZE);
if(FD_ISSET(sockfd,&wrset))
{
rlen = read(fd,buf,MAX_SIZE);
if(rlen ;\n");
exit(1);
}
bzero(&servaddr,sizeof(servaddr));
servaddr.sin_family= AF_INET;
servaddr.sin_port = htons(SERV_PORT);
if(inet_pton(AF_INET,argv[1],&servaddr.sin_addr)
Makefile
CODE:
all:send recv
send:send.c
gcc -Wall send.c -o send
recv:recv.c
gcc -Wall recv.c -o recv
clean:
rm -rf send recv
本文来自ChinaUnix博客,如果查看原文请点:http://blog.chinaunix.net/u/26185/showart_474463.html |
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