近日小弟做了個linux下使用者資料報協議大檔案傳輸程式發上來與大家共勉。
**在 redhat 9.0 下編譯通過。
最大測試無差錯傳輸檔案：288m
最大測試傳輸速度：6.5m/s
可能這裡並不需要這種型別的帖子，但希望各位能代小弟轉貼，因為網路上很難搜尋到這種可以解決丟包問題的**級實現方法，希望每乙個需要的人都能看的到。
伺服器端：
#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)
else if(ret==0)
if(fd_isset(sockfd,&rdset))
if(!strcmp(mesg,"end"))
wlen = write(fd,mesg,rlen);
if(wlen != rlen )
}printf("the %d times write\n",i);
}close(fd);
}int main(int argc, char *argv)
r = fcntl(sockfd, f_getfl, 0);
fcntl(sockfd, f_setfl, r & ~o_nonblock);
recvudp(argv[1],sockfd);
return 0;
客戶端：
#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)
else
printf("connect server ok!\n");
fd = open(name,o_rdonly);
if(fd==-1)
i=0;
while(1)
else if(ret==0)
memset(buf,0,max_size);
if(fd_isset(sockfd,&wrset))
else if(rlen==0)
printf("all complete\n");
close(fd);
close(sockfd);
exit(0);
}wlen = write(sockfd,buf,rlen);
if(wlen != rlen)
i++;
usleep(500);
printf("the %d times read\n",i);}}
}int main(int argc ,char *argv)
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) <= 0)
fh = argv[2];
sockfd =socket(af_inet,sock_dgram,0);
r = fcntl(sockfd, f_getfl, 0);
fcntl(sockfd, f_setfl, r & ~o_nonblock);
connectudp(argv[2],sockfd,(struct sockaddr *)&servaddr,sizeof(servaddr));
fprintf(stderr,"serverip:\t%s\n",argv[1]);
if(stat(argv[2],&fsize) == -1)
perror("failed to get fiel statusi\n");
else
fprintf(stderr,"file name:\t%s\nfile size:\t%dk\n",argv[2],fsize.st_size/1024);
error2=sysinfo(&s_info);
time2 = s_info.uptime;
printf("tranfice file time =%fs\n",(time2-time1));
}
makefile
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
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