A mini linux ftpd developed in C program language on ubuntu 12.04, it is a multi-process framework server.
如果发现PORT与PASV模式无法工作，可能原因是无法准确获取本地IP地址。可以尝试下面这种方法获取ip。
int getlocalip(const char *ip)
{
int sockfd;
if(-1 == (sockfd = socket(PF_INET, SOCK_STREAM, 0)))
{
perror( "socket" );
return -1;
}
struct ifreq req;
struct sockaddr_in *host;
bzero(&req, sizeof(struct ifreq));
strcpy(req.ifr_name, "eth0");
ioctl(sockfd, SIOCGIFADDR, &req);
host = (struct sockaddr_in*)&req.ifr_addr;
strcpy(ip, inet_ntoa(host->sin_addr));
close(sockfd);
return 1;
}