ftp的9种登录方式???请高手赐教
这里有代码
http://topic.csdn.net/t/20060725/08/4902223.html
其中的
int logonseq[NUMLOGIN][100] = {
// 下面的数组保存了针对不同防火墙的登录序列
{0,LO,3, 1,LO,6, 2,LO,ER}, // 没有防火墙
{3,6,3, 4,6,ER, 5,ER,9, 0,LO,12, 1,LO,15, 2,LO,ER}, // 主机名
{3,6,3, 4,6,ER, 6,LO,9, 1,LO,12, 2,LO,ER}, // USER after logon
{7,3,3, 0,LO,6, 1,LO,9, 2,LO,ER}, //proxy OPEN
{3,6,3, 4,6,ER, 0,LO,9, 1,LO,12, 2,LO,ER}, // Transparent
{6,LO,3, 1,LO,6, 2,LO,ER}, // USER with no logon
{8,6,3, 4,6,ER, 0,LO,9, 1,LO,12, 2,LO,ER}, //USER fireID@remotehost
{9,ER,3, 1,LO,6, 2,LO,ER}, //USER remoteID@remotehost fireID
{10,LO,3, 11,LO,6, 2,LO,ER} // USER remoteID@fireID@remotehost
};
有点不明白,LO,ER分别代表什么?这些数字又为何?为什么要这样?