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o X'01' general SOCKS server failure
o X'02' connection not allowed by ruleset
o X'03' Network unreachable
o X'04' Host unreachable
o X'05' Connection refused
o X'06' TTL expired
o X'07' Command not supported
o X'08' Address type not supported
o X'09' to X'FF' unassigned
o RSV RESERVED
o ATYP address type of following address
o IP V4 address: X'01'
o DOMAINNAME: X'03'
o IP V6 address: X'04'
o BND.ADDR server bound address
o BND.PORT server bound port in network octet order
Fields marked RESERVED (RSV) must be set to X'00'.
可见,对于返回信息,只须判断第二字节是否为00.若为 00 连接成功,剩下的操作和直连一样,Winsock可直接用SendData 和 GetData 发送\接受数据.
下面介绍需要验证用户名/密码的socks5穿透
第一步还是发送三个字节,只是内容有变,展开来写为: 05 01 02
服务器返回信息也有所不同,正确的返回为 05 02
成功后发送用户/密码信息,请看RFC 说明:
Once the SOCKS V5 server has started, and the client has selected the
Username/Password Authentication protocol, the Username/Password
subnegotiation begins. This begins with the client producing a
Username/Password request:
+----+------+----------+------+----------+
VER ULEN UNAME PLEN PASSWD
+----+------+----------+------+----------+
1 1 1 to 255 1 1 to 255
+----+------+----------+------+----------+
The VER field contains the current version of the subnegotiation,
which is X'01'. The ULEN field contains the length of the UNAME field
that follows. The UNAME field contains the username as known to the
source operating system. The PLEN field contains the length of the
PASSWD field that follows. The PASSWD field contains the password
association with the given UNAME.
The server verifies the supplied UNAME and PASSWD, and sends the
following response:
+----+--------+
VER STATUS
+----+--------+
1 1
+----+--------+
A STATUS field of X'00' indicates success. If the server returns a
`failure' (STATUS value other than X'00') status, it MUST close the
connection. 进入讨论组讨论。
即 发送 01 + 用户名长度(一字节) + 转换成16进制码的用户名 + 密码长度(一字节) + 转换成16进制码的密码,关于如何把用户名和密码转换为10进制Byte数组,请自己看程序.
然后服务器返回两个字节的信息,只须判断第二字节,00 为成功,其余为失败. ![]() ![]() ![]() ![]()
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