- In [1]: import socket
- In [2]: host = 'fe80::20c:29ff:fe47:cf8'
- In [3]: port = 22
- In [4]: res = socket.getaddrinfo(host, port, socket.AF_UNSPEC, socket.SOCK_STREAM)
- In [5]: res
- Out[5]: [(10, 1, 6, '', ('fe80::20c:29ff:fe47:cf8', 22, 0, 0))]
- In [7]: af, sock_type, proto, canonname, sa = res[0]
- In [8]: sock = socket.socket( af, sock_type, proto)
- In [9]: sock.connect( (sa) )
- ---------------------------------------------------------------------------
- error Traceback (most recent call last)
- /home/liaoxinxi/Dropbox/example_code/pylibssh2/src/<ipython-input-9-374898dcad96> in <module>()
- ----> 1 sock.connect( (sa) )
- /usr/lib/python2.7/socket.pyc in meth(name, self, *args)
- 222
- 223 def meth(name,self,*args):
- --> 224 return getattr(self._sock,name)(*args)
- 225
- 226 for _m in _socketmethods:
- error: [Errno 22] Invalid argument
原因:
刚开始以为是参数类型不对,以为传错参数了,(是非法参数,就是说不接受这种值,本来是0,1中选,你却给了个2,就会说非法)。看了下socket.py,print 下出错位置,args是一个tuple,((‘...’,22,0,0),),后来通过直接构造socketv6代码,
In [97]: s = socket.socket(socket.AF_INET6,socket.SOCK_STREAM)
In [98]: host
Out[98]: 'fe80::20c:29ff:fe47:cf8'
In [100]: s.connect((host,port,0,1))#是一个tuple
---------------------------------------------------------------------------
error Traceback (most recent call last)
/home/liaoxinxi/Dropbox/example_code/pylibssh2/src/<ipython-input-100-1da664206f29> in <module>()
----> 1 s.connect((host,port,0,1))
/usr/lib/python2.7/socket.pyc in meth(name, self, *args)
222
223 def meth(name,self,*args):
--> 224 return getattr(self._sock,name)(*args)
225
226 for _m in _socketmethods:
error: [Errno 101] Network is unreachable
把connect中的1参数改为其他就报了invalid argument,就是说传的参数出错了。为什么官方推荐的getaddrinfo函数出错了呢???
通过getaddrinfo无法得到fe80打头的即本地链路ipv6地址,这样的本地链路地址访问都必须带上网卡号,如ping6 'fe80::20c:29ff:fe47:cf8%eth0,返回的的scope_id一直是0,通过这个scope_id(在RFCs中可看到)放connect的话就会报Invalid argument,要访问本地链路的ipv6,必须指定网卡的序列号,或者通过
child = login('fe80::20c:29ff:fe47:cf8%eth0', 'root', 'nsfocus') 在地址上带上网卡号,这是在nss-mdns上的一个bug引起的。
socket([family[, type[, proto]]]) family是地址族,AF_INET6 AF_INET(default), AF_UNIX, type是sock类型,如SOCK_STREAM(default),SOCK_DGRAM.
解决方法:
1,加上网卡序号,但是有个问题,还未解决通过ifconfig 显示的是eth3,但是能够ping6通的确是eth0,只有一个 网卡
2,注意替换不同的关键字去搜索,引起不同的思考
示例代码:
- host
- Out[107]: 'fe80::20c:29ff:fe47:cf8%eth0'
- In [108]: res = socket.getaddrinfo(host, port, socket.AF_UNSPEC, socket.SOCK_STREAM)
- In [109]: res
- Out[109]: [(10, 1, 6, '', ('fe80::20c:29ff:fe47:cf8%eth0', 22, 0, 2))]
- In [111]: af, sock_type, proto, canonname, sa = res[0]
- In [112]: sock = socket.socket(af,sock_type,proto)
- In [113]: sock.connect(sa)
- In [114]:
转载于:https://blog.51cto.com/3502990/1175049