-
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
-
-
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
]:
解决[Errno 22] Invalid argumentIn[1]:importsocketIn[2]:host='fe80::20c:29ff:fe47:cf8'In[3]:port=22In[4]:res=socket.getaddrinfo(host,port,socket.AF_UNSPEC,so...
