python 2.7 - Pysnmp openServerMode with IPv6 -

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i try start snmp agent pysnmp. ipv4 , ipv6 bind, works pretty fine localhost ('127.0.0.1' , '::1')

but when try use other ipv6 ip fetched interface, failed due 

[vagrant@test sources]$ sudo python snmp_agent.py enp0s8 traceback (most recent call last):   file "snmp_agent.py", line 172, in <module>     master_agent_startup(ifname=sys.argv[1])   file "snmp_agent.py", line 101, in master_agent_startup     (get_ipv6_address(interface_name), snmp_agent_port))   file "/usr/lib/python2.7/site-packages/pysnmp/carrier/asyncore/dgram/base.py", line 50, in openservermode     raise error.carriererror('bind() %s failed: %s' % (iface, sys.exc_info()[1],)) pysnmp.carrier.error.carriererror: bind() ('fe80::a00:27ff:fe9e:9c16', 8001) failed: [errno 22] invalid argument

this output interface 'enp0s8':

[vagrant@test sources]$ ifconfig enp0s8 enp0s8: flags=4163<up,broadcast,running,multicast>  mtu 1500         inet 172.20.20.26  netmask 255.255.255.0  broadcast 172.20.20.255         inet6 fe80::a00:27ff:fe9e:9c16  prefixlen 64  scopeid 0x20<link>         ether 08:00:27:9e:9c:16  txqueuelen 1000  (ethernet)         rx packets 874053  bytes 115842841 (110.4 mib)         rx errors 0  dropped 0  overruns 0  frame 0         tx packets 862314  bytes 114652475 (109.3 mib)         tx errors 0  dropped 0 overruns 0  carrier 0  collisions 0

this code piece used ipv6 bind:

def get_ipv6_address(ifname):     return netifaces.ifaddresses(ifname)[netifaces.af_inet6][0]['addr'].split('%')[0]  config.addsockettransport(snmpengine, udp.domainname,                           udp.udptransport().openservermode(                               (get_ipv4_address(interface_name), snmp_agent_port))                           ) config.addsockettransport(snmpengine, udp6.domainname,                           udp6.udp6sockettransport().openservermode(                               (get_ipv6_address(interface_name), snmp_agent_port))                           )

from pysnmp sample, seems parameter inside "openservermode()" tuple of ip , port. , output error suppose there no error given ip , port. why failed due invalid argument? @ilya etingof or other pysnmp expert me it?

thanks.

update: try bind given suggestion, still doesn't work. bind command run new installed centos. still failed: [root@test ~]# ifconfig

eth1: flags=4163<up,broadcast,running,multicast>  mtu 1500         inet 10.10.20.4  netmask 255.255.255.0  broadcast 10.10.20.255         inet6 fe80::f816:3eff:fee1:5475  prefixlen 64  scopeid 0x20<link>         ether fa:16:3e:e1:54:75  txqueuelen 1000  (ethernet)         rx packets 12242  bytes 962552 (939.9 kib)         rx errors 0  dropped 0  overruns 0  frame 0         tx packets 12196  bytes 957826 (935.3 kib)         tx errors 0  dropped 0 overruns 0  carrier 0  collisions 0  [root@test ~]# python python 2.7.5 (default, oct 11 2015, 17:47:16) [gcc 4.8.3 20140911 (red hat 4.8.3-9)] on linux2 type "help", "copyright", "credits" or "license" more information. >>> import socket >>> s = socket.socket(socket.af_inet6, socket.sock_dgram, 0) >>> addr_and_port = ('fe80::f816:3eff:fedb:ba4f', 8001) >>> s.bind(addr_and_port) traceback (most recent call last):   file "<stdin>", line 1, in <module>   file "/usr/lib64/python2.7/socket.py", line 224, in meth     return getattr(self._sock,name)(*args) socket.error: [errno 22] invalid argument >>> [1]+  stopped                 python [root@test ~]# netstat -anp | grep 8001 [root@test ~]#

one more update: suppose bind failed due environment has issue ipv6 configuration. i'm able 1 ipv4 address using "socket.getaddrinfo()" method.

br, -dapeng jiao

you error if attempted bind same socket more once. can't see case in code.

that .openservermode() method no magic -- calls .bind() on socket object. inspiration, work in @ python prompt?

from pysnmp.carrier.asyncore.dgram import udp6  addr_and_port = ('fe80::a00:27ff:fe9e:9c16', 8001) udp6.udp6sockettransport().openservermode(addr_and_port)

or even:

import socket  s = socket.socket(socket.af_inet6, socket.sock_dgram, 0) addr_and_port = ('fe80::a00:27ff:fe9e:9c16', 8001) s.bind(addr_and_port)

my hope tests these may figuring out problem...


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