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Created on 2011-02-19 03:54 by dmahn, last changed 2022-04-11 14:57 by admin. This issue is now closed.
| Files | ||||
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| File name | Uploaded | Description | Edit | |
| mtest1.py | casevh, 2011-02-19 06:17 | |||
| Messages (6) | |||
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| msg128827 - (view) | Author: Dan Mahn (dmahn) | Date: 2011-02-19 03:57 | |
Can't send UDP packet to multicast address. See traceback.
s.sendto( bytearray, ("227.5.6.7", 6543))
socket.error: [Errno 10065] A socket operation was attempted to an unreachable host
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| msg128828 - (view) | Author: Dan Mahn (dmahn) | Date: 2011-02-19 03:57 | |
This has occurred in RC3 |
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| msg128831 - (view) | Author: Case Van Horsen (casevh) | Date: 2011-02-19 06:17 | |
I tested multicast without any issues using the attached script. I used RC3 on both Windows 7 and Linux. I did need to disable the firewall on my Windows system before multicast would work. Start one or more clients using: "python mtest1.py client" Send data using: "python mtest1.py server hello 10" |
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| msg128839 - (view) | Author: Charles-François Natali (neologix) *  |
Date: 2011-02-19 10:36 | |
Are you using a default gateway ? Are you sure this gateway supports multicast ? See for example http://www.sockets.com/err_lst1.htm#WSAENETUNREACH : """ WSAENETUNREACH (10051) Network is unreachable. Berkeley description: A socket operation was attempted to an unreachable network. WinSock description: Almost same as Berkeley. For WinSock, this error is equivalent to Berkeley's EHOSTUNREACH error, the catch-all error for unreachable hosts. "You can't get there from here." TCP/IP scenario: The local network system could generate this error if there isn't a default route configured. Typically, though, WinSock generates this error when it receives a "host unreachable" ICMP message from a router. The ICMP message means that a router can't forward the IP datagram, possibly because it didn't get a response to the ARP request (which might mean the destination host is down). Note: this error may also result if you are trying to send a multicast packet and the default gateway does not support multicast (check your interface configuration). """ By the way, when you submit this kind of issue, it's a lot easier to analyse if you provide a sample code. |
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| msg134591 - (view) | Author: Charles-François Natali (neologix) * |
Date: 2011-04-27 16:10 | |
Suggesting to close. |
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| msg134796 - (view) | Author: Charles-François Natali (neologix) * |
Date: 2011-04-29 17:24 | |
Closing as invalid, since it's definitely not a Python issue, but much more likely a network configuration problem. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:13 | admin | set | github: 55456 |
| 2011-04-29 17:24:54 | neologix | set | status: open -> closed resolution: not a bug messages: + msg134796 |
| 2011-04-27 16:10:09 | neologix | set | nosy:
+ giampaolo.rodola messages: + msg134591 |
| 2011-02-19 10:36:14 | neologix | set | nosy:
+ neologix messages: + msg128839 |
| 2011-02-19 06:17:44 | casevh | set | files:
+ mtest1.py nosy: + casevh messages: + msg128831 |
| 2011-02-19 03:57:28 | dmahn | set | messages: + msg128828 |
| 2011-02-19 03:57:03 | dmahn | set | versions:
+ Python 3.2 title: e -> Error sending packets to multicast IPV4 address messages: + msg128827 components: + None type: behavior |
| 2011-02-19 03:54:55 | dmahn | create | |