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plurals

PO
primarykey
Id
12175937
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
1
CommunityOwnedDate
CreationDate
2012-08-29T10:31:54.080
FavoriteCount
0
LastActivityDate
2013-01-31T22:03:09.520
LastEditDate
2013-01-31T22:03:09.520
LastEditorUserId
1283052
OwnerUserId
1283052
ParentId
10499865
PostTypeId
2
Score
13
ViewCount
0
LastEditorDisplayName
text
Body
I solved my problem a few months ago. Here's the solution I used. The standard packet-sending API (sock_create, connect, ...) cannot be used in a few contexts (interruptions). Using it in the wrong place leads to a KP. The netpoll API is more "low-level" and works in every context. However, there are several conditions : <ul> <li>Ethernet devices</li> <li>IP network</li> <li>UDP only (no TCP)</li> <li>Different computers for sending and receiving packets (You can't send to yourself.)</li> </ul> Make sure to respect them, because you won't get any error message if there's a problem. It will just silently fail :) Here's a bit of code. Declaration <pre><code>#include <linux/netpoll.h> #define MESSAGE_SIZE 1024 #define INADDR_LOCAL ((unsigned long int)0xc0a80a54) //192.168.10.84 #define INADDR_SEND ((unsigned long int)0xc0a80a55) //192.168.10.85 static struct netpoll* np = NULL; static struct netpoll np_t; </code></pre> Initialization <pre><code>np_t.name = "LRNG"; strlcpy(np_t.dev_name, "eth0", IFNAMSIZ); np_t.local_ip = htonl(INADDR_LOCAL); np_t.remote_ip = htonl(INADDR_SEND); np_t.local_port = 6665; np_t.remote_port = 6666; memset(np_t.remote_mac, 0xff, ETH_ALEN); netpoll_print_options(&np_t); netpoll_setup(&np_t); np = &np_t; </code></pre> Use <pre><code>char message[MESSAGE_SIZE]; sprintf(message,"%d\n",42); int len = strlen(message); netpoll_send_udp(np,message,len); </code></pre> Hope it can help someone.
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singulars
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1. This table or related slice is empty.
PostParentId
1. POSending UDP packets from the Linux Kernel
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PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. UStvuillemin
UserOwnerUserId
1. UStvuillemin
plurals
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PostsAcceptedAnswerId
1. POSending UDP packets from the Linux Kernel
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1. VO
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2. VO
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3. VO
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1. This table or related slice is empty.

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