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Viewing changes to doc/src/examples/nlmsg_put.c

  • Committer: Bazaar Package Importer
  • Author(s): Heiko Stuebner
  • Date: 2011-05-21 19:25:13 UTC
  • Revision ID: james.westby@ubuntu.com-20110521192513-1ieyu9w9kym4bt16
Tags: upstream-3.0
Import upstream version 3.0

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doc/src/examples/nlmsg_put.c
 
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#include <netlink/msg.h>
 
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struct nlmsghdr *hdr;
 
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struct nl_msg *msg;
 
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struct myhdr {
 
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        uint32_t foo1, foo2;
 
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} hdr = { 10, 20 };
 
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/* Allocate a message with the default maximum message size */
 
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msg = nlmsg_alloc();
 
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/*
 
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 * Add header with message type MY_MSGTYPE, the flag NLM_F_CREATE,
 
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 * let library fill port and sequence number, and reserve room for
 
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 * struct myhdr
 
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 */
 
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hdr = nlmsg_put(msg, NL_AUTO_PORT, NL_AUTO_SEQ, MY_MSGTYPE, sizeof(hdr), NLM_F_CREATE);
 
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/* Copy own header into newly reserved payload section */
 
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memcpy(nlmsg_data(hdr), &hdr, sizeof(hdr));
 
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/*
 
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 * The message will now look like this:
 
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 *     +-------------------+- - -+----------------+- - -+
 
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 *     |  struct nlmsghdr  | Pad |  struct myhdr  | Pad |
 
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 *     +-------------------+-----+----------------+- - -+
 
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 * nlh -^                        /                \
 
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 *                              +--------+---------+
 
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 *                              |  foo1  |  foo2   |
 
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 *                              +--------+---------+
 
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 */