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Add macro NG_COPYMESSAGE(), which allocates memory and creates a

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copy of given control message.
This commit is contained in:
Gleb Smirnoff 2005-04-20 12:18:22 +00:00
parent 984be3efbf
commit 644168eedb
1 changed files with 22 additions and 1 deletions
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23
sys/netgraph/ng_message.h
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@ -405,7 +405,28 @@ struct flow_manager {
sizeof((rsp)->header.cmdstr)); \
(rsp)->header.flags |= NGF_RESP; \
} while (0)
/*
* Make a copy of message. Sets "copy" to NULL if fails.
*/
#define NG_COPYMESSAGE(copy, msg, how) \
do { \
MALLOC((copy), struct ng_mesg *, sizeof(struct ng_mesg) + \
(msg)->header.arglen, M_NETGRAPH_MSG, (how) | M_ZERO); \
if ((copy) == NULL) \
break; \
(copy)->header.version = NG_VERSION; \
(copy)->header.arglen = (msg)->header.arglen; \
(copy)->header.token = (msg)->header.token; \
(copy)->header.typecookie = (msg)->header.typecookie; \
(copy)->header.cmd = (msg)->header.cmd; \
(copy)->header.flags = (msg)->header.flags; \
bcopy((msg)->header.cmdstr, (copy)->header.cmdstr, \
sizeof((copy)->header.cmdstr)); \
if ((msg)->header.arglen > 0) \
bcopy((msg)->data, (copy)->data, (msg)->header.arglen); \
} while (0)
#endif /* _KERNEL */
#endif /* _NETGRAPH_NG_MESSAGE_H_ */