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37 * Author: Julian Elisher <julian@freebsd.org>
40 * $Whistle: ng_echo.c,v 1.13 1999/11/01 09:24:51 julian Exp $
44 * Netgraph "echo" node
46 * This node simply bounces data and messages back to whence they came.
49 #include <sys/param.h>
50 #include <sys/systm.h>
51 #include <sys/kernel.h>
52 #include <sys/malloc.h>
54 #include <netgraph/ng_message.h>
55 #include <netgraph/netgraph.h>
56 #include <netgraph/ng_echo.h>
58 /* Netgraph methods */
59 static ng_constructor_t nge_cons;
60 static ng_rcvmsg_t nge_rcvmsg;
61 static ng_rcvdata_t nge_rcvdata;
62 static ng_disconnect_t nge_disconnect;
65 static struct ng_type typestruct = {
79 NETGRAPH_INIT(echo, &typestruct);
88 * Receive control message. We just bounce it back as a reply.
91 nge_rcvmsg(node_p node, item_p item, hook_p lasthook)
96 NGI_GET_MSG(item, msg);
97 msg->header.flags |= NGF_RESP;
98 NG_RESPOND_MSG(error, node, item, msg);
106 nge_rcvdata(hook_p hook, item_p item)
110 NG_FWD_ITEM_HOOK(error, item, hook);
115 * Removal of the last link destroys the nodeo
118 nge_disconnect(hook_p hook)
120 if ((NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0)
121 && (NG_NODE_IS_VALID(NG_HOOK_NODE(hook)))) {
122 ng_rmnode_self(NG_HOOK_NODE(hook));