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author | ru <ru@FreeBSD.org> | 2004-04-17 12:42:17 +0000 |
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committer | ru <ru@FreeBSD.org> | 2004-04-17 12:42:17 +0000 |
commit | e64f447183713ad1cccc4e067e9e13c54a9ff8a6 (patch) | |
tree | 97e34c1ab52c6efac9df6c8f18499c371d4ff2e7 /sys/netgraph/ng_hub.c | |
parent | 0ecadbbd1dd7aaf248742e4e91b83c2594f8b0ff (diff) | |
download | FreeBSD-src-e64f447183713ad1cccc4e067e9e13c54a9ff8a6.zip FreeBSD-src-e64f447183713ad1cccc4e067e9e13c54a9ff8a6.tar.gz |
A simple packet distribution node type that acts like an Ethernet hub.
Diffstat (limited to 'sys/netgraph/ng_hub.c')
-rw-r--r-- | sys/netgraph/ng_hub.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/sys/netgraph/ng_hub.c b/sys/netgraph/ng_hub.c new file mode 100644 index 0000000..bf61f6a --- /dev/null +++ b/sys/netgraph/ng_hub.c @@ -0,0 +1,110 @@ +/*- + * Copyright (c) 2004 Ruslan Ermilov + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/errno.h> +#include <sys/kernel.h> +#include <sys/mbuf.h> +#include <sys/systm.h> + +#include <netgraph/ng_message.h> +#include <netgraph/ng_hub.h> +#include <netgraph/netgraph.h> + +static ng_constructor_t ng_hub_constructor; +static ng_rcvdata_t ng_hub_rcvdata; +static ng_disconnect_t ng_hub_disconnect; + +static struct ng_type ng_hub_typestruct = { + .version = NG_ABI_VERSION, + .name = NG_HUB_NODE_TYPE, + .constructor = ng_hub_constructor, + .rcvdata = ng_hub_rcvdata, + .disconnect = ng_hub_disconnect, +}; +NETGRAPH_INIT(hub, &ng_hub_typestruct); + + +static int +ng_hub_constructor(node_p node) +{ + + return (0); +} + +static int +ng_hub_rcvdata(hook_p hook, item_p item) +{ + const node_p node = NG_HOOK_NODE(hook); + int error = 0; + hook_p hook2; + struct mbuf * const m = NGI_M(item), *m2; + meta_p const meta = NGI_META(item); + meta_p meta2; + int nhooks; + + if ((nhooks = NG_NODE_NUMHOOKS(node)) == 1) { + NG_FREE_ITEM(item); + return (0); + } + LIST_FOREACH(hook2, &node->nd_hooks, hk_hooks) { + if (hook2 == hook) + continue; + if (--nhooks == 1) + NG_FWD_ITEM_HOOK(error, item, hook2); + else { + if ((m2 = m_dup(m, M_DONTWAIT)) == NULL) { + NG_FREE_ITEM(item); + return (ENOBUFS); + } + if (meta != NULL) { + if ((meta2 = ng_copy_meta(meta)) == NULL) { + m_freem(m2); + NG_FREE_ITEM(item); + return (ENOMEM); + } + } else + meta2 = NULL; + NG_SEND_DATA(error, hook2, m2, meta2); + if (error) + break; + } + } + + return (error); +} + +static int +ng_hub_disconnect(hook_p hook) +{ + + if (NG_NODE_NUMHOOKS(NG_HOOK_NODE(hook)) == 0 && + NG_NODE_IS_VALID(NG_HOOK_NODE(hook))) + ng_rmnode_self(NG_HOOK_NODE(hook)); + return (0); +} |