Add the DragonFly cvs id and perform general cleanups on cvs/rcs/sccs ids. Most
[dragonfly.git] / sys / net / if_mib.c
1 /*
2  * Copyright 1996 Massachusetts Institute of Technology
3  *
4  * Permission to use, copy, modify, and distribute this software and
5  * its documentation for any purpose and without fee is hereby
6  * granted, provided that both the above copyright notice and this
7  * permission notice appear in all copies, that both the above
8  * copyright notice and this permission notice appear in all
9  * supporting documentation, and that the name of M.I.T. not be used
10  * in advertising or publicity pertaining to distribution of the
11  * software without specific, written prior permission.  M.I.T. makes
12  * no representations about the suitability of this software for any
13  * purpose.  It is provided "as is" without express or implied
14  * warranty.
15  * 
16  * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
17  * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20  * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD: src/sys/net/if_mib.c,v 1.8.2.1 2000/08/03 00:09:34 ps Exp $
30  * $DragonFly: src/sys/net/if_mib.c,v 1.2 2003/06/17 04:28:48 dillon Exp $
31  */
32
33 #include <sys/param.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/socket.h>
37 #include <sys/sysctl.h>
38
39 #include <net/if.h>
40 #include <net/if_mib.h>
41
42 /*
43  * A sysctl(3) MIB for generic interface information.  This information
44  * is exported in the net.link.generic branch, which has the following
45  * structure:
46  *
47  * net.link.generic     .system                 - system-wide control variables
48  *                                                and statistics (node)
49  *                      .ifdata.<ifindex>.general
50  *                                              - what's in `struct ifdata'
51  *                                                plus some other info
52  *                      .ifdata.<ifindex>.linkspecific
53  *                                              - a link-type-specific data
54  *                                                structure (as might be used
55  *                                                by an SNMP agent
56  *
57  * Perhaps someday we will make addresses accessible via this interface
58  * as well (then there will be four such...).  The reason that the
59  * index comes before the last element in the name is because it
60  * seems more orthogonal that way, particularly with the possibility
61  * of other per-interface data living down here as well (e.g., integrated
62  * services stuff).
63  */
64
65 SYSCTL_DECL(_net_link_generic);
66 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RW, 0,
67             "Variables global to all interfaces");
68 SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, CTLFLAG_RD,
69            &if_index, 0, "Number of configured interfaces");
70
71 static int
72 sysctl_ifdata(SYSCTL_HANDLER_ARGS) /* XXX bad syntax! */
73 {
74         int *name = (int *)arg1;
75         int error, ifnlen;
76         u_int namelen = arg2;
77         struct ifnet *ifp;
78         char workbuf[64];
79         struct ifmibdata ifmd;
80
81         if (namelen != 2)
82                 return EINVAL;
83
84         if (name[0] <= 0 || name[0] > if_index)
85                 return ENOENT;
86
87         ifp = ifnet_addrs[name[0] - 1]->ifa_ifp;
88
89         switch(name[1]) {
90         default:
91                 return ENOENT;
92
93         case IFDATA_GENERAL:
94                 ifnlen = snprintf(workbuf, sizeof(workbuf),
95                     "%s%d", ifp->if_name, ifp->if_unit);
96                 if(ifnlen + 1 > sizeof ifmd.ifmd_name) {
97                         return ENAMETOOLONG;
98                 } else {
99                         strcpy(ifmd.ifmd_name, workbuf);
100                 }
101
102 #define COPY(fld) ifmd.ifmd_##fld = ifp->if_##fld
103                 COPY(pcount);
104                 COPY(flags);
105                 COPY(data);
106 #undef COPY
107                 ifmd.ifmd_snd_len = ifp->if_snd.ifq_len;
108                 ifmd.ifmd_snd_maxlen = ifp->if_snd.ifq_maxlen;
109                 ifmd.ifmd_snd_drops = ifp->if_snd.ifq_drops;
110
111                 error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
112                 if (error || !req->newptr)
113                         return error;
114
115                 error = SYSCTL_IN(req, &ifmd, sizeof ifmd);
116                 if (error)
117                         return error;
118
119 #define DONTCOPY(fld) ifmd.ifmd_data.ifi_##fld = ifp->if_data.ifi_##fld
120                 DONTCOPY(type);
121                 DONTCOPY(physical);
122                 DONTCOPY(addrlen);
123                 DONTCOPY(hdrlen);
124                 DONTCOPY(mtu);
125                 DONTCOPY(metric);
126                 DONTCOPY(baudrate);
127 #undef DONTCOPY
128 #define COPY(fld) ifp->if_##fld = ifmd.ifmd_##fld
129                 COPY(data);
130                 ifp->if_snd.ifq_maxlen = ifmd.ifmd_snd_maxlen;
131                 ifp->if_snd.ifq_drops = ifmd.ifmd_snd_drops;
132 #undef COPY
133                 break;
134
135         case IFDATA_LINKSPECIFIC:
136                 error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
137                 if (error || !req->newptr)
138                         return error;
139
140                 error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen);
141                 if (error)
142                         return error;
143                 
144         }
145         return 0;
146 }
147
148 SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RW,
149             sysctl_ifdata, "Interface table");
150