2 * Copyright 1996 Massachusetts Institute of Technology
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5 * its documentation for any purpose and without fee is hereby
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16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
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32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/socket.h>
37 #include <sys/sysctl.h>
40 #include <net/if_var.h>
41 #include <net/if_private.h>
42 #include <net/if_mib.h>
46 * A sysctl(3) MIB for generic interface information. This information
47 * is exported in the net.link.generic branch, which has the following
50 * net.link.generic .system - system-wide control variables
51 * and statistics (node)
52 * .ifdata.<ifindex>.general
53 * - what's in `struct ifdata'
54 * plus some other info
55 * .ifdata.<ifindex>.linkspecific
56 * - a link-type-specific data
57 * structure (as might be used
60 * Perhaps someday we will make addresses accessible via this interface
61 * as well (then there will be four such...). The reason that the
62 * index comes before the last element in the name is because it
63 * seems more orthogonal that way, particularly with the possibility
64 * of other per-interface data living down here as well (e.g., integrated
69 sysctl_ifdata(SYSCTL_HANDLER_ARGS) /* XXX bad syntax! */
71 int *name = (int *)arg1;
75 struct ifmibdata ifmd;
76 struct epoch_tracker et;
85 ifp = ifnet_byindex_ref(name[0]);
96 bzero(&ifmd, sizeof(ifmd));
97 strlcpy(ifmd.ifmd_name, ifp->if_xname, sizeof(ifmd.ifmd_name));
99 ifmd.ifmd_pcount = ifp->if_pcount;
100 if_data_copy(ifp, &ifmd.ifmd_data);
102 ifmd.ifmd_flags = ifp->if_flags | ifp->if_drv_flags;
103 ifmd.ifmd_snd_len = ifp->if_snd.ifq_len;
104 ifmd.ifmd_snd_maxlen = ifp->if_snd.ifq_maxlen;
105 ifmd.ifmd_snd_drops =
106 ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
108 error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
113 case IFDATA_LINKSPECIFIC:
114 error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
115 if (error || !req->newptr)
119 case IFDATA_DRIVERNAME:
120 /* 20 is enough for 64bit ints */
121 dlen = strlen(ifp->if_dname) + 20 + 1;
122 if ((dbuf = malloc(dlen, M_TEMP, M_NOWAIT)) == NULL) {
126 if (ifp->if_dunit == IF_DUNIT_NONE)
127 strcpy(dbuf, ifp->if_dname);
129 sprintf(dbuf, "%s%d", ifp->if_dname, ifp->if_dunit);
131 error = SYSCTL_OUT(req, dbuf, strlen(dbuf) + 1);
132 if (error == 0 && req->newptr != NULL)
142 SYSCTL_DECL(_net_link_generic);
143 static SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata,
144 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_ifdata,