2 * Copyright 1996 Massachusetts Institute of Technology
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32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/socket.h>
36 #include <sys/sysctl.h>
39 #include <net/if_mib.h>
42 * A sysctl(3) MIB for generic interface information. This information
43 * is exported in the net.link.generic branch, which has the following
46 * net.link.generic .system - system-wide control variables
47 * and statistics (node)
48 * .ifdata.<ifindex>.general
49 * - what's in `struct ifdata'
50 * plus some other info
51 * .ifdata.<ifindex>.linkspecific
52 * - a link-type-specific data
53 * structure (as might be used
56 * Perhaps someday we will make addresses accessible via this interface
57 * as well (then there will be four such...). The reason that the
58 * index comes before the last element in the name is because it
59 * seems more orthogonal that way, particularly with the possibility
60 * of other per-interface data living down here as well (e.g., integrated
64 SYSCTL_DECL(_net_link_generic);
65 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RW, 0,
66 "Variables global to all interfaces");
67 SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, CTLFLAG_RD,
68 &if_index, 0, "Number of configured interfaces");
71 sysctl_ifdata(SYSCTL_HANDLER_ARGS) /* XXX bad syntax! */
73 int *name = (int *)arg1;
77 struct ifmibdata ifmd;
82 if (name[0] <= 0 || name[0] > if_index ||
83 ifaddr_byindex(name[0]) == NULL)
86 ifp = ifaddr_byindex(name[0])->ifa_ifp;
93 strlcpy(ifmd.ifmd_name, ifp->if_xname, sizeof(ifmd.ifmd_name));
95 #define COPY(fld) ifmd.ifmd_##fld = ifp->if_##fld
100 ifmd.ifmd_snd_len = ifp->if_snd.ifq_len;
101 ifmd.ifmd_snd_maxlen = ifp->if_snd.ifq_maxlen;
102 ifmd.ifmd_snd_drops = ifp->if_snd.ifq_drops;
104 error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
105 if (error || !req->newptr)
108 error = SYSCTL_IN(req, &ifmd, sizeof ifmd);
112 #define DONTCOPY(fld) ifmd.ifmd_data.ifi_##fld = ifp->if_data.ifi_##fld
121 #define COPY(fld) ifp->if_##fld = ifmd.ifmd_##fld
123 ifp->if_snd.ifq_maxlen = ifmd.ifmd_snd_maxlen;
124 ifp->if_snd.ifq_drops = ifmd.ifmd_snd_drops;
128 case IFDATA_LINKSPECIFIC:
129 error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
130 if (error || !req->newptr)
133 error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen);
141 SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RW,
142 sysctl_ifdata, "Interface table");