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_var.h>
40 #include <net/if_mib.h>
44 * A sysctl(3) MIB for generic interface information. This information
45 * is exported in the net.link.generic branch, which has the following
48 * net.link.generic .system - system-wide control variables
49 * and statistics (node)
50 * .ifdata.<ifindex>.general
51 * - what's in `struct ifdata'
52 * plus some other info
53 * .ifdata.<ifindex>.linkspecific
54 * - a link-type-specific data
55 * structure (as might be used
58 * Perhaps someday we will make addresses accessible via this interface
59 * as well (then there will be four such...). The reason that the
60 * index comes before the last element in the name is because it
61 * seems more orthogonal that way, particularly with the possibility
62 * of other per-interface data living down here as well (e.g., integrated
66 SYSCTL_DECL(_net_link_generic);
67 static SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RW, 0,
68 "Variables global to all interfaces");
70 SYSCTL_VNET_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, CTLFLAG_RD,
71 &VNET_NAME(if_index), 0,
72 "Number of configured interfaces");
75 sysctl_ifdata(SYSCTL_HANDLER_ARGS) /* XXX bad syntax! */
77 int *name = (int *)arg1;
81 struct ifmibdata ifmd;
89 ifp = ifnet_byindex_ref(name[0]);
99 bzero(&ifmd, sizeof(ifmd));
100 strlcpy(ifmd.ifmd_name, ifp->if_xname, sizeof(ifmd.ifmd_name));
102 #define COPY(fld) ifmd.ifmd_##fld = ifp->if_##fld
106 ifmd.ifmd_flags = ifp->if_flags | ifp->if_drv_flags;
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;
111 error = SYSCTL_OUT(req, &ifmd, sizeof ifmd);
112 if (error || !req->newptr)
115 error = SYSCTL_IN(req, &ifmd, sizeof ifmd);
119 #define DONTCOPY(fld) ifmd.ifmd_data.ifi_##fld = ifp->if_data.ifi_##fld
128 #define COPY(fld) ifp->if_##fld = ifmd.ifmd_##fld
130 ifp->if_snd.ifq_maxlen = ifmd.ifmd_snd_maxlen;
131 ifp->if_snd.ifq_drops = ifmd.ifmd_snd_drops;
135 case IFDATA_LINKSPECIFIC:
136 error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen);
137 if (error || !req->newptr)
140 error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen);
145 case IFDATA_DRIVERNAME:
146 /* 20 is enough for 64bit ints */
147 dlen = strlen(ifp->if_dname) + 20 + 1;
148 if ((dbuf = malloc(dlen, M_TEMP, M_NOWAIT)) == NULL) {
152 if (ifp->if_dunit == IF_DUNIT_NONE)
153 strcpy(dbuf, ifp->if_dname);
155 sprintf(dbuf, "%s%d", ifp->if_dname, ifp->if_dunit);
157 error = SYSCTL_OUT(req, dbuf, strlen(dbuf) + 1);
158 if (error == 0 && req->newptr != NULL)
168 static SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RW,
169 sysctl_ifdata, "Interface table");