1c398230bSWarner Losh /*- 2bbd17bf8SGarrett Wollman * Copyright 1996 Massachusetts Institute of Technology 3bbd17bf8SGarrett Wollman * 4bbd17bf8SGarrett Wollman * Permission to use, copy, modify, and distribute this software and 5bbd17bf8SGarrett Wollman * its documentation for any purpose and without fee is hereby 6bbd17bf8SGarrett Wollman * granted, provided that both the above copyright notice and this 7bbd17bf8SGarrett Wollman * permission notice appear in all copies, that both the above 8bbd17bf8SGarrett Wollman * copyright notice and this permission notice appear in all 9bbd17bf8SGarrett Wollman * supporting documentation, and that the name of M.I.T. not be used 10bbd17bf8SGarrett Wollman * in advertising or publicity pertaining to distribution of the 11bbd17bf8SGarrett Wollman * software without specific, written prior permission. M.I.T. makes 12bbd17bf8SGarrett Wollman * no representations about the suitability of this software for any 13bbd17bf8SGarrett Wollman * purpose. It is provided "as is" without express or implied 14bbd17bf8SGarrett Wollman * warranty. 15bbd17bf8SGarrett Wollman * 16bbd17bf8SGarrett Wollman * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17bbd17bf8SGarrett Wollman * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18bbd17bf8SGarrett Wollman * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19bbd17bf8SGarrett Wollman * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20bbd17bf8SGarrett Wollman * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21bbd17bf8SGarrett Wollman * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22bbd17bf8SGarrett Wollman * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23bbd17bf8SGarrett Wollman * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24bbd17bf8SGarrett Wollman * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25bbd17bf8SGarrett Wollman * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26bbd17bf8SGarrett Wollman * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27bbd17bf8SGarrett Wollman * SUCH DAMAGE. 28bbd17bf8SGarrett Wollman * 29c3aac50fSPeter Wemm * $FreeBSD$ 30bbd17bf8SGarrett Wollman */ 31bbd17bf8SGarrett Wollman 32bbd17bf8SGarrett Wollman #include <sys/param.h> 33bbd17bf8SGarrett Wollman #include <sys/systm.h> 34bbd17bf8SGarrett Wollman #include <sys/kernel.h> 358ec07310SGleb Smirnoff #include <sys/malloc.h> 364458ac71SBruce Evans #include <sys/socket.h> 37bbd17bf8SGarrett Wollman #include <sys/sysctl.h> 38bbd17bf8SGarrett Wollman 39bbd17bf8SGarrett Wollman #include <net/if.h> 4076039bc8SGleb Smirnoff #include <net/if_var.h> 41bbd17bf8SGarrett Wollman #include <net/if_mib.h> 424b79449eSBjoern A. Zeeb #include <net/vnet.h> 43bbd17bf8SGarrett Wollman 44bbd17bf8SGarrett Wollman /* 45bbd17bf8SGarrett Wollman * A sysctl(3) MIB for generic interface information. This information 46bbd17bf8SGarrett Wollman * is exported in the net.link.generic branch, which has the following 47bbd17bf8SGarrett Wollman * structure: 48bbd17bf8SGarrett Wollman * 49bbd17bf8SGarrett Wollman * net.link.generic .system - system-wide control variables 50bbd17bf8SGarrett Wollman * and statistics (node) 51bbd17bf8SGarrett Wollman * .ifdata.<ifindex>.general 52bbd17bf8SGarrett Wollman * - what's in `struct ifdata' 53bbd17bf8SGarrett Wollman * plus some other info 54bbd17bf8SGarrett Wollman * .ifdata.<ifindex>.linkspecific 55bbd17bf8SGarrett Wollman * - a link-type-specific data 56bbd17bf8SGarrett Wollman * structure (as might be used 57bbd17bf8SGarrett Wollman * by an SNMP agent 58bbd17bf8SGarrett Wollman * 59bbd17bf8SGarrett Wollman * Perhaps someday we will make addresses accessible via this interface 60bbd17bf8SGarrett Wollman * as well (then there will be four such...). The reason that the 61bbd17bf8SGarrett Wollman * index comes before the last element in the name is because it 62bbd17bf8SGarrett Wollman * seems more orthogonal that way, particularly with the possibility 63bbd17bf8SGarrett Wollman * of other per-interface data living down here as well (e.g., integrated 64bbd17bf8SGarrett Wollman * services stuff). 65bbd17bf8SGarrett Wollman */ 66bbd17bf8SGarrett Wollman 67ce02431fSDoug Rabson SYSCTL_DECL(_net_link_generic); 686472ac3dSEd Schouten static SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, CTLFLAG_RW, 0, 69bbd17bf8SGarrett Wollman "Variables global to all interfaces"); 708b615593SMarko Zec 716df8a710SGleb Smirnoff SYSCTL_INT(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, 726df8a710SGleb Smirnoff CTLFLAG_VNET | CTLFLAG_RD, &VNET_NAME(if_index), 0, 738b615593SMarko Zec "Number of configured interfaces"); 74bbd17bf8SGarrett Wollman 75bbd17bf8SGarrett Wollman static int 7682d9ae4eSPoul-Henning Kamp sysctl_ifdata(SYSCTL_HANDLER_ARGS) /* XXX bad syntax! */ 77bbd17bf8SGarrett Wollman { 78bbd17bf8SGarrett Wollman int *name = (int *)arg1; 799bf40edeSBrooks Davis int error; 80bbd17bf8SGarrett Wollman u_int namelen = arg2; 81bbd17bf8SGarrett Wollman struct ifnet *ifp; 82bbd17bf8SGarrett Wollman struct ifmibdata ifmd; 83*caeeeaa7SGleb Smirnoff struct epoch_tracker et; 8415450897SHartmut Brandt size_t dlen; 8515450897SHartmut Brandt char *dbuf; 86bbd17bf8SGarrett Wollman 87bbd17bf8SGarrett Wollman if (namelen != 2) 88bbd17bf8SGarrett Wollman return EINVAL; 8927d37320SRobert Watson if (name[0] <= 0) 9027d37320SRobert Watson return (ENOENT); 91*caeeeaa7SGleb Smirnoff NET_EPOCH_ENTER(et); 9227d37320SRobert Watson ifp = ifnet_byindex_ref(name[0]); 93*caeeeaa7SGleb Smirnoff NET_EPOCH_EXIT(et); 9427d37320SRobert Watson if (ifp == NULL) 9527d37320SRobert Watson return (ENOENT); 96bbd17bf8SGarrett Wollman 97bbd17bf8SGarrett Wollman switch(name[1]) { 98bbd17bf8SGarrett Wollman default: 9927d37320SRobert Watson error = ENOENT; 10027d37320SRobert Watson goto out; 101bbd17bf8SGarrett Wollman 102bbd17bf8SGarrett Wollman case IFDATA_GENERAL: 103fd94099eSColin Percival bzero(&ifmd, sizeof(ifmd)); 1049bf40edeSBrooks Davis strlcpy(ifmd.ifmd_name, ifp->if_xname, sizeof(ifmd.ifmd_name)); 105bbd17bf8SGarrett Wollman 106e6485f73SGleb Smirnoff ifmd.ifmd_pcount = ifp->if_pcount; 107e6485f73SGleb Smirnoff if_data_copy(ifp, &ifmd.ifmd_data); 108e6485f73SGleb Smirnoff 10957c1493bSChristian S.J. Peron ifmd.ifmd_flags = ifp->if_flags | ifp->if_drv_flags; 110bbd17bf8SGarrett Wollman ifmd.ifmd_snd_len = ifp->if_snd.ifq_len; 111bbd17bf8SGarrett Wollman ifmd.ifmd_snd_maxlen = ifp->if_snd.ifq_maxlen; 11256b61ca2SGleb Smirnoff ifmd.ifmd_snd_drops = 11356b61ca2SGleb Smirnoff ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 114bbd17bf8SGarrett Wollman 115bbd17bf8SGarrett Wollman error = SYSCTL_OUT(req, &ifmd, sizeof ifmd); 116bbd17bf8SGarrett Wollman if (error) 11727d37320SRobert Watson goto out; 118bbd17bf8SGarrett Wollman break; 119bbd17bf8SGarrett Wollman 120bbd17bf8SGarrett Wollman case IFDATA_LINKSPECIFIC: 121bbd17bf8SGarrett Wollman error = SYSCTL_OUT(req, ifp->if_linkmib, ifp->if_linkmiblen); 122bbd17bf8SGarrett Wollman if (error || !req->newptr) 12327d37320SRobert Watson goto out; 124bbd17bf8SGarrett Wollman 125bbd17bf8SGarrett Wollman error = SYSCTL_IN(req, ifp->if_linkmib, ifp->if_linkmiblen); 126bbd17bf8SGarrett Wollman if (error) 12727d37320SRobert Watson goto out; 1289d53bbefSBruce M Simpson break; 129bbd17bf8SGarrett Wollman 13015450897SHartmut Brandt case IFDATA_DRIVERNAME: 13115450897SHartmut Brandt /* 20 is enough for 64bit ints */ 13215450897SHartmut Brandt dlen = strlen(ifp->if_dname) + 20 + 1; 13327d37320SRobert Watson if ((dbuf = malloc(dlen, M_TEMP, M_NOWAIT)) == NULL) { 13427d37320SRobert Watson error = ENOMEM; 13527d37320SRobert Watson goto out; 13627d37320SRobert Watson } 13715450897SHartmut Brandt if (ifp->if_dunit == IF_DUNIT_NONE) 13815450897SHartmut Brandt strcpy(dbuf, ifp->if_dname); 13915450897SHartmut Brandt else 14015450897SHartmut Brandt sprintf(dbuf, "%s%d", ifp->if_dname, ifp->if_dunit); 14115450897SHartmut Brandt 14215450897SHartmut Brandt error = SYSCTL_OUT(req, dbuf, strlen(dbuf) + 1); 14315450897SHartmut Brandt if (error == 0 && req->newptr != NULL) 14415450897SHartmut Brandt error = EPERM; 14515450897SHartmut Brandt free(dbuf, M_TEMP); 14627d37320SRobert Watson goto out; 147bbd17bf8SGarrett Wollman } 14827d37320SRobert Watson out: 14927d37320SRobert Watson if_rele(ifp); 15027d37320SRobert Watson return error; 151bbd17bf8SGarrett Wollman } 152bbd17bf8SGarrett Wollman 1536472ac3dSEd Schouten static SYSCTL_NODE(_net_link_generic, IFMIB_IFDATA, ifdata, CTLFLAG_RW, 154bbd17bf8SGarrett Wollman sysctl_ifdata, "Interface table"); 155bbd17bf8SGarrett Wollman 156