]>
git.proxmox.com Git - mirror_frr.git/blob - zebra/rtread_getmsg.c
2 * Kernel routing table readup by getmsg(2)
3 * Copyright (C) 1999 Michael Handler
5 * This file is part of GNU Zebra.
7 * GNU Zebra is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2, or (at your option) any
12 * GNU Zebra is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; see the file COPYING; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
30 #include "zebra/rib.h"
31 #include "zebra/zserv.h"
33 /* Thank you, Solaris, for polluting application symbol namespace. */
35 #undef hook_unregister
37 #include <sys/stream.h>
38 #include <sys/tihdr.h>
40 /* Solaris defines these in both <netinet/in.h> and <inet/in.h>, sigh */
42 #include <sys/tiuser.h>
44 #define T_CURRENT MI_T_CURRENT
45 #endif /* T_CURRENT */
47 #define IRE_CACHE 0x0020 /* Cached Route entry */
48 #endif /* IRE_CACHE */
49 #ifndef IRE_HOST_REDIRECT
50 #define IRE_HOST_REDIRECT 0x0200 /* Host route entry from redirects */
51 #endif /* IRE_HOST_REDIRECT */
52 #ifndef IRE_CACHETABLE
53 #define IRE_CACHETABLE (IRE_CACHE | IRE_BROADCAST | IRE_LOCAL | \
55 #endif /* IRE_CACHETABLE */
63 #include <inet/common.h>
65 #include <inet/mib2.h>
67 /* device to read IP routing table from */
68 #ifndef _PATH_GETMSG_ROUTE
69 #define _PATH_GETMSG_ROUTE "/dev/ip"
70 #endif /* _PATH_GETMSG_ROUTE */
72 #define RT_BUFSIZ 8192
75 handle_route_entry (mib2_ipRouteEntry_t
*routeEntry
)
78 struct in_addr tmpaddr
, gateway
;
79 union g_addr
*ggateway
;
80 u_char zebra_flags
= 0;
82 if (routeEntry
->ipRouteInfo
.re_ire_type
& IRE_CACHETABLE
)
85 if (routeEntry
->ipRouteInfo
.re_ire_type
& IRE_HOST_REDIRECT
)
86 zebra_flags
|= ZEBRA_FLAG_SELFROUTE
;
88 prefix
.family
= AF_INET
;
90 tmpaddr
.s_addr
= routeEntry
->ipRouteDest
;
91 prefix
.u
.prefix4
= tmpaddr
;
93 tmpaddr
.s_addr
= routeEntry
->ipRouteMask
;
94 prefix
.prefixlen
= ip_masklen (tmpaddr
);
96 gateway
.s_addr
= routeEntry
->ipRouteNextHop
;
97 ggateway
= (union g_addr
*)&gateway
;
99 rib_add (AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
, 0,
100 zebra_flags
, &prefix
, NULL
, ggateway
, NULL
, 0, 0, 0, 0, 0);
104 route_read (struct zebra_ns
*zns
)
106 char storage
[RT_BUFSIZ
];
108 struct T_optmgmt_req
*TLIreq
= (struct T_optmgmt_req
*) storage
;
109 struct T_optmgmt_ack
*TLIack
= (struct T_optmgmt_ack
*) storage
;
110 struct T_error_ack
*TLIerr
= (struct T_error_ack
*) storage
;
112 struct opthdr
*MIB2hdr
;
114 mib2_ipRouteEntry_t
*routeEntry
, *lastRouteEntry
;
116 struct strbuf msgdata
;
117 int flags
, dev
, retval
, process
;
119 if ((dev
= open (_PATH_GETMSG_ROUTE
, O_RDWR
)) == -1) {
120 zlog_warn ("can't open %s: %s", _PATH_GETMSG_ROUTE
,
121 safe_strerror (errno
));
125 TLIreq
->PRIM_type
= T_OPTMGMT_REQ
;
126 TLIreq
->OPT_offset
= sizeof (struct T_optmgmt_req
);
127 TLIreq
->OPT_length
= sizeof (struct opthdr
);
128 TLIreq
->MGMT_flags
= T_CURRENT
;
130 MIB2hdr
= (struct opthdr
*) &TLIreq
[1];
132 MIB2hdr
->level
= MIB2_IP
;
136 msgdata
.buf
= storage
;
137 msgdata
.len
= sizeof (struct T_optmgmt_req
) + sizeof (struct opthdr
);
141 if (putmsg (dev
, &msgdata
, NULL
, flags
) == -1) {
142 zlog_warn ("putmsg failed: %s", safe_strerror (errno
));
146 MIB2hdr
= (struct opthdr
*) &TLIack
[1];
147 msgdata
.maxlen
= sizeof (storage
);
151 retval
= getmsg (dev
, &msgdata
, NULL
, &flags
);
154 zlog_warn ("getmsg(ctl) failed: %s", safe_strerror (errno
));
158 /* This is normal loop termination */
160 (size_t)msgdata
.len
>= sizeof (struct T_optmgmt_ack
) &&
161 TLIack
->PRIM_type
== T_OPTMGMT_ACK
&&
162 TLIack
->MGMT_flags
== T_SUCCESS
&&
166 if ((size_t)msgdata
.len
>= sizeof (struct T_error_ack
) &&
167 TLIerr
->PRIM_type
== T_ERROR_ACK
) {
168 zlog_warn ("getmsg(ctl) returned T_ERROR_ACK: %s",
169 safe_strerror ((TLIerr
->TLI_error
== TSYSERR
)
170 ? TLIerr
->UNIX_error
: EPROTO
));
174 /* should dump more debugging info to the log statement,
175 like what GateD does in this instance, but not
177 if (retval
!= MOREDATA
||
178 (size_t)msgdata
.len
< sizeof (struct T_optmgmt_ack
) ||
179 TLIack
->PRIM_type
!= T_OPTMGMT_ACK
||
180 TLIack
->MGMT_flags
!= T_SUCCESS
) {
182 zlog_warn ("getmsg(ctl) returned bizarreness");
186 /* MIB2_IP_21 is the the pseudo-MIB2 ipRouteTable
187 entry, see <inet/mib2.h>. "This isn't the MIB data
188 you're looking for." */
189 process
= (MIB2hdr
->level
== MIB2_IP
&&
190 MIB2hdr
->name
== MIB2_IP_21
) ? 1 : 0;
192 /* getmsg writes the data buffer out completely, not
193 to the closest smaller multiple. Unless reassembling
194 data structures across buffer boundaries is your idea
195 of a good time, set maxlen to the closest smaller
196 multiple of the size of the datastructure you're
198 msgdata
.maxlen
= sizeof (storage
) - (sizeof (storage
)
199 % sizeof (mib2_ipRouteEntry_t
));
205 retval
= getmsg (dev
, NULL
, &msgdata
, &flags
);
208 zlog_warn ("getmsg(data) failed: %s",
209 safe_strerror (errno
));
213 if (!(retval
== 0 || retval
== MOREDATA
)) {
214 zlog_warn ("getmsg(data) returned %d", retval
);
220 sizeof (mib2_ipRouteEntry_t
) != 0) {
221 zlog_warn ("getmsg(data) returned "
222 "msgdata.len = %d (%% sizeof (mib2_ipRouteEntry_t) != 0)", msgdata
.len
);
226 routeEntry
= (mib2_ipRouteEntry_t
*)
228 lastRouteEntry
= (mib2_ipRouteEntry_t
*)
229 (msgdata
.buf
+ msgdata
.len
);
231 handle_route_entry (routeEntry
);
232 } while (++routeEntry
< lastRouteEntry
);
234 } while (retval
== MOREDATA
);
241 /* Only implemented for netlink method */
243 macfdb_read (struct zebra_ns
*zns
)
247 void macfdb_read_for_bridge (struct zebra_ns
*zns
, struct interface
*ifp
,
248 struct interface
*br_if
)
253 neigh_read (struct zebra_ns
*zns
)
257 void neigh_read_for_vlan (struct zebra_ns
*zns
, struct interface
*vlan_if
)