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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
32 #include "zebra/rib.h"
35 /* Thank you, Solaris, for polluting application symbol namespace. */
37 #undef hook_unregister
39 #include <sys/stream.h>
40 #include <sys/tihdr.h>
42 /* Solaris defines these in both <netinet/in.h> and <inet/in.h>, sigh */
44 #include <sys/tiuser.h>
46 #define T_CURRENT MI_T_CURRENT
47 #endif /* T_CURRENT */
49 #define IRE_CACHE 0x0020 /* Cached Route entry */
50 #endif /* IRE_CACHE */
51 #ifndef IRE_HOST_REDIRECT
52 #define IRE_HOST_REDIRECT 0x0200 /* Host route entry from redirects */
53 #endif /* IRE_HOST_REDIRECT */
54 #ifndef IRE_CACHETABLE
55 #define IRE_CACHETABLE (IRE_CACHE | IRE_BROADCAST | IRE_LOCAL | IRE_LOOPBACK)
56 #endif /* IRE_CACHETABLE */
64 #include <inet/common.h>
66 #include <inet/mib2.h>
68 /* device to read IP routing table from */
69 #ifndef _PATH_GETMSG_ROUTE
70 #define _PATH_GETMSG_ROUTE "/dev/ip"
71 #endif /* _PATH_GETMSG_ROUTE */
73 #define RT_BUFSIZ 8192
75 static void handle_route_entry(mib2_ipRouteEntry_t
*routeEntry
)
78 struct in_addr tmpaddr
;
80 uint8_t 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 memset(&nh
, 0, sizeof(nh
));
97 nh
.vrf_id
= VRF_DEFAULT
;
98 nh
.type
= NEXTHOP_TYPE_IPV4
;
99 nh
.gate
.ipv4
.s_addr
= routeEntry
->ipRouteNextHop
;
101 rib_add(AFI_IP
, SAFI_UNICAST
, VRF_DEFAULT
, ZEBRA_ROUTE_KERNEL
, 0,
102 zebra_flags
, &prefix
, NULL
, &nh
, 0, 0, 0, 0, 0);
105 void route_read(struct zebra_ns
*zns
)
107 char storage
[RT_BUFSIZ
];
109 struct T_optmgmt_req
*TLIreq
= (struct T_optmgmt_req
*)storage
;
110 struct T_optmgmt_ack
*TLIack
= (struct T_optmgmt_ack
*)storage
;
111 struct T_error_ack
*TLIerr
= (struct T_error_ack
*)storage
;
113 struct opthdr
*MIB2hdr
;
115 mib2_ipRouteEntry_t
*routeEntry
, *lastRouteEntry
;
117 struct strbuf msgdata
;
118 int flags
, dev
, retval
, process
;
120 if ((dev
= open(_PATH_GETMSG_ROUTE
, O_RDWR
)) == -1) {
121 flog_err_sys(LIB_ERR_SYSTEM_CALL
, "can't open %s: %s",
122 _PATH_GETMSG_ROUTE
, safe_strerror(errno
));
126 TLIreq
->PRIM_type
= T_OPTMGMT_REQ
;
127 TLIreq
->OPT_offset
= sizeof(struct T_optmgmt_req
);
128 TLIreq
->OPT_length
= sizeof(struct opthdr
);
129 TLIreq
->MGMT_flags
= T_CURRENT
;
131 MIB2hdr
= (struct opthdr
*)&TLIreq
[1];
133 MIB2hdr
->level
= MIB2_IP
;
137 msgdata
.buf
= storage
;
138 msgdata
.len
= sizeof(struct T_optmgmt_req
) + sizeof(struct opthdr
);
142 if (putmsg(dev
, &msgdata
, NULL
, flags
) == -1) {
143 flog_err_sys(LIB_ERR_SOCKET
, "putmsg failed: %s",
144 safe_strerror(errno
));
148 MIB2hdr
= (struct opthdr
*)&TLIack
[1];
149 msgdata
.maxlen
= sizeof(storage
);
153 retval
= getmsg(dev
, &msgdata
, NULL
, &flags
);
156 flog_err_sys(LIB_ERR_SYSTEM_CALL
,
157 "getmsg(ctl) failed: %s",
158 safe_strerror(errno
));
162 /* This is normal loop termination */
164 && (size_t)msgdata
.len
>= sizeof(struct T_optmgmt_ack
)
165 && TLIack
->PRIM_type
== T_OPTMGMT_ACK
166 && TLIack
->MGMT_flags
== T_SUCCESS
&& MIB2hdr
->len
== 0)
169 if ((size_t)msgdata
.len
>= sizeof(struct T_error_ack
)
170 && TLIerr
->PRIM_type
== T_ERROR_ACK
) {
171 zlog_debug("getmsg(ctl) returned T_ERROR_ACK: %s",
172 safe_strerror((TLIerr
->TLI_error
== TSYSERR
)
178 /* should dump more debugging info to the log statement,
179 like what GateD does in this instance, but not
181 if (retval
!= MOREDATA
182 || (size_t)msgdata
.len
< sizeof(struct T_optmgmt_ack
)
183 || TLIack
->PRIM_type
!= T_OPTMGMT_ACK
184 || TLIack
->MGMT_flags
!= T_SUCCESS
) {
186 zlog_debug("getmsg(ctl) returned bizarreness");
190 /* MIB2_IP_21 is the the pseudo-MIB2 ipRouteTable
191 entry, see <inet/mib2.h>. "This isn't the MIB data
192 you're looking for." */
193 process
= (MIB2hdr
->level
== MIB2_IP
194 && MIB2hdr
->name
== MIB2_IP_21
)
198 /* getmsg writes the data buffer out completely, not
199 to the closest smaller multiple. Unless reassembling
200 data structures across buffer boundaries is your idea
201 of a good time, set maxlen to the closest smaller
202 multiple of the size of the datastructure you're
206 - (sizeof(storage
) % sizeof(mib2_ipRouteEntry_t
));
212 retval
= getmsg(dev
, NULL
, &msgdata
, &flags
);
215 flog_err_sys(LIB_ERR_SYSTEM_CALL
,
216 "getmsg(data) failed: %s",
217 safe_strerror(errno
));
221 if (!(retval
== 0 || retval
== MOREDATA
)) {
222 zlog_debug("getmsg(data) returned %d", retval
);
227 if (msgdata
.len
% sizeof(mib2_ipRouteEntry_t
)
230 "getmsg(data) returned "
231 "msgdata.len = %d (%% sizeof (mib2_ipRouteEntry_t) != 0)",
236 routeEntry
= (mib2_ipRouteEntry_t
*)msgdata
.buf
;
238 (mib2_ipRouteEntry_t
*)(msgdata
.buf
241 handle_route_entry(routeEntry
);
242 } while (++routeEntry
< lastRouteEntry
);
244 } while (retval
== MOREDATA
);
251 /* Only implemented for netlink method */
252 void macfdb_read(struct zebra_ns
*zns
)
256 void macfdb_read_for_bridge(struct zebra_ns
*zns
, struct interface
*ifp
,
257 struct interface
*br_if
)
261 void neigh_read(struct zebra_ns
*zns
)
265 void neigh_read_for_vlan(struct zebra_ns
*zns
, struct interface
*vlan_if
)
269 void kernel_read_pbr_rules(struct zebra_ns
*zns
)