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718e3744 | 1 | /* |
2 | * Kernel routing table readup by getmsg(2) | |
3 | * Copyright (C) 1999 Michael Handler | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
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 | |
10 | * later version. | |
11 | * | |
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. | |
16 | * | |
896014f4 DL |
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 | |
718e3744 | 20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "prefix.h" | |
25 | #include "log.h" | |
26 | #include "if.h" | |
78104b9b | 27 | #include "vrf.h" |
82283592 | 28 | #include "vty.h" |
718e3744 | 29 | |
30 | #include "zebra/rib.h" | |
6621ca86 | 31 | #include "zebra/zserv.h" |
718e3744 | 32 | |
a5b38c5b DL |
33 | /* Thank you, Solaris, for polluting application symbol namespace. */ |
34 | #undef hook_register | |
35 | #undef hook_unregister | |
36 | ||
718e3744 | 37 | #include <sys/stream.h> |
38 | #include <sys/tihdr.h> | |
39 | ||
40 | /* Solaris defines these in both <netinet/in.h> and <inet/in.h>, sigh */ | |
41 | #ifdef SUNOS_5 | |
42 | #include <sys/tiuser.h> | |
43 | #ifndef T_CURRENT | |
44 | #define T_CURRENT MI_T_CURRENT | |
45 | #endif /* T_CURRENT */ | |
46 | #ifndef IRE_CACHE | |
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 | |
d62a17ae | 53 | #define IRE_CACHETABLE (IRE_CACHE | IRE_BROADCAST | IRE_LOCAL | IRE_LOOPBACK) |
718e3744 | 54 | #endif /* IRE_CACHETABLE */ |
55 | #undef IPOPT_EOL | |
56 | #undef IPOPT_NOP | |
57 | #undef IPOPT_LSRR | |
58 | #undef IPOPT_RR | |
59 | #undef IPOPT_SSRR | |
60 | #endif /* SUNOS_5 */ | |
61 | ||
62 | #include <inet/common.h> | |
63 | #include <inet/ip.h> | |
64 | #include <inet/mib2.h> | |
65 | ||
66 | /* device to read IP routing table from */ | |
67 | #ifndef _PATH_GETMSG_ROUTE | |
68 | #define _PATH_GETMSG_ROUTE "/dev/ip" | |
69 | #endif /* _PATH_GETMSG_ROUTE */ | |
70 | ||
71 | #define RT_BUFSIZ 8192 | |
72 | ||
d62a17ae | 73 | static void handle_route_entry(mib2_ipRouteEntry_t *routeEntry) |
718e3744 | 74 | { |
d62a17ae | 75 | struct prefix prefix; |
76 | struct in_addr tmpaddr, gateway; | |
77 | union g_addr *ggateway; | |
78 | u_char zebra_flags = 0; | |
718e3744 | 79 | |
d62a17ae | 80 | if (routeEntry->ipRouteInfo.re_ire_type & IRE_CACHETABLE) |
81 | return; | |
718e3744 | 82 | |
d62a17ae | 83 | if (routeEntry->ipRouteInfo.re_ire_type & IRE_HOST_REDIRECT) |
84 | zebra_flags |= ZEBRA_FLAG_SELFROUTE; | |
718e3744 | 85 | |
d62a17ae | 86 | prefix.family = AF_INET; |
718e3744 | 87 | |
d62a17ae | 88 | tmpaddr.s_addr = routeEntry->ipRouteDest; |
89 | prefix.u.prefix4 = tmpaddr; | |
718e3744 | 90 | |
d62a17ae | 91 | tmpaddr.s_addr = routeEntry->ipRouteMask; |
92 | prefix.prefixlen = ip_masklen(tmpaddr); | |
718e3744 | 93 | |
d62a17ae | 94 | gateway.s_addr = routeEntry->ipRouteNextHop; |
95 | ggateway = (union g_addr *)&gateway; | |
718e3744 | 96 | |
d62a17ae | 97 | rib_add(AFI_IP, SAFI_UNICAST, VRF_DEFAULT, ZEBRA_ROUTE_KERNEL, 0, |
98 | zebra_flags, &prefix, NULL, ggateway, NULL, 0, 0, 0, 0, 0); | |
718e3744 | 99 | } |
100 | ||
d62a17ae | 101 | void route_read(struct zebra_ns *zns) |
718e3744 | 102 | { |
d62a17ae | 103 | char storage[RT_BUFSIZ]; |
718e3744 | 104 | |
d62a17ae | 105 | struct T_optmgmt_req *TLIreq = (struct T_optmgmt_req *)storage; |
106 | struct T_optmgmt_ack *TLIack = (struct T_optmgmt_ack *)storage; | |
107 | struct T_error_ack *TLIerr = (struct T_error_ack *)storage; | |
718e3744 | 108 | |
d62a17ae | 109 | struct opthdr *MIB2hdr; |
718e3744 | 110 | |
d62a17ae | 111 | mib2_ipRouteEntry_t *routeEntry, *lastRouteEntry; |
718e3744 | 112 | |
d62a17ae | 113 | struct strbuf msgdata; |
114 | int flags, dev, retval, process; | |
718e3744 | 115 | |
d62a17ae | 116 | if ((dev = open(_PATH_GETMSG_ROUTE, O_RDWR)) == -1) { |
117 | zlog_warn("can't open %s: %s", _PATH_GETMSG_ROUTE, | |
118 | safe_strerror(errno)); | |
718e3744 | 119 | return; |
120 | } | |
121 | ||
122 | TLIreq->PRIM_type = T_OPTMGMT_REQ; | |
d62a17ae | 123 | TLIreq->OPT_offset = sizeof(struct T_optmgmt_req); |
124 | TLIreq->OPT_length = sizeof(struct opthdr); | |
718e3744 | 125 | TLIreq->MGMT_flags = T_CURRENT; |
126 | ||
d62a17ae | 127 | MIB2hdr = (struct opthdr *)&TLIreq[1]; |
718e3744 | 128 | |
129 | MIB2hdr->level = MIB2_IP; | |
130 | MIB2hdr->name = 0; | |
131 | MIB2hdr->len = 0; | |
d62a17ae | 132 | |
718e3744 | 133 | msgdata.buf = storage; |
d62a17ae | 134 | msgdata.len = sizeof(struct T_optmgmt_req) + sizeof(struct opthdr); |
718e3744 | 135 | |
136 | flags = 0; | |
137 | ||
d62a17ae | 138 | if (putmsg(dev, &msgdata, NULL, flags) == -1) { |
139 | zlog_warn("putmsg failed: %s", safe_strerror(errno)); | |
718e3744 | 140 | goto exit; |
141 | } | |
142 | ||
d62a17ae | 143 | MIB2hdr = (struct opthdr *)&TLIack[1]; |
144 | msgdata.maxlen = sizeof(storage); | |
718e3744 | 145 | |
146 | while (1) { | |
147 | flags = 0; | |
d62a17ae | 148 | retval = getmsg(dev, &msgdata, NULL, &flags); |
718e3744 | 149 | |
150 | if (retval == -1) { | |
d62a17ae | 151 | zlog_warn("getmsg(ctl) failed: %s", |
152 | safe_strerror(errno)); | |
718e3744 | 153 | goto exit; |
154 | } | |
155 | ||
156 | /* This is normal loop termination */ | |
d62a17ae | 157 | if (retval == 0 |
158 | && (size_t)msgdata.len >= sizeof(struct T_optmgmt_ack) | |
159 | && TLIack->PRIM_type == T_OPTMGMT_ACK | |
160 | && TLIack->MGMT_flags == T_SUCCESS && MIB2hdr->len == 0) | |
718e3744 | 161 | break; |
162 | ||
d62a17ae | 163 | if ((size_t)msgdata.len >= sizeof(struct T_error_ack) |
164 | && TLIerr->PRIM_type == T_ERROR_ACK) { | |
165 | zlog_warn("getmsg(ctl) returned T_ERROR_ACK: %s", | |
166 | safe_strerror((TLIerr->TLI_error == TSYSERR) | |
167 | ? TLIerr->UNIX_error | |
168 | : EPROTO)); | |
718e3744 | 169 | break; |
170 | } | |
171 | ||
172 | /* should dump more debugging info to the log statement, | |
173 | like what GateD does in this instance, but not | |
174 | critical yet. */ | |
d62a17ae | 175 | if (retval != MOREDATA |
176 | || (size_t)msgdata.len < sizeof(struct T_optmgmt_ack) | |
177 | || TLIack->PRIM_type != T_OPTMGMT_ACK | |
178 | || TLIack->MGMT_flags != T_SUCCESS) { | |
718e3744 | 179 | errno = ENOMSG; |
d62a17ae | 180 | zlog_warn("getmsg(ctl) returned bizarreness"); |
718e3744 | 181 | break; |
182 | } | |
183 | ||
184 | /* MIB2_IP_21 is the the pseudo-MIB2 ipRouteTable | |
185 | entry, see <inet/mib2.h>. "This isn't the MIB data | |
186 | you're looking for." */ | |
d62a17ae | 187 | process = (MIB2hdr->level == MIB2_IP |
188 | && MIB2hdr->name == MIB2_IP_21) | |
189 | ? 1 | |
190 | : 0; | |
718e3744 | 191 | |
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 | |
197 | retrieving. */ | |
d62a17ae | 198 | msgdata.maxlen = |
199 | sizeof(storage) | |
200 | - (sizeof(storage) % sizeof(mib2_ipRouteEntry_t)); | |
718e3744 | 201 | |
202 | msgdata.len = 0; | |
203 | flags = 0; | |
204 | ||
205 | do { | |
d62a17ae | 206 | retval = getmsg(dev, NULL, &msgdata, &flags); |
718e3744 | 207 | |
208 | if (retval == -1) { | |
d62a17ae | 209 | zlog_warn("getmsg(data) failed: %s", |
210 | safe_strerror(errno)); | |
718e3744 | 211 | goto exit; |
212 | } | |
213 | ||
214 | if (!(retval == 0 || retval == MOREDATA)) { | |
d62a17ae | 215 | zlog_warn("getmsg(data) returned %d", retval); |
718e3744 | 216 | goto exit; |
217 | } | |
218 | ||
219 | if (process) { | |
d62a17ae | 220 | if (msgdata.len % sizeof(mib2_ipRouteEntry_t) |
221 | != 0) { | |
222 | zlog_warn( | |
223 | "getmsg(data) returned " | |
224 | "msgdata.len = %d (%% sizeof (mib2_ipRouteEntry_t) != 0)", | |
225 | msgdata.len); | |
718e3744 | 226 | goto exit; |
227 | } | |
228 | ||
d62a17ae | 229 | routeEntry = (mib2_ipRouteEntry_t *)msgdata.buf; |
230 | lastRouteEntry = | |
231 | (mib2_ipRouteEntry_t *)(msgdata.buf | |
232 | + msgdata.len); | |
718e3744 | 233 | do { |
d62a17ae | 234 | handle_route_entry(routeEntry); |
718e3744 | 235 | } while (++routeEntry < lastRouteEntry); |
236 | } | |
237 | } while (retval == MOREDATA); | |
238 | } | |
239 | ||
240 | exit: | |
d62a17ae | 241 | close(dev); |
718e3744 | 242 | } |
2232a77c | 243 | |
244 | /* Only implemented for netlink method */ | |
d62a17ae | 245 | void macfdb_read(struct zebra_ns *zns) |
2232a77c | 246 | { |
247 | } | |
248 | ||
d62a17ae | 249 | void macfdb_read_for_bridge(struct zebra_ns *zns, struct interface *ifp, |
250 | struct interface *br_if) | |
2232a77c | 251 | { |
252 | } | |
253 | ||
d62a17ae | 254 | void neigh_read(struct zebra_ns *zns) |
2232a77c | 255 | { |
256 | } | |
257 | ||
d62a17ae | 258 | void neigh_read_for_vlan(struct zebra_ns *zns, struct interface *vlan_if) |
2232a77c | 259 | { |
260 | } |