2 Copyright 2007, 2008 by Grégoire Henry, Julien Cristau and Juliusz Chroboczek
3 Copyright 2011, 2012 by Matthieu Boutier and Juliusz Chroboczek
5 Permission is hereby granted, free of charge, to any person obtaining a copy
6 of this software and associated documentation files (the "Software"), to deal
7 in the Software without restriction, including without limitation the rights
8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 copies of the Software, and to permit persons to whom the Software is
10 furnished to do so, subject to the following conditions:
12 The above copyright notice and this permission notice shall be included in
13 all copies or substantial portions of the Software.
15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
29 #include <sys/param.h>
35 #include <sys/types.h>
36 #include <sys/socket.h>
37 #include <netinet/in.h>
39 #include <arpa/inet.h>
53 #include "babel_interface.h"
54 #include "babel_zebra.h"
58 zebra_route(int add
, int familt
, const unsigned char *pref
, unsigned short plen
,
59 const unsigned char *gate
, int ifindex
, unsigned int metric
);
62 kernel_interface_operational(struct interface
*interface
)
64 return if_is_operative(interface
);
68 kernel_interface_mtu(struct interface
*interface
)
70 return MIN(interface
->mtu
, interface
->mtu6
);
74 kernel_interface_wireless(struct interface
*interface
)
80 kernel_route(enum babel_kernel_routes operation
, const unsigned char *pref
,
81 unsigned short plen
, const unsigned char *gate
, int ifindex
,
82 unsigned int metric
, const unsigned char *newgate
, int newifindex
,
83 unsigned int newmetric
)
88 /* Check that the protocol family is consistent. */
89 if(plen
>= 96 && v4mapped(pref
)) {
105 return zebra_route(1, family
, pref
, plen
, gate
, ifindex
, metric
);
108 return zebra_route(0, family
, pref
, plen
, gate
, ifindex
, metric
);
111 if(newmetric
== metric
&& memcmp(newgate
, gate
, 16) == 0 &&
112 newifindex
== ifindex
)
114 debugf(BABEL_DEBUG_ROUTE
, "Modify route: delete old; add new.");
115 rc
= zebra_route(0, family
, pref
, plen
, gate
, ifindex
, metric
);
119 rc
= zebra_route(1, family
, pref
, plen
, newgate
, newifindex
,
129 zebra_route(int add
, int family
, const unsigned char *pref
, unsigned short plen
,
130 const unsigned char *gate
, int ifindex
, unsigned int metric
)
132 struct zapi_route api
; /* quagga's communication system */
133 struct prefix quagga_prefix
; /* quagga's prefix */
134 union g_addr babel_prefix_addr
; /* babeld's prefix addr */
135 struct zapi_nexthop
*api_nh
; /* next router to go - no ECMP */
137 api_nh
= &api
.nexthops
[0];
139 /* convert to be understandable by quagga */
140 /* convert given addresses */
143 uchar_to_inaddr(&babel_prefix_addr
.ipv4
, pref
);
146 uchar_to_in6addr(&babel_prefix_addr
.ipv6
, pref
);
150 /* make prefix structure */
151 memset (&quagga_prefix
, 0, sizeof(quagga_prefix
));
152 quagga_prefix
.family
= family
;
155 IPV4_ADDR_COPY (&quagga_prefix
.u
.prefix4
, &babel_prefix_addr
.ipv4
);
156 /* our plen is for v4mapped's addr */
157 quagga_prefix
.prefixlen
= plen
- 96;
160 IPV6_ADDR_COPY (&quagga_prefix
.u
.prefix6
, &babel_prefix_addr
.ipv6
);
161 quagga_prefix
.prefixlen
= plen
;
164 apply_mask(&quagga_prefix
);
166 memset(&api
, 0, sizeof(api
));
167 api
.type
= ZEBRA_ROUTE_BABEL
;
168 api
.safi
= SAFI_UNICAST
;
169 api
.vrf_id
= VRF_DEFAULT
;
170 api
.prefix
= quagga_prefix
;
172 if(metric
>= KERNEL_INFINITY
) {
173 zapi_route_set_blackhole(&api
, BLACKHOLE_REJECT
);
175 SET_FLAG(api
.message
, ZAPI_MESSAGE_NEXTHOP
);
177 api_nh
->ifindex
= ifindex
;
178 api_nh
->vrf_id
= VRF_DEFAULT
;
181 uchar_to_inaddr(&api_nh
->gate
.ipv4
, gate
);
182 if (IPV4_ADDR_SAME (&api_nh
->gate
.ipv4
, &quagga_prefix
.u
.prefix4
) &&
183 quagga_prefix
.prefixlen
== 32) {
184 api_nh
->type
= NEXTHOP_TYPE_IFINDEX
;
186 api_nh
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
190 uchar_to_in6addr(&api_nh
->gate
.ipv6
, gate
);
191 /* difference to IPv4: always leave the linklocal as nexthop */
192 api_nh
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
195 SET_FLAG(api
.message
, ZAPI_MESSAGE_METRIC
);
199 debugf(BABEL_DEBUG_ROUTE
, "%s route (%s) to zebra",
200 add
? "adding" : "removing",
201 (family
== AF_INET
) ? "ipv4" : "ipv6");
202 return zclient_route_send (add
? ZEBRA_ROUTE_ADD
: ZEBRA_ROUTE_DELETE
,
207 if_eui64(int ifindex
, unsigned char *eui
)
209 struct interface
*ifp
= if_lookup_by_index(ifindex
, VRF_DEFAULT
);
214 uint8_t len
= (uint8_t)ifp
->hw_addr_len
;
215 char *tmp
= (void*) ifp
->hw_addr
;
220 } else if (len
== 6) {
224 memcpy(eui
+5, tmp
+3, 3);
231 /* Like gettimeofday, but returns monotonic time. If POSIX clocks are not
232 available, falls back to gettimeofday but enforces monotonicity. */
234 gettime(struct timeval
*tv
)
239 /* If /dev/urandom doesn't exist, this will fail with ENOENT, which the
240 caller will deal with gracefully. */
243 read_random_bytes(void *buf
, size_t len
)
248 fd
= open("/dev/urandom", O_RDONLY
);
252 rc
= read(fd
, buf
, len
);
253 if(rc
< 0 || (unsigned) rc
< len
)