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
);
107 return zebra_route(0, family
, pref
, plen
, gate
, ifindex
, metric
);
109 if(newmetric
== metric
&& memcmp(newgate
, gate
, 16) == 0 &&
110 newifindex
== ifindex
)
112 debugf(BABEL_DEBUG_ROUTE
, "Modify route: delete old; add new.");
113 rc
= zebra_route(0, family
, pref
, plen
, gate
, ifindex
, metric
);
117 rc
= zebra_route(1, family
, pref
, plen
, newgate
, newifindex
,
126 zebra_route(int add
, int family
, const unsigned char *pref
, unsigned short plen
,
127 const unsigned char *gate
, int ifindex
, unsigned int metric
)
129 struct zapi_route api
; /* quagga's communication system */
130 struct prefix quagga_prefix
; /* quagga's prefix */
131 union g_addr babel_prefix_addr
; /* babeld's prefix addr */
132 struct zapi_nexthop
*api_nh
; /* next router to go - no ECMP */
134 api_nh
= &api
.nexthops
[0];
136 /* convert to be understandable by quagga */
137 /* convert given addresses */
140 uchar_to_inaddr(&babel_prefix_addr
.ipv4
, pref
);
143 uchar_to_in6addr(&babel_prefix_addr
.ipv6
, pref
);
147 /* make prefix structure */
148 memset (&quagga_prefix
, 0, sizeof(quagga_prefix
));
149 quagga_prefix
.family
= family
;
152 IPV4_ADDR_COPY (&quagga_prefix
.u
.prefix4
, &babel_prefix_addr
.ipv4
);
153 /* our plen is for v4mapped's addr */
154 quagga_prefix
.prefixlen
= plen
- 96;
157 IPV6_ADDR_COPY (&quagga_prefix
.u
.prefix6
, &babel_prefix_addr
.ipv6
);
158 quagga_prefix
.prefixlen
= plen
;
161 apply_mask(&quagga_prefix
);
163 memset(&api
, 0, sizeof(api
));
164 api
.type
= ZEBRA_ROUTE_BABEL
;
165 api
.safi
= SAFI_UNICAST
;
166 api
.vrf_id
= VRF_DEFAULT
;
167 api
.prefix
= quagga_prefix
;
169 if(metric
>= KERNEL_INFINITY
) {
170 zapi_route_set_blackhole(&api
, BLACKHOLE_REJECT
);
172 SET_FLAG(api
.message
, ZAPI_MESSAGE_NEXTHOP
);
174 api_nh
->ifindex
= ifindex
;
175 api_nh
->vrf_id
= VRF_DEFAULT
;
178 uchar_to_inaddr(&api_nh
->gate
.ipv4
, gate
);
179 if (IPV4_ADDR_SAME (&api_nh
->gate
.ipv4
, &quagga_prefix
.u
.prefix4
) &&
180 quagga_prefix
.prefixlen
== 32) {
181 api_nh
->type
= NEXTHOP_TYPE_IFINDEX
;
183 api_nh
->type
= NEXTHOP_TYPE_IPV4_IFINDEX
;
187 uchar_to_in6addr(&api_nh
->gate
.ipv6
, gate
);
188 /* difference to IPv4: always leave the linklocal as nexthop */
189 api_nh
->type
= NEXTHOP_TYPE_IPV6_IFINDEX
;
192 SET_FLAG(api
.message
, ZAPI_MESSAGE_METRIC
);
196 debugf(BABEL_DEBUG_ROUTE
, "%s route (%s) to zebra",
197 add
? "adding" : "removing",
198 (family
== AF_INET
) ? "ipv4" : "ipv6");
199 return zclient_route_send (add
? ZEBRA_ROUTE_ADD
: ZEBRA_ROUTE_DELETE
,
204 if_eui64(int ifindex
, unsigned char *eui
)
206 struct interface
*ifp
= if_lookup_by_index(ifindex
, VRF_DEFAULT
);
211 uint8_t len
= (uint8_t)ifp
->hw_addr_len
;
212 char *tmp
= (void*) ifp
->hw_addr
;
217 } else if (len
== 6) {
221 memcpy(eui
+5, tmp
+3, 3);
228 /* Like gettimeofday, but returns monotonic time. If POSIX clocks are not
229 available, falls back to gettimeofday but enforces monotonicity. */
231 gettime(struct timeval
*tv
)
236 /* If /dev/urandom doesn't exist, this will fail with ENOENT, which the
237 caller will deal with gracefully. */
240 read_random_bytes(void *buf
, size_t len
)
245 fd
= open("/dev/urandom", O_RDONLY
);
249 rc
= read(fd
, buf
, len
);
250 if(rc
< 0 || (unsigned) rc
< len
)