| @@ -1,2105 +1,2107 @@ | | | @@ -1,2105 +1,2107 @@ |
1 | /* $NetBSD: if_arp.c,v 1.282.2.4 2019/09/30 15:55:40 martin Exp $ */ | | 1 | /* $NetBSD: if_arp.c,v 1.282.2.5 2019/10/11 18:22:14 martin Exp $ */ |
2 | | | 2 | |
3 | /* | | 3 | /* |
4 | * Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc. | | 4 | * Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc. |
5 | * All rights reserved. | | 5 | * All rights reserved. |
6 | * | | 6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation | | 7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Public Access Networks Corporation ("Panix"). It was developed under | | 8 | * by Public Access Networks Corporation ("Panix"). It was developed under |
9 | * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. | | 9 | * contract to Panix by Eric Haszlakiewicz and Thor Lancelot Simon. |
10 | * | | 10 | * |
11 | * Redistribution and use in source and binary forms, with or without | | 11 | * Redistribution and use in source and binary forms, with or without |
12 | * modification, are permitted provided that the following conditions | | 12 | * modification, are permitted provided that the following conditions |
13 | * are met: | | 13 | * are met: |
14 | * 1. Redistributions of source code must retain the above copyright | | 14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. | | 15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright | | 16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the | | 17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. | | 18 | * documentation and/or other materials provided with the distribution. |
19 | * | | 19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS | | 20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | | 21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | | 22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS | | 23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | 24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | 25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | 26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | 27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | 28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | | 29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 | * POSSIBILITY OF SUCH DAMAGE. | | 30 | * POSSIBILITY OF SUCH DAMAGE. |
31 | */ | | 31 | */ |
32 | | | 32 | |
33 | /* | | 33 | /* |
34 | * Copyright (c) 1982, 1986, 1988, 1993 | | 34 | * Copyright (c) 1982, 1986, 1988, 1993 |
35 | * The Regents of the University of California. All rights reserved. | | 35 | * The Regents of the University of California. All rights reserved. |
36 | * | | 36 | * |
37 | * Redistribution and use in source and binary forms, with or without | | 37 | * Redistribution and use in source and binary forms, with or without |
38 | * modification, are permitted provided that the following conditions | | 38 | * modification, are permitted provided that the following conditions |
39 | * are met: | | 39 | * are met: |
40 | * 1. Redistributions of source code must retain the above copyright | | 40 | * 1. Redistributions of source code must retain the above copyright |
41 | * notice, this list of conditions and the following disclaimer. | | 41 | * notice, this list of conditions and the following disclaimer. |
42 | * 2. Redistributions in binary form must reproduce the above copyright | | 42 | * 2. Redistributions in binary form must reproduce the above copyright |
43 | * notice, this list of conditions and the following disclaimer in the | | 43 | * notice, this list of conditions and the following disclaimer in the |
44 | * documentation and/or other materials provided with the distribution. | | 44 | * documentation and/or other materials provided with the distribution. |
45 | * 3. Neither the name of the University nor the names of its contributors | | 45 | * 3. Neither the name of the University nor the names of its contributors |
46 | * may be used to endorse or promote products derived from this software | | 46 | * may be used to endorse or promote products derived from this software |
47 | * without specific prior written permission. | | 47 | * without specific prior written permission. |
48 | * | | 48 | * |
49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | | 49 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | | 50 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | | 51 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | | 52 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | | 53 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | | 54 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | | 55 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | | 56 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | | 57 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | | 58 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
59 | * SUCH DAMAGE. | | 59 | * SUCH DAMAGE. |
60 | * | | 60 | * |
61 | * @(#)if_ether.c 8.2 (Berkeley) 9/26/94 | | 61 | * @(#)if_ether.c 8.2 (Berkeley) 9/26/94 |
62 | */ | | 62 | */ |
63 | | | 63 | |
64 | /* | | 64 | /* |
65 | * Ethernet address resolution protocol. | | 65 | * Ethernet address resolution protocol. |
66 | * TODO: | | 66 | * TODO: |
67 | * add "inuse/lock" bit (or ref. count) along with valid bit | | 67 | * add "inuse/lock" bit (or ref. count) along with valid bit |
68 | */ | | 68 | */ |
69 | | | 69 | |
70 | #include <sys/cdefs.h> | | 70 | #include <sys/cdefs.h> |
71 | __KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.282.2.4 2019/09/30 15:55:40 martin Exp $"); | | 71 | __KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.282.2.5 2019/10/11 18:22:14 martin Exp $"); |
72 | | | 72 | |
73 | #ifdef _KERNEL_OPT | | 73 | #ifdef _KERNEL_OPT |
74 | #include "opt_ddb.h" | | 74 | #include "opt_ddb.h" |
75 | #include "opt_inet.h" | | 75 | #include "opt_inet.h" |
76 | #include "opt_net_mpsafe.h" | | 76 | #include "opt_net_mpsafe.h" |
77 | #endif | | 77 | #endif |
78 | | | 78 | |
79 | #ifdef INET | | 79 | #ifdef INET |
80 | | | 80 | |
81 | #include "arp.h" | | 81 | #include "arp.h" |
82 | #include "bridge.h" | | 82 | #include "bridge.h" |
83 | | | 83 | |
84 | #include <sys/param.h> | | 84 | #include <sys/param.h> |
85 | #include <sys/systm.h> | | 85 | #include <sys/systm.h> |
86 | #include <sys/callout.h> | | 86 | #include <sys/callout.h> |
87 | #include <sys/kmem.h> | | 87 | #include <sys/kmem.h> |
88 | #include <sys/mbuf.h> | | 88 | #include <sys/mbuf.h> |
89 | #include <sys/socket.h> | | 89 | #include <sys/socket.h> |
90 | #include <sys/time.h> | | 90 | #include <sys/time.h> |
91 | #include <sys/timetc.h> | | 91 | #include <sys/timetc.h> |
92 | #include <sys/kernel.h> | | 92 | #include <sys/kernel.h> |
93 | #include <sys/errno.h> | | 93 | #include <sys/errno.h> |
94 | #include <sys/ioctl.h> | | 94 | #include <sys/ioctl.h> |
95 | #include <sys/syslog.h> | | 95 | #include <sys/syslog.h> |
96 | #include <sys/proc.h> | | 96 | #include <sys/proc.h> |
97 | #include <sys/protosw.h> | | 97 | #include <sys/protosw.h> |
98 | #include <sys/domain.h> | | 98 | #include <sys/domain.h> |
99 | #include <sys/sysctl.h> | | 99 | #include <sys/sysctl.h> |
100 | #include <sys/socketvar.h> | | 100 | #include <sys/socketvar.h> |
101 | #include <sys/percpu.h> | | 101 | #include <sys/percpu.h> |
102 | #include <sys/cprng.h> | | 102 | #include <sys/cprng.h> |
103 | #include <sys/kmem.h> | | 103 | #include <sys/kmem.h> |
104 | | | 104 | |
105 | #include <net/ethertypes.h> | | 105 | #include <net/ethertypes.h> |
106 | #include <net/if.h> | | 106 | #include <net/if.h> |
107 | #include <net/if_dl.h> | | 107 | #include <net/if_dl.h> |
108 | #include <net/if_token.h> | | 108 | #include <net/if_token.h> |
109 | #include <net/if_types.h> | | 109 | #include <net/if_types.h> |
110 | #include <net/if_ether.h> | | 110 | #include <net/if_ether.h> |
111 | #include <net/if_llatbl.h> | | 111 | #include <net/if_llatbl.h> |
112 | #include <net/route.h> | | 112 | #include <net/route.h> |
113 | #include <net/net_stats.h> | | 113 | #include <net/net_stats.h> |
114 | | | 114 | |
115 | #include <netinet/in.h> | | 115 | #include <netinet/in.h> |
116 | #include <netinet/in_systm.h> | | 116 | #include <netinet/in_systm.h> |
117 | #include <netinet/in_var.h> | | 117 | #include <netinet/in_var.h> |
118 | #include <netinet/ip.h> | | 118 | #include <netinet/ip.h> |
119 | #include <netinet/if_inarp.h> | | 119 | #include <netinet/if_inarp.h> |
120 | | | 120 | |
121 | #include "arcnet.h" | | 121 | #include "arcnet.h" |
122 | #if NARCNET > 0 | | 122 | #if NARCNET > 0 |
123 | #include <net/if_arc.h> | | 123 | #include <net/if_arc.h> |
124 | #endif | | 124 | #endif |
125 | #include "fddi.h" | | 125 | #include "fddi.h" |
126 | #if NFDDI > 0 | | 126 | #if NFDDI > 0 |
127 | #include <net/if_fddi.h> | | 127 | #include <net/if_fddi.h> |
128 | #endif | | 128 | #endif |
129 | #include "token.h" | | 129 | #include "token.h" |
130 | #include "carp.h" | | 130 | #include "carp.h" |
131 | #if NCARP > 0 | | 131 | #if NCARP > 0 |
132 | #include <netinet/ip_carp.h> | | 132 | #include <netinet/ip_carp.h> |
133 | #endif | | 133 | #endif |
134 | | | 134 | |
135 | /* | | 135 | /* |
136 | * ARP trailer negotiation. Trailer protocol is not IP specific, | | 136 | * ARP trailer negotiation. Trailer protocol is not IP specific, |
137 | * but ARP request/response use IP addresses. | | 137 | * but ARP request/response use IP addresses. |
138 | */ | | 138 | */ |
139 | #define ETHERTYPE_IPTRAILERS ETHERTYPE_TRAIL | | 139 | #define ETHERTYPE_IPTRAILERS ETHERTYPE_TRAIL |
140 | | | 140 | |
141 | /* timer values */ | | 141 | /* timer values */ |
142 | static int arpt_keep = (20*60); /* once resolved, good for 20 more minutes */ | | 142 | static int arpt_keep = (20*60); /* once resolved, good for 20 more minutes */ |
143 | static int arpt_down = 20; /* once declared down, don't send for 20 secs */ | | 143 | static int arpt_down = 20; /* once declared down, don't send for 20 secs */ |
144 | static int arp_maxhold = 1; /* number of packets to hold per ARP entry */ | | 144 | static int arp_maxhold = 1; /* number of packets to hold per ARP entry */ |
145 | #define rt_expire rt_rmx.rmx_expire | | 145 | #define rt_expire rt_rmx.rmx_expire |
146 | #define rt_pksent rt_rmx.rmx_pksent | | 146 | #define rt_pksent rt_rmx.rmx_pksent |
147 | | | 147 | |
148 | int ip_dad_count = PROBE_NUM; | | 148 | int ip_dad_count = PROBE_NUM; |
149 | #ifdef ARP_DEBUG | | 149 | #ifdef ARP_DEBUG |
150 | int arp_debug = 1; | | 150 | int arp_debug = 1; |
151 | #else | | 151 | #else |
152 | int arp_debug = 0; | | 152 | int arp_debug = 0; |
153 | #endif | | 153 | #endif |
154 | | | 154 | |
155 | static void arp_init(void); | | 155 | static void arp_init(void); |
156 | static void arp_dad_init(void); | | 156 | static void arp_dad_init(void); |
157 | | | 157 | |
158 | static void arprequest(struct ifnet *, | | 158 | static void arprequest(struct ifnet *, |
159 | const struct in_addr *, const struct in_addr *, | | 159 | const struct in_addr *, const struct in_addr *, |
160 | const uint8_t *); | | 160 | const uint8_t *); |
161 | static void arpannounce1(struct ifaddr *); | | 161 | static void arpannounce1(struct ifaddr *); |
162 | static struct sockaddr *arp_setgate(struct rtentry *, struct sockaddr *, | | 162 | static struct sockaddr *arp_setgate(struct rtentry *, struct sockaddr *, |
163 | const struct sockaddr *); | | 163 | const struct sockaddr *); |
164 | static void arptimer(void *); | | 164 | static void arptimer(void *); |
165 | static void arp_settimer(struct llentry *, int); | | 165 | static void arp_settimer(struct llentry *, int); |
166 | static struct llentry *arplookup(struct ifnet *, | | 166 | static struct llentry *arplookup(struct ifnet *, |
167 | const struct in_addr *, const struct sockaddr *, int); | | 167 | const struct in_addr *, const struct sockaddr *, int); |
168 | static struct llentry *arpcreate(struct ifnet *, | | 168 | static struct llentry *arpcreate(struct ifnet *, |
169 | const struct in_addr *, const struct sockaddr *, int); | | 169 | const struct in_addr *, const struct sockaddr *, int); |
170 | static void in_arpinput(struct mbuf *); | | 170 | static void in_arpinput(struct mbuf *); |
171 | static void in_revarpinput(struct mbuf *); | | 171 | static void in_revarpinput(struct mbuf *); |
172 | static void revarprequest(struct ifnet *); | | 172 | static void revarprequest(struct ifnet *); |
173 | | | 173 | |
174 | static void arp_drainstub(void); | | 174 | static void arp_drainstub(void); |
175 | | | 175 | |
176 | struct dadq; | | 176 | struct dadq; |
177 | static void arp_dad_timer(struct dadq *); | | 177 | static void arp_dad_timer(struct dadq *); |
178 | static void arp_dad_start(struct ifaddr *); | | 178 | static void arp_dad_start(struct ifaddr *); |
179 | static void arp_dad_stop(struct ifaddr *); | | 179 | static void arp_dad_stop(struct ifaddr *); |
180 | static void arp_dad_duplicated(struct ifaddr *, const struct sockaddr_dl *); | | 180 | static void arp_dad_duplicated(struct ifaddr *, const struct sockaddr_dl *); |
181 | | | 181 | |
182 | static void arp_init_llentry(struct ifnet *, struct llentry *); | | 182 | static void arp_init_llentry(struct ifnet *, struct llentry *); |
183 | #if NTOKEN > 0 | | 183 | #if NTOKEN > 0 |
184 | static void arp_free_llentry_tokenring(struct llentry *); | | 184 | static void arp_free_llentry_tokenring(struct llentry *); |
185 | #endif | | 185 | #endif |
186 | | | 186 | |
187 | struct ifqueue arpintrq = { | | 187 | struct ifqueue arpintrq = { |
188 | .ifq_head = NULL, | | 188 | .ifq_head = NULL, |
189 | .ifq_tail = NULL, | | 189 | .ifq_tail = NULL, |
190 | .ifq_len = 0, | | 190 | .ifq_len = 0, |
191 | .ifq_maxlen = 50, | | 191 | .ifq_maxlen = 50, |
192 | .ifq_drops = 0, | | 192 | .ifq_drops = 0, |
193 | }; | | 193 | }; |
194 | static int arp_maxtries = 5; | | 194 | static int arp_maxtries = 5; |
195 | static int useloopback = 1; /* use loopback interface for local traffic */ | | 195 | static int useloopback = 1; /* use loopback interface for local traffic */ |
196 | | | 196 | |
197 | static percpu_t *arpstat_percpu; | | 197 | static percpu_t *arpstat_percpu; |
198 | | | 198 | |
199 | #define ARP_STAT_GETREF() _NET_STAT_GETREF(arpstat_percpu) | | 199 | #define ARP_STAT_GETREF() _NET_STAT_GETREF(arpstat_percpu) |
200 | #define ARP_STAT_PUTREF() _NET_STAT_PUTREF(arpstat_percpu) | | 200 | #define ARP_STAT_PUTREF() _NET_STAT_PUTREF(arpstat_percpu) |
201 | | | 201 | |
202 | #define ARP_STATINC(x) _NET_STATINC(arpstat_percpu, x) | | 202 | #define ARP_STATINC(x) _NET_STATINC(arpstat_percpu, x) |
203 | #define ARP_STATADD(x, v) _NET_STATADD(arpstat_percpu, x, v) | | 203 | #define ARP_STATADD(x, v) _NET_STATADD(arpstat_percpu, x, v) |
204 | | | 204 | |
205 | /* revarp state */ | | 205 | /* revarp state */ |
206 | static struct in_addr myip, srv_ip; | | 206 | static struct in_addr myip, srv_ip; |
207 | static int myip_initialized = 0; | | 207 | static int myip_initialized = 0; |
208 | static int revarp_in_progress = 0; | | 208 | static int revarp_in_progress = 0; |
209 | static struct ifnet *myip_ifp = NULL; | | 209 | static struct ifnet *myip_ifp = NULL; |
210 | | | 210 | |
211 | static int arp_drainwanted; | | 211 | static int arp_drainwanted; |
212 | | | 212 | |
213 | static int log_movements = 0; | | 213 | static int log_movements = 0; |
214 | static int log_permanent_modify = 1; | | 214 | static int log_permanent_modify = 1; |
215 | static int log_wrong_iface = 1; | | 215 | static int log_wrong_iface = 1; |
216 | | | 216 | |
217 | DOMAIN_DEFINE(arpdomain); /* forward declare and add to link set */ | | 217 | DOMAIN_DEFINE(arpdomain); /* forward declare and add to link set */ |
218 | | | 218 | |
219 | static void | | 219 | static void |
220 | arp_fasttimo(void) | | 220 | arp_fasttimo(void) |
221 | { | | 221 | { |
222 | if (arp_drainwanted) { | | 222 | if (arp_drainwanted) { |
223 | arp_drain(); | | 223 | arp_drain(); |
224 | arp_drainwanted = 0; | | 224 | arp_drainwanted = 0; |
225 | } | | 225 | } |
226 | } | | 226 | } |
227 | | | 227 | |
228 | static const struct protosw arpsw[] = { | | 228 | static const struct protosw arpsw[] = { |
229 | { | | 229 | { |
230 | .pr_type = 0, | | 230 | .pr_type = 0, |
231 | .pr_domain = &arpdomain, | | 231 | .pr_domain = &arpdomain, |
232 | .pr_protocol = 0, | | 232 | .pr_protocol = 0, |
233 | .pr_flags = 0, | | 233 | .pr_flags = 0, |
234 | .pr_input = 0, | | 234 | .pr_input = 0, |
235 | .pr_ctlinput = 0, | | 235 | .pr_ctlinput = 0, |
236 | .pr_ctloutput = 0, | | 236 | .pr_ctloutput = 0, |
237 | .pr_usrreqs = 0, | | 237 | .pr_usrreqs = 0, |
238 | .pr_init = arp_init, | | 238 | .pr_init = arp_init, |
239 | .pr_fasttimo = arp_fasttimo, | | 239 | .pr_fasttimo = arp_fasttimo, |
240 | .pr_slowtimo = 0, | | 240 | .pr_slowtimo = 0, |
241 | .pr_drain = arp_drainstub, | | 241 | .pr_drain = arp_drainstub, |
242 | } | | 242 | } |
243 | }; | | 243 | }; |
244 | | | 244 | |
245 | struct domain arpdomain = { | | 245 | struct domain arpdomain = { |
246 | .dom_family = PF_ARP, | | 246 | .dom_family = PF_ARP, |
247 | .dom_name = "arp", | | 247 | .dom_name = "arp", |
248 | .dom_protosw = arpsw, | | 248 | .dom_protosw = arpsw, |
249 | .dom_protoswNPROTOSW = &arpsw[__arraycount(arpsw)], | | 249 | .dom_protoswNPROTOSW = &arpsw[__arraycount(arpsw)], |
250 | #ifdef MBUFTRACE | | 250 | #ifdef MBUFTRACE |
251 | .dom_mowner = MOWNER_INIT("internet", "arp"), | | 251 | .dom_mowner = MOWNER_INIT("internet", "arp"), |
252 | #endif | | 252 | #endif |
253 | }; | | 253 | }; |
254 | | | 254 | |
255 | static void sysctl_net_inet_arp_setup(struct sysctllog **); | | 255 | static void sysctl_net_inet_arp_setup(struct sysctllog **); |
256 | | | 256 | |
257 | void | | 257 | void |
258 | arp_init(void) | | 258 | arp_init(void) |
259 | { | | 259 | { |
260 | | | 260 | |
261 | sysctl_net_inet_arp_setup(NULL); | | 261 | sysctl_net_inet_arp_setup(NULL); |
262 | arpstat_percpu = percpu_alloc(sizeof(uint64_t) * ARP_NSTATS); | | 262 | arpstat_percpu = percpu_alloc(sizeof(uint64_t) * ARP_NSTATS); |
263 | IFQ_LOCK_INIT(&arpintrq); | | 263 | IFQ_LOCK_INIT(&arpintrq); |
264 | | | 264 | |
265 | #ifdef MBUFTRACE | | 265 | #ifdef MBUFTRACE |
266 | MOWNER_ATTACH(&arpdomain.dom_mowner); | | 266 | MOWNER_ATTACH(&arpdomain.dom_mowner); |
267 | #endif | | 267 | #endif |
268 | | | 268 | |
269 | arp_dad_init(); | | 269 | arp_dad_init(); |
270 | } | | 270 | } |
271 | | | 271 | |
272 | static void | | 272 | static void |
273 | arp_drainstub(void) | | 273 | arp_drainstub(void) |
274 | { | | 274 | { |
275 | arp_drainwanted = 1; | | 275 | arp_drainwanted = 1; |
276 | } | | 276 | } |
277 | | | 277 | |
278 | /* | | 278 | /* |
279 | * ARP protocol drain routine. Called when memory is in short supply. | | 279 | * ARP protocol drain routine. Called when memory is in short supply. |
280 | * Called at splvm(); don't acquire softnet_lock as can be called from | | 280 | * Called at splvm(); don't acquire softnet_lock as can be called from |
281 | * hardware interrupt handlers. | | 281 | * hardware interrupt handlers. |
282 | */ | | 282 | */ |
283 | void | | 283 | void |
284 | arp_drain(void) | | 284 | arp_drain(void) |
285 | { | | 285 | { |
286 | | | 286 | |
287 | lltable_drain(AF_INET); | | 287 | lltable_drain(AF_INET); |
288 | } | | 288 | } |
289 | | | 289 | |
290 | static void | | 290 | static void |
291 | arptimer(void *arg) | | 291 | arptimer(void *arg) |
292 | { | | 292 | { |
293 | struct llentry *lle = arg; | | 293 | struct llentry *lle = arg; |
294 | struct ifnet *ifp; | | 294 | struct ifnet *ifp; |
295 | | | 295 | |
296 | KASSERT((lle->la_flags & LLE_STATIC) == 0); | | 296 | KASSERT((lle->la_flags & LLE_STATIC) == 0); |
297 | | | 297 | |
298 | LLE_WLOCK(lle); | | 298 | LLE_WLOCK(lle); |
299 | | | 299 | |
300 | /* | | 300 | /* |
301 | * This shortcut is required to avoid trying to touch ifp that may be | | 301 | * This shortcut is required to avoid trying to touch ifp that may be |
302 | * being destroyed. | | 302 | * being destroyed. |
303 | */ | | 303 | */ |
304 | if ((lle->la_flags & LLE_LINKED) == 0) { | | 304 | if ((lle->la_flags & LLE_LINKED) == 0) { |
305 | LLE_FREE_LOCKED(lle); | | 305 | LLE_FREE_LOCKED(lle); |
306 | return; | | 306 | return; |
307 | } | | 307 | } |
308 | | | 308 | |
309 | ifp = lle->lle_tbl->llt_ifp; | | 309 | ifp = lle->lle_tbl->llt_ifp; |
310 | | | 310 | |
311 | /* XXX: LOR avoidance. We still have ref on lle. */ | | 311 | /* XXX: LOR avoidance. We still have ref on lle. */ |
312 | LLE_WUNLOCK(lle); | | 312 | LLE_WUNLOCK(lle); |
313 | | | 313 | |
314 | IF_AFDATA_LOCK(ifp); | | 314 | IF_AFDATA_LOCK(ifp); |
315 | LLE_WLOCK(lle); | | 315 | LLE_WLOCK(lle); |
316 | | | 316 | |
317 | /* Guard against race with other llentry_free(). */ | | 317 | /* Guard against race with other llentry_free(). */ |
318 | if (lle->la_flags & LLE_LINKED) { | | 318 | if (lle->la_flags & LLE_LINKED) { |
319 | size_t pkts_dropped; | | 319 | size_t pkts_dropped; |
320 | | | 320 | |
321 | if (lle->la_flags & LLE_VALID) { | | 321 | if (lle->la_flags & LLE_VALID) { |
322 | struct in_addr *in; | | 322 | struct in_addr *in; |
323 | struct sockaddr_in sin; | | 323 | struct sockaddr_in sin; |
324 | const char *lladdr; | | 324 | const char *lladdr; |
325 | | | 325 | |
326 | in = &lle->r_l3addr.addr4; | | 326 | in = &lle->r_l3addr.addr4; |
327 | sockaddr_in_init(&sin, in, 0); | | 327 | sockaddr_in_init(&sin, in, 0); |
328 | lladdr = (const char *)&lle->ll_addr; | | 328 | lladdr = (const char *)&lle->ll_addr; |
329 | rt_clonedmsg(RTM_DELETE, sintosa(&sin), lladdr, ifp); | | 329 | rt_clonedmsg(RTM_DELETE, sintosa(&sin), lladdr, ifp); |
330 | } | | 330 | } |
331 | | | 331 | |
332 | LLE_REMREF(lle); | | 332 | LLE_REMREF(lle); |
333 | pkts_dropped = llentry_free(lle); | | 333 | pkts_dropped = llentry_free(lle); |
334 | ARP_STATADD(ARP_STAT_DFRDROPPED, pkts_dropped); | | 334 | ARP_STATADD(ARP_STAT_DFRDROPPED, pkts_dropped); |
335 | ARP_STATADD(ARP_STAT_DFRTOTAL, pkts_dropped); | | 335 | ARP_STATADD(ARP_STAT_DFRTOTAL, pkts_dropped); |
336 | } else { | | 336 | } else { |
337 | LLE_FREE_LOCKED(lle); | | 337 | LLE_FREE_LOCKED(lle); |
338 | } | | 338 | } |
339 | | | 339 | |
340 | IF_AFDATA_UNLOCK(ifp); | | 340 | IF_AFDATA_UNLOCK(ifp); |
341 | } | | 341 | } |
342 | | | 342 | |
343 | static void | | 343 | static void |
344 | arp_settimer(struct llentry *la, int sec) | | 344 | arp_settimer(struct llentry *la, int sec) |
345 | { | | 345 | { |
346 | | | 346 | |
347 | LLE_WLOCK_ASSERT(la); | | 347 | LLE_WLOCK_ASSERT(la); |
348 | KASSERT((la->la_flags & LLE_STATIC) == 0); | | 348 | KASSERT((la->la_flags & LLE_STATIC) == 0); |
349 | | | 349 | |
350 | /* | | 350 | /* |
351 | * We have to take care of a reference leak which occurs if | | 351 | * We have to take care of a reference leak which occurs if |
352 | * callout_reset overwrites a pending callout schedule. Unfortunately | | 352 | * callout_reset overwrites a pending callout schedule. Unfortunately |
353 | * we don't have a mean to know the overwrite, so we need to know it | | 353 | * we don't have a mean to know the overwrite, so we need to know it |
354 | * using callout_stop. We need to call callout_pending first to exclude | | 354 | * using callout_stop. We need to call callout_pending first to exclude |
355 | * the case that the callout has never been scheduled. | | 355 | * the case that the callout has never been scheduled. |
356 | */ | | 356 | */ |
357 | if (callout_pending(&la->la_timer)) { | | 357 | if (callout_pending(&la->la_timer)) { |
358 | bool expired = callout_stop(&la->la_timer); | | 358 | bool expired = callout_stop(&la->la_timer); |
359 | if (!expired) | | 359 | if (!expired) |
360 | /* A pending callout schedule is canceled. */ | | 360 | /* A pending callout schedule is canceled. */ |
361 | LLE_REMREF(la); | | 361 | LLE_REMREF(la); |
362 | } | | 362 | } |
363 | LLE_ADDREF(la); | | 363 | LLE_ADDREF(la); |
364 | callout_reset(&la->la_timer, hz * sec, arptimer, la); | | 364 | callout_reset(&la->la_timer, hz * sec, arptimer, la); |
365 | } | | 365 | } |
366 | | | 366 | |
367 | /* | | 367 | /* |
368 | * We set the gateway for RTF_CLONING routes to a "prototype" | | 368 | * We set the gateway for RTF_CLONING routes to a "prototype" |
369 | * link-layer sockaddr whose interface type (if_type) and interface | | 369 | * link-layer sockaddr whose interface type (if_type) and interface |
370 | * index (if_index) fields are prepared. | | 370 | * index (if_index) fields are prepared. |
371 | */ | | 371 | */ |
372 | static struct sockaddr * | | 372 | static struct sockaddr * |
373 | arp_setgate(struct rtentry *rt, struct sockaddr *gate, | | 373 | arp_setgate(struct rtentry *rt, struct sockaddr *gate, |
374 | const struct sockaddr *netmask) | | 374 | const struct sockaddr *netmask) |
375 | { | | 375 | { |
376 | const struct ifnet *ifp = rt->rt_ifp; | | 376 | const struct ifnet *ifp = rt->rt_ifp; |
377 | uint8_t namelen = strlen(ifp->if_xname); | | 377 | uint8_t namelen = strlen(ifp->if_xname); |
378 | uint8_t addrlen = ifp->if_addrlen; | | 378 | uint8_t addrlen = ifp->if_addrlen; |
379 | | | 379 | |
380 | /* | | 380 | /* |
381 | * XXX: If this is a manually added route to interface | | 381 | * XXX: If this is a manually added route to interface |
382 | * such as older version of routed or gated might provide, | | 382 | * such as older version of routed or gated might provide, |
383 | * restore cloning bit. | | 383 | * restore cloning bit. |
384 | */ | | 384 | */ |
385 | if ((rt->rt_flags & RTF_HOST) == 0 && netmask != NULL && | | 385 | if ((rt->rt_flags & RTF_HOST) == 0 && netmask != NULL && |
386 | satocsin(netmask)->sin_addr.s_addr != 0xffffffff) | | 386 | satocsin(netmask)->sin_addr.s_addr != 0xffffffff) |
387 | rt->rt_flags |= RTF_CONNECTED; | | 387 | rt->rt_flags |= RTF_CONNECTED; |
388 | | | 388 | |
389 | if ((rt->rt_flags & (RTF_CONNECTED | RTF_LOCAL))) { | | 389 | if ((rt->rt_flags & (RTF_CONNECTED | RTF_LOCAL))) { |
390 | union { | | 390 | union { |
391 | struct sockaddr sa; | | 391 | struct sockaddr sa; |
392 | struct sockaddr_storage ss; | | 392 | struct sockaddr_storage ss; |
393 | struct sockaddr_dl sdl; | | 393 | struct sockaddr_dl sdl; |
394 | } u; | | 394 | } u; |
395 | /* | | 395 | /* |
396 | * Case 1: This route should come from a route to iface. | | 396 | * Case 1: This route should come from a route to iface. |
397 | */ | | 397 | */ |
398 | sockaddr_dl_init(&u.sdl, sizeof(u.ss), | | 398 | sockaddr_dl_init(&u.sdl, sizeof(u.ss), |
399 | ifp->if_index, ifp->if_type, NULL, namelen, NULL, addrlen); | | 399 | ifp->if_index, ifp->if_type, NULL, namelen, NULL, addrlen); |
400 | rt_setgate(rt, &u.sa); | | 400 | rt_setgate(rt, &u.sa); |
401 | gate = rt->rt_gateway; | | 401 | gate = rt->rt_gateway; |
402 | } | | 402 | } |
403 | return gate; | | 403 | return gate; |
404 | } | | 404 | } |
405 | | | 405 | |
406 | static void | | 406 | static void |
407 | arp_init_llentry(struct ifnet *ifp, struct llentry *lle) | | 407 | arp_init_llentry(struct ifnet *ifp, struct llentry *lle) |
408 | { | | 408 | { |
409 | | | 409 | |
410 | switch (ifp->if_type) { | | 410 | switch (ifp->if_type) { |
411 | #if NTOKEN > 0 | | 411 | #if NTOKEN > 0 |
412 | case IFT_ISO88025: | | 412 | case IFT_ISO88025: |
413 | lle->la_opaque = kmem_intr_alloc(sizeof(struct token_rif), | | 413 | lle->la_opaque = kmem_intr_alloc(sizeof(struct token_rif), |
414 | KM_NOSLEEP); | | 414 | KM_NOSLEEP); |
415 | lle->lle_ll_free = arp_free_llentry_tokenring; | | 415 | lle->lle_ll_free = arp_free_llentry_tokenring; |
416 | break; | | 416 | break; |
417 | #endif | | 417 | #endif |
418 | } | | 418 | } |
419 | } | | 419 | } |
420 | | | 420 | |
421 | #if NTOKEN > 0 | | 421 | #if NTOKEN > 0 |
422 | static void | | 422 | static void |
423 | arp_free_llentry_tokenring(struct llentry *lle) | | 423 | arp_free_llentry_tokenring(struct llentry *lle) |
424 | { | | 424 | { |
425 | | | 425 | |
426 | kmem_intr_free(lle->la_opaque, sizeof(struct token_rif)); | | 426 | kmem_intr_free(lle->la_opaque, sizeof(struct token_rif)); |
427 | } | | 427 | } |
428 | #endif | | 428 | #endif |
429 | | | 429 | |
430 | /* | | 430 | /* |
431 | * Parallel to llc_rtrequest. | | 431 | * Parallel to llc_rtrequest. |
432 | */ | | 432 | */ |
433 | void | | 433 | void |
434 | arp_rtrequest(int req, struct rtentry *rt, const struct rt_addrinfo *info) | | 434 | arp_rtrequest(int req, struct rtentry *rt, const struct rt_addrinfo *info) |
435 | { | | 435 | { |
436 | struct sockaddr *gate = rt->rt_gateway; | | 436 | struct sockaddr *gate = rt->rt_gateway; |
437 | struct in_ifaddr *ia; | | 437 | struct in_ifaddr *ia; |
438 | struct ifaddr *ifa; | | 438 | struct ifaddr *ifa; |
439 | struct ifnet *ifp = rt->rt_ifp; | | 439 | struct ifnet *ifp = rt->rt_ifp; |
440 | int bound; | | 440 | int bound; |
441 | int s; | | 441 | int s; |
442 | | | 442 | |
443 | if (req == RTM_LLINFO_UPD) { | | 443 | if (req == RTM_LLINFO_UPD) { |
444 | if ((ifa = info->rti_ifa) != NULL) | | 444 | if ((ifa = info->rti_ifa) != NULL) |
445 | arpannounce1(ifa); | | 445 | arpannounce1(ifa); |
446 | return; | | 446 | return; |
447 | } | | 447 | } |
448 | | | 448 | |
449 | if ((rt->rt_flags & RTF_GATEWAY) != 0) { | | 449 | if ((rt->rt_flags & RTF_GATEWAY) != 0) { |
450 | if (req != RTM_ADD) | | 450 | if (req != RTM_ADD) |
451 | return; | | 451 | return; |
452 | | | 452 | |
453 | /* | | 453 | /* |
454 | * linklayers with particular link MTU limitation. | | 454 | * linklayers with particular link MTU limitation. |
455 | */ | | 455 | */ |
456 | switch(ifp->if_type) { | | 456 | switch(ifp->if_type) { |
457 | #if NFDDI > 0 | | 457 | #if NFDDI > 0 |
458 | case IFT_FDDI: | | 458 | case IFT_FDDI: |
459 | if (ifp->if_mtu > FDDIIPMTU) | | 459 | if (ifp->if_mtu > FDDIIPMTU) |
460 | rt->rt_rmx.rmx_mtu = FDDIIPMTU; | | 460 | rt->rt_rmx.rmx_mtu = FDDIIPMTU; |
461 | break; | | 461 | break; |
462 | #endif | | 462 | #endif |
463 | #if NARCNET > 0 | | 463 | #if NARCNET > 0 |
464 | case IFT_ARCNET: | | 464 | case IFT_ARCNET: |
465 | { | | 465 | { |
466 | int arcipifmtu; | | 466 | int arcipifmtu; |
467 | | | 467 | |
468 | if (ifp->if_flags & IFF_LINK0) | | 468 | if (ifp->if_flags & IFF_LINK0) |
469 | arcipifmtu = arc_ipmtu; | | 469 | arcipifmtu = arc_ipmtu; |
470 | else | | 470 | else |
471 | arcipifmtu = ARCMTU; | | 471 | arcipifmtu = ARCMTU; |
472 | if (ifp->if_mtu > arcipifmtu) | | 472 | if (ifp->if_mtu > arcipifmtu) |
473 | rt->rt_rmx.rmx_mtu = arcipifmtu; | | 473 | rt->rt_rmx.rmx_mtu = arcipifmtu; |
474 | break; | | 474 | break; |
475 | } | | 475 | } |
476 | #endif | | 476 | #endif |
477 | } | | 477 | } |
478 | return; | | 478 | return; |
479 | } | | 479 | } |
480 | | | 480 | |
481 | switch (req) { | | 481 | switch (req) { |
482 | case RTM_SETGATE: | | 482 | case RTM_SETGATE: |
483 | gate = arp_setgate(rt, gate, info->rti_info[RTAX_NETMASK]); | | 483 | gate = arp_setgate(rt, gate, info->rti_info[RTAX_NETMASK]); |
484 | break; | | 484 | break; |
485 | case RTM_ADD: | | 485 | case RTM_ADD: |
486 | gate = arp_setgate(rt, gate, info->rti_info[RTAX_NETMASK]); | | 486 | gate = arp_setgate(rt, gate, info->rti_info[RTAX_NETMASK]); |
487 | if (gate == NULL) { | | 487 | if (gate == NULL) { |
488 | log(LOG_ERR, "%s: arp_setgate failed\n", __func__); | | 488 | log(LOG_ERR, "%s: arp_setgate failed\n", __func__); |
489 | break; | | 489 | break; |
490 | } | | 490 | } |
491 | if ((rt->rt_flags & RTF_CONNECTED) || | | 491 | if ((rt->rt_flags & RTF_CONNECTED) || |
492 | (rt->rt_flags & RTF_LOCAL)) { | | 492 | (rt->rt_flags & RTF_LOCAL)) { |
493 | /* | | 493 | /* |
494 | * Give this route an expiration time, even though | | 494 | * Give this route an expiration time, even though |
495 | * it's a "permanent" route, so that routes cloned | | 495 | * it's a "permanent" route, so that routes cloned |
496 | * from it do not need their expiration time set. | | 496 | * from it do not need their expiration time set. |
497 | */ | | 497 | */ |
498 | KASSERT(time_uptime != 0); | | 498 | KASSERT(time_uptime != 0); |
499 | rt->rt_expire = time_uptime; | | 499 | rt->rt_expire = time_uptime; |
500 | /* | | 500 | /* |
501 | * linklayers with particular link MTU limitation. | | 501 | * linklayers with particular link MTU limitation. |
502 | */ | | 502 | */ |
503 | switch (ifp->if_type) { | | 503 | switch (ifp->if_type) { |
504 | #if NFDDI > 0 | | 504 | #if NFDDI > 0 |
505 | case IFT_FDDI: | | 505 | case IFT_FDDI: |
506 | if ((rt->rt_rmx.rmx_locks & RTV_MTU) == 0 && | | 506 | if ((rt->rt_rmx.rmx_locks & RTV_MTU) == 0 && |
507 | (rt->rt_rmx.rmx_mtu > FDDIIPMTU || | | 507 | (rt->rt_rmx.rmx_mtu > FDDIIPMTU || |
508 | (rt->rt_rmx.rmx_mtu == 0 && | | 508 | (rt->rt_rmx.rmx_mtu == 0 && |
509 | ifp->if_mtu > FDDIIPMTU))) | | 509 | ifp->if_mtu > FDDIIPMTU))) |
510 | rt->rt_rmx.rmx_mtu = FDDIIPMTU; | | 510 | rt->rt_rmx.rmx_mtu = FDDIIPMTU; |
511 | break; | | 511 | break; |
512 | #endif | | 512 | #endif |
513 | #if NARCNET > 0 | | 513 | #if NARCNET > 0 |
514 | case IFT_ARCNET: | | 514 | case IFT_ARCNET: |
515 | { | | 515 | { |
516 | int arcipifmtu; | | 516 | int arcipifmtu; |
517 | if (ifp->if_flags & IFF_LINK0) | | 517 | if (ifp->if_flags & IFF_LINK0) |
518 | arcipifmtu = arc_ipmtu; | | 518 | arcipifmtu = arc_ipmtu; |
519 | else | | 519 | else |
520 | arcipifmtu = ARCMTU; | | 520 | arcipifmtu = ARCMTU; |
521 | | | 521 | |
522 | if ((rt->rt_rmx.rmx_locks & RTV_MTU) == 0 && | | 522 | if ((rt->rt_rmx.rmx_locks & RTV_MTU) == 0 && |
523 | (rt->rt_rmx.rmx_mtu > arcipifmtu || | | 523 | (rt->rt_rmx.rmx_mtu > arcipifmtu || |
524 | (rt->rt_rmx.rmx_mtu == 0 && | | 524 | (rt->rt_rmx.rmx_mtu == 0 && |
525 | ifp->if_mtu > arcipifmtu))) | | 525 | ifp->if_mtu > arcipifmtu))) |
526 | rt->rt_rmx.rmx_mtu = arcipifmtu; | | 526 | rt->rt_rmx.rmx_mtu = arcipifmtu; |
527 | break; | | 527 | break; |
528 | } | | 528 | } |
529 | #endif | | 529 | #endif |
530 | } | | 530 | } |
531 | if (rt->rt_flags & RTF_CONNECTED) | | 531 | if (rt->rt_flags & RTF_CONNECTED) |
532 | break; | | 532 | break; |
533 | } | | 533 | } |
534 | | | 534 | |
535 | bound = curlwp_bind(); | | 535 | bound = curlwp_bind(); |
536 | /* Announce a new entry if requested. */ | | 536 | /* Announce a new entry if requested. */ |
537 | if (rt->rt_flags & RTF_ANNOUNCE) { | | 537 | if (rt->rt_flags & RTF_ANNOUNCE) { |
538 | struct psref psref; | | 538 | struct psref psref; |
539 | ia = in_get_ia_on_iface_psref( | | 539 | ia = in_get_ia_on_iface_psref( |
540 | satocsin(rt_getkey(rt))->sin_addr, ifp, &psref); | | 540 | satocsin(rt_getkey(rt))->sin_addr, ifp, &psref); |
541 | if (ia != NULL) { | | 541 | if (ia != NULL) { |
542 | arpannounce(ifp, &ia->ia_ifa, | | 542 | arpannounce(ifp, &ia->ia_ifa, |
543 | CLLADDR(satocsdl(gate))); | | 543 | CLLADDR(satocsdl(gate))); |
544 | ia4_release(ia, &psref); | | 544 | ia4_release(ia, &psref); |
545 | } | | 545 | } |
546 | } | | 546 | } |
547 | | | 547 | |
548 | if (gate->sa_family != AF_LINK || | | 548 | if (gate->sa_family != AF_LINK || |
549 | gate->sa_len < sockaddr_dl_measure(0, ifp->if_addrlen)) { | | 549 | gate->sa_len < sockaddr_dl_measure(0, ifp->if_addrlen)) { |
550 | log(LOG_DEBUG, "%s: bad gateway value\n", __func__); | | 550 | log(LOG_DEBUG, "%s: bad gateway value\n", __func__); |
551 | goto out; | | 551 | goto out; |
552 | } | | 552 | } |
553 | | | 553 | |
554 | satosdl(gate)->sdl_type = ifp->if_type; | | 554 | satosdl(gate)->sdl_type = ifp->if_type; |
555 | satosdl(gate)->sdl_index = ifp->if_index; | | 555 | satosdl(gate)->sdl_index = ifp->if_index; |
556 | | | 556 | |
557 | /* | | 557 | /* |
558 | * If the route is for a broadcast address mark it as such. | | 558 | * If the route is for a broadcast address mark it as such. |
559 | * This way we can avoid an expensive call to in_broadcast() | | 559 | * This way we can avoid an expensive call to in_broadcast() |
560 | * in ip_output() most of the time (because the route passed | | 560 | * in ip_output() most of the time (because the route passed |
561 | * to ip_output() is almost always a host route). | | 561 | * to ip_output() is almost always a host route). |
562 | */ | | 562 | */ |
563 | if (rt->rt_flags & RTF_HOST && | | 563 | if (rt->rt_flags & RTF_HOST && |
564 | !(rt->rt_flags & RTF_BROADCAST) && | | 564 | !(rt->rt_flags & RTF_BROADCAST) && |
565 | in_broadcast(satocsin(rt_getkey(rt))->sin_addr, rt->rt_ifp)) | | 565 | in_broadcast(satocsin(rt_getkey(rt))->sin_addr, rt->rt_ifp)) |
566 | rt->rt_flags |= RTF_BROADCAST; | | 566 | rt->rt_flags |= RTF_BROADCAST; |
567 | /* There is little point in resolving the broadcast address */ | | 567 | /* There is little point in resolving the broadcast address */ |
568 | if (rt->rt_flags & RTF_BROADCAST) | | 568 | if (rt->rt_flags & RTF_BROADCAST) |
569 | goto out; | | 569 | goto out; |
570 | | | 570 | |
571 | /* | | 571 | /* |
572 | * When called from rt_ifa_addlocal, we cannot depend on that | | 572 | * When called from rt_ifa_addlocal, we cannot depend on that |
573 | * the address (rt_getkey(rt)) exits in the address list of the | | 573 | * the address (rt_getkey(rt)) exits in the address list of the |
574 | * interface. So check RTF_LOCAL instead. | | 574 | * interface. So check RTF_LOCAL instead. |
575 | */ | | 575 | */ |
576 | if (rt->rt_flags & RTF_LOCAL) { | | 576 | if (rt->rt_flags & RTF_LOCAL) { |
577 | rt->rt_expire = 0; | | 577 | rt->rt_expire = 0; |
578 | if (useloopback) { | | 578 | if (useloopback) { |
579 | rt->rt_ifp = lo0ifp; | | 579 | rt->rt_ifp = lo0ifp; |
580 | rt->rt_rmx.rmx_mtu = 0; | | 580 | rt->rt_rmx.rmx_mtu = 0; |
581 | } | | 581 | } |
582 | goto out; | | 582 | goto out; |
583 | } | | 583 | } |
584 | | | 584 | |
585 | s = pserialize_read_enter(); | | 585 | s = pserialize_read_enter(); |
586 | ia = in_get_ia_on_iface(satocsin(rt_getkey(rt))->sin_addr, ifp); | | 586 | ia = in_get_ia_on_iface(satocsin(rt_getkey(rt))->sin_addr, ifp); |
587 | if (ia == NULL) { | | 587 | if (ia == NULL) { |
588 | pserialize_read_exit(s); | | 588 | pserialize_read_exit(s); |
589 | goto out; | | 589 | goto out; |
590 | } | | 590 | } |
591 | | | 591 | |
592 | rt->rt_expire = 0; | | 592 | rt->rt_expire = 0; |
593 | if (useloopback) { | | 593 | if (useloopback) { |
594 | rt->rt_ifp = lo0ifp; | | 594 | rt->rt_ifp = lo0ifp; |
595 | rt->rt_rmx.rmx_mtu = 0; | | 595 | rt->rt_rmx.rmx_mtu = 0; |
596 | } | | 596 | } |
597 | rt->rt_flags |= RTF_LOCAL; | | 597 | rt->rt_flags |= RTF_LOCAL; |
598 | | | 598 | |
599 | if (ISSET(info->rti_flags, RTF_DONTCHANGEIFA)) { | | 599 | if (ISSET(info->rti_flags, RTF_DONTCHANGEIFA)) { |
600 | pserialize_read_exit(s); | | 600 | pserialize_read_exit(s); |
601 | goto out; | | 601 | goto out; |
602 | } | | 602 | } |
603 | /* | | 603 | /* |
604 | * make sure to set rt->rt_ifa to the interface | | 604 | * make sure to set rt->rt_ifa to the interface |
605 | * address we are using, otherwise we will have trouble | | 605 | * address we are using, otherwise we will have trouble |
606 | * with source address selection. | | 606 | * with source address selection. |
607 | */ | | 607 | */ |
608 | ifa = &ia->ia_ifa; | | 608 | ifa = &ia->ia_ifa; |
609 | if (ifa != rt->rt_ifa) | | 609 | if (ifa != rt->rt_ifa) |
610 | /* Assume it doesn't sleep */ | | 610 | /* Assume it doesn't sleep */ |
611 | rt_replace_ifa(rt, ifa); | | 611 | rt_replace_ifa(rt, ifa); |
612 | pserialize_read_exit(s); | | 612 | pserialize_read_exit(s); |
613 | out: | | 613 | out: |
614 | curlwp_bindx(bound); | | 614 | curlwp_bindx(bound); |
615 | break; | | 615 | break; |
616 | } | | 616 | } |
617 | } | | 617 | } |
618 | | | 618 | |
619 | /* | | 619 | /* |
620 | * Broadcast an ARP request. Caller specifies: | | 620 | * Broadcast an ARP request. Caller specifies: |
621 | * - arp header source ip address | | 621 | * - arp header source ip address |
622 | * - arp header target ip address | | 622 | * - arp header target ip address |
623 | * - arp header source ethernet address | | 623 | * - arp header source ethernet address |
624 | */ | | 624 | */ |
625 | static void | | 625 | static void |
626 | arprequest(struct ifnet *ifp, | | 626 | arprequest(struct ifnet *ifp, |
627 | const struct in_addr *sip, const struct in_addr *tip, | | 627 | const struct in_addr *sip, const struct in_addr *tip, |
628 | const uint8_t *enaddr) | | 628 | const uint8_t *enaddr) |
629 | { | | 629 | { |
630 | struct mbuf *m; | | 630 | struct mbuf *m; |
631 | struct arphdr *ah; | | 631 | struct arphdr *ah; |
632 | struct sockaddr sa; | | 632 | struct sockaddr sa; |
633 | uint64_t *arps; | | 633 | uint64_t *arps; |
634 | | | 634 | |
635 | KASSERT(sip != NULL); | | 635 | KASSERT(sip != NULL); |
636 | KASSERT(tip != NULL); | | 636 | KASSERT(tip != NULL); |
637 | KASSERT(enaddr != NULL); | | 637 | KASSERT(enaddr != NULL); |
638 | | | 638 | |
639 | if ((m = m_gethdr(M_DONTWAIT, MT_DATA)) == NULL) | | 639 | if ((m = m_gethdr(M_DONTWAIT, MT_DATA)) == NULL) |
640 | return; | | 640 | return; |
641 | MCLAIM(m, &arpdomain.dom_mowner); | | 641 | MCLAIM(m, &arpdomain.dom_mowner); |
642 | switch (ifp->if_type) { | | 642 | switch (ifp->if_type) { |
643 | case IFT_IEEE1394: | | 643 | case IFT_IEEE1394: |
644 | m->m_len = sizeof(*ah) + 2 * sizeof(struct in_addr) + | | 644 | m->m_len = sizeof(*ah) + 2 * sizeof(struct in_addr) + |
645 | ifp->if_addrlen; | | 645 | ifp->if_addrlen; |
646 | break; | | 646 | break; |
647 | default: | | 647 | default: |
648 | m->m_len = sizeof(*ah) + 2 * sizeof(struct in_addr) + | | 648 | m->m_len = sizeof(*ah) + 2 * sizeof(struct in_addr) + |
649 | 2 * ifp->if_addrlen; | | 649 | 2 * ifp->if_addrlen; |
650 | break; | | 650 | break; |
651 | } | | 651 | } |
652 | m->m_pkthdr.len = m->m_len; | | 652 | m->m_pkthdr.len = m->m_len; |
653 | m_align(m, m->m_len); | | 653 | m_align(m, m->m_len); |
654 | ah = mtod(m, struct arphdr *); | | 654 | ah = mtod(m, struct arphdr *); |
655 | memset(ah, 0, m->m_len); | | 655 | memset(ah, 0, m->m_len); |
656 | switch (ifp->if_type) { | | 656 | switch (ifp->if_type) { |
657 | case IFT_IEEE1394: /* RFC2734 */ | | 657 | case IFT_IEEE1394: /* RFC2734 */ |
658 | /* fill it now for ar_tpa computation */ | | 658 | /* fill it now for ar_tpa computation */ |
659 | ah->ar_hrd = htons(ARPHRD_IEEE1394); | | 659 | ah->ar_hrd = htons(ARPHRD_IEEE1394); |
660 | break; | | 660 | break; |
661 | default: | | 661 | default: |
662 | /* ifp->if_output will fill ar_hrd */ | | 662 | /* ifp->if_output will fill ar_hrd */ |
663 | break; | | 663 | break; |
664 | } | | 664 | } |
665 | ah->ar_pro = htons(ETHERTYPE_IP); | | 665 | ah->ar_pro = htons(ETHERTYPE_IP); |
666 | ah->ar_hln = ifp->if_addrlen; /* hardware address length */ | | 666 | ah->ar_hln = ifp->if_addrlen; /* hardware address length */ |
667 | ah->ar_pln = sizeof(struct in_addr); /* protocol address length */ | | 667 | ah->ar_pln = sizeof(struct in_addr); /* protocol address length */ |
668 | ah->ar_op = htons(ARPOP_REQUEST); | | 668 | ah->ar_op = htons(ARPOP_REQUEST); |
669 | memcpy(ar_sha(ah), enaddr, ah->ar_hln); | | 669 | memcpy(ar_sha(ah), enaddr, ah->ar_hln); |
670 | memcpy(ar_spa(ah), sip, ah->ar_pln); | | 670 | memcpy(ar_spa(ah), sip, ah->ar_pln); |
671 | memcpy(ar_tpa(ah), tip, ah->ar_pln); | | 671 | memcpy(ar_tpa(ah), tip, ah->ar_pln); |
672 | sa.sa_family = AF_ARP; | | 672 | sa.sa_family = AF_ARP; |
673 | sa.sa_len = 2; | | 673 | sa.sa_len = 2; |
674 | m->m_flags |= M_BCAST; | | 674 | m->m_flags |= M_BCAST; |
675 | arps = ARP_STAT_GETREF(); | | 675 | arps = ARP_STAT_GETREF(); |
676 | arps[ARP_STAT_SNDTOTAL]++; | | 676 | arps[ARP_STAT_SNDTOTAL]++; |
677 | arps[ARP_STAT_SENDREQUEST]++; | | 677 | arps[ARP_STAT_SENDREQUEST]++; |
678 | ARP_STAT_PUTREF(); | | 678 | ARP_STAT_PUTREF(); |
679 | if_output_lock(ifp, ifp, m, &sa, NULL); | | 679 | if_output_lock(ifp, ifp, m, &sa, NULL); |
680 | } | | 680 | } |
681 | | | 681 | |
682 | void | | 682 | void |
683 | arpannounce(struct ifnet *ifp, struct ifaddr *ifa, const uint8_t *enaddr) | | 683 | arpannounce(struct ifnet *ifp, struct ifaddr *ifa, const uint8_t *enaddr) |
684 | { | | 684 | { |
685 | struct in_ifaddr *ia = ifatoia(ifa); | | 685 | struct in_ifaddr *ia = ifatoia(ifa); |
686 | struct in_addr *ip = &IA_SIN(ifa)->sin_addr; | | 686 | struct in_addr *ip = &IA_SIN(ifa)->sin_addr; |
687 | | | 687 | |
688 | if (ia->ia4_flags & (IN_IFF_NOTREADY | IN_IFF_DETACHED)) { | | 688 | if (ia->ia4_flags & (IN_IFF_NOTREADY | IN_IFF_DETACHED)) { |
689 | ARPLOG(LOG_DEBUG, "%s not ready\n", ARPLOGADDR(ip)); | | 689 | ARPLOG(LOG_DEBUG, "%s not ready\n", ARPLOGADDR(ip)); |
690 | return; | | 690 | return; |
691 | } | | 691 | } |
692 | arprequest(ifp, ip, ip, enaddr); | | 692 | arprequest(ifp, ip, ip, enaddr); |
693 | } | | 693 | } |
694 | | | 694 | |
695 | static void | | 695 | static void |
696 | arpannounce1(struct ifaddr *ifa) | | 696 | arpannounce1(struct ifaddr *ifa) |
697 | { | | 697 | { |
698 | | | 698 | |
699 | arpannounce(ifa->ifa_ifp, ifa, CLLADDR(ifa->ifa_ifp->if_sadl)); | | 699 | arpannounce(ifa->ifa_ifp, ifa, CLLADDR(ifa->ifa_ifp->if_sadl)); |
700 | } | | 700 | } |
701 | | | 701 | |
702 | /* | | 702 | /* |
703 | * Resolve an IP address into an ethernet address. If success, desten is | | 703 | * Resolve an IP address into an ethernet address. If success, desten is |
704 | * filled in. If there is no entry in arptab, set one up and broadcast a | | 704 | * filled in. If there is no entry in arptab, set one up and broadcast a |
705 | * request for the IP address. Hold onto this mbuf and resend it once the | | 705 | * request for the IP address. Hold onto this mbuf and resend it once the |
706 | * address is finally resolved. | | 706 | * address is finally resolved. |
707 | * | | 707 | * |
708 | * A return value of 0 indicates that desten has been filled in and the packet | | 708 | * A return value of 0 indicates that desten has been filled in and the packet |
709 | * should be sent normally; a return value of EWOULDBLOCK indicates that the | | 709 | * should be sent normally; a return value of EWOULDBLOCK indicates that the |
710 | * packet has been held pending resolution. Any other value indicates an | | 710 | * packet has been held pending resolution. Any other value indicates an |
711 | * error. | | 711 | * error. |
712 | */ | | 712 | */ |
713 | int | | 713 | int |
714 | arpresolve(struct ifnet *ifp, const struct rtentry *rt, struct mbuf *m, | | 714 | arpresolve(struct ifnet *ifp, const struct rtentry *rt, struct mbuf *m, |
715 | const struct sockaddr *dst, void *desten, size_t destlen) | | 715 | const struct sockaddr *dst, void *desten, size_t destlen) |
716 | { | | 716 | { |
717 | struct llentry *la; | | 717 | struct llentry *la; |
718 | const char *create_lookup; | | 718 | const char *create_lookup; |
719 | bool renew; | | 719 | bool renew; |
720 | int error; | | 720 | int error; |
721 | struct ifnet *origifp = ifp; | | 721 | struct ifnet *origifp = ifp; |
722 | | | 722 | |
723 | #if NCARP > 0 | | 723 | #if NCARP > 0 |
724 | if (rt != NULL && rt->rt_ifp->if_type == IFT_CARP) | | 724 | if (rt != NULL && rt->rt_ifp->if_type == IFT_CARP) |
725 | ifp = rt->rt_ifp; | | 725 | ifp = rt->rt_ifp; |
726 | #endif | | 726 | #endif |
727 | | | 727 | |
728 | KASSERT(m != NULL); | | 728 | KASSERT(m != NULL); |
729 | | | 729 | |
730 | la = arplookup(ifp, NULL, dst, 0); | | 730 | la = arplookup(ifp, NULL, dst, 0); |
731 | if (la == NULL) | | 731 | if (la == NULL) |
732 | goto notfound; | | 732 | goto notfound; |
733 | | | 733 | |
734 | if ((la->la_flags & LLE_VALID) && | | 734 | if ((la->la_flags & LLE_VALID) && |
735 | ((la->la_flags & LLE_STATIC) || la->la_expire > time_uptime)) { | | 735 | ((la->la_flags & LLE_STATIC) || la->la_expire > time_uptime)) { |
736 | KASSERT(destlen >= ifp->if_addrlen); | | 736 | KASSERT(destlen >= ifp->if_addrlen); |
737 | memcpy(desten, &la->ll_addr, ifp->if_addrlen); | | 737 | memcpy(desten, &la->ll_addr, ifp->if_addrlen); |
738 | LLE_RUNLOCK(la); | | 738 | LLE_RUNLOCK(la); |
739 | return 0; | | 739 | return 0; |
740 | } | | 740 | } |
741 | | | 741 | |
742 | notfound: | | 742 | notfound: |
743 | if (ifp->if_flags & IFF_NOARP) { | | 743 | if (ifp->if_flags & IFF_NOARP) { |
744 | if (la != NULL) | | 744 | if (la != NULL) |
745 | LLE_RUNLOCK(la); | | 745 | LLE_RUNLOCK(la); |
746 | error = ENOTSUP; | | 746 | error = ENOTSUP; |
747 | goto bad; | | 747 | goto bad; |
748 | } | | 748 | } |
749 | | | 749 | |
750 | if (la == NULL) { | | 750 | if (la == NULL) { |
751 | struct rtentry *_rt; | | 751 | struct rtentry *_rt; |
752 | | | 752 | |
753 | create_lookup = "create"; | | 753 | create_lookup = "create"; |
754 | _rt = rtalloc1(dst, 0); | | 754 | _rt = rtalloc1(dst, 0); |
755 | IF_AFDATA_WLOCK(ifp); | | 755 | IF_AFDATA_WLOCK(ifp); |
756 | la = lla_create(LLTABLE(ifp), LLE_EXCLUSIVE, dst, _rt); | | 756 | la = lla_create(LLTABLE(ifp), LLE_EXCLUSIVE, dst, _rt); |
757 | IF_AFDATA_WUNLOCK(ifp); | | 757 | IF_AFDATA_WUNLOCK(ifp); |
758 | if (_rt != NULL) | | 758 | if (_rt != NULL) |
759 | rt_unref(_rt); | | 759 | rt_unref(_rt); |
760 | if (la == NULL) | | 760 | if (la == NULL) |
761 | ARP_STATINC(ARP_STAT_ALLOCFAIL); | | 761 | ARP_STATINC(ARP_STAT_ALLOCFAIL); |
762 | else | | 762 | else |
763 | arp_init_llentry(ifp, la); | | 763 | arp_init_llentry(ifp, la); |
764 | } else if (LLE_TRY_UPGRADE(la) == 0) { | | 764 | } else if (LLE_TRY_UPGRADE(la) == 0) { |
765 | create_lookup = "lookup"; | | 765 | create_lookup = "lookup"; |
766 | LLE_RUNLOCK(la); | | 766 | LLE_RUNLOCK(la); |
767 | IF_AFDATA_RLOCK(ifp); | | 767 | IF_AFDATA_RLOCK(ifp); |
768 | la = lla_lookup(LLTABLE(ifp), LLE_EXCLUSIVE, dst); | | 768 | la = lla_lookup(LLTABLE(ifp), LLE_EXCLUSIVE, dst); |
769 | IF_AFDATA_RUNLOCK(ifp); | | 769 | IF_AFDATA_RUNLOCK(ifp); |
770 | } | | 770 | } |
771 | | | 771 | |
772 | error = EINVAL; | | 772 | error = EINVAL; |
773 | if (la == NULL) { | | 773 | if (la == NULL) { |
774 | log(LOG_DEBUG, | | 774 | log(LOG_DEBUG, |
775 | "%s: failed to %s llentry for %s on %s\n", | | 775 | "%s: failed to %s llentry for %s on %s\n", |
776 | __func__, create_lookup, inet_ntoa(satocsin(dst)->sin_addr), | | 776 | __func__, create_lookup, inet_ntoa(satocsin(dst)->sin_addr), |
777 | ifp->if_xname); | | 777 | ifp->if_xname); |
778 | goto bad; | | 778 | goto bad; |
779 | } | | 779 | } |
780 | | | 780 | |
781 | if ((la->la_flags & LLE_VALID) && | | 781 | if ((la->la_flags & LLE_VALID) && |
782 | ((la->la_flags & LLE_STATIC) || la->la_expire > time_uptime)) | | 782 | ((la->la_flags & LLE_STATIC) || la->la_expire > time_uptime)) |
783 | { | | 783 | { |
784 | KASSERT(destlen >= ifp->if_addrlen); | | 784 | KASSERT(destlen >= ifp->if_addrlen); |
785 | memcpy(desten, &la->ll_addr, ifp->if_addrlen); | | 785 | memcpy(desten, &la->ll_addr, ifp->if_addrlen); |
786 | renew = false; | | 786 | renew = false; |
787 | /* | | 787 | /* |
788 | * If entry has an expiry time and it is approaching, | | 788 | * If entry has an expiry time and it is approaching, |
789 | * see if we need to send an ARP request within this | | 789 | * see if we need to send an ARP request within this |
790 | * arpt_down interval. | | 790 | * arpt_down interval. |
791 | */ | | 791 | */ |
792 | if (!(la->la_flags & LLE_STATIC) && | | 792 | if (!(la->la_flags & LLE_STATIC) && |
793 | time_uptime + la->la_preempt > la->la_expire) | | 793 | time_uptime + la->la_preempt > la->la_expire) |
794 | { | | 794 | { |
795 | renew = true; | | 795 | renew = true; |
796 | la->la_preempt--; | | 796 | la->la_preempt--; |
797 | } | | 797 | } |
798 | | | 798 | |
799 | LLE_WUNLOCK(la); | | 799 | LLE_WUNLOCK(la); |
800 | | | 800 | |
801 | if (renew) { | | 801 | if (renew) { |
802 | const uint8_t *enaddr = CLLADDR(ifp->if_sadl); | | 802 | const uint8_t *enaddr = CLLADDR(ifp->if_sadl); |
803 | arprequest(origifp, | | 803 | arprequest(origifp, |
804 | &satocsin(rt->rt_ifa->ifa_addr)->sin_addr, | | 804 | &satocsin(rt->rt_ifa->ifa_addr)->sin_addr, |
805 | &satocsin(dst)->sin_addr, enaddr); | | 805 | &satocsin(dst)->sin_addr, enaddr); |
806 | } | | 806 | } |
807 | | | 807 | |
808 | return 0; | | 808 | return 0; |
809 | } | | 809 | } |
810 | | | 810 | |
811 | if (la->la_flags & LLE_STATIC) { /* should not happen! */ | | 811 | if (la->la_flags & LLE_STATIC) { /* should not happen! */ |
812 | LLE_RUNLOCK(la); | | 812 | LLE_RUNLOCK(la); |
813 | log(LOG_DEBUG, "%s: ouch, empty static llinfo for %s\n", | | 813 | log(LOG_DEBUG, "%s: ouch, empty static llinfo for %s\n", |
814 | __func__, inet_ntoa(satocsin(dst)->sin_addr)); | | 814 | __func__, inet_ntoa(satocsin(dst)->sin_addr)); |
815 | error = EINVAL; | | 815 | error = EINVAL; |
816 | goto bad; | | 816 | goto bad; |
817 | } | | 817 | } |
818 | | | 818 | |
819 | renew = (la->la_asked == 0 || la->la_expire != time_uptime); | | 819 | renew = (la->la_asked == 0 || la->la_expire != time_uptime); |
820 | | | 820 | |
821 | /* | | 821 | /* |
822 | * There is an arptab entry, but no ethernet address | | 822 | * There is an arptab entry, but no ethernet address |
823 | * response yet. Add the mbuf to the list, dropping | | 823 | * response yet. Add the mbuf to the list, dropping |
824 | * the oldest packet if we have exceeded the system | | 824 | * the oldest packet if we have exceeded the system |
825 | * setting. | | 825 | * setting. |
826 | */ | | 826 | */ |
827 | LLE_WLOCK_ASSERT(la); | | 827 | LLE_WLOCK_ASSERT(la); |
828 | if (la->la_numheld >= arp_maxhold) { | | 828 | if (la->la_numheld >= arp_maxhold) { |
829 | if (la->la_hold != NULL) { | | 829 | if (la->la_hold != NULL) { |
830 | struct mbuf *next = la->la_hold->m_nextpkt; | | 830 | struct mbuf *next = la->la_hold->m_nextpkt; |
831 | m_freem(la->la_hold); | | 831 | m_freem(la->la_hold); |
832 | la->la_hold = next; | | 832 | la->la_hold = next; |
833 | la->la_numheld--; | | 833 | la->la_numheld--; |
834 | ARP_STATINC(ARP_STAT_DFRDROPPED); | | 834 | ARP_STATINC(ARP_STAT_DFRDROPPED); |
835 | ARP_STATINC(ARP_STAT_DFRTOTAL); | | 835 | ARP_STATINC(ARP_STAT_DFRTOTAL); |
836 | } | | 836 | } |
837 | } | | 837 | } |
838 | if (la->la_hold != NULL) { | | 838 | if (la->la_hold != NULL) { |
839 | struct mbuf *curr = la->la_hold; | | 839 | struct mbuf *curr = la->la_hold; |
840 | while (curr->m_nextpkt != NULL) | | 840 | while (curr->m_nextpkt != NULL) |
841 | curr = curr->m_nextpkt; | | 841 | curr = curr->m_nextpkt; |
842 | curr->m_nextpkt = m; | | 842 | curr->m_nextpkt = m; |
843 | } else | | 843 | } else |
844 | la->la_hold = m; | | 844 | la->la_hold = m; |
845 | la->la_numheld++; | | 845 | la->la_numheld++; |
846 | if (!renew) | | 846 | if (!renew) |
847 | LLE_DOWNGRADE(la); | | 847 | LLE_DOWNGRADE(la); |
848 | | | 848 | |
849 | /* | | 849 | /* |
850 | * Return EWOULDBLOCK if we have tried less than arp_maxtries. It | | 850 | * Return EWOULDBLOCK if we have tried less than arp_maxtries. It |
851 | * will be masked by ether_output(). Return EHOSTDOWN/EHOSTUNREACH | | 851 | * will be masked by ether_output(). Return EHOSTDOWN/EHOSTUNREACH |
852 | * if we have already sent arp_maxtries ARP requests. Retransmit the | | 852 | * if we have already sent arp_maxtries ARP requests. Retransmit the |
853 | * ARP request, but not faster than one request per second. | | 853 | * ARP request, but not faster than one request per second. |
854 | */ | | 854 | */ |
855 | if (la->la_asked < arp_maxtries) | | 855 | if (la->la_asked < arp_maxtries) |
856 | error = EWOULDBLOCK; /* First request. */ | | 856 | error = EWOULDBLOCK; /* First request. */ |
857 | else | | 857 | else |
858 | error = (rt != NULL && rt->rt_flags & RTF_GATEWAY) ? | | 858 | error = (rt != NULL && rt->rt_flags & RTF_GATEWAY) ? |
859 | EHOSTUNREACH : EHOSTDOWN; | | 859 | EHOSTUNREACH : EHOSTDOWN; |
860 | | | 860 | |
861 | if (renew) { | | 861 | if (renew) { |
862 | const uint8_t *enaddr = CLLADDR(ifp->if_sadl); | | 862 | const uint8_t *enaddr = CLLADDR(ifp->if_sadl); |
863 | struct sockaddr_in sin; | | 863 | struct sockaddr_in sin; |
864 | | | 864 | |
865 | la->la_expire = time_uptime; | | 865 | la->la_expire = time_uptime; |
866 | arp_settimer(la, arpt_down); | | 866 | arp_settimer(la, arpt_down); |
867 | la->la_asked++; | | 867 | la->la_asked++; |
868 | | | 868 | |
869 | sockaddr_in_init(&sin, &la->r_l3addr.addr4, 0); | | 869 | sockaddr_in_init(&sin, &la->r_l3addr.addr4, 0); |
870 | if (error != EWOULDBLOCK) | | 870 | if (error != EWOULDBLOCK) |
871 | rt_clonedmsg(RTM_MISS, sintosa(&sin), NULL, ifp); | | 871 | rt_clonedmsg(RTM_MISS, sintosa(&sin), NULL, ifp); |
872 | | | 872 | |
873 | LLE_WUNLOCK(la); | | 873 | LLE_WUNLOCK(la); |
874 | | | 874 | |
875 | if (rt != NULL) { | | 875 | if (rt != NULL) { |
876 | arprequest(origifp, | | 876 | arprequest(origifp, |
877 | &satocsin(rt->rt_ifa->ifa_addr)->sin_addr, | | 877 | &satocsin(rt->rt_ifa->ifa_addr)->sin_addr, |
878 | &satocsin(dst)->sin_addr, enaddr); | | 878 | &satocsin(dst)->sin_addr, enaddr); |
879 | } else { | | 879 | } else { |
880 | struct rtentry *_rt; | | 880 | struct rtentry *_rt; |
881 | | | 881 | |
882 | /* XXX */ | | 882 | /* XXX */ |
883 | _rt = rtalloc1((struct sockaddr *)&sin, 0); | | 883 | _rt = rtalloc1((struct sockaddr *)&sin, 0); |
884 | if (_rt == NULL) | | 884 | if (_rt == NULL) |
885 | goto bad; | | 885 | goto bad; |
886 | arprequest(origifp, | | 886 | arprequest(origifp, |
887 | &satocsin(_rt->rt_ifa->ifa_addr)->sin_addr, | | 887 | &satocsin(_rt->rt_ifa->ifa_addr)->sin_addr, |
888 | &satocsin(dst)->sin_addr, enaddr); | | 888 | &satocsin(dst)->sin_addr, enaddr); |
889 | rt_unref(_rt); | | 889 | rt_unref(_rt); |
890 | } | | 890 | } |
891 | return error; | | 891 | return error; |
892 | } | | 892 | } |
893 | | | 893 | |
894 | LLE_RUNLOCK(la); | | 894 | LLE_RUNLOCK(la); |
895 | return error; | | 895 | return error; |
896 | | | 896 | |
897 | bad: | | 897 | bad: |
898 | m_freem(m); | | 898 | m_freem(m); |
899 | return error; | | 899 | return error; |
900 | } | | 900 | } |
901 | | | 901 | |
902 | /* | | 902 | /* |
903 | * Common length and type checks are done here, | | 903 | * Common length and type checks are done here, |
904 | * then the protocol-specific routine is called. | | 904 | * then the protocol-specific routine is called. |
905 | */ | | 905 | */ |
906 | void | | 906 | void |
907 | arpintr(void) | | 907 | arpintr(void) |
908 | { | | 908 | { |
909 | struct mbuf *m; | | 909 | struct mbuf *m; |
910 | struct arphdr *ar; | | 910 | struct arphdr *ar; |
911 | int s; | | 911 | int s; |
912 | int arplen; | | 912 | int arplen; |
913 | | | 913 | |
914 | SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); | | 914 | SOFTNET_KERNEL_LOCK_UNLESS_NET_MPSAFE(); |
915 | for (;;) { | | 915 | for (;;) { |
916 | struct ifnet *rcvif; | | 916 | struct ifnet *rcvif; |
917 | | | 917 | |
918 | IFQ_LOCK(&arpintrq); | | 918 | IFQ_LOCK(&arpintrq); |
919 | IF_DEQUEUE(&arpintrq, m); | | 919 | IF_DEQUEUE(&arpintrq, m); |
920 | IFQ_UNLOCK(&arpintrq); | | 920 | IFQ_UNLOCK(&arpintrq); |
921 | if (m == NULL) | | 921 | if (m == NULL) |
922 | goto out; | | 922 | goto out; |
923 | if ((m->m_flags & M_PKTHDR) == 0) | | 923 | if ((m->m_flags & M_PKTHDR) == 0) |
924 | panic("arpintr"); | | 924 | panic("arpintr"); |
925 | | | 925 | |
926 | MCLAIM(m, &arpdomain.dom_mowner); | | 926 | MCLAIM(m, &arpdomain.dom_mowner); |
927 | ARP_STATINC(ARP_STAT_RCVTOTAL); | | 927 | ARP_STATINC(ARP_STAT_RCVTOTAL); |
928 | | | 928 | |
929 | arplen = sizeof(struct arphdr); | | 929 | arplen = sizeof(struct arphdr); |
930 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) | | 930 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) |
931 | goto badlen; | | 931 | goto badlen; |
932 | ar = mtod(m, struct arphdr *); | | 932 | ar = mtod(m, struct arphdr *); |
933 | | | 933 | |
934 | rcvif = m_get_rcvif(m, &s); | | 934 | rcvif = m_get_rcvif(m, &s); |
935 | if (__predict_false(rcvif == NULL)) { | | 935 | if (__predict_false(rcvif == NULL)) { |
936 | ARP_STATINC(ARP_STAT_RCVNOINT); | | 936 | ARP_STATINC(ARP_STAT_RCVNOINT); |
937 | goto free; | | 937 | goto free; |
938 | } | | 938 | } |
939 | | | 939 | |
940 | /* | | 940 | /* |
941 | * We don't want non-IEEE1394 ARP packets on IEEE1394 | | 941 | * We don't want non-IEEE1394 ARP packets on IEEE1394 |
942 | * interfaces, and vice versa. Our life depends on that. | | 942 | * interfaces, and vice versa. Our life depends on that. |
943 | */ | | 943 | */ |
944 | switch (rcvif->if_type) { | | 944 | switch (rcvif->if_type) { |
945 | case IFT_IEEE1394: | | 945 | case IFT_IEEE1394: |
946 | if (ntohs(ar->ar_hrd) != ARPHRD_IEEE1394) { | | 946 | if (ntohs(ar->ar_hrd) != ARPHRD_IEEE1394) { |
947 | m_put_rcvif(rcvif, &s); | | 947 | m_put_rcvif(rcvif, &s); |
948 | ARP_STATINC(ARP_STAT_RCVBADPROTO); | | 948 | ARP_STATINC(ARP_STAT_RCVBADPROTO); |
949 | goto free; | | 949 | goto free; |
950 | } | | 950 | } |
951 | | | 951 | |
952 | arplen = sizeof(struct arphdr) + | | 952 | arplen = sizeof(struct arphdr) + |
953 | ar->ar_hln + 2 * ar->ar_pln; | | 953 | ar->ar_hln + 2 * ar->ar_pln; |
954 | break; | | 954 | break; |
955 | default: | | 955 | default: |
956 | if (ntohs(ar->ar_hrd) == ARPHRD_IEEE1394) { | | 956 | if (ntohs(ar->ar_hrd) == ARPHRD_IEEE1394) { |
957 | m_put_rcvif(rcvif, &s); | | 957 | m_put_rcvif(rcvif, &s); |
958 | ARP_STATINC(ARP_STAT_RCVBADPROTO); | | 958 | ARP_STATINC(ARP_STAT_RCVBADPROTO); |
959 | goto free; | | 959 | goto free; |
960 | } | | 960 | } |
961 | | | 961 | |
962 | arplen = sizeof(struct arphdr) + | | 962 | arplen = sizeof(struct arphdr) + |
963 | 2 * ar->ar_hln + 2 * ar->ar_pln; | | 963 | 2 * ar->ar_hln + 2 * ar->ar_pln; |
964 | break; | | 964 | break; |
965 | } | | 965 | } |
966 | | | 966 | |
967 | m_put_rcvif(rcvif, &s); | | 967 | m_put_rcvif(rcvif, &s); |
968 | | | 968 | |
969 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) | | 969 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) |
970 | goto badlen; | | 970 | goto badlen; |
971 | ar = mtod(m, struct arphdr *); | | 971 | ar = mtod(m, struct arphdr *); |
972 | | | 972 | |
973 | switch (ntohs(ar->ar_pro)) { | | 973 | switch (ntohs(ar->ar_pro)) { |
974 | case ETHERTYPE_IP: | | 974 | case ETHERTYPE_IP: |
975 | case ETHERTYPE_IPTRAILERS: | | 975 | case ETHERTYPE_IPTRAILERS: |
976 | in_arpinput(m); | | 976 | in_arpinput(m); |
977 | continue; | | 977 | continue; |
978 | default: | | 978 | default: |
979 | ARP_STATINC(ARP_STAT_RCVBADPROTO); | | 979 | ARP_STATINC(ARP_STAT_RCVBADPROTO); |
980 | goto free; | | 980 | goto free; |
981 | } | | 981 | } |
982 | | | 982 | |
983 | badlen: | | 983 | badlen: |
984 | ARP_STATINC(ARP_STAT_RCVBADLEN); | | 984 | ARP_STATINC(ARP_STAT_RCVBADLEN); |
985 | free: | | 985 | free: |
986 | m_freem(m); | | 986 | m_freem(m); |
987 | } | | 987 | } |
988 | | | 988 | |
989 | out: | | 989 | out: |
990 | SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); | | 990 | SOFTNET_KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); |
991 | return; /* XXX gcc */ | | 991 | return; /* XXX gcc */ |
992 | } | | 992 | } |
993 | | | 993 | |
994 | /* | | 994 | /* |
995 | * ARP for Internet protocols on 10 Mb/s Ethernet. Algorithm is that given in | | 995 | * ARP for Internet protocols on 10 Mb/s Ethernet. Algorithm is that given in |
996 | * RFC 826. In addition, a sanity check is performed on the sender protocol | | 996 | * RFC 826. In addition, a sanity check is performed on the sender protocol |
997 | * address, to catch impersonators. | | 997 | * address, to catch impersonators. |
998 | * | | 998 | * |
999 | * We no longer handle negotiations for use of trailer protocol: formerly, ARP | | 999 | * We no longer handle negotiations for use of trailer protocol: formerly, ARP |
1000 | * replied for protocol type ETHERTYPE_TRAIL sent along with IP replies if we | | 1000 | * replied for protocol type ETHERTYPE_TRAIL sent along with IP replies if we |
1001 | * wanted trailers sent to us, and also sent them in response to IP replies. | | 1001 | * wanted trailers sent to us, and also sent them in response to IP replies. |
1002 | * This allowed either end to announce the desire to receive trailer packets. | | 1002 | * This allowed either end to announce the desire to receive trailer packets. |
1003 | * | | 1003 | * |
1004 | * We no longer reply to requests for ETHERTYPE_TRAIL protocol either, but | | 1004 | * We no longer reply to requests for ETHERTYPE_TRAIL protocol either, but |
1005 | * formerly didn't normally send requests. | | 1005 | * formerly didn't normally send requests. |
1006 | */ | | 1006 | */ |
1007 | static void | | 1007 | static void |
1008 | in_arpinput(struct mbuf *m) | | 1008 | in_arpinput(struct mbuf *m) |
1009 | { | | 1009 | { |
1010 | struct arphdr *ah; | | 1010 | struct arphdr *ah; |
1011 | struct ifnet *ifp, *rcvif = NULL; | | 1011 | struct ifnet *ifp, *rcvif = NULL; |
1012 | struct llentry *la = NULL; | | 1012 | struct llentry *la = NULL; |
1013 | struct in_ifaddr *ia = NULL; | | 1013 | struct in_ifaddr *ia = NULL; |
1014 | #if NBRIDGE > 0 | | 1014 | #if NBRIDGE > 0 |
1015 | struct in_ifaddr *bridge_ia = NULL; | | 1015 | struct in_ifaddr *bridge_ia = NULL; |
1016 | #endif | | 1016 | #endif |
1017 | #if NCARP > 0 | | 1017 | #if NCARP > 0 |
1018 | uint32_t count = 0, index = 0; | | 1018 | uint32_t count = 0, index = 0; |
1019 | #endif | | 1019 | #endif |
1020 | struct sockaddr sa; | | 1020 | struct sockaddr sa; |
1021 | struct in_addr isaddr, itaddr, myaddr; | | 1021 | struct in_addr isaddr, itaddr, myaddr; |
1022 | int op, rt_cmd; | | 1022 | int op, rt_cmd; |
1023 | void *tha; | | 1023 | void *tha; |
1024 | uint64_t *arps; | | 1024 | uint64_t *arps; |
1025 | struct psref psref, psref_ia; | | 1025 | struct psref psref, psref_ia; |
1026 | int s; | | 1026 | int s; |
1027 | char ipbuf[INET_ADDRSTRLEN]; | | 1027 | char ipbuf[INET_ADDRSTRLEN]; |
1028 | bool do_dad; | | 1028 | bool do_dad; |
1029 | | | 1029 | |
1030 | if (__predict_false(m_makewritable(&m, 0, m->m_pkthdr.len, M_DONTWAIT))) | | 1030 | if (__predict_false(m_makewritable(&m, 0, m->m_pkthdr.len, M_DONTWAIT))) |
1031 | goto out; | | 1031 | goto out; |
1032 | ah = mtod(m, struct arphdr *); | | 1032 | ah = mtod(m, struct arphdr *); |
1033 | op = ntohs(ah->ar_op); | | 1033 | op = ntohs(ah->ar_op); |
1034 | | | 1034 | |
1035 | if (ah->ar_pln != sizeof(struct in_addr)) | | 1035 | if (ah->ar_pln != sizeof(struct in_addr)) |
1036 | goto out; | | 1036 | goto out; |
1037 | | | 1037 | |
1038 | ifp = if_get_bylla(ar_sha(ah), ah->ar_hln, &psref); | | 1038 | ifp = if_get_bylla(ar_sha(ah), ah->ar_hln, &psref); |
1039 | if (ifp) { | | 1039 | if (ifp) { |
1040 | /* it's from me, ignore it. */ | | 1040 | /* it's from me, ignore it. */ |
1041 | if_put(ifp, &psref); | | 1041 | if_put(ifp, &psref); |
1042 | ARP_STATINC(ARP_STAT_RCVLOCALSHA); | | 1042 | ARP_STATINC(ARP_STAT_RCVLOCALSHA); |
1043 | goto out; | | 1043 | goto out; |
1044 | } | | 1044 | } |
1045 | | | 1045 | |
1046 | rcvif = ifp = m_get_rcvif_psref(m, &psref); | | 1046 | rcvif = ifp = m_get_rcvif_psref(m, &psref); |
1047 | if (__predict_false(rcvif == NULL)) | | 1047 | if (__predict_false(rcvif == NULL)) |
1048 | goto out; | | 1048 | goto out; |
1049 | if (rcvif->if_flags & IFF_NOARP) | | 1049 | if (rcvif->if_flags & IFF_NOARP) |
1050 | goto out; | | 1050 | goto out; |
1051 | | | 1051 | |
1052 | memcpy(&isaddr, ar_spa(ah), sizeof(isaddr)); | | 1052 | memcpy(&isaddr, ar_spa(ah), sizeof(isaddr)); |
1053 | memcpy(&itaddr, ar_tpa(ah), sizeof(itaddr)); | | 1053 | memcpy(&itaddr, ar_tpa(ah), sizeof(itaddr)); |
1054 | | | 1054 | |
1055 | if (m->m_flags & (M_BCAST|M_MCAST)) | | 1055 | if (m->m_flags & (M_BCAST|M_MCAST)) |
1056 | ARP_STATINC(ARP_STAT_RCVMCAST); | | 1056 | ARP_STATINC(ARP_STAT_RCVMCAST); |
1057 | | | 1057 | |
1058 | /* | | 1058 | /* |
1059 | * Search for a matching interface address | | 1059 | * Search for a matching interface address |
1060 | * or any address on the interface to use | | 1060 | * or any address on the interface to use |
1061 | * as a dummy address in the rest of this function. | | 1061 | * as a dummy address in the rest of this function. |
1062 | * | | 1062 | * |
1063 | * If the target IP address is zero then try and find | | 1063 | * If the target IP address is zero then try and find |
1064 | * the sender address for DAD. | | 1064 | * the sender address for DAD. |
1065 | */ | | 1065 | */ |
1066 | myaddr = in_nullhost(itaddr) ? isaddr : itaddr; | | 1066 | myaddr = in_nullhost(itaddr) ? isaddr : itaddr; |
1067 | s = pserialize_read_enter(); | | 1067 | s = pserialize_read_enter(); |
1068 | IN_ADDRHASH_READER_FOREACH(ia, myaddr.s_addr) { | | 1068 | IN_ADDRHASH_READER_FOREACH(ia, myaddr.s_addr) { |
1069 | if (!in_hosteq(ia->ia_addr.sin_addr, myaddr)) | | 1069 | if (!in_hosteq(ia->ia_addr.sin_addr, myaddr)) |
1070 | continue; | | 1070 | continue; |
1071 | #if NCARP > 0 | | 1071 | #if NCARP > 0 |
1072 | if (ia->ia_ifp->if_type == IFT_CARP && | | 1072 | if (ia->ia_ifp->if_type == IFT_CARP && |
1073 | ((ia->ia_ifp->if_flags & (IFF_UP|IFF_RUNNING)) == | | 1073 | ((ia->ia_ifp->if_flags & (IFF_UP|IFF_RUNNING)) == |
1074 | (IFF_UP|IFF_RUNNING))) { | | 1074 | (IFF_UP|IFF_RUNNING))) { |
1075 | index++; | | 1075 | index++; |
1076 | /* XXX: ar_hln? */ | | 1076 | /* XXX: ar_hln? */ |
1077 | if (ia->ia_ifp == rcvif && (ah->ar_hln >= 6) && | | 1077 | if (ia->ia_ifp == rcvif && (ah->ar_hln >= 6) && |
1078 | carp_iamatch(ia, ar_sha(ah), | | 1078 | carp_iamatch(ia, ar_sha(ah), |
1079 | &count, index)) { | | 1079 | &count, index)) { |
1080 | break; | | 1080 | break; |
1081 | } | | 1081 | } |
1082 | } else | | 1082 | } else |
1083 | #endif | | 1083 | #endif |
1084 | if (ia->ia_ifp == rcvif) | | 1084 | if (ia->ia_ifp == rcvif) |
1085 | break; | | 1085 | break; |
1086 | #if NBRIDGE > 0 | | 1086 | #if NBRIDGE > 0 |
1087 | /* | | 1087 | /* |
1088 | * If the interface we received the packet on | | 1088 | * If the interface we received the packet on |
1089 | * is part of a bridge, check to see if we need | | 1089 | * is part of a bridge, check to see if we need |
1090 | * to "bridge" the packet to ourselves at this | | 1090 | * to "bridge" the packet to ourselves at this |
1091 | * layer. Note we still prefer a perfect match, | | 1091 | * layer. Note we still prefer a perfect match, |
1092 | * but allow this weaker match if necessary. | | 1092 | * but allow this weaker match if necessary. |
1093 | */ | | 1093 | */ |
1094 | if (rcvif->if_bridge != NULL && | | 1094 | if (rcvif->if_bridge != NULL && |
1095 | rcvif->if_bridge == ia->ia_ifp->if_bridge) | | 1095 | rcvif->if_bridge == ia->ia_ifp->if_bridge) |
1096 | bridge_ia = ia; | | 1096 | bridge_ia = ia; |
1097 | #endif | | 1097 | #endif |
1098 | } | | 1098 | } |
1099 | | | 1099 | |
1100 | #if NBRIDGE > 0 | | 1100 | #if NBRIDGE > 0 |
1101 | if (ia == NULL && bridge_ia != NULL) { | | 1101 | if (ia == NULL && bridge_ia != NULL) { |
1102 | ia = bridge_ia; | | 1102 | ia = bridge_ia; |
1103 | m_put_rcvif_psref(rcvif, &psref); | | 1103 | m_put_rcvif_psref(rcvif, &psref); |
1104 | rcvif = NULL; | | 1104 | rcvif = NULL; |
1105 | /* FIXME */ | | 1105 | /* FIXME */ |
1106 | ifp = bridge_ia->ia_ifp; | | 1106 | ifp = bridge_ia->ia_ifp; |
1107 | } | | 1107 | } |
1108 | #endif | | 1108 | #endif |
1109 | if (ia != NULL) | | 1109 | if (ia != NULL) |
1110 | ia4_acquire(ia, &psref_ia); | | 1110 | ia4_acquire(ia, &psref_ia); |
1111 | pserialize_read_exit(s); | | 1111 | pserialize_read_exit(s); |
1112 | | | 1112 | |
1113 | if (ah->ar_hln != ifp->if_addrlen) { | | 1113 | if (ah->ar_hln != ifp->if_addrlen) { |
1114 | ARP_STATINC(ARP_STAT_RCVBADLEN); | | 1114 | ARP_STATINC(ARP_STAT_RCVBADLEN); |
1115 | log(LOG_WARNING, | | 1115 | log(LOG_WARNING, |
1116 | "arp from %s: addr len: new %d, i/f %d (ignored)\n", | | 1116 | "arp from %s: addr len: new %d, i/f %d (ignored)\n", |
1117 | IN_PRINT(ipbuf, &isaddr), ah->ar_hln, ifp->if_addrlen); | | 1117 | IN_PRINT(ipbuf, &isaddr), ah->ar_hln, ifp->if_addrlen); |
1118 | goto out; | | 1118 | goto out; |
1119 | } | | 1119 | } |
1120 | | | 1120 | |
1121 | /* Only do DaD if we have a matching address. */ | | 1121 | /* Only do DaD if we have a matching address. */ |
1122 | do_dad = (ia != NULL); | | 1122 | do_dad = (ia != NULL); |
1123 | | | 1123 | |
1124 | if (ia == NULL) { | | 1124 | if (ia == NULL) { |
1125 | ia = in_get_ia_on_iface_psref(isaddr, rcvif, &psref_ia); | | 1125 | ia = in_get_ia_on_iface_psref(isaddr, rcvif, &psref_ia); |
1126 | if (ia == NULL) { | | 1126 | if (ia == NULL) { |
1127 | ia = in_get_ia_from_ifp_psref(ifp, &psref_ia); | | 1127 | ia = in_get_ia_from_ifp_psref(ifp, &psref_ia); |
1128 | if (ia == NULL) { | | 1128 | if (ia == NULL) { |
1129 | ARP_STATINC(ARP_STAT_RCVNOINT); | | 1129 | ARP_STATINC(ARP_STAT_RCVNOINT); |
1130 | goto out; | | 1130 | goto out; |
1131 | } | | 1131 | } |
1132 | } | | 1132 | } |
1133 | } | | 1133 | } |
1134 | | | 1134 | |
1135 | myaddr = ia->ia_addr.sin_addr; | | 1135 | myaddr = ia->ia_addr.sin_addr; |
1136 | | | 1136 | |
1137 | /* XXX checks for bridge case? */ | | 1137 | /* XXX checks for bridge case? */ |
1138 | if (!memcmp(ar_sha(ah), ifp->if_broadcastaddr, ifp->if_addrlen)) { | | 1138 | if (!memcmp(ar_sha(ah), ifp->if_broadcastaddr, ifp->if_addrlen)) { |
1139 | ARP_STATINC(ARP_STAT_RCVBCASTSHA); | | 1139 | ARP_STATINC(ARP_STAT_RCVBCASTSHA); |
1140 | log(LOG_ERR, | | 1140 | log(LOG_ERR, |
1141 | "%s: arp: link address is broadcast for IP address %s!\n", | | 1141 | "%s: arp: link address is broadcast for IP address %s!\n", |
1142 | ifp->if_xname, IN_PRINT(ipbuf, &isaddr)); | | 1142 | ifp->if_xname, IN_PRINT(ipbuf, &isaddr)); |
1143 | goto out; | | 1143 | goto out; |
1144 | } | | 1144 | } |
1145 | | | 1145 | |
1146 | /* | | 1146 | /* |
1147 | * If the source IP address is zero, this is an RFC 5227 ARP probe | | 1147 | * If the source IP address is zero, this is an RFC 5227 ARP probe |
1148 | */ | | 1148 | */ |
1149 | if (in_nullhost(isaddr)) | | 1149 | if (in_nullhost(isaddr)) |
1150 | ARP_STATINC(ARP_STAT_RCVZEROSPA); | | 1150 | ARP_STATINC(ARP_STAT_RCVZEROSPA); |
1151 | else if (in_hosteq(isaddr, myaddr)) | | 1151 | else if (in_hosteq(isaddr, myaddr)) |
1152 | ARP_STATINC(ARP_STAT_RCVLOCALSPA); | | 1152 | ARP_STATINC(ARP_STAT_RCVLOCALSPA); |
1153 | | | 1153 | |
1154 | if (in_nullhost(itaddr)) | | 1154 | if (in_nullhost(itaddr)) |
1155 | ARP_STATINC(ARP_STAT_RCVZEROTPA); | | 1155 | ARP_STATINC(ARP_STAT_RCVZEROTPA); |
1156 | | | 1156 | |
1157 | /* | | 1157 | /* |
1158 | * DAD check, RFC 5227. | | 1158 | * DAD check, RFC 5227. |
1159 | * Collision on sender address is always a duplicate. | | 1159 | * Collision on sender address is always a duplicate. |
1160 | * Collision on target address is only a duplicate IF | | 1160 | * Collision on target address is only a duplicate |
1161 | * the sender address is the null host (ie a DAD probe) AND | | 1161 | * IF the sender address is the null host (ie a DAD probe) |
1162 | * the message was broadcast - if it's unicast then it's | | 1162 | * AND the message was broadcast |
1163 | * a valid Unicast Poll from RFC 1122. | | 1163 | * AND our address is either tentative or duplicated |
| | | 1164 | * If it was unicast then it's a valid Unicast Poll from RFC 1122. |
1164 | */ | | 1165 | */ |
1165 | if (do_dad && | | 1166 | if (do_dad && |
1166 | (in_hosteq(isaddr, myaddr) || | | 1167 | (in_hosteq(isaddr, myaddr) || |
1167 | (in_nullhost(isaddr) && in_hosteq(itaddr, myaddr) && | | 1168 | (in_nullhost(isaddr) && in_hosteq(itaddr, myaddr) && |
1168 | m->m_flags & M_BCAST))) | | 1169 | m->m_flags & M_BCAST && |
| | | 1170 | ia->ia4_flags & (IN_IFF_TENTATIVE | IN_IFF_DUPLICATED)))) |
1169 | { | | 1171 | { |
1170 | struct sockaddr_dl sdl, *sdlp; | | 1172 | struct sockaddr_dl sdl, *sdlp; |
1171 | | | 1173 | |
1172 | sdlp = sockaddr_dl_init(&sdl, sizeof(sdl), | | 1174 | sdlp = sockaddr_dl_init(&sdl, sizeof(sdl), |
1173 | ifp->if_index, ifp->if_type, | | 1175 | ifp->if_index, ifp->if_type, |
1174 | NULL, 0, ar_sha(ah), ah->ar_hln); | | 1176 | NULL, 0, ar_sha(ah), ah->ar_hln); |
1175 | arp_dad_duplicated((struct ifaddr *)ia, sdlp); | | 1177 | arp_dad_duplicated((struct ifaddr *)ia, sdlp); |
1176 | goto out; | | 1178 | goto out; |
1177 | } | | 1179 | } |
1178 | | | 1180 | |
1179 | /* | | 1181 | /* |
1180 | * If the target IP address is zero, ignore the packet. | | 1182 | * If the target IP address is zero, ignore the packet. |
1181 | * This prevents the code below from trying to answer | | 1183 | * This prevents the code below from trying to answer |
1182 | * when we are using IP address zero (booting). | | 1184 | * when we are using IP address zero (booting). |
1183 | */ | | 1185 | */ |
1184 | if (in_nullhost(itaddr)) | | 1186 | if (in_nullhost(itaddr)) |
1185 | goto out; | | 1187 | goto out; |
1186 | | | 1188 | |
1187 | if (in_nullhost(isaddr)) | | 1189 | if (in_nullhost(isaddr)) |
1188 | goto reply; | | 1190 | goto reply; |
1189 | | | 1191 | |
1190 | if (in_hosteq(itaddr, myaddr)) | | 1192 | if (in_hosteq(itaddr, myaddr)) |
1191 | la = arpcreate(ifp, &isaddr, NULL, 1); | | 1193 | la = arpcreate(ifp, &isaddr, NULL, 1); |
1192 | else | | 1194 | else |
1193 | la = arplookup(ifp, &isaddr, NULL, 1); | | 1195 | la = arplookup(ifp, &isaddr, NULL, 1); |
1194 | if (la == NULL) | | 1196 | if (la == NULL) |
1195 | goto reply; | | 1197 | goto reply; |
1196 | | | 1198 | |
1197 | if ((la->la_flags & LLE_VALID) && | | 1199 | if ((la->la_flags & LLE_VALID) && |
1198 | memcmp(ar_sha(ah), &la->ll_addr, ifp->if_addrlen)) | | 1200 | memcmp(ar_sha(ah), &la->ll_addr, ifp->if_addrlen)) |
1199 | { | | 1201 | { |
1200 | char llabuf[LLA_ADDRSTRLEN], *llastr; | | 1202 | char llabuf[LLA_ADDRSTRLEN], *llastr; |
1201 | | | 1203 | |
1202 | llastr = lla_snprintf(llabuf, sizeof(llabuf), | | 1204 | llastr = lla_snprintf(llabuf, sizeof(llabuf), |
1203 | ar_sha(ah), ah->ar_hln); | | 1205 | ar_sha(ah), ah->ar_hln); |
1204 | | | 1206 | |
1205 | if (la->la_flags & LLE_STATIC) { | | 1207 | if (la->la_flags & LLE_STATIC) { |
1206 | ARP_STATINC(ARP_STAT_RCVOVERPERM); | | 1208 | ARP_STATINC(ARP_STAT_RCVOVERPERM); |
1207 | if (!log_permanent_modify) | | 1209 | if (!log_permanent_modify) |
1208 | goto out; | | 1210 | goto out; |
1209 | log(LOG_INFO, | | 1211 | log(LOG_INFO, |
1210 | "%s tried to overwrite permanent arp info" | | 1212 | "%s tried to overwrite permanent arp info" |
1211 | " for %s\n", llastr, IN_PRINT(ipbuf, &isaddr)); | | 1213 | " for %s\n", llastr, IN_PRINT(ipbuf, &isaddr)); |
1212 | goto out; | | 1214 | goto out; |
1213 | } else if (la->lle_tbl->llt_ifp != ifp) { | | 1215 | } else if (la->lle_tbl->llt_ifp != ifp) { |
1214 | /* XXX should not happen? */ | | 1216 | /* XXX should not happen? */ |
1215 | ARP_STATINC(ARP_STAT_RCVOVERINT); | | 1217 | ARP_STATINC(ARP_STAT_RCVOVERINT); |
1216 | if (!log_wrong_iface) | | 1218 | if (!log_wrong_iface) |
1217 | goto out; | | 1219 | goto out; |
1218 | log(LOG_INFO, | | 1220 | log(LOG_INFO, |
1219 | "%s on %s tried to overwrite " | | 1221 | "%s on %s tried to overwrite " |
1220 | "arp info for %s on %s\n", | | 1222 | "arp info for %s on %s\n", |
1221 | llastr, | | 1223 | llastr, |
1222 | ifp->if_xname, IN_PRINT(ipbuf, &isaddr), | | 1224 | ifp->if_xname, IN_PRINT(ipbuf, &isaddr), |
1223 | la->lle_tbl->llt_ifp->if_xname); | | 1225 | la->lle_tbl->llt_ifp->if_xname); |
1224 | goto out; | | 1226 | goto out; |
1225 | } else { | | 1227 | } else { |
1226 | ARP_STATINC(ARP_STAT_RCVOVER); | | 1228 | ARP_STATINC(ARP_STAT_RCVOVER); |
1227 | if (log_movements) | | 1229 | if (log_movements) |
1228 | log(LOG_INFO, "arp info overwritten " | | 1230 | log(LOG_INFO, "arp info overwritten " |
1229 | "for %s by %s\n", | | 1231 | "for %s by %s\n", |
1230 | IN_PRINT(ipbuf, &isaddr), llastr); | | 1232 | IN_PRINT(ipbuf, &isaddr), llastr); |
1231 | } | | 1233 | } |
1232 | rt_cmd = RTM_CHANGE; | | 1234 | rt_cmd = RTM_CHANGE; |
1233 | } else | | 1235 | } else |
1234 | rt_cmd = la->la_flags & LLE_VALID ? 0 : RTM_ADD; | | 1236 | rt_cmd = la->la_flags & LLE_VALID ? 0 : RTM_ADD; |
1235 | | | 1237 | |
1236 | KASSERT(ifp->if_sadl->sdl_alen == ifp->if_addrlen); | | 1238 | KASSERT(ifp->if_sadl->sdl_alen == ifp->if_addrlen); |
1237 | | | 1239 | |
1238 | #if NTOKEN > 0 | | 1240 | #if NTOKEN > 0 |
1239 | /* | | 1241 | /* |
1240 | * XXX uses m_data and assumes the complete answer including | | 1242 | * XXX uses m_data and assumes the complete answer including |
1241 | * XXX token-ring headers is in the same buf | | 1243 | * XXX token-ring headers is in the same buf |
1242 | */ | | 1244 | */ |
1243 | if (ifp->if_type == IFT_ISO88025) { | | 1245 | if (ifp->if_type == IFT_ISO88025) { |
1244 | struct token_header *trh; | | 1246 | struct token_header *trh; |
1245 | | | 1247 | |
1246 | trh = (struct token_header *)M_TRHSTART(m); | | 1248 | trh = (struct token_header *)M_TRHSTART(m); |
1247 | if (trh->token_shost[0] & TOKEN_RI_PRESENT) { | | 1249 | if (trh->token_shost[0] & TOKEN_RI_PRESENT) { |
1248 | struct token_rif *rif; | | 1250 | struct token_rif *rif; |
1249 | size_t riflen; | | 1251 | size_t riflen; |
1250 | | | 1252 | |
1251 | rif = TOKEN_RIF(trh); | | 1253 | rif = TOKEN_RIF(trh); |
1252 | riflen = (ntohs(rif->tr_rcf) & | | 1254 | riflen = (ntohs(rif->tr_rcf) & |
1253 | TOKEN_RCF_LEN_MASK) >> 8; | | 1255 | TOKEN_RCF_LEN_MASK) >> 8; |
1254 | | | 1256 | |
1255 | if (riflen > 2 && | | 1257 | if (riflen > 2 && |
1256 | riflen < sizeof(struct token_rif) && | | 1258 | riflen < sizeof(struct token_rif) && |
1257 | (riflen & 1) == 0) { | | 1259 | (riflen & 1) == 0) { |
1258 | rif->tr_rcf ^= htons(TOKEN_RCF_DIRECTION); | | 1260 | rif->tr_rcf ^= htons(TOKEN_RCF_DIRECTION); |
1259 | rif->tr_rcf &= htons(~TOKEN_RCF_BROADCAST_MASK); | | 1261 | rif->tr_rcf &= htons(~TOKEN_RCF_BROADCAST_MASK); |
1260 | memcpy(TOKEN_RIF_LLE(la), rif, riflen); | | 1262 | memcpy(TOKEN_RIF_LLE(la), rif, riflen); |
1261 | } | | 1263 | } |
1262 | } | | 1264 | } |
1263 | } | | 1265 | } |
1264 | #endif | | 1266 | #endif |
1265 | | | 1267 | |
1266 | KASSERT(sizeof(la->ll_addr) >= ifp->if_addrlen); | | 1268 | KASSERT(sizeof(la->ll_addr) >= ifp->if_addrlen); |
1267 | memcpy(&la->ll_addr, ar_sha(ah), ifp->if_addrlen); | | 1269 | memcpy(&la->ll_addr, ar_sha(ah), ifp->if_addrlen); |
1268 | la->la_flags |= LLE_VALID; | | 1270 | la->la_flags |= LLE_VALID; |
1269 | if ((la->la_flags & LLE_STATIC) == 0) { | | 1271 | if ((la->la_flags & LLE_STATIC) == 0) { |
1270 | la->la_expire = time_uptime + arpt_keep; | | 1272 | la->la_expire = time_uptime + arpt_keep; |
1271 | arp_settimer(la, arpt_keep); | | 1273 | arp_settimer(la, arpt_keep); |
1272 | } | | 1274 | } |
1273 | la->la_asked = 0; | | 1275 | la->la_asked = 0; |
1274 | /* rt->rt_flags &= ~RTF_REJECT; */ | | 1276 | /* rt->rt_flags &= ~RTF_REJECT; */ |
1275 | | | 1277 | |
1276 | if (rt_cmd != 0) { | | 1278 | if (rt_cmd != 0) { |
1277 | struct sockaddr_in sin; | | 1279 | struct sockaddr_in sin; |
1278 | | | 1280 | |
1279 | sockaddr_in_init(&sin, &la->r_l3addr.addr4, 0); | | 1281 | sockaddr_in_init(&sin, &la->r_l3addr.addr4, 0); |
1280 | rt_clonedmsg(rt_cmd, sintosa(&sin), ar_sha(ah), ifp); | | 1282 | rt_clonedmsg(rt_cmd, sintosa(&sin), ar_sha(ah), ifp); |
1281 | } | | 1283 | } |
1282 | | | 1284 | |
1283 | if (la->la_hold != NULL) { | | 1285 | if (la->la_hold != NULL) { |
1284 | int n = la->la_numheld; | | 1286 | int n = la->la_numheld; |
1285 | struct mbuf *m_hold, *m_hold_next; | | 1287 | struct mbuf *m_hold, *m_hold_next; |
1286 | struct sockaddr_in sin; | | 1288 | struct sockaddr_in sin; |
1287 | | | 1289 | |
1288 | sockaddr_in_init(&sin, &la->r_l3addr.addr4, 0); | | 1290 | sockaddr_in_init(&sin, &la->r_l3addr.addr4, 0); |
1289 | | | 1291 | |
1290 | m_hold = la->la_hold; | | 1292 | m_hold = la->la_hold; |
1291 | la->la_hold = NULL; | | 1293 | la->la_hold = NULL; |
1292 | la->la_numheld = 0; | | 1294 | la->la_numheld = 0; |
1293 | /* | | 1295 | /* |
1294 | * We have to unlock here because if_output would call | | 1296 | * We have to unlock here because if_output would call |
1295 | * arpresolve | | 1297 | * arpresolve |
1296 | */ | | 1298 | */ |
1297 | LLE_WUNLOCK(la); | | 1299 | LLE_WUNLOCK(la); |
1298 | ARP_STATADD(ARP_STAT_DFRSENT, n); | | 1300 | ARP_STATADD(ARP_STAT_DFRSENT, n); |
1299 | ARP_STATADD(ARP_STAT_DFRTOTAL, n); | | 1301 | ARP_STATADD(ARP_STAT_DFRTOTAL, n); |
1300 | for (; m_hold != NULL; m_hold = m_hold_next) { | | 1302 | for (; m_hold != NULL; m_hold = m_hold_next) { |
1301 | m_hold_next = m_hold->m_nextpkt; | | 1303 | m_hold_next = m_hold->m_nextpkt; |
1302 | m_hold->m_nextpkt = NULL; | | 1304 | m_hold->m_nextpkt = NULL; |
1303 | if_output_lock(ifp, ifp, m_hold, sintosa(&sin), NULL); | | 1305 | if_output_lock(ifp, ifp, m_hold, sintosa(&sin), NULL); |
1304 | } | | 1306 | } |
1305 | } else | | 1307 | } else |
1306 | LLE_WUNLOCK(la); | | 1308 | LLE_WUNLOCK(la); |
1307 | la = NULL; | | 1309 | la = NULL; |
1308 | | | 1310 | |
1309 | reply: | | 1311 | reply: |
1310 | if (la != NULL) { | | 1312 | if (la != NULL) { |
1311 | LLE_WUNLOCK(la); | | 1313 | LLE_WUNLOCK(la); |
1312 | la = NULL; | | 1314 | la = NULL; |
1313 | } | | 1315 | } |
1314 | if (op != ARPOP_REQUEST) { | | 1316 | if (op != ARPOP_REQUEST) { |
1315 | if (op == ARPOP_REPLY) | | 1317 | if (op == ARPOP_REPLY) |
1316 | ARP_STATINC(ARP_STAT_RCVREPLY); | | 1318 | ARP_STATINC(ARP_STAT_RCVREPLY); |
1317 | goto out; | | 1319 | goto out; |
1318 | } | | 1320 | } |
1319 | ARP_STATINC(ARP_STAT_RCVREQUEST); | | 1321 | ARP_STATINC(ARP_STAT_RCVREQUEST); |
1320 | if (in_hosteq(itaddr, myaddr)) { | | 1322 | if (in_hosteq(itaddr, myaddr)) { |
1321 | /* If our address is unusable, don't reply */ | | 1323 | /* If our address is unusable, don't reply */ |
1322 | if (ia->ia4_flags & (IN_IFF_NOTREADY | IN_IFF_DETACHED)) | | 1324 | if (ia->ia4_flags & (IN_IFF_NOTREADY | IN_IFF_DETACHED)) |
1323 | goto out; | | 1325 | goto out; |
1324 | /* I am the target */ | | 1326 | /* I am the target */ |
1325 | tha = ar_tha(ah); | | 1327 | tha = ar_tha(ah); |
1326 | if (tha) | | 1328 | if (tha) |
1327 | memcpy(tha, ar_sha(ah), ah->ar_hln); | | 1329 | memcpy(tha, ar_sha(ah), ah->ar_hln); |
1328 | memcpy(ar_sha(ah), CLLADDR(ifp->if_sadl), ah->ar_hln); | | 1330 | memcpy(ar_sha(ah), CLLADDR(ifp->if_sadl), ah->ar_hln); |
1329 | } else { | | 1331 | } else { |
1330 | /* Proxy ARP */ | | 1332 | /* Proxy ARP */ |
1331 | struct llentry *lle = NULL; | | 1333 | struct llentry *lle = NULL; |
1332 | struct sockaddr_in sin; | | 1334 | struct sockaddr_in sin; |
1333 | | | 1335 | |
1334 | #if NCARP > 0 | | 1336 | #if NCARP > 0 |
1335 | if (ifp->if_type == IFT_CARP) { | | 1337 | if (ifp->if_type == IFT_CARP) { |
1336 | struct ifnet *_rcvif = m_get_rcvif(m, &s); | | 1338 | struct ifnet *_rcvif = m_get_rcvif(m, &s); |
1337 | int iftype = 0; | | 1339 | int iftype = 0; |
1338 | if (__predict_true(_rcvif != NULL)) | | 1340 | if (__predict_true(_rcvif != NULL)) |
1339 | iftype = _rcvif->if_type; | | 1341 | iftype = _rcvif->if_type; |
1340 | m_put_rcvif(_rcvif, &s); | | 1342 | m_put_rcvif(_rcvif, &s); |
1341 | if (iftype != IFT_CARP) | | 1343 | if (iftype != IFT_CARP) |
1342 | goto out; | | 1344 | goto out; |
1343 | } | | 1345 | } |
1344 | #endif | | 1346 | #endif |
1345 | | | 1347 | |
1346 | tha = ar_tha(ah); | | 1348 | tha = ar_tha(ah); |
1347 | | | 1349 | |
1348 | sockaddr_in_init(&sin, &itaddr, 0); | | 1350 | sockaddr_in_init(&sin, &itaddr, 0); |
1349 | | | 1351 | |
1350 | IF_AFDATA_RLOCK(ifp); | | 1352 | IF_AFDATA_RLOCK(ifp); |
1351 | lle = lla_lookup(LLTABLE(ifp), 0, (struct sockaddr *)&sin); | | 1353 | lle = lla_lookup(LLTABLE(ifp), 0, (struct sockaddr *)&sin); |
1352 | IF_AFDATA_RUNLOCK(ifp); | | 1354 | IF_AFDATA_RUNLOCK(ifp); |
1353 | | | 1355 | |
1354 | if ((lle != NULL) && (lle->la_flags & LLE_PUB)) { | | 1356 | if ((lle != NULL) && (lle->la_flags & LLE_PUB)) { |
1355 | if (tha) | | 1357 | if (tha) |
1356 | memcpy(tha, ar_sha(ah), ah->ar_hln); | | 1358 | memcpy(tha, ar_sha(ah), ah->ar_hln); |
1357 | memcpy(ar_sha(ah), &lle->ll_addr, ah->ar_hln); | | 1359 | memcpy(ar_sha(ah), &lle->ll_addr, ah->ar_hln); |
1358 | LLE_RUNLOCK(lle); | | 1360 | LLE_RUNLOCK(lle); |
1359 | } else { | | 1361 | } else { |
1360 | if (lle != NULL) | | 1362 | if (lle != NULL) |
1361 | LLE_RUNLOCK(lle); | | 1363 | LLE_RUNLOCK(lle); |
1362 | goto out; | | 1364 | goto out; |
1363 | } | | 1365 | } |
1364 | } | | 1366 | } |
1365 | ia4_release(ia, &psref_ia); | | 1367 | ia4_release(ia, &psref_ia); |
1366 | | | 1368 | |
1367 | /* | | 1369 | /* |
1368 | * XXX XXX: Here we're recycling the mbuf. But the mbuf could have | | 1370 | * XXX XXX: Here we're recycling the mbuf. But the mbuf could have |
1369 | * other mbufs in its chain, and just overwriting m->m_pkthdr.len | | 1371 | * other mbufs in its chain, and just overwriting m->m_pkthdr.len |
1370 | * would be wrong in this case (the length becomes smaller than the | | 1372 | * would be wrong in this case (the length becomes smaller than the |
1371 | * real chain size). | | 1373 | * real chain size). |
1372 | * | | 1374 | * |
1373 | * This can theoretically cause bugs in the lower layers (drivers, | | 1375 | * This can theoretically cause bugs in the lower layers (drivers, |
1374 | * and L2encap), in some corner cases. | | 1376 | * and L2encap), in some corner cases. |
1375 | */ | | 1377 | */ |
1376 | memcpy(ar_tpa(ah), ar_spa(ah), ah->ar_pln); | | 1378 | memcpy(ar_tpa(ah), ar_spa(ah), ah->ar_pln); |
1377 | memcpy(ar_spa(ah), &itaddr, ah->ar_pln); | | 1379 | memcpy(ar_spa(ah), &itaddr, ah->ar_pln); |
1378 | ah->ar_op = htons(ARPOP_REPLY); | | 1380 | ah->ar_op = htons(ARPOP_REPLY); |
1379 | ah->ar_pro = htons(ETHERTYPE_IP); /* let's be sure! */ | | 1381 | ah->ar_pro = htons(ETHERTYPE_IP); /* let's be sure! */ |
1380 | switch (ifp->if_type) { | | 1382 | switch (ifp->if_type) { |
1381 | case IFT_IEEE1394: | | 1383 | case IFT_IEEE1394: |
1382 | /* ieee1394 arp reply is broadcast */ | | 1384 | /* ieee1394 arp reply is broadcast */ |
1383 | m->m_flags &= ~M_MCAST; | | 1385 | m->m_flags &= ~M_MCAST; |
1384 | m->m_flags |= M_BCAST; | | 1386 | m->m_flags |= M_BCAST; |
1385 | m->m_len = sizeof(*ah) + (2 * ah->ar_pln) + ah->ar_hln; | | 1387 | m->m_len = sizeof(*ah) + (2 * ah->ar_pln) + ah->ar_hln; |
1386 | break; | | 1388 | break; |
1387 | default: | | 1389 | default: |
1388 | m->m_flags &= ~(M_BCAST|M_MCAST); /* never reply by broadcast */ | | 1390 | m->m_flags &= ~(M_BCAST|M_MCAST); /* never reply by broadcast */ |
1389 | m->m_len = sizeof(*ah) + (2 * ah->ar_pln) + (2 * ah->ar_hln); | | 1391 | m->m_len = sizeof(*ah) + (2 * ah->ar_pln) + (2 * ah->ar_hln); |
1390 | break; | | 1392 | break; |
1391 | } | | 1393 | } |
1392 | m->m_pkthdr.len = m->m_len; | | 1394 | m->m_pkthdr.len = m->m_len; |
1393 | sa.sa_family = AF_ARP; | | 1395 | sa.sa_family = AF_ARP; |
1394 | sa.sa_len = 2; | | 1396 | sa.sa_len = 2; |
1395 | arps = ARP_STAT_GETREF(); | | 1397 | arps = ARP_STAT_GETREF(); |
1396 | arps[ARP_STAT_SNDTOTAL]++; | | 1398 | arps[ARP_STAT_SNDTOTAL]++; |
1397 | arps[ARP_STAT_SNDREPLY]++; | | 1399 | arps[ARP_STAT_SNDREPLY]++; |
1398 | ARP_STAT_PUTREF(); | | 1400 | ARP_STAT_PUTREF(); |
1399 | if_output_lock(ifp, ifp, m, &sa, NULL); | | 1401 | if_output_lock(ifp, ifp, m, &sa, NULL); |
1400 | if (rcvif != NULL) | | 1402 | if (rcvif != NULL) |
1401 | m_put_rcvif_psref(rcvif, &psref); | | 1403 | m_put_rcvif_psref(rcvif, &psref); |
1402 | return; | | 1404 | return; |
1403 | | | 1405 | |
1404 | out: | | 1406 | out: |
1405 | if (la != NULL) | | 1407 | if (la != NULL) |
1406 | LLE_WUNLOCK(la); | | 1408 | LLE_WUNLOCK(la); |
1407 | if (ia != NULL) | | 1409 | if (ia != NULL) |
1408 | ia4_release(ia, &psref_ia); | | 1410 | ia4_release(ia, &psref_ia); |
1409 | if (rcvif != NULL) | | 1411 | if (rcvif != NULL) |
1410 | m_put_rcvif_psref(rcvif, &psref); | | 1412 | m_put_rcvif_psref(rcvif, &psref); |
1411 | m_freem(m); | | 1413 | m_freem(m); |
1412 | } | | 1414 | } |
1413 | | | 1415 | |
1414 | /* | | 1416 | /* |
1415 | * Lookup or a new address in arptab. | | 1417 | * Lookup or a new address in arptab. |
1416 | */ | | 1418 | */ |
1417 | static struct llentry * | | 1419 | static struct llentry * |
1418 | arplookup(struct ifnet *ifp, const struct in_addr *addr, | | 1420 | arplookup(struct ifnet *ifp, const struct in_addr *addr, |
1419 | const struct sockaddr *sa, int wlock) | | 1421 | const struct sockaddr *sa, int wlock) |
1420 | { | | 1422 | { |
1421 | struct sockaddr_in sin; | | 1423 | struct sockaddr_in sin; |
1422 | struct llentry *la; | | 1424 | struct llentry *la; |
1423 | int flags = wlock ? LLE_EXCLUSIVE : 0; | | 1425 | int flags = wlock ? LLE_EXCLUSIVE : 0; |
1424 | | | 1426 | |
1425 | if (sa == NULL) { | | 1427 | if (sa == NULL) { |
1426 | KASSERT(addr != NULL); | | 1428 | KASSERT(addr != NULL); |
1427 | sockaddr_in_init(&sin, addr, 0); | | 1429 | sockaddr_in_init(&sin, addr, 0); |
1428 | sa = sintocsa(&sin); | | 1430 | sa = sintocsa(&sin); |
1429 | } | | 1431 | } |
1430 | | | 1432 | |
1431 | IF_AFDATA_RLOCK(ifp); | | 1433 | IF_AFDATA_RLOCK(ifp); |
1432 | la = lla_lookup(LLTABLE(ifp), flags, sa); | | 1434 | la = lla_lookup(LLTABLE(ifp), flags, sa); |
1433 | IF_AFDATA_RUNLOCK(ifp); | | 1435 | IF_AFDATA_RUNLOCK(ifp); |
1434 | | | 1436 | |
1435 | return la; | | 1437 | return la; |
1436 | } | | 1438 | } |
1437 | | | 1439 | |
1438 | static struct llentry * | | 1440 | static struct llentry * |
1439 | arpcreate(struct ifnet *ifp, const struct in_addr *addr, | | 1441 | arpcreate(struct ifnet *ifp, const struct in_addr *addr, |
1440 | const struct sockaddr *sa, int wlock) | | 1442 | const struct sockaddr *sa, int wlock) |
1441 | { | | 1443 | { |
1442 | struct sockaddr_in sin; | | 1444 | struct sockaddr_in sin; |
1443 | struct llentry *la; | | 1445 | struct llentry *la; |
1444 | int flags = wlock ? LLE_EXCLUSIVE : 0; | | 1446 | int flags = wlock ? LLE_EXCLUSIVE : 0; |
1445 | | | 1447 | |
1446 | if (sa == NULL) { | | 1448 | if (sa == NULL) { |
1447 | KASSERT(addr != NULL); | | 1449 | KASSERT(addr != NULL); |
1448 | sockaddr_in_init(&sin, addr, 0); | | 1450 | sockaddr_in_init(&sin, addr, 0); |
1449 | sa = sintocsa(&sin); | | 1451 | sa = sintocsa(&sin); |
1450 | } | | 1452 | } |
1451 | | | 1453 | |
1452 | la = arplookup(ifp, addr, sa, wlock); | | 1454 | la = arplookup(ifp, addr, sa, wlock); |
1453 | | | 1455 | |
1454 | if (la == NULL) { | | 1456 | if (la == NULL) { |
1455 | struct rtentry *rt; | | 1457 | struct rtentry *rt; |
1456 | | | 1458 | |
1457 | rt = rtalloc1(sa, 0); | | 1459 | rt = rtalloc1(sa, 0); |
1458 | IF_AFDATA_WLOCK(ifp); | | 1460 | IF_AFDATA_WLOCK(ifp); |
1459 | la = lla_create(LLTABLE(ifp), flags, sa, rt); | | 1461 | la = lla_create(LLTABLE(ifp), flags, sa, rt); |
1460 | IF_AFDATA_WUNLOCK(ifp); | | 1462 | IF_AFDATA_WUNLOCK(ifp); |
1461 | if (rt != NULL) | | 1463 | if (rt != NULL) |
1462 | rt_unref(rt); | | 1464 | rt_unref(rt); |
1463 | | | 1465 | |
1464 | if (la != NULL) | | 1466 | if (la != NULL) |
1465 | arp_init_llentry(ifp, la); | | 1467 | arp_init_llentry(ifp, la); |
1466 | } | | 1468 | } |
1467 | | | 1469 | |
1468 | return la; | | 1470 | return la; |
1469 | } | | 1471 | } |
1470 | | | 1472 | |
1471 | int | | 1473 | int |
1472 | arpioctl(u_long cmd, void *data) | | 1474 | arpioctl(u_long cmd, void *data) |
1473 | { | | 1475 | { |
1474 | | | 1476 | |
1475 | return EOPNOTSUPP; | | 1477 | return EOPNOTSUPP; |
1476 | } | | 1478 | } |
1477 | | | 1479 | |
1478 | void | | 1480 | void |
1479 | arp_ifinit(struct ifnet *ifp, struct ifaddr *ifa) | | 1481 | arp_ifinit(struct ifnet *ifp, struct ifaddr *ifa) |
1480 | { | | 1482 | { |
1481 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; | | 1483 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; |
1482 | | | 1484 | |
1483 | ifa->ifa_rtrequest = arp_rtrequest; | | 1485 | ifa->ifa_rtrequest = arp_rtrequest; |
1484 | ifa->ifa_flags |= RTF_CONNECTED; | | 1486 | ifa->ifa_flags |= RTF_CONNECTED; |
1485 | | | 1487 | |
1486 | /* ARP will handle DAD for this address. */ | | 1488 | /* ARP will handle DAD for this address. */ |
1487 | if (in_nullhost(IA_SIN(ifa)->sin_addr)) { | | 1489 | if (in_nullhost(IA_SIN(ifa)->sin_addr)) { |
1488 | if (ia->ia_dad_stop != NULL) /* safety */ | | 1490 | if (ia->ia_dad_stop != NULL) /* safety */ |
1489 | ia->ia_dad_stop(ifa); | | 1491 | ia->ia_dad_stop(ifa); |
1490 | ia->ia_dad_start = NULL; | | 1492 | ia->ia_dad_start = NULL; |
1491 | ia->ia_dad_stop = NULL; | | 1493 | ia->ia_dad_stop = NULL; |
1492 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; | | 1494 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; |
1493 | } else { | | 1495 | } else { |
1494 | ia->ia_dad_start = arp_dad_start; | | 1496 | ia->ia_dad_start = arp_dad_start; |
1495 | ia->ia_dad_stop = arp_dad_stop; | | 1497 | ia->ia_dad_stop = arp_dad_stop; |
1496 | if (ia->ia4_flags & IN_IFF_TRYTENTATIVE && ip_dad_enabled()) | | 1498 | if (ia->ia4_flags & IN_IFF_TRYTENTATIVE && ip_dad_enabled()) |
1497 | ia->ia4_flags |= IN_IFF_TENTATIVE; | | 1499 | ia->ia4_flags |= IN_IFF_TENTATIVE; |
1498 | else | | 1500 | else |
1499 | arpannounce1(ifa); | | 1501 | arpannounce1(ifa); |
1500 | } | | 1502 | } |
1501 | } | | 1503 | } |
1502 | | | 1504 | |
1503 | TAILQ_HEAD(dadq_head, dadq); | | 1505 | TAILQ_HEAD(dadq_head, dadq); |
1504 | struct dadq { | | 1506 | struct dadq { |
1505 | TAILQ_ENTRY(dadq) dad_list; | | 1507 | TAILQ_ENTRY(dadq) dad_list; |
1506 | struct ifaddr *dad_ifa; | | 1508 | struct ifaddr *dad_ifa; |
1507 | int dad_count; /* max ARP to send */ | | 1509 | int dad_count; /* max ARP to send */ |
1508 | int dad_arp_tcount; /* # of trials to send ARP */ | | 1510 | int dad_arp_tcount; /* # of trials to send ARP */ |
1509 | int dad_arp_ocount; /* ARP sent so far */ | | 1511 | int dad_arp_ocount; /* ARP sent so far */ |
1510 | int dad_arp_announce; /* max ARP announcements */ | | 1512 | int dad_arp_announce; /* max ARP announcements */ |
1511 | int dad_arp_acount; /* # of announcements */ | | 1513 | int dad_arp_acount; /* # of announcements */ |
1512 | struct callout dad_timer_ch; | | 1514 | struct callout dad_timer_ch; |
1513 | }; | | 1515 | }; |
1514 | | | 1516 | |
1515 | static struct dadq_head dadq; | | 1517 | static struct dadq_head dadq; |
1516 | static int dad_maxtry = 15; /* max # of *tries* to transmit DAD packet */ | | 1518 | static int dad_maxtry = 15; /* max # of *tries* to transmit DAD packet */ |
1517 | static kmutex_t arp_dad_lock; | | 1519 | static kmutex_t arp_dad_lock; |
1518 | | | 1520 | |
1519 | static void | | 1521 | static void |
1520 | arp_dad_init(void) | | 1522 | arp_dad_init(void) |
1521 | { | | 1523 | { |
1522 | | | 1524 | |
1523 | TAILQ_INIT(&dadq); | | 1525 | TAILQ_INIT(&dadq); |
1524 | mutex_init(&arp_dad_lock, MUTEX_DEFAULT, IPL_NONE); | | 1526 | mutex_init(&arp_dad_lock, MUTEX_DEFAULT, IPL_NONE); |
1525 | } | | 1527 | } |
1526 | | | 1528 | |
1527 | static struct dadq * | | 1529 | static struct dadq * |
1528 | arp_dad_find(struct ifaddr *ifa) | | 1530 | arp_dad_find(struct ifaddr *ifa) |
1529 | { | | 1531 | { |
1530 | struct dadq *dp; | | 1532 | struct dadq *dp; |
1531 | | | 1533 | |
1532 | KASSERT(mutex_owned(&arp_dad_lock)); | | 1534 | KASSERT(mutex_owned(&arp_dad_lock)); |
1533 | | | 1535 | |
1534 | TAILQ_FOREACH(dp, &dadq, dad_list) { | | 1536 | TAILQ_FOREACH(dp, &dadq, dad_list) { |
1535 | if (dp->dad_ifa == ifa) | | 1537 | if (dp->dad_ifa == ifa) |
1536 | return dp; | | 1538 | return dp; |
1537 | } | | 1539 | } |
1538 | return NULL; | | 1540 | return NULL; |
1539 | } | | 1541 | } |
1540 | | | 1542 | |
1541 | static void | | 1543 | static void |
1542 | arp_dad_starttimer(struct dadq *dp, int ticks) | | 1544 | arp_dad_starttimer(struct dadq *dp, int ticks) |
1543 | { | | 1545 | { |
1544 | | | 1546 | |
1545 | callout_reset(&dp->dad_timer_ch, ticks, | | 1547 | callout_reset(&dp->dad_timer_ch, ticks, |
1546 | (void (*)(void *))arp_dad_timer, dp); | | 1548 | (void (*)(void *))arp_dad_timer, dp); |
1547 | } | | 1549 | } |
1548 | | | 1550 | |
1549 | static void | | 1551 | static void |
1550 | arp_dad_stoptimer(struct dadq *dp) | | 1552 | arp_dad_stoptimer(struct dadq *dp) |
1551 | { | | 1553 | { |
1552 | | | 1554 | |
1553 | KASSERT(mutex_owned(&arp_dad_lock)); | | 1555 | KASSERT(mutex_owned(&arp_dad_lock)); |
1554 | | | 1556 | |
1555 | TAILQ_REMOVE(&dadq, dp, dad_list); | | 1557 | TAILQ_REMOVE(&dadq, dp, dad_list); |
1556 | /* Tell the timer that dp is being destroyed. */ | | 1558 | /* Tell the timer that dp is being destroyed. */ |
1557 | dp->dad_ifa = NULL; | | 1559 | dp->dad_ifa = NULL; |
1558 | callout_halt(&dp->dad_timer_ch, &arp_dad_lock); | | 1560 | callout_halt(&dp->dad_timer_ch, &arp_dad_lock); |
1559 | } | | 1561 | } |
1560 | | | 1562 | |
1561 | static void | | 1563 | static void |
1562 | arp_dad_destroytimer(struct dadq *dp) | | 1564 | arp_dad_destroytimer(struct dadq *dp) |
1563 | { | | 1565 | { |
1564 | | | 1566 | |
1565 | callout_destroy(&dp->dad_timer_ch); | | 1567 | callout_destroy(&dp->dad_timer_ch); |
1566 | KASSERT(dp->dad_ifa == NULL); | | 1568 | KASSERT(dp->dad_ifa == NULL); |
1567 | kmem_intr_free(dp, sizeof(*dp)); | | 1569 | kmem_intr_free(dp, sizeof(*dp)); |
1568 | } | | 1570 | } |
1569 | | | 1571 | |
1570 | static void | | 1572 | static void |
1571 | arp_dad_output(struct dadq *dp, struct ifaddr *ifa) | | 1573 | arp_dad_output(struct dadq *dp, struct ifaddr *ifa) |
1572 | { | | 1574 | { |
1573 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; | | 1575 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; |
1574 | struct ifnet *ifp = ifa->ifa_ifp; | | 1576 | struct ifnet *ifp = ifa->ifa_ifp; |
1575 | struct in_addr sip; | | 1577 | struct in_addr sip; |
1576 | | | 1578 | |
1577 | dp->dad_arp_tcount++; | | 1579 | dp->dad_arp_tcount++; |
1578 | if ((ifp->if_flags & IFF_UP) == 0) | | 1580 | if ((ifp->if_flags & IFF_UP) == 0) |
1579 | return; | | 1581 | return; |
1580 | if ((ifp->if_flags & IFF_RUNNING) == 0) | | 1582 | if ((ifp->if_flags & IFF_RUNNING) == 0) |
1581 | return; | | 1583 | return; |
1582 | | | 1584 | |
1583 | dp->dad_arp_tcount = 0; | | 1585 | dp->dad_arp_tcount = 0; |
1584 | dp->dad_arp_ocount++; | | 1586 | dp->dad_arp_ocount++; |
1585 | | | 1587 | |
1586 | memset(&sip, 0, sizeof(sip)); | | 1588 | memset(&sip, 0, sizeof(sip)); |
1587 | arprequest(ifa->ifa_ifp, &sip, &ia->ia_addr.sin_addr, | | 1589 | arprequest(ifa->ifa_ifp, &sip, &ia->ia_addr.sin_addr, |
1588 | CLLADDR(ifa->ifa_ifp->if_sadl)); | | 1590 | CLLADDR(ifa->ifa_ifp->if_sadl)); |
1589 | } | | 1591 | } |
1590 | | | 1592 | |
1591 | /* | | 1593 | /* |
1592 | * Start Duplicate Address Detection (DAD) for specified interface address. | | 1594 | * Start Duplicate Address Detection (DAD) for specified interface address. |
1593 | */ | | 1595 | */ |
1594 | static void | | 1596 | static void |
1595 | arp_dad_start(struct ifaddr *ifa) | | 1597 | arp_dad_start(struct ifaddr *ifa) |
1596 | { | | 1598 | { |
1597 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; | | 1599 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; |
1598 | struct dadq *dp; | | 1600 | struct dadq *dp; |
1599 | char ipbuf[INET_ADDRSTRLEN]; | | 1601 | char ipbuf[INET_ADDRSTRLEN]; |
1600 | | | 1602 | |
1601 | /* | | 1603 | /* |
1602 | * If we don't need DAD, don't do it. | | 1604 | * If we don't need DAD, don't do it. |
1603 | * - DAD is disabled | | 1605 | * - DAD is disabled |
1604 | */ | | 1606 | */ |
1605 | if (!(ia->ia4_flags & IN_IFF_TENTATIVE)) { | | 1607 | if (!(ia->ia4_flags & IN_IFF_TENTATIVE)) { |
1606 | log(LOG_DEBUG, | | 1608 | log(LOG_DEBUG, |
1607 | "%s: called with non-tentative address %s(%s)\n", __func__, | | 1609 | "%s: called with non-tentative address %s(%s)\n", __func__, |
1608 | IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), | | 1610 | IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), |
1609 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); | | 1611 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); |
1610 | return; | | 1612 | return; |
1611 | } | | 1613 | } |
1612 | if (!ip_dad_enabled()) { | | 1614 | if (!ip_dad_enabled()) { |
1613 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; | | 1615 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; |
1614 | rt_addrmsg(RTM_NEWADDR, ifa); | | 1616 | rt_addrmsg(RTM_NEWADDR, ifa); |
1615 | arpannounce1(ifa); | | 1617 | arpannounce1(ifa); |
1616 | return; | | 1618 | return; |
1617 | } | | 1619 | } |
1618 | KASSERT(ifa->ifa_ifp != NULL); | | 1620 | KASSERT(ifa->ifa_ifp != NULL); |
1619 | if (!(ifa->ifa_ifp->if_flags & IFF_UP)) | | 1621 | if (!(ifa->ifa_ifp->if_flags & IFF_UP)) |
1620 | return; | | 1622 | return; |
1621 | | | 1623 | |
1622 | dp = kmem_intr_alloc(sizeof(*dp), KM_NOSLEEP); | | 1624 | dp = kmem_intr_alloc(sizeof(*dp), KM_NOSLEEP); |
1623 | | | 1625 | |
1624 | mutex_enter(&arp_dad_lock); | | 1626 | mutex_enter(&arp_dad_lock); |
1625 | if (arp_dad_find(ifa) != NULL) { | | 1627 | if (arp_dad_find(ifa) != NULL) { |
1626 | mutex_exit(&arp_dad_lock); | | 1628 | mutex_exit(&arp_dad_lock); |
1627 | /* DAD already in progress */ | | 1629 | /* DAD already in progress */ |
1628 | if (dp != NULL) | | 1630 | if (dp != NULL) |
1629 | kmem_intr_free(dp, sizeof(*dp)); | | 1631 | kmem_intr_free(dp, sizeof(*dp)); |
1630 | return; | | 1632 | return; |
1631 | } | | 1633 | } |
1632 | | | 1634 | |
1633 | if (dp == NULL) { | | 1635 | if (dp == NULL) { |
1634 | mutex_exit(&arp_dad_lock); | | 1636 | mutex_exit(&arp_dad_lock); |
1635 | log(LOG_ERR, "%s: memory allocation failed for %s(%s)\n", | | 1637 | log(LOG_ERR, "%s: memory allocation failed for %s(%s)\n", |
1636 | __func__, IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), | | 1638 | __func__, IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), |
1637 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); | | 1639 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); |
1638 | return; | | 1640 | return; |
1639 | } | | 1641 | } |
1640 | | | 1642 | |
1641 | /* | | 1643 | /* |
1642 | * Send ARP packet for DAD, ip_dad_count times. | | 1644 | * Send ARP packet for DAD, ip_dad_count times. |
1643 | * Note that we must delay the first transmission. | | 1645 | * Note that we must delay the first transmission. |
1644 | */ | | 1646 | */ |
1645 | callout_init(&dp->dad_timer_ch, CALLOUT_MPSAFE); | | 1647 | callout_init(&dp->dad_timer_ch, CALLOUT_MPSAFE); |
1646 | dp->dad_ifa = ifa; | | 1648 | dp->dad_ifa = ifa; |
1647 | ifaref(ifa); /* just for safety */ | | 1649 | ifaref(ifa); /* just for safety */ |
1648 | dp->dad_count = ip_dad_count; | | 1650 | dp->dad_count = ip_dad_count; |
1649 | dp->dad_arp_announce = 0; /* Will be set when starting to announce */ | | 1651 | dp->dad_arp_announce = 0; /* Will be set when starting to announce */ |
1650 | dp->dad_arp_acount = dp->dad_arp_ocount = dp->dad_arp_tcount = 0; | | 1652 | dp->dad_arp_acount = dp->dad_arp_ocount = dp->dad_arp_tcount = 0; |
1651 | TAILQ_INSERT_TAIL(&dadq, (struct dadq *)dp, dad_list); | | 1653 | TAILQ_INSERT_TAIL(&dadq, (struct dadq *)dp, dad_list); |
1652 | | | 1654 | |
1653 | ARPLOG(LOG_DEBUG, "%s: starting DAD for %s\n", if_name(ifa->ifa_ifp), | | 1655 | ARPLOG(LOG_DEBUG, "%s: starting DAD for %s\n", if_name(ifa->ifa_ifp), |
1654 | ARPLOGADDR(&ia->ia_addr.sin_addr)); | | 1656 | ARPLOGADDR(&ia->ia_addr.sin_addr)); |
1655 | | | 1657 | |
1656 | arp_dad_starttimer(dp, cprng_fast32() % (PROBE_WAIT * hz)); | | 1658 | arp_dad_starttimer(dp, cprng_fast32() % (PROBE_WAIT * hz)); |
1657 | | | 1659 | |
1658 | mutex_exit(&arp_dad_lock); | | 1660 | mutex_exit(&arp_dad_lock); |
1659 | } | | 1661 | } |
1660 | | | 1662 | |
1661 | /* | | 1663 | /* |
1662 | * terminate DAD unconditionally. used for address removals. | | 1664 | * terminate DAD unconditionally. used for address removals. |
1663 | */ | | 1665 | */ |
1664 | static void | | 1666 | static void |
1665 | arp_dad_stop(struct ifaddr *ifa) | | 1667 | arp_dad_stop(struct ifaddr *ifa) |
1666 | { | | 1668 | { |
1667 | struct dadq *dp; | | 1669 | struct dadq *dp; |
1668 | | | 1670 | |
1669 | mutex_enter(&arp_dad_lock); | | 1671 | mutex_enter(&arp_dad_lock); |
1670 | dp = arp_dad_find(ifa); | | 1672 | dp = arp_dad_find(ifa); |
1671 | if (dp == NULL) { | | 1673 | if (dp == NULL) { |
1672 | mutex_exit(&arp_dad_lock); | | 1674 | mutex_exit(&arp_dad_lock); |
1673 | /* DAD wasn't started yet */ | | 1675 | /* DAD wasn't started yet */ |
1674 | return; | | 1676 | return; |
1675 | } | | 1677 | } |
1676 | | | 1678 | |
1677 | arp_dad_stoptimer(dp); | | 1679 | arp_dad_stoptimer(dp); |
1678 | | | 1680 | |
1679 | mutex_exit(&arp_dad_lock); | | 1681 | mutex_exit(&arp_dad_lock); |
1680 | | | 1682 | |
1681 | arp_dad_destroytimer(dp); | | 1683 | arp_dad_destroytimer(dp); |
1682 | ifafree(ifa); | | 1684 | ifafree(ifa); |
1683 | } | | 1685 | } |
1684 | | | 1686 | |
1685 | static void | | 1687 | static void |
1686 | arp_dad_timer(struct dadq *dp) | | 1688 | arp_dad_timer(struct dadq *dp) |
1687 | { | | 1689 | { |
1688 | struct ifaddr *ifa; | | 1690 | struct ifaddr *ifa; |
1689 | struct in_ifaddr *ia; | | 1691 | struct in_ifaddr *ia; |
1690 | char ipbuf[INET_ADDRSTRLEN]; | | 1692 | char ipbuf[INET_ADDRSTRLEN]; |
1691 | bool need_free = false; | | 1693 | bool need_free = false; |
1692 | | | 1694 | |
1693 | KERNEL_LOCK_UNLESS_NET_MPSAFE(); | | 1695 | KERNEL_LOCK_UNLESS_NET_MPSAFE(); |
1694 | mutex_enter(&arp_dad_lock); | | 1696 | mutex_enter(&arp_dad_lock); |
1695 | | | 1697 | |
1696 | ifa = dp->dad_ifa; | | 1698 | ifa = dp->dad_ifa; |
1697 | if (ifa == NULL) { | | 1699 | if (ifa == NULL) { |
1698 | /* dp is being destroyed by someone. Do nothing. */ | | 1700 | /* dp is being destroyed by someone. Do nothing. */ |
1699 | goto done; | | 1701 | goto done; |
1700 | } | | 1702 | } |
1701 | | | 1703 | |
1702 | ia = (struct in_ifaddr *)ifa; | | 1704 | ia = (struct in_ifaddr *)ifa; |
1703 | if (ia->ia4_flags & IN_IFF_DUPLICATED) { | | 1705 | if (ia->ia4_flags & IN_IFF_DUPLICATED) { |
1704 | log(LOG_ERR, "%s: called with duplicate address %s(%s)\n", | | 1706 | log(LOG_ERR, "%s: called with duplicate address %s(%s)\n", |
1705 | __func__, IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), | | 1707 | __func__, IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), |
1706 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); | | 1708 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); |
1707 | goto done; | | 1709 | goto done; |
1708 | } | | 1710 | } |
1709 | if ((ia->ia4_flags & IN_IFF_TENTATIVE) == 0 && dp->dad_arp_acount == 0) | | 1711 | if ((ia->ia4_flags & IN_IFF_TENTATIVE) == 0 && dp->dad_arp_acount == 0) |
1710 | { | | 1712 | { |
1711 | log(LOG_ERR, "%s: called with non-tentative address %s(%s)\n", | | 1713 | log(LOG_ERR, "%s: called with non-tentative address %s(%s)\n", |
1712 | __func__, IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), | | 1714 | __func__, IN_PRINT(ipbuf, &ia->ia_addr.sin_addr), |
1713 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); | | 1715 | ifa->ifa_ifp ? if_name(ifa->ifa_ifp) : "???"); |
1714 | goto done; | | 1716 | goto done; |
1715 | } | | 1717 | } |
1716 | | | 1718 | |
1717 | /* timeouted with IFF_{RUNNING,UP} check */ | | 1719 | /* timeouted with IFF_{RUNNING,UP} check */ |
1718 | if (dp->dad_arp_tcount > dad_maxtry) { | | 1720 | if (dp->dad_arp_tcount > dad_maxtry) { |
1719 | ARPLOG(LOG_INFO, "%s: could not run DAD, driver problem?\n", | | 1721 | ARPLOG(LOG_INFO, "%s: could not run DAD, driver problem?\n", |
1720 | if_name(ifa->ifa_ifp)); | | 1722 | if_name(ifa->ifa_ifp)); |
1721 | | | 1723 | |
1722 | arp_dad_stoptimer(dp); | | 1724 | arp_dad_stoptimer(dp); |
1723 | need_free = true; | | 1725 | need_free = true; |
1724 | goto done; | | 1726 | goto done; |
1725 | } | | 1727 | } |
1726 | | | 1728 | |
1727 | /* Need more checks? */ | | 1729 | /* Need more checks? */ |
1728 | if (dp->dad_arp_ocount < dp->dad_count) { | | 1730 | if (dp->dad_arp_ocount < dp->dad_count) { |
1729 | int adelay; | | 1731 | int adelay; |
1730 | | | 1732 | |
1731 | /* | | 1733 | /* |
1732 | * We have more ARP to go. Send ARP packet for DAD. | | 1734 | * We have more ARP to go. Send ARP packet for DAD. |
1733 | */ | | 1735 | */ |
1734 | arp_dad_output(dp, ifa); | | 1736 | arp_dad_output(dp, ifa); |
1735 | if (dp->dad_arp_ocount < dp->dad_count) | | 1737 | if (dp->dad_arp_ocount < dp->dad_count) |
1736 | adelay = (PROBE_MIN * hz) + | | 1738 | adelay = (PROBE_MIN * hz) + |
1737 | (cprng_fast32() % | | 1739 | (cprng_fast32() % |
1738 | ((PROBE_MAX * hz) - (PROBE_MIN * hz))); | | 1740 | ((PROBE_MAX * hz) - (PROBE_MIN * hz))); |
1739 | else | | 1741 | else |
1740 | adelay = ANNOUNCE_WAIT * hz; | | 1742 | adelay = ANNOUNCE_WAIT * hz; |
1741 | arp_dad_starttimer(dp, adelay); | | 1743 | arp_dad_starttimer(dp, adelay); |
1742 | goto done; | | 1744 | goto done; |
1743 | } else if (dp->dad_arp_acount == 0) { | | 1745 | } else if (dp->dad_arp_acount == 0) { |
1744 | /* | | 1746 | /* |
1745 | * We are done with DAD. | | 1747 | * We are done with DAD. |
1746 | * No duplicate address found. | | 1748 | * No duplicate address found. |
1747 | */ | | 1749 | */ |
1748 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; | | 1750 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; |
1749 | rt_addrmsg(RTM_NEWADDR, ifa); | | 1751 | rt_addrmsg(RTM_NEWADDR, ifa); |
1750 | ARPLOG(LOG_DEBUG, | | 1752 | ARPLOG(LOG_DEBUG, |
1751 | "%s: DAD complete for %s - no duplicates found\n", | | 1753 | "%s: DAD complete for %s - no duplicates found\n", |
1752 | if_name(ifa->ifa_ifp), ARPLOGADDR(&ia->ia_addr.sin_addr)); | | 1754 | if_name(ifa->ifa_ifp), ARPLOGADDR(&ia->ia_addr.sin_addr)); |
1753 | dp->dad_arp_announce = ANNOUNCE_NUM; | | 1755 | dp->dad_arp_announce = ANNOUNCE_NUM; |
1754 | goto announce; | | 1756 | goto announce; |
1755 | } else if (dp->dad_arp_acount < dp->dad_arp_announce) { | | 1757 | } else if (dp->dad_arp_acount < dp->dad_arp_announce) { |
1756 | announce: | | 1758 | announce: |
1757 | /* | | 1759 | /* |
1758 | * Announce the address. | | 1760 | * Announce the address. |
1759 | */ | | 1761 | */ |
1760 | arpannounce1(ifa); | | 1762 | arpannounce1(ifa); |
1761 | dp->dad_arp_acount++; | | 1763 | dp->dad_arp_acount++; |
1762 | if (dp->dad_arp_acount < dp->dad_arp_announce) { | | 1764 | if (dp->dad_arp_acount < dp->dad_arp_announce) { |
1763 | arp_dad_starttimer(dp, ANNOUNCE_INTERVAL * hz); | | 1765 | arp_dad_starttimer(dp, ANNOUNCE_INTERVAL * hz); |
1764 | goto done; | | 1766 | goto done; |
1765 | } | | 1767 | } |
1766 | ARPLOG(LOG_DEBUG, | | 1768 | ARPLOG(LOG_DEBUG, |
1767 | "%s: ARP announcement complete for %s\n", | | 1769 | "%s: ARP announcement complete for %s\n", |
1768 | if_name(ifa->ifa_ifp), ARPLOGADDR(&ia->ia_addr.sin_addr)); | | 1770 | if_name(ifa->ifa_ifp), ARPLOGADDR(&ia->ia_addr.sin_addr)); |
1769 | } | | 1771 | } |
1770 | | | 1772 | |
1771 | arp_dad_stoptimer(dp); | | 1773 | arp_dad_stoptimer(dp); |
1772 | need_free = true; | | 1774 | need_free = true; |
1773 | done: | | 1775 | done: |
1774 | mutex_exit(&arp_dad_lock); | | 1776 | mutex_exit(&arp_dad_lock); |
1775 | | | 1777 | |
1776 | if (need_free) { | | 1778 | if (need_free) { |
1777 | arp_dad_destroytimer(dp); | | 1779 | arp_dad_destroytimer(dp); |
1778 | KASSERT(ifa != NULL); | | 1780 | KASSERT(ifa != NULL); |
1779 | ifafree(ifa); | | 1781 | ifafree(ifa); |
1780 | } | | 1782 | } |
1781 | | | 1783 | |
1782 | KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); | | 1784 | KERNEL_UNLOCK_UNLESS_NET_MPSAFE(); |
1783 | } | | 1785 | } |
1784 | | | 1786 | |
1785 | static void | | 1787 | static void |
1786 | arp_dad_duplicated(struct ifaddr *ifa, const struct sockaddr_dl *from) | | 1788 | arp_dad_duplicated(struct ifaddr *ifa, const struct sockaddr_dl *from) |
1787 | { | | 1789 | { |
1788 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; | | 1790 | struct in_ifaddr *ia = (struct in_ifaddr *)ifa; |
1789 | struct ifnet *ifp = ifa->ifa_ifp; | | 1791 | struct ifnet *ifp = ifa->ifa_ifp; |
1790 | char ipbuf[INET_ADDRSTRLEN], llabuf[LLA_ADDRSTRLEN]; | | 1792 | char ipbuf[INET_ADDRSTRLEN], llabuf[LLA_ADDRSTRLEN]; |
1791 | const char *iastr, *llastr; | | 1793 | const char *iastr, *llastr; |
1792 | | | 1794 | |
1793 | iastr = IN_PRINT(ipbuf, &ia->ia_addr.sin_addr); | | 1795 | iastr = IN_PRINT(ipbuf, &ia->ia_addr.sin_addr); |
1794 | if (__predict_false(from == NULL)) | | 1796 | if (__predict_false(from == NULL)) |
1795 | llastr = NULL; | | 1797 | llastr = NULL; |
1796 | else | | 1798 | else |
1797 | llastr = lla_snprintf(llabuf, sizeof(llabuf), | | 1799 | llastr = lla_snprintf(llabuf, sizeof(llabuf), |
1798 | CLLADDR(from), from->sdl_alen); | | 1800 | CLLADDR(from), from->sdl_alen); |
1799 | | | 1801 | |
1800 | if (ia->ia4_flags & (IN_IFF_TENTATIVE|IN_IFF_DUPLICATED)) { | | 1802 | if (ia->ia4_flags & (IN_IFF_TENTATIVE|IN_IFF_DUPLICATED)) { |
1801 | log(LOG_ERR, | | 1803 | log(LOG_ERR, |
1802 | "%s: DAD duplicate address %s from %s\n", | | 1804 | "%s: DAD duplicate address %s from %s\n", |
1803 | if_name(ifp), iastr, llastr); | | 1805 | if_name(ifp), iastr, llastr); |
1804 | } else if (ia->ia_dad_defended == 0 || | | 1806 | } else if (ia->ia_dad_defended == 0 || |
1805 | ia->ia_dad_defended < time_uptime - DEFEND_INTERVAL) { | | 1807 | ia->ia_dad_defended < time_uptime - DEFEND_INTERVAL) { |
1806 | ia->ia_dad_defended = time_uptime; | | 1808 | ia->ia_dad_defended = time_uptime; |
1807 | arpannounce1(ifa); | | 1809 | arpannounce1(ifa); |
1808 | log(LOG_ERR, | | 1810 | log(LOG_ERR, |
1809 | "%s: DAD defended address %s from %s\n", | | 1811 | "%s: DAD defended address %s from %s\n", |
1810 | if_name(ifp), iastr, llastr); | | 1812 | if_name(ifp), iastr, llastr); |
1811 | return; | | 1813 | return; |
1812 | } else { | | 1814 | } else { |
1813 | /* If DAD is disabled, just report the duplicate. */ | | 1815 | /* If DAD is disabled, just report the duplicate. */ |
1814 | if (!ip_dad_enabled()) { | | 1816 | if (!ip_dad_enabled()) { |
1815 | log(LOG_ERR, | | 1817 | log(LOG_ERR, |
1816 | "%s: DAD ignoring duplicate address %s from %s\n", | | 1818 | "%s: DAD ignoring duplicate address %s from %s\n", |
1817 | if_name(ifp), iastr, llastr); | | 1819 | if_name(ifp), iastr, llastr); |
1818 | return; | | 1820 | return; |
1819 | } | | 1821 | } |
1820 | log(LOG_ERR, | | 1822 | log(LOG_ERR, |
1821 | "%s: DAD defence failed for %s from %s\n", | | 1823 | "%s: DAD defence failed for %s from %s\n", |
1822 | if_name(ifp), iastr, llastr); | | 1824 | if_name(ifp), iastr, llastr); |
1823 | } | | 1825 | } |
1824 | | | 1826 | |
1825 | arp_dad_stop(ifa); | | 1827 | arp_dad_stop(ifa); |
1826 | | | 1828 | |
1827 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; | | 1829 | ia->ia4_flags &= ~IN_IFF_TENTATIVE; |
1828 | if ((ia->ia4_flags & IN_IFF_DUPLICATED) == 0) { | | 1830 | if ((ia->ia4_flags & IN_IFF_DUPLICATED) == 0) { |
1829 | ia->ia4_flags |= IN_IFF_DUPLICATED; | | 1831 | ia->ia4_flags |= IN_IFF_DUPLICATED; |
1830 | /* Inform the routing socket of the duplicate address */ | | 1832 | /* Inform the routing socket of the duplicate address */ |
1831 | rt_addrmsg_src(RTM_NEWADDR, ifa, (const struct sockaddr *)from); | | 1833 | rt_addrmsg_src(RTM_NEWADDR, ifa, (const struct sockaddr *)from); |
1832 | } | | 1834 | } |
1833 | } | | 1835 | } |
1834 | | | 1836 | |
1835 | /* | | 1837 | /* |
1836 | * Called from 10 Mb/s Ethernet interrupt handlers | | 1838 | * Called from 10 Mb/s Ethernet interrupt handlers |
1837 | * when ether packet type ETHERTYPE_REVARP | | 1839 | * when ether packet type ETHERTYPE_REVARP |
1838 | * is received. Common length and type checks are done here, | | 1840 | * is received. Common length and type checks are done here, |
1839 | * then the protocol-specific routine is called. | | 1841 | * then the protocol-specific routine is called. |
1840 | */ | | 1842 | */ |
1841 | void | | 1843 | void |
1842 | revarpinput(struct mbuf *m) | | 1844 | revarpinput(struct mbuf *m) |
1843 | { | | 1845 | { |
1844 | struct arphdr *ar; | | 1846 | struct arphdr *ar; |
1845 | int arplen; | | 1847 | int arplen; |
1846 | | | 1848 | |
1847 | arplen = sizeof(struct arphdr); | | 1849 | arplen = sizeof(struct arphdr); |
1848 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) | | 1850 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) |
1849 | return; | | 1851 | return; |
1850 | ar = mtod(m, struct arphdr *); | | 1852 | ar = mtod(m, struct arphdr *); |
1851 | | | 1853 | |
1852 | if (ntohs(ar->ar_hrd) == ARPHRD_IEEE1394) { | | 1854 | if (ntohs(ar->ar_hrd) == ARPHRD_IEEE1394) { |
1853 | goto out; | | 1855 | goto out; |
1854 | } | | 1856 | } |
1855 | | | 1857 | |
1856 | arplen = sizeof(struct arphdr) + 2 * (ar->ar_hln + ar->ar_pln); | | 1858 | arplen = sizeof(struct arphdr) + 2 * (ar->ar_hln + ar->ar_pln); |
1857 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) | | 1859 | if (m->m_len < arplen && (m = m_pullup(m, arplen)) == NULL) |
1858 | return; | | 1860 | return; |
1859 | ar = mtod(m, struct arphdr *); | | 1861 | ar = mtod(m, struct arphdr *); |
1860 | | | 1862 | |
1861 | switch (ntohs(ar->ar_pro)) { | | 1863 | switch (ntohs(ar->ar_pro)) { |
1862 | case ETHERTYPE_IP: | | 1864 | case ETHERTYPE_IP: |
1863 | case ETHERTYPE_IPTRAILERS: | | 1865 | case ETHERTYPE_IPTRAILERS: |
1864 | in_revarpinput(m); | | 1866 | in_revarpinput(m); |
1865 | return; | | 1867 | return; |
1866 | | | 1868 | |
1867 | default: | | 1869 | default: |
1868 | break; | | 1870 | break; |
1869 | } | | 1871 | } |
1870 | | | 1872 | |
1871 | out: | | 1873 | out: |
1872 | m_freem(m); | | 1874 | m_freem(m); |
1873 | } | | 1875 | } |
1874 | | | 1876 | |
1875 | /* | | 1877 | /* |
1876 | * RARP for Internet protocols on 10 Mb/s Ethernet. | | 1878 | * RARP for Internet protocols on 10 Mb/s Ethernet. |
1877 | * Algorithm is that given in RFC 903. | | 1879 | * Algorithm is that given in RFC 903. |
1878 | * We are only using for bootstrap purposes to get an ip address for one of | | 1880 | * We are only using for bootstrap purposes to get an ip address for one of |
1879 | * our interfaces. Thus we support no user-interface. | | 1881 | * our interfaces. Thus we support no user-interface. |
1880 | * | | 1882 | * |
1881 | * Since the contents of the RARP reply are specific to the interface that | | 1883 | * Since the contents of the RARP reply are specific to the interface that |
1882 | * sent the request, this code must ensure that they are properly associated. | | 1884 | * sent the request, this code must ensure that they are properly associated. |
1883 | * | | 1885 | * |
1884 | * Note: also supports ARP via RARP packets, per the RFC. | | 1886 | * Note: also supports ARP via RARP packets, per the RFC. |
1885 | */ | | 1887 | */ |
1886 | void | | 1888 | void |
1887 | in_revarpinput(struct mbuf *m) | | 1889 | in_revarpinput(struct mbuf *m) |
1888 | { | | 1890 | { |
1889 | struct arphdr *ah; | | 1891 | struct arphdr *ah; |
1890 | void *tha; | | 1892 | void *tha; |
1891 | int op; | | 1893 | int op; |
1892 | struct ifnet *rcvif; | | 1894 | struct ifnet *rcvif; |
1893 | int s; | | 1895 | int s; |
1894 | | | 1896 | |
1895 | ah = mtod(m, struct arphdr *); | | 1897 | ah = mtod(m, struct arphdr *); |
1896 | op = ntohs(ah->ar_op); | | 1898 | op = ntohs(ah->ar_op); |
1897 | | | 1899 | |
1898 | rcvif = m_get_rcvif(m, &s); | | 1900 | rcvif = m_get_rcvif(m, &s); |
1899 | if (__predict_false(rcvif == NULL)) | | 1901 | if (__predict_false(rcvif == NULL)) |
1900 | goto out; | | 1902 | goto out; |
1901 | if (rcvif->if_flags & IFF_NOARP) | | 1903 | if (rcvif->if_flags & IFF_NOARP) |
1902 | goto out; | | 1904 | goto out; |
1903 | | | 1905 | |
1904 | switch (rcvif->if_type) { | | 1906 | switch (rcvif->if_type) { |
1905 | case IFT_IEEE1394: | | 1907 | case IFT_IEEE1394: |
1906 | /* ARP without target hardware address is not supported */ | | 1908 | /* ARP without target hardware address is not supported */ |
1907 | goto out; | | 1909 | goto out; |
1908 | default: | | 1910 | default: |
1909 | break; | | 1911 | break; |
1910 | } | | 1912 | } |
1911 | | | 1913 | |
1912 | switch (op) { | | 1914 | switch (op) { |
1913 | case ARPOP_REQUEST: | | 1915 | case ARPOP_REQUEST: |
1914 | case ARPOP_REPLY: /* per RFC */ | | 1916 | case ARPOP_REPLY: /* per RFC */ |
1915 | m_put_rcvif(rcvif, &s); | | 1917 | m_put_rcvif(rcvif, &s); |
1916 | in_arpinput(m); | | 1918 | in_arpinput(m); |
1917 | return; | | 1919 | return; |
1918 | case ARPOP_REVREPLY: | | 1920 | case ARPOP_REVREPLY: |
1919 | break; | | 1921 | break; |
1920 | case ARPOP_REVREQUEST: /* handled by rarpd(8) */ | | 1922 | case ARPOP_REVREQUEST: /* handled by rarpd(8) */ |
1921 | default: | | 1923 | default: |
1922 | goto out; | | 1924 | goto out; |
1923 | } | | 1925 | } |
1924 | if (!revarp_in_progress) | | 1926 | if (!revarp_in_progress) |
1925 | goto out; | | 1927 | goto out; |
1926 | if (rcvif != myip_ifp) /* !same interface */ | | 1928 | if (rcvif != myip_ifp) /* !same interface */ |
1927 | goto out; | | 1929 | goto out; |
1928 | if (myip_initialized) | | 1930 | if (myip_initialized) |
1929 | goto wake; | | 1931 | goto wake; |
1930 | tha = ar_tha(ah); | | 1932 | tha = ar_tha(ah); |
1931 | if (tha == NULL) | | 1933 | if (tha == NULL) |
1932 | goto out; | | 1934 | goto out; |
1933 | if (ah->ar_pln != sizeof(struct in_addr)) | | 1935 | if (ah->ar_pln != sizeof(struct in_addr)) |
1934 | goto out; | | 1936 | goto out; |
1935 | if (ah->ar_hln != rcvif->if_sadl->sdl_alen) | | 1937 | if (ah->ar_hln != rcvif->if_sadl->sdl_alen) |
1936 | goto out; | | 1938 | goto out; |
1937 | if (memcmp(tha, CLLADDR(rcvif->if_sadl), rcvif->if_sadl->sdl_alen)) | | 1939 | if (memcmp(tha, CLLADDR(rcvif->if_sadl), rcvif->if_sadl->sdl_alen)) |
1938 | goto out; | | 1940 | goto out; |
1939 | memcpy(&srv_ip, ar_spa(ah), sizeof(srv_ip)); | | 1941 | memcpy(&srv_ip, ar_spa(ah), sizeof(srv_ip)); |
1940 | memcpy(&myip, ar_tpa(ah), sizeof(myip)); | | 1942 | memcpy(&myip, ar_tpa(ah), sizeof(myip)); |
1941 | myip_initialized = 1; | | 1943 | myip_initialized = 1; |
1942 | wake: /* Do wakeup every time in case it was missed. */ | | 1944 | wake: /* Do wakeup every time in case it was missed. */ |
1943 | wakeup((void *)&myip); | | 1945 | wakeup((void *)&myip); |
1944 | | | 1946 | |
1945 | out: | | 1947 | out: |
1946 | m_put_rcvif(rcvif, &s); | | 1948 | m_put_rcvif(rcvif, &s); |
1947 | m_freem(m); | | 1949 | m_freem(m); |
1948 | } | | 1950 | } |
1949 | | | 1951 | |
1950 | /* | | 1952 | /* |
1951 | * Send a RARP request for the ip address of the specified interface. | | 1953 | * Send a RARP request for the ip address of the specified interface. |
1952 | * The request should be RFC 903-compliant. | | 1954 | * The request should be RFC 903-compliant. |
1953 | */ | | 1955 | */ |
1954 | static void | | 1956 | static void |
1955 | revarprequest(struct ifnet *ifp) | | 1957 | revarprequest(struct ifnet *ifp) |
1956 | { | | 1958 | { |
1957 | struct sockaddr sa; | | 1959 | struct sockaddr sa; |
1958 | struct mbuf *m; | | 1960 | struct mbuf *m; |
1959 | struct arphdr *ah; | | 1961 | struct arphdr *ah; |
1960 | void *tha; | | 1962 | void *tha; |
1961 | | | 1963 | |
1962 | if ((m = m_gethdr(M_DONTWAIT, MT_DATA)) == NULL) | | 1964 | if ((m = m_gethdr(M_DONTWAIT, MT_DATA)) == NULL) |
1963 | return; | | 1965 | return; |
1964 | MCLAIM(m, &arpdomain.dom_mowner); | | 1966 | MCLAIM(m, &arpdomain.dom_mowner); |
1965 | m->m_len = sizeof(*ah) + 2*sizeof(struct in_addr) + | | 1967 | m->m_len = sizeof(*ah) + 2*sizeof(struct in_addr) + |
1966 | 2*ifp->if_addrlen; | | 1968 | 2*ifp->if_addrlen; |
1967 | m->m_pkthdr.len = m->m_len; | | 1969 | m->m_pkthdr.len = m->m_len; |
1968 | m_align(m, m->m_len); | | 1970 | m_align(m, m->m_len); |
1969 | ah = mtod(m, struct arphdr *); | | 1971 | ah = mtod(m, struct arphdr *); |
1970 | memset(ah, 0, m->m_len); | | 1972 | memset(ah, 0, m->m_len); |
1971 | ah->ar_pro = htons(ETHERTYPE_IP); | | 1973 | ah->ar_pro = htons(ETHERTYPE_IP); |
1972 | ah->ar_hln = ifp->if_addrlen; /* hardware address length */ | | 1974 | ah->ar_hln = ifp->if_addrlen; /* hardware address length */ |
1973 | ah->ar_pln = sizeof(struct in_addr); /* protocol address length */ | | 1975 | ah->ar_pln = sizeof(struct in_addr); /* protocol address length */ |
1974 | ah->ar_op = htons(ARPOP_REVREQUEST); | | 1976 | ah->ar_op = htons(ARPOP_REVREQUEST); |
1975 | | | 1977 | |
1976 | memcpy(ar_sha(ah), CLLADDR(ifp->if_sadl), ah->ar_hln); | | 1978 | memcpy(ar_sha(ah), CLLADDR(ifp->if_sadl), ah->ar_hln); |
1977 | tha = ar_tha(ah); | | 1979 | tha = ar_tha(ah); |
1978 | if (tha == NULL) { | | 1980 | if (tha == NULL) { |
1979 | m_free(m); | | 1981 | m_free(m); |
1980 | return; | | 1982 | return; |
1981 | } | | 1983 | } |
1982 | memcpy(tha, CLLADDR(ifp->if_sadl), ah->ar_hln); | | 1984 | memcpy(tha, CLLADDR(ifp->if_sadl), ah->ar_hln); |
1983 | | | 1985 | |
1984 | sa.sa_family = AF_ARP; | | 1986 | sa.sa_family = AF_ARP; |
1985 | sa.sa_len = 2; | | 1987 | sa.sa_len = 2; |
1986 | m->m_flags |= M_BCAST; | | 1988 | m->m_flags |= M_BCAST; |
1987 | | | 1989 | |
1988 | if_output_lock(ifp, ifp, m, &sa, NULL); | | 1990 | if_output_lock(ifp, ifp, m, &sa, NULL); |
1989 | } | | 1991 | } |
1990 | | | 1992 | |
1991 | /* | | 1993 | /* |
1992 | * RARP for the ip address of the specified interface, but also | | 1994 | * RARP for the ip address of the specified interface, but also |
1993 | * save the ip address of the server that sent the answer. | | 1995 | * save the ip address of the server that sent the answer. |
1994 | * Timeout if no response is received. | | 1996 | * Timeout if no response is received. |
1995 | */ | | 1997 | */ |
1996 | int | | 1998 | int |
1997 | revarpwhoarewe(struct ifnet *ifp, struct in_addr *serv_in, | | 1999 | revarpwhoarewe(struct ifnet *ifp, struct in_addr *serv_in, |
1998 | struct in_addr *clnt_in) | | 2000 | struct in_addr *clnt_in) |
1999 | { | | 2001 | { |
2000 | int result, count = 20; | | 2002 | int result, count = 20; |
2001 | | | 2003 | |
2002 | myip_initialized = 0; | | 2004 | myip_initialized = 0; |
2003 | myip_ifp = ifp; | | 2005 | myip_ifp = ifp; |
2004 | | | 2006 | |
2005 | revarp_in_progress = 1; | | 2007 | revarp_in_progress = 1; |
2006 | while (count--) { | | 2008 | while (count--) { |
2007 | revarprequest(ifp); | | 2009 | revarprequest(ifp); |
2008 | result = tsleep((void *)&myip, PSOCK, "revarp", hz/2); | | 2010 | result = tsleep((void *)&myip, PSOCK, "revarp", hz/2); |
2009 | if (result != EWOULDBLOCK) | | 2011 | if (result != EWOULDBLOCK) |
2010 | break; | | 2012 | break; |
2011 | } | | 2013 | } |
2012 | revarp_in_progress = 0; | | 2014 | revarp_in_progress = 0; |
2013 | | | 2015 | |
2014 | if (!myip_initialized) | | 2016 | if (!myip_initialized) |
2015 | return ENETUNREACH; | | 2017 | return ENETUNREACH; |
2016 | | | 2018 | |
2017 | memcpy(serv_in, &srv_ip, sizeof(*serv_in)); | | 2019 | memcpy(serv_in, &srv_ip, sizeof(*serv_in)); |
2018 | memcpy(clnt_in, &myip, sizeof(*clnt_in)); | | 2020 | memcpy(clnt_in, &myip, sizeof(*clnt_in)); |
2019 | return 0; | | 2021 | return 0; |
2020 | } | | 2022 | } |
2021 | | | 2023 | |
2022 | void | | 2024 | void |
2023 | arp_stat_add(int type, uint64_t count) | | 2025 | arp_stat_add(int type, uint64_t count) |
2024 | { | | 2026 | { |
2025 | ARP_STATADD(type, count); | | 2027 | ARP_STATADD(type, count); |
2026 | } | | 2028 | } |
2027 | | | 2029 | |
2028 | static int | | 2030 | static int |
2029 | sysctl_net_inet_arp_stats(SYSCTLFN_ARGS) | | 2031 | sysctl_net_inet_arp_stats(SYSCTLFN_ARGS) |
2030 | { | | 2032 | { |
2031 | | | 2033 | |
2032 | return NETSTAT_SYSCTL(arpstat_percpu, ARP_NSTATS); | | 2034 | return NETSTAT_SYSCTL(arpstat_percpu, ARP_NSTATS); |
2033 | } | | 2035 | } |
2034 | | | 2036 | |
2035 | static void | | 2037 | static void |
2036 | sysctl_net_inet_arp_setup(struct sysctllog **clog) | | 2038 | sysctl_net_inet_arp_setup(struct sysctllog **clog) |
2037 | { | | 2039 | { |
2038 | const struct sysctlnode *node; | | 2040 | const struct sysctlnode *node; |
2039 | | | 2041 | |
2040 | sysctl_createv(clog, 0, NULL, NULL, | | 2042 | sysctl_createv(clog, 0, NULL, NULL, |
2041 | CTLFLAG_PERMANENT, | | 2043 | CTLFLAG_PERMANENT, |
2042 | CTLTYPE_NODE, "inet", NULL, | | 2044 | CTLTYPE_NODE, "inet", NULL, |
2043 | NULL, 0, NULL, 0, | | 2045 | NULL, 0, NULL, 0, |
2044 | CTL_NET, PF_INET, CTL_EOL); | | 2046 | CTL_NET, PF_INET, CTL_EOL); |
2045 | sysctl_createv(clog, 0, NULL, &node, | | 2047 | sysctl_createv(clog, 0, NULL, &node, |
2046 | CTLFLAG_PERMANENT, | | 2048 | CTLFLAG_PERMANENT, |
2047 | CTLTYPE_NODE, "arp", | | 2049 | CTLTYPE_NODE, "arp", |
2048 | SYSCTL_DESCR("Address Resolution Protocol"), | | 2050 | SYSCTL_DESCR("Address Resolution Protocol"), |
2049 | NULL, 0, NULL, 0, | | 2051 | NULL, 0, NULL, 0, |
2050 | CTL_NET, PF_INET, CTL_CREATE, CTL_EOL); | | 2052 | CTL_NET, PF_INET, CTL_CREATE, CTL_EOL); |
2051 | | | 2053 | |
2052 | sysctl_createv(clog, 0, NULL, NULL, | | 2054 | sysctl_createv(clog, 0, NULL, NULL, |
2053 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, | | 2055 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
2054 | CTLTYPE_INT, "keep", | | 2056 | CTLTYPE_INT, "keep", |
2055 | SYSCTL_DESCR("Valid ARP entry lifetime in seconds"), | | 2057 | SYSCTL_DESCR("Valid ARP entry lifetime in seconds"), |
2056 | NULL, 0, &arpt_keep, 0, | | 2058 | NULL, 0, &arpt_keep, 0, |
2057 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); | | 2059 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); |
2058 | | | 2060 | |
2059 | sysctl_createv(clog, 0, NULL, NULL, | | 2061 | sysctl_createv(clog, 0, NULL, NULL, |
2060 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, | | 2062 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
2061 | CTLTYPE_INT, "down", | | 2063 | CTLTYPE_INT, "down", |
2062 | SYSCTL_DESCR("Failed ARP entry lifetime in seconds"), | | 2064 | SYSCTL_DESCR("Failed ARP entry lifetime in seconds"), |
2063 | NULL, 0, &arpt_down, 0, | | 2065 | NULL, 0, &arpt_down, 0, |
2064 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); | | 2066 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); |
2065 | | | 2067 | |
2066 | sysctl_createv(clog, 0, NULL, NULL, | | 2068 | sysctl_createv(clog, 0, NULL, NULL, |
2067 | CTLFLAG_PERMANENT, | | 2069 | CTLFLAG_PERMANENT, |
2068 | CTLTYPE_STRUCT, "stats", | | 2070 | CTLTYPE_STRUCT, "stats", |
2069 | SYSCTL_DESCR("ARP statistics"), | | 2071 | SYSCTL_DESCR("ARP statistics"), |
2070 | sysctl_net_inet_arp_stats, 0, NULL, 0, | | 2072 | sysctl_net_inet_arp_stats, 0, NULL, 0, |
2071 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); | | 2073 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); |
2072 | | | 2074 | |
2073 | sysctl_createv(clog, 0, NULL, NULL, | | 2075 | sysctl_createv(clog, 0, NULL, NULL, |
2074 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, | | 2076 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
2075 | CTLTYPE_INT, "log_movements", | | 2077 | CTLTYPE_INT, "log_movements", |
2076 | SYSCTL_DESCR("log ARP replies from MACs different than" | | 2078 | SYSCTL_DESCR("log ARP replies from MACs different than" |
2077 | " the one in the cache"), | | 2079 | " the one in the cache"), |
2078 | NULL, 0, &log_movements, 0, | | 2080 | NULL, 0, &log_movements, 0, |
2079 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); | | 2081 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); |
2080 | | | 2082 | |
2081 | sysctl_createv(clog, 0, NULL, NULL, | | 2083 | sysctl_createv(clog, 0, NULL, NULL, |
2082 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, | | 2084 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
2083 | CTLTYPE_INT, "log_permanent_modify", | | 2085 | CTLTYPE_INT, "log_permanent_modify", |
2084 | SYSCTL_DESCR("log ARP replies from MACs different than" | | 2086 | SYSCTL_DESCR("log ARP replies from MACs different than" |
2085 | " the one in the permanent arp entry"), | | 2087 | " the one in the permanent arp entry"), |
2086 | NULL, 0, &log_permanent_modify, 0, | | 2088 | NULL, 0, &log_permanent_modify, 0, |
2087 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); | | 2089 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); |
2088 | | | 2090 | |
2089 | sysctl_createv(clog, 0, NULL, NULL, | | 2091 | sysctl_createv(clog, 0, NULL, NULL, |
2090 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, | | 2092 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
2091 | CTLTYPE_INT, "log_wrong_iface", | | 2093 | CTLTYPE_INT, "log_wrong_iface", |
2092 | SYSCTL_DESCR("log ARP packets arriving on the wrong" | | 2094 | SYSCTL_DESCR("log ARP packets arriving on the wrong" |
2093 | " interface"), | | 2095 | " interface"), |
2094 | NULL, 0, &log_wrong_iface, 0, | | 2096 | NULL, 0, &log_wrong_iface, 0, |
2095 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); | | 2097 | CTL_NET,PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); |
2096 | | | 2098 | |
2097 | sysctl_createv(clog, 0, NULL, NULL, | | 2099 | sysctl_createv(clog, 0, NULL, NULL, |
2098 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, | | 2100 | CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
2099 | CTLTYPE_INT, "debug", | | 2101 | CTLTYPE_INT, "debug", |
2100 | SYSCTL_DESCR("Enable ARP DAD debug output"), | | 2102 | SYSCTL_DESCR("Enable ARP DAD debug output"), |
2101 | NULL, 0, &arp_debug, 0, | | 2103 | NULL, 0, &arp_debug, 0, |
2102 | CTL_NET, PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); | | 2104 | CTL_NET, PF_INET, node->sysctl_num, CTL_CREATE, CTL_EOL); |
2103 | } | | 2105 | } |
2104 | | | 2106 | |
2105 | #endif /* INET */ | | 2107 | #endif /* INET */ |