1/*
2 * Copyright (c) 1984, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1994
5 * Geoffrey M. Rehmet, All rights reserved.
6 *
7 * This code is derived from software which forms part of the 4.4-Lite
8 * Berkeley software distribution, which was in derived from software
9 * contributed to Berkeley by Sun Microsystems, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40/*
41 * from arp.c 8.2 (Berkeley) 1/2/94
42 */
43
44#include <sys/cdefs.h>
| 1/*
2 * Copyright (c) 1984, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1994
5 * Geoffrey M. Rehmet, All rights reserved.
6 *
7 * This code is derived from software which forms part of the 4.4-Lite
8 * Berkeley software distribution, which was in derived from software
9 * contributed to Berkeley by Sun Microsystems, Inc.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by the University of
22 * California, Berkeley and its contributors.
23 * 4. Neither the name of the University nor the names of its contributors
24 * may be used to endorse or promote products derived from this software
25 * without specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * SUCH DAMAGE.
38 */
39
40/*
41 * from arp.c 8.2 (Berkeley) 1/2/94
42 */
43
44#include <sys/cdefs.h>
|
45__FBSDID("$FreeBSD: head/libexec/bootpd/rtmsg.c 216226 2010-12-06 09:39:36Z glebius $");
| 45__FBSDID("$FreeBSD: head/libexec/bootpd/rtmsg.c 246143 2013-01-31 08:55:21Z glebius $");
|
46
47#include <sys/param.h>
48/*
49 * Verify that we are at least 4.4 BSD
50 */
51#if defined(BSD)
52#if BSD >= 199306
53
54#include <sys/socket.h>
55#include <sys/filio.h>
56#include <sys/time.h>
57
58#include <net/if.h>
59#include <net/if_dl.h>
60#include <net/if_types.h>
61#include <net/route.h>
62
63#include <netinet/in.h>
64#include <netinet/if_ether.h>
65
66#include <arpa/inet.h>
67
68#include <errno.h>
69#include <stdio.h>
70#include <stdlib.h>
71#include <string.h>
72#include <syslog.h>
73#include <unistd.h>
74
75#include "report.h"
76
77
78static int rtmsg(int);
79
80static int s = -1; /* routing socket */
81
82
83/*
84 * Open the routing socket
85 */
86static void getsocket () {
87 if (s < 0) {
88 s = socket(PF_ROUTE, SOCK_RAW, 0);
89 if (s < 0) {
90 report(LOG_ERR, "socket %s", strerror(errno));
91 exit(1);
92 }
93 } else {
94 /*
95 * Drain the socket of any unwanted routing messages.
96 */
97 int n;
98 char buf[512];
99
100 ioctl(s, FIONREAD, &n);
101 while (n > 0) {
102 read(s, buf, sizeof buf);
103 ioctl(s, FIONREAD, &n);
104 }
105 }
106}
107
108static struct sockaddr_in so_mask = {8, 0, 0, { 0xffffffff}};
| 46
47#include <sys/param.h>
48/*
49 * Verify that we are at least 4.4 BSD
50 */
51#if defined(BSD)
52#if BSD >= 199306
53
54#include <sys/socket.h>
55#include <sys/filio.h>
56#include <sys/time.h>
57
58#include <net/if.h>
59#include <net/if_dl.h>
60#include <net/if_types.h>
61#include <net/route.h>
62
63#include <netinet/in.h>
64#include <netinet/if_ether.h>
65
66#include <arpa/inet.h>
67
68#include <errno.h>
69#include <stdio.h>
70#include <stdlib.h>
71#include <string.h>
72#include <syslog.h>
73#include <unistd.h>
74
75#include "report.h"
76
77
78static int rtmsg(int);
79
80static int s = -1; /* routing socket */
81
82
83/*
84 * Open the routing socket
85 */
86static void getsocket () {
87 if (s < 0) {
88 s = socket(PF_ROUTE, SOCK_RAW, 0);
89 if (s < 0) {
90 report(LOG_ERR, "socket %s", strerror(errno));
91 exit(1);
92 }
93 } else {
94 /*
95 * Drain the socket of any unwanted routing messages.
96 */
97 int n;
98 char buf[512];
99
100 ioctl(s, FIONREAD, &n);
101 while (n > 0) {
102 read(s, buf, sizeof buf);
103 ioctl(s, FIONREAD, &n);
104 }
105 }
106}
107
108static struct sockaddr_in so_mask = {8, 0, 0, { 0xffffffff}};
|
109static struct sockaddr_inarp blank_sin = {sizeof(blank_sin), AF_INET }, sin_m;
| 109static struct sockaddr_in blank_sin = {sizeof(blank_sin), AF_INET }, sin_m;
|
110static struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
| 110static struct sockaddr_dl blank_sdl = {sizeof(blank_sdl), AF_LINK }, sdl_m;
|
111static int expire_time, flags, export_only, doing_proxy;
| 111static int expire_time, flags, doing_proxy;
|
112static struct {
113 struct rt_msghdr m_rtm;
114 char m_space[512];
115} m_rtmsg;
116
117/*
118 * Set an individual arp entry
119 */
120int bsd_arp_set(ia, eaddr, len)
121 struct in_addr *ia;
122 char *eaddr;
123 int len;
124{
| 112static struct {
113 struct rt_msghdr m_rtm;
114 char m_space[512];
115} m_rtmsg;
116
117/*
118 * Set an individual arp entry
119 */
120int bsd_arp_set(ia, eaddr, len)
121 struct in_addr *ia;
122 char *eaddr;
123 int len;
124{
|
125 register struct sockaddr_inarp *sin = &sin_m;
| 125 register struct sockaddr_in *sin = &sin_m;
|
126 register struct sockaddr_dl *sdl;
127 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
128 u_char *ea;
129 struct timespec tp;
130 int op = RTM_ADD;
131
132 getsocket();
133 sdl_m = blank_sdl;
134 sin_m = blank_sin;
135 sin->sin_addr = *ia;
136
137 ea = (u_char *)LLADDR(&sdl_m);
138 bcopy(eaddr, ea, len);
139 sdl_m.sdl_alen = len;
| 126 register struct sockaddr_dl *sdl;
127 register struct rt_msghdr *rtm = &(m_rtmsg.m_rtm);
128 u_char *ea;
129 struct timespec tp;
130 int op = RTM_ADD;
131
132 getsocket();
133 sdl_m = blank_sdl;
134 sin_m = blank_sin;
135 sin->sin_addr = *ia;
136
137 ea = (u_char *)LLADDR(&sdl_m);
138 bcopy(eaddr, ea, len);
139 sdl_m.sdl_alen = len;
|
140 doing_proxy = flags = export_only = expire_time = 0;
| 140 doing_proxy = flags = expire_time = 0;
|
141
142 /* make arp entry temporary */
143 clock_gettime(CLOCK_MONOTONIC, &tp);
144 expire_time = tp.tv_sec + 20 * 60;
145
146tryagain:
147 if (rtmsg(RTM_GET) < 0) {
148 report(LOG_WARNING, "rtmget: %s", strerror(errno));
149 return (1);
150 }
| 141
142 /* make arp entry temporary */
143 clock_gettime(CLOCK_MONOTONIC, &tp);
144 expire_time = tp.tv_sec + 20 * 60;
145
146tryagain:
147 if (rtmsg(RTM_GET) < 0) {
148 report(LOG_WARNING, "rtmget: %s", strerror(errno));
149 return (1);
150 }
|
151 sin = (struct sockaddr_inarp *)(rtm + 1);
| 151 sin = (struct sockaddr_in *)(rtm + 1);
|
152 sdl = (struct sockaddr_dl *)(sin->sin_len + (char *)sin);
153 if (sin->sin_addr.s_addr == sin_m.sin_addr.s_addr) {
154 if (sdl->sdl_family == AF_LINK &&
155 !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
156 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
157 case IFT_ISO88024: case IFT_ISO88025:
158 op = RTM_CHANGE;
159 goto overwrite;
160 }
161 if (doing_proxy == 0) {
162 report(LOG_WARNING, "set: can only proxy for %s\n",
163 inet_ntoa(sin->sin_addr));
164 return (1);
165 }
| 152 sdl = (struct sockaddr_dl *)(sin->sin_len + (char *)sin);
153 if (sin->sin_addr.s_addr == sin_m.sin_addr.s_addr) {
154 if (sdl->sdl_family == AF_LINK &&
155 !(rtm->rtm_flags & RTF_GATEWAY)) switch (sdl->sdl_type) {
156 case IFT_ETHER: case IFT_FDDI: case IFT_ISO88023:
157 case IFT_ISO88024: case IFT_ISO88025:
158 op = RTM_CHANGE;
159 goto overwrite;
160 }
161 if (doing_proxy == 0) {
162 report(LOG_WARNING, "set: can only proxy for %s\n",
163 inet_ntoa(sin->sin_addr));
164 return (1);
165 }
|
166 if (sin_m.sin_other & SIN_PROXY) {
167 report(LOG_WARNING,
168 "set: proxy entry exists for non 802 device\n");
169 return(1);
170 }
171 sin_m.sin_other = SIN_PROXY;
172 export_only = 1;
| |
173 goto tryagain;
174 }
175overwrite:
176 if (sdl->sdl_family != AF_LINK) {
177 report(LOG_WARNING,
178 "cannot intuit interface index and type for %s\n",
179 inet_ntoa(sin->sin_addr));
180 return (1);
181 }
182 sdl_m.sdl_type = sdl->sdl_type;
183 sdl_m.sdl_index = sdl->sdl_index;
184 return (rtmsg(op));
185}
186
187
188static int rtmsg(cmd)
189 int cmd;
190{
191 static int seq;
192 int rlen;
193 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
194 register char *cp = m_rtmsg.m_space;
195 register int l;
196
197 errno = 0;
198 bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
199 rtm->rtm_flags = flags;
200 rtm->rtm_version = RTM_VERSION;
201
202 switch (cmd) {
203 default:
204 report(LOG_ERR, "set_arp: internal wrong cmd - exiting");
205 exit(1);
206 case RTM_ADD:
207 case RTM_CHANGE:
208 rtm->rtm_addrs |= RTA_GATEWAY;
209 rtm->rtm_rmx.rmx_expire = expire_time;
210 rtm->rtm_inits = RTV_EXPIRE;
211 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
| 166 goto tryagain;
167 }
168overwrite:
169 if (sdl->sdl_family != AF_LINK) {
170 report(LOG_WARNING,
171 "cannot intuit interface index and type for %s\n",
172 inet_ntoa(sin->sin_addr));
173 return (1);
174 }
175 sdl_m.sdl_type = sdl->sdl_type;
176 sdl_m.sdl_index = sdl->sdl_index;
177 return (rtmsg(op));
178}
179
180
181static int rtmsg(cmd)
182 int cmd;
183{
184 static int seq;
185 int rlen;
186 register struct rt_msghdr *rtm = &m_rtmsg.m_rtm;
187 register char *cp = m_rtmsg.m_space;
188 register int l;
189
190 errno = 0;
191 bzero((char *)&m_rtmsg, sizeof(m_rtmsg));
192 rtm->rtm_flags = flags;
193 rtm->rtm_version = RTM_VERSION;
194
195 switch (cmd) {
196 default:
197 report(LOG_ERR, "set_arp: internal wrong cmd - exiting");
198 exit(1);
199 case RTM_ADD:
200 case RTM_CHANGE:
201 rtm->rtm_addrs |= RTA_GATEWAY;
202 rtm->rtm_rmx.rmx_expire = expire_time;
203 rtm->rtm_inits = RTV_EXPIRE;
204 rtm->rtm_flags |= (RTF_HOST | RTF_STATIC | RTF_LLDATA);
|
212 sin_m.sin_other = 0;
| |
213 if (doing_proxy) {
| 205 if (doing_proxy) {
|
214 if (export_only)
215 sin_m.sin_other = SIN_PROXY;
216 else {
217 rtm->rtm_addrs |= RTA_NETMASK;
218 rtm->rtm_flags &= ~RTF_HOST;
219 }
| 206 rtm->rtm_addrs |= RTA_NETMASK;
207 rtm->rtm_flags &= ~RTF_HOST;
|
220 }
221 /* FALLTHROUGH */
222 case RTM_GET:
223 rtm->rtm_addrs |= RTA_DST;
224 }
225#define NEXTADDR(w, s) \
226 if (rtm->rtm_addrs & (w)) { \
227 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
228
229 NEXTADDR(RTA_DST, sin_m);
230 NEXTADDR(RTA_GATEWAY, sdl_m);
231 NEXTADDR(RTA_NETMASK, so_mask);
232
233 rtm->rtm_msglen = cp - (char *)&m_rtmsg;
234
235 l = rtm->rtm_msglen;
236 rtm->rtm_seq = ++seq;
237 rtm->rtm_type = cmd;
238 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
239 if ((errno != ESRCH) && !(errno == EEXIST && cmd == RTM_ADD)){
240 report(LOG_WARNING, "writing to routing socket: %s",
241 strerror(errno));
242 return (-1);
243 }
244 }
245 do {
246 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
247 } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq || rtm->rtm_pid != getpid()));
248 if (l < 0)
249 report(LOG_WARNING, "arp: read from routing socket: %s\n",
250 strerror(errno));
251 return (0);
252}
253
254#endif /* BSD */
255#endif /* BSD >= 199306 */
| 208 }
209 /* FALLTHROUGH */
210 case RTM_GET:
211 rtm->rtm_addrs |= RTA_DST;
212 }
213#define NEXTADDR(w, s) \
214 if (rtm->rtm_addrs & (w)) { \
215 bcopy((char *)&s, cp, sizeof(s)); cp += sizeof(s);}
216
217 NEXTADDR(RTA_DST, sin_m);
218 NEXTADDR(RTA_GATEWAY, sdl_m);
219 NEXTADDR(RTA_NETMASK, so_mask);
220
221 rtm->rtm_msglen = cp - (char *)&m_rtmsg;
222
223 l = rtm->rtm_msglen;
224 rtm->rtm_seq = ++seq;
225 rtm->rtm_type = cmd;
226 if ((rlen = write(s, (char *)&m_rtmsg, l)) < 0) {
227 if ((errno != ESRCH) && !(errno == EEXIST && cmd == RTM_ADD)){
228 report(LOG_WARNING, "writing to routing socket: %s",
229 strerror(errno));
230 return (-1);
231 }
232 }
233 do {
234 l = read(s, (char *)&m_rtmsg, sizeof(m_rtmsg));
235 } while (l > 0 && (rtm->rtm_type != cmd || rtm->rtm_seq != seq || rtm->rtm_pid != getpid()));
236 if (l < 0)
237 report(LOG_WARNING, "arp: read from routing socket: %s\n",
238 strerror(errno));
239 return (0);
240}
241
242#endif /* BSD */
243#endif /* BSD >= 199306 */
|