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rtmsg.c (216226) rtmsg.c (246143)
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

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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

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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

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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

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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);

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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);

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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);}

--- 28 unchanged lines hidden --- 		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);}

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