3 * Similar to the standard Unix route, but with only the necessary
6 * Bjorn Wesen, Axis Communications AB
8 * Author of the original route:
9 * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
10 * (derived from FvK's 'route.c 1.70 01/04/94')
12 * This program is free software; you can redistribute it
13 * and/or modify it under the terms of the GNU General
14 * Public License as published by the Free Software
15 * Foundation; either version 2 of the License, or (at
16 * your option) any later version.
18 * $Id: route.c,v 1.6 2001/02/18 20:12:25 andersen Exp $
20 * displayroute() code added by Vladimir N. Oleynik <dzo@simtreas.ru>
21 * busybox style adjustments by Larry Doolittle <LRDoolittle@lbl.gov>
22 * displayroute() format now matches net-tools-1.57/lib/inet_gr.c line 173.
26 #include <sys/types.h>
27 #include <sys/ioctl.h>
28 #include <sys/socket.h>
29 #include <net/route.h>
30 #include <linux/param.h> // HZ
31 #include <netinet/in.h>
32 #include <arpa/inet.h>
44 #define RTACTION_ADD 1
45 #define RTACTION_DEL 2
46 #define RTACTION_HELP 3
47 #define RTACTION_FLUSH 4
48 #define RTACTION_SHOW 5
59 /* resolve XXX.YYY.ZZZ.QQQ -> binary */
62 INET_resolve(char *name, struct sockaddr *sa)
64 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
66 sin->sin_family = AF_INET;
69 /* Default is special, meaning 0.0.0.0. */
70 if (strcmp(name, "default")==0) {
71 sin->sin_addr.s_addr = INADDR_ANY;
74 /* Look to see if it's a dotted quad. */
75 if (inet_aton(name, &sin->sin_addr)) {
82 #if defined (SIOCADDRTOLD) || defined (RTF_IRTT) /* route */
83 #define HAVE_NEW_ADDRT 1
85 #ifdef RTF_IRTT /* route */
86 #define HAVE_RTF_IRTT 1
88 #ifdef RTF_REJECT /* route */
89 #define HAVE_RTF_REJECT 1
93 #define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
94 #define full_mask(x) (x)
96 #define mask_in_addr(x) ((x).rt_genmask)
97 #define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
100 /* add or delete a route depending on action */
103 INET_setroute(int action, int options, char **args)
106 char target[128], gateway[128] = "NONE", netmask[128] = "default";
112 if (strcmp(*args, "-net")==0) {
115 } else if (strcmp(*args, "-host")==0) {
122 safe_strncpy(target, *args++, (sizeof target));
124 /* Clean out the RTREQ structure. */
125 memset((char *) &rt, 0, sizeof(struct rtentry));
128 if ((isnet = INET_resolve(target, &rt.rt_dst)) < 0) {
129 error_msg(_("can't resolve %s"), target);
130 return EXIT_FAILURE; /* XXX change to E_something */
146 /* Fill in the other fields. */
147 rt.rt_flags = (RTF_UP | RTF_HOST);
149 rt.rt_flags &= ~RTF_HOST;
152 if (strcmp(*args, "metric")==0) {
156 if (!*args || !isdigit(**args))
158 metric = atoi(*args);
160 rt.rt_metric = metric + 1;
162 ENOSUPP("inet_setroute", "NEW_ADDRT (metric)"); /* XXX Fixme */
168 if (strcmp(*args, "netmask")==0) {
169 struct sockaddr mask;
172 if (!*args || mask_in_addr(rt))
174 safe_strncpy(netmask, *args, (sizeof netmask));
175 if ((isnet = INET_resolve(netmask, &mask)) < 0) {
176 error_msg(_("can't resolve netmask %s"), netmask);
179 rt.rt_genmask = full_mask(mask);
184 if (strcmp(*args, "gw")==0 || strcmp(*args, "gateway")==0) {
188 if (rt.rt_flags & RTF_GATEWAY)
190 safe_strncpy(gateway, *args, (sizeof gateway));
191 if ((isnet = INET_resolve(gateway, &rt.rt_gateway)) < 0) {
192 error_msg(_("can't resolve gw %s"), gateway);
197 _("%s: cannot use a NETWORK as gateway!"),
201 rt.rt_flags |= RTF_GATEWAY;
206 if (strcmp(*args, "mss")==0) {
208 rt.rt_flags |= RTF_MSS;
211 rt.rt_mss = atoi(*args);
213 if (rt.rt_mss < 64 || rt.rt_mss > 32768) {
214 error_msg(_("Invalid MSS."));
220 if (strcmp(*args, "window")==0) {
224 rt.rt_flags |= RTF_WINDOW;
225 rt.rt_window = atoi(*args);
227 if (rt.rt_window < 128) {
228 error_msg(_("Invalid window."));
234 if (strcmp(*args, "irtt")==0) {
240 rt.rt_flags |= RTF_IRTT;
241 rt.rt_irtt = atoi(*(args - 1));
242 rt.rt_irtt *= (HZ / 100); /* FIXME */
243 #if 0 /* FIXME: do we need to check anything of this? */
244 if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) {
245 error_msg(_("Invalid initial rtt."));
250 ENOSUPP("inet_setroute", "RTF_IRTT"); /* XXX Fixme */
255 if (strcmp(*args, "reject")==0) {
258 rt.rt_flags |= RTF_REJECT;
260 ENOSUPP("inet_setroute", "RTF_REJECT"); /* XXX Fixme */
264 if (strcmp(*args, "mod")==0) {
266 rt.rt_flags |= RTF_MODIFIED;
269 if (strcmp(*args, "dyn")==0) {
271 rt.rt_flags |= RTF_DYNAMIC;
274 if (strcmp(*args, "reinstate")==0) {
276 rt.rt_flags |= RTF_REINSTATE;
279 if (strcmp(*args, "device")==0 || strcmp(*args, "dev")==0) {
281 if (rt.rt_dev || *args == NULL)
286 /* nothing matches */
290 show_usage(); /* must be last to catch typos */
297 if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev)
301 /* sanity checks.. */
302 if (mask_in_addr(rt)) {
303 unsigned long mask = mask_in_addr(rt);
305 if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) {
307 _("netmask %.8x doesn't make sense with host route"),
311 if (mask & (mask + 1)) {
312 error_msg(_("bogus netmask %s"), netmask);
315 mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr;
316 if (mask & ~mask_in_addr(rt)) {
317 error_msg(_("netmask doesn't match route address"));
321 /* Fill out netmask if still unset */
322 if ((action == RTACTION_ADD) && rt.rt_flags & RTF_HOST)
323 mask_in_addr(rt) = 0xffffffff;
325 /* Create a socket to the INET kernel. */
326 if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
330 /* Tell the kernel to accept this route. */
331 if (action == RTACTION_DEL) {
332 if (ioctl(skfd, SIOCDELRT, &rt) < 0) {
338 if (ioctl(skfd, SIOCADDRT, &rt) < 0) {
345 /* Close the socket. */
350 void displayroutes(void)
357 int flgs, ref, use, metric;
359 unsigned long int d,g,m;
361 char sdest[16], sgw[16];
364 FILE *fp = xfopen("/proc/net/route", "r");
366 while( fgets(buff, sizeof(buff), fp) != NULL ) {
369 while(buff[ifl]!=' ' && buff[ifl]!='\t' && buff[ifl]!='\0')
371 buff[ifl]=0; /* interface */
372 if(sscanf(buff+ifl+1, "%lx%lx%d%d%d%d%lx",
373 &d, &g, &flgs, &ref, &use, &metric, &m)!=7) {
374 error_msg_and_die( "Unsuported kernel route format\n");
377 printf("Kernel IP routing table\n"
378 "Destination Gateway Genmask Flags Metric Ref Use Iface\n");
382 ifl = 0; /* parse flags */
393 strcpy(sdest, (dest.s_addr==0 ? "default" :
395 strcpy(sgw, (gw.s_addr==0 ? "*" :
397 printf("%-15s %-15s %-15s %-5s %-6d %-2d %7d %s\n",
400 flags, metric, ref, use, buff);
406 int route_main(int argc, char **argv)
418 if (strcmp(*argv, "add")==0)
420 else if (strcmp(*argv, "del")==0 || strcmp(*argv, "delete")==0)
422 else if (strcmp(*argv, "flush")==0)
423 what = RTACTION_FLUSH;
428 return INET_setroute(what, 0, ++argv);