Add in ifconfig and route

1 files changed, 372 insertions, 0 deletions

diff --git a/networking/route.c b/networking/route.c
new file mode 100644
index 0000000..76b2306
--- /dev/null
+++ b/networking/route.c
@@ -0,0 +1,372 @@
+/* route
+ *
+ * Similar to the standard Unix route, but with only the necessary
+ * parts for AF_INET
+ *
+ * Bjorn Wesen, Axis Communications AB
+ *
+ * Author of the original route: 
+ *              Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
+ *              (derived from FvK's 'route.c     1.70    01/04/94')
+ *
+ * This program is free software; you can redistribute it
+ * and/or  modify it under  the terms of  the GNU General
+ * Public  License as  published  by  the  Free  Software
+ * Foundation;  either  version 2 of the License, or  (at
+ * your option) any later version.
+ *
+ * $Id: route.c,v 1.1 2001/02/14 08:11:27 andersen Exp $
+ *
+ */
+
+#include "busybox.h"
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <net/route.h>
+#include <linux/param.h>  // HZ
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <unistd.h>
+#include <ctype.h>
+
+#define _(x) x
+
+#define RTACTION_ADD   1
+#define RTACTION_DEL   2
+#define RTACTION_HELP  3
+#define RTACTION_FLUSH 4
+#define RTACTION_SHOW  5
+
+#define E_NOTFOUND      8
+#define E_SOCK          7
+#define E_LOOKUP        6
+#define E_VERSION       5
+#define E_USAGE         4
+#define E_OPTERR        3
+#define E_INTERN        2
+#define E_NOSUPP        1
+
+/* resolve XXX.YYY.ZZZ.QQQ -> binary */
+
+static int
+INET_resolve(char *name, struct sockaddr *sa)
+{
+	struct sockaddr_in *sin = (struct sockaddr_in *)sa;
+	
+	sin->sin_family = AF_INET;
+	sin->sin_port = 0;
+
+	/* Default is special, meaning 0.0.0.0. */
+	if (!strcmp(name, "default")) {
+		sin->sin_addr.s_addr = INADDR_ANY;
+		return (1);
+	}
+	/* Look to see if it's a dotted quad. */
+	if (inet_aton(name, &sin->sin_addr)) {
+		return 0;
+	}
+	/* guess not.. */
+	return -1;
+}
+
+#if defined (SIOCADDRTOLD) || defined (RTF_IRTT)        /* route */
+#define HAVE_NEW_ADDRT 1
+#endif
+#ifdef RTF_IRTT                 /* route */
+#define HAVE_RTF_IRTT 1
+#endif
+#ifdef RTF_REJECT               /* route */
+#define HAVE_RTF_REJECT 1
+#endif
+
+#if HAVE_NEW_ADDRT
+#define mask_in_addr(x) (((struct sockaddr_in *)&((x).rt_genmask))->sin_addr.s_addr)
+#define full_mask(x) (x)
+#else
+#define mask_in_addr(x) ((x).rt_genmask)
+#define full_mask(x) (((struct sockaddr_in *)&(x))->sin_addr.s_addr)
+#endif
+
+/* add or delete a route depending on action */
+
+static int
+INET_setroute(int action, int options, char **args)
+{
+	struct rtentry rt;
+	char target[128], gateway[128] = "NONE", netmask[128] = "default";
+	int xflag, isnet;
+	int skfd;
+
+	xflag = 0;
+
+	if (!strcmp(*args, "-net")) {
+		xflag = 1;
+		args++;
+	} else if (!strcmp(*args, "-host")) {
+		xflag = 2;
+		args++;
+	}
+	if (*args == NULL)
+		usage(route_usage);
+
+	safe_strncpy(target, *args++, (sizeof target));
+
+	/* Clean out the RTREQ structure. */
+	memset((char *) &rt, 0, sizeof(struct rtentry));
+
+
+	if ((isnet = INET_resolve(target, &rt.rt_dst)) < 0) {
+		fprintf(stderr, "cant resolve %s\n", target);
+		return (1);
+	}
+
+	switch (xflag) {
+		case 1:
+			isnet = 1;
+			break;
+			
+		case 2:
+			isnet = 0;
+			break;
+			
+		default:
+			break;
+	}
+	
+	/* Fill in the other fields. */
+	rt.rt_flags = (RTF_UP | RTF_HOST);
+	if (isnet)
+		rt.rt_flags &= ~RTF_HOST;
+
+	while (*args) {
+		if (!strcmp(*args, "metric")) {
+			int metric;
+			
+			args++;
+			if (!*args || !isdigit(**args))
+				usage(route_usage);
+			metric = atoi(*args);
+#if HAVE_NEW_ADDRT
+			rt.rt_metric = metric + 1;
+#else
+			ENOSUPP("inet_setroute", "NEW_ADDRT (metric)");
+#endif
+			args++;
+			continue;
+		}
+
+		if (!strcmp(*args, "netmask")) {
+			struct sockaddr mask;
+			
+			args++;
+			if (!*args || mask_in_addr(rt))
+				usage(route_usage);
+			safe_strncpy(netmask, *args, (sizeof netmask));
+			if ((isnet = INET_resolve(netmask, &mask)) < 0) {
+				fprintf(stderr, "cant resolve netmask %s\n", netmask);
+				return (E_LOOKUP);
+			}
+			rt.rt_genmask = full_mask(mask);
+			args++;
+			continue;
+		}
+
+		if (!strcmp(*args, "gw") || !strcmp(*args, "gateway")) {
+			args++;
+			if (!*args)
+				usage(route_usage);
+			if (rt.rt_flags & RTF_GATEWAY)
+				usage(route_usage);
+			safe_strncpy(gateway, *args, (sizeof gateway));
+			if ((isnet = INET_resolve(gateway, &rt.rt_gateway)) < 0) {
+				fprintf(stderr, "cant resolve gw %s\n", gateway);
+				return (E_LOOKUP);
+			}
+			if (isnet) {
+				fprintf(stderr,
+					_("route: %s: cannot use a NETWORK as gateway!\n"),
+					gateway);
+				return (E_OPTERR);
+			}
+			rt.rt_flags |= RTF_GATEWAY;
+			args++;
+			continue;
+		}
+
+		if (!strcmp(*args, "mss")) {
+			args++;
+			rt.rt_flags |= RTF_MSS;
+			if (!*args)
+				usage(route_usage);
+			rt.rt_mss = atoi(*args);
+			args++;
+			if (rt.rt_mss < 64 || rt.rt_mss > 32768) {
+				fprintf(stderr, _("route: Invalid MSS.\n"));
+				return (E_OPTERR);
+			}
+			continue;
+		}
+
+		if (!strcmp(*args, "window")) {
+			args++;
+			if (!*args)
+				usage(route_usage);
+			rt.rt_flags |= RTF_WINDOW;
+			rt.rt_window = atoi(*args);
+			args++;
+			if (rt.rt_window < 128) {
+				fprintf(stderr, _("route: Invalid window.\n"));
+				return (E_OPTERR);
+			}
+			continue;
+		}
+
+		if (!strcmp(*args, "irtt")) {
+			args++;
+			if (!*args)
+				usage(route_usage);
+			args++;
+#if HAVE_RTF_IRTT
+			rt.rt_flags |= RTF_IRTT;
+			rt.rt_irtt = atoi(*(args - 1));
+			rt.rt_irtt *= (HZ / 100);	/* FIXME */
+#if 0				/* FIXME: do we need to check anything of this? */
+			if (rt.rt_irtt < 1 || rt.rt_irtt > (120 * HZ)) {
+				fprintf(stderr, _("route: Invalid initial rtt.\n"));
+				return (E_OPTERR);
+			}
+#endif
+#else
+			ENOSUPP("inet_setroute", "RTF_IRTT");
+#endif
+			continue;
+		}
+
+		if (!strcmp(*args, "reject")) {
+			args++;
+#if HAVE_RTF_REJECT
+			rt.rt_flags |= RTF_REJECT;
+#else
+			ENOSUPP("inet_setroute", "RTF_REJECT");
+#endif
+			continue;
+		}
+		if (!strcmp(*args, "mod")) {
+			args++;
+			rt.rt_flags |= RTF_MODIFIED;
+			continue;
+		}
+		if (!strcmp(*args, "dyn")) {
+			args++;
+			rt.rt_flags |= RTF_DYNAMIC;
+			continue;
+		}
+		if (!strcmp(*args, "reinstate")) {
+			args++;
+			rt.rt_flags |= RTF_REINSTATE;
+			continue;
+		}
+		if (!strcmp(*args, "device") || !strcmp(*args, "dev")) {
+			args++;
+			if (rt.rt_dev || *args == NULL)
+				usage(route_usage);
+			rt.rt_dev = *args++;
+			continue;
+		}
+		/* nothing matches */
+		if (!rt.rt_dev) {
+			rt.rt_dev = *args++;
+			if (*args)
+				usage(route_usage);	/* must be last to catch typos */
+		} else
+			usage(route_usage);
+	}
+
+#if HAVE_RTF_REJECT
+	if ((rt.rt_flags & RTF_REJECT) && !rt.rt_dev)
+		rt.rt_dev = "lo";
+#endif
+
+	/* sanity checks.. */
+	if (mask_in_addr(rt)) {
+		unsigned long mask = mask_in_addr(rt);
+		mask = ~ntohl(mask);
+		if ((rt.rt_flags & RTF_HOST) && mask != 0xffffffff) {
+			fprintf(stderr,
+				_("route: netmask %.8x doesn't make sense with host route\n"),
+				(unsigned int)mask);
+			return (E_OPTERR);
+		}
+		if (mask & (mask + 1)) {
+			fprintf(stderr, _("route: bogus netmask %s\n"), netmask);
+			return (E_OPTERR);
+		}
+		mask = ((struct sockaddr_in *) &rt.rt_dst)->sin_addr.s_addr;
+		if (mask & ~mask_in_addr(rt)) {
+			fprintf(stderr, _("route: netmask doesn't match route address\n"));
+			return (E_OPTERR);
+		}
+	}
+	/* Fill out netmask if still unset */
+	if ((action == RTACTION_ADD) && rt.rt_flags & RTF_HOST)
+		mask_in_addr(rt) = 0xffffffff;
+
+	/* Create a socket to the INET kernel. */
+	if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+		perror("socket");
+		return (E_SOCK);
+	}
+	/* Tell the kernel to accept this route. */
+	if (action == RTACTION_DEL) {
+		if (ioctl(skfd, SIOCDELRT, &rt) < 0) {
+			perror("SIOCDELRT");
+			close(skfd);
+			return (E_SOCK);
+		}
+	} else {
+		if (ioctl(skfd, SIOCADDRT, &rt) < 0) {
+			perror("SIOCADDRT");
+			close(skfd);
+			return (E_SOCK);
+		}
+	}
+	
+	/* Close the socket. */
+	(void) close(skfd);
+	return (0);
+}
+
+int route_main(int argc, char **argv)
+{
+	int what = 0;
+
+	argc--;
+	argv++;
+
+	if (*argv == NULL) {
+		//displayroutes();
+		fprintf(stderr, "print routes is not implemented yet\n");
+		usage(route_usage);
+	} else {
+		/* check verb */
+		if (!strcmp(*argv, "add"))
+			what = RTACTION_ADD;
+		else if (!strcmp(*argv, "del") || !strcmp(*argv, "delete"))
+			what = RTACTION_DEL;
+		else if (!strcmp(*argv, "flush"))
+			what = RTACTION_FLUSH;
+		else
+			usage(route_usage);
+	}
+
+	INET_setroute(what, 0, ++argv);
+
+	exit(0);
+}