From 4f6e8d7a00cbeda1e70cc15be9c4af1018bdad53 Mon Sep 17 00:00:00 2001
From: The Android Open Source Project <initial-contribution@android.com>
Date: Tue, 21 Oct 2008 07:00:00 -0700
Subject: Initial Contribution

---
 toolbox/route.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 toolbox/route.c

(limited to 'toolbox/route.c')

diff --git a/toolbox/route.c b/toolbox/route.c
new file mode 100644
index 0000000..adf5c69
--- /dev/null
+++ b/toolbox/route.c
@@ -0,0 +1,97 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <errno.h>
+#include <string.h>
+#include <ctype.h>
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <linux/if.h>
+#include <linux/sockios.h>
+#include <arpa/inet.h>
+#include <linux/route.h>
+
+static void die(const char *s)
+{
+    fprintf(stderr,"error: %s (%s)\n", s, strerror(errno));
+    exit(-1);
+}
+
+static inline void init_sockaddr_in(struct sockaddr_in *sin, const char *addr)
+{
+	sin->sin_family = AF_INET;
+	sin->sin_port = 0;
+	sin->sin_addr.s_addr = inet_addr(addr);
+}
+
+#define ADVANCE(argc, argv) do { argc--, argv++; } while(0)
+#define EXPECT_NEXT(argc, argv) do {        \
+    ADVANCE(argc, argv);                    \
+	if (0 == argc) {  						\
+		errno = EINVAL;                     \
+		die("expecting one more argument"); \
+	}                                       \
+} while(0)		
+
+/* current support two kinds of usage */
+/* route add default dev wlan0 */
+/* route add default gw 192.168.20.1 dev wlan0 */
+
+int route_main(int argc, char *argv[])
+{
+    struct ifreq ifr;
+    int s,i;
+	struct rtentry rt;
+	struct sockaddr_in ina;
+   
+    if(argc == 0) return 0;
+    
+    strncpy(ifr.ifr_name, argv[0], IFNAMSIZ);
+    ifr.ifr_name[IFNAMSIZ-1] = 0;
+	ADVANCE(argc, argv);
+
+    if((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+        die("cannot open control socket\n");
+    }
+
+    while(argc > 0){
+        if(!strcmp(argv[0], "add")) {
+			EXPECT_NEXT(argc, argv);
+			if(!strcmp(argv[0], "default")) {
+				EXPECT_NEXT(argc, argv);
+				memset((char *) &rt, 0, sizeof(struct rtentry));
+				rt.rt_dst.sa_family = AF_INET;	
+				if(!strcmp(argv[0], "dev")) {
+				  EXPECT_NEXT(argc, argv);
+				  rt.rt_flags = RTF_UP | RTF_HOST;
+				  rt.rt_dev = argv[0];
+				  if (ioctl(s, SIOCADDRT, &rt) < 0) die("SIOCADDRT");
+				}else if(!strcmp(argv[0], "gw")) {
+				  EXPECT_NEXT(argc, argv);
+				  rt.rt_flags = RTF_UP | RTF_GATEWAY;
+				  init_sockaddr_in((struct sockaddr_in *)&(rt.rt_genmask), "0.0.0.0");
+				  if(isdigit(argv[0][0])){
+					init_sockaddr_in((struct sockaddr_in *)&(rt.rt_gateway), argv[0]);
+				  }else{
+					die("expecting an IP address for parameter \"gw\"");
+				  }
+				  EXPECT_NEXT(argc, argv);
+				  if(!strcmp(argv[0], "dev")) {
+					EXPECT_NEXT(argc, argv);
+					rt.rt_dev = argv[0];
+					if (ioctl(s, SIOCADDRT, &rt) < 0){
+					  die("SIOCADDRT");
+					}
+				  }
+				}
+			}
+        }
+		ADVANCE(argc, argv);
+    }
+
+    return 0;
+}
+
-- 
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