auto import from //depot/cupcake/@135843

1 files changed, 139 insertions, 0 deletions

diff --git a/toolbox/ifconfig.c b/toolbox/ifconfig.c
new file mode 100644
index 0000000..e83cd8b
--- /dev/null
+++ b/toolbox/ifconfig.c
@@ -0,0 +1,139 @@
+
+#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>
+
+static void die(const char *s)
+{
+    fprintf(stderr,"error: %s (%s)\n", s, strerror(errno));
+    exit(-1);
+}
+
+static void setflags(int s, struct ifreq *ifr, int set, int clr)
+{
+    if(ioctl(s, SIOCGIFFLAGS, ifr) < 0) die("SIOCGIFFLAGS");
+    ifr->ifr_flags = (ifr->ifr_flags & (~clr)) | set;
+    if(ioctl(s, SIOCSIFFLAGS, ifr) < 0) die("SIOCSIFFLAGS");
+}
+
+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);
+}
+
+static void setnetmask(int s, struct ifreq *ifr, const char *addr)
+{
+	init_sockaddr_in((struct sockaddr_in *) &ifr->ifr_netmask, addr);
+    if(ioctl(s, SIOCSIFNETMASK, ifr) < 0) die("SIOCSIFNETMASK");
+}
+
+static void setaddr(int s, struct ifreq *ifr, const char *addr)
+{
+	init_sockaddr_in((struct sockaddr_in *) &ifr->ifr_addr, addr);
+    if(ioctl(s, SIOCSIFADDR, ifr) < 0) die("SIOCSIFADDR");
+}
+
+int ifconfig_main(int argc, char *argv[])
+{
+    struct ifreq ifr;
+    int s;
+    unsigned int addr, mask, flags;
+    char astring[20];
+    char mstring[20];
+    char *updown, *brdcst, *loopbk, *ppp, *running, *multi;
+    
+    argc--;
+    argv++;
+
+    if(argc == 0) return 0;
+
+    memset(&ifr, 0, sizeof(struct ifreq));
+    strncpy(ifr.ifr_name, argv[0], IFNAMSIZ);
+    ifr.ifr_name[IFNAMSIZ-1] = 0;
+    argc--, argv++;
+
+    if((s = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
+        die("cannot open control socket\n");
+    }
+
+    if (argc == 0) {
+        if (ioctl(s, SIOCGIFADDR, &ifr) < 0) {
+            perror(ifr.ifr_name);
+            return -1;
+        } else
+            addr = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
+
+        if (ioctl(s, SIOCGIFNETMASK, &ifr) < 0) {
+            perror(ifr.ifr_name);
+            return -1;
+        } else
+            mask = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr.s_addr;
+
+        if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
+            perror(ifr.ifr_name);
+            return -1;
+        } else
+            flags = ifr.ifr_flags;
+
+        sprintf(astring, "%d.%d.%d.%d",
+                addr & 0xff,
+                ((addr >> 8) & 0xff),
+                ((addr >> 16) & 0xff),
+                ((addr >> 24) & 0xff));
+        sprintf(mstring, "%d.%d.%d.%d",
+                mask & 0xff,
+                ((mask >> 8) & 0xff),
+                ((mask >> 16) & 0xff),
+                ((mask >> 24) & 0xff));
+        printf("%s: ip %s mask %s flags [", ifr.ifr_name,
+               astring,
+               mstring
+               );
+
+        updown =  (flags & IFF_UP)           ? "up" : "down";
+        brdcst =  (flags & IFF_BROADCAST)    ? " broadcast" : "";
+        loopbk =  (flags & IFF_LOOPBACK)     ? " loopback" : "";
+        ppp =     (flags & IFF_POINTOPOINT)  ? " point-to-point" : "";
+        running = (flags & IFF_RUNNING)      ? " running" : "";
+        multi =   (flags & IFF_MULTICAST)    ? " multicast" : "";
+        printf("%s%s%s%s%s%s]\n", updown, brdcst, loopbk, ppp, running, multi);
+
+
+
+/*    char *updown, *brdcst, *loopbk, *ppp, *running, *multi; */
+
+        return 0;
+    }
+    
+    while(argc > 0){
+        if(!strcmp(argv[0], "up")) {
+            setflags(s, &ifr, IFF_UP, 0);
+        } else if(!strcmp(argv[0], "down")) {
+            setflags(s, &ifr, 0, IFF_UP);
+		} else if(!strcmp(argv[0], "netmask")) {
+			argc--, argv++;
+			if (0 == argc) { 
+				errno = EINVAL;
+				die("expecting an IP address for parameter \"netmask\"");
+			}
+			setnetmask(s, &ifr, argv[0]);
+        } else if(isdigit(argv[0][0])){
+            setaddr(s, &ifr, argv[0]);
+        }
+        argc--, argv++;
+    }
+
+    return 0;
+}