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[oweals/busybox.git] / ifconfig.c

diff --git a/ifconfig.c b/ifconfig.c
index 61d73f56bf925986713af9526b62e1487efc790d..7f3978a4a61917810e688927db7a3f695bca2d9c 100644 (file)
--- a/ifconfig.c
+++ b/ifconfig.c
@@ -15,7 +15,7 @@
  * Foundation;  either  version 2 of the License, or  (at
  * your option) any later version.
  *
- * $Id: ifconfig.c,v 1.10 2001/03/26 16:26:16 mjn3 Exp $
+ * $Id: ifconfig.c,v 1.11 2001/07/07 05:19:52 andersen Exp $
  *
  */
 
@@ -110,6 +110,8 @@
 #define A_NETMASK        0x20  /* Set if netmask (check for multiple sets). */
 #define A_SET_AFTER      0x40  /* Set a flag at the end. */
 #define A_COLON_CHK      0x80  /* Is this needed?  See below. */
+#define A_HOSTNAME      0x100  /* Set if it is ip addr. */
+#define A_BROADCAST     0x200  /* Set if it is broadcast addr. */
 
 /*
  * These defines are for dealing with the A_CAST_TYPE field.
@@ -139,12 +141,12 @@
 #define ARG_IRQ          (A_ARG_REQ | A_MAP_UCHAR)
 #define ARG_DSTADDR      (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE)
 #define ARG_NETMASK      (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_NETMASK)
-#define ARG_BROADCAST    (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
+#define ARG_BROADCAST    (A_ARG_REQ | A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_BROADCAST)
 #define ARG_HW           (A_ARG_REQ | A_CAST_HOST_COPY_IN_ETHER)
 #define ARG_POINTOPOINT  (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER)
 #define ARG_KEEPALIVE    (A_ARG_REQ | A_CAST_CHAR_PTR)
 #define ARG_OUTFILL      (A_ARG_REQ | A_CAST_CHAR_PTR)
-#define ARG_HOSTNAME     (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK)
+#define ARG_HOSTNAME     (A_CAST_HOST_COPY_RESOLVE | A_SET_AFTER | A_COLON_CHK | A_HOSTNAME)
 
 
 /*
@@ -160,7 +162,7 @@ struct arg1opt {
 struct options {
        const char *name;
        const unsigned char flags;
-       const unsigned char arg_flags;
+       const unsigned int arg_flags;
        const unsigned short selector;
 };
 
@@ -246,6 +248,7 @@ int ifconfig_main(int argc, char **argv)
 {
        struct ifreq ifr;
        struct sockaddr_in sai;
+       struct sockaddr_in sai_hostname, sai_netmask;
 #ifdef BB_FEATURE_IFCONFIG_HW
        struct sockaddr sa;
 #endif
@@ -256,8 +259,8 @@ int ifconfig_main(int argc, char **argv)
        int selector;
        char *p;
        char host[128];
-       unsigned char mask;
-       unsigned char did_flags;
+       unsigned int mask;
+       unsigned int did_flags;
 
        goterr = 0;
        did_flags = 0;
@@ -331,7 +334,7 @@ int ifconfig_main(int argc, char **argv)
                                }
                        } else {                        /* got an arg so process it */
                        HOSTNAME:
-                               did_flags |= (mask & A_NETMASK);
+                               did_flags |= (mask & (A_NETMASK|A_HOSTNAME));
                                if (mask & A_CAST_HOST_COPY) {
 #ifdef BB_FEATURE_IFCONFIG_HW
                                        if (mask & A_CAST_RESOLVE) {
@@ -342,11 +345,20 @@ int ifconfig_main(int argc, char **argv)
                                                if (!strcmp(host, "default")) {
                                                        /* Default is special, meaning 0.0.0.0. */
                                                        sai.sin_addr.s_addr = INADDR_ANY;
+                                               } else if ((!strcmp(host, "+")) && (mask & A_BROADCAST) &&
+                                                                (did_flags & (A_NETMASK|A_HOSTNAME))) {
+                                                       /* + is special, meaning broadcast is derived. */
+                                                       sai.sin_addr.s_addr = (~sai_netmask.sin_addr.s_addr) |
+                                                               (sai_hostname.sin_addr.s_addr & sai_netmask.sin_addr.s_addr);
                                                } else if (inet_aton(host, &sai.sin_addr) == 0) {
                                                        /* It's not a dotted quad. */
                                                        ++goterr;
                                                        continue;
                                                }
+                                               if(mask & A_HOSTNAME)
+                                                       sai_hostname = sai;
+                                               if(mask & A_NETMASK)
+                                                       sai_netmask = sai;
                                                p = (char *) &sai;
 #ifdef BB_FEATURE_IFCONFIG_HW
                                        } else { /* A_CAST_HOST_COPY_IN_ETHER */