hostapd: Make it possible to remove addresses from maclists

It is already possible to add MAC addresses at runtime. This patch
allows also to remove some of them by using the prefix "-" in the
address file.

Signed-off-by: Emanuel Taube <emanuel.taube@gmail.com>

diff --git a/hostapd/config_file.c b/hostapd/config_file.c
index 2beb34c..a889dca 100644 (file)
--- a/hostapd/config_file.c
+++ b/hostapd/config_file.c
@@ -129,6 +129,8 @@ static int hostapd_config_read_maclist(const char *fname,
        }
 
        while (fgets(buf, sizeof(buf), f)) {
+               int i, rem = 0;
+
                line++;
 
                if (buf[0] == '#')
@@ -143,14 +145,32 @@ static int hostapd_config_read_maclist(const char *fname,
                }
                if (buf[0] == '\0')
                        continue;
+               pos = buf;
+               if (buf[0] == '-') {
+                       rem = 1;
+                       pos++;
+               }
 
-               if (hwaddr_aton(buf, addr)) {
+               if (hwaddr_aton(pos, addr)) {
                        wpa_printf(MSG_ERROR, "Invalid MAC address '%s' at "
-                                  "line %d in '%s'", buf, line, fname);
+                                  "line %d in '%s'", pos, line, fname);
                        fclose(f);
                        return -1;
                }
 
+               if (rem) {
+                       i = 0;
+                       while (i < *num) {
+                               if (os_memcmp((*acl)[i].addr, addr, ETH_ALEN) ==
+                                   0) {
+                                       os_remove_in_array(*acl, *num,
+                                                          sizeof(**acl), i);
+                                       (*num)--;
+                               } else
+                                       i++;
+                       }
+                       continue;
+               }
                vlan_id = 0;
                pos = buf;
                while (*pos != '\0' && *pos != ' ' && *pos != '\t')