1 files changed, 25 insertions, 3 deletions
diff --git a/src/util.c b/src/util.c
index 9b6061f..b6d4e14 100644
--- a/src/util.c
+++ b/src/util.c
@@ -28,6 +28,7 @@
 #include <libdaemon/dlog.h>
 
 #include "util.h"
+#include "iwapi.h"
 
 struct hw_addr null_ap = { { 0, 0, 0, 0, 0, 0 } };
 
@@ -38,11 +39,11 @@ void print_hex(FILE *f, uint8_t *w, int l) {
     }
 }
 
-int hw_addr_equal(struct hw_addr *a, struct hw_addr *b) {
+int hw_addr_equal(const struct hw_addr *a, const struct hw_addr *b) {
     return memcmp(a->addr, b->addr, ETH_ALEN) == 0;
 }
 
-int is_assoc_ap(struct hw_addr *ap) {
+int is_assoc_ap(const struct hw_addr *ap) {
     int b, j;
     b = 1;
     assert(ap);
@@ -134,7 +135,7 @@ int get_ifname(int idx, char *p, int l) {
     return 0;
 }
 
-int is_iface_available(char *p) {
+int is_iface_available(const char *p) {
     struct ifreq req;
     int s, r;
 
@@ -154,3 +155,24 @@ int is_iface_available(char *p) {
     close(s);
     return r >= 0 && req.ifr_ifindex >= 0;
 }
+
+const char* escape_essid(const char *s) {
+    static const char hextab[] = "0123456789ABCDEF";
+    static char output[3*IW_ESSID_MAX_SIZE + 1];
+    const char *i;
+    char *o;
+
+    for (i = s, o = output; i-s < IW_ESSID_MAX_SIZE && *i; i++) {
+
+        if (*i >= 32 && *i < 126 && *i != '/' && *i != '%') {
+            *(o++) = '%';
+            *(o++) = hextab[*i >> 4];
+            *(o++) = hextab[*i & 0xF];
+        } else
+            *(o++) = *i;
+    }
+
+    *(o++) = 0;
+    
+    return output;
+}