diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
index 9f593f0..fd67b76 100644
--- a/src/core/ngx_inet.c
+++ b/src/core/ngx_inet.c
@@ -3,14 +3,62 @@
 #include <ngx_core.h>
 
 
+ngx_inline static size_t ngx_sprint_uchar(u_char *text, u_char c, size_t len)
+{
+    size_t      n;
+    ngx_uint_t  c1, c2;
+
+    n = 0;
+
+    if (len == n) {
+        return n;
+    }
+
+    c1 = c / 100;
+
+    if (c1) {
+        *text++ = (u_char) (c1 + '0');
+        n++;
+
+        if (len == n) {
+            return n;
+        }
+    }
+
+    c2 = (c % 100) / 10;
+
+    if (c1 || c2) {
+        *text++ = (u_char) (c2 + '0');
+        n++;
+
+        if (len == n) {
+            return n;
+        }
+    }
+
+    c2 = c % 10;
+
+    *text++ = (u_char) (c2 + '0');
+    n++;
+
+    return n;
+}
+
+
 /* AF_INET only */
 
 size_t ngx_sock_ntop(int family, struct sockaddr *addr, u_char *text,
                      size_t len)
 {
     u_char              *p;
+    size_t               n;
+    ngx_uint_t           i;
     struct sockaddr_in  *addr_in;
 
+    if (len == 0) {
+        return 0;
+    }
+
     if (family != AF_INET) {
         return 0;
     }
@@ -18,19 +66,101 @@
     addr_in = (struct sockaddr_in *) addr;
     p = (u_char *) &addr_in->sin_addr;
 
+    if (len > INET_ADDRSTRLEN) {
+        len = INET_ADDRSTRLEN;
+    }
+
+    n = ngx_sprint_uchar(text, p[0], len);
+
+    i = 1;
+
+    do {
+        if (len == n) {
+            text[n - 1] = '\0';
+            return n;
+        }
+
+        text[n++] = '.';
+
+        if (len == n) {
+            text[n - 1] = '\0';
+            return n;
+        }
+
+        n += ngx_sprint_uchar(&text[n], p[i++], len - n);
+
+    } while (i < 4);
+
+    if (len == n) {
+        text[n] = '\0';
+        return n;
+    }
+
+    text[n] = '\0';
+
+    return n;
+
+#if 0
     return ngx_snprintf((char *) text,
                         len > INET_ADDRSTRLEN ? INET_ADDRSTRLEN : len,
                         "%u.%u.%u.%u", p[0], p[1], p[2], p[3]);
+#endif
 }
 
 
-size_t ngx_inet_ntop(int family, u_char *addr, u_char *text, size_t len)
+size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len)
 {
+    u_char      *p;
+    size_t       n;
+    ngx_uint_t   i;
+
+    if (len == 0) {
+        return 0;
+    }
+
     if (family != AF_INET) {
         return 0;
     }
 
+    p = (u_char *) addr;
+
+    if (len > INET_ADDRSTRLEN) {
+        len = INET_ADDRSTRLEN;
+    }
+
+    n = ngx_sprint_uchar(text, p[0], len);
+
+    i = 1;
+
+    do {
+        if (len == n) {
+            text[n - 1] = '\0';
+            return n;
+        }
+
+        text[n++] = '.';
+
+        if (len == n) {
+            text[n - 1] = '\0';
+            return n;
+        }
+
+        n += ngx_sprint_uchar(&text[n], p[i++], len - n);
+
+    } while (i < 4);
+
+    if (len == n) {
+        text[n] = '\0';
+        return n;
+    }
+
+    text[n] = '\0';
+
+    return n;
+
+#if 0
     return ngx_snprintf((char *) text,
                         len > INET_ADDRSTRLEN ? INET_ADDRSTRLEN : len,
-                        "%u.%u.%u.%u", addr[0], addr[1], addr[2], addr[3]);
+                        "%u.%u.%u.%u", p[0], p[1], p[2], p[3]);
+#endif
 }