diff --git a/src/core/ngx_inet.c b/src/core/ngx_inet.c
index cf4b8f6..32fc2c5 100644
--- a/src/core/ngx_inet.c
+++ b/src/core/ngx_inet.c
@@ -10,6 +10,9 @@
 #include <ngx_event_connect.h>
 
 
+static char *ngx_inet_parse_host_port(ngx_inet_upstream_t *u);
+
+
 /*
  * ngx_sock_ntop() and ngx_inet_ntop() may be implemented as
  * "ngx_sprintf(text, "%ud.%ud.%ud.%ud", p[0], p[1], p[2], p[3])", however,
@@ -223,10 +226,11 @@
 ngx_int_t
 ngx_parse_url(ngx_conf_t *cf, ngx_url_t *u)
 {
-    u_char              *p;
+    u_char              *p, *host;
     size_t               len;
     ngx_int_t            port;
     ngx_uint_t           i;
+    struct hostent      *h;
 #if (NGX_HAVE_UNIX_DOMAIN)
     struct sockaddr_un  *saun;
 #endif
@@ -390,6 +394,47 @@
 port:
 
     if (u->listen) {
+        if (u->portn == 0) {
+            if (u->default_portn == 0) {
+                u->err = "no port";
+                return NGX_ERROR;
+            }
+
+            u->portn = u->default_portn;
+        }
+
+        if (u->host.len == 1 && u->host.data[0] == '*') {
+            u->host.len = 0;
+        }
+
+        /* AF_INET only */
+
+        if (u->host.len) {
+
+           host = ngx_palloc(cf->temp_pool, u->host.len + 1);
+           if (host == NULL) {
+               return NGX_ERROR;
+           }
+
+           (void) ngx_cpystrn(host, u->host.data, u->host.len + 1);
+
+            u->addr.in_addr = inet_addr((const char *) host);
+
+            if (u->addr.in_addr == INADDR_NONE) {
+                h = gethostbyname((const char *) host);
+
+                if (h == NULL || h->h_addr_list[0] == NULL) {
+                    u->err = "host not found";
+                    return NGX_ERROR;
+                }
+
+                u->addr.in_addr = *(in_addr_t *)(h->h_addr_list[0]);
+            }
+
+        } else {
+            u->addr.in_addr = INADDR_ANY;
+        }
+
         return NGX_OK;
     }
 
@@ -737,7 +782,7 @@
 }
 
 
-char *
+static char *
 ngx_inet_parse_host_port(ngx_inet_upstream_t *u)
 {
     size_t      i;
diff --git a/src/core/ngx_inet.h b/src/core/ngx_inet.h
index 3014023..380ea50 100644
--- a/src/core/ngx_inet.h
+++ b/src/core/ngx_inet.h
@@ -17,8 +17,8 @@
 
 
 typedef struct {
-    in_addr_t  addr;
-    in_addr_t  mask;
+    in_addr_t           addr;
+    in_addr_t           mask;
 } ngx_inet_cidr_t;
 
 
@@ -57,53 +57,60 @@
 };
 
 
+typedef union {
+    in_addr_t           in_addr;
+} ngx_url_addr_t;
+
+
 typedef struct {
-    ngx_int_t     type;
+    ngx_int_t           type;
 
-    ngx_peers_t  *peers;
+    ngx_peers_t        *peers;
 
-    ngx_str_t     url;
-    ngx_str_t     host;
-    ngx_str_t     host_header;
-    ngx_str_t     port;
-    ngx_str_t     uri;
+    ngx_str_t           url;
+    ngx_str_t           host;
+    ngx_str_t           host_header;
+    ngx_str_t           port;
+    ngx_str_t           uri;
 
-    in_port_t     portn;
-    in_port_t     default_portn;
+    in_port_t           portn;
+    in_port_t           default_portn;
 
-    unsigned      listen:1;
-    unsigned      uri_part:1;
-    unsigned      upstream:1;
+    unsigned            listen:1;
+    unsigned            uri_part:1;
+    unsigned            upstream:1;
 
-    unsigned      default_port:1;
-    unsigned      wildcard:1;
+    unsigned            default_port:1;
+    unsigned            wildcard:1;
 
-    char         *err;
+    ngx_url_addr_t      addr;
+
+    char               *err;
 } ngx_url_t;
 
 
 typedef struct {
-    ngx_str_t     name;           /* "schema:host:port/uri" */
-    ngx_str_t     url;            /* "host:port/uri" */
-    ngx_str_t     host;
-    ngx_str_t     uri;
-    ngx_str_t     host_header;    /* "host:port" */
-    ngx_str_t     port_text;      /* "port" */
+    ngx_str_t           name;           /* "schema:host:port/uri" */
+    ngx_str_t           url;            /* "host:port/uri" */
+    ngx_str_t           host;
+    ngx_str_t           uri;
+    ngx_str_t           host_header;    /* "host:port" */
+    ngx_str_t           port_text;      /* "port" */
 
-    in_port_t     port;
+    in_port_t           port;
 
-    in_port_t     default_port_value;
+    in_port_t           default_port_value;
 
-    unsigned      default_port:1;
-    unsigned      wildcard:1;
+    unsigned            default_port:1;
+    unsigned            wildcard:1;
 
-    unsigned      uri_part:1;
-    unsigned      port_only:1;
+    unsigned            uri_part:1;
+    unsigned            port_only:1;
 } ngx_inet_upstream_t;
 
 
 size_t ngx_sock_ntop(int family, struct sockaddr *sa, u_char *text,
-                     size_t len);
+    size_t len);
 size_t ngx_inet_ntop(int family, void *addr, u_char *text, size_t len);
 
 ngx_int_t ngx_ptocidr(ngx_str_t *text, void *cidr);
@@ -111,7 +118,6 @@
 ngx_peers_t *ngx_inet_upstream_parse(ngx_conf_t *cf, ngx_inet_upstream_t *u);
 ngx_peers_t *ngx_inet_resolve_peer(ngx_conf_t *cf, ngx_str_t *name,
     in_port_t port);
-char *ngx_inet_parse_host_port(ngx_inet_upstream_t *u);
 ngx_int_t ngx_parse_url(ngx_conf_t *cf, ngx_url_t *u);
 
 
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index f70c988..adc751e 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -2371,12 +2371,10 @@
 {
     ngx_http_core_srv_conf_t *scf = conf;
 
-    char                 *err;
-    ngx_str_t            *value, size;
-    ngx_uint_t            n;
-    struct hostent       *h;
-    ngx_http_listen_t    *ls;
-    ngx_inet_upstream_t   inet_upstream;
+    ngx_str_t          *value, size;
+    ngx_url_t           u;
+    ngx_uint_t          n;
+    ngx_http_listen_t  *ls;
 
     /*
      * TODO: check duplicate 'listen' directives,
@@ -2385,17 +2383,19 @@
 
     value = cf->args->elts;
 
-    ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t));
+    ngx_memzero(&u, sizeof(ngx_url_t));
 
-    inet_upstream.url = value[1];
-    inet_upstream.port_only = 1;
+    u.url = value[1];
+    u.listen = 1;
+    u.default_portn = 80;
 
-    err = ngx_inet_parse_host_port(&inet_upstream);
+    if (ngx_parse_url(cf, &u) != NGX_OK) {
+        if (u.err) {
+            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                               "%s in \"%V\" of the \"listen\" directive",
+                               u.err, &u.url);
+        }
 
-    if (err) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "%s in \"%V\" of the \"listen\" directive",
-                           err, &inet_upstream.url);
         return NGX_CONF_ERROR;
     }
 
@@ -2407,41 +2407,14 @@
     ngx_memzero(ls, sizeof(ngx_http_listen_t));
 
     ls->family = AF_INET;
-    ls->port = (in_port_t) (inet_upstream.default_port ?
-                            80 : inet_upstream.port);
+    ls->addr = u.addr.in_addr;
+    ls->port = u.portn;
     ls->file_name = cf->conf_file->file.name;
     ls->line = cf->conf_file->line;
     ls->conf.backlog = -1;
     ls->conf.rcvbuf = -1;
     ls->conf.sndbuf = -1;
 
-    if (inet_upstream.host.len == 1 && inet_upstream.host.data[0] == '*') {
-        inet_upstream.host.len = 0;
-    }
-
-    if (inet_upstream.host.len) {
-        inet_upstream.host.data[inet_upstream.host.len] = '\0';
-
-        ls->addr = inet_addr((const char *) inet_upstream.host.data);
-
-        if (ls->addr == INADDR_NONE) {
-            h = gethostbyname((const char *) inet_upstream.host.data);
-
-            if (h == NULL || h->h_addr_list[0] == NULL) {
-                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                                   "can not resolve host \"%s\" "
-                                   "in the \"listen\" directive",
-                                   inet_upstream.host.data);
-                return NGX_CONF_ERROR;
-            }
-
-            ls->addr = *(in_addr_t *)(h->h_addr_list[0]);
-        }
-
-    } else {
-        ls->addr = INADDR_ANY;
-    }
-
     n = ngx_inet_ntop(AF_INET, &ls->addr, ls->conf.addr, INET_ADDRSTRLEN + 6);
     ngx_sprintf(&ls->conf.addr[n], ":%ui", ls->port);
 
diff --git a/src/imap/ngx_imap_core_module.c b/src/imap/ngx_imap_core_module.c
index 3ae370a..f6c4cc1 100644
--- a/src/imap/ngx_imap_core_module.c
+++ b/src/imap/ngx_imap_core_module.c
@@ -471,56 +471,27 @@
 static char *
 ngx_imap_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 {
-    char                       *err;
     ngx_str_t                  *value;
-    in_addr_t                   in_addr;
+    ngx_url_t                   u;
     ngx_uint_t                  i;
-    struct hostent             *h;
     ngx_imap_listen_t          *imls;
-    ngx_inet_upstream_t         inet_upstream;
     ngx_imap_core_main_conf_t  *cmcf;
 
     value = cf->args->elts;
 
-    ngx_memzero(&inet_upstream, sizeof(ngx_inet_upstream_t));
+    ngx_memzero(&u, sizeof(ngx_url_t));
 
-    inet_upstream.url = value[1];
-    inet_upstream.port_only = 1;
+    u.url = value[1];
+    u.listen = 1;
 
-    err = ngx_inet_parse_host_port(&inet_upstream);
-
-    if (err) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "%s in \"%V\" of the \"listen\" directive",
-                           err, &inet_upstream.url);
-        return NGX_CONF_ERROR;
-    }
-
-    if (inet_upstream.host.len == 1 && inet_upstream.host.data[0] == '*') {
-        inet_upstream.host.len = 0;
-    }
-
-    if (inet_upstream.host.len) {
-        inet_upstream.host.data[inet_upstream.host.len] = '\0';
-
-        in_addr = inet_addr((const char *) inet_upstream.host.data);
-
-        if (in_addr == INADDR_NONE) {
-            h = gethostbyname((const char *) inet_upstream.host.data);
-
-            if (h == NULL || h->h_addr_list[0] == NULL) {
-                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                                   "can not resolve host \"%s\" "
-                                   "in the \"listen\" directive",
-                                   inet_upstream.host.data);
-                return NGX_CONF_ERROR;
-            }
-
-            in_addr = *(in_addr_t *)(h->h_addr_list[0]);
+    if (ngx_parse_url(cf, &u) != NGX_OK) {
+        if (u.err) {
+            ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+                               "%s in \"%V\" of the \"listen\" directive",
+                               u.err, &u.url);
         }
 
-    } else {
-        in_addr = INADDR_ANY;
+        return NGX_CONF_ERROR;
     }
 
     cmcf = ngx_imap_conf_get_module_main_conf(cf, ngx_imap_core_module);
@@ -529,13 +500,12 @@
 
     for (i = 0; i < cmcf->listen.nelts; i++) {
 
-        if (imls[i].addr != in_addr || imls[i].port != inet_upstream.port) {
+        if (imls[i].addr != u.addr.in_addr || imls[i].port != u.portn) {
             continue;
         }
 
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "duplicate \"%V\" address and port pair",
-                           &inet_upstream.url);
+                           "duplicate \"%V\" address and port pair", &u.url);
         return NGX_CONF_ERROR;
     }
 
@@ -546,8 +516,8 @@
 
     ngx_memzero(imls, sizeof(ngx_imap_listen_t));
 
-    imls->addr = in_addr;
-    imls->port = inet_upstream.port;
+    imls->addr = u.addr.in_addr;
+    imls->port = u.portn;
     imls->family = AF_INET;
     imls->ctx = cf->ctx;