diff --git a/src/apps/altcp_tls/altcp_tls_mbedtls.c b/src/apps/altcp_tls/altcp_tls_mbedtls.c
index d6ced89b..940d3e06 100644
--- a/src/apps/altcp_tls/altcp_tls_mbedtls.c
+++ b/src/apps/altcp_tls/altcp_tls_mbedtls.c
@@ -944,7 +944,8 @@ const struct altcp_functions altcp_mbedtls_functions = {
   altcp_default_setprio,
   altcp_mbedtls_dealloc,
   altcp_default_get_tcp_addrinfo,
-  altcp_default_get_ip
+  altcp_default_get_ip,
+  altcp_default_get_port
 #ifdef LWIP_DEBUG
   ,altcp_default_dbg_get_tcp_state
 #endif
diff --git a/src/core/altcp.c b/src/core/altcp.c
index 3e7fb9ff..0475828c 100644
--- a/src/core/altcp.c
+++ b/src/core/altcp.c
@@ -363,6 +363,15 @@ altcp_get_ip(struct altcp_pcb *conn, int local)
   return NULL;
 }
 
+u16_t
+altcp_get_port(struct altcp_pcb *conn, int local)
+{
+  if (conn && conn->fns && conn->fns->getport) {
+    return conn->fns->getport(conn, local);
+  }
+  return 0;
+}
+
 #ifdef LWIP_DEBUG
 enum tcp_state
 altcp_dbg_get_tcp_state(struct altcp_pcb *conn)
@@ -513,6 +522,14 @@ altcp_default_get_ip(struct altcp_pcb *conn, int local)
   return NULL;
 }
 
+u16_t
+altcp_default_get_port(struct altcp_pcb *conn, int local)
+{
+  if (conn && conn->inner_conn) {
+    return altcp_get_port(conn->inner_conn, local);
+  }
+  return 0;
+}
 
 #ifdef LWIP_DEBUG
 enum tcp_state
diff --git a/src/core/altcp_tcp.c b/src/core/altcp_tcp.c
index bc0ec94f..b330e17c 100644
--- a/src/core/altcp_tcp.c
+++ b/src/core/altcp_tcp.c
@@ -425,6 +425,23 @@ altcp_tcp_get_ip(struct altcp_pcb *conn, int local)
   return NULL;
 }
 
+static u16_t
+altcp_tcp_get_port(struct altcp_pcb *conn, int local)
+{
+  if (conn) {
+    struct tcp_pcb *pcb = (struct tcp_pcb *)conn->state;
+    ALTCP_TCP_ASSERT_CONN(conn);
+    if (pcb) {
+      if (local) {
+        return pcb->local_port;
+      } else {
+        return pcb->remote_port;
+      }
+    }
+  }
+  return 0;
+}
+
 #ifdef LWIP_DEBUG
 static enum tcp_state
 altcp_tcp_dbg_get_tcp_state(struct altcp_pcb *conn)
@@ -459,7 +476,8 @@ const struct altcp_functions altcp_tcp_functions = {
   altcp_tcp_setprio,
   altcp_tcp_dealloc,
   altcp_tcp_get_tcp_addrinfo,
-  altcp_tcp_get_ip
+  altcp_tcp_get_ip,
+  altcp_tcp_get_port
 #ifdef LWIP_DEBUG
   ,altcp_tcp_dbg_get_tcp_state
 #endif
diff --git a/src/include/lwip/altcp.h b/src/include/lwip/altcp.h
index 04f0a708..37c9c5d9 100644
--- a/src/include/lwip/altcp.h
+++ b/src/include/lwip/altcp.h
@@ -117,6 +117,7 @@ void  altcp_setprio(struct altcp_pcb *conn, u8_t prio);
 
 err_t altcp_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port);
 ip_addr_t *altcp_get_ip(struct altcp_pcb *conn, int local);
+u16_t altcp_get_port(struct altcp_pcb *conn, int local);
 
 #ifdef LWIP_DEBUG
 enum tcp_state altcp_dbg_get_tcp_state(struct altcp_pcb *conn);
diff --git a/src/include/lwip/priv/altcp_priv.h b/src/include/lwip/priv/altcp_priv.h
index c3ed1cbe..2d3b2fdb 100644
--- a/src/include/lwip/priv/altcp_priv.h
+++ b/src/include/lwip/priv/altcp_priv.h
@@ -83,6 +83,7 @@ typedef void  (*altcp_dealloc_fn)(struct altcp_pcb *conn);
 
 typedef err_t (*altcp_get_tcp_addrinfo_fn)(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port);
 typedef ip_addr_t *(*altcp_get_ip_fn)(struct altcp_pcb *conn, int local);
+typedef u16_t (*altcp_get_port_fn)(struct altcp_pcb *conn, int local);
 
 #ifdef LWIP_DEBUG
 typedef enum tcp_state (*altcp_dbg_get_tcp_state_fn)(struct altcp_pcb *conn);
@@ -109,6 +110,7 @@ struct altcp_functions {
   altcp_dealloc_fn            dealloc;
   altcp_get_tcp_addrinfo_fn   addrinfo;
   altcp_get_ip_fn             getip;
+  altcp_get_port_fn           getport;
 #ifdef LWIP_DEBUG
   altcp_dbg_get_tcp_state_fn  dbg_get_tcp_state;
 #endif
@@ -130,6 +132,7 @@ void  altcp_default_setprio(struct altcp_pcb *conn, u8_t prio);
 void  altcp_default_dealloc(struct altcp_pcb *conn);
 err_t altcp_default_get_tcp_addrinfo(struct altcp_pcb *conn, int local, ip_addr_t *addr, u16_t *port);
 ip_addr_t *altcp_default_get_ip(struct altcp_pcb *conn, int local);
+u16_t altcp_default_get_port(struct altcp_pcb *conn, int local);
 #ifdef LWIP_DEBUG
 enum tcp_state altcp_default_dbg_get_tcp_state(struct altcp_pcb *conn);
 #endif