fix(lwip): fix TCP pbuf memory leak

Disable TCP cache and retry function.

components/lwip/lwip/src/core/timeouts.c

@@ -427,8 +427,10 @@ again:
     return;
   }
 
+#if ESP_TCP
   extern void send_from_list();
   send_from_list();
+#endif
 
 #if ESP_UDP
   udp_sync_proc();

components/lwip/port/esp8266/freertos/heap.c

@@ -19,32 +19,12 @@
 #include "esp8266/eagle_soc.h"
 
 #ifdef ESP_LWIP
-/*
+#if MEMP_SIZE != 0
- * @brief allocate an only DRAM memory block for LWIP pbuf
+#error "MEMP_SIZE must be 0"
- * 
+#else /* MEMP_SIZE != 0 */
- * @param s memory size
+size_t memp_malloc_get_size(size_t type)
- * 
- * @return memory block pointer
- */
-void *mem_malloc_ll(size_t s)
 {
-    void *return_addr = (void *)__builtin_return_address(0);
+    return memp_pools[type]->size;
-
-    return _heap_caps_malloc(s, MALLOC_CAP_8BIT, return_addr, 0);
 }
-
+#endif /* MEMP_SIZE != 0 */
-void *memp_malloc_ll(size_t type)
+#endif /* ESP_LWIP */
-{
-    extern const struct memp_desc* const memp_pools[MEMP_MAX];
-
-    uint8_t *p;
-    const struct memp_desc *desc = memp_pools[type];
-
-    p = (uint8_t *)mem_malloc_ll(MEMP_SIZE + MEMP_ALIGN_SIZE(desc->size));
-    if (p)
-        p += MEMP_SIZE;
-
-    return p;
-}
-
-#endif

components/lwip/port/esp8266/include/lwipopts.h

@@ -213,6 +213,8 @@
 #define ESP_LWIP_MEM_DBG                    1
 #endif
 
+size_t memp_malloc_get_size(size_t type);
+
 /*
  * @brief allocate an only DRAM memory block for LWIP pbuf
  * 
@@ -220,7 +222,7 @@
  * 
  * @return memory block pointer
  */
-void *mem_malloc_ll(size_t s);
+#define mem_malloc_ll(s)         heap_caps_malloc(s, MALLOC_CAP_8BIT)
 
 /*
  * @brief allocate an only DRAM memory pool for LWIP pbuf
@@ -229,7 +231,7 @@ void *mem_malloc_ll(size_t s);
  * 
  * @return memory pool pointer
  */
-void *memp_malloc_ll(size_t type);
+#define memp_malloc_ll(type)     heap_caps_malloc(memp_malloc_get_size(type), MALLOC_CAP_8BIT)
 #endif
 
 /**

components/lwip/port/esp8266/netif/ethernetif.c

@@ -34,7 +34,7 @@ void wifi_station_set_default_hostname(uint8_t* hwaddr);
 #define IFNAME0 'e'
 #define IFNAME1 'n'
 
-
+#if ESP_TCP
 typedef struct pbuf_send_list {
     struct pbuf_send_list* next;
     struct pbuf* p;
@@ -44,8 +44,10 @@ typedef struct pbuf_send_list {
 
 static pbuf_send_list_t* pbuf_list_head = NULL;
 static int pbuf_send_list_num = 0;
+#endif
 static int low_level_send_cb(esp_aio_t* aio);
 
+#if ESP_TCP
 static inline bool check_pbuf_to_insert(struct pbuf* p)
 {
     uint8_t* buf = (uint8_t*)p->payload;
@@ -172,6 +174,7 @@ void send_from_list()
         }
     }
 }
+#endif
 
 /**
  * In this function, the hardware should be initialized.
@@ -213,6 +216,8 @@ static void low_level_init(struct netif* netif)
 static int low_level_send_cb(esp_aio_t* aio)
 {
     struct pbuf* pbuf = aio->arg;
+
+#if ESP_TCP
     wifi_tx_status_t* status = (wifi_tx_status_t*) & (aio->ret);
 
     if ((TX_STATUS_SUCCESS != status->wifi_tx_result) && check_pbuf_to_insert(pbuf)) {
@@ -235,6 +240,7 @@ static int low_level_send_cb(esp_aio_t* aio)
                                        status->wifi_tx_result, status->wifi_tx_lrc, status->wifi_tx_src, status->wifi_tx_rate));
         insert_to_list(aio->fd, aio->arg);
     }
+#endif
 
     pbuf_free(pbuf);
 
@@ -350,7 +356,9 @@ static int8_t low_level_output(struct netif* netif, struct pbuf* p)
 
     if (err != ERR_OK) {
         if (err == ERR_MEM) {
+#if ESP_TCP
             insert_to_list(aio.fd, p);
+#endif
             err = ERR_OK;
         }