[lwip-devel] [bug #61666] A memory leak BUG in function tcp_input().

[xuyao hong]

Follow-up Comment #2, bug #61666 (project lwip):

//最终修复办法：
...

        if (recv_acked > 0) {
          u16_t acked16;
#if LWIP_WND_SCALE
          /* recv_acked is u32_t but the sent callback only takes a u16_t,
             so we might have to call it multiple times. */
          u32_t acked = recv_acked;
          while (acked > 0) {
            acked16 = (u16_t)LWIP_MIN(acked, 0xffffu);
            acked -= acked16;
#else
          {
            acked16 = recv_acked;
#endif
            TCP_EVENT_SENT(pcb, (u16_t)acked16, err);
            if (err == ERR_ABRT) {
              /* 若recv_data不为NULL则需要释放pbuf */
              if (recv_data != NULL) {
                pbuf_free(recv_data);
              }
              goto aborted;
            }
          }
          recv_acked = 0;
        }
        if (tcp_input_delayed_close(pcb)) {
          /* 若recv_data不为NULL则需要释放pbuf */
          if (recv_data != NULL) {
            pbuf_free(recv_data);
          }
          goto aborted;
        }

...

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