Close lwIP sockets correctly.

ad8d4f37 · Silas Boyd-Wickizer · f2afe63f · ad8d4f37 · ad8d4f37
--- a/file.c
+++ b/file.c
@@ -30,13 +30,19 @@ filedup(struct file *f)
 void
 fileclose(struct file *f)
 {
-  if (__sync_sub_and_fetch(&f->ref, 1) > 0)
+  extern void netclose(int sock);
+  if (subfetch(&f->ref, 1) > 0)
    return;
  if(f->type == FD_PIPE)
    pipeclose(f->pipe, f->writable);
  else if(f->type == FD_INODE)
    iput(f->ip);
+  else if(f->type == FD_SOCKET)
+    netclose(f->socket);
+  else
+    panic("fileclose bad type");
  kmfree(f);
 }

--- a/net.c
+++ b/net.c
@@ -261,6 +261,12 @@ netaccept(int sock, void *xaddr, void *xaddrlen)
  return ss;
 }
+void
+netclose(int sock)
+{
+  lwip_close(sock);
+}
 #else
 void