xref: /third_party/lwip/0071-fix-pbuf-tot_len-incorrect-after-pbuf_split_64k-is-c.patch

From 339ad47548236f2b11ee6161a419db8aa664138c Mon Sep 17 00:00:00 2001
From: jiangheng <jiangheng14@huawei.com>
Date: Fri, 15 Sep 2023 09:33:56 +0800
Subject: [PATCH] fix pbuf->tot_len incorrect after pbuf_split_64k is called

---
 src/core/pbuf.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/core/pbuf.c b/src/core/pbuf.c
index 2385e57..8a55463 100644
--- a/src/core/pbuf.c
+++ b/src/core/pbuf.c
@@ -1194,7 +1194,7 @@ void pbuf_split_64k(struct pbuf *p, struct pbuf **rest)
     if (r != NULL) {
       /* Update the tot_len field in the first part */
       for (i = p; i != NULL; i = i->next) {
-        i->tot_len = tot_len_front;
+        i->tot_len = (u16_t)(i->tot_len - r->tot_len);
         LWIP_ASSERT("tot_len/len mismatch in last pbuf",
                     (i->next != NULL) || (i->tot_len == i->len));
       }
@@ -1205,9 +1205,6 @@ void pbuf_split_64k(struct pbuf *p, struct pbuf **rest)
       /* tot_len field in rest does not need modifications */
       /* reference counters do not need modifications */
       *rest = r;
-      r->tot_len = r->len;
-    }else{
-      p->tot_len = tot_len_front;
     }
   }
 }
-- 
2.27.0