From 1e4e2fe5d7239da26edf89f554f929c10e0d5573 Mon Sep 17 00:00:00 2001
From: yangchen <yangchen145@huawei.com>
Date: Wed, 6 Mar 2024 18:25:19 +0800
Subject: [PATCH] support udp pkglen > mtu: modify netbuf_alloc size

---
 src/api/sockets.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/api/sockets.c b/src/api/sockets.c
index 923518c..66f6e2c 100644
--- a/src/api/sockets.c
+++ b/src/api/sockets.c
@@ -1891,7 +1891,13 @@ lwip_sendto(int s, const void *data, size_t size, int flags,
   /* make the buffer point to the data that should be sent */
 #if LWIP_NETIF_TX_SINGLE_PBUF
   /* Allocate a new netbuf and copy the data into it. */
+#if GAZELLE_ENABLE
+  /* In the gazelle scenario, only use buf.p->payload and buf.p->tot_len, and
+     buf.p->payload stores the sock pointer info. Don't need to alloc short_size */
+  if (netbuf_alloc(&buf, 0) == NULL) {
+#else
   if (netbuf_alloc(&buf, short_size) == NULL) {
+#endif
     err = ERR_MEM;
   } else {
 #if LWIP_CHECKSUM_ON_COPY
@@ -1905,6 +1911,7 @@ lwip_sendto(int s, const void *data, size_t size, int flags,
       /* In the gazelle scenario, the payload is stored in send_ring,
          and the payload stores the sock pointer information. */
       buf.p->payload = (void *)sock;
+      buf.p->tot_len = short_size;
 #else
       MEMCPY(buf.p->payload, data, short_size);
 #endif
-- 
2.33.0

