From 5b87c654e1b157b917399e88df4fbf2817672170 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Sat, 2 May 2020 02:09:10 +0200
Subject: [PATCH] Changed the packet structure's data field to a 65536-byte
 array to need less malloc'ing and free'ing, significantly reducing heap
 fragmentation.

---
 src/include/86box/network.h | 2 +-
 src/network/network.c       | 5 -----
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/src/include/86box/network.h b/src/include/86box/network.h
index 85b2d8276..f4e653a33 100644
--- a/src/include/86box/network.h
+++ b/src/include/86box/network.h
@@ -71,7 +71,7 @@ typedef int (*NETSETLINKSTATE)(void *);
 
 typedef struct netpkt {
     void		*priv;
-    uint8_t		*data;
+    uint8_t		data[65536];	/* Maximum length + 1 to round up to the nearest power of 2. */
     int			len;
 
     struct netpkt	*prev, *next;
diff --git a/src/network/network.c b/src/network/network.c
index de9c2ed1c..5f4c6dbaf 100644
--- a/src/network/network.c
+++ b/src/network/network.c
@@ -230,7 +230,6 @@ network_queue_put(int tx, void *priv, uint8_t *data, int len)
     temp = (netpkt_t *) malloc(sizeof(netpkt_t));
     memset(temp, 0, sizeof(netpkt_t));
     temp->priv = priv;
-    temp->data = (uint8_t *) malloc(len);
     memcpy(temp->data, data, len);
     temp->len = len;
     temp->prev = last_pkt[tx];
@@ -266,8 +265,6 @@ network_queue_advance(int tx)
 	return;
 
     first_pkt[tx] = temp->next;
-    if (temp->data != NULL)
-	free(temp->data);
     free(temp);
 
     if (first_pkt[tx] == NULL)
@@ -284,8 +281,6 @@ network_queue_clear(int tx)
 	return;
 
     do {
-	if (temp->data != NULL)
-		free(temp->data);
 	free(temp);
 	temp = temp->next;
     } while (temp != NULL);