From: Andrei Tatar <andrei@unikraft.io>
Date: Mon, 5 Feb 2024 13:22:27 +0000 (+0100)
Subject: Expose LWIP_SO_RCVBUF config and set on by default
X-Git-Tag: RELEASE-0.16.2~5
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=0f14a50a1bd06547e64c862638ad57036a51acf6;p=unikraft%2Flibs%2Flwip.git

Expose LWIP_SO_RCVBUF config and set on by default

This change exposes the LWIP_SO_RCVBUF config option through the
Unikraft Kconfig, configuring whether lwip should use receive buffers.
Receive buffers enable support for the SO_RCVBUF socket option as
well as ioctl(FIONREAD).
This option is enabled by default to provide the most compatibility.

Signed-off-by: Andrei Tatar <andrei@unikraft.io>
Reviewed-by: Eduard Vintilă <eduard.vintila47@gmail.com>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
GitHub-Closes: #50
---

diff --git a/Config.uk b/Config.uk
index fd346c1..89de16c 100644
--- a/Config.uk
+++ b/Config.uk
@@ -182,6 +182,12 @@ config LWIP_NETIF_STATUS_PRINT
 	help
 		Print netif status changes to standard console
 
+config LWIP_RCVBUF
+	bool "Use receive buffers"
+	default y
+	help
+		Use receive buffers, enabling the SO_RCVBUF socket option and FIONREAD ioctl
+
 config LWIP_LOOPBACK
 	bool "Loopback traffic"
 	default y
diff --git a/include/lwipopts.h b/include/lwipopts.h
index 61d557e..efd5cdd 100644
--- a/include/lwipopts.h
+++ b/include/lwipopts.h
@@ -215,6 +215,10 @@ void sys_free(void *ptr);
 #define LWIP_SOCKET 0
 #endif
 
+#if CONFIG_LWIP_RCVBUF
+#define LWIP_SO_RCVBUF 1
+#endif
+
 #if LWIP_SOCKET
 #if CONFIG_HAVE_LIBC
 /* Stop lwip to provide ioctl constants */