[newlib-cygwin] tcp: socket option to get stack alias name

[newlib-cygwin] tcp: socket option to get stack alias name

[Sebastian Huber]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=73784208e3f457a5e2aea6016fbc29398be91574

commit 73784208e3f457a5e2aea6016fbc29398be91574
Author: Peter Lei <peterlei@netflix.com>
Date:   Mon Oct 25 20:08:54 2021 -0700

    tcp: socket option to get stack alias name
    
    TCP stack sysctl nodes are currently inserted using the stack
    name alias. Allow the user to get the current stack's alias to
    allow for programatic sysctl access.
    
    Obtained from:  Netflix

Diff:
---
 newlib/libc/sys/rtems/include/netinet/tcp.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/newlib/libc/sys/rtems/include/netinet/tcp.h b/newlib/libc/sys/rtems/include/netinet/tcp.h
index e7c47e85b..6dc7403aa 100644
--- a/newlib/libc/sys/rtems/include/netinet/tcp.h
+++ b/newlib/libc/sys/rtems/include/netinet/tcp.h
@@ -210,6 +210,7 @@ struct tcphdr {
 #define	TCP_PCAP_OUT	2048	/* number of output packets to keep */
 #define	TCP_PCAP_IN	4096	/* number of input packets to keep */
 #define TCP_FUNCTION_BLK 8192	/* Set the tcp function pointers to the specified stack */
+#define TCP_FUNCTION_ALIAS 8193	/* Get the current tcp function pointer name alias */
 /* Options for Rack and BBR */
 #define	TCP_REUSPORT_LB_NUMA   1026	/* set listen socket numa domain */
 #define TCP_RACK_MBUF_QUEUE   1050 /* Do we allow mbuf queuing if supported */