gh-124944: Add socket.SO_ORIGINAL_DST (#124945)

Author: Stevenjin8

Misc/NEWS.d/next/Library/2024-10-03-17-13-22.gh-issue-124944.YyLAzf.rst

@@ -0,0 +1 @@
+Add ``SO_ORIGINAL_DST`` to the :mod:`socket` module.

Modules/socketmodule.c

@@ -7921,6 +7921,9 @@ socket_exec(PyObject *m)
 #ifdef  SO_OOBINLINE
     ADD_INT_MACRO(m, SO_OOBINLINE);
 #endif
+#ifdef  SO_ORIGINAL_DST
+    ADD_INT_MACRO(m, SO_ORIGINAL_DST);
+#endif
 #ifndef __GNU__
 #ifdef  SO_REUSEPORT
     ADD_INT_MACRO(m, SO_REUSEPORT);

Modules/socketmodule.h

@@ -172,6 +172,10 @@ typedef int socklen_t;
 # undef AF_VSOCK
 #endif
 
+#ifdef HAVE_LINUX_NETFILTER_IPV4_H
+# include <linux/netfilter_ipv4.h>
+#endif
+
 #ifdef HAVE_SOCKADDR_ALG
 
 # include <linux/if_alg.h>

configure

@@ -3013,7 +3013,7 @@ AC_DEFINE([STDC_HEADERS], [1],
 AC_CHECK_HEADERS([ \
   alloca.h asm/types.h bluetooth.h conio.h direct.h dlfcn.h endian.h errno.h fcntl.h grp.h \
   io.h langinfo.h libintl.h libutil.h linux/auxvec.h sys/auxv.h linux/fs.h linux/limits.h linux/memfd.h \
-  linux/random.h linux/soundcard.h \
+  linux/netfilter_ipv4.h linux/random.h linux/soundcard.h \
   linux/tipc.h linux/wait.h netdb.h net/ethernet.h netinet/in.h netpacket/packet.h poll.h process.h pthread.h pty.h \
   sched.h setjmp.h shadow.h signal.h spawn.h stropts.h sys/audioio.h sys/bsdtty.h sys/devpoll.h \
   sys/endian.h sys/epoll.h sys/event.h sys/eventfd.h sys/file.h sys/ioctl.h sys/kern_control.h \

configure.ac

@@ -739,6 +739,9 @@
 /* Define to 1 if you have the <linux/memfd.h> header file. */
 #undef HAVE_LINUX_MEMFD_H
 
+/* Define to 1 if you have the <linux/netfilter_ipv4.h> header file. */
+#undef HAVE_LINUX_NETFILTER_IPV4_H
+
 /* Define to 1 if you have the <linux/netlink.h> header file. */
 #undef HAVE_LINUX_NETLINK_H