From d89924d80263ac63cd1edbba71710d7ddae83cb5 Mon Sep 17 00:00:00 2001
From: Jack Pappas <jackp@server.fake>
Date: Sat, 9 Feb 2013 21:40:48 -0500
Subject: [PATCH] Added checks for BSD-compliant protocol constants. Fixed the
 checks for a couple of Linux-specific constants so they work correctly (they
 included the wrong header). Added a check for the Linux-specific constant
 IP_PMTUDISC_DO; this'll be used with IP_MTU_DISCOVER in a future patch to
 make Linux sockets match BSD/OSX/Windows behavior.

---
 configure.in | 81 +++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 77 insertions(+), 4 deletions(-)

diff --git a/configure.in b/configure.in
index c6f3f3c010a..6f8db16e078 100644
--- a/configure.in
+++ b/configure.in
@@ -1226,6 +1226,51 @@ if test x$target_win32 = xno; then
 		AC_MSG_RESULT(no)
 	])
 
+	dnl *****************************
+	dnl *** Checks for IPPROTO_IP ***
+	dnl *****************************
+	AC_MSG_CHECKING(for IPPROTO_IP)
+	AC_TRY_COMPILE([#include <netinet/in.h>], [
+		int level = IPPROTO_IP;
+	], [
+		# Yes, we have it...
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_IPPROTO_IP, 1, [Have IPPROTO_IP])
+	], [
+		# We'll have to use getprotobyname
+		AC_MSG_RESULT(no)
+	])
+
+	dnl *******************************
+	dnl *** Checks for IPPROTO_IPV6 ***
+	dnl *******************************
+	AC_MSG_CHECKING(for IPPROTO_IPV6)
+	AC_TRY_COMPILE([#include <netinet/in.h>], [
+		int level = IPPROTO_IPV6;
+	], [
+		# Yes, we have it...
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_IPPROTO_IPV6, 1, [Have IPPROTO_IPV6])
+	], [
+		# We'll have to use getprotobyname
+		AC_MSG_RESULT(no)
+	])
+
+	dnl ******************************
+	dnl *** Checks for IPPROTO_TCP ***
+	dnl ******************************
+	AC_MSG_CHECKING(for IPPROTO_TCP)
+	AC_TRY_COMPILE([#include <netinet/in.h>], [
+		int level = IPPROTO_TCP;
+	], [
+		# Yes, we have it...
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_IPPROTO_TCP, 1, [Have IPPROTO_TCP])
+	], [
+		# We'll have to use getprotobyname
+		AC_MSG_RESULT(no)
+	])
+
 	dnl *****************************
 	dnl *** Checks for SOL_IP     ***
 	dnl *****************************
@@ -1275,7 +1320,7 @@ if test x$target_win32 = xno; then
 	dnl *** Checks for IP_PKTINFO ***
 	dnl *****************************
 	AC_MSG_CHECKING(for IP_PKTINFO)
-	AC_TRY_COMPILE([#include <netdb.h>], [
+	AC_TRY_COMPILE([#include <linux/in.h>], [
 		int level = IP_PKTINFO;
 	], [
 		# Yes, we have it...
@@ -1299,11 +1344,25 @@ if test x$target_win32 = xno; then
 		AC_MSG_RESULT(no)
 	])
 
+	dnl **********************************
+	dnl *** Checks for IP_DONTFRAG     ***
+	dnl **********************************
+	AC_MSG_CHECKING(for IP_DONTFRAG)
+	AC_TRY_COMPILE([#include <netinet/in.h>], [
+		int level = IP_DONTFRAG;
+	], [
+		# Yes, we have it...
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_IP_DONTFRAG, 1, [Have IP_DONTFRAG])
+	], [
+		AC_MSG_RESULT(no)
+	])
+
 	dnl **********************************
 	dnl *** Checks for IP_DONTFRAGMENT ***
 	dnl **********************************
 	AC_MSG_CHECKING(for IP_DONTFRAGMENT)
-	AC_TRY_COMPILE([#include <netdb.h>], [
+	AC_TRY_COMPILE([#include <Ws2ipdef.h>], [
 		int level = IP_DONTFRAGMENT;
 	], [
 		# Yes, we have it...
@@ -1317,7 +1376,7 @@ if test x$target_win32 = xno; then
 	dnl *** Checks for IP_MTU_DISCOVER ***
 	dnl **********************************
 	AC_MSG_CHECKING(for IP_MTU_DISCOVER)
-	AC_TRY_COMPILE([#include <netdb.h>], [
+	AC_TRY_COMPILE([#include <linux/in.h>], [
 		int level = IP_MTU_DISCOVER;
 	], [
 		# Yes, we have it...
@@ -1327,6 +1386,20 @@ if test x$target_win32 = xno; then
 		AC_MSG_RESULT(no)
 	])
 
+	dnl **********************************
+	dnl *** Checks for  IP_PMTUDISC_DO ***
+	dnl **********************************
+	AC_MSG_CHECKING(for IP_PMTUDISC_DO)
+	AC_TRY_COMPILE([#include <linux/in.h>], [
+		int level = IP_PMTUDISC_DO;
+	], [
+		# Yes, we have it...
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_IP_PMTUDISC_DO, 1, [Have IP_PMTUDISC_DO])
+	], [
+		AC_MSG_RESULT(no)
+	])
+
  	dnl *********************************
 	dnl *** Check for struct ip_mreqn ***
 	dnl *********************************
@@ -3454,4 +3527,4 @@ echo "
 "
 if test x$with_static_mono = xno -a "x$host_win32" != "xyes"; then
    AC_MSG_WARN(Turning off static Mono is a risk, you might run into unexpected bugs)
-fi
+fi
\ No newline at end of file
-- 
2.25.1