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use a configure script test for PMTU discovery control instead of just assuming it's available on Linux

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git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@45027 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2006-10-13 15:41:14 +00:00
parent 3a602aa1d7
commit 1944a9a07c
4 changed files with 85 additions and 3 deletions
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72
configure vendored
View File

@@ -1,5 +1,5 @@
#! /bin/sh
# From configure.ac Revision: 43997 .
# From configure.ac Revision: 44055 .
# Guess values for system-dependent variables and create Makefiles.
# Generated by GNU Autoconf 2.60a.
#
@@ -14345,6 +14345,76 @@ echo "${ECHO_T}no" >&6; }
fi
rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
conftest$ac_exeext conftest.$ac_ext
{ echo "$as_me:$LINENO: checking for IP_MTU_DISCOVER" >&5
echo $ECHO_N "checking for IP_MTU_DISCOVER... $ECHO_C" >&6; }
cat >conftest.$ac_ext <<_ACEOF
/* confdefs.h. */
_ACEOF
cat confdefs.h >>conftest.$ac_ext
cat >>conftest.$ac_ext <<_ACEOF
/* end confdefs.h. */
#include <netinet/in.h>
int
main ()
{
int foo = IP_MTU_DISCOVER;
;
return 0;
}
_ACEOF
rm -f conftest.$ac_objext conftest$ac_exeext
if { (ac_try="$ac_link"
case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
(eval "$ac_link") 2>conftest.er1
ac_status=$?
grep -v '^ *+' conftest.er1 >conftest.err
rm -f conftest.er1
cat conftest.err >&5
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); } &&
{ ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err'
{ (case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
(eval "$ac_try") 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; } &&
{ ac_try='test -s conftest$ac_exeext'
{ (case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
(eval "$ac_try") 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
{ echo "$as_me:$LINENO: result: yes" >&5
echo "${ECHO_T}yes" >&6; }
cat >>confdefs.h <<\_ACEOF
#define HAVE_IP_MTU_DISCOVER 1
_ACEOF
else
echo "$as_me: failed program was:" >&5
sed 's/^/| /' conftest.$ac_ext >&5
{ echo "$as_me:$LINENO: result: no" >&5
echo "${ECHO_T}no" >&6; }
fi
rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
conftest$ac_exeext conftest.$ac_ext

9
configure.ac
View File

@@ -296,6 +296,15 @@ AC_LINK_IFELSE(
AC_MSG_RESULT(no)
)
AC_MSG_CHECKING(for IP_MTU_DISCOVER)
AC_LINK_IFELSE(
AC_LANG_PROGRAM([#include <netinet/in.h>],
[int foo = IP_MTU_DISCOVER;]),
AC_MSG_RESULT(yes)
AC_DEFINE([HAVE_IP_MTU_DISCOVER], 1, [Define to 1 if your system has PMTU discovery on UDP sockets.]),
AC_MSG_RESULT(no)
)
AC_CHECK_HEADER([libkern/OSAtomic.h],
[AC_DEFINE_UNQUOTED([HAVE_OSX_ATOMICS], 1, [Define to 1 if OSX atomic operations are supported.])])

3
include/asterisk/autoconfig.h.in
View File

@@ -148,6 +148,9 @@
/* Define to 1 if you have the <inttypes.h> header file. */
#undef HAVE_INTTYPES_H
/* Define to 1 if your system has PMTU discovery on UDP sockets. */
#undef HAVE_IP_MTU_DISCOVER
/* Define to 1 if you have the `isascii' function. */
#undef HAVE_ISASCII

4
main/utils.c
View File

@@ -987,10 +987,10 @@ int ast_dynamic_str_thread_build_va(struct ast_dynamic_str **buf, size_t max_len
void ast_enable_packet_fragmentation(int sock)
{
#ifdef __linux__
#if defined(HAVE_IP_MTU_DISCOVER)
int val = IP_PMTUDISC_DONT;
if (setsockopt(sock, IPPROTO_IP, IP_MTU_DISCOVER, &val, sizeof(val)))
ast_log(LOG_WARNING, "Unable to disable PMTU discovery. Large UDP packets may fail to be delivered when sent from this socket.\n");
#endif
#endif /* HAVE_IP_MTU_DISCOVER */
}