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AC_DEFUN([CHECK_DCCP],
[AC_MSG_CHECKING(for DCCP support)
AC_TRY_RUN( [#define MIN_REQUIRED_VERSION_MAJOR 3
#define MIN_REQUIRED_VERSION_MINOR 2
#define MIN_REQUIRED_VERSION_REV 0
#include <sys/utsname.h>
#include <sys/socket.h>
#include <string.h>
#include <stdlib.h>
#ifndef SOCK_DCCP
#define SOCK_DCCP 6
#endif
#ifndef IPPROTO_DCCP
#define IPPROTO_DCCP 33
#endif
int main()
{
int major, minor, rev;
struct utsname buf;
if(uname(&buf)<0){
return 1;
}
major=atoi((strtok(buf.release,".")));
minor=atoi((strtok(NULL,".")));
rev=atoi((strtok(NULL,".-")));
if (major > MIN_REQUIRED_VERSION_MAJOR)
{
/*Good Version*/
}
else
{
if (major == MIN_REQUIRED_VERSION_MAJOR &&
minor > MIN_REQUIRED_VERSION_MINOR)
{
/*Good Version*/
}
else
{
if (major == MIN_REQUIRED_VERSION_MAJOR &&
minor == MIN_REQUIRED_VERSION_MINOR &&
rev > MIN_REQUIRED_VERSION_REV)
{
/*Good Version*/
}
else
{
if (major == MIN_REQUIRED_VERSION_MAJOR &&
minor == MIN_REQUIRED_VERSION_MINOR &&
rev == MIN_REQUIRED_VERSION_REV)
{
/*Good Version*/
}
else
{
/*Invalid Version*/
return 1;
}
}
}
}
/*Confirm that DCCP module exists and can be loaded*/
if(socket(AF_INET, SOCK_DCCP, IPPROTO_DCCP)<0){
return 1;
}
return 0;
}],
[ AC_MSG_RESULT(yes)
AC_DEFINE([build_dccp],[1],[DCCP only supported on Linux >=3.2.0])],
[AC_MSG_RESULT(no)] )
]
)
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