configure

#!/bin/sh
#
# --enable-broken-crc:
#   If your RP is buggy cisco PIM-SMv2 implementation that computes
#   the PIM-Register checksum over the whole pkt instead only over
#   the header, you need to define this. Otherwise, all your PIM-Register
#   may be dropped by the cisco-RP.
#DEFS += -DBROKEN_CISCO_CHECKSUM
#
# --enable-kernel-encap:
#   Register kernel encapsulation.  Your kernel must support registers
#   kernel encapsulation to be able to use it.
#DEFS += -DPIM_REG_KERNEL_ENCAP
#
# --enable-kernel-mfc:
#   (*,G) kernel MFC support.  Use it ONLY with (*,G) capable kernel
#DEFS += -DKERNEL_MFC_WC_G
#
# --enable-memory-save:
#   Saves 4 bytes per unconfigured interface per routing entry.  If set,
#   configuring such interface will restart the daemon and will flush
#   the routing table.
#DEFS += -DSAVE_MEMORY
#
# --enable-scoped-acls:
#   Scoped access control list support in pimd.conf.  If you want to
#   install NUL OIF for the "scoped groups", use the following syntax:
#   "phyint IFNAME [scoped <MCAST_ADDR> masklen <PREFIX_LEN>]", e.g.
#      phyint fxp0 scoped "addr" masklen "len"
#   Support contributed by Marian Stagarescu <marian@cidera.com>
#DEFS += -DSCOPED_ACL
#

OS=`uname`
CFG=config.mk
TMP=`mktemp`

heading()
{
        echo "# This makefile snippet is generated by the pimd configure script." > $CFG
        echo >> $CFG
        echo "# Initial definitions ..." >> $CFG
        echo "# -D_GNU_SOURCE Use GNU extensions, where possible" >> $CFG
        echo "# -D_BSD_SOURCE Use functions derived from 4.3 BSD Unix rather than POSIX.1" >> $CFG
        echo "# -DPIM         Enable PIM extensions in RSRR" >> $CFG
        echo "DEFS          = -D_BSD_SOURCE -D_GNU_SOURCE -DPIM" >> $CFG
        echo "# EXTRA_OBJS  = For locally provided objects missing on some platforms, e.g., strlcpy.o"  >> $CFG
        echo "# EXTRA_LIBS  = For platform specific libraries, e.g., -lutil" >> $CFG
        echo >> $CFG
        echo "# $OS specific settings ..." >> $CFG
}

usage()
{
        echo "Run this script to configure pimd for your operating system."
        echo
        echo "Usage: $0 [ARG]"
        echo
        echo "  --enable-broken-crc    Interop with older broken Cisco firmware that did the"
        echo "                         checksum in PIM Register messages slightly wrong."
        echo "                         Should not be needed anymore."
        echo "  --enable-kernel-encap  Some kernels can do the PIM Register encapsulation by"
        echo "                         themselves, this speeds up processing considerably."
        echo "                         Only enable this if your kernel supports it."
        echo "  --enable-kernel-mfc    Some specialized kernels may have (*,G) MFC support."
        echo "                         Only enable this if your kernel supports it."
        echo "  --enable-memory-save   Save 4 bytes per unconfigured interface per routing"
        echo "                         entry.  Must restart pimd and cause routing table to"
        echo "                         be flushed when configuring new interfaces."
        echo "  --enable-scoped-acls   Scoped access control list support in pimd.conf, as"
        echo "                         phyint IFNAME [scoped <MCGROUP> masklen <LEN>], e.g."
        echo "                         phyint fxp0 scoped 239.0.0.0 masklen 8"
        echo "  --enable-rsrr          Routing Support for Resource Reservations, currently"
        echo "                         used by RSVP.  EXPERIMENTAL"
        echo "  --with-includes=PATH   Use this if the multicast header files are not in the"
        echo "                         standard location on your system. E.g., /sys"
        echo
        echo "Report any bugs to https://github.com/troglobit/pimd/issues"
        echo

        exit 1
}

echo > $TMP
echo "# Enabled features ..." >> $TMP

while [ "$*" != "" ]; do
        opt=`expr "$1" : "--\([^=]*\)=.*"`
        arg=`expr "$1" : "--[^=]*=\(.*\)"`
        if [ -z "$opt" ]; then
                opt=`expr "$1" : "--\(.*\)"`
        fi
        shift

        case $opt in
                enable-broken-crc)
                        echo "DEFS         += -DBROKEN_CISCO_CHECKSUM" >> $TMP
                        ;;

                enable-kernel-encap)
                        echo "DEFS         += -DPIM_REG_KERNEL_ENCAP" >> $TMP
                        ;;

                enable-kernel-mfc)
                        echo "DEFS         += -DKERNEL_MFC_WC_G" >> $TMP
                        ;;

                enable-memory-save)
                        echo "DEFS         += -DSAVE_MEMORY" >> $TMP
                        ;;

                enable-scoped-acls)
                        echo "DEFS         += -DSCOPED_ACL" >> $TMP
                        ;;

                enable-rsrr)
                        echo "DEFS         += -DRSRR" >> $TMP
                        echo "EXTRA_OBJS   += rsrr.o" >> $TMP
                        ;;     

                with-includes)
                        echo "INCLUDES     += -I$arg" >> $TMP
                        ;;

                help)
                        usage
                        ;;

                *)
                        echo "Unknown option: $opt"
                        usage
                        ;;
        esac
done

## BSDI		-D__bsdi__ is defined by the OS
#INCLUDES     = -Iinclude
#DEFS        +=
#EXTRA_OBJS   = strlcpy.o pidfile.o

## SunOS, OSF1, gcc
#INCLUDES     = -Iinclude -Iinclude/sunos-gcc
#DEFS        += -DSunOS=43
#EXTRA_OBJS   = strlcpy.o pidfile.o

## SunOS, OSF1, cc
#INCLUDES     = -Iinclude -Iinclude/sunos-cc
#DEFS        += -DSunOS=43
#EXTRA_OBJS   = strlcpy.o pidfile.o

## IRIX
#INCLUDES     = -Iinclude
#DEFS        += -D_BSD_SIGNALS -DIRIX
#EXTRA_OBJS   = strlcpy.o pidfile.o

## Solaris 2.5, gcc
#INCLUDES     = -Iinclude
#DEFS        += -DSYSV -DSunOS=55
## Solaris 2.5, cc
#INCLUDES     = -Iinclude
#DEFS        += -DSYSV -DSunOS=55
## Solaris 2.6
#INCLUDES     = -Iinclude
#DEFS        += -DSYSV -DSunOS=56
## Solaris 2.x
#EXTRA_OBJS   = strlcpy.o pidfile.o
#EXTRA_LIBS   = -L/usr/ucblib -lucb -L/usr/lib -lsocket -lnsl
case $OS in
        Linux)
                heading
	        echo "INCLUDES      = -Iinclude" >> $CFG
	        echo "DEFS         += -DRAW_OUTPUT_IS_RAW -DIOCTL_OK_ON_RAW_SOCKET" >> $CFG
	        echo "EXTRA_OBJS    = strlcpy.o pidfile.o" >> $CFG
	        echo "EXTRA_LIBS   =" >> $CFG
	        ;;

        FreeBSD)
                heading
	        echo "INCLUDES     =" >> $CFG
	        echo "DEFS        += -DHAVE_STRTONUM -DHAVE_STRLCPY" >> $CFG
	        echo "EXTRA_OBJS   = pidfile.o" >> $CFG
	        echo "EXTRA_LIBS   =" >> $CFG
	        ;;

        NetBSD)
                heading
	        echo "INCLUDES     =" >> $CFG
	        echo "DEFS        += -DHAVE_STRTONUM -DHAVE_STRLCPY -DHAVE_PIDFILE" >> $CFG
	        echo "EXTRA_OBJS   =" >> $CFG
	        echo "EXTRA_LIBS   = -lutil" >> $CFG
	        ;;

        OpenBSD)
                heading
	        echo "INCLUDES     =" >> $CFG
	        echo "DEFS        += -DHAVE_STRTONUM -DHAVE_STRLCPY -DHAVE_PIDFILE" >> $CFG
	        echo "EXTRA_OBJS   =" >> $CFG
	        echo "EXTRA_LIBS   = -lutil" >> $CFG
	        ;;

        *)
	        rm $CFG
	        echo "$OS is currently unsupported.  Help out at https://github.com/troglobit/pimd/"
	        exit 1
	        ;;
esac

cat $TMP >> $CFG
rm $TMP

exit 0