Very Computer

hi, i'm hoping to find someone who's read unix network programming and can
help me out with a small problem i'm running into. I downloaded steven's
source code http://rbhs.ath.cx/unpv12e.tar.tar and untarred it to my home
directory. ran the configure script, then went into cd lib; and did gmake
(gmake for *BSD) just as the README said. but i ran into the following
errors that i dont know what to do about.

./configure;cd lib;gmake
-----
# gmake
gcc -g -O2 -Wall   -c -o connect_nonb.o connect_nonb.c
gcc -g -O2 -Wall   -c -o connect_timeo.o connect_timeo.c
gcc -g -O2 -Wall   -c -o daemon_inetd.o daemon_inetd.c
gcc -g -O2 -Wall   -c -o daemon_init.o daemon_init.c
gcc -g -O2 -Wall   -c -o dg_cli.o dg_cli.c
gcc -g -O2 -Wall   -c -o dg_echo.o dg_echo.c
gcc -g -O2 -Wall   -c -o error.o error.c
gcc -g -O2 -Wall   -c -o get_ifi_info.o get_ifi_info.c
gcc -g -O2 -Wall   -c -o gf_time.o gf_time.c
gf_time.c: In function `gf_time':
gf_time.c:14: warning: passing arg 1 of `ctime' from incompatible pointer
type
gcc -g -O2 -Wall   -c -o host_serv.o host_serv.c
gcc -g -O2 -Wall   -c -o isfdtype.o isfdtype.c
gcc -g -O2 -Wall   -c -o mcast_leave.o mcast_leave.c
mcast_leave.c: In function `mcast_leave':
mcast_leave.c:26: `IPV6_DROP_MEMBERSHIP' undeclared (first use in this
function)
mcast_leave.c:26: (Each undeclared identifier is reported only once
mcast_leave.c:26: for each function it appears in.)
gmake: *** [mcast_leave.o] Error 1
# pwd
/root/unpv12e/lib
#

any help would be greatly appreciated.
-Reza

oh i'm running openbsd 3.1

in comp.unix.programmer i read:

Quote:>mcast_leave.c:26: `IPV6_DROP_MEMBERSHIP' undeclared (first use in this
>function)

rfc 2553 changed the name to IPV6_LEAVE_GROUP.

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