add missing call to libdhcp_callbacks_register(). should stop dhcrelay() crashing when accessing *libdhcp_callbacks.local_port. Index: dist/relay/dhcrelay.c =================================================================== RCS file: /cvsroot/src/external/mpl/dhcp/dist/relay/dhcrelay.c,v retrieving revision 1.2 diff -p -u -r1.2 dhcrelay.c --- dist/relay/dhcrelay.c 7 Apr 2018 22:37:30 -0000 1.2 +++ dist/relay/dhcrelay.c 21 May 2021 01:58:14 -0000 @@ -310,6 +310,8 @@ main(int argc, char **argv) { int local_family_set = 0; #endif + libdhcp_callbacks_register(&dhcrelay_callbacks); + #ifdef OLD_LOG_NAME progname = "dhcrelay"; #else