/* $OpenBSD: privsep.c,v 1.42 2016/09/02 15:44:26 mpi Exp $ */ /* * Copyright (c) 2004 Henning Brauer * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT * OF OR IN CONNECTION WITH THE USE, ABUSE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include #include #include #include #include #include #include #include #include "dhcp.h" #include "dhcpd.h" #include "privsep.h" void dispatch_imsg(struct interface_info *ifi, struct imsgbuf *ibuf) { struct imsg imsg; ssize_t n; for (;;) { if ((n = imsg_get(ibuf, &imsg)) == -1) error("dispatch_imsg: imsg_get failure: %s", strerror(errno)); if (n == 0) break; switch (imsg.hdr.type) { case IMSG_DELETE_ADDRESS: if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct imsg_delete_address)) warning("bad IMSG_DELETE_ADDRESS"); else priv_delete_address(ifi, imsg.data); break; case IMSG_ADD_ADDRESS: if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct imsg_add_address)) warning("bad IMSG_ADD_ADDRESS"); else priv_add_address(ifi, imsg.data); break; case IMSG_FLUSH_ROUTES: if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct imsg_flush_routes)) warning("bad IMSG_FLUSH_ROUTES"); else priv_flush_routes(ifi, imsg.data); break; case IMSG_ADD_ROUTE: if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct imsg_add_route)) warning("bad IMSG_ADD_ROUTE"); else priv_add_route(ifi, imsg.data); break; case IMSG_SET_INTERFACE_MTU: if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct imsg_set_interface_mtu)) warning("bad IMSG_SET_INTERFACE_MTU"); else priv_set_interface_mtu(ifi, imsg.data); break; case IMSG_HUP: if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct imsg_hup)) warning("bad IMSG_HUP"); else { ifi->flags |= IFI_HUP; quit = SIGHUP; } break; case IMSG_WRITE_RESOLV_CONF: priv_write_resolv_conf(ifi, &imsg); break; case IMSG_WRITE_OPTION_DB: priv_write_option_db(&imsg); break; default: warning("received unknown message, code %u", imsg.hdr.type); } imsg_free(&imsg); } }