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1967 lines
57 KiB
C
1967 lines
57 KiB
C
/* $OpenBSD: dhclient.c,v 1.62 2004/12/05 18:35:51 deraadt Exp $ */
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/*
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* Copyright 2004 Henning Brauer <henning@openbsd.org>
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* Copyright (c) 1995, 1996, 1997, 1998, 1999
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* The Internet Software Consortium. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of The Internet Software Consortium nor the names
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* of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
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* CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This software has been written for the Internet Software Consortium
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* by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
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* Enterprises. To learn more about the Internet Software Consortium,
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* see ``http://www.vix.com/isc''. To learn more about Vixie
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* Enterprises, see ``http://www.vix.com''.
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*
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* This client was substantially modified and enhanced by Elliot Poger
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* for use on Linux while he was working on the MosquitoNet project at
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* Stanford.
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*
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* The current version owes much to Elliot's Linux enhancements, but
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* was substantially reorganized and partially rewritten by Ted Lemon
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* so as to use the same networking framework that the Internet Software
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* Consortium DHCP server uses. Much system-specific configuration code
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* was moved into a shell script so that as support for more operating
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* systems is added, it will not be necessary to port and maintain
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* system-specific configuration code to these operating systems - instead,
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* the shell script can invoke the native tools to accomplish the same
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* purpose.
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*/
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#include <rosdhcp.h>
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#define PERIOD 0x2e
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#define hyphenchar(c) ((c) == 0x2d)
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#define bslashchar(c) ((c) == 0x5c)
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#define periodchar(c) ((c) == PERIOD)
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#define asterchar(c) ((c) == 0x2a)
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#define alphachar(c) (((c) >= 0x41 && (c) <= 0x5a) || \
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((c) >= 0x61 && (c) <= 0x7a))
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#define digitchar(c) ((c) >= 0x30 && (c) <= 0x39)
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#define borderchar(c) (alphachar(c) || digitchar(c))
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#define middlechar(c) (borderchar(c) || hyphenchar(c))
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#define domainchar(c) ((c) > 0x20 && (c) < 0x7f)
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unsigned long debug_trace_level = 0; /* DEBUG_ULTRA */
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char *path_dhclient_conf = _PATH_DHCLIENT_CONF;
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char *path_dhclient_db = NULL;
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int log_perror = 1;
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int privfd;
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//int nullfd = -1;
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struct iaddr iaddr_broadcast = { 4, { 255, 255, 255, 255 } };
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struct in_addr inaddr_any;
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struct sockaddr_in sockaddr_broadcast;
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/*
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* ASSERT_STATE() does nothing now; it used to be
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* assert (state_is == state_shouldbe).
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*/
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#define ASSERT_STATE(state_is, state_shouldbe) {}
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#define TIME_MAX 2147483647
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int log_priority;
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int no_daemon;
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int unknown_ok = 1;
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int routefd;
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void usage(void);
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int check_option(struct client_lease *l, int option);
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int ipv4addrs(char * buf);
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int res_hnok(const char *dn);
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char *option_as_string(unsigned int code, unsigned char *data, int len);
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int fork_privchld(int, int);
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int check_arp( struct interface_info *ip, struct client_lease *lp );
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#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
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time_t scripttime;
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int
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init_client(void)
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{
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ApiInit();
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AdapterInit();
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tzset();
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memset(&sockaddr_broadcast, 0, sizeof(sockaddr_broadcast));
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sockaddr_broadcast.sin_family = AF_INET;
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sockaddr_broadcast.sin_port = htons(REMOTE_PORT);
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sockaddr_broadcast.sin_addr.s_addr = INADDR_BROADCAST;
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inaddr_any.s_addr = INADDR_ANY;
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bootp_packet_handler = do_packet;
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if (PipeInit() == INVALID_HANDLE_VALUE)
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{
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DbgPrint("DHCPCSVC: PipeInit() failed!\n");
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AdapterStop();
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ApiFree();
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return 0; // FALSE
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}
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return 1; // TRUE
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}
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void
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stop_client(void)
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{
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// AdapterStop();
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// ApiFree();
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/* FIXME: Close pipe and kill pipe thread */
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}
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/* XXX Implement me */
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int check_arp( struct interface_info *ip, struct client_lease *lp ) {
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return 1;
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}
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/*
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* Individual States:
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*
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* Each routine is called from the dhclient_state_machine() in one of
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* these conditions:
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* -> entering INIT state
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* -> recvpacket_flag == 0: timeout in this state
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* -> otherwise: received a packet in this state
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*
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* Return conditions as handled by dhclient_state_machine():
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* Returns 1, sendpacket_flag = 1: send packet, reset timer.
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* Returns 1, sendpacket_flag = 0: just reset the timer (wait for a milestone).
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* Returns 0: finish the nap which was interrupted for no good reason.
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*
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* Several per-interface variables are used to keep track of the process:
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* active_lease: the lease that is being used on the interface
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* (null pointer if not configured yet).
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* offered_leases: leases corresponding to DHCPOFFER messages that have
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* been sent to us by DHCP servers.
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* acked_leases: leases corresponding to DHCPACK messages that have been
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* sent to us by DHCP servers.
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* sendpacket: DHCP packet we're trying to send.
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* destination: IP address to send sendpacket to
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* In addition, there are several relevant per-lease variables.
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* T1_expiry, T2_expiry, lease_expiry: lease milestones
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* In the active lease, these control the process of renewing the lease;
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* In leases on the acked_leases list, this simply determines when we
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* can no longer legitimately use the lease.
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*/
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void
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state_reboot(void *ipp)
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{
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struct interface_info *ip = ipp;
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ULONG foo = (ULONG) GetTickCount();
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/* If we don't remember an active lease, go straight to INIT. */
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if (!ip->client->active || ip->client->active->is_bootp) {
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state_init(ip);
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return;
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}
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/* We are in the rebooting state. */
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ip->client->state = S_REBOOTING;
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/* make_request doesn't initialize xid because it normally comes
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from the DHCPDISCOVER, but we haven't sent a DHCPDISCOVER,
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so pick an xid now. */
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ip->client->xid = RtlRandom(&foo);
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/* Make a DHCPREQUEST packet, and set appropriate per-interface
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flags. */
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make_request(ip, ip->client->active);
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ip->client->destination = iaddr_broadcast;
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time(&ip->client->first_sending);
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ip->client->interval = ip->client->config->initial_interval;
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/* Zap the medium list... */
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ip->client->medium = NULL;
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/* Send out the first DHCPREQUEST packet. */
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send_request(ip);
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}
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/*
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* Called when a lease has completely expired and we've
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* been unable to renew it.
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*/
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void
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state_init(void *ipp)
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{
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struct interface_info *ip = ipp;
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ASSERT_STATE(state, S_INIT);
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/* Make a DHCPDISCOVER packet, and set appropriate per-interface
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flags. */
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make_discover(ip, ip->client->active);
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ip->client->xid = ip->client->packet.xid;
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ip->client->destination = iaddr_broadcast;
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ip->client->state = S_SELECTING;
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time(&ip->client->first_sending);
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ip->client->interval = ip->client->config->initial_interval;
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/* Add an immediate timeout to cause the first DHCPDISCOVER packet
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to go out. */
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send_discover(ip);
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}
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/*
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* state_selecting is called when one or more DHCPOFFER packets
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* have been received and a configurable period of time has passed.
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*/
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void
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state_selecting(void *ipp)
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{
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struct interface_info *ip = ipp;
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struct client_lease *lp, *next, *picked;
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time_t cur_time;
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ASSERT_STATE(state, S_SELECTING);
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time(&cur_time);
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/* Cancel state_selecting and send_discover timeouts, since either
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one could have got us here. */
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cancel_timeout(state_selecting, ip);
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cancel_timeout(send_discover, ip);
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/* We have received one or more DHCPOFFER packets. Currently,
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the only criterion by which we judge leases is whether or
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not we get a response when we arp for them. */
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picked = NULL;
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for (lp = ip->client->offered_leases; lp; lp = next) {
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next = lp->next;
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/* Check to see if we got an ARPREPLY for the address
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in this particular lease. */
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if (!picked) {
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if( !check_arp(ip,lp) ) goto freeit;
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picked = lp;
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picked->next = NULL;
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} else {
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freeit:
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free_client_lease(lp);
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}
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}
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ip->client->offered_leases = NULL;
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/* If we just tossed all the leases we were offered, go back
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to square one. */
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if (!picked) {
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ip->client->state = S_INIT;
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state_init(ip);
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return;
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}
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/* If it was a BOOTREPLY, we can just take the address right now. */
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if (!picked->options[DHO_DHCP_MESSAGE_TYPE].len) {
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ip->client->new = picked;
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/* Make up some lease expiry times
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XXX these should be configurable. */
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ip->client->new->expiry = cur_time + 12000;
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ip->client->new->renewal += cur_time + 8000;
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ip->client->new->rebind += cur_time + 10000;
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ip->client->state = S_REQUESTING;
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/* Bind to the address we received. */
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bind_lease(ip);
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return;
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}
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/* Go to the REQUESTING state. */
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ip->client->destination = iaddr_broadcast;
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ip->client->state = S_REQUESTING;
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ip->client->first_sending = cur_time;
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ip->client->interval = ip->client->config->initial_interval;
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/* Make a DHCPREQUEST packet from the lease we picked. */
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make_request(ip, picked);
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ip->client->xid = ip->client->packet.xid;
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/* Toss the lease we picked - we'll get it back in a DHCPACK. */
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free_client_lease(picked);
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/* Add an immediate timeout to send the first DHCPREQUEST packet. */
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send_request(ip);
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}
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/* state_requesting is called when we receive a DHCPACK message after
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having sent out one or more DHCPREQUEST packets. */
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void
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dhcpack(struct packet *packet)
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{
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struct interface_info *ip = packet->interface;
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struct client_lease *lease;
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time_t cur_time;
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time(&cur_time);
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/* If we're not receptive to an offer right now, or if the offer
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has an unrecognizable transaction id, then just drop it. */
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if (packet->interface->client->xid != packet->raw->xid ||
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(packet->interface->hw_address.hlen != packet->raw->hlen) ||
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(memcmp(packet->interface->hw_address.haddr,
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packet->raw->chaddr, packet->raw->hlen)))
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return;
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if (ip->client->state != S_REBOOTING &&
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ip->client->state != S_REQUESTING &&
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ip->client->state != S_RENEWING &&
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ip->client->state != S_REBINDING)
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return;
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note("DHCPACK from %s", piaddr(packet->client_addr));
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lease = packet_to_lease(packet);
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if (!lease) {
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note("packet_to_lease failed.");
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return;
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}
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ip->client->new = lease;
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/* Stop resending DHCPREQUEST. */
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cancel_timeout(send_request, ip);
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/* Figure out the lease time. */
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if (ip->client->new->options[DHO_DHCP_LEASE_TIME].data)
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ip->client->new->expiry = getULong(
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ip->client->new->options[DHO_DHCP_LEASE_TIME].data);
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else
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ip->client->new->expiry = DHCP_DEFAULT_LEASE_TIME;
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/* A number that looks negative here is really just very large,
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because the lease expiry offset is unsigned. */
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if (ip->client->new->expiry < 0)
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ip->client->new->expiry = TIME_MAX;
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/* XXX should be fixed by resetting the client state */
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if (ip->client->new->expiry < 60)
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ip->client->new->expiry = 60;
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/* Take the server-provided renewal time if there is one;
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otherwise figure it out according to the spec. */
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if (ip->client->new->options[DHO_DHCP_RENEWAL_TIME].len)
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ip->client->new->renewal = getULong(
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ip->client->new->options[DHO_DHCP_RENEWAL_TIME].data);
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else
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ip->client->new->renewal = ip->client->new->expiry / 2;
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/* Same deal with the rebind time. */
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if (ip->client->new->options[DHO_DHCP_REBINDING_TIME].len)
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ip->client->new->rebind = getULong(
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ip->client->new->options[DHO_DHCP_REBINDING_TIME].data);
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else
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ip->client->new->rebind = ip->client->new->renewal +
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ip->client->new->renewal / 2 + ip->client->new->renewal / 4;
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#ifdef __REACTOS__
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ip->client->new->obtained = cur_time;
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#endif
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ip->client->new->expiry += cur_time;
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/* Lease lengths can never be negative. */
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if (ip->client->new->expiry < cur_time)
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ip->client->new->expiry = TIME_MAX;
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ip->client->new->renewal += cur_time;
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if (ip->client->new->renewal < cur_time)
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ip->client->new->renewal = TIME_MAX;
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ip->client->new->rebind += cur_time;
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if (ip->client->new->rebind < cur_time)
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ip->client->new->rebind = TIME_MAX;
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bind_lease(ip);
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}
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void set_name_servers( PDHCP_ADAPTER Adapter, struct client_lease *new_lease ) {
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CHAR Buffer[200] = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\";
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HKEY RegKey;
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strcat(Buffer, Adapter->DhclientInfo.name);
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, Buffer, 0, KEY_WRITE, &RegKey ) != ERROR_SUCCESS)
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return;
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if( new_lease->options[DHO_DOMAIN_NAME_SERVERS].len ) {
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struct iaddr nameserver;
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char *nsbuf;
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int i, addrs =
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new_lease->options[DHO_DOMAIN_NAME_SERVERS].len / sizeof(ULONG);
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nsbuf = malloc( addrs * sizeof(IP_ADDRESS_STRING) );
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if( nsbuf) {
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nsbuf[0] = 0;
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for( i = 0; i < addrs; i++ ) {
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nameserver.len = sizeof(ULONG);
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memcpy( nameserver.iabuf,
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new_lease->options[DHO_DOMAIN_NAME_SERVERS].data +
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(i * sizeof(ULONG)), sizeof(ULONG) );
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strcat( nsbuf, piaddr(nameserver) );
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if( i != addrs-1 ) strcat( nsbuf, "," );
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}
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DH_DbgPrint(MID_TRACE,("Setting DhcpNameserver: %s\n", nsbuf));
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RegSetValueExA( RegKey, "DhcpNameServer", 0, REG_SZ,
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(LPBYTE)nsbuf, strlen(nsbuf) + 1 );
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free( nsbuf );
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}
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} else {
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RegDeleteValueW( RegKey, L"DhcpNameServer" );
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}
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RegCloseKey( RegKey );
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}
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void
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set_domain(PDHCP_ADAPTER Adapter,
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struct client_lease *new_lease)
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{
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CHAR Buffer1[MAX_PATH] = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\";
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CHAR Buffer2[MAX_PATH] = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters";
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HKEY RegKey1, RegKey2;
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strcat(Buffer1, Adapter->DhclientInfo.name);
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, Buffer1, 0, KEY_WRITE, &RegKey1 ) != ERROR_SUCCESS)
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{
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return;
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}
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if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, Buffer2, 0, KEY_WRITE, &RegKey2 ) != ERROR_SUCCESS)
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{
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RegCloseKey(RegKey1);
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return;
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}
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if (new_lease->options[DHO_DOMAIN_NAME].len)
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{
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DH_DbgPrint(MID_TRACE, ("Setting DhcpDomain: %s\n", new_lease->options[DHO_DOMAIN_NAME].data));
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RegSetValueExA(RegKey1,
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"DhcpDomain",
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0,
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REG_SZ,
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(LPBYTE)new_lease->options[DHO_DOMAIN_NAME].data,
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new_lease->options[DHO_DOMAIN_NAME].len);
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RegSetValueExA(RegKey2,
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"DhcpDomain",
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0,
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REG_SZ,
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(LPBYTE)new_lease->options[DHO_DOMAIN_NAME].data,
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new_lease->options[DHO_DOMAIN_NAME].len);
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}
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else
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{
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RegDeleteValueW(RegKey1, L"DhcpDomain");
|
|
RegDeleteValueW(RegKey2, L"DhcpDomain");
|
|
}
|
|
|
|
RegCloseKey(RegKey1);
|
|
RegCloseKey(RegKey2);
|
|
|
|
}
|
|
|
|
void setup_adapter( PDHCP_ADAPTER Adapter, struct client_lease *new_lease ) {
|
|
CHAR Buffer[200] = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\";
|
|
struct iaddr netmask;
|
|
HKEY hkey;
|
|
int i;
|
|
DWORD dwEnableDHCP;
|
|
|
|
strcat(Buffer, Adapter->DhclientInfo.name);
|
|
if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, Buffer, 0, KEY_WRITE, &hkey) != ERROR_SUCCESS)
|
|
hkey = NULL;
|
|
|
|
|
|
if( Adapter->NteContext )
|
|
{
|
|
DeleteIPAddress( Adapter->NteContext );
|
|
Adapter->NteContext = 0;
|
|
}
|
|
|
|
/* Set up our default router if we got one from the DHCP server */
|
|
if( new_lease->options[DHO_SUBNET_MASK].len ) {
|
|
NTSTATUS Status;
|
|
|
|
memcpy( netmask.iabuf,
|
|
new_lease->options[DHO_SUBNET_MASK].data,
|
|
new_lease->options[DHO_SUBNET_MASK].len );
|
|
Status = AddIPAddress
|
|
( *((ULONG*)new_lease->address.iabuf),
|
|
*((ULONG*)netmask.iabuf),
|
|
Adapter->IfMib.dwIndex,
|
|
&Adapter->NteContext,
|
|
&Adapter->NteInstance );
|
|
if (hkey) {
|
|
RegSetValueExA(hkey, "DhcpIPAddress", 0, REG_SZ, (LPBYTE)piaddr(new_lease->address), strlen(piaddr(new_lease->address))+1);
|
|
Buffer[0] = '\0';
|
|
for(i = 0; i < new_lease->options[DHO_SUBNET_MASK].len; i++)
|
|
{
|
|
sprintf(&Buffer[strlen(Buffer)], "%u", new_lease->options[DHO_SUBNET_MASK].data[i]);
|
|
if (i + 1 < new_lease->options[DHO_SUBNET_MASK].len)
|
|
strcat(Buffer, ".");
|
|
}
|
|
RegSetValueExA(hkey, "DhcpSubnetMask", 0, REG_SZ, (LPBYTE)Buffer, strlen(Buffer)+1);
|
|
dwEnableDHCP = 1;
|
|
RegSetValueExA(hkey, "EnableDHCP", 0, REG_DWORD, (LPBYTE)&dwEnableDHCP, sizeof(DWORD));
|
|
}
|
|
|
|
if( !NT_SUCCESS(Status) )
|
|
warning("AddIPAddress: %lx\n", Status);
|
|
}
|
|
|
|
if( new_lease->options[DHO_ROUTERS].len ) {
|
|
NTSTATUS Status;
|
|
|
|
Adapter->RouterMib.dwForwardDest = 0; /* Default route */
|
|
Adapter->RouterMib.dwForwardMask = 0;
|
|
Adapter->RouterMib.dwForwardMetric1 = 1;
|
|
Adapter->RouterMib.dwForwardIfIndex = Adapter->IfMib.dwIndex;
|
|
|
|
if( Adapter->RouterMib.dwForwardNextHop ) {
|
|
/* If we set a default route before, delete it before continuing */
|
|
DeleteIpForwardEntry( &Adapter->RouterMib );
|
|
}
|
|
|
|
Adapter->RouterMib.dwForwardNextHop =
|
|
*((ULONG*)new_lease->options[DHO_ROUTERS].data);
|
|
|
|
Status = CreateIpForwardEntry( &Adapter->RouterMib );
|
|
|
|
if( !NT_SUCCESS(Status) )
|
|
warning("CreateIpForwardEntry: %lx\n", Status);
|
|
|
|
if (hkey) {
|
|
Buffer[0] = '\0';
|
|
for(i = 0; i < new_lease->options[DHO_ROUTERS].len; i++)
|
|
{
|
|
sprintf(&Buffer[strlen(Buffer)], "%u", new_lease->options[DHO_ROUTERS].data[i]);
|
|
if (i + 1 < new_lease->options[DHO_ROUTERS].len)
|
|
strcat(Buffer, ".");
|
|
}
|
|
RegSetValueExA(hkey, "DhcpDefaultGateway", 0, REG_SZ, (LPBYTE)Buffer, strlen(Buffer)+1);
|
|
}
|
|
}
|
|
|
|
if (hkey)
|
|
RegCloseKey(hkey);
|
|
}
|
|
|
|
|
|
void
|
|
bind_lease(struct interface_info *ip)
|
|
{
|
|
PDHCP_ADAPTER Adapter;
|
|
struct client_lease *new_lease = ip->client->new;
|
|
time_t cur_time;
|
|
|
|
time(&cur_time);
|
|
|
|
/* Remember the medium. */
|
|
ip->client->new->medium = ip->client->medium;
|
|
ip->client->active = ip->client->new;
|
|
ip->client->new = NULL;
|
|
|
|
/* Set up a timeout to start the renewal process. */
|
|
/* Timeout of zero means no timeout (some implementations seem to use
|
|
* one day).
|
|
*/
|
|
if( ip->client->active->renewal - cur_time )
|
|
add_timeout(ip->client->active->renewal, state_bound, ip);
|
|
|
|
note("bound to %s -- renewal in %ld seconds.",
|
|
piaddr(ip->client->active->address),
|
|
(long int)(ip->client->active->renewal - cur_time));
|
|
|
|
ip->client->state = S_BOUND;
|
|
|
|
Adapter = AdapterFindInfo( ip );
|
|
|
|
if( Adapter ) setup_adapter( Adapter, new_lease );
|
|
else {
|
|
warning("Could not find adapter for info %p\n", ip);
|
|
return;
|
|
}
|
|
set_name_servers( Adapter, new_lease );
|
|
set_domain( Adapter, new_lease );
|
|
}
|
|
|
|
/*
|
|
* state_bound is called when we've successfully bound to a particular
|
|
* lease, but the renewal time on that lease has expired. We are
|
|
* expected to unicast a DHCPREQUEST to the server that gave us our
|
|
* original lease.
|
|
*/
|
|
void
|
|
state_bound(void *ipp)
|
|
{
|
|
struct interface_info *ip = ipp;
|
|
|
|
ASSERT_STATE(state, S_BOUND);
|
|
|
|
/* T1 has expired. */
|
|
make_request(ip, ip->client->active);
|
|
ip->client->xid = ip->client->packet.xid;
|
|
|
|
if (ip->client->active->options[DHO_DHCP_SERVER_IDENTIFIER].len == 4) {
|
|
memcpy(ip->client->destination.iabuf, ip->client->active->
|
|
options[DHO_DHCP_SERVER_IDENTIFIER].data, 4);
|
|
ip->client->destination.len = 4;
|
|
} else
|
|
ip->client->destination = iaddr_broadcast;
|
|
|
|
time(&ip->client->first_sending);
|
|
ip->client->interval = ip->client->config->initial_interval;
|
|
ip->client->state = S_RENEWING;
|
|
|
|
/* Send the first packet immediately. */
|
|
send_request(ip);
|
|
}
|
|
|
|
void
|
|
bootp(struct packet *packet)
|
|
{
|
|
struct iaddrlist *ap;
|
|
|
|
if (packet->raw->op != BOOTREPLY)
|
|
return;
|
|
|
|
/* If there's a reject list, make sure this packet's sender isn't
|
|
on it. */
|
|
for (ap = packet->interface->client->config->reject_list;
|
|
ap; ap = ap->next) {
|
|
if (addr_eq(packet->client_addr, ap->addr)) {
|
|
note("BOOTREPLY from %s rejected.", piaddr(ap->addr));
|
|
return;
|
|
}
|
|
}
|
|
dhcpoffer(packet);
|
|
}
|
|
|
|
void
|
|
dhcp(struct packet *packet)
|
|
{
|
|
struct iaddrlist *ap;
|
|
void (*handler)(struct packet *);
|
|
char *type;
|
|
|
|
switch (packet->packet_type) {
|
|
case DHCPOFFER:
|
|
handler = dhcpoffer;
|
|
type = "DHCPOFFER";
|
|
break;
|
|
case DHCPNAK:
|
|
handler = dhcpnak;
|
|
type = "DHCPNACK";
|
|
break;
|
|
case DHCPACK:
|
|
handler = dhcpack;
|
|
type = "DHCPACK";
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
|
|
/* If there's a reject list, make sure this packet's sender isn't
|
|
on it. */
|
|
for (ap = packet->interface->client->config->reject_list;
|
|
ap; ap = ap->next) {
|
|
if (addr_eq(packet->client_addr, ap->addr)) {
|
|
note("%s from %s rejected.", type, piaddr(ap->addr));
|
|
return;
|
|
}
|
|
}
|
|
(*handler)(packet);
|
|
}
|
|
|
|
void
|
|
dhcpoffer(struct packet *packet)
|
|
{
|
|
struct interface_info *ip = packet->interface;
|
|
struct client_lease *lease, *lp;
|
|
int i;
|
|
int arp_timeout_needed = 0, stop_selecting;
|
|
char *name = packet->options[DHO_DHCP_MESSAGE_TYPE].len ?
|
|
"DHCPOFFER" : "BOOTREPLY";
|
|
time_t cur_time;
|
|
|
|
time(&cur_time);
|
|
|
|
/* If we're not receptive to an offer right now, or if the offer
|
|
has an unrecognizable transaction id, then just drop it. */
|
|
if (ip->client->state != S_SELECTING ||
|
|
packet->interface->client->xid != packet->raw->xid ||
|
|
(packet->interface->hw_address.hlen != packet->raw->hlen) ||
|
|
(memcmp(packet->interface->hw_address.haddr,
|
|
packet->raw->chaddr, packet->raw->hlen)))
|
|
return;
|
|
|
|
note("%s from %s", name, piaddr(packet->client_addr));
|
|
|
|
|
|
/* If this lease doesn't supply the minimum required parameters,
|
|
blow it off. */
|
|
for (i = 0; ip->client->config->required_options[i]; i++) {
|
|
if (!packet->options[ip->client->config->
|
|
required_options[i]].len) {
|
|
note("%s isn't satisfactory.", name);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* If we've already seen this lease, don't record it again. */
|
|
for (lease = ip->client->offered_leases;
|
|
lease; lease = lease->next) {
|
|
if (lease->address.len == sizeof(packet->raw->yiaddr) &&
|
|
!memcmp(lease->address.iabuf,
|
|
&packet->raw->yiaddr, lease->address.len)) {
|
|
debug("%s already seen.", name);
|
|
return;
|
|
}
|
|
}
|
|
|
|
lease = packet_to_lease(packet);
|
|
if (!lease) {
|
|
note("packet_to_lease failed.");
|
|
return;
|
|
}
|
|
|
|
/* If this lease was acquired through a BOOTREPLY, record that
|
|
fact. */
|
|
if (!packet->options[DHO_DHCP_MESSAGE_TYPE].len)
|
|
lease->is_bootp = 1;
|
|
|
|
/* Record the medium under which this lease was offered. */
|
|
lease->medium = ip->client->medium;
|
|
|
|
/* Send out an ARP Request for the offered IP address. */
|
|
if( !check_arp( ip, lease ) ) {
|
|
note("Arp check failed\n");
|
|
return;
|
|
}
|
|
|
|
/* Figure out when we're supposed to stop selecting. */
|
|
stop_selecting =
|
|
ip->client->first_sending + ip->client->config->select_interval;
|
|
|
|
/* If this is the lease we asked for, put it at the head of the
|
|
list, and don't mess with the arp request timeout. */
|
|
if (lease->address.len == ip->client->requested_address.len &&
|
|
!memcmp(lease->address.iabuf,
|
|
ip->client->requested_address.iabuf,
|
|
ip->client->requested_address.len)) {
|
|
lease->next = ip->client->offered_leases;
|
|
ip->client->offered_leases = lease;
|
|
} else {
|
|
/* If we already have an offer, and arping for this
|
|
offer would take us past the selection timeout,
|
|
then don't extend the timeout - just hope for the
|
|
best. */
|
|
if (ip->client->offered_leases &&
|
|
(cur_time + arp_timeout_needed) > stop_selecting)
|
|
arp_timeout_needed = 0;
|
|
|
|
/* Put the lease at the end of the list. */
|
|
lease->next = NULL;
|
|
if (!ip->client->offered_leases)
|
|
ip->client->offered_leases = lease;
|
|
else {
|
|
for (lp = ip->client->offered_leases; lp->next;
|
|
lp = lp->next)
|
|
; /* nothing */
|
|
lp->next = lease;
|
|
}
|
|
}
|
|
|
|
/* If we're supposed to stop selecting before we've had time
|
|
to wait for the ARPREPLY, add some delay to wait for
|
|
the ARPREPLY. */
|
|
if (stop_selecting - cur_time < arp_timeout_needed)
|
|
stop_selecting = cur_time + arp_timeout_needed;
|
|
|
|
/* If the selecting interval has expired, go immediately to
|
|
state_selecting(). Otherwise, time out into
|
|
state_selecting at the select interval. */
|
|
if (stop_selecting <= 0)
|
|
state_selecting(ip);
|
|
else {
|
|
add_timeout(stop_selecting, state_selecting, ip);
|
|
cancel_timeout(send_discover, ip);
|
|
}
|
|
}
|
|
|
|
/* Allocate a client_lease structure and initialize it from the parameters
|
|
in the specified packet. */
|
|
|
|
struct client_lease *
|
|
packet_to_lease(struct packet *packet)
|
|
{
|
|
struct client_lease *lease;
|
|
int i;
|
|
|
|
lease = malloc(sizeof(struct client_lease));
|
|
|
|
if (!lease) {
|
|
warning("dhcpoffer: no memory to record lease.");
|
|
return (NULL);
|
|
}
|
|
|
|
memset(lease, 0, sizeof(*lease));
|
|
|
|
/* Copy the lease options. */
|
|
for (i = 0; i < 256; i++) {
|
|
if (packet->options[i].len) {
|
|
lease->options[i].data =
|
|
malloc(packet->options[i].len + 1);
|
|
if (!lease->options[i].data) {
|
|
warning("dhcpoffer: no memory for option %d", i);
|
|
free_client_lease(lease);
|
|
return (NULL);
|
|
} else {
|
|
memcpy(lease->options[i].data,
|
|
packet->options[i].data,
|
|
packet->options[i].len);
|
|
lease->options[i].len =
|
|
packet->options[i].len;
|
|
lease->options[i].data[lease->options[i].len] =
|
|
0;
|
|
}
|
|
if (!check_option(lease,i)) {
|
|
/* ignore a bogus lease offer */
|
|
warning("Invalid lease option - ignoring offer");
|
|
free_client_lease(lease);
|
|
return (NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
lease->address.len = sizeof(packet->raw->yiaddr);
|
|
memcpy(lease->address.iabuf, &packet->raw->yiaddr, lease->address.len);
|
|
#ifdef __REACTOS__
|
|
lease->serveraddress.len = sizeof(packet->raw->siaddr);
|
|
memcpy(lease->serveraddress.iabuf, &packet->raw->siaddr, lease->address.len);
|
|
#endif
|
|
|
|
/* If the server name was filled out, copy it. */
|
|
if ((!packet->options[DHO_DHCP_OPTION_OVERLOAD].len ||
|
|
!(packet->options[DHO_DHCP_OPTION_OVERLOAD].data[0] & 2)) &&
|
|
packet->raw->sname[0]) {
|
|
lease->server_name = malloc(DHCP_SNAME_LEN + 1);
|
|
if (!lease->server_name) {
|
|
warning("dhcpoffer: no memory for server name.");
|
|
free_client_lease(lease);
|
|
return (NULL);
|
|
}
|
|
memcpy(lease->server_name, packet->raw->sname, DHCP_SNAME_LEN);
|
|
lease->server_name[DHCP_SNAME_LEN]='\0';
|
|
if (!res_hnok(lease->server_name) ) {
|
|
warning("Bogus server name %s", lease->server_name );
|
|
free_client_lease(lease);
|
|
return (NULL);
|
|
}
|
|
|
|
}
|
|
|
|
/* Ditto for the filename. */
|
|
if ((!packet->options[DHO_DHCP_OPTION_OVERLOAD].len ||
|
|
!(packet->options[DHO_DHCP_OPTION_OVERLOAD].data[0] & 1)) &&
|
|
packet->raw->file[0]) {
|
|
/* Don't count on the NUL terminator. */
|
|
lease->filename = malloc(DHCP_FILE_LEN + 1);
|
|
if (!lease->filename) {
|
|
warning("dhcpoffer: no memory for filename.");
|
|
free_client_lease(lease);
|
|
return (NULL);
|
|
}
|
|
memcpy(lease->filename, packet->raw->file, DHCP_FILE_LEN);
|
|
lease->filename[DHCP_FILE_LEN]='\0';
|
|
}
|
|
return lease;
|
|
}
|
|
|
|
void
|
|
dhcpnak(struct packet *packet)
|
|
{
|
|
struct interface_info *ip = packet->interface;
|
|
|
|
/* If we're not receptive to an offer right now, or if the offer
|
|
has an unrecognizable transaction id, then just drop it. */
|
|
if (packet->interface->client->xid != packet->raw->xid ||
|
|
(packet->interface->hw_address.hlen != packet->raw->hlen) ||
|
|
(memcmp(packet->interface->hw_address.haddr,
|
|
packet->raw->chaddr, packet->raw->hlen)))
|
|
return;
|
|
|
|
if (ip->client->state != S_REBOOTING &&
|
|
ip->client->state != S_REQUESTING &&
|
|
ip->client->state != S_RENEWING &&
|
|
ip->client->state != S_REBINDING)
|
|
return;
|
|
|
|
note("DHCPNAK from %s", piaddr(packet->client_addr));
|
|
|
|
if (!ip->client->active) {
|
|
note("DHCPNAK with no active lease.\n");
|
|
return;
|
|
}
|
|
|
|
free_client_lease(ip->client->active);
|
|
ip->client->active = NULL;
|
|
|
|
/* Stop sending DHCPREQUEST packets... */
|
|
cancel_timeout(send_request, ip);
|
|
|
|
ip->client->state = S_INIT;
|
|
state_init(ip);
|
|
}
|
|
|
|
/* Send out a DHCPDISCOVER packet, and set a timeout to send out another
|
|
one after the right interval has expired. If we don't get an offer by
|
|
the time we reach the panic interval, call the panic function. */
|
|
|
|
void
|
|
send_discover(void *ipp)
|
|
{
|
|
struct interface_info *ip = ipp;
|
|
int interval, increase = 1;
|
|
time_t cur_time;
|
|
|
|
DH_DbgPrint(MID_TRACE,("Doing discover on interface %p\n",ip));
|
|
|
|
time(&cur_time);
|
|
|
|
/* Figure out how long it's been since we started transmitting. */
|
|
interval = cur_time - ip->client->first_sending;
|
|
|
|
/* If we're past the panic timeout, call the script and tell it
|
|
we haven't found anything for this interface yet. */
|
|
if (interval > ip->client->config->timeout) {
|
|
state_panic(ip);
|
|
ip->client->first_sending = cur_time;
|
|
}
|
|
|
|
/* If we're selecting media, try the whole list before doing
|
|
the exponential backoff, but if we've already received an
|
|
offer, stop looping, because we obviously have it right. */
|
|
if (!ip->client->offered_leases &&
|
|
ip->client->config->media) {
|
|
int fail = 0;
|
|
|
|
if (ip->client->medium) {
|
|
ip->client->medium = ip->client->medium->next;
|
|
increase = 0;
|
|
}
|
|
if (!ip->client->medium) {
|
|
if (fail)
|
|
error("No valid media types for %s!", ip->name);
|
|
ip->client->medium = ip->client->config->media;
|
|
increase = 1;
|
|
}
|
|
|
|
note("Trying medium \"%s\" %d", ip->client->medium->string,
|
|
increase);
|
|
/* XXX Support other media types eventually */
|
|
}
|
|
|
|
/*
|
|
* If we're supposed to increase the interval, do so. If it's
|
|
* currently zero (i.e., we haven't sent any packets yet), set
|
|
* it to one; otherwise, add to it a random number between zero
|
|
* and two times itself. On average, this means that it will
|
|
* double with every transmission.
|
|
*/
|
|
if (increase) {
|
|
if (!ip->client->interval)
|
|
ip->client->interval =
|
|
ip->client->config->initial_interval;
|
|
else {
|
|
ip->client->interval += (rand() >> 2) %
|
|
(2 * ip->client->interval);
|
|
}
|
|
|
|
/* Don't backoff past cutoff. */
|
|
if (ip->client->interval >
|
|
ip->client->config->backoff_cutoff)
|
|
ip->client->interval =
|
|
((ip->client->config->backoff_cutoff / 2)
|
|
+ ((rand() >> 2) %
|
|
ip->client->config->backoff_cutoff));
|
|
} else if (!ip->client->interval)
|
|
ip->client->interval =
|
|
ip->client->config->initial_interval;
|
|
|
|
/* If the backoff would take us to the panic timeout, just use that
|
|
as the interval. */
|
|
if (cur_time + ip->client->interval >
|
|
ip->client->first_sending + ip->client->config->timeout)
|
|
ip->client->interval =
|
|
(ip->client->first_sending +
|
|
ip->client->config->timeout) - cur_time + 1;
|
|
|
|
/* Record the number of seconds since we started sending. */
|
|
if (interval < 65536)
|
|
ip->client->packet.secs = htons(interval);
|
|
else
|
|
ip->client->packet.secs = htons(65535);
|
|
ip->client->secs = ip->client->packet.secs;
|
|
|
|
note("DHCPDISCOVER on %s to %s port %d interval %ld",
|
|
ip->name, inet_ntoa(sockaddr_broadcast.sin_addr),
|
|
ntohs(sockaddr_broadcast.sin_port), (long int)ip->client->interval);
|
|
|
|
/* Send out a packet. */
|
|
(void)send_packet(ip, &ip->client->packet, ip->client->packet_length,
|
|
inaddr_any, &sockaddr_broadcast, NULL);
|
|
|
|
DH_DbgPrint(MID_TRACE,("discover timeout: now %x -> then %x\n",
|
|
cur_time, cur_time + ip->client->interval));
|
|
|
|
add_timeout(cur_time + ip->client->interval, send_discover, ip);
|
|
}
|
|
|
|
/*
|
|
* state_panic gets called if we haven't received any offers in a preset
|
|
* amount of time. When this happens, we try to use existing leases
|
|
* that haven't yet expired, and failing that, we call the client script
|
|
* and hope it can do something.
|
|
*/
|
|
void
|
|
state_panic(void *ipp)
|
|
{
|
|
struct interface_info *ip = ipp;
|
|
PDHCP_ADAPTER Adapter = AdapterFindInfo(ip);
|
|
|
|
note("No DHCPOFFERS received.");
|
|
|
|
if (!Adapter->NteContext)
|
|
{
|
|
/* Generate an automatic private address */
|
|
DbgPrint("DHCPCSVC: Failed to receive a response from a DHCP server. An automatic private address will be assigned.\n");
|
|
|
|
/* FIXME: The address generation code sucks */
|
|
AddIPAddress(htonl(0xA9FE0000 | (rand() % 0xFFFF)), //169.254.X.X
|
|
htonl(0xFFFF0000), //255.255.0.0
|
|
Adapter->IfMib.dwIndex,
|
|
&Adapter->NteContext,
|
|
&Adapter->NteInstance);
|
|
}
|
|
}
|
|
|
|
void
|
|
send_request(void *ipp)
|
|
{
|
|
struct interface_info *ip = ipp;
|
|
struct sockaddr_in destination;
|
|
struct in_addr from;
|
|
int interval;
|
|
time_t cur_time;
|
|
|
|
time(&cur_time);
|
|
|
|
/* Figure out how long it's been since we started transmitting. */
|
|
interval = cur_time - ip->client->first_sending;
|
|
|
|
/* If we're in the INIT-REBOOT or REQUESTING state and we're
|
|
past the reboot timeout, go to INIT and see if we can
|
|
DISCOVER an address... */
|
|
/* XXX In the INIT-REBOOT state, if we don't get an ACK, it
|
|
means either that we're on a network with no DHCP server,
|
|
or that our server is down. In the latter case, assuming
|
|
that there is a backup DHCP server, DHCPDISCOVER will get
|
|
us a new address, but we could also have successfully
|
|
reused our old address. In the former case, we're hosed
|
|
anyway. This is not a win-prone situation. */
|
|
if ((ip->client->state == S_REBOOTING ||
|
|
ip->client->state == S_REQUESTING) &&
|
|
interval > ip->client->config->reboot_timeout) {
|
|
ip->client->state = S_INIT;
|
|
cancel_timeout(send_request, ip);
|
|
state_init(ip);
|
|
return;
|
|
}
|
|
|
|
/* If we're in the reboot state, make sure the media is set up
|
|
correctly. */
|
|
if (ip->client->state == S_REBOOTING &&
|
|
!ip->client->medium &&
|
|
ip->client->active->medium ) {
|
|
/* If the medium we chose won't fly, go to INIT state. */
|
|
/* XXX Nothing for now */
|
|
|
|
/* Record the medium. */
|
|
ip->client->medium = ip->client->active->medium;
|
|
}
|
|
|
|
/* If the lease has expired, relinquish the address and go back
|
|
to the INIT state. */
|
|
if (ip->client->state != S_REQUESTING &&
|
|
cur_time > ip->client->active->expiry) {
|
|
PDHCP_ADAPTER Adapter = AdapterFindInfo( ip );
|
|
/* Run the client script with the new parameters. */
|
|
/* No script actions necessary in the expiry case */
|
|
/* Now do a preinit on the interface so that we can
|
|
discover a new address. */
|
|
|
|
if( Adapter )
|
|
{
|
|
DeleteIPAddress( Adapter->NteContext );
|
|
Adapter->NteContext = 0;
|
|
}
|
|
|
|
ip->client->state = S_INIT;
|
|
state_init(ip);
|
|
return;
|
|
}
|
|
|
|
/* Do the exponential backoff... */
|
|
if (!ip->client->interval)
|
|
ip->client->interval = ip->client->config->initial_interval;
|
|
else
|
|
ip->client->interval += ((rand() >> 2) %
|
|
(2 * ip->client->interval));
|
|
|
|
/* Don't backoff past cutoff. */
|
|
if (ip->client->interval >
|
|
ip->client->config->backoff_cutoff)
|
|
ip->client->interval =
|
|
((ip->client->config->backoff_cutoff / 2) +
|
|
((rand() >> 2) % ip->client->interval));
|
|
|
|
/* If the backoff would take us to the expiry time, just set the
|
|
timeout to the expiry time. */
|
|
if (ip->client->state != S_REQUESTING &&
|
|
cur_time + ip->client->interval >
|
|
ip->client->active->expiry)
|
|
ip->client->interval =
|
|
ip->client->active->expiry - cur_time + 1;
|
|
|
|
/* If the lease T2 time has elapsed, or if we're not yet bound,
|
|
broadcast the DHCPREQUEST rather than unicasting. */
|
|
memset(&destination, 0, sizeof(destination));
|
|
if (ip->client->state == S_REQUESTING ||
|
|
ip->client->state == S_REBOOTING ||
|
|
cur_time > ip->client->active->rebind)
|
|
destination.sin_addr.s_addr = INADDR_BROADCAST;
|
|
else
|
|
memcpy(&destination.sin_addr.s_addr,
|
|
ip->client->destination.iabuf,
|
|
sizeof(destination.sin_addr.s_addr));
|
|
destination.sin_port = htons(REMOTE_PORT);
|
|
destination.sin_family = AF_INET;
|
|
// destination.sin_len = sizeof(destination);
|
|
|
|
if (ip->client->state != S_REQUESTING)
|
|
memcpy(&from, ip->client->active->address.iabuf,
|
|
sizeof(from));
|
|
else
|
|
from.s_addr = INADDR_ANY;
|
|
|
|
/* Record the number of seconds since we started sending. */
|
|
if (ip->client->state == S_REQUESTING)
|
|
ip->client->packet.secs = ip->client->secs;
|
|
else {
|
|
if (interval < 65536)
|
|
ip->client->packet.secs = htons(interval);
|
|
else
|
|
ip->client->packet.secs = htons(65535);
|
|
}
|
|
|
|
note("DHCPREQUEST on %s to %s port %d", ip->name,
|
|
inet_ntoa(destination.sin_addr), ntohs(destination.sin_port));
|
|
|
|
/* Send out a packet. */
|
|
(void) send_packet(ip, &ip->client->packet, ip->client->packet_length,
|
|
from, &destination, NULL);
|
|
|
|
add_timeout(cur_time + ip->client->interval, send_request, ip);
|
|
}
|
|
|
|
void
|
|
send_decline(void *ipp)
|
|
{
|
|
struct interface_info *ip = ipp;
|
|
|
|
note("DHCPDECLINE on %s to %s port %d", ip->name,
|
|
inet_ntoa(sockaddr_broadcast.sin_addr),
|
|
ntohs(sockaddr_broadcast.sin_port));
|
|
|
|
/* Send out a packet. */
|
|
(void) send_packet(ip, &ip->client->packet, ip->client->packet_length,
|
|
inaddr_any, &sockaddr_broadcast, NULL);
|
|
}
|
|
|
|
void
|
|
make_discover(struct interface_info *ip, struct client_lease *lease)
|
|
{
|
|
unsigned char discover = DHCPDISCOVER;
|
|
struct tree_cache *options[256];
|
|
struct tree_cache option_elements[256];
|
|
int i;
|
|
ULONG foo = (ULONG) GetTickCount();
|
|
|
|
memset(option_elements, 0, sizeof(option_elements));
|
|
memset(options, 0, sizeof(options));
|
|
memset(&ip->client->packet, 0, sizeof(ip->client->packet));
|
|
|
|
/* Set DHCP_MESSAGE_TYPE to DHCPDISCOVER */
|
|
i = DHO_DHCP_MESSAGE_TYPE;
|
|
options[i] = &option_elements[i];
|
|
options[i]->value = &discover;
|
|
options[i]->len = sizeof(discover);
|
|
options[i]->buf_size = sizeof(discover);
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
|
|
/* Request the options we want */
|
|
i = DHO_DHCP_PARAMETER_REQUEST_LIST;
|
|
options[i] = &option_elements[i];
|
|
options[i]->value = ip->client->config->requested_options;
|
|
options[i]->len = ip->client->config->requested_option_count;
|
|
options[i]->buf_size =
|
|
ip->client->config->requested_option_count;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
|
|
/* If we had an address, try to get it again. */
|
|
if (lease) {
|
|
ip->client->requested_address = lease->address;
|
|
i = DHO_DHCP_REQUESTED_ADDRESS;
|
|
options[i] = &option_elements[i];
|
|
options[i]->value = lease->address.iabuf;
|
|
options[i]->len = lease->address.len;
|
|
options[i]->buf_size = lease->address.len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
} else
|
|
ip->client->requested_address.len = 0;
|
|
|
|
/* Send any options requested in the config file. */
|
|
for (i = 0; i < 256; i++)
|
|
if (!options[i] &&
|
|
ip->client->config->send_options[i].data) {
|
|
options[i] = &option_elements[i];
|
|
options[i]->value =
|
|
ip->client->config->send_options[i].data;
|
|
options[i]->len =
|
|
ip->client->config->send_options[i].len;
|
|
options[i]->buf_size =
|
|
ip->client->config->send_options[i].len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
}
|
|
|
|
/* Set up the option buffer... */
|
|
ip->client->packet_length = cons_options(NULL, &ip->client->packet, 0,
|
|
options, 0, 0, 0, NULL, 0);
|
|
if (ip->client->packet_length < BOOTP_MIN_LEN)
|
|
ip->client->packet_length = BOOTP_MIN_LEN;
|
|
|
|
ip->client->packet.op = BOOTREQUEST;
|
|
ip->client->packet.htype = ip->hw_address.htype;
|
|
ip->client->packet.hlen = ip->hw_address.hlen;
|
|
ip->client->packet.hops = 0;
|
|
ip->client->packet.xid = RtlRandom(&foo);
|
|
ip->client->packet.secs = 0; /* filled in by send_discover. */
|
|
ip->client->packet.flags = 0;
|
|
|
|
memset(&(ip->client->packet.ciaddr),
|
|
0, sizeof(ip->client->packet.ciaddr));
|
|
memset(&(ip->client->packet.yiaddr),
|
|
0, sizeof(ip->client->packet.yiaddr));
|
|
memset(&(ip->client->packet.siaddr),
|
|
0, sizeof(ip->client->packet.siaddr));
|
|
memset(&(ip->client->packet.giaddr),
|
|
0, sizeof(ip->client->packet.giaddr));
|
|
memcpy(ip->client->packet.chaddr,
|
|
ip->hw_address.haddr, ip->hw_address.hlen);
|
|
}
|
|
|
|
|
|
void
|
|
make_request(struct interface_info *ip, struct client_lease * lease)
|
|
{
|
|
unsigned char request = DHCPREQUEST;
|
|
struct tree_cache *options[256];
|
|
struct tree_cache option_elements[256];
|
|
int i;
|
|
|
|
memset(options, 0, sizeof(options));
|
|
memset(&ip->client->packet, 0, sizeof(ip->client->packet));
|
|
|
|
/* Set DHCP_MESSAGE_TYPE to DHCPREQUEST */
|
|
i = DHO_DHCP_MESSAGE_TYPE;
|
|
options[i] = &option_elements[i];
|
|
options[i]->value = &request;
|
|
options[i]->len = sizeof(request);
|
|
options[i]->buf_size = sizeof(request);
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
|
|
/* Request the options we want */
|
|
i = DHO_DHCP_PARAMETER_REQUEST_LIST;
|
|
options[i] = &option_elements[i];
|
|
options[i]->value = ip->client->config->requested_options;
|
|
options[i]->len = ip->client->config->requested_option_count;
|
|
options[i]->buf_size =
|
|
ip->client->config->requested_option_count;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
|
|
/* If we are requesting an address that hasn't yet been assigned
|
|
to us, use the DHCP Requested Address option. */
|
|
if (ip->client->state == S_REQUESTING) {
|
|
/* Send back the server identifier... */
|
|
i = DHO_DHCP_SERVER_IDENTIFIER;
|
|
options[i] = &option_elements[i];
|
|
options[i]->value = lease->options[i].data;
|
|
options[i]->len = lease->options[i].len;
|
|
options[i]->buf_size = lease->options[i].len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
}
|
|
if (ip->client->state == S_REQUESTING ||
|
|
ip->client->state == S_REBOOTING) {
|
|
ip->client->requested_address = lease->address;
|
|
i = DHO_DHCP_REQUESTED_ADDRESS;
|
|
options[i] = &option_elements[i];
|
|
options[i]->value = lease->address.iabuf;
|
|
options[i]->len = lease->address.len;
|
|
options[i]->buf_size = lease->address.len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
} else
|
|
ip->client->requested_address.len = 0;
|
|
|
|
/* Send any options requested in the config file. */
|
|
for (i = 0; i < 256; i++)
|
|
if (!options[i] &&
|
|
ip->client->config->send_options[i].data) {
|
|
options[i] = &option_elements[i];
|
|
options[i]->value =
|
|
ip->client->config->send_options[i].data;
|
|
options[i]->len =
|
|
ip->client->config->send_options[i].len;
|
|
options[i]->buf_size =
|
|
ip->client->config->send_options[i].len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
}
|
|
|
|
/* Set up the option buffer... */
|
|
ip->client->packet_length = cons_options(NULL, &ip->client->packet, 0,
|
|
options, 0, 0, 0, NULL, 0);
|
|
if (ip->client->packet_length < BOOTP_MIN_LEN)
|
|
ip->client->packet_length = BOOTP_MIN_LEN;
|
|
|
|
ip->client->packet.op = BOOTREQUEST;
|
|
ip->client->packet.htype = ip->hw_address.htype;
|
|
ip->client->packet.hlen = ip->hw_address.hlen;
|
|
ip->client->packet.hops = 0;
|
|
ip->client->packet.xid = ip->client->xid;
|
|
ip->client->packet.secs = 0; /* Filled in by send_request. */
|
|
|
|
/* If we own the address we're requesting, put it in ciaddr;
|
|
otherwise set ciaddr to zero. */
|
|
if (ip->client->state == S_BOUND ||
|
|
ip->client->state == S_RENEWING ||
|
|
ip->client->state == S_REBINDING) {
|
|
memcpy(&ip->client->packet.ciaddr,
|
|
lease->address.iabuf, lease->address.len);
|
|
ip->client->packet.flags = 0;
|
|
} else {
|
|
memset(&ip->client->packet.ciaddr, 0,
|
|
sizeof(ip->client->packet.ciaddr));
|
|
ip->client->packet.flags = 0;
|
|
}
|
|
|
|
memset(&ip->client->packet.yiaddr, 0,
|
|
sizeof(ip->client->packet.yiaddr));
|
|
memset(&ip->client->packet.siaddr, 0,
|
|
sizeof(ip->client->packet.siaddr));
|
|
memset(&ip->client->packet.giaddr, 0,
|
|
sizeof(ip->client->packet.giaddr));
|
|
memcpy(ip->client->packet.chaddr,
|
|
ip->hw_address.haddr, ip->hw_address.hlen);
|
|
}
|
|
|
|
void
|
|
make_decline(struct interface_info *ip, struct client_lease *lease)
|
|
{
|
|
struct tree_cache *options[256], message_type_tree;
|
|
struct tree_cache requested_address_tree;
|
|
struct tree_cache server_id_tree, client_id_tree;
|
|
unsigned char decline = DHCPDECLINE;
|
|
int i;
|
|
|
|
memset(options, 0, sizeof(options));
|
|
memset(&ip->client->packet, 0, sizeof(ip->client->packet));
|
|
|
|
/* Set DHCP_MESSAGE_TYPE to DHCPDECLINE */
|
|
i = DHO_DHCP_MESSAGE_TYPE;
|
|
options[i] = &message_type_tree;
|
|
options[i]->value = &decline;
|
|
options[i]->len = sizeof(decline);
|
|
options[i]->buf_size = sizeof(decline);
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
|
|
/* Send back the server identifier... */
|
|
i = DHO_DHCP_SERVER_IDENTIFIER;
|
|
options[i] = &server_id_tree;
|
|
options[i]->value = lease->options[i].data;
|
|
options[i]->len = lease->options[i].len;
|
|
options[i]->buf_size = lease->options[i].len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
|
|
/* Send back the address we're declining. */
|
|
i = DHO_DHCP_REQUESTED_ADDRESS;
|
|
options[i] = &requested_address_tree;
|
|
options[i]->value = lease->address.iabuf;
|
|
options[i]->len = lease->address.len;
|
|
options[i]->buf_size = lease->address.len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
|
|
/* Send the uid if the user supplied one. */
|
|
i = DHO_DHCP_CLIENT_IDENTIFIER;
|
|
if (ip->client->config->send_options[i].len) {
|
|
options[i] = &client_id_tree;
|
|
options[i]->value = ip->client->config->send_options[i].data;
|
|
options[i]->len = ip->client->config->send_options[i].len;
|
|
options[i]->buf_size = ip->client->config->send_options[i].len;
|
|
options[i]->timeout = 0xFFFFFFFF;
|
|
}
|
|
|
|
|
|
/* Set up the option buffer... */
|
|
ip->client->packet_length = cons_options(NULL, &ip->client->packet, 0,
|
|
options, 0, 0, 0, NULL, 0);
|
|
if (ip->client->packet_length < BOOTP_MIN_LEN)
|
|
ip->client->packet_length = BOOTP_MIN_LEN;
|
|
|
|
ip->client->packet.op = BOOTREQUEST;
|
|
ip->client->packet.htype = ip->hw_address.htype;
|
|
ip->client->packet.hlen = ip->hw_address.hlen;
|
|
ip->client->packet.hops = 0;
|
|
ip->client->packet.xid = ip->client->xid;
|
|
ip->client->packet.secs = 0; /* Filled in by send_request. */
|
|
ip->client->packet.flags = 0;
|
|
|
|
/* ciaddr must always be zero. */
|
|
memset(&ip->client->packet.ciaddr, 0,
|
|
sizeof(ip->client->packet.ciaddr));
|
|
memset(&ip->client->packet.yiaddr, 0,
|
|
sizeof(ip->client->packet.yiaddr));
|
|
memset(&ip->client->packet.siaddr, 0,
|
|
sizeof(ip->client->packet.siaddr));
|
|
memset(&ip->client->packet.giaddr, 0,
|
|
sizeof(ip->client->packet.giaddr));
|
|
memcpy(ip->client->packet.chaddr,
|
|
ip->hw_address.haddr, ip->hw_address.hlen);
|
|
}
|
|
|
|
void
|
|
free_client_lease(struct client_lease *lease)
|
|
{
|
|
int i;
|
|
|
|
if (lease->server_name)
|
|
free(lease->server_name);
|
|
if (lease->filename)
|
|
free(lease->filename);
|
|
for (i = 0; i < 256; i++) {
|
|
if (lease->options[i].len)
|
|
free(lease->options[i].data);
|
|
}
|
|
free(lease);
|
|
}
|
|
|
|
FILE *leaseFile;
|
|
|
|
void
|
|
rewrite_client_leases(struct interface_info *ifi)
|
|
{
|
|
struct client_lease *lp;
|
|
|
|
if (!leaseFile) {
|
|
leaseFile = fopen(path_dhclient_db, "w");
|
|
if (!leaseFile)
|
|
error("can't create %s", path_dhclient_db);
|
|
} else {
|
|
fflush(leaseFile);
|
|
rewind(leaseFile);
|
|
}
|
|
|
|
for (lp = ifi->client->leases; lp; lp = lp->next)
|
|
write_client_lease(ifi, lp, 1);
|
|
if (ifi->client->active)
|
|
write_client_lease(ifi, ifi->client->active, 1);
|
|
|
|
fflush(leaseFile);
|
|
}
|
|
|
|
void
|
|
write_client_lease(struct interface_info *ip, struct client_lease *lease,
|
|
int rewrite)
|
|
{
|
|
static int leases_written;
|
|
struct tm *t;
|
|
int i;
|
|
|
|
if (!rewrite) {
|
|
if (leases_written++ > 20) {
|
|
rewrite_client_leases(ip);
|
|
leases_written = 0;
|
|
}
|
|
}
|
|
|
|
/* If the lease came from the config file, we don't need to stash
|
|
a copy in the lease database. */
|
|
if (lease->is_static)
|
|
return;
|
|
|
|
if (!leaseFile) { /* XXX */
|
|
leaseFile = fopen(path_dhclient_db, "w");
|
|
if (!leaseFile) {
|
|
error("can't create %s", path_dhclient_db);
|
|
return;
|
|
}
|
|
}
|
|
|
|
fprintf(leaseFile, "lease {\n");
|
|
if (lease->is_bootp)
|
|
fprintf(leaseFile, " bootp;\n");
|
|
fprintf(leaseFile, " interface \"%s\";\n", ip->name);
|
|
fprintf(leaseFile, " fixed-address %s;\n", piaddr(lease->address));
|
|
if (lease->filename)
|
|
fprintf(leaseFile, " filename \"%s\";\n", lease->filename);
|
|
if (lease->server_name)
|
|
fprintf(leaseFile, " server-name \"%s\";\n",
|
|
lease->server_name);
|
|
if (lease->medium)
|
|
fprintf(leaseFile, " medium \"%s\";\n", lease->medium->string);
|
|
for (i = 0; i < 256; i++)
|
|
if (lease->options[i].len)
|
|
fprintf(leaseFile, " option %s %s;\n",
|
|
dhcp_options[i].name,
|
|
pretty_print_option(i, lease->options[i].data,
|
|
lease->options[i].len, 1, 1));
|
|
|
|
t = gmtime(&lease->renewal);
|
|
if (t)
|
|
fprintf(leaseFile, " renew %d %d/%d/%d %02d:%02d:%02d;\n",
|
|
t->tm_wday, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
|
|
t->tm_hour, t->tm_min, t->tm_sec);
|
|
t = gmtime(&lease->rebind);
|
|
if (t)
|
|
fprintf(leaseFile, " rebind %d %d/%d/%d %02d:%02d:%02d;\n",
|
|
t->tm_wday, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
|
|
t->tm_hour, t->tm_min, t->tm_sec);
|
|
t = gmtime(&lease->expiry);
|
|
if (t)
|
|
fprintf(leaseFile, " expire %d %d/%d/%d %02d:%02d:%02d;\n",
|
|
t->tm_wday, t->tm_year + 1900, t->tm_mon + 1, t->tm_mday,
|
|
t->tm_hour, t->tm_min, t->tm_sec);
|
|
fprintf(leaseFile, "}\n");
|
|
fflush(leaseFile);
|
|
}
|
|
|
|
void
|
|
priv_script_init(struct interface_info *ip, char *reason, char *medium)
|
|
{
|
|
if (ip) {
|
|
// XXX Do we need to do anything?
|
|
}
|
|
}
|
|
|
|
void
|
|
priv_script_write_params(struct interface_info *ip, char *prefix, struct client_lease *lease)
|
|
{
|
|
u_int8_t dbuf[1500];
|
|
int i, len = 0;
|
|
|
|
#if 0
|
|
script_set_env(ip->client, prefix, "ip_address",
|
|
piaddr(lease->address));
|
|
#endif
|
|
|
|
if (lease->options[DHO_SUBNET_MASK].len &&
|
|
(lease->options[DHO_SUBNET_MASK].len <
|
|
sizeof(lease->address.iabuf))) {
|
|
struct iaddr netmask, subnet, broadcast;
|
|
|
|
memcpy(netmask.iabuf, lease->options[DHO_SUBNET_MASK].data,
|
|
lease->options[DHO_SUBNET_MASK].len);
|
|
netmask.len = lease->options[DHO_SUBNET_MASK].len;
|
|
|
|
subnet = subnet_number(lease->address, netmask);
|
|
if (subnet.len) {
|
|
#if 0
|
|
script_set_env(ip->client, prefix, "network_number",
|
|
piaddr(subnet));
|
|
#endif
|
|
if (!lease->options[DHO_BROADCAST_ADDRESS].len) {
|
|
broadcast = broadcast_addr(subnet, netmask);
|
|
if (broadcast.len)
|
|
#if 0
|
|
script_set_env(ip->client, prefix,
|
|
"broadcast_address",
|
|
piaddr(broadcast));
|
|
#else
|
|
;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
if (lease->filename)
|
|
script_set_env(ip->client, prefix, "filename", lease->filename);
|
|
if (lease->server_name)
|
|
script_set_env(ip->client, prefix, "server_name",
|
|
lease->server_name);
|
|
#endif
|
|
|
|
for (i = 0; i < 256; i++) {
|
|
u_int8_t *dp = NULL;
|
|
|
|
if (ip->client->config->defaults[i].len) {
|
|
if (lease->options[i].len) {
|
|
switch (
|
|
ip->client->config->default_actions[i]) {
|
|
case ACTION_DEFAULT:
|
|
dp = lease->options[i].data;
|
|
len = lease->options[i].len;
|
|
break;
|
|
case ACTION_SUPERSEDE:
|
|
supersede:
|
|
dp = ip->client->
|
|
config->defaults[i].data;
|
|
len = ip->client->
|
|
config->defaults[i].len;
|
|
break;
|
|
case ACTION_PREPEND:
|
|
len = ip->client->
|
|
config->defaults[i].len +
|
|
lease->options[i].len;
|
|
if (len >= sizeof(dbuf)) {
|
|
warning("no space to %s %s",
|
|
"prepend option",
|
|
dhcp_options[i].name);
|
|
goto supersede;
|
|
}
|
|
dp = dbuf;
|
|
memcpy(dp,
|
|
ip->client->
|
|
config->defaults[i].data,
|
|
ip->client->
|
|
config->defaults[i].len);
|
|
memcpy(dp + ip->client->
|
|
config->defaults[i].len,
|
|
lease->options[i].data,
|
|
lease->options[i].len);
|
|
dp[len] = '\0';
|
|
break;
|
|
case ACTION_APPEND:
|
|
len = ip->client->
|
|
config->defaults[i].len +
|
|
lease->options[i].len + 1;
|
|
if (len > sizeof(dbuf)) {
|
|
warning("no space to %s %s",
|
|
"append option",
|
|
dhcp_options[i].name);
|
|
goto supersede;
|
|
}
|
|
dp = dbuf;
|
|
memcpy(dp,
|
|
lease->options[i].data,
|
|
lease->options[i].len);
|
|
memcpy(dp + lease->options[i].len,
|
|
ip->client->
|
|
config->defaults[i].data,
|
|
ip->client->
|
|
config->defaults[i].len);
|
|
dp[len-1] = '\0';
|
|
}
|
|
} else {
|
|
dp = ip->client->
|
|
config->defaults[i].data;
|
|
len = ip->client->
|
|
config->defaults[i].len;
|
|
}
|
|
} else if (lease->options[i].len) {
|
|
len = lease->options[i].len;
|
|
dp = lease->options[i].data;
|
|
} else {
|
|
len = 0;
|
|
}
|
|
#if 0
|
|
if (len) {
|
|
char name[256];
|
|
|
|
if (dhcp_option_ev_name(name, sizeof(name),
|
|
&dhcp_options[i]))
|
|
script_set_env(ip->client, prefix, name,
|
|
pretty_print_option(i, dp, len, 0, 0));
|
|
}
|
|
#endif
|
|
}
|
|
#if 0
|
|
snprintf(tbuf, sizeof(tbuf), "%d", (int)lease->expiry);
|
|
script_set_env(ip->client, prefix, "expiry", tbuf);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
dhcp_option_ev_name(char *buf, size_t buflen, struct dhcp_option *option)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; option->name[i]; i++) {
|
|
if (i + 1 == buflen)
|
|
return 0;
|
|
if (option->name[i] == '-')
|
|
buf[i] = '_';
|
|
else
|
|
buf[i] = option->name[i];
|
|
}
|
|
|
|
buf[i] = 0;
|
|
return 1;
|
|
}
|
|
|
|
#if 0
|
|
void
|
|
go_daemon(void)
|
|
{
|
|
static int state = 0;
|
|
|
|
if (no_daemon || state)
|
|
return;
|
|
|
|
state = 1;
|
|
|
|
/* Stop logging to stderr... */
|
|
log_perror = 0;
|
|
|
|
if (daemon(1, 0) == -1)
|
|
error("daemon");
|
|
|
|
/* we are chrooted, daemon(3) fails to open /dev/null */
|
|
if (nullfd != -1) {
|
|
dup2(nullfd, STDIN_FILENO);
|
|
dup2(nullfd, STDOUT_FILENO);
|
|
dup2(nullfd, STDERR_FILENO);
|
|
close(nullfd);
|
|
nullfd = -1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
int
|
|
check_option(struct client_lease *l, int option)
|
|
{
|
|
char *opbuf;
|
|
char *sbuf;
|
|
|
|
/* we use this, since this is what gets passed to dhclient-script */
|
|
|
|
opbuf = pretty_print_option(option, l->options[option].data,
|
|
l->options[option].len, 0, 0);
|
|
|
|
sbuf = option_as_string(option, l->options[option].data,
|
|
l->options[option].len);
|
|
|
|
switch (option) {
|
|
case DHO_SUBNET_MASK:
|
|
case DHO_TIME_SERVERS:
|
|
case DHO_NAME_SERVERS:
|
|
case DHO_ROUTERS:
|
|
case DHO_DOMAIN_NAME_SERVERS:
|
|
case DHO_LOG_SERVERS:
|
|
case DHO_COOKIE_SERVERS:
|
|
case DHO_LPR_SERVERS:
|
|
case DHO_IMPRESS_SERVERS:
|
|
case DHO_RESOURCE_LOCATION_SERVERS:
|
|
case DHO_SWAP_SERVER:
|
|
case DHO_BROADCAST_ADDRESS:
|
|
case DHO_NIS_SERVERS:
|
|
case DHO_NTP_SERVERS:
|
|
case DHO_NETBIOS_NAME_SERVERS:
|
|
case DHO_NETBIOS_DD_SERVER:
|
|
case DHO_FONT_SERVERS:
|
|
case DHO_DHCP_SERVER_IDENTIFIER:
|
|
if (!ipv4addrs(opbuf)) {
|
|
warning("Invalid IP address in option(%d): %s", option, opbuf);
|
|
return (0);
|
|
}
|
|
return (1) ;
|
|
case DHO_HOST_NAME:
|
|
case DHO_DOMAIN_NAME:
|
|
case DHO_NIS_DOMAIN:
|
|
if (!res_hnok(sbuf))
|
|
warning("Bogus Host Name option %d: %s (%s)", option,
|
|
sbuf, opbuf);
|
|
return (1);
|
|
case DHO_PAD:
|
|
case DHO_TIME_OFFSET:
|
|
case DHO_BOOT_SIZE:
|
|
case DHO_MERIT_DUMP:
|
|
case DHO_ROOT_PATH:
|
|
case DHO_EXTENSIONS_PATH:
|
|
case DHO_IP_FORWARDING:
|
|
case DHO_NON_LOCAL_SOURCE_ROUTING:
|
|
case DHO_POLICY_FILTER:
|
|
case DHO_MAX_DGRAM_REASSEMBLY:
|
|
case DHO_DEFAULT_IP_TTL:
|
|
case DHO_PATH_MTU_AGING_TIMEOUT:
|
|
case DHO_PATH_MTU_PLATEAU_TABLE:
|
|
case DHO_INTERFACE_MTU:
|
|
case DHO_ALL_SUBNETS_LOCAL:
|
|
case DHO_PERFORM_MASK_DISCOVERY:
|
|
case DHO_MASK_SUPPLIER:
|
|
case DHO_ROUTER_DISCOVERY:
|
|
case DHO_ROUTER_SOLICITATION_ADDRESS:
|
|
case DHO_STATIC_ROUTES:
|
|
case DHO_TRAILER_ENCAPSULATION:
|
|
case DHO_ARP_CACHE_TIMEOUT:
|
|
case DHO_IEEE802_3_ENCAPSULATION:
|
|
case DHO_DEFAULT_TCP_TTL:
|
|
case DHO_TCP_KEEPALIVE_INTERVAL:
|
|
case DHO_TCP_KEEPALIVE_GARBAGE:
|
|
case DHO_VENDOR_ENCAPSULATED_OPTIONS:
|
|
case DHO_NETBIOS_NODE_TYPE:
|
|
case DHO_NETBIOS_SCOPE:
|
|
case DHO_X_DISPLAY_MANAGER:
|
|
case DHO_DHCP_REQUESTED_ADDRESS:
|
|
case DHO_DHCP_LEASE_TIME:
|
|
case DHO_DHCP_OPTION_OVERLOAD:
|
|
case DHO_DHCP_MESSAGE_TYPE:
|
|
case DHO_DHCP_PARAMETER_REQUEST_LIST:
|
|
case DHO_DHCP_MESSAGE:
|
|
case DHO_DHCP_MAX_MESSAGE_SIZE:
|
|
case DHO_DHCP_RENEWAL_TIME:
|
|
case DHO_DHCP_REBINDING_TIME:
|
|
case DHO_DHCP_CLASS_IDENTIFIER:
|
|
case DHO_DHCP_CLIENT_IDENTIFIER:
|
|
case DHO_DHCP_USER_CLASS_ID:
|
|
case DHO_END:
|
|
return (1);
|
|
default:
|
|
warning("unknown dhcp option value 0x%x", option);
|
|
return (unknown_ok);
|
|
}
|
|
}
|
|
|
|
int
|
|
res_hnok(const char *dn)
|
|
{
|
|
int pch = PERIOD, ch = *dn++;
|
|
|
|
while (ch != '\0') {
|
|
int nch = *dn++;
|
|
|
|
if (periodchar(ch)) {
|
|
;
|
|
} else if (periodchar(pch)) {
|
|
if (!borderchar(ch))
|
|
return (0);
|
|
} else if (periodchar(nch) || nch == '\0') {
|
|
if (!borderchar(ch))
|
|
return (0);
|
|
} else {
|
|
if (!middlechar(ch))
|
|
return (0);
|
|
}
|
|
pch = ch, ch = nch;
|
|
}
|
|
return (1);
|
|
}
|
|
|
|
/* Does buf consist only of dotted decimal ipv4 addrs?
|
|
* return how many if so,
|
|
* otherwise, return 0
|
|
*/
|
|
int
|
|
ipv4addrs(char * buf)
|
|
{
|
|
char *tmp;
|
|
struct in_addr jnk;
|
|
int i = 0;
|
|
|
|
note("Input: %s", buf);
|
|
|
|
do {
|
|
tmp = strtok(buf, " ");
|
|
note("got %s", tmp);
|
|
if( tmp && inet_aton(tmp, &jnk) ) i++;
|
|
buf = NULL;
|
|
} while( tmp );
|
|
|
|
return (i);
|
|
}
|
|
|
|
|
|
char *
|
|
option_as_string(unsigned int code, unsigned char *data, int len)
|
|
{
|
|
static char optbuf[32768]; /* XXX */
|
|
char *op = optbuf;
|
|
int opleft = sizeof(optbuf);
|
|
unsigned char *dp = data;
|
|
|
|
if (code > 255)
|
|
error("option_as_string: bad code %d", code);
|
|
|
|
for (; dp < data + len; dp++) {
|
|
if (!isascii(*dp) || !isprint(*dp)) {
|
|
if (dp + 1 != data + len || *dp != 0) {
|
|
_snprintf(op, opleft, "\\%03o", *dp);
|
|
op += 4;
|
|
opleft -= 4;
|
|
}
|
|
} else if (*dp == '"' || *dp == '\'' || *dp == '$' ||
|
|
*dp == '`' || *dp == '\\') {
|
|
*op++ = '\\';
|
|
*op++ = *dp;
|
|
opleft -= 2;
|
|
} else {
|
|
*op++ = *dp;
|
|
opleft--;
|
|
}
|
|
}
|
|
if (opleft < 1)
|
|
goto toobig;
|
|
*op = 0;
|
|
return optbuf;
|
|
toobig:
|
|
warning("dhcp option too large");
|
|
return "<error>";
|
|
}
|
|
|