-/* $OpenBSD: dhclient.c,v 1.62 2004/12/05 18:35:51 deraadt Exp $ */
-
-/*
- * Copyright 2004 Henning Brauer <henning@openbsd.org>
- * Copyright (c) 1995, 1996, 1997, 1998, 1999
- * The Internet Software Consortium. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of The Internet Software Consortium nor the names
- * of its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INTERNET SOFTWARE CONSORTIUM AND
- * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE INTERNET SOFTWARE CONSORTIUM OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * This software has been written for the Internet Software Consortium
- * by Ted Lemon <mellon@fugue.com> in cooperation with Vixie
- * Enterprises. To learn more about the Internet Software Consortium,
- * see ``http://www.vix.com/isc''. To learn more about Vixie
- * Enterprises, see ``http://www.vix.com''.
- *
- * This client was substantially modified and enhanced by Elliot Poger
- * for use on Linux while he was working on the MosquitoNet project at
- * Stanford.
- *
- * The current version owes much to Elliot's Linux enhancements, but
- * was substantially reorganized and partially rewritten by Ted Lemon
- * so as to use the same networking framework that the Internet Software
- * Consortium DHCP server uses. Much system-specific configuration code
- * was moved into a shell script so that as support for more operating
- * systems is added, it will not be necessary to port and maintain
- * system-specific configuration code to these operating systems - instead,
- * the shell script can invoke the native tools to accomplish the same
- * purpose.
- */
-
-#include "rosdhcp.h"
-#include "dhcpd.h"
-
-#define PERIOD 0x2e
-#define hyphenchar(c) ((c) == 0x2d)
-#define bslashchar(c) ((c) == 0x5c)
-#define periodchar(c) ((c) == PERIOD)
-#define asterchar(c) ((c) == 0x2a)
-#define alphachar(c) (((c) >= 0x41 && (c) <= 0x5a) || \
- ((c) >= 0x61 && (c) <= 0x7a))
-#define digitchar(c) ((c) >= 0x30 && (c) <= 0x39)
-
-#define borderchar(c) (alphachar(c) || digitchar(c))
-#define middlechar(c) (borderchar(c) || hyphenchar(c))
-#define domainchar(c) ((c) > 0x20 && (c) < 0x7f)
-
-unsigned long debug_trace_level = 0; /* DEBUG_ULTRA */
-
-char *path_dhclient_conf = _PATH_DHCLIENT_CONF;
-char *path_dhclient_db = NULL;
-
-int log_perror = 1;
-int privfd;
-//int nullfd = -1;
-
-struct iaddr iaddr_broadcast = { 4, { 255, 255, 255, 255 } };
-struct in_addr inaddr_any;
-struct sockaddr_in sockaddr_broadcast;
-
-/*
- * ASSERT_STATE() does nothing now; it used to be
- * assert (state_is == state_shouldbe).
- */
-#define ASSERT_STATE(state_is, state_shouldbe) {}
-
-#define TIME_MAX 2147483647
-
-int log_priority;
-int no_daemon;
-int unknown_ok = 1;
-int routefd;
-
-void usage(void);
-int check_option(struct client_lease *l, int option);
-int ipv4addrs(char * buf);
-int res_hnok(const char *dn);
-char *option_as_string(unsigned int code, unsigned char *data, int len);
-int fork_privchld(int, int);
-int check_arp( struct interface_info *ip, struct client_lease *lp );
-
-#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
-
-time_t scripttime;
-
-static WCHAR ServiceName[] = L"DHCP";
-
-SERVICE_STATUS_HANDLE ServiceStatusHandle = 0;
-SERVICE_STATUS ServiceStatus;
-
-
-/* XXX Implement me */
-int check_arp( struct interface_info *ip, struct client_lease *lp ) {
- return 1;
-}
-
-
-static VOID
-UpdateServiceStatus(DWORD dwState)
-{
- ServiceStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
- ServiceStatus.dwCurrentState = dwState;
-
- ServiceStatus.dwControlsAccepted = 0;
-
- ServiceStatus.dwWin32ExitCode = 0;
- ServiceStatus.dwServiceSpecificExitCode = 0;
- ServiceStatus.dwCheckPoint = 0;
-
- if (dwState == SERVICE_START_PENDING ||
- dwState == SERVICE_STOP_PENDING ||
- dwState == SERVICE_PAUSE_PENDING ||
- dwState == SERVICE_CONTINUE_PENDING)
- ServiceStatus.dwWaitHint = 10000;
- else
- ServiceStatus.dwWaitHint = 0;
-
- SetServiceStatus(ServiceStatusHandle,
- &ServiceStatus);
-}
-
-
-static DWORD WINAPI
-ServiceControlHandler(DWORD dwControl,
- DWORD dwEventType,
- LPVOID lpEventData,
- LPVOID lpContext)
-{
- switch (dwControl)
- {
- case SERVICE_CONTROL_STOP:
- UpdateServiceStatus(SERVICE_STOP_PENDING);
- UpdateServiceStatus(SERVICE_STOPPED);
- return ERROR_SUCCESS;
-
- case SERVICE_CONTROL_PAUSE:
- UpdateServiceStatus(SERVICE_PAUSED);
- return ERROR_SUCCESS;
-
- case SERVICE_CONTROL_CONTINUE:
- UpdateServiceStatus(SERVICE_START_PENDING);
- UpdateServiceStatus(SERVICE_RUNNING);
- return ERROR_SUCCESS;
-
- case SERVICE_CONTROL_INTERROGATE:
- SetServiceStatus(ServiceStatusHandle,
- &ServiceStatus);
- return ERROR_SUCCESS;
-
- case SERVICE_CONTROL_SHUTDOWN:
- UpdateServiceStatus(SERVICE_STOP_PENDING);
- UpdateServiceStatus(SERVICE_STOPPED);
- return ERROR_SUCCESS;
-
- default :
- return ERROR_CALL_NOT_IMPLEMENTED;
- }
-}
-
-
-VOID NTAPI
-ServiceMain(DWORD argc, LPWSTR *argv)
-{
- ServiceStatusHandle = RegisterServiceCtrlHandlerExW(ServiceName,
- ServiceControlHandler,
- NULL);
- if (!ServiceStatusHandle)
- {
- DbgPrint("DHCPCSVC: Unable to register service control handler (%x)\n", GetLastError);
- return;
- }
-
- UpdateServiceStatus(SERVICE_START_PENDING);
-
- ApiInit();
- AdapterInit();
-
- tzset();
-
- memset(&sockaddr_broadcast, 0, sizeof(sockaddr_broadcast));
- sockaddr_broadcast.sin_family = AF_INET;
- sockaddr_broadcast.sin_port = htons(REMOTE_PORT);
- sockaddr_broadcast.sin_addr.s_addr = INADDR_BROADCAST;
- inaddr_any.s_addr = INADDR_ANY;
- bootp_packet_handler = do_packet;
-
- if (PipeInit() == INVALID_HANDLE_VALUE)
- {
- DbgPrint("DHCPCSVC: PipeInit() failed!\n");
- AdapterStop();
- ApiFree();
- UpdateServiceStatus(SERVICE_STOPPED);
- }
-
- DH_DbgPrint(MID_TRACE,("DHCP Service Started\n"));
-
- UpdateServiceStatus(SERVICE_RUNNING);
-
- DH_DbgPrint(MID_TRACE,("Going into dispatch()\n"));
-
- DbgPrint("DHCPCSVC: DHCP service is starting up\n");
-
- dispatch();
-
- DbgPrint("DHCPCSVC: DHCP service is shutting down\n");
-
- //AdapterStop();
- //ApiFree();
- /* FIXME: Close pipe and kill pipe thread */
-
- UpdateServiceStatus(SERVICE_STOPPED);
-}
-
-/*
- * Individual States:
- *
- * Each routine is called from the dhclient_state_machine() in one of
- * these conditions:
- * -> entering INIT state
- * -> recvpacket_flag == 0: timeout in this state
- * -> otherwise: received a packet in this state
- *
- * Return conditions as handled by dhclient_state_machine():
- * Returns 1, sendpacket_flag = 1: send packet, reset timer.
- * Returns 1, sendpacket_flag = 0: just reset the timer (wait for a milestone).
- * Returns 0: finish the nap which was interrupted for no good reason.
- *
- * Several per-interface variables are used to keep track of the process:
- * active_lease: the lease that is being used on the interface
- * (null pointer if not configured yet).
- * offered_leases: leases corresponding to DHCPOFFER messages that have
- * been sent to us by DHCP servers.
- * acked_leases: leases corresponding to DHCPACK messages that have been
- * sent to us by DHCP servers.
- * sendpacket: DHCP packet we're trying to send.
- * destination: IP address to send sendpacket to
- * In addition, there are several relevant per-lease variables.
- * T1_expiry, T2_expiry, lease_expiry: lease milestones
- * In the active lease, these control the process of renewing the lease;
- * In leases on the acked_leases list, this simply determines when we
- * can no longer legitimately use the lease.
- */
-
-void
-state_reboot(void *ipp)
-{
- struct interface_info *ip = ipp;
- ULONG foo = (ULONG) GetTickCount();
-
- /* If we don't remember an active lease, go straight to INIT. */
- if (!ip->client->active || ip->client->active->is_bootp) {
- state_init(ip);
- return;
- }
-
- /* We are in the rebooting state. */
- ip->client->state = S_REBOOTING;
-
- /* make_request doesn't initialize xid because it normally comes
- from the DHCPDISCOVER, but we haven't sent a DHCPDISCOVER,
- so pick an xid now. */
- ip->client->xid = RtlRandom(&foo);
-
- /* Make a DHCPREQUEST packet, and set appropriate per-interface
- flags. */
- make_request(ip, ip->client->active);
- ip->client->destination = iaddr_broadcast;
- time(&ip->client->first_sending);
- ip->client->interval = ip->client->config->initial_interval;
-
- /* Zap the medium list... */
- ip->client->medium = NULL;
-
- /* Send out the first DHCPREQUEST packet. */
- send_request(ip);
-}
-
-/*
- * Called when a lease has completely expired and we've
- * been unable to renew it.
- */
-void
-state_init(void *ipp)
-{
- struct interface_info *ip = ipp;
-
- ASSERT_STATE(state, S_INIT);
-
- /* Make a DHCPDISCOVER packet, and set appropriate per-interface
- flags. */
- make_discover(ip, ip->client->active);
- ip->client->xid = ip->client->packet.xid;
- ip->client->destination = iaddr_broadcast;
- ip->client->state = S_SELECTING;
- time(&ip->client->first_sending);
- ip->client->interval = ip->client->config->initial_interval;
-
- /* Add an immediate timeout to cause the first DHCPDISCOVER packet
- to go out. */
- send_discover(ip);
-}
-
-/*
- * state_selecting is called when one or more DHCPOFFER packets
- * have been received and a configurable period of time has passed.
- */
-void
-state_selecting(void *ipp)
-{
- struct interface_info *ip = ipp;
- struct client_lease *lp, *next, *picked;
- time_t cur_time;
-
- ASSERT_STATE(state, S_SELECTING);
-
- time(&cur_time);
-
- /* Cancel state_selecting and send_discover timeouts, since either
- one could have got us here. */
- cancel_timeout(state_selecting, ip);
- cancel_timeout(send_discover, ip);
-
- /* We have received one or more DHCPOFFER packets. Currently,
- the only criterion by which we judge leases is whether or
- not we get a response when we arp for them. */
- picked = NULL;
- for (lp = ip->client->offered_leases; lp; lp = next) {
- next = lp->next;
-
- /* Check to see if we got an ARPREPLY for the address
- in this particular lease. */
- if (!picked) {
- if( !check_arp(ip,lp) ) goto freeit;
- picked = lp;
- picked->next = NULL;
- } else {
-freeit:
- free_client_lease(lp);
- }
- }
- ip->client->offered_leases = NULL;
-
- /* If we just tossed all the leases we were offered, go back
- to square one. */
- if (!picked) {
- ip->client->state = S_INIT;
- state_init(ip);
- return;
- }
-
- /* If it was a BOOTREPLY, we can just take the address right now. */
- if (!picked->options[DHO_DHCP_MESSAGE_TYPE].len) {
- ip->client->new = picked;
-
- /* Make up some lease expiry times
- XXX these should be configurable. */
- ip->client->new->expiry = cur_time + 12000;
- ip->client->new->renewal += cur_time + 8000;
- ip->client->new->rebind += cur_time + 10000;
-
- ip->client->state = S_REQUESTING;
-
- /* Bind to the address we received. */
- bind_lease(ip);
- return;
- }
-
- /* Go to the REQUESTING state. */
- ip->client->destination = iaddr_broadcast;
- ip->client->state = S_REQUESTING;
- ip->client->first_sending = cur_time;
- ip->client->interval = ip->client->config->initial_interval;
-
- /* Make a DHCPREQUEST packet from the lease we picked. */
- make_request(ip, picked);
- ip->client->xid = ip->client->packet.xid;
-
- /* Toss the lease we picked - we'll get it back in a DHCPACK. */
- free_client_lease(picked);
-
- /* Add an immediate timeout to send the first DHCPREQUEST packet. */
- send_request(ip);
-}
-
-/* state_requesting is called when we receive a DHCPACK message after
- having sent out one or more DHCPREQUEST packets. */
-
-void
-dhcpack(struct packet *packet)
-{
- struct interface_info *ip = packet->interface;
- struct client_lease *lease;
- 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 (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("DHCPACK from %s", piaddr(packet->client_addr));
-
- lease = packet_to_lease(packet);
- if (!lease) {
- note("packet_to_lease failed.");
- return;
- }
-
- ip->client->new = lease;
-
- /* Stop resending DHCPREQUEST. */
- cancel_timeout(send_request, ip);
-
- /* Figure out the lease time. */
- if (ip->client->new->options[DHO_DHCP_LEASE_TIME].data)
- ip->client->new->expiry = getULong(
- ip->client->new->options[DHO_DHCP_LEASE_TIME].data);
- else
- ip->client->new->expiry = DHCP_DEFAULT_LEASE_TIME;
- /* A number that looks negative here is really just very large,
- because the lease expiry offset is unsigned. */
- if (ip->client->new->expiry < 0)
- ip->client->new->expiry = TIME_MAX;
- /* XXX should be fixed by resetting the client state */
- if (ip->client->new->expiry < 60)
- ip->client->new->expiry = 60;
-
- /* Take the server-provided renewal time if there is one;
- otherwise figure it out according to the spec. */
- if (ip->client->new->options[DHO_DHCP_RENEWAL_TIME].len)
- ip->client->new->renewal = getULong(
- ip->client->new->options[DHO_DHCP_RENEWAL_TIME].data);
- else
- ip->client->new->renewal = ip->client->new->expiry / 2;
-
- /* Same deal with the rebind time. */
- if (ip->client->new->options[DHO_DHCP_REBINDING_TIME].len)
- ip->client->new->rebind = getULong(
- ip->client->new->options[DHO_DHCP_REBINDING_TIME].data);
- else
- ip->client->new->rebind = ip->client->new->renewal +
- ip->client->new->renewal / 2 + ip->client->new->renewal / 4;
-
-#ifdef __REACTOS__
- ip->client->new->obtained = cur_time;
-#endif
- ip->client->new->expiry += cur_time;
- /* Lease lengths can never be negative. */
- if (ip->client->new->expiry < cur_time)
- ip->client->new->expiry = TIME_MAX;
- ip->client->new->renewal += cur_time;
- if (ip->client->new->renewal < cur_time)
- ip->client->new->renewal = TIME_MAX;
- ip->client->new->rebind += cur_time;
- if (ip->client->new->rebind < cur_time)
- ip->client->new->rebind = TIME_MAX;
-
- bind_lease(ip);
-}
-
-void set_name_servers( PDHCP_ADAPTER Adapter, struct client_lease *new_lease ) {
- CHAR Buffer[200] = "SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Interfaces\\";
- HKEY RegKey;
-
- strcat(Buffer, Adapter->DhclientInfo.name);
- if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, Buffer, 0, KEY_WRITE, &RegKey ) != ERROR_SUCCESS)
- return;
-
-
- if( new_lease->options[DHO_DOMAIN_NAME_SERVERS].len ) {
-
- struct iaddr nameserver;
- char *nsbuf;
- int i, addrs =
- new_lease->options[DHO_DOMAIN_NAME_SERVERS].len / sizeof(ULONG);
-
- nsbuf = malloc( addrs * sizeof(IP_ADDRESS_STRING) );
-
- if( nsbuf) {
- nsbuf[0] = 0;
- for( i = 0; i < addrs; i++ ) {
- nameserver.len = sizeof(ULONG);
- memcpy( nameserver.iabuf,
- new_lease->options[DHO_DOMAIN_NAME_SERVERS].data +
- (i * sizeof(ULONG)), sizeof(ULONG) );
- strcat( nsbuf, piaddr(nameserver) );
- if( i != addrs-1 ) strcat( nsbuf, "," );
- }
-
- DH_DbgPrint(MID_TRACE,("Setting DhcpNameserver: %s\n", nsbuf));
-
- RegSetValueExA( RegKey, "DhcpNameServer", 0, REG_SZ,
- (LPBYTE)nsbuf, strlen(nsbuf) + 1 );
- free( nsbuf );
- }
-
- } else {
- RegDeleteValueW( RegKey, L"DhcpNameServer" );
- }
-
- RegCloseKey( RegKey );
-
-}
-
-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 );
-
- /* 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);
- RegSetValueExA(hkey, "IPAddress", 0, REG_SZ, (LPBYTE)"0.0.0.0", 8);
- RegSetValueExA(hkey, "SubnetMask", 0, REG_SZ, (LPBYTE)"0.0.0.0", 8);
- 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);
- RegSetValueExA(hkey, "DefaultGateway", 0, REG_SZ, (LPBYTE)"0.0.0.0", 8);
- }
- }
-
- 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 );
-}
-
-/*
- * 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);
- return;
- }
-
- /* 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;
- time_t cur_time;
-
- time(&cur_time);
-
- note("No DHCPOFFERS received.");
-
- note("No working leases in persistent database - sleeping.\n");
- ip->client->state = S_INIT;
- add_timeout(cur_time + ip->client->config->retry_interval, state_init,
- ip);
- /* XXX Take any failure actions necessary */
-}
-
-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 );
-
- 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>";
-}
-