| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | NBT netbios routines and daemon - version 2
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| 4 | Copyright (C) Andrew Tridgell 1994-1998
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| 5 | Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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| 6 | Copyright (C) Jeremy Allison 1994-2003
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 3 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 20 |
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| 21 | */
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| 22 |
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| 23 | #include "includes.h"
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| 24 | #include "nmbd/nmbd.h"
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| 25 |
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| 26 | /* This is our local master browser list database. */
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| 27 | extern struct browse_cache_record *lmb_browserlist;
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| 28 |
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| 29 | /****************************************************************************
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| 30 | As a domain master browser, do a sync with a local master browser.
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| 31 | **************************************************************************/
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| 32 |
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| 33 | static void sync_with_lmb(struct browse_cache_record *browc)
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| 34 | {
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| 35 | struct work_record *work;
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| 36 |
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| 37 | if( !(work = find_workgroup_on_subnet(unicast_subnet, browc->work_group)) ) {
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| 38 | if( DEBUGLVL( 0 ) ) {
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| 39 | dbgtext( "sync_with_lmb:\n" );
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| 40 | dbgtext( "Failed to get a workgroup for a local master browser " );
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| 41 | dbgtext( "cache entry workgroup " );
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| 42 | dbgtext( "%s, server %s\n", browc->work_group, browc->lmb_name );
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| 43 | }
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| 44 | return;
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| 45 | }
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| 46 |
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| 47 | /* We should only be doing this if we are a domain master browser for
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| 48 | the given workgroup. Ensure this is so. */
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| 49 |
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| 50 | if(!AM_DOMAIN_MASTER_BROWSER(work)) {
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| 51 | if( DEBUGLVL( 0 ) ) {
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| 52 | dbgtext( "sync_with_lmb:\n" );
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| 53 | dbgtext( "We are trying to sync with a local master browser " );
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| 54 | dbgtext( "%s for workgroup %s\n", browc->lmb_name, browc->work_group );
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| 55 | dbgtext( "and we are not a domain master browser on this workgroup.\n" );
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| 56 | dbgtext( "Error!\n" );
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| 57 | }
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| 58 | return;
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| 59 | }
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| 60 |
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| 61 | if( DEBUGLVL( 2 ) ) {
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| 62 | dbgtext( "sync_with_lmb:\n" );
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| 63 | dbgtext( "Initiating sync with local master browser " );
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| 64 | dbgtext( "%s<0x20> at IP %s ", browc->lmb_name, inet_ntoa(browc->ip) );
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| 65 | dbgtext( "for workgroup %s\n", browc->work_group );
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| 66 | }
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| 67 |
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| 68 | sync_browse_lists(work, browc->lmb_name, 0x20, browc->ip, True, True);
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| 69 |
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| 70 | browc->sync_time += (CHECK_TIME_DMB_TO_LMB_SYNC * 60);
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| 71 | }
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| 72 |
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| 73 | /****************************************************************************
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| 74 | Sync or expire any local master browsers.
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| 75 | **************************************************************************/
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| 76 |
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| 77 | void dmb_expire_and_sync_browser_lists(time_t t)
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| 78 | {
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| 79 | static time_t last_run = 0;
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| 80 | struct browse_cache_record *browc;
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| 81 |
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| 82 | /* Only do this every 20 seconds. */
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| 83 | if (t - last_run < 20)
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| 84 | return;
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| 85 |
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| 86 | last_run = t;
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| 87 |
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| 88 | expire_lmb_browsers(t);
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| 89 |
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| 90 | for( browc = lmb_browserlist; browc; browc = browc->next ) {
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| 91 | if (browc->sync_time < t)
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| 92 | sync_with_lmb(browc);
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| 93 | }
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| 94 | }
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| 95 |
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| 96 | /****************************************************************************
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| 97 | As a local master browser, send an announce packet to the domain master browser.
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| 98 | **************************************************************************/
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| 99 |
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| 100 | static void announce_local_master_browser_to_domain_master_browser( struct work_record *work)
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| 101 | {
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| 102 | char outbuf[1024];
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| 103 | unstring myname;
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| 104 | unstring dmb_name;
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| 105 | char *p;
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| 106 |
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| 107 | if(ismyip_v4(work->dmb_addr)) {
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| 108 | if( DEBUGLVL( 2 ) ) {
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| 109 | dbgtext( "announce_local_master_browser_to_domain_master_browser:\n" );
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| 110 | dbgtext( "We are both a domain and a local master browser for " );
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| 111 | dbgtext( "workgroup %s. ", work->work_group );
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| 112 | dbgtext( "Do not announce to ourselves.\n" );
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| 113 | }
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| 114 | return;
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| 115 | }
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| 116 |
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| 117 | memset(outbuf,'\0',sizeof(outbuf));
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| 118 | p = outbuf;
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| 119 | SCVAL(p,0,ANN_MasterAnnouncement);
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| 120 | p++;
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| 121 |
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| 122 | unstrcpy(myname, global_myname());
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| 123 | strupper_m(myname);
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| 124 | myname[15]='\0';
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| 125 | /* The call below does CH_UNIX -> CH_DOS conversion. JRA */
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| 126 | push_ascii(p, myname, sizeof(outbuf)-PTR_DIFF(p,outbuf)-1, STR_TERMINATE);
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| 127 |
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| 128 | p = skip_string(outbuf,sizeof(outbuf),p);
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| 129 |
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| 130 | if( DEBUGLVL( 4 ) ) {
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| 131 | dbgtext( "announce_local_master_browser_to_domain_master_browser:\n" );
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| 132 | dbgtext( "Sending local master announce to " );
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| 133 | dbgtext( "%s for workgroup %s.\n", nmb_namestr(&work->dmb_name),
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| 134 | work->work_group );
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| 135 | }
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| 136 |
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| 137 | /* Target name for send_mailslot must be in UNIX charset. */
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| 138 | pull_ascii_nstring(dmb_name, sizeof(dmb_name), work->dmb_name.name);
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| 139 | send_mailslot(True, BROWSE_MAILSLOT, outbuf,PTR_DIFF(p,outbuf),
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| 140 | global_myname(), 0x0, dmb_name, 0x0,
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| 141 | work->dmb_addr, FIRST_SUBNET->myip, DGRAM_PORT);
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| 142 | }
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| 143 |
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| 144 | /****************************************************************************
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| 145 | As a local master browser, do a sync with a domain master browser.
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| 146 | **************************************************************************/
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| 147 |
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| 148 | static void sync_with_dmb(struct work_record *work)
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| 149 | {
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| 150 | unstring dmb_name;
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| 151 |
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| 152 | if( DEBUGLVL( 2 ) ) {
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| 153 | dbgtext( "sync_with_dmb:\n" );
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| 154 | dbgtext( "Initiating sync with domain master browser " );
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| 155 | dbgtext( "%s ", nmb_namestr(&work->dmb_name) );
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| 156 | dbgtext( "at IP %s ", inet_ntoa(work->dmb_addr) );
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| 157 | dbgtext( "for workgroup %s\n", work->work_group );
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| 158 | }
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| 159 |
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| 160 | pull_ascii_nstring(dmb_name, sizeof(dmb_name), work->dmb_name.name);
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| 161 | sync_browse_lists(work, dmb_name, work->dmb_name.name_type,
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| 162 | work->dmb_addr, False, True);
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| 163 | }
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| 164 |
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| 165 | /****************************************************************************
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| 166 | Function called when a node status query to a domain master browser IP succeeds.
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| 167 | ****************************************************************************/
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| 168 |
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| 169 | static void domain_master_node_status_success(struct subnet_record *subrec,
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| 170 | struct userdata_struct *userdata,
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| 171 | struct res_rec *answers,
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| 172 | struct in_addr from_ip)
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| 173 | {
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| 174 | struct work_record *work = find_workgroup_on_subnet( subrec, userdata->data);
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| 175 |
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| 176 | if( work == NULL ) {
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| 177 | if( DEBUGLVL( 0 ) ) {
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| 178 | dbgtext( "domain_master_node_status_success:\n" );
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| 179 | dbgtext( "Unable to find workgroup " );
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| 180 | dbgtext( "%s on subnet %s.\n", userdata->data, subrec->subnet_name );
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| 181 | }
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| 182 | return;
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| 183 | }
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| 184 |
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| 185 | if( DEBUGLVL( 3 ) ) {
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| 186 | dbgtext( "domain_master_node_status_success:\n" );
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| 187 | dbgtext( "Success in node status for workgroup " );
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| 188 | dbgtext( "%s from ip %s\n", work->work_group, inet_ntoa(from_ip) );
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| 189 | }
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| 190 |
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| 191 | /* Go through the list of names found at answers->rdata and look for
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| 192 | the first SERVER<0x20> name. */
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| 193 |
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| 194 | if(answers->rdata != NULL) {
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| 195 | char *p = answers->rdata;
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| 196 | int numnames = CVAL(p, 0);
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| 197 |
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| 198 | p += 1;
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| 199 |
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| 200 | while (numnames--) {
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| 201 | unstring qname;
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| 202 | uint16 nb_flags;
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| 203 | int name_type;
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| 204 |
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| 205 | pull_ascii_nstring(qname, sizeof(qname), p);
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| 206 | name_type = CVAL(p,15);
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| 207 | nb_flags = get_nb_flags(&p[16]);
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| 208 | trim_char(qname,'\0',' ');
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| 209 |
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| 210 | p += 18;
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| 211 |
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| 212 | if(!(nb_flags & NB_GROUP) && (name_type == 0x20)) {
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| 213 | struct nmb_name nmbname;
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| 214 |
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| 215 | make_nmb_name(&nmbname, qname, name_type);
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| 216 |
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| 217 | /* Copy the dmb name and IP address
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| 218 | into the workgroup struct. */
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| 219 |
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| 220 | work->dmb_name = nmbname;
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| 221 | putip((char *)&work->dmb_addr, &from_ip);
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| 222 |
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| 223 | /* Do the local master browser announcement to the domain
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| 224 | master browser name and IP. */
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| 225 | announce_local_master_browser_to_domain_master_browser( work );
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| 226 |
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| 227 | /* Now synchronise lists with the domain master browser. */
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| 228 | sync_with_dmb(work);
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| 229 | break;
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| 230 | }
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| 231 | }
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| 232 | } else if( DEBUGLVL( 0 ) ) {
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| 233 | dbgtext( "domain_master_node_status_success:\n" );
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| 234 | dbgtext( "Failed to find a SERVER<0x20> name in reply from IP " );
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| 235 | dbgtext( "%s.\n", inet_ntoa(from_ip) );
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| 236 | }
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| 237 | }
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| 238 |
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| 239 | /****************************************************************************
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| 240 | Function called when a node status query to a domain master browser IP fails.
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| 241 | ****************************************************************************/
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| 242 |
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| 243 | static void domain_master_node_status_fail(struct subnet_record *subrec,
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| 244 | struct response_record *rrec)
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| 245 | {
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| 246 | struct userdata_struct *userdata = rrec->userdata;
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| 247 |
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| 248 | if( DEBUGLVL( 0 ) ) {
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| 249 | dbgtext( "domain_master_node_status_fail:\n" );
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| 250 | dbgtext( "Doing a node status request to the domain master browser\n" );
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| 251 | dbgtext( "for workgroup %s ", userdata ? userdata->data : "NULL" );
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| 252 | dbgtext( "at IP %s failed.\n", inet_ntoa(rrec->packet->ip) );
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| 253 | dbgtext( "Cannot sync browser lists.\n" );
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| 254 | }
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| 255 | }
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| 256 |
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| 257 | /****************************************************************************
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| 258 | Function called when a query for a WORKGROUP<1b> name succeeds.
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| 259 | ****************************************************************************/
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| 260 |
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| 261 | static void find_domain_master_name_query_success(struct subnet_record *subrec,
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| 262 | struct userdata_struct *userdata_in,
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| 263 | struct nmb_name *q_name, struct in_addr answer_ip, struct res_rec *rrec)
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| 264 | {
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| 265 | /*
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| 266 | * Unfortunately, finding the IP address of the Domain Master Browser,
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| 267 | * as we have here, is not enough. We need to now do a sync to the
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| 268 | * SERVERNAME<0x20> NetBIOS name, as only recent NT servers will
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| 269 | * respond to the SMBSERVER name. To get this name from IP
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| 270 | * address we do a Node status request, and look for the first
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| 271 | * NAME<0x20> in the response, and take that as the server name.
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| 272 | * We also keep a cache of the Domain Master Browser name for this
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| 273 | * workgroup in the Workgroup struct, so that if the same IP addess
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| 274 | * is returned every time, we don't need to do the node status
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| 275 | * request.
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| 276 | */
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| 277 |
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| 278 | struct work_record *work;
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| 279 | struct nmb_name nmbname;
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| 280 | struct userdata_struct *userdata;
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| 281 | size_t size = sizeof(struct userdata_struct) + sizeof(fstring)+1;
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| 282 | unstring qname;
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| 283 |
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| 284 | pull_ascii_nstring(qname, sizeof(qname), q_name->name);
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| 285 | if( !(work = find_workgroup_on_subnet(subrec, qname)) ) {
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| 286 | if( DEBUGLVL( 0 ) ) {
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| 287 | dbgtext( "find_domain_master_name_query_success:\n" );
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| 288 | dbgtext( "Failed to find workgroup %s\n", qname);
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| 289 | }
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| 290 | return;
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| 291 | }
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| 292 |
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| 293 | /* First check if we already have a dmb for this workgroup. */
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| 294 |
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| 295 | if(!is_zero_ip_v4(work->dmb_addr) && ip_equal_v4(work->dmb_addr, answer_ip)) {
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| 296 | /* Do the local master browser announcement to the domain
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| 297 | master browser name and IP. */
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| 298 | announce_local_master_browser_to_domain_master_browser( work );
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| 299 |
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| 300 | /* Now synchronise lists with the domain master browser. */
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| 301 | sync_with_dmb(work);
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| 302 | return;
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| 303 | } else {
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| 304 | zero_ip_v4(&work->dmb_addr);
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| 305 | }
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| 306 |
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| 307 | /* Now initiate the node status request. */
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| 308 |
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| 309 | /* We used to use the name "*",0x0 here, but some Windows
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| 310 | * servers don't answer that name. However we *know* they
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| 311 | * have the name workgroup#1b (as we just looked it up).
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| 312 | * So do the node status request on this name instead.
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| 313 | * Found at LBL labs. JRA.
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| 314 | */
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| 315 |
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| 316 | make_nmb_name(&nmbname,work->work_group,0x1b);
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| 317 |
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| 318 | /* Put the workgroup name into the userdata so we know
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| 319 | what workgroup we're talking to when the reply comes
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| 320 | back. */
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| 321 |
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| 322 | /* Setup the userdata_struct - this is copied so we can use
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| 323 | a stack variable for this. */
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| 324 |
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| 325 | if((userdata = (struct userdata_struct *)SMB_MALLOC(size)) == NULL) {
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| 326 | DEBUG(0, ("find_domain_master_name_query_success: malloc fail.\n"));
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| 327 | return;
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| 328 | }
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| 329 |
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| 330 | userdata->copy_fn = NULL;
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| 331 | userdata->free_fn = NULL;
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| 332 | userdata->userdata_len = strlen(work->work_group)+1;
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| 333 | overmalloc_safe_strcpy(userdata->data, work->work_group, size - sizeof(*userdata) - 1);
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| 334 |
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| 335 | node_status( subrec, &nmbname, answer_ip,
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| 336 | domain_master_node_status_success,
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| 337 | domain_master_node_status_fail,
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| 338 | userdata);
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| 339 |
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| 340 | zero_free(userdata, size);
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| 341 | }
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| 342 |
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| 343 | /****************************************************************************
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| 344 | Function called when a query for a WORKGROUP<1b> name fails.
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| 345 | ****************************************************************************/
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| 346 |
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| 347 | static void find_domain_master_name_query_fail(struct subnet_record *subrec,
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| 348 | struct response_record *rrec,
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| 349 | struct nmb_name *question_name, int fail_code)
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| 350 | {
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| 351 | if( DEBUGLVL( 0 ) ) {
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| 352 | dbgtext( "find_domain_master_name_query_fail:\n" );
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| 353 | dbgtext( "Unable to find the Domain Master Browser name " );
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| 354 | dbgtext( "%s for the workgroup %s.\n",
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| 355 | nmb_namestr(question_name), question_name->name );
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| 356 | dbgtext( "Unable to sync browse lists in this workgroup.\n" );
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| 357 | }
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| 358 | }
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| 359 |
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| 360 | /****************************************************************************
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| 361 | As a local master browser for a workgroup find the domain master browser
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| 362 | name, announce ourselves as local master browser to it and then pull the
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| 363 | full domain browse lists from it onto the given subnet.
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| 364 | **************************************************************************/
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| 365 |
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| 366 | void announce_and_sync_with_domain_master_browser( struct subnet_record *subrec,
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| 367 | struct work_record *work)
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| 368 | {
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| 369 | /* Only do this if we are using a WINS server. */
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| 370 | if(we_are_a_wins_client() == False) {
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| 371 | if( DEBUGLVL( 10 ) ) {
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| 372 | dbgtext( "announce_and_sync_with_domain_master_browser:\n" );
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| 373 | dbgtext( "Ignoring, as we are not a WINS client.\n" );
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| 374 | }
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| 375 | return;
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| 376 | }
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| 377 |
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| 378 | /* First, query for the WORKGROUP<1b> name from the WINS server. */
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| 379 | query_name(unicast_subnet, work->work_group, 0x1b,
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| 380 | find_domain_master_name_query_success,
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| 381 | find_domain_master_name_query_fail,
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| 382 | NULL);
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| 383 | }
|
|---|
| 384 |
|
|---|
| 385 | /****************************************************************************
|
|---|
| 386 | Function called when a node status query to a domain master browser IP succeeds.
|
|---|
| 387 | This function is only called on query to a Samba 1.9.18 or above WINS server.
|
|---|
| 388 |
|
|---|
| 389 | Note that adding the workgroup name is enough for this workgroup to be
|
|---|
| 390 | browsable by clients, as clients query the WINS server or broadcast
|
|---|
| 391 | nets for the WORKGROUP<1b> name when they want to browse a workgroup
|
|---|
| 392 | they are not in. We do not need to do a sync with this Domain Master
|
|---|
| 393 | Browser in order for our browse clients to see machines in this workgroup.
|
|---|
| 394 | JRA.
|
|---|
| 395 | ****************************************************************************/
|
|---|
| 396 |
|
|---|
| 397 | static void get_domain_master_name_node_status_success(struct subnet_record *subrec,
|
|---|
| 398 | struct userdata_struct *userdata,
|
|---|
| 399 | struct res_rec *answers,
|
|---|
| 400 | struct in_addr from_ip)
|
|---|
| 401 | {
|
|---|
| 402 | struct work_record *work;
|
|---|
| 403 | unstring server_name;
|
|---|
| 404 |
|
|---|
| 405 | server_name[0] = 0;
|
|---|
| 406 |
|
|---|
| 407 | if( DEBUGLVL( 3 ) ) {
|
|---|
| 408 | dbgtext( "get_domain_master_name_node_status_success:\n" );
|
|---|
| 409 | dbgtext( "Success in node status from ip %s\n", inet_ntoa(from_ip) );
|
|---|
| 410 | }
|
|---|
| 411 |
|
|---|
| 412 | /*
|
|---|
| 413 | * Go through the list of names found at answers->rdata and look for
|
|---|
| 414 | * the first WORKGROUP<0x1b> name.
|
|---|
| 415 | */
|
|---|
| 416 |
|
|---|
| 417 | if(answers->rdata != NULL) {
|
|---|
| 418 | char *p = answers->rdata;
|
|---|
| 419 | int numnames = CVAL(p, 0);
|
|---|
| 420 |
|
|---|
| 421 | p += 1;
|
|---|
| 422 |
|
|---|
| 423 | while (numnames--) {
|
|---|
| 424 | unstring qname;
|
|---|
| 425 | uint16 nb_flags;
|
|---|
| 426 | int name_type;
|
|---|
| 427 |
|
|---|
| 428 | pull_ascii_nstring(qname, sizeof(qname), p);
|
|---|
| 429 | name_type = CVAL(p,15);
|
|---|
| 430 | nb_flags = get_nb_flags(&p[16]);
|
|---|
| 431 | trim_char(qname,'\0',' ');
|
|---|
| 432 |
|
|---|
| 433 | p += 18;
|
|---|
| 434 |
|
|---|
| 435 | if(!(nb_flags & NB_GROUP) && (name_type == 0x00) &&
|
|---|
| 436 | server_name[0] == 0) {
|
|---|
| 437 | /* this is almost certainly the server netbios name */
|
|---|
| 438 | unstrcpy(server_name, qname);
|
|---|
| 439 | continue;
|
|---|
| 440 | }
|
|---|
| 441 |
|
|---|
| 442 | if(!(nb_flags & NB_GROUP) && (name_type == 0x1b)) {
|
|---|
| 443 | if( DEBUGLVL( 5 ) ) {
|
|---|
| 444 | dbgtext( "get_domain_master_name_node_status_success:\n" );
|
|---|
| 445 | dbgtext( "%s(%s) ", server_name, inet_ntoa(from_ip) );
|
|---|
| 446 | dbgtext( "is a domain master browser for workgroup " );
|
|---|
| 447 | dbgtext( "%s. Adding this name.\n", qname );
|
|---|
| 448 | }
|
|---|
| 449 |
|
|---|
| 450 | /*
|
|---|
| 451 | * If we don't already know about this workgroup, add it
|
|---|
| 452 | * to the workgroup list on the unicast_subnet.
|
|---|
| 453 | */
|
|---|
| 454 |
|
|---|
| 455 | if((work = find_workgroup_on_subnet( subrec, qname)) == NULL) {
|
|---|
| 456 | struct nmb_name nmbname;
|
|---|
| 457 | /*
|
|---|
| 458 | * Add it - with an hour in the cache.
|
|---|
| 459 | */
|
|---|
| 460 | if(!(work= create_workgroup_on_subnet(subrec, qname, 60*60)))
|
|---|
| 461 | return;
|
|---|
| 462 |
|
|---|
| 463 | /* remember who the master is */
|
|---|
| 464 | unstrcpy(work->local_master_browser_name, server_name);
|
|---|
| 465 | make_nmb_name(&nmbname, server_name, 0x20);
|
|---|
| 466 | work->dmb_name = nmbname;
|
|---|
| 467 | work->dmb_addr = from_ip;
|
|---|
| 468 | }
|
|---|
| 469 | break;
|
|---|
| 470 | }
|
|---|
| 471 | }
|
|---|
| 472 | } else if( DEBUGLVL( 0 ) ) {
|
|---|
| 473 | dbgtext( "get_domain_master_name_node_status_success:\n" );
|
|---|
| 474 | dbgtext( "Failed to find a WORKGROUP<0x1b> name in reply from IP " );
|
|---|
| 475 | dbgtext( "%s.\n", inet_ntoa(from_ip) );
|
|---|
| 476 | }
|
|---|
| 477 | }
|
|---|
| 478 |
|
|---|
| 479 | /****************************************************************************
|
|---|
| 480 | Function called when a node status query to a domain master browser IP fails.
|
|---|
| 481 | ****************************************************************************/
|
|---|
| 482 |
|
|---|
| 483 | static void get_domain_master_name_node_status_fail(struct subnet_record *subrec,
|
|---|
| 484 | struct response_record *rrec)
|
|---|
| 485 | {
|
|---|
| 486 | if( DEBUGLVL( 0 ) ) {
|
|---|
| 487 | dbgtext( "get_domain_master_name_node_status_fail:\n" );
|
|---|
| 488 | dbgtext( "Doing a node status request to the domain master browser " );
|
|---|
| 489 | dbgtext( "at IP %s failed.\n", inet_ntoa(rrec->packet->ip) );
|
|---|
| 490 | dbgtext( "Cannot get workgroup name.\n" );
|
|---|
| 491 | }
|
|---|
| 492 | }
|
|---|
| 493 |
|
|---|
| 494 | /****************************************************************************
|
|---|
| 495 | Function called when a query for *<1b> name succeeds.
|
|---|
| 496 | ****************************************************************************/
|
|---|
| 497 |
|
|---|
| 498 | static void find_all_domain_master_names_query_success(struct subnet_record *subrec,
|
|---|
| 499 | struct userdata_struct *userdata_in,
|
|---|
| 500 | struct nmb_name *q_name, struct in_addr answer_ip, struct res_rec *rrec)
|
|---|
| 501 | {
|
|---|
| 502 | /*
|
|---|
| 503 | * We now have a list of all the domain master browsers for all workgroups
|
|---|
| 504 | * that have registered with the WINS server. Now do a node status request
|
|---|
| 505 | * to each one and look for the first 1b name in the reply. This will be
|
|---|
| 506 | * the workgroup name that we will add to the unicast subnet as a 'non-local'
|
|---|
| 507 | * workgroup.
|
|---|
| 508 | */
|
|---|
| 509 |
|
|---|
| 510 | struct nmb_name nmbname;
|
|---|
| 511 | struct in_addr send_ip;
|
|---|
| 512 | int i;
|
|---|
| 513 |
|
|---|
| 514 | if( DEBUGLVL( 5 ) ) {
|
|---|
| 515 | dbgtext( "find_all_domain_master_names_query_succes:\n" );
|
|---|
| 516 | dbgtext( "Got answer from WINS server of %d ", (rrec->rdlength / 6) );
|
|---|
| 517 | dbgtext( "IP addresses for Domain Master Browsers.\n" );
|
|---|
| 518 | }
|
|---|
| 519 |
|
|---|
| 520 | for(i = 0; i < rrec->rdlength / 6; i++) {
|
|---|
| 521 | /* Initiate the node status requests. */
|
|---|
| 522 | make_nmb_name(&nmbname, "*", 0);
|
|---|
| 523 |
|
|---|
| 524 | putip((char *)&send_ip, (char *)&rrec->rdata[(i*6) + 2]);
|
|---|
| 525 |
|
|---|
| 526 | /*
|
|---|
| 527 | * Don't send node status requests to ourself.
|
|---|
| 528 | */
|
|---|
| 529 |
|
|---|
| 530 | if(ismyip_v4( send_ip )) {
|
|---|
| 531 | if( DEBUGLVL( 5 ) ) {
|
|---|
| 532 | dbgtext( "find_all_domain_master_names_query_succes:\n" );
|
|---|
| 533 | dbgtext( "Not sending node status to our own IP " );
|
|---|
| 534 | dbgtext( "%s.\n", inet_ntoa(send_ip) );
|
|---|
| 535 | }
|
|---|
| 536 | continue;
|
|---|
| 537 | }
|
|---|
| 538 |
|
|---|
| 539 | if( DEBUGLVL( 5 ) ) {
|
|---|
| 540 | dbgtext( "find_all_domain_master_names_query_success:\n" );
|
|---|
| 541 | dbgtext( "Sending node status request to IP %s.\n", inet_ntoa(send_ip) );
|
|---|
| 542 | }
|
|---|
| 543 |
|
|---|
| 544 | node_status( subrec, &nmbname, send_ip,
|
|---|
| 545 | get_domain_master_name_node_status_success,
|
|---|
| 546 | get_domain_master_name_node_status_fail,
|
|---|
| 547 | NULL);
|
|---|
| 548 | }
|
|---|
| 549 | }
|
|---|
| 550 |
|
|---|
| 551 | /****************************************************************************
|
|---|
| 552 | Function called when a query for *<1b> name fails.
|
|---|
| 553 | ****************************************************************************/
|
|---|
| 554 | static void find_all_domain_master_names_query_fail(struct subnet_record *subrec,
|
|---|
| 555 | struct response_record *rrec,
|
|---|
| 556 | struct nmb_name *question_name, int fail_code)
|
|---|
| 557 | {
|
|---|
| 558 | if( DEBUGLVL( 10 ) ) {
|
|---|
| 559 | dbgtext( "find_domain_master_name_query_fail:\n" );
|
|---|
| 560 | dbgtext( "WINS server did not reply to a query for name " );
|
|---|
| 561 | dbgtext( "%s.\nThis means it ", nmb_namestr(question_name) );
|
|---|
| 562 | dbgtext( "is probably not a Samba 1.9.18 or above WINS server.\n" );
|
|---|
| 563 | }
|
|---|
| 564 | }
|
|---|
| 565 |
|
|---|
| 566 | /****************************************************************************
|
|---|
| 567 | If we are a domain master browser on the unicast subnet, do a query to the
|
|---|
| 568 | WINS server for the *<1b> name. This will only work to a Samba WINS server,
|
|---|
| 569 | so ignore it if we fail. If we succeed, contact each of the IP addresses in
|
|---|
| 570 | turn and do a node status request to them. If this succeeds then look for a
|
|---|
| 571 | <1b> name in the reply - this is the workgroup name. Add this to the unicast
|
|---|
| 572 | subnet. This is expensive, so we only do this every 15 minutes.
|
|---|
| 573 | **************************************************************************/
|
|---|
| 574 |
|
|---|
| 575 | void collect_all_workgroup_names_from_wins_server(time_t t)
|
|---|
| 576 | {
|
|---|
| 577 | static time_t lastrun = 0;
|
|---|
| 578 | struct work_record *work;
|
|---|
| 579 |
|
|---|
| 580 | /* Only do this if we are using a WINS server. */
|
|---|
| 581 | if(we_are_a_wins_client() == False)
|
|---|
| 582 | return;
|
|---|
| 583 |
|
|---|
| 584 | /* Check to see if we are a domain master browser on the unicast subnet. */
|
|---|
| 585 | if((work = find_workgroup_on_subnet( unicast_subnet, lp_workgroup())) == NULL) {
|
|---|
| 586 | if( DEBUGLVL( 0 ) ) {
|
|---|
| 587 | dbgtext( "collect_all_workgroup_names_from_wins_server:\n" );
|
|---|
| 588 | dbgtext( "Cannot find my workgroup %s ", lp_workgroup() );
|
|---|
| 589 | dbgtext( "on subnet %s.\n", unicast_subnet->subnet_name );
|
|---|
| 590 | }
|
|---|
| 591 | return;
|
|---|
| 592 | }
|
|---|
| 593 |
|
|---|
| 594 | if(!AM_DOMAIN_MASTER_BROWSER(work))
|
|---|
| 595 | return;
|
|---|
| 596 |
|
|---|
| 597 | if ((lastrun != 0) && (t < lastrun + (15 * 60)))
|
|---|
| 598 | return;
|
|---|
| 599 |
|
|---|
| 600 | lastrun = t;
|
|---|
| 601 |
|
|---|
| 602 | /* First, query for the *<1b> name from the WINS server. */
|
|---|
| 603 | query_name(unicast_subnet, "*", 0x1b,
|
|---|
| 604 | find_all_domain_master_names_query_success,
|
|---|
| 605 | find_all_domain_master_names_query_fail,
|
|---|
| 606 | NULL);
|
|---|
| 607 | }
|
|---|
| 608 |
|
|---|
| 609 |
|
|---|
| 610 | /****************************************************************************
|
|---|
| 611 | If we are a domain master browser on the unicast subnet, do a regular sync
|
|---|
| 612 | with all other DMBs that we know of on that subnet.
|
|---|
| 613 |
|
|---|
| 614 | To prevent exponential network traffic with large numbers of workgroups
|
|---|
| 615 | we use a randomised system where sync probability is inversely proportional
|
|---|
| 616 | to the number of known workgroups
|
|---|
| 617 | **************************************************************************/
|
|---|
| 618 |
|
|---|
| 619 | void sync_all_dmbs(time_t t)
|
|---|
| 620 | {
|
|---|
| 621 | static time_t lastrun = 0;
|
|---|
| 622 | struct work_record *work;
|
|---|
| 623 | int count=0;
|
|---|
| 624 |
|
|---|
| 625 | /* Only do this if we are using a WINS server. */
|
|---|
| 626 | if(we_are_a_wins_client() == False)
|
|---|
| 627 | return;
|
|---|
| 628 |
|
|---|
| 629 | /* Check to see if we are a domain master browser on the
|
|---|
| 630 | unicast subnet. */
|
|---|
| 631 | work = find_workgroup_on_subnet(unicast_subnet, lp_workgroup());
|
|---|
| 632 | if (!work)
|
|---|
| 633 | return;
|
|---|
| 634 |
|
|---|
| 635 | if (!AM_DOMAIN_MASTER_BROWSER(work))
|
|---|
| 636 | return;
|
|---|
| 637 |
|
|---|
| 638 | if ((lastrun != 0) && (t < lastrun + (5 * 60)))
|
|---|
| 639 | return;
|
|---|
| 640 |
|
|---|
| 641 | /* count how many syncs we might need to do */
|
|---|
| 642 | for (work=unicast_subnet->workgrouplist; work; work = work->next) {
|
|---|
| 643 | if (strcmp(lp_workgroup(), work->work_group)) {
|
|---|
| 644 | count++;
|
|---|
| 645 | }
|
|---|
| 646 | }
|
|---|
| 647 |
|
|---|
| 648 | /* leave if we don't have to do any syncs */
|
|---|
| 649 | if (count == 0) {
|
|---|
| 650 | return;
|
|---|
| 651 | }
|
|---|
| 652 |
|
|---|
| 653 | /* sync with a probability of 1/count */
|
|---|
| 654 | for (work=unicast_subnet->workgrouplist; work; work = work->next) {
|
|---|
| 655 | if (strcmp(lp_workgroup(), work->work_group)) {
|
|---|
| 656 | unstring dmb_name;
|
|---|
| 657 |
|
|---|
| 658 | if (((unsigned)sys_random()) % count != 0)
|
|---|
| 659 | continue;
|
|---|
| 660 |
|
|---|
| 661 | lastrun = t;
|
|---|
| 662 |
|
|---|
| 663 | if (!work->dmb_name.name[0]) {
|
|---|
| 664 | /* we don't know the DMB - assume it is
|
|---|
| 665 | the same as the unicast local master */
|
|---|
| 666 | make_nmb_name(&work->dmb_name,
|
|---|
| 667 | work->local_master_browser_name,
|
|---|
| 668 | 0x20);
|
|---|
| 669 | }
|
|---|
| 670 |
|
|---|
| 671 | pull_ascii_nstring(dmb_name, sizeof(dmb_name), work->dmb_name.name);
|
|---|
| 672 |
|
|---|
| 673 | DEBUG(3,("Initiating DMB<->DMB sync with %s(%s)\n",
|
|---|
| 674 | dmb_name, inet_ntoa(work->dmb_addr)));
|
|---|
| 675 |
|
|---|
| 676 | sync_browse_lists(work,
|
|---|
| 677 | dmb_name,
|
|---|
| 678 | work->dmb_name.name_type,
|
|---|
| 679 | work->dmb_addr, False, False);
|
|---|
| 680 | }
|
|---|
| 681 | }
|
|---|
| 682 | }
|
|---|