diff options
Diffstat (limited to 'source3/nmbd/nmbd_become_dmb.c')
| -rw-r--r-- | source3/nmbd/nmbd_become_dmb.c | 522 |
1 files changed, 256 insertions, 266 deletions
diff --git a/source3/nmbd/nmbd_become_dmb.c b/source3/nmbd/nmbd_become_dmb.c index 2e76e51f45..46d37fbb81 100644 --- a/source3/nmbd/nmbd_become_dmb.c +++ b/source3/nmbd/nmbd_become_dmb.c @@ -3,7 +3,7 @@ NBT netbios routines and daemon - version 2 Copyright (C) Andrew Tridgell 1994-1998 Copyright (C) Luke Kenneth Casson Leighton 1994-1998 - Copyright (C) Jeremy Allison 1994-1998 + Copyright (C) Jeremy Allison 1994-2003 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -37,36 +37,37 @@ static void become_domain_master_fail(struct subnet_record *subrec, struct response_record *rrec, struct nmb_name *fail_name) { - struct work_record *work = find_workgroup_on_subnet(subrec, fail_name->name); - struct server_record *servrec; - - if(!work) - { - DEBUG(0,("become_domain_master_fail: Error - cannot find \ -workgroup %s on subnet %s\n", fail_name->name, subrec->subnet_name)); - return; - } - - /* Set the state back to DOMAIN_NONE. */ - work->dom_state = DOMAIN_NONE; - - if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) - { - DEBUG(0,("become_domain_master_fail: Error - cannot find server %s \ + nstring failname; + struct work_record *work; + struct server_record *servrec; + + pull_ascii_nstring(failname, fail_name->name); + work = find_workgroup_on_subnet(subrec, failname); + if(!work) { + DEBUG(0,("become_domain_master_fail: Error - cannot find \ +workgroup %s on subnet %s\n", failname, subrec->subnet_name)); + return; + } + + /* Set the state back to DOMAIN_NONE. */ + work->dom_state = DOMAIN_NONE; + + if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) { + DEBUG(0,("become_domain_master_fail: Error - cannot find server %s \ in workgroup %s on subnet %s\n", - global_myname(), work->work_group, subrec->subnet_name)); - return; - } + global_myname(), work->work_group, subrec->subnet_name)); + return; + } - /* Update our server status. */ - servrec->serv.type &= ~SV_TYPE_DOMAIN_MASTER; + /* Update our server status. */ + servrec->serv.type &= ~SV_TYPE_DOMAIN_MASTER; - /* Tell the namelist writer to write out a change. */ - subrec->work_changed = True; + /* Tell the namelist writer to write out a change. */ + subrec->work_changed = True; - DEBUG(0,("become_domain_master_fail: Failed to become a domain master browser for \ + DEBUG(0,("become_domain_master_fail: Failed to become a domain master browser for \ workgroup %s on subnet %s. Couldn't register name %s.\n", - work->work_group, subrec->subnet_name, nmb_namestr(fail_name))); + work->work_group, subrec->subnet_name, nmb_namestr(fail_name))); } /**************************************************************************** @@ -79,115 +80,112 @@ static void become_domain_master_stage2(struct subnet_record *subrec, uint16 nb_flags, int ttl, struct in_addr registered_ip) { - struct work_record *work = find_workgroup_on_subnet( subrec, registered_name->name); - struct server_record *servrec; - - if(!work) - { - DEBUG(0,("become_domain_master_stage2: Error - cannot find \ -workgroup %s on subnet %s\n", registered_name->name, subrec->subnet_name)); - return; - } - - if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) - { - DEBUG(0,("become_domain_master_stage2: Error - cannot find server %s \ + nstring regname; + struct work_record *work; + struct server_record *servrec; + + pull_ascii_nstring(regname, registered_name->name); + work = find_workgroup_on_subnet( subrec, regname); + + if(!work) { + DEBUG(0,("become_domain_master_stage2: Error - cannot find \ +workgroup %s on subnet %s\n", regname, subrec->subnet_name)); + return; + } + + if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) { + DEBUG(0,("become_domain_master_stage2: Error - cannot find server %s \ in workgroup %s on subnet %s\n", - global_myname(), registered_name->name, subrec->subnet_name)); - work->dom_state = DOMAIN_NONE; - return; - } - - /* Set the state in the workgroup structure. */ - work->dom_state = DOMAIN_MST; /* Become domain master. */ - - /* Update our server status. */ - servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MASTER); - - /* Tell the namelist writer to write out a change. */ - subrec->work_changed = True; - - if( DEBUGLVL( 0 ) ) - { - dbgtext( "*****\n\nSamba server %s ", global_myname() ); - dbgtext( "is now a domain master browser for " ); - dbgtext( "workgroup %s ", work->work_group ); - dbgtext( "on subnet %s\n\n*****\n", subrec->subnet_name ); - } - - if( subrec == unicast_subnet ) - { - struct nmb_name nmbname; - struct in_addr my_first_ip; - - /* Put our name and first IP address into the - workgroup struct as domain master browser. This - will stop us syncing with ourself if we are also - a local master browser. */ - - make_nmb_name(&nmbname, global_myname(), 0x20); - - work->dmb_name = nmbname; - /* Pick the first interface ip address as the domain master browser ip. */ - my_first_ip = *iface_n_ip(0); - - putip((char *)&work->dmb_addr, &my_first_ip); - - /* We successfully registered by unicast with the - WINS server. We now expect to become the domain - master on the local subnets. If this fails, it's - probably a 1.9.16p2 to 1.9.16p11 server's fault. - - This is a configuration issue that should be addressed - by the network administrator - you shouldn't have - several machines configured as a domain master browser - for the same WINS scope (except if they are 1.9.17 or - greater, and you know what you're doing. - - see docs/DOMAIN.txt. - - */ - become_domain_master_browser_bcast(work->work_group); - } - else - { - /* - * Now we are a domain master on a broadcast subnet, we need to add - * the WORKGROUP<1b> name to the unicast subnet so that we can answer - * unicast requests sent to this name. This bug wasn't found for a while - * as it is strange to have a DMB without using WINS. JRA. - */ - insert_permanent_name_into_unicast(subrec, registered_name, nb_flags); - } + global_myname(), regname, subrec->subnet_name)); + work->dom_state = DOMAIN_NONE; + return; + } + + /* Set the state in the workgroup structure. */ + work->dom_state = DOMAIN_MST; /* Become domain master. */ + + /* Update our server status. */ + servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MASTER); + + /* Tell the namelist writer to write out a change. */ + subrec->work_changed = True; + + if( DEBUGLVL( 0 ) ) { + dbgtext( "*****\n\nSamba server %s ", global_myname() ); + dbgtext( "is now a domain master browser for " ); + dbgtext( "workgroup %s ", work->work_group ); + dbgtext( "on subnet %s\n\n*****\n", subrec->subnet_name ); + } + + if( subrec == unicast_subnet ) { + struct nmb_name nmbname; + struct in_addr my_first_ip; + + /* Put our name and first IP address into the + workgroup struct as domain master browser. This + will stop us syncing with ourself if we are also + a local master browser. */ + + make_nmb_name(&nmbname, global_myname(), 0x20); + + work->dmb_name = nmbname; + /* Pick the first interface ip address as the domain master browser ip. */ + my_first_ip = *iface_n_ip(0); + + putip((char *)&work->dmb_addr, &my_first_ip); + + /* We successfully registered by unicast with the + WINS server. We now expect to become the domain + master on the local subnets. If this fails, it's + probably a 1.9.16p2 to 1.9.16p11 server's fault. + + This is a configuration issue that should be addressed + by the network administrator - you shouldn't have + several machines configured as a domain master browser + for the same WINS scope (except if they are 1.9.17 or + greater, and you know what you're doing. + + see docs/DOMAIN.txt. + + */ + become_domain_master_browser_bcast(work->work_group); + } else { + /* + * Now we are a domain master on a broadcast subnet, we need to add + * the WORKGROUP<1b> name to the unicast subnet so that we can answer + * unicast requests sent to this name. This bug wasn't found for a while + * as it is strange to have a DMB without using WINS. JRA. + */ + insert_permanent_name_into_unicast(subrec, registered_name, nb_flags); + } } /**************************************************************************** Start the name registration process when becoming a Domain Master Browser on a subnet. - ****************************************************************************/ +****************************************************************************/ -static void become_domain_master_stage1(struct subnet_record *subrec, char *wg_name) +static void become_domain_master_stage1(struct subnet_record *subrec, const char *wg_name) { - struct work_record *work; + struct work_record *work; - DEBUG(2,("become_domain_master_stage1: Becoming domain master browser for \ + DEBUG(2,("become_domain_master_stage1: Becoming domain master browser for \ workgroup %s on subnet %s\n", wg_name, subrec->subnet_name)); - /* First, find the workgroup on the subnet. */ - if((work = find_workgroup_on_subnet( subrec, wg_name )) == NULL) - { - DEBUG(0,("become_domain_master_stage1: Error - unable to find workgroup %s on subnet %s.\n", - wg_name, subrec->subnet_name)); - return; - } - - DEBUG(3,("become_domain_master_stage1: go to first stage: register <1b> name\n")); - work->dom_state = DOMAIN_WAIT; - - /* WORKGROUP<1b> is the domain master browser name. */ - register_name(subrec, work->work_group,0x1b,samba_nb_type, - become_domain_master_stage2, - become_domain_master_fail, NULL); + /* First, find the workgroup on the subnet. */ + if((work = find_workgroup_on_subnet( subrec, wg_name )) == NULL) { + DEBUG(0,("become_domain_master_stage1: Error - unable to find workgroup %s on subnet %s.\n", + wg_name, subrec->subnet_name)); + return; + } + + DEBUG(3,("become_domain_master_stage1: go to first stage: register <1b> name\n")); + work->dom_state = DOMAIN_WAIT; + + /* WORKGROUP<1b> is the domain master browser name. */ + register_name(subrec, work->work_group,0x1b,samba_nb_type, + become_domain_master_stage2, + become_domain_master_fail, NULL); } /**************************************************************************** @@ -202,37 +200,35 @@ static void become_domain_master_query_success(struct subnet_record *subrec, struct nmb_name *nmbname, struct in_addr ip, struct res_rec *rrec) { - /* If the given ip is not ours, then we can't become a domain - controler as the name is already registered. - */ - - /* BUG note. Samba 1.9.16p11 servers seem to return the broadcast - address or zero ip for this query. Pretend this is ok. */ - - if(ismyip(ip) || ip_equal(allones_ip, ip) || is_zero_ip(ip)) - { - if( DEBUGLVL( 3 ) ) - { - dbgtext( "become_domain_master_query_success():\n" ); - dbgtext( "Our address (%s) ", inet_ntoa(ip) ); - dbgtext( "returned in query for name %s ", nmb_namestr(nmbname) ); - dbgtext( "(domain master browser name) " ); - dbgtext( "on subnet %s.\n", subrec->subnet_name ); - dbgtext( "Continuing with domain master code.\n" ); - } - - become_domain_master_stage1(subrec, nmbname->name); - } - else - { - if( DEBUGLVL( 0 ) ) - { - dbgtext( "become_domain_master_query_success:\n" ); - dbgtext( "There is already a domain master browser at " ); - dbgtext( "IP %s for workgroup %s ", inet_ntoa(ip), nmbname->name ); - dbgtext( "registered on subnet %s.\n", subrec->subnet_name ); - } - } + nstring name; + pull_ascii_nstring(name, nmbname->name); + + /* If the given ip is not ours, then we can't become a domain + controler as the name is already registered. + */ + + /* BUG note. Samba 1.9.16p11 servers seem to return the broadcast + address or zero ip for this query. Pretend this is ok. */ + + if(ismyip(ip) || ip_equal(allones_ip, ip) || is_zero_ip(ip)) { + if( DEBUGLVL( 3 ) ) { + dbgtext( "become_domain_master_query_success():\n" ); + dbgtext( "Our address (%s) ", inet_ntoa(ip) ); + dbgtext( "returned in query for name %s ", nmb_namestr(nmbname) ); + dbgtext( "(domain master browser name) " ); + dbgtext( "on subnet %s.\n", subrec->subnet_name ); + dbgtext( "Continuing with domain master code.\n" ); + } + + become_domain_master_stage1(subrec, name); + } else { + if( DEBUGLVL( 0 ) ) { + dbgtext( "become_domain_master_query_success:\n" ); + dbgtext( "There is already a domain master browser at " ); + dbgtext( "IP %s for workgroup %s ", inet_ntoa(ip), name ); + dbgtext( "registered on subnet %s.\n", subrec->subnet_name ); + } + } } /**************************************************************************** @@ -245,18 +241,21 @@ static void become_domain_master_query_fail(struct subnet_record *subrec, struct response_record *rrec, struct nmb_name *question_name, int fail_code) { - /* If the query was unicast, and the error is not NAM_ERR (name didn't exist), - then this is a failure. Otherwise, not finding the name is what we want. */ - if((subrec == unicast_subnet) && (fail_code != NAM_ERR)) - { - DEBUG(0,("become_domain_master_query_fail: Error %d returned when \ + nstring name; + + /* If the query was unicast, and the error is not NAM_ERR (name didn't exist), + then this is a failure. Otherwise, not finding the name is what we want. */ + + if((subrec == unicast_subnet) && (fail_code != NAM_ERR)) { + DEBUG(0,("become_domain_master_query_fail: Error %d returned when \ querying WINS server for name %s.\n", - fail_code, nmb_namestr(question_name))); - return; - } + fail_code, nmb_namestr(question_name))); + return; + } - /* Otherwise - not having the name allows us to register it. */ - become_domain_master_stage1(subrec, question_name->name); + /* Otherwise - not having the name allows us to register it. */ + pull_ascii_nstring(name, question_name->name); + become_domain_master_stage1(subrec, name); } /**************************************************************************** @@ -265,47 +264,43 @@ querying WINS server for name %s.\n", static void become_domain_master_browser_bcast(const char *workgroup_name) { - struct subnet_record *subrec; - - for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) - { - struct work_record *work = find_workgroup_on_subnet(subrec, workgroup_name); - - if (work && (work->dom_state == DOMAIN_NONE)) - { - struct nmb_name nmbname; - make_nmb_name(&nmbname,workgroup_name,0x1b); - - /* - * Check for our name on the given broadcast subnet first, only initiate - * further processing if we cannot find it. - */ - - if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL) - { - if( DEBUGLVL( 0 ) ) - { - dbgtext( "become_domain_master_browser_bcast:\n" ); - dbgtext( "Attempting to become domain master browser on " ); - dbgtext( "workgroup %s on subnet %s\n", - workgroup_name, subrec->subnet_name ); - } - - /* Send out a query to establish whether there's a - domain controller on the local subnet. If not, - we can become a domain controller. - */ - - DEBUG(0,("become_domain_master_browser_bcast: querying subnet %s \ + struct subnet_record *subrec; + + for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) { + struct work_record *work = find_workgroup_on_subnet(subrec, workgroup_name); + + if (work && (work->dom_state == DOMAIN_NONE)) { + struct nmb_name nmbname; + make_nmb_name(&nmbname,workgroup_name,0x1b); + + /* + * Check for our name on the given broadcast subnet first, only initiate + * further processing if we cannot find it. + */ + + if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL) { + if( DEBUGLVL( 0 ) ) { + dbgtext( "become_domain_master_browser_bcast:\n" ); + dbgtext( "Attempting to become domain master browser on " ); + dbgtext( "workgroup %s on subnet %s\n", + workgroup_name, subrec->subnet_name ); + } + + /* Send out a query to establish whether there's a + domain controller on the local subnet. If not, + we can become a domain controller. + */ + + DEBUG(0,("become_domain_master_browser_bcast: querying subnet %s \ for domain master browser on workgroup %s\n", subrec->subnet_name, workgroup_name)); - query_name(subrec, nmbname.name, nmbname.name_type, - become_domain_master_query_success, - become_domain_master_query_fail, - NULL); - } - } - } + query_name(subrec, workgroup_name, nmbname.name_type, + become_domain_master_query_success, + become_domain_master_query_fail, + NULL); + } + } + } } /**************************************************************************** @@ -314,46 +309,43 @@ for domain master browser on workgroup %s\n", subrec->subnet_name, workgroup_nam static void become_domain_master_browser_wins(const char *workgroup_name) { - struct work_record *work; + struct work_record *work; - work = find_workgroup_on_subnet(unicast_subnet, workgroup_name); + work = find_workgroup_on_subnet(unicast_subnet, workgroup_name); - if (work && (work->dom_state == DOMAIN_NONE)) - { - struct nmb_name nmbname; + if (work && (work->dom_state == DOMAIN_NONE)) { + struct nmb_name nmbname; - make_nmb_name(&nmbname,workgroup_name,0x1b); + make_nmb_name(&nmbname,workgroup_name,0x1b); - /* - * Check for our name on the unicast subnet first, only initiate - * further processing if we cannot find it. - */ + /* + * Check for our name on the unicast subnet first, only initiate + * further processing if we cannot find it. + */ - if (find_name_on_subnet(unicast_subnet, &nmbname, FIND_SELF_NAME) == NULL) - { - if( DEBUGLVL( 0 ) ) - { - dbgtext( "become_domain_master_browser_wins:\n" ); - dbgtext( "Attempting to become domain master browser " ); - dbgtext( "on workgroup %s, subnet %s.\n", - workgroup_name, unicast_subnet->subnet_name ); - } + if (find_name_on_subnet(unicast_subnet, &nmbname, FIND_SELF_NAME) == NULL) { + if( DEBUGLVL( 0 ) ) { + dbgtext( "become_domain_master_browser_wins:\n" ); + dbgtext( "Attempting to become domain master browser " ); + dbgtext( "on workgroup %s, subnet %s.\n", + workgroup_name, unicast_subnet->subnet_name ); + } - /* Send out a query to establish whether there's a - domain master broswer registered with WINS. If not, - we can become a domain master browser. - */ + /* Send out a query to establish whether there's a + domain master broswer registered with WINS. If not, + we can become a domain master browser. + */ - DEBUG(0,("become_domain_master_browser_wins: querying WINS server from IP %s \ + DEBUG(0,("become_domain_master_browser_wins: querying WINS server from IP %s \ for domain master browser name %s on workgroup %s\n", - inet_ntoa(unicast_subnet->myip), nmb_namestr(&nmbname), workgroup_name)); - - query_name(unicast_subnet, nmbname.name, nmbname.name_type, - become_domain_master_query_success, - become_domain_master_query_fail, - NULL); - } - } + inet_ntoa(unicast_subnet->myip), nmb_namestr(&nmbname), workgroup_name)); + + query_name(unicast_subnet, workgroup_name, nmbname.name_type, + become_domain_master_query_success, + become_domain_master_query_fail, + NULL); + } + } } /**************************************************************************** @@ -363,34 +355,32 @@ for domain master browser name %s on workgroup %s\n", void add_domain_names(time_t t) { - static time_t lastrun = 0; - - if ((lastrun != 0) && (t < lastrun + (CHECK_TIME_ADD_DOM_NAMES * 60))) - return; - - lastrun = t; - - /* Do the "internet group" - <1c> names. */ - if (lp_domain_logons()) - add_logon_names(); - - /* Do the domain master names. */ - if(lp_domain_master()) - { - if(we_are_a_wins_client()) - { - /* We register the WORKGROUP<1b> name with the WINS - server first, and call add_domain_master_bcast() - only if this is successful. - - This results in domain logon services being gracefully provided, - as opposed to the aggressive nature of 1.9.16p2 to 1.9.16p11. - 1.9.16p2 to 1.9.16p11 - due to a bug in namelogon.c, - cannot provide domain master / domain logon services. - */ - become_domain_master_browser_wins(lp_workgroup()); - } - else - become_domain_master_browser_bcast(lp_workgroup()); - } + static time_t lastrun = 0; + + if ((lastrun != 0) && (t < lastrun + (CHECK_TIME_ADD_DOM_NAMES * 60))) + return; + + lastrun = t; + + /* Do the "internet group" - <1c> names. */ + if (lp_domain_logons()) + add_logon_names(); + + /* Do the domain master names. */ + if(lp_domain_master()) { + if(we_are_a_wins_client()) { + /* We register the WORKGROUP<1b> name with the WINS + server first, and call add_domain_master_bcast() + only if this is successful. + + This results in domain logon services being gracefully provided, + as opposed to the aggressive nature of 1.9.16p2 to 1.9.16p11. + 1.9.16p2 to 1.9.16p11 - due to a bug in namelogon.c, + cannot provide domain master / domain logon services. + */ + become_domain_master_browser_wins(lp_workgroup()); + } else { + become_domain_master_browser_bcast(lp_workgroup()); + } + } } |