diff options
Diffstat (limited to 'source4/nmbd/nmbd_nameregister.c')
| -rw-r--r-- | source4/nmbd/nmbd_nameregister.c | 522 |
1 files changed, 0 insertions, 522 deletions
diff --git a/source4/nmbd/nmbd_nameregister.c b/source4/nmbd/nmbd_nameregister.c deleted file mode 100644 index 7bf2584053..0000000000 --- a/source4/nmbd/nmbd_nameregister.c +++ /dev/null @@ -1,522 +0,0 @@ -/* - Unix SMB/CIFS implementation. - 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 - - 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 - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - -*/ - -#include "includes.h" - -/* forward declarations */ -static void wins_next_registration(struct response_record *rrec); - - -/**************************************************************************** - Deal with a response packet when registering one of our names. -****************************************************************************/ - -static void register_name_response(struct subnet_record *subrec, - struct response_record *rrec, struct packet_struct *p) -{ - /* - * If we are registering broadcast, then getting a response is an - * error - we do not have the name. If we are registering unicast, - * then we expect to get a response. - */ - - struct nmb_packet *nmb = &p->packet.nmb; - BOOL bcast = nmb->header.nm_flags.bcast; - BOOL success = True; - struct nmb_name *question_name = &rrec->packet->packet.nmb.question.question_name; - struct nmb_name *answer_name = &nmb->answers->rr_name; - struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb; - int ttl = 0; - uint16 nb_flags = 0; - struct in_addr register_ip; - fstring reg_name; - - putip(®ister_ip,&sent_nmb->additional->rdata[2]); - fstrcpy(reg_name, inet_ntoa(register_ip)); - - if (subrec == unicast_subnet) { - /* we know that this wins server is definately alive - for the moment! */ - wins_srv_alive(rrec->packet->ip, register_ip); - } - - /* Sanity check. Ensure that the answer name in the incoming packet is the - same as the requested name in the outgoing packet. */ - - if(!question_name || !answer_name) { - DEBUG(0,("register_name_response: malformed response (%s is NULL).\n", - question_name ? "question_name" : "answer_name" )); - return; - } - - if(!nmb_name_equal(question_name, answer_name)) { - DEBUG(0,("register_name_response: Answer name %s differs from question name %s.\n", - nmb_namestr(answer_name), nmb_namestr(question_name))); - return; - } - - if(bcast) { - /* - * Special hack to cope with old Samba nmbd's. - * Earlier versions of Samba (up to 1.9.16p11) respond - * to a broadcast name registration of WORKGROUP<1b> when - * they should not. Hence, until these versions are gone, - * we should treat such errors as success for this particular - * case only. jallison@whistle.com. - */ - -#if 1 /* OLD_SAMBA_SERVER_HACK */ - if((nmb->header.rcode == ACT_ERR) && strequal(lp_workgroup(), answer_name->name) && - (answer_name->name_type == 0x1b)) { - /* Pretend we did not get this. */ - rrec->num_msgs--; - - DEBUG(5,("register_name_response: Ignoring broadcast response to registration of name %s due to old Samba server bug.\n", - nmb_namestr(answer_name))); - return; - } -#endif /* OLD_SAMBA_SERVER_HACK */ - - /* Someone else has the name. Log the problem. */ - DEBUG(1,("register_name_response: Failed to register name %s IP %s on subnet %s via broadcast. Error code was %d. Reject came from IP %s\n", - nmb_namestr(answer_name), - reg_name, - subrec->subnet_name, nmb->header.rcode, inet_ntoa(p->ip))); - success = False; - } else { - /* Unicast - check to see if the response allows us to have the name. */ - if (nmb->header.opcode == NMB_WACK_OPCODE) { - /* WINS server is telling us to wait. Pretend we didn't get - the response but don't send out any more register requests. */ - - DEBUG(5,("register_name_response: WACK from WINS server %s in registering name %s IP %s\n", - inet_ntoa(p->ip), nmb_namestr(answer_name), reg_name)); - - rrec->repeat_count = 0; - /* How long we should wait for. */ - rrec->repeat_time = p->timestamp + nmb->answers->ttl; - rrec->num_msgs--; - return; - } else if (nmb->header.rcode != 0) { - /* Error code - we didn't get the name. */ - success = False; - - DEBUG(0,("register_name_response: %sserver at IP %s rejected our name registration of %s IP %s with error code %d.\n", - subrec==unicast_subnet?"WINS ":"", - inet_ntoa(p->ip), - nmb_namestr(answer_name), - reg_name, - nmb->header.rcode)); - } else { - success = True; - /* Get the data we need to pass to the success function. */ - nb_flags = get_nb_flags(nmb->answers->rdata); - ttl = nmb->answers->ttl; - - /* send off a registration for the next IP, if any */ - wins_next_registration(rrec); - } - } - - DEBUG(5,("register_name_response: %s in registering %sname %s IP %s with %s.\n", - success ? "success" : "failure", - subrec==unicast_subnet?"WINS ":"", - nmb_namestr(answer_name), - reg_name, - inet_ntoa(rrec->packet->ip))); - - if(success) { - /* Enter the registered name into the subnet name database before calling - the success function. */ - standard_success_register(subrec, rrec->userdata, answer_name, nb_flags, ttl, register_ip); - if( rrec->success_fn) - (*(register_name_success_function)rrec->success_fn)(subrec, rrec->userdata, answer_name, nb_flags, ttl, register_ip); - } else { - if( rrec->fail_fn) - (*(register_name_fail_function)rrec->fail_fn)(subrec, rrec, question_name); - /* Remove the name. */ - standard_fail_register( subrec, rrec, question_name); - } - - /* Ensure we don't retry. */ - remove_response_record(subrec, rrec); -} - - -/**************************************************************************** - Deal with a timeout of a WINS registration request -****************************************************************************/ -static void wins_registration_timeout(struct subnet_record *subrec, - struct response_record *rrec) -{ - struct userdata_struct *userdata = rrec->userdata; - struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb; - struct nmb_name *nmbname = &sent_nmb->question.question_name; - struct in_addr register_ip; - fstring src_addr; - - putip(®ister_ip,&sent_nmb->additional->rdata[2]); - - fstrcpy(src_addr, inet_ntoa(register_ip)); - - DEBUG(2,("wins_registration_timeout: WINS server %s timed out registering IP %s\n", - inet_ntoa(rrec->packet->ip), src_addr)); - - /* mark it temporarily dead for this source address */ - wins_srv_died(rrec->packet->ip, register_ip); - - /* if we have some userdata then use that to work out what - wins server to try next */ - if (userdata) { - const char *tag = (const char *)userdata->data; - - /* try the next wins server in our failover list for - this tag */ - rrec->packet->ip = wins_srv_ip_tag(tag, register_ip); - } - - /* if we have run out of wins servers for this tag then they - must all have timed out. We treat this as *success*, not - failure, and go into our standard name refresh mode. This - copes with all the wins servers being down */ - if (wins_srv_is_dead(rrec->packet->ip, register_ip)) { - uint16 nb_flags = get_nb_flags(sent_nmb->additional->rdata); - int ttl = sent_nmb->additional->ttl; - - standard_success_register(subrec, userdata, nmbname, nb_flags, ttl, register_ip); - if(rrec->success_fn) { - (*(register_name_success_function)rrec->success_fn)(subrec, - rrec->userdata, - nmbname, - nb_flags, - ttl, - register_ip); - } - - /* send off a registration for the next IP, if any */ - wins_next_registration(rrec); - - /* don't need to send this packet any more */ - remove_response_record(subrec, rrec); - return; - } - - /* we will be moving to the next WINS server for this group, - send it immediately */ - rrec->repeat_count = 2; - rrec->repeat_time = time(NULL) + 1; - rrec->in_expiration_processing = False; - - DEBUG(6,("Retrying register of name %s IP %s with WINS server %s\n", - nmb_namestr(nmbname), src_addr, inet_ntoa(rrec->packet->ip))); - - /* notice that we don't remove the response record. This keeps - us trying to register with each of our failover wins servers */ -} - - -/**************************************************************************** - Deal with a timeout when registering one of our names. -****************************************************************************/ - -static void register_name_timeout_response(struct subnet_record *subrec, - struct response_record *rrec) -{ - /* - * If we are registering unicast, then NOT getting a response is an - * error - we do not have the name. If we are registering broadcast, - * then we don't expect to get a response. - */ - - struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb; - BOOL bcast = sent_nmb->header.nm_flags.bcast; - BOOL success = False; - struct nmb_name *question_name = &sent_nmb->question.question_name; - uint16 nb_flags = 0; - int ttl = 0; - struct in_addr registered_ip; - - if (bcast) { - if(rrec->num_msgs == 0) { - /* Not receiving a message is success for broadcast registration. */ - success = True; - - /* Pull the success values from the original request packet. */ - nb_flags = get_nb_flags(sent_nmb->additional->rdata); - ttl = sent_nmb->additional->ttl; - putip(®istered_ip,&sent_nmb->additional->rdata[2]); - } - } else { - /* wins timeouts are special */ - wins_registration_timeout(subrec, rrec); - return; - } - - DEBUG(5,("register_name_timeout_response: %s in registering name %s on subnet %s.\n", - success ? "success" : "failure", nmb_namestr(question_name), subrec->subnet_name)); - if(success) { - /* Enter the registered name into the subnet name database before calling - the success function. */ - standard_success_register(subrec, rrec->userdata, question_name, nb_flags, ttl, registered_ip); - if( rrec->success_fn) - (*(register_name_success_function)rrec->success_fn)(subrec, rrec->userdata, question_name, nb_flags, ttl, registered_ip); - } else { - if( rrec->fail_fn) - (*(register_name_fail_function)rrec->fail_fn)(subrec, rrec, question_name); - /* Remove the name. */ - standard_fail_register( subrec, rrec, question_name); - } - - /* Ensure we don't retry. */ - remove_response_record(subrec, rrec); -} - - -/**************************************************************************** -initiate one multi-homed name registration packet -****************************************************************************/ -static void multihomed_register_one(struct nmb_name *nmbname, - uint16 nb_flags, - register_name_success_function success_fn, - register_name_fail_function fail_fn, - struct in_addr ip, - const char *tag) -{ - struct userdata_struct *userdata; - struct in_addr wins_ip = wins_srv_ip_tag(tag, ip); - fstring ip_str; - - userdata = (struct userdata_struct *)malloc(sizeof(*userdata) + strlen(tag) + 1); - if (!userdata) { - DEBUG(0,("Failed to allocate userdata structure!\n")); - return; - } - ZERO_STRUCTP(userdata); - userdata->userdata_len = strlen(tag) + 1; - strlcpy(userdata->data, tag, userdata->userdata_len); - - fstrcpy(ip_str, inet_ntoa(ip)); - - DEBUG(6,("Registering name %s IP %s with WINS server %s using tag '%s'\n", - nmb_namestr(nmbname), ip_str, inet_ntoa(wins_ip), tag)); - - if (queue_register_multihomed_name(unicast_subnet, - register_name_response, - register_name_timeout_response, - success_fn, - fail_fn, - userdata, - nmbname, - nb_flags, - ip, - wins_ip) == NULL) { - DEBUG(0,("multihomed_register_one: Failed to send packet trying to register name %s IP %s\n", - nmb_namestr(nmbname), inet_ntoa(ip))); - } - - free(userdata); -} - - -/**************************************************************************** -we have finished the registration of one IP and need to see if we have -any more IPs left to register with this group of wins server for this name -****************************************************************************/ -static void wins_next_registration(struct response_record *rrec) -{ - struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb; - struct nmb_name *nmbname = &sent_nmb->question.question_name; - uint16 nb_flags = get_nb_flags(sent_nmb->additional->rdata); - struct userdata_struct *userdata = rrec->userdata; - const char *tag; - struct in_addr last_ip; - struct subnet_record *subrec; - - putip(&last_ip,&sent_nmb->additional->rdata[2]); - - if (!userdata) { - /* it wasn't multi-homed */ - return; - } - - tag = (const char *)userdata->data; - - for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) { - if (ip_equal(last_ip, subrec->myip)) { - subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec); - break; - } - } - - if (!subrec) { - /* no more to do! */ - return; - } - - switch (sent_nmb->header.opcode) { - case NMB_NAME_MULTIHOMED_REG_OPCODE: - multihomed_register_one(nmbname, nb_flags, NULL, NULL, subrec->myip, tag); - break; - case NMB_NAME_REFRESH_OPCODE_8: - queue_wins_refresh(nmbname, - register_name_response, - register_name_timeout_response, - nb_flags, subrec->myip, tag); - break; - } -} - -/**************************************************************************** - Try and register one of our names on the unicast subnet - multihomed. -****************************************************************************/ -static void multihomed_register_name(struct nmb_name *nmbname, uint16 nb_flags, - register_name_success_function success_fn, - register_name_fail_function fail_fn) -{ - /* - If we are adding a group name, we just send multiple - register name packets to the WINS server (this is an - internet group name. - - If we are adding a unique name, We need first to add - our names to the unicast subnet namelist. This is - because when a WINS server receives a multihomed - registration request, the first thing it does is to - send a name query to the registering machine, to see - if it has put the name in it's local namelist. - We need the name there so the query response code in - nmbd_incomingrequests.c will find it. - - We are adding this name prematurely (we don't really - have it yet), but as this is on the unicast subnet - only we will get away with this (only the WINS server - will ever query names from us on this subnet). - */ - int num_ips=0; - int i, t; - struct subnet_record *subrec; - char **wins_tags; - struct in_addr *ip_list; - - for(subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec) ) - num_ips++; - - if((ip_list = (struct in_addr *)malloc(num_ips * sizeof(struct in_addr)))==NULL) { - DEBUG(0,("multihomed_register_name: malloc fail !\n")); - return; - } - - for (subrec = FIRST_SUBNET, i = 0; - subrec; - subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec), i++ ) { - ip_list[i] = subrec->myip; - } - - add_name_to_subnet(unicast_subnet, nmbname->name, nmbname->name_type, - nb_flags, lp_max_ttl(), SELF_NAME, - num_ips, ip_list); - - /* get the list of wins tags - we try to register for each of them */ - wins_tags = wins_srv_tags(); - - /* Now try and register the name for each wins tag. Note that - at this point we only register our first IP with each wins - group. We will register the rest from - wins_next_registration() when we get the reply for this - one. That follows the way W2K does things (tridge) - */ - for (t=0; wins_tags && wins_tags[t]; t++) { - multihomed_register_one(nmbname, nb_flags, - success_fn, fail_fn, - ip_list[0], - wins_tags[t]); - } - - wins_srv_tags_free(wins_tags); - - SAFE_FREE(ip_list); -} - - -/**************************************************************************** - Try and register one of our names. -****************************************************************************/ -void register_name(struct subnet_record *subrec, - const char *name, int type, uint16 nb_flags, - register_name_success_function success_fn, - register_name_fail_function fail_fn, - struct userdata_struct *userdata) -{ - struct nmb_name nmbname; - - make_nmb_name(&nmbname, name, type); - - /* Always set the NB_ACTIVE flag on the name we are - registering. Doesn't make sense without it. - */ - - nb_flags |= NB_ACTIVE; - - if (subrec == unicast_subnet) { - /* we now always do multi-homed registration if we are - registering to a WINS server. This copes much - better with complex WINS setups */ - multihomed_register_name(&nmbname, nb_flags, - success_fn, fail_fn); - return; - } - - if (queue_register_name(subrec, - register_name_response, - register_name_timeout_response, - success_fn, - fail_fn, - userdata, - &nmbname, - nb_flags) == NULL) { - DEBUG(0,("register_name: Failed to send packet trying to register name %s\n", - nmb_namestr(&nmbname))); - } -} - - -/**************************************************************************** - Try and refresh one of our names. This is *only* called for WINS refresh -****************************************************************************/ -void wins_refresh_name(struct name_record *namerec) -{ - int t; - char **wins_tags; - - /* get the list of wins tags - we try to refresh for each of them */ - wins_tags = wins_srv_tags(); - - for (t=0; wins_tags && wins_tags[t]; t++) { - queue_wins_refresh(&namerec->name, - register_name_response, - register_name_timeout_response, - namerec->data.nb_flags, - namerec->data.ip[0], wins_tags[t]); - } - - wins_srv_tags_free(wins_tags); -} |