diff options
Diffstat (limited to 'source4/nmbd/nmbd_synclists.c')
| -rw-r--r-- | source4/nmbd/nmbd_synclists.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/source4/nmbd/nmbd_synclists.c b/source4/nmbd/nmbd_synclists.c new file mode 100644 index 0000000000..b9952fb446 --- /dev/null +++ b/source4/nmbd/nmbd_synclists.c @@ -0,0 +1,300 @@ +/* + 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. + +*/ + +/* this file handles asynchronous browse synchronisation requests. The + requests are done by forking and putting the result in a file in the + locks directory. We do it this way because we don't want nmbd to be + blocked waiting for some server to respond on a TCP connection. This + also allows us to have more than 1 sync going at once (tridge) */ + +#include "includes.h" + +struct sync_record { + struct sync_record *next, *prev; + fstring workgroup; + fstring server; + pstring fname; + struct in_addr ip; + pid_t pid; +}; + +/* a linked list of current sync connections */ +static struct sync_record *syncs; + +static XFILE *fp; + +/******************************************************************* + This is the NetServerEnum callback. + Note sname and comment are in UNIX codepage format. + ******************************************************************/ +static void callback(const char *sname, uint32 stype, + const char *comment, void *state) +{ + x_fprintf(fp,"\"%s\" %08X \"%s\"\n", sname, stype, comment); +} + +/******************************************************************* + Synchronise browse lists with another browse server. + Log in on the remote server's SMB port to their IPC$ service, + do a NetServerEnum and record the results in fname +******************************************************************/ +static void sync_child(char *name, int nm_type, + char *workgroup, + struct in_addr ip, BOOL local, BOOL servers, + char *fname) +{ + extern fstring local_machine; + fstring unix_workgroup; + static struct cli_state cli; + uint32 local_type = local ? SV_TYPE_LOCAL_LIST_ONLY : 0; + struct nmb_name called, calling; + + /* W2K DMB's return empty browse lists on port 445. Use 139. + * Patch from Andy Levine andyl@epicrealm.com. + */ + + if (!cli_initialise(&cli) || !cli_set_port(&cli, 139) || !cli_connect(&cli, name, &ip)) { + return; + } + + make_nmb_name(&calling, local_machine, 0x0); + make_nmb_name(&called , name , nm_type); + + if (!cli_session_request(&cli, &calling, &called)) + { + cli_shutdown(&cli); + return; + } + + if (!cli_negprot(&cli)) { + cli_shutdown(&cli); + return; + } + + if (!cli_session_setup(&cli, "", "", 1, "", 0, workgroup)) { + cli_shutdown(&cli); + return; + } + + if (!cli_send_tconX(&cli, "IPC$", "IPC", "", 1)) { + cli_shutdown(&cli); + return; + } + + /* All the cli_XX functions take UNIX character set. */ + fstrcpy(unix_workgroup, cli.server_domain?cli.server_domain:workgroup); + + /* Fetch a workgroup list. */ + cli_NetServerEnum(&cli, unix_workgroup, + local_type|SV_TYPE_DOMAIN_ENUM, + callback, NULL); + + /* Now fetch a server list. */ + if (servers) { + fstrcpy(unix_workgroup, workgroup); + cli_NetServerEnum(&cli, unix_workgroup, + local?SV_TYPE_LOCAL_LIST_ONLY:SV_TYPE_ALL, + callback, NULL); + } + + cli_shutdown(&cli); +} + + +/******************************************************************* + initialise a browse sync with another browse server. Log in on the + remote server's SMB port to their IPC$ service, do a NetServerEnum + and record the results +******************************************************************/ +void sync_browse_lists(struct work_record *work, + char *name, int nm_type, + struct in_addr ip, BOOL local, BOOL servers) +{ + struct sync_record *s; + static int counter; + + START_PROFILE(sync_browse_lists); + /* Check we're not trying to sync with ourselves. This can + happen if we are a domain *and* a local master browser. */ + if (ismyip(ip)) { +done: + END_PROFILE(sync_browse_lists); + return; + } + + s = (struct sync_record *)malloc(sizeof(*s)); + if (!s) goto done; + + ZERO_STRUCTP(s); + + fstrcpy(s->workgroup, work->work_group); + fstrcpy(s->server, name); + s->ip = ip; + + slprintf(s->fname, sizeof(pstring)-1, + "%s/sync.%d", lp_lockdir(), counter++); + all_string_sub(s->fname,"//", "/", 0); + + DLIST_ADD(syncs, s); + + /* the parent forks and returns, leaving the child to do the + actual sync and call END_PROFILE*/ + CatchChild(); + if ((s->pid = sys_fork())) return; + + BlockSignals( False, SIGTERM ); + + DEBUG(2,("Initiating browse sync for %s to %s(%s)\n", + work->work_group, name, inet_ntoa(ip))); + + fp = x_fopen(s->fname,O_WRONLY|O_CREAT|O_TRUNC, 0644); + if (!fp) { + END_PROFILE(sync_browse_lists); + _exit(1); + } + + sync_child(name, nm_type, work->work_group, ip, local, servers, + s->fname); + + x_fclose(fp); + END_PROFILE(sync_browse_lists); + _exit(0); +} + +/********************************************************************** +handle one line from a completed sync file + **********************************************************************/ +static void complete_one(struct sync_record *s, + char *sname, uint32 stype, char *comment) +{ + struct work_record *work; + struct server_record *servrec; + + stype &= ~SV_TYPE_LOCAL_LIST_ONLY; + + if (stype & SV_TYPE_DOMAIN_ENUM) { + /* See if we can find the workgroup on this subnet. */ + if((work=find_workgroup_on_subnet(unicast_subnet, sname))) { + /* We already know about this workgroup - + update the ttl. */ + update_workgroup_ttl(work,lp_max_ttl()); + } else { + /* Create the workgroup on the subnet. */ + work = create_workgroup_on_subnet(unicast_subnet, + sname, lp_max_ttl()); + if (work) { + /* remember who the master is */ + fstrcpy(work->local_master_browser_name, + comment); + } + } + return; + } + + work = find_workgroup_on_subnet(unicast_subnet, s->workgroup); + if (!work) { + DEBUG(3,("workgroup %s doesn't exist on unicast subnet?\n", + s->workgroup)); + return; + } + + if ((servrec = find_server_in_workgroup( work, sname))) { + /* Check that this is not a locally known + server - if so ignore the entry. */ + if(!(servrec->serv.type & SV_TYPE_LOCAL_LIST_ONLY)) { + /* We already know about this server - update + the ttl. */ + update_server_ttl(servrec, lp_max_ttl()); + /* Update the type. */ + servrec->serv.type = stype; + } + return; + } + + /* Create the server in the workgroup. */ + create_server_on_workgroup(work, sname,stype, lp_max_ttl(), comment); +} + + +/********************************************************************** +read the completed sync info + **********************************************************************/ +static void complete_sync(struct sync_record *s) +{ + XFILE *f; + fstring server, type_str; + unsigned type; + pstring comment; + pstring line; + const char *ptr; + int count=0; + + f = x_fopen(s->fname,O_RDONLY, 0); + + if (!f) return; + + while (!x_feof(f)) { + + if (!fgets_slash(line,sizeof(pstring),f)) continue; + + ptr = line; + + if (!next_token(&ptr,server,NULL,sizeof(server)) || + !next_token(&ptr,type_str,NULL, sizeof(type_str)) || + !next_token(&ptr,comment,NULL, sizeof(comment))) { + continue; + } + + sscanf(type_str, "%X", &type); + + complete_one(s, server, type, comment); + + count++; + } + + x_fclose(f); + + unlink(s->fname); + + DEBUG(2,("sync with %s(%s) for workgroup %s completed (%d records)\n", + s->server, inet_ntoa(s->ip), s->workgroup, count)); +} + +/********************************************************************** +check for completion of any of the child processes + **********************************************************************/ +void sync_check_completion(void) +{ + struct sync_record *s, *next; + + for (s=syncs;s;s=next) { + next = s->next; + if (!process_exists(s->pid)) { + /* it has completed - grab the info */ + complete_sync(s); + DLIST_REMOVE(syncs, s); + ZERO_STRUCTP(s); + SAFE_FREE(s); + } + } +} |