From 64f0348a3f994334abe64a4d4896109c3c8c9039 Mon Sep 17 00:00:00 2001 From: Jeremy Allison Date: Sat, 13 Dec 1997 14:16:07 +0000 Subject: This is it ! The mega-merge of the JRA_NMBD_REWRITE branch back into the main tree. For the cvs logs of all the files starting nmbd_*.c, look in the JRA_NMBD_REWRITE branch. That branch has now been discontinued. Jeremy. (This used to be commit d80b0cb645f81d16734929a0b27a91c6650499bb) --- source3/nmbd/nmbd_namelistdb.c | 586 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 586 insertions(+) create mode 100644 source3/nmbd/nmbd_namelistdb.c (limited to 'source3/nmbd/nmbd_namelistdb.c') diff --git a/source3/nmbd/nmbd_namelistdb.c b/source3/nmbd/nmbd_namelistdb.c new file mode 100644 index 0000000000..dfd8a80baa --- /dev/null +++ b/source3/nmbd/nmbd_namelistdb.c @@ -0,0 +1,586 @@ +/* + Unix SMB/Netbios implementation. + Version 1.9. + NBT netbios routines and daemon - version 2 + Copyright (C) Andrew Tridgell 1994-1997 + Copyright (C) Luke Kenneth Casson Leighton 1994-1997 + Copyright (C) Jeremy Allison 1994-1997 + + 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" + +extern int DEBUGLEVEL; + +extern pstring scope; +extern char **my_netbios_names; + +uint16 samba_nb_type = 0; /* samba's NetBIOS name type */ + + +/**************************************************************************** + Set Samba's NetBIOS name type. + ****************************************************************************/ + +void set_samba_nb_type(void) +{ + if (lp_wins_support() || (*lp_wins_server())) + samba_nb_type = NB_MFLAG; /* samba is a 'hybrid' node type */ + else + samba_nb_type = NB_BFLAG; /* samba is broadcast-only node type */ +} + +/**************************************************************************** + Returns True if the netbios name is ^1^2__MSBROWSE__^2^1. + + Note: This name is registered if as a master browser or backup browser + you are responsible for a workgroup (when you announce a domain by + broadcasting on your local subnet, you announce it as coming from this + name: see announce_host()). + + **************************************************************************/ + +BOOL ms_browser_name(char *name, int type) +{ + return (strequal(name,MSBROWSE) && (type == 0x01)); +} + +/**************************************************************************** + Add a netbios name into a namelist. + **************************************************************************/ + +static void add_name_to_namelist(struct subnet_record *subrec, + struct name_record *namerec) +{ + struct name_record *namerec2; + + if (!subrec->namelist) + { + subrec->namelist = namerec; + namerec->prev = NULL; + namerec->next = NULL; + return; + } + + for (namerec2 = subrec->namelist; namerec2->next; namerec2 = namerec2->next) + ; + + namerec2->next = namerec; + namerec->next = NULL; + namerec->prev = namerec2; + namerec->subnet = subrec; + + subrec->namelist_changed = True; +} + +/**************************************************************************** + Remove a name from the namelist. + **************************************************************************/ + +void remove_name_from_namelist(struct subnet_record *subrec, + struct name_record *namerec) +{ + if (namerec->next) + namerec->next->prev = namerec->prev; + if (namerec->prev) + namerec->prev->next = namerec->next; + + if(namerec == subrec->namelist) + subrec->namelist = namerec->next; + + if(namerec->ip != NULL) + free((char *)namerec->ip); + free((char *)namerec); + + subrec->namelist_changed = True; +} + + +/**************************************************************************** + Find a name in a subnet. + **************************************************************************/ + +struct name_record *find_name_on_subnet(struct subnet_record *subrec, + struct nmb_name *nmbname, BOOL self_only) +{ + struct name_record *namerec = subrec->namelist; + struct name_record *name_ret; + + for (name_ret = namerec; name_ret; name_ret = name_ret->next) + { + if (nmb_name_equal(&name_ret->name, nmbname)) + { + /* Self names only - these include permanent names. */ + if (self_only && (name_ret->source != SELF_NAME) && + (name_ret->source != PERMANENT_NAME) ) + { + continue; + } + DEBUG(9,("find_name_on_subnet: on subnet %s - found name %s source=%d\n", + subrec->subnet_name, namestr(nmbname), name_ret->source)); + return name_ret; + } + } + DEBUG(9,("find_name_on_subnet: on subnet %s - name %s NOT FOUND\n", + subrec->subnet_name, namestr(nmbname))); + return NULL; +} + +/**************************************************************************** + Find a name over all known broadcast subnets. +**************************************************************************/ + +struct name_record *find_name_for_remote_broadcast_subnet( struct nmb_name *nmbname, + BOOL self_only) +{ + struct subnet_record *subrec; + struct name_record *namerec = NULL; + + for( subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) + { + if((namerec = find_name_on_subnet(subrec, nmbname, self_only))!= NULL) + break; + } + + return namerec; +} + +/**************************************************************************** + Update the ttl of an entry in a subnet name list. + ****************************************************************************/ + +void update_name_ttl(struct name_record *namerec, int ttl) +{ + time_t time_now = time(NULL); + + if(namerec->death_time != PERMANENT_TTL) + namerec->death_time = time_now + ttl; + + namerec->refresh_time = time_now + (ttl/2); + + namerec->subnet->namelist_changed = True; +} + +/**************************************************************************** + Add an entry to a subnet name list. + ****************************************************************************/ + +struct name_record *add_name_to_subnet(struct subnet_record *subrec, + char *name, int type, uint16 nb_flags, int ttl, + enum name_source source, int num_ips, struct in_addr *iplist) +{ + struct name_record *namerec; + time_t time_now = time(NULL); + + if((namerec = (struct name_record *)malloc(sizeof(*namerec))) == NULL) + { + DEBUG(0,("add_name_to_subnet: malloc fail.\n")); + return NULL; + } + + bzero((char *)namerec,sizeof(*namerec)); + + namerec->subnet = subrec; + + namerec->num_ips = num_ips; + namerec->ip = (struct in_addr *)malloc(sizeof(struct in_addr) * namerec->num_ips); + if (!namerec->ip) + { + DEBUG(0,("add_name_to_subnet: malloc fail when creating ip_flgs.\n")); + free((char *)namerec); + return NULL; + } + + bzero((char *)namerec->ip, sizeof(struct in_addr) * namerec->num_ips); + + memcpy(&namerec->ip[0], iplist, num_ips * sizeof(struct in_addr)); + + make_nmb_name(&namerec->name,name,type,scope); + + /* Setup the death_time and refresh_time. */ + if(ttl == PERMANENT_TTL) + namerec->death_time = PERMANENT_TTL; + else + namerec->death_time = time_now + ttl; + + namerec->refresh_time = time_now + (ttl/2); + + /* Enter the name as active. */ + namerec->nb_flags = nb_flags | NB_ACTIVE; + + /* If it's our primary name, flag it as so. */ + if(strequal(my_netbios_names[0],name)) + namerec->nb_flags |= NB_PERM; + + namerec->source = source; + + add_name_to_namelist(subrec,namerec); + + DEBUG(3,("add_name_to_subnet: Added netbios name %s with first IP %s ttl=%d nb_flags=%2x to subnet %s\n", + namestr(&namerec->name),inet_ntoa(*iplist),ttl,(unsigned int)nb_flags, + subrec->subnet_name)); + + subrec->namelist_changed = True; + + return(namerec); +} + +/******************************************************************* + Utility function automatically called when a name refresh or register + succeeds. By definition this is a SELF_NAME (or we wouldn't be registering + it). + ******************************************************************/ + +void standard_success_register(struct subnet_record *subrec, + struct userdata_struct *userdata, + struct nmb_name *nmbname, uint16 nb_flags, int ttl, + struct in_addr registered_ip) +{ + struct name_record *namerec = find_name_on_subnet(subrec, nmbname, FIND_SELF_NAME); + + if(namerec == NULL) + add_name_to_subnet(subrec, nmbname->name, nmbname->name_type, + nb_flags, ttl, SELF_NAME, 1, ®istered_ip); + else + update_name_ttl(namerec, ttl); +} + +/******************************************************************* + Utility function automatically called when a name refresh or register + fails. + ******************************************************************/ + +void standard_fail_register(struct subnet_record *subrec, + struct response_record *rrec, struct nmb_name *nmbname) +{ + struct name_record *namerec = find_name_on_subnet(subrec, nmbname, FIND_SELF_NAME); + + DEBUG(0,("standard_fail_register: Failed to register/refresh name %s on subnet %s\n", + namestr(nmbname), subrec->subnet_name)); + + /* Remove the name from the subnet. */ + if(namerec) + remove_name_from_namelist(subrec, namerec); +} + +/******************************************************************* + Utility function to remove an IP address from a name record. + ******************************************************************/ + +static void remove_nth_ip_in_record( struct name_record *namerec, int ind) +{ + if(ind != namerec->num_ips) + memmove( (char *)(&namerec->ip[ind]), (char *)(&namerec->ip[ind+1]), + ( namerec->num_ips - ind - 1) * sizeof(struct in_addr)); + + namerec->num_ips--; + namerec->subnet->namelist_changed = True; +} + +/******************************************************************* + Utility function to check if an IP address exists in a name record. + ******************************************************************/ + +BOOL find_ip_in_name_record(struct name_record *namerec, struct in_addr ip) +{ + int i; + + for(i = 0; i < namerec->num_ips; i++) + if(ip_equal( namerec->ip[i], ip)) + return True; + + return False; +} + +/******************************************************************* + Utility function to add an IP address to a name record. + ******************************************************************/ + +void add_ip_to_name_record(struct name_record *namerec, struct in_addr new_ip) +{ + struct in_addr *new_list; + + /* Don't add one we already have. */ + if(find_ip_in_name_record( namerec, new_ip)) + return; + + if((new_list = (struct in_addr *)malloc( (namerec->num_ips + 1)*sizeof(struct in_addr)) )== NULL) + { + DEBUG(0,("add_ip_to_name_record: Malloc fail !\n")); + return; + } + + memcpy((char *)new_list, (char *)namerec->ip, namerec->num_ips *sizeof(struct in_addr)); + new_list[namerec->num_ips] = new_ip; + + free((char *)namerec->ip); + namerec->ip = new_list; + namerec->num_ips += 1; + + namerec->subnet->namelist_changed = True; +} + +/******************************************************************* + Utility function to remove an IP address from a name record. + ******************************************************************/ + +void remove_ip_from_name_record( struct name_record *namerec, struct in_addr remove_ip) +{ + /* Try and find the requested ip address - remove it. */ + int i; + int orig_num = namerec->num_ips; + + for(i = 0; i < orig_num; i++) + if( ip_equal( remove_ip, namerec->ip[i]) ) + { + remove_nth_ip_in_record( namerec, i); + break; + } +} + +/******************************************************************* + Utility function that release_name callers can plug into as the + success function when a name release is successful. Used to save + duplication of success_function code. + ******************************************************************/ + +void standard_success_release(struct subnet_record *subrec, + struct userdata_struct *userdata, + struct nmb_name *nmbname, struct in_addr released_ip) +{ + struct name_record *namerec = find_name_on_subnet(subrec, nmbname, FIND_ANY_NAME); + + if(namerec == NULL) + { + DEBUG(0,("standard_success_release: Name release for name %s IP %s on subnet %s. Name \ +was not found on subnet.\n", namestr(nmbname), inet_ntoa(released_ip), subrec->subnet_name)); + return; + } + else + { + int orig_num = namerec->num_ips; + + remove_ip_from_name_record( namerec, released_ip); + + if(namerec->num_ips == orig_num) + DEBUG(0,("standard_success_release: Name release for name %s IP %s on subnet %s. This ip \ +is not known for this name.\n", namestr(nmbname), inet_ntoa(released_ip), subrec->subnet_name )); + } + + if (namerec->num_ips == 0) + remove_name_from_namelist(subrec, namerec); +} + +/******************************************************************* + Expires old names in a subnet namelist. + ******************************************************************/ + +void expire_names_on_subnet(struct subnet_record *subrec, time_t t) +{ + struct name_record *namerec; + struct name_record *next_namerec; + + for (namerec = subrec->namelist; namerec; namerec = next_namerec) + { + next_namerec = namerec->next; + if ((namerec->death_time != PERMANENT_TTL) && (namerec->death_time < t)) + { + if (namerec->source == SELF_NAME) + { + DEBUG(3,("expire_names_on_subnet: Subnet %s not expiring SELF name %s\n", + subrec->subnet_name, namestr(&namerec->name))); + namerec->death_time += 300; + namerec->subnet->namelist_changed = True; + continue; + } + DEBUG(3,("expire_names_on_subnet: Subnet %s - removing expired name %s\n", + subrec->subnet_name, namestr(&namerec->name))); + + remove_name_from_namelist(subrec, namerec); + } + } +} + +/******************************************************************* + Expires old names in all subnet namelists. + ******************************************************************/ + +void expire_names(time_t t) +{ + struct subnet_record *subrec; + + for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) + { + expire_names_on_subnet(subrec, t); + } +} + +/**************************************************************************** + Add the magic samba names, useful for finding samba servers. + These go directly into the name list for a particular subnet, + without going through the normal registration process. + When adding them to the unicast subnet, add them as a list of + all broadcast subnet IP addresses. +**************************************************************************/ + +void add_samba_names_to_subnet(struct subnet_record *subrec) +{ + struct in_addr *iplist = &subrec->myip; + int num_ips = 1; + + /* These names are added permanently (ttl of zero) and will NOT be + refreshed. */ + + if((subrec == unicast_subnet) || (subrec == wins_server_subnet)) + { + struct subnet_record *bcast_subrecs; + int i; + /* Create an IP list containing all our known subnets. */ + + num_ips = iface_count(); + if((iplist = (struct in_addr *)malloc( num_ips * sizeof(struct in_addr) )) == NULL) + { + DEBUG(0,("add_samba_names_to_subnet: Malloc fail !\n")); + return; + } + + for(bcast_subrecs = FIRST_SUBNET, i = 0; bcast_subrecs; + bcast_subrecs = NEXT_SUBNET_EXCLUDING_UNICAST(bcast_subrecs), i++) + iplist[i] = bcast_subrecs->myip; + + } + + add_name_to_subnet(subrec,"*",0x0,samba_nb_type, PERMANENT_TTL, + PERMANENT_NAME, num_ips, iplist); + add_name_to_subnet(subrec,"*",0x20,samba_nb_type,PERMANENT_TTL, + PERMANENT_NAME, num_ips, iplist); + add_name_to_subnet(subrec,"__SAMBA__",0x20,samba_nb_type,PERMANENT_TTL, + PERMANENT_NAME, num_ips, iplist); + add_name_to_subnet(subrec,"__SAMBA__",0x00,samba_nb_type,PERMANENT_TTL, + PERMANENT_NAME, num_ips, iplist); + + if(iplist != &subrec->myip) + free((char *)iplist); +} + +/**************************************************************************** + Dump the contents of the namelists on all the subnets (including unicast) + into a file. Initiated by SIGHUP - used to debug the state of the namelists. +**************************************************************************/ + +static void dump_subnet_namelist( struct subnet_record *subrec, FILE *fp) +{ + struct name_record *namerec; + char *src_type; + struct tm *tm; + int i; + + fprintf(fp, "Subnet %s\n----------------------\n", subrec->subnet_name); + for (namerec = subrec->namelist; namerec; namerec = namerec->next) + { + fprintf(fp,"\tName = %s\t", namestr(&namerec->name)); + switch(namerec->source) + { + case LMHOSTS_NAME: + src_type = "LMHOSTS_NAME"; + break; + case WINS_PROXY_NAME: + src_type = "WINS_PROXY_NAME"; + break; + case REGISTER_NAME: + src_type = "REGISTER_NAME"; + break; + case SELF_NAME: + src_type = "SELF_NAME"; + break; + case DNS_NAME: + src_type = "DNS_NAME"; + break; + case DNSFAIL_NAME: + src_type = "DNSFAIL_NAME"; + break; + case PERMANENT_NAME: + src_type = "PERMANENT_NAME"; + break; + default: + src_type = "unknown!"; + break; + } + fprintf(fp, "Source = %s\nb_flags = %x\t", src_type, namerec->nb_flags); + + if(namerec->death_time != PERMANENT_TTL) + { + tm = LocalTime(&namerec->death_time); + fprintf(fp, "death_time = %s\t", asctime(tm)); + } + else + fprintf(fp, "death_time = PERMANENT\t"); + + if(namerec->refresh_time != PERMANENT_TTL) + { + tm = LocalTime(&namerec->refresh_time); + fprintf(fp, "refresh_time = %s\n", asctime(tm)); + } + else + fprintf(fp, "refresh_time = PERMANENT\n"); + + fprintf(fp, "\t\tnumber of IPS = %d", namerec->num_ips); + for(i = 0; i < namerec->num_ips; i++) + fprintf(fp, "\t%s", inet_ntoa(namerec->ip[i])); + + fprintf(fp, "\n\n"); + } +} + +/**************************************************************************** + Dump the contents of the namelists on all the subnets (including unicast) + into a file. Initiated by SIGHUP - used to debug the state of the namelists. +**************************************************************************/ + +void dump_all_namelists() +{ + fstring fname; + FILE *fp; + struct subnet_record *subrec; + + pstrcpy(fname,lp_lockdir()); + trim_string(fname,NULL,"/"); + strcat(fname,"/"); + strcat(fname,"namelist.debug"); + + fp = fopen(fname,"w"); + + if (!fp) + { + DEBUG(0,("dump_all_namelists: Can't open file %s. Error was %s\n", + fname,strerror(errno))); + return; + } + + for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) + dump_subnet_namelist( subrec, fp); + + if(!we_are_a_wins_client()) + dump_subnet_namelist(unicast_subnet, fp); + + if(remote_broadcast_subnet->namelist != NULL) + dump_subnet_namelist(remote_broadcast_subnet, fp); + + if(wins_server_subnet != NULL) + dump_subnet_namelist( wins_server_subnet, fp); + fclose(fp); +} -- cgit