From 8daa83a594a2e98f39d764422bfbdbc62c9efd44 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 19:20:00 +0200 Subject: Adding upstream version 2:4.20.0+dfsg. Signed-off-by: Daniel Baumann --- source3/nmbd/nmbd_lmhosts.c | 105 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+) create mode 100644 source3/nmbd/nmbd_lmhosts.c (limited to 'source3/nmbd/nmbd_lmhosts.c') diff --git a/source3/nmbd/nmbd_lmhosts.c b/source3/nmbd/nmbd_lmhosts.c new file mode 100644 index 0000000..ecf70bd --- /dev/null +++ b/source3/nmbd/nmbd_lmhosts.c @@ -0,0 +1,105 @@ +/* + Unix SMB/CIFS implementation. + NBT netbios routines and daemon - version 2 + 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 3 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, see . + + Revision History: + + Handle lmhosts file reading. + +*/ + +#include "includes.h" +#include "../libcli/nbt/libnbt.h" +#include "nmbd/nmbd.h" + +/**************************************************************************** +Load a lmhosts file. +****************************************************************************/ + +void load_lmhosts_file(const char *fname) +{ + char *name = NULL; + int name_type; + struct sockaddr_storage ss; + TALLOC_CTX *ctx = talloc_init("load_lmhosts_file"); + FILE *fp = startlmhosts( fname ); + + if (!fp) { + DEBUG(2,("load_lmhosts_file: Can't open lmhosts file %s. Error was %s\n", + fname, strerror(errno))); + TALLOC_FREE(ctx); + return; + } + + while (getlmhostsent(ctx, fp, &name, &name_type, &ss) ) { + struct in_addr ipaddr; + struct subnet_record *subrec = NULL; + enum name_source source = LMHOSTS_NAME; + + if (ss.ss_family != AF_INET) { + TALLOC_FREE(name); + continue; + } + + ipaddr = ((struct sockaddr_in *)&ss)->sin_addr; + + /* We find a relevant subnet to put this entry on, then add it. */ + /* Go through all the broadcast subnets and see if the mask matches. */ + for (subrec = FIRST_SUBNET; subrec ; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) { + if(same_net_v4(ipaddr, subrec->bcast_ip, subrec->mask_ip)) + break; + } + + /* If none match add the name to the remote_broadcast_subnet. */ + if(subrec == NULL) + subrec = remote_broadcast_subnet; + + if(name_type == -1) { + /* Add the (0) and (0x20) names directly into the namelist for this subnet. */ + (void)add_name_to_subnet(subrec,name,0x00,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); + (void)add_name_to_subnet(subrec,name,0x20,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); + } else { + /* Add the given name type to the subnet namelist. */ + (void)add_name_to_subnet(subrec,name,name_type,(uint16_t)NB_ACTIVE,PERMANENT_TTL,source,1,&ipaddr); + } + } + + TALLOC_FREE(ctx); + endlmhosts(fp); +} + +/**************************************************************************** + Find a name read from the lmhosts file. We secretly check the names on + the remote_broadcast_subnet as if the name was added to a regular broadcast + subnet it will be found by normal name query processing. +****************************************************************************/ + +bool find_name_in_lmhosts(struct nmb_name *nmbname, struct name_record **namerecp) +{ + struct name_record *namerec; + + *namerecp = NULL; + + if((namerec = find_name_on_subnet(remote_broadcast_subnet, nmbname, FIND_ANY_NAME))==NULL) + return False; + + if(!NAME_IS_ACTIVE(namerec) || (namerec->data.source != LMHOSTS_NAME)) + return False; + + *namerecp = namerec; + return True; +} -- cgit v1.2.3