diff options
Diffstat (limited to '')
| -rw-r--r-- | libcli/nbt/lmhosts.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/libcli/nbt/lmhosts.c b/libcli/nbt/lmhosts.c new file mode 100644 index 0000000..dd06e70 --- /dev/null +++ b/libcli/nbt/lmhosts.c @@ -0,0 +1,243 @@ +/* + Unix SMB/CIFS implementation. + + manipulate nbt name structures + + Copyright (C) Andrew Tridgell 1994-1998 + Copyright (C) Jeremy Allison 2007 + Copyright (C) Andrew Bartlett 2009. + + 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 <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "lib/util/util_net.h" +#include "system/filesys.h" +#include "system/network.h" +#include "../libcli/nbt/libnbt.h" + +/******************************************************** + Start parsing the lmhosts file. +*********************************************************/ + +FILE *startlmhosts(const char *fname) +{ + FILE *fp = fopen(fname, "r"); + if (!fp) { + DEBUG(4,("startlmhosts: Can't open lmhosts file %s. " + "Error was %s\n", + fname, strerror(errno))); + return NULL; + } + return fp; +} + +/******************************************************** + Parse the next line in the lmhosts file. +*********************************************************/ + +bool getlmhostsent(TALLOC_CTX *ctx, FILE *fp, char **pp_name, int *name_type, + struct sockaddr_storage *pss) +{ + char line[1024]; + + *pp_name = NULL; + + while(!feof(fp) && !ferror(fp)) { + char *ip = NULL; + char *flags = NULL; + char *extra = NULL; + char *name = NULL; + const char *ptr; + char *ptr1 = NULL; + int count = 0; + + *name_type = -1; + + if (!fgets_slash(NULL,line,sizeof(line),fp)) { + continue; + } + + if (*line == '#') { + continue; + } + + ptr = line; + + if (next_token_talloc(ctx, &ptr, &ip, NULL)) + ++count; + if (next_token_talloc(ctx, &ptr, &name, NULL)) + ++count; + if (next_token_talloc(ctx, &ptr, &flags, NULL)) + ++count; + if (next_token_talloc(ctx, &ptr, &extra, NULL)) + ++count; + + if (count <= 0) + continue; + + if (count > 0 && count < 2) { + DEBUG(0,("getlmhostsent: Ill formed hosts line [%s]\n", + line)); + continue; + } + + if (count >= 4) { + DEBUG(0,("getlmhostsent: too many columns " + "in lmhosts file (obsolete syntax)\n")); + continue; + } + + if (!flags) { + flags = talloc_strdup(ctx, ""); + if (!flags) { + continue; + } + } + + DEBUG(4, ("getlmhostsent: lmhost entry: %s %s %s\n", + ip, name, flags)); + + if (strchr_m(flags,'G') || strchr_m(flags,'S')) { + DEBUG(0,("getlmhostsent: group flag " + "in lmhosts ignored (obsolete)\n")); + continue; + } + + if (!interpret_string_addr(pss, ip, AI_NUMERICHOST)) { + DEBUG(0,("getlmhostsent: invalid address " + "%s.\n", ip)); + } + + /* Extra feature. If the name ends in '#XX', + * where XX is a hex number, then only add that name type. */ + if((ptr1 = strchr_m(name, '#')) != NULL) { + char *endptr; + ptr1++; + + *name_type = (int)strtol(ptr1, &endptr, 16); + if(!*ptr1 || (endptr == ptr1)) { + DEBUG(0,("getlmhostsent: invalid name " + "%s containing '#'.\n", name)); + continue; + } + + *(--ptr1) = '\0'; /* Truncate at the '#' */ + } + + *pp_name = talloc_strdup(ctx, name); + if (!*pp_name) { + return false; + } + return true; + } + + return false; +} + +/******************************************************** + Finish parsing the lmhosts file. +*********************************************************/ + +void endlmhosts(FILE *fp) +{ + fclose(fp); +} + +/******************************************************** + Resolve via "lmhosts" method. +*********************************************************/ + +NTSTATUS resolve_lmhosts_file_as_sockaddr(TALLOC_CTX *mem_ctx, + const char *lmhosts_file, + const char *name, + int name_type, + struct sockaddr_storage **return_iplist, + size_t *return_count) +{ + /* + * "lmhosts" means parse the local lmhosts file. + */ + + FILE *fp; + char *lmhost_name = NULL; + int name_type2; + struct sockaddr_storage return_ss; + NTSTATUS status = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND; + TALLOC_CTX *ctx = NULL; + size_t ret_count = 0; + struct sockaddr_storage *iplist = NULL; + + DEBUG(3,("resolve_lmhosts: " + "Attempting lmhosts lookup for name %s<0x%x>\n", + name, name_type)); + + fp = startlmhosts(lmhosts_file); + + if ( fp == NULL ) + return NT_STATUS_NO_SUCH_FILE; + + ctx = talloc_new(mem_ctx); + if (!ctx) { + endlmhosts(fp); + return NT_STATUS_NO_MEMORY; + } + + while (getlmhostsent(ctx, fp, &lmhost_name, &name_type2, &return_ss)) { + + if (!strequal(name, lmhost_name)) { + TALLOC_FREE(lmhost_name); + continue; + } + + if ((name_type2 != -1) && (name_type != name_type2)) { + TALLOC_FREE(lmhost_name); + continue; + } + + /* wrap check. */ + if (ret_count + 1 < ret_count) { + TALLOC_FREE(ctx); + endlmhosts(fp); + return NT_STATUS_INVALID_PARAMETER; + } + iplist = talloc_realloc(ctx, iplist, + struct sockaddr_storage, + ret_count+1); + + if (iplist == NULL) { + TALLOC_FREE(ctx); + endlmhosts(fp); + DEBUG(3,("resolve_lmhosts: talloc_realloc fail !\n")); + return NT_STATUS_NO_MEMORY; + } + + iplist[ret_count] = return_ss; + ret_count += 1; + + /* we found something */ + status = NT_STATUS_OK; + + /* Multiple names only for DC lookup */ + if (name_type != 0x1c) + break; + } + + *return_count = ret_count; + *return_iplist = talloc_move(mem_ctx, &iplist); + TALLOC_FREE(ctx); + endlmhosts(fp); + return status; +} + |