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authorStefan Metzmacher <metze@samba.org>2011-10-04 13:08:50 +0200
committerStefan Metzmacher <metze@samba.org>2011-10-08 01:43:38 +0200
commitf697956dcba801e4209b375f6ebda3168e2a210d (patch)
treee55e8eb3108f12ee05ccdf5a4fad9917481c63a8 /dfs_server
parentde912e783b9ca3a95776fd26073eb43034c0acb0 (diff)
downloadsamba-f697956dcba801e4209b375f6ebda3168e2a210d.tar.gz
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dfs_server: add generic dfs_server_ad_get_referrals() call
This is a generic function to implement the domain, dc and sysvol DFS referrals. metze
Diffstat (limited to 'dfs_server')
-rw-r--r--dfs_server/dfs_server_ad.c847
-rw-r--r--dfs_server/dfs_server_ad.h23
-rw-r--r--dfs_server/wscript_build7
3 files changed, 877 insertions, 0 deletions
diff --git a/dfs_server/dfs_server_ad.c b/dfs_server/dfs_server_ad.c
new file mode 100644
index 00000000000..22d3263b03b
--- /dev/null
+++ b/dfs_server/dfs_server_ad.c
@@ -0,0 +1,847 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Copyright Matthieu Patou <mat@matws.net> 2010-2011
+ Copyright Stefan Metzmacher 2011
+
+ 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 "librpc/gen_ndr/dfsblobs.h"
+#include "librpc/gen_ndr/ndr_dfsblobs.h"
+#include "dsdb/samdb/samdb.h"
+#include "auth/session.h"
+#include "param/param.h"
+#include "lib/tsocket/tsocket.h"
+#include "dfs_server/dfs_server_ad.h"
+
+#define MAX_DFS_RESPONSE 56*1024 /* 56 Kb */
+
+/* A DC set is a group of DC, they might have been grouped together
+ because they belong to the same site, or to site with same cost ...
+*/
+struct dc_set {
+ const char **names;
+ uint32_t count;
+};
+
+/*
+ fill a referral type structure
+ */
+static NTSTATUS fill_normal_dfs_referraltype(TALLOC_CTX *mem_ctx,
+ struct dfs_referral_type *ref,
+ uint16_t version,
+ const char *dfs_path,
+ const char *server_path, int isfirstoffset)
+{
+ ZERO_STRUCTP(ref);
+ switch (version) {
+ case 4:
+ version = 3;
+# if 0
+ /* For the moment there is a bug with XP that don't seems to appriciate much
+ * level4 so we return just level 3 for everyone
+ */
+ ref->referral.v4.server_type = DFS_SERVER_NON_ROOT;
+ /* "normal" referral seems to always include the GUID */
+ ref->referral.v4.size = 34;
+
+ if (isfirstoffset) {
+ ref->referral.v4.entry_flags = DFS_HEADER_FLAG_TARGET_BCK;
+ }
+ ref->referral.v4.ttl = 900; /* As w2k8r2 */
+ ref->referral.v4.referrals.r1.DFS_path = talloc_strdup(mem_ctx, dfs_path);
+ if (ref->referral.v4.referrals.r1.DFS_path == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ ref->referral.v4.referrals.r1.DFS_alt_path = talloc_strdup(mem_ctx, dfs_path);
+ if (ref->referral.v4.referrals.r1.DFS_alt_path == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ ref->referral.v4.referrals.r1.netw_address = talloc_strdup(mem_ctx, server_path);
+ if (ref->referral.v4.referrals.r1.netw_address == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+#endif
+ case 3:
+ ref->version = version;
+ ref->referral.v3.server_type = DFS_SERVER_NON_ROOT;
+ /* "normal" referral seems to always include the GUID */
+ ref->referral.v3.size = 34;
+
+ ref->referral.v3.entry_flags = 0;
+ ref->referral.v3.ttl = 600; /* As w2k3 */
+ ref->referral.v3.referrals.r1.DFS_path = talloc_strdup(mem_ctx, dfs_path);
+ if (ref->referral.v3.referrals.r1.DFS_path == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ ref->referral.v3.referrals.r1.DFS_alt_path = talloc_strdup(mem_ctx, dfs_path);
+ if (ref->referral.v3.referrals.r1.DFS_alt_path == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ ref->referral.v3.referrals.r1.netw_address = talloc_strdup(mem_ctx, server_path);
+ if (ref->referral.v3.referrals.r1.netw_address == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_OK;
+ }
+ return NT_STATUS_INVALID_LEVEL;
+}
+
+/*
+ fill a domain refererral
+ */
+static NTSTATUS fill_domain_dfs_referraltype(TALLOC_CTX *mem_ctx,
+ struct dfs_referral_type *ref,
+ uint16_t version,
+ const char *domain,
+ const char **names,
+ uint16_t numnames)
+{
+ switch (version) {
+ case 3:
+ ZERO_STRUCTP(ref);
+ DEBUG(8, ("Called fill_domain_dfs_referraltype\n"));
+ ref->version = version;
+ ref->referral.v3.server_type = DFS_SERVER_NON_ROOT;
+ /*
+ * It's hard coded ... don't think it's a good way but the
+ * sizeof return not the correct values
+ *
+ * We have 18 if the GUID is not included 34 otherwise
+ */
+ if (numnames == 0) {
+ /* Windows return without the guid when returning domain list
+ */
+ ref->referral.v3.size = 18;
+ } else {
+ ref->referral.v3.size = 34;
+ }
+ ref->referral.v3.entry_flags = DFS_FLAG_REFERRAL_DOMAIN_RESP;
+ ref->referral.v3.ttl = 600; /* As w2k3 */
+ ref->referral.v3.referrals.r2.special_name = talloc_strdup(mem_ctx,
+ domain);
+ if (ref->referral.v3.referrals.r2.special_name == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ ref->referral.v3.referrals.r2.nb_expanded_names = numnames;
+ /* Put the final terminator */
+ if (names) {
+ int i;
+ const char **names2 = talloc_array(mem_ctx, const char *,
+ numnames+1);
+ NT_STATUS_HAVE_NO_MEMORY(names2);
+ for (i = 0; i<numnames; i++) {
+ names2[i] = talloc_asprintf(names2, "\\%s", names[i]);
+ NT_STATUS_HAVE_NO_MEMORY(names2[i]);
+ }
+ names2[numnames] = NULL;
+ ref->referral.v3.referrals.r2.expanded_names = names2;
+ }
+ return NT_STATUS_OK;
+ }
+ return NT_STATUS_INVALID_LEVEL;
+}
+
+/*
+ get the DCs list within a site
+ */
+static NTSTATUS get_dcs_insite(TALLOC_CTX *ctx, struct ldb_context *ldb,
+ struct ldb_dn *sitedn, struct dc_set *list,
+ bool dofqdn)
+{
+ static const char *attrs[] = { "serverReference", NULL };
+ static const char *attrs2[] = { "dNSHostName", "sAMAccountName", NULL };
+ struct ldb_result *r;
+ unsigned int i;
+ int ret;
+ const char **dc_list;
+
+ ret = ldb_search(ldb, ctx, &r, sitedn, LDB_SCOPE_SUBTREE, attrs,
+ "(&(objectClass=server)(serverReference=*))");
+ if (ret != LDB_SUCCESS) {
+ DEBUG(2,(__location__ ": Failed to get list of servers - %s\n",
+ ldb_errstring(ldb)));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ if (r->count == 0) {
+ /* none in this site */
+ talloc_free(r);
+ return NT_STATUS_OK;
+ }
+
+ /*
+ * need to search for all server object to know the size of the array.
+ * Search all the object of class server in this site
+ */
+ dc_list = talloc_array(r, const char *, r->count);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(dc_list, r);
+
+ /* TODO put some random here in the order */
+ list->names = talloc_realloc(list, list->names, const char *, list->count + r->count);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(list->names, r);
+
+ for (i = 0; i<r->count; i++) {
+ struct ldb_dn *dn;
+ struct ldb_result *r2;
+
+ dn = ldb_msg_find_attr_as_dn(ldb, ctx, r->msgs[i], "serverReference");
+ if (!dn) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ ret = ldb_search(ldb, r, &r2, dn, LDB_SCOPE_BASE, attrs2, "(objectClass=computer)");
+ if (ret != LDB_SUCCESS) {
+ DEBUG(2,(__location__ ": Search for computer on %s failed - %s\n",
+ ldb_dn_get_linearized(dn), ldb_errstring(ldb)));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ if (dofqdn) {
+ const char *dns = ldb_msg_find_attr_as_string(r2->msgs[0], "dNSHostName", NULL);
+ if (dns == NULL) {
+ DEBUG(2,(__location__ ": dNSHostName missing on %s\n",
+ ldb_dn_get_linearized(dn)));
+ talloc_free(r);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ list->names[list->count] = talloc_strdup(list->names, dns);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(list->names[list->count], r);
+ } else {
+ char *tmp;
+ const char *acct = ldb_msg_find_attr_as_string(r2->msgs[0], "sAMAccountName", NULL);
+ if (acct == NULL) {
+ DEBUG(2,(__location__ ": sAMAccountName missing on %s\n",
+ ldb_dn_get_linearized(dn)));
+ talloc_free(r);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ tmp = talloc_strdup(list->names, acct);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(tmp, r);
+
+ /* Netbios name is also the sAMAccountName for
+ computer but without the final $ */
+ tmp[strlen(tmp) - 1] = '\0';
+ list->names[list->count] = tmp;
+ }
+ list->count++;
+ talloc_free(r2);
+ }
+
+ talloc_free(r);
+ return NT_STATUS_OK;
+}
+
+
+/*
+ get all DCs
+ */
+static NTSTATUS get_dcs(TALLOC_CTX *ctx, struct ldb_context *ldb,
+ const char *searched_site, bool need_fqdn,
+ struct dc_set ***pset_list, uint32_t flags)
+{
+ /*
+ * Flags will be used later to indicate things like least-expensive
+ * or same-site options
+ */
+ const char *attrs_none[] = { NULL };
+ const char *attrs3[] = { "name", NULL };
+ struct ldb_dn *configdn, *sitedn, *dn, *sitescontainerdn;
+ struct ldb_result *r;
+ struct dc_set **set_list = NULL;
+ uint32_t i;
+ int ret;
+ uint32_t current_pos = 0;
+ NTSTATUS status;
+ TALLOC_CTX *subctx = talloc_new(ctx);
+
+ *pset_list = set_list = NULL;
+
+ subctx = talloc_new(ctx);
+ NT_STATUS_HAVE_NO_MEMORY(subctx);
+
+ configdn = ldb_get_config_basedn(ldb);
+
+ /* Let's search for the Site container */
+ ret = ldb_search(ldb, subctx, &r, configdn, LDB_SCOPE_SUBTREE, attrs_none,
+ "(objectClass=sitesContainer)");
+ if (ret != LDB_SUCCESS) {
+ DEBUG(2,(__location__ ": Failed to find sitesContainer within %s - %s\n",
+ ldb_dn_get_linearized(configdn), ldb_errstring(ldb)));
+ talloc_free(subctx);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ if (r->count > 1) {
+ DEBUG(2,(__location__ ": Expected 1 sitesContainer - found %u within %s\n",
+ r->count, ldb_dn_get_linearized(configdn)));
+ talloc_free(subctx);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ sitescontainerdn = talloc_steal(subctx, r->msgs[0]->dn);
+ talloc_free(r);
+
+ /*
+ * TODO: Here we should have a more subtle handling
+ * for the case "same-site"
+ */
+ ret = ldb_search(ldb, subctx, &r, sitescontainerdn, LDB_SCOPE_SUBTREE,
+ attrs_none, "(objectClass=server)");
+ if (ret != LDB_SUCCESS) {
+ DEBUG(2,(__location__ ": Failed to find servers within %s - %s\n",
+ ldb_dn_get_linearized(sitescontainerdn), ldb_errstring(ldb)));
+ talloc_free(subctx);
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+ talloc_free(r);
+
+ if (searched_site != NULL && searched_site[0] != '\0') {
+ ret = ldb_search(ldb, subctx, &r, configdn, LDB_SCOPE_SUBTREE,
+ attrs_none, "(&(name=%s)(objectClass=site))", searched_site);
+ if (ret != LDB_SUCCESS) {
+ talloc_free(subctx);
+ return NT_STATUS_FOOBAR;
+ } else if (r->count != 1) {
+ talloc_free(subctx);
+ return NT_STATUS_FOOBAR;
+ }
+
+ /* All of this was to get the DN of the searched_site */
+ sitedn = r->msgs[0]->dn;
+
+ set_list = talloc_realloc(subctx, set_list, struct dc_set *, current_pos+1);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(set_list, subctx);
+
+ set_list[current_pos] = talloc(set_list, struct dc_set);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(set_list[current_pos], subctx);
+
+ set_list[current_pos]->names = NULL;
+ set_list[current_pos]->count = 0;
+ status = get_dcs_insite(subctx, ldb, sitedn,
+ set_list[current_pos], need_fqdn);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2,(__location__ ": Failed to get DC from site %s - %s\n",
+ ldb_dn_get_linearized(sitedn), nt_errstr(status)));
+ talloc_free(subctx);
+ return status;
+ }
+ talloc_free(r);
+ current_pos++;
+ }
+
+ /* Let's find all the sites */
+ ret = ldb_search(ldb, subctx, &r, configdn, LDB_SCOPE_SUBTREE, attrs3, "(objectClass=site)");
+ if (ret != LDB_SUCCESS) {
+ DEBUG(2,(__location__ ": Failed to find any site containers in %s\n",
+ ldb_dn_get_linearized(configdn)));
+ talloc_free(subctx);
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ /*
+ * TODO:
+ * We should randomize the order in the main site,
+ * it's mostly needed for sysvol/netlogon referral.
+ * Depending of flag we either randomize order of the
+ * not "in the same site DCs"
+ * or we randomize by group of site that have the same cost
+ * In the long run we want to manipulate an array of site_set
+ * All the site in one set have the same cost (if least-expansive options is selected)
+ * and we will put all the dc related to 1 site set into 1 DCs set.
+ * Within a site set, site order has to be randomized
+ *
+ * But for the moment we just return the list of sites
+ */
+ if (r->count) {
+ /*
+ * We will realloc + 2 because we will need one additional place
+ * for element at current_pos + 1 for the NULL element
+ */
+ set_list = talloc_realloc(subctx, set_list, struct dc_set *,
+ current_pos+2);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(set_list, subctx);
+
+ set_list[current_pos] = talloc(ctx, struct dc_set);
+ NT_STATUS_HAVE_NO_MEMORY_AND_FREE(set_list[current_pos], subctx);
+
+ set_list[current_pos]->names = NULL;
+ set_list[current_pos]->count = 0;
+
+ set_list[current_pos+1] = NULL;
+ }
+
+ for (i=0; i<r->count; i++) {
+ const char *site_name = ldb_msg_find_attr_as_string(r->msgs[i], "name", NULL);
+ if (site_name == NULL) {
+ DEBUG(2,(__location__ ": Failed to find name attribute in %s\n",
+ ldb_dn_get_linearized(r->msgs[i]->dn)));
+ talloc_free(subctx);
+ return NT_STATUS_INTERNAL_DB_CORRUPTION;
+ }
+
+ if (searched_site == NULL ||
+ strcmp(searched_site, site_name) != 0) {
+ DEBUG(2,(__location__ ": Site: %s %s\n",
+ searched_site, site_name));
+
+ /*
+ * Do all the site but the one of the client
+ * (because it has already been done ...)
+ */
+ dn = r->msgs[i]->dn;
+
+ status = get_dcs_insite(subctx, ldb, dn,
+ set_list[current_pos],
+ need_fqdn);
+ if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(subctx);
+ return status;
+ }
+ }
+ }
+ current_pos++;
+ set_list[current_pos] = NULL;
+
+ *pset_list = talloc_move(ctx, &set_list);
+ talloc_free(subctx);
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS dodomain_referral(struct loadparm_context *lp_ctx,
+ struct ldb_context *sam_ctx,
+ const struct tsocket_address *client,
+ struct dfs_GetDFSReferral *r)
+{
+ /*
+ * TODO for the moment we just return the local domain
+ */
+ NTSTATUS status;
+ const char *dns_domain = lpcfg_dnsdomain(lp_ctx);
+ const char *netbios_domain = lpcfg_workgroup(lp_ctx);
+ struct dfs_referral_type *referrals;
+ const char *referral_str;
+ /* In the future this needs to be fetched from the ldb */
+ uint32_t found_domain = 2;
+
+ if (lpcfg_server_role(lp_ctx) != ROLE_DOMAIN_CONTROLLER) {
+ DEBUG(10 ,("Received a domain referral request on a non DC\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (r->in.req.max_referral_level < 3) {
+ DEBUG(2,("invalid max_referral_level %u\n",
+ r->in.req.max_referral_level));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ r->out.resp = talloc_zero(r, struct dfs_referral_resp);
+ if (r->out.resp == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ r->out.resp->path_consumed = 0;
+ r->out.resp->header_flags = 0; /* Do like w2k3 */
+ r->out.resp->nb_referrals = found_domain; /* the fqdn one + the NT domain */
+
+ referrals = talloc_zero_array(r->out.resp,
+ struct dfs_referral_type,
+ r->out.resp->nb_referrals);
+ if (referrals == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ r->out.resp->referral_entries = referrals;
+
+ referral_str = talloc_asprintf(r, "\\%s", netbios_domain);
+ if (referral_str == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = fill_domain_dfs_referraltype(referrals,
+ &referrals[0], 3,
+ referral_str,
+ NULL, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2,("%s: Unable to fill domain referral structure - %s\n",
+ __location__, nt_errstr(status)));
+ return status;
+ }
+
+ referral_str = talloc_asprintf(r, "\\%s", dns_domain);
+ if (referral_str == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = fill_domain_dfs_referraltype(referrals,
+ &referrals[1], 3,
+ referral_str,
+ NULL, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2,("%s: Unable to fill domain referral structure - %s\n",
+ __location__, nt_errstr(status)));
+ return status;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*
+ * Handle the logic for dfs referral request like
+ * \\dns_domain or \\netbios_domain.
+ */
+static NTSTATUS dodc_referral(struct loadparm_context *lp_ctx,
+ struct ldb_context *sam_ctx,
+ const struct tsocket_address *client,
+ struct dfs_GetDFSReferral *r,
+ const char *domain_name)
+{
+ NTSTATUS status;
+ const char *site_name = NULL; /* Name of the site where the client is */
+ bool need_fqdn = false;
+ unsigned int i;
+ const char **dc_list = NULL;
+ uint32_t num_dcs = 0;
+ struct dc_set **set;
+ char *client_str = NULL;
+ struct dfs_referral_type *referrals;
+ const char *referral_str;
+
+ if (lpcfg_server_role(lp_ctx) != ROLE_DOMAIN_CONTROLLER) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (r->in.req.max_referral_level < 3) {
+ DEBUG(2,("invalid max_referral_level %u\n",
+ r->in.req.max_referral_level));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ DEBUG(10, ("in this we have request for %s requested is %s\n",
+ domain_name, r->in.req.servername));
+
+ if (strchr(domain_name,'.')) {
+ need_fqdn = 1;
+ }
+
+ if (tsocket_address_is_inet(client, "ip")) {
+ client_str = tsocket_address_inet_addr_string(client, r);
+ if (client_str == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
+
+ site_name = samdb_client_site_name(sam_ctx, r, client_str, NULL);
+
+ status = get_dcs(r, sam_ctx, site_name, need_fqdn, &set, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(3,("Unable to get list of DCs - %s\n",
+ nt_errstr(status)));
+ return status;
+ }
+
+ for(i=0; set[i]; i++) {
+ uint32_t j;
+
+ dc_list = talloc_realloc(r, dc_list, const char*,
+ num_dcs + set[i]->count + 1);
+ if (dc_list == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ for(j=0; j<set[i]->count; j++) {
+ dc_list[num_dcs + j] = talloc_move(dc_list,
+ &set[i]->names[j]);
+ }
+ num_dcs = num_dcs + set[i]->count;
+ TALLOC_FREE(set[i]);
+ dc_list[num_dcs] = NULL;
+ }
+
+ r->out.resp = talloc_zero(r, struct dfs_referral_resp);
+ if (r->out.resp == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ r->out.resp->path_consumed = 0;
+ r->out.resp->header_flags = 0; /* Do like w2k3 */
+ r->out.resp->nb_referrals = 1;
+
+ referrals = talloc_zero_array(r->out.resp,
+ struct dfs_referral_type,
+ r->out.resp->nb_referrals);
+ if (referrals == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ r->out.resp->referral_entries = referrals;
+
+ if (r->in.req.servername[0] == '\\') {
+ referral_str = talloc_asprintf(referrals, "%s",
+ domain_name);
+ } else {
+ referral_str = talloc_asprintf(referrals, "\\%s",
+ domain_name);
+ }
+ if (referral_str == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = fill_domain_dfs_referraltype(referrals,
+ &referrals[0], 3,
+ referral_str,
+ dc_list, num_dcs);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2,("%s: Unable to fill domain referral structure - %s\n",
+ __location__, nt_errstr(status)));
+ return status;
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*
+ * Handle the logic for dfs referral request like
+ * \\domain\sysvol or \\domain\netlogon
+ */
+static NTSTATUS dosysvol_referral(struct loadparm_context *lp_ctx,
+ struct ldb_context *sam_ctx,
+ const struct tsocket_address *client,
+ struct dfs_GetDFSReferral *r,
+ const char *domain_name,
+ const char *dfs_name)
+{
+ const char *site_name = NULL; /* Name of the site where the client is */
+ bool need_fqdn = false;
+ unsigned int i, c = 0, nb_entries = 0;
+ struct dc_set **set;
+ char *client_str = NULL;
+ NTSTATUS status;
+ struct dfs_referral_type *referrals;
+
+ if (lpcfg_server_role(lp_ctx) != ROLE_DOMAIN_CONTROLLER) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (r->in.req.max_referral_level < 3) {
+ DEBUG(2,("invalid max_referral_level %u\n",
+ r->in.req.max_referral_level));
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ DEBUG(10, ("in this we have request for %s and share %s requested is %s\n",
+ domain_name, dfs_name, r->in.req.servername));
+
+ if (strchr(domain_name,'.')) {
+ need_fqdn = 1;
+ }
+
+ if (tsocket_address_is_inet(client, "ip")) {
+ client_str = tsocket_address_inet_addr_string(client, r);
+ if (client_str == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ }
+
+ site_name = samdb_client_site_name(sam_ctx, r, client_str, NULL);
+
+ status = get_dcs(r, sam_ctx, site_name, need_fqdn, &set, 0);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(3,("Unable to get list of DCs - %s\n",
+ nt_errstr(status)));
+ return status;
+ }
+
+ for(i=0; set[i]; i++) {
+ nb_entries = nb_entries + set[i]->count;
+ }
+
+ r->out.resp = talloc_zero(r, struct dfs_referral_resp);
+ if (r->out.resp == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* The length is expected in bytes */
+ r->out.resp->path_consumed = strlen_m(r->in.req.servername) * 2;
+ /* Do like w2k3 and like in 3.3.5.3 of MS-DFSC*/
+ r->out.resp->header_flags = DFS_HEADER_FLAG_STORAGE_SVR;
+ r->out.resp->nb_referrals = nb_entries;
+
+ referrals = talloc_zero_array(r->out.resp,
+ struct dfs_referral_type,
+ r->out.resp->nb_referrals);
+ if (referrals == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ r->out.resp->referral_entries = referrals;
+
+ c = 0;
+ for(i=0; set[i]; i++) {
+ uint32_t j;
+
+ for(j=0; j< set[i]->count; j++) {
+ struct dfs_referral_type *ref = &referrals[c];
+ const char *referral_str;
+
+ referral_str = talloc_asprintf(referrals, "\\%s\\%s",
+ set[i]->names[j], dfs_name);
+ if (referral_str == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ DEBUG(8,("Doing a dfs referral for %s with this value "
+ "%s requested %s\n",
+ set[i]->names[j], referral_str,
+ r->in.req.servername));
+
+ status = fill_normal_dfs_referraltype(referrals, ref,
+ r->in.req.max_referral_level,
+ r->in.req.servername,
+ referral_str, c==0);
+
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(2,("%s: Unable to fill domain referral "
+ "structure - %s\n",
+ __location__, nt_errstr(status)));
+ return status;
+ }
+
+ c++;
+ }
+ }
+
+ return NT_STATUS_OK;
+}
+
+/*
+ trans2 getdfsreferral implementation
+*/
+NTSTATUS dfs_server_ad_get_referrals(struct loadparm_context *lp_ctx,
+ struct ldb_context *sam_ctx,
+ const struct tsocket_address *client,
+ struct dfs_GetDFSReferral *r)
+{
+ char *server_name = NULL;
+ char *dfs_name = NULL;
+ char *link_path = NULL;
+ const char *netbios_domain;
+ const char *dns_domain;
+ const char *netbios_name;
+ const char *dns_name;
+
+ if (!lpcfg_host_msdfs(lp_ctx)) {
+ return NT_STATUS_FS_DRIVER_REQUIRED;
+ }
+
+ if (r->in.req.servername == NULL) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ DEBUG(8, ("Requested DFS name: %s length: %u\n",
+ r->in.req.servername,
+ (unsigned int)strlen_m(r->in.req.servername)*2));
+
+ /*
+ * If the servername is "" then we are in a case of domain dfs
+ * and the client just searches for the list of local domain
+ * it is attached and also trusted ones.
+ */
+ if (strlen(r->in.req.servername) == 0) {
+ return dodomain_referral(lp_ctx, sam_ctx, client, r);
+ }
+
+ server_name = talloc_strdup(r, r->in.req.servername);
+ if (server_name == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ while(*server_name && *server_name == '\\') {
+ server_name++;
+ }
+
+ dfs_name = strchr(server_name, '\\');
+ if (dfs_name != NULL) {
+ dfs_name[0] = '\0';
+ dfs_name++;
+
+ link_path = strchr(dfs_name, '\\');
+ if (link_path != NULL) {
+ link_path[0] = '\0';
+ link_path++;
+ }
+ }
+
+ if (link_path != NULL) {
+ /*
+ * If it is a DFS Link we do not
+ * handle it here.
+ */
+ return NT_STATUS_NOT_FOUND;
+ }
+
+ netbios_domain = lpcfg_workgroup(lp_ctx);
+ dns_domain = lpcfg_dnsdomain(lp_ctx);
+ netbios_name = lpcfg_netbios_name(lp_ctx);
+ dns_name = talloc_asprintf(r, "%s.%s", netbios_name, dns_domain);
+ if (dns_name == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if ((strcasecmp_m(server_name, netbios_name) == 0) ||
+ (strcasecmp_m(server_name, dns_name) == 0)) {
+ /*
+ * If it is not domain related do not
+ * handle it here.
+ */
+ return NT_STATUS_NOT_FOUND;
+
+ }
+
+ if ((strcasecmp_m(server_name, netbios_domain) != 0) &&
+ (strcasecmp_m(server_name, dns_domain) != 0)) {
+ /*
+ * Not a domain we handle.
+ */
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ /*
+ * Here we have filtered the thing the requested name don't contain our DNS name.
+ * So if the share == NULL or if share in ("sysvol", "netlogon")
+ * then we proceed. In the first case it will be a dc refereal in the second it will
+ * be just a sysvol/netlogon referral.
+ */
+ if (dfs_name == NULL) {
+ return dodc_referral(lp_ctx, sam_ctx,
+ client, r, server_name);
+ }
+
+ /*
+ * Here we have filtered the thing the requested name don't contain our DNS name.
+ * So if the share == NULL or if share in ("sysvol", "netlogon")
+ * then we proceed. In the first case it will be a dc refereal in the second it will
+ * be just a sysvol/netlogon referral.
+ */
+ if (strcasecmp(dfs_name, "sysvol") == 0 ||
+ strcasecmp(dfs_name, "netlogon") == 0) {
+ return dosysvol_referral(lp_ctx, sam_ctx, client, r,
+ server_name, dfs_name);
+ }
+
+ /* By default until all the case are handled */
+ return NT_STATUS_NOT_FOUND;
+}
diff --git a/dfs_server/dfs_server_ad.h b/dfs_server/dfs_server_ad.h
new file mode 100644
index 00000000000..cda923d639c
--- /dev/null
+++ b/dfs_server/dfs_server_ad.h
@@ -0,0 +1,23 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Copyright Stefan Metzmacher 2011
+
+ 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/>.
+*/
+
+NTSTATUS dfs_server_ad_get_referrals(struct loadparm_context *lp_ctx,
+ struct ldb_context *sam_ctx,
+ const struct tsocket_address *client,
+ struct dfs_GetDFSReferral *r);
diff --git a/dfs_server/wscript_build b/dfs_server/wscript_build
new file mode 100644
index 00000000000..294eccf3fe3
--- /dev/null
+++ b/dfs_server/wscript_build
@@ -0,0 +1,7 @@
+#!/usr/bin/env python
+
+bld.SAMBA_LIBRARY('dfs_server_ad',
+ source='dfs_server_ad.c',
+ deps='talloc samdb samba-util LIBTSOCKET',
+ private_library=True
+ )