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-rw-r--r--src/providers/ipa/ipa_common.h1
-rw-r--r--src/providers/ipa/ipa_dyndns.c484
-rw-r--r--src/providers/ipa/ipa_dyndns.h4
-rw-r--r--src/providers/ipa/ipa_init.c6
4 files changed, 470 insertions, 25 deletions
diff --git a/src/providers/ipa/ipa_common.h b/src/providers/ipa/ipa_common.h
index 7fba7330..76336f3d 100644
--- a/src/providers/ipa/ipa_common.h
+++ b/src/providers/ipa/ipa_common.h
@@ -70,6 +70,7 @@ struct ipa_options {
/* id provider */
struct sdap_options *id;
struct sdap_id_ctx *id_ctx;
+ struct resolv_ctx *resolv;
/* auth and chpass provider */
struct dp_option *auth;
diff --git a/src/providers/ipa/ipa_dyndns.c b/src/providers/ipa/ipa_dyndns.c
index 72e4ba4d..6034a5bb 100644
--- a/src/providers/ipa/ipa_dyndns.c
+++ b/src/providers/ipa/ipa_dyndns.c
@@ -41,6 +41,9 @@
#define IPA_DYNDNS_TIMEOUT 15
+#define IPA_DYNDNS_REMOVE_A 0x1
+#define IPA_DYNDNS_REMOVE_AAAA 0x2
+
struct ipa_ipaddress {
struct ipa_ipaddress *next;
struct ipa_ipaddress *prev;
@@ -55,6 +58,8 @@ struct ipa_dyndns_ctx {
char *hostname;
struct ipa_ipaddress *addresses;
bool use_server_with_nsupdate;
+ uint8_t remove_af;
+ enum restrict_family family_order;
};
@@ -62,6 +67,109 @@ static struct tevent_req * ipa_dyndns_update_send(struct ipa_options *ctx);
static void ipa_dyndns_update_done(struct tevent_req *req);
+static errno_t
+ipa_ipaddress_list_as_string_list(TALLOC_CTX *mem_ctx,
+ struct ipa_ipaddress *ipa_addr_list,
+ char ***_straddrs)
+{
+ struct ipa_ipaddress *ipa_addr;
+ size_t count;
+ int ai;
+ char **straddrs;
+ const char *ip;
+ char ip_addr[INET6_ADDRSTRLEN];
+ errno_t ret;
+
+ count = 0;
+ DLIST_FOR_EACH(ipa_addr, ipa_addr_list) {
+ count++;
+ }
+
+ straddrs = talloc_array(mem_ctx, char *, count+1);
+ if (straddrs == NULL) {
+ return ENOMEM;
+ }
+
+ ai = 0;
+ DLIST_FOR_EACH(ipa_addr, ipa_addr_list) {
+ switch(ipa_addr->addr->ss_family) {
+ case AF_INET:
+ errno = 0;
+ ip = inet_ntop(ipa_addr->addr->ss_family,
+ &(((struct sockaddr_in *)ipa_addr->addr)->sin_addr),
+ ip_addr, INET6_ADDRSTRLEN);
+ if (ip == NULL) {
+ ret = errno;
+ goto fail;
+ }
+ break;
+
+ case AF_INET6:
+ errno = 0;
+ ip = inet_ntop(ipa_addr->addr->ss_family,
+ &(((struct sockaddr_in6 *)ipa_addr->addr)->sin6_addr),
+ ip_addr, INET6_ADDRSTRLEN);
+ if (ip == NULL) {
+ ret = errno;
+ goto fail;
+ }
+ break;
+
+ default:
+ DEBUG(0, ("Unknown address family\n"));
+ continue;
+ }
+
+ straddrs[ai] = talloc_strdup(straddrs, ip);
+ if (straddrs[ai] == NULL) {
+ ret = ENOMEM;
+ goto fail;
+ }
+ ai++;
+ }
+
+ straddrs[count] = NULL;
+ *_straddrs = straddrs;
+ return EOK;
+
+fail:
+ talloc_free(straddrs);
+ return ret;
+}
+
+
+errno_t ipa_dyndns_init(TALLOC_CTX *mem_ctx,
+ struct be_ctx *be_ctx,
+ struct ipa_options *ctx)
+{
+ errno_t ret;
+ int resolv_timeout;
+
+ ret = confdb_get_int(be_ctx->cdb, be_ctx, be_ctx->conf_path,
+ CONFDB_DOMAIN_RESOLV_TIMEOUT,
+ RESOLV_DEFAULT_TIMEOUT, &resolv_timeout);
+ if (ret != EOK) {
+ DEBUG(1, ("Could get the timeout parameter from confdb\n"));
+ return ret;
+ }
+
+ ret = resolv_init(be_ctx, be_ctx->ev, resolv_timeout, &ctx->resolv);
+ if (ret != EOK) {
+ DEBUG(1, ("Could not set up resolver context\n"));
+ return ret;
+ }
+
+ ret = be_add_online_cb(be_ctx, be_ctx,
+ ipa_dyndns_update,
+ ctx, NULL);
+ if (ret != EOK) {
+ DEBUG(1, ("Could not set up online callback\n"));
+ return ret;
+ }
+
+ return EOK;
+}
+
void ipa_dyndns_update(void *pvt)
{
struct ipa_options *ctx = talloc_get_type(pvt, struct ipa_options);
@@ -266,11 +374,26 @@ static int ipa_dyndns_add_ldap_iface(struct ipa_dyndns_ctx *state,
return EOK;
}
+static struct tevent_req *
+ipa_dyndns_update_get_addrs_send(TALLOC_CTX *mem_ctx,
+ struct ipa_dyndns_ctx *ctx,
+ enum restrict_family family_order);
+static errno_t
+ipa_dyndns_update_get_addrs_recv(struct tevent_req *req,
+ TALLOC_CTX *mem_ctx,
+ char ***_addrlist);
+
+static errno_t
+ipa_dyndns_gss_tsig_update_setup_check(struct ipa_dyndns_ctx *state);
+static void
+ipa_dyndns_gss_tsig_update_check(struct tevent_req *subreq);
+
static int ipa_dyndns_gss_tsig_update_step(struct tevent_req *req)
{
struct ipa_dyndns_ctx *state = tevent_req_data(req, struct ipa_dyndns_ctx);
char *ipa_hostname;
struct tevent_req *subreq;
+ errno_t ret;
/* Get the IPA hostname */
ipa_hostname = dp_opt_get_string(state->ipa_ctx->basic,
@@ -283,25 +406,332 @@ static int ipa_dyndns_gss_tsig_update_step(struct tevent_req *req)
}
state->hostname = talloc_strdup(state, ipa_hostname);
- if(state->hostname == NULL) {
+ if (state->hostname == NULL) {
return ENOMEM;
}
- /* In the future, it might be best to check that an update
- * needs to be run before running it, but this is such a
- * rare event that it's probably fine to just run an update
- * every time we come online.
- */
- subreq = ipa_dyndns_gss_tsig_update_send(state);
- if(subreq == NULL) {
+ DEBUG(7, ("Checking if the update is needed\n"));
+
+ ret = ipa_dyndns_gss_tsig_update_setup_check(state);
+ if (ret != EOK) {
+ return ret;
+ }
+
+ subreq = ipa_dyndns_update_get_addrs_send(state, state,
+ state->family_order);
+ if (subreq == NULL) {
return ENOMEM;
}
tevent_req_set_callback(subreq,
- ipa_dyndns_gss_tsig_update_done,
+ ipa_dyndns_gss_tsig_update_check,
req);
return EOK;
}
+static errno_t
+ipa_dyndns_gss_tsig_update_setup_check(struct ipa_dyndns_ctx *state)
+{
+ errno_t ret;
+
+ if (dp_opt_get_string(state->ipa_ctx->basic, IPA_DYNDNS_IFACE)) {
+ ret = resolv_get_family_order(state->ipa_ctx->id_ctx->be->cdb,
+ state->ipa_ctx->id_ctx->be->conf_path,
+ &state->family_order);
+ if (ret != EOK) {
+ return ret;
+ }
+
+ /* Unless one family is restricted, just replace all
+ * address families during the update
+ */
+ switch (state->family_order) {
+ case IPV4_ONLY:
+ state->remove_af |= IPA_DYNDNS_REMOVE_A;
+ break;
+ case IPV6_ONLY:
+ state->remove_af |= IPA_DYNDNS_REMOVE_AAAA;
+ break;
+ case IPV4_FIRST:
+ case IPV6_FIRST:
+ state->remove_af |= (IPA_DYNDNS_REMOVE_A |
+ IPA_DYNDNS_REMOVE_AAAA);
+ break;
+ }
+ } else {
+ /* If the interface isn't specified, we ONLY want to have the address
+ * that's connected to the LDAP server stored, so we need to check
+ * (and later remove) both address families.
+ */
+ state->family_order = IPV4_FIRST;
+ state->remove_af = (IPA_DYNDNS_REMOVE_A |
+ IPA_DYNDNS_REMOVE_AAAA);
+ }
+
+ return EOK;
+}
+
+static void
+ipa_dyndns_gss_tsig_update_check(struct tevent_req *subreq)
+{
+ struct tevent_req *req =
+ tevent_req_callback_data(subreq, struct tevent_req);
+ struct ipa_dyndns_ctx *state = tevent_req_data(req,
+ struct ipa_dyndns_ctx);
+
+ errno_t ret;
+ char **str_dnslist = NULL, **str_local_list = NULL;
+ char **dns_only = NULL, **local_only = NULL;
+ bool do_update = false;
+ int i;
+ TALLOC_CTX *tmp_ctx;
+
+ tmp_ctx = talloc_new(NULL);
+ if (!tmp_ctx) {
+ ret = ENOMEM;
+ goto fail;
+ }
+
+ ret = ipa_dyndns_update_get_addrs_recv(subreq, tmp_ctx, &str_dnslist);
+ talloc_zfree(subreq);
+ if (ret != EOK) {
+ DEBUG(3, ("Getting the current list of addresses failed [%d]: %s\n",
+ ret, strerror(ret)));
+ goto fail;
+ }
+
+ ret = ipa_ipaddress_list_as_string_list(tmp_ctx,
+ state->addresses, &str_local_list);
+ if (ret != EOK) {
+ DEBUG(3, ("Converting DNS IP addresses to strings failed: [%d]: %s\n",
+ ret, strerror(ret)));
+ goto fail;
+ }
+
+ /* Compare the lists */
+ ret = diff_string_lists(tmp_ctx, str_dnslist, str_local_list,
+ &dns_only, &local_only, NULL);
+ if (ret != EOK) {
+ DEBUG(3, ("diff_string_lists failed: [%d]: %s\n", ret, strerror(ret)));
+ goto fail;
+ }
+
+ if (dns_only) {
+ for (i=0; dns_only[i]; i++) {
+ DEBUG(7, ("Address in DNS only: %s\n", dns_only[i]));
+ do_update = true;
+ }
+ }
+
+ if (local_only) {
+ for (i=0; local_only[i]; i++) {
+ DEBUG(7, ("Address on localhost only: %s\n", local_only[i]));
+ do_update = true;
+ }
+ }
+
+ if (do_update) {
+ DEBUG(6, ("Detected IP addresses change, will perform an update\n"));
+ subreq = ipa_dyndns_gss_tsig_update_send(state);
+ if(subreq == NULL) {
+ ret = ENOMEM;
+ goto fail;
+ }
+ tevent_req_set_callback(subreq,
+ ipa_dyndns_gss_tsig_update_done,
+ req);
+ talloc_free(tmp_ctx);
+ return;
+ }
+
+ DEBUG(6, ("No DNS update needed, addresses did not change\n"));
+ tevent_req_done(req);
+ talloc_free(tmp_ctx);
+ return;
+
+fail:
+ talloc_free(tmp_ctx);
+ tevent_req_error(req, ret);
+}
+
+struct ipa_dyndns_update_get_addrs_state {
+ struct ipa_dyndns_ctx *dctx;
+
+ enum host_database *db;
+ enum restrict_family family_order;
+
+ char **addrlist;
+ size_t count;
+};
+
+static void ipa_dyndns_update_get_addrs_done(struct tevent_req *subreq);
+static errno_t ipa_dyndns_update_get_addrs_step(struct tevent_req *req);
+
+static struct tevent_req *
+ipa_dyndns_update_get_addrs_send(TALLOC_CTX *mem_ctx,
+ struct ipa_dyndns_ctx *ctx,
+ enum restrict_family family_order)
+{
+ errno_t ret;
+ struct tevent_req *req;
+ struct ipa_dyndns_update_get_addrs_state *state;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct ipa_dyndns_update_get_addrs_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->dctx = ctx;
+ state->family_order = family_order;
+
+ state->db = talloc_array(state, enum host_database, 2);
+ if (state->db == NULL) {
+ ret = ENOMEM;
+ goto immediate;
+ }
+ state->db[0] = DB_DNS;
+ state->db[1] = DB_SENTINEL;
+
+ ret = ipa_dyndns_update_get_addrs_step(req);
+ if (ret != EOK) {
+ goto immediate;
+ }
+
+immediate:
+ if (ret != EOK) {
+ tevent_req_error(req, ret);
+ tevent_req_post(req, ctx->ipa_ctx->id_ctx->be->ev);
+ }
+ return req;
+}
+
+static errno_t
+ipa_dyndns_update_get_addrs_step(struct tevent_req *req)
+{
+ struct tevent_req *subreq;
+ struct ipa_dyndns_update_get_addrs_state *state = tevent_req_data(req,
+ struct ipa_dyndns_update_get_addrs_state);
+
+ subreq = resolv_gethostbyname_send(state,
+ state->dctx->ipa_ctx->id_ctx->be->ev,
+ state->dctx->ipa_ctx->resolv,
+ state->dctx->hostname,
+ state->family_order,
+ state->db);
+ if (!subreq) {
+ return ENOMEM;
+ }
+
+ tevent_req_set_callback(subreq, ipa_dyndns_update_get_addrs_done, req);
+ return EOK;
+}
+
+static void
+ipa_dyndns_update_get_addrs_done(struct tevent_req *subreq)
+{
+ int ret;
+ size_t count;
+ struct tevent_req *req =
+ tevent_req_callback_data(subreq, struct tevent_req);
+ struct ipa_dyndns_update_get_addrs_state *state = tevent_req_data(req,
+ struct ipa_dyndns_update_get_addrs_state);
+ struct resolv_hostent *rhostent;
+ int i;
+
+ ret = resolv_gethostbyname_recv(subreq, state, NULL, NULL,
+ &rhostent);
+ talloc_zfree(subreq);
+
+ /* If the retry did not match, simply quit */
+ if (ret == ENOENT) {
+ /* If the resolver is set to honor both address families
+ * retry the second one
+ */
+ if (((state->family_order == IPV4_FIRST &&
+ rhostent->family == AF_INET) ||
+ (state->family_order == IPV6_FIRST &&
+ rhostent->family == AF_INET6))) {
+
+ state->family_order = (state->family_order == IPV4_FIRST) ? \
+ IPV6_ONLY : IPV4_ONLY;
+
+ ret = ipa_dyndns_update_get_addrs_step(req);
+ if (ret != EOK) {
+ tevent_req_error(req, ret);
+ }
+ return;
+ }
+
+ /* Nothing to retry, simply quit */
+ tevent_req_done(req);
+ return;
+ } else if (ret != EOK) {
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ /* EOK */
+
+ for (count=0; rhostent->addr_list[count]; count++);
+
+ state->addrlist = talloc_realloc(state, state->addrlist, char *,
+ state->count + count + 1);
+ if (!state->addrlist) {
+ tevent_req_error(req, ENOMEM);
+ return;
+ }
+
+ for (i=0; i < count; i++) {
+ state->addrlist[state->count + i] = \
+ resolv_get_string_address_index(state->addrlist,
+ rhostent, i);
+
+ if (state->addrlist[state->count + i] == NULL) {
+ tevent_req_error(req, ENOMEM);
+ return;
+ }
+ }
+ state->count += count;
+ state->addrlist[state->count] = NULL;
+
+ /* If the resolver is set to honor both address families
+ * and the first one matched, retry the second one to
+ * get the complete list.
+ */
+ if (((state->family_order == IPV4_FIRST &&
+ rhostent->family == AF_INET) ||
+ (state->family_order == IPV6_FIRST &&
+ rhostent->family == AF_INET6))) {
+
+ state->family_order = (state->family_order == IPV4_FIRST) ? \
+ IPV6_ONLY : IPV4_ONLY;
+
+ ret = ipa_dyndns_update_get_addrs_step(req);
+ if (ret != EOK) {
+ tevent_req_error(req, ret);
+ }
+ return;
+ }
+
+ /* The second address matched either immediatelly or after a retry.
+ * No need to retry again. */
+ tevent_req_done(req);
+ return;
+}
+
+static errno_t
+ipa_dyndns_update_get_addrs_recv(struct tevent_req *req,
+ TALLOC_CTX *mem_ctx,
+ char ***_addrlist)
+{
+ struct ipa_dyndns_update_get_addrs_state *state = tevent_req_data(req,
+ struct ipa_dyndns_update_get_addrs_state);
+
+ TEVENT_REQ_RETURN_ON_ERROR(req);
+
+ *_addrlist = talloc_steal(mem_ctx, state->addrlist);
+ return EOK;
+}
+
struct ipa_nsupdate_ctx {
char *update_msg;
struct ipa_dyndns_ctx *dyndns_ctx;
@@ -312,6 +742,7 @@ struct ipa_nsupdate_ctx {
static int create_nsupdate_message(struct ipa_nsupdate_ctx *ctx,
+ uint8_t remove_af,
bool use_server_with_nsupdate);
static struct tevent_req *
@@ -335,7 +766,8 @@ ipa_dyndns_gss_tsig_update_send(struct ipa_dyndns_ctx *ctx)
state->child_status = 0;
/* Format the message to pass to the nsupdate command */
- ret = create_nsupdate_message(state, ctx->use_server_with_nsupdate);
+ ret = create_nsupdate_message(state, ctx->remove_af,
+ ctx->use_server_with_nsupdate);
if (ret != EOK) {
goto failed;
}
@@ -360,6 +792,7 @@ struct nsupdate_send_ctx {
};
static int create_nsupdate_message(struct ipa_nsupdate_ctx *ctx,
+ uint8_t remove_af,
bool use_server_with_nsupdate)
{
int ret, i;
@@ -382,7 +815,7 @@ static int create_nsupdate_message(struct ipa_nsupdate_ctx *ctx,
}
/* The DNS zone for IPA is the lower-case
- * version of hte IPA domain
+ * version of the IPA domain
*/
for(i = 0; zone[i] != '\0'; i++) {
zone[i] = tolower(zone[i]);
@@ -418,15 +851,24 @@ static int create_nsupdate_message(struct ipa_nsupdate_ctx *ctx,
goto done;
}
- /* Remove any existing entries */
- ctx->update_msg = talloc_asprintf_append(ctx->update_msg,
- "update delete %s. in A\nsend\n"
- "update delete %s. in AAAA\nsend\n",
- ctx->dyndns_ctx->hostname,
- ctx->dyndns_ctx->hostname);
- if (ctx->update_msg == NULL) {
- ret = ENOMEM;
- goto done;
+ /* Remove existing entries as needed */
+ if (remove_af & IPA_DYNDNS_REMOVE_A) {
+ ctx->update_msg = talloc_asprintf_append(ctx->update_msg,
+ "update delete %s. in A\nsend\n",
+ ctx->dyndns_ctx->hostname);
+ if (ctx->update_msg == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
+ }
+ if (remove_af & IPA_DYNDNS_REMOVE_AAAA) {
+ ctx->update_msg = talloc_asprintf_append(ctx->update_msg,
+ "update delete %s. in AAAA\nsend\n",
+ ctx->dyndns_ctx->hostname);
+ if (ctx->update_msg == NULL) {
+ ret = ENOMEM;
+ goto done;
+ }
}
DLIST_FOR_EACH(new_record, ctx->dyndns_ctx->addresses) {
@@ -746,5 +1188,5 @@ static void ipa_dyndns_update_done(struct tevent_req *req)
return;
}
- DEBUG(1,("Updated DNS entry\n"));
+ DEBUG(1, ("DNS update finished\n"));
}
diff --git a/src/providers/ipa/ipa_dyndns.h b/src/providers/ipa/ipa_dyndns.h
index 406e8b2f..0d8ce7e7 100644
--- a/src/providers/ipa/ipa_dyndns.h
+++ b/src/providers/ipa/ipa_dyndns.h
@@ -25,6 +25,10 @@
#ifndef IPA_DYNDNS_H_
#define IPA_DYNDNS_H_
+errno_t ipa_dyndns_init(TALLOC_CTX *mem_ctx,
+ struct be_ctx *be_ctx,
+ struct ipa_options *ctx);
+
void ipa_dyndns_update(void *pvt);
diff --git a/src/providers/ipa/ipa_init.c b/src/providers/ipa/ipa_init.c
index 8f7d4d61..5d08b8c1 100644
--- a/src/providers/ipa/ipa_init.c
+++ b/src/providers/ipa/ipa_init.c
@@ -149,11 +149,9 @@ int sssm_ipa_id_init(struct be_ctx *bectx,
/* nsupdate is available. Dynamic updates
* are supported
*/
- ret = be_add_online_cb(ctx, ctx->be,
- ipa_dyndns_update,
- ipa_options, NULL);
+ ret = ipa_dyndns_init(ctx, ctx->be, ipa_options);
if (ret != EOK) {
- DEBUG(1,("Failure setting up automatic DNS update\n"));
+ DEBUG(1, ("Failure setting up automatic DNS update\n"));
/* We will continue without DNS updating */
}
}
generated by cgit (git 2.34.1) at 2024-12-04 14:26:54 +0000