espressif/esp-protocols
1
0
Fork 1
mirror of https://github.com/espressif/esp-protocols.git synced 2025-07-29 18:27:31 +02:00
Code Issues Packages Projects Releases Wiki Activity

fix(mdns): Fix services API races to directly add/remove services

Browse Source 
Original issue (data race when updating hostname): mdns_service_add()
makes a copy of the local hostname and calls using the local copy
mdns_service_add_for_host().
When mdns's hostname is updated the local copy gets out of sync.
**API race issue**: Most of the current API correctly lock the mdns service,
but sometimes unlocks it before sending an action to the action queue,
so it's possible that the situation changes before the actual action
takes place.
**Fix**: After locking the mdns service, we proceed directly with updating
internal structures and do not post actions into the action queue.
**Fix wrtt hostname**: Use mdns_service_add_for_host(hostname=NULL)
for all self hosted services.
MAJOR CHANGE: Fixed mdns API issues when add/remove/update records from multiple threads
This and the following commits fix the API race issues for these mdns APIs:
* mdns_service_add_for_host
* mdns_service_port_set_for_host
* mdns_service_txt_set_for_host
* mdns_service_txt_item_set_for_host_with_explicit_value_len
* mdns_service_txt_item_remove_for_host
* mdns_service_subtype_add_for_host
* mdns_service_instance_name_set_for_host
* mdns_service_remove_for_host
* mdns_service_remove_all
This commit is contained in:
David Cermak
2024-07-22 19:16:42 +02:00
parent 7e5ac87d09
commit 8a690503ed
5 changed files with 97 additions and 185 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
components/mdns/tests/unit_test/main/test_mdns.c
View File

@ -91,6 +91,7 @@ TEST(mdns, api_fails_with_expected_err)
TEST_ASSERT_EQUAL(ESP_OK, mdns_service_txt_item_set(MDNS_SERVICE_NAME, MDNS_SERVICE_PROTO, "key1", "value1") );
TEST_ASSERT_EQUAL(ESP_OK, mdns_service_txt_item_remove(MDNS_SERVICE_NAME, MDNS_SERVICE_PROTO, "key1") );
TEST_ASSERT_EQUAL(ESP_OK, mdns_service_port_set(MDNS_SERVICE_NAME, MDNS_SERVICE_PROTO, 8080) );
yield_to_all_priorities(); // to remove the service with the updated txt records
TEST_ASSERT_EQUAL(ESP_OK, mdns_service_remove(MDNS_SERVICE_NAME, MDNS_SERVICE_PROTO) );
yield_to_all_priorities(); // Make sure that mdns task has executed to remove the service