zephyr/modusocket: getaddrinfo: Raise OSError on resolution timeout, etc.

zephyr/modusocket.c

@@ -533,12 +533,18 @@ typedef struct _getaddrinfo_state_t {
     mp_obj_t result;
     struct k_sem sem;
     mp_obj_t port;
+    int status;
 } getaddrinfo_state_t;
 
 void dns_resolve_cb(enum dns_resolve_status status, struct dns_addrinfo *info, void *user_data) {
     getaddrinfo_state_t *state = user_data;
+    DEBUG_printf("dns status: %d\n", status);
 
     if (info == NULL) {
+        if (status == DNS_EAI_ALLDONE) {
+            status = 0;
+        }
+        state->status = status;
         k_sem_give(&state->sem);
         return;
     }
@@ -569,7 +575,6 @@ STATIC mp_obj_t mod_getaddrinfo(size_t n_args, const mp_obj_t *args) {
     state.result = mp_obj_new_list(0, NULL);
     k_sem_init(&state.sem, 0, UINT_MAX);
 
-    int status;
     for (int i = 2; i--;) {
         int type = (family != AF_INET6 ? DNS_QUERY_TYPE_A : DNS_QUERY_TYPE_AAAA);
         RAISE_ERRNO(dns_get_addr_info(host, type, NULL, dns_resolve_cb, &state, 3000));
@@ -580,6 +585,12 @@ STATIC mp_obj_t mod_getaddrinfo(size_t n_args, const mp_obj_t *args) {
         family = AF_INET6;
     }
 
+    // Raise error only if there's nothing to return, otherwise
+    // it may be IPv4 vs IPv6 differences.
+    if (state.status != 0 && mp_obj_len(state.result) == 0) {
+        mp_raise_OSError(state.status);
+    }
+
     return state.result;
 }
 STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_getaddrinfo_obj, 2, 3, mod_getaddrinfo);