diff options
| -rw-r--r-- | main/devicestate.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/main/devicestate.c b/main/devicestate.c index 7eb9e3057..2983ee992 100644 --- a/main/devicestate.c +++ b/main/devicestate.c @@ -397,6 +397,7 @@ enum ast_device_state ast_device_state(const char *device) /*! \brief Add device state provider */ int ast_devstate_prov_add(const char *label, ast_devstate_prov_cb_type callback) { + struct devstate_prov *devcb; struct devstate_prov *devprov; if (!callback || !(devprov = ast_calloc(1, sizeof(*devprov)))) @@ -406,6 +407,14 @@ int ast_devstate_prov_add(const char *label, ast_devstate_prov_cb_type callback) ast_copy_string(devprov->label, label, sizeof(devprov->label)); AST_RWLIST_WRLOCK(&devstate_provs); + AST_RWLIST_TRAVERSE(&devstate_provs, devcb, list) { + if (!strcasecmp(devcb->label, label)) { + ast_log(LOG_WARNING, "Device state provider '%s' already registered\n", label); + ast_free(devprov); + AST_RWLIST_UNLOCK(&devstate_provs); + return -1; + } + } AST_RWLIST_INSERT_HEAD(&devstate_provs, devprov, list); AST_RWLIST_UNLOCK(&devstate_provs); |