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esp8266/modnetwork: Return empty str for hostname if STA is inactive.

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Instead of crashing due to NULL pointer dereference.  Fixes issue #3341.
This commit is contained in:
Damien George 2018-05-17 22:11:22 +10:00
parent 94a79f340d
commit f8a5cd24d8
1 changed files with 5 additions and 1 deletions
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6
ports/esp8266/modnetwork.c
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@ -443,7 +443,11 @@ STATIC mp_obj_t esp_config(size_t n_args, const mp_obj_t *args, mp_map_t *kwargs
case MP_QSTR_dhcp_hostname: {
req_if = STATION_IF;
char* s = wifi_station_get_hostname();
val = mp_obj_new_str(s, strlen(s));
if (s == NULL) {
val = MP_OBJ_NEW_QSTR(MP_QSTR_);
} else {
val = mp_obj_new_str(s, strlen(s));
}
break;
}
default: