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[ESP8266] adds an error check for data overflow from modem side

pull/9366/head
Veijo Pesonen 2019-01-14 12:14:58 +02:00
parent 28d5477e50
commit 02cd9f1884
1 changed files with 4 additions and 0 deletions
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4
components/wifi/esp8266-driver/ESP8266/ESP8266.cpp
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@ -715,6 +715,10 @@ int32_t ESP8266::_recv_tcp_passive(int id, void *data, uint32_t amount, uint32_t
// update internal variable tcp_data_avbl to reflect the remaining data
if (_sock_i[id].tcp_data_rcvd > 0) {
if (_sock_i[id].tcp_data_rcvd > (int32_t)amount) {
MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER, MBED_ERROR_CODE_EBADMSG), \
"ESP8266::_recv_tcp_passive() too much data from modem\n");
}
if (_sock_i[id].tcp_data_avbl > _sock_i[id].tcp_data_rcvd) {
_sock_i[id].tcp_data_avbl -= _sock_i[id].tcp_data_rcvd;
} else {