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fix(modem): Fix PPP mode detection to accept LCP/conf

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This commit is contained in:
David Cermak
2024-12-06 10:12:25 +01:00
parent 18f196fa1e
commit c989c6adae
1 changed files with 8 additions and 1 deletions
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9
components/esp_modem/src/esp_modem_dce.cpp
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@ -328,12 +328,19 @@ modem_mode DCE_Mode::guess_unsafe(DTE *dte, bool with_cmux)
if (reply_pos >= sizeof(probe::ppp::lcp_echo_reply_head)) {
// check for initial 2 bytes
auto *ptr = static_cast<uint8_t *>(memmem(reply, reply_pos, probe::ppp::lcp_echo_reply_head.data(), 2));
// and check the other two bytes for protocol ID: LCP
// and check the other two bytes for protocol ID:
// * either LCP reply
if (ptr && ptr[3] == probe::ppp::lcp_echo_reply_head[3] && ptr[4] == probe::ppp::lcp_echo_reply_head[4]) {
if (auto signal = weak_signal.lock()) {
signal->set(probe::ppp::mode);
}
}
// * or LCP conf request
if (ptr && ptr[3] == probe::ppp::lcp_echo_request[3] && ptr[4] == probe::ppp::lcp_echo_request[4]) {
if (auto signal = weak_signal.lock()) {
signal->set(probe::ppp::mode);
}
}
}
if (reply_pos >= 4 && memmem(reply, reply_pos, probe::cmd::reply, sizeof(probe::cmd::reply))) {
if (reply[0] != 0xf9) { // double check that the reply is not wrapped in CMUX headers