Fixed various (minor) socket issues.#623
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GideonZ merged 1 commit intoGideonZ:masterfrom Feb 8, 2026
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- Several (corner) cases where 0 was incorrectly not treated as a valid socket descriptor. - Fixed handling of CFG_MODEM_LISTEN_PORT in modem.cc: when sscanf failed (user configured an empty or non-numeric string value), an undefined value was used as the port number. - Entering an empty string, 0, or any non-numeric value for CFG_MODEM_LISTEN_PORT now no longer starts the listener thread (as port 0 is invalid anyway).
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I checked firmware sources using sockets, and found some more places where 0 was not properly handled as a valid socket descriptor. Nothing "dramatic" (as with the MicroHttpServer), but easy to fix.
Also, an undefined value was used for the port number in modem.cc, when an empty or non-numeric string was entered for CFG_MODEM_LISTEN_PORT, so when sscanf failed.
Entering an empty string, 0, or any non-numeric value for CFG_MODEM_LISTEN_PORT now no longer starts the modem's listener thread (as port 0 is invalid anyway).