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security/fix: Final review corrections for Ethernet runtime config

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Security fixes:
- IP validation: bounds checking for octets (0-255)
- ETH.config() return value now checked with distinct logging
- set ip 0.0.0.0 now enables DHCP (was rejected before)

Documentation:
- Fixed typo: 'thevalue' → 'the value'
- Added missing: advert.zerohop command documentation
- Clarified IP configuration behavior (DHCP, ETH_STATIC_IP fallback, reset to DHCP)

All identified issues addressed or documented as out-of-scope.
PR #2260 ready for maintainer review.
This commit is contained in:
Piero Andreini 2026-04-06 22:30:52 +02:00
parent ce1b760b29
commit b1d7edc1e7
11 changed files with 55 additions and 46 deletions
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2
examples/simple_room_server/main.cpp
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@ -84,7 +84,7 @@ void setup() {
#ifdef USE_ETHERNET
NodePrefs* prefs = the_mesh.getNodePrefs();
if (prefs->eth_ip != 0) {
board.reconfigureEthernet(prefs->eth_ip, prefs->eth_gateway, prefs->eth_subnet);
board.reconfigureEthernet(prefs->eth_ip, prefs->eth_gateway, prefs->eth_subnet, prefs->eth_dns1);
}
#endif