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S1 #7 steps 1-2: IPv4 checks, the IP setting per Saved Network, DNS and NTP settings

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The plan and decisions Q105 to Q116 (docs/milestones/S1.md). lib/net:
strict IPv4 parsing, prefix and mask, and the checks a Fixed setting must
pass, each refusal with its reason. A Saved Network is Automatic or Fixed
(address/prefix and an optional gateway), kept with it in flash. Settings:
two DNS servers (9.9.9.9, 1.1.1.1), "Always use my DNS", two NTP servers
(pool.ntp.org, time.cloudflare.com). Host-tested: 383 tests.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
This commit is contained in:
twisla
2026-10-05 23:39:07 +02:00
co-authored by Claude Opus 5.5
parent 7e8882d9cb
commit bdd027cb50
10 changed files with 429 additions and 1 deletions
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lib/services/src/settings.cpp
+12
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@@ -1,5 +1,7 @@
#include "settings.h"
#include "ipv4.h"
namespace roro {
namespace {
@@ -32,6 +34,11 @@ const Definition kDefinitions[] = {
{"gnss_on", Kind::Bool, 1, nullptr, 0, 1},
{"coord_dms", Kind::Bool, 0, nullptr, 0, 1},
{"lora_preset", Kind::Int, 0, nullptr, 0, 6}, // LongFast first
{"dns1", Kind::String, 0, "9.9.9.9", 7, 15}, // Quad9
{"dns2", Kind::String, 0, "1.1.1.1", 0, 15}, // Cloudflare
{"dns_always", Kind::Bool, 0, nullptr, 0, 1},
{"ntp1", Kind::String, 0, "pool.ntp.org", 1, 63},
{"ntp2", Kind::String, 0, "time.cloudflare.com", 0, 63},
};
static_assert(sizeof(kDefinitions) / sizeof(kDefinitions[0]) == static_cast<size_t>(Setting::Count),
"every Setting needs a definition");
@@ -84,6 +91,11 @@ bool Settings::validString(Setting s, const std::string& value) const {
if (value == region) return true;
return false;
}
uint32_t address;
if (s == Setting::Dns1) return net::parseIpv4(value, address);
if (s == Setting::Dns2) return value.empty() || net::parseIpv4(value, address);
if (s == Setting::Ntp1) return net::validHost(value);
if (s == Setting::Ntp2) return value.empty() || net::validHost(value);
return true;
}