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fix: ipv6 solicited-node multicast: take last 24 bits #37

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Merged
lissy93 merged 2 commits into from
Nov 18, 2025
Merged

fix: ipv6 solicited-node multicast: take last 24 bits #37

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ipv6 solicited-node multicase: take last 24 bits
PSandro Nov 17, 2025
ca01272
Merge branch 'main' into main
lissy93 Nov 17, 2025
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4 changes: 2 additions & 2 deletions src/lib/components/tools/IPv6SolicitedNode.svelte
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Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,7 @@
const lastGroup = groups[7]; // e.g., "5678"

// Take last digit of second-last group and all digits of last group
const last24Bits = secondLastGroup.slice(-1) + lastGroup; // "45678"
const last24Bits = secondLastGroup.slice(-2) + lastGroup; // "45678"

// Solicited-node multicast prefix is ff02::1:ff00:0/104
const solicitedNodePrefix = 'ff02:0000:0000:0000:0000:0001:ff';
Expand Down Expand Up @@ -149,7 +149,7 @@
const normalizedUnicast = expandIPv6(trimmed);
const solicitedNodeAddress = calculateSolicitedNodeMulticast(trimmed);
const groups = normalizedUnicast.split(':');
const last24Bits = groups[6].slice(-1) + groups[7];
const last24Bits = groups[6].slice(-2) + groups[7];

const explanation = [
`1. Take the last 24 bits of the unicast address: ${groups[6]}:${groups[7]} → ${last24Bits}`,
Expand Down
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