Show figures of the routing table on the home page (closes #154)

The home page gets cards for the newest and oldest kept route, the newest and oldest updated AS, the AS with the most prefixes, the ASes with a single prefix and fifteen well-known networks. Two more cards count the bogon announcements and the prefixes with several origin ASes. They link to the new pages /bogons and /multiple-origins, which list up to 1,000 entries each. The new package internal/bogon tells reserved prefixes and AS numbers, from the IANA special-purpose and address space registries. Table.Overview walks the table and lets the read lock go every 10,000 prefixes. The server works the cards out once a minute and serves that copy. A new index on asns(last_seen) finds the newest and oldest updated AS. Model: opus-5-5
2026-10-27 18:27:01 +01:00
parent e68be8254a
commit 281d162e27
23 changed files with 2240 additions and 6 deletions
@@ -0,0 +1,95 @@
+package bogon_test
+
+import (
+	"net/netip"
+	"strconv"
+	"testing"
+
+	"git.eeqj.de/sneak/routewatch/internal/bogon"
+)
+
+func TestPrefix(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		prefix string
+		// want is why the prefix is reserved, or "" when it is not.
+		want string
+	}{
+		{"10.1.2.0/24", "Private-Use (10.0.0.0/8)"},
+		{"10.0.0.0/8", "Private-Use (10.0.0.0/8)"},
+		{"192.0.2.0/24", "Documentation (TEST-NET-1) (192.0.2.0/24)"},
+		{"2001:db8:1::/48", "Documentation (2001:db8::/32)"},
+		{"fd00::/8", "Unique-Local (fc00::/7)"},
+		// Multicast space, from the IANA address space registries.
+		{"224.0.0.0/4", "Multicast (224.0.0.0/4)"},
+		{"239.255.0.0/16", "Multicast (224.0.0.0/4)"},
+		{"ff00::/8", "Multicast (ff00::/8)"},
+		{"ff02::/16", "Multicast (ff00::/8)"},
+		// The most specific block names the reason.
+		{"0.0.0.0/32", "This host on this network (0.0.0.0/32)"},
+		{"2001:2::/48", "Benchmarking (2001:2::/48)"},
+		// Blocks that may be announced, inside reserved blocks.
+		{"192.0.0.9/32", ""},
+		{"2001:4:112::/48", ""},
+		// Blocks that may be announced, inside no reserved block.
+		{"192.175.48.0/24", ""},
+		{"2002::/16", ""},
+		// A prefix that holds a reserved block is not inside it.
+		{"192.0.0.0/16", ""},
+		{"0.0.0.0/0", ""},
+		// Prefixes anyone may announce.
+		{"8.8.8.0/24", ""},
+		{"2001:4860::/32", ""},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.prefix, func(t *testing.T) {
+			t.Parallel()
+
+			reason, reserved := bogon.Prefix(netip.MustParsePrefix(tc.prefix))
+			if reason != tc.want || reserved != (tc.want != "") {
+				t.Errorf("Prefix(%s) = %q, %v; want %q", tc.prefix, reason,
+					reserved, tc.want)
+			}
+		})
+	}
+}
+
+func TestASN(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		asn int
+		// want is why the AS number is reserved, or "" when it is not.
+		want string
+	}{
+		{23456, "AS_TRANS (AS23456)"},
+		{64496, "Documentation (AS64496-AS64511)"},
+		{64512, "Private-Use (AS64512-AS65534)"},
+		{65534, "Private-Use (AS64512-AS65534)"},
+		{65535, "Last 16-bit AS number (AS65535)"},
+		{65551, "Documentation (AS65536-AS65551)"},
+		{4200000000, "Private-Use (AS4200000000-AS4294967294)"},
+		{4294967295, "Last 32-bit AS number (AS4294967295)"},
+		// AS 0 means no known origin, and the AS112 project uses AS 112.
+		{0, ""},
+		{112, ""},
+		// Not handed out yet, which is not counted.
+		{65552, ""},
+		{15169, ""},
+		{64495, ""},
+	}
+
+	for _, tc := range tests {
+		t.Run(strconv.Itoa(tc.asn), func(t *testing.T) {
+			t.Parallel()
+
+			reason, reserved := bogon.ASN(tc.asn)
+			if reason != tc.want || reserved != (tc.want != "") {
+				t.Errorf("ASN(%d) = %q, %v; want %q", tc.asn, reason, reserved,
+					tc.want)
+			}
+		})
+	}
+}