[client] Add detailed routes and resolved IPs to debug bundle (#4141)

client/internal/debug/format_linux.go

@@ -0,0 +1,185 @@
+//go:build linux && !android
+
+package debug
+
+import (
+	"fmt"
+	"net/netip"
+	"sort"
+
+	"github.com/netbirdio/netbird/client/anonymize"
+	"github.com/netbirdio/netbird/client/internal/routemanager/systemops"
+)
+
+func formatIPRulesTable(ipRules []systemops.IPRule, anonymize bool, anonymizer *anonymize.Anonymizer) string {
+	if len(ipRules) == 0 {
+		return "No IP rules found.\n"
+	}
+
+	sort.Slice(ipRules, func(i, j int) bool {
+		return ipRules[i].Priority < ipRules[j].Priority
+	})
+
+	columnConfig := detectIPRuleColumns(ipRules)
+
+	headers := buildIPRuleHeaders(columnConfig)
+
+	rows := buildIPRuleRows(ipRules, columnConfig, anonymize, anonymizer)
+
+	return formatTable("IP Rules:", headers, rows)
+}
+
+type ipRuleColumnConfig struct {
+	hasInvert, hasTo, hasMark, hasIIF, hasOIF, hasSuppressPlen bool
+}
+
+func detectIPRuleColumns(ipRules []systemops.IPRule) ipRuleColumnConfig {
+	var config ipRuleColumnConfig
+	for _, rule := range ipRules {
+		if rule.Invert {
+			config.hasInvert = true
+		}
+		if rule.To.IsValid() {
+			config.hasTo = true
+		}
+		if rule.Mark != 0 {
+			config.hasMark = true
+		}
+		if rule.IIF != "" {
+			config.hasIIF = true
+		}
+		if rule.OIF != "" {
+			config.hasOIF = true
+		}
+		if rule.SuppressPlen >= 0 {
+			config.hasSuppressPlen = true
+		}
+	}
+	return config
+}
+
+func buildIPRuleHeaders(config ipRuleColumnConfig) []string {
+	var headers []string
+
+	headers = append(headers, "Priority")
+	if config.hasInvert {
+		headers = append(headers, "Not")
+	}
+	headers = append(headers, "From")
+	if config.hasTo {
+		headers = append(headers, "To")
+	}
+	if config.hasMark {
+		headers = append(headers, "FWMark")
+	}
+	if config.hasIIF {
+		headers = append(headers, "IIF")
+	}
+	if config.hasOIF {
+		headers = append(headers, "OIF")
+	}
+	headers = append(headers, "Table")
+	headers = append(headers, "Action")
+	if config.hasSuppressPlen {
+		headers = append(headers, "SuppressPlen")
+	}
+
+	return headers
+}
+
+func buildIPRuleRows(ipRules []systemops.IPRule, config ipRuleColumnConfig, anonymize bool, anonymizer *anonymize.Anonymizer) [][]string {
+	var rows [][]string
+	for _, rule := range ipRules {
+		row := buildSingleIPRuleRow(rule, config, anonymize, anonymizer)
+		rows = append(rows, row)
+	}
+	return rows
+}
+
+func buildSingleIPRuleRow(rule systemops.IPRule, config ipRuleColumnConfig, anonymize bool, anonymizer *anonymize.Anonymizer) []string {
+	var row []string
+
+	row = append(row, fmt.Sprintf("%d", rule.Priority))
+
+	if config.hasInvert {
+		row = append(row, formatIPRuleInvert(rule.Invert))
+	}
+
+	row = append(row, formatIPRuleAddress(rule.From, "all", anonymize, anonymizer))
+
+	if config.hasTo {
+		row = append(row, formatIPRuleAddress(rule.To, "-", anonymize, anonymizer))
+	}
+
+	if config.hasMark {
+		row = append(row, formatIPRuleMark(rule.Mark, rule.Mask))
+	}
+
+	if config.hasIIF {
+		row = append(row, formatIPRuleInterface(rule.IIF))
+	}
+
+	if config.hasOIF {
+		row = append(row, formatIPRuleInterface(rule.OIF))
+	}
+
+	row = append(row, rule.Table)
+
+	row = append(row, formatIPRuleAction(rule.Action))
+
+	if config.hasSuppressPlen {
+		row = append(row, formatIPRuleSuppressPlen(rule.SuppressPlen))
+	}
+
+	return row
+}
+
+func formatIPRuleInvert(invert bool) string {
+	if invert {
+		return "not"
+	}
+	return "-"
+}
+
+func formatIPRuleAction(action string) string {
+	if action == "unspec" {
+		return "lookup"
+	}
+	return action
+}
+
+func formatIPRuleSuppressPlen(suppressPlen int) string {
+	if suppressPlen >= 0 {
+		return fmt.Sprintf("%d", suppressPlen)
+	}
+	return "-"
+}
+
+func formatIPRuleAddress(prefix netip.Prefix, defaultVal string, anonymize bool, anonymizer *anonymize.Anonymizer) string {
+	if !prefix.IsValid() {
+		return defaultVal
+	}
+
+	if anonymize {
+		anonymizedIP := anonymizer.AnonymizeIP(prefix.Addr())
+		return fmt.Sprintf("%s/%d", anonymizedIP, prefix.Bits())
+	}
+	return prefix.String()
+}
+
+func formatIPRuleMark(mark, mask uint32) string {
+	if mark == 0 {
+		return "-"
+	}
+	if mask != 0 {
+		return fmt.Sprintf("0x%x/0x%x", mark, mask)
+	}
+	return fmt.Sprintf("0x%x", mark)
+}
+
+func formatIPRuleInterface(iface string) string {
+	if iface == "" {
+		return "-"
+	}
+	return iface
+}