clawbot
aede434f6a
check / check (push) Successful in 6m30s
The request log's `action` values now say what they mean, as sneak named them: `request_header_too_large`, `client_is_rate_limited`, `blocked_by_block_rule` and `client_denied`, with no aliases. `banned` splits into `temporarily_banned` and `permanently_banned`, by whether the ban runs out. When a permanent ban also covers a client, that ban is the one reported. Trips a reader: a request over a rate limit stays `client_is_rate_limited` even when the ban it makes is permanent. Disclosure: the offence key `rule_blocked` is renamed in `clients.json` too, so an existing file holding it stops the start and must be removed. Its `version` stays 1. Model: opus-5-5
44 lines
1.3 KiB
Go
44 lines
1.3 KiB
Go
package discriminator
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// The heuristic dnsbl. It reads SWW_REPUTATION_ACTION, and the DNSBL zones'
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// verdicts through the DNSBL checker.
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import (
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"context"
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"strings"
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"time"
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"sneak.berlin/go/smallwebwaf/internal/config"
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"sneak.berlin/go/smallwebwaf/internal/requestlog"
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)
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// dnsbl notes the DNSBL zones whose verdict lists the client, as noteListed
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// does, adds the tag dnsbl=<zone> for each, the zone's key masked, and refuses
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// the request when SWW_REPUTATION_ACTION is deny. Being
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// limit, it lowers the client's limits instead (see limitPercentages), and
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// being log, it does nothing more. A zone without a verdict on the client is
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// asked about it in the background, and the request does not wait for the
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// answer. Its figure is the zones that list the client, their keys masked.
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type dnsbl struct{}
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func (dnsbl) name() string { return "dnsbl" }
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func (dnsbl) check(ctx context.Context, rq *request, _ time.Time) *verdict {
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listedBy := rq.h.dnsbl.ListedBy(ctx, rq.client)
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rq.dnsblListed = len(listedBy) > 0
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rq.noteListed(listedBy, "listed by a DNSBL zone")
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for _, zone := range listedBy {
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rq.addTag(config.DNSBLTagPrefix + strings.ToLower(zone))
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}
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if !rq.dnsblListed || rq.h.config.ReputationAction != deny {
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return nil
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}
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return &verdict{
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action: requestlog.ActionClientDenied,
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figures: map[string]any{"zones": listedBy},
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}
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}
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