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add support for ClickHouse native protocol
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| #define CLICKHOUSE_QUERY_ID_SIZE 36 | ||
|
|
||
| #define CLICKHOUSE_QUERY_KIND_INITIAL 1 | ||
| #define CLICKHOUSE_QUERY_KIND_SECONDARY 2 | ||
|
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| #define CLICKHOUSE_CLIENT_CODE_QUERY 1 | ||
|
|
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| #define CLICKHOUSE_SERVER_CODE_DATA 1 | ||
| #define CLICKHOUSE_SERVER_CODE_EXCEPTION 2 | ||
| #define CLICKHOUSE_SERVER_CODE_END_OF_STREAM 5 | ||
|
|
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| static __always_inline | ||
| int is_clickhouse_query(char *buf, __u64 buf_size) { | ||
| __u8 b[CLICKHOUSE_QUERY_ID_SIZE+3]; | ||
| if (bpf_probe_read(&b, sizeof(b), (void *)buf) < 0) { | ||
| return 0; | ||
| } | ||
| if (b[0] != CLICKHOUSE_CLIENT_CODE_QUERY) { | ||
| return 0; | ||
| } | ||
| int offset = 0; | ||
| if (b[1] == 0) { | ||
| offset = 2; | ||
| } else if (b[1] == CLICKHOUSE_QUERY_ID_SIZE) { | ||
| offset = 2 + CLICKHOUSE_QUERY_ID_SIZE; | ||
| } else { | ||
| return 0; | ||
| } | ||
| if (b[offset] != CLICKHOUSE_QUERY_KIND_INITIAL && b[offset] != CLICKHOUSE_QUERY_KIND_SECONDARY) { | ||
| return 0; | ||
| } | ||
| return 1; | ||
| } | ||
|
|
||
| static __always_inline | ||
| int is_clickhouse_response(char *buf, __u32 *status) { | ||
| __u8 code = 0; | ||
| if (bpf_probe_read(&code, sizeof(code), (void *)buf) < 0) { | ||
| return 0; | ||
| } | ||
| if (code == CLICKHOUSE_SERVER_CODE_DATA || code == CLICKHOUSE_SERVER_CODE_END_OF_STREAM) { | ||
| *status = STATUS_OK; | ||
| return 1; | ||
| } | ||
| if (code == CLICKHOUSE_SERVER_CODE_EXCEPTION) { | ||
| *status = STATUS_FAILED; | ||
| return 1; | ||
| } | ||
| return 0; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| package l7 | ||
|
|
||
| import ( | ||
| "bytes" | ||
|
|
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| "github.com/ClickHouse/ch-go/proto" | ||
| ) | ||
|
|
||
| func ParseClickhouse(payload []byte) string { | ||
| r := proto.NewReader(bytes.NewReader(payload)) | ||
| var err error | ||
| if _, err = r.Byte(); err != nil { | ||
| return "" | ||
| } | ||
| if _, err = r.Str(); err != nil { | ||
| return "" | ||
| } | ||
| version := int(proto.FeatureServerQueryTimeInProgress) | ||
| info := proto.ClientInfo{} | ||
| if err = info.DecodeAware(r, version); err != nil { | ||
| return "" | ||
| } | ||
| if info.ProtocolVersion > 0 { | ||
| version = info.ProtocolVersion | ||
| } | ||
| var s proto.Setting | ||
|
|
||
| for { | ||
| if err = s.Decode(r); err != nil { | ||
| return "" | ||
| } | ||
| if s.Key == "" { | ||
| break | ||
| } | ||
| } | ||
| if _, err = r.Str(); err != nil { // inter-server secret | ||
| return "" | ||
| } | ||
| if _, err = r.UVarInt(); err != nil { // stage | ||
| return "" | ||
| } | ||
| if _, err = r.UVarInt(); err != nil { // compression | ||
| return "" | ||
| } | ||
| l, err := r.StrLen() | ||
| if err != nil { | ||
| return "" | ||
| } | ||
| query := make([]byte, min(l, 1024)) | ||
| n, _ := r.Read(query) | ||
| query = bytes.TrimSpace(query[:n]) | ||
| if len(query) == 0 { | ||
| return "" | ||
| } | ||
| if n < l { | ||
| query = append(query[:len(query)-1], []byte("...<TRUNCATED>")...) | ||
| } | ||
| return string(query) | ||
| } |
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