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231703cc7f
This notification bases on `LOG_BROKEN` and `LOG_UNUSUAL` level log.
--Introduction
A notification for topic `warning` is sent every time a new `BROKEN`/
`UNUSUAL` level(in plugins, we use `error`/`warn`) log generated, which
means an unusual/borken thing happens, such as channel failed,
message resolving failed...
```json
{
"warning": {
"level": "warn",
"time": "1559743608.565342521",
"source": "lightningd(17652): 0821f80652fb840239df8dc99205792bba2e559a05469915804c08420230e23c7c chan #7854:",
"log": "Peer permanent failure in CHANNELD_NORMAL: lightning_channeld: sent ERROR bad reestablish dataloss msg"
}
}
```
1. `level` is `warn` or `error`:
`warn` means something seems bad happened and it's under control, but
we'd better check it;
`error` means something extremely bad is out of control, and it may lead
to crash;
2. `time` is the second since epoch;
3. `source`, in fact, is the `prefix` of the log_entry. It means where
the event happened, it may have the following forms:
`<node_id> chan #<db_id_of_channel>:`, `lightningd(<lightningd_pid>):`,
`plugin-<plugin_name>:`, `<daemon_name>(<daemon_pid>):`, `jsonrpc:`,
`jcon fd <error_fd_to_jsonrpc>:`, `plugin-manager`;
4. `log` is the context of the original log entry.
--Note:
1. The main code uses `UNUSUAL`/`BROKEN`, and plugin module uses `warn`
/`error`, considering the consistency with plugin, warning choose `warn`
/`error`. But users who use c-lightning with plugins may want to
`getlog` with specified level when receive warning. It's the duty for
plugin dev to turn `warn`/`error` into `UNUSUAL`/`BROKEN` and present it
to the users, or pass it directly to `getlog`;
2. About time, `json_log()` in `log` module uses the Relative Time, from
the time when `log_book` inited to the time when this event happend.
But I consider the `UNUSUAL`/`BROKEN` event is rare, and it is very
likely to happen after running for a long time, so for users, they will
pay more attention to Absolute Time.
-- Related Change
1. Remove the definitions of `log`, `log_book`, `log_entry` from `log.c`
to `log.h`, then they can be used in warning declaration and definition.
2. Remove `void json_add_time(struct json_stream *result, const char
*fieldname, struct timespec ts)` from `log.c` to `json.c`, and add
related declaration in `json.h`. Now the notification function in
`notification.c` can call it.
2. Add a pointer to `struct lightningd` in `struct log_book`. This may
affect the independence of the `log` module, but storing a pointer to
`ld` is more direct;
212 lines
7.3 KiB
C
212 lines
7.3 KiB
C
/* lightningd/json.h
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* Helpers for outputting JSON results that are specific only for
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* lightningd.
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*/
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#ifndef LIGHTNING_LIGHTNINGD_JSON_H
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#define LIGHTNING_LIGHTNINGD_JSON_H
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#include "config.h"
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#include <ccan/short_types/short_types.h>
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#include <ccan/tal/tal.h>
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#include <ccan/time/time.h>
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#include <common/amount.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#define JSMN_STRICT 1
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# include <external/jsmn/jsmn.h>
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struct bitcoin_tx;
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struct bitcoin_txid;
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struct chainparams;
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struct channel_id;
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struct command;
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struct json_escaped;
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struct json_stream;
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struct pubkey;
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struct node_id;
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struct route_hop;
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struct sha256;
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struct short_channel_id;
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struct wallet_payment;
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struct wallet_tx;
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struct wireaddr;
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struct wireaddr_internal;
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/* Output a route array. */
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void json_add_route(struct json_stream *r, char const *n,
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const struct route_hop *hops, size_t hops_len);
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/* '"fieldname" : "0289abcdef..."' or "0289abcdef..." if fieldname is NULL */
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void json_add_pubkey(struct json_stream *response,
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const char *fieldname,
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const struct pubkey *key);
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/* '"fieldname" : "0289abcdef..."' or "0289abcdef..." if fieldname is NULL */
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void json_add_node_id(struct json_stream *response,
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const char *fieldname,
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const struct node_id *id);
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/* '"fieldname" : <hexrev>' or "<hexrev>" if fieldname is NULL */
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void json_add_txid(struct json_stream *result, const char *fieldname,
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const struct bitcoin_txid *txid);
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struct command_result *param_pubkey(struct command *cmd, const char *name,
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const char *buffer, const jsmntok_t *tok,
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struct pubkey **pubkey);
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struct command_result *param_txid(struct command *cmd, const char *name,
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const char *buffer, const jsmntok_t *tok,
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struct bitcoin_txid **txid);
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/* Makes sure *id is valid. */
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struct command_result *param_node_id(struct command *cmd,
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const char *name,
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const char *buffer,
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const jsmntok_t *tok,
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struct node_id **id);
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struct command_result *param_short_channel_id(struct command *cmd,
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const char *name,
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const char *buffer,
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const jsmntok_t *tok,
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struct short_channel_id **scid);
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enum feerate_style {
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FEERATE_PER_KSIPA,
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FEERATE_PER_KBYTE
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};
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/* Extract a feerate style. */
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struct command_result *param_feerate_style(struct command *cmd,
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const char *name,
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const char *buffer,
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const jsmntok_t *tok,
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enum feerate_style **style);
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const char *json_feerate_style_name(enum feerate_style style);
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/* Extract a feerate with optional style suffix. */
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struct command_result *param_feerate(struct command *cmd, const char *name,
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const char *buffer, const jsmntok_t *tok,
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u32 **feerate);
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/* '"fieldname" : "1234:5:6"' */
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void json_add_short_channel_id(struct json_stream *response,
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const char *fieldname,
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const struct short_channel_id *id);
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bool json_tok_channel_id(const char *buffer, const jsmntok_t *tok,
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struct channel_id *cid);
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/* JSON serialize a network address for a node */
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void json_add_address(struct json_stream *response, const char *fieldname,
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const struct wireaddr *addr);
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/* JSON serialize a network address for a node. */
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void json_add_address_internal(struct json_stream *response,
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const char *fieldname,
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const struct wireaddr_internal *addr);
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/* '"fieldname" : "value"' or '"value"' if fieldname is NULL. Turns
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* any non-printable chars into JSON escapes, but leaves existing escapes alone.
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*/
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void json_add_string(struct json_stream *result, const char *fieldname, const char *value);
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/* '"fieldname" : "value"' or '"value"' if fieldname is NULL. String must
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* already be JSON escaped as necessary. */
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void json_add_escaped_string(struct json_stream *result,
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const char *fieldname,
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const struct json_escaped *esc TAKES);
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/* '"fieldname" : literal' or 'literal' if fieldname is NULL*/
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void json_add_literal(struct json_stream *result, const char *fieldname,
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const char *literal, int len);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_double(struct json_stream *result, const char *fieldname,
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double value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_num(struct json_stream *result, const char *fieldname,
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unsigned int value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_u64(struct json_stream *result, const char *fieldname,
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uint64_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_s64(struct json_stream *result, const char *fieldname,
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int64_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_u32(struct json_stream *result, const char *fieldname,
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uint32_t value);
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/* '"fieldname" : value' or 'value' if fieldname is NULL */
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void json_add_s32(struct json_stream *result, const char *fieldname,
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int32_t value);
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/* '"fieldname" : true|false' or 'true|false' if fieldname is NULL */
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void json_add_bool(struct json_stream *result, const char *fieldname,
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bool value);
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/* '"fieldname" : null' or 'null' if fieldname is NULL */
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void json_add_null(struct json_stream *stream, const char *fieldname);
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/* '"fieldname" : "0189abcdef..."' or "0189abcdef..." if fieldname is NULL */
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void json_add_hex(struct json_stream *result, const char *fieldname,
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const void *data, size_t len);
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/* '"fieldname" : "0189abcdef..."' or "0189abcdef..." if fieldname is NULL */
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void json_add_hex_talarr(struct json_stream *result,
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const char *fieldname,
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const tal_t *data);
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/* '"fieldname" : "010000000001..."' or "010000000001..." if fieldname is NULL */
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void json_add_tx(struct json_stream *result,
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const char *fieldname,
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const struct bitcoin_tx *tx);
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/* Adds both a 'raw' number field and an 'amount_msat' field */
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void json_add_amount_msat_compat(struct json_stream *result,
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struct amount_msat msat,
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const char *rawfieldname,
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const char *msatfieldname)
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NO_NULL_ARGS;
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/* Adds both a 'raw' number field and an 'amount_msat' field */
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void json_add_amount_sat_compat(struct json_stream *result,
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struct amount_sat sat,
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const char *rawfieldname,
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const char *msatfieldname)
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NO_NULL_ARGS;
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/* Adds an 'msat' field */
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void json_add_amount_msat_only(struct json_stream *result,
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const char *msatfieldname,
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struct amount_msat msat)
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NO_NULL_ARGS;
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/* Adds an 'msat' field */
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void json_add_amount_sat_only(struct json_stream *result,
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const char *msatfieldname,
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struct amount_sat sat)
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NO_NULL_ARGS;
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enum address_parse_result {
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/* Not recognized as an onchain address */
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ADDRESS_PARSE_UNRECOGNIZED,
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/* Recognized as an onchain address, but targets wrong network */
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ADDRESS_PARSE_WRONG_NETWORK,
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/* Recognized and succeeds */
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ADDRESS_PARSE_SUCCESS,
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};
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/* Return result of address parsing and fills in *scriptpubkey
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* allocated off ctx if ADDRESS_PARSE_SUCCESS
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*/
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enum address_parse_result json_tok_address_scriptpubkey(const tal_t *ctx,
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const struct chainparams *chainparams,
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const char *buffer,
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const jsmntok_t *tok, const u8 **scriptpubkey);
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void json_add_timeabs(struct json_stream *result, const char *fieldname,
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struct timeabs t);
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/* used in log.c and notification.c*/
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void json_add_time(struct json_stream *result, const char *fieldname,
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struct timespec ts);
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#endif /* LIGHTNING_LIGHTNINGD_JSON_H */
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