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ce0bd7abd3
There's a DoS if we keep reading commands and don't insist the client read the responses. My initial implementation simply removed the io_duplex, but that doesn't work if we want to inject notifications in the stream (as we will eventually want to do), so we operate it as duplex but have each side wake the other when it's done. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
#ifndef LIGHTNING_LIGHTNINGD_JSONRPC_H
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#define LIGHTNING_LIGHTNINGD_JSONRPC_H
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#include "config.h"
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#include <bitcoin/chainparams.h>
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#include <ccan/autodata/autodata.h>
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#include <ccan/list/list.h>
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#include <common/io_lock.h>
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#include <common/json.h>
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struct bitcoin_txid;
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struct wireaddr;
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struct wallet_tx;
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/* The command mode tells param() how to process. */
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enum command_mode {
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/* Normal command processing */
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CMD_NORMAL,
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/* Create command usage string, nothing else. */
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CMD_USAGE
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};
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/* Context for a command (from JSON, but might outlive the connection!)
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* You can allocate off this for temporary objects. */
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struct command {
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/* The global state */
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struct lightningd *ld;
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/* The 'id' which we need to include in the response. */
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const char *id;
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/* What command we're running (for logging) */
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const struct json_command *json_cmd;
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/* The connection, or NULL if it closed. */
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struct json_connection *jcon;
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/* Have we been marked by command_still_pending? For debugging... */
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bool pending;
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/* Tell param() how to process the command */
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enum command_mode mode;
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/* This is created if mode is CMD_USAGE */
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const char *usage;
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bool *ok;
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};
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struct json_connection {
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/* The global state */
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struct lightningd *ld;
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/* Logging for this json connection. */
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struct log *log;
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/* The buffer (required to interpret tokens). */
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char *buffer;
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/* Internal state: */
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/* How much is already filled. */
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size_t used;
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/* How much has just been filled. */
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size_t len_read;
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/* We've been told to stop. */
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bool stop;
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/* Current command. */
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struct command *command;
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/* Current command's output. */
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const char *outbuf;
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struct io_lock *lock;
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};
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struct json_command {
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const char *name;
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void (*dispatch)(struct command *,
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const char *buffer, const jsmntok_t *params);
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const char *description;
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bool deprecated;
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const char *verbose;
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};
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struct json_result *null_response(const tal_t *ctx);
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void command_success(struct command *cmd, struct json_result *response);
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void PRINTF_FMT(3, 4) command_fail(struct command *cmd, int code,
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const char *fmt, ...);
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void PRINTF_FMT(4, 5) command_fail_detailed(struct command *cmd,
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int code,
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const struct json_result *data,
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const char *fmt, ...);
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/* Mainly for documentation, that we plan to close this later. */
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void command_still_pending(struct command *cmd);
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/* For initialization */
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void setup_jsonrpc(struct lightningd *ld, const char *rpc_filename);
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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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/* Parse the satoshi token in wallet_tx. */
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bool json_tok_wtx(struct wallet_tx * tx, const char * buffer,
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const jsmntok_t * sattok, u64 max);
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AUTODATA_TYPE(json_command, struct json_command);
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#endif /* LIGHTNING_LIGHTNINGD_JSONRPC_H */
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