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https://github.com/ElementsProject/lightning.git
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plugins/commando: basic commando plugin (no runes yet).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au Changelog-Added: Plugins: `commando` a new builtin plugin to send/recv peer commands over the lightning network, using runes.
This commit is contained in:
Rusty Russell
parent
3eccf16f98
commit
3fe246c2e7
3 changed files with 517 additions and 0 deletions
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@ -16,6 +16,9 @@ PLUGIN_TXPREPARE_OBJS := $(PLUGIN_TXPREPARE_SRC:.c=.o)
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PLUGIN_BCLI_SRC := plugins/bcli.c
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PLUGIN_BCLI_OBJS := $(PLUGIN_BCLI_SRC:.c=.o)
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PLUGIN_COMMANDO_SRC := plugins/commando.c
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PLUGIN_COMMANDO_OBJS := $(PLUGIN_COMMANDO_SRC:.c=.o)
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PLUGIN_KEYSEND_SRC := plugins/keysend.c
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PLUGIN_KEYSEND_OBJS := $(PLUGIN_KEYSEND_SRC:.c=.o)
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@ -60,6 +63,7 @@ PLUGIN_ALL_SRC := \
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$(PLUGIN_AUTOCLEAN_SRC) \
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$(PLUGIN_chanbackup_SRC) \
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$(PLUGIN_BCLI_SRC) \
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$(PLUGIN_COMMANDO_SRC) \
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$(PLUGIN_FETCHINVOICE_SRC) \
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$(PLUGIN_FUNDER_SRC) \
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$(PLUGIN_TOPOLOGY_SRC) \
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@ -83,6 +87,7 @@ C_PLUGINS := \
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plugins/autoclean \
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plugins/chanbackup \
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plugins/bcli \
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plugins/commando \
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plugins/fetchinvoice \
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plugins/funder \
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plugins/topology \
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@ -167,6 +172,8 @@ plugins/autoclean: bitcoin/chainparams.o $(PLUGIN_AUTOCLEAN_OBJS) $(PLUGIN_LIB_O
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plugins/chanbackup: bitcoin/chainparams.o $(PLUGIN_chanbackup_OBJS) $(PLUGIN_LIB_OBJS) $(PLUGIN_COMMON_OBJS) $(JSMN_OBJS)
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plugins/commando: $(PLUGIN_COMMANDO_OBJS) $(PLUGIN_LIB_OBJS) $(PLUGIN_COMMON_OBJS) $(JSMN_OBJS) bitcoin/chainparams.o
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# Topology wants to decode node_announcement, and peer_wiregen which
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# pulls in some of bitcoin/.
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plugins/topology: common/route.o common/dijkstra.o common/gossmap.o common/fp16.o bitcoin/chainparams.o wire/peer$(EXP)_wiregen.o wire/channel_type_wiregen.o bitcoin/block.o bitcoin/preimage.o $(PLUGIN_TOPOLOGY_OBJS) $(PLUGIN_LIB_OBJS) $(PLUGIN_COMMON_OBJS) $(JSMN_OBJS)
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467
plugins/commando.c
Normal file
467
plugins/commando.c
Normal file
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@ -0,0 +1,467 @@
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#include "config.h"
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#include <ccan/array_size/array_size.h>
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#include <ccan/tal/str/str.h>
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#include <common/json_param.h>
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#include <common/json_stream.h>
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#include <common/memleak.h>
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#include <common/pseudorand.h>
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#include <plugins/libplugin.h>
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/* We (as your local commando command) detected an error. */
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#define COMMANDO_ERROR_LOCAL 0x4c4f
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/* Remote (as executing your commando command) detected an error. */
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#define COMMANDO_ERROR_REMOTE 0x4c50
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/* Specifically: bad/missing rune */
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#define COMMANDO_ERROR_REMOTE_AUTH 0x4c51
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enum commando_msgtype {
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COMMANDO_MSG_CMD = 0x4c4f,
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/* Replies are split across multiple CONTINUES, then TERM. */
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COMMANDO_MSG_REPLY_CONTINUES = 0x594b,
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COMMANDO_MSG_REPLY_TERM = 0x594d,
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};
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struct commando {
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struct command *cmd;
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struct node_id peer;
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u64 id;
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/* This is set to NULL if they seem to be spamming us! */
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u8 *contents;
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};
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static struct plugin *plugin;
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static struct commando **outgoing_commands;
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/* NULL peer: don't care about peer. NULL id: don't care about id */
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static struct commando *find_commando(struct commando **arr,
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const struct node_id *peer,
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const u64 *id)
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{
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for (size_t i = 0; i < tal_count(arr); i++) {
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if (id && arr[i]->id != *id)
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continue;
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if (peer && !node_id_eq(&arr[i]->peer, peer))
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continue;
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return arr[i];
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}
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return NULL;
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}
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static void destroy_commando(struct commando *commando, struct commando ***arr)
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{
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for (size_t i = 0; i < tal_count(*arr); i++) {
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if ((*arr)[i] == commando) {
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tal_arr_remove(arr, i);
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return;
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}
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}
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abort();
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}
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/* Append to commando->contents: set to NULL if we've over max. */
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static void append_contents(struct commando *commando, const u8 *msg, size_t msglen,
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size_t maxlen)
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{
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size_t len = tal_count(commando->contents);
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if (!commando->contents)
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return;
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if (len + msglen > maxlen) {
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commando->contents = tal_free(commando->contents);
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return;
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}
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tal_resize(&commando->contents, len + msglen);
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memcpy(commando->contents + len, msg, msglen);
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}
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struct reply {
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struct commando *incoming;
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char *buf;
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size_t off, len;
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};
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static struct command_result *send_response(struct command *command UNUSED,
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const char *buf UNUSED,
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const jsmntok_t *result UNUSED,
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struct reply *reply)
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{
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size_t msglen = reply->len - reply->off;
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u8 *cmd_msg;
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enum commando_msgtype msgtype;
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struct out_req *req;
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/* Limit is 64k, but there's a little overhead */
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if (msglen > 65000) {
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msglen = 65000;
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msgtype = COMMANDO_MSG_REPLY_CONTINUES;
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/* We need to make a copy first time before we call back, since
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* plugin will reuse it! */
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if (reply->off == 0)
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reply->buf = tal_dup_talarr(reply, char, reply->buf);
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} else {
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if (msglen == 0) {
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tal_free(reply);
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return command_done();
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}
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msgtype = COMMANDO_MSG_REPLY_TERM;
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}
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cmd_msg = tal_arr(NULL, u8, 0);
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towire_u16(&cmd_msg, msgtype);
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towire_u64(&cmd_msg, reply->incoming->id);
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towire(&cmd_msg, reply->buf + reply->off, msglen);
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reply->off += msglen;
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req = jsonrpc_request_start(plugin, NULL, "sendcustommsg",
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send_response, send_response,
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reply);
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json_add_node_id(req->js, "node_id", &reply->incoming->peer);
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json_add_hex_talarr(req->js, "msg", cmd_msg);
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tal_free(cmd_msg);
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send_outreq(plugin, req);
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return command_done();
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}
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static struct command_result *cmd_done(struct command *command,
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const char *buf,
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const jsmntok_t *obj,
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struct commando *incoming)
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{
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struct reply *reply = tal(plugin, struct reply);
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reply->incoming = tal_steal(reply, incoming);
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reply->buf = (char *)buf;
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/* result is contents of "error" or "response": we want top-leve
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* object */
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reply->off = obj->start;
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reply->len = obj->end;
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return send_response(command, buf, obj, reply);
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}
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static void commando_error(struct commando *incoming,
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int ecode,
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const char *fmt, ...)
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PRINTF_FMT(3,4);
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static void commando_error(struct commando *incoming,
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int ecode,
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const char *fmt, ...)
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{
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struct reply *reply = tal(plugin, struct reply);
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va_list ap;
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reply->incoming = tal_steal(reply, incoming);
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reply->buf = tal_fmt(reply, "{\"error\":{\"code\":%i,\"message\":\"", ecode);
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va_start(ap, fmt);
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tal_append_vfmt(&reply->buf, fmt, ap);
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va_end(ap);
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tal_append_fmt(&reply->buf, "\"}}");
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reply->off = 0;
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reply->len = tal_bytelen(reply->buf) - 1;
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send_response(NULL, NULL, NULL, reply);
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}
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static const char *check_rune(struct commando *incoming,
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const char *buf,
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const jsmntok_t *method,
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const jsmntok_t *params,
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const jsmntok_t *rune)
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{
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/* FIXME! */
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return NULL;
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}
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static void try_command(struct node_id *peer,
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u64 idnum,
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const u8 *msg, size_t msglen)
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{
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struct commando *incoming = tal(plugin, struct commando);
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const jsmntok_t *toks, *method, *params, *rune;
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const char *buf = (const char *)msg, *failmsg;
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struct out_req *req;
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incoming->peer = *peer;
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incoming->id = idnum;
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toks = json_parse_simple(incoming, buf, msglen);
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if (!toks) {
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commando_error(incoming, COMMANDO_ERROR_REMOTE,
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"Invalid JSON");
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return;
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}
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if (toks[0].type != JSMN_OBJECT) {
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commando_error(incoming, COMMANDO_ERROR_REMOTE,
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"Not a JSON object");
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return;
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}
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method = json_get_member(buf, toks, "method");
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if (!method) {
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commando_error(incoming, COMMANDO_ERROR_REMOTE,
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"No method");
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return;
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}
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params = json_get_member(buf, toks, "params");
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if (params && params->type != JSMN_OBJECT) {
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commando_error(incoming, COMMANDO_ERROR_REMOTE,
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"Params must be object");
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return;
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}
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rune = json_get_member(buf, toks, "rune");
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failmsg = check_rune(incoming, buf, method, params, rune);
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if (failmsg) {
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commando_error(incoming, COMMANDO_ERROR_REMOTE_AUTH,
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"Not authorized: %s", failmsg);
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return;
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}
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/* We handle success and failure the same */
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req = jsonrpc_request_whole_object_start(plugin, NULL,
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json_strdup(tmpctx, buf,
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method),
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cmd_done, incoming);
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if (params) {
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size_t i;
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const jsmntok_t *t;
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json_object_start(req->js, "params");
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/* FIXME: This is ugly! */
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json_for_each_obj(i, t, params) {
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json_add_jsonstr(req->js,
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json_strdup(tmpctx, buf, t),
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json_tok_full(buf, t+1),
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json_tok_full_len(t+1));
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}
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json_object_end(req->js);
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} else {
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json_object_start(req->js, "params");
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json_object_end(req->js);
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}
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tal_free(toks);
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send_outreq(plugin, req);
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}
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static struct command_result *handle_reply(struct node_id *peer,
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u64 idnum,
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const u8 *msg, size_t msglen,
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bool terminal)
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{
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struct commando *ocmd;
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struct json_stream *res;
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const jsmntok_t *toks, *result, *err;
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const char *replystr;
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size_t i;
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const jsmntok_t *t;
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ocmd = find_commando(outgoing_commands, peer, &idnum);
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if (!ocmd) {
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plugin_log(plugin, LOG_DBG,
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"Ignoring unexpected %s reply from %s (id %"PRIu64")",
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terminal ? "terminal" : "partial",
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node_id_to_hexstr(tmpctx, peer),
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idnum);
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return NULL;
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}
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/* FIXME: We buffer, but ideally we would stream! */
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/* listchannels is 71MB, so we need to allow some headroom! */
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append_contents(ocmd, msg, msglen, 500*1024*1024);
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if (!terminal)
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return NULL;
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if (!ocmd->contents)
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return command_fail(ocmd->cmd, COMMANDO_ERROR_LOCAL, "Reply was oversize");
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replystr = (const char *)ocmd->contents;
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toks = json_parse_simple(ocmd, replystr, tal_bytelen(ocmd->contents));
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if (!toks || toks[0].type != JSMN_OBJECT)
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return command_fail(ocmd->cmd, COMMANDO_ERROR_LOCAL, "Reply was unparsable");
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err = json_get_member(replystr, toks, "error");
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if (err) {
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const jsmntok_t *code = json_get_member(replystr, err, "code");
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int ecode;
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const jsmntok_t *message = json_get_member(replystr, err, "message");
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if (!code || !json_to_int(replystr, code, &ecode)) {
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return command_fail(ocmd->cmd, COMMANDO_ERROR_LOCAL,
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"Error '%.*s' had no valid code",
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json_tok_full_len(err),
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json_tok_full(replystr, err));
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}
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if (!message) {
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return command_fail(ocmd->cmd, COMMANDO_ERROR_LOCAL,
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"Error had no message");
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}
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/* FIXME: data! */
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return command_fail(ocmd->cmd, ecode, "%.*s",
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message->end - message->start,
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replystr + message->start);
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}
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result = json_get_member(replystr, toks, "result");
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if (!result)
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return command_fail(ocmd->cmd, COMMANDO_ERROR_LOCAL, "Reply had no result");
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res = jsonrpc_stream_success(ocmd->cmd);
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/* FIXME: This is ugly! */
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json_for_each_obj(i, t, result) {
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json_add_jsonstr(res,
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json_strdup(tmpctx, replystr, t),
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json_tok_full(replystr, t+1),
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json_tok_full_len(t+1));
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}
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return command_finished(ocmd->cmd, res);
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}
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static struct command_result *handle_custommsg(struct command *cmd,
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const char *buf,
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const jsmntok_t *params)
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{
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struct node_id peer;
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const u8 *msg;
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size_t len;
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enum commando_msgtype mtype;
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u64 idnum;
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json_to_node_id(buf, json_get_member(buf, params, "peer_id"), &peer);
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msg = json_tok_bin_from_hex(cmd, buf,
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json_get_member(buf, params, "payload"));
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len = tal_bytelen(msg);
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mtype = fromwire_u16(&msg, &len);
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idnum = fromwire_u64(&msg, &len);
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if (msg) {
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switch (mtype) {
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case COMMANDO_MSG_CMD:
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try_command(&peer, idnum, msg, len);
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break;
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case COMMANDO_MSG_REPLY_CONTINUES:
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case COMMANDO_MSG_REPLY_TERM:
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handle_reply(&peer, idnum, msg, len,
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mtype == COMMANDO_MSG_REPLY_TERM);
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break;
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}
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}
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return command_hook_success(cmd);
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}
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static const struct plugin_hook hooks[] = {
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{
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"custommsg",
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handle_custommsg
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},
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};
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static struct command_result *send_success(struct command *command,
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const char *buf,
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const jsmntok_t *result,
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struct commando *incoming)
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{
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return command_still_pending(command);
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}
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static struct command_result *json_commando(struct command *cmd,
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const char *buffer,
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const jsmntok_t *params)
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{
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struct node_id *peer;
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const char *method, *cparams;
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const char *rune;
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struct commando *ocmd;
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struct out_req *req;
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u8 *cmd_msg;
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char *json;
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if (!param(cmd, buffer, params,
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p_req("peer_id", param_node_id, &peer),
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p_req("method", param_string, &method),
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p_opt("params", param_string, &cparams),
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p_opt("rune", param_string, &rune),
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NULL))
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return command_param_failed();
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ocmd = tal(cmd, struct commando);
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ocmd->cmd = cmd;
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ocmd->peer = *peer;
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ocmd->contents = tal_arr(ocmd, u8, 0);
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do {
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ocmd->id = pseudorand_u64();
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} while (find_commando(outgoing_commands, NULL, &ocmd->id));
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tal_arr_expand(&outgoing_commands, ocmd);
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tal_add_destructor2(ocmd, destroy_commando, &outgoing_commands);
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json = tal_fmt(tmpctx,
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"{\"method\":\"%s\",\"params\":%s", method,
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cparams ? cparams : "{}");
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if (rune)
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tal_append_fmt(&json, ",\"rune\":\"%s\"", rune);
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tal_append_fmt(&json, "}");
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cmd_msg = tal_arr(NULL, u8, 0);
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towire_u16(&cmd_msg, COMMANDO_MSG_CMD);
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towire_u64(&cmd_msg, ocmd->id);
|
||||
towire(&cmd_msg, json, strlen(json));
|
||||
req = jsonrpc_request_start(plugin, NULL, "sendcustommsg",
|
||||
send_success, forward_error, ocmd);
|
||||
json_add_node_id(req->js, "node_id", &ocmd->peer);
|
||||
json_add_hex_talarr(req->js, "msg", cmd_msg);
|
||||
tal_free(cmd_msg);
|
||||
|
||||
/* Keep memleak code happy! */
|
||||
tal_free(peer);
|
||||
tal_free(method);
|
||||
tal_free(cparams);
|
||||
|
||||
return send_outreq(plugin, req);
|
||||
}
|
||||
|
||||
#if DEVELOPER
|
||||
static void memleak_mark_globals(struct plugin *p, struct htable *memtable)
|
||||
{
|
||||
memleak_remove_region(memtable, outgoing_commands, tal_bytelen(outgoing_commands));
|
||||
}
|
||||
#endif
|
||||
|
||||
static const char *init(struct plugin *p,
|
||||
const char *buf UNUSED, const jsmntok_t *config UNUSED)
|
||||
{
|
||||
outgoing_commands = tal_arr(p, struct commando *, 0);
|
||||
plugin = p;
|
||||
#if DEVELOPER
|
||||
plugin_set_memleak_handler(p, memleak_mark_globals);
|
||||
#endif
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static const struct plugin_command commands[] = { {
|
||||
"commando",
|
||||
"utility",
|
||||
"Send a commando message to a direct peer, wait for response",
|
||||
"Sends {peer_id} {method} with optional {params} and {rune}",
|
||||
json_commando,
|
||||
}
|
||||
};
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
setup_locale();
|
||||
plugin_main(argv, init, PLUGIN_STATIC, true, NULL,
|
||||
commands, ARRAY_SIZE(commands),
|
||||
NULL, 0,
|
||||
hooks, ARRAY_SIZE(hooks),
|
||||
NULL, 0,
|
||||
NULL);
|
||||
}
|
||||
|
|
@ -2544,3 +2544,46 @@ def test_plugin_shutdown(node_factory):
|
|||
l1.daemon.wait_for_logs(['test_libplugin: shutdown called',
|
||||
'misc_notifications.py: via lightningd shutdown, datastore failed',
|
||||
'test_libplugin: failed to self-terminate in time, killing.'])
|
||||
|
||||
|
||||
def test_commando(node_factory):
|
||||
l1, l2 = node_factory.line_graph(2, fundchannel=False)
|
||||
|
||||
# This works
|
||||
res = l2.rpc.call(method='commando',
|
||||
payload={'peer_id': l1.info['id'],
|
||||
'method': 'listpeers'})
|
||||
assert len(res['peers']) == 1
|
||||
assert res['peers'][0]['id'] == l2.info['id']
|
||||
|
||||
res = l2.rpc.call(method='commando',
|
||||
payload={'peer_id': l1.info['id'],
|
||||
'method': 'listpeers',
|
||||
'params': {'id': l2.info['id']}})
|
||||
assert len(res['peers']) == 1
|
||||
assert res['peers'][0]['id'] == l2.info['id']
|
||||
|
||||
with pytest.raises(RpcError, match='missing required parameter'):
|
||||
l2.rpc.call(method='commando',
|
||||
payload={'peer_id': l1.info['id'],
|
||||
'method': 'withdraw'})
|
||||
|
||||
with pytest.raises(RpcError, match='unknown parameter: foobar'):
|
||||
l2.rpc.call(method='commando',
|
||||
payload={'peer_id': l1.info['id'],
|
||||
'method': 'invoice',
|
||||
'params': {'foobar': 1}})
|
||||
|
||||
ret = l2.rpc.call(method='commando',
|
||||
payload={'peer_id': l1.info['id'],
|
||||
'method': 'ping',
|
||||
'params': {'id': l2.info['id']}})
|
||||
assert 'totlen' in ret
|
||||
|
||||
# Now, reply will go over a multiple messages!
|
||||
ret = l2.rpc.call(method='commando',
|
||||
payload={'peer_id': l1.info['id'],
|
||||
'method': 'getlog',
|
||||
'params': {'level': 'io'}})
|
||||
|
||||
assert len(json.dumps(ret)) > 65535
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue