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libplugin: demarshal and stash the feature set given by lightningd.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2020-04-02 14:36:47 +10:30
parent 7a95e90ee4
commit 8cb364dd28
2 changed files with 42 additions and 1 deletions
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40
plugins/libplugin.c
View file

@ -5,6 +5,7 @@
#include <ccan/read_write_all/read_write_all.h>
#include <ccan/tal/str/str.h>
#include <common/daemon.h>
#include <common/features.h>
#include <common/json_stream.h>
#include <common/utils.h>
#include <errno.h>
@ -82,6 +83,9 @@ struct plugin {
/* Timers */
struct timers timers;
size_t in_timer;
/* Feature set for lightningd */
struct feature_set *fset;
};
@ -148,6 +152,11 @@ jsonrpc_request_start_(struct plugin *plugin, struct command *cmd,
return out;
}
const struct feature_set *plugin_feature_set(const struct plugin *p)
{
return p->fset;
}
static void jsonrpc_finish_and_send(struct plugin *p, struct json_stream *js)
{
json_object_compat_end(js);
@ -710,11 +719,37 @@ static struct io_plan *rpc_conn_init(struct io_conn *conn,
rpc_conn_write_request(conn, plugin));
}
static struct feature_set *json_to_feature_set(struct plugin *plugin,
const char *buf,
const jsmntok_t *features)
{
struct feature_set *fset = talz(plugin, struct feature_set);
const jsmntok_t *t;
size_t i;
json_for_each_obj(i, t, features) {
enum feature_place p;
if (json_tok_streq(buf, t, "init"))
p = INIT_FEATURE;
else if (json_tok_streq(buf, t, "node"))
p = NODE_ANNOUNCE_FEATURE;
else if (json_tok_streq(buf, t, "channel"))
p = CHANNEL_FEATURE;
else if (json_tok_streq(buf, t, "invoice"))
p = BOLT11_FEATURE;
else
continue;
fset->bits[p] = json_tok_bin_from_hex(fset, buf, t + 1);
}
return fset;
}
static struct command_result *handle_init(struct command *cmd,
const char *buf,
const jsmntok_t *params)
{
const jsmntok_t *configtok, *rpctok, *dirtok, *opttok, *nettok, *t;
const jsmntok_t *configtok, *rpctok, *dirtok, *opttok, *nettok, *fsettok,
*t;
struct sockaddr_un addr;
size_t i;
char *dir, *network;
@ -734,6 +769,9 @@ static struct command_result *handle_init(struct command *cmd,
network = json_strdup(tmpctx, buf, nettok);
chainparams = chainparams_for_network(network);
fsettok = json_delve(buf, configtok, ".feature_set");
p->fset = json_to_feature_set(p, buf, fsettok);
rpctok = json_delve(buf, configtok, ".rpc-file");
p->rpc_conn->fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (rpctok->end - rpctok->start + 1 > sizeof(addr.sun_path))

3
plugins/libplugin.h
View file

@ -90,6 +90,9 @@ struct plugin_hook {
const jsmntok_t *params);
};
/* Return the feature set of the current lightning node */
const struct feature_set *plugin_feature_set(const struct plugin *p);
/* Helper to create a JSONRPC2 request stream. Send it with `send_outreq`. */
struct out_req *
jsonrpc_request_start_(struct plugin *plugin, struct command *cmd,