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sql.c
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/* Brilliant or insane? You decide! */
#include "config.h"
#include <ccan/array_size/array_size.h>
#include <ccan/err/err.h>
#include <ccan/strmap/strmap.h>
#include <ccan/tal/str/str.h>
#include <common/gossip_store.h>
#include <common/json_param.h>
#include <common/json_stream.h>
#include <common/memleak.h>
#include <common/setup.h>
#include <common/type_to_string.h>
#include <errno.h>
#include <fcntl.h>
#include <gossipd/gossip_store_wiregen.h>
#include <plugins/libplugin.h>
#include <sqlite3.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
/* Minimized schemas. C23 #embed, Where Art Thou? */
static const char schemas[] =
#include "sql-schema_gen.h"
;
/* TODO:
* 2. Refresh time in API.
* 6. test on mainnet.
* 7. Some cool query for documentation.
* 8. time_msec fields.
* 10. Pagination API
*/
enum fieldtype {
/* Hex variants */
FIELD_HEX,
FIELD_HASH,
FIELD_SECRET,
FIELD_PUBKEY,
FIELD_TXID,
/* Integer variants */
FIELD_MSAT,
FIELD_INTEGER,
FIELD_U64,
FIELD_U32,
FIELD_U16,
FIELD_U8,
FIELD_BOOL,
/* Randoms */
FIELD_NUMBER,
FIELD_STRING,
FIELD_SCID,
};
struct fieldtypemap {
const char *name;
const char *sqltype;
};
static const struct fieldtypemap fieldtypemap[] = {
{ "hex", "BLOB" }, /* FIELD_HEX */
{ "hash", "BLOB" }, /* FIELD_HASH */
{ "secret", "BLOB" }, /* FIELD_SECRET */
{ "pubkey", "BLOB" }, /* FIELD_PUBKEY */
{ "txid", "BLOB" }, /* FIELD_TXID */
{ "msat", "INTEGER" }, /* FIELD_MSAT */
{ "integer", "INTEGER" }, /* FIELD_INTEGER */
{ "u64", "INTEGER" }, /* FIELD_U64 */
{ "u32", "INTEGER" }, /* FIELD_U32 */
{ "u16", "INTEGER" }, /* FIELD_U16 */
{ "u8", "INTEGER" }, /* FIELD_U8 */
{ "boolean", "INTEGER" }, /* FIELD_BOOL */
{ "number", "REAL" }, /* FIELD_NUMBER */
{ "string", "TEXT" }, /* FIELD_STRING */
{ "short_channel_id", "TEXT" }, /* FIELD_SCID */
};
struct column {
/* We rename some fields to avoid sql keywords!
* And jsonname is NULL if this is a simple array. */
const char *dbname, *jsonname;
enum fieldtype ftype;
/* If this is actually a subtable: */
struct table_desc *sub;
};
struct db_query {
sqlite3_stmt *stmt;
struct table_desc **tables;
const char *authfail;
};
struct table_desc {
/* e.g. listpeers. For sub-tables, the raw name without
* parent prepended */
const char *cmdname;
/* e.g. peers for listpeers, peers_channels for listpeers.channels. */
const char *name;
/* e.g. "payments" for listsendpays */
const char *arrname;
struct column *columns;
char *update_stmt;
/* If we are a subtable */
struct table_desc *parent;
/* Is this a sub object (otherwise, subarray if parent is true) */
bool is_subobject;
/* function to refresh it. */
struct command_result *(*refresh)(struct command *cmd,
const struct table_desc *td,
struct db_query *dbq);
};
static STRMAP(struct table_desc *) tablemap;
static size_t max_dbmem = 500000000;
static struct sqlite3 *db;
static char *dbfilename;
static int gosstore_fd = -1;
static size_t gosstore_nodes_off = 0, gosstore_channels_off = 0;
static u64 next_rowid = 1;
/* It was tempting to put these in the schema, but they're really
* just for our usage. Though that would allow us to autogen the
* documentation, too. */
struct index {
const char *tablename;
const char *fields[2];
};
static const struct index indices[] = {
{
"channels",
{ "short_channel_id", NULL },
},
{
"forwards",
{ "in_channel", "in_htlc_id" },
},
{
"htlcs",
{ "short_channel_id", "id" },
},
{
"invoices",
{ "payment_hash", NULL },
},
{
"nodes",
{ "nodeid", NULL },
},
{
"offers",
{ "offer_id", NULL },
},
{
"peers",
{ "id", NULL },
},
{
"peerchannels",
{ "peer_id", NULL },
},
{
"sendpays",
{ "payment_hash", NULL },
},
{
"transactions",
{ "hash", NULL },
},
};
static enum fieldtype find_fieldtype(const jsmntok_t *name)
{
for (size_t i = 0; i < ARRAY_SIZE(fieldtypemap); i++) {
if (json_tok_streq(schemas, name, fieldtypemap[i].name))
return i;
}
errx(1, "Unknown JSON type %.*s",
name->end - name->start, schemas + name->start);
}
static struct sqlite3 *sqlite_setup(struct plugin *plugin)
{
int err;
struct sqlite3 *db;
char *errmsg;
if (dbfilename) {
err = sqlite3_open_v2(dbfilename, &db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE,
NULL);
} else {
err = sqlite3_open_v2("", &db,
SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE
| SQLITE_OPEN_MEMORY,
NULL);
}
if (err != SQLITE_OK)
plugin_err(plugin, "Could not create db: errcode %u", err);
sqlite3_extended_result_codes(db, 1);
/* From https://www.sqlite.org/c3ref/set_authorizer.html:
*
* Applications that need to process SQL from untrusted
* sources might also consider lowering resource limits using
* sqlite3_limit() and limiting database size using the
* max_page_count PRAGMA in addition to using an authorizer.
*/
sqlite3_limit(db, SQLITE_LIMIT_LENGTH, 1000000);
sqlite3_limit(db, SQLITE_LIMIT_SQL_LENGTH, 10000);
sqlite3_limit(db, SQLITE_LIMIT_COLUMN, 100);
sqlite3_limit(db, SQLITE_LIMIT_EXPR_DEPTH, 100);
sqlite3_limit(db, SQLITE_LIMIT_COMPOUND_SELECT, 10);
sqlite3_limit(db, SQLITE_LIMIT_VDBE_OP, 1000);
sqlite3_limit(db, SQLITE_LIMIT_ATTACHED, 1);
sqlite3_limit(db, SQLITE_LIMIT_LIKE_PATTERN_LENGTH, 500);
sqlite3_limit(db, SQLITE_LIMIT_VARIABLE_NUMBER, 100);
sqlite3_limit(db, SQLITE_LIMIT_TRIGGER_DEPTH, 1);
sqlite3_limit(db, SQLITE_LIMIT_WORKER_THREADS, 1);
/* Default is now 4k pages, so allow 500MB */
err = sqlite3_exec(db, tal_fmt(tmpctx, "PRAGMA max_page_count = %zu;",
max_dbmem / 4096),
NULL, NULL, &errmsg);
if (err != SQLITE_OK)
plugin_err(plugin, "Could not set max_page_count: %s", errmsg);
err = sqlite3_exec(db, "PRAGMA foreign_keys = ON;", NULL, NULL, &errmsg);
if (err != SQLITE_OK)
plugin_err(plugin, "Could not set foreign_keys: %s", errmsg);
return db;
}
static bool has_table_desc(struct table_desc **tables, struct table_desc *t)
{
for (size_t i = 0; i < tal_count(tables); i++) {
if (tables[i] == t)
return true;
}
return false;
}
static int sqlite_authorize(void *dbq_, int code,
const char *a,
const char *b,
const char *c,
const char *d)
{
struct db_query *dbq = dbq_;
/* You can do select statements */
if (code == SQLITE_SELECT)
return SQLITE_OK;
/* You can do a column read: takes a table name */
if (code == SQLITE_READ) {
struct table_desc *td = strmap_get(&tablemap, a);
if (!td) {
dbq->authfail = tal_fmt(dbq, "Unknown table %s", a);
return SQLITE_DENY;
}
/* If it has a parent, we refresh that instead */
while (td->parent)
td = td->parent;
if (!has_table_desc(dbq->tables, td))
tal_arr_expand(&dbq->tables, td);
return SQLITE_OK;
}
/* Some functions are fairly necessary: */
if (code == SQLITE_FUNCTION) {
if (streq(b, "abs"))
return SQLITE_OK;
if (streq(b, "avg"))
return SQLITE_OK;
if (streq(b, "coalesce"))
return SQLITE_OK;
if (streq(b, "count"))
return SQLITE_OK;
if (streq(b, "hex"))
return SQLITE_OK;
if (streq(b, "quote"))
return SQLITE_OK;
if (streq(b, "length"))
return SQLITE_OK;
if (streq(b, "like"))
return SQLITE_OK;
if (streq(b, "lower"))
return SQLITE_OK;
if (streq(b, "upper"))
return SQLITE_OK;
if (streq(b, "min"))
return SQLITE_OK;
if (streq(b, "max"))
return SQLITE_OK;
if (streq(b, "sum"))
return SQLITE_OK;
if (streq(b, "total"))
return SQLITE_OK;
}
/* See https://www.sqlite.org/c3ref/c_alter_table.html to decode these! */
dbq->authfail = tal_fmt(dbq, "Unauthorized: %u arg1=%s arg2=%s dbname=%s caller=%s",
code,
a ? a : "(none)",
b ? b : "(none)",
c ? c : "(none)",
d ? d : "(none)");
return SQLITE_DENY;
}
static struct command_result *refresh_complete(struct command *cmd,
struct db_query *dbq)
{
char *errmsg;
int err, num_cols;
size_t num_rows;
struct json_stream *ret;
num_cols = sqlite3_column_count(dbq->stmt);
/* We normally hit an error immediately, so return a simple error then */
ret = NULL;
num_rows = 0;
errmsg = NULL;
while ((err = sqlite3_step(dbq->stmt)) == SQLITE_ROW) {
if (!ret) {
ret = jsonrpc_stream_success(cmd);
json_array_start(ret, "rows");
}
json_array_start(ret, NULL);
for (size_t i = 0; i < num_cols; i++) {
/* The returned value is one of
* SQLITE_INTEGER, SQLITE_FLOAT, SQLITE_TEXT,
* SQLITE_BLOB, or SQLITE_NULL */
switch (sqlite3_column_type(dbq->stmt, i)) {
case SQLITE_INTEGER: {
s64 v = sqlite3_column_int64(dbq->stmt, i);
json_add_s64(ret, NULL, v);
break;
}
case SQLITE_FLOAT: {
double v = sqlite3_column_double(dbq->stmt, i);
json_add_primitive_fmt(ret, NULL, "%f", v);
break;
}
case SQLITE_TEXT: {
const char *c = (char *)sqlite3_column_text(dbq->stmt, i);
if (!utf8_check(c, strlen(c))) {
json_add_str_fmt(ret, NULL,
"INVALID UTF-8 STRING %s",
tal_hexstr(tmpctx, c, strlen(c)));
errmsg = tal_fmt(cmd, "Invalid UTF-8 string row %zu column %zu",
num_rows, i);
} else
json_add_string(ret, NULL, c);
break;
}
case SQLITE_BLOB:
json_add_hex(ret, NULL,
sqlite3_column_blob(dbq->stmt, i),
sqlite3_column_bytes(dbq->stmt, i));
break;
case SQLITE_NULL:
json_add_primitive(ret, NULL, "null");
break;
default:
errmsg = tal_fmt(cmd, "Unknown column type %i in row %zu column %zu",
sqlite3_column_type(dbq->stmt, i),
num_rows, i);
}
}
json_array_end(ret);
num_rows++;
}
if (err != SQLITE_DONE)
errmsg = tal_fmt(cmd, "Executing statement: %s",
sqlite3_errmsg(db));
sqlite3_finalize(dbq->stmt);
/* OK, did we hit some error during? Simple if we didn't
* already start answering! */
if (errmsg) {
if (!ret)
return command_fail(cmd, LIGHTNINGD, "%s", errmsg);
/* Otherwise, add it as a warning */
json_array_end(ret);
json_add_string(ret, "warning_db_failure", errmsg);
} else {
/* Empty result is possible, OK. */
if (!ret) {
ret = jsonrpc_stream_success(cmd);
json_array_start(ret, "rows");
}
json_array_end(ret);
}
return command_finished(cmd, ret);
}
/* Recursion */
static struct command_result *refresh_tables(struct command *cmd,
struct db_query *dbq);
static struct command_result *one_refresh_done(struct command *cmd,
struct db_query *dbq)
{
/* Remove that, iterate */
tal_arr_remove(&dbq->tables, 0);
return refresh_tables(cmd, dbq);
}
/* Mutual recursion */
static struct command_result *process_json_list(struct command *cmd,
const char *buf,
const jsmntok_t *arr,
const u64 *rowid,
const struct table_desc *td);
/* Process all subobject columns */
static struct command_result *process_json_subobjs(struct command *cmd,
const char *buf,
const jsmntok_t *t,
const struct table_desc *td,
u64 this_rowid)
{
for (size_t i = 0; i < tal_count(td->columns); i++) {
const struct column *col = &td->columns[i];
struct command_result *ret;
const jsmntok_t *coltok;
if (!col->sub)
continue;
coltok = json_get_member(buf, t, col->jsonname);
if (!coltok)
continue;
/* If it's an array, use process_json_list */
if (!col->sub->is_subobject) {
ret = process_json_list(cmd, buf, coltok, &this_rowid,
col->sub);
} else {
ret = process_json_subobjs(cmd, buf, coltok, col->sub,
this_rowid);
}
if (ret)
return ret;
}
return NULL;
}
/* Returns NULL on success, otherwise has failed cmd. */
static struct command_result *process_json_obj(struct command *cmd,
const char *buf,
const jsmntok_t *t,
const struct table_desc *td,
size_t row,
u64 this_rowid,
const u64 *parent_rowid,
size_t *sqloff,
sqlite3_stmt *stmt)
{
int err;
/* Subtables have row, arrindex as first two columns. */
if (parent_rowid) {
sqlite3_bind_int64(stmt, (*sqloff)++, *parent_rowid);
sqlite3_bind_int64(stmt, (*sqloff)++, row);
}
/* FIXME: This is O(n^2): hash td->columns and look up the other way. */
for (size_t i = 0; i < tal_count(td->columns); i++) {
const struct column *col = &td->columns[i];
const jsmntok_t *coltok;
if (col->sub) {
struct command_result *ret;
/* Handle sub-tables below: we need rowid! */
if (!col->sub->is_subobject)
continue;
coltok = json_get_member(buf, t, col->jsonname);
ret = process_json_obj(cmd, buf, coltok, col->sub, row, this_rowid,
NULL, sqloff, stmt);
if (ret)
return ret;
continue;
}
/* This can happen if subobject does not exist in output! */
if (!t)
coltok = NULL;
else {
/* Array of primitives? */
if (!col->jsonname)
coltok = t;
else
coltok = json_get_member(buf, t, col->jsonname);
}
if (!coltok) {
if (td->parent)
plugin_log(cmd->plugin, LOG_DBG,
"Did not find json %s for %s in %.*s",
col->jsonname, td->name,
t ? json_tok_full_len(t) : 4, t ? json_tok_full(buf, t): "NULL");
sqlite3_bind_null(stmt, (*sqloff)++);
} else {
u64 val64;
struct amount_msat valmsat;
u8 *valhex;
double valdouble;
bool valbool;
switch (col->ftype) {
case FIELD_U8:
case FIELD_U16:
case FIELD_U32:
case FIELD_U64:
case FIELD_INTEGER:
if (!json_to_u64(buf, coltok, &val64)) {
return command_fail(cmd, LIGHTNINGD,
"column %zu row %zu not a u64: %.*s",
i, row,
json_tok_full_len(coltok),
json_tok_full(buf, coltok));
}
sqlite3_bind_int64(stmt, (*sqloff)++, val64);
break;
case FIELD_BOOL:
if (!json_to_bool(buf, coltok, &valbool)) {
return command_fail(cmd, LIGHTNINGD,
"column %zu row %zu not a boolean: %.*s",
i, row,
json_tok_full_len(coltok),
json_tok_full(buf, coltok));
}
sqlite3_bind_int(stmt, (*sqloff)++, valbool);
break;
case FIELD_NUMBER:
if (!json_to_double(buf, coltok, &valdouble)) {
return command_fail(cmd, LIGHTNINGD,
"column %zu row %zu not a double: %.*s",
i, row,
json_tok_full_len(coltok),
json_tok_full(buf, coltok));
}
sqlite3_bind_double(stmt, (*sqloff)++, valdouble);
break;
case FIELD_MSAT:
if (!json_to_msat(buf, coltok, &valmsat)) {
return command_fail(cmd, LIGHTNINGD,
"column %zu row %zu not an msat: %.*s",
i, row,
json_tok_full_len(coltok),
json_tok_full(buf, coltok));
}
sqlite3_bind_int64(stmt, (*sqloff)++, valmsat.millisatoshis /* Raw: db */);
break;
case FIELD_SCID:
case FIELD_STRING:
sqlite3_bind_text(stmt, (*sqloff)++, buf + coltok->start,
coltok->end - coltok->start,
SQLITE_STATIC);
break;
case FIELD_HEX:
case FIELD_HASH:
case FIELD_SECRET:
case FIELD_PUBKEY:
case FIELD_TXID:
valhex = json_tok_bin_from_hex(tmpctx, buf, coltok);
if (!valhex) {
return command_fail(cmd, LIGHTNINGD,
"column %zu row %zu not valid hex: %.*s",
i, row,
json_tok_full_len(coltok),
json_tok_full(buf, coltok));
}
sqlite3_bind_blob(stmt, (*sqloff)++, valhex, tal_count(valhex),
SQLITE_STATIC);
break;
}
}
}
/* Sub objects get folded into parent's SQL */
if (td->parent && td->is_subobject)
return NULL;
err = sqlite3_step(stmt);
if (err != SQLITE_DONE) {
return command_fail(cmd, LIGHTNINGD,
"Error executing %s on row %zu: %s",
td->update_stmt,
row,
sqlite3_errmsg(db));
}
return process_json_subobjs(cmd, buf, t, td, this_rowid);
}
/* A list, such as in the top-level reply, or for a sub-table */
static struct command_result *process_json_list(struct command *cmd,
const char *buf,
const jsmntok_t *arr,
const u64 *parent_rowid,
const struct table_desc *td)
{
size_t i;
const jsmntok_t *t;
int err;
sqlite3_stmt *stmt;
struct command_result *ret = NULL;
err = sqlite3_prepare_v2(db, td->update_stmt, -1, &stmt, NULL);
if (err != SQLITE_OK) {
return command_fail(cmd, LIGHTNINGD, "preparing '%s' failed: %s",
td->update_stmt,
sqlite3_errmsg(db));
}
json_for_each_arr(i, t, arr) {
/* sqlite3 columns are 1-based! */
size_t off = 1;
u64 this_rowid = next_rowid++;
/* First entry is always the rowid */
sqlite3_bind_int64(stmt, off++, this_rowid);
ret = process_json_obj(cmd, buf, t, td, i, this_rowid, parent_rowid, &off, stmt);
if (ret)
break;
sqlite3_reset(stmt);
}
sqlite3_finalize(stmt);
return ret;
}
/* Process top-level JSON result object */
static struct command_result *process_json_result(struct command *cmd,
const char *buf,
const jsmntok_t *result,
const struct table_desc *td)
{
return process_json_list(cmd, buf,
json_get_member(buf, result, td->arrname),
NULL, td);
}
static struct command_result *default_list_done(struct command *cmd,
const char *buf,
const jsmntok_t *result,
struct db_query *dbq)
{
const struct table_desc *td = dbq->tables[0];
struct command_result *ret;
int err;
char *errmsg;
/* FIXME: this is where a wait / pagination API is useful! */
err = sqlite3_exec(db, tal_fmt(tmpctx, "DELETE FROM %s;", td->name),
NULL, NULL, &errmsg);
if (err != SQLITE_OK) {
return command_fail(cmd, LIGHTNINGD, "cleaning '%s' failed: %s",
td->name, errmsg);
}
ret = process_json_result(cmd, buf, result, td);
if (ret)
return ret;
return one_refresh_done(cmd, dbq);
}
static struct command_result *default_refresh(struct command *cmd,
const struct table_desc *td,
struct db_query *dbq)
{
struct out_req *req;
req = jsonrpc_request_start(cmd->plugin, cmd, td->cmdname,
default_list_done, forward_error,
dbq);
return send_outreq(cmd->plugin, req);
}
static bool extract_scid(int gosstore_fd, size_t off, u16 type,
struct short_channel_id *scid)
{
be64 raw;
/* BOLT #7:
* 1. type: 258 (`channel_update`)
* 2. data:
* * [`signature`:`signature`]
* * [`chain_hash`:`chain_hash`]
* * [`short_channel_id`:`short_channel_id`]
*/
/* Note that first two bytes are message type */
const size_t update_scid_off = 2 + (64 + 32);
off += sizeof(struct gossip_hdr);
/* For delete_chan scid immediately follows type */
if (type == WIRE_GOSSIP_STORE_DELETE_CHAN)
off += 2;
else if (type == WIRE_GOSSIP_STORE_PRIVATE_UPDATE)
/* Prepend header */
off += 2 + 2 + update_scid_off;
else if (type == WIRE_CHANNEL_UPDATE)
off += update_scid_off;
else
abort();
if (pread(gosstore_fd, &raw, sizeof(raw), off) != sizeof(raw))
return false;
scid->u64 = be64_to_cpu(raw);
return true;
}
/* Note: this deletes up to two rows, one for each direction. */
static void delete_channel_from_db(struct command *cmd,
struct short_channel_id scid)
{
int err;
char *errmsg;
err = sqlite3_exec(db,
tal_fmt(tmpctx,
"DELETE FROM channels"
" WHERE short_channel_id = '%s'",
short_channel_id_to_str(tmpctx, &scid)),
NULL, NULL, &errmsg);
if (err != SQLITE_OK)
plugin_err(cmd->plugin, "Could not delete from channels: %s",
errmsg);
}
static struct command_result *channels_refresh(struct command *cmd,
const struct table_desc *td,
struct db_query *dbq);
static struct command_result *listchannels_one_done(struct command *cmd,
const char *buf,
const jsmntok_t *result,
struct db_query *dbq)
{
const struct table_desc *td = dbq->tables[0];
struct command_result *ret;
ret = process_json_result(cmd, buf, result, td);
if (ret)
return ret;
/* Continue to refresh more channels */
return channels_refresh(cmd, td, dbq);
}
static struct command_result *channels_refresh(struct command *cmd,
const struct table_desc *td,
struct db_query *dbq)
{
struct out_req *req;
size_t msglen;
u16 type, flags;
if (gosstore_fd == -1) {
gosstore_fd = open("gossip_store", O_RDONLY);
if (gosstore_fd == -1)
plugin_err(cmd->plugin, "Could not open gossip_store: %s",
strerror(errno));
}
/* First time, set off to end and load from scratch */
if (gosstore_channels_off == 0) {
gosstore_channels_off = find_gossip_store_end(gosstore_fd, 1);
return default_refresh(cmd, td, dbq);
}
plugin_log(cmd->plugin, LOG_DBG, "Refreshing channels @%zu...",
gosstore_channels_off);
/* OK, try catching up! */
while (gossip_store_readhdr(gosstore_fd, gosstore_channels_off,
&msglen, NULL, &flags, &type)) {
struct short_channel_id scid;
size_t off = gosstore_channels_off;
gosstore_channels_off += sizeof(struct gossip_hdr) + msglen;
if (flags & GOSSIP_STORE_DELETED_BIT)
continue;
if (type == WIRE_GOSSIP_STORE_ENDED) {
/* Force a reopen */
gosstore_channels_off = gosstore_nodes_off = 0;
close(gosstore_fd);
gosstore_fd = -1;
return channels_refresh(cmd, td, dbq);
}
/* If we see a channel_announcement, we don't care until we
* see the channel_update */
if (type == WIRE_CHANNEL_UPDATE
|| type == WIRE_GOSSIP_STORE_PRIVATE_UPDATE) {
/* This can fail if entry not fully written yet. */
if (!extract_scid(gosstore_fd, off, type, &scid)) {
gosstore_channels_off = off;
break;
}
plugin_log(cmd->plugin, LOG_DBG, "Refreshing channel: %s",
type_to_string(tmpctx, struct short_channel_id, &scid));
/* FIXME: sqlite 3.24.0 (2018-06-04) added UPSERT, but
* we don't require it. */
delete_channel_from_db(cmd, scid);
req = jsonrpc_request_start(cmd->plugin, cmd, "listchannels",
listchannels_one_done,
forward_error,
dbq);
json_add_short_channel_id(req->js, "short_channel_id", &scid);
return send_outreq(cmd->plugin, req);
} else if (type == WIRE_GOSSIP_STORE_DELETE_CHAN) {
/* This can fail if entry not fully written yet. */
if (!extract_scid(gosstore_fd, off, type, &scid)) {
gosstore_channels_off = off;
break;
}
plugin_log(cmd->plugin, LOG_DBG, "Deleting channel: %s",
type_to_string(tmpctx, struct short_channel_id, &scid));
delete_channel_from_db(cmd, scid);
}
}
return one_refresh_done(cmd, dbq);
}
static struct command_result *nodes_refresh(struct command *cmd,
const struct table_desc *td,
struct db_query *dbq);
static struct command_result *listnodes_one_done(struct command *cmd,
const char *buf,
const jsmntok_t *result,
struct db_query *dbq)
{
const struct table_desc *td = dbq->tables[0];
struct command_result *ret;
ret = process_json_result(cmd, buf, result, td);
if (ret)
return ret;
/* Continue to refresh more nodes */
return nodes_refresh(cmd, td, dbq);
}
static void delete_node_from_db(struct command *cmd,
const struct node_id *id)
{
int err;
char *errmsg;
err = sqlite3_exec(db,
tal_fmt(tmpctx,
"DELETE FROM nodes"
" WHERE nodeid = X'%s'",
node_id_to_hexstr(tmpctx, id)),
NULL, NULL, &errmsg);
if (err != SQLITE_OK)
plugin_err(cmd->plugin, "Could not delete from nodes: %s",
errmsg);
}
static bool extract_node_id(int gosstore_fd, size_t off, u16 type,
struct node_id *id)
{
/* BOLT #7:
* 1. type: 257 (`node_announcement`)
* 2. data:
* * [`signature`:`signature`]
* * [`u16`:`flen`]
* * [`flen*byte`:`features`]
* * [`u32`:`timestamp`]
* * [`point`:`node_id`]
*/
const size_t feature_len_off = 2 + 64;
be16 flen;
size_t node_id_off;
off += sizeof(struct gossip_hdr);
if (pread(gosstore_fd, &flen, sizeof(flen), off + feature_len_off)
!= sizeof(flen))
return false;
node_id_off = off + feature_len_off + 2 + be16_to_cpu(flen) + 4;
if (pread(gosstore_fd, id, sizeof(*id), node_id_off) != sizeof(*id))
return false;
return true;
}
static struct command_result *nodes_refresh(struct command *cmd,
const struct table_desc *td,
struct db_query *dbq)
{
struct out_req *req;
size_t msglen;
u16 type, flags;
if (gosstore_fd == -1) {
gosstore_fd = open("gossip_store", O_RDONLY);
if (gosstore_fd == -1)
plugin_err(cmd->plugin, "Could not open gossip_store: %s",
strerror(errno));
}
/* First time, set off to end and load from scratch */
if (gosstore_nodes_off == 0) {
gosstore_nodes_off = find_gossip_store_end(gosstore_fd, 1);
return default_refresh(cmd, td, dbq);
}
/* OK, try catching up! */
while (gossip_store_readhdr(gosstore_fd, gosstore_nodes_off,
&msglen, NULL, &flags, &type)) {
struct node_id id;
size_t off = gosstore_nodes_off;
gosstore_nodes_off += sizeof(struct gossip_hdr) + msglen;
if (flags & GOSSIP_STORE_DELETED_BIT)
continue;
if (type == WIRE_GOSSIP_STORE_ENDED) {
/* Force a reopen */
gosstore_nodes_off = gosstore_channels_off = 0;
close(gosstore_fd);
gosstore_fd = -1;
return nodes_refresh(cmd, td, dbq);
}
if (type == WIRE_NODE_ANNOUNCEMENT) {
/* This can fail if entry not fully written yet. */
if (!extract_node_id(gosstore_fd, off, type, &id)) {
gosstore_nodes_off = off;
break;
}
/* FIXME: sqlite 3.24.0 (2018-06-04) added UPSERT, but
* we don't require it. */
delete_node_from_db(cmd, &id);
req = jsonrpc_request_start(cmd->plugin, cmd, "listnodes",
listnodes_one_done,
forward_error,
dbq);
json_add_node_id(req->js, "id", &id);
return send_outreq(cmd->plugin, req);
}
/* FIXME: Add WIRE_GOSSIP_STORE_DELETE_NODE marker! */
}
return one_refresh_done(cmd, dbq);
}
static struct command_result *refresh_tables(struct command *cmd,
struct db_query *dbq)
{
const struct table_desc *td;
if (tal_count(dbq->tables) == 0)
return refresh_complete(cmd, dbq);
td = dbq->tables[0];
return td->refresh(cmd, dbq->tables[0], dbq);
}
static struct command_result *json_sql(struct command *cmd,
const char *buffer,
const jsmntok_t *params)
{
struct db_query *dbq = tal(cmd, struct db_query);
const char *query;
int err;
if (!param(cmd, buffer, params,
p_req("query", param_string, &query),
NULL))
return command_param_failed();
dbq->tables = tal_arr(dbq, struct table_desc *, 0);
dbq->authfail = NULL;
/* This both checks we're not altering, *and* tells us what
* tables to refresh. */
err = sqlite3_set_authorizer(db, sqlite_authorize, dbq);