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jsonprc: make json_get_params() fail the command, for better error reporting.

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We move it into jsonrpc where it belongs, and make it fail the command.
This means it can tell us exactly what was wrong.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-01-29 11:04:28 +10:30 committed by Christian Decker
parent 47577e5c4e
commit 91a22dc496
12 changed files with 138 additions and 154 deletions
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84
common/json.c
View File

@ -225,90 +225,6 @@ const jsmntok_t *json_delve(const char *buffer,
return tok;
}
bool json_get_params(const char *buffer, const jsmntok_t param[], ...)
{
va_list ap;
const char **names;
size_t num_names;
/* Uninitialized warnings on p and end */
const jsmntok_t **tokptr, *p = NULL, *end = NULL;
if (param->type == JSMN_ARRAY) {
if (param->size == 0)
p = NULL;
else
p = param + 1;
end = json_next(param);
} else if (param->type != JSMN_OBJECT)
return false;
num_names = 0;
names = tal_arr(NULL, const char *, num_names + 1);
va_start(ap, param);
while ((names[num_names] = va_arg(ap, const char *)) != NULL) {
tokptr = va_arg(ap, const jsmntok_t **);
bool compulsory = true;
if (names[num_names][0] == '?') {
names[num_names]++;
compulsory = false;
}
if (param->type == JSMN_ARRAY) {
*tokptr = p;
if (p) {
p = json_next(p);
if (p == end)
p = NULL;
}
} else {
*tokptr = json_get_member(buffer, param,
names[num_names]);
}
/* Convert 'null' to NULL */
if (*tokptr
&& (*tokptr)->type == JSMN_PRIMITIVE
&& buffer[(*tokptr)->start] == 'n') {
*tokptr = NULL;
}
if (compulsory && !*tokptr) {
va_end(ap);
tal_free(names);
return false;
}
num_names++;
tal_resize(&names, num_names + 1);
}
va_end(ap);
/* Now make sure there aren't any params which aren't valid */
if (param->type == JSMN_ARRAY) {
if (param->size > num_names) {
tal_free(names);
return false;
}
} else {
const jsmntok_t *t;
end = json_next(param);
/* Find each parameter among the valid names */
for (t = param + 1; t < end; t = json_next(t+1)) {
bool found = false;
for (size_t i = 0; i < num_names; i++) {
if (json_tok_streq(buffer, t, names[i]))
found = true;
}
if (!found) {
tal_free(names);
return false;
}
}
}
tal_free(names);
return true;
}
static bool strange_chars(const char *str, size_t len)
{
for (size_t i = 0; i < len; i++) {

9
common/json.h
View File

@ -46,15 +46,6 @@ bool json_tok_is_null(const char *buffer, const jsmntok_t *tok);
/* Returns next token with same parent. */
const jsmntok_t *json_next(const jsmntok_t *tok);
/* Get the parameters (by position or name). Followed by triples of
* of const char *name, const jsmntok_t **ret_ptr, then NULL.
*
* If name starts with '?' it is optional (and will be set to NULL
* if it's a literal 'null' or not present).
* Otherwise false is returned.
*/
bool json_get_params(const char *buffer, const jsmntok_t param[], ...);
/* Get top-level member. */
const jsmntok_t *json_get_member(const char *buffer, const jsmntok_t tok[],
const char *label);

6
lightningd/chaintopology.c
View File

@ -556,10 +556,9 @@ void json_dev_broadcast(struct command *cmd,
jsmntok_t *enabletok;
bool enable;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"enable", &enabletok,
NULL)) {
command_fail(cmd, "Need enable");
return;
}
@ -606,12 +605,11 @@ static void json_dev_setfees(struct command *cmd,
struct chain_topology *topo = cmd->ld->topology;
struct json_result *response;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"?immediate", &ratetok[FEERATE_IMMEDIATE],
"?normal", &ratetok[FEERATE_NORMAL],
"?slow", &ratetok[FEERATE_SLOW],
NULL)) {
command_fail(cmd, "Bad parameters");
return;
}

3
lightningd/dev_ping.c
View File

@ -45,12 +45,11 @@ static void json_dev_ping(struct command *cmd,
struct pubkey id;
struct subd *owner;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &idtok,
"len", &lentok,
"pongbytes", &pongbytestok,
NULL)) {
command_fail(cmd, "Need id, len and pongbytes");
return;
}

9
lightningd/gossip_control.c
View File

@ -235,10 +235,9 @@ static void json_listnodes(struct command *cmd, const char *buffer,
jsmntok_t *idtok = NULL;
struct pubkey *id = NULL;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"?id", &idtok,
NULL)) {
command_fail(cmd, "Invalid arguments");
return;
}
@ -302,13 +301,12 @@ static void json_getroute(struct command *cmd, const char *buffer, const jsmntok
double riskfactor;
struct lightningd *ld = cmd->ld;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &idtok,
"msatoshi", &msatoshitok,
"riskfactor", &riskfactortok,
"?cltv", &cltvtok,
NULL)) {
command_fail(cmd, "Need id, msatoshi and riskfactor");
return;
}
@ -396,10 +394,9 @@ static void json_listchannels(struct command *cmd, const char *buffer,
jsmntok_t *idtok;
struct short_channel_id *id = NULL;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"?short_channel_id", &idtok,
NULL)) {
command_fail(cmd, "Invalid arguments");
return;
}

18
lightningd/invoice.c
View File

@ -108,13 +108,12 @@ static void json_invoice(struct command *cmd,
char *b11enc;
u64 expiry = 3600;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"msatoshi", &msatoshi,
"label", &label,
"description", &desc,
"?expiry", &exp,
NULL)) {
command_fail(cmd, "Need {msatoshi}, {label} and {description}");
return;
}
@ -228,10 +227,9 @@ static void json_listinvoice_internal(struct command *cmd,
struct json_result *response = new_json_result(cmd);
struct wallet *wallet = cmd->ld->wallet;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"?label", &label,
NULL)) {
command_fail(cmd, "Invalid arguments");
return;
}
@ -284,11 +282,10 @@ static void json_delinvoice(struct command *cmd,
const char *label, *status, *actual_status;
struct wallet *wallet = cmd->ld->wallet;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"label", &labeltok,
"status", &statustok,
NULL)) {
command_fail(cmd, "Invalid arguments");
return;
}
@ -340,10 +337,9 @@ static void json_waitanyinvoice(struct command *cmd,
u64 pay_index;
struct wallet *wallet = cmd->ld->wallet;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"?lastpay_index", &pay_indextok,
NULL)) {
command_fail(cmd, "Invalid arguments");
return;
}
@ -389,8 +385,7 @@ static void json_waitinvoice(struct command *cmd,
jsmntok_t *labeltok;
const char *label = NULL;
if (!json_get_params(buffer, params, "label", &labeltok, NULL)) {
command_fail(cmd, "Missing {label}");
if (!json_get_params(cmd, buffer, params, "label", &labeltok, NULL)) {
return;
}
@ -427,11 +422,10 @@ static void json_decodepay(struct command *cmd,
struct json_result *response;
char *str, *desc, *fail;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"bolt11", &bolt11tok,
"?description", &desctok,
NULL)) {
command_fail(cmd, "Need bolt11 string");
return;
}

117
lightningd/jsonrpc.c
View File

@ -155,8 +155,7 @@ static void json_getlog(struct command *cmd,
struct log_book *lr = cmd->ld->log_book;
jsmntok_t *level;
if (!json_get_params(buffer, params, "?level", &level, NULL)) {
command_fail(cmd, "Invalid arguments");
if (!json_get_params(cmd, buffer, params, "?level", &level, NULL)) {
return;
}
@ -206,10 +205,9 @@ static void json_rhash(struct command *cmd,
jsmntok_t *secrettok;
struct sha256 secret;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"secret", &secrettok,
NULL)) {
command_fail(cmd, "Need secret");
return;
}
@ -298,8 +296,7 @@ static void json_help(struct command *cmd,
struct json_command **cmdlist = get_cmdlist();
jsmntok_t *cmdtok;
if (!json_get_params(buffer, params, "?command", &cmdtok, NULL)) {
command_fail(cmd, "Invalid arguments");
if (!json_get_params(cmd, buffer, params, "?command", &cmdtok, NULL)) {
return;
}
@ -626,13 +623,6 @@ static void parse_request(struct json_connection *jcon, const jsmntok_t tok[])
return;
}
if (params->type != JSMN_ARRAY && params->type != JSMN_OBJECT) {
command_fail_detailed(jcon->current,
JSONRPC2_INVALID_PARAMS, NULL,
"Expected array or object for params");
return;
}
db_begin_transaction(jcon->ld->wallet->db);
cmd->dispatch(jcon->current, jcon->buffer, params);
db_commit_transaction(jcon->ld->wallet->db);
@ -642,6 +632,107 @@ static void parse_request(struct json_connection *jcon, const jsmntok_t tok[])
assert(jcon->current->pending);
}
bool json_get_params(struct command *cmd,
const char *buffer, const jsmntok_t param[], ...)
{
va_list ap;
const char **names;
size_t num_names;
/* Uninitialized warnings on p and end */
const jsmntok_t **tokptr, *p = NULL, *end = NULL;
if (param->type == JSMN_ARRAY) {
if (param->size == 0)
p = NULL;
else
p = param + 1;
end = json_next(param);
} else if (param->type != JSMN_OBJECT) {
command_fail_detailed(cmd, JSONRPC2_INVALID_PARAMS, NULL,
"Expected array or object for params");
return false;
}
num_names = 0;
names = tal_arr(cmd, const char *, num_names + 1);
va_start(ap, param);
while ((names[num_names] = va_arg(ap, const char *)) != NULL) {
tokptr = va_arg(ap, const jsmntok_t **);
bool compulsory = true;
if (names[num_names][0] == '?') {
names[num_names]++;
compulsory = false;
}
if (param->type == JSMN_ARRAY) {
*tokptr = p;
if (p) {
p = json_next(p);
if (p == end)
p = NULL;
}
} else {
*tokptr = json_get_member(buffer, param,
names[num_names]);
}
/* Convert 'null' to NULL */
if (*tokptr
&& (*tokptr)->type == JSMN_PRIMITIVE
&& buffer[(*tokptr)->start] == 'n') {
*tokptr = NULL;
}
if (compulsory && !*tokptr) {
va_end(ap);
command_fail_detailed(cmd, JSONRPC2_INVALID_PARAMS, NULL,
"Missing '%s' parameter",
names[num_names]);
tal_free(names);
return false;
}
num_names++;
tal_resize(&names, num_names + 1);
}
va_end(ap);
/* Now make sure there aren't any params which aren't valid */
if (param->type == JSMN_ARRAY) {
if (param->size > num_names) {
tal_free(names);
command_fail_detailed(cmd, JSONRPC2_INVALID_PARAMS, NULL,
"Too many parameters:"
" got %u, expected %zu",
param->size, num_names);
return false;
}
} else {
const jsmntok_t *t;
end = json_next(param);
/* Find each parameter among the valid names */
for (t = param + 1; t < end; t = json_next(t+1)) {
bool found = false;
for (size_t i = 0; i < num_names; i++) {
if (json_tok_streq(buffer, t, names[i]))
found = true;
}
if (!found) {
tal_free(names);
command_fail_detailed(cmd,
JSONRPC2_INVALID_PARAMS,
NULL,
"Unknown parameter '%.*s'",
t->end - t->start,
buffer + t->start);
return false;
}
}
}
tal_free(names);
return true;
}
static struct io_plan *write_json(struct io_conn *conn,
struct json_connection *jcon)
{

10
lightningd/jsonrpc.h
View File

@ -56,6 +56,16 @@ struct json_command {
const char *verbose;
};
/* Get the parameters (by position or name). Followed by triples of
* of const char *name, const jsmntok_t **ret_ptr, then NULL.
*
* If name starts with '?' it is optional (and will be set to NULL
* if it's a literal 'null' or not present).
* Otherwise false is returned, and command_fail already called.
*/
bool json_get_params(struct command *cmd,
const char *buffer, const jsmntok_t param[], ...);
struct json_result *null_response(const tal_t *ctx);
void command_success(struct command *cmd, struct json_result *response);
void PRINTF_FMT(2, 3) command_fail(struct command *cmd, const char *fmt, ...);

3
lightningd/options.c
View File

@ -774,8 +774,7 @@ static void json_listconfigs(struct command *cmd,
jsmntok_t *configtok;
bool found = false;
if (!json_get_params(buffer, params, "?config", &configtok, NULL)) {
command_fail(cmd, "Invalid arguments");
if (!json_get_params(cmd, buffer, params, "?config", &configtok, NULL)) {
return;
}

9
lightningd/pay.c
View File

@ -432,11 +432,10 @@ static void json_sendpay(struct command *cmd,
struct sha256 rhash;
struct route_hop *route;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"route", &routetok,
"rhash", &rhashtok,
NULL)) {
command_fail(cmd, "Need route and rhash");
return;
}
@ -553,13 +552,12 @@ static void json_pay(struct command *cmd,
char *fail, *b11str, *desc;
u8 *req;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"bolt11", &bolt11tok,
"?msatoshi", &msatoshitok,
"?description", &desctok,
"?riskfactor", &riskfactortok,
NULL)) {
command_fail(cmd, "Need bolt11 string");
return;
}
@ -632,11 +630,10 @@ static void json_listpayments(struct command *cmd, const char *buffer,
jsmntok_t *bolt11tok, *rhashtok;
struct sha256 *rhash = NULL;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"?bolt11", &bolt11tok,
"?payment_hash", &rhashtok,
NULL)) {
command_fail(cmd, "Invalid parameters");
return;
}

21
lightningd/peer_control.c
View File

@ -742,12 +742,11 @@ static void json_connect(struct command *cmd,
struct wireaddr addr;
u8 *msg;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &idtok,
"?host", &hosttok,
"?port", &porttok,
NULL)) {
command_fail(cmd, "Need id to connect");
return;
}
@ -949,11 +948,10 @@ static void json_listpeers(struct command *cmd,
gpa->cmd = cmd;
gpa->specific_id = NULL;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"?id", &idtok,
"?level", &leveltok,
NULL)) {
command_fail(cmd, "Invalid arguments");
return;
}
@ -2673,11 +2671,10 @@ static void json_fund_channel(struct command *cmd,
struct funding_channel *fc = tal(cmd, struct funding_channel);
u8 *msg;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &peertok,
"satoshi", &satoshitok,
NULL)) {
command_fail(cmd, "Need id and satoshi");
return;
}
@ -2732,10 +2729,9 @@ static void json_close(struct command *cmd,
jsmntok_t *peertok;
struct peer *peer;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &peertok,
NULL)) {
command_fail(cmd, "Need id");
return;
}
@ -2849,10 +2845,9 @@ static void json_sign_last_tx(struct command *cmd,
struct json_result *response = new_json_result(cmd);
u8 *linear;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &peertok,
NULL)) {
command_fail(cmd, "Need id");
return;
}
@ -2891,10 +2886,9 @@ static void json_dev_fail(struct command *cmd,
jsmntok_t *peertok;
struct peer *peer;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &peertok,
NULL)) {
command_fail(cmd, "Need id");
return;
}
@ -2930,10 +2924,9 @@ static void json_dev_reenable_commit(struct command *cmd,
struct peer *peer;
u8 *msg;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"id", &peertok,
NULL)) {
command_fail(cmd, "Need id");
return;
}

3
wallet/walletrpc.c
View File

@ -199,11 +199,10 @@ static void json_withdraw(struct command *cmd,
struct bitcoin_tx *tx;
bool withdraw_all = false;
if (!json_get_params(buffer, params,
if (!json_get_params(cmd, buffer, params,
"destination", &desttok,
"satoshi", &sattok,
NULL)) {
command_fail(cmd, "Need destination and satoshi.");
return;
}