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gossipd: clean up getnodes handling.

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globalfeatures should not be accessed if we haven't received a
channel_update.  Treat it like the other fields which are only
initialized and marshalled/unmarshalled if the timestamp is positive.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-09-29 16:03:47 +09:30
parent df27fc55af
commit 915ffe35ed
3 changed files with 29 additions and 34 deletions
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41
gossipd/gossipd.c
View file

@ -1429,30 +1429,25 @@ static struct io_plan *getchannels_req(struct io_conn *conn, struct daemon *daem
return daemon_conn_read_next(conn, &daemon->master);
}
static void append_node(const struct gossip_getnodes_entry ***nodes,
const struct pubkey *nodeid,
const u8 *globalfeatures,
/* If non-NULL, contains more information */
/* We keep pointers into n, assuming it won't change! */
static void append_node(const struct gossip_getnodes_entry ***entries,
const struct node *n)
{
struct gossip_getnodes_entry *new;
struct gossip_getnodes_entry *e;
new = tal(*nodes, struct gossip_getnodes_entry);
new->nodeid = *nodeid;
new->globalfeatures = tal_dup_arr(*nodes, u8, globalfeatures,
tal_count(globalfeatures), 0);
if (!n || n->last_timestamp < 0) {
new->last_timestamp = -1;
new->addresses = NULL;
} else {
new->last_timestamp = n->last_timestamp;
new->addresses = n->addresses;
BUILD_ASSERT(ARRAY_SIZE(new->alias) == ARRAY_SIZE(n->alias));
BUILD_ASSERT(ARRAY_SIZE(new->color) == ARRAY_SIZE(n->rgb_color));
memcpy(new->alias, n->alias, ARRAY_SIZE(new->alias));
memcpy(new->color, n->rgb_color, ARRAY_SIZE(new->color));
}
*tal_arr_expand(nodes) = new;
*tal_arr_expand(entries) = e
= tal(*entries, struct gossip_getnodes_entry);
e->nodeid = n->id;
e->last_timestamp = n->last_timestamp;
if (e->last_timestamp < 0)
return;
e->globalfeatures = n->globalfeatures;
e->addresses = n->addresses;
BUILD_ASSERT(ARRAY_SIZE(e->alias) == ARRAY_SIZE(n->alias));
BUILD_ASSERT(ARRAY_SIZE(e->color) == ARRAY_SIZE(n->rgb_color));
memcpy(e->alias, n->alias, ARRAY_SIZE(e->alias));
memcpy(e->color, n->rgb_color, ARRAY_SIZE(e->color));
}
static struct io_plan *getnodes(struct io_conn *conn, struct daemon *daemon,
@ -1469,12 +1464,12 @@ static struct io_plan *getnodes(struct io_conn *conn, struct daemon *daemon,
if (id) {
n = get_node(daemon->rstate, id);
if (n)
append_node(&nodes, id, n->globalfeatures, n);
append_node(&nodes, n);
} else {
struct node_map_iter i;
n = node_map_first(daemon->rstate->nodes, &i);
while (n != NULL) {
append_node(&nodes, &n->id, n->globalfeatures, n);
append_node(&nodes, n);
n = node_map_next(daemon->rstate->nodes, &i);
}
}

20
lightningd/gossip_msg.c
View file

@ -14,15 +14,16 @@ struct gossip_getnodes_entry *fromwire_gossip_getnodes_entry(const tal_t *ctx,
entry = tal(ctx, struct gossip_getnodes_entry);
fromwire_pubkey(pptr, max, &entry->nodeid);
flen = fromwire_u16(pptr, max);
entry->globalfeatures = tal_arr(entry, u8, flen);
fromwire_u8_array(pptr, max, entry->globalfeatures, flen);
entry->last_timestamp = fromwire_u64(pptr, max);
if (entry->last_timestamp < 0) {
entry->addresses = NULL;
return entry;
}
flen = fromwire_u16(pptr, max);
entry->globalfeatures = tal_arr(entry, u8, flen);
fromwire_u8_array(pptr, max, entry->globalfeatures, flen);
numaddresses = fromwire_u8(pptr, max);
entry->addresses = tal_arr(entry, struct wireaddr, numaddresses);
@ -42,18 +43,17 @@ struct gossip_getnodes_entry *fromwire_gossip_getnodes_entry(const tal_t *ctx,
void towire_gossip_getnodes_entry(u8 **pptr,
const struct gossip_getnodes_entry *entry)
{
u8 i, numaddresses = tal_count(entry->addresses);
towire_pubkey(pptr, &entry->nodeid);
towire_u16(pptr, tal_count(entry->globalfeatures));
towire_u8_array(pptr, entry->globalfeatures,
tal_count(entry->globalfeatures));
towire_u64(pptr, entry->last_timestamp);
if (entry->last_timestamp < 0)
return;
towire_u8(pptr, numaddresses);
for (i=0; i<numaddresses; i++) {
towire_u16(pptr, tal_count(entry->globalfeatures));
towire_u8_array(pptr, entry->globalfeatures,
tal_count(entry->globalfeatures));
towire_u8(pptr, tal_count(entry->addresses));
for (size_t i = 0; i < tal_count(entry->addresses); i++) {
towire_wireaddr(pptr, &entry->addresses[i]);
}
towire(pptr, entry->alias, ARRAY_SIZE(entry->alias));

2
lightningd/gossip_msg.h
View file

@ -13,8 +13,8 @@ struct peer_features {
struct gossip_getnodes_entry {
struct pubkey nodeid;
u8 *globalfeatures;
s64 last_timestamp; /* -1 means never: following fields ignored */
u8 *globalfeatures;
struct wireaddr *addresses;
u8 alias[32];
u8 color[3];