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#include <bitcoin/block.h>
#include <bitcoin/pubkey.h>
#include <bitcoin/short_channel_id.h>
#include <ccan/crypto/siphash24/siphash24.h>
#include <ccan/htable/htable_type.h>
#include <ccan/mem/mem.h>
#include <common/pseudorand.h>
#include <common/status.h>
#include <common/type_to_string.h>
#include <gossipd/broadcast.h>
#include <wire/gen_peer_wire.h>
struct queued_message {
/* Broadcast index. */
u64 index;
/* Timestamp, for filtering. */
u32 timestamp;
/* Serialized payload */
const u8 *payload;
};
struct broadcast_state *new_broadcast_state(tal_t *ctx)
{
struct broadcast_state *bstate = tal(ctx, struct broadcast_state);
uintmap_init(&bstate->broadcasts);
/* Skip 0 because we initialize peers with 0 */
bstate->next_index = 1;
return bstate;
}
void broadcast_del(struct broadcast_state *bstate, u64 index, const u8 *payload)
{
const struct queued_message *q = uintmap_del(&bstate->broadcasts, index);
assert(q->payload == payload);
broadcast_state_check(bstate, "broadcast_del");
}
static void destroy_queued_message(struct queued_message *msg,
struct broadcast_state *bstate)
{
broadcast_del(bstate, msg->index, msg->payload);
}
static struct queued_message *new_queued_message(const tal_t *ctx,
struct broadcast_state *bstate,
const u8 *payload,
u32 timestamp,
u64 index)
{
struct queued_message *msg = tal(ctx, struct queued_message);
assert(payload);
msg->payload = payload;
msg->index = index;
msg->timestamp = timestamp;
uintmap_add(&bstate->broadcasts, index, msg);
tal_add_destructor2(msg, destroy_queued_message, bstate);
return msg;
}
u64 insert_broadcast(struct broadcast_state *bstate,
const u8 *payload, u32 timestamp)
{
/* Free payload, free index. */
new_queued_message(payload, bstate, payload, timestamp,
bstate->next_index);
broadcast_state_check(bstate, "insert_broadcast");
return bstate->next_index++;
}
const u8 *next_broadcast(struct broadcast_state *bstate,
u32 timestamp_min, u32 timestamp_max,
u64 *last_index)
{
struct queued_message *m;
while ((m = uintmap_after(&bstate->broadcasts, last_index)) != NULL) {
if (m->timestamp >= timestamp_min
&& m->timestamp <= timestamp_max)
return m->payload;
}
return NULL;
}
static const struct pubkey *
pubkey_keyof(const struct pubkey *pk)
{
return pk;
}
static size_t pubkey_hash(const struct pubkey *id)
{
return siphash24(siphash_seed(), id, sizeof(*id));
}
HTABLE_DEFINE_TYPE(struct pubkey,
pubkey_keyof,
pubkey_hash,
pubkey_eq,
pubkey_set);
static void *corrupt(const char *abortstr, const char *problem,
const struct short_channel_id *scid,
const struct pubkey *node_id)
{
status_broken("Gossip corrupt %s %s: %s",
problem, abortstr ? abortstr : "",
scid ? type_to_string(tmpctx,
struct short_channel_id,
scid)
: type_to_string(tmpctx, struct pubkey, node_id));
if (abortstr)
abort();
return NULL;
}
struct broadcast_state *broadcast_state_check(struct broadcast_state *b,
const char *abortstr)
{
secp256k1_ecdsa_signature sig;
const u8 *msg;
u8 *features, *addresses, color[3], alias[32];
struct bitcoin_blkid chain_hash;
struct short_channel_id scid;
struct pubkey node_id_1, node_id_2, bitcoin_key;
u32 timestamp, fees;
u16 flags, expiry;
u64 index = 0, htlc_minimum_msat;
struct pubkey_set pubkeys;
/* We actually only need a set, not a map. */
UINTMAP(u64 *) channels;
pubkey_set_init(&pubkeys);
uintmap_init(&channels);
while ((msg = next_broadcast(b, 0, UINT32_MAX, &index)) != NULL) {
if (fromwire_channel_announcement(tmpctx, msg, &sig, &sig, &sig,
&sig, &features, &chain_hash,
&scid, &node_id_1, &node_id_2,
&bitcoin_key, &bitcoin_key)) {
if (!uintmap_add(&channels, scid.u64, &index))
return corrupt(abortstr, "announced twice",
&scid, NULL);
pubkey_set_add(&pubkeys, &node_id_1);
pubkey_set_add(&pubkeys, &node_id_2);
} else if (fromwire_channel_update(msg, &sig, &chain_hash,
&scid, &timestamp, &flags,
&expiry, &htlc_minimum_msat,
&fees, &fees)) {
if (!uintmap_get(&channels, scid.u64))
return corrupt(abortstr,
"updated before announce",
&scid, NULL);
} else if (fromwire_node_announcement(tmpctx, msg,
&sig, &features,
&timestamp,
&node_id_1, color, alias,
&addresses))
if (!uintmap_get(&channels, scid.u64))
return corrupt(abortstr,
"node announced before channel",
NULL, &node_id_1);
}
pubkey_set_clear(&pubkeys);
uintmap_clear(&channels);
return b;
}