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gossip: put 'routing_channel' in charge of 'node_connection'. 

This makes 'routing_channel' the primary object in the system; it can have
one or two 'node_connection's attached, and points to two nodes.

The nodes are freed when no more routing_channel refer to them.  The
routing_channel are freed when they contain no more 'node_connection'.
This fixes #1072 which I surmise was caused by a dangling
routing_channel after pruning.

Each node contains a single array of 'routing_channel's, not one for
each direction.  The 'routing_channel' itself orders nodes in key
order (conveniently the index is equal to the direction flag we use),
and 'node_connection' with source in the same order.

There are helpers to assist with common questions like "which
'node_connection' leads out of this node?".

There are now two ways to find a channel:
1. Direct scid lookup via rstate->channels map.
2. Node key lookup, followed by channel traversal.

Several FIXMEs are inserted for where we can now do things more optimally.

Fixes: #1072
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
ppa-0.6.1
Rusty Russell 7 years ago
committed by Christian Decker
parent
f8426600a6
commit
9b900138d0
6 changed files with 313 additions and 228 deletions
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  1. 71
      gossipd/gossip.c
  2. 382
      gossipd/routing.c
  3. 49
      gossipd/routing.h
  4. 8
      gossipd/test/run-bench-find_route.c
  5. 23
      gossipd/test/run-find_route-specific.c
  6. 8
      gossipd/test/run-find_route.c

71
gossipd/gossip.c
View File

@ -721,6 +721,8 @@ static void handle_get_update(struct peer *peer, const u8 *msg)
return; return;
} }
/* FIXME: Do direct scid lookup to get channel */
/* We want update than comes from our end. */ /* We want update than comes from our end. */
us = get_node(peer->daemon->rstate, &peer->daemon->id); us = get_node(peer->daemon->rstate, &peer->daemon->id);
if (!us) { if (!us) {
@ -732,11 +734,16 @@ static void handle_get_update(struct peer *peer, const u8 *msg)
goto reply; goto reply;
} }
for (i = 0; i < tal_count(us->out); i++) { for (i = 0; i < tal_count(us->channels); i++) {
if (!structeq(&us->out[i]->short_channel_id, &schanid)) struct node_connection *c;
if (!structeq(&us->channels[i]->scid, &schanid))
continue; continue;
update = us->out[i]->channel_update; c = connection_from(us, us->channels[i]);
if (!c)
update = NULL;
else
update = c->channel_update;
status_trace("peer %s schanid %s: %s update", status_trace("peer %s schanid %s: %s update",
type_to_string(trc, struct pubkey, &peer->id), type_to_string(trc, struct pubkey, &peer->id),
type_to_string(trc, struct short_channel_id, type_to_string(trc, struct short_channel_id,
@ -761,7 +768,6 @@ static void handle_local_add_channel(struct peer *peer, u8 *msg)
u32 fee_base_msat, fee_proportional_millionths; u32 fee_base_msat, fee_proportional_millionths;
u64 htlc_minimum_msat; u64 htlc_minimum_msat;
struct node_connection *c; struct node_connection *c;
struct routing_channel *chan;
if (!fromwire_gossip_local_add_channel( if (!fromwire_gossip_local_add_channel(
msg, &scid, &chain_hash, &remote_node_id, &flags, msg, &scid, &chain_hash, &remote_node_id, &flags,
@ -778,19 +784,19 @@ static void handle_local_add_channel(struct peer *peer, u8 *msg)
return; return;
} }
/* FIXME: use uintmap_get */
if (get_connection_by_scid(rstate, &scid, 0) || get_connection_by_scid(rstate, &scid, 1)) { if (get_connection_by_scid(rstate, &scid, 0) || get_connection_by_scid(rstate, &scid, 1)) {
status_trace("Attempted to local_add_channel a know channel"); status_trace("Attempted to local_add_channel a know channel");
return; return;
} }
chan = routing_channel_new(rstate, &scid); /* FIXME: unused */
chan->public = false; (void)flags;
uintmap_add(&rstate->channels, scid.u64, chan);
direction = get_channel_direction(&rstate->local_id, &remote_node_id); direction = get_channel_direction(&rstate->local_id, &remote_node_id);
c = half_add_connection(rstate, &rstate->local_id, &remote_node_id, &scid, direction); c = half_add_connection(rstate, &peer->daemon->id, &remote_node_id,
channel_add_connection(rstate, chan, c); &scid);
/* FIXME: Deduplicate with code in routing.c */
c->active = true; c->active = true;
c->last_timestamp = 0; c->last_timestamp = 0;
c->delay = cltv_expiry_delta; c->delay = cltv_expiry_delta;
@ -1079,6 +1085,9 @@ static void append_half_channel(struct gossip_getchannels_entry **entries,
struct gossip_getchannels_entry *e; struct gossip_getchannels_entry *e;
size_t n; size_t n;
if (!c)
return;
n = tal_count(*entries); n = tal_count(*entries);
tal_resize(entries, n+1); tal_resize(entries, n+1);
e = &(*entries)[n]; e = &(*entries)[n];
@ -1113,12 +1122,14 @@ static struct io_plan *getchannels_req(struct io_conn *conn, struct daemon *daem
entries = tal_arr(tmpctx, struct gossip_getchannels_entry, 0); entries = tal_arr(tmpctx, struct gossip_getchannels_entry, 0);
n = node_map_first(daemon->rstate->nodes, &i); n = node_map_first(daemon->rstate->nodes, &i);
while (n != NULL) { while (n != NULL) {
for (j=0; j<tal_count(n->out); j++){ for (j=0; j<tal_count(n->channels); j++){
if (scid && struct routing_channel *chan = n->channels[j];
!structeq(scid, &n->out[j]->short_channel_id)) { if (scid && !structeq(scid, &chan->scid)) {
continue; continue;
} }
append_half_channel(&entries, n->out[j]); /* FIXME: this avoids printing twice, but better
* to iterate over channels directly */
append_half_channel(&entries, connection_from(n, chan));
} }
n = node_map_next(daemon->rstate->nodes, &i); n = node_map_next(daemon->rstate->nodes, &i);
} }
@ -1329,10 +1340,12 @@ static void gossip_prune_network(struct daemon *daemon)
if (n) { if (n) {
/* Iterate through all outgoing connection and check whether /* Iterate through all outgoing connection and check whether
* it's time to re-announce */ * it's time to re-announce */
for (size_t i = 0; i < tal_count(n->out); i++) { for (size_t i = 0; i < tal_count(n->channels); i++) {
struct node_connection *nc = n->out[i]; struct node_connection *nc;
nc = connection_from(n, n->channels[i]);
if (!nc->channel_update) { if (!nc || !nc->channel_update) {
/* Connection is not public yet, so don't even /* Connection is not public yet, so don't even
* try to re-announce it */ * try to re-announce it */
continue; continue;
@ -1355,10 +1368,14 @@ static void gossip_prune_network(struct daemon *daemon)
/* Now iterate through all channels and see if it is still alive */ /* Now iterate through all channels and see if it is still alive */
for (n = node_map_first(daemon->rstate->nodes, &it); n; for (n = node_map_first(daemon->rstate->nodes, &it); n;
n = node_map_next(daemon->rstate->nodes, &it)) { n = node_map_next(daemon->rstate->nodes, &it)) {
for (size_t i = 0; i < tal_count(n->out); i++) { /* Since we cover all nodes, we would consider each channel twice
struct node_connection *nc = n->out[i]; * so we only look (arbitrarily) at outgoing */
for (size_t i = 0; i < tal_count(n->channels); i++) {
struct node_connection *nc;
nc = connection_from(n, n->channels[i]);
if (!nc->channel_update) { if (!nc || !nc->channel_update) {
/* Not even announced yet */ /* Not even announced yet */
continue; continue;
} }
@ -1374,18 +1391,8 @@ static void gossip_prune_network(struct daemon *daemon)
&nc->short_channel_id), &nc->short_channel_id),
get_channel_direction(&nc->src->id, &nc->dst->id), get_channel_direction(&nc->src->id, &nc->dst->id),
now - nc->last_timestamp); now - nc->last_timestamp);
/* Calls remove_conn_from_array internally, removes on /* This may free nodes, so do outside loop. */
* both src and dst side. */ tal_steal(pruned, nc);
tal_free(nc);
}
}
/* Finally remove all nodes that do not have any edges
* anymore. Reparent onto pruned, then free them all. */
for (n = node_map_first(daemon->rstate->nodes, &it); n;
n = node_map_next(daemon->rstate->nodes, &it)) {
if (tal_count(n->in) == 0 && tal_count(n->out) == 0) {
tal_steal(pruned, n);
} }
} }

382
gossipd/routing.c
View File

@ -131,10 +131,8 @@ static void destroy_node(struct node *node, struct routing_state *rstate)
node_map_del(rstate->nodes, node); node_map_del(rstate->nodes, node);
/* These remove themselves from the array. */ /* These remove themselves from the array. */
while (tal_count(node->in)) while (tal_count(node->channels))
tal_free(node->in[0]); tal_free(node->channels[0]);
while (tal_count(node->out))
tal_free(node->out[0]);
} }
struct node *get_node(struct routing_state *rstate, const struct pubkey *id) struct node *get_node(struct routing_state *rstate, const struct pubkey *id)
@ -151,8 +149,7 @@ static struct node *new_node(struct routing_state *rstate,
n = tal(rstate, struct node); n = tal(rstate, struct node);
n->id = *id; n->id = *id;
n->in = tal_arr(n, struct node_connection *, 0); n->channels = tal_arr(n, struct routing_channel *, 0);
n->out = tal_arr(n, struct node_connection *, 0);
n->alias = NULL; n->alias = NULL;
n->node_announcement = NULL; n->node_announcement = NULL;
n->announcement_idx = 0; n->announcement_idx = 0;
@ -164,50 +161,78 @@ static struct node *new_node(struct routing_state *rstate,
return n; return n;
} }
static bool remove_conn_from_array(struct node_connection ***conns, static bool remove_channel_from_array(struct routing_channel ***chans,
struct node_connection *nc) struct routing_channel *c)
{ {
size_t i, n; size_t i, n;
n = tal_count(*conns); n = tal_count(*chans);
for (i = 0; i < n; i++) { for (i = 0; i < n; i++) {
if ((*conns)[i] != nc) if ((*chans)[i] != c)
continue; continue;
n--; n--;
memmove(*conns + i, *conns + i + 1, sizeof(**conns) * (n - i)); memmove(*chans + i, *chans + i + 1, sizeof(**chans) * (n - i));
tal_resize(conns, n); tal_resize(chans, n);
return true; return true;
} }
return false; return false;
} }
static void destroy_connection(struct node_connection *nc) static void destroy_routing_channel(struct routing_channel *chan,
struct routing_state *rstate)
{ {
if (!remove_conn_from_array(&nc->dst->in, nc) if (!remove_channel_from_array(&chan->nodes[0]->channels, chan)
|| !remove_conn_from_array(&nc->src->out, nc)) || !remove_channel_from_array(&chan->nodes[1]->channels, chan))
/* FIXME! */ /* FIXME! */
abort(); abort();
uintmap_del(&rstate->channels, chan->scid.u64);
if (tal_count(chan->nodes[0]->channels) == 0)
tal_free(chan->nodes[0]);
if (tal_count(chan->nodes[1]->channels) == 0)
tal_free(chan->nodes[1]);
} }
static struct node_connection * get_connection(struct routing_state *rstate, /* Returns routing_channel connecting from and to: *idx set to refer
* to connection with src=from, dst=to */
static struct routing_channel *find_channel(struct routing_state *rstate,
const struct node *from,
const struct node *to,
int *idx)
{
int i, n;
*idx = pubkey_idx(&from->id, &to->id);
n = tal_count(to->channels);
for (i = 0; i < n; i++) {
if (to->channels[i]->nodes[*idx] == from)
return to->channels[i];
}
return NULL;
}
static struct node_connection *get_connection(struct routing_state *rstate,
const struct pubkey *from_id, const struct pubkey *from_id,
const struct pubkey *to_id) const struct pubkey *to_id)
{ {
int i, n; int idx;
struct node *from, *to; struct node *from, *to;
struct routing_channel *c;
from = get_node(rstate, from_id); from = get_node(rstate, from_id);
to = get_node(rstate, to_id); to = get_node(rstate, to_id);
if (!from || ! to) if (!from || ! to)
return NULL; return NULL;
n = tal_count(to->in); c = find_channel(rstate, from, to, &idx);
for (i = 0; i < n; i++) { if (!c)
if (to->in[i]->src == from) return NULL;
return to->in[i]; return c->connections[idx];
}
return NULL;
} }
/* FIXME: All users of this are confused. */
struct node_connection *get_connection_by_scid(const struct routing_state *rstate, struct node_connection *get_connection_by_scid(const struct routing_state *rstate,
const struct short_channel_id *scid, const struct short_channel_id *scid,
const u8 direction) const u8 direction)
@ -220,80 +245,121 @@ struct node_connection *get_connection_by_scid(const struct routing_state *rstat
return chan->connections[direction]; return chan->connections[direction];
} }
static struct node_connection * static struct routing_channel *new_routing_channel(struct routing_state *rstate,
get_or_make_connection(struct routing_state *rstate, const struct short_channel_id *scid,
const struct pubkey *from_id, struct node *n1,
const struct pubkey *to_id) struct node *n2)
{ {
size_t i, n; struct routing_channel *chan = tal(rstate, struct routing_channel);
struct node *from, *to; int n1idx = pubkey_idx(&n1->id, &n2->id);
struct node_connection *nc; size_t n;
from = get_node(rstate, from_id); chan->scid = *scid;
if (!from) chan->connections[0] = chan->connections[1] = NULL;
from = new_node(rstate, from_id); chan->nodes[n1idx] = n1;
to = get_node(rstate, to_id); chan->nodes[!n1idx] = n2;
if (!to) chan->txout_script = NULL;
to = new_node(rstate, to_id); chan->public = false;
memset(&chan->msg_indexes, 0, sizeof(chan->msg_indexes));
n = tal_count(to->in);
for (i = 0; i < n; i++) {
if (to->in[i]->src == from) {
status_trace("Updating existing route from %s to %s",
type_to_string(trc, struct pubkey,
&from->id),
type_to_string(trc, struct pubkey,
&to->id));
return to->in[i];
}
}
SUPERVERBOSE("Creating new route from %s to %s", n = tal_count(n2->channels);
type_to_string(trc, struct pubkey, &from->id), tal_resize(&n2->channels, n+1);
type_to_string(trc, struct pubkey, &to->id)); n2->channels[n] = chan;
n = tal_count(n1->channels);
tal_resize(&n1->channels, n+1);
n1->channels[n] = chan;
nc = tal(rstate, struct node_connection); uintmap_add(&rstate->channels, scid->u64, chan);
nc->src = from;
nc->dst = to;
nc->channel_announcement = NULL;
nc->channel_update = NULL;
nc->unroutable_until = 0;
/* Hook it into in/out arrays. */ tal_add_destructor2(chan, destroy_routing_channel, rstate);
i = tal_count(to->in); return chan;
tal_resize(&to->in, i+1);
to->in[i] = nc;
i = tal_count(from->out);
tal_resize(&from->out, i+1);
from->out[i] = nc;
tal_add_destructor(nc, destroy_connection);
return nc;
} }
static void delete_connection(const struct node_connection *connection) static void destroy_node_connection(struct node_connection *nc,
struct routing_channel *chan)
{ {
tal_free(connection); int dir = nc->flags & 0x1;
struct node_connection *c = chan->connections[dir];
assert(nc == c);
chan->connections[dir] = NULL;
/* Both sides deleted? Free channel */
if (!chan->connections[!dir])
tal_free(chan);
} }
struct node_connection *half_add_connection( static struct node_connection *new_node_connection(struct routing_state *rstate,
struct routing_state *rstate, struct routing_channel *chan,
const struct pubkey *from, struct node *from,
const struct pubkey *to, struct node *to,
const struct short_channel_id *schanid, int idx)
const u16 flags
)
{ {
struct node_connection *nc; struct node_connection *c;
nc = get_or_make_connection(rstate, from, to);
nc->short_channel_id = *schanid; /* We are going to put this in the right way? */
nc->active = false; assert(idx == pubkey_idx(&from->id, &to->id));
nc->flags = flags; assert(from == chan->nodes[idx]);
nc->last_timestamp = -1; assert(to == chan->nodes[!idx]);
return nc;
c = tal(rstate, struct node_connection);
c->src = from;
c->dst = to;
c->short_channel_id = chan->scid;
c->channel_announcement = NULL;
c->channel_update = NULL;
c->unroutable_until = 0;
c->active = false;
c->flags = idx;
c->last_timestamp = -1;
/* Hook it into in/out arrays. */
assert(!chan->connections[idx]);
chan->connections[idx] = c;
tal_add_destructor2(c, destroy_node_connection, chan);
return c;
} }
struct node_connection *half_add_connection(struct routing_state *rstate,
const struct pubkey *from_id,
const struct pubkey *to_id,
const struct short_channel_id *scid)
{
int idx;
struct node *from, *to;
struct routing_channel *chan;
struct node_connection *c;
from = get_node(rstate, from_id);
if (!from)
from = new_node(rstate, from_id);
to = get_node(rstate, to_id);
if (!to)
to = new_node(rstate, to_id);
/* FIXME: callers all have no channel? */
chan = find_channel(rstate, from, to, &idx);
if (!chan)
chan = new_routing_channel(rstate, scid, from, to);
c = chan->connections[idx];
if (!c) {
SUPERVERBOSE("Creating new route from %s to %s",
type_to_string(trc, struct pubkey, &from->id),
type_to_string(trc, struct pubkey, &to->id));
c = chan->connections[idx]
= new_node_connection(rstate, chan, from, to, idx);
} else {
status_trace("Updating existing route from %s to %s",
type_to_string(trc, struct pubkey, &from->id),
type_to_string(trc, struct pubkey, &to->id));
}
assert(c->src == from);
assert(c->dst == to);
return c;
}
/* Too big to reach, but don't overflow if added. */ /* Too big to reach, but don't overflow if added. */
#define INFINITE 0x3FFFFFFFFFFFFFFFULL #define INFINITE 0x3FFFFFFFFFFFFFFFULL
@ -333,10 +399,10 @@ static u64 risk_fee(u64 amount, u32 delay, double riskfactor)
/* We track totals, rather than costs. That's because the fee depends /* We track totals, rather than costs. That's because the fee depends
* on the current amount passing through. */ * on the current amount passing through. */
static void bfg_one_edge(struct node *node, size_t edgenum, double riskfactor, static void bfg_one_edge(struct node *node,
struct node_connection *c, double riskfactor,
double fuzz, const struct siphash_seed *base_seed) double fuzz, const struct siphash_seed *base_seed)
{ {
struct node_connection *c = node->in[edgenum];
size_t h; size_t h;
double fee_scale = 1.0; double fee_scale = 1.0;
@ -390,7 +456,7 @@ static void bfg_one_edge(struct node *node, size_t edgenum, double riskfactor,
/* Determine if the given node_connection is routable */ /* Determine if the given node_connection is routable */
static bool nc_is_routable(const struct node_connection *nc, time_t now) static bool nc_is_routable(const struct node_connection *nc, time_t now)
{ {
return nc->active && nc->unroutable_until < now; return nc && nc->active && nc->unroutable_until < now;
} }
/* riskfactor is already scaled to per-block amount */ /* riskfactor is already scaled to per-block amount */
@ -449,18 +515,21 @@ find_route(const tal_t *ctx, struct routing_state *rstate,
for (n = node_map_first(rstate->nodes, &it); for (n = node_map_first(rstate->nodes, &it);
n; n;
n = node_map_next(rstate->nodes, &it)) { n = node_map_next(rstate->nodes, &it)) {
size_t num_edges = tal_count(n->in); size_t num_edges = tal_count(n->channels);
for (i = 0; i < num_edges; i++) { for (i = 0; i < num_edges; i++) {
struct node_connection *c;
SUPERVERBOSE("Node %s edge %i/%zu", SUPERVERBOSE("Node %s edge %i/%zu",
type_to_string(trc, struct pubkey, type_to_string(trc, struct pubkey,
&n->id), &n->id),
i, num_edges); i, num_edges);
if (!nc_is_routable(n->in[i], now)) {
c = connection_to(n, n->channels[i]);
if (!nc_is_routable(c, now)) {
SUPERVERBOSE("...unroutable"); SUPERVERBOSE("...unroutable");
continue; continue;
} }
bfg_one_edge(n, i, riskfactor, bfg_one_edge(n, c,
fuzz, base_seed); riskfactor, fuzz, base_seed);
SUPERVERBOSE("...done"); SUPERVERBOSE("...done");
} }
} }
@ -539,7 +608,7 @@ add_channel_direction(struct routing_state *rstate, const struct pubkey *from,
c = c1; c = c1;
} else { } else {
/* We don't know this channel at all, create it */ /* We don't know this channel at all, create it */
c = half_add_connection(rstate, from, to, short_channel_id, direction); c = half_add_connection(rstate, from, to, short_channel_id);
} }
/* Remember the announcement so we can forward it to new peers */ /* Remember the announcement so we can forward it to new peers */
@ -585,41 +654,6 @@ static bool check_channel_announcement(
check_signed_hash(&hash, bitcoin2_sig, bitcoin2_key); check_signed_hash(&hash, bitcoin2_sig, bitcoin2_key);
} }
struct routing_channel *routing_channel_new(const tal_t *ctx,
struct short_channel_id *scid)
{
struct routing_channel *chan = tal(ctx, struct routing_channel);
chan->scid = *scid;
chan->connections[0] = chan->connections[1] = NULL;
chan->nodes[0] = chan->nodes[1] = NULL;
chan->txout_script = NULL;
chan->public = false;
memset(&chan->msg_indexes, 0, sizeof(chan->msg_indexes));
return chan;
}
static void destroy_node_connection(struct node_connection *nc,
struct routing_state *rstate)
{
struct routing_channel *chan = get_channel(rstate,&nc->short_channel_id);
struct node_connection *c = chan->connections[nc->flags & 0x1];
if (c == NULL)
return;
/* If we found a channel it should be the same */
assert(nc == c);
chan->connections[nc->flags & 0x1] = NULL;
}
void channel_add_connection(struct routing_state *rstate,
struct routing_channel *chan,
struct node_connection *nc)
{
int direction = get_channel_direction(&nc->src->id, &nc->dst->id);
assert(chan != NULL);
chan->connections[direction] = nc;
tal_add_destructor2(nc, destroy_node_connection, rstate);
}
static void add_pending_node_announcement(struct routing_state *rstate, struct pubkey *nodeid) static void add_pending_node_announcement(struct routing_state *rstate, struct pubkey *nodeid)
{ {
struct pending_node_announce *pna = tal(rstate, struct pending_node_announce); struct pending_node_announce *pna = tal(rstate, struct pending_node_announce);
@ -834,20 +868,6 @@ bool handle_pending_cannouncement(struct routing_state *rstate,
return false; return false;
} }
chan = get_channel(rstate, &pending->short_channel_id);
/* So you're new in town, ey? Let's find you a room in the Inn. */
if (!chan) {
chan = routing_channel_new(rstate, &pending->short_channel_id);
uintmap_add(&rstate->channels, pending->short_channel_id.u64, chan);
} else {
/* See handle_channel_announcement */
assert(!chan->public);
}
/* Channel is now public. */
chan->public = true;
/* Is this a new connection? It is if we don't know the /* Is this a new connection? It is if we don't know the
* channel yet, or do not have a matching announcement in the * channel yet, or do not have a matching announcement in the
* case of side-loaded channels*/ * case of side-loaded channels*/
@ -867,8 +887,9 @@ bool handle_pending_cannouncement(struct routing_state *rstate,
c1 = add_channel_direction(rstate, &pending->node_id_2, &pending->node_id_1, c1 = add_channel_direction(rstate, &pending->node_id_2, &pending->node_id_1,
&pending->short_channel_id, pending->announce); &pending->short_channel_id, pending->announce);
channel_add_connection(rstate, chan, c0); /* Channel is now public. */
channel_add_connection(rstate, chan, c1); chan = get_channel(rstate, scid);
chan->public = true;
if (forward) { if (forward) {
if (replace_broadcast(rstate->broadcasts, if (replace_broadcast(rstate->broadcasts,
@ -1234,30 +1255,20 @@ struct route_hop *get_route(tal_t *ctx, struct routing_state *rstate,
return hops; return hops;
} }
/* Get the struct node_connection matching the short_channel_id,
* which must be an out connection of the given node. */
static struct node_connection *
get_out_node_connection_of(const struct node *node,
const struct short_channel_id *short_channel_id)
{
int i;
for (i = 0; i < tal_count(node->out); ++i) {
if (structeq(&node->out[i]->short_channel_id, short_channel_id))
return node->out[i];
}
return NULL;
}
/** /**
* routing_failure_on_nc - Handle routing failure on a specific * routing_failure_channel_out - Handle routing failure on a specific channel
* node_connection.
*/ */
static void routing_failure_on_nc(enum onion_type failcode, static void routing_failure_channel_out(struct node *node,
struct node_connection *nc, enum onion_type failcode,
time_t now) struct routing_channel *chan,
time_t now)
{ {
struct node_connection *nc;
nc = connection_from(node, chan);
if (!nc)
return;
/* BOLT #4: /* BOLT #4:
* *
* - if the PERM bit is NOT set: * - if the PERM bit is NOT set:
@ -1267,7 +1278,7 @@ static void routing_failure_on_nc(enum onion_type failcode,
/* Prevent it for 20 seconds. */ /* Prevent it for 20 seconds. */
nc->unroutable_until = now + 20; nc->unroutable_until = now + 20;
else else
delete_connection(nc); tal_free(nc);
} }
void routing_failure(struct routing_state *rstate, void routing_failure(struct routing_state *rstate,
@ -1278,7 +1289,6 @@ void routing_failure(struct routing_state *rstate,
{ {
const tal_t *tmpctx = tal_tmpctx(rstate); const tal_t *tmpctx = tal_tmpctx(rstate);
struct node *node; struct node *node;
struct node_connection *nc;
int i; int i;
enum wire_type t; enum wire_type t;
time_t now = time_now().ts.tv_sec; time_t now = time_now().ts.tv_sec;
@ -1308,23 +1318,35 @@ void routing_failure(struct routing_state *rstate,
* *
*/ */
if (failcode & NODE) { if (failcode & NODE) {
for (i = 0; i < tal_count(node->in); ++i) /* If permanent, we forget entire node and all its channels.
routing_failure_on_nc(failcode, node->in[i], now); * If we did this in a loop, we might use-after-free. */
for (i = 0; i < tal_count(node->out); ++i) if (failcode & PERM) {
routing_failure_on_nc(failcode, node->out[i], now); tal_free(node);
} else {
for (i = 0; i < tal_count(node->channels); ++i)
routing_failure_channel_out(node, failcode,
node->channels[i],
now);
}
} else { } else {
nc = get_out_node_connection_of(node, scid); struct routing_channel *chan = get_channel(rstate, scid);
if (nc)
routing_failure_on_nc(failcode, nc, now); if (!chan)
status_unusual("routing_failure: "
"Channel %s unknown",
type_to_string(tmpctx,
struct short_channel_id,
scid));
else if (chan->nodes[0] != node && chan->nodes[1] != node)
status_unusual("routing_failure: "
"Channel %s does not connect to %s",
type_to_string(tmpctx,
struct short_channel_id,
scid),
type_to_string(tmpctx, struct pubkey,
erring_node_pubkey));
else else
status_trace("UNUSUAL routing_failure: " routing_failure_channel_out(node, failcode, chan, now);
"Channel %s not an out channel "
"of node %s",
type_to_string(tmpctx,
struct short_channel_id,
scid),
type_to_string(tmpctx, struct pubkey,
erring_node_pubkey));
} }
/* Update the channel if UPDATE failcode. Do /* Update the channel if UPDATE failcode. Do

49
gossipd/routing.h
View File

@ -13,6 +13,7 @@
#define ROUTING_FLAGS_DISABLED 2 #define ROUTING_FLAGS_DISABLED 2
struct node_connection { struct node_connection {
/* FIXME: Remove */
struct node *src, *dst; struct node *src, *dst;
/* millisatoshi. */ /* millisatoshi. */
u32 base_fee; u32 base_fee;
@ -31,6 +32,7 @@ struct node_connection {
u32 htlc_minimum_msat; u32 htlc_minimum_msat;
/* The channel ID, as determined by the anchor transaction */ /* The channel ID, as determined by the anchor transaction */
/* FIXME: Remove */
struct short_channel_id short_channel_id; struct short_channel_id short_channel_id;
/* Flags as specified by the `channel_update`s, among other /* Flags as specified by the `channel_update`s, among other
@ -38,6 +40,7 @@ struct node_connection {
u16 flags; u16 flags;
/* Cached `channel_announcement` and `channel_update` we might forward to new peers*/ /* Cached `channel_announcement` and `channel_update` we might forward to new peers*/
/* FIXME: Remove */
u8 *channel_announcement; u8 *channel_announcement;
u8 *channel_update; u8 *channel_update;
@ -55,8 +58,8 @@ struct node {
/* IP/Hostname and port of this node (may be NULL) */ /* IP/Hostname and port of this node (may be NULL) */
struct wireaddr *addresses; struct wireaddr *addresses;
/* Routes connecting to us, from us. */ /* Channels connecting us to other nodes */
struct node_connection **in, **out; struct routing_channel **channels;
/* Temporary data for routefinding. */ /* Temporary data for routefinding. */
struct { struct {
@ -93,15 +96,48 @@ struct routing_channel {
struct short_channel_id scid; struct short_channel_id scid;
u8 *txout_script; u8 *txout_script;
/* One of these might be NULL.
* connections[0]->src == nodes[0] connections[0]->dst == nodes[1]
* connections[1]->src == nodes[1] connections[1]->dst == nodes[0]
*/
struct node_connection *connections[2]; struct node_connection *connections[2];
/* nodes[0].id < nodes[1].id */
struct node *nodes[2]; struct node *nodes[2];
/* FIXME: Move msg_index[MSG_INDEX_CUPDATE*] into connections[] */
u64 msg_indexes[3]; u64 msg_indexes[3];
/* Is this a public channel, or was it only added locally? */ /* Is this a public channel, or was it only added locally? */
bool public; bool public;
}; };
/* If the two nodes[] are id1 and id2, which index would id1 be? */
static inline int pubkey_idx(const struct pubkey *id1, const struct pubkey *id2)
{
return pubkey_cmp(id1, id2) > 0;
}
/* FIXME: We could avoid these by having two channels arrays */
static inline struct node_connection *connection_from(const struct node *n,
struct routing_channel *chan)
{
int idx = (chan->nodes[1] == n);
assert(!chan->connections[idx] || chan->connections[idx]->src == n);
assert(!chan->connections[!idx] || chan->connections[!idx]->dst == n);
return chan->connections[idx];
}
static inline struct node_connection *connection_to(const struct node *n,
struct routing_channel *chan)
{
int idx = (chan->nodes[1] == n);
assert(!chan->connections[idx] || chan->connections[idx]->src == n);
assert(!chan->connections[!idx] || chan->connections[!idx]->dst == n);
return chan->connections[!idx];
}
struct routing_state { struct routing_state {
/* All known nodes. */ /* All known nodes. */
struct node_map *nodes; struct node_map *nodes;
@ -148,8 +184,7 @@ struct routing_state *new_routing_state(const tal_t *ctx,
struct node_connection *half_add_connection(struct routing_state *rstate, struct node_connection *half_add_connection(struct routing_state *rstate,
const struct pubkey *from, const struct pubkey *from,
const struct pubkey *to, const struct pubkey *to,
const struct short_channel_id *schanid, const struct short_channel_id *scid);
const u16 flags);
/* Given a short_channel_id, retrieve the matching connection, or NULL if it is /* Given a short_channel_id, retrieve the matching connection, or NULL if it is
* unknown. */ * unknown. */
@ -203,15 +238,13 @@ void routing_failure(struct routing_state *rstate,
void mark_channel_unroutable(struct routing_state *rstate, void mark_channel_unroutable(struct routing_state *rstate,
const struct short_channel_id *channel); const struct short_channel_id *channel);
/* routing_channel constructor */
struct routing_channel *routing_channel_new(const tal_t *ctx,
struct short_channel_id *scid);
/* Add the connection to the channel */ /* Add the connection to the channel */
void channel_add_connection(struct routing_state *rstate, void channel_add_connection(struct routing_state *rstate,
struct routing_channel *chan, struct routing_channel *chan,
struct node_connection *nc); struct node_connection *nc);
void delete_connection(struct routing_channel *chan, int idx);
/* Utility function that, given a source and a destination, gives us /* Utility function that, given a source and a destination, gives us
* the direction bit the matching channel should get */ * the direction bit the matching channel should get */
#define get_channel_direction(from, to) (pubkey_cmp(from, to) > 0) #define get_channel_direction(from, to) (pubkey_cmp(from, to) > 0)

8
gossipd/test/run-bench-find_route.c
View File

@ -108,12 +108,16 @@ static struct node_connection *add_connection(struct routing_state *rstate,
u32 base_fee, s32 proportional_fee, u32 base_fee, s32 proportional_fee,
u32 delay) u32 delay)
{ {
struct node_connection *c = get_or_make_connection(rstate, from, to); struct short_channel_id scid;
struct node_connection *c;
memset(&scid, 0, sizeof(scid));
c = half_add_connection(rstate, from, to, &scid);
c->base_fee = base_fee; c->base_fee = base_fee;
c->proportional_fee = proportional_fee; c->proportional_fee = proportional_fee;
c->delay = delay; c->delay = delay;
c->active = true; c->active = true;
memset(&c->short_channel_id, 0, sizeof(c->short_channel_id)); c->short_channel_id = scid;
c->flags = get_channel_direction(from, to); c->flags = get_channel_direction(from, to);
return c; return c;
} }

23
gossipd/test/run-find_route-specific.c
View File

@ -65,6 +65,21 @@ void towire_u16(u8 **pptr UNNEEDED, u16 v UNNEEDED)
const void *trc; const void *trc;
bool short_channel_id_from_str(const char *str, size_t strlen,
struct short_channel_id *dst);
static struct node_connection *
get_or_make_connection(struct routing_state *rstate,
const struct pubkey *from_id,
const struct pubkey *to_id,
const char *shortid)
{
struct short_channel_id scid;
if (!short_channel_id_from_str(shortid, strlen(shortid), &scid))
abort();
return half_add_connection(rstate, from_id, to_id, &scid);
}
int main(void) int main(void)
{ {
static const struct bitcoin_blkid zerohash; static const struct bitcoin_blkid zerohash;
@ -92,7 +107,7 @@ int main(void)
rstate = new_routing_state(ctx, &zerohash, &a); rstate = new_routing_state(ctx, &zerohash, &a);
/* [{'active': True, 'short_id': '6990:2:1/1', 'fee_per_kw': 10, 'delay': 5, 'flags': 1, 'destination': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'source': '02ea622d5c8d6143f15ed3ce1d501dd0d3d09d3b1c83a44d0034949f8a9ab60f06', 'last_update': 1504064344}, */ /* [{'active': True, 'short_id': '6990:2:1/1', 'fee_per_kw': 10, 'delay': 5, 'flags': 1, 'destination': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'source': '02ea622d5c8d6143f15ed3ce1d501dd0d3d09d3b1c83a44d0034949f8a9ab60f06', 'last_update': 1504064344}, */
nc = get_or_make_connection(rstate, &c, &b); nc = get_or_make_connection(rstate, &c, &b, "6990:2:1");
nc->active = true; nc->active = true;
nc->base_fee = 0; nc->base_fee = 0;
nc->proportional_fee = 10; nc->proportional_fee = 10;
@ -101,7 +116,7 @@ int main(void)
nc->last_timestamp = 1504064344; nc->last_timestamp = 1504064344;
/* {'active': True, 'short_id': '6989:2:1/0', 'fee_per_kw': 10, 'delay': 5, 'flags': 0, 'destination': '03c173897878996287a8100469f954dd820fcd8941daed91c327f168f3329be0bf', 'source': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'last_update': 1504064344}, */ /* {'active': True, 'short_id': '6989:2:1/0', 'fee_per_kw': 10, 'delay': 5, 'flags': 0, 'destination': '03c173897878996287a8100469f954dd820fcd8941daed91c327f168f3329be0bf', 'source': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'last_update': 1504064344}, */
nc = get_or_make_connection(rstate, &b, &a); nc = get_or_make_connection(rstate, &b, &a, "6989:2:1");
nc->active = true; nc->active = true;
nc->base_fee = 0; nc->base_fee = 0;
nc->proportional_fee = 10; nc->proportional_fee = 10;
@ -110,7 +125,7 @@ int main(void)
nc->last_timestamp = 1504064344; nc->last_timestamp = 1504064344;
/* {'active': True, 'short_id': '6990:2:1/0', 'fee_per_kw': 10, 'delay': 5, 'flags': 0, 'destination': '02ea622d5c8d6143f15ed3ce1d501dd0d3d09d3b1c83a44d0034949f8a9ab60f06', 'source': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'last_update': 1504064344}, */ /* {'active': True, 'short_id': '6990:2:1/0', 'fee_per_kw': 10, 'delay': 5, 'flags': 0, 'destination': '02ea622d5c8d6143f15ed3ce1d501dd0d3d09d3b1c83a44d0034949f8a9ab60f06', 'source': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'last_update': 1504064344}, */
nc = get_or_make_connection(rstate, &b, &c); nc = get_or_make_connection(rstate, &b, &c, "6990:2:1");
nc->active = true; nc->active = true;
nc->base_fee = 0; nc->base_fee = 0;
nc->proportional_fee = 10; nc->proportional_fee = 10;
@ -119,7 +134,7 @@ int main(void)
nc->last_timestamp = 1504064344; nc->last_timestamp = 1504064344;
/* {'active': True, 'short_id': '6989:2:1/1', 'fee_per_kw': 10, 'delay': 5, 'flags': 1, 'destination': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'source': '03c173897878996287a8100469f954dd820fcd8941daed91c327f168f3329be0bf', 'last_update': 1504064344}]} */ /* {'active': True, 'short_id': '6989:2:1/1', 'fee_per_kw': 10, 'delay': 5, 'flags': 1, 'destination': '0230ad0e74ea03976b28fda587bb75bdd357a1938af4424156a18265167f5e40ae', 'source': '03c173897878996287a8100469f954dd820fcd8941daed91c327f168f3329be0bf', 'last_update': 1504064344}]} */
nc = get_or_make_connection(rstate, &a, &b); nc = get_or_make_connection(rstate, &a, &b, "6989:2:1");
nc->active = true; nc->active = true;
nc->base_fee = 0; nc->base_fee = 0;
nc->proportional_fee = 10; nc->proportional_fee = 10;

8
gossipd/test/run-find_route.c
View File

@ -70,12 +70,16 @@ static struct node_connection *add_connection(struct routing_state *rstate,
u32 base_fee, s32 proportional_fee, u32 base_fee, s32 proportional_fee,
u32 delay) u32 delay)
{ {
struct node_connection *c = get_or_make_connection(rstate, from, to); struct short_channel_id scid;
struct node_connection *c;
memset(&scid, 0, sizeof(scid));
c = half_add_connection(rstate, from, to, &scid);
c->base_fee = base_fee; c->base_fee = base_fee;
c->proportional_fee = proportional_fee; c->proportional_fee = proportional_fee;
c->delay = delay; c->delay = delay;
c->active = true; c->active = true;
memset(&c->short_channel_id, 0, sizeof(c->short_channel_id)); c->short_channel_id = scid;
c->flags = get_channel_direction(from, to); c->flags = get_channel_direction(from, to);
return c; return c;
} }

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