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More flexible address wildcards, only add wildcard if nothing else.

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1. Add special option where an empty host means 'wildcard for IPv4 and/or IPv6'
   which means ':1234' can be used to set only the portnum.
2. Only add this protocol wildcard if --autolisten=1 (default)
   and no other addresses specified.
3. Pass it down to gossipd, so it can handle errors correctly: in most cases,
   it's fatal not to be able to bind to a port, but for this case, it's OK
   if we can only bind to one of IPv4/v6 (fatal iff neither).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-05-07 13:59:22 +09:30 committed by Christian Decker
parent 73cd009a4c
commit 52917ff6c9
10 changed files with 108 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
common/wireaddr.c
View File

@ -63,6 +63,9 @@ void towire_wireaddr_internal(u8 **pptr, const struct wireaddr_internal *addr)
towire_u8_array(pptr, (const u8 *)addr->u.sockname,
sizeof(addr->u.sockname));
return;
case ADDR_INTERNAL_ALLPROTO:
towire_u16(pptr, addr->u.port);
return;
case ADDR_INTERNAL_WIREADDR:
towire_wireaddr(pptr, &addr->u.wireaddr);
return;
@ -82,6 +85,9 @@ bool fromwire_wireaddr_internal(const u8 **cursor, size_t *max,
if (!memchr(addr->u.sockname, 0, sizeof(addr->u.sockname)))
fromwire_fail(cursor, max);
return *cursor != NULL;
case ADDR_INTERNAL_ALLPROTO:
addr->u.port = fromwire_u16(cursor, max);
return *cursor != NULL;
case ADDR_INTERNAL_WIREADDR:
return fromwire_wireaddr(cursor, max, &addr->u.wireaddr);
}
@ -164,6 +170,8 @@ char *fmt_wireaddr_internal(const tal_t *ctx,
switch (a->itype) {
case ADDR_INTERNAL_SOCKNAME:
return tal_fmt(ctx, "%s", a->u.sockname);
case ADDR_INTERNAL_ALLPROTO:
return tal_fmt(ctx, ":%u", a->u.port);
case ADDR_INTERNAL_WIREADDR:
return fmt_wireaddr(ctx, &a->u.wireaddr);
}
@ -297,8 +305,12 @@ finish:
return res;
}
bool parse_wireaddr_internal(const char *arg, struct wireaddr_internal *addr, u16 port, const char **err_msg)
bool parse_wireaddr_internal(const char *arg, struct wireaddr_internal *addr,
u16 port, bool wildcard_ok, const char **err_msg)
{
u16 wildport;
char *ip;
/* Addresses starting with '/' are local socket paths */
if (arg[0] == '/') {
addr->itype = ADDR_INTERNAL_SOCKNAME;
@ -313,6 +325,16 @@ bool parse_wireaddr_internal(const char *arg, struct wireaddr_internal *addr, u1
return true;
}
/* An empty string means IPv4 and IPv6 (which under Linux by default
* means just IPv6, and IPv4 gets autobound). */
if (wildcard_ok
&& separate_address_and_port(tmpctx, arg, &ip, &wildport)
&& streq(ip, "")) {
addr->itype = ADDR_INTERNAL_ALLPROTO;
addr->u.port = wildport;
return true;
}
addr->itype = ADDR_INTERNAL_WIREADDR;
return parse_wireaddr(arg, &addr->u.wireaddr, port, err_msg);
}

7
common/wireaddr.h
View File

@ -77,6 +77,7 @@ bool wireaddr_to_ipv6(const struct wireaddr *addr, struct sockaddr_in6 *s6);
enum wireaddr_internal_type {
ADDR_INTERNAL_SOCKNAME,
ADDR_INTERNAL_ALLPROTO,
ADDR_INTERNAL_WIREADDR,
};
@ -84,11 +85,15 @@ enum wireaddr_internal_type {
struct wireaddr_internal {
enum wireaddr_internal_type itype;
union {
/* ADDR_INTERNAL_SOCKNAME */
struct wireaddr wireaddr;
/* ADDR_INTERNAL_ALLPROTO */
u16 port;
/* ADDR_INTERNAL_WIREADDR */
char sockname[108];
} u;
};
bool parse_wireaddr_internal(const char *arg, struct wireaddr_internal *addr, u16 port, const char **err_msg);
bool parse_wireaddr_internal(const char *arg, struct wireaddr_internal *addr, u16 port, bool wildcard_ok, const char **err_msg);
void towire_wireaddr_internal(u8 **pptr,
const struct wireaddr_internal *addr);

76
gossipd/gossip.c
View File

@ -570,7 +570,8 @@ static u8 *create_node_announcement(const tal_t *ctx, struct daemon *daemon,
if (!(daemon->listen_announce[i] & ADDR_ANNOUNCE))
continue;
/* You can only announce wiretypes! */
assert(daemon->wireaddrs[i].itype == ADDR_INTERNAL_WIREADDR);
if (daemon->wireaddrs[i].itype != ADDR_INTERNAL_WIREADDR)
continue;
towire_wireaddr(&addresses,
&daemon->wireaddrs[i].u.wireaddr);
}
@ -1389,10 +1390,14 @@ out:
return daemon_conn_read_next(conn, &daemon->master);
}
static int make_listen_fd(int domain, void *addr, socklen_t len, bool reportfail)
static int make_listen_fd(int domain, void *addr, socklen_t len, bool mayfail)
{
int fd = socket(domain, SOCK_STREAM, 0);
if (fd < 0) {
if (!mayfail)
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Failed to create %u socket: %s",
domain, strerror(errno));
status_trace("Failed to create %u socket: %s",
domain, strerror(errno));
return -1;
@ -1407,17 +1412,20 @@ static int make_listen_fd(int domain, void *addr, socklen_t len, bool reportfail
strerror(errno));
if (bind(fd, addr, len) != 0) {
if (reportfail)
status_broken("Failed to bind on %u socket: %s",
if (!mayfail)
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Failed to bind on %u socket: %s",
domain, strerror(errno));
status_trace("Failed to create %u socket: %s",
domain, strerror(errno));
goto fail;
}
}
if (listen(fd, 5) != 0) {
status_broken("Failed to listen on %u socket: %s",
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Failed to listen on %u socket: %s",
domain, strerror(errno));
goto fail;
}
return fd;
@ -1561,10 +1569,10 @@ static struct io_plan *connection_in(struct io_conn *conn, struct daemon *daemon
init_new_peer, daemon);
}
/* Returns true if it was an IPv6 wildcard (as inserted by guess_addresses) */
/* Return true if it created socket successfully. */
static bool handle_wireaddr_listen(struct daemon *daemon,
const struct wireaddr *wireaddr,
bool had_ipv6_wildcard)
bool mayfail)
{
int fd;
struct sockaddr_in addr;
@ -1574,27 +1582,24 @@ static bool handle_wireaddr_listen(struct daemon *daemon,
case ADDR_TYPE_IPV4:
wireaddr_to_ipv4(wireaddr, &addr);
/* We might fail if IPv6 bound to port first */
fd = make_listen_fd(AF_INET, &addr, sizeof(addr),
!had_ipv6_wildcard);
fd = make_listen_fd(AF_INET, &addr, sizeof(addr), mayfail);
if (fd >= 0) {
status_trace("Created IPv4 listener on port %u",
wireaddr->port);
io_new_listener(daemon, fd, connection_in, daemon);
return true;
}
return false;
case ADDR_TYPE_IPV6:
wireaddr_to_ipv6(wireaddr, &addr6);
if (memeqzero(&addr6.sin6_addr, sizeof(addr6.sin6_addr)))
had_ipv6_wildcard = true;
else
had_ipv6_wildcard = false;
fd = make_listen_fd(AF_INET6, &addr6, sizeof(addr6), true);
fd = make_listen_fd(AF_INET6, &addr6, sizeof(addr6), mayfail);
if (fd >= 0) {
status_trace("Created IPv6 listener on port %u",
wireaddr->port);
io_new_listener(daemon, fd, connection_in, daemon);
return true;
}
return had_ipv6_wildcard;
return false;
case ADDR_TYPE_PADDING:
break;
}
@ -1604,11 +1609,12 @@ static bool handle_wireaddr_listen(struct daemon *daemon,
static void setup_listeners(struct daemon *daemon)
{
bool had_ipv6_wildcard = false;
struct sockaddr_un addrun;
int fd;
for (size_t i = 0; i < tal_count(daemon->wireaddrs); i++) {
struct wireaddr wa = daemon->wireaddrs[i].u.wireaddr;
if (!(daemon->listen_announce[i] & ADDR_LISTEN))
continue;
@ -1623,10 +1629,22 @@ static void setup_listeners(struct daemon *daemon)
addrun.sun_path);
io_new_listener(daemon, fd, connection_in, daemon);
continue;
case ADDR_INTERNAL_ALLPROTO: {
bool ipv6_ok;
memset(wa.addr, 0, sizeof(wa.addr));
wa.type = ADDR_TYPE_IPV6;
wa.addrlen = 16;
ipv6_ok = handle_wireaddr_listen(daemon, &wa, true);
wa.type = ADDR_TYPE_IPV4;
wa.addrlen = 4;
/* OK if this fails, as long as one succeeds! */
handle_wireaddr_listen(daemon, &wa, ipv6_ok);
continue;
}
case ADDR_INTERNAL_WIREADDR:
had_ipv6_wildcard = handle_wireaddr_listen(
daemon, &daemon->wireaddrs[i].u.wireaddr,
had_ipv6_wildcard);
handle_wireaddr_listen(daemon, &wa, false);
continue;
}
/* Shouldn't happen. */
@ -1673,19 +1691,12 @@ static struct io_plan *gossip_activate(struct daemon_conn *master,
const u8 *msg)
{
bool listen;
bool guess_addrs;
u16 port;
if (!fromwire_gossipctl_activate(msg, &listen, &guess_addrs, &port))
if (!fromwire_gossipctl_activate(msg, &listen))
master_badmsg(WIRE_GOSSIPCTL_ACTIVATE, msg);
if (listen) {
if (guess_addrs)
guess_addresses(&daemon->wireaddrs,
&daemon->listen_announce,
port);
if (listen)
setup_listeners(daemon);
}
/* OK, we're ready! */
daemon_conn_send(&daemon->master,
@ -1808,6 +1819,10 @@ static struct io_plan *conn_init(struct io_conn *conn, struct reaching *reach)
ai.ai_addrlen = sizeof(sin);
ai.ai_addr = (struct sockaddr *)&sun;
break;
case ADDR_INTERNAL_ALLPROTO:
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Can't reach to all protocols");
break;
case ADDR_INTERNAL_WIREADDR:
switch (reach->addr.u.wireaddr.type) {
case ADDR_TYPE_IPV4:
@ -1950,6 +1965,9 @@ static void try_reach_peer(struct daemon *daemon, const struct pubkey *id,
case ADDR_INTERNAL_SOCKNAME:
af = AF_LOCAL;
break;
case ADDR_INTERNAL_ALLPROTO:
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Can't reach ALLPROTO");
case ADDR_INTERNAL_WIREADDR:
switch (a->addr.u.wireaddr.type) {
case ADDR_TYPE_IPV4:

3
gossipd/gossip_wire.csv
View File

@ -23,9 +23,6 @@ gossipctl_init,,reconnect,bool
gossipctl_activate,3025
# Do we listen?
gossipctl_activate,,listen,bool
gossipctl_activate,,guess_addresses,bool
# FIXME: Hack for deprecated --port option.
gossipctl_activate,,port,u16
# Gossipd->master, I am ready, here are the final addresses.
gossipctl_activate_reply,3125

1 #include <common/cryptomsg.h>
23 gossipctl_activate,,listen,bool
24 gossipctl_activate,,guess_addresses,bool # Gossipd->master, I am ready, here are the final addresses.
25 # FIXME: Hack for deprecated --port option. gossipctl_activate_reply,3125
gossipctl_activate,,port,u16
# Gossipd->master, I am ready, here are the final addresses.
gossipctl_activate_reply,3125
26 gossipctl_activate_reply,,num_wireaddrs,u16
27 gossipctl_activate_reply,,wireaddrs,num_wireaddrs*struct wireaddr_internal
28 gossipctl_activate_reply,,listen_announce,num_wireaddrs*enum addr_listen_announce

3
lightningd/connect_control.c
View File

@ -151,7 +151,8 @@ static void json_connect(struct command *cmd,
} else {
port = DEFAULT_PORT;
}
if (!parse_wireaddr_internal(name, &addr, port, &err_msg)) {
if (!parse_wireaddr_internal(name, &addr, port, false,
&err_msg)) {
command_fail(cmd, "Host %s:%u not valid: %s",
name, port, err_msg ? err_msg : "port is 0");
return;

18
lightningd/gossip_control.c
View File

@ -183,6 +183,8 @@ void gossip_init(struct lightningd *ld)
u8 *msg;
int hsmfd;
u64 capabilities = HSM_CAP_ECDH | HSM_CAP_SIGN_GOSSIP;
struct wireaddr_internal *wireaddrs = ld->wireaddrs;
enum addr_listen_announce *listen_announce = ld->listen_announce;
msg = towire_hsm_client_hsmfd(tmpctx, &ld->id, capabilities);
if (!wire_sync_write(ld->hsm_fd, msg))
@ -202,12 +204,21 @@ void gossip_init(struct lightningd *ld)
if (!ld->gossip)
err(1, "Could not subdaemon gossip");
/* If no addr specified, hand wildcard to gossipd */
if (tal_count(wireaddrs) == 0 && ld->autolisten) {
wireaddrs = tal_arrz(tmpctx, struct wireaddr_internal, 1);
listen_announce = tal_arr(tmpctx, enum addr_listen_announce, 1);
wireaddrs->itype = ADDR_INTERNAL_ALLPROTO;
wireaddrs->u.port = ld->portnum;
*listen_announce = ADDR_LISTEN_AND_ANNOUNCE;
}
msg = towire_gossipctl_init(
tmpctx, ld->config.broadcast_interval,
&get_chainparams(ld)->genesis_blockhash, &ld->id,
get_offered_global_features(tmpctx),
get_offered_local_features(tmpctx), ld->wireaddrs,
ld->listen_announce, ld->rgb,
get_offered_local_features(tmpctx), wireaddrs,
listen_announce, ld->rgb,
ld->alias, ld->config.channel_update_interval, ld->reconnect);
subd_send_msg(ld->gossip, msg);
}
@ -234,8 +245,7 @@ static void gossip_activate_done(struct subd *gossip UNUSED,
void gossip_activate(struct lightningd *ld)
{
const u8 *msg = towire_gossipctl_activate(NULL, ld->listen, ld->autolisten,
ld->portnum);
const u8 *msg = towire_gossipctl_activate(NULL, ld->listen);
subd_req(ld->gossip, ld->gossip, take(msg), -1, 0,
gossip_activate_done, NULL);

6
lightningd/json.c
View File

@ -154,6 +154,12 @@ void json_add_address_internal(struct json_result *response,
json_add_string(response, "socket", addr->u.sockname);
json_object_end(response);
return;
case ADDR_INTERNAL_ALLPROTO:
json_object_start(response, fieldname);
json_add_string(response, "type", "any protocol");
json_add_num(response, "port", addr->u.port);
json_object_end(response);
return;
case ADDR_INTERNAL_WIREADDR:
json_add_address(response, fieldname, &addr->u.wireaddr);
return;

3
lightningd/options.c
View File

@ -158,7 +158,8 @@ static char *opt_add_addr_withtype(const char *arg,
tal_resize(&ld->listen_announce, n+1);
ld->listen_announce[n] = ala;
if (!parse_wireaddr_internal(arg, &ld->wireaddrs[n], ld->portnum, &err_msg)) {
if (!parse_wireaddr_internal(arg, &ld->wireaddrs[n], ld->portnum,
true, &err_msg)) {
return tal_fmt(NULL, "Unable to parse address '%s': %s", arg, err_msg);
}

7
tests/test_lightningd.py
View File

@ -4281,6 +4281,13 @@ class LightningDTests(BaseLightningDTests):
bitcoind.generate_block(1)
l1.daemon.wait_for_log('ONCHAIN')
def test_address(self):
l1 = self.node_factory.get_node()
assert len(l1.rpc.getinfo()['address']) == 1
assert l1.rpc.getinfo()['address'][0]['type'] == 'ipv4'
assert l1.rpc.getinfo()['address'][0]['address'] == '127.0.0.1'
assert int(l1.rpc.getinfo()['address'][0]['port']) == l1.port
def test_listconfigs(self):
l1 = self.node_factory.get_node()

2
wallet/wallet.c
View File

@ -510,7 +510,7 @@ static struct peer *wallet_peer_load(struct wallet *w, const u64 dbid)
addrstr = sqlite3_column_text(stmt, 2);
if (addrstr) {
addrp = &addr;
if (!parse_wireaddr_internal((const char*)addrstr, addrp, DEFAULT_PORT, NULL)) {
if (!parse_wireaddr_internal((const char*)addrstr, addrp, DEFAULT_PORT, false, NULL)) {
db_stmt_done(stmt);
return NULL;
}