gossipd: rewrite to do the handshake internally.
Now the flow is much simpler from a lightningd POV:
1. If we want to connect to a peer, just send gossipd `gossipctl_reach_peer`.
2. Every new peer, gossipd hands up to lightningd, with global/local features
and the peer fd and a gossip fd using `gossip_peer_connected`
3. If lightningd doesn't want it, it just hands the peerfd and global/local
features back to gossipd using `gossipctl_handle_peer`
4. If a peer sends a non-gossip msg (eg `open_channel`) the gossipd sends
it up using `gossip_peer_nongossip`.
5. If lightningd wants to fund a channel, it simply calls `release_channel`.
Notes:
* There's no more "unique_id": we use the peer id.
* For the moment, we don't ask gossipd when we're told to list peers, so
connected peers without a channel don't appear in the JSON getpeers API.
* We add a `gossipctl_peer_addrhint` for the moment, so you can connect to
a specific ip/port, but using other sources is a TODO.
* We now (correctly) only give up on reaching a peer after we exchange init
messages, which changes the test_disconnect case.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
7 years ago
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/* FIXME: We should deprecate this in favor of BOLT7 address descriptor */
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#ifndef LIGHTNING_LIGHTNINGD_NETADDR_H
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#define LIGHTNING_LIGHTNINGD_NETADDR_H
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#include "config.h"
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#include <ccan/tal/tal.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <sys/socket.h>
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struct addrinfo;
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/* This can be extended to support other protocols in future. */
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struct netaddr {
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int type; /* See socket(2): SOCK_STREAM currently */
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int protocol; /* See socket(2): 0 currently */
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socklen_t addrlen;
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union {
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struct sockaddr s;
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struct sockaddr_in ipv4;
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struct sockaddr_in6 ipv6;
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} saddr;
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};
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/* Get the name for this netaddr. */
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char *netaddr_name(const tal_t *ctx, const struct netaddr *a);
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/* Create a addrinfo (as wanted by io_connect) for this address. */
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void netaddr_to_addrinfo(struct addrinfo *ai, const struct netaddr *a);
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bool netaddr_from_fd(int fd, int type, int protocol, struct netaddr *a);
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bool netaddr_from_blob(const void *linear, size_t len, struct netaddr *a);
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char *netaddr_to_hex(const tal_t *ctx, const struct netaddr *a);
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#endif /* LIGHTNING_LIGHTNINGD_NETADDR_H */
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