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gossip: Added nested message types for getnodes query

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Added a struct that represents a single entry in a `getnodes` reply,
so that we can append one after the other and parse them again on the
other side.
This commit is contained in:
Christian Decker 2017-03-15 10:43:03 +01:00
parent 8d5591f110
commit 74df755a29
3 changed files with 43 additions and 0 deletions
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1
lightningd/Makefile
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@ -45,6 +45,7 @@ LIGHTNINGD_LIB_SRC := \
lightningd/debug.c \
lightningd/derive_basepoints.c \
lightningd/funding_tx.c \
lightningd/gossip_msg.c \
lightningd/htlc_tx.c \
lightningd/key_derive.c \
lightningd/msg_queue.c \

27
lightningd/gossip_msg.c Normal file
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@ -0,0 +1,27 @@
#include <lightningd/gossip_msg.h>
#include <wire/wire.h>
void fromwire_gossip_getnodes_entry(const u8 **pptr, size_t *max, struct gossip_getnodes_entry *entry)
{
u8 hostnamelen;
fromwire_pubkey(pptr, max, &entry->nodeid);
hostnamelen = fromwire_u8(pptr, max);
entry->hostname = tal_arr(entry, char, hostnamelen);
fromwire_u8_array(pptr, max, (u8*)entry->hostname, hostnamelen);
entry->port = fromwire_u16(pptr, max);
}
void towire_gossip_getnodes_entry(u8 **pptr, const struct gossip_getnodes_entry *entry)
{
u8 hostnamelen;
towire_pubkey(pptr, &entry->nodeid);
if (entry->hostname) {
hostnamelen = strlen(entry->hostname);
towire_u8(pptr, hostnamelen);
towire_u8_array(pptr, (u8*)entry->hostname, hostnamelen);
}else {
/* If we don't have a hostname just write an empty string */
hostnamelen = 0;
towire_u8(pptr, hostnamelen);
}
towire_u16(pptr, entry->port);
}

15
lightningd/gossip_msg.h Normal file
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@ -0,0 +1,15 @@
#ifndef LIGHTNING_LIGHTNINGD_GOSSIP_MSG_H
#define LIGHTNING_LIGHTNINGD_GOSSIP_MSG_H
#include "config.h"
#include <bitcoin/pubkey.h>
struct gossip_getnodes_entry {
struct pubkey nodeid;
char *hostname;
u16 port;
};
void fromwire_gossip_getnodes_entry(const u8 **pptr, size_t *max, struct gossip_getnodes_entry *entry);
void towire_gossip_getnodes_entry(u8 **pptr, const struct gossip_getnodes_entry *entry);
#endif /* LIGHTNING_LIGHTGNINGD_GOSSIP_MSG_H */