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devtools: dump-gossipstore.

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Not very useful by itself, but when combined with decodemsg it can tell
us quite a bit.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-08-30 09:34:28 +09:30
parent 6091e5158b
commit 317a830e94
5 changed files with 96 additions and 9 deletions
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1
devtools/.gitignore vendored
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@@ -1,3 +1,4 @@
bolt11-cli
decodemsg
onion
dump-gossipstore

9
devtools/Makefile
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@@ -1,6 +1,6 @@
DEVTOOLS_SRC := devtools/gen_print_wire.c devtools/gen_print_onion_wire.c devtools/print_wire.c
DEVTOOLS_OBJS := $(DEVTOOLS_SRC:.c=.o)
DEVTOOLS_TOOL_SRC := devtools/bolt11-cli.c devtools/decodemsg.c devtools/onion.c
DEVTOOLS_TOOL_SRC := devtools/bolt11-cli.c devtools/decodemsg.c devtools/onion.c devtools/dump-gossipstore.c
DEVTOOLS_TOOL_OBJS := $(DEVTOOLS_TOOL_SRC:.c=.o)
DEVTOOLS_COMMON_OBJS := \
@@ -15,7 +15,7 @@ DEVTOOLS_COMMON_OBJS := \
common/version.o \
common/wireaddr.o
devtools-all: devtools/bolt11-cli devtools/decodemsg devtools/onion
devtools-all: devtools/bolt11-cli devtools/decodemsg devtools/onion devtools/dump-gossipstore
devtools/gen_print_wire.h: $(WIRE_GEN) wire/gen_peer_wire_csv
$(WIRE_GEN) --bolt --printwire --header $@ wire_type < wire/gen_peer_wire_csv > $@
@@ -33,6 +33,9 @@ devtools/bolt11-cli: $(DEVTOOLS_OBJS) $(DEVTOOLS_COMMON_OBJS) $(JSMN_OBJS) $(CCA
devtools/decodemsg: $(DEVTOOLS_OBJS) $(DEVTOOLS_COMMON_OBJS) $(JSMN_OBJS) $(CCAN_OBJS) $(BITCOIN_OBJS) wire/fromwire.o wire/towire.o devtools/decodemsg.o
devtools/dump-gossipstore: $(DEVTOOLS_OBJS) $(DEVTOOLS_COMMON_OBJS) $(JSMN_OBJS) $(CCAN_OBJS) $(BITCOIN_OBJS) wire/fromwire.o wire/towire.o devtools/dump-gossipstore.o gossipd/gen_gossip_store.o
devtools/dump-gossipstore.o: gossipd/gen_gossip_store.h
devtools/onion.c: ccan/config.h
devtools/onion: $(DEVTOOLS_OBJS) $(DEVTOOLS_COMMON_OBJS) $(JSMN_OBJS) $(CCAN_OBJS) $(BITCOIN_OBJS) wire/fromwire.o wire/towire.o devtools/onion.o common/sphinx.o
@@ -42,7 +45,7 @@ devtools/gen_print_wire.o: devtools/gen_print_wire.h wire/gen_peer_wire.h devtoo
devtools/gen_print_onion_wire.o: devtools/gen_print_onion_wire.h devtools/print_wire.h
# Make sure these depend on everything.
ALL_PROGRAMS += devtools/bolt11-cli devtools/decodemsg devtools/onion
ALL_PROGRAMS += devtools/bolt11-cli devtools/decodemsg devtools/onion devtools/dump-gossipstore
ALL_OBJS += $(DEVTOOLS_OBJS) $(DEVTOOLS_TOOL_OBJS)
check-source: $(DEVTOOLS_SRC:%=check-src-include-order/%) $(DEVTOOLS_TOOLS_SRC:%=check-src-include-order/%)

82
devtools/dump-gossipstore.c Normal file
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@@ -0,0 +1,82 @@
#include <ccan/crc/crc.h>
#include <ccan/err/err.h>
#include <common/type_to_string.h>
#include <common/utils.h>
#include <fcntl.h>
#include <gossipd/gen_gossip_store.h>
#include <gossipd/gossip_store.h>
#include <inttypes.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
int fd;
u8 version;
beint32_t belen, becsum;
setup_locale();
if (argc > 2)
errx(1, "Need the filename of a gossip store, or stdin");
if (argc == 2) {
fd = open(argv[1], O_RDONLY);
if (fd < 0)
err(1, "Opening %s", argv[1]);
} else
fd = STDIN_FILENO;
if (read(fd, &version, sizeof(version)) != sizeof(version))
errx(1, "Empty file");
if (version != GOSSIP_STORE_VERSION)
warnx("UNSUPPORTED GOSSIP VERSION %u (expected %u)",
version, GOSSIP_STORE_VERSION);
printf("GOSSIP VERSION %u\n", version);
while (read(fd, &belen, sizeof(belen)) == sizeof(belen) &&
read(fd, &becsum, sizeof(becsum)) == sizeof(becsum)) {
u64 satoshis;
struct short_channel_id scid;
u8 *gossip_msg;
u32 msglen = be32_to_cpu(belen);
u8 *msg = tal_arr(NULL, u8, msglen);
if (read(fd, msg, msglen) != msglen)
errx(1, "Truncated file?");
if (be32_to_cpu(becsum) != crc32c(0, msg, msglen))
warnx("Checksum verification failed");
if (fromwire_gossip_store_channel_announcement(msg, msg,
&gossip_msg,
&satoshis)) {
printf("channel_announce for %"PRIu64" satoshis: %s\n",
satoshis, tal_hex(msg, gossip_msg));
} else if (fromwire_gossip_store_channel_update(msg, msg,
&gossip_msg)) {
printf("channel_update: %s\n",
tal_hex(msg, gossip_msg));
} else if (fromwire_gossip_store_node_announcement(msg, msg,
&gossip_msg)) {
printf("node_announcement: %s\n",
tal_hex(msg, gossip_msg));
} else if (fromwire_gossip_store_channel_delete(msg, &scid)) {
printf("channel_delete: %s\n",
type_to_string(msg, struct short_channel_id,
&scid));
} else if (fromwire_gossip_store_local_add_channel(
msg, msg, &gossip_msg)) {
printf("local_add_channel: %s\n",
tal_hex(msg, gossip_msg));
} else {
warnx("Unknown message %u", fromwire_peektype(msg));
}
tal_free(msg);
}
return 0;
}