aljaz/lightning
1
0
Fork 0
mirror of https://github.com/aljazceru/lightning.git synced 2025-12-19 15:14:23 +01:00
Code Issues Packages Projects Releases Wiki Activity

devtools/decodemsg: take series of msgs from stdin.

Browse Source 
Useful in combination with gossipwith.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-09-21 09:59:48 +09:30
committed by Christian Decker
parent 47f5bc4deb
commit d16c3dcdc7
1 changed files with 41 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
devtools/decodemsg.c
View File

@@ -1,10 +1,12 @@
#include <ccan/err/err.h>
#include <ccan/opt/opt.h>
#include <ccan/tal/grab_file/grab_file.h>
#include <common/decode_short_channel_ids.h>
#include <common/utils.h>
#include <devtools/gen_print_onion_wire.h>
#include <devtools/gen_print_wire.h>
#include <stdio.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
@@ -15,14 +17,15 @@ int main(int argc, char *argv[])
opt_register_noarg("--onion", opt_set_bool, &onion,
"Decode an error message instead of a peer message");
opt_register_noarg("--help|-h", opt_usage_and_exit,
"<hexmsg>"
"Decode a lightning spec wire message from hex.",
"[<hexmsg>]"
"Decode a lightning spec wire message from hex, or a series of messages from stdin",
"Print this message.");
opt_parse(&argc, argv, opt_log_stderr_exit);
if (argc != 2)
errx(1, "Need a hex message");
if (argc > 2)
opt_usage_and_exit("Too many arguments");
if (argc == 2) {
/* Arg is hex string */
m = tal_hexdata(NULL, argv[1], strlen(argv[1]));
if (!m)
@@ -32,5 +35,31 @@ int main(int argc, char *argv[])
printonion_type_message(m);
else
printwire_type_message(m);
} else {
u8 *f = grab_fd(NULL, STDIN_FILENO);
size_t off = 0;
while (off != tal_count(f)) {
be16 len;
if (off + sizeof(len) > tal_count(f)) {
warnx("Truncated file");
break;
}
memcpy(&len, f + off, sizeof(len));
off += sizeof(len);
if (off + be16_to_cpu(len) > tal_count(f)) {
warnx("Truncated file");
break;
}
m = tal_dup_arr(f, u8, f + off, be16_to_cpu(len), 0);
if (onion)
printonion_type_message(m);
else
printwire_type_message(m);
off += be16_to_cpu(len);
tal_free(m);
}
}
return 0;
}