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devtools/decodemsg: take series of msgs from stdin.

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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
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53
devtools/decodemsg.c
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@@ -1,10 +1,12 @@
#include <ccan/err/err.h> #include <ccan/err/err.h>
#include <ccan/opt/opt.h> #include <ccan/opt/opt.h>
#include <ccan/tal/grab_file/grab_file.h>
#include <common/decode_short_channel_ids.h> #include <common/decode_short_channel_ids.h>
#include <common/utils.h> #include <common/utils.h>
#include <devtools/gen_print_onion_wire.h> #include <devtools/gen_print_onion_wire.h>
#include <devtools/gen_print_wire.h> #include <devtools/gen_print_wire.h>
#include <stdio.h> #include <stdio.h>
#include <unistd.h>
int main(int argc, char *argv[]) int main(int argc, char *argv[])
{ {
@@ -15,22 +17,49 @@ int main(int argc, char *argv[])
opt_register_noarg("--onion", opt_set_bool, &onion, opt_register_noarg("--onion", opt_set_bool, &onion,
"Decode an error message instead of a peer message"); "Decode an error message instead of a peer message");
opt_register_noarg("--help|-h", opt_usage_and_exit, opt_register_noarg("--help|-h", opt_usage_and_exit,
"<hexmsg>" "[<hexmsg>]"
"Decode a lightning spec wire message from hex.", "Decode a lightning spec wire message from hex, or a series of messages from stdin",
"Print this message."); "Print this message.");
opt_parse(&argc, argv, opt_log_stderr_exit); opt_parse(&argc, argv, opt_log_stderr_exit);
if (argc != 2) if (argc > 2)
errx(1, "Need a hex message"); opt_usage_and_exit("Too many arguments");
/* Arg is hex string */ if (argc == 2) {
m = tal_hexdata(NULL, argv[1], strlen(argv[1])); /* Arg is hex string */
if (!m) m = tal_hexdata(NULL, argv[1], strlen(argv[1]));
errx(1, "'%s' is not valid hex", argv[1]); if (!m)
errx(1, "'%s' is not valid hex", argv[1]);
if (onion) if (onion)
printonion_type_message(m); printonion_type_message(m);
else else
printwire_type_message(m); 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; return 0;
} }