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tlvs: add methods for decodemsg utility

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fixup printing methods in devtools/decodemsg such that TLV's can
now be printed as well. here's how you'd use it:

   $ ./devtools/decodemsg --tlv opening_tlv 0120001E020202020202020202020202020202020202020202020202020202020202
   > WIRE_OPTION_UPFRONT_SHUTDOWN_SCRIPT (size 32):
   > shutdown_scriptpubkey=[020202020202020202020202020202020202020202020202020202020202]
This commit is contained in:
lisa neigut
2019-04-04 20:06:49 -07:00
committed by Rusty Russell
parent fc0c97d06d
commit ed1223492b
2 changed files with 152 additions and 42 deletions
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18
devtools/decodemsg.c
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@@ -12,10 +12,14 @@ int main(int argc, char *argv[])
{
const u8 *m;
bool onion = false;
char *tlv_name = NULL;
setup_locale();
opt_register_noarg("--onion", opt_set_bool, &onion,
"Decode an error message instead of a peer message");
opt_register_arg("--tlv", opt_set_charp, opt_show_charp,
&tlv_name,
"Deocde a TLV of this type instead of a peer message");
opt_register_noarg("--help|-h", opt_usage_and_exit,
"[<hexmsg>]"
"Decode a lightning spec wire message from hex, or a series of messages from stdin",
@@ -32,7 +36,12 @@ int main(int argc, char *argv[])
errx(1, "'%s' is not valid hex", argv[1]);
if (onion)
printonion_type_message(m);
if (tlv_name)
printonion_type_tlv_message(tlv_name, m);
else
printonion_type_message(m);
else if (tlv_name)
printwire_type_tlv_message(tlv_name, m);
else
printwire_type_message(m);
} else {
@@ -54,7 +63,12 @@ int main(int argc, char *argv[])
}
m = tal_dup_arr(f, u8, f + off, be16_to_cpu(len), 0);
if (onion)
printonion_type_message(m);
if (tlv_name)
printonion_type_tlv_message(tlv_name, m);
else
printonion_type_message(m);
else if (tlv_name)
printwire_type_tlv_message(tlv_name, m);
else
printwire_type_message(m);
off += be16_to_cpu(len);