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bolt-gen: fixup the devtool/decodemsg printing facility

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Fixup TLV handling in the bolt printing utility, `devtools/decodemsg`
This commit is contained in:
lisa neigut
2019-07-20 22:04:59 -05:00
committed by Rusty Russell
parent cedebfd2d9
commit 281b4c241e
9 changed files with 160 additions and 43 deletions
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45
devtools/print_wire.c
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@@ -6,6 +6,7 @@
#include <errno.h>
#include <inttypes.h>
#include <stdio.h>
#include <wire/tlvstream.h>
void printwire_u8(const char *fieldname, const u8 *v)
{
@@ -161,6 +162,50 @@ void printwire_u8_array(const char *fieldname, const u8 **cursor, size_t *plen,
printf("]\n");
}
static const struct tlv_print_record_type *
find_print_record_type(u64 type,
const struct tlv_print_record_type types[],
size_t num_types)
{
for (size_t i = 0; i < num_types; i++)
if (types[i].type == type)
return types + i;
return NULL;
}
void printwire_tlvs(const char *fieldname, const u8 **cursor, size_t *plen,
const struct tlv_print_record_type types[],
size_t num_types)
{
while (*plen > 0) {
u64 type, length;
const struct tlv_print_record_type *ptype;
type = fromwire_bigsize(cursor, plen);
if (!*cursor)
goto fail;
length = fromwire_bigsize(cursor, plen);
if (!*cursor)
goto fail;
ptype = find_print_record_type(type, types, num_types);
if (ptype) {
size_t tlvlen = length;
printf("{\ntype=%"PRIu64"\nlen=%"PRIu64"\n", type, length);
ptype->print(fieldname, cursor, &tlvlen);
if (!*cursor)
goto fail;
printf("}\n");
*plen -= length;
} else
printf("**TYPE #%ld UNKNOWN for TLV %s**\n", type, fieldname);
}
return;
fail:
printf("**TRUNCATED TLV %s**\n", fieldname);
}
#define PRINTWIRE_TYPE_TO_STRING(T, N) \
void printwire_##N(const char *fieldname, const T *v) \
{ \