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common/onion: cleanup by removing unnecessary local temporary.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2022-10-17 11:14:39 +10:30
parent 21e7c3432e
commit 325fe2e04c
1 changed files with 25 additions and 34 deletions
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59
common/onion.c
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@ -240,7 +240,6 @@ struct onion_payload *onion_decode(const tal_t *ctx,
struct onion_payload *p = tal(ctx, struct onion_payload);
const u8 *cursor = rs->raw_payload;
size_t max = tal_bytelen(cursor), len;
struct tlv_tlv_payload *tlv;
/* BOLT-remove-legacy-onion #4:
* 1. type: `hop_payloads`
@ -252,26 +251,26 @@ struct onion_payload *onion_decode(const tal_t *ctx,
if (!cursor || len > max) {
*failtlvtype = 0;
*failtlvpos = tal_bytelen(rs->raw_payload);
goto fail_no_tlv;
return tal_free(p);
}
/* We do this manually so we can accept extra types, and get
* error off and type. */
tlv = tlv_tlv_payload_new(p);
p->tlv = tlv_tlv_payload_new(p);
if (!fromwire_tlv(&cursor, &max, tlvs_tlv_tlv_payload,
TLVS_ARRAY_SIZE_tlv_tlv_payload,
tlv, &tlv->fields, accepted_extra_tlvs,
p->tlv, &p->tlv->fields, accepted_extra_tlvs,
failtlvpos, failtlvtype)) {
goto fail;
return tal_free(p);
}
if (blinding || tlv->blinding_point) {
if (blinding || p->tlv->blinding_point) {
struct tlv_encrypted_data_tlv *enc;
/* Only supported with --experimental-onion-messages! */
if (!blinding_support) {
if (!blinding)
goto fail;
return tal_free(p);
*failtlvtype = TLV_TLV_PAYLOAD_BLINDING_POINT;
goto field_bad;
}
@ -283,13 +282,13 @@ struct onion_payload *onion_decode(const tal_t *ctx,
* - MUST return an error if it is set in both the payload
* and the outer message
*/
if (blinding && tlv->blinding_point) {
if (blinding && p->tlv->blinding_point) {
*failtlvtype = TLV_TLV_PAYLOAD_BLINDING_POINT;
goto field_bad;
}
if (tlv->blinding_point)
if (p->tlv->blinding_point)
p->blinding = tal_dup(p, struct pubkey,
tlv->blinding_point);
p->tlv->blinding_point);
else
p->blinding = tal_dup(p, struct pubkey,
blinding);
@ -300,14 +299,14 @@ struct onion_payload *onion_decode(const tal_t *ctx,
* - MUST return an error if `encrypted_recipient_data` is not
* present.
*/
if (!tlv->encrypted_recipient_data) {
if (!p->tlv->encrypted_recipient_data) {
*failtlvtype = TLV_TLV_PAYLOAD_ENCRYPTED_RECIPIENT_DATA;
goto field_bad;
}
ecdh(p->blinding, &p->blinding_ss);
enc = decrypt_encrypted_data(tmpctx, p->blinding, &p->blinding_ss,
tlv->encrypted_recipient_data);
p->tlv->encrypted_recipient_data);
if (!enc) {
*failtlvtype = TLV_TLV_PAYLOAD_ENCRYPTED_RECIPIENT_DATA;
goto field_bad;
@ -358,10 +357,10 @@ struct onion_payload *onion_decode(const tal_t *ctx,
if (rs->nextcase == ONION_FORWARD) {
if (!handle_blinded_forward(p, amount_in, cltv_expiry,
tlv, enc, failtlvtype))
p->tlv, enc, failtlvtype))
goto field_bad;
} else {
if (!handle_blinded_terminal(p, tlv, enc, failtlvtype))
if (!handle_blinded_terminal(p, p->tlv, enc, failtlvtype))
goto field_bad;
}
@ -369,8 +368,6 @@ struct onion_payload *onion_decode(const tal_t *ctx,
* we use the path_id for that. */
p->payment_secret = NULL;
p->payment_metadata = NULL;
p->tlv = tal_steal(p, tlv);
return p;
}
@ -380,17 +377,17 @@ struct onion_payload *onion_decode(const tal_t *ctx,
* - MUST return an error if `amt_to_forward` or
* `outgoing_cltv_value` are not present.
*/
if (!tlv->amt_to_forward) {
if (!p->tlv->amt_to_forward) {
*failtlvtype = TLV_TLV_PAYLOAD_AMT_TO_FORWARD;
goto field_bad;
}
if (!tlv->outgoing_cltv_value) {
if (!p->tlv->outgoing_cltv_value) {
*failtlvtype = TLV_TLV_PAYLOAD_OUTGOING_CLTV_VALUE;
goto field_bad;
}
p->amt_to_forward = amount_msat(*tlv->amt_to_forward);
p->outgoing_cltv = *tlv->outgoing_cltv_value;
p->amt_to_forward = amount_msat(*p->tlv->amt_to_forward);
p->outgoing_cltv = *p->tlv->outgoing_cltv_value;
/* BOLT #4:
*
@ -400,12 +397,12 @@ struct onion_payload *onion_decode(const tal_t *ctx,
* - MUST include `short_channel_id`
*/
if (rs->nextcase == ONION_FORWARD) {
if (!tlv->short_channel_id) {
if (!p->tlv->short_channel_id) {
*failtlvtype = TLV_TLV_PAYLOAD_SHORT_CHANNEL_ID;
goto field_bad;
}
p->forward_channel = tal_dup(p, struct short_channel_id,
tlv->short_channel_id);
p->tlv->short_channel_id);
p->total_msat = NULL;
} else {
p->forward_channel = NULL;
@ -418,33 +415,27 @@ struct onion_payload *onion_decode(const tal_t *ctx,
}
p->payment_secret = NULL;
if (tlv->payment_data) {
if (p->tlv->payment_data) {
p->payment_secret = tal_dup(p, struct secret,
&tlv->payment_data->payment_secret);
&p->tlv->payment_data->payment_secret);
tal_free(p->total_msat);
p->total_msat = tal(p, struct amount_msat);
*p->total_msat
= amount_msat(tlv->payment_data->total_msat);
= amount_msat(p->tlv->payment_data->total_msat);
}
if (tlv->payment_metadata)
if (p->tlv->payment_metadata)
p->payment_metadata
= tal_dup_talarr(p, u8, tlv->payment_metadata);
= tal_dup_talarr(p, u8, p->tlv->payment_metadata);
else
p->payment_metadata = NULL;
p->blinding = NULL;
p->tlv = tal_steal(p, tlv);
return p;
field_bad:
*failtlvpos = tlv_field_offset(rs->raw_payload, tal_bytelen(rs->raw_payload),
*failtlvtype);
fail:
tal_free(tlv);
fail_no_tlv:
tal_free(p);
return NULL;
return tal_free(p);
}