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Use created_cell_format where appropriate

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This commit is contained in:
Nick Mathewson 2012-12-05 23:44:27 -05:00
parent 6c69b16c93
commit 115e8fe9a5
5 changed files with 23 additions and 18 deletions
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19
src/or/circuitbuild.c
View File

@ -1471,24 +1471,25 @@ circuit_truncated(origin_circuit_t *circ, crypt_path_t *layer, int reason)
* cell back.
*/
int
onionskin_answer(or_circuit_t *circ, uint8_t cell_type, const char *payload,
size_t payload_len, const char *keys,
onionskin_answer(or_circuit_t *circ,
const created_cell_t *created_cell,
const char *keys,
const uint8_t *rend_circ_nonce)
{
cell_t cell;
crypt_path_t *tmp_cpath;
if (created_cell_format(&cell, created_cell) < 0) {
log_warn(LD_BUG,"couldn't format created cell");
return -1;
}
cell.circ_id = circ->p_circ_id;
tmp_cpath = tor_malloc_zero(sizeof(crypt_path_t));
tmp_cpath->magic = CRYPT_PATH_MAGIC;
memset(&cell, 0, sizeof(cell_t));
cell.command = cell_type;
cell.circ_id = circ->p_circ_id;
circuit_set_state(TO_CIRCUIT(circ), CIRCUIT_STATE_OPEN);
memcpy(cell.payload, payload, payload_len);
log_debug(LD_CIRC,"init digest forward 0x%.8x, backward 0x%.8x.",
(unsigned int)get_uint32(keys),
(unsigned int)get_uint32(keys+20));
@ -1506,7 +1507,7 @@ onionskin_answer(or_circuit_t *circ, uint8_t cell_type, const char *payload,
memcpy(circ->rend_circ_nonce, rend_circ_nonce, DIGEST_LEN);
circ->is_first_hop = (cell_type == CELL_CREATED_FAST);
circ->is_first_hop = (created_cell->cell_type == CELL_CREATED_FAST);
append_cell_to_circuit_queue(TO_CIRCUIT(circ),
circ->p_chan, &cell, CELL_DIRECTION_IN, 0);

4
src/or/circuitbuild.h
View File

@ -35,8 +35,8 @@ int circuit_finish_handshake(origin_circuit_t *circ,
const struct created_cell_t *created_cell);
int circuit_truncated(origin_circuit_t *circ, crypt_path_t *layer,
int reason);
int onionskin_answer(or_circuit_t *circ, uint8_t cell_type,
const char *payload, size_t payload_len,
int onionskin_answer(or_circuit_t *circ,
const struct created_cell_t *created_cell,
const char *keys,
const uint8_t *rend_circ_nonce);
int circuit_all_predicted_ports_handled(time_t now, int *need_uptime,

11
src/or/command.c
View File

@ -274,19 +274,21 @@ command_process_create_cell(cell_t *cell, channel_t *chan)
/* This is a CREATE_FAST cell; we can handle it immediately without using
* a CPU worker. */
uint8_t keys[CPATH_KEY_MATERIAL_LEN];
uint8_t reply[MAX_ONIONSKIN_REPLY_LEN];
uint8_t rend_circ_nonce[DIGEST_LEN];
int len;
created_cell_t created_cell;
/* Make sure we never try to use the OR connection on which we
* received this cell to satisfy an EXTEND request, */
channel_mark_client(chan);
memset(&created_cell, 0, sizeof(created_cell));
len = onion_skin_server_handshake(ONION_HANDSHAKE_TYPE_FAST,
create_cell->onionskin,
create_cell->handshake_len,
NULL,
reply, keys, CPATH_KEY_MATERIAL_LEN,
created_cell.reply,
keys, CPATH_KEY_MATERIAL_LEN,
rend_circ_nonce);
tor_free(create_cell);
if (len < 0) {
@ -295,7 +297,10 @@ command_process_create_cell(cell_t *cell, channel_t *chan)
tor_free(create_cell);
return;
}
if (onionskin_answer(circ, CELL_CREATED_FAST, (const char *)reply, len,
created_cell.cell_type = CELL_CREATED_FAST;
created_cell.handshake_len = len;
if (onionskin_answer(circ, &created_cell,
(const char *)keys, rend_circ_nonce)<0) {
log_warn(LD_OR,"Failed to reply to CREATE_FAST cell. Closing.");
circuit_mark_for_close(TO_CIRCUIT(circ), END_CIRC_REASON_INTERNAL);

4
src/or/cpuworker.c
View File

@ -206,9 +206,7 @@ connection_cpu_process_inbuf(connection_t *conn)
}
tor_assert(! CIRCUIT_IS_ORIGIN(circ));
if (onionskin_answer(TO_OR_CIRCUIT(circ),
rpl.created_cell.cell_type,
(const char*)rpl.created_cell.reply,
rpl.created_cell.handshake_len,
&rpl.created_cell,
(const char*)rpl.keys,
rpl.rend_auth_material) < 0) {
log_warn(LD_OR,"onionskin_answer failed. Closing.");

3
src/or/onion.c
View File

@ -496,6 +496,8 @@ parse_create2_payload(create_cell_t *cell_out, const uint8_t *p, size_t p_len)
if (cell_out->handshake_len > CELL_PAYLOAD_SIZE - 4 ||
cell_out->handshake_len > p_len - 4)
return -1;
if (cell_out->handshake_type == ONION_HANDSHAKE_TYPE_FAST)
return -1;
memcpy(cell_out->onionskin, p+4, cell_out->handshake_len);
return 0;
}
@ -710,7 +712,6 @@ extend_cell_parse(extend_cell_t *cell_out, const uint8_t command,
return -1;
if (parse_create2_payload(&cell_out->create_cell,payload,eop-payload)<0)
return -1;
break;
}
default: