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Make ACI anti-collision logic work; make sure that cells are filled with 0s.

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svn:r176
This commit is contained in:
Nick Mathewson 2003-03-11 21:38:38 +00:00
parent 1c8279ca39
commit e3368a65a9
4 changed files with 15 additions and 5 deletions
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9
src/or/circuit.c
View File

@ -113,10 +113,10 @@ try_again:
crypto_pseudo_rand(2, (unsigned char *)&test_aci);
if(aci_type == ACI_TYPE_LOWER && test_aci >= (2<<15))
test_aci -= (2<<15);
if(aci_type == ACI_TYPE_HIGHER && test_aci < (2<<15))
test_aci += (2<<15);
if(aci_type == ACI_TYPE_LOWER && test_aci >= (1<<15))
test_aci -= (1<<15);
if(aci_type == ACI_TYPE_HIGHER && test_aci < (1<<15))
test_aci += (1<<15);
/* if aci_type == ACI_BOTH, don't filter any of it */
if(test_aci == 0)
@ -489,6 +489,7 @@ int circuit_consider_sending_sendme(circuit_t *circ, int edge_type) {
assert(circ);
memset(&sendme, 0, sizeof(cell_t));
sendme.command = CELL_SENDME;
sendme.length = CIRCWINDOW_INCREMENT;

7
src/or/connection.c
View File

@ -479,6 +479,8 @@ void connection_send_cell(connection_t *conn) {
connection_write_cell_to_buf(&cell, conn);
}
/* ???? If we might not have added a cell above, why are we
* ???? increasing outbuf_flushlen? -NM */
conn->outbuf_flushlen += sizeof(cell_t); /* instruct it to send a cell */
connection_start_writing(conn);
@ -512,6 +514,7 @@ int connection_send_destroy(aci_t aci, connection_t *conn) {
return 0;
}
memset(&cell, 0, sizeof(cell_t));
cell.aci = aci;
cell.command = CELL_DESTROY;
log(LOG_INFO,"connection_send_destroy(): Sending destroy (aci %d).",aci);
@ -606,6 +609,9 @@ repeat_connection_package_raw_inbuf:
if(!amount_to_process)
return 0;
/* Initialize the cell with 0's */
memset(&cell, 0, sizeof(cell_t));
if(amount_to_process > CELL_PAYLOAD_SIZE - TOPIC_HEADER_SIZE) {
cell.length = CELL_PAYLOAD_SIZE - TOPIC_HEADER_SIZE;
} else {
@ -679,6 +685,7 @@ int connection_consider_sending_sendme(connection_t *conn, int edge_type) {
return 0;
}
memset(&cell, 0, sizeof(cell_t));
*(uint16_t *)(cell.payload+2) = htons(conn->topic_id);
*cell.payload = TOPIC_COMMAND_SENDME;
cell.length += TOPIC_HEADER_SIZE;

2
src/or/connection_ap.c
View File

@ -314,6 +314,8 @@ int ap_handshake_send_onion(connection_t *ap_conn, connection_t *n_conn, circuit
} else { /* last cell */
cell.length = dataleft;
memcpy(cell.payload, tmpbuf + tmpbuflen - dataleft, dataleft);
/* fill extra space with 0 bytes */
memset(cell.payload + dataleft, 0, CELL_PAYLOAD_SIZE - dataleft);
connection_write_cell_to_buf(&cell, n_conn);
dataleft = 0;
}

2
src/or/main.c
View File

@ -342,7 +342,7 @@ int prepare_for_poll(int *timeout) {
/* either a full router, or we've got a circuit. send a padding cell. */
// log(LOG_DEBUG,"prepare_for_poll(): Sending keepalive to (%s:%d)",
// tmpconn->address, tmpconn->port);
// memset(&cell,0,sizeof(cell_t));
memset(&cell,0,sizeof(cell_t));
cell.command = CELL_PADDING;
if(connection_write_cell_to_buf(&cell, tmpconn) < 0)
tmpconn->marked_for_close = 1;