static int
chan_test_write_var_cell(channel_t *ch, var_cell_t *var_cell)
{
int rv = 0;
tt_assert(ch);
tt_assert(var_cell);
if (test_chan_accept_cells) {
/* Free the cell and bump the counter */
var_cell_free(var_cell);
++test_cells_written;
rv = 1;
}
/* else return 0, we didn't accept it */
done:
return rv;
}
static void
test_proto_var_cell(void *arg)
{
(void)arg;
char *mem_op_hex_tmp = NULL;
char tmp[1024];
buf_t *buf = NULL;
var_cell_t *cell = NULL;
buf = buf_new();
memset(tmp, 0xf0, sizeof(tmp));
/* Short little commands will make us say "no cell yet." */
tt_int_op(0, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 4));
tt_ptr_op(cell, OP_EQ, NULL);
buf_add(buf, "\x01\x02\x02\0x2", 4);
tt_int_op(0, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 4));
/* An incomplete fixed-length cell makes us say "no cell yet". */
buf_add(buf, "\x03", 1);
tt_int_op(0, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 4));
/* A complete fixed length-cell makes us say "not a variable-length cell" */
buf_add(buf, tmp, 509);
tt_int_op(0, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 4));
buf_clear(buf);
/* An incomplete versions cell is a variable-length cell that isn't ready
* yet. */
buf_add(buf,
"\x01\x02\x03\x04" /* circid */
"\x07" /* VERSIONS */
"\x00\x04" /* 4 bytes long */
"\x00" /* incomplete */, 8);
tt_int_op(1, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 4));
tt_ptr_op(cell, OP_EQ, NULL);
/* Complete it, and it's a variable-length cell. Leave a byte on the end for
* fun. */
buf_add(buf, "\x09\x00\x25\ff", 4);
tt_int_op(1, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 4));
tt_ptr_op(cell, OP_NE, NULL);
tt_int_op(cell->command, OP_EQ, CELL_VERSIONS);
tt_uint_op(cell->circ_id, OP_EQ, 0x01020304);
tt_int_op(cell->payload_len, OP_EQ, 4);
test_mem_op_hex(cell->payload, OP_EQ, "00090025");
var_cell_free(cell);
cell = NULL;
tt_int_op(buf_datalen(buf), OP_EQ, 1);
buf_clear(buf);
/* In link protocol 3 and earlier, circid fields were two bytes long. Let's
* ensure that gets handled correctly. */
buf_add(buf,
"\x23\x45\x81\x00\x06" /* command 81; 6 bytes long */
"coraje", 11);
tt_int_op(1, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 3));
tt_ptr_op(cell, OP_NE, NULL);
tt_int_op(cell->command, OP_EQ, 129);
tt_uint_op(cell->circ_id, OP_EQ, 0x2345);
tt_int_op(cell->payload_len, OP_EQ, 6);
tt_mem_op(cell->payload, OP_EQ, "coraje", 6);
var_cell_free(cell);
cell = NULL;
tt_int_op(buf_datalen(buf), OP_EQ, 0);
/* In link protocol 2, only VERSIONS cells counted as variable-length */
buf_add(buf,
"\x23\x45\x81\x00\x06"
"coraje", 11); /* As above */
tt_int_op(0, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 2));
buf_clear(buf);
buf_add(buf,
"\x23\x45\x07\x00\x06"
"futuro", 11);
tt_int_op(1, OP_EQ, fetch_var_cell_from_buf(buf, &cell, 2));
tt_ptr_op(cell, OP_NE, NULL);
tt_int_op(cell->command, OP_EQ, 7);
tt_uint_op(cell->circ_id, OP_EQ, 0x2345);
tt_int_op(cell->payload_len, OP_EQ, 6);
tt_mem_op(cell->payload, OP_EQ, "futuro", 6);
var_cell_free(cell);
cell = NULL;
done:
buf_free(buf);
var_cell_free(cell);
tor_free(mem_op_hex_tmp);
}
