tor/src/test/test_proto_misc.c

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/* Copyright (c) 2017, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file test_proto_misc.c
* \brief Test our smaller buffer-based protocol functions
*/
#include "or.h"
#include "test.h"
#include "buffers.h"
#include "connection_or.h"
#include "ext_orport.h"
#include "proto_cell.h"
#include "proto_control0.h"
#include "proto_ext_or.h"
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);
}
static void
test_proto_control0(void *arg)
{
(void)arg;
buf_t *buf = buf_new();
/* The only remaining function for the v0 control protocol is the function
that detects whether the user has stumbled across an old controller
that's using it. The format was:
u16 length;
u16 command;
u8 body[length];
*/
/* Empty buffer -- nothing to do. */
tt_int_op(0, OP_EQ, peek_buf_has_control0_command(buf));
/* 3 chars in buf -- can't tell */
buf_add(buf, "AUT", 3);
tt_int_op(0, OP_EQ, peek_buf_has_control0_command(buf));
/* command in buf -- easy to tell */
buf_add(buf, "HENTICATE ", 10);
tt_int_op(0, OP_EQ, peek_buf_has_control0_command(buf));
/* Control0 command header in buf: make sure we detect it. */
buf_clear(buf);
buf_add(buf, "\x09\x05" "\x00\x05" "blah", 8);
tt_int_op(1, OP_EQ, peek_buf_has_control0_command(buf));
done:
buf_free(buf);
}
static void
test_proto_ext_or_cmd(void *arg)
{
ext_or_cmd_t *cmd = NULL;
buf_t *buf = buf_new();
char *tmp = NULL;
(void) arg;
/* Empty -- should give "not there. */
tt_int_op(0, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tt_ptr_op(NULL, OP_EQ, cmd);
/* Three bytes: shouldn't work. */
buf_add(buf, "\x00\x20\x00", 3);
tt_int_op(0, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tt_ptr_op(NULL, OP_EQ, cmd);
tt_int_op(3, OP_EQ, buf_datalen(buf));
/* 0020 0000: That's a nil command. It should work. */
buf_add(buf, "\x00", 1);
tt_int_op(1, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tt_ptr_op(NULL, OP_NE, cmd);
tt_int_op(0x20, OP_EQ, cmd->cmd);
tt_int_op(0, OP_EQ, cmd->len);
tt_int_op(0, OP_EQ, buf_datalen(buf));
ext_or_cmd_free(cmd);
cmd = NULL;
/* Now try a length-6 command with one byte missing. */
buf_add(buf, "\x10\x21\x00\x06""abcde", 9);
tt_int_op(0, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tt_ptr_op(NULL, OP_EQ, cmd);
buf_add(buf, "f", 1);
tt_int_op(1, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tt_ptr_op(NULL, OP_NE, cmd);
tt_int_op(0x1021, OP_EQ, cmd->cmd);
tt_int_op(6, OP_EQ, cmd->len);
tt_mem_op("abcdef", OP_EQ, cmd->body, 6);
tt_int_op(0, OP_EQ, buf_datalen(buf));
ext_or_cmd_free(cmd);
cmd = NULL;
/* Now try a length-10 command with 4 extra bytes. */
buf_add(buf, "\xff\xff\x00\x0aloremipsum\x10\x00\xff\xff", 18);
tt_int_op(1, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tt_ptr_op(NULL, OP_NE, cmd);
tt_int_op(0xffff, OP_EQ, cmd->cmd);
tt_int_op(10, OP_EQ, cmd->len);
tt_mem_op("loremipsum", OP_EQ, cmd->body, 10);
tt_int_op(4, OP_EQ, buf_datalen(buf));
ext_or_cmd_free(cmd);
cmd = NULL;
/* Finally, let's try a maximum-length command. We already have the header
* waiting. */
tt_int_op(0, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tmp = tor_malloc_zero(65535);
buf_add(buf, tmp, 65535);
tt_int_op(1, OP_EQ, fetch_ext_or_command_from_buf(buf, &cmd));
tt_ptr_op(NULL, OP_NE, cmd);
tt_int_op(0x1000, OP_EQ, cmd->cmd);
tt_int_op(0xffff, OP_EQ, cmd->len);
tt_mem_op(tmp, OP_EQ, cmd->body, 65535);
tt_int_op(0, OP_EQ, buf_datalen(buf));
ext_or_cmd_free(cmd);
cmd = NULL;
done:
ext_or_cmd_free(cmd);
buf_free(buf);
tor_free(tmp);
}
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static void
test_proto_line(void *arg)
{
(void)arg;
char tmp[60];
buf_t *buf = buf_new();
#define S(str) str, sizeof(str)-1
const struct {
const char *input;
size_t input_len;
size_t line_len;
const char *output;
int returnval;
} cases[] = {
{ S("Hello world"), 0, NULL, 0 },
{ S("Hello world\n"), 12, "Hello world\n", 1 },
{ S("Hello world\nMore"), 12, "Hello world\n", 1 },
{ S("\n oh hello world\nMore"), 1, "\n", 1 },
{ S("Hello worpd\n\nMore"), 12, "Hello worpd\n", 1 },
{ S("------------------------------------------------------------\n"), 0,
NULL, -1 },
};
unsigned i;
for (i = 0; i < ARRAY_LENGTH(cases); ++i) {
buf_add(buf, cases[i].input, cases[i].input_len);
memset(tmp, 0xfe, sizeof(tmp));
size_t sz = sizeof(tmp);
int rv = buf_get_line(buf, tmp, &sz);
tt_int_op(rv, OP_EQ, cases[i].returnval);
if (rv == 1) {
tt_int_op(sz, OP_LT, sizeof(tmp));
tt_mem_op(cases[i].output, OP_EQ, tmp, sz+1);
tt_int_op(buf_datalen(buf), OP_EQ, cases[i].input_len - strlen(tmp));
tt_int_op(sz, OP_EQ, cases[i].line_len);
} else {
tt_int_op(buf_datalen(buf), OP_EQ, cases[i].input_len);
// tt_int_op(sz, OP_EQ, sizeof(tmp));
}
buf_clear(buf);
}
done:
buf_free(buf);
}
struct testcase_t proto_misc_tests[] = {
{ "var_cell", test_proto_var_cell, 0, NULL, NULL },
{ "control0", test_proto_control0, 0, NULL, NULL },
{ "ext_or_cmd", test_proto_ext_or_cmd, TT_FORK, NULL, NULL },
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{ "line", test_proto_line, 0, NULL, NULL },
END_OF_TESTCASES
};