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r12230@catbus: nickm | 2007-03-17 17:34:32 -0400

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Remove some duplicated code in control.c: unify the "parse space-separated arguments and warn if there are too few" logic into a single helper function.


svn:r9866
This commit is contained in:
Nick Mathewson 2007-03-17 21:34:41 +00:00
parent d787ef906a
commit 141efb86ff
1 changed files with 55 additions and 48 deletions
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103
src/or/control.c
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@ -1705,6 +1705,32 @@ get_purpose(char **string, int for_circuits, uint8_t *purpose)
return 0;
}
/** Return a newly allocated smartlist containing the arguments to the command
* waiting in <b>body</b>. If there are fewer than <b>min_args</b> arguments,
* or if <b>max_args</b> is nonnegative and there are more than
* <b>max_args</b> arguments, send a 512 error to the controller, using
* <b>command</b> as the command name in the error message. */
static smartlist_t *
getargs_helper(const char *command, control_connection_t *conn,
const char *body, int min_args, int max_args)
{
smartlist_t *args = smartlist_create();
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args) < min_args) {
connection_printf_to_buf(conn, "512 Missing argument to %s\r\n",command);
goto err;
} else if (max_args >= 0 && smartlist_len(args) > max_args) {
connection_printf_to_buf(conn, "512 Too many arguments to %s\r\n",command);
goto err;
}
return args;
err:
SMARTLIST_FOREACH(args, char *, s, tor_free(s));
smartlist_free(args);
return NULL;
}
/** Called when we get an EXTENDCIRCUIT message. Try to extend the listed
* circuit, and report success or failure. */
static int
@ -1720,16 +1746,9 @@ handle_control_extendcircuit(control_connection_t *conn, uint32_t len,
router_nicknames = smartlist_create();
args = smartlist_create();
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args)<2) {
connection_printf_to_buf(conn,
"512 Missing argument to EXTENDCIRCUIT\r\n");
SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
smartlist_free(args);
args = getargs_helper("EXTENDCIRCUIT", conn, body, 2, -1);
if (!args)
goto done;
}
zero_circ = !strcmp("0", (char*)smartlist_get(args,0));
if (!zero_circ && !(circ = get_circ(smartlist_get(args,0)))) {
@ -1825,16 +1844,14 @@ handle_control_setpurpose(control_connection_t *conn, int for_circuits,
origin_circuit_t *circ = NULL;
routerinfo_t *ri = NULL;
uint8_t new_purpose;
smartlist_t *args = smartlist_create();
smartlist_t *args;
const char *command =
for_circuits ? "SETCIRCUITPURPOSE" : "SETROUTERPURPOSE";
(void) len; /* body is nul-terminated, so it's safe to ignore the length. */
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args)<2) {
connection_printf_to_buf(conn,
"512 Missing argument to SET%sPURPOSE\r\n",
for_circuits ? "CIRCUIT" : "ROUTER");
args = getargs_helper(command, conn, body, 2, -1);
if (!args)
goto done;
}
if (for_circuits) {
if (!(circ = get_circ(smartlist_get(args,0)))) {
@ -1865,8 +1882,10 @@ handle_control_setpurpose(control_connection_t *conn, int for_circuits,
connection_write_str_to_buf("250 OK\r\n", conn);
done:
SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
smartlist_free(args);
if (args) {
SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
smartlist_free(args);
}
return 0;
}
@ -1882,16 +1901,9 @@ handle_control_attachstream(control_connection_t *conn, uint32_t len,
smartlist_t *args;
(void) len;
args = smartlist_create();
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args)<2) {
connection_printf_to_buf(conn,
"512 Missing argument to ATTACHSTREAM\r\n");
SMARTLIST_FOREACH(args, char *, cp, tor_free(cp));
smartlist_free(args);
args = getargs_helper("ATTACHSTREAM", conn, body, 2, -1);
if (!args)
return 0;
}
zero_circ = !strcmp("0", (char*)smartlist_get(args,1));
@ -1962,6 +1974,7 @@ handle_control_postdescriptor(control_connection_t *conn, uint32_t len,
smartlist_t *args = smartlist_create();
tor_assert(cp);
*cp++ = '\0';
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args)) {
@ -2008,13 +2021,11 @@ handle_control_redirectstream(control_connection_t *conn, uint32_t len,
smartlist_t *args;
(void) len;
args = smartlist_create();
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args) < 2)
connection_printf_to_buf(conn,
"512 Missing argument to REDIRECTSTREAM\r\n");
else if (!(ap_conn = get_stream(smartlist_get(args, 0)))
args = getargs_helper("REDIRECTSTREAM", conn, body, 2, -1);
if (!args)
return 0;
if (!(ap_conn = get_stream(smartlist_get(args, 0)))
|| !ap_conn->socks_request) {
connection_printf_to_buf(conn, "552 Unknown stream \"%s\"\r\n",
(char*)smartlist_get(args, 0));
@ -2058,12 +2069,10 @@ handle_control_closestream(control_connection_t *conn, uint32_t len,
int ok;
(void) len;
args = smartlist_create();
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args)<2)
connection_printf_to_buf(conn,
"512 Missing argument to CLOSESTREAM\r\n");
args = getargs_helper("CLOSESTREAM", conn, body, 2, -1);
if (!args)
return 0;
else if (!(ap_conn = get_stream(smartlist_get(args, 0))))
connection_printf_to_buf(conn, "552 Unknown stream \"%s\"\r\n",
(char*)smartlist_get(args, 0));
@ -2097,13 +2106,11 @@ handle_control_closecircuit(control_connection_t *conn, uint32_t len,
smartlist_t *args;
(void) len;
args = smartlist_create();
smartlist_split_string(args, body, " ",
SPLIT_SKIP_SPACE|SPLIT_IGNORE_BLANK, 0);
if (smartlist_len(args)<1)
connection_printf_to_buf(conn,
"512 Missing argument to CLOSECIRCUIT\r\n");
else if (!(circ=get_circ(smartlist_get(args, 0))))
args = getargs_helper("CLOSECIRCUIT", conn, body, 1, -1);
if (!args)
return 0;
if (!(circ=get_circ(smartlist_get(args, 0))))
connection_printf_to_buf(conn, "552 Unknown circuit \"%s\"\r\n",
(char*)smartlist_get(args, 0));
else {