func_odbc: Introduce minargs config and expose ARGC in addition to ARGn.
minargs enables enforcing of minimum count of arguments to pass to func_odbc, so if you're unconditionally using ARG1 through ARG4 then this should be set to 4. func_odbc will generate an error in this case, so for example [FOO] minargs = 4 and ODBC_FOO(a,b,c) in dialplan will now error out instead of using a potentially leaked ARG4 from Gosub(). ARGC is needed if you're using optional argument, to verify whether or not an argument has been passed, else it's possible to use a leaked ARGn from Gosub (app_stack). So now you can safely do ${IF($[${ARGC}>3]?${ARGV}:default value)} kind of thing. Change-Id: I6ca0b137d90b03f6aa9c496991f6cbf1518f6c24 Signed-off-by: Jaco Kroon <jaco@uls.co.za>
This commit is contained in:
parent
092628c982
commit
bee35fe04a
|
@ -23,6 +23,10 @@
|
|||
; For substitution, you have ${ARG1}, ${ARG2} ... ${ARGn}
|
||||
; for the arguments to each SQL statement.
|
||||
;
|
||||
; Additionally you can use ${ARGC} to determine the number of arguments that
|
||||
; was actually passed (or risk using leaked ARGn variables from the channel).
|
||||
; Also reference the minargs configuration option.
|
||||
;
|
||||
; In addition, for write statements, you have ${VAL1}, ${VAL2} ... ${VALn}
|
||||
; parsed, just like arguments, for the values. In addition, if you want the
|
||||
; whole value, never mind the parsing, you can get that with ${VALUE}.
|
||||
|
@ -87,6 +91,13 @@
|
|||
; These additional rows can be returned by using the name of the
|
||||
; function which was called to retrieve the first row as an
|
||||
; argument to ODBC_FETCH().
|
||||
; minargs The minimum number of ARGUMENTS that has to be passed to the
|
||||
; function. If fewer arguments than this is passed, then the call
|
||||
; will fail. It is important to note that unlike Gosub() and friends,
|
||||
; func_odbc will not mask out ARGn variables that it's not actively
|
||||
; using, as such, without this, it's entirely possible to use say
|
||||
; ARG2 from the Gosub() inside func_odbc when the intent was to
|
||||
; use an argument passed to func_odbc, but it simply was never passed.
|
||||
|
||||
|
||||
; ODBC_SQL - Allow an SQL statement to be built entirely in the dialplan
|
||||
|
|
|
@ -0,0 +1,20 @@
|
|||
Subject: func_odbc
|
||||
|
||||
Introduce an ARGC variable for func_odbc functions, along with a minargs
|
||||
per-function configuration option.
|
||||
|
||||
minargs enables enforcing of minimum count of arguments to pass to
|
||||
func_odbc, so if you're unconditionally using ARG1 through ARG4 then
|
||||
this should be set to 4. func_odbc will generate an error in this case,
|
||||
so for example
|
||||
|
||||
[FOO]
|
||||
minargs = 4
|
||||
|
||||
and ODBC_FOO(a,b,c) in dialplan will now error out instead of using a
|
||||
potentially leaked ARG4 from Gosub().
|
||||
|
||||
ARGC is needed if you're using optional argument, to verify whether or
|
||||
not an argument has been passed, else it's possible to use a leaked ARGn
|
||||
from Gosub (app_stack). So now you can safely do
|
||||
${IF($[${ARGC}>3]?${ARGV}:default value)} kind of thing.
|
|
@ -120,6 +120,7 @@ struct acf_odbc_query {
|
|||
char *sql_insert;
|
||||
unsigned int flags;
|
||||
int rowlimit;
|
||||
int minargs;
|
||||
struct ast_custom_function *acf;
|
||||
};
|
||||
|
||||
|
@ -545,6 +546,14 @@ static int acf_odbc_write(struct ast_channel *chan, const char *cmd, char *s, co
|
|||
return -1;
|
||||
}
|
||||
|
||||
AST_STANDARD_APP_ARGS(args, s);
|
||||
if (args.argc < query->minargs) {
|
||||
ast_log(LOG_ERROR, "%d arguments supplied to '%s' requiring minimum %d\n",
|
||||
args.argc, cmd, query->minargs);
|
||||
AST_RWLIST_UNLOCK(&queries);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (!chan) {
|
||||
if (!(chan = ast_dummy_channel_alloc())) {
|
||||
AST_RWLIST_UNLOCK(&queries);
|
||||
|
@ -578,7 +587,8 @@ static int acf_odbc_write(struct ast_channel *chan, const char *cmd, char *s, co
|
|||
return -1;
|
||||
}
|
||||
|
||||
AST_STANDARD_APP_ARGS(args, s);
|
||||
snprintf(varname, sizeof(varname), "%u", args.argc);
|
||||
pbx_builtin_pushvar_helper(chan, "ARGC", varname);
|
||||
for (i = 0; i < args.argc; i++) {
|
||||
snprintf(varname, sizeof(varname), "ARG%d", i + 1);
|
||||
pbx_builtin_pushvar_helper(chan, varname, args.field[i]);
|
||||
|
@ -603,6 +613,8 @@ static int acf_odbc_write(struct ast_channel *chan, const char *cmd, char *s, co
|
|||
chan = ast_channel_unref(chan);
|
||||
} else {
|
||||
/* Restore prior values */
|
||||
pbx_builtin_setvar_helper(chan, "ARGC", NULL);
|
||||
|
||||
for (i = 0; i < args.argc; i++) {
|
||||
snprintf(varname, sizeof(varname), "ARG%d", i + 1);
|
||||
pbx_builtin_setvar_helper(chan, varname, NULL);
|
||||
|
@ -756,6 +768,14 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
|
|||
return -1;
|
||||
}
|
||||
|
||||
AST_STANDARD_APP_ARGS(args, s);
|
||||
if (args.argc < query->minargs) {
|
||||
ast_log(LOG_ERROR, "%d arguments supplied to '%s' requiring minimum %d\n",
|
||||
args.argc, cmd, query->minargs);
|
||||
AST_RWLIST_UNLOCK(&queries);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (!chan) {
|
||||
if (!(chan = ast_dummy_channel_alloc())) {
|
||||
AST_RWLIST_UNLOCK(&queries);
|
||||
|
@ -768,7 +788,8 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
|
|||
ast_autoservice_start(chan);
|
||||
}
|
||||
|
||||
AST_STANDARD_APP_ARGS(args, s);
|
||||
snprintf(varname, sizeof(varname), "%u", args.argc);
|
||||
pbx_builtin_pushvar_helper(chan, "ARGC", varname);
|
||||
for (x = 0; x < args.argc; x++) {
|
||||
snprintf(varname, sizeof(varname), "ARG%d", x + 1);
|
||||
pbx_builtin_pushvar_helper(chan, varname, args.field[x]);
|
||||
|
@ -780,6 +801,8 @@ static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, cha
|
|||
chan = ast_channel_unref(chan);
|
||||
} else {
|
||||
/* Restore prior values */
|
||||
pbx_builtin_setvar_helper(chan, "ARGC", NULL);
|
||||
|
||||
for (x = 0; x < args.argc; x++) {
|
||||
snprintf(varname, sizeof(varname), "ARG%d", x + 1);
|
||||
pbx_builtin_setvar_helper(chan, varname, NULL);
|
||||
|
@ -1290,6 +1313,10 @@ static int init_acf_query(struct ast_config *cfg, char *catg, struct acf_odbc_qu
|
|||
sscanf(tmp, "%30d", &((*query)->rowlimit));
|
||||
}
|
||||
|
||||
if ((tmp = ast_variable_retrieve(cfg, catg, "minargs"))) {
|
||||
sscanf(tmp, "%30d", &((*query)->minargs));
|
||||
}
|
||||
|
||||
(*query)->acf = ast_calloc(1, sizeof(struct ast_custom_function));
|
||||
if (!(*query)->acf) {
|
||||
free_acf_query(*query);
|
||||
|
|
Loading…
Reference in New Issue