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Check driver capabilities before sr_config_get/set/list.

This commit is contained in:
Bert Vermeulen 2014-11-17 13:20:05 +01:00
parent baa0c2ae67
commit c6dde8125a
1 changed files with 60 additions and 0 deletions
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60
src/hwdriver.c
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@ -419,6 +419,57 @@ SR_PRIV void sr_config_free(struct sr_config *src)
}
static int check_key(const struct sr_dev_driver *driver,
const struct sr_dev_inst *sdi, const struct sr_channel_group *cg,
uint32_t key, int op)
{
const struct sr_config_info *srci;
gsize num_opts, i;
GVariant *gvar_opts;
const uint32_t *opts;
uint32_t pub_opt;
char *suffix, *opstr;
if (sdi && cg)
suffix = " for this device and channel group";
else if (sdi)
suffix = " for this device";
else
suffix = "";
if (!(srci = sr_config_info_get(key))) {
sr_err("Invalid key %d.", key);
return SR_ERR_ARG;
}
opstr = op == SR_CONF_GET ? "get" : op == SR_CONF_SET ? "set" : "list";
if (sr_config_list(driver, sdi, cg, SR_CONF_DEVICE_OPTIONS, &gvar_opts) != SR_OK) {
/* Driver publishes no options. */
sr_err("No options available%s.", srci->id, suffix);
return SR_ERR_ARG;
}
opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(uint32_t));
pub_opt = 0;
for (i = 0; i < num_opts; i++) {
if ((opts[i] & SR_CONF_MASK) == key) {
pub_opt = opts[i];
break;
}
}
g_variant_unref(gvar_opts);
if (!pub_opt) {
sr_err("Option '%s' not available%s.", srci->id, suffix);
return SR_ERR_ARG;
}
if (!(pub_opt & op)) {
sr_err("Option '%s' not available to %s%s.", srci->id, opstr, suffix);
return SR_ERR_ARG;
}
return SR_OK;
}
/**
* Query value of a configuration key at the given driver or device instance.
*
@ -456,6 +507,9 @@ SR_API int sr_config_get(const struct sr_dev_driver *driver,
if (!driver->config_get)
return SR_ERR_ARG;
if (check_key(driver, sdi, cg, key, SR_CONF_GET) != SR_OK)
return SR_ERR_ARG;
if ((ret = driver->config_get(key, data, sdi, cg)) == SR_OK) {
/* Got a floating reference from the driver. Sink it here,
* caller will need to unref when done with it. */
@ -496,6 +550,8 @@ SR_API int sr_config_set(const struct sr_dev_inst *sdi,
ret = SR_ERR;
else if (!sdi->driver->config_set)
ret = SR_ERR_ARG;
else if (check_key(sdi->driver, sdi, cg, key, SR_CONF_SET) != SR_OK)
return SR_ERR_ARG;
else if ((ret = sr_variant_type_check(key, data)) == SR_OK)
ret = sdi->driver->config_set(key, data, sdi, cg);
@ -561,6 +617,10 @@ SR_API int sr_config_list(const struct sr_dev_driver *driver,
ret = SR_ERR;
else if (!driver->config_list)
ret = SR_ERR_ARG;
else if (key != SR_CONF_SCAN_OPTIONS && key != SR_CONF_DEVICE_OPTIONS) {
if (check_key(driver, sdi, cg, key, SR_CONF_LIST) != SR_OK)
return SR_ERR_ARG;
}
else if ((ret = driver->config_list(key, data, sdi, cg)) == SR_OK)
g_variant_ref_sink(*data);