static int hs20_add_nai_home_realm_matches(struct hostapd_data *hapd,
struct wpabuf *buf,
const u8 *home_realm,
size_t home_realm_len)
{
unsigned int i, j, k;
u8 num_realms, num_matching = 0, encoding, realm_len, *realm_list_len;
struct hostapd_nai_realm_data *realm;
const u8 *pos, *realm_name, *end;
struct {
unsigned int realm_data_idx;
unsigned int realm_idx;
} matches[10];
pos = home_realm;
end = pos + home_realm_len;
if (pos + 1 > end) {
wpa_hexdump(MSG_DEBUG, "Too short NAI Home Realm Query",
home_realm, home_realm_len);
return -1;
}
num_realms = *pos++;
for (i = 0; i < num_realms && num_matching < 10; i++) {
if (pos + 2 > end) {
wpa_hexdump(MSG_DEBUG,
"Truncated NAI Home Realm Query",
home_realm, home_realm_len);
return -1;
}
encoding = *pos++;
realm_len = *pos++;
if (pos + realm_len > end) {
wpa_hexdump(MSG_DEBUG,
"Truncated NAI Home Realm Query",
home_realm, home_realm_len);
return -1;
}
realm_name = pos;
for (j = 0; j < hapd->conf->nai_realm_count &&
num_matching < 10; j++) {
const u8 *rpos, *rend;
realm = &hapd->conf->nai_realm_data[j];
if (encoding != realm->encoding)
continue;
rpos = realm_name;
while (rpos < realm_name + realm_len &&
num_matching < 10) {
for (rend = rpos;
rend < realm_name + realm_len; rend++) {
if (*rend == ';')
break;
}
for (k = 0; k < MAX_NAI_REALMS &&
realm->realm[k] &&
num_matching < 10; k++) {
if ((int) os_strlen(realm->realm[k]) !=
rend - rpos ||
os_strncmp((char *) rpos,
realm->realm[k],
rend - rpos) != 0)
continue;
matches[num_matching].realm_data_idx =
j;
matches[num_matching].realm_idx = k;
num_matching++;
}
rpos = rend + 1;
}
}
pos += realm_len;
}
realm_list_len = gas_anqp_add_element(buf, ANQP_NAI_REALM);
wpabuf_put_le16(buf, num_matching);
/*
* There are two ways to format. 1. each realm in a NAI Realm Data unit
* 2. all realms that share the same EAP methods in a NAI Realm Data
* unit. The first format is likely to be bigger in size than the
* second, but may be easier to parse and process by the receiver.
*/
for (i = 0; i < num_matching; i++) {
wpa_printf(MSG_DEBUG, "realm_idx %d, realm_data_idx %d",
matches[i].realm_data_idx, matches[i].realm_idx);
realm = &hapd->conf->nai_realm_data[matches[i].realm_data_idx];
anqp_add_nai_realm_data(buf, realm, matches[i].realm_idx);
}
gas_anqp_set_element_len(buf, realm_list_len);
return 0;
}
static int process_hs_nai_home_realm(struct hostapd_data *hapd,
struct wpabuf *buf,
struct anqp_query_info *qi)
{
unsigned int i, j, k;
u8 num_realms, num_matching = 0, encoding, realm_len, *realm_list_len;
struct hostapd_nai_realm_data *realm;
const u8 *pos, *realm_name, *end;
struct {
unsigned int realm_data_idx;
unsigned int realm_idx;
} matches[10];
pos = qi->param;
end = pos + qi->param_arg;
num_realms = *pos++;
for (i = 0; i < num_realms && num_matching < 10; i++) {
encoding = *pos++;
realm_len = *pos++;
realm_name = pos;
for (j = 0; j < hapd->conf->nai_realm_count &&
num_matching < 10; j++) {
realm = &hapd->conf->nai_realm_data[j];
if (encoding != realm->encoding)
continue;
for (k = 0; realm->realm[k] && num_matching < 10; k++)
{
if (os_strncmp((char *) realm_name,
realm->realm[k], realm_len) !=
0)
continue;
matches[num_matching].realm_data_idx = j;
matches[num_matching].realm_idx = k;
num_matching++;
}
}
pos += realm_len;
if (pos > end) {
wpa_hexdump(MSG_ERROR, "NAI Home Realm processing "
"error", qi->param, qi->param_arg);
return -1;
}
}
realm_list_len = gas_anqp_add_element(buf, ANQP_NAI_REALM);
wpabuf_put_le16(buf, num_matching);
/*
* There are two ways to format. 1. each realm in a NAI Realm Data unit
* 2. all realms that share the same EAP methods in a NAI Realm Data
* unit. The first format is likely to be bigger in size than the
* second, but may be easier to parse and process by the receiver.
*/
for (i = 0; i < num_matching; i++) {
wpa_printf(MSG_DEBUG, "realm_idx %d, realm_data_idx %d",
matches[i].realm_data_idx, matches[i].realm_idx);
realm = &hapd->conf->nai_realm_data[matches[i].realm_data_idx];
anqp_add_nai_realm_data(buf, realm, matches[i].realm_idx);
}
gas_anqp_set_element_len(buf, realm_list_len);
return 0;
}
