int btd_event_request_pin(bdaddr_t *sba, bdaddr_t *dba)
{
struct btd_adapter *adapter;
struct btd_device *device;
char pin[17];
int pinlen;
if (!get_adapter_and_device(sba, dba, &adapter, &device, TRUE))
return -ENODEV;
/* Check if the adapter is not pairable and if there isn't a bonding in
* progress */
if (!adapter_is_pairable(adapter) && !device_is_bonding(device, NULL))
return -EPERM;
memset(pin, 0, sizeof(pin));
pinlen = read_pin_code(sba, dba, pin);
if (pinlen > 0) {
btd_adapter_pincode_reply(adapter, dba, pin);
return 0;
}
return device_request_authentication(device, AUTH_TYPE_PINCODE, 0,
pincode_cb);
}
int btd_event_request_pin(bdaddr_t *sba, bdaddr_t *dba)
{
struct btd_adapter *adapter;
struct btd_device *device;
char pin[17];
int pinlen;
if (!get_adapter_and_device(sba, dba, &adapter, &device, TRUE))
return -ENODEV;
memset(pin, 0, sizeof(pin));
pinlen = read_pin_code(sba, dba, pin);
if (pinlen > 0) {
btd_adapter_pincode_reply(adapter, dba, pin, pinlen);
return 0;
}
return device_request_authentication(device, AUTH_TYPE_PINCODE, 0,
pincode_cb);
}
/*
PIN helper is an external app that asks user for a PIN. It can
implement its own PIN code generation policy and methods like
PIN look up in some database, etc.
HCId expects following output from PIN helper:
PIN:12345678 - PIN code
ERR - No PIN available
*/
static void call_pin_helper(int dev, bdaddr_t *sba, struct hci_conn_info *ci)
{
pin_code_reply_cp pr;
struct sigaction sa;
char addr[18], str[512], *pin, name[249], tmp[497], *ptr;
FILE *pipe;
int i, ret, len;
/* Run PIN helper in the separate process */
#ifdef __uClinux__
switch (vfork()) {
#else
switch (fork()) {
#endif
case 0:
break;
case -1:
syslog(LOG_ERR, "Can't fork PIN helper: %s (%d)",
strerror(errno), errno);
default:
return;
}
if (access(hcid.pin_helper, R_OK | X_OK)) {
syslog(LOG_ERR, "Can't exec PIN helper %s: %s (%d)",
hcid.pin_helper, strerror(errno), errno);
goto reject;
}
memset(name, 0, sizeof(name));
read_device_name(sba, &ci->bdaddr, name);
//hci_remote_name(dev, &ci->bdaddr, sizeof(name), name, 0);
memset(tmp, 0, sizeof(tmp));
ptr = tmp;
for (i = 0; i < 248 && name[i]; i++)
if (isprint(name[i])) {
switch (name[i]) {
case '"':
case '`':
case '$':
case '|':
case '>':
case '<':
case '&':
case ';':
case '\\':
*ptr++ = '\\';
}
*ptr++ = name[i];
} else {
name[i] = '.';
*ptr++ = '.';
}
ba2str(&ci->bdaddr, addr);
snprintf(str, sizeof(str), "%s %s %s \"%s\"", hcid.pin_helper,
ci->out ? "out" : "in", addr, tmp);
setenv("PATH", "/bin:/usr/bin:/usr/local/bin", 1);
memset(&sa, 0, sizeof(sa));
sa.sa_flags = SA_NOCLDSTOP;
sa.sa_handler = SIG_DFL;
sigaction(SIGCHLD, &sa, NULL);
pipe = popen(str, "r");
if (!pipe) {
syslog(LOG_ERR, "Can't exec PIN helper: %s (%d)",
strerror(errno), errno);
goto reject;
}
pin = fgets(str, sizeof(str), pipe);
ret = pclose(pipe);
if (!pin || strlen(pin) < 5)
goto nopin;
strtok(pin, "\n\r");
if (strncmp("PIN:", pin, 4))
goto nopin;
pin += 4;
len = strlen(pin);
memset(&pr, 0, sizeof(pr));
bacpy(&pr.bdaddr, &ci->bdaddr);
memcpy(pr.pin_code, pin, len);
pr.pin_len = len;
hci_send_cmd(dev, OGF_LINK_CTL, OCF_PIN_CODE_REPLY,
PIN_CODE_REPLY_CP_SIZE, &pr);
#ifdef __uClinux__
_exit(0);
#else
exit(0);
#endif
nopin:
if (!pin || strncmp("ERR", pin, 3))
syslog(LOG_ERR, "PIN helper exited abnormally with code %d", ret);
reject:
hci_send_cmd(dev, OGF_LINK_CTL, OCF_PIN_CODE_NEG_REPLY, 6, &ci->bdaddr);
#ifdef __uClinux__
_exit(0);
#else
exit(0);
#endif
}
static void request_pin(int dev, bdaddr_t *sba, struct hci_conn_info *ci)
{
#ifdef ENABLE_DBUS
if (hcid.dbus_pin_helper) {
hcid_dbus_request_pin(dev, ci);
return;
}
#endif
call_pin_helper(dev, sba, ci);
}
static void pin_code_request(int dev, bdaddr_t *sba, bdaddr_t *dba)
{
pin_code_reply_cp pr;
struct hci_conn_info_req *cr;
struct hci_conn_info *ci;
char sa[18], da[18], pin[17];
int pinlen;
memset(&pr, 0, sizeof(pr));
bacpy(&pr.bdaddr, dba);
ba2str(sba, sa); ba2str(dba, da);
syslog(LOG_INFO, "pin_code_request (sba=%s, dba=%s)", sa, da);
cr = malloc(sizeof(*cr) + sizeof(*ci));
if (!cr)
return;
bacpy(&cr->bdaddr, dba);
cr->type = ACL_LINK;
if (ioctl(dev, HCIGETCONNINFO, (unsigned long) cr) < 0) {
syslog(LOG_ERR, "Can't get conn info: %s (%d)",
strerror(errno), errno);
goto reject;
}
ci = cr->conn_info;
memset(pin, 0, sizeof(pin));
pinlen = read_pin_code(sba, dba, pin);
if (pairing == HCID_PAIRING_ONCE) {
struct link_key *key = get_link_key(sba, dba);
if (key) {
ba2str(dba, da);
syslog(LOG_WARNING, "PIN code request for already paired device %s", da);
goto reject;
}
} else if (pairing == HCID_PAIRING_NONE)
goto reject;
if (hcid.security == HCID_SEC_AUTO) {
if (!ci->out) {
/* Incomming connection */
memcpy(pr.pin_code, hcid.pin_code, hcid.pin_len);
pr.pin_len = hcid.pin_len;
hci_send_cmd(dev, OGF_LINK_CTL, OCF_PIN_CODE_REPLY,
PIN_CODE_REPLY_CP_SIZE, &pr);
} else {
/* Outgoing connection */
if (pinlen > 0) {
memcpy(pr.pin_code, pin, pinlen);
pr.pin_len = pinlen;
hci_send_cmd(dev, OGF_LINK_CTL, OCF_PIN_CODE_REPLY,
PIN_CODE_REPLY_CP_SIZE, &pr);
} else {
/* Let PIN helper handle that */
request_pin(dev, sba, ci);
}
}
} else {
/* Let PIN helper handle that */
request_pin(dev, sba, ci);
}
free(cr);
return;
reject:
hci_send_cmd(dev, OGF_LINK_CTL, OCF_PIN_CODE_NEG_REPLY, 6, dba);
free(cr);
return;
}
