/******************************************************************
* change baudrate
******************************************************************/
static int writeBaudrate(
int action,
u_char *var_val,
u_char var_val_type,
size_t var_val_len,
u_char *statP,
oid *name,
size_t name_len
)
{
unsigned long value = *(unsigned long *)var_val;
DEBUGMSGTL(("aj_serial", "%s()\n", __FUNCTION__));
switch(action) {
case RESERVE1:
if(var_val_type != ASN_INTEGER) {
DEBUGMSGTL(("aj_serial", "%x net inter type", var_val_type));
return SNMP_ERR_WRONGTYPE;
}
if (var_val_len != sizeof(long)) {
DEBUGMSGTL(("aj_serial", "wrong length %x", var_val_len));
return SNMP_ERR_WRONGLENGTH;
}
if(!check_baudrate(value)) {
return SNMP_ERR_WRONGVALUE;
}
break;
case ACTION:
if(g_serial_setting.baudrate != value) {
g_serial_setting.baudrate = value;
g_save_flag = 1;
}
break;
case COMMIT:
if(g_save_flag) {
save_serial_config();
g_save_flag = 0;
}
break;
default:
break;
}
return SNMP_ERR_NOERROR;
}
/* open serial port
* returns the file descriptor on success or -1 on error */
int open_port(const char *pPort, int pBaud)
{
/* serial port file descriptor */
int fd = open(pPort, O_RDWR | O_NOCTTY | O_NDELAY);
if(fd == -1) {
msg_Err("Unable to open serial-port");
msg_Info("Retrying in 5 seconds...");
sleep(5);
fd = open(pPort, O_RDWR | O_NOCTTY | O_NDELAY);
}
if (fd == -1) {
die("Unable to open serial-port");
} else {
fcntl(fd, F_SETFL, 0);
struct termios options;
/* get the current options for the port */
tcgetattr(fd, &options);
check_baudrate(pBaud);
/* set baudrate */
cfsetispeed(&options, pBaud);
cfsetospeed(&options, pBaud);
/* enable the receiver and set local mode */
options.c_cflag |= (CLOCAL | CREAD);
/* set the new options for the port */
tcsetattr(fd, TCSANOW, &options);
msg_Dbg("BAUDRATE SET TO %i",pBaud);
}
return (fd);
}
/******************************************************************
* load serial setting
*****************************************************************/
static void load_serial_setting(void)
{
char buff[256];
FILE* fp = fopen(SERIAL_CONFIG_FILE, "r");
if(!fp) {
DEBUGMSGTL(("aj_serial", "init_serial_seting()\n"));
return;
}
/* get value from config file */
while(fgets(buff, sizeof(buff), fp)) {
const char* fmt = "%s %u";
char key[64];
unsigned long value;
if(sscanf(buff, fmt, key, &value) != 2) {
DEBUGMSGTL(("aj_serial", "format invalid %s\n", buff));
continue;
}
if(!strcmp(key, SOCK_PROTO_KEY_STR)) {
if(check_sock_proto(value)) {
g_sock_proto = value;
}
}
else if(!strcmp(key, CONNECT_ADDR_KEY_STR)) {
g_connect_addr = value;
}
else if(!strcmp(key, PORTNO_KEY_STR)) {
if(check_portno(value)) {
g_port_no = value;
} else {
g_port_no = DEFAULT_PORT_NO;
}
}
else if(!strcmp(key, BAUDRATE_KEY_STR)) {
if(check_baudrate(value)) {
g_serial_setting.baudrate = value;
}
}
else if(!strcmp(key, STOPBIT_KEY_STR)) {
if(check_stop_bit(value)) {
g_serial_setting.stop_bit = (stop_bit_e)value;
}
}
else if(!strcmp(key, PARITY_KEY_STR)) {
if(check_parity(value)) {
g_serial_setting.parity = (parity_e)value;
}
}
else if(!strcmp(key, FLOWCTRL_KEY_STR)) {
if(check_flow_ctrl(value)) {
g_serial_setting.flow_ctrl = (flow_ctrl_e)value;
}
}
else {
DEBUGMSGTL(("aj_serial", "invalid key %s\n", key));
}
}
fclose(fp);
return;
}