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bbfdm: update get method for DHCPv4 RemainingLeasetime

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Mohd Mehdi 2024-05-01 08:37:23 +00:00 • committed by Mohd Husaam Mehdi
parent 2f1e39167f
commit 3d0a72a79a
1 changed files with 48 additions and 14 deletions
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62
libbbfdm/dmtree/tr181/dhcpv4.c
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@ -17,6 +17,7 @@
#define DHCP_OPTION_VENDORID 60
#define DHCP_OPTION_CLIENTID 61
#define DHCP_OPTION_HOSTNAME 12
#define DHCP_CLIENT_INFO "/tmp/dhcp_client_info"
struct dhcp_lease {
uint64_t ts;
@ -2631,27 +2632,60 @@ static int get_DHCPv4Client_DNSServers(char *refparam, struct dmctx *ctx, void *
return 0;
}
/* get remaining lease time for an interface */
static void get_lease_time_remaining(const char *ifname, char **value)
{
/* assume wrong unless we find appropriate value */
*value = "-1";
if (DM_STRLEN(ifname)) {
FILE *fp = fopen(DHCP_CLIENT_INFO, "r");
if (fp != NULL) {
char line[5120] = {0};
/* loop over lines, till we get our ifname */
while (fgets(line, sizeof(line), fp) != NULL) {
char *line_ifname = NULL;
char *lease_time = NULL;
char *lease_start_time = NULL;
char *spch = NULL;
/* delimiter is space */
/* get the first word, which is the ifname */
line_ifname = strtok_r(line, " ", &spch);
/* if it matches our interface, then get the leasetime and lease start time */
if (!DM_STRCMP(line_ifname, ifname)) {
lease_time = strtok_r(NULL, " ", &spch);
if (!DM_STRLEN(lease_time) || DM_STRTOL(lease_time) == 0xFFFFFFFF)
break;
lease_start_time = strtok_r(NULL, " ", &spch);
if (!DM_STRLEN(lease_start_time))
break;
char *uptime = get_uptime();
/* remaining = lease_time - (uptime - lease_start_time) */
dmasprintf(value, "%ld", DM_STRTOL(lease_time) - (DM_STRTOL(uptime) - DM_STRTOL(lease_start_time)));
break;
}
}
fclose(fp);
}
}
}
/*#Device.DHCPv4.Client.{i}.LeaseTimeRemaining!UBUS:network.interface/status/interface,@Name/data.leasetime*/
static int get_DHCPv4Client_LeaseTimeRemaining(char *refparam, struct dmctx *ctx, void *data, char *instance, char **value)
{
struct uci_section *dhcpv4_s = ((struct dhcp_client_args *)data)->iface_s;
if (dhcpv4_s) {
json_object *res = NULL;
char *if_name = section_name(dhcpv4_s);
dmubus_call("network.interface", "status", UBUS_ARGS{{"interface", if_name, String}}, 1, &res);
DM_ASSERT(res, *value = "0");
char *lease_time = dmjson_get_value(res, 2, "data", "leasetime");
char *uptime_str = dmjson_get_value(res, 2, "data", "uptime");
if (!DM_STRLEN(uptime_str) || !DM_STRLEN(lease_time) || DM_STRTOL(lease_time) == 0xFFFFFFFF) {
*value = "-1";
return 0;
}
char *uptime = get_uptime();
dmasprintf(value, "%ld", DM_STRTOL(lease_time) - (DM_STRTOL(uptime) - DM_STRTOL(uptime_str)));
/* get remaining lease time in value */
get_lease_time_remaining(if_name, value);
}
return 0;
}