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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <fcntl.h>
#include <pthread.h>
#include <net/if_arp.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/uio.h>
#include "triton.h"
#include "log.h"
#include "libnetlink.h"
#include "iplink.h"
#include "memdebug.h"
struct arg
{
iplink_list_func func;
void *arg;
};
static pthread_key_t rth_key;
static __thread struct rtnl_handle *rth;
static void open_rth(void)
{
rth = _malloc(sizeof(*rth));
if (!rth)
return;
memset(rth, 0, sizeof(*rth));
if (rtnl_open(rth, 0)) {
log_ppp_error("radius: cannot open rtnetlink\n");
_free(rth);
rth = NULL;
return;
}
pthread_setspecific(rth_key, rth);
}
static void free_rth(void *arg)
{
struct rtnl_handle *rth = arg;
rtnl_close(rth);
_free(rth);
}
static int store_nlmsg(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
{
struct ifinfomsg *ifi = NLMSG_DATA(n);
struct rtattr *tb[IFLA_MAX + 1];
struct arg *a = arg;
if (n->nlmsg_type != RTM_NEWLINK)
return 0;
if (n->nlmsg_len < NLMSG_LENGTH(sizeof(*ifi)))
return -1;
memset(tb, 0, sizeof(tb));
parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), IFLA_PAYLOAD(n));
if (tb[IFLA_IFNAME] == NULL)
return 0;
//printf("%i %s\n", ifi->ifi_index, RTA_DATA(tb[IFLA_IFNAME]));
return a->func(ifi->ifi_index, ifi->ifi_flags, RTA_DATA(tb[IFLA_IFNAME]), a->arg);
}
int __export iplink_list(iplink_list_func func, void *arg)
{
struct rtnl_handle rth;
struct arg a = { .func = func, .arg = arg };
if (rtnl_open(&rth, 0)) {
log_emerg("iplink: cannot open rtnetlink\n");
return -1;
}
if (rtnl_wilddump_request(&rth, AF_PACKET, RTM_GETLINK) < 0) {
log_emerg("iplink: cannot send dump request\n");
goto out_err;
}
if (rtnl_dump_filter(&rth, store_nlmsg, &a, NULL, NULL) < 0) {
log_emerg("iplink: dump terminated\n");
goto out_err;
}
rtnl_close(&rth);
return 0;
out_err:
rtnl_close(&rth);
return -1;
}
int __export iplink_get_stats(int ifindex, struct rtnl_link_stats *stats)
{
struct iplink_req {
struct nlmsghdr n;
struct ifinfomsg i;
char buf[4096];
} req;
struct ifinfomsg *ifi;
int len;
struct rtattr *tb[IFLA_MAX + 1];
if (!rth)
open_rth();
if (!rth)
return -1;
memset(&req, 0, sizeof(req) - 1024);
req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
req.n.nlmsg_type = RTM_GETLINK;
req.i.ifi_family = AF_PACKET;
req.i.ifi_index = ifindex;
if (rtnl_talk(rth, &req.n, 0, 0, &req.n, NULL, NULL, 0) < 0)
return -1;
if (req.n.nlmsg_type != RTM_NEWLINK)
return -1;
ifi = NLMSG_DATA(&req.n);
len = req.n.nlmsg_len;
len -= NLMSG_LENGTH(sizeof(*ifi));
if (len < 0)
return -1;
parse_rtattr(tb, IFLA_MAX, IFLA_RTA(ifi), len);
if (tb[IFLA_STATS])
memcpy(stats, RTA_DATA(tb[IFLA_STATS]), sizeof(*stats));
else
return -1;
return 0;
}
static void init(void)
{
pthread_key_create(&rth_key, free_rth);
}
DEFINE_INIT(100, init);
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