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/*****************************************************************************
*
* init_osspecific()
*
* Init function
*
****************************************************************************/
void init_osspecific(netdata* data)
{
data->mib_name1[0] = CTL_NET;
data->mib_name1[1] = PF_ROUTE;
data->mib_name1[2] = 0;
data->mib_name1[3] = 0;
data->mib_name1[4] = NET_RT_IFLIST;
data->mib_name1[5] = 0;
data->mib_name2[0] = CTL_NET;
data->mib_name2[1] = PF_ROUTE;
data->mib_name2[2] = 0;
data->mib_name2[3] = 0;
data->mib_name2[4] = NET_RT_IFLIST;
data->mib_name2[5] = 0;
#ifdef DEBUG
fprintf( stderr, "The netload plugin was initialized for OpenBSD.\n" );
#endif
}
/*****************************************************************************
*
* checkinterface()
*
* check if a given interface exists, return TRUE if it does and FALSE if not
*
****************************************************************************/
int checkinterface(netdata* data)
{
int validinterface = FALSE;
char *lim, *next;
struct if_msghdr *ifm, *nextifm;
struct sockaddr_dl *sdl;
size_t needed;
char s[32];
if (sysctl(data->mib_name1, 6, NULL, &needed, NULL, 0) < 0)
return FALSE;
if (data->alloc1 < (signed long) needed)
{
if (data->buf1 != NULL)
free (data->buf1);
data->buf1 = malloc(needed);
if (data->buf1 == NULL)
return FALSE;
data->alloc1 = needed;
}
if (sysctl(data->mib_name1, 6, data->buf1, &needed, NULL, 0) < 0)
return FALSE;
lim = data->buf1 + needed;
next = data->buf1;
while ((next < lim) && (validinterface == 0))
{
ifm = (struct if_msghdr *)next;
if (ifm->ifm_type != RTM_IFINFO)
return FALSE;
next += ifm->ifm_msglen;
while (next < lim)
{
nextifm = (struct if_msghdr *)next;
if (nextifm->ifm_type != RTM_NEWADDR)
break;
next += nextifm->ifm_msglen;
}
if (ifm->ifm_flags & IFF_UP)
{
sdl = (struct sockaddr_dl *)(ifm + 1);
strncpy(s, sdl->sdl_data, sdl->sdl_nlen);
s[sdl->sdl_nlen] = '\0';
/* search for the right network interface */
if (sdl->sdl_family != AF_LINK)
continue;
if (strcmp(s, data->ifdata.if_name) != 0)
continue;
else
{
validinterface = TRUE;
break; /* stop searching */
}
}
}
return validinterface;
}
/*****************************************************************************
*
* get_stat()
*
* this code is based on gkrellm code (thanks guys!)
*
****************************************************************************/
int get_stat(netdata* data)
{
char *lim, *next;
struct if_msghdr *ifm, *nextifm;
struct sockaddr_dl *sdl;
char s[32];
size_t needed;
unsigned long rx_o, tx_o;
if (sysctl(data->mib_name2, 6, NULL, &needed, NULL, 0) < 0)
return 1;
if (data->alloc2 < (signed long) needed)
{
if (data->buf2 != NULL)
free (data->buf2);
data->buf2 = malloc(needed);
if (data->buf2 == NULL)
return 1;
data->alloc2 = needed;
}
if (sysctl(data->mib_name2, 6, data->buf2, &needed, NULL, 0) < 0)
return 1;
lim = data->buf2 + needed;
next = data->buf2;
while (next < lim)
{
ifm = (struct if_msghdr *)next;
if (ifm->ifm_type != RTM_IFINFO)
return 1;
next += ifm->ifm_msglen;
while (next < lim)
{
nextifm = (struct if_msghdr *)next;
if (nextifm->ifm_type != RTM_NEWADDR)
break;
next += nextifm->ifm_msglen;
}
if (ifm->ifm_flags & IFF_UP)
{
sdl = (struct sockaddr_dl *)(ifm + 1);
/* search for the right network interface */
if (sdl->sdl_family != AF_LINK)
continue;
strncpy(s, sdl->sdl_data, sdl->sdl_nlen);
s[sdl->sdl_nlen] = '\0';
if (strcmp(s, data->ifdata.if_name) != 0)
continue;
rx_o = data->stats.rx_bytes; tx_o = data->stats.tx_bytes;
/* write stats */
data->stats.tx_packets = ifm->ifm_data.ifi_opackets;
data->stats.rx_packets = ifm->ifm_data.ifi_ipackets;
data->stats.rx_bytes = ifm->ifm_data.ifi_ibytes;
data->stats.tx_bytes = ifm->ifm_data.ifi_obytes;
data->stats.rx_errors = ifm->ifm_data.ifi_ierrors;
data->stats.tx_errors = ifm->ifm_data.ifi_oerrors;
if (rx_o > data->stats.rx_bytes)
data->stats.rx_over++;
if (tx_o > data->stats.tx_bytes)
data->stats.tx_over++;
}
}
return 0;
}
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