153 lines
4.2 KiB
C
153 lines
4.2 KiB
C
/* $Id: openbsd.c,v 1.1 2003/08/24 20:01:48 bwalle Exp $ */
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/*****************************************************************************
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*
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* checkinterface()
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*
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* check if a given interface exists, return TRUE if it does and FALSE if not
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*
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****************************************************************************/
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int checkinterface()
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{
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int validinterface = FALSE;
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static int mib_name[] = { CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0 };
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static char *buf;
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static int alloc;
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char *lim, *next;
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struct if_msghdr *ifm, *nextifm;
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struct sockaddr_dl *sdl;
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size_t needed;
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char s[32];
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if (sysctl(mib_name, 6, NULL, &needed, NULL, 0) < 0)
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return FALSE;
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if (alloc < (signed long) needed)
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{
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if (buf != NULL)
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free (buf);
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buf = malloc(needed);
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if (buf == NULL)
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return FALSE;
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alloc = needed;
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}
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if (sysctl(mib_name, 6, buf, &needed, NULL, 0) < 0)
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return FALSE;
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lim = buf + needed;
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next = buf;
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while ((next < lim) && (validinterface == 0))
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{
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ifm = (struct if_msghdr *)next;
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if (ifm->ifm_type != RTM_IFINFO)
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return FALSE;
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next += ifm->ifm_msglen;
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while (next < lim)
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{
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nextifm = (struct if_msghdr *)next;
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if (nextifm->ifm_type != RTM_NEWADDR)
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break;
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next += nextifm->ifm_msglen;
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}
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if (ifm->ifm_flags & IFF_UP)
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{
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sdl = (struct sockaddr_dl *)(ifm + 1);
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strncpy(s, sdl->sdl_data, sdl->sdl_nlen);
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s[sdl->sdl_nlen] = '\0';
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/* search for the right network interface */
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if (sdl->sdl_family != AF_LINK)
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continue;
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if (strcmp(s, ifdata.if_name) != 0)
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continue;
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else
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{
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validinterface = TRUE;
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break; /* stop searching */
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}
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}
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}
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return validinterface;
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}
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/*****************************************************************************
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*
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* get_stat()
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*
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* this code is based on gkrellm code (thanks guys!)
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*
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****************************************************************************/
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int get_stat(void)
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{
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static int mib_name[] = { CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0 };
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static char *buf;
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static int alloc;
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char *lim, *next;
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struct if_msghdr *ifm, *nextifm;
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struct sockaddr_dl *sdl;
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char s[32];
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size_t needed;
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unsigned long rx_o, tx_o;
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if (sysctl(mib_name, 6, NULL, &needed, NULL, 0) < 0)
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return 1;
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if (alloc < (signed long) needed)
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{
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if (buf != NULL)
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free (buf);
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buf = malloc(needed);
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if (buf == NULL)
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return 1;
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alloc = needed;
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}
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if (sysctl(mib_name, 6, buf, &needed, NULL, 0) < 0)
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return 1;
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lim = buf + needed;
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next = buf;
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while (next < lim)
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{
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ifm = (struct if_msghdr *)next;
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if (ifm->ifm_type != RTM_IFINFO)
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return 1;
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next += ifm->ifm_msglen;
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while (next < lim)
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{
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nextifm = (struct if_msghdr *)next;
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if (nextifm->ifm_type != RTM_NEWADDR)
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break;
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next += nextifm->ifm_msglen;
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}
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if (ifm->ifm_flags & IFF_UP)
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{
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sdl = (struct sockaddr_dl *)(ifm + 1);
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/* search for the right network interface */
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if (sdl->sdl_family != AF_LINK)
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continue;
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if (strcmp(sdl->sdl_data, ifdata.if_name) != 0)
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continue;
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strncpy(s, sdl->sdl_data, sdl->sdl_nlen);
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s[sdl->sdl_nlen] = '\0';
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rx_o = stats.rx_bytes; tx_o = stats.tx_bytes;
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/* write stats */
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stats.tx_packets = ifm->ifm_data.ifi_opackets;
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stats.rx_packets = ifm->ifm_data.ifi_ipackets;
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stats.rx_bytes = ifm->ifm_data.ifi_ibytes;
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stats.tx_bytes = ifm->ifm_data.ifi_obytes;
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stats.rx_errors = ifm->ifm_data.ifi_ierrors;
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stats.tx_errors = ifm->ifm_data.ifi_oerrors;
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if (rx_o > stats.rx_bytes)
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stats.rx_over++;
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if (tx_o > stats.tx_bytes)
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stats.tx_over++;
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}
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}
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return 0;
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}
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