125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
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/* $Id: freebsd.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 and is up.
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* return TRUE if it does and FALSE if not
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*
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****************************************************************************/
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int checkinterface(void)
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{
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int validinterface = FALSE;
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int i, num_iface;
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size_t len;
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int name[6];
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struct ifmibdata ifmd;
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len = sizeof(num_iface);
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sysctlbyname("net.link.generic.system.ifcount", &num_iface, &len, NULL, 0);
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for (i=1; i <= num_iface; i++)
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{
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name[0] = CTL_NET;
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name[1] = PF_LINK;
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name[2] = NETLINK_GENERIC;
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name[3] = IFMIB_IFDATA;
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name[4] = i;
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name[5] = IFDATA_GENERAL;
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len = sizeof(ifmd);
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sysctl(name, 6, &ifmd, &len, NULL, 0);
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if (strcmp(ifmd.ifmd_name, (char *)ifdata.if_name) == 0)
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{
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/*
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* now we have an interface and just have to see if it's up
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* in case we just want to debug media types we disable
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* IFF_UP flags
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*/
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#ifndef MEDIADEBUG
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if (ifmd.ifmd_flags & IFF_UP)
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#endif
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validinterface = TRUE;
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break; /* in any case we can stop searching here */
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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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* use sysctl() to read the statistics and fill statistics struct
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*
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****************************************************************************/
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int get_stat(void)
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{
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/*
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* use sysctl() to get the right interface number if !dev_opened
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* then read the data directly from the ifmd_data struct
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*/
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static int watchif = -1;
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int i, num_iface;
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size_t len;
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int name[6];
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struct ifmibdata ifmd;
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static int dev_opened = 0;
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unsigned long rx_o, tx_o;
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if (!dev_opened)
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{
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len = sizeof(num_iface);
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sysctlbyname("net.link.generic.system.ifcount", &num_iface, &len,
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NULL, 0);
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for (i=1; i <= num_iface; i++)
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{
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name[0] = CTL_NET;
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name[1] = PF_LINK;
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name[2] = NETLINK_GENERIC;
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name[3] = IFMIB_IFDATA;
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name[4] = i;
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name[5] = IFDATA_GENERAL;
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len = sizeof(ifmd);
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sysctl(name, 6, &ifmd, &len, NULL, 0);
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if (strcmp(ifmd.ifmd_name, (char *)ifdata.if_name) == 0)
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{
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/* got the right interface */
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watchif = i;
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dev_opened++;
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}
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}
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}
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/* in any case read the struct and record statistics */
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name[0] = CTL_NET;
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name[1] = PF_LINK;
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name[2] = NETLINK_GENERIC;
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name[3] = IFMIB_IFDATA;
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name[4] = watchif;
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name[5] = IFDATA_GENERAL;
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len = sizeof(ifmd);
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sysctl(name, 6, &ifmd, &len, NULL, 0);
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rx_o = stats.rx_bytes; tx_o = stats.tx_bytes;
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stats.tx_packets = ifmd.ifmd_data.ifi_opackets;
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stats.rx_packets = ifmd.ifmd_data.ifi_ipackets;
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stats.rx_bytes = ifmd.ifmd_data.ifi_ibytes;
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stats.tx_bytes = ifmd.ifmd_data.ifi_obytes;
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stats.rx_errors = ifmd.ifmd_data.ifi_ierrors;
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stats.tx_errors = ifmd.ifmd_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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return (0);
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}
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