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Understand queue-ized ifnet structures.

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This commit is contained in:
Garrett Wollman 1996-12-11 20:39:43 +00:00
parent 294121822b
commit 0e27dc0563
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=20338
1 changed files with 14 additions and 5 deletions
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19
usr.bin/netstat/if.c
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@ -82,6 +82,7 @@ intpr(interval, ifnetaddr)
u_long ifnetaddr;
{
struct ifnet ifnet;
struct ifnethead ifnethead;
union {
struct ifaddr ifa;
struct in_ifaddr in;
@ -107,8 +108,12 @@ intpr(interval, ifnetaddr)
sidewaysintpr((unsigned)interval, ifnetaddr);
return;
}
if (kread(ifnetaddr, (char *)&ifnetaddr, sizeof ifnetaddr))
if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead))
return;
ifnetaddr = (u_long)ifnethead.tqh_first;
if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
return;
printf("%-5.5s %-5.5s %-13.13s %-15.15s %8.8s %5.5s",
"Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs");
if (bflag)
@ -134,7 +139,7 @@ intpr(interval, ifnetaddr)
kread((u_long)ifnet.if_name, tname, 16))
return;
tname[15] = '\0';
ifnetaddr = (u_long)ifnet.if_next;
ifnetaddr = (u_long)ifnet.if_link.tqe_next;
snprintf(name, 32, "%s%d", tname, ifnet.if_unit);
if (interface != 0 && (strcmp(name, interface) != 0))
continue;
@ -332,6 +337,7 @@ u_char signalled; /* set if alarm goes off "early" */
* Repeat display every interval seconds, showing statistics
* collected over that interval. Assumes that interval is non-zero.
* First line printed at top of screen is always cumulative.
* XXX - should be rewritten to use ifmib(4).
*/
static void
sidewaysintpr(interval, off)
@ -340,14 +346,17 @@ sidewaysintpr(interval, off)
{
struct ifnet ifnet;
u_long firstifnet;
struct ifnethead ifnethead;
register struct iftot *ip, *total;
register int line;
struct iftot *lastif, *sum, *interesting;
int oldmask, first;
u_long interesting_off;
if (kread(off, (char *)&firstifnet, sizeof (u_long)))
if (kread(off, (char *)&ifnethead, sizeof ifnethead))
return;
firstifnet = (u_long)ifnethead.tqh_first;
lastif = iftot;
sum = iftot + MAXIF - 1;
total = sum - 1;
@ -370,7 +379,7 @@ sidewaysintpr(interval, off)
ip++;
if (ip >= iftot + MAXIF - 2)
break;
off = (u_long) ifnet.if_next;
off = (u_long) ifnet.if_link.tqe_next;
}
lastif = ip;
@ -448,7 +457,7 @@ sidewaysintpr(interval, off)
sum->ift_ob += ifnet.if_obytes;
sum->ift_co += ifnet.if_collisions;
sum->ift_dr += ifnet.if_snd.ifq_drops;
off = (u_long) ifnet.if_next;
off = (u_long) ifnet.if_link.tqe_next;
}
if (!first) {
printf("%10u %5u %10u %10u %5u %10u %5u",