| 1 | /* |
|---|
| 2 | * $Source: /afs/dev.mit.edu/source/repository/athena/bin/mon/netif.c,v $ |
|---|
| 3 | * $Author: dgg $ |
|---|
| 4 | * $Locker: $ |
|---|
| 5 | * $Header: /afs/dev.mit.edu/source/repository/athena/bin/mon/netif.c,v 1.1 1984-12-13 12:01:10 dgg Exp $ |
|---|
| 6 | */ |
|---|
| 7 | |
|---|
| 8 | #ifndef lint |
|---|
| 9 | static char *rcsid_netif_c = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/mon/netif.c,v 1.1 1984-12-13 12:01:10 dgg Exp $"; |
|---|
| 10 | #endif lint |
|---|
| 11 | |
|---|
| 12 | /* |
|---|
| 13 | * N E T I F . C |
|---|
| 14 | * |
|---|
| 15 | * This section of mon handles the network interfaces. |
|---|
| 16 | * |
|---|
| 17 | * nifinit() initializes "static" info on interfaces. |
|---|
| 18 | * nifupdate() gets "dynamic" info on net interfaces. |
|---|
| 19 | */ |
|---|
| 20 | #include "mon.h" |
|---|
| 21 | #include <sys/socket.h> |
|---|
| 22 | #include <net/if.h> |
|---|
| 23 | #include <netinet/in.h> |
|---|
| 24 | |
|---|
| 25 | char *index(); |
|---|
| 26 | |
|---|
| 27 | /* |
|---|
| 28 | * NIFINIT - initialize the static network interfaces info such |
|---|
| 29 | * as device names, addresses, etc. Also calls nifupdate() once |
|---|
| 30 | * to set up initial values for data with running totals. |
|---|
| 31 | */ |
|---|
| 32 | nifinit() |
|---|
| 33 | { |
|---|
| 34 | off_t firstifnet; /* offset to first ifnet struct */ |
|---|
| 35 | off_t ifnetp; /* points to ifnet struct in kmem */ |
|---|
| 36 | struct ifnet ifnet; |
|---|
| 37 | struct nifinfo *nifip; |
|---|
| 38 | |
|---|
| 39 | /* check for valid kernal offset */ |
|---|
| 40 | if (namelist[N_IFNET].n_type == NULL) { |
|---|
| 41 | fprintf(stderr, "mon: ifnet symbol not defined!\n"); |
|---|
| 42 | return; |
|---|
| 43 | } |
|---|
| 44 | |
|---|
| 45 | /* get starting address of ifnet structure chain */ |
|---|
| 46 | lseek(kmem, namelist[N_IFNET].n_value, 0); |
|---|
| 47 | read(kmem, &firstifnet, sizeof(firstifnet)); |
|---|
| 48 | |
|---|
| 49 | /* get info for each interface in chain */ |
|---|
| 50 | numif = 0; /* count number of interfaces */ |
|---|
| 51 | ifnetp = firstifnet; |
|---|
| 52 | nifip = &nifinfo[0]; |
|---|
| 53 | while (ifnetp) { |
|---|
| 54 | char *cp; |
|---|
| 55 | |
|---|
| 56 | numif++; |
|---|
| 57 | /* get an ifnet entry */ |
|---|
| 58 | lseek(kmem, (long)ifnetp, 0); |
|---|
| 59 | read(kmem, &ifnet, sizeof(ifnet)); |
|---|
| 60 | |
|---|
| 61 | /* build its interface name */ |
|---|
| 62 | lseek(kmem, (long)ifnet.if_name, 0); |
|---|
| 63 | read(kmem, nifip->name, 15); |
|---|
| 64 | nifip->name[15] = '\0'; |
|---|
| 65 | cp = index(nifip->name, '\0'); |
|---|
| 66 | sprintf(cp, "%d", ifnet.if_unit); |
|---|
| 67 | |
|---|
| 68 | /* other info comes here */ |
|---|
| 69 | |
|---|
| 70 | if (++nifip >= &nifinfo[MAXIF]) |
|---|
| 71 | break; /* no more room for interfaces */ |
|---|
| 72 | |
|---|
| 73 | ifnetp = (off_t)ifnet.if_next; /* link to next ifnet struct */ |
|---|
| 74 | } |
|---|
| 75 | |
|---|
| 76 | nifupdate(); /* init running totals */ |
|---|
| 77 | } |
|---|
| 78 | |
|---|
| 79 | /* |
|---|
| 80 | * NIFUPDATE - gets the "dynamic" info about the network interfaces. |
|---|
| 81 | */ |
|---|
| 82 | nifupdate() |
|---|
| 83 | { |
|---|
| 84 | off_t ifnetp; /* pointer to ifnet struct in kmem */ |
|---|
| 85 | struct ifnet ifnet; |
|---|
| 86 | int i; |
|---|
| 87 | |
|---|
| 88 | if (namelist[N_IFNET].n_type == NULL) |
|---|
| 89 | return; /* no net interfaces */ |
|---|
| 90 | |
|---|
| 91 | /* get info from ifnet struct chain */ |
|---|
| 92 | lseek(kmem, namelist[N_IFNET].n_value, 0); |
|---|
| 93 | read(kmem, &ifnetp, sizeof(ifnetp)); |
|---|
| 94 | i = 0; |
|---|
| 95 | while (ifnetp) { |
|---|
| 96 | lseek(kmem, (long)ifnetp, 0); |
|---|
| 97 | read (kmem, &ifnet, sizeof(ifnet)); |
|---|
| 98 | |
|---|
| 99 | /* extract interval data from ifnet and update totals */ |
|---|
| 100 | nifdat[i].ipackets = ifnet.if_ipackets - niftot[i].ipackets; |
|---|
| 101 | niftot[i].ipackets = ifnet.if_ipackets; |
|---|
| 102 | nifdat[i].ierrors = ifnet.if_ierrors - niftot[i].ierrors; |
|---|
| 103 | niftot[i].ierrors = ifnet.if_ierrors; |
|---|
| 104 | nifdat[i].opackets = ifnet.if_opackets - niftot[i].opackets; |
|---|
| 105 | niftot[i].opackets = ifnet.if_opackets; |
|---|
| 106 | nifdat[i].oerrors = ifnet.if_oerrors - niftot[i].oerrors; |
|---|
| 107 | niftot[i].oerrors = ifnet.if_oerrors; |
|---|
| 108 | nifdat[i].collisions = ifnet.if_collisions - niftot[i].collisions; |
|---|
| 109 | niftot[i].collisions = ifnet.if_collisions; |
|---|
| 110 | /* extract nifinfo (other stuff) data from ifnet */ |
|---|
| 111 | /* OTHER STUFF OF INTEREST HERE */ |
|---|
| 112 | nifinfo[i].outqlen = ifnet.if_snd.ifq_len; |
|---|
| 113 | |
|---|
| 114 | if (++i >= MAXIF) |
|---|
| 115 | break; /* no more room for interfaces */ |
|---|
| 116 | |
|---|
| 117 | ifnetp = (off_t)ifnet.if_next; /* link to next ifnet struct */ |
|---|
| 118 | } |
|---|
| 119 | } |
|---|
