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