mono/utils/mono-networkinterfaces.c

   1 #include "config.h"
   2 #include "utils/mono-networkinterfaces.h"
   3
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <string.h>
   7
   8 /* FIXME: bsds untested */
   9
  10 /**
  11  * mono_networkinterface_list:
  12  * @size: a pointer to a location where the size of the returned array is stored
  13  *
  14  * Return an array of names for the interfaces currently on the system.
  15  * The size of the array is stored in @size.
  16  */
  17 gpointer*
  18 mono_networkinterface_list (int *size)
  19 {
  20         int i = 0, count = 0;
  21         void **nilist = NULL;
  22         char buf [512];
  23         FILE *f;
  24         char name [256];
  25
  26         f = fopen ("/proc/net/dev", "r");
  27         if (!f)
  28                 return NULL;
  29
  30         if (!fgets (buf, sizeof (buf) / sizeof (char), f))
  31                 goto out;
  32
  33         if (!fgets (buf, sizeof (buf) / sizeof (char), f))
  34                 goto out;
  35
  36         while (fgets (buf, sizeof (buf), f) != NULL) {
  37                 char *ptr;
  38                 buf [sizeof(buf) - 1] = 0;
  39                 if ((ptr = strchr (buf, ':')) == NULL || (*ptr++ = 0, sscanf (buf, "%s", name) != 1))
  40                         goto out;
  41
  42                 if (i >= count) {
  43                         if (!count)
  44                                 count = 16;
  45                         else
  46                                 count *= 2;
  47                 }
  48
  49                 nilist = g_realloc (nilist, count * sizeof (void*));
  50                 nilist [i++] = g_strdup (name);
  51         }
  52
  53  out:
  54         if (f) fclose(f);
  55         if (size)
  56                 *size = i;
  57
  58         if (!nilist)
  59                 nilist = g_malloc (sizeof (void*));
  60         nilist [i] = NULL;
  61         return nilist;
  62 }
  63
  64 /**
  65  * mono_network_get_data:
  66  * @name: name of the interface
  67  * @data: description of data to return
  68  *
  69  * Return a data item of a network adapter like bytes sent per sec, etc
  70  * according to the @data argumet.
  71  */
  72 gint64
  73 mono_network_get_data (char* name, MonoNetworkData data, MonoNetworkError *error)
  74 {
  75         gint64 val = 0;
  76         char buf [512];
  77         char cname [256];
  78         FILE *f;
  79
  80         unsigned long rx_bytes, rx_packets, rx_errs, rx_drops,
  81                 rx_fifo, rx_frame, tx_bytes, tx_packets, tx_errs, tx_drops,
  82                 tx_fifo, tx_colls, tx_carrier, rx_multi;
  83
  84         *error = MONO_NETWORK_ERROR_OTHER;
  85
  86         f = fopen ("/proc/net/dev", "r");
  87         if (!f)
  88                 return -1;
  89
  90         if (!fgets (buf, sizeof (buf) / sizeof (char), f))
  91                 goto out;
  92
  93         if (!fgets (buf, sizeof (buf) / sizeof (char), f))
  94                 goto out;
  95
  96         while (fgets (buf, sizeof (buf), f) != NULL) {
  97
  98                 char *ptr;
  99                 buf [sizeof (buf) - 1] = 0;
 100                 /* FIXME: This might potentially cause a buffer overflow for cname. */
 101                 if ((ptr = strchr (buf, ':')) == NULL ||
 102                                 (*ptr++ = 0, sscanf (buf, "%s", cname) != 1))
 103                         goto out;
 104
 105                 if (strcmp (name, cname) != 0) continue;
 106
 107                 if (sscanf (ptr, "%ld%ld%ld%ld%ld%ld%ld%*d%ld%ld%ld%ld%ld%ld%ld",
 108                                                          &rx_bytes, &rx_packets, &rx_errs, &rx_drops,
 109                                                          &rx_fifo, &rx_frame, &rx_multi,
 110                                                          &tx_bytes, &tx_packets, &tx_errs, &tx_drops,
 111                                                          &tx_fifo, &tx_colls, &tx_carrier) != 14)
 112                         goto out;
 113
 114                 switch (data) {
 115                 case MONO_NETWORK_BYTESSENT:
 116                         val = tx_bytes;
 117                         *error = MONO_NETWORK_ERROR_NONE;
 118                         goto out;
 119                 case MONO_NETWORK_BYTESREC:
 120                         val = rx_bytes;
 121                         *error = MONO_NETWORK_ERROR_NONE;
 122                         goto out;
 123                 case MONO_NETWORK_BYTESTOTAL:
 124                         val = rx_bytes + tx_bytes;
 125                         *error = MONO_NETWORK_ERROR_NONE;
 126                         goto out;
 127                 }
 128         }
 129
 130  out:
 131         if (f) fclose (f);
 132         return val;
 133 }
 134