a5dd7e9063
It changes the return values of all sysdeps functions which were previosly returning void to int. This is the first step to implement better error handling in LibGTop. Martin 1999-10-24 Martin Baulig <martin@home-of-linux.org> * include/glibtop/*.h (glibtop_get_*, glibtop_init*): Changed the return value of all `glibtop_get_<feature>_* ()' and all `glibtop_init_<feature>_* ()' functions from void to int. * features.def: Reflect changes of the return values. * sysdeps/*/*.c: Reflect changes of the return values.
352 lines
8.7 KiB
C
352 lines
8.7 KiB
C
/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, October 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <glibtop.h>
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#include <glibtop/error.h>
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#include <glibtop/netload.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/ioctl.h>
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#if !defined (_LIBC) && defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
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/* GNU LibC */
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#include <net/if.h>
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#include <netinet/ip_icmp.h>
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#include <netinet/in.h>
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#include <netinet/ip.h>
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#include <netinet/tcp.h>
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#include <netinet/udp.h>
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#include <net/if.h>
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#else /* Libc 5 */
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#include <linux/if.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/icmp.h>
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#include <linux/tcp.h>
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#include <linux/udp.h>
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#endif
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#define _GLIBTOP_IP_FW_ACCTIN 0x1000 /* Account incoming packets only. */
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#define _GLIBTOP_IP_FW_ACCTOUT 0x2000 /* Account outgoing packets only. */
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static const unsigned long _glibtop_sysdeps_netload =
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(1L << GLIBTOP_NETLOAD_ERRORS_IN) +
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(1L << GLIBTOP_NETLOAD_ERRORS_OUT) +
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(1L << GLIBTOP_NETLOAD_COLLISIONS);
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static const unsigned long _glibtop_sysdeps_netload_data =
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(1L << GLIBTOP_NETLOAD_ADDRESS) +
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(1L << GLIBTOP_NETLOAD_SUBNET) +
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(1L << GLIBTOP_NETLOAD_MTU);
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static const unsigned long _glibtop_sysdeps_netload_bytes =
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(1L << GLIBTOP_NETLOAD_BYTES_IN) +
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(1L << GLIBTOP_NETLOAD_BYTES_OUT) +
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(1L << GLIBTOP_NETLOAD_BYTES_TOTAL);
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static const unsigned long _glibtop_sysdeps_netload_packets =
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(1L << GLIBTOP_NETLOAD_PACKETS_IN) +
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(1L << GLIBTOP_NETLOAD_PACKETS_OUT) +
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(1L << GLIBTOP_NETLOAD_PACKETS_TOTAL);
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static const unsigned long _glibtop_sysdeps_netload_total =
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(1L << GLIBTOP_NETLOAD_PACKETS_TOTAL) +
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(1L << GLIBTOP_NETLOAD_BYTES_TOTAL);
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static const unsigned long _glibtop_sysdeps_netload_in =
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(1L << GLIBTOP_NETLOAD_PACKETS_TOTAL) +
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(1L << GLIBTOP_NETLOAD_BYTES_TOTAL) +
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(1L << GLIBTOP_NETLOAD_PACKETS_IN) +
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(1L << GLIBTOP_NETLOAD_BYTES_IN);
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static const unsigned long _glibtop_sysdeps_netload_out =
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(1L << GLIBTOP_NETLOAD_PACKETS_TOTAL) +
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(1L << GLIBTOP_NETLOAD_BYTES_TOTAL) +
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(1L << GLIBTOP_NETLOAD_PACKETS_OUT) +
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(1L << GLIBTOP_NETLOAD_BYTES_OUT);
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/* Init function. */
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int
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glibtop_init_netload_s (glibtop *server)
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{
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server->sysdeps.netload = _glibtop_sysdeps_netload |
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_glibtop_sysdeps_netload_data |
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_glibtop_sysdeps_netload_bytes |
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_glibtop_sysdeps_netload_packets;
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}
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/* Provides network statistics. */
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int
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glibtop_get_netload_s (glibtop *server, glibtop_netload *buf,
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const char *interface)
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{
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char buffer [BUFSIZ], *p;
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int have_bytes, fields, skfd;
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FILE *f;
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memset (buf, 0, sizeof (glibtop_netload));
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skfd = socket (AF_INET, SOCK_DGRAM, 0);
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if (skfd) {
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struct ifreq ifr;
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unsigned flags;
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strcpy (ifr.ifr_name, interface);
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if (!ioctl (skfd, SIOCGIFFLAGS, &ifr)) {
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buf->flags |= (1L << GLIBTOP_NETLOAD_IF_FLAGS);
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flags = ifr.ifr_flags;
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} else
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flags = 0;
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if (flags & IFF_UP)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_UP);
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if (flags & IFF_BROADCAST)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_BROADCAST);
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if (flags & IFF_DEBUG)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_DEBUG);
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if (flags & IFF_LOOPBACK)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_LOOPBACK);
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if (flags & IFF_POINTOPOINT)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_POINTOPOINT);
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if (flags & IFF_RUNNING)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_RUNNING);
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if (flags & IFF_NOARP)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_NOARP);
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if (flags & IFF_PROMISC)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_PROMISC);
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if (flags & IFF_ALLMULTI)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_ALLMULTI);
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if (flags & IFF_MULTICAST)
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buf->if_flags |= (1L << GLIBTOP_IF_FLAGS_MULTICAST);
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strcpy (ifr.ifr_name, interface);
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if (!ioctl (skfd, SIOCGIFADDR, &ifr)) {
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struct sockaddr_in addr =
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*(struct sockaddr_in *) &ifr.ifr_addr;
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buf->address = addr.sin_addr.s_addr;
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buf->flags |= (1L << GLIBTOP_NETLOAD_ADDRESS);
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}
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strcpy (ifr.ifr_name, interface);
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if (!ioctl (skfd, SIOCGIFNETMASK, &ifr)) {
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struct sockaddr_in addr =
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*(struct sockaddr_in *) &ifr.ifr_addr;
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buf->subnet = addr.sin_addr.s_addr;
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buf->flags |= (1L << GLIBTOP_NETLOAD_SUBNET);
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}
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strcpy (ifr.ifr_name, interface);
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if (!ioctl (skfd, SIOCGIFMTU, &ifr)) {
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buf->mtu = ifr.ifr_mtu;
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buf->flags |= (1L << GLIBTOP_NETLOAD_MTU);
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}
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close (skfd);
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}
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/* Linux 2.1.114 - don't know where exactly this was added, but
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* recent kernels have byte count in /proc/net/dev so we don't
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* need IP accounting.
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*/
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if (server->os_version_code < 131442) {
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/* If IP accounting is enabled in the kernel and it is
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* enabled for the requested interface, we use it to
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* get the data. In this case, we don't use /proc/net/dev
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* to get errors and collisions.
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*/
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f = fopen ("/proc/net/ip_acct", "r");
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if (f) {
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int success = 0;
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/* Skip over the header line. */
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fgets (buffer, BUFSIZ-1, f);
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while (fgets (buffer, BUFSIZ-1, f)) {
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unsigned long flags, packets, bytes;
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char *p, *dev;
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/* Skip over the network thing. */
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dev = skip_token (buffer) + 1;
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p = skip_token (dev);
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*p++ = 0;
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if (strcmp (dev, interface))
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continue;
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success = 1;
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p = skip_token (p);
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flags = strtoul (p, &p, 16);
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p = skip_multiple_token (p, 2);
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packets = strtoul (p, &p, 0);
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bytes = strtoul (p, &p, 0);
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if (flags & _GLIBTOP_IP_FW_ACCTIN) {
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/* Incoming packets only. */
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buf->packets_total += packets;
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buf->packets_in += packets;
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buf->bytes_total += bytes;
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buf->bytes_in += bytes;
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buf->flags |= _glibtop_sysdeps_netload_in;
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} else if (flags & _GLIBTOP_IP_FW_ACCTOUT) {
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/* Outgoing packets only. */
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buf->packets_total += packets;
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buf->packets_out += packets;
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buf->bytes_total += bytes;
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buf->bytes_out += bytes;
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buf->flags |= _glibtop_sysdeps_netload_out;
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} else {
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/* Only have total values. */
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buf->packets_total += packets;
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buf->bytes_total += bytes;
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buf->flags |= _glibtop_sysdeps_netload_total;
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}
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}
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fclose (f);
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if (success) return;
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}
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}
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/* Ok, either IP accounting is not enabled in the kernel or
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* it was not enabled for the requested interface. */
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f = fopen ("/proc/net/dev", "r");
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if (!f) return;
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/* Skip over the header line. */
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fgets (buffer, BUFSIZ-1, f);
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fgets (buffer, BUFSIZ-1, f);
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/* Starting with 2.1.xx (don't know exactly which version)
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* /proc/net/dev contains both byte and package counters. */
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p = strchr (buffer, '|');
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if (!p) {
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fclose (f);
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return;
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}
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/* Do we already have byte counters ? */
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have_bytes = strncmp (++p, "bytes", 5) == 0;
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/* Count remaining 'Receive' fields so we know where
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* the first 'Transmit' field starts. */
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fields = 0;
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while (*p != '|') {
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if (!isspace (*p++)) continue;
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while (isspace (*p++)) ;
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fields++;
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}
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/* Should never happen. */
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if (fields < 2) return;
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fields--;
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while (fgets (buffer, BUFSIZ-1, f)) {
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char *p, *dev;
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dev = buffer;
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while (isspace (*dev)) dev++;
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p = strchr (dev, ':');
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if (!p) continue;
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*p++ = 0;
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/* If it's not a digit, then it's most likely an error
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* message like 'No statistics available'. */
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while (isspace (*p)) p++;
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if (!isdigit (*p)) continue;
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if (strcmp (dev, interface))
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continue;
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/* Only read byte counts if we really have them. */
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if (have_bytes) {
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buf->bytes_in = strtoul (p, &p, 0);
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fields--;
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}
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buf->packets_in = strtoul (p, &p, 0);
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buf->errors_in = strtoul (p, &p, 0);
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p = skip_multiple_token (p, fields);
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if (have_bytes)
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buf->bytes_out = strtoul (p, &p, 0);
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buf->packets_out = strtoul (p, &p, 0);
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buf->errors_out = strtoul (p, &p, 0);
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p = skip_multiple_token (p, 2);
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buf->collisions = strtoul (p, &p, 0);
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/* Compute total valules. */
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buf->bytes_total = buf->bytes_in + buf->bytes_out;
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buf->packets_total = buf->packets_in + buf->packets_out;
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/* And now the flags. */
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buf->flags |= _glibtop_sysdeps_netload;
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buf->flags |= _glibtop_sysdeps_netload_packets;
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if (have_bytes)
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buf->flags |= _glibtop_sysdeps_netload_bytes;
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}
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fclose (f);
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}
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