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/*
* Copyright (c) 2004,2006 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <fcntl.h>
#include <limits.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_dl.h>
#include <net/route.h>
#include <mach/mach.h>
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include "network.h"
extern char *pmProgname;
extern mach_port_t mach_master_port;
void
init_network(void)
{
}
/*
* Ensure we have space for the next interface in our pre-allocated
* interface stats pool. If not, make some or pass on the error.
*/
static int
check_stats_size(struct netstats *stats, int count)
{
if (count > stats->highwater) {
stats->highwater++;
stats->interfaces = realloc(stats->interfaces,
stats->highwater * sizeof(struct ifacestat));
if (!stats->interfaces) {
stats->highwater = 0;
return -ENOMEM;
}
}
return 0;
}
/*
* Insert all interfaces into the global network instance domain.
*/
static int
update_network_indom(struct netstats *all, int count, pmdaIndom *indom)
{
int i;
if (count > 0 && count != indom->it_numinst) {
i = sizeof(pmdaInstid) * count;
if ((indom->it_set = realloc(indom->it_set, i)) == NULL) {
indom->it_numinst = 0;
return -ENOMEM;
}
}
for (i = 0; i < count; i++) {
indom->it_set[i].i_name = all->interfaces[i].name;
indom->it_set[i].i_inst = i;
}
indom->it_numinst = count;
return 0;
}
int
refresh_network(struct netstats *stats, pmdaIndom *indom)
{
int i = 0, status = 0;
size_t n;
char *new_buf, *next, *end;
struct sockaddr_dl *sdl;
static char *buf=NULL;
static size_t buf_len=0;
#ifdef RTM_IFINFO2
struct if_msghdr2 *ifm;
int mib[6] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST2, 0};
#else
struct if_msghdr *ifm;
int mib[6] = {CTL_NET, PF_ROUTE, 0, 0, NET_RT_IFLIST, 0};
#endif
if( sysctl( mib, 6, NULL, &n, NULL, 0 ) < 0 ) {
/* unable to query buffer size */
fprintf( stderr, "%s: get net mib buf len failed\n", pmProgname );
return -ENXIO;
}
if( n > buf_len ) {
if( (new_buf = malloc(n)) == NULL ) {
/* unable to malloc buf */
fprintf( stderr, "%s: net mib buf malloc failed\n", pmProgname );
return -ENXIO;
} else {
if( buf != NULL ) free( buf );
buf = new_buf;
buf_len = n;
}
}
if( sysctl( mib, 6, buf, &n, NULL, 0 ) < 0 ) {
/* unable to copy-in buffer */
fprintf( stderr, "%s: net mib buf read failed\n", pmProgname );
return -ENXIO;
}
for( next = buf, i=0, end = buf + n; next < end; ) {
#ifdef RTM_IFINFO2
ifm = (struct if_msghdr2 *)next;
next += ifm->ifm_msglen;
if( ifm->ifm_type == RTM_IFINFO2 ) {
#else
ifm = (struct if_msghdr *)next;
next += ifm->ifm_msglen;
if( ifm->ifm_type == RTM_IFINFO ) {
#endif
status = check_stats_size(stats, i + 1);
if (status < 0) break;
sdl = (struct sockaddr_dl *)(ifm + 1);
n = sdl->sdl_nlen < IFNAMEMAX ? sdl->sdl_nlen : IFNAMEMAX;
strncpy( stats->interfaces[i].name, sdl->sdl_data, n );
stats->interfaces[i].name[n] = 0;
stats->interfaces[i].mtu = ifm->ifm_data.ifi_mtu;
stats->interfaces[i].baudrate = ifm->ifm_data.ifi_baudrate;
stats->interfaces[i].ipackets = ifm->ifm_data.ifi_ipackets;
stats->interfaces[i].ierrors = ifm->ifm_data.ifi_ierrors;
stats->interfaces[i].opackets = ifm->ifm_data.ifi_opackets;
stats->interfaces[i].oerrors = ifm->ifm_data.ifi_oerrors;
stats->interfaces[i].collisions = ifm->ifm_data.ifi_collisions;
stats->interfaces[i].ibytes = ifm->ifm_data.ifi_ibytes;
stats->interfaces[i].obytes = ifm->ifm_data.ifi_obytes;
stats->interfaces[i].imcasts = ifm->ifm_data.ifi_imcasts;
stats->interfaces[i].omcasts = ifm->ifm_data.ifi_omcasts;
stats->interfaces[i].iqdrops = ifm->ifm_data.ifi_iqdrops;
i++;
}
}
if (!status) update_network_indom(stats, i, indom);
return status;
}
int
refresh_nfs(struct nfsstats *stats)
{
int name[3];
size_t length = sizeof(struct nfsstats);
static int nfstype = -1;
if (nfstype == -1) {
struct vfsconf vfsconf;
if (getvfsbyname("nfs", &vfsconf) == -1)
return -oserror();
nfstype = vfsconf.vfc_typenum;
}
name[0] = CTL_VFS;
name[1] = nfstype;
name[0] = NFS_NFSSTATS;
if (sysctl(name, 3, stats, &length, NULL, 0) == -1)
return -oserror();
stats->biocache_reads -= stats->read_bios;
stats->biocache_writes -= stats->write_bios;
stats->biocache_readlinks -= stats->readlink_bios;
stats->biocache_readdirs -= stats->readdir_bios;
return 0;
}
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