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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Get interface's address and mask information by sysctl() function.
* Copyright (C) 1997, 98 Kunihiro Ishiguro
*/
#include <zebra.h>
#include <net/route.h>
#if !defined(GNU_LINUX) && !defined(OPEN_BSD)
#include <sys/sysctl.h>
#include "if.h"
#include "sockunion.h"
#include "prefix.h"
#include "connected.h"
#include "memory.h"
#include "ioctl.h"
#include "log.h"
#include "interface.h"
#include "vrf.h"
#include "zebra/rt.h"
#include "zebra/kernel_socket.h"
#include "zebra/rib.h"
#include "zebra/zebra_errors.h"
void ifstat_update_sysctl(void)
{
caddr_t ref, buf, end;
size_t bufsiz;
struct if_msghdr *ifm;
struct interface *ifp;
#define MIBSIZ 6
int mib[MIBSIZ] = {
CTL_NET, PF_ROUTE, 0, 0, /* AF_INET & AF_INET6 */
NET_RT_IFLIST, 0};
/* Query buffer size. */
if (sysctl(mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) {
flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl() error by %s",
safe_strerror(errno));
return;
}
/* We free this memory at the end of this function. */
ref = buf = XMALLOC(MTYPE_TMP, bufsiz);
/* Fetch interface information into allocated buffer. */
if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) {
flog_warn(EC_ZEBRA_SYSCTL_FAILED, "sysctl error by %s",
safe_strerror(errno));
XFREE(MTYPE_TMP, ref);
return;
}
/* Parse both interfaces and addresses. */
for (end = buf + bufsiz; buf < end; buf += ifm->ifm_msglen) {
ifm = (struct if_msghdr *)buf;
if (ifm->ifm_type == RTM_IFINFO) {
ifp = if_lookup_by_index(ifm->ifm_index, VRF_DEFAULT);
if (ifp)
ifp->stats = ifm->ifm_data;
}
}
/* Free sysctl buffer. */
XFREE(MTYPE_TMP, ref);
return;
}
/* Interface listing up function using sysctl(). */
void interface_list(struct zebra_ns *zns)
{
caddr_t ref, buf, end;
size_t bufsiz;
struct if_msghdr *ifm;
#define MIBSIZ 6
int mib[MIBSIZ] = {
CTL_NET, PF_ROUTE, 0, 0, /* AF_INET & AF_INET6 */
NET_RT_IFLIST, 0};
if (zns->ns_id != NS_DEFAULT) {
zlog_debug("%s: ignore NS %u", __func__, zns->ns_id);
return;
}
/* Query buffer size. */
if (sysctl(mib, MIBSIZ, NULL, &bufsiz, NULL, 0) < 0) {
flog_err_sys(EC_ZEBRA_IFLIST_FAILED,
"Could not enumerate interfaces: %s",
safe_strerror(errno));
return;
}
/* We free this memory at the end of this function. */
ref = buf = XMALLOC(MTYPE_TMP, bufsiz);
/* Fetch interface information into allocated buffer. */
if (sysctl(mib, MIBSIZ, buf, &bufsiz, NULL, 0) < 0) {
flog_err_sys(EC_ZEBRA_IFLIST_FAILED,
"Could not enumerate interfaces: %s",
safe_strerror(errno));
return;
}
/* Parse both interfaces and addresses. */
for (end = buf + bufsiz; buf < end; buf += ifm->ifm_msglen) {
ifm = (struct if_msghdr *)buf;
switch (ifm->ifm_type) {
case RTM_IFINFO:
ifm_read(ifm);
break;
case RTM_NEWADDR:
ifam_read((struct ifa_msghdr *)ifm);
break;
default:
zlog_info("%s: unexpected message type", __func__);
XFREE(MTYPE_TMP, ref);
return;
break;
}
}
/* Free sysctl buffer. */
XFREE(MTYPE_TMP, ref);
zebra_dplane_startup_stage(zns, ZEBRA_DPLANE_INTERFACES_READ);
}
#endif /* !defined(GNU_LINUX) && !defined(OPEN_BSD) */
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