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0260891c96
nuttx/net/procfs/netdev_statistics.c
Masayuki Ishikawa 0260891c96 net procfs: Fix buffer corruption and refactor netdev_statistics.c 
Signed-off-by: Masayuki Ishikawa <masayuki.ishikawa@gmail.com>
2017-05-19 06:09:06 +09:00

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/****************************************************************************
* net/procfs/netdev_statistics.c
*
* Copyright (C) 2015, 2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include <debug.h>
#include <netinet/ether.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/sixlowpan.h>
#include "netdev/netdev.h"
#include "utils/utils.h"
#include "procfs/procfs.h"
#if !defined(CONFIG_DISABLE_MOUNTPOINT) && defined(CONFIG_FS_PROCFS) && \
!defined(CONFIG_FS_PROCFS_EXCLUDE_NET)
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int netprocfs_linklayer(FAR struct netprocfs_file_s *netfile);
#ifdef CONFIG_NET_IPv4
static int netprocfs_inet4addresses(FAR struct netprocfs_file_s *netfile);
#endif
#ifdef CONFIG_NET_IPv6
static int netprocfs_inet6address(FAR struct netprocfs_file_s *netfile);
static int netprocfs_inet6draddress(FAR struct netprocfs_file_s *netfile);
#endif
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_rxstatistics_header(FAR struct netprocfs_file_s *netfile);
static int netprocfs_rxstatistics(FAR struct netprocfs_file_s *netfile);
static int netprocfs_rxpackets_header(FAR struct netprocfs_file_s *netfile);
static int netprocfs_rxpackets(FAR struct netprocfs_file_s *netfile);
static int netprocfs_txstatistics_header(FAR struct netprocfs_file_s *netfile);
static int netprocfs_txstatistics(FAR struct netprocfs_file_s *netfile);
static int netprocfs_errors(FAR struct netprocfs_file_s *netfile);
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Private Data
****************************************************************************/
/* Line generating functions */
static const linegen_t g_linegen[] =
{
netprocfs_linklayer
#ifdef CONFIG_NET_IPv4
, netprocfs_inet4addresses
#endif
#ifdef CONFIG_NET_IPv6
, netprocfs_inet6address
, netprocfs_inet6draddress
#endif
#ifdef CONFIG_NETDEV_STATISTICS
, netprocfs_rxstatistics_header,
netprocfs_rxstatistics,
netprocfs_rxpackets_header,
netprocfs_rxpackets,
netprocfs_txstatistics_header,
netprocfs_txstatistics,
netprocfs_errors
#endif /* CONFIG_NETDEV_STATISTICS */
};
#define NSTAT_LINES (sizeof(g_linegen) / sizeof(linegen_t))
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: netprocfs_linklayer
****************************************************************************/
static int netprocfs_linklayer(FAR struct netprocfs_file_s *netfile)
{
FAR struct net_driver_s *dev;
FAR const char *status;
int len = 0;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
/* Get the interface status: RUNNING, UP, or DOWN */
if ((dev->d_flags & IFF_RUNNING) != 0)
{
status = "RUNNING";
}
else if ((dev->d_flags & IFF_UP) != 0)
{
status = "UP";
}
else
{
status = "DOWN";
}
#if defined(CONFIG_NET_MULTILINK)
/* If there are multiple link types being supported, then selected the
* output appropriate for the link type associated with this device.
*/
switch (dev->d_lltype)
{
#ifdef CONFIG_NET_ETHERNET
case NET_LL_ETHERNET:
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:Ethernet HWaddr %s",
dev->d_ifname, ether_ntoa(&dev->d_mac.ether));
break;
#endif
#ifdef CONFIG_NET_6LOWPAN
case NET_LL_IEEE802154:
{
#ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:6loWPAN HWaddr "
"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x",
dev->d_ifname,
dev->d_mac.ieee802154.u8[0], dev->d_mac.ieee802154.u8[1],
dev->d_mac.ieee802154.u8[2], dev->d_mac.ieee802154.u8[3],
dev->d_mac.ieee802154.u8[4], dev->d_mac.ieee802154.u8[5],
dev->d_mac.ieee802154.u8[6], dev->d_mac.ieee802154.u8[7]);
#else
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:6loWPAN HWaddr %02x:%02x",
dev->d_ifname,
dev->d_mac.ieee802154.u8[0], dev->d_mac.ieee802154.u8[1]);
#endif
}
break;
#endif
#ifdef CONFIG_NET_LOOPBACK
case NET_LL_LOOPBACK:
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:Local Loopback",
dev->d_ifname);
break;
#endif
#ifdef CONFIG_NET_SLIP
case NET_LL_SLIP:
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:SLIP", dev->d_ifname);
break;
#endif
#ifdef CONFIG_NET_PPP
case NET_LL_PPP:
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:P-t-P", dev->d_ifname);
break;
#endif
#ifdef CONFIG_NET_TUN
case NET_LL_TUN:
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:TUN", dev->d_ifname);
break;
#endif
default:
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:UNSPEC", dev->d_ifname);
}
len += snprintf(&netfile->line[len], NET_LINELEN - len,
" at %s\n", status);
#elif defined(CONFIG_NET_ETHERNET)
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:Ethernet HWaddr %s at %s\n",
dev->d_ifname, ether_ntoa(&dev->d_mac.ether), status);
#elif defined(CONFIG_NET_6LOWPAN)
#ifdef CONFIG_NET_6LOWPAN_EXTENDEDADDR
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:6loWPAN HWaddr "
"%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x at %s\n",
dev->d_ifname,
dev->d_mac.ieee802154.u8[0], dev->d_mac.ieee802154.u8[1],
dev->d_mac.ieee802154.u8[2], dev->d_mac.ieee802154.u8[3],
dev->d_mac.ieee802154.u8[4], dev->d_mac.ieee802154.u8[5],
dev->d_mac.ieee802154.u8[6], dev->d_mac.ieee802154.u8[7],
status);
#else
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:6loWPAN HWaddr %02x:%02x at %s\n",
dev->d_ifname,
dev->d_mac.ieee802154.u8[0], dev->d_mac.ieee802154.u8[1],
status);
#endif
#elif defined(CONFIG_NET_LOOPBACK)
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:Local Loopback at %s\n",
dev->d_ifname, status);
#elif defined(CONFIG_NET_SLIP)
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:SLIP at %s\n",
dev->d_ifname, status);
#elif defined(CONFIG_NET_PPP)
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:P-t-P at %s\n",
dev->d_ifname, status);
#elif defined(CONFIG_NET_TUN)
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"%s\tLink encap:TUN at %s\n",
dev->d_ifname, status);
#endif
return len;
}
/****************************************************************************
* Name: netprocfs_inet4addresses
****************************************************************************/
#ifdef CONFIG_NET_IPv4
static int netprocfs_inet4addresses(FAR struct netprocfs_file_s *netfile)
{
FAR struct net_driver_s *dev;
struct in_addr addr;
int len = 0;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
/* Show the IPv4 address */
addr.s_addr = dev->d_ipaddr;
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"\tinet addr:%s ", inet_ntoa(addr));
/* Show the IPv4 default router address */
addr.s_addr = dev->d_draddr;
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"DRaddr:%s ", inet_ntoa(addr));
/* Show the IPv4 network mask */
addr.s_addr = dev->d_netmask;
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"Mask:%s\n\n", inet_ntoa(addr));
return len;
}
#endif
/****************************************************************************
* Name: netprocfs_inet6address
****************************************************************************/
#ifdef CONFIG_NET_IPv6
static int netprocfs_inet6address(FAR struct netprocfs_file_s *netfile)
{
FAR struct net_driver_s *dev;
char addrstr[INET6_ADDRSTRLEN];
uint8_t preflen;
int len = 0;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
/* Convert the 128 network mask to a human friendly prefix length */
preflen = net_ipv6_mask2pref(dev->d_ipv6netmask);
/* Show the assigned IPv6 address */
if (inet_ntop(AF_INET6, dev->d_ipv6addr, addrstr, INET6_ADDRSTRLEN))
{
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"\tinet6 addr:%s/%d\n", addrstr, preflen);
}
return len;
}
#endif
/****************************************************************************
* Name: netprocfs_inet6draddress
****************************************************************************/
#ifdef CONFIG_NET_IPv6
static int netprocfs_inet6draddress(FAR struct netprocfs_file_s *netfile)
{
FAR struct net_driver_s *dev;
char addrstr[INET6_ADDRSTRLEN];
uint8_t preflen;
int len = 0;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
/* Convert the 128 network mask to a human friendly prefix length */
preflen = net_ipv6_mask2pref(dev->d_ipv6netmask);
/* Show the IPv6 default router address */
if (inet_ntop(AF_INET6, dev->d_ipv6draddr, addrstr, INET6_ADDRSTRLEN))
{
len += snprintf(&netfile->line[len], NET_LINELEN - len,
"\tinet6 DRaddr:%s/%d\n\n", addrstr, preflen);
}
return len;
}
#endif
/****************************************************************************
* Name: netprocfs_rxstatistics_header
****************************************************************************/
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_rxstatistics_header(FAR struct netprocfs_file_s *netfile)
{
DEBUGASSERT(netfile != NULL);
return snprintf(netfile->line, NET_LINELEN , "\tRX: %-8s %-8s %-8s\n",
"Received", "Fragment", "Errors");
}
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Name: netprocfs_rxstatistics
****************************************************************************/
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_rxstatistics(FAR struct netprocfs_file_s *netfile)
{
FAR struct netdev_statistics_s *stats;
FAR struct net_driver_s *dev;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
stats = &dev->d_statistics;
return snprintf(netfile->line, NET_LINELEN, "\t %08lx %08lx %08lx\n",
(unsigned long)stats->rx_packets,
(unsigned long)stats->rx_fragments,
(unsigned long)stats->rx_errors);
}
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Name: netprocfs_rxpackets_header
****************************************************************************/
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_rxpackets_header(FAR struct netprocfs_file_s *netfile)
{
FAR char *fmt;
DEBUGASSERT(netfile != NULL);
fmt = "\t "
#ifdef CONFIG_NET_IPv4
"%-8s "
#endif
#ifdef CONFIG_NET_IPv6
"%-8s "
#endif
#ifdef CONFIG_NET_ARP
"%-8s "
#endif
"%-8s\n";
return snprintf(netfile->line, NET_LINELEN, fmt
#ifdef CONFIG_NET_IPv4
, "IPv4"
#endif
#ifdef CONFIG_NET_IPv6
, "IPv6"
#endif
#ifdef CONFIG_NET_ARP
, "ARP"
#endif
, "Dropped");
}
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Name: netprocfs_rxpackets
****************************************************************************/
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_rxpackets(FAR struct netprocfs_file_s *netfile)
{
FAR struct netdev_statistics_s *stats;
FAR struct net_driver_s *dev;
FAR char *fmt;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
stats = &dev->d_statistics;
fmt = "\t "
#ifdef CONFIG_NET_IPv4
"%08lx "
#endif
#ifdef CONFIG_NET_IPv6
"%08lx "
#endif
#ifdef CONFIG_NET_ARP
"%08lx "
#endif
"%08lx\n";
return snprintf(netfile->line, NET_LINELEN, fmt
#ifdef CONFIG_NET_IPv4
, (unsigned long)stats->rx_ipv4
#endif
#ifdef CONFIG_NET_IPv6
, (unsigned long)stats->rx_ipv6
#endif
#ifdef CONFIG_NET_ARP
, (unsigned long)stats->rx_arp
#endif
, (unsigned long)stats->rx_dropped);
}
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Name: netprocfs_txstatistics_header
****************************************************************************/
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_txstatistics_header(FAR struct netprocfs_file_s *netfile)
{
DEBUGASSERT(netfile != NULL);
return snprintf(netfile->line, NET_LINELEN, "\tTX: %-8s %-8s %-8s %-8s\n",
"Queued", "Sent", "Errors", "Timeouts");
}
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Name: netprocfs_txstatistics
****************************************************************************/
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_txstatistics(FAR struct netprocfs_file_s *netfile)
{
FAR struct netdev_statistics_s *stats;
FAR struct net_driver_s *dev;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
stats = &dev->d_statistics;
return snprintf(netfile->line, NET_LINELEN, "\t %08lx %08lx %08lx %08lx\n",
(unsigned long)stats->tx_packets,
(unsigned long)stats->tx_done,
(unsigned long)stats->tx_errors,
(unsigned long)stats->tx_timeouts);
}
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Name: netprocfs_errors
****************************************************************************/
#ifdef CONFIG_NETDEV_STATISTICS
static int netprocfs_errors(FAR struct netprocfs_file_s *netfile)
{
FAR struct netdev_statistics_s *stats;
FAR struct net_driver_s *dev;
DEBUGASSERT(netfile != NULL && netfile->dev != NULL);
dev = netfile->dev;
stats = &dev->d_statistics;
return snprintf(netfile->line, NET_LINELEN , "\tTotal Errors: %08x\n\n",
(unsigned long)stats->errors);
}
#endif /* CONFIG_NETDEV_STATISTICS */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: netprocfs_read_devstats
*
* Description:
* Read and format network device statistics.
*
* Input Parameters:
* priv - A reference to the network procfs file structure
* buffer - The user-provided buffer into which device status will be
* returned.
* bulen - The size in bytes of the user provided buffer.
*
* Returned Value:
* Zero (OK) is returned on success; a negated errno value is returned
* on failure.
*
****************************************************************************/
ssize_t netprocfs_read_devstats(FAR struct netprocfs_file_s *priv,
FAR char *buffer, size_t buflen)
{
return netprocfs_read_linegen(priv, buffer, buflen, g_linegen, NSTAT_LINES);
}
#endif /* !CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_PROCFS &&
* !CONFIG_FS_PROCFS_EXCLUDE_NET */
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