app/netstatistics: Add net statistics api for user

Signed-off-by: meijian <meijian@xiaomi.com>

include/netutils/netlib.h

@@ -58,6 +58,7 @@
 
 #include <net/if.h>
 #include <netinet/in.h>
+#include <nuttx/net/netdev.h>
 #include <nuttx/net/netconfig.h>
 
 /****************************************************************************
@@ -495,6 +496,11 @@ int netlib_set_ipv6dnsaddr(FAR const struct in6_addr *inaddr);
 
 int netlib_set_mtu(FAR const char *ifname, int mtu);
 
+#if defined(CONFIG_NETDEV_STATISTICS)
+int netlib_getifstatistics(FAR const char *ifname,
+                           FAR struct netdev_statistics_s *stat);
+#endif
+
 #undef EXTERN
 #ifdef __cplusplus
 }

netutils/netlib/CMakeLists.txt

@@ -123,6 +123,10 @@ if(CONFIG_NETUTILS_NETLIB)
          netlib_eaddrconv.c)
   endif()
 
+  if(CONFIG_NETDEV_STATISTICS)
+    list(APPEND SRCS netlib_getifstatistics.c)
+  endif()
+
   if(CONFIG_WIRELESS_PKTRADIO)
     list(APPEND SRCS netlib_getproperties.c netlib_getnodeaddr.c
          netlib_setnodeaddr.c)

netutils/netlib/Makefile

@@ -91,6 +91,10 @@ CSRCS += netlib_getroute.c
 endif
 endif
 
+ifeq ($(CONFIG_NETDEV_STATISTICS),y)
+CSRCS += netlib_getifstatistics.c
+endif
+
 # Netfilter connection support
 
 ifeq ($(CONFIG_NETLINK_NETFILTER),y)

netutils/netlib/netlib_getifstatistics.c

@@ -0,0 +1,152 @@
+/****************************************************************************
+ * apps/netutils/netlib/netlib_getifstatistics.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <sys/types.h>
+
+#include "netutils/netlib.h"
+
+#ifdef CONFIG_NETDEV_STATISTICS
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Determines the size of an intermediate buffer that must be large enough
+ * to handle the longest line generated by this logic.
+ */
+
+#define PROCFS_LINELEN   80
+#define PROCFS_NET_PATH "/proc/net/"
+
+/* The form of the entry from the netstat file:
+ *
+ * wlan0   Link encap:Ethernet HWaddr 42:37:46:02:16:07 at UP mtu 1500
+ *         inet addr:10.0.1.2 DRaddr:10.0.1.1 Mask:255.255.255.0
+ *         inet6 DRaddr: ::
+ *
+ *         RX: Received Fragment Errors   Bytes
+ *             000008c1 00000000 00000000 331ca8
+ *             IPv4     IPv6     ARP      Dropped
+ *             000008a7 00000018 00000002 00000000
+ *         TX: Queued   Sent     Errors   Timeouts Bytes
+ *             00000973 00000973 00000000 00000000 1b8d3
+ *         Total Errors: 00000000
+ */
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: netlib_getifstatistics
+ *
+ * Description:
+ *   Read the DEV RX/TX statistics.
+ *
+ * Input Parameters:
+ *   ifname - The interface to read.
+ *   stat   - The pointer to return dev statistics.
+ *
+ * Returned Value:
+ *   0 on success. A negated errno value is returned
+ *   on any failure.
+ ****************************************************************************/
+
+int netlib_getifstatistics(FAR const char *ifname,
+                           FAR struct netdev_statistics_s *stat)
+{
+  FAR FILE *stream;
+  char path[32];
+  char line[PROCFS_LINELEN];
+  int ret = OK;
+
+  snprintf(path, sizeof(path), "%s%s", PROCFS_NET_PATH, ifname);
+  ninfo("get statistics from %s \n", path);
+
+  stream = fopen(path, "r");
+  if (stream == NULL)
+    {
+      fprintf(stderr, "ERROR: Failed to open path:%s \n", path);
+      return -ENOTDIR;
+    }
+
+  while (fgets(line, sizeof(line), stream) != NULL)
+    {
+      /*  Read RX header and next is the data */
+
+      if (strstr(line, "RX:") != NULL)
+        {
+          if (fgets(line, sizeof(line), stream) == NULL)
+            {
+              ret = -EINVAL;
+              break;
+            }
+
+          if (sscanf(line, "%" SCNx32 "%" SCNx32 "%" SCNx32 "%" SCNx64,
+                     &stat->rx_packets,
+                     &stat->rx_fragments,
+                     &stat->rx_errors,
+                     &stat->rx_bytes) <= 0)
+            {
+              ret = -EINVAL;
+              break;
+            }
+        }
+
+      /*  Read TX header and next is the data */
+
+      if (strstr(line, "TX:") != NULL)
+        {
+          if (fgets(line, sizeof(line), stream) == NULL)
+            {
+              ret = -EINVAL;
+              break;
+            }
+
+          if (sscanf(line, "%" SCNx32 "%" SCNx32 "%" SCNx32 \
+                     "%" SCNx32 "%" SCNx64,
+                     &stat->tx_packets,
+                     &stat->tx_done,
+                     &stat->tx_errors,
+                     &stat->tx_timeouts,
+                     &stat->tx_bytes) <= 0)
+            {
+              ret = -EINVAL;
+              break;
+            }
+        }
+    }
+
+  fclose(stream);
+  return ret;
+}
+
+#endif /* CONFIG_NETDEV_STATISTICS */