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Posted to commits@nuttx.apache.org by xi...@apache.org on 2022/09/09 11:33:53 UTC
[incubator-nuttx] 01/02: net/procfs: add tcp profs support
This is an automated email from the ASF dual-hosted git repository.
xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
commit 7190e56a14036426fbf13425daf59a0423d9447b
Author: chao an <an...@xiaomi.com>
AuthorDate: Mon Sep 5 17:06:05 2022 +0800
net/procfs: add tcp profs support
add proc node /proc/net/tcp to show the active tcp connections from procfs
nuttx style:
server> cat /proc/net/tcp
TCP sl st flg ref tmr uack nrt rxsz local_address remote_address
1: 04 61 1 12 0 0 1024 0.0.0.0:4855 192.168.31.22:5001
2: 04 61 1 12 0 0 1024 0.0.0.0:4856 192.168.31.22:5001
3: 04 61 1 9 0 0 0 :::4853 fe80::b27b:25ff:fe28:4011:8789
4: 04 61 1 3 3 0 0 :::4854 fe80::b27b:25ff:fe28:4011:8789
linux kernel:
https://www.kernel.org/doc/Documentation/networking/proc_net_tcp.txt
Signed-off-by: chao an <an...@xiaomi.com>
---
net/procfs/Make.defs | 3 +
net/procfs/net_procfs.c | 8 ++
net/procfs/net_tcp.c | 218 ++++++++++++++++++++++++++++++++++++++++++++++++
net/procfs/procfs.h | 23 +++++
4 files changed, 252 insertions(+)
diff --git a/net/procfs/Make.defs b/net/procfs/Make.defs
index 7e096b17da..e00db6f09d 100644
--- a/net/procfs/Make.defs
+++ b/net/procfs/Make.defs
@@ -33,6 +33,9 @@ ifeq ($(CONFIG_NET_STATISTICS),y)
ifeq ($(CONFIG_NET_MLD),y)
NET_CSRCS += net_mld.c
endif
+ifeq ($(CONFIG_NET_TCP),y)
+ NET_CSRCS += net_tcp.c
+endif
endif
# Routing table
diff --git a/net/procfs/net_procfs.c b/net/procfs/net_procfs.c
index 0e8f3f7d98..353ccad1e6 100644
--- a/net/procfs/net_procfs.c
+++ b/net/procfs/net_procfs.c
@@ -124,6 +124,14 @@ static const struct netprocfs_entry_s g_net_entries[] =
}
},
# endif
+# ifdef CONFIG_NET_TCP
+ {
+ DTYPE_FILE, "tcp",
+ {
+ netprocfs_read_tcpstats
+ }
+ },
+# endif
#endif
#ifdef CONFIG_NET_ROUTE
{
diff --git a/net/procfs/net_tcp.c b/net/procfs/net_tcp.c
new file mode 100644
index 0000000000..dc779aa0d2
--- /dev/null
+++ b/net/procfs/net_tcp.c
@@ -0,0 +1,218 @@
+/****************************************************************************
+ * net/procfs/net_tcp.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 <sys/types.h>
+#include <stdio.h>
+#include <string.h>
+#include <debug.h>
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+#include <nuttx/net/netstats.h>
+
+#include "procfs/procfs.h"
+#include "tcp/tcp.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_TCP
+
+#ifdef CONFIG_NET_IPv6
+# define TCP_LINELEN 180
+#else
+# define TCP_LINELEN 120
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static ssize_t netprocfs_tcpstats(FAR struct netprocfs_file_s *priv,
+ FAR char *buffer, size_t buflen,
+ uint8_t domain, int *skip)
+{
+ int addrlen = (domain == PF_INET) ?
+ INET_ADDRSTRLEN : INET6_ADDRSTRLEN;
+ FAR struct tcp_conn_s *conn = NULL;
+ char remote[addrlen + 1];
+ char local[addrlen + 1];
+ int len = 0;
+ void *laddr;
+ void *raddr;
+
+ net_lock();
+
+ local[addrlen] = '\0';
+ remote[addrlen] = '\0';
+
+ while ((conn = tcp_nextconn(conn)) != NULL)
+ {
+#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
+ if (conn->domain != domain)
+ {
+ continue;
+ }
+#endif /* CONFIG_NET_IPv4 && CONFIG_NET_IPv6 */
+
+ if (++(*skip) <= priv->offset)
+ {
+ continue;
+ }
+
+ if (buflen - len < TCP_LINELEN)
+ {
+ break;
+ }
+
+#ifdef CONFIG_NET_IPv4
+# ifdef CONFIG_NET_IPv6
+ if (domain == PF_INET)
+# endif /* CONFIG_NET_IPv6 */
+ {
+ laddr = &conn->u.ipv4.laddr;
+ raddr = &conn->u.ipv4.raddr;
+ }
+#endif /* CONFIG_NET_IPv4 */
+
+#ifdef CONFIG_NET_IPv6
+# ifdef CONFIG_NET_IPv4
+ else
+# endif /* CONFIG_NET_IPv4 */
+ {
+ laddr = &conn->u.ipv6.laddr;
+ raddr = &conn->u.ipv6.raddr;
+ }
+#endif /* CONFIG_NET_IPv6 */
+
+ len += snprintf(buffer + len, buflen - len,
+ " %2" PRIu8
+ ": %02" PRIx8
+ " %3" PRIx8 " %3" PRIu8
+ " %3" PRIu8
+ " %4" PRIu32
+ " %3" PRIu8
+#if CONFIG_NET_SEND_BUFSIZE > 0
+ " %6" PRIu32
+#endif
+ " %6u",
+ priv->offset++,
+ conn->tcpstateflags,
+ conn->sconn.s_flags,
+ conn->crefs,
+ conn->timer,
+ (uint32_t)conn->tx_unacked,
+ conn->nrtx,
+#if CONFIG_NET_SEND_BUFSIZE > 0
+ tcp_wrbuffer_inqueue_size(conn),
+#endif
+ (conn->readahead) ? conn->readahead->io_pktlen : 0);
+
+ len += snprintf(buffer + len, buflen - len,
+ " %*s:%-6" PRIu16 " %*s:%-6" PRIu16 "\n",
+ (domain == PF_INET6) ? addrlen / 2 : addrlen,
+ inet_ntop(domain, laddr, local, addrlen),
+ ntohs(conn->lport),
+ (domain == PF_INET6) ? addrlen / 2 : addrlen,
+ inet_ntop(domain, raddr, remote, addrlen),
+ ntohs(conn->rport));
+ }
+
+ net_unlock();
+
+ return len;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: netprocfs_read_tcpstats
+ *
+ * Description:
+ * Read and format TCP statistics.
+ *
+ * Input Parameters:
+ * priv - A reference to the network procfs file structure
+ * buffer - The user-provided buffer into which network 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_tcpstats(FAR struct netprocfs_file_s *priv,
+ FAR char *buffer, size_t buflen)
+{
+ int skip = 1;
+ int len = 0;
+
+ net_lock();
+
+ if (tcp_nextconn(NULL) != NULL)
+ {
+ if (priv->offset == 0)
+ {
+ len = snprintf(buffer, buflen, "TCP sl "
+ "st flg ref tmr uack nrt "
+#if CONFIG_NET_SEND_BUFSIZE > 0
+ "txsz "
+#endif
+ "rxsz "
+ "%-*s "
+ "%-*s\n"
+ ,
+ INET6_ADDRSTRLEN / 2,
+ "local_address",
+ INET6_ADDRSTRLEN / 2,
+ "remote_address"
+ );
+ priv->offset = 1;
+ }
+
+#ifdef CONFIG_NET_IPv4
+ len += netprocfs_tcpstats(priv, buffer + len,
+ buflen - len, PF_INET, &skip);
+#endif /* CONFIG_NET_IPv4 */
+
+#ifdef CONFIG_NET_IPv6
+ len += netprocfs_tcpstats(priv, buffer + len,
+ buflen - len, PF_INET6, &skip);
+#endif /* CONFIG_NET_IPv6 */
+ }
+
+ net_unlock();
+
+ return len;
+}
+
+#endif /* CONFIG_NET_TCP */
diff --git a/net/procfs/procfs.h b/net/procfs/procfs.h
index dd95dfc047..79701f438b 100644
--- a/net/procfs/procfs.h
+++ b/net/procfs/procfs.h
@@ -164,6 +164,29 @@ ssize_t netprocfs_read_mldstats(FAR struct netprocfs_file_s *priv,
FAR char *buffer, size_t buflen);
#endif
+/****************************************************************************
+ * Name: netprocfs_read_tcpstats
+ *
+ * Description:
+ * Read and format TCP statistics.
+ *
+ * Input Parameters:
+ * priv - A reference to the network procfs file structure
+ * buffer - The user-provided buffer into which network 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.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NET_TCP
+ssize_t netprocfs_read_tcpstats(FAR struct netprocfs_file_s *priv,
+ FAR char *buffer, size_t buflen);
+#endif
+
/****************************************************************************
* Name: netprocfs_read_routes
*