d10cd8d585
add proc node /proc/net/udp to show the active udp connections from procfs nuttx style: server> cat /proc/net/udp UDP sl local_address remote_address flg txsz rxsz (IPv4) 1: 0.0.0.0: 5285 192.168.31.22: 7779 9 0 1041 2: 0.0.0.0: 5286 192.168.31.22: 7779 9 0 1041 3: 0.0.0.0: 5287 192.168.31.22: 7779 9 0 1041 linux kernel: https://www.kernel.org/doc/Documentation/networking/proc_net_tcp.txt Signed-off-by: chao an <anchao@xiaomi.com>
210 lines
6.2 KiB
C
210 lines
6.2 KiB
C
/****************************************************************************
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* net/procfs/net_udp.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include <debug.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <nuttx/net/netstats.h>
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#include "procfs/procfs.h"
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#include "udp/udp.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifdef CONFIG_NET_UDP
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#ifdef CONFIG_NET_IPv6
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# define UDP_LINELEN 180
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#else
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# define UDP_LINELEN 120
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static ssize_t netprocfs_udpstats(FAR struct netprocfs_file_s *priv,
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FAR char *buffer, size_t buflen,
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uint8_t domain, int *skip)
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{
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int addrlen = (domain == PF_INET) ?
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INET_ADDRSTRLEN : INET6_ADDRSTRLEN;
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FAR struct udp_conn_s *conn = NULL;
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char remote[addrlen + 1];
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char local[addrlen + 1];
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int len = 0;
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void *laddr;
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void *raddr;
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net_lock();
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local[addrlen] = '\0';
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remote[addrlen] = '\0';
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while ((conn = udp_nextconn(conn)) != NULL)
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{
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#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
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if (conn->domain != domain)
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{
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continue;
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}
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#endif /* CONFIG_NET_IPv4 && CONFIG_NET_IPv6 */
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if (++(*skip) <= priv->offset)
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{
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continue;
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}
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if (buflen - len < UDP_LINELEN)
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{
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break;
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}
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#ifdef CONFIG_NET_IPv4
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# ifdef CONFIG_NET_IPv6
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if (domain == PF_INET)
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# endif /* CONFIG_NET_IPv6 */
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{
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laddr = &conn->u.ipv4.laddr;
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raddr = &conn->u.ipv4.raddr;
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}
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#endif /* CONFIG_NET_IPv4 */
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#ifdef CONFIG_NET_IPv6
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# ifdef CONFIG_NET_IPv4
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else
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# endif /* CONFIG_NET_IPv4 */
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{
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laddr = &conn->u.ipv6.laddr;
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raddr = &conn->u.ipv6.raddr;
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}
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#endif /* CONFIG_NET_IPv6 */
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len += snprintf(buffer + len, buflen - len,
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" %2" PRIu8
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": %3" PRIx8
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#if CONFIG_NET_SEND_BUFSIZE > 0
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" %6" PRIu32
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#endif
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" %6u",
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priv->offset++,
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conn->sconn.s_flags,
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#if CONFIG_NET_SEND_BUFSIZE > 0
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udp_wrbuffer_inqueue_size(conn),
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#endif
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iob_get_queue_size(&conn->readahead));
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len += snprintf(buffer + len, buflen - len,
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" %*s:%-6" PRIu16 " %*s:%-6" PRIu16 "\n",
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(domain == PF_INET6) ? addrlen / 2 : addrlen,
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inet_ntop(domain, laddr, local, addrlen),
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ntohs(conn->lport),
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(domain == PF_INET6) ? addrlen / 2 : addrlen,
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inet_ntop(domain, raddr, remote, addrlen),
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ntohs(conn->rport));
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}
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net_unlock();
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return len;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: netprocfs_read_udpstats
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*
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* Description:
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* Read and format UDP statistics.
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*
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* Input Parameters:
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* priv - A reference to the network procfs file structure
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* buffer - The user-provided buffer into which network status will be
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* returned.
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* bulen - The size in bytes of the user provided buffer.
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*
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* Returned Value:
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* Zero (OK) is returned on success; a negated errno value is returned
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* on failure.
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*
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****************************************************************************/
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ssize_t netprocfs_read_udpstats(FAR struct netprocfs_file_s *priv,
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FAR char *buffer, size_t buflen)
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{
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int skip = 1;
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int len = 0;
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net_lock();
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if (udp_nextconn(NULL) != NULL)
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{
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if (priv->offset == 0)
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{
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len = snprintf(buffer, buflen, "UDP sl "
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" flg "
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#if CONFIG_NET_SEND_BUFSIZE > 0
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"txsz "
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#endif
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"rxsz "
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"%-*s "
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"%-*s\n"
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,
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INET6_ADDRSTRLEN / 2,
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"local_address",
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INET6_ADDRSTRLEN / 2,
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"remote_address"
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);
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priv->offset = 1;
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}
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#ifdef CONFIG_NET_IPv4
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len += netprocfs_udpstats(priv, buffer + len,
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buflen - len, PF_INET, &skip);
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#endif /* CONFIG_NET_IPv4 */
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#ifdef CONFIG_NET_IPv6
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len += netprocfs_udpstats(priv, buffer + len,
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buflen - len, PF_INET6, &skip);
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#endif /* CONFIG_NET_IPv6 */
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}
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net_unlock();
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return len;
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}
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#endif /* CONFIG_NET_UDP */
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