817a43de4d
Example of /proc/PID/group/fd, which prints the file path: FD OFLAGS TYPE POS PATH 0 3 1 0 /dev/console 1 3 1 0 /dev/console 2 3 1 0 /dev/console 3 3 9 0 udp:[0.0.0.0:10197<->114.118.7.163:123, tx 0/16384, rx 0/16384, flg 1] 4 1027 9 0 tcp:[0.0.0.0:23<->0.0.0.0:0, tx 0/16384, rx 0/16384 + ofo 0, st 01, flg 31] 5 67 9 0 local:[md:ap] Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
163 lines
4.8 KiB
C
163 lines
4.8 KiB
C
/****************************************************************************
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* net/udp/udp_ioctl.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 <stdint.h>
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#include <stdio.h>
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#include <stdbool.h>
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#include <debug.h>
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#include <errno.h>
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#include <net/if.h>
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#include <nuttx/fs/ioctl.h>
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#include <nuttx/mm/iob.h>
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#include <nuttx/net/net.h>
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#include "udp/udp.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: udp_path
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*
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* Description:
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* This function generates udp status as path.
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*
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* Parameters:
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* conn The UDP connection of interest
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* buf The buffer to get the path
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* len The length of the buffer
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*
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****************************************************************************/
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static void udp_path(FAR struct udp_conn_s *conn, FAR char *buf, size_t len)
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{
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#if defined(CONFIG_NET_IPv4) && defined(CONFIG_NET_IPv6)
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uint8_t domain = conn->domain;
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#elif defined(CONFIG_NET_IPv4)
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const uint8_t domain = PF_INET;
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#else
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const uint8_t domain = PF_INET6;
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#endif
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char remote[INET6_ADDRSTRLEN];
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char local[INET6_ADDRSTRLEN];
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FAR void *laddr = net_ip_binding_laddr(&conn->u, domain);
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FAR void *raddr = net_ip_binding_raddr(&conn->u, domain);
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snprintf(buf, len, "udp:["
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"%s:%" PRIu16 "<->%s:%" PRIu16
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#if CONFIG_NET_SEND_BUFSIZE > 0
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", tx %" PRIu32 "/%" PRId32
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#endif
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#if CONFIG_NET_RECV_BUFSIZE > 0
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", rx %u/%" PRId32
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#endif
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", flg %" PRIx8
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"]",
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inet_ntop(domain, laddr, local, sizeof(local)),
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ntohs(conn->lport),
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inet_ntop(domain, raddr, remote, sizeof(remote)),
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ntohs(conn->rport),
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#if CONFIG_NET_SEND_BUFSIZE > 0
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udp_wrbuffer_inqueue_size(conn),
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conn->sndbufs,
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#endif
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#if CONFIG_NET_RECV_BUFSIZE > 0
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(conn->readahead) ? conn->readahead->io_pktlen : 0,
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conn->rcvbufs,
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#endif
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conn->sconn.s_flags
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);
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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: udp_ioctl
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*
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* Description:
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* This function performs udp specific ioctl() operations.
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*
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* Parameters:
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* conn The UDP connection of interest
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* cmd The ioctl command
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* arg The argument of the ioctl cmd
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*
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****************************************************************************/
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int udp_ioctl(FAR struct udp_conn_s *conn, int cmd, unsigned long arg)
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{
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FAR struct iob_s *iob;
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int ret = OK;
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net_lock();
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switch (cmd)
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{
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case FIONREAD:
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iob = conn->readahead;
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if (iob)
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{
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uint16_t datalen;
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iob_copyout((FAR uint8_t *)&datalen, iob, sizeof(datalen), 0);
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*(FAR int *)((uintptr_t)arg) = datalen;
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}
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else
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{
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*(FAR int *)((uintptr_t)arg) = 0;
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}
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break;
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case FIONSPACE:
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#ifdef CONFIG_NET_UDP_WRITE_BUFFERS
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# if CONFIG_NET_SEND_BUFSIZE == 0
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*(FAR int *)((uintptr_t)arg) =
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iob_navail(true) * CONFIG_IOB_BUFSIZE;
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# else
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*(FAR int *)((uintptr_t)arg) =
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conn->sndbufs - udp_wrbuffer_inqueue_size(conn);
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# endif
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#else
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*(FAR int *)((uintptr_t)arg) = MIN_UDP_MSS;
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#endif
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break;
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case FIOC_FILEPATH:
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udp_path(conn, (FAR char *)(uintptr_t)arg, PATH_MAX);
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ret = OK;
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break;
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default:
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ret = -ENOTTY;
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break;
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}
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net_unlock();
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return ret;
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}
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