[457] | 1 | /**
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| 2 | * @file
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| 3 | * Ping sender module
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| 4 | *
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Redistribution and use in source and binary forms, with or without modification,
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| 9 | * are permitted provided that the following conditions are met:
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| 10 | *
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| 11 | * 1. Redistributions of source code must retain the above copyright notice,
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| 12 | * this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer in the documentation
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| 15 | * and/or other materials provided with the distribution.
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| 16 | * 3. The name of the author may not be used to endorse or promote products
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| 17 | * derived from this software without specific prior written permission.
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| 18 | *
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| 19 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 20 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 21 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 22 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 23 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 24 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 27 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 28 | * OF SUCH DAMAGE.
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| 29 | *
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| 30 | * This file is part of the lwIP TCP/IP stack.
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| 31 | *
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| 32 | */
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| 33 |
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| 34 | /**
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| 35 | * This is an example of a "ping" sender (with raw API and socket API).
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| 36 | * It can be used as a start point to maintain opened a network connection, or
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| 37 | * like a network "watchdog" for your device.
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| 38 | *
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| 39 | */
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| 40 |
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| 41 | #include "lwip/opt.h"
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| 42 |
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| 43 | #if LWIP_RAW /* don't build if not configured for use in lwipopts.h */
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| 44 |
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| 45 | #include "ping.h"
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| 46 |
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| 47 | #include "lwip/mem.h"
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| 48 | #include "lwip/raw.h"
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| 49 | #include "lwip/icmp.h"
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| 50 | #include "lwip/netif.h"
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| 51 | #include "lwip/sys.h"
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| 52 | #include "lwip/timeouts.h"
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| 53 | #include "lwip/inet_chksum.h"
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| 54 | #include "lwip/prot/ip4.h"
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| 55 |
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| 56 | #if PING_USE_SOCKETS
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| 57 | #include "lwip/sockets.h"
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| 58 | #include "lwip/inet.h"
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| 59 | #include <string.h>
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| 60 | #endif /* PING_USE_SOCKETS */
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| 61 |
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| 62 |
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| 63 | /**
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| 64 | * PING_DEBUG: Enable debugging for PING.
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| 65 | */
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| 66 | #ifndef PING_DEBUG
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| 67 | #define PING_DEBUG LWIP_DBG_ON
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| 68 | #endif
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| 69 |
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| 70 | /** ping receive timeout - in milliseconds */
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| 71 | #ifndef PING_RCV_TIMEO
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| 72 | #define PING_RCV_TIMEO 1000
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| 73 | #endif
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| 74 |
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| 75 | /** ping delay - in milliseconds */
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| 76 | #ifndef PING_DELAY
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| 77 | #define PING_DELAY 1000
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| 78 | #endif
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| 79 |
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| 80 | /** ping identifier - must fit on a u16_t */
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| 81 | #ifndef PING_ID
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| 82 | #define PING_ID 0xAFAF
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| 83 | #endif
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| 84 |
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| 85 | /** ping additional data size to include in the packet */
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| 86 | #ifndef PING_DATA_SIZE
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| 87 | #define PING_DATA_SIZE 32
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| 88 | #endif
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| 89 |
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| 90 | /** ping result action - no default action */
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| 91 | #ifndef PING_RESULT
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| 92 | #define PING_RESULT(ping_ok)
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| 93 | #endif
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| 94 |
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| 95 | /* ping variables */
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| 96 | static const ip_addr_t* ping_target;
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| 97 | static u16_t ping_seq_num;
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| 98 | #if defined(LWIP_DEBUG) || defined(USE_PINGSEND)
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| 99 | static u32_t ping_time;
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| 100 | #endif /* LWIP_DEBUG */
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| 101 | #if !PING_USE_SOCKETS
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| 102 | static struct raw_pcb *ping_pcb;
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| 103 | #endif /* PING_USE_SOCKETS */
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| 104 |
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| 105 | /** Prepare a echo ICMP request */
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| 106 | static void
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| 107 | ping_prepare_echo( struct icmp_echo_hdr *iecho, u16_t len)
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| 108 | {
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| 109 | size_t i;
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| 110 | size_t data_len = len - sizeof(struct icmp_echo_hdr);
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| 111 |
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| 112 | ICMPH_TYPE_SET(iecho, ICMP_ECHO);
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| 113 | ICMPH_CODE_SET(iecho, 0);
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| 114 | iecho->chksum = 0;
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| 115 | iecho->id = PING_ID;
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| 116 | iecho->seqno = lwip_htons(++ping_seq_num);
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| 117 |
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| 118 | /* fill the additional data buffer with some data */
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| 119 | for(i = 0; i < data_len; i++) {
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| 120 | ((char*)iecho)[sizeof(struct icmp_echo_hdr) + i] = (char)i;
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| 121 | }
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| 122 |
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| 123 | iecho->chksum = inet_chksum(iecho, len);
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| 124 | }
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| 125 |
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| 126 | #if PING_USE_SOCKETS
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| 127 |
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| 128 | /* Ping using the socket ip */
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| 129 | static err_t
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| 130 | ping_send(int s, const ip_addr_t *addr)
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| 131 | {
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| 132 | int err;
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| 133 | struct icmp_echo_hdr *iecho;
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| 134 | struct sockaddr_storage to;
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| 135 | size_t ping_size = sizeof(struct icmp_echo_hdr) + PING_DATA_SIZE;
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| 136 | LWIP_ASSERT("ping_size is too big", ping_size <= 0xffff);
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| 137 |
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| 138 | #if LWIP_IPV6
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| 139 | if(IP_IS_V6(addr) && !ip6_addr_isipv4mappedipv6(ip_2_ip6(addr))) {
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| 140 | /* todo: support ICMP6 echo */
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| 141 | return ERR_VAL;
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| 142 | }
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| 143 | #endif /* LWIP_IPV6 */
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| 144 |
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| 145 | iecho = (struct icmp_echo_hdr *)mem_malloc((mem_size_t)ping_size);
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| 146 | if (!iecho) {
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| 147 | return ERR_MEM;
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| 148 | }
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| 149 |
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| 150 | ping_prepare_echo(iecho, (u16_t)ping_size);
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| 151 |
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| 152 | #if LWIP_IPV4
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| 153 | if(IP_IS_V4(addr)) {
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| 154 | struct sockaddr_in *to4 = (struct sockaddr_in*)&to;
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| 155 | to4->sin_len = sizeof(to4);
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| 156 | to4->sin_family = AF_INET;
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| 157 | inet_addr_from_ip4addr(&to4->sin_addr, ip_2_ip4(addr));
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| 158 | }
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| 159 | #endif /* LWIP_IPV4 */
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| 160 |
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| 161 | #if LWIP_IPV6
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| 162 | if(IP_IS_V6(addr)) {
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| 163 | struct sockaddr_in6 *to6 = (struct sockaddr_in6*)&to;
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| 164 | to6->sin6_len = sizeof(to6);
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| 165 | to6->sin6_family = AF_INET6;
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| 166 | inet6_addr_from_ip6addr(&to6->sin6_addr, ip_2_ip6(addr));
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| 167 | }
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| 168 | #endif /* LWIP_IPV6 */
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| 169 |
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| 170 | err = lwip_sendto(s, iecho, ping_size, 0, (struct sockaddr*)&to, sizeof(to));
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| 171 |
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| 172 | mem_free(iecho);
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| 173 |
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| 174 | return (err ? ERR_OK : ERR_VAL);
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| 175 | }
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| 176 |
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| 177 | static void
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| 178 | ping_recv(int s)
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| 179 | {
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| 180 | char buf[64];
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| 181 | int len;
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| 182 | struct sockaddr_storage from;
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| 183 | int fromlen = sizeof(from);
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| 184 |
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| 185 | while((len = lwip_recvfrom(s, buf, sizeof(buf), 0, (struct sockaddr*)&from, (socklen_t*)&fromlen)) > 0) {
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| 186 | if (len >= (int)(sizeof(struct ip_hdr)+sizeof(struct icmp_echo_hdr))) {
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| 187 | ip_addr_t fromaddr;
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| 188 | memset(&fromaddr, 0, sizeof(fromaddr));
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| 189 |
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| 190 | #if LWIP_IPV4
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| 191 | if(from.ss_family == AF_INET) {
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| 192 | struct sockaddr_in *from4 = (struct sockaddr_in*)&from;
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| 193 | inet_addr_to_ip4addr(ip_2_ip4(&fromaddr), &from4->sin_addr);
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| 194 | IP_SET_TYPE_VAL(fromaddr, IPADDR_TYPE_V4);
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| 195 | }
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| 196 | #endif /* LWIP_IPV4 */
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| 197 |
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| 198 | #if LWIP_IPV6
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| 199 | if(from.ss_family == AF_INET6) {
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| 200 | struct sockaddr_in6 *from6 = (struct sockaddr_in6*)&from;
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| 201 | inet6_addr_to_ip6addr(ip_2_ip6(&fromaddr), &from6->sin6_addr);
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| 202 | IP_SET_TYPE_VAL(fromaddr, IPADDR_TYPE_V6);
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| 203 | }
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| 204 | #endif /* LWIP_IPV6 */
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| 205 |
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| 206 | LWIP_DEBUGF( PING_DEBUG, ("ping: recv "));
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| 207 | ip_addr_debug_print_val(PING_DEBUG, fromaddr);
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| 208 | LWIP_DEBUGF( PING_DEBUG, (" %"U32_F" ms\n", (sys_now() - ping_time)));
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| 209 |
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| 210 | /* todo: support ICMP6 echo */
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| 211 | #if LWIP_IPV4
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| 212 | if (IP_IS_V4_VAL(fromaddr)) {
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| 213 | struct ip_hdr *iphdr;
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| 214 | struct icmp_echo_hdr *iecho;
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| 215 |
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| 216 | iphdr = (struct ip_hdr *)buf;
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| 217 | iecho = (struct icmp_echo_hdr *)(buf + (IPH_HL(iphdr) * 4));
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| 218 | if ((iecho->id == PING_ID) && (iecho->seqno == lwip_htons(ping_seq_num))) {
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| 219 | /* do some ping result processing */
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| 220 | PING_RESULT((ICMPH_TYPE(iecho) == ICMP_ER));
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| 221 | #ifdef USE_PINGSEND
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| 222 | syslog_2(LOG_NOTICE, "ping: ok [%08x] %dus", fromaddr.u_addr.ip4.addr, (sys_now() - ping_time));
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| 223 | #endif
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| 224 | return;
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| 225 | } else {
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| 226 | #ifdef USE_PINGSEND
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| 227 | syslog_0(LOG_NOTICE, "ping: drop");
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| 228 | #else
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| 229 | LWIP_DEBUGF( PING_DEBUG, ("ping: drop\n"));
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| 230 | #endif
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| 231 | }
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| 232 | }
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| 233 | #endif /* LWIP_IPV4 */
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| 234 | }
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| 235 | fromlen = sizeof(from);
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| 236 | }
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| 237 | #ifdef USE_PINGSEND
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| 238 | syslog_1(LOG_NOTICE, "ping: drop (%d)", len);
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| 239 | #endif
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| 240 |
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| 241 | if (len == 0) {
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| 242 | LWIP_DEBUGF( PING_DEBUG, ("ping: recv - %"U32_F" ms - timeout\n", (sys_now()-ping_time)));
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| 243 | }
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| 244 |
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| 245 | /* do some ping result processing */
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| 246 | PING_RESULT(0);
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| 247 | }
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| 248 |
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| 249 | static void
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| 250 | ping_thread(void *arg)
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| 251 | {
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| 252 | int s;
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| 253 | int ret;
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| 254 | #ifdef USE_PINGSEND
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| 255 | int count = 0;
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| 256 | #endif
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| 257 |
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| 258 | #if LWIP_SO_SNDRCVTIMEO_NONSTANDARD
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| 259 | int timeout = PING_RCV_TIMEO;
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| 260 | #else
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| 261 | struct timeval timeout;
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| 262 | timeout.tv_sec = PING_RCV_TIMEO/1000;
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| 263 | timeout.tv_usec = (PING_RCV_TIMEO%1000)*1000;
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| 264 | #endif
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| 265 | LWIP_UNUSED_ARG(arg);
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| 266 |
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| 267 | #if LWIP_IPV6
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| 268 | if(IP_IS_V4(ping_target) || ip6_addr_isipv4mappedipv6(ip_2_ip6(ping_target))) {
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| 269 | s = lwip_socket(AF_INET, SOCK_RAW, IP_PROTO_ICMP);
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| 270 | } else {
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| 271 | s = lwip_socket(AF_INET6, SOCK_RAW, IP6_NEXTH_ICMP6);
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| 272 | }
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| 273 | #else
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| 274 | s = lwip_socket(AF_INET, SOCK_RAW, IP_PROTO_ICMP);
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| 275 | #endif
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| 276 | if (s < 0) {
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| 277 | return;
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| 278 | }
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| 279 |
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| 280 | ret = lwip_setsockopt(s, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
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| 281 | LWIP_ASSERT("setting receive timeout failed", ret == 0);
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| 282 | LWIP_UNUSED_ARG(ret);
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| 283 |
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| 284 | while (1) {
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| 285 | #ifdef USE_PINGSEND
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| 286 | while(ping_target->u_addr.ip4.addr == 0){
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| 287 | dly_tsk(500);
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| 288 | }
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| 289 | #endif
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| 290 | if (ping_send(s, ping_target) == ERR_OK) {
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| 291 | LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
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| 292 | ip_addr_debug_print(PING_DEBUG, ping_target);
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| 293 | LWIP_DEBUGF( PING_DEBUG, ("\n"));
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| 294 |
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| 295 | ping_time = sys_now();
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| 296 | ping_recv(s);
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| 297 | } else {
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| 298 | LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
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| 299 | ip_addr_debug_print(PING_DEBUG, ping_target);
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| 300 | LWIP_DEBUGF( PING_DEBUG, (" - error\n"));
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| 301 | }
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| 302 | sys_msleep(PING_DELAY);
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| 303 | #ifdef USE_PINGSEND
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| 304 | if(++count > 3){
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| 305 | ((ip_addr_t*)ping_target)->u_addr.ip4.addr = 0;
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| 306 | count = 0;
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| 307 | }
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| 308 | #endif
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| 309 | }
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| 310 | }
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| 311 |
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| 312 | #ifdef USE_PINGSEND
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| 313 | void
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| 314 | set_pingaddr(uint32_t paddr)
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| 315 | {
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| 316 | ((ip_addr_t*)ping_target)->u_addr.ip4.addr = paddr;
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| 317 | }
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| 318 | #endif
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| 319 |
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| 320 | #else /* PING_USE_SOCKETS */
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| 321 |
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| 322 | /* Ping using the raw ip */
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| 323 | static u8_t
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| 324 | ping_recv(void *arg, struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *addr)
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| 325 | {
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| 326 | struct icmp_echo_hdr *iecho;
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| 327 | LWIP_UNUSED_ARG(arg);
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| 328 | LWIP_UNUSED_ARG(pcb);
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| 329 | LWIP_UNUSED_ARG(addr);
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| 330 | LWIP_ASSERT("p != NULL", p != NULL);
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| 331 |
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| 332 | if ((p->tot_len >= (PBUF_IP_HLEN + sizeof(struct icmp_echo_hdr))) &&
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| 333 | pbuf_remove_header(p, PBUF_IP_HLEN) == 0) {
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| 334 | iecho = (struct icmp_echo_hdr *)p->payload;
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| 335 |
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| 336 | if ((iecho->id == PING_ID) && (iecho->seqno == lwip_htons(ping_seq_num))) {
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| 337 | LWIP_DEBUGF( PING_DEBUG, ("ping: recv "));
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| 338 | ip_addr_debug_print(PING_DEBUG, addr);
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| 339 | LWIP_DEBUGF( PING_DEBUG, (" %"U32_F" ms\n", (sys_now()-ping_time)));
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| 340 |
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| 341 | /* do some ping result processing */
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| 342 | PING_RESULT(1);
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| 343 | pbuf_free(p);
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| 344 | return 1; /* eat the packet */
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| 345 | }
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| 346 | /* not eaten, restore original packet */
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| 347 | pbuf_add_header(p, PBUF_IP_HLEN);
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| 348 | }
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| 349 |
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| 350 | return 0; /* don't eat the packet */
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| 351 | }
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| 352 |
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| 353 | static void
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| 354 | ping_send(struct raw_pcb *raw, const ip_addr_t *addr)
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| 355 | {
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| 356 | struct pbuf *p;
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| 357 | struct icmp_echo_hdr *iecho;
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| 358 | size_t ping_size = sizeof(struct icmp_echo_hdr) + PING_DATA_SIZE;
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| 359 |
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| 360 | LWIP_DEBUGF( PING_DEBUG, ("ping: send "));
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| 361 | ip_addr_debug_print(PING_DEBUG, addr);
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| 362 | LWIP_DEBUGF( PING_DEBUG, ("\n"));
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| 363 | LWIP_ASSERT("ping_size <= 0xffff", ping_size <= 0xffff);
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| 364 |
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| 365 | p = pbuf_alloc(PBUF_IP, (u16_t)ping_size, PBUF_RAM);
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| 366 | if (!p) {
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| 367 | return;
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| 368 | }
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| 369 | if ((p->len == p->tot_len) && (p->next == NULL)) {
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| 370 | iecho = (struct icmp_echo_hdr *)p->payload;
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| 371 |
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| 372 | ping_prepare_echo(iecho, (u16_t)ping_size);
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| 373 |
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| 374 | raw_sendto(raw, p, addr);
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| 375 | #if defined(LWIP_DEBUG) || defined(USE_PINGSEND)
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| 376 | ping_time = sys_now();
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| 377 | #endif /* LWIP_DEBUG */
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| 378 | }
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| 379 | pbuf_free(p);
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| 380 | }
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| 381 |
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| 382 | static void
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| 383 | ping_timeout(void *arg)
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| 384 | {
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| 385 | struct raw_pcb *pcb = (struct raw_pcb*)arg;
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| 386 |
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| 387 | LWIP_ASSERT("ping_timeout: no pcb given!", pcb != NULL);
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| 388 |
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| 389 | ping_send(ping_pcb, ping_target);
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| 390 |
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| 391 | sys_timeout(PING_DELAY, ping_timeout, pcb);
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| 392 | }
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| 393 |
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| 394 | static void
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| 395 | ping_raw_init(void)
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| 396 | {
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| 397 | ping_pcb = raw_new(IP_PROTO_ICMP);
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| 398 | LWIP_ASSERT("ping_pcb != NULL", ping_pcb != NULL);
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| 399 |
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| 400 | raw_recv(ping_pcb, ping_recv, NULL);
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| 401 | raw_bind(ping_pcb, IP_ADDR_ANY);
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| 402 | sys_timeout(PING_DELAY, ping_timeout, ping_pcb);
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| 403 | }
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| 404 |
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| 405 | void
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| 406 | ping_send_now(void)
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| 407 | {
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| 408 | LWIP_ASSERT("ping_pcb != NULL", ping_pcb != NULL);
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| 409 | ping_send(ping_pcb, ping_target);
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| 410 | }
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| 411 |
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| 412 | #endif /* PING_USE_SOCKETS */
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| 413 |
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| 414 | void
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| 415 | ping_init(const ip_addr_t* ping_addr)
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| 416 | {
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| 417 | ping_target = ping_addr;
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| 418 |
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| 419 | #if PING_USE_SOCKETS
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| 420 | sys_thread_new("ping_thread", ping_thread, NULL, DEFAULT_THREAD_STACKSIZE, DEFAULT_THREAD_PRIO);
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| 421 | #else /* PING_USE_SOCKETS */
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| 422 | ping_raw_init();
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| 423 | #endif /* PING_USE_SOCKETS */
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| 424 | }
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| 425 |
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| 426 | #endif /* LWIP_RAW */
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