eeb0a2c693
Implement ping6 command to ping hosts using IPv6. It works the same way as an ordinary ping command. There is no ICMP request so it is not possible to ping our host. This patch adds options in Kconfig and Makefile to build ping6 command. Series-changes: 3 - Added structures and functions descriptions - Added to ping6_receive() return value instead of void Series-changes: 4 - Fixed structures and functions description style Signed-off-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com> Reviewed-by: Ramon Fried <rfried.dev@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
119 lines
2.6 KiB
C
119 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2013 Allied Telesis Labs NZ
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* Chris Packham, <judge.packham@gmail.com>
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*
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* Copyright (C) 2022 YADRO
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* Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
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*/
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/* Simple ping6 implementation */
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#include <common.h>
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#include <net.h>
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#include <net6.h>
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#include "ndisc.h"
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static ushort seq_no;
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/* the ipv6 address to ping */
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struct in6_addr net_ping_ip6;
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int
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ip6_make_ping(uchar *eth_dst_addr, struct in6_addr *neigh_addr, uchar *pkt)
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{
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struct echo_msg *msg;
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u16 len;
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u16 csum_p;
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uchar *pkt_old = pkt;
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len = sizeof(struct echo_msg);
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pkt += net_set_ether(pkt, eth_dst_addr, PROT_IP6);
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pkt += ip6_add_hdr(pkt, &net_ip6, neigh_addr, PROT_ICMPV6,
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IPV6_NDISC_HOPLIMIT, len);
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/* ICMPv6 - Echo */
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msg = (struct echo_msg *)pkt;
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msg->icmph.icmp6_type = IPV6_ICMP_ECHO_REQUEST;
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msg->icmph.icmp6_code = 0;
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msg->icmph.icmp6_cksum = 0;
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msg->icmph.icmp6_identifier = 0;
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msg->icmph.icmp6_sequence = htons(seq_no++);
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msg->id = msg->icmph.icmp6_identifier; /* these seem redundant */
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msg->sequence = msg->icmph.icmp6_sequence;
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/* checksum */
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csum_p = csum_partial((u8 *)msg, len, 0);
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msg->icmph.icmp6_cksum = csum_ipv6_magic(&net_ip6, neigh_addr, len,
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PROT_ICMPV6, csum_p);
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pkt += len;
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return pkt - pkt_old;
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}
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int ping6_send(void)
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{
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uchar *pkt;
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static uchar mac[6];
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/* always send neighbor solicit */
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memcpy(mac, net_null_ethaddr, 6);
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net_nd_sol_packet_ip6 = net_ping_ip6;
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net_nd_packet_mac = mac;
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pkt = net_nd_tx_packet;
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pkt += ip6_make_ping(mac, &net_ping_ip6, pkt);
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/* size of the waiting packet */
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net_nd_tx_packet_size = (pkt - net_nd_tx_packet);
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/* and do the ARP request */
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net_nd_try = 1;
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net_nd_timer_start = get_timer(0);
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ndisc_request();
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return 1; /* waiting */
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}
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static void ping6_timeout(void)
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{
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eth_halt();
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net_set_state(NETLOOP_FAIL); /* we did not get the reply */
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}
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void ping6_start(void)
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{
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printf("Using %s device\n", eth_get_name());
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net_set_timeout_handler(10000UL, ping6_timeout);
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ping6_send();
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}
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int ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
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{
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struct icmp6hdr *icmp =
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(struct icmp6hdr *)(((uchar *)ip6) + IP6_HDR_SIZE);
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struct in6_addr src_ip;
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switch (icmp->icmp6_type) {
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case IPV6_ICMP_ECHO_REPLY:
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src_ip = ip6->saddr;
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if (memcmp(&net_ping_ip6, &src_ip, sizeof(struct in6_addr)))
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return -EINVAL;
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net_set_state(NETLOOP_SUCCESS);
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break;
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case IPV6_ICMP_ECHO_REQUEST:
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/* ignore for now.... */
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debug("Got ICMPv6 ECHO REQUEST from %pI6c\n", &ip6->saddr);
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return -EINVAL;
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default:
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debug("Unexpected ICMPv6 type 0x%x\n", icmp->icmp6_type);
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return -EINVAL;
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}
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return 0;
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}
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