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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2013 Allied Telesis Labs NZ
- * Chris Packham, <judge.packham@gmail.com>
- *
- * Copyright (C) 2022 YADRO
- * Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
- */
- /* Simple ping6 implementation */
- #include <common.h>
- #include <net.h>
- #include <net6.h>
- #include "ndisc.h"
- static ushort seq_no;
- /* the ipv6 address to ping */
- struct in6_addr net_ping_ip6;
- int
- ip6_make_ping(uchar *eth_dst_addr, struct in6_addr *neigh_addr, uchar *pkt)
- {
- struct echo_msg *msg;
- u16 len;
- u16 csum_p;
- uchar *pkt_old = pkt;
- len = sizeof(struct echo_msg);
- pkt += net_set_ether(pkt, eth_dst_addr, PROT_IP6);
- pkt += ip6_add_hdr(pkt, &net_ip6, neigh_addr, PROT_ICMPV6,
- IPV6_NDISC_HOPLIMIT, len);
- /* ICMPv6 - Echo */
- msg = (struct echo_msg *)pkt;
- msg->icmph.icmp6_type = IPV6_ICMP_ECHO_REQUEST;
- msg->icmph.icmp6_code = 0;
- msg->icmph.icmp6_cksum = 0;
- msg->icmph.icmp6_identifier = 0;
- msg->icmph.icmp6_sequence = htons(seq_no++);
- msg->id = msg->icmph.icmp6_identifier; /* these seem redundant */
- msg->sequence = msg->icmph.icmp6_sequence;
- /* checksum */
- csum_p = csum_partial((u8 *)msg, len, 0);
- msg->icmph.icmp6_cksum = csum_ipv6_magic(&net_ip6, neigh_addr, len,
- PROT_ICMPV6, csum_p);
- pkt += len;
- return pkt - pkt_old;
- }
- int ping6_send(void)
- {
- uchar *pkt;
- static uchar mac[6];
- /* always send neighbor solicit */
- memcpy(mac, net_null_ethaddr, 6);
- net_nd_sol_packet_ip6 = net_ping_ip6;
- net_nd_packet_mac = mac;
- pkt = net_nd_tx_packet;
- pkt += ip6_make_ping(mac, &net_ping_ip6, pkt);
- /* size of the waiting packet */
- net_nd_tx_packet_size = (pkt - net_nd_tx_packet);
- /* and do the ARP request */
- net_nd_try = 1;
- net_nd_timer_start = get_timer(0);
- ndisc_request();
- return 1; /* waiting */
- }
- static void ping6_timeout(void)
- {
- eth_halt();
- net_set_state(NETLOOP_FAIL); /* we did not get the reply */
- }
- void ping6_start(void)
- {
- printf("Using %s device\n", eth_get_name());
- net_set_timeout_handler(10000UL, ping6_timeout);
- ping6_send();
- }
- int ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
- {
- struct icmp6hdr *icmp =
- (struct icmp6hdr *)(((uchar *)ip6) + IP6_HDR_SIZE);
- struct in6_addr src_ip;
- switch (icmp->icmp6_type) {
- case IPV6_ICMP_ECHO_REPLY:
- src_ip = ip6->saddr;
- if (memcmp(&net_ping_ip6, &src_ip, sizeof(struct in6_addr)))
- return -EINVAL;
- net_set_state(NETLOOP_SUCCESS);
- break;
- case IPV6_ICMP_ECHO_REQUEST:
- /* ignore for now.... */
- debug("Got ICMPv6 ECHO REQUEST from %pI6c\n", &ip6->saddr);
- return -EINVAL;
- default:
- debug("Unexpected ICMPv6 type 0x%x\n", icmp->icmp6_type);
- return -EINVAL;
- }
- return 0;
- }
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