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[J-u-boot.git] / net / ping6.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2013 Allied Telesis Labs NZ
4  * Chris Packham, <[email protected]>
5  *
6  * Copyright (C) 2022 YADRO
7  * Viacheslav Mitrofanov <[email protected]>
8  */
9
10 /* Simple ping6 implementation */
11
12 #include <net.h>
13 #include <net6.h>
14 #include "ndisc.h"
15
16 static ushort seq_no;
17
18 /* the ipv6 address to ping */
19 struct in6_addr net_ping_ip6;
20
21 int
22 ip6_make_ping(uchar *eth_dst_addr, struct in6_addr *neigh_addr, uchar *pkt)
23 {
24         struct echo_msg *msg;
25         u16 len;
26         u16 csum_p;
27         uchar *pkt_old = pkt;
28
29         len = sizeof(struct echo_msg);
30
31         pkt += net_set_ether(pkt, eth_dst_addr, PROT_IP6);
32         pkt += ip6_add_hdr(pkt, &net_ip6, neigh_addr, PROT_ICMPV6,
33                            IPV6_NDISC_HOPLIMIT, len);
34
35         /* ICMPv6 - Echo */
36         msg = (struct echo_msg *)pkt;
37         msg->icmph.icmp6_type = IPV6_ICMP_ECHO_REQUEST;
38         msg->icmph.icmp6_code = 0;
39         msg->icmph.icmp6_cksum = 0;
40         msg->icmph.icmp6_identifier = 0;
41         msg->icmph.icmp6_sequence = htons(seq_no++);
42         msg->id = msg->icmph.icmp6_identifier;  /* these seem redundant */
43         msg->sequence = msg->icmph.icmp6_sequence;
44
45         /* checksum */
46         csum_p = csum_partial((u8 *)msg, len, 0);
47         msg->icmph.icmp6_cksum = csum_ipv6_magic(&net_ip6, neigh_addr, len,
48                                                  PROT_ICMPV6, csum_p);
49
50         pkt += len;
51
52         return pkt - pkt_old;
53 }
54
55 int ping6_send(void)
56 {
57         uchar *pkt;
58         static uchar mac[6];
59
60         /* always send neighbor solicit */
61
62         memcpy(mac, net_null_ethaddr, 6);
63
64         net_nd_sol_packet_ip6 = net_ping_ip6;
65         net_nd_packet_mac = mac;
66
67         pkt = net_nd_tx_packet;
68         pkt += ip6_make_ping(mac, &net_ping_ip6, pkt);
69
70         /* size of the waiting packet */
71         net_nd_tx_packet_size = (pkt - net_nd_tx_packet);
72
73         /* and do the ARP request */
74         net_nd_try = 1;
75         net_nd_timer_start = get_timer(0);
76         ndisc_request();
77         return 1;               /* waiting */
78 }
79
80 static void ping6_timeout(void)
81 {
82         eth_halt();
83         net_set_state(NETLOOP_FAIL);    /* we did not get the reply */
84 }
85
86 void ping6_start(void)
87 {
88         printf("Using %s device\n", eth_get_name());
89         net_set_timeout_handler(10000UL, ping6_timeout);
90
91         ping6_send();
92 }
93
94 int ping6_receive(struct ethernet_hdr *et, struct ip6_hdr *ip6, int len)
95 {
96         struct icmp6hdr *icmp =
97             (struct icmp6hdr *)(((uchar *)ip6) + IP6_HDR_SIZE);
98         struct in6_addr src_ip;
99
100         switch (icmp->icmp6_type) {
101         case IPV6_ICMP_ECHO_REPLY:
102                 src_ip = ip6->saddr;
103                 if (memcmp(&net_ping_ip6, &src_ip, sizeof(struct in6_addr)))
104                         return -EINVAL;
105                 net_set_state(NETLOOP_SUCCESS);
106                 break;
107         case IPV6_ICMP_ECHO_REQUEST:
108                 /* ignore for now.... */
109                 debug("Got ICMPv6 ECHO REQUEST from %pI6c\n", &ip6->saddr);
110                 return -EINVAL;
111         default:
112                 debug("Unexpected ICMPv6 type 0x%x\n", icmp->icmp6_type);
113                 return -EINVAL;
114         }
115
116         return 0;
117 }
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