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mtd: nand: mxs_nand: add device tree support
[u-boot] / net / ping.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  *      Copied from Linux Monitor (LiMon) - Networking.
4  *
5  *      Copyright 1994 - 2000 Neil Russell.
6  *      (See License)
7  *      Copyright 2000 Roland Borde
8  *      Copyright 2000 Paolo Scaffardi
9  *      Copyright 2000-2002 Wolfgang Denk, wd@denx.de
10  */
11
12 #include "ping.h"
13 #include "arp.h"
14
15 static ushort ping_seq_number;
16
17 /* The ip address to ping */
18 struct in_addr net_ping_ip;
19
20 static void set_icmp_header(uchar *pkt, struct in_addr dest)
21 {
22         /*
23          *      Construct an IP and ICMP header.
24          */
25         struct ip_hdr *ip = (struct ip_hdr *)pkt;
26         struct icmp_hdr *icmp = (struct icmp_hdr *)(pkt + IP_HDR_SIZE);
27
28         net_set_ip_header(pkt, dest, net_ip);
29
30         ip->ip_len   = htons(IP_ICMP_HDR_SIZE);
31         ip->ip_p     = IPPROTO_ICMP;
32         ip->ip_sum   = compute_ip_checksum(ip, IP_HDR_SIZE);
33
34         icmp->type = ICMP_ECHO_REQUEST;
35         icmp->code = 0;
36         icmp->checksum = 0;
37         icmp->un.echo.id = 0;
38         icmp->un.echo.sequence = htons(ping_seq_number++);
39         icmp->checksum = compute_ip_checksum(icmp, ICMP_HDR_SIZE);
40 }
41
42 static int ping_send(void)
43 {
44         uchar *pkt;
45         int eth_hdr_size;
46
47         /* XXX always send arp request */
48
49         debug_cond(DEBUG_DEV_PKT, "sending ARP for %pI4\n", &net_ping_ip);
50
51         net_arp_wait_packet_ip = net_ping_ip;
52
53         eth_hdr_size = net_set_ether(net_tx_packet, net_null_ethaddr, PROT_IP);
54         pkt = (uchar *)net_tx_packet + eth_hdr_size;
55
56         set_icmp_header(pkt, net_ping_ip);
57
58         /* size of the waiting packet */
59         arp_wait_tx_packet_size = eth_hdr_size + IP_ICMP_HDR_SIZE;
60
61         /* and do the ARP request */
62         arp_wait_try = 1;
63         arp_wait_timer_start = get_timer(0);
64         arp_request();
65         return 1;       /* waiting */
66 }
67
68 static void ping_timeout_handler(void)
69 {
70         eth_halt();
71         net_set_state(NETLOOP_FAIL);    /* we did not get the reply */
72 }
73
74 void ping_start(void)
75 {
76         printf("Using %s device\n", eth_get_name());
77         net_set_timeout_handler(10000UL, ping_timeout_handler);
78
79         ping_send();
80 }
81
82 void ping_receive(struct ethernet_hdr *et, struct ip_udp_hdr *ip, int len)
83 {
84         struct icmp_hdr *icmph = (struct icmp_hdr *)&ip->udp_src;
85         struct in_addr src_ip;
86         int eth_hdr_size;
87
88         switch (icmph->type) {
89         case ICMP_ECHO_REPLY:
90                 src_ip = net_read_ip((void *)&ip->ip_src);
91                 if (src_ip.s_addr == net_ping_ip.s_addr)
92                         net_set_state(NETLOOP_SUCCESS);
93                 return;
94         case ICMP_ECHO_REQUEST:
95                 eth_hdr_size = net_update_ether(et, et->et_src, PROT_IP);
96
97                 debug_cond(DEBUG_DEV_PKT,
98                            "Got ICMP ECHO REQUEST, return %d bytes\n",
99                            eth_hdr_size + len);
100
101                 ip->ip_sum = 0;
102                 ip->ip_off = 0;
103                 net_copy_ip((void *)&ip->ip_dst, &ip->ip_src);
104                 net_copy_ip((void *)&ip->ip_src, &net_ip);
105                 ip->ip_sum = compute_ip_checksum(ip, IP_HDR_SIZE);
106
107                 icmph->type = ICMP_ECHO_REPLY;
108                 icmph->checksum = 0;
109                 icmph->checksum = compute_ip_checksum(icmph, len - IP_HDR_SIZE);
110                 memcpy(net_tx_packet, et, eth_hdr_size + len);
111                 net_send_packet(net_tx_packet, eth_hdr_size + len);
112                 return;
113 /*      default:
114                 return;*/
115         }
116 }