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10#include <common.h>
11#include <dm.h>
12#include <malloc.h>
13#include <net.h>
14#include <asm/test.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18
19
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25
26struct eth_sandbox_priv {
27 uchar fake_host_hwaddr[ARP_HLEN];
28 struct in_addr fake_host_ipaddr;
29 uchar *recv_packet_buffer;
30 int recv_packet_length;
31};
32
33static bool disabled[8] = {false};
34static bool skip_timeout;
35
36
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38
39
40
41
42void sandbox_eth_disable_response(int index, bool disable)
43{
44 disabled[index] = disable;
45}
46
47
48
49
50
51
52void sandbox_eth_skip_timeout(void)
53{
54 skip_timeout = true;
55}
56
57static int sb_eth_start(struct udevice *dev)
58{
59 struct eth_sandbox_priv *priv = dev_get_priv(dev);
60
61 debug("eth_sandbox: Start\n");
62
63 fdtdec_get_byte_array(gd->fdt_blob, dev->of_offset, "fake-host-hwaddr",
64 priv->fake_host_hwaddr, ARP_HLEN);
65 priv->recv_packet_buffer = net_rx_packets[0];
66 return 0;
67}
68
69static int sb_eth_send(struct udevice *dev, void *packet, int length)
70{
71 struct eth_sandbox_priv *priv = dev_get_priv(dev);
72 struct ethernet_hdr *eth = packet;
73
74 debug("eth_sandbox: Send packet %d\n", length);
75
76 if (dev->seq >= 0 && dev->seq < ARRAY_SIZE(disabled) &&
77 disabled[dev->seq])
78 return 0;
79
80 if (ntohs(eth->et_protlen) == PROT_ARP) {
81 struct arp_hdr *arp = packet + ETHER_HDR_SIZE;
82
83 if (ntohs(arp->ar_op) == ARPOP_REQUEST) {
84 struct ethernet_hdr *eth_recv;
85 struct arp_hdr *arp_recv;
86
87
88 priv->fake_host_ipaddr = net_read_ip(&arp->ar_tpa);
89
90 eth_recv = (void *)priv->recv_packet_buffer;
91 memcpy(eth_recv->et_dest, eth->et_src, ARP_HLEN);
92 memcpy(eth_recv->et_src, priv->fake_host_hwaddr,
93 ARP_HLEN);
94 eth_recv->et_protlen = htons(PROT_ARP);
95
96 arp_recv = (void *)priv->recv_packet_buffer +
97 ETHER_HDR_SIZE;
98 arp_recv->ar_hrd = htons(ARP_ETHER);
99 arp_recv->ar_pro = htons(PROT_IP);
100 arp_recv->ar_hln = ARP_HLEN;
101 arp_recv->ar_pln = ARP_PLEN;
102 arp_recv->ar_op = htons(ARPOP_REPLY);
103 memcpy(&arp_recv->ar_sha, priv->fake_host_hwaddr,
104 ARP_HLEN);
105 net_write_ip(&arp_recv->ar_spa, priv->fake_host_ipaddr);
106 memcpy(&arp_recv->ar_tha, &arp->ar_sha, ARP_HLEN);
107 net_copy_ip(&arp_recv->ar_tpa, &arp->ar_spa);
108
109 priv->recv_packet_length = ETHER_HDR_SIZE +
110 ARP_HDR_SIZE;
111 }
112 } else if (ntohs(eth->et_protlen) == PROT_IP) {
113 struct ip_udp_hdr *ip = packet + ETHER_HDR_SIZE;
114
115 if (ip->ip_p == IPPROTO_ICMP) {
116 struct icmp_hdr *icmp = (struct icmp_hdr *)&ip->udp_src;
117
118 if (icmp->type == ICMP_ECHO_REQUEST) {
119 struct ethernet_hdr *eth_recv;
120 struct ip_udp_hdr *ipr;
121 struct icmp_hdr *icmpr;
122
123
124 memcpy(priv->recv_packet_buffer, packet,
125 length);
126 eth_recv = (void *)priv->recv_packet_buffer;
127 ipr = (void *)priv->recv_packet_buffer +
128 ETHER_HDR_SIZE;
129 icmpr = (struct icmp_hdr *)&ipr->udp_src;
130 memcpy(eth_recv->et_dest, eth->et_src,
131 ARP_HLEN);
132 memcpy(eth_recv->et_src, priv->fake_host_hwaddr,
133 ARP_HLEN);
134 ipr->ip_sum = 0;
135 ipr->ip_off = 0;
136 net_copy_ip((void *)&ipr->ip_dst, &ip->ip_src);
137 net_write_ip((void *)&ipr->ip_src,
138 priv->fake_host_ipaddr);
139 ipr->ip_sum = compute_ip_checksum(ipr,
140 IP_HDR_SIZE);
141
142 icmpr->type = ICMP_ECHO_REPLY;
143 icmpr->checksum = 0;
144 icmpr->checksum = compute_ip_checksum(icmpr,
145 ICMP_HDR_SIZE);
146
147 priv->recv_packet_length = length;
148 }
149 }
150 }
151
152 return 0;
153}
154
155static int sb_eth_recv(struct udevice *dev, int flags, uchar **packetp)
156{
157 struct eth_sandbox_priv *priv = dev_get_priv(dev);
158
159 if (skip_timeout) {
160 sandbox_timer_add_offset(11000UL);
161 skip_timeout = false;
162 }
163
164 if (priv->recv_packet_length) {
165 int lcl_recv_packet_length = priv->recv_packet_length;
166
167 debug("eth_sandbox: received packet %d\n",
168 priv->recv_packet_length);
169 priv->recv_packet_length = 0;
170 *packetp = priv->recv_packet_buffer;
171 return lcl_recv_packet_length;
172 }
173 return 0;
174}
175
176static void sb_eth_stop(struct udevice *dev)
177{
178 debug("eth_sandbox: Stop\n");
179}
180
181static int sb_eth_write_hwaddr(struct udevice *dev)
182{
183 struct eth_pdata *pdata = dev_get_platdata(dev);
184
185 debug("eth_sandbox %s: Write HW ADDR - %pM\n", dev->name,
186 pdata->enetaddr);
187 return 0;
188}
189
190static const struct eth_ops sb_eth_ops = {
191 .start = sb_eth_start,
192 .send = sb_eth_send,
193 .recv = sb_eth_recv,
194 .stop = sb_eth_stop,
195 .write_hwaddr = sb_eth_write_hwaddr,
196};
197
198static int sb_eth_remove(struct udevice *dev)
199{
200 return 0;
201}
202
203static int sb_eth_ofdata_to_platdata(struct udevice *dev)
204{
205 struct eth_pdata *pdata = dev_get_platdata(dev);
206
207 pdata->iobase = dev_get_addr(dev);
208 return 0;
209}
210
211static const struct udevice_id sb_eth_ids[] = {
212 { .compatible = "sandbox,eth" },
213 { }
214};
215
216U_BOOT_DRIVER(eth_sandbox) = {
217 .name = "eth_sandbox",
218 .id = UCLASS_ETH,
219 .of_match = sb_eth_ids,
220 .ofdata_to_platdata = sb_eth_ofdata_to_platdata,
221 .remove = sb_eth_remove,
222 .ops = &sb_eth_ops,
223 .priv_auto_alloc_size = sizeof(struct eth_sandbox_priv),
224 .platdata_auto_alloc_size = sizeof(struct eth_pdata),
225};
226
